JP7337029B2 - Cooking device and method for manufacturing the cooking device - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a heating cooker that induction-heats a container housed in a main body, and a manufacturing method of the heating cooker.

2. Description of the Related Art As a heating cooker that induction-heats a container housed in a main body, there is one that has a coil frame (coil base) that holds a heating coil. The coil frame of the heating cooker described in Patent Document 1 has a deep bowl shape, and a heating coil is attached to the outside. A container is accommodated inside the coil frame, and a flange of the container is placed on the upper end of the coil base.

JP 2011-161077 A

The coil frame of the heating cooker described in Patent Document 1 fixes the heating coil and supports the container at the upper end. For this reason, the coil frame is required to have a shape that covers the outer surface of the container, and needs to be larger than the container, resulting in an increase in the size of the coil frame. If the coil frame becomes large, it is not easy to assemble the coil frame to the main body when manufacturing the heating cooker, and the workability at the time of manufacturing decreases.

Against the background of the above problems, the present disclosure provides a heating cooker that suppresses an increase in the size of the coil frame and a method for manufacturing the same.

A heating cooker according to the present disclosure includes a main body, a heating coil, and a coil frame that supports the heating coil and houses a container heated by the heating coil, and the coil frame is a bottom surface inside the main body. A dish-shaped bottom coil frame that is arranged in the container and supports the heating coil; At the lower part of the side coil frame, a diameter-reduced portion whose inner diameter decreases downward is provided, and the bottom coil frame is inserted inside the diameter-reduced portion of the side coil frame. and the reduced diameter portion restricts the downward movement of the bottom coil frame .
Further, a heating cooker according to the present disclosure includes a main body, a heating coil, and a coil frame that supports the heating coil and houses a container that is heated by the heating coil, and the coil frame is located inside the main body. A dish-shaped bottom coil frame that is arranged on the bottom surface of the container and supports the heating coil, and a hollow cylindrical side coil frame that is arranged so as to be continuous with the upper part of the bottom coil frame and covers the side surface of the container. The inner surface of the side coil frame is provided with a claw protruding radially inward of the side coil frame, and the bottom coil frame is inserted inside the side coil frame. The claw engages the edge of the bottom coil frame to restrict upward movement of the bottom coil frame.
A method for manufacturing a heating cooker according to the present disclosure is a method for manufacturing a heating cooker including a coil frame that supports a heating coil and accommodates a container heated by the heating coil inside, and includes a dish-shaped bottom a step of preparing a coil frame; a hollow cylindrical side coil frame having a reduced-diameter portion formed at the lower portion thereof, the inner diameter of which decreases downward, and protrudes radially inward from the inner surface of the coil frame; preparing a side coil frame having claws; inserting the bottom coil frame into the inside of the side coil frame from above; allowing an edge of the side coil frame to ride over the claws; and a step of joining the side coil frame.

According to the present disclosure, the coil frame is composed of a dish-shaped bottom coil frame that supports the heating coil, and a hollow cylindrical side coil frame that is arranged so as to be continuous with the top of the bottom coil frame and covers the side surface of the container. Configured. For this reason, each of the bottom coil frame and the side coil frame can be made smaller than when the coil frame is composed of one component. Therefore, it is possible to obtain a heating cooker and a method for manufacturing the same in which an increase in the size of the coil frame is suppressed.

It is a perspective view of cooking-by-heating machine 1 concerning an embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional schematic diagram of the heating cooker 1 which concerns on embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional schematic diagram of the heating cooker 1 which concerns on embodiment. 4 is a perspective view of a side coil frame 17b according to the embodiment; FIG. 4 is a top view of the side coil frame 17b according to the embodiment; FIG. 4 is a longitudinal sectional view of a side coil frame 17b according to the embodiment; FIG. It is a figure which expands and shows the X part of FIG. 4 is a perspective view of a bottom coil frame 17a according to the embodiment; FIG. 4 is a longitudinal sectional view of a bottom coil frame 17a according to the embodiment; FIG. It is a figure which expands and shows the Y part of FIG. 4 is a perspective view of a coil frame 17 according to the embodiment; FIG. 4 is a vertical cross-sectional view of a coil frame 17 according to an embodiment; FIG. Fig. 2 is a perspective view of a state in which a coil frame 17 and a support frame 26 according to the embodiment are assembled; 4 is a vertical cross-sectional view of a coil frame 17 and a support frame 26 according to the embodiment; FIG.

