JP5056194B2 - Electric rice cooker - Google Patents

Description

  The present invention relates to an electric rice cooker provided with a notification means such as voice.

  Conventionally, an electric rice cooker is generally provided with an acoustic notification means that appeals to the hearing of a person such as a buzzer. For example, when an operation switch such as a rice cooker switch or a heat retention switch is operated, an operation sound is generated, or rice cooker is used. Completion notification, alarm information notification, and the like.

  In addition, recently, as such a notification means, for example, the use of a voice speaker that speaks a word is also being considered, and electric rice cooking that allows notification of more specific information contents such as the setting contents of the setting method at the time of setting the rice cooking menu is being considered. The provision of vessels is also being prepared and studied.

  By the way, conventionally, such notification means such as a buzzer and a speaker are in the outer case of the rice cooker body, have a space for installation, are not easily affected by heat, and are released to the outside. As a place where the sound effect is high, a place on the bottom member of the inner bottom of the outer case is generally selected, and sound is emitted from the bottom side of the rice cooker body through a sound emission opening (grill) ( For example, see Patent Document 1).

Japanese Patent Laying-Open No. 2006-94924 (Specifications, pages 1-7, FIG. 1-3)

  However, the conventional configuration has the following problems.

  (1) Since it is far from the microcomputer board provided corresponding to the back of the operation panel on the front side of the rice cooker body, the wiring becomes long and the wiring work (handling) becomes complicated.

  In particular, when the rear side position of the rice cooker body is selected as the position on the bottom member, such a problem becomes more prominent.

  (2) Further, in the case of the same configuration, the number of wiring materials increases and the cost increases.

  (3) Further, in the case of the same configuration, when the rear position of the rice cooker body is selected as described above, the wiring extends considerably long from the microcomputer board to the notification means such as voice through the work coil or the heater. Therefore, it becomes easy to pick up various electromagnetic noises in the meantime, and the clearness of the notification sound is lowered.

  (4) Further, in the case of the conventional configuration, since the installation space of the two boards of the microcomputer board and the audio circuit board and the connection with the microcomputer board must be taken into consideration, there are more restrictions.

The present invention has been made to solve such problems, and disposed audio report known means under the microcontroller board rice cooker body, by connecting the microcontroller board in the shortest distance, the wiring distance The wiring work is reduced and the amount of necessary wiring is reduced, the influence of ambient heat and electromagnetic noise is avoided as much as possible, and the air intake port of the cooling fan is used as the sound emission port. An electric rice cooker that eliminates the need for a dedicated sound outlet and makes the flow of cooling air supplied from the cooling fan to the microcomputer board side by making the surface on one side of the sound notification means flat . Is intended to provide.

  In order to achieve the same object, the present invention is configured with the following problem solving means.

(1) Invention of Claim 1 The electric rice cooker of this invention consists of an inner pot, an outer case, and an inner case, the rice cooker main body which accommodates so that a inner pot can be taken out, and opens and closes the upper opening of this rice cooker main body. space between the lid for covering freely, and heating means for heating the inner pot, a voice report known means for notifying sound Koejo paper required, and the rice cooker main body of the outer casing and the inner casing It provided located above the operating panel back side, in an electric rice cooker comprising a microcomputer board for controlling the heating means and audio report known means, apart from the microcontroller board to below the microcontroller board the audio circuit board is provided, by disposing the sound notification means to the audio circuit board, as well as reduce the amount of wiring by shortening the wiring distance, while avoiding the influence of heat and electromagnetic noise, the audio circuit The above external cable below the board The bottom, the cooling fan draws air through the air suction port is provided, the audio notification means, it was unnecessary a dedicated sound emitting port by sounding the air inlet of the cooling fan as sound outlets It is characterized by.

According to such a configuration, audio report known means including audio circuit board will be is provided below the microcontroller board, since it is possible to connect the microcomputer MCU board in the shortest distance, the wiring The distance is shortened, the wiring work is facilitated, the amount of necessary wiring can be reduced, and the influence of heat and surrounding electromagnetic noise can be avoided as much as possible.

