JPH10248715A - Electric rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce boiling over while cooking rice, to lower the temperature of a rice cooker main body outer shell, to reduce the degradation of the rice after cooking as much as possible and to maintain the excellent taste of the rice at the time of heat insulation. SOLUTION: A blower 26 capable of sending air to a lid passage 25 inside a lid body 2 is provided in a ventilation path 24 inside a rice cooker main body 1 and the blower 26 directly sucks outdoor air from the intake port 27 of the ventilation path 24. The outdoor air is sent into the lid body 2 through a discharge port 28 and a lid body intake port 29, passed through the lid passage 25 and discharged from a lid body discharge port 30 to the outside as shown by an arrow (b). Thus, since the air sucked by the blower 26 is sent without being passed through a temperature detection part 10, the temperature detection accuracy of an inner pot 7 is not damaged. Also, by sending the air into the lid body 2 while cooking the rice, the temperature rise of the outer lid 15 of the lid body 2 is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric rice cooker such as a jar rice cooker used for general household or business use, and particularly for preventing spillage during cooking and deterioration of rice after cooking. The present invention relates to an electric rice cooker provided with a blower.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a conventional electric rice cooker. The electric rice cooker shown in this figure has a rice cooker main body 1 and a lid 2.
And a basic structure consisting of The rice cooker main body 1 has an outer part formed by an outer shell 3 constituting a peripheral wall portion and a bottom lid 4 coupled to a lower surface of the outer shell 3.
An outer pot 5 is provided inside. A heating plate 6 formed in a shape of a casting container having an open bottom is provided in the outer pot 4, and an inner pot 7 is detachably mounted in the outer pot 5 in a state of being in close contact with the heating plate 6. It has become.

Further, the rice cooker body 1 is provided with a rice cooker 8 embedded in a heating plate 6 and a horizontal heater 9 provided on the outer peripheral surface of the outer pot 5 as a heat source for heating. In addition, a temperature detector 10 for detecting the temperature of the inner pot is provided. The temperature detector 10 includes a heat-sensitive plate 11, a temperature sensor 12
And a thermal fuse 13. Reference numeral 14 denotes a power cord reel for winding and storing the power cord, which is provided on the bottom of the rice cooker main body 1.

[0004] On the other hand, the lid 2 is provided with an outer lid cover 16 for closing the upper opening of the rice cooker main body 1 on the back side of the outer lid 15 constituting the appearance part, and further on the lower side of the outer lid cover 16. An inner lid 17 for closing the upper opening of the inner pan 7 is attached, and a steam packing 18 for sealing the upper opening of the inner pan is mounted around the inner lid 17. Further, a lid heater 19 for keeping heat is provided on the inner surface side of the inner lid 17, and further, in the lid 2, a steam cap 20 provided on the inner lid 17 is provided on the upper surface of the outer lid 15. A steam discharge passage 22 leading to the steam outlet 21 is formed. Reference numeral 23 denotes a control board provided in the rice cooker main body 1.

In a conventional electric rice cooker having such a configuration, an inner pot 7 containing water and rice grains is mounted in an outer pot 5,
When the lid 2 is closed, the steam packing 18 is
The rice cooker 8 heats the inner pot 7 via the heating plate 6 to cook rice from this state. The rice cooker 8 executes various sequences such as rice cooking and heat keeping by the control board 23 based on the inner pot temperature data from the temperature sensor 12. At this time, the steam generated in the inner pan 7 is discharged from the steam outlet 21 through the steam cap 20 and the steam discharge passage 22 to the outside as shown by an arrow a.

As described above, in the conventional example, each heat source provided in the rice cooker main body 1 and the lid 2, that is, the rice cooker 8, the horizontal heater 9, and the lid heater 19 are turned on / off by the control board 23.
Only by performing the F control, the heating was controlled from the start of rice cooking to the heat retention.

