JP2006141427A - Rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker capable of reducing the sensible temperature when a user touches an outer lid by hand during the rice boiling in a conventional rice cooker with the outer lid to which a metal decorative sheet is attached with an intention of improving the rice-boiling performance by increasing the heat quantity supplied to a cooked object in a boil-up process and in a steaming process in the rice-cooking sequence and facilitating making the rice starchy. <P>SOLUTION: The rice cooker comprises a rice cooker body for detachably storing a pot, the outer lid for opening/closing an opening of the rice cooker body, and a heating means for heating the pot. The metal decorative sheet is attached to the outer surface of the outer lid; and a space, whose size is not uniform but different according to positions, is disposed between the outer lid and the decorative sheet. Ribs are disposed to form lattices in the space, and the ribs which form lattices are characterized by such a form of the ribs that there is at least one part where there is no rib. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rice cooker.

  In recent years, rice cookers in which a metal decorative plate is attached to the outer lid have become popular in the market. Background of wearing the metal decorative board includes improvement of merchantability (luxury feeling) and antifouling.

  Generally, a rice cooker has a main body for storing a pan and an openable / closable outer lid that covers the upper surface of the pan, but a metal decorative plate is attached to the outer surface of the outer lid, When cooking with a rice cooker equipped with an outer lid, the heat from the pot, etc., generated by rice cooking is dissipated to the outer lid, and the temperature of the metal decorative plate on the outer surface of the outer lid increases. Compared to the outer lid of, because the temperature of touch when touched by the hand is high and it is easy to cause burns, etc., in the rice cooker with the outer lid fitted with a metal decorative plate, compared to the outer lid made of resin, In some cases, the absolute temperature of the outer lid during cooking had to be lowered.

Patent Document 1 discloses a conventional rice cooker. The structure of the outer lid equipped with the metal decorative plate of the rice cooker of the conventional example is the configuration in which the metal decorative plate and the resin outer cover on the outer surface portion are provided with a uniform space of 0.5 to 3 mm. It is said.
Japanese Patent Laid-Open No. 2002-443

  In the conventional rice cooker disclosed in Patent Document 1, a space is formed between the outer lid and the metal decorative plate, and the space can suppress heat dissipation from the pan that generates heat during rice cooking. However, when the space is uniform between 0.5 and 3 mm, the amount of heat supplied to the cooked food in the cooking process and the unevenness process is not increased in the rice cooking process in order to improve the rice cooking performance. Otherwise, the temperature of the pan would rise, and the heat from the pan would cause it to feel hot when the outer lid was touched.

  Further, in the mounting of the resin outer lid and the metal decorative plate, a fitting portion is provided on the outer peripheral portion of the outer lid, and a gap is generated when the fitting is performed. When the outer lid is wiped, etc., there is a problem that electrical damage may occur if water enters the outer lid through the gap and adheres to the electrical components inside the outer lid.

  Furthermore, in the outer lid, when the outer lid is made of resin and the decorative plate is made of metal, the temperature of the outer lid rises due to heat radiation from the pot during rice cooking and heat insulation. In the case of the resin of the outer lid and the metal of the decorative plate, a difference in deformation size during cooling is caused by the difference in the linear expansion coefficient. Therefore, due to the repetition of cold heat, due to the difference in the linear expansion coefficient, even if the resin outer lid and the metal decorative plate are fixed without gaps at the beginning, gaps are generated and the fixation is increased. There was also a problem that the decorative board floated from the outer lid.

  The present invention solves the above-described conventional problems, and in the structure of the outer lid equipped with a metal decorative plate, the amount of heat supplied to the cooked food in the cooking process and the unevenness process is increased in the rice cooking process. It is an object of the present invention to provide a rice cooker that can reduce the sensible temperature even if the customer touches the outer lid during cooking when trying to improve the rice cooking performance.

  It is another object of the present invention to provide a rice cooker in which water does not enter the outer lid with a configuration in which there is no gap in the fitting portion between the outer lid and the decorative plate.

  It is another object of the present invention to provide a rice cooker in which a metal decorative plate does not float from a resin outer lid and is securely fixed.

  In order to solve the above problems, the present invention has the following configuration.

