JP6089109B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device.

  Conventionally, as an example of a heating cooker, for example, there is a rice cooker described in Japanese Patent No. 3477951 (Patent Document 1). This rice cooker includes an inner pot having a magnetic metal on the outer surface, an induction heating coil for heating the inner pot, and a temperature sensor provided at the center of the inner pot bottom. And the some unevenness | corrugation is provided in the magnetic metal part of the outer surface of an inner pot.

Japanese Patent No. 3477951

  However, in the said conventional rice cooker, since the several unevenness | corrugation is uniformly formed in the outer surface of an inner pot, since the surface area heated in an inner pot is substantially uniform, heat_generation | fever distribution becomes substantially uniform. Therefore, in the part away from the bottom of the inner pot, not only the heat directly heated by the induction heating coil but also heat due to heat conduction is applied, and the radial outer part farther from the bottom than the temperature of the bottom of the inner pot is added. Since the temperature is higher, there is a problem that the temperature sensor arranged at the center of the bottom of the inner pot cannot accurately measure the temperature of the inner pot.

  Then, the subject of this invention is providing the heating cooker which can detect the temperature of an inner pot correctly.

In order to solve the above problems, the heating cooker of the present invention is
While containing the object to be heated, an inner pot having a magnetic material on the outer surface,
An induction heating coil arranged to heat the magnetic body of the inner pot;
A temperature sensor for detecting the temperature of the bottom of the inner pan,
It said inner bowl has a plurality of first grooves and a plurality of second grooves formed so as to intersect each other physician,
Irregularities formed by the plurality of first groove portions and the plurality of second groove, characterized in that it becomes dense toward the center of the inner pot.
Moreover, in the heating cooker of one embodiment,
The plurality of first groove portions and the plurality of second groove portions are formed such that the outside is recessed in a portion facing the induction heating coil.

Moreover, in the heating cooker of one embodiment,
The interval between the plurality of adjacent first groove portions is gradually increased from the center of the inner pot toward the radially outer side, and the interval between the plurality of adjacent second groove portions is radial from the center of the inner pot. It is formed so as to increase gradually toward the outside.

Moreover, in the heating cooker of one embodiment,
The plurality of first groove portions are formed along a plurality of first curves that extend from the center of the inner pot to the outer side in the radial direction while curving in one of the circumferential directions, and are arranged at intervals in the circumferential direction. And
The plurality of second groove portions extend while curving from the center of the inner pot toward the radially outer side in the circumferential direction, and along a plurality of second curves arranged at intervals in the circumferential direction. Is formed.

Moreover, in the heating cooker of one embodiment,
The curvatures of the plurality of first groove portions and the plurality of second groove portions increase toward the radially outer side.

Moreover, in the heating cooker of one embodiment,
The non-heating part which is not facing the said induction heating coil of the said inner pot is flat.

  According to the cooking device of the present invention, since the surface area of the center portion of the inner pot is larger than that of the outer side, the heat distribution of the inner pot becomes higher toward the center portion. For this reason, the difference of the temperature of the center part of an inner pot and the temperature of a radial direction outer side decreases, and the temperature of an inner pot can be correctly measured with the temperature sensor arrange | positioned at the center of an inner pot bottom part.

It is a perspective view which shows the rice cooker of one Embodiment of the heating cooker of this invention. It is a perspective view which shows the state which opened the cover body of the said rice cooker. It is a schematic diagram of the longitudinal cross-section of the said rice cooker. It is a side view of the inner pot of the said rice cooker. It is a bottom view of the inner pot of the rice cooker.

  Hereinafter, the cooking device of the present invention will be described in detail with reference to an illustrated embodiment.

  FIG. 1: has shown the perspective view of the rice cooker of one Embodiment of the heating cooker of this invention.

  The rice cooker of this embodiment is provided with the rice cooker main body 1 and the cover body 2 attached to the upper part of the rice cooker main body 1 so that opening and closing is possible, as shown in FIG. The rice cooker body 1 includes a display operation unit 5 provided on the front side, a hook button 6 provided on the front side and the upper side, and a power cord 7 connected to the rear side and the lower side. A steam port 2 a is provided on the rear surface side of the lid 2. The display operation unit 5 includes a liquid crystal display unit 3 and an operation button group 4 as an example of the operation unit. The display operation unit 5 can display a cooking menu, cooking status, and the like and perform button operations.

