JP3386084B2 - rice cooker - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker provided with an operation / display section on the upper surface of a lid to improve usability and compactness.

[0002]

2. Description of the Related Art Conventionally, this type of radiant heating type rice cooker is
A cylindrical container with a bottom is housed in the main body of the vessel, a heater as a heating element is attached to the bottom of the main body of the vessel, and the heat conductive plate on the top of the heater contacts the vessel to prevent the heater from being exposed. The radiant heat from the heater is radiated into the space. Then, the space between the container and the main body of the container is heated, then the heat radiated into the space is received on the back surface of the plate, and the heat of the plate is transferred to the container side by heat conduction from the contact portion between the container and the plate. Thus, the entire container is heated.

[0003]

In the rice cooker having the above-mentioned conventional structure, most of the heat released from the heater into the space is collected in the contact portion between the container and the plate, but it is realistic. Since the container and the plate cannot be brought into uniform contact with each other due to a problem in dimensional accuracy, thermal deformation when heated, and the like, uneven heating is caused by local heating due to partial contact. Therefore, the outer circumference of the bottom surface of the container is curved in an R shape, and the strength of the bottom of the container and the ease of installation on a mounting surface such as a table are improved,
In order to stabilize the dimensional accuracy, the central portion of the bottom surface of the container is formed in a convex shape, and the plate is linearly brought into contact with the bottom surface of the container located at the lower end of the R-shaped curved portion to form a container. The contact with the plate is enhanced. However, in such a configuration, since the contact portion between the container and the plate is formed near the outer periphery of the container, the heat from the heater is concentrated on the outer peripheral portion of the container, and only this outer peripheral portion is stronger than the central portion. It causes heating and uneven heating. Further, it is conceivable to form the R-shaped curved portion large up to approximately the center of the bottom surface of the container and move the contact portion toward the central portion, but there is a problem that the inner volume of the container becomes small.

On the other hand, in order to prevent dew condensation on the lower surface of the lid body during rice cooking and heat retention, a heating means is provided inside the lid body for heating the lower surface of the lid body and the inner lid during rice cooking and heat retention. However, the temperature inside the lid rises due to the heat from the heating means, and due to the temperature difference between the inner space of the lid and the transparent window behind the lid facing the LCD of the display, the transparent side is transparent. When the temperature on the back side of the window becomes low, moisture inside the lid condenses on the back side of the transparent window and becomes cloudy, making it difficult for the LCD to be seen through the transparent window from outside.

In the case where the lid is provided with the display section, when the distance between the LCD and the transparent window section is too large, LC is passed through the transparent window section.
D becomes difficult to see, and particularly since the display section is on the upper surface of the lid, the lower side of the LCD may be cut off when viewed from an oblique direction, resulting in poor visibility. Therefore, it is necessary to reduce the distance between the LCD and the transparent window portion. However, when the transparent window portion is formed of a transparent sheet and brought close to the LCD, the transparent sheet is deformed when an external force is applied to the transparent window portion, There is a risk that force will be applied to the LCD. In particular, when the display unit is provided on the upper surface of the lid body, an object can often be placed on the upper surface of the lid body, which is easily affected by such a problem.

In view of the above problems, the present invention suppresses dew condensation on the back surface of the transparent window portion, and even when the transparent window portion and the LCD are brought close to each other, the LCD is not subjected to excessive force ,
In addition, switch operation using elastic deformation in parts other than the transparent window
A work section can be provided and the overall height of the rice cooker can be suppressed.
In addition, it prevents condensation on the surface of the partition member and anti-fog sheet.
The purpose is to provide a cookable rice cooker.

[0007]

According to another aspect of the rice cooker of the present invention, a heating means and a display control board above the heating means are provided inside the lid, and the rice cooker faces the LCD provided on the display control board. a transparent window portion, the cooker provided on an upper surface of the lid, to form the transparent window portion is different composite of materials, Toru
A transparent sheet is integrally molded on the upper surface of clear resin to form the composite material.
And the transparent window portion is substantially horizontal with the upper surface of the lid body.
And a partition between the transparent window and the LCD
Of the composite material and the partition member by providing a material and an anti-fog sheet
And between the partition member and the anti-fog sheet.
It forms a closed space .

Further, in the rice cooker according to a second aspect of the invention, the space portion is formed in a portion of the transparent window portion facing the LCD side.