  The invention described in claim 1 includes a rice cooker body that detachably stores a pan, an outer lid that opens and closes an opening of the rice cooker body, a heating means that heats the pan, and an outer side of the outer lid. A metal decorative plate is attached, and a space is provided between the outer lid and the decorative plate that has not a certain size but a gap depending on the location, ribs that form a lattice are disposed in the space, and the lattice is The rib to be formed is a rice cooker characterized in that at least one portion is formed in a shape without a rib.

  According to the present invention, since the space between the outer lid and the decorative plate becomes different heat insulation spaces, for example, the height dimension of the lattice A in the heat insulation space is 5 mm, and the height size of another lattice B is 15 mm. Sometimes, during cooking, the atmosphere temperature in the lattice A is higher than the atmosphere temperature in the lattice B, and the temperature of the decorative plate on the top of the lattice A feels hot. The heat in the lattice A moves into the lattice B due to the notches, and the overall ambient temperature in the heat insulating space can be reduced. Therefore, the temperature of the decorative board provided in the upper part of the heat insulation space can be reduced, and the height dimension in the heat insulation gap can be reduced as compared with a fixed dimension configuration of 5 mm. Therefore, even if the customer touches the outer lid during cooking, it can provide a rice cooker that can reduce the temperature of experience, and rice cooking that emphasizes rice cooking performance without considering the temperature of the metal decorative plate Since a sequence can be created, rice cooking performance can be improved. In addition, since there is a heat insulating space between the outer lid and the decorative plate, when the decorative plate is pressed, the decorative plate is dented, but the decorative plate is pressed by arranging ribs that form the lattice. However, it is possible to provide a configuration that does not get depressed.

  The invention according to claim 2 is the rice cooker according to claim 1, wherein a heat insulating material is disposed between the top surface of the rib forming the lattice and the metal decorative plate.

  According to the present invention, by disposing a heat insulating material between the top surface of the ribs forming the lattice and the metal decorative plate, the temperature of the metal decorative plate can be further reduced, Even if the customer touches the outer lid during cooking, the temperature of the body can be further reduced, and the effect on temperature can be further improved than the effect of claim 1.

  According to a third aspect of the present invention, the fitting portion of the outer lid and the decorative plate of the outer lid is provided with a groove in the outer lid, and the bending of the decorative plate of the outer lid enters the groove of the outer lid, and the groove 2. A rice cooker according to claim 1, wherein a rib is disposed on the inner peripheral portion of the rim and the decorative plate of the outer lid is in contact with the rib.

  According to the present invention, by adopting a configuration in which the rib on the inner peripheral portion of the groove of the outer lid and the metal decorative plate are abutted, there is no gap in the outer peripheral portion of the outer lid, and water is supplied from the upper surface of the outer lid. Even if it is applied, there is no risk of water entering the outer lid, and electrical damage can be avoided.

  According to a fourth aspect of the present invention, the outer cover and the outer cover decorative plate are mechanically fixed such as screws, and the outer cover and the outer cover decorative plate are placed at the center of the outer cover. 2. A rice cooker according to claim 1, wherein a gap is provided between the outer lid and the decorative plate of the outer lid.

  According to the present invention, when the outer lid is made of resin and the decorative plate is made of metal, the temperature of the outer lid rises due to heat dissipation from the pot during cooking and heat retention. There is a difference in coefficient of linear expansion between the resin of the outer lid and the metal of the decorative plate, resulting in a dimensional change during cooling, the dimensional change of the outer lid is greater than that of the metallic decorative plate, and the decorative plate floats from the outer lid. In this configuration, the outer peripheral portion of the decorative plate is in contact with the outer lid, and the central portion of the decorative plate is a screw or the like with the outer lid provided with a gap. By arranging the machine fixing, the decorative plate is deformed to a shape in which the outer peripheral portion of the decorative plate is left as it is and the central portion is moved downward from the initial shape as compared to the shape before the mechanical fixing. And the force which goes to a lower part of an outer cover acts on the outer peripheral part of a decorative board always. Therefore, absorb the difference in dimensional change due to the difference in coefficient of linear expansion between the outer lid and the metal decorative plate when cooking and keeping warm, and prevent the metal decorative plate from coming out of the outer lid Can do.

  The invention according to claim 5 is the rice cooker according to claim 1, wherein a thin film made of resin is disposed on the inner and outer surface portions of the decorative plate of the outer lid.