Hereinafter, an embodiment in which a heating cooker according to the present disclosure is applied to an electric rice cooker will be described with reference to the drawings. The present disclosure is not limited to the following embodiments, and various modifications can be made without departing from the gist of the present disclosure. Also, in the following description, terms representing directions (for example, "up", "down", "right", "left", "front", "back", etc.) are used as appropriate for ease of understanding. They are intended to be illustrative and not limiting of the present disclosure. Also, in each figure, the same reference numerals denote the same or corresponding parts, which are common throughout the specification. In each drawing, the relative dimensional relationship, shape, etc. of each component may differ from the actual one.

Embodiment.
FIG. 1 is a perspective view of a heating cooker 1 according to an embodiment. The heating cooker 1 has a body 12 and a lid body 13 provided on the top of the body 12 . The main body 12 is a housing that constitutes the outer shell of the heating cooker 1 . The lid 13 of this embodiment is attached to a hinge provided on the main body 12 and covers the upper portion of the main body 12 so as to be openable and closable. A button 15 for opening the lid 13 is provided on the front surface of the main body 12 . When the button 15 is pressed, the locked state between the lid 13 and the main body 12 is released, and the lid 13 opens. When the lid 13 is closed, the lid 13 and the main body 12 are locked.

FIG. 2 is a schematic vertical cross-sectional view of the heating cooker 1 according to the embodiment. FIG. 2 shows a cross section in the front-rear direction passing through the button 15 . A container 10 is housed inside the heating cooker 1 . The container 10 accommodates food inside. The container 10 is made of a material that is inductively heated, such as a magnetic material or a high resistance non-magnetic material. A flange 10a extending radially outward is provided at the edge of the upper opening of the container 10 .

An inner lid 14 is provided on the inner surface of the lid body 13 . When the lid body 13 is closed, the inner lid 14 closes the top opening of the container 10 .

A heating coil 11 , a power supply board 16 , a coil frame 17 , and a temperature sensor 20 are provided inside a main body 12 of the heating cooker 1 .

The heating coil 11 is heating means for heating the container 10 by induction. The heating coil 11 of the present embodiment has a bottom heating coil 11a, a bottom heating coil 11b, a bottom heating coil 11c, and a side heating coil 11d. The bottom heating coil 11 a is annular and provided at a position facing the outer surface of the bottom of the container 10 . The bottom heating coil 11b is an annular coil provided on the outer peripheral side of the bottom heating coil 11a. The bottom heating coil 11 b is provided at a position facing the outer surface of the bottom of the container 10 . The bottom heating coil 11c is an annular coil provided on the outer peripheral side of the bottom heating coil 11b. The bottom heating coil 11c is provided at a position facing the outer surface of the curved portion that connects the bottom and side surfaces of the container 10 . The side heating coil 11 d is an annular heating coil and is provided at a position facing the outer surface of the side of the container 10 . In the present embodiment, these are referred to as heating coils 11 when describing matters common to bottom heating coil 11a, bottom heating coil 11b, bottom heating coil 11c, and side heating coil 11d.

The power supply board 16 is a circuit board on which a power supply circuit for supplying a high frequency current to the heating coil 11 is mounted. The power supply circuit mounted on the power supply board 16 converts commercial power into high-frequency power via DC voltage and outputs the high-frequency power, and includes an inverter circuit having switching elements. The power supply board 16 is arranged on the back side inside the main body 12 in this embodiment. A power supply circuit for supplying high-frequency current independently to each of the bottom heating coil 11a, the bottom heating coil 11b, the bottom heating coil 11c, and the side heating coil 11d may be provided.

When a high frequency current is supplied to the heating coil 11 , a high frequency magnetic field is generated around the heating coil 11 . Eddy currents flow in the container 10 due to the high-frequency magnetic field, and Joule heat generated thereby heats the food material in the container 10 .