Further, since the air suction port of the cooling fan is used as the sound emission port, a sound emission port dedicated for voice notification can be eliminated.

(2) Invention of Claim 2 The electric rice cooker of this invention consists of an inner pot, an outer case, and an inner case, and the rice cooker main body which accommodates so that a inner pan can be taken out, and opens and closes the upper opening of this rice cooker main body. space between the lid for covering freely, and heating means for heating the inner pot, a voice report known means for notifying sound Koejo paper required, and the rice cooker main body of the outer casing and the inner casing It provided located above the operating panel back side, in an electric rice cooker comprising a microcomputer board for controlling the heating means and audio report known means, apart from the microcontroller board to below the microcontroller board the audio circuit board is provided, by disposing the sound voice report knowledge means the audio circuit board, as well as reduce the amount of wiring by shortening the wiring distance, while avoiding the influence of heat and electromagnetic noise, the The above external cable below the audio circuit board A cooling fan that sucks air through an air suction port is provided at the bottom, and one surface of the sound notification means is a flat surface, and the flat surface is installed in parallel with the air flow from the cooling fan. Thus, the air from the cooling fan that has cooled the sound notification means is supplied to the microcomputer board side without being disturbed .

According to such a configuration, audio report known means including audio circuit board will be is provided below the microcontroller board, since it is possible to connect the microcomputer MCU board in the shortest distance, the wiring The distance is shortened, the wiring work is facilitated, the amount of necessary wiring can be reduced, and the influence of heat and surrounding electromagnetic noise can be avoided as much as possible.

Moreover, in the case of the configuration of the present invention, the surface on one side of the sound notification means is made flat so as not to disturb the flow of cooling air from the cooling fan to the microcomputer board. The cooling air passes smoothly and the voice notification means is efficiently cooled, and the flow of the cooling air is disturbed in the voice notification means part, and the cooling efficiency on the microcomputer board side is not lowered. .

Further, the sound from the sound notification means can be output to the outside in a clear state without being affected by the wind noise from the disturbed cooling fan.

As a result, according to the present invention, easy wiring work, sound-only by wiring cost is low, the influence of heat and electromagnetic noise rather name also utilizing air inlet of the cooling fan as sound outlets the mouth is unnecessary, and to further not to disturb the flow of the cooling air supplied from the cooling fan to the microcontroller board side by the surface of one side and flat surface of the sound reporting means, a sound reporting means such as audio speakers It becomes possible to provide a convenient electric rice cooker equipped.

<First Embodiment>
1-6 has shown the structure of the electric rice cooker which concerns on the best Embodiment 1 of this invention provided with the above characteristics.

(Configuration of the rice cooker body)
First, in the electric rice cooker according to the first embodiment of the present invention, as shown in FIGS. 1 and 2, for example, an inner pan (rice cooker or heat insulation container) 3 is made of a nonmetallic material (for example, made of ceramic). Earthenware pot) is adopted, and the outer peripheral surface of the bottom wall portion 3a and the curved surface between the bottom wall portion 3a and the side wall portion 3b surface are capable of self-heating by eddy current induced inside, For example, first and second induction heating elements G1 and G2 made of metal such as silver paste are individually attached.

  That is, the electric rice cooker has an inner pot 3 having the same configuration, a dish-shaped bottom wall portion 4 made of a lower synthetic resin and an upper cylindrical portion formed so that the inner pot 3 can be arbitrarily set. An inner case (protective frame) 46 composed of a side wall 6, a bottomed cylindrical outer case 1 that is an outer casing for holding the inner case 46, and the outer case 1 and the inner case 46 are integrally formed. It is comprised from the cover unit (lid body) 2 provided in the upper part of the made rice cooker main body so that opening and closing is possible.

  A coil cover 93 is provided on the lower side of the bottom wall portion (bottom portion) 4a of the inner case 4, the ferrite core 7 is disposed at the lower portion thereof, and the bottom wall portion 3a of the inner pot 3 is disposed at the upper portion thereof. Corresponding to the positions of the induction heating elements G1 and G2 on the lower surface side and the side curved surface side, there are provided first and second sets of work coils C1 and C2 in which litz wires are wound concentrically. Thus, when energized, an eddy current is induced in the first and second induction heating elements G1 and G2 of the inner pot 3 to heat the inner pot 3. The first and second work coils C1 and C2 are connected in series with each other, for example (therefore, simply shown as the work coil C in the following description of operation and the control circuit diagram of FIG. 4).