  According to the present invention, in the outer peripheral fitting portion of the outer cover and the outer cover of the metal decorative plate of the outer cover, by configuring the inner peripheral portion of the groove of the outer cover and the metal decorative plate, There is no gap in the outer periphery of the outer lid, and it is easy to generate a rubbing sound when pressing a metal decorative board, but a thin resin film should be placed on the inner and outer surface parts of the metal decorative board. Therefore, it is possible to achieve a configuration in which the rubbing sound does not occur, and to exhibit the rust prevention effect of the metal decorative board.

  In the rice cooking process, the amount of heat supplied to the cooked food in the cooking process and the unevenness process is increased, the gelatinization of the rice is promoted, and the outer lid of the rice cooker that attempts to improve the rice cooking performance is made of metal. Even if the customer touches the outer lid during rice cooking in the configuration of the outer lid fitted with a decorative plate, it is possible to provide a rice cooker that can reduce the sensible temperature, and the resin outer lid and metal makeup The structure of the outer lid of the rice cooker having a structure in which the metal decorative plate does not float from the outer lid can be provided in consideration of secular change in fixing the plate.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments that specifically show the best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
The rice cooker of Embodiment 1 of this invention is demonstrated using FIG.1, FIG.2, FIG.3.

  FIG. 1 is a longitudinal sectional view of a rice cooker according to an embodiment of the present invention. In the drawing, lead wires for electrical connection are omitted for the sake of brevity. In FIG. 1, 10 is a rice cooker main body, 11 is an outer cover which covers the opening part of a rice cooker main body. 12 is a pan that can be detachably stored in the rice cooker body 10, and 13 is a heating means for performing electromagnetic induction heating of the pan 12. The heating control board 14 performs current control on the heating means 13, and 15 is an operation board for controlling the heating control board 14. An operation panel 16 for operating the rice cooker is disposed above the operation board 15. By operating a button of the operation panel 16, the heating control board 14 allows the operation panel 16 to operate. By supplying electric current to the heating means 13, the pan 12 is heated by electromagnetic induction so that the food in the pan 12 can be cooked.

  Next, the outer lid 11 is provided with a decorative plate 17 made of a metal such as stainless steel on the outer surface portion of the outer lid 11, and the upper portion of the pot 12 is placed below the outer lid. An inner lid 18 is disposed to cover. The inner lid 18 is configured to be detachable from the outer lid 11 and is configured in consideration of care. Further, the inner lid 18 is provided with a pot packing 19 for sealing with the pan 12, and the steam from the cooked food inside the pan 12 generated during rice cooking / warming is provided at the center of the inner lid 18. A steam passage hole 20 for discharging rice balls (rice soup) is provided, and the steam released from the steam passage hole 20 provided in the inner lid 18 is supplied to the outer lid 11. A steam passage 21 is provided for passing through the neck. At the outermost part of the steam passage 21 of the outer lid, there is disposed a steam cylinder 22 for separating the steam and the rice bowl generated during rice cooking and releasing only the steam to the outside, and the steam cylinder 22 is detachable. A recess 23 for housing is provided on the decorative board 17. A lid heater 24 for heating the inner lid 18 is disposed above the inner lid 18, and the lid heater 24 is placed on a lid heat radiating plate 25. The lid heat sink 25 is made of a material having high thermal radiation, such as aluminum, and is fixed to the outer lid 11 with a pawl 26 or the like. During the cooking process, the lid heater is heated to Due to the heat radiation, the inner lid 18 covering the pan 12 can generate heat and draw out the performance of the cooked food.

  Next, in order to insulate the lid heater 24 and the lid heat radiating plate 25 at the upper part of the heat radiating plate 25, the outer lid 11 is formed with a substantially flat portion 27. In the space 28 formed by the substantially flat portion 27 of the outer lid 11, a lid heat insulating material is disposed in order to further improve the heat insulating performance. A heat insulating space (gap space) 29 is disposed between the substantially flat surface portion 27 of the outer lid 11 and the metal decorative plate 17 on the outer surface portion of the outer lid 11. The height dimension of the heat insulation space 29 is not constant, and the space height dimension is changed depending on the location. Where the height dimension can be secured, for example, the setting is set to 15 mm, and where the height dimension cannot be secured, For example, the setting is 5 mm.

