JP4051705B2 - rice cooker - Google Patents

Description

The present invention relates to a rice cooker, and more particularly, to a rice cooker having a structure that accommodates an action item to be cooked such as rice paddle.

There exists a rice cooker disclosed by patent document 1 as a conventional rice cooker. To describe the structure of this type of cooker, rice cooker body is more formed substantially cylindrical outer frame forming a barrel, the upper part of the rice cooker main body, an openable lid or lid member is provided The pan is accommodated by a substantially cylindrical pan accommodating portion formed by hanging integrally from the upper inner peripheral portion of the outer frame, and an inner frame provided to cover the lower surface opening of the pan accommodating portion. end cylindrical in outer tub portion made of a nonmagnetic material is formed, the outside tank portion is a bottomed cylindrical inner bowl that pot for accommodating an object to be cooked such as rice and water Ru housed.

Upper opening of the pot, when closing the lid, that are adapted to be closed by the inner lid assembly disposed therein.

Further, the lower side surface and the bottom surface portion opposed to the heating of the outer surface of the inner frame forming a part of the outer tub unit, that has a heating coil as a first heating means is provided for electromagnetic induction heating of the pan .

When the expected your food is generally to use etc. Rice paddle Do which is an object to be rice products action means. As was the material of Yamoji, there is also made of metal, so as not to damage the coating of the pan, made of synthetic resin is mainly used. The rice scoop used is attached to the outer wall of the rice cooker body as in Patent Document 2, or the magnet is attached to the rice paddle itself as in Patent Document 3 and sucked to the outer wall of the rice cooker body. Was. In some cases, it was left in the pan as it was.

By the way, in recent years of the rice cooker, and rice by various rice course, by a long period of time of incubation, but the smell of the rice products there was a fear that attached to the pot, in recent years, particular switch put the water in the pot Rice cookers that can be boiled and cleaned just by pressing are also available.
JP 2003-310432 A JP 2001-087147 A JP-A-11-309074

  However, the conventional rice cooker as described above is inconvenient because no means for accommodating rice paddies is provided. The rice scoop may be attached to the rice cooker body with a rice scoop container or magnet. However, if the rice scoop is exposed, there is a risk that indoor dust and germs may adhere, which is not hygienic. Nonetheless, when left in the pan, it is not hygienic to have something that has been touched by hand once with rice, and there is a risk that the heat generated during the heat retention will increase the temperature.

  In addition, when rice is fed to the bowl, the rice paddies directly touch the rice, so there is a risk that the rice will smell like the pot. In particular, cooked rice, risotto, pilaf, etc. have a strong odor, and the shampoo tends to smell.

  By the way, in the conventional rice cooker as described above, a plurality of heating means such as a lid heater and a flange heater are provided in addition to the heating coil for heating the pot, and these perform induction heating. In this case, when the plurality of induction heating means are driven at the same time, the coil and the heated object vibrate depending on the frequency, and there is a problem that an unpleasant sound can be heard.

The present invention has been made in view of the above problems, while preventing adverse effects on cooking or thermal insulation, shall be the first object is to provide a hygienically can accommodate cooker the paddle.

Furthermore, a second object is to provide a rice cooker that does not hear annoying sound even if a plurality of induction heating means are driven simultaneously.

In the rice cooker according to claim 1 of the present invention , the rice scoop can be accommodated in the rice cooker main body, and therefore it is not necessary to provide means such as a rice scoop container or a magnet. The rice scoop is housed in a different place from the cooked rice, and the second housing part is covered with the lid, so that the rice scoop is not exposed and can be housed hygienically without any problem. In addition, when the container is detachable, dirt inside the container can be easily cleaned, and induction heating is used, so that the container can be efficiently heated . In addition, while the first electromagnetic induction heating means is being driven, by not driving the second electromagnetic induction heating means, it is possible to cook rice and keep warm such as worsening of the cooked rice and drying of the rice. It is possible to prevent adverse effects.

In the rice cooker according to claim 2 of the present invention, when the temperature detection means for detecting the temperature of the container detects a temperature equal to or higher than the predetermined temperature, by stopping the driving of the second electromagnetic induction heating means, by abnormal heating, There is no risk that the container and rice paddle will become hot.

In the rice cooker according to claim 3 of the present invention, when a course for sterilizing the rice scoop is selected by the course selecting means according to the operation of the course selecting means for enabling the course selecting operation , the second action is a predetermined operation . By starting the driving of the electromagnetic induction heating means , the rice scoop can be easily sterilized and disinfected when the user likes it.

In the rice cooker according to claim 4 of the present invention, since the frequency difference between the two switching means can be operated so as not to be less than a predetermined value that becomes an audible region, even if the two electromagnetic induction heating means are driven simultaneously. No annoying audible noise due to vibration of electromagnetic induction heating means or heated object is generated.

