JP6735442B2 - Heating stirring cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heating and stirring cooker including a stirring body for stirring an object to be cooked contained in a container to be heated. More specifically, the present invention relates to a heating and stirring cooker provided with a stirring body that is disposed inside a container and that is rotated by receiving a rotating magnetic field from the outside of the container.

BACKGROUND ART Conventionally, as a heating and stirring cooker having a stirring body for stirring an object to be cooked contained in a container to be heated, a stirring body of a stirring body rotatably provided in a pot for cooking rice to be heated is used. An electric rice cooker has been proposed in which a rotating magnetic field of a rice cooker main body generates a rotating magnetic field with respect to a driving side magnet, and a stirring body is rotationally driven by a magnetic coupling in a non-contact manner (for example, refer to Patent Document 1).

Further, there has been proposed a rotary heating cooker that heats a pot placed on the upper side by a magnetic field generated from a coil provided in an induction heating cooker and rotates a rotary blade having a permanent magnet or a magnetized body ( See, for example, Patent Document 2).

According to Patent Document 1, since the rotary drive device for rotationally driving the agitator does not need to penetrate the pan for cooking rice, the heated object is agitated without fear of water leakage from the penetration point. Has become.

According to Patent Document 2, the object to be cooked does not burn even if it is not regularly stirred with a rice scoop, etc., and can be used in combination with other rotary cookers, and the rotary heating cooker requires less storage space for the equipment. The purpose is to provide. FIG. 13 shows a conventional rotary heating cooker described in Patent Document 2, in which a coil 104 divided into a plurality of parts connected to an inverter 103 housed in a main body 101 is subjected to a high frequency magnetic field according to the output of the inverter 103. Alternatively, a pan 105 made of a non-magnetic metal that generates a low-frequency magnetic field or a mixed magnetic field thereof and has a rotor 106 having a magnet 106 inside is placed on the upper part of the coil 104 to heat and rotate the pan 105. Both of the rotation of the wing 107 are performed.

JP, 2011-229612, A JP-A-8-35664

However, in such a structure in which power is transmitted by a rotating magnetic field, the degree of magnetic coupling generally decreases as the magnetic gap (gap length) becomes wider. On the other hand, a wide magnetic gap exists between the coil provided in the induction heating cooker and the permanent magnet provided in the rotary blade, because the thickness of the placing plate on which the pot is placed and the thickness of the pot are present. Actually, this magnetic gap is about 5 mm to 15 mm, and it is generated from the coil of the induction heating device in order to secure a large rotation torque for stirring the food to be cooked in the pan (for example, boiling of several dishes of curry). It is necessary to have a configuration in which the generated magnetic flux and the magnetic flux formed by the rotary blade sufficiently interlink.

Further, in a configuration for generating a rotating magnetic field, an inverter for switching the output frequency between the high frequency magnetic field and the low frequency magnetic field and generating a mixed magnetic field when the rotating magnetic field is to be generated by also using the coil for induction heating the pan. And the devices and power supplies associated with its control are complicated and complicated. On the other hand, in the method of generating a rotating magnetic field by rotating the permanent magnet, for example, a configuration in which the permanent magnet is rotated by a motor can be considered. On the other hand, in the configuration that uses a permanent magnet as the rotating magnetic field generation unit, a magnetic field with a high magnetic flux density is constantly generated, so especially when handling the cooker with the pan removed, do not allow magnetic metal etc. to approach. It is necessary to pay attention, and it has been a problem to suppress the influence of the magnetic field generated in order to realize a configuration in which power is transmitted in a contactless manner by magnetic force.

The present invention is to solve the above-mentioned conventional problems, while applying a rotating magnetic field from the outside of the container to the stirring body that stirs the food to be stored in the container, while realizing high torque power transmission in a non-contact manner. An object of the present invention is to provide a heating and stirring cooker which can prevent attraction and adsorption of a magnetic metal approaching the rotating magnetic field generating portion when the stirring body is not attached and which is excellent in usability.

In order to solve the conventional problems, the heating stirring cooker of the present invention,
A container having a bottom portion and a side wall portion capable of accommodating an object to be cooked, and receiving heat from the outside to generate heat; and a storage container for storing the container,
A heating means provided in the storage container to heat the container,
Along with being detachably arranged with respect to the container, a stirring body for stirring the food to be cooked in the container,
The stirring body,
A blade portion that stirs the food by rotating the stirring body,
A permanent magnet that is arranged so as to face the inner bottom portion of the container when the agitator is housed in the container, and that can receive a rotating magnetic field from the outside,
A storage portion that stores the permanent magnets while forming the vane portion on the periphery,
Equipped with
The receiving container is provided with a rotating magnetic field generating section that generates a rotating magnetic field to the permanent magnet arrangement on the agitator in the vessel,
The rotating magnetic field generating unit is configured such that its position can be changed so as to approach the stirring body when the stirring body is mounted on the container housed in the storage container.

As a result, when the agitator is attached to the container stored in the storage container, the rotating magnetic field approaches the agitator to agitate the food in the container, and the agitator rotates when the agitator is not attached. The position of the rotating magnetic field generator is changed so as to prevent the object (especially magnetic metal) from approaching or adsorbing to the magnetic field generator, so the heating and stirring cooker can be used without a stirrer when cleaning the cooker. The usability can be improved even in the case of handling.

