JP2870879B2 - Electric rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to an electric rice cooker that cooks rice by heating rice in a pan with a heating means.

(Prior Art) Generally, in this type of electric rice cooker, a rice cooker is accommodated in a pot accommodating portion of the rice cooker main body, and the rice cooker is heated by a heater as a heat sensing means. I have. And, in order to improve the cooking unevenness during rice cooking,
As can be seen in JP-A-63-171515, a radiating plate provided with a heater is provided horizontally on the inner bottom of the pot housing so as to be spaced apart from the outer bottom surface of the pan, and the radiant heat from the radiating plate is used to heat the pan. Heating devices have been proposed.

(Problems to be Solved by the Invention) However, as described above, in the electric rice cooker in which the heat radiating plate is horizontally arranged on the inner bottom portion of the pot housing portion, when foreign matter such as rice grains falls on the upper surface of the heat radiating plate. In addition, this is carbonized by the heat generated by the heater and becomes solid dust,
Such dust falls down from the peripheral edge of the upper surface of the heat radiating plate and accumulates during the cleaning or the movement of the rice cooker. If dust accumulates on the lower side of the heat radiating plate, it becomes difficult to remove the dust, and the dust lowers the reflectance of the heat radiating plate for reflecting heat upward, thereby deteriorating the rice cooking performance. There are difficulties.

The present invention has been made in view of such a point,
An object of the present invention is to provide an electric rice cooker which can prevent dust from falling from the upper surface of a heat radiating plate to a lower portion thereof and can easily clean and remove the dust.

[Constitution of the Invention] (Means for Solving the Problems) In order to achieve such an object, the present invention provides a rice cooker main body having a pot accommodation section, a pot accommodated in the pan accommodation section, and this pot. A plate-shaped heat radiation plate provided on the lower side of the outer bottom surface of the heat radiation plate, and an opening for inserting a heat-sensitive cylinder formed at the center of the heat radiation plate and having a temperature sensor for detecting the temperature of the pan, In the apparatus having a heating means provided below the plate, an outer peripheral edge and an inner peripheral edge of the heat radiating plate are provided with rising portions projecting upward therefrom.

(Operation) When foreign objects such as rice grains fall onto the heat dissipation plate when inserting or removing the pot from the pot storage part, and this is carbonized into solid dust, the heat dissipation plate Since the rising portions are formed at the outer peripheral edge and the inner peripheral edge of the radiating plate, the rising portions prevent the dust from falling and do not enter the lower side of the heat radiating plate. A decrease in efficiency can be prevented. The dust remaining on the heat radiating plate can be easily cleaned and removed with a cloth or the like in a state where the pan is taken out of the pan housing portion.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In the figure, reference numeral 1 denotes a rice cooker main body, and a bottomed cylindrical inner frame 2 is provided inside the rice cooker main body 1, and the inner frame 2 constitutes a pot accommodating portion 3. A cooking pot 4 made of a metal having excellent thermal conductivity such as aluminum is removably accommodated in the pot accommodating portion 3.

A heating unit 5 is provided at the inner bottom of the pan storage unit 3,
The heating unit 5 includes a heat radiating plate 6 formed of a stainless steel metal having excellent high-temperature corrosion resistance, and a sheath heater 7 as a heating means integrally attached to the lower surface of the heat radiating plate 6 by, for example, Ni brazing. It is configured. The heat radiating plate 6 has a disk shape and has an opening 8 in the center thereof. A coating layer formed by spraying ceramic such as alumina or zirconia on the upper surface of the heat radiating plate 6 in order to improve the radiation effect and improve the appearance. 9 is given.

The sheathed heater 7 is spirally bent and mounted on the lower surface of the heat radiating plate 6 so as to be arranged almost uniformly. On the outer peripheral edge and the inner peripheral edge of the heat radiating plate 6, rising portions 10, 11 protruding upward are formed integrally so as to be continuous along the peripheral edge.