  Since the present invention is as described above, the following effects can be obtained.

According to a rice cooker in claim 1 of the present invention, even one general paddle, it can hygienically housed. Moreover, it becomes possible to easily clean the dirt inside the container, and it is possible to efficiently heat the container . And the 2nd electromagnetic induction heating means can prevent the bad influence which it has on rice cooking and heat retention.

According to the rice cooker in claim 2 of the present invention, the rice scoop can be heated safely.

According to the rice cooker in claim 3 of the present invention, it is possible to provide an easy-to-use function that can easily sterilize and sterilize rice paddies when the user likes.

According to the rice cooker according to claim 4 of the present invention, annoying audible noise associated with the vibration of the electromagnetic induction heating means or the heated object does not occur.

  Hereinafter, preferred embodiments of the rice cooker according to the present invention will be described with reference to the accompanying drawings.

  First, based on FIG.8 and FIG.9, the structure of a common rice cooker is demonstrated. In the same figure, 1 is a rice cooker main body which becomes the outline of a rice cooker, and this rice cooker main body 1 is provided so as to cover a substantially cylindrical outer frame 2 forming a trunk portion and a lower surface opening of the outer frame 2. The bottom plate 3 is formed. A lid that can be opened and closed by a hinge spring 4 as an elastic member located at the rear portion thereof, that is, a lid body 5 is disposed on the upper portion of the rice cooker body 1. Moreover, the substantially cylindrical pan accommodating part 6 formed by hanging down integrally from the upper inner peripheral part of the outer frame 2 and the inner frame 8 provided so as to cover the lower surface opening of the pot accommodating part 6 will be described later. An outer tub portion 9 made of a non-magnetic material is formed in a bottomed cylindrical shape for storing the pot 11 to be made. A flange heater 100 made of a cord heater is provided at the upper opening of the pot accommodating portion 6 and is covered with a metal plate 101 such as an aluminum plate having good heat conduction.

  In the outer tub portion 9, a pan 11 as a bottomed cylindrical inner pot for receiving an object to be cooked such as rice or water is detachably accommodated. This pan 11 is joined to the pan body 12 as a heat conducting part mainly made of aluminum having good thermal conductivity, and from the lower side to the bottom of the outer surface of the pan body 12, and is made of a magnetic material such as magnetic stainless steel or steel plate. And a heating element 13 as an induction heating part. The reason why the heating element 13 is not provided from the center of the side surface to the upper part is to reduce the weight. In addition, an annular flange portion 14 is formed around the upper end of the pan 11 so as to extend to the outer periphery thereof, and the pan 11 is suspended by placing the flange portion 14 on the metal plate 101. It is accommodated in the pot accommodating portion 6. Therefore, the flange portion 14 has an outer shape that is equal to or larger than that of the metal plate 101 so as to cover the metal plate 101, and there is almost no gap between the upper end of the pan 11 and the pan accommodating portion 6. However, the handle part (flange part 14) of the pan 11 is made non-contact and a gap is partially formed so that steam is discharged when cooking with water attached to the outer surface of the pan. .

  The inner frame 8 constituting a part of the outer tub portion 9 is positioned to face the heating element 13 of the pan 11. Is provided with a heating coil 16 as a heating means for electromagnetically heating the pan 11. The heating coil 16 is disposed so as to maintain a substantially constant distance from the heat generating portion of the pan 11 and is formed by a plurality of strands having a diameter of 0.5 mm or less. Under the heating coil 16, at least three or more ferrites 17 are arranged in a radial direction from the center of the pan 11 so as not to leak magnetism to the outside of the rice cooker body 1. When a high-frequency current is supplied to the heating coil 16, the heating element 13 of the pan 11 is heated by the alternating magnetic field generated from the heating coil 16, and the cooked rice such as water and rice in the pan 11 and the pan 11 is heated. It is like that.

  In addition, a temperature sensor 21 serving as a pan temperature detecting means is disposed in the center of the bottom of the inner frame 8 so as to elastically contact the outer surface of the bottom of the pan 11, and detects the temperature of the pan 11. The heating temperature at the bottom of the pan 11 by 16 is mainly controlled. The temperature sensor 21 is pressed by a sensor holder 22 made of a nonmagnetic material together with the ferrite 17. By disposing the sensor holder 22 at the bottom of the inner frame 8, the heating coil 16 is also pressed, and when the current flows through the heating coil 16, the heating coil 16 is prevented from vibrating due to the current. Reference numeral 23 denotes a temperature fuse provided in the vicinity of the temperature sensor 21.