[0009]

According to the structure of claim 1, the transparent window portion is made of a composite material, so that the strength of the transparent window portion is increased, and even if one material of the transparent window portion is broken due to an impact from the outside, the other By selecting a material having elastic characteristics as the material of (1), it is possible to prevent problems such as scattering of debris and entry of water into the interior through the crack gap. In addition, by combining different materials, it is possible to select materials with different thermal conductivity, reduce the thermal conductivity compared to the case of forming the transparent window part with a single material, and improve heat insulation. Then, suppress the cold on the back of the transparent window,
The dew condensation phenomenon can be suppressed. In addition, since a sheet that can be elastically deformed is used for parts other than the transparent window part because the switch operation part is provided, even if such a sheet is selected as one material, the other material is not easily elastically deformed. By doing so, the transparent window part made by combining these materials is not easily deformed by an external force, and even when the transparent window part and the LCD are brought close to each other, the transparent window part is deformed by the external force, and the LCD is impossible. With no excessive force applied, there are fewer parts failures. In addition, printing can be performed between composite materials, in which case it is possible to prevent direct contact with the printing part, which makes it difficult to distinguish the print contents due to faint prints or stains during use. Also disappears.

Further, by setting one of the elastically deformable transparent sheet of the double engagement member can be provided with a switch operation unit utilizing elastic deformation at a site other than the transparent window portion.

[0011] The degree by improving the strength of the transparent window portion by the double engagement member, a force in the LCD is not applied even when placed objects on top of the transparent window portion, the transparent window portion object is placed In addition, there is no problem even when the lid is made substantially horizontal to the upper surface of the lid, and the lid can be formed thinner than in the case where the transparent window portion is tilted to the extent that an object cannot be placed. Therefore, the height of the entire rice cooker can be suppressed low.

Further, since a plurality of heat insulating spaces are formed between the transparent window portion and the LCD, the heat insulating effect on the back side of the transparent window portion is increased, and the cooling on the back side of the transparent window portion is reduced to suppress the dew condensation phenomenon. be able to. In particular, between the composite material and the partition member
Since a sealed space is formed between them, disconnection of this part
The thermal effect increases, and the temperature difference between the composite material and the partition member
Is reduced, and dew condensation on the surface of the partition member is suppressed.
In addition, the space between the partition member and the anti-fog sheet should be sealed.
Since the space is formed, the heat insulation effect of this part is also large.
Therefore, the temperature difference between the partition member and the anti-fog sheet is small.
Therefore, the dew condensation on the surface of the antifogging sheet is suppressed.

According to the second aspect of the invention, the space of the transparent window portion facing the LCD side has a larger heat insulating effect, and the back side of the transparent window portion is further cooled to suppress the dew condensation phenomenon. be able to.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a partial cross-sectional view of a radiant heating type rice cooker. In FIG. 1, reference numeral 1 denotes a bowl main body having an opening on the upper surface. 3 and 3. Reference numeral 4 denotes a bottomed cylindrical container that is removably housed in the inner frame 2 and is composed of a member having good thermal conductivity such as aluminum. A substantially flat convex portion 5 is formed at the center of the bottom surface of the container 4, and a thermistor 7 as a container temperature detecting means is incorporated so that the outer bottom portion of the convex portion 5 is pressed by the elastic force of the spring 6. A plate 8 is provided in the inner frame 2. The convex portion 5
An inclined portion 9 is formed on the outer side of the container 4, and a strip-shaped flat portion 10 forming the bottom surface of the container 4 is provided on the outer peripheral portion of the container 4 located outside the inclined portion 9. And this flat part 10
An R-shaped curved portion 12 is formed between the outer peripheral side and the lower portion of the outer portion 11.

Reference numeral 13 is a plate made of aluminum having heat conductivity provided on the bottom of the inner frame 2. This plate 13 is subjected to secondary electrolytic alumite on the surface after primary electrolytic alumite, and then subjected to secondary electrolytic alumite in an electrolytic solution containing nickel, etc., and maintains a good heat absorption property by performing a series of black alumite treatments. In addition, the heat resistance and strength of the surface of the plate 13 are improved. Also,
In order to prevent the exposure of the heater, which will be described later, the plate 13 is arranged so as to face the entire outer bottom surface of the container 4. The plate 13 is provided in a linear contact state along the inner peripheral side of the flat portion 10 constituting the container 4, and an annular contact portion 14 is formed at the contact portion between the plate 13 and the container 4. A plate support 15 is provided below the plate 13, and a spring 17 provided between the flange portion 15A of the plate support 15 and the support plate 16 biases the plate 13 upward, that is, toward the container 4 side. ing.