  FIG. 2 is a schematic plan view of the heat insulating space 29 of the outer lid 11. In FIG. 2, ribs 31 for forming several lattices 30 are arranged in the heat insulating space 29. The lattice 30 is provided with a notch 32 at least at one location, and for example, the space between the lattice 30-a and the lattice 30-b is connected. If all such configurations are accommodated in the heat insulating space 29, the lattice 30 can be formed in one large space.

  In such a configuration, the heat of the pan 12, the lid heater 24, and the lid heat radiating plate 25 is stored in the substantially flat portion 27 of the outer lid 11 during rice cooking and heat insulation, and the heat passes through the heat insulating space 29 and is made of metal. Although it becomes the surface temperature of the decorative board 17, in order to improve rice cooking performance, in order to accelerate | stimulate gelatinization of rice, it is necessary to increase the calorie | heat amount given to a cooking item, Therefore, the said heating coil 13 and the lid | cover heater 24 It is necessary to increase the energization amount of rice, and the energization amount is increased in the rice cooking process. However, the temperature of the pan 12, the lid heater 24 and the lid heat radiating plate 25 is increased accordingly, and the temperature of the metal decorative plate 17 is increased. May exceed 55 ° C. and may feel hot when touching the decorative board 17. Therefore, by making different heat insulating spaces 29 between the outer lid 11 and the decorative plate 17, for example, the height of the lattice 30-a in the heat insulating space 29 is set to 5 mm, and the lattice 30 − in the heat insulating space 29. When the height dimension of b is 15 mm, the atmosphere temperature in the lattice 30-a is higher than the atmosphere temperature in the lattice 30-b during rice cooking, and the temperature of the decorative plate 17 above the lattice 30-a. Rises to around 55 ° C., but notches 32 are provided in the ribs 31 between the lattices, and the notches 32 allow the heat in the lattice 30-a to enter the 30-b. It can move and the whole atmospheric temperature in the said heat insulation space 29 can be reduced. Therefore, the temperature of the decorative board provided in the upper part of the heat insulation space 29 can be reduced. However, the outer lid configured with a fixed dimension of 5 mm with a small height dimension in the heat insulating gap 29 is made uniform at a high temperature on the surface portion of the decorative board. Therefore, with the configuration of the outer lid of the present invention, it is possible to provide a rice cooker that can reduce the sensible temperature even if the hand touches the outer lid during rice cooking, and the temperature of the metal decorative board can be reduced. Rice cooking performance can be improved because rice cooking can be performed without consideration. In addition, since it is disposed in the heat insulating space 29 between the outer lid and the decorative plate, the decorative plate 17 is recessed when pressed from the outside, but ribs 31 for forming the lattice 30 are disposed in the heat insulating space 29. However, in order to eliminate the dent, the vertical and horizontal dimensions of the lattice 30 are preferably 20 mm or less, for example.

  Here, the heating source of the outer lid 11 is the lid heater 24, and the implementation of the present invention has been described. However, even if the lid heater 24 is a heating coil, the same effect can be obtained.

  FIG. 3 is a longitudinal sectional view of the outer lid unit of the present invention. In the configuration of the outer lid in FIG. 3, the heat insulating space 29 is disposed between the substantially flat surface portion 27 of the outer lid 11 and the metal decorative plate 17, similarly to the configuration of the outer lid described above. Ribs 31 for forming a lattice 30 are disposed in the heat insulating space 29. Here, a gap 33 is further provided between the metal decorative plate 17 and the rib 31, and a heat insulating material 34 having low thermal conductivity is provided in the gap 33. The material of the heat insulating material 34 is preferably a silicon foam material.

  By taking in such a structure, the temperature of the decorative board 17 during rice cooking and heat retention which is the effect mentioned above can be reduced from the structure mentioned above.

(Embodiment 2)
The rice cooker of Embodiment 2 of this invention is demonstrated using FIG. 4, FIG.