The coil frame 17 is a member that supports the heating coil 11, and has a bottom coil frame 17a and side coil frames 17b. The coil frame 17 is made of a non-metallic material such as synthetic resin having heat resistance. The coil frame 17 is provided inside the main body 12 . A specific structure of the coil frame 17 will be described later.

A temperature sensor 20 detects the temperature of the container 10 . The temperature sensor 20 of this embodiment is a contact temperature sensor that detects the temperature by contacting the bottom of the container 10 . Note that the specific configuration of the temperature sensor 20 is not limited to this, and an infrared sensor may be provided as the temperature sensor 20 in addition to or instead of the contact temperature sensor.

A ferrite 25 is provided outside the side coil frame 17b. The ferrite 25 is provided to concentrate the lines of magnetic force generated from the heating coil 11 on the container 10 . The ferrite 25 is attached so as to sandwich the side heating coil 11d between itself and the side coil frame 17b.

FIG. 3 is a vertical cross-sectional schematic diagram of the heating cooker 1 according to the embodiment. FIG. 3 shows a longitudinal section through the button 15 and does not include the container 10 shown in FIG. 2, the power supply board 16 in FIG. 3 is the same as the power supply board 16 in FIG.

A space formed inside the coil frame 17 having the bottom coil frame 17 a and the side coil frames 17 b is referred to as a container housing portion 27 . The container 10 shown in FIG. 2 is accommodated in the container accommodating portion 27 .

FIG. 4 is a perspective view of the side coil frame 17b according to the embodiment. FIG. 5 is a top view of the side coil frame 17b according to the embodiment. FIG. 6 is a longitudinal sectional view of the side coil frame 17b according to the embodiment. FIG. 6 shows a longitudinal section taken along line AA in FIGS. 4 and 5. As shown in FIG.

The side coil frame 17b is a hollow cylindrical member. The side coil frame 17b is located outside the outer surface of the container 10 shown in FIG. The side coil frame 17b has different diameters at the upper portion and the lower portion according to the shape of the outer surface of the container 10, and the diameter at the lower portion is smaller than that at the upper portion. In addition, the diameter of the lower portion of the side coil frame 17b gradually decreases from top to bottom. This portion with a smaller diameter is referred to as a diameter-reduced portion 17b1. By changing the diameter of the side coil frame 17b according to the shape of the outer surface of the container 10, the distance between the container 10 and the side coil frame 17b can be kept equal. By doing so, the distance between the side heating coil 11d supported by the side coil frame 17b and the container 10 can be kept equidistant.

A protruding portion 23 that protrudes radially outward of the side coil frame 17b is provided on the outer surface of the side coil frame 17b. In this embodiment, a plurality of protrusions 23 are provided at intervals on the outer surface of the side coil frame 17b. The protrusion 23 positions the upper end of the side heating coil 11d (see FIGS. 2 and 3) attached to the side coil frame 17b. A groove 23a is provided on the upper surface of the protrusion 23. As shown in FIG. This groove 23a is for connecting a support frame 26 and a side coil frame 17b, which will be described later.

A protrusion 29 is provided on the inner peripheral surface of the side coil frame 17b. The convex portion 29 protrudes inward from the inner peripheral surface of the side coil frame 17b.

7 is an enlarged view of the X portion of FIG. 6. FIG. A claw 22 is provided at the lower end of the inner surface of the side coil frame 17b. The claw 22 protrudes radially inward from the inner surface of the side coil frame 17b. The claw 22 protrudes from the inner surface of the side coil frame 17b by increasing from top to bottom, and the top surface of the claw 22 is inclined. The claws 22 of this embodiment are provided along the entire circumference of the inner surface of the side coil frame 17b. The inner diameter of the side coil frame 17 b is gradually narrowed at the claw 22 . There is a step between the claw 22 and the inner surface of the lower side coil frame 17b. The claw 22 functions as an engagement structure between the side coil frame 17b and the bottom coil frame 17a.

FIG. 8 is a perspective view of the bottom coil frame 17a according to the embodiment. FIG. 9 is a longitudinal sectional view of the bottom coil frame 17a according to the embodiment. FIG. 9 shows a longitudinal section taken along line BB in FIG.