Reference numeral 21 denotes a heating space formed below the plate 13 and between the inner frame 2 and the heating space 21.
A radiant heating type heater 22 composed of a sheathed heater is provided in a non-contact state with the plate 13. The heater 22 is constructed by providing a heating line (not shown) on a stainless steel pipe, and as shown in FIG. 2, is substantially C-shaped and concentric with the bottom surface of the container 4. Formed. That is, the heater 22 is provided so as to face the contact portion 14 between the container 4 and the plate 13, and the inner peripheral portion 23 is provided so as to be folded back outside the inner peripheral portion 23, and the outer portion 11 and the curved portion 12 and the like are provided. An outer peripheral portion 24 that applies radiant heat to the side portion of the container 4 and an end portion 25 that electrically connects to the outside is opposed to each end of the outer peripheral portion 24.

Referring again to FIG. 1, 26 is a body heater provided on the outer side of the inner frame 2, 27 is the inner frame 2 and the outer frame 3.
A heat insulator 28 provided between the inner frame 2 and the outer frame 3 constitutes an upper portion of the container body 1 and connects the inner frame 2 and the outer frame 3. Also, 29
Is a heater installation table for mounting and fixing the heater 22.

Reference numeral 31 is a lid that covers the upper opening of the container 4 so as to be openable and closable. The lid 31 is an outer lid 32 made of ABS resin or the like.
And a lid frame 33 provided along the lower outer periphery of the outer lid 32.
And a lid lower surface plate 34 made of aluminum or the like attached to the lower side of the outer lid 32 while forming a space. Further, a lid heater 35 as a heating means for heating the lid lower surface plate 34 is provided on the upper surface of the lid lower surface plate 34, and a lid sensor 36 for detecting the temperature of the lid lower surface plate 34 is provided. The lid lower surface plate 34 is attached and fixed to the lid frame 33 via screws 38 together with the heat insulating plate 37 made of an aluminum plate.
A lid packing 39, which is formed in an annular shape by extrusion molding, is held between the container 33 and 33 so as to come into contact with the upper end of the container 4. Further, in the heat insulating space formed above the heat insulating plate 37,
A heat insulating material 40 made of glass wool is provided.

On the other hand, a concave portion 32A is formed on the upper surface of the outer lid 32, and the operation display unit 41 is accommodated in the concave portion 32A.
The configuration of the operation display unit 41 will be described in detail with reference to FIGS. 3 and 4. Reference numeral 42 denotes a control board serving as a display control board provided on the bottom of the recess 32A and above the lid heater 35. A liquid crystal display L is provided on the surface of the control board 42.
An LCD holder 44 for accommodating the CD 43 is provided. on the other hand,
An operation panel assembly 45 is provided above the recess 32A so as to cover the recess 32A. The operation panel assembly 45 is a composite material of different materials including an operation panel 46 made of a transparent acrylic resin or the like and an operation panel sheet 47 having a surface flush with the outer lid 32 and corresponding to a transparent sheet made of polyester. The operation panel sheet 47 is formed so as to be integrally outsert-molded while covering the entire surface of the operation panel 46. Further, a transparent portion 48 as a transparent window portion is formed at a substantially central portion of the operation panel assembly 45 so as to face or face the LCD 43, and the operation panel sheet 47 is located outside the transparent portion 48. A switch operation unit 49 and the like are formed in the. Further, 50 is a character sheet as a partitioning member made of polyester or the like, a transparent portion 51 is formed facing the LCD 43 like the operation panel assembly 45, and a rice cooking menu display is provided outside the transparent portion 51. Part 52
Is formed. The character sheet 50 is attached and fixed to a step portion 46A formed on the inner peripheral portion of the operation panel 46.
Due to the step A, a predetermined space, that is, a space 53 is formed between the operation panel 46 and the character sheet 50. On the other hand, 54 is a transparent polyester anti-fogging sheet provided below the character sheet 50. The anti-fogging sheet 54 is formed in a concave shape in the center so as to face the LCD 43, whereby the character sheet 50 is formed.
And the anti-fog sheet 54 also have a predetermined space, that is, a space 55.
Is formed. Then, as shown in FIG. 3, the transparent portion 48
Is formed substantially horizontally with the upper surface of the lid 31.