  During cooking and warming, the pan 11 is heated by the heating coil 16, but when warming, the heating coil 16 is heated and adjusted according to the temperature detected by the temperature sensor 21 in contact with the bottom of the pan 11, and the pan 11 is kept constant. It is configured to be kept at temperature. After cooking the rice, the flange heater 100 is heated until the temperature of the rice drops to the heat retaining temperature (decreasing from about 100 ° C. to about 73 ° C.) and when the temperature is stable (about 73 ° C.). By radiating heat from the metal plate 101 to the gap space, the cooling due to the intrusion of outside air from the gap is suppressed and the flange portion 14 of the pan 11 is heated. In addition, the flange portion 14 of the pan 11 is also heated during the period in which so-called hot reheating is performed in which the rice is reheated at the time of heat retention, and condensation of moisture generated by heating on the upper inner surface of the pan 11 is prevented.

  The lid body 5 is urged in the opening direction by the force of the hinge spring 4 wound around the hinge shaft 24 that is the rotation shaft thereof. Further, the hook 26 provided on the front upper side of the outer frame 2 is detachably engaged with the front portion of the lid body 5 to close the lid body 5 against the bias of the hinge spring 4. Keep in state. In addition to the hinge spring 4, a brake spring 27 is provided at the rear part of the lid 5, and the lid 5 is gently opened by using the elastic force of the brake spring 27.

  When the lid 5 is closed, the upper surface opening of the pan 11 is closed by an inner lid assembly 29 provided on the inside thereof. The inner lid assembly 29 is detachably provided on the lower surface of the lid body 5 so as to facilitate cleaning and the like. On the outer side, that is, the upper side of the inner lid assembly 29, a heat radiating plate 30, such as aluminum, that can be seen when the inner lid assembly 29 is removed is disposed. On the outer side of the radiator plate 30, that is, on the upper side, a lid heater 31 serving as a lid heating means for heating the inside of the pan 11 is provided, and the inner lid assembly 29 is warmed from the lid heater 31 via the radiator plate 30, And the inside of the pan 11 is heated. A thermistor-type lid temperature sensor (not shown) for detecting the lid temperature is provided, and the temperature of the inner lid 33 is mainly managed by the lid heater 31.

  The inner lid assembly 29 is formed of an inner lid 33 made of a metal material such as stainless steel or aluminum and an outer peripheral portion of the inner lid 33, and is made of an elastic member such as silicone rubber or fluorine rubber. The lid packing 34 is sealed by the above, and the packing base 35 for fixing the inner lid assembly 29 and the lid body 5 is constituted. The inner lid 33 and the packing base 35 are fixed by screws, welding, caulking or the like, and the intervals are fixed at equal intervals. The lid packing 34 is fixed together by the inner lid 33 and a fixing portion of the packing base 35. The lid packing 34 is configured to abut against the upper surface of the metal plate 101 with the lid 5 closed.

  On the other hand, the lid 5 has an outer lid 36 that forms an upper outer shell, and an outer lid 36 and a radiator plate 30, in addition to the radiator plate 30 that forms the lower surface of the lid 5. The outer lid cover 37 forming the skeleton of the lid body 5 is a main component. A steam port 38 for releasing steam generated in the pan 11 to the outside is detachably attached to the upper part of the lid 5.

  The front part of the outer frame 2 forming the body of the rice cooker body 1 is provided with an operation panel 41 as an operation unit that can be directly touched by a user with a finger, and dust and water are placed on the inner electronic components. Prevents adhesion. Inside the operation panel 41, there is provided a control board 42 equipped with a microcomputer (not shown) as a control component for controlling the cooking process of rice cooking and heat retention. In addition to the microcomputer, the control board 42 includes an LCD display 43, a plurality of push button switches 44, and an LED 45 as a light emitting element for displaying processes such as rice cooking, heat retention, and reserved rice cooking. Soldered together with the parts. The display 43 displays the current time, the cooking time, and the reserved cooking time using the clock function of the microcomputer in segments, and designates the selected cooking menu / course with symbols. Placed in. The switch 44 is arranged around the control board 42 so as to surround the display device 43. Then, an operation button 46 facing the switch 44 and a fixing portion 47 around the display device 43 for fixing the display device 43 are formed of, for example, a resin or the like as a support member 48 that is a single component, The support member 48 is provided so as to substantially occupy the control board 42. That is, the operation button 46 here also has a function of fixing the display device 43.