  Moreover, FIG. 2 has shown the perspective view of the state which opened the cover body 2 of the said rice cooker.

  As shown in FIG. 2, the rice cooker includes an inner pot 10 housed in the rice cooker body 1, and the lid 2 is closed so as to cover the inner pot 10.

  The inner pot 10 is formed of a high heat conductive member such as aluminum, and a magnetic material such as stainless steel is applied to the outer surface of the inner pot 10 to improve the heating efficiency, while the inner surface is coated with a fluororesin to prevent adhesion of an object to be heated. doing.

  The lid 2 includes an outer lid 21 that is rotatably supported by the rice cooker body 1 and an inner lid 22 that is detachably attached to the inner pan 10 side of the outer lid 21. An annular heat-resistant rubber packing 23 is detachably attached to the outer periphery of the inner lid 22. When the lid 2 is closed, the packing 23 comes into close contact with the inner pot 10 and seals between the inner pot 10 and the inner lid 22. Further, the inner lid 22 is provided with a steam discharge port (not shown).

  Moreover, the to-be-latched part 8 is provided in the front part of the upper surface of the rice cooker main body 1. FIG. A locking portion 25 provided at the front portion of the lower surface of the lid body 2 is releasably locked to the locked portion 8. In addition, a lock mechanism 9 that locks the lid 2 is provided in the rice cooker body 1. When the lock mechanism 9 is not locking the lid 2, when the hook button 6 is pressed, the locked portion 8 moves rearward and the locking of the locking portion 25 with respect to the locked portion 8 is released. The On the other hand, when the lock mechanism 9 locks the lid 2, even if the hook button 6 is pressed, the locked portion 8 does not move backward, and the locking portion 25 is locked to the locked portion 8. It will not be released.

  In addition, a drive motor 24 is disposed at the right rear portion in the outer lid 21, and a connecting portion (not shown) is disposed in the central portion of the outer lid 21. The connecting portion 20 rotates by receiving the rotational driving force generated by the drive motor 24 via a pulley (not shown) and a belt (not shown).

  Moreover, the heat-resistant resin-made stirring unit 11 is rotatably attached to the inner lid 22 on the inner pot 10 side. The stirring unit 11 includes a rotating body 12 having a flat gourd shape, and first and second stirring arms 13A and 13B disposed on both sides of the rotating body 12. One end of each of the first and second stirring arms 13A and 13B is attached to both ends of the rotating body 12 so as to be rotatable in the vertical direction. In addition, a drive mechanism (not shown) for rotating the first and second stirring arms 13A and 13B is provided in the rotating body 12 of the stirring unit 11.

  The stirring unit 11, the connecting part 20, and the drive motor 24 constitute a stirring part.

  FIG. 3: has shown the schematic diagram of the longitudinal cross-section of the said rice cooker.

  As shown in FIG. 3, an induction heating coil 41 and a temperature sensor 42 are provided at the bottom of the rice cooker body 1. The temperature sensor 42 is arranged at the center of the bottom of the rice cooker body 1 so as to come into contact with the bottom 18a of the body 18 of the inner pot 10 when the inner pot 10 is stored.

  The rice cooker is provided with a control device (not shown) including a microcomputer and an input / output circuit. The control device controls the display operation unit 5, the lock mechanism 9, the drive motor 24, and the induction heating coil inverter circuit (not shown) based on signals input from the display operation unit 5 and the temperature sensor 42. The induction heating coil 41 is controlled via the induction heating coil inverter circuit.

  Next, the inner pot 10 will be described in more detail with reference to FIGS. 4 and 5.

  As shown in FIG. 4, the inner pot 10 has an upper end (the upper side in FIG. 4) that is open, and an annular flange portion 16 is provided at the edge of the opening. Inner pan handles 17 and 17 made of heat resistant resin are attached to the flange portion 16 so as to face each other. The body portion 18 of the inner pot 10 includes a cylindrical portion 18c that extends vertically downward from the inner peripheral edge of the flange portion 16, a curved portion 18b that curves from the lower end of the cylindrical portion 18c toward the center, and a planar circle. The bottom portion 18a has a shape.

