JPH0759215B2 - rice cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rice cooker, and more particularly to a mounting structure of a lid heater disposed inside a lid of a rice cooker.

[Prior Art] FIG. 2 is a side view showing a partial cross section of a main part of a conventional rice cooker. In the figure, 1 is a rice cooker main body, 2 is a lid that covers an upper opening of the rice cooker main body 1, 3 is an inner pot accommodated in the rice cooker main body 1, 4 is a lid heater provided inside the lid 2. The nichrome wire, 5 is a tape, 6 is a radiator plate attached to the lower surface of the lid 2, 7 is an inner lid, 8 is a shaft for fixing the inner lid 7, and 9 is a spacer.

As shown in the figure, the lid heater with an output of about 10 watts and a small amount of heat generation has a structure in which the nichrome wire 4 is attached to the upper surface of the heat dissipation plate 6 with tape 5, and the inner lid 7 is a spacer 9 It is attached to the lower side of the heat dissipation plate 6 by means of the inner lid fixing shaft 8. When the rice in the inner pot 3 is cooked up, the nichrome wire 4 of the lid heater is energized, and the heat is transferred to the inner pot 3 through the heat radiating plate 6 and the inner lid 7 to cook the cooked rice. Keep warm.

[Problems to be Solved by the Invention] In the conventional rice cooker as described above, a heater (not shown) provided at the bottom of the rice cooker body 1 for heating the inner pot 3 containing rice.
The lid heater installed inside the lid was used only for heat retention, and the output was about 10 watts and the amount of heat generated was small. However, in order to cook rice deliciously, it is necessary to heat the inner pot 3 not only from below, but also from the side and above. Therefore, it is necessary to use the lid heater that was mainly used only for heat retention during rice cooking or purging, and to strengthen its output from the conventional 10 watts to, for example, 60 to 80 watts. It was necessary to improve the mounting parts and the like.

The present invention has been made to solve the above problems, and provides a rice cooker that can stably and reliably attach a lid heater with a large output to improve heating efficiency and cook delicious rice. The purpose is to do.

[Means for Solving the Problems] A rice cooker according to the present invention is mounted by a lid heater disposed inside a lid, a heat radiating plate that covers a lower surface of the lid heater, and a shaft for fixing an inner lid below the heat radiating plate. In a rice cooker equipped with a lid, the lid heater is formed in a disk shape having a convex central portion and a flange portion on the outer periphery, and the lid heater is disposed in a concave portion provided in the central portion of the heat dissipation plate. Fixed by a holding plate having a ring-shaped holding portion for holding the flange portion of the lid heater and mounting portions extending on both outer peripheral sides of the holding portion, and two inner lid fixing shafts for fixing the inner lid. It is a thing.

[Operation] In the present invention, the lid heater is formed in a disk shape having a convex center portion and a flange portion on the outer periphery, and the lid heater is disposed in the recess portion provided in the central portion of the heat radiating plate. The lid heater is fixed by a pressing plate having a ring-shaped pressing portion for pressing the flange portion and mounting portions extending on both sides of the outer periphery of the pressing portion, and two inner lid fixing shafts for fixing the inner lid. Can be installed in the recess of the heat sink in a stable and reliable manner to improve heating efficiency and cook rice deliciously. Further, since the shaft for fixing the inner lid is used for fixing the lid heater to the heat dissipation plate, the cost can be reduced.

[Embodiment] FIG. 1 is a plan view of the lid of a rice cooker showing the embodiment of the present invention from the back surface, and FIG. Incidentally, the same parts as those of the conventional example described in FIG. In the figure, reference numeral 10 denotes a disk-shaped lid heater having a convex portion in the central portion and a flange portion 10a on the outer periphery, which is disposed in a concave portion 6a provided in the central portion of the heat dissipation plate 6. Further, the output of the lid heater 10 is enhanced to, for example, 60 watts. Reference numeral 11 denotes a holding plate composed of a ring-shaped holding portion 11a for holding the flange portion 10a of the lid heater 10 and mounting portions 11b extending on both sides of the outer periphery of the holding portion 11a. As described above, it is made of, for example, a stainless steel plate having heat resistance.
12 is a thermal fuse, 13 is a mounting plate of the thermal fuse 12, 14 is a cable, and these constitute an overheat prevention device.The thermal fuse 12 is arranged in the vicinity of the lid heater 10, and When the temperature in the vicinity reaches 188 ° C. or higher, the thermal fuse 12 functions to shut off the power supply to the lid heater 10 and prevent the lid 2 from overheating.

In the embodiment configured as described above, when the lid heater 10 is attached to the inside of the lid 2, first, the flange portion of the lid heater 10 is first attached.
The heat sink 6 is housed in the recess 6a with the side 10a facing downward. Next, the mounting portions 11b of the pressing plate 11 are fixed to the two inner lid fixing shafts 8 provided on the heat dissipation plate 6, respectively. At this time, the flange portion 10a of the lid heater 10 is firmly and evenly pressed by the holding portion 11a of the holding plate 11, so that the lid heater 10
Is stably fixed in the recess 6a of the heat dissipation plate 6.