The bottom coil frame 17a is a dish-shaped member having a substantially circular planar shape. As shown in FIG. 9, the side surface of the bottom coil frame 17a gradually decreases in diameter from top to bottom. Thus, the bottom coil frame 17a has inclined side surfaces. The bottom coil frame 17a is provided outside the bottom of the container 10 shown in FIG. 2 and supports the bottom heating coils 11a, 11b and 11c.

A groove 28 is provided in the upper edge of the bottom coil frame 17a. The grooves 28 are provided in the same number as the protrusions 29 of the side coil frame 17b. In this embodiment, there are one groove 28 and one protrusion 29 .

A sensor hole 30 into which the temperature sensor 20 shown in FIG. 2 is inserted is provided in the center of the bottom coil frame 17a.

10 is an enlarged view of the Y portion of FIG. 9. FIG. As shown in FIGS. 9 and 10, projections 24 are provided on the outer surface of the bottom coil frame 17a. The projecting portion 24 is provided at a position lower than the upper end of the bottom coil frame 17a. The protrusion 24 protrudes downward from the inclined outer surface of the bottom coil frame 17a. The projecting portion 24 of the present embodiment is provided over the entire circumference of the bottom coil frame 17a and has a tubular shape as a whole. An outer peripheral surface 24a of the protrusion 24 extends vertically. An inner peripheral surface 24b of the protrusion 24 is inclined so that the diameter of the protrusion 24 increases from top to bottom. The distance between the outer peripheral surface 24a and the inner peripheral surface 24b, that is, the thickness of the protrusion 24, gradually decreases from top to bottom. Inside the inner peripheral surface 24b of the projection 24, the bottom surface heating coil 11c shown in FIG. The arrangement of the bottom heating coil 11b will be described later.

FIG. 11 is a perspective view of the coil frame 17 according to the embodiment. 11 shows a state in which the side heating coil 11d is attached to the coil frame 17. FIG. FIG. 12 is a longitudinal sectional view of coil frame 17 according to the embodiment. In FIG. 12, a longitudinal section taken along line CC in FIG. 11 is shown together with the bottom heating coil 11a, the bottom heating coil 11b, and the bottom heating coil 11c.

The coil frame 17 is configured by combining the bottom coil frame 17a and the side coil frame 17b. Here, a method of connecting the bottom coil frame 17a and the side coil frame 17b among the manufacturing methods of the heating cooker 1 will be described. First, the side coil frame 17b shown in FIG. 6 is turned upside down and placed on an assembly workbench with the upper part facing down. Then, the bottom coil frame 17a shown in FIGS. 8 and 9 is inserted from above inside the cylindrical side coil frame 17b as shown in FIGS. A claw 22 is provided at the bottom of the side coil frame 17b as shown in FIGS. 6 and 7 and the like. The claw 22 protrudes from the inner surface of the side coil frame 17b so as to narrow the inner diameter of the side coil frame 17b from top to bottom, and the inner surface of the claw 22 is inclined. The outer surface of the bottom coil frame 17a is guided by the inclined surface of the claw 22, and the bottom coil frame 17a is fitted inside the side coil frame 17b.

The bottom coil frame 17a is pushed downward to get over the claws 22 of the side coil frames 17b. Then, the bottom coil frame 17a is fixed to the lower side of the claw 22. As shown in FIG. Since there is a step between the lower end of the claw 22 and the inner surface of the side coil frame 17b, this step positions the upper end of the bottom coil frame 17a. That is, the upper end of the bottom coil frame 17a abuts on the lower end of the claw 22, and upward movement of the bottom coil frame 17a is restricted. As shown in FIG. 12, the upper end of the bottom coil frame 17a overlaps the lower end of the side coil frame 17b in the radial direction. In this manner, the side coil frame 17b is attached so as to be continuous with the upper end of the bottom coil frame 17a, and the coil frame 17 is configured as an integral structure. The diameter of the lower end of the reduced diameter portion 17b1 (see FIG. 6) of the side coil frame 17b is the same as the diameter of the upper end of the bottom coil frame 17a. Therefore, the side coil frame 17b and the bottom coil frame 17a are connected with almost no gap.

When bottom coil frame 17a and side coil frame 17b are combined, projection 29 of side coil frame 17b shown in FIG. 6 is fitted into groove 28 of bottom coil frame 17a. By fitting the convex portion 29 into the groove 28, the bottom coil frame 17a and the side coil frame 17b are positioned in the circumferential direction.