As shown in FIG. 4, the switch operating portion 49 formed on the operation panel sheet 47 is a mode switch 49.
A, hour / minute switch 49B, start / off switch 49C,
It is composed of a warm / hot switch 49D and a menu switch 49E. In addition to these switch operating sections 49, the operation panel sheet 47 is provided with operation state display sections 61 each having an LED (not shown). The operation state display unit 61 includes a rice cooking / purple display unit 61A, a heat retention / hot display unit 61B, and a timer display unit 61C. On the other hand, on one side of the LCD 43, 62A for clock, 62B for instant rice cooking,
62C for timer 1, 62D for timer 2, 62 for timer 3
E, each mode display section 62 of the fire control 62F is installed in parallel, and "1", "2",
A heating amount setting display unit 63 having the display modes of “3”, “4”, “5” and “fluffy”, “shaking” is provided. Further, reference numeral 64 is a substantially triangular menu indicator portion, which is provided so as to face the rice cooking menu display portion 52, respectively. A current time display section 65 and a cooked time display section 66 are provided in the approximate center of the LED 43.
65 and 66 are provided with AM / PM switching display sections 65A and 66A having display forms of "AM" and "PM", and 4-digit segment display sections 65B and 66B. As shown in FIG. 5, instead of the AM / PM switching display units 65A and 66A, an AM display unit 68 in the form of the sun and an PM display unit 69 in the form of the moon are overlapped, and these two elements are combined. by selectively using, so as to switch the display of the morning and afternoon
It may be. In this case, in the morning, only the morning display section 68 shown in FIG. 6 is displayed, and in the afternoon, only the afternoon display section 69 shown in FIG. 7 is displayed. Further, as shown in FIG. 8, only the afternoon display section 69 may be entirely displayed.

Next, the configuration of the block diagram shown in FIG. 9 will be described. 81 is a peripheral memory 82 and a time measuring means 83
A well-known microcomputer having
On the input side of this microcomputer 81, input means 84
While the switch operation unit 49 is connected via
The temperature detecting means 86 such as the thermistor 7 and the lid sensor 36 are connected via the input means 85. Further, a plurality of output means 87, 88, 89 are connected to the output side of the microcomputer 81, and a timer 90, a rice cooking means 91 and a display means 92 of the operation display unit 41 are connected to the output means 87, 88, 89, respectively. Connected. The microcomputer 81 controls the rice cooking means 91 in accordance with the programs stored in the memory 82 according to the input conditions of the temperature detecting means 86 and the switch operating section 49, the time preset in the timer 90, and the like. Then, the rice cooking means 91 controls the power supply to the heater 22, the body heater 26, and the lid heater 35 based on the control command from the microcomputer 81.

Next, the operation of the above configuration will be described. First, each operation based on the operation of the operation display unit 41 will be described. In this embodiment, every time the mode switch 49A is pressed, the display of the mode display section 62 is for clock 62A → for instant cooking 62B → for timer 1. 62C → 62D for timer 2 → 62E for timer 3 → 62F for heat adjustment → 62A for clock. Then, when the mode display portion 62 of the timepiece 62A is selected, the mode display portion 62 of the timepiece 62A and the current time display portion 65 are displayed as shown in FIG. The part 65 is in a blinking state, and the current time setting can be changed by the hour / minute switch 49B. Even when the present time display section 65 is blinking, the time is counted. On the other hand, 62B mode display section 62 for instant rice cooking
When is selected, as shown in FIG. 11, the mode display portion 62 of the instant rice cooker 62B, the menu index portion 64, and the current time display portion 65 are displayed, and the start / off switch 49C is displayed. When is pressed, rice cooking is immediately started via the rice cooking means 91. Also, for timer 1 62C, for timer 2
When the mode display portion 62 of 62D or 62E for timer 3 is selected, the cooking time of the timer 90 reserved and stored in each course (for example, timer 1
Is "AM 6:00" and Timer 2 is "AM 7: 0"
0 ”, timer 3“ PM 7:00 ”) is displayed on the cooked time display section 66 and the start / off switch 49C is displayed.
When is pressed, rice cooking control is performed based on the timer operation so that the rice cooking is completed at the time displayed in the cooked time display unit 66. (The display form when the mode display portion 62 of the timer 1 62C is selected is shown in FIG. 12.) Also, while the cooked time display portion 66 is displayed, the cooked rice is cooked by operating the hour / minute switch 49B. The time setting can be changed, and the newly updated time is set by the microcomputer 81.
Is stored in the timer 90 via. Furthermore, for fire control 62F
When the mode display unit 62 of is selected, as shown in FIG. 13, the mode display unit 62 of the fire control 62F, the heating amount setting display unit 63, and the menu index unit 64 are displayed. By operating the hour / minute switch 49B, it becomes possible to variably set the heating amount during rice cooking. The heating amount can be adjusted in five steps from "1" to "5" shown in the heating amount setting display portion 63, and the state is stored after the setting.

