JP3153121B2 - Electric rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an electric rice cooker using a lamp heater such as a halogen heater as a heat source.

[0002]

2. Description of the Related Art As shown in FIG.
A halogen heater 33 is provided below the inner pot 32 provided inside the rice cooker main body 31, and the halogen heater 33 and the inner pot 3 are provided.
When the inner pot 32 is removed between the two, the halogen heater 33
Is provided with a protective plate 34 made of crystallized heat-resistant glass for protecting the glass.

[0003]

However, in this conventional electric rice cooker, since the protection plate 34 is formed of crystallized heat-resistant glass, radiation from a heat source is reflected or absorbed by the protection plate. Therefore, the thermal efficiency decreases by about 10%,
Further, there is a disadvantage that the rapid heat property or the quick cooling property is impaired.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in focusing on shortcomings of the conventional electric rice cookers described above, installing a bobbin case which is provided inside the 炊 rice body, the bottom of the inner pot Heating with a lamp heater such as a halogen lamp and reflecting the electromagnetic wave output from the lamp heater by a reflector plate disposed below the lamp heater to promote heating of the inner kettle. subjected to a blackening treatment on the outer circumferential bottom surface, and the upper portion of the reflector body so as to transmit to the inner holder the heat of the reflector body is brought into close contact with the outer peripheral surface of the inner pot, further
The outer peripheral edge of the inner pot and the upper edge of the reflector plate
Bend to be the attachment part and the upper end of the rice cooker body
A mounting portion is provided on the inner wall, and the inner pot is mounted on the mounting portion of the rice cooker body.
Is fixed via the mounting portion of the reflector plate.
It is characterized by being attached .

According to this structure, the radiation from the lamp heater to the inner pot reaches the inner pot without being disturbed on the way.
The radiation directed to the reflector is reflected by the reflector and travels to the inner pot, while the heat absorbed by the reflector itself is transmitted to the inner pot by heat transfer to promote heating of the inner pot. . As a result, all the radiation directed to the inner pot of the lamp heater is efficiently used for heating the inner pot, and the radiation directed to the reflector plate is reflected by the reflector plate to contribute to the heating of the inner pot and to reflect the reflected light. The heat absorbed into the inner kettle is transmitted to the inner kettle via the reflector plate, and the heating of the inner kettle can be further promoted.

[0006]

[0007] According to this structure, absorbed heat of the reflector body is transmitted more efficiently bobbin case through the mounting portion and the mounting portion. Further, even if the broth or the like attached to the lid falls on the edge of the inner pot, it is blocked by the attached portion and the attaching portion, and does not fall between the inner pot and the rice cooker main body. As a result, the heat of the reflector plate is efficiently transmitted to the inner pot, and the heat of the lamp heater can be efficiently used for heating the inner pot. Moreover, it is possible to prevent the broth attached to the lid or the like from dropping between the inner pot and the rice cooker main body, and to provide a sanitary electric rice cooker.

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. [First Embodiment] FIG. 1 is a sectional view of a main part of an electric rice cooker according to a first embodiment of the present invention, wherein 1 is a rice cooker main body, and 2 is a rice cooker main body 1. The lid is a lid that opens and closes the upper surface. An inner lid 3 is attached to the inner surface of the lid 2 with screws 4. Reference numeral 5 denotes a sealing material sandwiched between the lid 2 and the inner lid 3, and is formed of a material having heat resistance and elasticity.

Reference numeral 6 denotes an inner pot which is mounted in the rice cooker main body 1 by being placed on a table 7 fixedly provided on the bottom of the rice cooker main body 1 with its bottom surface. An attached portion 9 formed by bending outward in an inverted L-shape is screwed with a screw 10 to an attachment portion 8 provided to protrude from the inner wall of the rice cooker main body 1. The inner pot 6 is made of aluminum, and its outer surface (heat source side) is subjected to blackening treatment (coating) using a selective absorption film or heat-resistant paint which is anodized with black nickel, thereby absorbing electromagnetic waves. Is increasing. The inner surface of the inner pot 6 is subjected to Teflon processing so that cooked rice does not adhere.