  The dish-shaped bottom wall portion 4 of the inner case 46 has a sensor portion fitting port of the center sensor CS formed at the center of the bottom surface portion 4a, and a donut-shaped heat shield on the outer peripheral side upper surface of the sensor portion fitting port. A plate 50 is provided. Further, a flange-like step portion 4c projecting outward in the predetermined width radial direction is provided on the upper end side of the outer peripheral side surface portion 4b, and the lower end 6b side of the upper side tubular side wall portion 6 is provided on the step portion 4c portion. The engagement is placed.

  On the other hand, the upper end 6 a of the upper cylindrical side wall 6 is connected and fixed to the shoulder member 11 at the upper end of the rice cooker main body via the inner frame member 9.

  One end of each of the first and second work coils C1 and C2 is, for example, as shown in the control circuit diagram of FIG. 4, and is connected to a power line via a rectifier circuit and smoothing circuits 35 and 36, and the other end is IGBT driven. Each is connected to the collector of an IGBT (power transistor) of the circuit 42.

  Further, a side heater (heat insulation heater) H1 that functions as a heating means during rice cooking and heat insulation is provided on the outer periphery of the upper side cylindrical side wall portion 6 of the inner case 46. The entire inner pot 3 is heated effectively and uniformly. A side temperature sensor (not shown) for detecting the temperature of the side heater H1 is provided in the side heater H1.

  Then, the two types of heating means C1, C2, and H1 and the lid heater H2 on the lid unit 2 side described later are appropriately driven and controlled by the microcomputer control unit 32 as shown in the control circuit diagram of FIG. 4, for example. The rice cooking function and the heat retention function can be realized.

  On the other hand, the above-mentioned rice cooking, timer reservation for the heat retention function, selection of rice cooking and heat retention menu, operation settings such as heating output, heating time, heat retention temperature, heat retention time in each process corresponding to each menu, the electric rice cooker body 3 is performed by the user via various input switch groups (operation key groups) 22a to 22i of the operation panel 20 as shown in FIG. The second work coils C1 and C2, the side heater H1, and the lid heater H2 are appropriately controlled.

  The switches 22a to 22i on the operation panel 20 include, for example, a rice cooking switch 22a (its ON display portion 23a), a timer reservation switch 22b (its ON display portion 23c), a cancel switch 22c, and a timer reservation hour / minute setting switch 22e. , Rice cooking menu selection switch 22f, rice selection switch 22g, voice guide switch 22h for selecting and executing a voice guide function such as menu setting or once set menu, heat retention switch 22i (its ON display portion 23d), It consists of a fire level setting switch 22j and the like.

  In addition, in the central portion of the operation panel 20, each menu for rice cooking and heat insulation, the type of rice, the level of hot rice, the image necessary for adjusting the sound volume at the time of voice guide selection setting, the set heat retention temperature, the setting A liquid crystal display unit 21 is provided for displaying the heat retention time, the current time, the remaining time until cooking is completed, an empty cooking notification, and various other necessary items.

  The operation of each switch corresponding to the operation function and the display function of the operation panel 20 is located above the space between the outer case 1 and the inner case 46 on the back surface of the operation panel 20 in the outer case 1. A microcomputer board (microcomputer board) MB provided with a switch mechanism, a liquid crystal display, and their input / output control circuits is installed in an inclined state along the panel surface.

  The microcomputer board MB compresses and lays out the audio circuit (audio speaker drive circuit 60) together, and the shoulders are connected and fixed across the upper portions of the outer case 1 and the inner case 46. Inclined along the surface of the operation panel 20 on the upper side of the microcomputer board cover 81 extending in a U shape from the lower surface side of the member 11 to the bottom member 1b below the outer case 1 (up to the support rib support rib 72). The microcomputer board mounting portion 81a is mounted on the upper surface side recessed groove portion.