On the other hand, the heat retention / hot switch in the off state
When 49D is operated, the heat retention operation is started via the rice cooking means 91, and when the heat retention / hot switch 49D is operated during the heat retention, the inside of the container 4 is reheated to a predetermined temperature. Further, the menu index portion 64 of the LCD 43 is moved each time the menu switch 49E is pressed and operated, and the rice cooking menu can be appropriately switched according to preference. Furthermore, when the start / off switch 49C is pressed during rice cooking, all the operations being executed are canceled.

When a series of rice cooking operations is started by the above operation, the heater 22, the body heater 26, and the lid heater 35 are connected and disconnected via the rice cooking means 91. Then, when the heater 22 is energized, the heat from the heater 22 is conducted to the plate 13 through the heating space 21, and the contact portion between the container 4 and the plate 13
From 14 the bottom of the container 4 is gradually heated. At this time, since the contact portion 14 is formed along the inner peripheral side of the flat portion 10 inside the curved portion 12, the contact portion 14 is located at the center more than the contact portion between the conventional container 4 and the plate 13. Moved to the department side,
As a result, not only the outer peripheral side of the bottom surface of the container 4 but also the inner peripheral side of the bottom surface are uniformly heated in a well-balanced manner. Further, since the flat portion 10 located on the outer peripheral portion of the container 4 forms the bottommost surface of the container 4, it is not necessary to form the curved portion 12 formed between the flat portion 10 and the outer portion 11 large. Container 4
It is also possible to prevent the internal volume of the battery from decreasing. Further, since the inner peripheral portion 23 of the heater 22 is arranged so as to face the contact portion 14 between the container 4 and the plate 13, the inner peripheral portion 23 mainly acts to heat the contact portion 14. The outer peripheral portion 24 of the heater 22 mainly acts to radiatively heat the outer portion 11 of the container 4 through the heating space 21. Therefore, the bottom portion of the container 4 is heated by the heater 22 of the inner peripheral portion 23 via the plate 13, and the outer peripheral portion 24
The outer portion 11 of the container 4 is heated by the heater 22 described above, so that the entire container 4 can be uniformly and evenly heated. Moreover, since the contact portion 14 is moved to the center side of the container 4 having the thermistor 7, the temperature rise of the container 4 can be detected quickly, and the occurrence of charring due to the delay in the dry-up detection can be suppressed.

FIGS. 14 and 15 are characteristic diagrams of the conventional example and the present example showing the temperature change in each part of the container 4 from the start of rice cooking to the time after dry-up. In addition,
As shown in FIG. 16, H in FIG. 14 and FIG.
14 is the temperature, T is the temperature at the center of the bottom surface of the container 4, a is the temperature at the upper layer of the container 4 located 10 mm below the water surface, b is the temperature at the middle layer of the container 4, and c is the temperature at the bottom of the container 4. The temperature in the lower layer portion of the container 4 at a position 10 mm higher is shown. Further, in FIG. 16, R is rice contained in the container 4, and W is water.

As shown in FIGS. 14 and 15, in the conventional example, it can be seen that the temperatures b and c of the middle layer portion and the lower layer portion rise slowly. Therefore, the boiling temperature may not reach a sufficient boiling point at the time of dry-up when the water W is exhausted, and the rice may become hard or the core may remain. On the other hand, in this embodiment, the difference in temperature rise between the temperatures H and T at the contact portion 14 and the center of the bottom surface of the container 4 is small. That is, it can be seen that the heating balance of the entire bottom surface of the container 4 is significantly improved as compared with the conventional example. Further, since the outer side portion 11 of the container 4 is well heated by the radiant heating from the outer peripheral portion 24 of the heater 22, the temperature a of the upper layer portion rises faster than before. Therefore, in accordance with the decrease in the water level due to the absorption of water of rice R, the temperatures b and c in the middle layer and the lower layer also rise similarly, and the entire container 4 is quickly and uniformly heated to prevent uneven cooking. You can cook rice.