The heating coil 11 is attached to the coil frame 17 configured by combining the bottom coil frame 17a and the side coil frame 17b in this manner.

The side heating coil 11d is provided on the outer peripheral surface of the side coil frame 17b. Specifically, the side heating coil 11d is wound around the side coil frame 17b so that the upper end of the side heating coil 11d is positioned on the lower surface of the protrusion 23 provided on the outer surface of the side coil frame 17b. . In the present embodiment, the upper end of the side heating coil 11d can be positioned by providing the protrusion 23 on the outer surface of the side coil frame 17b. Moreover, it is preferable that the conductive wire constituting the side heating coil 11d is wound around the side coil frame 17b at equal pitches. As described above, the side coil frame 17b is formed to match the outer diameter of the container 10 so as to be equidistant from the container 10, so that the side heating coil 11d and the container are supported by the side coil frame 17b. The distance between 10 is also uniform. At a position where the distance between the container 10 and the side heating coil 11d is uniform, the conductor wire of the side heating coil 11d is wound at an equal pitch, so that the amount of heat radially inward of the container 10 by the side heating coil 11d is made uniform. can get closer.

The bottom heating coil 11c is provided on the outer peripheral surface of the top of the bottom coil frame 17a. Specifically, a conductive wire forming the bottom heating coil 11c is looped around the inner side of the protrusion 24 provided on the outer surface of the bottom coil frame 17a. As shown in FIG. 10, there is a gap between the inner peripheral surface 24b of the protrusion 24 provided on the bottom coil frame 17a and the outer surface of the bottom coil frame 17a. A bottom heating coil 11c is arranged in this gap. The protrusion 24 positions the upper end of the bottom heating coil 11c.

Also, the projecting portion 24 is provided at a position lower than the upper end of the bottom coil frame 17a. As shown in FIG. 12, the projecting portion 24 is located below the portion where the side coil frame 17b and the bottom coil frame 17a are engaged with each other, and the engaged portion and the bottom heating coil 11c are separated from each other. It functions as a wall that divides the space in the radial direction. Here, a minute gap may occur in the engaging portion between the bottom coil frame 17a and the side coil frame 17b. When water flows inside the coil frame 17, the water may flow outside the bottom coil frame 17a along this gap. In the present embodiment, since the protrusions 24 are provided, it is possible to provide a distance between the engaging portion between the bottom coil frame 17a and the side coil frame 17b and the outer peripheral portion of the bottom heating coil 11a. can. Since the projecting portion 24 is interposed between the engaging portion between the bottom coil frame 17a and the side coil frame 17b and the bottom surface heating coil 11a, contact of water with the bottom surface heating coil 11c can be suppressed.

The lower end of the projecting portion 24 may be positioned below the lower end of the upper end of the bottom heating coil 11c provided on the outer surface of the bottom coil frame 17a, which is the portion facing the projecting portion 24. good. That is, the length of the projection 24 in the vertical direction is extended from that of the projection 24 shown in FIG. Position the lower end of the By doing so, the outer side of the bottom heating coil 11c facing the projection 24 is surrounded by the projection 24, which is a cylindrical wall, so that the effect of preventing the bottom heating coil 11c from coming into contact with water can be enhanced. can.

The bottom heating coil 11a and the bottom heating coil 11b are fixed to the outer surface of the bottom of the bottom coil frame 17a. In this embodiment, the bottom surface heating coil 11a and the bottom surface heating coil 11b are arranged in a double annular shape on the outer surface of the flat bottom of the bottom coil frame 17a.

FIG. 13 is a perspective view of the assembled coil frame 17 and support frame 26 according to the embodiment. FIG. 14 is a longitudinal sectional view of the coil frame 17 and support frame 26 according to the embodiment. FIG. 14 shows a longitudinal section taken along line DD in FIG.

The support frame 26 is a member that is attached to the upper portion of the coil frame 17 and supports the flange 10a of the container 10 (see FIG. 2) from below. An opening into which the container 10 is inserted is provided in the center of the support frame 26 . The support frame 26 has a flat plate member extending radially outward from the upper portion of the side coil frame 17b, and the flange 10a (see FIG. 2) is placed on this flat plate portion. The container 10 (see FIG. 2) is accommodated in the coil frame 17 while being suspended from the support frame 26 .