  The microcomputer board cover 81 has a lower portion bent from the microcomputer board mounting portion 81a in a U-shape and extends vertically on the support rib 72 of the bottom member 1b, and the vertical flat plate portion is connected to the mounting portion 81b of the audio speaker 61. It has become. Then, as shown in FIG. 2, for example, a dynamic voice speaker 61 having a very large horn portion enlargement angle has a driving portion (voice coil portion) on the front side and a horn portion (cone). Part) facing the back side. The audio speaker 61 is attached to the audio speaker attachment portion 81b by fixing it with screws 63 via an elastic member (damper) 65 such as a foam material to the inside of a U-shaped (hat-shaped) sheet metal member 62. The method is adopted.

  The input / output terminal 61a of the voice coil section of the voice speaker 61 is extended to the lower part of the upper microcomputer board mounting part 81a via a short lead wire 61b, and the voice circuit of the microcomputer board MB side is inserted in the same part. The output terminal 79 is detachably connected.

  Further, on the front side of the inner case 4, for example, as shown in FIG. 4, the first and second work coils C (C1, C2), the side heater H1, the lid heater H2, and the like are driven and controlled. IGBT, choke coil CH, control IC chip HIC, side heater drive circuit, lid heater drive circuit, rectifier circuit consisting of diode bridge for power supply voltage rectification, resonance capacitor CD1, smoothing capacitor CD2 of smoothing circuit, heat sink 73, etc. A control board (control board) CB having the control components is provided upright in the vertical direction.

  The control board CB is attached to the front side of the control board cover 82 that extends vertically in the vertical direction on the front side of the inner case 46 and is fixed upright.

  The cooling fan 17 is installed on the lower base member 1b of the control board CB and the heat sink 73 so that the suction side corresponds to the air suction grille 71 provided on the bottom member 1b. When the cooling fan 17 is driven, the air sucked from the lower air suction grill 71 is blown upward along the heat sink 73, the control board CB, and the audio speaker mounting portion 81b to cool those portions. Thereafter, the microcomputer board MB further flows around the inner case 4 while cooling.

  Of course, the cooling air from the cooling fan 17 is also diverted to the bottom side of the inner pot 3, and also cools the heat generating portions such as the first and second work coils C1, C2.

  The outer case 1 includes, for example, a cylindrical cover member 1a formed of a metal member in the vertical direction, a synthetic resin shoulder member 11 coupled to the upper end of the cover member 1a, and the cover member 1a. The bottom portion as a whole is composed of the bottom member 1b made of the synthetic resin integrated at the lower end portion, and has a heat insulating and ventilating space portion of a predetermined width between the bottom wall portion 4 of the inner case 46. It is comprised by the cylindrical body.

  Furthermore, a center sensor fitting opening (center sensor storage space) penetrating concentrically in the vertical direction as described above is formed at the center of the bottom-side dish-shaped bottom wall 4 of the inner case 46. A center sensor CS having an inner pan temperature sensor S for detecting the temperature of the bottom of the inner pan in a state in which the center sensor can be moved up and down in the center sensor storage space and is always upwardly biased by a coil spring. Is provided.

  On the other hand, reference numeral 2 denotes a lid unit. The lid unit 2 comprises an outer cover 12 made of a synthetic resin that constitutes an outer peripheral surface of the lid unit 2 and a pressure adjusting pipe 15 at the center, and is fitted inside the outer cover 12. A synthetic resin inner frame 13 provided integrally, a packing 14a and a metal heat radiating plate 16a in the inner opening of the inner frame 13, and a lid heater H2 provided on the upper surface of the heat radiating plate 16a, And a metal inner lid 16b provided below the heat radiating plate 16a. Further, packings 14a and 14b are respectively provided below the outer peripheral edge of the heat radiating plate 16a and below the outer peripheral edge of the inner lid 16b. The inner lid 16b is connected to the opening edge of the inner pot 3 via the packing 14b. It is made to contact the upper surface part of the part 3c. Reference numeral 15a denotes a pressure regulating valve in the pressure regulating pipe 15, and reference numeral 15b denotes a lower side cap thereof.

