JP6450801B2 - rice cooker - Google Patents

Description

  This embodiment relates to a rice cooker.

  In recent years, IH rice cookers have become widespread. IH is electromagnetic induction heating (Induction Heating). The IH rice cooker is a rice cooker that cooks rice by generating electromagnetic waves with an IH coil installed at the bottom, and heating the bottom of the rice cooker with the electromagnetic waves.

  A separate rice cooker is also known (Patent Document 1). In the rice cooker disclosed in Patent Document 1, a separate rice cooker is mounted on a versatile IH cooker, and the rice cooker on the rice cooker side is heated by the IH coil on the IH cooker side to cook rice. It is like that.

Utility Model Registration No. 3103627

  However, according to the rice cooker disclosed by patent document 1, the operation button of an IH cooker is exposed in the state which mounted the rice cooker on the IH cooker (refer FIG. 2 of patent document 1). Since this IH cooker is premised on versatile use, there is a possibility that an operation button unnecessary for rice cooking may be pushed in a state where the rice cooker is mounted on the IH cooker.

  This embodiment provides a top and bottom separated rice cooker with improved operability.

According to one aspect of this embodiment, cooking possible by mounting the cooker unit on IH cooker and Do Ri, fitted fitting the top Metropolitan of the IH cooking appliance with the bottom of the cooker section The combined structure is a rice cooker provided on the bottom of the rice cooker unit and the top surface of the IH cooker so that the corners of R are different in the front and rear, and the IH cooker electromagnetically induces an object to be heated. An IH coil for heating, an electric power supply coil for supplying electric power to the rice cooker part , and spaced from the electric power supply coil and the IH coil, and provided at a corner of the IH cooker, the rice cooker part being A reed switch that operates when mounted on the IH cooker, and the rice cooker unit is provided with a power receiving coil and the reed switch when the rice cooker unit is mounted on the IH cooker. Installed near the position facing Had a magnetic means, and said cooker unit on the IH cooker by fitting structure is mounted the reed switch by the magnetic means is actuated, said power receiving coil is the power supply by electromagnetic induction A rice cooker configured to receive power from a coil and to be in a state where communication between the rice cooker unit and the IH cooker is possible .

  According to the present embodiment, it is possible to provide a vertical rice cooker with improved operability.

The perspective view of the IH rice cooker which concerns on embodiment. The perspective view of the rice cooker part with which the IH rice cooker shown by FIG. 1 is provided. Sectional drawing of the rice cooker part shown by FIG. The perspective view of the IH cooker with which the IH rice cooker shown by FIG. 1 is provided. The perspective view of the state which removed the top plate of the IH cooker shown by FIG. Sectional drawing of the IH cooker shown by FIG. Sectional drawing of the IH rice cooker which concerns on embodiment. The perspective view of the bottom face of the IH rice cooker shown by FIG. The enlarged view to which the weight sensor part shown by FIG. 7 was expanded. The schematic circuit block diagram of the IH rice cooker which concerns on embodiment. It is explanatory drawing of the operation part with which the IH rice cooker which concerns on embodiment is provided, (a) Rice cooker operation part, (b) Weighing display part. The screen transition figure of the measurement display part shown by FIG.11 (b). The flowchart which shows the measurement rice cooking operation | movement of the IH rice cooker which concerns on embodiment. The flowchart which shows the measurement rice cooking operation | movement of the IH rice cooker which concerns on embodiment. The flowchart which shows the measurement rice cooking operation | movement of the IH rice cooker which concerns on embodiment. The flowchart which shows the measurement rice cooking operation | movement of the IH rice cooker which concerns on embodiment. The flowchart which shows the measurement rice cooking operation | movement of the IH rice cooker which concerns on embodiment. The flowchart which shows the weight sensor zero point adjustment operation | movement of the IH rice cooker which concerns on embodiment. The flowchart which shows the weight sensor control operation | movement of the IH rice cooker which concerns on embodiment. The flowchart which shows operation | movement of the IH cooker with which the IH rice cooker which concerns on embodiment is provided. The side view of the IH rice cooker which concerns on embodiment. The bottom view of the IH rice cooker shown by FIG. The circuit block diagram of the weight sensor with which the IH rice cooker which concerns on embodiment is provided. The circuit block diagram of the single load cell shown by FIG.

  Next, embodiments will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

  In addition, the embodiments described below exemplify apparatuses and methods for embodying the technical idea, and do not specify the material, shape, structure, arrangement, etc. of the component parts as follows. . This embodiment can be modified in various ways within the scope of the claims.

[Example of overall configuration of IH rice cooker]
FIG. 1 is a perspective view of an IH rice cooker (electromagnetic rice cooker) 1 according to an embodiment. This IH rice cooker 1 is an IH jar rice cooker that uses the rice cooking technology by IH and enables the main body and the IH part to be separated by wireless communication and power supply.

  Specifically, as shown in FIG. 1, the IH rice cooker 1 can be vertically separated into a rice cooker unit 100 and an IH cooker 200. The appearance is a jar rice cooker, but when the rice cooker unit 100 is removed, the operation unit of the IH cooker 200 appears. The IH cooker 200 side can be used alone for IH cooking, and the rice cooker unit 100 side can be easily carried to the dining table as a rice cake.

  The IH rice cooker 1 according to the embodiment includes an automatic weighing function. This makes it possible to “notify the optimal amount of water” according to the amount of rice cooked and the brand of rice, cook delicious rice at any time, and enjoy the special features of rice.

  Moreover, the IH rice cooker 1 which concerns on embodiment is equipped with the rice brand cooking function. Thereby, with respect to rice brands and rice cooking of each menu, the electric power and the time of the rice cooking process can be controlled from the temperature sensor information, and delicious rice can be cooked.

[Configuration example of rice cooker]
Hereinafter, the structure of the rice cooker part 100 is demonstrated in detail.