The heating/stirring cooker of the present invention has a configuration in which a rotating magnetic field is applied to the stirring body that stirs the food to be stored in the container from the outside of the container to transmit power in a non-contact manner. Generates a rotating magnetic field so that the rotating magnetic field effectively approaches with the stirrer attached, and prevents the object (especially magnetic metal) from approaching and adsorbing to the rotating magnetic field generator without the stirrer attached Since the positions of the parts are changed, the usability can be improved even when the heating/stirring cooker is handled without a stirring body attached, such as when cleaning the cooker.

The perspective view which shows the heating stirring cooker in Embodiment 1 of this invention. The top view which shows the state which removed the cover of the heating stirring cooker in Embodiment 1 of this invention. The sectional view on the AA line of FIG. 2 which shows the heating stirring cooker in Embodiment 1 of the present invention. FIG. 3 is an enlarged cross-sectional view of a main part of FIG. 3 showing a heating and stirring cooker according to Embodiment 1 of the present invention. The principal part expanded sectional view for demonstrating operation|movement of the heating stirring cooker in Embodiment 1 of this invention. The top view, the side view, and the rear view which show the principal part of the stirring body in Embodiment 1 of this invention. The exploded perspective view seen from the lower surface side of the stirring body in Embodiment 1 of this invention, and the exploded perspective view seen from the upper surface side. Sectional drawing for demonstrating operation|movement of the stirring body in Embodiment 1 of this invention. Sectional drawing for demonstrating operation|movement of the stirring body in Embodiment 1 of this invention. Sectional drawing for demonstrating operation|movement of the stirring body in Embodiment 1 of this invention. Sectional drawing for demonstrating operation|movement of the stirring body in Embodiment 1 of this invention. Sectional drawing for demonstrating the magnetic field of the apparatus side permanent magnet in Embodiment 1 of this invention. A schematic cross-sectional view of a main part showing a conventional rotary heating cooker

The heating stirring cooker of the first invention is
A container having an inner bottom portion and a side wall portion capable of accommodating an object to be cooked, and receiving heat from outside to generate heat;
A storage container for storing the container,
A heating means provided in the storage container to heat the container,
Along with being detachably arranged with respect to the container, a stirring body for stirring the food to be cooked in the container,
The stirring body,
A blade portion that stirs the food by rotating the stirring body,
A permanent magnet that is arranged so as to face the inner bottom portion of the container when the agitator is housed in the container, and that can receive a rotating magnetic field from the outside,
A storage portion that stores the permanent magnets while forming the vane portion on the periphery,
Equipped with
The receiving container is provided with a rotating magnetic field generating section that generates a rotating magnetic field to the permanent magnet arrangement on the agitator in the vessel,
The rotating magnetic field generating unit is configured such that its position can be changed so as to approach the stirring body when the stirring body is mounted on the container housed in the storage container.

As a result, when the agitator is attached to the container stored in the storage container, the rotating magnetic field approaches the agitator to agitate the food in the container, and the agitator rotates when the agitator is not attached. The position of the rotating magnetic field generator is changed so as to prevent the object (especially magnetic metal) from approaching or adsorbing to the magnetic field generator. The usability can be improved even in the case of handling.

The heating and stirring cooker of the second invention is, in particular, in the first invention,
The rotating magnetic field generation unit,
It is configured such that it is attracted by the magnetic force of a permanent magnet provided in the agitator attached to the container and approaches toward the agitator.

As a result, a simple structure can be realized without the need for detecting means for detecting whether special power or a stirring member is attached in the structure for changing the position of the rotating magnetic field generating unit.

The heating and stirring cooker according to the third invention is, in particular, in the second invention,
The rotating magnetic field generation unit,
A device-side magnet that interlinks with the magnetic field of the permanent magnet in the storage portion,
A coupling portion that movably accommodates the device-side magnet,
A drive motor for rotating the coupling portion,
Control means for controlling the rotation of the drive motor,
Equipped with
The apparatus-side magnet is configured to be attracted by the magnetic force of the permanent magnet provided in the agitator and to approach the agitator in the coupling portion.

As a result, the permanent magnet provided in the stirring body is attracted so that the rotating magnetic field effectively acts in a state where the stirring body is attached to the container housed in the storage container, and the device-side magnet approaches and the non-contact high torque While the power transmission is realized, the position of the device-side magnet is changed by the coupling part so as to prevent the object (especially magnetic metal) from approaching or adsorbing to the rotating magnetic field generating part when the stirring body is not attached. The usability can be improved even in the case where the heating and stirring cooker is handled without attaching the stirring body such as when cleaning the cooking vessel. That is, by moving the device-side magnet to the inside of the coupling portion, it is possible to realize a configuration in which the amount of the magnetic field leaking to the outside of the coupling part of the device-side magnet is reduced. Further, the device-side magnet approaches the magnetic force of the permanent magnet of the agitator and is attracted to the specified gap size, so that stable power can be transmitted.

Embodiments of the present invention will be described below with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
FIG. 1 is a perspective view showing a heating and stirring cooker according to a first embodiment of the present invention, and FIG. 2 is a top view showing a state of removing a lid of the heating and stirring cooker according to the first embodiment of the present invention. 3 is a sectional view taken along the line AA of FIG. 2 showing the heating and stirring cooker according to the first embodiment of the present invention. FIG. 4 is an enlarged cross-sectional view of an essential part of FIG. 3 showing the heating and stirring cooker according to the first embodiment of the present invention, and FIG. 5 illustrates the operation of the heating and stirring cooker according to the first embodiment of the present invention. FIG. FIG. 6 is a top view, a side view, and a rear view showing a main part of the stirring body according to the first embodiment of the present invention. FIG. 7 is an exploded perspective view seen from the lower surface side and an exploded perspective view seen from the upper surface side of the stirring body according to the first embodiment of the present invention. 8 to 11 are cross-sectional views for explaining the operation of the stirring body according to the first embodiment of the present invention. FIG. 12 is a cross-sectional view for explaining the magnetic field of the device-side permanent magnet in the first embodiment of the present invention.