The lower surface of the support frame 26 is provided with an engaging portion 31 that engages with the projecting portion 23 of the side coil frame 17b. The engaging portions 31 are provided in the same number as the protrusions 23 provided on the outer surface of the side coil frame 17b, and are engaged with the protrusions 23. As shown in FIG. In the example of the present embodiment, the engaging portion 31 has a claw that engages with the groove 23a (see FIGS. 4 and 5) provided in the protrusion 23. As shown in FIG. The claws of the engaging portion 31 are inserted into the grooves 23a of the projections 23, and the side coil frame 17b and the support frame 26 are rotated in opposite directions in the circumferential direction, so that the engaging portions 31 are engaged with the edges of the grooves 23a. Both are fixed in such a manner that the side coil frame 17b is suspended from the support frame 26. As shown in FIG. The engagement structure between the projecting portion 23 and the engaging portion 31 is not limited to this form, and the engaging portion 31 may be provided with a groove, and the projecting portion 23 may be provided with a claw that engages with the groove.

As shown in FIG. 14, a ferrite holder 18 and a ferrite 19 are provided under the bottom coil frame 17a. The ferrite holder 18 is made of PET resin or silicon and is a member that holds the ferrite 19 . In this embodiment, the ferrite 19 is inserted into a groove formed in the ferrite holder 18 and held. The ferrite holder 18 is screwed to the bottom coil frame 17a with the bottom heating coil 11a, the bottom heating coil 11b, and the bottom heating coil 11c interposed therebetween. The ferrite 19 functions as a noise filter of the magnetic field generated from the bottom heating coils 11 a , 11 b , 11 c to the outside of the power supply board 16 (see FIG. 2 ) and the heating cooker 1 .

As described above, the heating cooker 1 of the present embodiment includes the main body 12, the heating coil 11, and the coil frame 17 that supports the heating coil 11 and accommodates the container 10 that is heated by the heating coil 11. . The coil frame 17 has a bottom coil frame 17a and a side coil frame 17b. The bottom coil frame 17a is disposed on the bottom surface of the main body 12 and has a plate shape that supports the bottom heating coils 11a, 11b, and 11c. The side coil frame 17b is arranged so as to be continuous with the upper part of the bottom coil frame 17a and has a hollow cylindrical shape that covers the side surface of the container 10 . In this way, since the coil frame 17 is composed of the dish-shaped bottom coil frame 17a and the cylindrical side coil frame 17b, the bottom coil frame 17a and the side coils are more compact than when the coil frame 17 is composed of a single component. The size of the frame 17b can be reduced.

A reduced diameter portion 17b1 is provided at the lower portion of the side coil frame 17b, the inner diameter of which decreases downward. The bottom coil frame 17a is inserted inside the reduced diameter portion 17b1 of the side coil frame 17b, and the reduced diameter portion 17b1 restricts the downward movement of the bottom coil frame 17a. Since the downward movement of the bottom coil frame 17a with respect to the side coil frame 17b is restricted by the shapes of the side coil frame 17b and the bottom coil frame 17a, there is no need to provide other components. Therefore, an increase in the number of parts is suppressed, and manufacturing is easy.

Further, the inner surface of the side coil frame 17b is provided with a claw 22 that protrudes radially inward of the side coil frame 17b. The bottom coil frame 17a is inserted inside the side coil frame 17b, and the claw 22 locks the edge of the bottom coil frame 17a to restrict the upward movement of the bottom coil frame 17a. . Since the upward movement of the bottom coil frame 17a with respect to the side coil frame 17b is restricted by the shapes of the side coil frame 17b and the bottom coil frame 17a, there is no need to provide other parts. Therefore, an increase in the number of parts is suppressed, and manufacturing is easy.

A protrusion 24 extending downward is provided on the outer surface of the bottom coil frame 17a so as to surround the outer peripheral end of the bottom heating coil 11c from the outside. Therefore, even if water enters the gap between the bottom coil frame 17a and the side coil frame 17b, the protrusion 24 acts as a wall against the bottom surface heating coil 11c, thereby suppressing contact of water with the bottom surface heating coil 11c. can.