  FIG. 4 is a cross-sectional view of the main part of the outer periphery of the outer lid 11 and the decorative plate 17. In FIG. 4, reference numeral 40 denotes an outer peripheral bent portion of the decorative board 17. The outer peripheral bent portion 40 is disposed on the entire periphery of the decorative board 17. 41 is a groove for accommodating the outer peripheral bent portion 40 of the decorative plate 17, and a rib 42 in contact with the inner surface of the decorative plate 17 is disposed on the inner peripheral portion of the groove 41 of the outer lid 11. The gap is zero. A thin film 43 made of resin is disposed on the inner and outer surfaces of the decorative board 17. As this thin film 43 made of resin, a silicon-based thin film 43 is good against vapor.

  By adopting such a configuration, even when water is applied to the outer lid, there is no gap in the fitting portion between the outer lid 11 and the decorative plate 17, so that water enters the outer lid 11. Therefore, since water does not adhere to electrical parts such as the lid heater 24 disposed inside the outer lid, electrical damage can be avoided. In addition, in the outer peripheral fitting portion of the outer lid 11 and the decorative plate 17, the outer peripheral portion of the outer lid is provided with the rib 42 on the inner peripheral portion of the groove 41 of the outer lid 11 and the decorative plate 17. There is no gap, and a rubbing sound is likely to be generated when the decorative board 17 is pressed. However, by arranging the resin thin film 43 on the inner and outer surface portions of the decorative board 17, the rubbing sound is not generated. In addition, the rust preventive effect of the decorative board 17 can be exhibited.

  FIG. 5 is a cross-sectional view of the main part of the outer lid 11. In FIG. 5, reference numeral 50 denotes a gap provided between the outer lid 11 and the decorative plate 17. Reference numeral 51 denotes a screw for mechanically fixing the outer lid 11 and the decorative plate 17.

  With this configuration, when the outer lid 11 and the decorative plate 17 are mechanically fixed by the screw 51, the gap 50 becomes a tightening allowance when the screw is tightened. Moreover, since the outer peripheral part of the decorative board 17 is contact | abutted by the rib 42 of the outer cover 11 as mentioned above, the said decorative board 17 is compared with the shape before performing mechanical fixation by the said clearance gap 50, The outer peripheral portion of the decorative plate 17 is left as it is, the central portion is deformed to a shape moved downward from the initial shape, and the outer peripheral portion of the decorative plate 17 is always subjected to a force directed downward of the outer lid. Therefore, the difference in dimensional change due to the difference in the linear expansion coefficient between the outer lid 11 and the decorative plate 17 can be absorbed during cooking and heat retention, and the decorative plate 17 can be prevented from being lifted from the outer lid 11. .

  The rice cooker according to the present invention is useful as a rice cooker for home use or business use.

The longitudinal cross-sectional view of the rice cooker in Embodiment 1 of this invention. Schematic plan view of the heat insulating space of the outer lid in Embodiment 1 of the present invention Fig. 3 is a longitudinal sectional view of the outer lid unit according to the first embodiment of the present invention. Cross-sectional view of the main part of the outer periphery of the outer lid in Embodiment 2 of the present invention Cross-sectional view of the main part of the outer lid in Embodiment 2 of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rice cooker main body 11 Outer lid 12 Pan 13 Heating means 17 Decorative plate 29 Heat insulation space (gap space)
30 Lattice 34 Heat Insulating Material 40 Bending Portion of Decorative Plate 41 Groove in Outer Cover 42 Groove in Inner Periphery of Outer Lid 43 Resin Film 50 Gap between Outer Lid and Decorative Plate

Claims (5)

A rice cooker body for detachably storing the pan, a heating means for heating the pan, an outer lid that covers the opening of the rice cooker body, and a metal makeup provided on the outside of the outer lid A gap space formed between the outer lid and the decorative board with at least two height dimensions different from each other, and a lattice-shaped rib provided in the gap space and lacking at least one place A rice cooker characterized by comprising: The rice cooker according to claim 1, wherein a heat insulating material is disposed between the top surface of the rib and the decorative plate. A bent portion provided on the outer peripheral edge of the decorative plate, a groove portion provided on the outer lid and fitted to the bent portion, and a rib provided on the outer lid and adjacent to the groove portion and contacting the decorative plate. The rice cooker of Claim 1 characterized by the above-mentioned. The rice cooker according to claim 1, wherein the gap provided in the center of the outer lid has a height that can be varied before and after the machine is fixed. The rice cooker according to claim 1, wherein a resin film is disposed on the inner and outer surface portions of the decorative plate.

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