  As shown in FIGS. 4 and 5, the inner pot 10 has first groove portions 31, 51 and second groove portions 32 formed on the outer surfaces of the bottom portion 18 a and the curved portion 18 b of the body portion 18 by, for example, pressing. , 52. The first groove portions 31, 51 and the second groove portions 32, 52 form unevenness that is dense toward the center of the bottom portion 18 a of the inner pot 10 on the outer surface of the inner pot 10. In the bending portion 18b, as shown in FIG. 3, the first groove portions 31, 51 and the second groove portions 32, 52 are formed in a side band shape, and a side band-like flat portion 61 is provided at the lower end portion continuous to the bottom portion 18a. Yes. Further, as shown in FIG. 4, the first groove portions 31, 51 and the second groove portions 32, 52 are formed in an annular shape at the bottom portion 18 a, and a circular flat portion 62 is provided at the center portion. The part (namely, the part in which the 1st groove parts 31 and 51 and the 2nd groove parts 32 and 52 are formed) continued from the curved part 18b of the bottom part 18a to the flat part 62 is the center of the inner pot 10, as shown in FIG. It has a dent shape that inclines toward.

  The 1st groove parts 31 and 51 are formed along the 1st curve extended while curving to one side of the peripheral direction from the outer periphery of the flat part 62 of the bottom part 18a of the inner pot 10 to the radial direction outer side. The first groove portions 31 are arranged at equal intervals on the outer peripheral edge of the flat portion 62, and the first groove portions 51 are arranged at equal intervals on the outer peripheral edge of the flat portion 61. Moreover, the 2nd groove parts 32 and 52 are formed along the 2nd curve extended while curving in the other of the circumferential direction from the outer periphery of the flat part 61 of the bottom part 18a of the inner pot 10 to the radial direction outer side. Similarly to the first groove portions 31 and 51, the second groove portions 32 and 52 are arranged at equal intervals on the outer peripheral edge of the flat portion 62, and the second groove portions 52 are equally spaced on the outer peripheral edge of the flat portion 61. Is arranged. That is, the first groove portions 31 and 51 and the second groove portions 32 and 52 intersect with each other, but the first groove portions 31 and 51 or the second groove portions 32 and 52 do not intersect with each other.

  As shown in FIG. 5, the first curve and the second curve are, for example, logarithmic spirals (plan view), and the curvatures at the same radial distance from the center of the inner pot 10 are different from each other. For this reason, as for a 1st curve and a 2nd curve, the space | interval with an adjacent curve becomes large gradually toward the radial direction outer side from the center of the bottom part 18a of the inner pot 10. As shown in FIG. That is, toward the center of the bottom 18a of the inner pot 10, the interval between the first groove portions 31, 51 and the interval between the second groove portions 32, 52 are dense, and the first groove portions 31, 51 and the second groove portion 32, The unevenness formed by 52 is dense toward the center of the inner pot 10. For this reason, since the surface area of the bottom part 18a of the inner pot 10 becomes large compared with the surface area of the radial direction outer side of the inner pot 10, the heat_generation | fever distribution by heating becomes high at the center part side of the bottom part 18a of the inner pot 10. As a result, the difference between the temperature at the center of the inner pot 10 and the temperature outside in the radial direction is reduced, and the temperature sensor 42 (shown in FIG. 3) disposed at the center of the bottom 18a of the inner pot 10 10 temperatures can be measured accurately.

  In addition, since the heat generation distribution on the center portion side of the bottom portion 18a of the inner pot 10 is higher than the heat generation distribution on the outer side in the radial direction, the temperature sensor 42 (shown in FIG. 3) and the like are arranged at the center portion of the bottom surface 18a of the inner pot 10. Even when the induction heating coil 41 (shown in FIG. 3) cannot be arranged, the center of the bottom surface 18a of the inner pot 10 can be sufficiently heated.

  In addition, the portion surrounded by the first groove portions 31, 51 and the second groove portions 32, 52 is different from the portion surrounded by the first groove portions 31, 51 and the second groove portions 32, 52 (areas). ) And uneven irregularities are formed on the outer surface of the inner pot 10. Therefore, irregular convection occurs in the fluid in the inner pot 10 in the vicinity of the uneven portion of the inner pot 10, and the heated fluid is agitated by this convection, so that heat is evenly distributed in the inner pot 10. The entire object to be heated stored in the inner pot 10 can be heated uniformly.

