JPH064856Y2 - Electric rice cooker - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to an electric rice cooker for heating rice in a pan with a heater unit to cook rice.

(Prior Art) As an electric rice cooker of this type, a heater unit is installed horizontally on the inner bottom of the pot housing of the rice cooker body, and the bottom of the pot housed in the pot housing is heated by the radiant heat of this heater unit. It is known to cook rice by cooking.

In such an electric rice cooker, the pan is directly heated by the radiant heat radiated from the upper surface of the heater unit, and the radiant heat radiated downward from the lower surface of the heater unit is reflected at the inner bottom surface of the pan housing portion. It reflects and hits the peripheral surface portion of the pan through the gap on the outer peripheral side of the heater unit, whereby the pan is heated as a whole to cook rice with less cooking.

(Problems to be solved by the invention) However, during preparation of rice, foreign matter such as water or rice grains falls into the pot housing section and penetrates into the lower part of the heater unit through the gap on the outer peripheral side of the pot unit, May adhere to the reflective surface of the bottom surface, and in such a case, the foreign matter is carbonized by the radiant heat of the heater unit to form a black carbonized layer.As a result, the reflective efficiency of the radiant heat on the reflective surface is reduced and the rice cooking performance is improved. There is a drawback that it gets worse.

This invention was made with this point in mind, and its purpose is to prevent foreign matter from adhering to the reflecting surface of the inner bottom surface of the pot housing and to efficiently reflect the radiant heat of the heater unit. It is to provide an electric rice cooker that can be operated.

[Means for Solving the Problems] (Means for Solving the Problems) In order to achieve such an object, the present invention separates and opposes the bottom surface of the pan from the inner bottom part of the pan housing part for inserting and removing the pan. The heater unit is arranged horizontally, and the radiant heat is radiated from the upper surface of the heater unit to the bottom surface of the pot, and the radiant heat radiated from the lower surface of the heater unit faces the inner bottom surface of the pot housing section and the heater unit. In the case where rice is cooked by being reflected on a part of the reflecting surface part and radiating this radiant heat from the gap between the outer peripheral edge of the heater unit and the inner peripheral surface of the pan accommodating portion to cook the rice, the boundary of the area of the reflecting surface part The standing wall is integrally provided in the part.

(Function) If foreign matter such as water or rice drops falls into the pot housing during preparation of rice and enters the inner bottom of the pot housing, it stands up at the boundary of the reflective surface area facing the heater unit. Since the wall is protruding, the foreign matter is not blocked by this standing wall and does not reach the top of the reflecting surface section. Therefore, the surface of the reflecting surface section is always kept clean without being contaminated, and the radiant heat of the heater unit is always efficient. Can reflect well.

(Embodiment) An embodiment of the present invention will be described below with reference to FIG.

In the figure, reference numeral 1 denotes a rice cooker main body, and a bottomed cylindrical inner frame 2 constituting a pot accommodating portion is provided inside the rice cooker main body 1, and the inner frame 2 is made of aluminum or the like and contains far infrared rays. Infrared rays can be effectively reflected inside.

In the inner frame 2, a rice cooking pot 4 made of a metal such as aluminum having excellent thermal conductivity is detachably housed. A heater unit 5 for heating the pan 4 is horizontally provided on the inner bottom portion of the inner frame 2 so as to face the bottom surface of the pan 4 so as to be spaced apart therefrom. The heater unit 5 includes a heat radiating plate 6 formed of a stainless steel metal having excellent high temperature corrosion resistance, and a sheathed heater 7 integrally attached to the lower surface of the heat radiating plate 6 by brazing or the like. The heat radiating plate 6 is disk-shaped and has an opening 8 in the center thereof, and ceramics such as alumina or zirconia is sprayed on the upper surface of the heat radiating plate 6 for improving the radiation effect and improving the appearance. . Further, the sheathed heater 7 is bent in a spiral shape and is attached to the lower surface of the heat dissipation plate 6 so as to be arranged substantially uniformly.

A guide cylinder 13 is integrally formed at the center of the inner bottom of the inner frame 2, and the guide cylinder 13 is exposed to the upper side of the heater unit 5 through the opening 8 and the heat sensitive cylinder 14 is vertically arranged in the guide cylinder 13. It is housed movably, and a temperature sensor 15 is attached to the inside of the upper end surface of the heat-sensitive cylinder 14. The heat-sensitive cylinder 14 is elastically urged upward by a spring 16, and the urging force causes the heat-sensitive cylinder 14 to project from the upper end surface of the guide cylinder 13 and come into contact with the central portion of the bottom surface of the pan 4, whereby the temperature sensor 15 is contacted. Detects the temperature of the pan 4, and the energization of the sheath heater 7 is controlled based on this detection.