[0007]

However, in the case of the electric rice cooker of the above-mentioned conventional construction, the surface temperature of the outer shell 3 constituting the peripheral wall of the rice cooker main body 1 becomes high due to the heat diffusion at the time of heating the rice cooker, or the steam is discharged. There is a risk that bubbles generated during cooking rice may accumulate in the passage 22 and overflow from the steam outlet 21 to the outside. In addition, when the cooked rice receives excess heat energy from the inner pot 7 or the inner lid 17 at the time of keeping the temperature, the deterioration of the rice is promoted, or when the rice is stirred after the rice is cooked, There was a problem that hot steam hit the hands and face and made them feel hot.

As a prior art which has attempted to solve such a problem, for example, Japanese Patent Publication No. 5-31408 discloses a device in which a cover is provided with a blower, and the steam blown from a steam discharge port at the time of cooking rice is supplied to the blower. Although a device that discharges air to the outside of the lid by blowing air from the device is disclosed, this prior art example only considers preventing the danger due to steam discharge during cooking, and after cooking rice. However, it was not possible to solve the problem caused by the high heat of each part in the above.

Further, in this prior art example, since the blower is provided on the lid, the structure of the lid becomes complicated, and
By increasing the weight, it is necessary to improve the strength of the lid structure and the hinge spring provided for opening the lid, and to improve the shock resistance of the blower when opening and closing the lid, which is also a problem with manufacturing costs. Dots remain.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and reduces the spillage during cooking, lowers the temperature of the outer shell of the rice cooker, and furthermore, deteriorates the rice after cooking. It is an object of the present invention to provide an electric rice cooker capable of minimizing the temperature and maintaining the taste of rice at the time of warming.

[0011]

According to the present invention, there is provided a rice cooker having an outer pot in which an inner pot is detachably accommodated, and steam generated during rice cooking and warming. A lid having a steam discharge passage for discharging and opening and closing the upper opening of each of the rice cooker main body and the inner pot, and keeping the temperature of a heat source provided inside the rice cooker main body and the lid respectively from the start of rice cooking to the heat retention. An electric rice cooker comprising a rice cooker temperature control system that can be controlled for a period of time, wherein the rice cooker main body has an air intake opening facing the outside and the lid body space in a state where the lid is closed. An air passage communicating with the outside through the air passage is formed, and an air blower capable of blowing air to the space inside the lid is provided in the air passage.

[0012] In the above configuration, since the blower is capable of directly inhaling air from the outside and blowing the exhaust air into the cover, the structure of the cover is smaller than that in which the blower is provided in the cover. Is simplified and the weight is reduced. Moreover, since the blower is provided in the rice cooker main body, the impact on the blower when the cover is opened and closed is reduced, and the durability of the cover is expected to be improved. In addition, since the outside air is directly sucked into the blower, the change in temperature information of the rice cooking temperature control system due to the flow of air is reduced, so that more accurate rice cooking becomes possible. It is also possible to lower the temperature of the lid.

In the above configuration, if the ventilation path is configured to communicate with the steam discharge passage in the cover when the cover is closed, the exhaust air from the blower is blown to the steam discharge passage in the cover. This makes it possible to apply cold air to the bubbles collected in the steam discharge passage and to discharge the bubbles together from the steam discharge port, thereby reducing the volume of the bubbles and making it difficult for the bubbles to overflow from the steam discharge port.

[0014] Further, if the ventilation path is provided through the vicinity of the heat source in the rice cooker main body, and the blower is disposed in a ventilation path portion downstream of the vicinity of the heat source, the air blower can be installed in the rice cooker main body. Exhaust air is blown into the lid body, whereby the temperature rise of the outer shell of the rice cooker main body can be reduced.

[0015] Further, the exhaust port of the ventilation path is formed so as to communicate with the lid when the lid is closed, and to face the vicinity of the opening of the inner pot when the lid is opened. By doing so, it is possible to blow air near the opening of the inner pot by cutting off the route for blowing air into the lid near the opening of the inner pot, and quickly remove excess water from the rice when stirring the rice. By skipping and promoting a drop in rice temperature, deterioration of rice can be reduced. In addition, the high-temperature steam is diffused by the blowing, so that the hot air on the hands and face can be reduced.