In the operation display unit 41, since the operation panel 46 and the operation panel sheet 47 are integrally formed, the operation panel sheet is extended to the end of the operation panel 46.
The upper surface of the operation panel 46 can be covered with 47. Therefore, the entire operation panel 46 can be formed in advance with a transparent material through which the LCD 43 can be seen, and the switch operation section 49 and the like can be provided on the operation panel sheet 47. Further, since the cooked rice menu display portion 52 is formed by printing on the character sheet 50, the LCD 43 only needs to be provided with the menu indicator portion 64 corresponding to each cooked rice menu display portion 52, and the LCD 43 can be made compact. .

By the way, the space 53 is sealed between the operation panel 46 and the character sheet 50, and the heat insulating effect of this part is great. Therefore, the temperature difference between the operation panel sheet 47 and the character sheet 50 becomes small, and the dew condensation on the surface of the character sheet 50 is suppressed. Further, since the sealed space 55 is formed between the character sheet 50 and the anti-fog sheet 54, the space 53 is formed.
Similarly to this, the heat insulating effect of this portion is large, the temperature difference between the operation panel sheet 47 and the antifogging sheet 54 is small, and dew condensation on the surface of the antifogging sheet 54 is suppressed. In addition, even if dew condensation occurs inside the operation display unit 41, dew condensation occurs from a portion other than the anti-fog sheet 54, which has a small heat insulating effect.
The influence of dew condensation on the transparent portion 48 located in the display portion of the CD 43 can be suppressed as much as possible. In addition, the step portions 46A of the operation panel 46 and the concave antifogging sheet 54 allow the respective space portions 51, 53
Is formed from the upper surface of the operation panel sheet 47, LC
Even if the D43 side is pressed, the LCD 43 does not come into contact with the anti-fog sheet 54 or the like, and it is possible to prevent the occurrence of an interference pattern on the LCD 43 due to the contact.

As described above, according to the above-described embodiment, the lid heater 35 as the heating means and the control board 42 as the display control board above the lid heater 35 are provided inside the lid 31.
In a rice cooker in which a transparent portion 48 as a transparent window portion facing the LCD 43 provided on the control board 42 is provided on the upper surface of the lid body 31,
The transparent portion 48 is formed of a composite material (operation panel 46 and operation panel sheet 47) made of different materials.

In this case, by making the transparent portion 48 a composite material, the strength of the transparent portion 48 is increased, and even if the operation panel 46, which is one of the materials of the transparent portion 48, is broken by an external impact, By selecting the operation panel sheet 47 that is a material having elasticity as the other material, it is possible to prevent problems such as scattering of debris and water entering the inside through the crack gap. In addition, by combining different materials, it is possible to select materials with different thermal conductivity, reduce the thermal conductivity compared to the case of forming the transparent part 48 with a single material, and improve heat insulation. Thus, it is possible to suppress the cooling of the rear surface of the transparent portion 48 and suppress the dew condensation phenomenon. In addition, in parts other than the transparent part 48,
Since the operation panel sheet 47 that is elastically deformable is used due to the provision of the switch operation part 49 and the like, even if such an operation panel sheet 47 is selected as one material, the other material can be made a material that is not easily elastically deformed. The transparent portion 48 made by combining these materials is not easily deformed by an external force, and even when the transparent portion 48 and the LCD 43 are brought close to each other, the transparent portion 48 is deformed by the external force and an unreasonable force is applied to the LCD 43. No more troubles with parts. In addition, printing can be performed between composite materials, in which case it is possible to prevent direct contact with the printing part, which makes it difficult to distinguish the print contents due to faint prints or stains during use. Also disappears.

The composite material of this embodiment is constructed by integrally molding an operation panel sheet 47, which is a transparent sheet, on the upper surface of the operation panel 46 made of transparent resin. in this way,
By using one of the composite materials as the elastically deformable operation panel sheet 47, it is possible to provide the switch operation part 49 utilizing elastic deformation in a region other than the transparent part 48.

