JP3573728B2 - Body heater structure in electric rice cooker - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat retaining structure in an electric rice cooker, particularly to a structure of an inner body heater functioning as a heat retaining heater.
[0002]
[Prior art]
As a general structure of an electric rice cooker, a rice cooker is cooked by heating a kettle by a heating mechanism arranged at an inner bottom portion of the rice cooker main body, and after cooking, an inner body heater arranged on the inner body and / or an upper surface of the cooker. There is known a device in which cooked rice is kept at a constant temperature by a radiator heater arranged on a cover that covers the rice. As for the inner body heater for heating the inner body or a protective frame corresponding to the inner body, usually a linear heater is arranged on the outer surface of the inner body, and the pot stored in the inner body is heated from the side.
Japanese Patent Application Laid-Open No. 8-24125 discloses that a side surface of a pot can be heated as uniformly as possible by an inner body heater disposed on the outer surface of the inner body, in other words, a wide range of the inner body can be heated. As shown in FIG. 6A, the idea of arranging the body heater A in a waveform as shown in FIG. 6A and the idea of arranging the body heater A in a folded manner as shown in FIG. 6B are disclosed.
[0003]
[Problems to be solved by the invention]
It was found that if the rice after cooking was kept warm, there would be variations such as a dry portion and a whitened portion in the pot. Since this phenomenon is caused by a partial temperature variation in the kettle, the problem cannot be solved only by controlling the entire temperature accurately. In view of such circumstances, the present invention has devised a body heater structure that can maintain the temperature of rice in a kettle, particularly a surface that is liable to deteriorate, at an optimal temperature as much as possible, and keep the temperature in a delicious state without deterioration. It is.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the pot 3 is removably accommodated in a space formed by the heating mechanism and the inner body 2 in the rice cooker main body 1, and the upper part of the pot 3 is covered with a lid 4 which can be opened and closed. In the electric rice cooker which cooks the rice by heating at the same time and keeps the cooked rice by the body heater 5 arranged on the outer surface of the inner body 2, a high-temperature region approaching a heat-generating member in the vessel such as an operation panel is The body heater 5 was arranged on the outer surface of the inner body 2 so that the low temperature area at a low position, which was remote from the heat generating member, was at a high position. With this configuration, it is possible to eliminate the variation in the temperature of the rice during the heat retention, especially the surface temperature, and to maintain the temperature as a whole at the optimal temperature for the heat retention.
[0005]
In the rice cooker, a heat radiating plate 6 in which a linear heat radiating plate heater 7 is adhered in a meandering state is disposed on the inner surface of a lid 4 that covers the upper surface of the pot 3 so as to prevent dew condensation on the inner surface of the lid and combine with the body heater 5. In some cases, the cooked rice is kept warm by heating the radiator heater 7. In such a case, in consideration of the overall balance between the heat of the heat sink heater 7 and the heat of the body heater 5, the body corresponding to the high-temperature region of the heat sink 6 generated due to the meandering state of the heat sink heater. It is preferable that the heater is arranged at a low position of the inner body, and the body heater corresponding to the low temperature region is arranged at a high position of the inner body.
[0006]
If a linear body heater is attached to a wide adhesive tape according to a pattern that moves up and down, and this adhesive tape is attached to the inner and outer surfaces of the body, efficient production can be performed in a precise positional relationship. Can be. The area where the body heater is arranged at a low position of the inner body may be one place in the entire circumference which is close to the high temperature area where the operation panel and its control board are arranged. In the case where the heat generating member is disposed, the body heater may be moved to the low position and the high position at a plurality of positions of the inner body in correspondence with the plurality of high temperature regions.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an inner body heater structure in an electric rice cooker according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a side view of the entire electric rice cooker with a part cut away. This electric rice cooker removably accommodates a pot 3 in a space formed by a heating plate 9 of a rice cooker 8 which is a heating mechanism disposed at an inner bottom portion of the rice cooker body 1 and an inner body 2, and above the pot 3. Is covered with a lid 4 that can be opened and closed, and cooking of cooked rice is performed by heating control of the cooked rice heater 8.
