JPH05309036A - Rice cooking heater for electric rice cooker - Google Patents

Abstract

PURPOSE:To prevent the rice cooking heater from being over-heated, deformed and melted, in the electric rice cooker. CONSTITUTION:On a rice cooking heater 3 in which a sheath heater 2 is cast into the outside peripheral part, a pot 1 is placed, and in the center part of the rice cooking heater 3, a through-hole is provided and a pot temperature sensor 5 is provided, and on the lower face of the rice cooking heater 3, a radiation fin 7 is provided between the center part and the sheath heater 2. By the radiation fin 7, it is suppressed that the rice cooking heater 3 becomes a high temperature, and it can be prevented that the heater is deformed and melted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker for an electric rice cooker mainly used at home.

[0002]

2. Description of the Related Art In recent years, the electric power of heaters for cooking rice has been increased so that delicious rice can be cooked. Conventionally, this kind of electric rice cooker generally has a structure as shown in FIG. In FIG. 5, 21 is a pot, 22 is a sheathed heater, and 23 is a rice cooking heater. The pot 21 for putting rice and water is placed on an aluminum-made rice cooking heater 23 in which a ring-shaped sheathed heater 22 is cast. It is placed in contact. In the above configuration, when rice cooking is started, the sheath heater 22 is energized to generate heat, and the pan 21 is heated via the rice cooking heater 23 to cook rice.

[0003]

However, in the above-mentioned conventional electric rice cooker, when foreign matter such as rice grains enters between the pot 21 and the rice cooking heater 23, the contact between the pot 21 and the rice cooking heater 23 deteriorates, and the rice cooking There is a problem that the heat of the heater 23 becomes difficult to be transferred to the pan 21, and when the rice cooking heater 23 reaches a high temperature and reaches about 500 ° C., it is deformed and melted. The present invention solves the above-mentioned conventional problems. First, even if foreign matter enters between the pan and the rice cooking heater, it is prevented from being heated to a high temperature to prevent deformation and melting. Secondly, another object of the present invention is to provide a rice cooker for an electric rice cooker that prevents malfunction of a sensor for detecting pot temperature while suppressing the temperature of the rice cooker from becoming high.

[0004]

In order to achieve the above first object, the present invention relates to an electric rice cooker main body, a pan which is detachably housed in the main body, and a sheathed heater cast on the outer peripheral portion of the pan. Is provided with a rice cooking heater for heating the above, and the pan is placed on the upper surface, and a radiation fin is provided on the lower surface between the central portion and the sheath heater. Further, in order to achieve the second object, a through hole is provided in the central portion to provide a pan temperature detecting sensor, and no heat radiation fin is provided only near the pan temperature detecting sensor.

[0005]

According to the present invention, with the above construction, since the radiation fins are provided on the lower surface of the rice cooking heater, it is possible to prevent the rice cooking heater from reaching a high temperature. Moreover, since the heat radiation fin is not provided only near the pan temperature detection sensor, malfunction of the pan temperature detection sensor is prevented.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3, 1
Is a pan, 2 is a sheath heater, 3 is a rice cooking heater, 4 is a lid,
Reference numeral 5 is a pan temperature sensor, 6 is a control board, 7 is a radiation fin, and the pan 1 for putting rice and water is placed on the rice cooking heater 3 made of aluminum in which the sheath heater 2 is cast. A lid 4 that can be opened and closed is provided on the upper portion of the main body. The pot temperature sensor 5 is provided in a through hole at the center of the rice cooking heater 3 so as to detect the temperature at the center of the bottom of the pot 1. The control board 6 receives a signal output from the pan temperature sensor 5 as an input and controls energization of the sheath heater 2. Radiating fins 7 are provided on the lower surface of the rice cooking heater 3 at eight locations from the central portion toward the sheath heater 2 on the outer peripheral portion.
The operation of the electric rice cooker having the above configuration will be described. In normal rice cooking, since the rice cooking heater 3 is firmly in contact with the pan 1, the heat of the rice cooking heater 3 is surely transferred to the pan 1.
Therefore, the temperature of the rice cooking heater 3 is suppressed to about 180 ° C. However, when foreign matter such as rice grains enters between the rice cooking heater 3 and the pan 1, the heat of the rice cooking heater 3 is less likely to be transferred to the pan 1, so that the temperature of the rice cooking heater 3 sharply rises, and the rice cooking heater 3 operates. Although the temperature tends to become high, the radiation fins 7 increase the surface area of the rice cooking heater 3 to easily radiate heat, and suppress the temperature from becoming high.

FIG. 4 shows a cross section of a rice cooking heater of an electric rice cooker according to another embodiment of the present invention. In FIG. 4, 8 is a pan temperature sensor, 9 is a rice cooking heater, 10 is a through hole, 11 is a radiating fin, and a radiating fin 11 is provided near the through hole 10 of the rice cooking heater 9 provided with the pan temperature sensor 8. I try not to. According to the above-described embodiment, since the heat radiation fins 11 are not provided near the pan temperature sensor 8, even if the temperature of the rice cooking heater 9 rises, the heat released by the heat radiation fins 11 does not easily affect the pan temperature sensor 8. .

[0008]

As is apparent from the above embodiments, according to the present invention, since the radiation fins are provided in the lower portion of the rice cooking heater, the rice cooking heater is heated to a high temperature even if foreign matter such as rice grains enter between the pan and the rice cooking heater. To prevent the rice cooking heater from deforming and melting. Further, according to the present invention, since the radiation fin is not provided near the pot temperature sensor, the pot temperature sensor is less affected by heat as compared with the case where the radiation fin is also provided near the pot sensor, and the pot temperature sensor malfunctions. It has the effect of preventing

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an electric rice cooker according to an embodiment of the present invention.

FIG. 2 is a sectional view of a rice cooking heater of an electric rice cooker according to an embodiment of the present invention.

FIG. 3 is a bottom view of the rice cooking heater of the electric rice cooker according to the embodiment of the present invention.

FIG. 4 is a sectional view of a rice cooking heater of an electric rice cooker according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional electric rice cooker.

[Explanation of symbols]

1,21 ... pan, 2,22 ... season heater, 3,9,23 ...
Rice cooker, 4 ... lid, 5, 8 ... pan temperature sensor,
6 ... Control board, 7, 11 ... Radiating fins, 10 ... Through hole.

Claims (2)

[Claims] 1. An electric rice cooker main body, a pan that is detachably accommodated in the main body, a rice cooker heater that heats the pan by casting a sheath heater on the outer peripheral portion, and the pan is placed on the upper surface and the lower surface. Is a rice cooker for an electric rice cooker with a radiation fin between the center and the sheath heater. 2. The rice cooker for an electric rice cooker according to claim 1, wherein a through-hole is provided in the center portion to provide a pan temperature detecting sensor, and no radiation fin is provided only near the pan temperature detecting sensor.