  Reference numeral 71 denotes a unit case which is a holding member for holding the control board 42. This unit case 71 is made of resin, and is fixedly attached to the inside front of the outer frame 2. Further, below the control board 42, an inverter circuit 72 that is electrically connected to the control board 42 by a cable (not shown) is provided. The inverter circuit 72 supplies a high-frequency current to the heating coil, and is configured by mounting a plurality of electronic components 74 on a heating substrate 73. Rice cooking and heat insulation heating are performed by controlling the temperature of the bottom surface, the side surface of the pan 11 and the lid body 5 by the temperature detection of the temperature sensor 21 and the lid temperature sensor by the inverter circuit 72. That is, the inverter circuit 72 receives signals from the temperature sensor 21 and the lid temperature sensor, and heats the heating coil 16, which is the first heating means, the flange heater 100, and the lid heater 31. The inverter circuit 72 is provided with an element that drives the heating coil 16. The element that drives the heating coil 16 is heated together with the oscillation of the heating coil 16. Since the element that drives the heating coil 16 has the operating temperature, it is necessary to drive it below a certain temperature, so a radiator 75 with good thermal conductivity, such as aluminum, is placed under the standing heating substrate 73. It is provided in thermal contact with the heat generating component. Further, a cooling fan 76 for removing heat from the radiator 75 and cooling is provided below or on the side of the radiator 75 so as to face the exhaust holes 77 provided in the bottom plate 3. The inverter circuit 72 is accommodated in the rice cooker body 1 but may be arranged at any position with respect to the pan 11, and the exhaust hole 77 provided at the bottom or side of the rice cooker body 1 is arranged at any position. May be. However, in recent years, there has been a demand for miniaturization of products, and the inverter circuit 72, the cooling fan 76, and the exhaust hole 77 are arranged at substantially opposite positions with the pan 11 in between.

  When cooking rice is started, the bottom and sides of the pan 11 are heated by the heating coil 16, the water temperature is kept at about 45 ° C. to 60 ° C. for 15 to 20 minutes, soaked and cooked, and then the pan 11 is heated until boiling. To do. When the bottom of the pan 11 becomes 90 ° C. or higher during the boiling heating and the temperature of the inner lid 33 is stable at 90 ° C. or higher (temperature increase rate detection), boiling is detected and boiling continuous heating with reduced heating amount is performed. It can be confirmed that the bottom of the pan 11 and the inner lid 33 are all over 90 ° C., and it is possible to accurately detect that the pan 11 has completely boiled. In addition, if either the bottom of the pan 11 or the inner lid 33 reaches a temperature that is not normally 120 ° C. or higher, it is judged abnormal and the cooking rice heating is reduced to cut, to make it uneven, or to keep warm. However, abnormal heating is prevented. In addition, although either the bottom of the pan 11 or the inner lid 33 has reached 90 ° C. or more and a predetermined time has elapsed (for example, 5 minutes), either the bottom of the pan 11 or the inner lid 33 is less than 90 ° C. If the temperature is low, it is judged that one of the sensors has deteriorated the temperature detection accuracy for some reason such as dirt, tilt, contact failure, etc. Or keep warm to prevent abnormal heating. When boiling continues, lid heating is started by the lid heater 31. The lid heating is controlled by the detected temperature of the lid temperature sensor so that the temperature of the inner lid 33 is 100 to 110 ° C. Moreover, when the bottom part of the pan 11 becomes a predetermined temperature rise, cooking is detected and the process shifts to unevenness. During unevenness, the lid temperature is controlled to prevent it from sticking, and the temperature is controlled so that the temperature of the bottom of the pan 11 is kept high (98-100 ° C.) so that the rice does not burn. After 15-20 minutes of unevenness, the process proceeds to heat insulation. Heating is performed with the heating coil 16 to heat the bottom of the pan 11 and the lower side of the pan 11, the lid heater 31 heats the inner lid 33 slightly higher than the temperature of the rice, and the side of the pan 11 is cooked with the flange heater 100. The temperature is controlled so that the soup does not dry and soot does not adhere in large quantities. The rice maintains the temperature at 70 to 76 ° C. If the two sensors are abnormally high or low even during heat retention, the abnormality is detected and abnormal heating is prevented.

  Next, the characteristic part in this invention is demonstrated, referring FIG. In the figure, the rice paddle storage unit 120 is configured as a second storage unit provided separately from the pot storage unit 6 as the first storage unit, and has a size capable of storing the rice paddle 110, An opening is formed between the accommodating portion 6 and the hinge spring 4. Therefore, when the lid 5 is closed, the opening of the rice paddle accommodating portion 120 is covered with the lid 5 together with the pot accommodating portion 6. In order to make the inside of the rice paddle accommodating portion 120 hygienic, it is preferable to provide the lid 5 with a packing that contacts the opening. In this case, the adhesion between the opening of the rice paddle accommodating portion 120 and the lid 5 is good. It is possible to prevent the intrusion of outside air containing dust and germs in the room. The rice paddle accommodating portion 120 may be provided integrally with the outer frame 2 or may be provided separately, but is preferably provided integrally with the outer frame 2 in order to configure at a low cost.

  As shown in FIG. 2, storage portion heating means 121 as second heating means is disposed on the side surface portion of the rice paddle storage portion 120. The storage portion heating means 121 is provided as a sterilization / disinfection means for sterilizing and disinfecting the rice paddle 110 stored in the rice paddle storage portion 120, and heats the water stored in the rice paddle storage portion 120 and thus the rice paddle storage portion 120. Then boil the rice paddle 110. Of course, it may be heated directly without water and sterilized by heating. As the sterilizing and disinfecting means, in addition to the container heating means 121, a means for generating ultraviolet rays and ozone may be provided, and in addition to the disinfecting and disinfecting means, an ultrasonic generating means may be provided for ultrasonic cleaning. .