Numeral 11 denotes a lamp heater provided as a heat source, which comprises a racket-shaped halogen heater or the like as shown in FIG. 2, and is arranged below the inner pot 6 so as to surround the table 7. This lamp heater can immediately emit electromagnetic waves of about 0.5 to 5 μm when energized. Quartz is used as the material of the heater tube because of its good electromagnetic wave transmittance and workability. ing.

Reference numeral 12 denotes a reflector plate formed in a container shape having an inner diameter substantially equal to the outer diameter of the inner kettle and having a depth greater than that of the inner kettle. Has a bright alumite treatment to increase the reflectance. Then, the reflector plate 12 is positioned below the inner pot 6 and the lamp heater 11 so that the rice cooker main body 1 is disposed.
The mounting portion 13 provided at the upper end periphery of the inner pot 6 is tightly fitted between the mounting portion 8 and the mounting portion 9 via a spacer 14 made of a heat insulating material. The inner pot 6 is received in close contact with the inner pot. The reflecting plate 12 penetrates the table 7 with a through hole 15 provided in the center of the bottom.

In the above configuration, a part of the electromagnetic wave radiated from the lamp heater 11 reaches the inner pot 6 directly and is efficiently absorbed without being disturbed by the protection plate as in the conventional case. In addition, about 95% of the electromagnetic wave traveling toward the reflector 12 is reflected by the reflector and travels toward the inner pot 6. On the other hand, about 5% of the electromagnetic wave is absorbed by the reflector plate 12 and raises the temperature of the reflector plate. However, the heat of the reflector plate causes the inner pot 6 and the reflector plate 12 to come into close contact with each other as described above. Is transmitted to the inner pot 6 to be used for heating the inner pot 6. If the temperature of the reflector increases, the heat loss due to the radiation of the lamp heater increases, so that the temperature of the reflector needs to be lowered. However, the heat of the reflector is transferred to the inner pot 6 as described above. Since it is kept low, the amount of heat loss is reduced and the thermal efficiency is improved.

[Second Embodiment] In the present invention, the first embodiment is used.
In the electric rice cooker shown in the embodiment, a cleaning mode is provided in consideration of the cleaning property of the inner pot 6 so as to facilitate the peeling of cooked rice. That is, when the remaining amount of cooked rice is low, if the inner pot 6 is heated, the phenomenon that the cooked rice peels from the inner pot 6 is used.

FIG. 3 shows a control circuit provided to execute this cleaning mode. In the figure, reference numeral 16 denotes a microcomputer (CPU) as a central control circuit, and 17 detects the temperature of the bottom surface of the inner pot 6. Temperature sensor, 18 is a cleaning switch for setting a cleaning mode, 19 is a power switch, 20 is various detecting means other than the temperature sensor, 21
Is an alarm comprising a liquid crystal, an LED, a buzzer, etc., 22 is an alarm drive circuit for driving this alarm 21, 23 is a control circuit for the lamp heater 11, and 25 is another controlled device 24 such as a warming heater. It is a driving circuit for driving. 2
Reference numeral 6 denotes a drive power supply for the CPU.

The operation of the above circuit will be described with reference to the flowchart of FIG. Cleaning switch 1
8 is turned on (step # 5), the lamp heater 11 is turned on (step # 10) and the inner pot 6 is heated. As a result, when the temperature of the inner pot 6 rises and the temperature sensor 17 detects 80 ° C. (Step # 15), the lamp heater control circuit 23 turns off the power supply to the lamp heater 11 (Step # 20). When the power supply to the lamp heater 11 is turned off, the time is counted by a timer circuit (not shown) in the CPU 16 (step # 25), and until the timer circuit counts a predetermined time, the temperature sensor is operated. 1
7, the temperature of the inner pot 6 is detected.
N and OFF are repeated (Steps # 30, # 35, # 4
0, and # 45).

When the timer circuit reaches a predetermined time, the process proceeds to step # 50, where the lamp heater 11 is turned off and the annunciator 21 is turned on (step # 55). Next, at step # 60, the power switch 1
It is determined whether or not 9 has been turned on. If it is determined that it has not been turned on, the temperature of the
It is detected whether or not the temperature is 0 ° C. or higher (step # 65). When it is determined that the temperature is equal to or higher than 60 ° C. in step # 65, the power supply to the lamp heater 11 is turned off in step # 75. As a result, the temperature of the inner pot 6 is maintained at 60 ° C. In such a cycle in which the inner pot 6 is maintained at 60 ° C., when the power switch 19 is turned off, the lamp heater 11 is turned off, and the cleaning mode ends (step # 80).