  The lid unit 2 is rotatably attached to the shoulder member 11 via a hinge mechanism 8 on the rear end side of the upper part of the outer case 1, and a predetermined portion of the lid unit 2 is disposed on the open end side. A lock mechanism 10 is provided that engages the position to open and close the lid unit 2 in the vertical direction.

  Therefore, in this structure, at the time of rice cooking, the inner pot 3 is moved from the bottom wall portion 3a to the side wall portion 3b side by eddy current generated by driving the first and second sets of work coils C1 and C2. The provided first and second induction heating elements G1 and G2 generate heat to heat a portion from the bottom wall portion 3a to the side wall portion 3b of the inner pot 3, and the side wall of the inner pot 3 by the side heater H1. The part 3b is heated, and the upper part of the inner pot 3 is further heated by the lid heater H2.

  On the other hand, the microcomputer control unit 32 of the microcomputer board MB is provided with a desired recognizing means for judging the content of the user's instruction input via the input switches 22a to 22j, and is recognized by the recognizing means. Depending on the user's instructions, the desired rice cooking or heat retaining function, the heat retaining OFF function, the desired rice cooking (or heat retaining) menu, the predetermined heating pattern (heating output, heating time) corresponding to the rice cooking or heat retaining menu, and the heat The level is set, and the rice cooking heating control means or the heat insulation heating control means and the heat insulation OFF control means are appropriately operated to perform desired rice cooking or heat insulation control and heat insulation OFF control.

  Therefore, the user can use the above input switches 22a to 22j to cook rice or heat, timer reservation, reservation time setting, white rice or brown rice, early cooking, rice porridge, sushi, rice cooking, etc. If the selected setting contents of the various functions such as the mode, the heat insulation OFF mode, the firewood adjustment mode, etc. are input, the corresponding function contents are transferred to the rice cooking and heat insulation heating pattern setting section through the recognition means in the microcomputer control unit 32. The setting is automatically input, and the corresponding rice cooking or thermal insulation heating control, thermal insulation OFF control, and fire control are appropriately performed.

  As mentioned above, in the electric rice cooker of this invention, it consists of the inner pot 3, the outer case 1, and the inner case 46, the rice cooker main body which accommodates the inner pot 3 so that extraction is possible, and the upper opening of this rice cooker main body. A lid 2 that covers the lid in a freely openable / closable manner, first and second work coils C1 and C2 that are heating means for heating the inner pot 3, and a voice that is a notification means such as a voice for notifying information such as necessary voice. The first and second work coils C1 and C2 and the sound are provided on the back side of the operation panel 20 above the space between the speaker 61 and the outer case 1 and the inner case 46 of the rice cooker body. In an electric rice cooker comprising a microcomputer board MB for controlling the speaker 61, an audio circuit is compressed and laid out on the microcomputer board MB, and an audio speaker 61 is provided in the vicinity of the microcomputer board MB provided with the audio circuit. This It has been and features a.

  According to such a configuration, the audio speaker 61 is provided in the vicinity of the microcomputer board MB and can be connected to the microcomputer control unit 32 of the microcomputer board MB at the shortest distance, so that the wiring distance is reduced as much as possible. In addition, the wiring work is facilitated, the amount of necessary wiring can be reduced, and the influence of ambient heat and electromagnetic noise can be avoided as much as possible.

  Moreover, in the configuration of the present invention, the audio circuit is compressed and laid out on the microcomputer board MB itself, and the audio speaker 61 is connected in the vicinity of the microcomputer board MB integrally provided with the audio circuit. Since the audio circuit board itself as described above becomes unnecessary, the space factor can be increased accordingly, the audio speaker 61 can be installed in a smaller space, and the number of wires and the wiring length can be saved. Installation work becomes easier.

  Moreover, in the same configuration, the cooling fan 17 that sucks air through the bottom member 1b side air suction grill 71 is provided below the microcomputer board MB and the voice speaker 61, and the voice speaker 61 includes the same cooling fan. The seventeen air suction grills 71 are configured to emit sound as sound emission ports.