  Moreover, in the rice cooker of the said structure, the induction heating coil 41 is arrange | positioned in the position which opposes the part except the temperature sensor 42 periphery vicinity of the bottom part of the rice cooker main body 1, and the curved part 18b of the trunk | drum 18 of the inner pot 10. FIG. Has been. That is, when the inner pot 10 is stored in the rice cooker body 1, the portions where the first groove portions 31 and 51 and the second groove portions 32 and 52 of the bottom portion 18a and the curved portion 18b of the inner pot 10 are formed are induction heated. The heating part is directly heated by the coil 41, and the flat part on the outer surface of the inner pot 10 where the first groove parts 31 and 51 and the second groove parts 32 and 52 are not formed becomes the non-heating part. By flattening this non-heated portion, compared to the case where irregularities due to grooves or the like are formed in the non-heated portion, the heat conduction distance is shortened, so heat conduction is not hindered and the entire inner pot 10 is It can conduct heat efficiently.

  In the said embodiment, although the 1st groove part 31 and 51 and the 2nd groove part 32 and 52 were formed in the outer surface of the inner pot 10, it is not restricted to this. For example, in addition to the first and second groove portions 31 and 32, a third groove portion having a curvature different from that of the first and second groove portions 31 and 32 at the same radial distance from the center of the inner pot 10 is formed. You may do it.

  Moreover, you may form the 1st, 2nd groove parts 31 and 32 so that a curvature may become large toward radial direction outer side. Thereby, the irregularity of the outer surface shape of the inner pot 10 surrounded by the first groove portions 31, 51 and the second groove portions 32, 52 can be enhanced, and convection instability generated in the vicinity of the uneven portion in the inner pot 10 can be improved. Regularity can be improved and the to-be-heated object accommodated in the inner pot 10 can be heated uniformly.

  In the above-described embodiment, the agitation unit including the agitation unit 11, the coupling unit 20, and the drive motor 24 is provided on the inner lid 22. However, the present invention is not limited thereto, and the agitation unit may not be provided.

  As mentioned above, although the heating cooker of this invention was demonstrated using the rice cooker which is one Embodiment, this invention is not limited to a rice cooker. For example, even if the cooking device has a dedicated menu for cooking vegetables or meat other than rice as an object to be heated, it is included in the present invention as long as the basic configuration is the same as that of the rice cooker. .

  Moreover, the heating cooker which measures the temperature with respect to the inner pot based on the temperature measured by the temperature sensor by measuring the temperature of the inner pot containing the object to be heated is also the heating cooker of the present invention. The same effects as those described above can be obtained and are included in the present invention.

  That is, the present invention and this embodiment can be summarized as follows.

The heating cooker of the present invention is
While containing a to-be-heated object, the inner pot 10 which has a magnetic body on the outer surface,
An induction heating coil 41 arranged to heat the magnetic body of the inner pot 10;
A temperature sensor 42 in contact with the center of the bottom 18a of the inner pot 10;
The inner pot 10 is formed so that the outer side is recessed in a portion facing the induction heating coil 41, and a plurality of first groove portions 31, 51 and a plurality of second groove portions 32, 52 formed so as to cross each other. Have
The unevenness formed by the first groove portions 31, 51 and the second groove portions 32, 52 is dense toward the center of the inner pot 10.

  According to the said structure, since the surface area of the center part of the inner pot 10 becomes large compared with an outer side, the heat_generation | fever distribution of the inner pot 10 becomes high toward a center part. For this reason, the difference between the temperature at the center of the inner pot 10 and the temperature outside in the radial direction is reduced, and the temperature of the inner pot 10 is accurately determined by the temperature sensor 42 arranged at the center of the bottom 18a of the inner pot 10. It can be measured.

Moreover, in the heating cooker of 2nd Embodiment,
The interval between the adjacent first groove portions 31 and 51 gradually increases from the center of the inner pot 10 toward the radially outer side, and the interval between the adjacent second groove portions 32 and 52 is as described above. It forms so that it may become large gradually toward the radial direction outer side from the center of the inner pot 10.