[0008]
A heat radiating plate 6 provided with a heat radiating plate heater 7 on the inner surface (lower surface) facing the cooking pot 3 is disposed on the lid 4 covering the upper surface of the cooking pot 3, and a packing 10 attached to the heat radiating plate 6 is attached to the upper end edge of the cooking pot 3. By making them close together, the space inside the pot is sealed, so that rice can be cooked efficiently. In addition, steam and oneva generated during rice cooking pass through a steam discharge mechanism 12 from a through hole 11 formed in the heat radiating plate 6 and are discharged outside the machine. The electric rice cooker in the illustrated example is composed of a large-capacity rice cooker 8 as heating means for cooking rice and a heating plate 9 formed into a shape into which the bottom of the pot is fitted, but is composed of a protective frame and an electromagnetic induction coil. An electromagnetic heating rice cooker may be used. Further, the rice cooking heater 8 may be provided not only at the bottom but also at the corner from the kettle 3 to the side.
[0009]
The cooked rice is kept at an appropriate temperature by the body heater 5 attached to the outer surface of the inner body 2. A linear heater is used as the body heater 5 mounted on the outer surface of the inner body 2, and the heater is attached to the outer surface of the inner body 2 using a heat-resistant adhesive tape 13 such as aluminum foil. On the other hand, the main purpose of the radiator plate heater 7 is to prevent dew condensation from occurring on the inner surface of the lid 4 while keeping the temperature, but the heat of the radiator plate heater 7 also functions as a part of the heater for keeping the temperature. FIG. 5 is a plan view showing an example of the heat sink 6.
[0010]
The electric rice cooker usually includes a control device, a display device 14, and a control board 15 thereof. Since these control devices generate a certain amount of heat, they become heat sources in the rice cooker main body 1 and cause a partial rise in the temperature of the pot 3 during the heat retention. Of course, if any device that generates heat is provided inside the rice cooker main body 1 in addition to the control device and the display device 14, the portion of the pot 3 close to the device will be heated to some extent. In this state, when the body heater 5 is uniformly heated over the entire circumference, the temperature of a portion close to a device that generates heat, such as the control device or the display device 14, becomes high. As a result, even if an attempt is made to maintain the temperature of the entire pot 3 by the temperature control means at a temperature suitable for keeping the temperature, the temperature will be partially varied, and the rice will be dried or whitened.
[0011]
Therefore, in the high temperature region H approaching the heat generating member 16 shown in FIG. 3, the linear body heater 5 is attached to a low position on the outer surface of the inner body 2 as shown in FIG. A region other than the high-temperature region H shown in FIG. 3 is defined as a low-temperature region L, and the low-temperature region L is adhered to a high position on the inner and outer surfaces of the body heater 5. Thereby, the surface of the rice stored in the pot 3 is uniformly heated as a whole.
[0012]
FIG. 4 is a plan view showing an example of the heat sink 6 mounted on the inner surface of the lid. The radiator plate heater 7 attached to the radiator plate 6 is not always arranged so that the entire surface is uniformly heated due to the structure of the lid or the reason for processing the radiator plate heater. In the radiator plate 6 of the illustrated example, the range indicated by the arrow L 'is a low-temperature region of the radiator plate, and the remaining portion is a high-temperature region H'. Since the rice surface facing the low-temperature region L 'may have a low temperature, the body heater 5 corresponding to this portion may be arranged at a higher position on the inner body.
[0013]
At this time, the low-temperature region L 'and the high-temperature region H' of the radiator plate 6 do not always coincide with the low-temperature region L and the high-temperature region H inside the rice cooker main body due to the effect of the heat-generating member described above. Therefore, the range and position where the position of the body heater 5 to be attached to the outer surface of the inner body is raised and lowered are determined by comprehensively considering the influence of the heat-generating member in the rice cooker main body and the influence of the heat sink heater. Is preferred.