In this way, the disk-shaped lid heater 1 having the collar portion 10a on the outer periphery is provided.
Since 0 is installed in the concave portion 6a provided in the central portion of the heat dissipation plate 6, it is possible to heat only one side (downward) when cooking rice or fluffing.
Not only from the other side but also from the other side (above), the heat of the lid heater 10 can be transferred in a well-balanced manner, and since the lower surface of the lid heater 10 is close to the object to be heated in the inner pot 3, It is possible to improve the heating efficiency of the heated product. Also, since the lid heater 10 is formed in a disc shape,
The parts are easy to process and easy to handle.

Further, since the lid heater 10 is fixed by using the pressing plate 11 and the inner lid fixing shaft 8, and the holding plate 11 is fixed to the inner lid fixing shaft 8, the cost can be reduced. Further, since the inner lid fixing shaft 8 is provided at the symmetrical position of the lid heater 10, it is possible to stabilize the holding of the lid heater 10 and to secure its performance even if one caulking is loose, and the holding plate Since the mounting portion 11b of 11 is extended to the outer circumference of the heat dissipation plate 6, the influence of the heat of the lid heater 10 is small and the durability of caulking can be improved. Further, since the lid heater 10 is attached to the radiator plate 6 with no gap by the ring-shaped pressing portion 11a, heat transfer is stable, heating can be performed in a well-balanced manner, and delicious rice can be cooked.

In addition, although the temperature fuse 12 is used for the overheat prevention device in the above-described embodiment, the invention is not limited to this and can be appropriately changed as long as it has a similar action.

[Advantages of the Invention] As described above, in the rice cooker according to the present invention, the lid heater is formed in a disk shape having a convex central portion and a flange portion on the outer periphery, and is disposed in the concave portion provided in the central portion of the heat radiating plate. Then, for the lid heater, a holding plate having a ring-shaped holding portion for holding the flange portion of the lid heater and mounting portions extending on both sides of the outer periphery of the holding portion, and two inner lids for fixing the inner lid. Since it is fixed by the shaft, the lid heater can be attached stably and surely. Further, the influence of the heat of the lid heater is small, and the durability of caulking can be improved, and further, the cost can be reduced. Further, since the lid heater is fixed to the heat dissipation plate without a gap, heat transfer is stabilized, heating efficiency can be improved, and delicious rice can be cooked.

[Brief description of drawings]

FIG. 1 is a plan view of the radiator plate of the rice cooker showing the embodiment of the present invention from the back surface, FIG. 1 (b) is a side cross-sectional view of the main part thereof, and FIG. 2 is a schematic view of a conventional rice cooker. It is the side view which showed the part in one part cross section. In the figure, 2 is a lid, 6 is a heat dissipation plate, 6a is a recess, 7 is an inner lid, 8 is a shaft for fixing the inner lid, 10 is a lid heater, 10a is a flange portion, 11 is a holding plate, 11a is a holding portion, 11b. Is a mounting part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Shimatani 1728, Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Appliances Co., Ltd. (72) Tomoaki Okuse 1728 1-Omaeda, Hanazono, Saito-gun Mitsubishi Electric Home Equipment Co., Ltd. (72) Hiroaki Tsukahara, Inventor Hiroaki Tsukahara, 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama Prefecture 1 Mitsubishi Electric Home Equipment Co., Ltd. (72) Hiroshi Nakamura 1728, Omaeda, Hanazono-cho, Saitama-gun Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Takao Oshima 1728 Omaeda, Ozoda, Hanazono Town, Saitama Prefecture Mitsubishi Electric Home Equipment Co., Ltd. (56) References Application No. 60-136693 (Actual development No. 62- No. 43526), a microfilm (JP U) Micro Application (JP, U) Practical Application Sho 52-130478 (Actual) Micro film (JP, U) of the contents and drawings attached to the application for the application (Kaisho 54-58968)

Claims (1)

[Claims] 1. A rice cooker comprising a lid heater disposed inside a lid, a heat radiating plate covering a lower surface of the lid heater, and an inner lid mounted below the heat radiating plate by a shaft for fixing the inner lid. In the above, the lid heater is formed in a disk shape having a convex portion at the central portion and a flange portion on the outer periphery, and is disposed in a recessed portion provided in the central portion of the heat dissipation plate, and the lid heater is provided at the collar portion of the lid heater. The rice cooker is characterized in that it is fixed by a holding plate having a ring-shaped holding portion for holding down and a mounting portion extending on both sides of the outer periphery of the holding portion, and two inner lid fixing shafts for fixing the inner lid. vessel.