Further, in this embodiment, the transparent portion 48 is formed substantially horizontally with the upper surface of the lid 31. In this case, since the strength of the transparent portion 48 is improved by the composite material, no force is applied to the LCD 43 even when an object is placed on the upper surface of the transparent portion 48. There is no problem even when the lid 31 is made substantially horizontal to the upper surface of the lid 31, and the lid 31 can be formed thinner than when the transparent portion 48 is tilted to the extent that an object cannot be placed.
Therefore, the height of the entire rice cooker can be suppressed low.

Further, in this embodiment, a character sheet 50 as a partition member is provided between the transparent portion 48 and the LCD 43, and the transparent portion 48 is provided.
A plurality of spaces (space portions 53 and 55) are formed between the 48 and the LCD 43. In this case, since a plurality of heat insulating spaces are formed between the transparent portion 48 and the LCD 43, the heat insulating effect on the back side of the transparent portion 48 is increased, and the back side of the transparent portion 48 is less chilled and the dew condensation phenomenon can be suppressed. Especially the operation panel 46 and the character sheet 50
Since a sealed space 53 is formed between
Insulation effect is large, and the operation panel sheet 47 and character sheet
The temperature difference between the character sheet 50 and
Dew is suppressed. Also, the character sheet 50 and the anti-fog sheet 54
Since a sealed space 55 is also formed between the
Similar to the space 53, this part has a large heat insulation effect, and the operation panel
The temperature difference between the sheet 47 and the anti-fog sheet 54 becomes smaller,
Condensation on the surface of the anti-fog sheet 54 is suppressed.

Further, in this embodiment, the LCD 43 of the transparent portion 48 is
Space portions (space portions 53 and 55) are formed in the portion facing the side. In this case, the space facing the LCD 43 side of the transparent portion 48 has a greater heat insulating effect due to the space portions 53 and 55.
48 Condensation phenomenon can be suppressed by further reducing the cooling on the back side.

In addition, in this embodiment, the contact portion 14 is a flat portion.
Since it is formed linearly along the inner peripheral side of 10, the contact portion 14 moves further toward the center side of the container 4 than in the conventional case. Further, since the flat portion 10 located on the outer peripheral portion of the container 4 forms the bottom surface of the container 4, the flat portion 10 is formed between the flat portion 10 and the outer portion 11 to move the contact portion 14 toward the center of the container 4. The curved portion 12 to be formed does not need to be formed large up to approximately the center of the bottom surface of the container 4. This makes it possible to improve the heating balance at the bottom of the container 4 and to perform uniform heating without uneven heating without reducing the internal volume of the container 4.

Further, since the heater 22 of the inner peripheral portion 23 heats the bottom portion of the container 4 via the plate 13 and the heater 22 of the outer peripheral portion 24 heats the outer portion 11 of the container 4,
The whole can be uniformly heated with a better balance.

Further, the following points can be mentioned as effects of the embodiment. First, since the current time, the timer time, the level of fire adjustment, etc. generally need not be reset once they are set, these modes are configured to be selected by one common mode switch 49A. As a result, the number of switch operating sections 49 can be significantly reduced without any functional inferiority to the conventional one. Further, for example, even if the number of timers set is increased more than in the embodiment, the setting of each mode can be switched by operating the common single mode switch 49A, and the menu switch 49E and the like can be shared with the mode switch 49A. By doing so, the number of switch operating parts 49 can be further reduced.

By the way, in daily use, there is a usage of a rice cooker peculiar to each household, for example, there are households that use the timer function every time, and conversely, households that do not use the timer function at all. In this embodiment, paying attention to this point, by operating the mode switch 49A in advance to select either instant rice cooking or timer reservation, the subsequent operation of the start / off switch 49C automatically cooks rice in a desired state. The operability can be remarkably simplified.

Further, as shown in FIGS. 5 to 8, by overlapping the morning display portion 68 and the afternoon display portion 69 depending on the sun and the moon, it is easier to distinguish them from characters and the same display space can be used. That is, the display can be made larger, and the time display portions 65 and 66 can be freed from complicated display forms.

Further, since the space portion 51 and the space portion 53 having a heat insulating effect are formed inside the operation display unit 41, it is possible to prevent the display portion of the LCD 43 from being fogged even if the use environment changes. You can Further, even if dew condensation occurs inside the operation display unit 41, dew condensation occurs from a portion other than the anti-fog sheet 54, which has a small heat insulating effect, so that the transparent portion 48 and the like can be prevented from fogging. Moreover, space 5
By forming the cooked rice menu display portion 52 on the character sheet for forming the 1, 53, the display content of the LCD 43 can be simplified and downsized.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the heater may be formed in a double spiral shape in addition to the substantially C-shape in the embodiment, or 2
The inner peripheral portion and the outer peripheral portion may be independently formed by a book heater.