  Correspondingly, as shown in FIG. 3, among the operation buttons 46 arranged on the operation panel 41 as the operation unit, the course selection button 46a as the course selection means for managing course selection is used for boiling and sanitizing rice scoops. The “cleaning 2” course is provided, and the same course is displayed on the display 43 (clean 2 on the left side of the display 43). By selecting the “cleaning 2” course by operating the course selection button 46a, the storage portion heating means 121 heats the rice paddle storage portion 120, and the rice paddle 110 is boiled and disinfected. Note that “clean 1” (“cleaning 1”) displayed on the display 43 is a dedicated course for boiling and disinfecting the pot 11 as described above.

  Reference numeral 122 denotes storage unit temperature detection means, for example, a thermistor type temperature sensor provided in contact with the bottom of the rice paddy storage unit 120. The microcomputer 42a mounted on the control board 42 is connected to the measured paddle storage unit 120. Transmit temperature information. The storage unit temperature detecting means 122 may be disposed on the side of the scooping storage unit 120, or may be disposed so as to measure the surrounding atmosphere. If the rice bran 110 is boiled when the amount of water is insufficient, the rice bran container 120 and the rice bran 110 may become hot. Depending on the material of the rice bran 110, the rice bran 110 may be deformed. In order to dispel such anxiety due to abnormal heating, when the storage unit temperature detection unit 122 detects an abnormal temperature that is, for example, a boiling temperature of 100 ° C. or higher, heating by the storage unit heating unit 121 is stopped.

  Next, the effect | action of the rice cooker in a present Example is demonstrated.

  For boiling sterilization, a sufficient amount of water is placed in advance in the rice paddy container 120. After pouring rice in a tableware such as a tea bowl, the used rice paddle 110 is stored in the rice paddle storage section 120, and the lid 5 is closed. The course selection button 46a arranged on the operation panel 41 is operated to select the “cleaning 2” course. By confirming the “cleaning 2” course, the microcomputer 42a mounted on the control board 42 drives the container heating means 121 and heats the rice paddle storage unit 120, and thus the water in the rice paddle storage unit 120, Rice paddle 110 is boiled and disinfected. The microcomputer 42a is successively transmitted with the temperature information of the scooping storage unit 120 from the storage unit temperature detection unit 122, and when the abnormal temperature is detected, the heating by the storage unit heating unit 121 is stopped. In this way, various germs and odors attached to the rice paddle 110 are removed.

  As described above, in the present embodiment, in the rice cooker provided with the rice cooker body 1 having the pot accommodating portion 6 as the first accommodating portion capable of detachably accommodating the pot 11 as the inner pot, and the lid 5, In addition to the pot accommodating portion 6, there is a rice paddle accommodating portion 120 as a second accommodating portion capable of accommodating rice scoop 110 serving as a cooked rice action means, and the lid 5 has an opening portion of the pot accommodating portion 6 and a rice scoop accommodating portion. It is configured to cover 120 openings.

  If it does in this way, since rice scoop 110 can be stored in rice cooker main part 1, it is not necessary to provide means, such as a rice scoop storage container and a magnet. The rice paddle 110 is housed in a place different from the cooked rice, and the opening of the rice paddle housing portion 120 is covered with the lid 5, so that the rice paddle 110 is not exposed and can be housed hygienically without any problem. Therefore, even a general rice paddle can be accommodated hygienically.

  In the present embodiment, a hook 26 is provided as a locking means for locking the lid 5 pivotally supported by the rice cooker body 1 to the rice cooker body 1.

  If it does in this way, since the lid 5 is closed by being locked to the rice cooker main body 1 and opened by releasing the locking, the lid 5 can be easily opened and closed. Therefore, the rice paddle 110 accommodated in the rice cooker body 1 can be easily taken out.

Further, in this embodiment, and by sterilizing Yamoji 110, it is possible to prevent the growth of bacteria. Especially, heat sterilization the paddle 110 by simply providing the yield capacity portion heating means 121, it is possible to boil, as possible out to the sterilizing unit and a simple structure. Therefore, it can be kept clean with a simple structure, and can be accommodated without leaving any odor.

In the present embodiment, and a microcomputer 42a as a control means for controlling the drive of the accommodation portion heating means 121 in response to the operation of the courses selection button 46a.

  In this way, by starting driving in accordance with the operation of the course selection button 46a, the rice paddle 110 can be easily boiled and disinfected when the user likes it. Therefore, it is possible to provide an easy-to-use function that can be easily sterilized and disinfected when the user likes it.