  FIG. 2 is a perspective view of the rice cooker unit 100 included in the IH rice cooker 1 shown in FIG. 1. As shown in FIG. 2, the rice cooker unit 100 includes a lid 100A, a rice cooker body 100B, and a bottom 100C. A rice cooker operation unit 101 for operating the rice cooker unit 100 is provided on the top surface of the lid 100A. On the front surface of the rice cooker body 100B, a weighing display unit 102 that displays the weight of rice or water is provided. The appearance of the rice cooker unit 100 has a substantially rectangular parallelepiped shape. In order to make it easy for the user to see the weighing display unit 102, it is desirable to slightly tilt the front surface of the rice cooker body 100B.

  The outer edge portion of the bottom portion 100 </ b> C has a structure that fits with the outer edge portion of the top surface of the IH cooker 200. Specifically, the casing on the rice cooker unit 100 side and the casing on the IH cooker 200 side overlap each other by about 8.5 mm. Since the installation area of the IH cooker 200 and the installation area of the rice cooker unit 100 are substantially equal, the upper and lower casings are exactly matched, the appearance is smart, and space saving can be achieved. As a device for fitting up and down, the outer edge portion of the top surface of the IH cooker 200 and the outer edge portion of the bottom portion 100C may be tapered, or R may be different between the front and rear in order to eliminate the front and rear errors.

  FIG. 3 is a cross-sectional view of the rice cooker unit 100 shown in FIG. As shown in FIG. 3, the front side of the lid portion 100A rotates in the vertical direction with a lid hinge 129 provided on the rear side as a fulcrum. A lid locking mechanism 124 is provided at a position where the lid portion 100A on the front side and the rice cooker body 100B are opposed to each other. The inner pot (rice cooker) 121 is accommodated from the upper opening of the rice cooker body 100B. A heat insulating material and a protective frame are provided around the inner hook 121, and a thermistor 131 for measuring temperature is provided at the bottom of the inner hook 121. The steam generated in the inner pot 121 is discharged to the outside through a steam cylinder 128 provided on the inner lid 127. A handle for carrying the rice cooker unit 100 is rotatably provided on the side wall of the rice cooker body 100B.

  A rice cooker operation board 126 that controls the rice cooker operation unit 101 is disposed in the vicinity of the rice cooker operation unit 101. In the vicinity of the weighing display unit 102, a weighing display substrate 123 for controlling the weighing display unit 102 is arranged. Below the weighing display board 123, an interface board 122 to which a communication terminal 112 and a power receiving coil are connected is arranged. Communication terminal 112 is a terminal for wirelessly communicating with IH cooker 200. The power receiving coil is a coil for receiving power by electromagnetic induction from the power supply coil on the IH cooker 200 side.

  In addition, although the case where the thermistor 131 was provided in the bottom of the rice cooker part 100 is illustrated here, it is not limited to this. For example, the thermistor 131 may be provided on the side surface of the rice cooker unit 100 or may be provided on the inner lid 127.

[Configuration example of IH cooker]
Hereinafter, the configuration of the IH cooker 200 will be described in detail.

  FIG. 4 is a perspective view of an IH cooker 200 provided in the IH rice cooker 1 shown in FIG. As shown in FIG. 4, the IH cooker 200 is a desktop electromagnetic cooker that is used on a table or the like, and has a thin, substantially rectangular parallelepiped shape. A top plate 200B made of crystallized glass or the like is disposed so as to close the upper opening of the IH cooker body 200A. An IH operation unit 201 having a power button, a temperature adjustment button, and the like is provided on the front side of the top surface of the IH cooker 200. The top plate 200B and the IH operation unit 201 are arranged so as not to overlap each other in plan view. On the rear side of the IH cooker 200, there is provided an insertion port for attaching a plug of a power cord detachably with a magnet.

  FIG. 5 is a perspective view of the IH cooker 200 shown in FIG. 4 with the top plate 200B removed. As shown in FIG. 5, when the top plate 200B on the IH cooker body 200A is removed, an IH coil 211, a power supply coil 212, a communication terminal 213, and a reed switch 214 appear. The IH coil 211 is a heating coil that electromagnetically heats an object to be heated. The power supply coil 212 is a coil for supplying power to the power receiving coil on the rice cooker unit 100 side by electromagnetic induction. The communication terminal 213 is a terminal for wirelessly communicating with the rice cooker unit 100. The reed switch 214 is a switch that operates when a magnet is brought close to it. The operation of these members will be described later.

  FIG. 6 is a cross-sectional view of the IH cooker 200 shown in FIG. As shown in FIG. 6, an IH coil 211 is arranged at the upper part of the center of the IH cooker body 200A. The heat generated inside the IH cooker main body 200 </ b> A is exhausted to the outside by the FAN 221. An IH operation board 224 for controlling the IH operation unit 201 is disposed on the front side of the upper portion of the IH cooker body 200A. In the vicinity thereof, a main substrate 225 for IH heating is disposed. Four pedestal portions 223 protrude from the four corners of the bottom of the IH cooker body 200A to the outer surface. The pedestal portion 223 can be attached with a weight sensor in correspondence with mold nesting.

[Configuration example of weight sensor]
Hereinafter, the configuration of the weight sensor will be described in detail.

  FIG. 7 is a cross-sectional view of the IH rice cooker 1 according to the embodiment. FIG. 8 is a perspective view of the bottom surface of the IH rice cooker 1 shown in FIG. FIG. 9 is an enlarged view of the weight sensor portion (pedestal portion 223) shown in FIG.

  As shown in FIGS. 7-9, the strain gauge 223B is provided in the base part 223 of four corners, and a weight measurement is performed. Specifically, the strain gauge 223B, the weight sensor base 223C, and the rubber feet 223D are attached to the base member 223A and fixed with the weight sensor cover 223E. When the rice cooker unit 100 is mounted on the IH cooker 200, the rubber feet 223D push up the entire weight sensor base 223C and deform the strain gauge 223B. Accordingly, the weight sensor substrate 224a (see FIG. 10) measures the weight based on the strain of each strain gauge 223B.

[Schematic circuit configuration example of rice cooker]
FIG. 10 is a schematic circuit configuration diagram of the IH rice cooker 1 according to the embodiment.