  According to the said embodiment, since the uneven | corrugated unevenness | corrugation is formed in the outer surface of the inner pot 10 by the 1st groove parts 31 and 51 and the 2nd groove parts 32 and 52, when the inner pot 10 is heated, the unevenness | corrugation of the inner pot 10 will be demonstrated. In the vicinity of the portion, irregular convection occurs in the fluid in the inner pot 10. Since the heated fluid is agitated by the irregular convection, heat can be evenly distributed throughout the fluid in the inner pot 10 to uniformly heat the object to be heated in the inner pot 10.

Moreover, in the heating cooker of 3rd Embodiment,
The plurality of first groove portions 31 and 51 extend from the center of the inner pot 10 while being curved radially outward in one circumferential direction, and are arranged in a plurality of first curves arranged at intervals in the circumferential direction. Formed along the
The plurality of second groove portions 32 and 52 extend while curving from the center of the inner pot 10 to the other side in the circumferential direction toward the outside in the radial direction, and a plurality of second grooves arranged at intervals in the circumferential direction. It is formed along a curve.

  According to the said embodiment, the 1st groove part 31,51 and the 2nd groove part 32,52 are formed along the 1st, 2nd curve, and the adjacent 1st groove part 31,51 and 2nd groove part 32,52 are formed. The portions surrounded by can be formed to have different shapes and areas. Thereby, the irregularity of the convection which generate | occur | produces in the uneven | corrugated | grooved part vicinity in the inner pot 10 can be improved, and the to-be-heated material accommodated in the inner pot 10 can be heated uniformly.

Moreover, in the heating cooker of 4th Embodiment,
The plurality of first groove portions 31 and 51 and the plurality of second groove portions 32 and 52 have a curvature that increases radially outward.

  According to the above embodiment, irregularity of the irregularities of the outer surface of the inner pot 10 surrounded by the first groove portions 31, 51 and the second groove portions 32, 52 can be increased, and is generated near the irregular portions in the inner pot 10. The irregularity of the convection can be increased, and the object to be heated stored in the inner pot 10 can be heated uniformly.

Moreover, in the heating cooker of the fifth embodiment,
The non-heating part which is not facing the said induction heating coil 41 of the said inner pot 10 is flat.

  According to the said embodiment, compared with the case where the unevenness | corrugation is formed in the non-heating part which is not facing the induction heating coil 41, heat conduction is not inhibited and heat conduction can be efficiently carried out to the whole inner pot 10.

DESCRIPTION OF SYMBOLS 1 Rice cooker body 2 Cover body 3 Liquid crystal operation part 4 Operation button 5 Display operation part 6 Hook button 7 Power cord 8 Locked part 9 Lock mechanism 10 Inner pan 11 Stirring unit 12 Rotating body 13A, 13B 1st, 2nd Stirring arm 15 Shaft portion 16 Flange portion 17 Handle 18 Body portion 18a Bottom portion 18b Curved portion 18c Cylindrical portion 20 Connecting portion 21 Outer lid 22 Inner lid 23 Packing 24 Drive motor 25 Locking portions 31, 51 First groove portions 32, 52 Second Groove 41 Induction heating coil 42 Temperature sensor 61, 62 Flat part

Claims (4)

While containing the object to be heated, an inner pot having a magnetic material on the outer surface,
And arranged induction heating coil to heat the magnetic material above the pot,
Comprising a <br/> temperature sensor for detecting the temperature of the bottom of the inner pot,
The inner pot has a plurality of first groove portions and a plurality of second groove portions formed so as to cross each other ,
An unevenness formed by the plurality of first groove portions and the plurality of second groove portions is dense toward the center of the inner pot . The heating cooker according to claim 1, wherein
It said plurality of first groove portions and the plurality of second groove portions, the cooking device, characterized in that it is formed such that the outer is recessed at a portion facing to the induction heating coil. The heating cooker according to claim 1 or 2 ,
Diameter spacing between the plurality of first groove portions adjacent gradually increases radially outward from the center of the inner pot, the spacing between the second groove of said plurality of adjacent, from the center of the inner pot It is formed so that it may become large gradually toward the direction outside. In the heating cooker according to any one of claims 1 to 3 ,
The first groove portion of the plurality extends while curving on one radially outside the circumferential direction from the center of the inner pot, and, along a plurality of first curve arranged at intervals in the circumferential direction is formed Has been
The second groove portion of the plurality extends while curving in the other circumferential direction of the radially outward from the center of the inner pot, and, along a plurality of second curve arranged at intervals in the circumferential direction A heating cooker characterized by being formed.

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