Further, if a dust removal filter is provided at one of the intake and exhaust ports of the ventilation path, the exhaust air thus purified can be blown into the lid body, and the rice cooker main body and the lid can be removed. It becomes possible to reduce the dirt on the ventilation path and the ventilation device provided on the body. In addition, in the case where the dust removal filter is provided at the exhaust port of the ventilation path, the intrusion of rice grains and water from the exhaust port can be reduced.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electric rice cooker according to an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show an electric rice cooker according to a first embodiment of the present invention,
FIG. 1 shows an external appearance, and FIG. 2 shows a longitudinal section.

The electric rice cooker according to the present embodiment shown in these figures has a basic structure including a rice cooker main body 1 and a lid 2. The outer appearance of the rice cooker main body 1 is constituted by an outer shell 3 constituting a peripheral wall portion and a bottom lid 4 coupled to a lower surface of the outer shell 3, and an outer pot 5 is provided in the rice cooker main body 1. ing. A heating plate 6 formed in a shape of a casting container having an open bottom is provided in the outer pot 4, and an inner pot 7 is detachably mounted in the outer pot 5 in a state of being in close contact with the heating plate 6. It has become.

Further, the rice cooker main body 1 is provided with a rice cook heater 8 embedded in a heating plate 6 and a horizontal heater 9 provided on the outer peripheral surface of the outer pot 5 as a heat source for heating. In addition, a temperature detector 10 for detecting the temperature of the inner pot is provided. The temperature detector 10 includes a heat-sensitive plate 11, a temperature sensor 12
And a thermal fuse 13. Reference numeral 14 denotes a power cord reel for winding and storing the power cord, which is provided on the bottom of the rice cooker main body 1.

On the other hand, the lid 2 is provided with an outer lid cover 16 for closing the upper opening of the rice cooker main body 1 on the back side of the outer lid 15 which constitutes the outer appearance portion, and further on the lower side of the outer lid cover 16. An inner lid 17 for closing the upper opening of the inner pan 7 is attached, and a steam packing 18 for sealing the upper opening of the inner pan is mounted around the inner lid 17. Further, a lid heater 19 for keeping heat is provided on the inner surface side of the inner lid 17, and further, in the lid 2, a steam cap 20 provided on the inner lid 17 is provided on the upper surface of the outer lid 15. A steam discharge passage 22 leading to the steam outlet 21 is formed.

Reference numeral 23 denotes a control board which constitutes a rice cooking temperature control system, which is provided in the rice cooker main body 1 and which serves as a heat source provided in each of the rice cooker main body 1 and the lid 2. The temperatures of the heater 8, the horizontal heater 9, and the lid heater 19 are controlled during the period from the start of rice cooking to the heat retention.

At the time of use, the inner pot 7 containing water and rice grains is mounted in the outer pot 5 and the lid 2 is closed, so that the steam packing 18 seals the gap between the inner pot 7 and the inner lid 17. From this state, the rice cooking heater 8 heats the inner pot 7 via the heating plate 6 to cook rice. The rice cooker 8 controls the control board 2 based on the inner pot temperature data from the temperature sensor 12.
Each sequence such as rice cooking and heat keeping is executed by 3. At this time, the water vapor generated in the inner pan 7 is, as shown by an arrow a,
The steam is discharged from the steam outlet 21 through the steam cap 20 and the steam discharge passage 22 to the outside.

In the present embodiment, an air passage 24 is formed in the rice cooker main body 1, and an air blowing device 26 capable of blowing air to a lid passage 25 in a lid body is provided in the air passage 24. The ventilation path 24 has an intake port 27 facing the outside at the center of the outer shell 3 and an exhaust port 28 at the upper end. On the other hand, the lid passage 25 has a lid intake port 29 and a lid exhaust port 30 that is not communicated with the steam exhaust port 21. When the lid 2 is closed, the exhaust port 28 of the ventilation path 24 is closed. And the lid intake port 29 of the lid passage 25 communicate with each other in a face-to-face state.