  As shown in FIG. 10, a power cord is connected to the main board 225 of the IH cooker 200 via a magnet plug 226. When the rice cooker unit 100 is mounted on the IH cooker 200, the detection magnet 111 on the rice cooker unit 100 side turns on the reed switch 214 on the IH cooker 200 side.

  In this state, the main board 225 of the IH cooker 200 applies a drive signal to the power supply coil 212 via the IH operation board 224. Thereby, a power signal is generated in the power receiving coil 113 on the rice cooker unit 100 side by electromagnetic induction action, and is applied to the weighing display board 123, the rice cooker operation board 126, and the like via the interface board 122. As a result, wireless communication such as infrared communication becomes possible via the communication terminal 213 on the IH cooker 200 side and the communication terminal 112 on the rice cooker unit 100 side.

  When the rice cooker operation unit 101 (see FIG. 2) is operated in this state, the operation signal is transmitted from the rice cooker operation board 126 to the main board 225 on the IH cooker 200 side via the communication terminals 112 and 213. . The main board 225 controls the start and stop of current supply to the IH coil 211 based on the received operation signal, and controls the current value of the high-frequency current that flows through the IH coil 211. In this control, it is possible to use the weight information of the cooked rice (rice, water, etc.) obtained from the weight sensor substrate 224a and the temperature information of the inner pot 121 obtained from the thermistor 131. The weight information can also be displayed on the weighing display unit 102 (see FIG. 2) via the weighing display substrate 123 on the rice cooker unit 100 side.

  As mentioned above, the IH rice cooker 1 which concerns on embodiment uses the rice cooking technique by IH, enables isolation | separation of the rice cooker part 100 and the IH cooker 200 by radio | wireless communication and electric power supply, and a rice with a weight sensor.・ Weigh water. Because of this automatic weighing function, you can “notify the optimal amount of water” according to the amount of rice cooked and the brand of rice, cook delicious rice at any time, and enjoy the special features of rice.

  In addition, in the state where rice cooker part 100 is not mounted in IH cooker 200, since the top of IH cooker 200 is exposed, IH operation part 201 (refer to Drawing 4) can be operated. When the IH operation unit 201 is operated, the operation signal is transmitted from the IH operation board 224 to the main board 225. That is, since the operation part 201 of the IH cooker 200 appears when the rice cooker part 100 is removed from the IH cooker 200, the IH cooker 200 side can be used alone for IH cooking.

[Example of operation unit configuration]
Drawing 11 is an explanatory view of the operation part with which IH rice cooker 1 concerning an embodiment is provided.

  Specifically, FIG. 11A shows a rice cooker operation unit 101 provided on the top surface of the rice cooker unit 100. The rice cooker operation unit 101 includes various buttons such as a menu button B1, a heat retention / cancellation button B2, a rice brand button B3, and a rice cooking button B4 in addition to the display unit D1. The display unit D1 is a display device that displays the setting status of the IH rice cooker 1 and the like. Menu button B1 is a button for selecting how to cook. The heat retention / cancellation button B2 is a button for instructing the heat retention and its cancellation. The rice brand button B3 is a button for selecting a rice brand. By pressing the rice brand button B3, brands such as Koshihikari, Akitakomachi, Tsuyahime, Yumepirika, Hitomebore, Hinohikari, etc. can be selected. The rice cooking button B4 is a button for instructing rice cooking.

  FIG. 11B shows a weighing display unit 102 provided on the front surface of the rice cooker unit 100. The weighing display unit 102 includes a weighing button B11 in addition to the display unit D11. The display unit D11 is a display device that displays measurement values and the like. The weighing button B11 is a button for instructing use of the weighing mode.

[Outline of weighing operation example]
Hereinafter, an outline of a measurement operation example will be described.

  First, the user selects menu / hardness / rice brand in the rice cooker operation unit 101, opens the lid 100 </ b> A of the rice cooker unit 100, and puts rice in the inner pot 121. Next, the weighing button B11 of the weighing display unit 102 is pressed (the weight of the rice is navigated by display), the inner pot 121 is taken out and washed, and then the inner pot 121 is set in the rice cooker unit 100. Water is put into the water (the amount of water is navigated by display and sound). Here, the measurement button B11 is pressed in order to make the user recognize the use of the measurement mode. However, when the lid 100A is opened, the measurement mode may be automatically shifted to. Finally, when the lid 100A of the rice cooker unit 100 is closed and the rice cooker button B4 of the rice cooker operation unit 101 is pressed, rice cooking is started.

[Details of weighing operation example]
FIG. 12 is a screen transition diagram of the metric display unit 102 shown in FIG.

  First, when the user puts rice into the inner pot 121 in the weighing mode, the weight of the rice is measured. Here, when the weight of the rice is not more than the specified range, as shown in FIG. 12A, the display unit D11 displays “put rice and press the weighing button” or the like (the weighing button B11 blinks). In addition, before entering the measurement mode, the zero point adjustment is performed in a state where the inner pot 121 is mounted on the rice cooker body 100B, and details will be described later. On the other hand, when the rice weight is larger than the allowable weight, an error is displayed on the display unit D11 as shown in FIG. 12B (the weighing button B11 is turned off).

  Next, when the user presses the weighing button B11, the weight of the rice is confirmed and the mode is shifted to the water weighing mode. However, if the measured rice weight is out of the specified weight range, the mode does not shift to the water weighing mode and remains in the rice weighing mode. If there is no problem, as shown in FIG. 12 (c), the display unit D11 displays "Add water (after washing)". At this time, the required amount of water is displayed on the display unit D11.

  Next, washing rice (this step is not necessary if it is unwashed rice), and adding water with a cup (not shown), the water weight is measured, as shown in FIG. The required water amount displayed on the display unit D11 decreases. When the water weight is within the optimum range, it will beep once and when it is outside the optimum range, it will beep twice. In the optimum value range, “0” or the like is displayed on the display unit D11 as shown in FIG. 12E, and when the optimum value range is passed, “water” is displayed on the display unit D11 as shown in FIG. To reduce. "

  Finally, when the lid 100A is closed, the weighing display is turned off. If rice cooking button B4 (or rice cooking button B4 after a reservation) is pushed in this state, rice cooking will be started.