  As described above, if the sound emission opening is made by using the air suction grille 71 of the cooling fan 17 provided on the bottom member 1b side, it is not necessary to separately form a dedicated sound emission opening, which is convenient.

  In this case, the audio speaker 61 is installed with its flat surface parallel to the air flow from the cooling fan 17.

  With this configuration, even if the audio speaker 61 is connected in the vicinity of the microcomputer board MB, the audio speaker 61 inhibits the flow of air from the cooling fan 17 and cools the microcomputer board MB and other heat generating parts. It does not disturb the flow of the wind, but rather performs a guide function that smoothly guides the wind from below toward the microcomputer board MB.

  In this case, for example, as shown in FIGS. 5A, 5C, and 5D, the operation of the cooling fan 17 is stopped when the audio speaker 61 in which the audio guide switch 22h is pressed is operated. It is configured as follows.

  With this configuration, when the sound speaker 61 is operated, clear sound or the like is output from the air suction grille 71 of the cooling fan 17 to the outside without being disturbed by the air from the cooling fan 17 and the operation sound of the cooling fan 17. can do.

  Similarly, as shown in FIGS. 5A, 5B, and 5D, when the voice speaker 61 with the voice guide switch 22h pressed is operated, the first and second work coils C1 are used. , C2 is stopped.

  With this configuration, the electromagnetic noise generated by the first and second work coils C1 and C2 is not disturbed by the oscillation sound of the first and second work coils C1 and C2 when the voice speaker 61 is operated. A clearer sound or the like can be output from the air suction grille 71 of the cooling fan 17 to the outside without being affected.

  In these cases, for example, when the voice guide switch (key) 22h is pressed, the first and second work coils C1 and C2 and the cooling fan 17 are not completely stopped as described above. As shown in the time charts (a) to (d), their outputs may be lowered by a predetermined amount or more.

(Configuration of the rice cooker body side control circuit)
Next, FIG. 4 has shown the structure of the control circuit part centering on the microcomputer control unit 32 which controls rice cooking by the rice cooker main body side comprised as mentioned above or heat retention, an audio | voice guide, etc. FIG.

  In FIG. 4, reference numeral 32 denotes the rice cooking heating control means and the heat retaining heating control means as described above, the inner pot temperature detecting means, the inner pot presence detecting means, the empty cooking detection (determination) means, the liquid crystal display control means, and the voice speaker control. It is a microcomputer control unit (CPU) for various controls, such as rice cooking and heat insulation, provided with a means, a firewood control means, etc.

  The microcomputer control unit 32 is mainly configured of a microcomputer. For example, an inner pot temperature detection circuit 43 that detects the temperature of the bottom of the inner pot 3 and an IGBT drive circuit 42 that drives a work coil C (work coil circuit). The inner pot detecting circuit 44 for detecting the set state of the inner pot 3, the main clock signal oscillation circuit 59, the reset circuit 54, the side heater driving circuit 33 for driving the side heater H1, and the lid heater driving circuit 24 for driving the lid heater H2. , Voice speaker 61 drive circuit 60, work coil rectifying / smoothing circuits 35, 35, DC power source rectifying / smoothing circuit (rectifier, smoothing capacitor) 49, input voltage detecting circuit 52, fan motor driving circuit 16, energy saving circuit 57, EEPROM 58 , Input current detection circuit 47, zero cross signal detection circuit 48, synchronous trigger circuit 40, C power circuit 51, a microcomputer power supply circuit 53, the liquid crystal display unit 21, operation display LED23a～23d, various operation switches 22A～22j, such as a power supply noise filter circuit 70 is input connected respectively.

  And first, the inner pot temperature detection sensor S is provided in the inner pot temperature detection circuit 43 and the inner pot detection circuit 44 provided corresponding to the inner pot temperature detection sensor S of the center sensor CS section of the bottom 3a side of the inner pot 3. The temperature detection signal of the bottom 3a of the inner pot 3 is input.