In the above, once the temperature of the inner pot 6 is 80 ° C.
The reason for this is that the remaining cooked rice is heated so as to be quickly separated from the inner pot 6 that has been processed with Teflon, and then the remaining rice is heated.
The maintenance at 0 ° C. is for maintaining the temperature at which there is no fear of fire or the like even if the user forgets to turn off the power switch.

[0024]

As described above, the electric rice cooker of the present invention
An inner pot installed in the rice cooker body is heated by a lamp heater such as a halogen lamp installed at a lower part of the inner pot, and an electromagnetic wave output from the lamp heater is reflected by a reflecting plate disposed at a lower part of the lamp heater. In the one that promotes heating of the inner kettle by reflecting, a blackening process is performed on the outer peripheral bottom surface of the inner kettle, and the upper portion of the reflector plate is brought into close contact with the outer peripheral surface of the inner kettle to form a reflector plate. so as to transmit to the inner pot heat, further
The outer peripheral edge of the inner pot and the upper edge of the reflector plate
Bend to be the attachment part and the upper end of the rice cooker body
A mounting portion is provided on the inner wall, and the inner pot is mounted on the mounting portion of the rice cooker body.
Is fixed via the mounting portion of the reflector plate.
It is a configuration attached .

Therefore, according to this configuration, all the radiation directed to the inner pot of the lamp heater is efficiently used for heating the inner pot, and the radiation directed to the reflecting plate is reflected by the reflecting plate and is reflected by the inner pot. And the heat absorbed by the reflector plate is transferred to the inner pot via the reflector plate to further promote the heating of the inner pot.

[0026]

Further, according to this configuration, it absorbed heat of the reflector body is transmitted more efficiently bobbin case through the mounting portion and the mounting portion. Further, even if the broth or the like attached to the lid falls on the edge of the inner pot, it is blocked by the attached portion and the attaching portion, and does not fall between the inner pot and the rice cooker main body. As a result, the heat of the reflector plate is efficiently transmitted to the inner pot, and the heat of the lamp heater can be efficiently used for heating the inner pot. Moreover, it is possible to prevent the broth attached to the lid or the like from dropping between the inner pot and the rice cooker main body, and to provide a sanitary electric rice cooker.

[0028]

[0029]

[0030]

[0031]

[0032]

[0033]

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a configuration of an electric rice cooker according to the present invention.

FIG. 2 is a perspective view of a lamp heater provided in the electric rice cooker according to the present invention.

FIG. 3 is a block circuit diagram showing a control circuit for executing a cleaning mode in the electric rice cooker according to the present invention.

FIG. 4 is a flowchart illustrating an operation of the electric rice cooker according to the present invention in a cleaning mode.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rice cooker main body 2 Lid 6 Inner pot 8 Attachment part 9 Attachment part 11 Lamp heater 12 Reflector body 13 Attachment part 16 Microcomputer 18 Cleaning switch 19 Power switch 21 Alarm

Claims (1)

(57) [Claims] 1. An inner pot provided in a rice cooker main body is heated by a lamp heater such as a halogen lamp provided at a lower portion of the inner pot and a lamp heater is provided by a reflecting plate disposed at a lower portion of the lamp heater. In the one that reflects the electromagnetic wave outputted from the inner kettle and promotes heating of the inner kettle, a blackening process is performed on the outer peripheral bottom surface of the inner kettle, and the upper part of the reflecting plate body is brought into close contact with the outer peripheral surface of the inner kettle. so as to transmit to the inner holder the heat of the reflector body Te, further, the upper peripheral portion of the inner pot and the reflector body
It is bent outside each diameter to make a part to be attached, and
A mounting portion is provided on the inner wall of the upper end of the rice cooker main body, and the rice cooker main body is removed.
Attach the attached part of the inner hook to the attached part of the reflector plate.
An electric rice cooker characterized by being fixedly mounted via a pad.