[0014]
The amount of heat supplied does not change by changing the sticking position of the body heater up and down. However, the exothermic member in the rice cooker main body 1 mainly raises the temperature of the upper part of the inner trunk. Therefore, in the high temperature area H, the lower part of the pot 3 in which the rice is stored is heated, and in the low temperature area L, the upper part of the pot 3 is heated. When the bottom of the pot is heated, the heat is transmitted to a wide range of the rice in the pot, and when the top of the pot 3 is heated, the surface of the rice in the pot is heated. Therefore, by disposing the body heater 5 in the high temperature region at the low position and the body heater 5 in the low temperature region at the upper position, the heat generated by the heat generating member 16 in the rice cooker body 1 and the heat generated by the body heater 5 are summed. The surface of the rice in 3 can be maintained at a uniform temperature over the entire surface.
[0015]
In order to attach a linear heater to the outer surface of the inner body 2, a heat-resistant adhesive tape 13 such as aluminum foil coated with an adhesive on one side is used. If a linear heater is attached to an adhesive tape in advance in accordance with an arrangement pattern, and this is attached to the outer surface of the inner body 2, the body heater 5 can be efficiently arranged at a predetermined position. Can be. Of course, the body heater may be arranged by another method, for example, by fixing the body heater while arranging it on the outer surface of the inner body.
[0016]
FIG. 5 is a developed view showing an arrangement pattern of a linear heater used as a body heater. FIG. 5A shows a state in which the body heater 5 is set at a low position in one central portion of the wide adhesive tape 13 in correspondence with the high-temperature region H, and the body heater 5 is arranged at a high position in other portions. I have. FIG. 5B shows a case in which the body heater 5 is arranged at a low position corresponding to a wide area on the right side of the drawing corresponding to a high temperature area, and the body heater 5 is arranged at a high position corresponding to a small area on the left side corresponding to a low temperature area. ing. FIG. 5C shows the case where the linear body heater 5 is arranged at a low position so that the narrow area at the center corresponds to the high-temperature area H as in FIG. The body heater 5 is fixed by using a tape 13 so as to move up and down according to an arrangement pattern.
[0017]
FIG. 5D shows the case where the body heater is arranged at a low position with the central fixed range as a high-temperature region H, as in the case of FIG. 5A, and the left and right sides are inclined upward. , The body heater 5 is arranged. Figure 5 (e) is made to correspond to the high temperature region of the two portions of an H ₁ and H _2, shows an example of arranging to move the cylinder heater 5 up and down. Of the above-mentioned body heater patterns, in all cases except for FIG. 5 (c), a state is shown in which the tape is attached to the outer surface of the inner body using a wide adhesive tape.
[0018]
In the arrangement pattern in which the body heater 5 moves up and down, the up and down movement width does not need to be so large. The body heater at the high position heats the side of the pot near the surface of the rice contained in the pot 3, and the body heater 5 at the low position provides the surface of the rice contained in the pot. This is because it is only necessary to heat the side of the pot below. When the side of the pot above the surface of the stored rice is heated, the pot tends to become hotter than necessary. Therefore, a sufficient effect can be exhibited when the width of moving the body heater 5 up and down is within a range of 100 mm or less.
[0019]
The body heater 5 arranged on the outer surface of the inner body is not limited to one in which a linear heater is attached to the inner body, and a heater in which a linear or non-linear heater is arranged close to the inner body outer surface. There may be. Also in this case, the surface of the rice in the kettle can be kept as constant as possible by keeping the body heater arranged close to the outer surface of the inner body and moving up and down, so that the temperature can be kept with little deterioration.