  Moreover, the IGBT drive circuit 42 corresponding to the work coil circuit C is configured to output the output values (wattage) of the first and second work coils C1 and C2 according to each step of the rice cooking process, for example, by the microcomputer control unit 32. ) And the energization rate (for example, n seconds / 16 seconds) at the same output value, respectively, by appropriately changing the heating temperature and heating pattern of the non-metallic inner pot 3 such as the clay pot in each step of the rice cooking process. Feedback control is performed to achieve variable cooking and proper water absorption and uniform cooking of rice without unevenness of heating, taking into account the amount.

  The feedback control by the microcomputer control unit 32 is performed based on the feedback value adjustment circuit corresponding to the output state of the work coil circuit C (C1, C2) and the control signal of the feedback control circuit.

  Further, by controlling the side heater driving circuit 33 and the lid heater driving circuit 24 by the microcomputer control unit 32, for example, predetermined output values of the side heater H1 and the lid heater H2 according to each process of rice cooking or heat insulation. By appropriately changing the energization rate (for example, n seconds / 16 seconds) in each step, the heating temperature and heating pattern of the inner pot 3 in each step of cooking rice or keeping warm can be appropriately controlled in consideration of the actual rice cooking amount. It is supposed to be.

(Voice speaker volume adjustment method)
By the way, the volume at the time of the voice guidance and the buzzer sound by the voice speaker 61 varies depending on whether it is day or night, the difference in the living environment of an apartment or a single house, the preference of the user, and the level of hearing function.

  Therefore, in this embodiment, as shown in the liquid crystal screen flowcharts a to g of FIG. 7, for example, the volume level can be adjusted both during voice guidance and during buzzer notification.

  Now, for example, as shown in step a of FIG. 7, it is assumed that the time display of AM 10:30 is made on the screen of the liquid crystal display unit 21 using the cooked menu.

  In this state a, for example, the menu switch 22f is pressed to select a volume setting mode screen as shown in step b. At this time, the set volume at that time is displayed on the screen (for example, in the case of the figure, the volume is medium).

  Therefore, in the display state of b, when the timer is reserved, the volume is adjusted, for example, as shown in c using one of the minute switches 22e.

  For example, when the switch 22e is pressed, the volume is increased, and when the minute switch is pressed, the volume is decreased.

  Of course, in this case, it is also possible to select the buzzer function with the menu switch 22f as shown in d and adjust the volume of only the buzzer sound as shown in e in the same state.

  Thus, when the adjustment of the volume under each notification function is completed, for example, the rice cooking switch 22a is pressed in the same state. Then, as shown in step f, the adjusted volume in the same state is determined as the set volume.

  Next, when the menu switch 22f is newly pressed, the next new menu can be selected as shown in step g.

  In such a volume setting, for example, a screen display using a digital level indicator as shown in FIGS. Is possible.

  This makes it very easy to understand the set volume level.

  On the other hand, when the voice guide switch 22h on the operation panel 20 is pressed, the voice speaker driving circuit 60 informs the user of the rice cooking menu and the rice cooking state set at that time by voice. The microcomputer control unit 32 stops driving the work coil circuit C and the fan motor drive circuit 16 in the notification state.

<Best Embodiment 2>
Next, FIG. 9 has shown the structure of the principal part of the electric rice cooker which concerns on best Embodiment 2 of this invention.

  In the microcomputer board MB of the electric rice cooker according to the second embodiment, the voice speaker is attached to the lower part of the microcomputer board cover 81 without compressing and laying out the voice circuit as in the microcomputer board MB according to the first embodiment. The audio circuit board 84 is attached together to the portion 81b, and the audio speaker 61 is fixed with screws 63 in the same direction.

  In this case, the audio circuit board 84 is required separately from the microcomputer board MB. However, if the audio speaker 61 is attached to the audio circuit board 84 and attached to the audio speaker attachment portion 81b on the microcomputer board cover 81 side, Mounting and wiring to the microcomputer board MB side are easy, and the wiring distance and required wiring amount are almost the same.

  In addition, since the audio circuit board can be used up to now, the cost can be reduced compared to newly compressing and laying out the audio circuit on the microcomputer board MB side.

<Third Embodiment>
Next, FIG. 10 has shown the structure of the principal part of the electric rice cooker which concerns on best Embodiment 3 of this invention.