In the figure, reference numeral 1 is a main body of a heating and stirring cooker, and inside the main body 1, a storage container 3 for housing a container 2 for cooking an object to be cooked (not shown) is provided. At the bottom of the storage container 3, there is arranged a heater unit 4 which is a heating means for contacting the bottom surface of the container 2 and transferring heat to the container 2. Above the main body 1, a lid 5 for covering the opening of the container 2 is provided. Is rotatably supported on the main body 1. The container 2 has an inner bottom portion and a side wall portion so as to be able to store an object to be cooked, and the heater portion 4 has a ring shape.

As shown in FIG. 3, reference numeral 6 denotes a storage unit 9 that stores the permanent magnet 7 and the clutch unit 8, and an agitator body in which blades 10 are formed around the storage unit 9. The stirring body 6 is detachably arranged on the inner bottom portion of the container 2 for storing the food to be cooked, and the stirring body 6 rotates to stir the food to be cooked in the container 2 by the blade portion 10. .. When the agitator 6 is housed in the container 2, the permanent magnet 7 is arranged so as to face the inner bottom of the container 2 and can receive a rotating magnetic field from the outside. This rotating magnetic field from the outside is accommodated in the main body 1 and is generated by the rotating magnetic field generating device 11 which is a rotating magnetic field generating portion located outside the bottom of the container 2 and facing the permanent magnet 7 of the stirring body 6. Is occurring. The rotating magnetic field generation device 11 includes a device-side permanent magnet 12 that interlinks with the magnetic field of the permanent magnet 7 in the storage unit 9, a coupling unit 13 that movably stores the device-side permanent magnet 12, and a coupling unit 13. The drive motor 14 is connected and rotated, and the control unit 50 is a control unit that controls the rotation of the drive motor 14. Further, since the apparatus-side permanent magnet 12 is housed in the coupling portion 13 arranged in the central opening region of the heater portion 4 so as to be movable in the vertical direction in the figure, the stirring body 6 is placed in the inner bottom portion of the container 2. When it is attached to the stirring member 6, the magnetic force of the permanent magnet 7 provided in the stirring member 6 attracts the device-side permanent magnet 12 so that the device-side permanent magnet 12 approaches the stirring member 6 side in the container 2. The magnetic gap A (see FIG. 4) is secured so that high torque can be transmitted to the stirring body 6. Further, since the apparatus-side permanent magnet 12 and the coupling portion 13 are configured to be fitted to each other at the fitting portion, when the rotational drive of the drive motor 14 is transmitted to the coupling portion 13, the coupling is performed together with the coupling portion 13. When the device-side permanent magnet 12 rotates, a rotating magnetic field is formed.

The coupling portion 13 is provided with a clearance of about 1 mm from the outer bottom surface of the container 2 through the central opening of the heater portion 4, and the spacer member 15 sandwiched between the coupling portion 13 and the outer bottom surface of the container 2 is cupped. It is attached to the upper part of the ring portion 13. When stirring the food to be cooked, a part of the inner wall portion of the container 2 has an obstruction of about 6 mm projecting toward the center of the container 2 for the purpose of exerting a stirring characteristic in an advantageous manner. The section 16 (see FIG. 2) is provided.

4 and 5, 7 is a permanent magnet and 8 is a clutch part. Both of them are stored in the storage section 9.

In FIG. 6, the permanent magnet 7 is a magnetic metal plate in which four magnetic poles are arranged in a ring shape in the order of N/S/N/S, and magnetic flux leakage is suppressed to the upper side in the storage state in the storage section 9. 17 is glued. Here, the upper side means the side opposite to the side of the storage unit 9 to which the rotating magnetic field from the outside is applied to the permanent magnet 7. An opening 18 having a linear portion of at least one side is formed in a portion of the magnetic metal plate 17 located at the center of the rotation axis.

In FIG. 7, a clutch claw portion 19 that constitutes the clutch portion 8 is fitted into the opening 18 of the magnetic metal plate 17, and the clutch claw portion 19 and the permanent magnet 7 are assembled together. The clutch claw portion 19 has a substantially cylindrical shape and is provided with a substantially trapezoidal claw portion 20 on the inner peripheral surface side. When the permanent magnet 7 has a lower base on the side receiving the external magnetic field. The width is smaller than the upper bottom. That is, the inclined surface is formed such that the width in the circumferential direction increases from the lower bottom toward the upper bottom. Further, the claw portion 20 has a convex shape protruding from the inner peripheral surface side. The permanent magnet 7 and the clutch claw portion 19 are assembled by penetrating a columnar portion 21 provided at the center of the rotation shaft in the storage portion 9, and are slidably in contact with the columnar portion 21 so as to be vertically moved and held in the rotation direction. Is configured as follows. In other words, the permanent magnet 7 is stored in the storage portion 9 so as to be movable in the height direction of the columnar portion 21. The clutch engaging portion 22 that is opposed to the clutch claw portion 19 that constitutes the clutch portion 8 is formed in a substantially cylindrical shape, and penetrates the columnar portion 21 and is arranged near the bottom position of the storage portion 9. The joining portion 22 and the columnar portion 21 are engaged with each other so as not to be displaced in the axial rotation direction. The clutch engagement portion 22 is provided with an engagement portion 23 that fits with the claw portion 20 of the clutch claw portion 19 in the storage portion 9 on the outer peripheral surface of the substantially cylindrical shape, and is provided on the inclined surface of the claw portion 20 of the clutch claw portion 19. It forms a matching inclined surface. Therefore, the engaging portion 23 is formed in a concave shape, and is formed slightly smaller than the size of the claw portion 20. Note that, as shown in FIG. 4, the tip of the columnar portion 21 is fixed to the upper fixed position portion 32 by the fastening means in a state where the permanent magnet 7 and the like are stored in the storage portion 9.