  Furthermore, in the present embodiment, a storage unit temperature detection unit 122 is provided as a storage unit temperature detection unit that detects the temperature of the rice paddle storage unit 120.

  In this way, when the storage unit temperature detection unit 122 detects a temperature equal to or higher than a predetermined temperature, the driving of the storage unit heating unit 121 is stopped, so that the rice scoop storage unit 120 and the scoop 110 become high temperature due to abnormal heating. There is no fear. Therefore, the rice paddle 110 can be heated safely.

  FIG. 4 shows the configuration of the rice cooker in the present embodiment, but the configuration other than the rice paddle storage unit 120 is the same as that in the first embodiment.

  The rice paddle storage part 120 is configured as a second storage part provided separately from the pot storage part 6 as the first storage part, has a size capable of storing the rice paddle 110, and the pot storage part 6 An opening is formed between the hinge spring 4 and the hinge spring 4. The rice paddle accommodating portion 120 is made of a nonmagnetic material and is provided integrally with the outer frame 2. Reference numeral 130 denotes an inner container made of a magnetic material such as magnetic stainless steel or steel plate and having an upper opening formed therein. The inner container 130 is detachably accommodated in the rice scoop accommodation portion 120. Since the rice paddle 110 is housed in the inner container 130, the rice bowl 110 can be housed, and has a suitable size that can be detachably accommodated in the rice bowl housing portion 120. As the rice paddle 110 is accommodated, dirt may accumulate inside, but by making the inner container 130 detachable, cleaning can be easily performed. A flange portion such as the pan 11 may be provided at the opening end of the inner container 130 so that the inner container 130 is suspended in the rice paddle accommodating portion 120 in a state where the inner container 130 is suspended.

  As in the first embodiment, a second heating means is provided on the side surface portion of the rice paddle accommodating portion 120. In this embodiment, as shown in FIG. 5, a heating coil for electromagnetically heating the inner container 130 is provided. A container induction heating means 125 is provided. By causing the inner container 130 to generate heat by the alternating magnetic field generated by the container induction heating means 125, the water contained in the inner container 130 is heated, and the rice paddle 110 is boiled and disinfected.

  126 is a container temperature detecting means comprising a temperature sensor provided so as to elastically contact the bottom of the inner container 130. The microcomputer 42a mounted on the control board 42 stores the measured temperature information of the inner container 130. To communicate. The container temperature detecting means 126 is pressed by a sensor holder 127 made of a nonmagnetic material. If the rice bran 110 is boiled when the amount of water is insufficient, the inner container 130 and the rice bran 110 may become hot, and depending on the material of the rice paddle 110, the rice bran 110 may be deformed. In order to dispel such anxiety due to abnormal heating, when the container temperature detecting means 126 detects an abnormal temperature, for example, a boiling temperature of 100 ° C. or higher, heating by the container induction heating means 125 is stopped.

  Since the container induction heating means 125 heats the water in the inner container 130 by induction heating, it is possible to boil efficiently, but the first heating means for heating the pan 11 is also like the heating coil 16. Problems arise when the induction heating method is used. When the container induction heating means 125 is driven while cooking rice, that is, while the heating coil 16 is being driven, with the power supplied from the power outlet to the heating coil 16 being fixed, the change in the ratio of the induction heating power in the rated power (load) The power supplied to the heating coil 16 decreases due to fluctuations. If the timing of the power decrease is bad, there is a possibility that the cooking of the rice during cooking will be worsened. On the other hand, if the container induction heating means 125 is driven while the heating coil 16 is being driven while the heating coil 16 is being driven, the ambient temperature around the pan 11 rises, the open end of the pan 11 is affected, and the rice may be dried. There is. Thus, while the heating coil 16 for heating the pan 11 is being driven, the container induction heating means 125 is not driven, thereby preventing adverse effects on rice cooking and heat retention. In order to solve the problem related to the heat retention, a heat insulating material may be provided outside or inside the scooping container 120. In this case, since the concern at the time of heat retention is eliminated, the heating coil 16 and the container induction heating means 125 can be driven simultaneously even at the time of heat retention.

  Incidentally, when two electromagnetic induction heating coils such as the heating coil 16 and the container induction heating means 125 are oscillated, the circuit configuration is as shown in FIG. In the figure, an AC power supply 131 such as a commercial power supply is connected to the heating coil 16 and the container induction heating means 125, and supplies power to the two electromagnetic induction heating coils. 72a is an inverter circuit as a switching means provided with a switching element for driving the heating coil 16, and detects a high-frequency current supplied to the heating coil 16, and outputs a current detection signal 132 to the microcomputer 42a. On the other hand, 72b is an inverter circuit as a switching means provided with a switching element for driving the container induction heating means 125. The high frequency current supplied to the container induction heating means 125 is detected, and a current detection signal is sent to the microcomputer 42a. Outputs 133. The microcomputer 42a is supplied with output setting signals 136 and 137 for determining the heating output of the heating coil 16 and the container induction heating means 125, respectively, and current detection signals 132 as feedback signals input from the inverter circuits 72a and 72b. In response to 133, the PWM signals 132 and 133 subjected to PWM control are converted to inverter circuits 72a so that the heating outputs of the heating coil 16 and the container induction heating means 125 become the outputs determined by the output setting signals 136 and 137, respectively. , 72b is input to each switching element, and the heating output is feedback-controlled.