Then, the blower 26 sucks the outside air directly from the intake port 27 of the ventilation path 24, whereby the outside air is fed into the lid through the exhaust port 28 and the lid intake port 29 as shown by the arrow b. Through the lid passage 25 and the lid exhaust port 3
It is discharged from 0 to the outside. As described above, the air sucked by the air blower 26 is blown without passing through the temperature detection unit 10, so that the temperature detection accuracy of the inner pot 7 does not need to be impaired.

Further, by blowing air into the lid 2 during rice cooking, the rise in the temperature of the outer lid 15 of the lid 2 is reduced, and even after the rice is cooked, the temperature of the rice is reduced to near the heat insulation temperature zone. By blowing air to the body 2, the addition of heat energy to the cooked rice is further reduced, whereby the deterioration of the rice is reduced, and the rice can be kept warm for a long time.

FIG. 3 shows a vertical section of an electric rice cooker according to a second embodiment of the present invention. In the present embodiment, portions having the same configuration and operation as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, as shown in FIG. 2, the ventilation path 24 communicates with the steam discharge passage 22 in the lid 2 when the lid 2 is closed.

Therefore, the blower 26 provided in the air passage 24 of the rice cooker main body 1 is provided with the air inlet 27 of the air passage 24.
, The outside air is sucked directly into the lid 2 through the exhaust port 28 and the lid intake port 29 as shown by the arrow c, passes through the lid passage 25, passes through the steam discharge passage 22, and passes through the inner pan. It is mixed with the high-temperature steam generated in 7 and discharged from the steam outlet 21.

As a result, the temperature of the steam discharged from the steam outlet 21 is lowered, and the bubbles generated in the steam discharge passage 22 during the cooking of rice are exposed to the cool air sent through the air blowing path. Foam expansion can be reduced. In addition, the blower 26
Accordingly, it is possible to prevent the backflow of the steam into the lid passage 25 by continuing the blowing.

FIG. 4 shows a vertical section of an electric rice cooker according to a third embodiment of the present invention. In this embodiment, portions having the same configuration and operation as those of the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, as shown in FIG. 4, the opening portion of the air inlet 27 a is set so that the ventilation path 24 passes through the vicinity of the rice cooker 8 as a heat source in the rice cooker main body 1. In addition, the blower 26 is disposed in the air passage portion downstream of the vicinity of the rice cooker 8.

Therefore, the air blower 26 provided in the air passage 24 of the rice cooker main body 1 sucks the outside air from the air inlet 27a, and the sucked outside air flows in the vicinity of the rice cooking heater 8 as shown by an arrow d. After passing through, the air is sent to the lid 2 through the exhaust port 28 and the lid intake port 29, passes through the lid passage 25, and is discharged to the outside from the steam discharge port 21. Thereby, the temperature rise of the outer shell 3 of the rice cooker main body 1, the power cord reel 14, and the like is reduced.

The temperature detection accuracy of the temperature detecting section 10 can be controlled with high accuracy by providing the wall 31 at the portion facing the ventilation path 24. In addition, as another measure for maintaining the temperature detection accuracy of the temperature detection unit 10, the temperature of the control board 23 may be corrected.

FIG. 5 shows a longitudinal section of an electric rice cooker according to a fourth embodiment of the present invention. In the present embodiment, portions having the same configuration and operation as those of the first to third embodiments are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, the exhaust port 28a of the ventilation path 24 communicates with the lid passage 25 via the lid intake port 29a when the lid 2 is closed as shown in FIG. As shown in (B), when the lid 2 is opened, the position is set so as to face the vicinity of the opening of the inner pan 7.

Therefore, as shown in FIG. 5 (A), when the lid is closed, the air blower 26 provided in the ventilation path 24 of the rice cooker main body 1 sucks the outside air directly from the air inlet 27 and is sucked. As shown by the arrow e, the outside air is sent into the lid 2 through the exhaust port 28a and the lid intake port 29a, and the lid passage 25
And is discharged.