A portion of the inner bottom surface of the inner frame 2 facing the heater unit 5 is a reflection surface portion 18 that reflects the radiant heat of the heater unit 5, and the reflection surface portion 18 projects upward in a stepped shape, and the reflection surface portion is formed by this protruding structure. Standing walls 19 and 19 are formed at the boundary between the 18 regions. Discharge holes 20 ... Are formed in the bottom surface of the inner frame 2 adjacent to these standing walls 19, 19. Reference numeral 21 is a lid that opens and closes the opening at the upper end of the pot 4.

Then, when cooking rice, the pan 4 is taken out from the inner frame 2 and a predetermined amount of rice and water is stored in the pan 4. Then, the pot 4 is inserted into the inner frame 2, the opening of the upper end thereof is closed by the lid 21, 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 heater unit 5, and the radiant heat heats the bottom surface of the pan 4 substantially uniformly. Further, radiant heat is also radiated from the heater unit 5 to the lower side thereof, and the radiant heat is reflected by the reflecting surface portion 18 and is emitted from the gap a between the outer peripheral edge of the heater unit 5 and the inner peripheral surface of the inner frame 2 to form a pan. It hits the peripheral surface of the pan 4, which heats the pan 4 as a whole. Then, such heating is continued, and the rice cooking is completed when the required time elapses.

By the way, when foreign matters such as water and rice grains fall into the inner frame 2 during preparation of rice and the like and enter the inner bottom portion of the inner frame 2 through the gap a and the opening 8, the foreign matter faces the heater unit 5. Since the reflecting surface portion 18 projects in a stepped shape, the foreign matter is not blocked by the upstanding walls 19 of the reflecting surface portion 18 and reaches the reflecting surface portion 18,
Therefore, the surface of the reflecting surface portion 18 is kept clean without being contaminated. Therefore, the radiant heat of the heater unit 5 is always efficiently reflected by the reflecting surface portion 18 and effectively hits the pan 4, and thus good rice cooking performance can be maintained for a long period of time. Water in the foreign matter that has entered the inner bottom portion of the inner frame 2 is discharged to the outside through the discharge holes 20.

By the way, a configuration is conceivable in which a reflecting plate separate from the inner frame 2 is provided above the inner bottom surface of the inner frame 2 so as to face the lower surface of the heater unit 5, and radiant heat is reflected by such a reflecting plate. In such a configuration, since a reflecting plate separate from the inner frame 2 is required, the structure becomes complicated, the assembly is troublesome, and the cost becomes high. On the other hand, in this invention, since the standing wall 19 which integrally projects from the inner bottom surface of the inner frame 2 prevents foreign matter from adhering to the reflecting surface portion 18, a separate member is not required and assembly is easy. There is also an advantage that the cost will be cheaper.

In the embodiment, the standing wall 19 is formed by projecting the entire reflecting surface portion 18 in a stepped shape.
As shown in FIG. 2, projections 19a, 19a having a U-shaped cross section are integrally projected from the inner bottom surface of the inner frame 2 at the boundary between the regions of the reflection surface portion 18, and the rising wall 1 is formed by these projections 19a, 19a.
9 and 19 may be configured.

[Effects of the Invention] As described above, according to the present invention, even if a foreign matter enters the inner bottom portion of the pan containing portion, the foreign matter does not reach the reflection surface portion that reflects the radiant heat of the heater unit.
Therefore, there is an effect that the reflecting surface portion is always kept clean to prevent a decrease in reflection efficiency, and good rice cooking performance can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a sectional view showing an electric rice cooker according to an embodiment of the present invention, and FIG. 2 is a sectional view showing an electric rice cooker according to another embodiment of the present invention. 1 ... Rice cooker body, 2 ... Inner frame (pot holder), 4 ...
Pan, 5 ... Heater unit, 18 ... Reflecting surface, 19 ...
... standing wall.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A heater unit is provided at an inner bottom portion of a pan containing portion for inserting and removing the pan so that the pan is opposed to the bottom surface of the pan and is horizontally arranged. Radiant heat is radiated from the upper surface of the heater unit to the bottom surface of the pan. The radiant heat radiated and radiated from the lower surface of the heater unit is reflected on the inner bottom surface of the pot housing section and the reflecting surface portion of the portion facing the heater unit, and the radiant heat is radiated to the outer peripheral edge of the heater unit and the pot housing section. An electric rice cooker characterized in that an erecting wall is integrally provided at a boundary portion of a region of the reflection surface portion in a case where rice is cooked by being emitted from a gap between the peripheral surface and a pot.