[Measurement rice operation example]
13A to 13E are flowcharts showing the weighing rice cooking operation of the IH rice cooker 1.

  First, when the rice cooker unit 100 is not placed on the IH cooker 200, the rice cooker operation unit 101 only displays the time, and the weighing display unit 102 remains off (S1 → S2 → S3 → S2). When the rice cooker unit 100 is placed on the IH cooker 200, the menu display or the like of the rice cooker operation unit 101 is activated, but the weighing display unit 102 remains off (S2 → S4). At this time, the previous information on the menu, brand, and hardness is maintained (S5).

  Next, when the user presses the menu button B1, the menu selection is switched (S6 → S7 → S6). For example, (1) Wash-free rice → (2) Wash-free rice, New rice → (3) Wash-free rice, energy saving → (4) Wash-free rice, quick cooking → (5) White rice → (6) White rice, New rice → (7) White rice, Energy saving → (8) white rice, quick cooking → (9) cooking → (10) porridge → (11) brown rice → (12) stew / steaming → (1) unwashed rice →.

  Next, when the user presses the rice brand button B3, if the selection menu is not white rice or non-washed rice, the brand selection remains off (S8 → S9 → S10 → S8). On the other hand, when the selection menu is white rice or non-washed rice, the brand selection is switched (S8 → S9 → S11 → S8). For example, (0) Other → (1) Koshihikari → (2) Akitakomachi → (3) Princess Princess → (4) Yumepirika → (5) Hitomebore → (6) Hinohikari → (0) Other → It is like that.

  Next, when the user presses the hardness button, if the selection menu is not white rice or non-washed rice, the hardness selection remains off (S12 → S13 → S14 → S12). On the other hand, when the selection menu is white rice or non-washed rice, the hardness selection is switched (S12 → S13 → S15 → S12). For example, it is switched in the order of (1) standard → (2) fold → (3) soft → (1) standard →.

  Next, when the lid 100A is opened, the weight is equal to or more than the proper weight of the kettle, and the heat retention is "OFF", the weighing display is started (S16 → S18 → S20 → S24). The pot weight is a weight obtained by subtracting a predetermined value from the pot weight.

  On the other hand, if the lid 100A is not opened, the weight is not more than the proper weight of the hook, or the heat retention is not "off", the state is left as it is (S16 → S17, S18 → S19, S20 → S21). However, when the heat retention / cancellation button B2 is pressed, the weighing display is started (S21 → S22 → S24). If lid 100A is closed (S23: YES), the process returns to step S16.

  Next, when the weighing display has been left for more than 10 minutes, the weighing display is turned off unless the weighing button B11 is pressed (S25 → S26 → S27 → S26). Even if it is not left for 10 minutes or more, when the heat retention / cancel button B2 is pressed, the weighing display is turned off from the viewpoint of energy saving unless the weighing button B11 is pressed (S25 → S28 → S29 → S30 → S29). .

  On the other hand, if the weight of the rice is less than the upper limit / allowable weight of the rice cooking menu when it is left for 10 minutes or more and the heat retaining / cancellation button B2 is not pressed, "Press" is displayed (S25 → S28 → S31 → S33). When the rice weight is not less than the allowable rice weight / upper limit of the rice cooking menu, an error is displayed (S25 → S28 → S31 → S32). In this flow, the leaving time is 10 minutes, but the present invention is not limited to this.

  Next, when the rice weight is within the allowable rice weight of the rice cooking menu, the display of “put rice and press the weighing button” is maintained, and the weighing button B11 is blinked (S34 → S35). Thus, when the user presses the weighing button B11, if the weight of the rice is within the range of the allowable rice weight, the weight of the rice is stored and the optimal amount of water is displayed for the amount of rice. Specifically, a display such as a water metering mode “insert (reduce) cc water” (S36 → S37 → S38) is displayed. In addition, permissible rice weight "○ go ~ ○ go" is decided for every rice cooking menu.

  Here, when the menu is “no-wash rice”, “Add cc water” is displayed (S39 → S40). On the other hand, when the menu is other than “no-wash rice”, a message such as “add water after ◯ cc washing” is displayed (S39 → S41).

  Next, when the cancel button is not pressed and the water (+ rice) weight is not within the optimum water amount range, a beep is sounded and the rice cooking button B4 and the reservation button are turned off (S42 → S43). → S44 → S43). On the other hand, when the weight of water (+ rice) is within the optimal water amount range, a beep is sounded, the rice cooking button B4 and the reservation button blink, and if the lid 100A is closed, the weighing mode is canceled. "Time mode: 00:00" is displayed (S42 → S43 → S45 → S46 → S47). In addition, the optimal water amount range “optimum water amount ± ○%” is determined based on a combination of the rice cooking menu, brand, and hardness setting. Further, when the optimum water amount range is reached, it is desirable to prompt the user with a display or voice to close the lid 100A.

  Next, when the user presses the reservation button, it shifts to the reservation mode and displays “00:00” or the like, “reservation 1” is lit and the previous registration time is displayed (S48 → S49 → S50). Here, if the user presses the hour / minute button without pressing the cancel button or the reservation button, the registration time of reservation 1 is updated (S51 → S52 → S58 → S59). On the other hand, if the user presses the reservation button without pressing the cancel button, “Reservation 2” is lit and the previous registration time is displayed, and if the user presses the hour / minute button without pressing the reservation button, The registration time of reservation 2 is updated (S51 → S52 → S53 → S54 → S56 → S57). If the user presses the reservation button in step S54, the reservation mode is canceled and “time mode: 00:00” or the like is displayed (S54 → S55).

  Finally, when the user presses the rice cooking button B4, when the lid 100A is closed, rice cooking is started in the selected rice cooking menu / brand course (S60 → S61 → S62). Then, if cooking rice is completed, heat insulation will be started (S63) and it will return to Step S16.