  When the heating coil 16 and the container induction heating means 125 are simultaneously oscillated, if the difference between the oscillation frequencies of the switching elements constituting the inverter circuits 72a and 72b is less than 20 KHz, the coil and the heated object vibrate due to the frequency, You may hear annoying sounds. Therefore, it is necessary to control each oscillation frequency so that the difference between the frequencies of the PWM signals 134 and 135 is 20 KHz or more. In this embodiment, as shown in the timing chart of FIG. 7, the frequency of the PWM signal 134 is 25 KHz and the frequency of the PWM signal 135 is 45 KHz, so the difference is 45 KHz−25 KHz = 20 KHz, which satisfies the condition. Yes. If the output setting signals 136 and 137 are the same setting values, the tuning is performed so that the difference in frequency between the PWM signals 134 and 135 is 20 KHz or more and the same output (watt) can be obtained from both electromagnetic induction heating coils. To do. That is, the pulse conduction width of the PWM signals 134 and 135 is fixed, and only the period (frequency) is changed so that the difference between the frequencies is 20 KHz or more and the total pulse conduction width per unit time is the same. For example, in FIG. 7, when the single pulse conduction width of the PWM signal 134 is 10 μs and the single pulse conduction width of the PWM signal 135 is 5 μs, the PWM signal 135 is output during one pulse output (one cycle). What is necessary is just to change a frequency so that two pulses may be output. In addition, the above control method can be used also for cooking appliances, such as a rice cooker provided with the lid heating means by electromagnetic induction heating, and the pot heating means.

  Next, the effect | action of the rice cooker in a present Example is demonstrated.

  For boiling disinfection, a sufficient amount of water is put in advance in the inner container 130 attached in the rice paddy container 120. After pouring rice in a tableware such as a tea bowl, the used rice paddle 110 is accommodated in the inner container 130 and the lid 5 is closed. The course selection button 46a arranged on the operation panel 41 is operated to select the “cleaning 2” course. When the “cleaning 2” course is determined, the microcomputer 42a drives the container induction heating means 125 by the inverter 72b to generate an alternating magnetic field. The inner container 130 generates heat due to the alternating magnetic field and boils and disinfects the rice paddle 110. When the temperature information of the inner container 130 is sequentially transmitted from the container temperature detection means 126 to the microcomputer 42a, and the abnormal temperature is detected, the drive of the inverter 72b and the container induction heating means 125 is stopped. As described above, various germs and odors attached to the rice paddle 110 are removed.

As described above, in this embodiment, the rice cooker main body 1 having the pot accommodating portion 6 as the first accommodating portion capable of detachably accommodating the pot 11 as the inner pot, the lid 5, and the pot 11 for heating the pot 11. In the rice cooker provided with the heating coil 16 serving as one electromagnetic induction heating means, separately from the pot accommodating portion 6, the rice scoop accommodating portion 120 as a second accommodating portion formed of a nonmagnetic material, and the rice porridge accommodating portion as well as a possible removably housed 120, the inner container 130 as the container having the magnetism of such a size that it can be accommodated a rice paddle 110 as an object to be cooking object action means, the induction heating of the inner container 130 by the alternating magnetic field A container induction heating means 125, which is a second electromagnetic induction heating means , is provided, and the lid 5 is configured to cover the opening of the pot accommodating portion 6 and the opening of the rice paddle accommodating portion 120.

  If it does in this way, since rice scoop 110 can be stored in rice cooker main part 1, it is not necessary to provide means, such as a rice scoop storage container and a magnet. The rice paddle 110 is housed in a place different from the cooked rice, and the opening of the rice paddle housing portion 120 is covered with the lid 5, so that the rice paddle 110 is not exposed and can be housed hygienically without any problem. Therefore, even a general rice paddle can be accommodated hygienically. In addition, by making the inner container 130 detachable, dirt inside the inner container 130 can be easily cleaned, and since induction heating is used, heating can be performed efficiently.

  In this embodiment, the container induction heating means 125 is not driven while the heating coil 16 is driven.

  In this way, while the heating coil 16 is being driven, the container induction heating means 125 is not driven, thereby adversely affecting the cooked rice and heat retention, such as worsening of the cooked rice and drying of the rice. Can be prevented.