A recess is provided in a portion corresponding to the inner side of the columnar portion 21 at the center of the bottom surface rotation axis of the storage portion 9, and a bush 24 for a bearing and a shaft portion 26 having a substantially disc-shaped receiving portion 25 are assembled. (See FIG. 4). When the stirring body 6 is set in the container 2, the receiving portion 25 of the shaft portion 26 is placed on the bottom surface of the container 2, and the blade portion 10 of the stirring body 6 and the storage portion 9 are centered around the shaft portion 26. It will rotate. That is, the shaft portion 26 is in a state of being grounded and fixed to the bottom surface of the container 2, and almost no rotation operation occurs.

As shown in FIGS. 7 to 11, the clutch claw portion 19 is provided with a compression coil spring 27 so as to exert upward pressure on the clutch claw portion 19 between the clutch claw portion 19 and the bottom surface of the storage portion 9. .. In other words, the compression coil spring 27 biases the permanent magnet 7 in the housing portion 9 to the side opposite to the side to which the rotating magnetic field from the rotating magnetic field generator 11 is applied. The load of the compression coil spring 27 is set just below the upper fixed position portion 32 by pushing up the clutch claw portion 19, that is, the permanent magnet 7 and the magnetic metal plate 17 toward the upper fixed position portion 32 of the storage portion 9. In the state (see FIGS. 5 and 10), when the bottom surface of the housing 9 is placed on the metal plate of the magnetic material (for example, iron plate), the magnetic force of the permanent magnet 7 attracts the metal plate side. On the other hand, the load is set so as to apply 1.2 to 1.5 times the pressing force to the permanent magnet 7. The clutch engaging portion 22 formed in a substantially cylindrical shape has an outer periphery other than the engaging portion 23 with which the claw portion 20 of the clutch claw portion 19 engages, and the permanent magnet 7 and the magnetic metal plate 17 are directly below the upper fixed position portion 32. When the permanent magnet 7 and the magnetic metal plate 17 are located directly below the upper fixed position part 32 of the storage part 9, as shown in FIG. The claw portion 20 of the portion 19 slides and rotates while sliding on the surface of the slide portion 28. The slide portion 28 is formed continuously with the engagement portion 23.

As shown in FIG. 5, on the inner surface of the side wall in the storage portion 9, when the permanent magnet 7 moves to a position directly below the upper fixed position portion 32, at a height position facing the peripheral side surface of the permanent magnet 7, the thickness 1 A ring-shaped magnetic metal body 29 having a size of ˜3 mm is fixed and attached in the storage section 9. A clearance of 0.5 to 3 mm is provided between the ring-shaped magnetic metal body 29 and the permanent magnet 7 so as not to come into contact with the permanent magnet 7 when moving up and down and rotating in the storage section 9. There is. As shown in FIG. 4, when the permanent magnet 7 is located at the lower end of the storage part 9, there is no ring-shaped magnetic metal body 29 on the inner surface of the storage part 9 at the position facing the outer periphery of the permanent magnet 7. As shown in FIG. 5, when the permanent magnet 7 is located at the upper end of the storage portion 9, the ring-shaped magnetic metal body 29 faces the outer peripheral position of the permanent magnet 7.

As shown in FIG. 9, the inclined surface of the engaging portion 23 of the clutch engaging portion 22 that is in contact with the pawl portion 20 of the clutch pawl portion 19 is an inclined surface (A that engages mainly in the direction of rotation (right rotation direction)). )30, the inclination angle Θ1 is set to 65° to 85° with respect to the plane of rotation, and as shown in FIG. 11, the inclined surface (B) 31 on the symmetrical side (left rotation direction) is , Its inclination angle Θ2 is set to 45° to 75° with respect to the plane of rotation.

As a material for the permanent magnets 7 used in the stirring body 6 and the device-side permanent magnets 12 used in the rotating magnetic field generator 11, the device-side permanent magnets 12 generally have the strongest magnetic force in all magnets. A neodymium sintered magnet is selected, and one permanent magnet 7 is selected from a neodymium sintered magnet, a samarium cobalt magnet, an Fe-Cr-Co type magnet, or an Fe-Nd-B type bonded magnet. doing. At this time, considering the handleability when the stirring body 6 is removed from the container 2, the permanent magnet 7 has a magnet material and a magnet size that are lower than those of the apparatus-side permanent magnet 12 so as to have lower magnetic characteristics. It is set.