When the lid 2 is opened, the state shown in FIG.
As shown in (B), since the path for blowing air into the lid 2 is cut off near the opening of the inner pan 7, the air is continuously blown by the blowing device 26, and as shown by the arrow e ′, the exhaust port 28 is opened.
It is possible to blow air from near a to the vicinity of the upper opening of the inner pan 7. As a result, the steam of the cooked rice is diffused by the blowing, and the amount of hot steam applied to the hands and face can be reduced.

FIG. 6 shows a vertical section of an electric rice cooker according to a fifth embodiment of the present invention. In this embodiment, portions having the same configuration and operation as those of the first to fourth embodiments are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, a suction filter 32 capable of removing dust in the air is provided at an intake port 27 from outside the rice cooker main body 1.

Therefore, the blower 26 provided in the rice cooker main body 1 allows the outside air to flow from the intake port 27 to the intake filter 32.
Is sucked in through the air outlet, and is sucked into the lid 2 through the exhaust port 28 and the lid intake port 29 as shown by the arrow f, passes through the lid passage 25, and is discharged from the steam discharge port 21. . As a result, dust in the air is removed by the suction filter 31.
When the air is blown into the lid 2, the air is blown into the lid 2, so that the dirt on the ventilation path and the ventilation device 26 provided in the rice cooker main body 1 and the lid 2 can be reduced.

FIG. 7 shows a vertical section of an electric rice cooker according to a sixth embodiment of the present invention. In this embodiment, portions having the same configuration and operation as those of the first to fifth embodiments are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, an exhaust filter 33 capable of removing dust in the air is provided at the exhaust port 28 of the ventilation path 24.

Accordingly, the air blower 26 provided in the air passage 24 of the rice cooker main body 1 sucks outside air from the air inlet 27, and the sucked outside air is exhausted from the air outlet 2 as shown by an arrow g.
8. It is fed into the lid 2 through the lid intake port 29, passes through the lid passage 25, and is discharged from the steam discharge port 28. By purifying the air blown into the lid 2 by the exhaust filter 33 provided in the exhaust port 29, dirt on the lid 2 can be reduced, and intrusion of rice grains and the like from the exhaust port 29 can be prevented. Water and water vapor can be reduced.

The suction filter 32 shown in FIG. 6 can be attached to the intake port 27a shown in FIG. 4, and the exhaust filter 33 shown in FIG. 7 can be attached to the exhaust port 28a shown in FIG. Of course, it can be attached. Further, the present invention is not limited to the above-described embodiments, and it goes without saying that many modifications and changes can be made to the above-described embodiments within the scope of the present invention.

[0040]

As described above, according to the first aspect of the present invention, the rice cooker body has an air intake opening facing the outside and passes through the inside space of the lid when the lid is closed. Since a ventilation passage communicating with the outside is formed and a ventilation device capable of blowing air to the space inside the lid is provided in the ventilation passage, the weight of the lid can be reduced, the structure is simplified, and the durability is improved. Can also be improved. Further, since the air sucked by the blower is blown without passing through the temperature measuring section, the accuracy of detecting the temperature of the inner pot does not need to be impaired.

Further, by blowing air to the lid during the cooking of rice, the rise in the temperature of the outer shell of the lid can be reduced, and after the rice is cooked, the air is blown to the lid until the temperature of the rice drops to near the heat retaining temperature zone. By taking away the heat energy after cooking from the lid more quickly, reducing the heat energy added to the cooked rice, the deterioration of the rice can be reduced and the rice can be kept warm for a long time. Become.

According to the second aspect of the present invention, since the ventilation path is configured to communicate with the vapor discharge passage in the lid when the lid is closed, the cool air and the high-temperature steam are formed near the vapor discharge port. Because it is mixed and discharged, the temperature of the exhaust gas drops, and by applying the cool air sent through the blowing path to the foam generated in the steam discharge passage,
Foam expansion can be reduced. In addition, while the high-temperature steam is being discharged, it is possible to prevent the backflow of the steam into the blowing path by continuing to blow the air by the blowing device.