  In the electric rice cooker according to the third embodiment, the sound speaker 61 in the best embodiment 1 is attached in the reverse direction (the mounting structure is the same) so that sound is emitted toward the front of the rice cooker body. In addition, the sound is output from the sound emission port 78 formed on the front arc surface of the bottom member 1b.

  With such a configuration, since the voice is output straight toward the user side, it is difficult to generate a booming sound.

  Further, since it is not affected by the oscillation of the first and second work coils C1 and C2 and the operating sound of the cooling fan 17, it is not necessary to stop and control them, and the rice cooking function is not affected. The program is also simplified.

It is a longitudinal cross-sectional view which shows the structure of the whole rice cooker main body of the electric rice cooker which concerns on best Embodiment 1 of this invention. It is an expanded sectional view which shows the structure of the principal part of the electric rice cooker main body. It is an enlarged front view of the operation panel part centering on the liquid crystal display part of the electric rice cooker. It is a block diagram which shows the whole control circuit structure of the electric rice cooker. It is a time chart which shows the relationship between the operating state of the audio | voice speaker by which the audio | voice guide switch was pushed in the electric rice cooker, and the operating state of a work coil and a cooling fan. It is a time chart of the other example which shows the relationship between the operating state of the audio | voice speaker by which the audio | voice guide switch was pushed in the electric rice cooker, and the operating state of a work coil and a cooling fan. It is a flowchart which shows the volume adjustment operation screen ad of the audio | voice speaker of the electric rice cooker. It is a flowchart which shows the more concrete volume adjustment operation screen ag of the audio | voice speaker of the electric rice cooker. It is a longitudinal cross-sectional view which shows the structure of the principal part of the rice cooker main body of the electric rice cooker which concerns on best Embodiment 2 of this invention. It is a longitudinal cross-sectional view which shows the structure of the principal part of the rice cooker main body of the electric rice cooker which concerns on best Embodiment 3 of this invention.

  C1, C2 and C are work coils, H1 is a side heater, H2 is a shoulder heater, 1 is an outer case, 2 is a lid unit, 3 is an inner pot, 20 is an operation panel, 21 is a liquid crystal display, and 22h is a voice guide switch. , 32 are microcomputer control units.

Claims (2)

A rice cooker main body comprising an inner pot, an outer case, and an inner case, wherein the inner pot is removably accommodated, a lid that covers the upper opening of the rice cooker body so as to be openable and closable, and heating means for heating the inner pot When a voice report known means for notifying sound Koejo report required, provided located in the space above the operation panel back side between the cooker body of the outer casing and the inner casing, said heating means and the electric cooker comprising a microcomputer board for controlling the audio report known means, separately from audio circuit board with the microcontroller board to below the microcontroller board provided, the audio notification means to the voice circuit board By reducing the wiring distance, the wiring amount is reduced and the influence of heat and electromagnetic noise is avoided, while air is introduced into the bottom of the outer case below the audio circuit board via an air suction port. Suck the cooling fan The emissions provided, the sound reporting means, electric rice cookers, characterized in that it is unnecessary dedicated sound emitting port by sounding the air inlet of the cooling fan as sound outlets. A rice cooker main body comprising an inner pot, an outer case, and an inner case, wherein the inner pot is removably accommodated, a lid that covers the upper opening of the rice cooker body so as to be openable and closable, and heating means for heating the inner pot When a voice report known means for notifying sound Koejo report required, provided located in the space above the operation panel back side between the cooker body of the outer casing and the inner casing, said heating means in and electric cooker comprising a microcomputer board for controlling the audio report known means, separately from audio circuit board with the microcontroller board to below the microcontroller board provided, the sound voice report to the voice circuit board By providing the knowledge means , the wiring distance is shortened to reduce the amount of wiring and the influence of heat and electromagnetic noise is avoided, while the bottom of the outer case below the audio circuit board is provided with an air suction port. Cooling fan that sucks in air And the voice notification means is installed in parallel with the air flow from the cooling fan, so that the one side of the voice notification means is a flat surface. An electric rice cooker characterized in that the air is supplied to the microcomputer board side without being disturbed.

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