Next, the function of the stirring body 6 will be described.
The stirrer 6 transmits the rotating operation to the rotating field generator 11 in a non-contact manner through the thickness of the bottom of the container 2 by the rotating field generator 11 arranged outside the bottom of the container 2 in the main body 1. Is. As shown in FIG. 6, this rotating operation is performed by alternately arranging the N poles and the S poles of the permanent magnets 7 housed inside the stirring body 6 in the circumferential direction to form a ring shape, and rotating magnetic field so as to face the ring shape. The device-side permanent magnets 12 formed inside the coupling unit 13 for generating are also arranged with N poles and S poles alternately in the circumferential direction. With this configuration, the permanent magnet 7 of the stirring body 6 and the device-side permanent magnet 12 of the rotating magnetic field generator 11 are synchronized by the attraction force due to the opposing different poles and the repulsive force generated between the adjacent magnetic poles. It then rotates.

By rotating the blade portion 10 of the agitator 6, the food to be cooked is pushed out toward the side wall of the container 2, and resistance to the food to be cooked from the inner surface of the container 2 or an obstacle 16 provided on the side surface of the container 2 for the food to be cooked Due to the resistance received from the cooked object, the cooked object climbs over the blade portion 10 of the agitator 6 and thereby the cooked object is returned. In this way, by rotating the agitator 6, the food to be cooked is scattered throughout the container 2, and the inside and outside of the food to be cooked are returned to give the heat of the heater section 4 to the entire food to be cooked from the bottom of the container 2. It is possible to perform cooking with heating and stirring.

When this stirring and cooking is performed, when the stirring body 6 is attached to the bottom of the container 2, the device-side permanent magnet 12 approaches the stirring body 6 side in the container 2, and the clutch portion 8 of the stirring body 6 becomes The rotating force generated by the rotating magnetic field from the rotating magnetic field generator 11 is transmitted to the storage section 9 via the permanent magnet 7. More specifically, as shown in FIGS. 4 and 8, in the storage portion 9 of the stirring body 6, the claw portion 20 of the clutch claw portion 19 and the engagement portion 23 of the clutch engaging portion 22 are engaged, and the permanent magnet 7 is in a state of descending to the bottom position of the storage section 9. The fact that the permanent magnet 7 is in the state of descending to the bottom surface of the storage portion 9 means that the magnetic gap A between the permanent magnet 7 and the device-side permanent magnet 12 of the rotating magnetic field generator 11 is configured as shown in FIG. Since the distance is the shortest, the maximum magnetic action that can be generated between the magnets can be generated. At this time, the compression coil spring 27 is also in a contracted state, and the load for pushing up the permanent magnet 7 increases, but the magnetic attraction force between the permanent magnet 7 and the device-side permanent magnet 12 is much stronger. Therefore, the reduction from the rotation torque that can be generated only by the original magnet is small. The attraction force generated between the magnets in the present embodiment is a force of about 4.0 Kgf.

When the blade portion 10 of the stirring body 6 rotates, the rotating force of the rotating magnetic field from the apparatus-side permanent magnet 12 is synchronously transmitted to the permanent magnet 7, and the permanent magnet 7 rotates. As shown in FIG. 8, the claw portion 20 of the clutch claw portion 19 and the engagement portion 23 of the clutch engagement portion 22 are engaged with each other in the storage portion 9 of the stirring body 6, so that the rotational force of the permanent magnet 7 is increased. Is transmitted to the engaging portion 23 of the clutch engaging portion 22 via the pawl portion 20 of the clutch pawl portion 19. By applying a rotational force to the engagement portion 23, the storage portion 9 integrated with the engagement portion 23 rotates around the shaft portion 26, and the blade portion 10 formed on the outer side surface of the storage portion 9 is rotated. As a result, the stirring body 6 rotates.

When the stirring body 6 is removed from the container 2 after cooking and the stirring body 6 is rotated by the user as shown in FIG. 2, the blade portion 10 is rotated to the right. The permanent magnet 7 in the agitator 6 remains in the field due to the attractive force of the rotating magnetic field from the device-side permanent magnet 12 in the coupling portion 13 and also stays in that position. For this reason, as shown in FIG. 9 from the state where the claw portion 20 of the clutch claw portion 19 is shown in FIG. 9, a force for pushing the engaging portion 23 of the clutch engaging portion 22 in the rotational direction acts, and the claw portion 20 is engaged. Ascending along the inclined surface 30 of the joint portion 23, the lower bottom of the claw portion 20 remains on the slide portion 28 as shown in FIG. Further, at this time, the permanent magnet 7 is rotated to some extent in the rotational direction by the pressing force from the clutch claw portion 19 in the rotational direction, so that the range of the same pole with the device-side permanent magnet 12 is present. The permanent magnet 7 rises due to the repulsive force generated there.

When the permanent magnet 7 moves to the state shown in FIG. 10, the clutch portion is in an idling state in which the rotational force due to the rotating magnetic field from the rotating magnetic field generator 11 is not transmitted to the storage portion 9 via the permanent magnet 7. This is because the claw portion 20 of the clutch claw portion 19 and the engagement portion 23 of the clutch engagement portion 22 are not engaged, so that even if the permanent magnet 7 rotates, the rotational force of the permanent magnet 7 is reduced. This is because it is not transmitted to the engaging portion 23 of the clutch engaging portion 22 via the claw portion 20 of the.