A holding tube 13 is provided at the center of the inner bottom of the pot housing portion 3, and the holding tube 13 projects above the heat radiation plate 6 through the opening 8, and a heat-sensitive tube 14 is vertically movable in the holding tube 13. The temperature sensor 15 is stored inside the upper end face of the
Is attached. The heat-sensitive cylinder 14 is elastically urged upward by a spring 16 and projects from the upper end surface of the holding cylinder 13 with this urging force to abut on the center of the outer bottom surface of the pan 4. Reference numeral 15 detects the temperature of the pan 4, and based on this detection, the energization of the sheathed heater 7 is controlled. Reference numeral 16 denotes a lid that opens and closes the opening at the upper end of the pan 4.

When cooking rice, the pot 4 is taken out of the pot storage section 3 and a predetermined amount of rice and water are stored in the pot 4.
Then, the pan 4 is inserted into the pan accommodation section 3, the opening at the upper end thereof is closed with the lid 16, and the sheath heater 7 is energized in this state. This energization causes the sheath heater 7 to generate heat, and radiant heat is radiated from the upper surface of the heat radiating plate 6. The radiant heat heats the pot 4, and after a required time has elapsed, rice cooking is completed.

By the way, when the pan 4 is inserted into and removed from the pan storage section 3, foreign matters such as rice grains fall on the heat radiating plate 6, which is carbonized by the heat of the sheath heater 7 to become solid dust. In the prior art, there has been a problem that the dust falls from the peripheral edge of the heat radiation plate 6 to a lower portion thereof. However, in the present invention, the rising portions 10 and 11 are integrally formed on the peripheral edge of the heat radiation plate 6. Therefore, the rising portions 10 and 11 prevent the fall of dust, so that the dust does not enter the lower side of the heat radiating plate 6, so that a decrease in the reflection efficiency of the heat radiating plate 6 can be prevented. The dust remaining on the heat radiating plate 6 can be easily cleaned and removed with a cloth or the like in a state where the pan 4 is taken out of the pan housing portion 3.

On the other hand, when the user takes out the pot 4 from the pot housing portion 3 and looks at the inner bottom portion of the pot 4, when the gap 1 between the outer peripheral edge of the heat radiation plate 6 and the inner wall surface of the inner frame 2 is large, Although anxiety that an object is likely to be dropped in the gap 1 occurs, in the present embodiment, the rising section 10 is formed on the outer peripheral edge of the heat radiation plate 6, so that the gap l appears to be narrowed. There is an advantage that anxiety can be reduced.

[Effect of the Invention] As described above, according to the present invention, the outer peripheral edge and the inner peripheral edge of the heat radiating plate horizontally disposed on the inner bottom of the pan housing portion are provided with the rising portions projecting upward therefrom. Even if foreign matter such as rice grains falls on the upper surface of the heat radiating plate and is carbonized, it can be easily cleaned and removed to prevent the heat radiating plate from falling downward, thereby reducing the reflection efficiency of the heat radiating plate. There is an effect that good rice cooking performance can be always maintained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an electric rice cooker according to one embodiment of the present invention, FIG. 2 is an enlarged sectional view of a part of a heat radiating plate in the electric rice cooker, and FIG. It is. 1... Rice cooker body, 3... Pot storage section, 4.
Heat dissipating plate, 7: Seed heater (heating means), 10, 11: Rising part.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A47J 27/00-27/64

Claims (1)

(57) [Claims] 1. A rice cooker main body having a pot accommodating portion, a pan accommodated in the pan accommodating portion, a plate-shaped heat radiation plate provided below an outer bottom surface of the pan, and a center of the heat radiation plate. An opening for inserting a heat-sensitive cylinder provided with a temperature sensor for detecting the temperature of the pan formed in the portion, and a heating means provided on the lower side of the heat radiating plate,
An electric rice cooker, wherein rising portions protruding upward are provided on an outer peripheral edge and an inner peripheral edge of the heat radiating plate, respectively.