Furthermore, in this embodiment , a container temperature detecting means 126 is provided as a temperature detecting means for detecting the temperature of the inner container 130. When the container temperature detecting means 126 detects a temperature equal to or higher than a predetermined temperature, the container induction heating means 125 is driven. Is configured to stop .

  In this way, when the container temperature detecting means 126 detects a temperature equal to or higher than the predetermined temperature, the inner container 130 and the rice paddle 110 may be heated by abnormal heating by stopping the driving of the container induction heating means 125. Absent. Therefore, the rice paddle 110 can be heated safely.

Further, in this embodiment, a course selection button 46a as a course selection means for enabling a course selection operation, and a control means for controlling the driving of the container induction heating means 125 according to the operation of the course selection button 46a. And a microcomputer 42a. When a course for sterilizing the rice paddle 110 is selected by the course selection button 46a, driving of the container induction heating means 125 is started .

In this manner, when the course for sterilizing the rice paddle 110 is selected by the course selection button 46a in accordance with the operation of the course selection button 46a enabling the course selection operation, the driving of the container induction heating means 125 is started. Thus, the rice paddle 110 can be easily sterilized and disinfected when the user likes it. Therefore, it is possible to provide an easy-to-use function that can be easily sterilized and disinfected when the user likes it.

Further, in this embodiment, in the rice cooker provided with the heating coil 16 as the first electromagnetic induction heating means for heating the inner pot with the alternating magnetic field and the container induction heating means 125 as the second electromagnetic induction heating means, the heating coil Switching operation is performed by separating the pulse frequency of the switching element constituting the inverter 72a as the switching means for energizing 16 and the pulse frequency of the switching element constituting the inverter 72b as the switching means for energizing the vessel induction heating means 125 by 20 KHz or more. It is configured as follows.

  In this way, the switching operation can be performed so that the difference between the two pulse frequencies does not become less than 20 KHz, which is the audible range, so even if the two induction heating means are driven at the same time, the coil and the heated object will vibrate. No annoying audible noise is generated.

  In addition, this invention is not limited to the said Example, It can change in the range which does not deviate from the meaning of this invention. The position of the rice scoop accommodation unit 120 may be provided anywhere in the rice cooker body, and a lid that covers only the rice scoop accommodation unit 120 may be provided separately from the lid 5.

It is a perspective view of the rice cooker in 1st Example of this invention. It is a partially notched longitudinal cross-sectional view of the rice scoop accommodation part which comprises a rice cooker same as the above. It is explanatory drawing of the operation panel which comprises a rice cooker same as the above. It is a perspective view of the rice cooker in 2nd Example of this invention. It is a partially notched longitudinal cross-sectional view of the rice scoop accommodation part which comprises a rice cooker same as the above. It is a block diagram of the electromagnetic induction heating means which comprises a rice cooker same as the above. It is a timing diagram which shows the control signal of the electromagnetic induction heating means which comprises a rice cooker same as the above. It is a perspective view which shows the structure of a common rice cooker same as the above. It is a principal part longitudinal cross-sectional view which shows the structure of a common rice cooker same as the above.

Explanation of symbols

1 Rice cooker body (main body)
5 Lid 6 Pan storage part (first storage part)
11 Pot
16 Heating coil (first electromagnetic induction heating means )
42a Microcomputer (control means)
46a Course selection button ( course selection means)
72a Inverter (switching means)
72b Inverter (switching means)
110 Rice paddle
120 Rice scoop storage part (second storage part )
125 Container induction heating means ( second electromagnetic induction heating means)
126 Container temperature detection means ( temperature detection means)
130 Inner container (container)

Claims (4)

In a rice cooker comprising a main body having a first accommodating portion capable of accommodating a pan, a lid, and a first electromagnetic induction heating means for heating the pan, aside from the first accommodating portion, non- A second container formed of a magnetic material, a container having magnetism that can be stored in the second container, and capable of accommodating a scoop , and provided on a side surface of the second container . and a second electromagnetic induction heating means for heating the container, the lid is all SANYO covering the said second housing part and the first housing portion, said first electromagnetic induction heating means While being driven , the rice cooker is characterized in that the second electromagnetic induction heating means is not driven . A temperature detection means for detecting the temperature of the container is provided , and when the temperature detection means detects a temperature equal to or higher than a predetermined temperature, the driving of the second electromagnetic induction heating means is stopped. Item 1. A rice cooker according to item 1 . A course selection means for enabling the course of the selection operation, in response to the operation of the course selection means, and control means for controlling a predetermined operation, when by the course selecting unit for selecting a course for sterilizing said rice paddle , rice cooker according to claim 1 or claim 2, wherein it has a structure for starting the driving of the second electromagnetic induction heating means. And frequency switching means for energizing the previous SL first electromagnetic induction heating means, characterized by being configured to operate closer than a predetermined value and the frequency of the switching means for energizing said second electromagnetic induction heating means The rice cooker of any one of Claim 1 thru | or 3 .

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