When the permanent magnet 7 moves to the state shown in FIG. 10, as shown in FIG. 5, the magnetic gap B between the permanent magnet 7 and the device-side permanent magnet 12 of the rotating magnetic field generation device 11 becomes as shown in FIG. The magnetic gap A between the magnets shown in FIG. 6 increases by the height of the engaging portion 23 of the clutch engaging portion 22. In the present embodiment, the engagement height is set to about 10 mm, and the apparatus-side permanent magnet 12 is attracted by the permanent magnet 7 of the stirring body 6 in this state and held at a position close to the permanent magnet 7. 7 and the permanent magnet 12 on the apparatus side, the attraction force between the magnets will drop to about 1.0 Kgf, and the attraction force between the magnets in the agitated state can be reduced by about 75%. The load on is also significantly reduced. Therefore, the stirring body 6 can be easily removed from the container 2.

FIG. 12 illustrates the magnetic field of the apparatus-side permanent magnet 12 when the stirring body 6 is not attached to the container 2. When the stirring body 6 is removed from the inner bottom of the container 2 and the attraction force of the permanent magnet 7 ceases to act, the apparatus-side permanent magnet 12 moves to the lowered position in the coupling portion 13. As shown in the figure, in this state, the magnetic field leaking from the rotating magnetic field generator 11 to the outside can be suppressed (in the image shown by the broken line arrow). It is possible to improve usability even when the heating and stirring cooker 1 is handled.

As described above, the position of the device-side permanent magnet 12 that generates the rotating magnetic field is movably accommodated in the coupling portion 13 that is rotated by the drive motor 14. It should be noted that a configuration that changes the position including the coupling portion 13 and a configuration that further changes the position including the drive motor 14 are possible, but in that case a space is required.

As shown in FIG. 10, the removed stirring body 6 is in a state in which the permanent magnet 7 and the magnetic metal plate 17 are held immediately below the upper fixed position portion 32 in the storage portion 9, so that the stirring body 6 is removed. Even if it is placed on the sink stand of a kitchen made of magnetic metal, the thickness of the bottom of the agitator 6 and the clutch part 8 between the placed metal surface and the attraction surface of the permanent magnet 7 A spatial distance L1 that matches the engagement height is formed. By this spatial distance L1, the strength of the magnetic force reaching the bottom surface of the agitator 6 can be almost eliminated, so that the adsorption is almost to the extent that it is not adsorbed. Similarly, even in metal tableware and kitchen utensils made of magnetic metal such as forks and knives, the magnetic force of the agitator 6 almost does not cause adsorption, so the magnetic force causes the forks and knives to suddenly abruptly occur. There is no need to worry about it being adsorbed. Further, at this time, the claw portion 20 of the clutch claw portion 19 is in a state of resting on the slide portion 28 of the clutch engaging portion 22, so that it does not drop downward even when a strong impact is applied, and the storage portion 9 The attraction force from the permanent magnet 7 on the bottom surface does not return to a strong state.

In the magnetic characteristics of the permanent magnet 7 housed in the housing 9 in the stirring body 6 of the present embodiment, assuming that the permanent magnet 7 is fixed at the bottom of the housing 9, the When it is attached to a metal plate or the like, its suction force is about 3.5 Kgf, but due to the action of this clutch portion 8, the suction force is reduced to about 100 to 300 gf.

In the stirring body 6 according to the present embodiment, the surface of the permanent magnet 7 opposite to the surface attracted by the rotating magnetic field generator 11, that is, the surface corresponding to the upper side of the stirring body 6, in other words, the upper fixed position portion. As shown in FIG. 6, a magnetic metal plate 17 is attached to the permanent magnet 7 on the surface facing 32. With this configuration, even if the permanent magnet 7 is located above the stirring body 6, the magnetic flux is concentrated in the magnetic metal plate 17, and the magnetic field is hardly transmitted to the outside of the stirring body 6. No metal substance is adsorbed on the upper surface of the stirring body 6.

In addition, in the stirring body 6 of the present embodiment, as shown in FIG. 10, a ring-shaped outer periphery of the storage portion 9 is provided so that the permanent magnets 7 face each other immediately below the upper fixed position portion 32. A magnetic metal body 29 is arranged. In other words, the clutch portion 8 is in a state in which the rotational force generated by the rotating magnetic field from the rotating magnetic field generator 11 is not transmitted to the storage portion 9 via the permanent magnet 7, and the storage portion 9 that faces the peripheral side surface of the permanent magnet 7. A ring-shaped magnetic metal body 29 is arranged in the. With this configuration, the magnetic flux from the permanent magnets 7 is concentrated within the thickness of the ring-shaped magnetic metal body 29 even on the peripheral side surface of the stirring body 6, so that the magnetic field is hardly transmitted to the outside of the side surface of the stirring body 6. No metal substance is adsorbed on the side surface of the stirring body 6.

Here, in the present embodiment, the ring-shaped magnetic metal body 29 is provided only at the opposing position when the permanent magnet 7 is raised, but in consideration of the stirring torque to be set, the storage portion 9 is provided. The ring-shaped magnetic metal body 29 may be provided over the entire side surface height direction, or the ring-shaped magnetic metal body 29 may be attached to the outer periphery of the side surface of the permanent magnet 7. Further, even if the accommodating portion 9 of the stirring body 6 itself is made of non-metal or non-magnetic metal by the joining means of different materials, and the side portion and the upper fixed position portion 32 are made of magnetic metal. good.