According to the third aspect of the present invention, the ventilation path is provided through the vicinity of the heat source in the rice cooker main body, and the blower is disposed in the ventilation path portion downstream of the vicinity of the heat source. The temperature rise of the outer shell of the main body can be reduced.

According to the fourth aspect, the exhaust port of the ventilation path communicates with the lid when the lid is closed,
When the lid is opened, it is formed so as to face the vicinity of the opening of the inner pot, so that the steam of the cooked rice is diffused by blowing air from the rice cooker main body exhaust port, and is applied to hands and face. The amount of hot steam can be reduced.

According to the fifth aspect, a dust removal filter is provided at one of the intake and exhaust ports of the ventilation path. Therefore, when a filter is provided in the air inlet of the ventilation path, it is possible to reduce the contamination of the blower path and the blower provided in the rice cooker main body and the lid. Also, if a filter is provided at the exhaust port of the ventilation path, by cleaning the air blown to the lid, dirt on the lid can be reduced and rice particles etc. can be prevented from entering through the exhaust port. In addition, it is possible to reduce intrusion of water and water vapor.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing an electric rice cooker according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view thereof.

FIG. 3 is a longitudinal sectional view showing an electric rice cooker according to a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing an electric rice cooker according to a third embodiment of the present invention.

FIG. 5 is an essential part cross-sectional view showing an electric rice cooker according to a fourth embodiment of the present invention, wherein (A) shows the lid closed and (B) shows the lid opened.

FIG. 6 is a longitudinal sectional view showing an electric rice cooker according to a fifth embodiment of the present invention.

FIG. 7 is a longitudinal sectional view showing an electric rice cooker according to a sixth embodiment of the present invention.

FIG. 8 is a longitudinal sectional view showing an example of a conventional electric rice cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rice cooker main body 2 Lid 3 Outer shell 4 Bottom lid 5 Outer pot 6 Heating plate 7 Inner pan 8 Rice cooker 9 Horizontal heater 10 Temperature detector 11 Heat sensitive plate 12 Temperature sensor 13 Temperature fuse 14 Power cord reel 15 Outer lid 16 Outer lid Cover 17 Inner lid 18 Steam packing 19 Cover heater 20 Steam cap 21 Steam outlet 22 Steam outlet passage 23 Control board 24 Ventilation passage 25 Cover passage 26 Blower 27 Intake port 27a Intake port 28 Exhaust port 28a Exhaust port 29 Cover body inlet 29a Lid intake port 30 Lid exhaust port 31 Wall 32 Suction filter 33 Exhaust filter

Claims (5)

[Claims] 1. A rice cooker main body having an outer pot in which an inner pot is detachably accommodated, and a steam discharge passage for discharging steam generated during rice cooking and heat retention to the outside, each of the rice cooker main body and the inner pot. And a rice cooker temperature control system that can control the temperature of a heat source provided in each of the rice cooker body and the lid from the start of rice cooking to the heat retention. In the rice cooker, the rice cooker main body has an air intake opening facing the outside and forms an air passage that communicates with the outside through the lid body space in a state where the lid is closed, An electric rice cooker further comprising an air blower capable of blowing air into the space inside the lid. 2. The electric rice cooker according to claim 1, wherein the air passage communicates with a steam discharge passage in the lid when the lid is closed. 3. The air passage is provided through a vicinity of a heat source in the rice cooker main body, and the blower is disposed at a portion of the air passage downstream of the vicinity of the heat source. An electric rice cooker according to claim 1. 4. An exhaust port of the air passage is formed to communicate with the lid when the lid is closed, and to face the vicinity of the opening of the inner pan when the lid is opened. The electric rice cooker according to claim 1. 5. The electric rice cooker according to claim 1, wherein a dust removing filter is provided at one of the intake and exhaust ports of the ventilation path.