[Example of weight sensor zero point adjustment]
FIG. 14 is a flowchart showing the weight sensor zero point adjustment operation.

  First, when the lid 100A is not open, it is left as it is (S71 → S72). On the other hand, when the lid 100A is open and the user presses and holds the weighing button B11, if the weight is within the proper range of the shuttle weight, the zero point adjustment is started and the mode shifts to the rice weighing mode. (S71 → S73 → S74 → S75 → S76). The appropriate range of the weight of the hook is determined based on the weight of the hook.

[Weight sensor control operation example]
FIG. 15 is a flowchart showing the weight sensor control operation.

  First, the sensor values of four weight sensors (strain gauges) are measured, and the values for a certain time are averaged based on the following formula (S81 → S82).

Sensor output average (voltage) = average (sensor output ALL (voltage))
Next, the output voltage is converted into a load (weight) based on the following equation (S83). The strain gauge coefficient is determined by actual inspection and experiment.

Measured value [g] = (sensor output average (voltage)) / (strain gauge coefficient [voltage / N]) / g (gravity acceleration [m / s ^ 2])
Next, the measured weight is calculated based on the following equation (S84).

Weighed weight [g] = Measured value [g] −Zero point weight [g]
At this time, in the rice weighing mode, the weight of rice is recorded in units of g (S85 → S86). On the other hand, in the water metering mode, the water weight is output in units of cc based on the following equation (S87 → S88).

Output value [cc] = (required amount of water [cc] calculated from recorded rice weight / rice brand, etc.) − ((Weighed weight [g]) − (recorded rice weight [g]))
[IH cooking operation example]
FIG. 16 is a flowchart showing the operation of the IH cooker 200.

  First, when the rice cooker unit 100 is placed on the IH cooker 200, the display of the IH operation unit 201 is turned off (S91 → S92 → S93 → S92). Further, even when the rice cooker unit 100 is not placed on the IH cooker 200, the display of the IH operation unit 201 is turned off until the user presses the “heating start” or “fried food start” button 201a or 201b. (S94 → S95 → S92).

  Next, when the user presses the “start heating” or “start fried food” button 201a or 201b, heating is started with the lowest heating power (S94 → S96). The reason for starting heating with the lowest heating power is to prevent inadvertent temperature rise and ensure safety. When the user presses the “strong” button 201c, the heating power is increased accordingly (S97 → S98), and when the user presses the “weak” button 201d, the heating power is decreased accordingly (S99 → S100). . Finally, when the user presses the “OFF” button 201e, the power is reduced (S101 → S102).

[About the brand and taste of rice]
Hereinafter, the relationship between rice brands and taste will be described.

  The brands “Koshihikari”, “Hinohikari” and “Akitakomachi” have relatively good taste and the hardness of rice belongs to a relatively hard category. The brands "Yumepirika", "Mori no Kuma-san", "Hitomebore", and "Tsuyahime" are relatively tight in terms of taste and the hardness of rice belongs to a relatively soft category. The brands “Nanatsuboshi”, “Haenuki”, and “Mashigura” are relatively light in terms of taste and the hardness of rice belongs to a relatively hard category. In addition, the brand “Sasanishiki” is relatively light in terms of taste, and the hardness of rice belongs to a relatively soft category.

  Thus, since the taste and physical properties differ depending on the brand of rice, the main board 225 of the IH cooker 200 is used in the cooking process according to the brand of rice selected by the rice brand button B3 of the rice cooker operation unit 101. The amount of heat (electric power) to be applied is calculated, and the IH coil 211 and the like are controlled based on the calculated amount of heat. Thereby, cooking for every brand can be performed accurately.

  As described above, the IH rice cooker 1 according to the embodiment is the IH rice cooker 1 that can cook rice by mounting the rice cooker unit 100 on the IH cooker 200. The IH cooker 200 includes an IH coil 211 that electromagnetically heats an object to be heated, and an IH operation unit 201 that is an operation unit of the IH cooker 200. The rice cooker unit 100 includes an inner pot 121 that accommodates the cooked rice, and a rice cooker operation unit 101 that is an operation unit of the rice cooker unit 100. The IH operation unit 201 is covered with the rice cooker unit 100 in a state where the rice cooker unit 100 is mounted on the IH cooker 200. Thereby, since the IH operation part 201 cannot be operated in the state which mounted the rice cooker part 100 on the IH cooker 200, an operation mistake is prevented and operativity can be improved. Moreover, according to the structure by which the IH operation part 201 is covered with the rice cooker part 100 in this way, it is possible to increase the amount of rice cooking although the installation area of the rice cooker part 100 is small. When the top and bottom are separated, the IH cooker 200 side can be used alone for IH cooking, and the rice cooker unit 100 side can be easily carried to the table as a rice cake.

  Moreover, the structure which provides the IH operation part 201 in the top | upper surface of the IH cooker 200, and the outer edge part of the top | upper surface of the IH cooker 200 and the outer edge part of the bottom face of the rice cooker part 100 may be sufficient. That is, since the installation area of the IH cooker 200 and the installation area of the rice cooker unit 100 are substantially equal, the upper and lower casings are exactly the same, the appearance is smart, and space saving can be achieved.

  The IH rice cooker 1 according to the embodiment includes an automatic weighing function. This makes it possible to “notify the optimal amount of water” according to the amount of rice cooked and the brand of rice, cook delicious rice at any time, and enjoy the special features of rice. Specifically, a weight sensor that measures the weight of the cooked rice accommodated in the inner pot 121 may be provided.

  Further, a weight sensor may be provided on the IH cooker 200 side. Thereby, the space by the side of the rice cooker part 100 is securable.

  Moreover, a weight sensor may be provided in the four corners of the bottom face of the IH cooker 200, and the weight of the cooked rice may be calculated by averaging the sensor values of the weight sensors at the four corners. Thereby, even when the installation place of the IH rice cooker 1 is inclined, the sensor values of the weight sensors at the four corners can be averaged, so that the measurement accuracy can be further improved.