[0042]

According to the rice cooker of the present invention, the heating means and the display control board above the heating means are provided inside the lid body, and the transparent window portion facing the LCD provided on the display control board is provided. In the rice cooker provided on the upper surface of the lid, the transparent window is formed of a composite material of different materials, and the upper surface of the transparent resin is formed.
A transparent sheet integrally molded into the composite material,
While making the transparent window part substantially horizontal with the upper surface of the lid,
A partition member and an anti-fog sheet are provided between the transparent window and the LCD.
Between the composite material and the partition member, and the partition
Space between the cover and the anti-fog sheet
In addition to suppressing the dew condensation on the back surface of the transparent window part, even when the transparent window part and the LCD are brought close to each other, L
It is possible to provide a rice cooker that does not apply excessive force to a CD. Further, it is possible to prevent problems such as scattering of debris and water entering the inside of the cracks, and printing can be performed between the composite materials. In this case, it is possible to avoid the problem that the printed contents are not discriminated.

[0043] The switch operation unit that utilizes elastic deformation in addition can be provided in a portion other than magnetic Akiramado unit, LC
No force is applied to D, and the height of the entire rice cooker can be suppressed low . Furthermore, it is possible to suppress dew condensation phenomenon by reducing the chill transparent window back, in particular the partition member and antifogging Sea
Condensation on the surface of the belt can be suppressed.

[0044] Further, cooker according to claim 2 is obtained by forming a space portion in the portion facing the LCD side of the transparent window portion, a further reduced to condensation phenomena chill transparent window back Can be suppressed.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a rice cooker showing an embodiment of the present invention.

FIG. 2 is a front view of the same heater.

FIG. 3 is a sectional view of a main part of the same.

FIG. 4 is a front view of the operation display unit and its periphery.

FIG. 5 is a front view of a time display unit showing another display mode of the above.

FIG. 6 is a front view of a time display unit showing a display form in the morning same as above.

FIG. 7 is a flow chart up to the end of main rice cooking.

FIG. 8 is a front view of a time display section showing another display mode of the above.

FIG. 9 is a block diagram showing an electrical configuration of the same.

FIG. 10 is a front view of the operation display unit showing a display form when the mode display unit for the same watch is selected.

FIG. 11 is a front view of the operation display unit showing the display form when the mode display unit for instant rice cooking is selected.

FIG. 12 is a front view of the operation display unit showing the display form when the mode display unit for the timer 1 is selected.

FIG. 13 is a front view of the operation display unit showing a display form when the mode adjustment unit for adjusting heat is selected.

FIG. 14 is a characteristic diagram showing a temperature change of each part in the container in the conventional example.

FIG. 15 is a characteristic diagram showing a temperature change of each part in the container in the present embodiment.

FIG. 16 is a schematic explanatory view showing each measurement point in the container.

[Explanation of symbols]

31 Lid 35 Lid heater (heating means) 42 Control board (display control board) 43 LCD 46 Operation panel (transparent resin) 47 Operation panel sheet (transparent sheet) 48 Transparent part (transparent window) 50 Character sheet (partitioning member) 53,55 Space part (space, space part) 54 Anti-fog sheet

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-3-47210 (JP, A) JP-A-6-209849 (JP, A) JP-A-63-63416 (JP, A) JP-A-4- 197208 (JP, A) JP-A-1-274714 (JP, A) JP-A-63-40515 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/00 103

Claims (2)

(57) [Claims] 1. A heating means and a display control board above the heating means are provided inside the lid, and a transparent window portion facing the LCD provided on the display control board is provided on an upper surface of the lid. In the rice cooker, the transparent window part is made of composite material of different materials, and the transparent sheet is integrally molded on the upper surface of the transparent resin.
The composite material, and the transparent window is placed on the lid.
And the transparent window and the LCD.
A partition member and an anti-fog sheet are provided between the composite material and
Between the partition member and between the partition member and the anti-fog sheet
It is characterized by forming a sealed space between each
Rice cooker. 2. A cooker as claimed in claim 1, wherein the forming the space portion to the portion facing the LCD side of the transparent window portion.