A groove 28 is provided in the bottom coil frame 17a, and a protrusion 29 is provided in the side coil frame 17b. 17b is restricted from moving in the circumferential direction. It should be noted that the protrusion 29 may be provided on the bottom coil frame 17a and the groove 28 may be provided on the side coil frame 17b. Since the circumferential movement of the bottom coil frame 17a with respect to the side coil frame 17b is restricted by the shapes of the side coil frame 17b and the bottom coil frame 17a, no other component is required. Therefore, an increase in the number of parts is suppressed, and manufacturing is easy. In addition, since the positional relationship in the circumferential direction between the bottom coil frame 17a and the side coil frames 17b is unique, the position of the heating coil 11 supported by the coil frame 17 can also be unique. Thereby, the positional relationship between the container 10 and the heating coil 11 becomes constant, and the heating condition of the container 10 by the heating coil 11 can be maintained well.

Further, a side heating coil 11d that heats the side surface of the container 10 is provided on the outer side surface of the side coil frame 17b. Therefore, compared with the case where only the bottom heating coils 11a, 11b, and 11c for heating the bottom of the container 10 are provided, the heating amount can be increased and the entire container 10 can be uniformly heated.

In addition, the distance from the outer surface of the container 10 to the outer surface of the side coil frame 17b was kept constant. Specifically, when the outer diameter of the lower portion of the container 10 decreases toward the lower portion as in the present embodiment, the outer diameter of the lower portion of the side coil frame 17b decreases toward the lower portion 17b1. was established. By making the distance from the outer surface of the container 10 to the outer surface of the side coil frame 17b constant, the distance between the side heating coil 11d attached to the outer surface of the side coil frame 17b and the container 10 is also constant. Therefore, the amount of heating radially inward of the container 10 by the side heating coil 11d can be made nearly uniform.

In particular, when the heating cooker 1 is a rice cooker, precise heating control is required to achieve separate cooking. In order for precise heating control to exhibit its effect, it is desirable that the positional relationship between the heating coil 11 and the container 10 is constant, that is, that manufacturing errors are small. According to the present embodiment, bottom coil frame 17a and side coil frame 17b are positioned vertically and circumferentially. Also, the distance from the outer surface of the container 10 to the outer surface of the side coil frame 17b is constant. Therefore, the positional relationship between the container 10 and the heating coil 11 assembled to the coil frame 17 can be kept constant, and desired cooking can be realized.

A support frame 26 is provided for supporting the flange 10a provided at the upper end of the container 10 from below, the support frame 26 is provided with an engaging portion 31, and the protrusion 23 of the side coil frame 17b is provided with a groove 23a. ing. By engaging the engaging portion 31 of the support frame 26 with the groove 23a of the side coil frame 17b, the support frame 26 and the side coil frame 17b are fixed. Note that the support frame 26 may be provided with the groove 23a, and the projection 23 of the side coil frame 17b may be provided with the engaging portion 31. As shown in FIG. Since the side coil frame 17b and the support frame 26 are fixed by the shapes of the side coil frame 17b and the support frame 26, there is no need to provide other parts for fixing. Therefore, an increase in the number of parts is suppressed, and manufacturing is easy.

Cooking device 1 of the present embodiment also includes a step of preparing dish-shaped bottom coil frame 17a and a step of preparing hollow cylindrical side coil frame 17b. The side coil frame 17b has a reduced-diameter portion 17b1 formed at its lower portion, the inner diameter of which decreases downward, and has claws 22 protruding radially inward on its inner surface. When assembling the heating cooker 1, the side coil frame 17b is turned upside down and placed on the assembly workbench with the upper part of the side coil frame 17b facing downward. Then, a step of inserting the bottom coil frame 17a into the side coil frame 17b from above, letting the edge of the side coil frame 17b climb over the claw 22, and joining the bottom coil frame 17a and the side coil frame 17b. and In this way, since it is not necessary to use parts other than these parts for joining the bottom coil frame 17a and the side coil frame 17b, the manufacturing of the cooking device 1 is facilitated.