  Moreover, electric power may be supplied from the IH cooker 200 to the rice cooker unit 100 by a non-contact power feeding method. Thereby, since it is not necessary to connect a power cord etc. to the rice cooker part 100, it is easy to remove the rice cooker part 100 and to carry as a rice cake.

  Moreover, the thermistor 131 which measures the temperature of the inner pot 121 may be provided, and the temperature of the inner pot 121 may be transmitted from the rice cooker unit 100 to the IH cooker 200 by infrared rays. Thereby, since infrared rays are not influenced by IH, the temperature of the inner pot 121 can be transmitted with high accuracy.

  Further, an inclined portion may be provided on the front surface of the rice cooker portion 100, and a weighing display portion 102 for displaying the weight measured by the weight sensor may be provided on the inclined portion. Thereby, since the measurement display part 102 becomes easy to see from a user, it becomes possible to provide the IH rice cooker 1 which is more convenient.

  Moreover, the IH rice cooker 1 which concerns on embodiment is equipped with a brand cooking function. Thereby, with respect to rice brands and rice cooking of each menu, the electric power and the time of the rice cooking process can be controlled from the temperature sensor information, and delicious rice can be cooked.

  Moreover, although the IH rice cooker 1 which concerns on this Embodiment is equipped with a measurement function, even if it is an IH rice cooker which does not have a measurement function, the total determination of the rice to cook according to each rice cooking mode You may provide the control which performs. Thereby, according to each rice cooking mode (including rice cooking modes, such as cooking and rice crackers) and the total number of rice, optimal cooking can be ensured.

  As described above, according to the present embodiment, it is possible to provide a vertically separated IH rice cooker 1 with improved operability.

[Relationship of weight detection legs to the center of gravity of rice cooker]
By the way, in order to cook delicious rice with a rice cooker, it is important to input an optimal amount of water with respect to the total number (weight) of rice. For this reason, it is necessary to use a weight sensor having high detection accuracy (specifically, having accuracy in the order of grams).

  When actually trying to adjust the amount of water accurately in a rice cooker, it takes time to close the lid and measure the weight, and the operability becomes troublesome. In such a case, it is desirable to measure the weight with the lid open.

  However, when the lid is opened, the weight of the lid moves upward. If it does so, since the gravity center of a rice cooker will move upwards compared with the state where a lid was closed, it will become unstable easily. In order to suppress the wobbling and instability due to such an operation, it is preferable to provide many legs. In particular, since the hinge side is easily affected, at least two legs should be provided. Furthermore, if not only the front-rear direction and the front-rear direction of the rice cooker but also the right-and-left wobbling (instability) perpendicular to each other can be suppressed, stable weight measurement can be performed.

  In addition, a weight sensor is used to detect the weight, but a rice cooker, a cooking device, etc. that also use the leg as a weight detection leg have been applied for a patent (for example, Japanese Patent No. 5223191). Japanese Patent No. 5223191 is an arrangement of weight detection legs with respect to the center of gravity position of a rice cooker for the purpose of achieving both improvement in weight detection accuracy with the lid closed and improvement in stability with the lid open. It defines the relationship.

  However, Japanese Patent No. 5223191 is for measuring the weight of the contents with the lid closed, and is based on the premise that the weight is measured in a stable state. That is, no consideration is given to measuring the weight in an unstable state with the lid open.

  Therefore, the present embodiment provides a rice cooker that can achieve highly accurate gravimetric weight measurement even when the lid is opened.

(Implementation technology)
If the weight can be measured with one weight detection leg, it is ideal in terms of cost / design. However, for example, if the installation surface is uneven and the weight detection leg is located at that position, the weight detection leg may float from the installation surface, and weight measurement may not be possible.

  If there are at least three legs, the main body stability can be basically obtained. However, with three legs, the rice cooker body becomes weaker with respect to stability, particularly in the left-right direction, when the lid is opened or with the lid opened. In addition, when one of them is used as a weight detection leg, the same problem as described above occurs, so two or more weight detection legs are required.

  To eliminate these instability factors, use four or more legs. By doing so, it is possible to suppress wobbling / unstableness in the front-rear and left-right directions, particularly in the left-right direction, as compared with three legs. If four of them are used as weight detection legs (especially if at least two weight detection legs are provided on the hinge side), the weight detection legs are temporarily installed while absorbing the wobbling / unstableness when the lid is opened. The weight measurement can be covered with the remaining weight detection legs even if it is away from the surface. This makes it possible to achieve highly accurate weight measurement on the order of grams even when the lid is open.

(Example of weight measurement configuration)
FIG. 17 is a side view of the IH rice cooker 1 according to the embodiment. When the lock by the lid lock mechanism 124 (see FIG. 3) is released, the front side of the lid portion 100A is rotated upward with the rotation shaft 129a of the lid hinge 129 as a fulcrum, and is stationary in a substantially vertical state. . Let G be the center of gravity of the IH rice cooker 1 with the lid 100A opened.

  FIG. 18 is a bottom view of the IH rice cooker 1 shown in FIG. Here, the case where the four base parts 223 are provided in the four corners of the bottom part of the IH rice cooker 1 is illustrated. Weight sensors are attached to all of the four pedestals 223. In the following description, the pedestal portion 223 is referred to as a weight detection leg 223. Further, when distinguishing the four weight detection legs 223, they are referred to as weight detection legs 223A, 223B, 223C, and 223D.

  As shown in FIG. 18, the two weight detection legs 223 </ b> C and 223 </ b> D are located at both ends with respect to the center of gravity G and on the lid hinge 129 side with respect to the rotation axis 129 a direction. On the other hand, the two weight detection legs 223A and 223B are positioned at both ends with respect to the center of gravity G on the opposite side of the lid hinge 129 with respect to the direction of the rotation shaft 129a. Let L1 and L2 be the two virtual diagonals of the quadrangle formed by the weight detection legs 223A, 223B, 223C, and 223D, and let P be the intersection of the two virtual diagonals L1 and L2. In this case, it is desirable that the center of gravity G is closer to the lid hinge 129 than the intersection P between the two virtual diagonal lines L1 and L2.