[0020]
【The invention's effect】
According to the inner body heater structure of the electric rice cooker according to the first aspect of the present invention, even if the heat-generating member is arranged inside the rice cooker main body, the temperature of the kettle is stored, particularly in the rice cooker. The surface temperature of the rice can be maintained at a constant temperature with little variation throughout. For this reason, the conventional disadvantage that rice in the pot is partially dried or whitened can be solved.
[0021]
According to the second aspect of the present invention, even if the heat radiating plate heated by the heat radiating plate heater is disposed on the inner surface of the lid, the heat radiating plate is accommodated in the rice cooker main body in consideration of the influence of the heat radiating plate heater. The temperature of the pot can be kept constant to prevent deterioration of the rice while keeping it warm.
[0022]
According to the third aspect of the present invention, a linear heater is used as the body heater, which can be easily arranged in a predetermined pattern that moves up and down.
[0023]
According to the invention as set forth in claim 4, the position of the heater is changed at one position of the body heater with respect to the influence of heat generated by the operation panel and the control board thereof, which are heat generating members inside the rice cooker main body. The temperature of the rice can be maintained at a uniform temperature as a whole, thereby preventing deterioration of the rice during the heat retention.
[0024]
According to the fifth aspect of the present invention, even when the heat-generating members in the rice cooker main body are scattered at a plurality of positions, the temperature of the pot is maintained at a uniform temperature as a whole, and the quality of the rice being kept warm is deteriorated. Can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view of the entire rice cooker with a part cut away,
FIG. 2 is a lower perspective view of the body heater, in which a linear heater is adhered to the outer surface as the body heater;
FIG. 3 is a plan view showing the relationship between the arrangement of heat-generating members in the rice cooker main body and the inner body;
FIG. 4 is a plan view showing an example of a heat sink.
FIG. 5 is a development view showing an arrangement pattern when a linear heater is used as a body heater;
FIG. 6 is a development view showing an example of a conventional body heater arrangement pattern.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Rice cooker main body, 2 ... Inner trunk, 3 ... Kettle, 4 ... Lid, 5 ... Body heater, 6 ... Heat sink, 7 ... Heat sink heater, 8 ... Rice cooker, 9 ... Heating plate, 10 ... Packing, 11 ... through-hole, 12 ... discharge mechanism, 13 ... adhesive tape, 14 ... display device, 15 ... control board, 16 ... heat-generating member, H, H '... high temperature area, L, L' ... low temperature area.

Claims (5)

A pot is detachably housed in the space formed by the heating mechanism and the inner body in the rice cooker body, and the upper part of the pot is covered with an openable and closable lid. In the electric rice cooker which keeps the rice cooked by heating the body heater arranged on the outer surface of the rice cooker,
The body heater is arranged on the inner and outer surfaces of the body such that the high temperature area approaching the heat generating member in the container such as the operation panel is at a low position, and the low temperature area away from the heat generating member is at a high position. Body heater structure in electric rice cooker. On the inner surface of the lid that covers the top of the pot, a radiating plate with a linear radiating plate heater attached in a meandering state is arranged, and the body heater corresponding to the high-temperature area of the radiating plate is placed in a low position from the meandering state of the radiating plate heater. 2. The body heater structure of an electric rice cooker according to claim 1, wherein the body heater is arranged on the inner and outer surfaces of the body so that the body heater corresponding to the low temperature region is at a high position. 3. A linear body heater is attached to a wide adhesive tape in accordance with a pattern for moving up and down, and the adhesive tape to which the body heater is attached is attached to the inner and outer body surfaces. A body heater structure in the electric rice cooker described in the above. The electric rice cooker according to any one of claims 1 to 3, wherein the region where the body heater is arranged at a low position of the inner body is one of the entire circumferences which is close to the high temperature area where the operation panel and its control board are arranged. Body heater structure in The body heater structure in an electric rice cooker according to any one of claims 1 to 3, wherein a region where the body heater is arranged at a low position and a region where the body heater is arranged at a high position are a plurality of positions.

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