Further, in the present embodiment, since the compression coil spring 27 is provided between the clutch claw portion 19 and the bottom surface of the storage portion 9, even if the exchange is forcibly exchanged without the clutch portion 8 acting after cooking, The permanent magnet 7 and the magnetic metal plate 17 are pushed up by the compression coil spring 27 to a position directly below the upper fixed position portion 32. The compression coil spring 27 is pressed with a force slightly larger than the attraction force generated when the magnetic metal plate is grounded on the bottom surface of the accommodating portion 9 in a state where the permanent magnet 7 and the magnetic metal plate 17 are located immediately below the upper fixed position portion 32. Since it is set so as to hang on the permanent magnet 7, the permanent magnet 7 does not fall downward even if a small impact is applied such as dropping the stirring body 6.

Again, when the stirring body 6 is set on the bottom surface of the container 2, as shown in FIG. 2, the blade portion 10 is moved rightward with the bottom surface of the storage portion 9 of the stirring body 6 grounded to the bottom surface of the container 2. When the permanent magnet 7 is rotated, the permanent magnet 7 slides in the rotation direction together with the claw portion 20 on the slide portion 28, and when the claw portion 20 engages with the inclined surface 31 of the clutch engaging portion 22, the inclined surface as shown in FIG. It slides down along 31 and the permanent magnet 7 is located at the bottom position of the housing 9 as shown in FIG. In the state of the magnetic gap B shown in FIG. 5 immediately after the stirrer 6 is set in the container 2, the attractive force by the magnetic field with the rotating magnetic field generator 11 is larger than the pressing force of the compression coil spring 27, and the permanent magnet 7 is Even when the pressing force of the compression coil spring 27 increases as it goes down toward the bottom position of the storage part 9, the attraction force between the magnets further increases due to the contraction of the magnetic gap. Due to this configuration, the permanent magnet 7 can surely descend to the bottom position of the storage portion 9 and generate a desired stirring torque.

On the other hand, the clutch portion 8 of the stirring body 6 also works during stirring during cooking.
During stirring during cooking, the type of food to be cooked (eg meat, potatoes, onions, beans, etc.), the size of the food to be cooked, the cut state of the food to be cooked (eg chopped, chopped, etc.), When the objects to be cooked are mixed by stirring, such as the amount of the objects to be cooked, if the conditions overlap, the objects to be cooked are sandwiched between the blades 10 of the agitator 6 and the inner surface of the container 2, and the agitator 6 is subjected to a rotational load. May be applied. In particular, in this embodiment, the food to be cooked is likely to be sandwiched between the baffle portion 16 on the side surface of the container 2 and the tip of the blade portion 10 of the stirring body 6 which are provided in order to favorably act the stirring characteristics.

In the case of the general configuration in which the vane portion 10 and the permanent magnet 7 are integrally fixed without forming the clutch portion 8 in the present embodiment, the stirring body 6 and the rotating magnetic field generation device 11 are When the load exceeds the rotational torque generated between them, in other words, the step-out torque at which adsorption is released, the stirring body 6 stops rotating, whereas the rotating magnetic field generator 11 continues to rotate. For this reason, since the magnets facing each other have different polarities, the magnets are switched from the state in which the magnets are in a suction relationship to the same poles, and the repulsive force acts, so that the stirring member 6 moves upward due to the repulsive force. It will be pushed up and the stirring body 6 will be in the state deviated from the rotation center. In this state, the stirring action is not restored and the original stirring function is lost.

When the above-mentioned load is applied by the clutch unit 8 of the present embodiment, the blades 10 and the accommodating unit 9 of the stirring body 6 remain in place (stop state) due to the load, but are permanently The magnet 7 rotates while being attracted to the magnetic field of the rotating magnetic field generator 11, and as shown in FIG. 9, the claw portion 20 of the clutch claw portion 19 slides up on the inclined surface 30 of the engaging portion 23, and as shown in FIG. As shown in, the lower bottom of the claw portion 20 rides on the slide portion 28 of the clutch engaging portion 22. Then, with the magnetic field attracted, the claw 20 of the clutch claw 19 rotates while sliding on the slide part 28, and when it approaches the position of the engaging part 23 again, as shown in FIG. The claw portion 20 moves down along the inclined surface 31 so as to engage with the engaging portion 23 of the clutch engaging portion 22. That is, when the above-mentioned load is applied, only the permanent magnets 7 are idle while the blades 10 and the storage 9 of the agitator 6 remain, so that the agitator 6 itself is repulsed by the repulsive force between the magnets. The original stirring function is not impaired without being pushed up and out of the center of rotation.

Here, as shown in FIG. 10, the lower bottom of the claw portion 20 of the clutch claw portion 19 moves so as to ride on the slide portion 28 of the clutch engagement portion 22, and the claw portion 20 slides on the slide portion 28. While rotating, the clutch unit 8 is in a state in which the rotational force due to the rotating magnetic field from the rotating magnetic field generator 11 is not transmitted to the storage unit 9 via the permanent magnet 7, and the blade unit 10 of the stirring body 6 and the storage unit are stored. The part 9 is put in place (stopped state) due to the load. This is because the claw portion 20 of the clutch claw portion 19 and the engagement portion 23 of the clutch engagement portion 22 are not engaged, so that even if the permanent magnet 7 rotates, the rotational force of the permanent magnet 7 is reduced. This is because it is not transmitted to the engaging portion 23 of the clutch engaging portion 22 via the claw portion 20 of the.