  Specifically, a triangular area formed by the intersection point P and the weight detection legs 223A and 223B is referred to as “area E1”. When the center of gravity G is inside the region E1, it is likely to be affected by the vibration of the rice due to the bias of the rice and the addition of water, and it is likely to wobble in the front-rear direction.

  Further, a triangular area formed by the intersection point P and the weight detection legs 223B and 223C is referred to as “area E2”. When the center of gravity G is inside the region E2, the left and right directions are likely to fluctuate when the lid 100A is opened or when the lid 100A is opened.

  Further, a triangular area formed by the intersection point P and the weight detection legs 223D and 223A is referred to as “area E4”. Even when the center of gravity G is inside the region E4, the left and right directions are likely to fluctuate when the lid 100A is opened or when the lid 100A is opened.

  Finally, a triangular region formed by the intersection point P and the weight detection legs 223C and 223D is referred to as “region E3”. When the center of gravity G is inside the region E3, the center of gravity G is on the lid hinge 129 side with respect to the intersection P of the two virtual diagonal lines L1 and L2, and therefore it is difficult for the center of gravity G to fluctuate in the front-rear direction and the left-right direction.

  Therefore, the respective components are arranged so that the center of gravity G comes inside the region E3. Here, the inner pot 121, the IH coil 211, and the like, which are heavy objects, are arranged near the rear of the IH rice cooker 1. Thereby, the gravity center G of the IH rice cooker 1 in a state where the lid portion 100A is opened can be arranged in the vicinity immediately below the center O of the inner pot 121 (see FIG. 17). Here, the center O of the inner hook 121 means the volume center (space center) of the inner hook 121.

  Here, the case where four weight detection legs 223 are provided is illustrated, but even when five or more weight detection legs 223 are provided, the inside of the triangular region including the two hinge-side weight detection legs vertices as well. Should have a center of gravity G. The two hinge-side weight detection legs are weight detection legs located at both ends with respect to the center of gravity G and on the lid hinge 129 side with respect to the direction of the rotation axis 129a. Also in this case, the point where the center of gravity G is closer to the lid hinge 129 than the intersection of the virtual diagonal lines is the same, and therefore, it is difficult for the center of gravity G to fluctuate in the front-rear direction and the left-right direction.

(Weight measurement operation example)
An example of the weight measurement operation is as described with reference to FIGS. That is, when starting the operation of the IH rice cooker 1, the zero point adjustment of the weight sensor is performed in a state where the lid 100A is open (FIG. 14, S71 → S73 → S74 → S75). Moreover, after performing zero point adjustment, the weight of the to-be-cooked food accommodated in the inner pot 121 is measured with the lid 100A open (S16 → S18 → S20 → S24 in FIG. 13B). , S46 → S47 in FIG. 13D). Of course, the zero point adjustment of the weight sensor may be performed with the lid 100A closed, or the weight of the cooked rice stored in the inner pot 121 may be measured. However, these processes take less time and are easier to operate if the lid 100A is opened.

  That is, the user adjusts the amount of water in the inner pot 121 set in the rice cooker unit 100 while looking at the weighing display unit 102 (see FIG. 2) provided on the front surface of the rice cooker unit 100. For example, when too much water is poured into the inner pot 121, the water is scooped out from the inner pot 121 until an appropriate amount of water is obtained while looking at the weighing display unit 102. Even when the lid portion 100A is open, it is important that wobbling in the front-rear and left-right directions can be eliminated and the weight can be measured stably.

(Example of weight sensor circuit configuration)
Next, a weight sensor circuit configuration example will be described. In the above description, the weight of the cooked rice is calculated by averaging the sensor values of the weight sensors at the four corners (S81 → S82 in FIG. 15), but is not limited to this. That is, it is possible to calculate the weight of the cooked rice by the sum of the sensor values of the weight sensors at the four corners.

  FIG. 19 is a circuit configuration diagram of a weight sensor provided in the IH rice cooker 1 according to the embodiment, and FIG. 20 is a circuit configuration diagram of a single load cell shown in FIG. As shown in FIG. 19, the weight sensor includes load cells SEL <b> 1 to SEL <b> 4, a differential amplifier circuit 11, an A / D converter (12 bits) 12, a CPU 13, and an RC smoothing circuit 14. The load cells SEL1 to SEL4 are obtained by connecting four single load cells as shown in FIG. 20 in series. A total minute voltage signal of four single load cells is output.

  First, the basic circuit operation will be described. A minute voltage signal (analog small signal) corresponding to the applied weight (distortion amount) is output from the bridge connection of the load cells SEL1 to SEL4. The minute voltage signal is amplified by the differential amplifier circuit 11, the amplified analog voltage signal is converted into a digital signal by the A / D converter 12, and the superimposed data is transmitted to the CPU 13 by I2C communication.

  Next, offset adjustment (microcomputer control) by the CPU 13 will be described. The necessary range of weight measurement is “a state in which an empty inner pot 121 is put (about 5 kg)” to “a state in which three rice and water are put in the inner pot 121 (about 6 kg)”. Therefore, when the strain gauge is mounted on the weight detection leg 223, it is necessary to measure from zero g to 6 kg, and the measurement accuracy in the range of 5 kg to 6 kg is lowered. Further, in the vicinity of the output zero V of the differential amplifier circuit 11, the measurement accuracy is degraded due to the influence of noise and the like.

  In order to improve these problems, the CPU 13 sets the PWM signal so that the output voltage of the differential amplifier circuit 11 is in the range of 1 V to 1.5 V when “the empty inner pot 121 is inserted (about 5 kg)”. Is output. Everything is adjusted individually in the factory inspection process. Further, the CPU 13 sets the differential amplifier circuit 11 so that the output voltage of the differential amplifier circuit 11 is about Vcc-1V when “the rice in the inner pot 121 is filled with 3 rice (about 6 kg)”. Adjust the gain. As a result, it is possible to realize a weight sensor that ensures measurement accuracy in the necessary measurement range (5 kg to 6 kg) and is not easily affected by noise or the like.