In this embodiment, an example in which the bottom heating coil 11a, the bottom heating coil 11b, and the bottom heating coil 11c are provided on the bottom coil frame 17a is shown. However, the number of heating coils provided on the bottom coil frame 17a is not limited to this. Also, a plurality of side heating coils 11d may be provided on the side coil frame 17b.

Moreover, in this Embodiment, although the example which the heat cooker 1 was a rice cooker was shown, the heat cooker 1 may be an electric pan which is not only for cooking rice.

1 heating cooker 10 container 10a flange 11 heating coil 11a bottom heating coil 11b bottom heating coil 11c bottom heating coil 11d side heating coil 12 body 13 lid 14 inner lid 15 button 16 Power supply board, 17 coil frame, 17a bottom coil frame, 17b side coil frame, 17b1 diameter reduction portion, 18 ferrite holder, 19 ferrite, 20 temperature sensor, 22 claw, 23 protrusion, 23a groove, 24 protrusion, 24a outer circumference Surface 24b Inner peripheral surface 25 Ferrite 26 Supporting frame 27 Container accommodating portion 28 Groove 29 Protruding portion 30 Sensor hole 31 Engaging portion.

Claims (10)

the main body;
a heating coil;
A coil frame that supports the heating coil and houses a container heated by the heating coil,
The coil frame is
a dish-shaped bottom coil frame disposed on the bottom surface of the main body and supporting the heating coil;
a hollow cylindrical side coil frame disposed so as to be continuous with the top of the bottom coil frame and covering the side surface of the container ;
At the bottom of the side coil frame, a diameter-reduced portion having an inner diameter that decreases downward is provided,
The bottom coil frame is inserted inside the reduced diameter portion of the side coil frame, and the reduced diameter portion restricts the downward movement of the bottom coil frame.
heating cooker. the main body;
a heating coil;
A coil frame that supports the heating coil and houses a container heated by the heating coil,
The coil frame is
a dish-shaped bottom coil frame that is disposed on the bottom surface of the main body and supports the heating coil;
a hollow cylindrical side coil frame disposed so as to be continuous with the top of the bottom coil frame and covering the side surface of the container;
An inner surface of the side coil frame is provided with a claw protruding radially inward of the side coil frame,
The bottom coil frame is inserted inside the side coil frame, and the claw engages the edge of the bottom coil frame to restrict upward movement of the bottom coil frame.
heating cooker. An inner surface of the side coil frame is provided with a claw protruding radially inward of the side coil frame,
The bottom coil frame is inserted inside the side coil frame, and the claw engages an edge of the bottom coil frame to restrict upward movement of the bottom coil frame. 1. The heating cooker according to 1 . 4. The outer surface of the bottom coil frame is provided with a projecting portion that surrounds the outer peripheral end of the heating coil from the outside and extends downward. heating cooker. 5. The heating cooker according to claim 4, wherein the lower end of the protrusion is located below the lower end of the upper end of the heating coil facing the protrusion. One of the bottom coil frame and the side coil frame is provided with a groove, and the other is provided with a protrusion. By fitting the protrusion into the groove, the bottom coil frame and the side coil frame are formed. The heating cooker according to any one of claims 1 to 5, wherein circumferential movement of the frame is restricted. The heating cooker according to any one of claims 1 to 6, further comprising a side heating coil attached to the outer side of the side coil frame and heating the side of the container. The heating cooker according to claim 7, wherein the distance from the outer surface of the container to the outer surface of the side coil frame is constant. A support frame that supports the flange provided at the upper end of the container from below,
The heat cooking according to any one of claims 1 to 6, wherein one of the support frame and the side coil frame is provided with a groove, and the other is provided with an engaging portion that engages with the groove. vessel. A method for manufacturing a heating cooker having a coil frame that supports a heating coil and houses therein a container heated by the heating coil,
providing a dish-shaped bottom coil frame;
A hollow-cylindrical side coil frame having a diameter-reduced portion formed at its lower portion, the inner diameter of which decreases toward the bottom, and a claw projecting radially inward from the inner surface of the side coil frame. the process of preparing,
a step of inserting the bottom coil frame inside the side coil frame from above, causing the edge of the side coil frame to ride over the claw, and joining the bottom coil frame and the side coil frame; A method for manufacturing a heating cooker.

Images