In addition, even when the stirring body 6 is stopped by the load of the cooking target on the blade portion 10 during stirring and the rotational force is interrupted by the clutch portion 8, the device-side permanent magnet 12 and the device-side permanent magnet 12 are connected to each other. When the magnetic field of the magnet 12 is in a repulsive position (rotation angle) relationship, the magnet 12 is lowered in the coupling portion 13, the permanent magnet 7 is raised in the storage portion 9 of the stirring body 6, and the permanent magnet 7 is raised in the raised position. When the magnetic fields of the device and each other are rotated to be attracted by the rotation, the device-side permanent magnet 12 is attracted again by the magnetic force of the permanent magnet 7 and the position is changed so as to approach the stirring body.

Further, in the present embodiment, in the clutch portion 8, the inclined surface 30 of the engaging portion 23 located on the right rotation side in the mainly rotating direction is set to 65° to 85°, so that the clutch portion 8 is formed. It is possible to suppress the decrease from the rotational torque that may occur when the above is not configured within 10%. Further, by setting the inclined surface 31 of the engaging portion 23 located on the counterclockwise rotation side, which is the symmetrical side thereof, at 45° to 75°, the stirring member 6 is loaded and the clutch portion 8 acts to cause the permanent magnet 7 to operate. Is raised and becomes idle, and when the engaging portion 23 is engaged again, the permanent magnet 7 gently descends along the inclined surface 31. With this configuration, it is possible to suppress the impact noise caused by a sudden drop due to the strong attractive force from the rotating magnetic field generator 11 and the damage to the permanent magnet 7 due to the impact.

As described above, in the present embodiment, since the material to be cooked in the heating container can be heated and agitated by the agitator, for example, even when cooking with a large load such as curry for several dishes, scooping regularly. It is possible to prevent charring without stirring. When handling the main body with the container removed for maintenance, etc., the position of the permanent magnet on the device side, which is the rotating magnetic field generator, is changed, so the effect of the generated magnetic field is reduced and handling is excellent. It is possible to provide a heated stirring cooker. Furthermore, when the stirrer is taken out of the heating container when not being stirred and handled (for example, during cleaning or storage), the magnetic field of the stirrer is changed to prevent the adsorption of many magnetic metals around the kitchen. It is possible to provide a stirrer and a heating and stirring cooker which are excellent in handleability.

By properly combining the arbitrary embodiments of the aforementioned various embodiments, the effects possessed by them can be produced. In this embodiment, when the agitator is not attached, the device-side permanent magnet is moved downward by its own weight, but the relationship between the attraction force and its own weight depends on the material and shape of the magnet used for the device-side permanent magnet. Since it is different, a self-weight correction unit may be provided so as to adjust the force relationship accordingly. For example, a configuration may be employed in which an urging spring (not shown) is provided such that a force corresponding to a part of its own weight acts on the apparatus-side permanent magnet in the upward direction. Further, the heating means is not limited to the heater but may be a heating means such as induction heating, steam, warm air, or radiant heating.

As described above, the heating/stirring cooker of the present invention transmits the power in a non-contact manner by magnetic force from the side of the storage container portion that stores the container to the stirring body mounted in the container for stirring the food to be cooked. Therefore, the structure is configured to suppress the influence of the magnetic field generated from the rotating magnetic field generating unit in the state where the container is not housed while realizing high torque during stirring. As a result, it is possible to realize a heating and stirring cooker that has an added stirring function that allows automatic stirring, so it is not only a mixer for multi-cookers and pressure cookers, but also for cooking, crushing, and kneading foodstuffs. It can also be applied to processing equipment.

2 Container 3 Storage Container 4 Heater Part 6 Stirrer 7 Permanent Magnet 8 Clutch Part 9 Storage Part 10 Blade Part 11 Rotating Magnetic Field Generator 12 Device Side Permanent Magnet 13 Coupling Part 14 Drive Motor 17 Magnetic Metal Plate 19 Clutch Claw Part 20 Claw Part 22 Clutch engagement part 23 Engagement part 27 Compression coil spring 28 Slide part 29 Magnetic metal body 30, 31 Inclined surface 50 Control part

Claims (3)

A container having a bottom portion and a side wall portion capable of accommodating an object to be cooked, and receiving heat from the outside to generate heat; and a storage container for storing the container,
A heating means provided in the storage container to heat the container,
Along with being detachably arranged with respect to the container, a stirring body for stirring the food to be cooked in the container,
The stirring body,
A blade portion that stirs the food by rotating the stirring body,
A permanent magnet that is arranged so as to face the inner bottom portion of the container when the agitator is housed in the container, and that can receive a rotating magnetic field from the outside,
A storage portion that stores the permanent magnets while forming the vane portion on the periphery,
Equipped with
The receiving container is provided with a rotating magnetic field generating section that generates a rotating magnetic field to the permanent magnet arrangement on the agitator in the vessel,
The heating and stirring cooker configured such that the position of the rotating magnetic field generation unit is changeable so as to approach the stirring body when the stirring body is mounted in the container stored in the storage container. The rotating magnetic field generation unit,
The heating/stirring cooker according to claim 1, wherein the heating/stirring cooker is configured to be attracted by a magnetic force of a permanent magnet provided in the stirring body attached to the container and approach the stirring body. The rotating magnetic field generation unit,
A device-side magnet that interlinks with the magnetic field of the permanent magnet in the storage portion,
A coupling portion that movably accommodates the device-side magnet,
A drive motor for rotating the coupling portion,
Control means for controlling the rotation of the drive motor,
Equipped with
The heating and stirring cooker according to claim 2, wherein the apparatus-side magnet is configured to be attracted by the magnetic force of the permanent magnet included in the stirring body and approach the stirring body in the coupling portion.

Images