  As described above, the IH rice cooker 1 according to the embodiment includes a main body in which the inner pot 121 is detachably accommodated, a lid portion 100A that can be opened and closed on the main body, and the lid portion 100A. A lid hinge 129 having a rotation shaft 129a provided at the upper part of the main body and four or more legs provided on the bottom surface of the main body, at least four of which are weight detection legs 223 for detecting weight, The weight detection legs 223 have two hinge-side weight detection legs 223C positioned at both ends with respect to the rotation axis 129a direction on the lid hinge 129 side with respect to the center of gravity G of the IH rice cooker 1 with the lid portion 100A opened. 223D and two reverse hinge side weight detection legs 223A and 223B located on both sides of the rotation axis 129a on the opposite side of the lid hinge 129, and the IH cooking with the lid 100A opened The center of gravity G of the vessel 1 has a lid hinge 129 with respect to an intersection P of two virtual diagonal lines L1, L2 formed by the two hinge side weight detection legs 223C, 223D and the two reverse hinge side weight detection legs 223A, 223B. The weight is measured by using the four weight detection legs 223 with the lid portion 100A being opened. As a result, there are two weight detection legs 223 on the lid hinge 129 side, and the center of gravity G is on the lid hinge 129 side from the intersection P of the two virtual diagonal lines L1, L2. The weight can be measured.

  Further, the center of gravity G of the IH rice cooker 1 with the lid portion 100 </ b> A opened may be disposed in the vicinity immediately below the center of the inner pot 121. Thereby, the gravity center G is arrange | positioned in the center part of the inner hook 121, and the vibration by the bias | inclination of rice or water injection | pouring is hardly received.

  Moreover, when starting the operation of the IH rice cooker 1, the zero point adjustment of the weight sensor may be performed in a state where the lid 100A is open. Thereby, it is possible to absorb the change with time of the weight sensor in a state where the lid portion 100A is open, and to maintain high-precision weight measurement.

  Moreover, after performing zero point adjustment, you may measure the weight of the to-be-cooked rice accommodated in the inner pot 121 in the state which the cover part 100A is open. Accordingly, the amount of water can be accurately adjusted in a state where the lid portion 100A is open. Therefore, it is not necessary to measure the weight by closing the lid portion 100A, and the operation is simple.

  In addition, although the upper and lower separation type IH rice cooker 1 was illustrated and demonstrated here, the arrangement | positioning relationship of the weight detection leg with respect to the gravity center position of the above rice cookers is applied to the general rice cooker which does not isolate | separate up and down. It can also be applied to a microcomputer rice cooker.

[Other embodiments]
As described above, the embodiments have been described. However, it should be understood that the descriptions and drawings forming a part of this disclosure are illustrative and are not restrictive. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  As described above, this embodiment includes various embodiments not described here. For example, although the case where the weight sensor was provided in the IH cooker 200 side was illustrated, a weight sensor can also be provided in the rice cooker part 100 side. In addition to strain gauges, pressure sensors and other types of load cells can also be used as weight sensors.

  The rice cooker of the present embodiment can be applied to a vertically separated IH rice cooker that requires improved operability.

1 ... IH rice cooker (rice cooker)
DESCRIPTION OF SYMBOLS 100 ... Rice cooker part 101 ... Rice cooker operation part 102 ... Measurement display part 111 ... Magnet for detection 112 ... Communication terminal 113 ... Electric power receiving coil 121 ... Inner pot (rice cooker)
122 ... Interface board 123 ... Weighing display board 124 ... Lid lock mechanism 126 ... Rice cooker operation board 127 ... Inner lid 128 ... Steam cylinder 129 ... Lid hinge 131 ... Thermistor (temperature measurement part)
200 ... IH cooker (electromagnetic cooker)
201 ... IH operation unit (electromagnetic cooker operation unit)
211 ... IH coil (heating coil)
212 ... Power supply coil 213 ... Communication terminal 214 ... Reed switch 221 ... FAN
223 ... Base (weight detection leg)
224 ... IH operation board 224a ... weight sensor board 223A ... base member 223B ... strain gauge 223C ... weight sensor base 223D ... rubber foot 223E ... weight sensor cover 225 ... main board 226 ... magnet plug D1, D11 ... display part B1 ... menu button B2 ... Warm / Cancel button B3 ... Rice brand button B4 ... Cooking rice button B11 ... Weighing button

Claims (3)

Cooking possible by mounting the cooker portion on the IH cooker and Do Ri,
The fitting structure for fitting the bottom of the rice cooker part and the top surface of the IH cooker is provided on the bottom of the rice cooker part and the top surface of the IH cooker so that the corners R are different in front and rear. A cooked rice cooker,
The IH cooker
An IH coil for electromagnetic induction heating of an object to be heated;
A power supply coil for supplying power to the rice cooker,
A reed switch that is spaced apart from the power supply coil and the IH coil and provided at a corner of the IH cooker, and that operates when the rice cooker is mounted on the IH cooker;
The rice cooker part
A power receiving coil ;
Wherein when the on IH cooker rice cooker unit is mounted, anda magnetic unit which is positioned near opposite to the position where the reed switch is disposed,
When the rice cooker portion is mounted on the IH cooker by the fitting structure and the reed switch is operated by the magnetic means , the power receiving coil receives power from the power supply coil by electromagnetic induction , and the rice cooking A rice cooker configured to be in a state in which communication between the cooker and the IH cooker is possible . The IH cooker and the rice cooker unit include a communication terminal for wireless communication,
2. When the power receiving coil receives power from the power supply coil, wireless communication is enabled between the IH cooker and the rice cooker unit via the communication terminal. Rice cooker as described in. The rice cooker according to claim 1 or 2 , wherein an outer edge of the top surface of the IH cooker and an outer edge of the bottom of the rice cooker part are tapered.

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