JP3473487B2 - rice cooker - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker used for ordinary households or business use. [0002] In a conventional rice cooker, when the rice is cooked and the temperature is kept warm, the power supply to the heating means is stopped, and the rice is lowered to a predetermined temperature and kept warm. If the heating means is stopped, excess water will evaporate and condensate on the radiator plate unit with packing and the side of the pan, and the condensed water will drip and stick, causing problems such as sticky rice. The power supply to the heating means has been performed. [0003] However, in the above-mentioned rice cooker, since the excess water is prevented from sticking to the pot or the heat sink by heating the heating means, the rice is heated more than necessary. Deterioration and discoloration of the rice become remarkable, and the method of heating cannot forcibly discharge excess water in the pot to the outside. There was a problem that water easily adhered. The present invention solves the above-mentioned problems, and controls the driving state of a blower according to the opening / closing state of a lid, thereby providing a safe and unnecessary power consumption in a configuration. It is to reduce moisture and to reduce stickiness of rice, and to quickly lower the temperature to an appropriate heat retention temperature to suppress deterioration of rice. [0005] In order to solve the above-mentioned problems, the present invention provides a heating means for heating a pot stored in a main body, and a shaft which covers an opening on the upper surface of the main body and can be opened and closed freely. A supporting lid, a radiating plate unit with a packing that is detachably mounted on the lower surface of the lid and placed on the upper surface of the pan, and an air outlet provided in the lid, and the air communicating with the air outlet; a blowing passage provided in the lid body, a blower for blowing air to the inner bowl through the air passage, a lid closing detection means to the lid body
The air flow rate varies according to the lid opening time and the number of lid openings during the heat insulation.
It is made to be. According to the first aspect of the present invention, it is possible to control according to the amount of water vapor in a pot, thereby suppressing stickiness of rice and suppressing deterioration of rice. It is. In addition, the optimal feeding according to the length of the lid opening time
Airflow can be provided to reduce sticky and dry rice
At the same time, deterioration of rice can be reduced. An embodiment of the present invention will be described with reference to FIGS. In FIG. 1 to FIG. 3, the main body 1 has an opening on the upper surface, and a protective frame 3 which is a storage portion for the pan 2 is provided inside the main body 1. Outside the protective frame 3, a heating means is provided. An induction coil 4 is provided. A cover 5 covers an upper opening of the main body 1. The lid 5 is rotatable via a pin 8 to a hinge member 7 integrally formed on an upper portion of an upper frame 6 constituting an upper portion of the main body 1. It is supported by. Reference numeral 9 denotes an outer lid cover, and the outer lid cover 9 is fixed inside the lid 5. A heat radiating plate 10 as a heating element and a heat radiating plate unit 12 having a pot packing 11 are detachably attached to the outer lid cover 9, and the upper part of the radiating plate 10 is supported by the outer lid cover 9. The lid induction coil 13 as the lid heating means is located. The heat radiation plate 10 generates heat by the electromagnetic action of the lid induction coil 13. When the lid 5 is closed, the pan packing 11 is pressed against the flange 14 of the pan 2 to hermetically close the pan 2. Reference numeral 15 denotes a steam cylinder detachably provided on the lid 5. A magnetic float 16 is provided below the steam cylinder 15 so that the float 16 can be moved during rice cooking. The lead SW 17 is arranged at a position facing the float 16 in the body 5. When the rice reaches the float 16, the float 16 moves, and the change in the magnetic field is detected by the reed SW 17, and the output to the induction coil 4 serving as a heating means is controlled to prevent the rice from flowing out. ing. The float 16 is also configured to move when the cover 5 is opened and closed, and the opening and closing operation of the cover 5 can be detected by the reed SW 17 as a change in the magnetic field. A steam valve 19 is provided in the steam cylinder 15 so as to close an internal steam port 18.
A core plate 21 provided with a first magnet 20 is provided on the outer peripheral flange portion so as to be vertically movable, and the steam valve 19 is raised when the core plate 21 is raised. On the other hand, a steam valve drive unit 22 is provided inside the lid 5,
The steam valve drive unit 22 has a rotatable rotor 24 in which a second magnet 23 oriented so as to have a different polarity from the first magnet 20 is disposed at a position facing the first magnet 20.
And a steam valve drive motor 25 for rotating the rotor 24. By controlling the steam valve drive motor 25, the rotor 24 is rotated and the second magnet 2 is rotated.
When the third magnet and the first magnet 20 face each other, the core plate 21 rises due to the repulsive force of the second magnet 23 and the first magnet 20, and the steam valve 19 is pulled up to open the steam port 18. Further, a heat sink 10 on the lower surface of the outer lid cover 9
On the side, a fan unit 27 of a blower 26 is rotatably supported between a fan case 28 and an outer cover 9. By providing the fan unit 27 on the lower surface of the outer cover 9, the fan unit 27 cannot be seen when the lid 5 is closed during use, and the lid 5 is not used.
Opening allows the fan unit 27 to be cleaned. The motor unit 29 of the blower 26 is provided inside the lid 5 of the outer lid cover 9. The motor unit 29 is provided with a motor magnet 30, and the fan unit 27 is provided with a fan magnet 31. Magnet 30 and fan magnet 31
The fan part 27 can be rotated by the attraction force. In the radiator plate unit 12, an intake valve 32 is formed by a spring 33 and an air outlet 34 of the radiator plate unit is connected to the intake valve packing 3.
5 urges in the closing direction. A valve lever 36 is attached to the outer lid cover 9 above the intake valve 32 so as to seal the inside of the lid 5 with a lever packing 37. The opening and closing of the intake valve 32 is performed by pushing down a valve lever 36 with a cam 39 from a motor unit 29 of the blower 26 via a gear unit 38. A gap 43 is provided between the main body 1 and the lid 5 to secure the gap 43 even if the lid 5 or the main body 1 is deformed or warped. A rib is provided in a portion facing 5. The heat sink unit 12
A gap is provided between the outer cover 9 and the outer cover 9 constituting the lower portion of the lid 5 to form the air passage 44. Outside air is sucked into the blower 26 from the gap 43 between the lid 5 and the main body 1 through the blower passage 44, and the wind sent from the blower 26 is sent into the pan 2 from the blower port 34 of the radiator plate unit 12. . Thereby, the steam port 1 is formed on the outer surface of the lid 5.
Outside air can be sent into the pot 2 without making holes other than 8. The connection between the steam cylinder 15 and the heat radiating plate 10 is sealed by a steam plate packing 40 so that the exhaust gas in the pan 2 does not leak between the heat radiating plate unit 12 and the outer cover. The radiator plate 10 is provided with a connecting hole 41 that connects to the steam cylinder 15, and forms a steam passage 45. Further, between the heat radiating plate 10 and the fan case 28, an air outlet gasket 42 is provided.
The blast from 6 does not leak. By arranging the blower port 34 and the blower 26 inside the cover induction coil 13, the space inside the cover 5 can be effectively used, and the heat insulation performance can be improved with a compact size. When the rice cooker of the rice cooker constructed as described above finishes cooking rice, the blower 26 is operated for a certain period of time to send outside air into the pot 2. When outside air is sent into the pot 2, excess air in the pot 2 is discharged to the outside from the exhaust hole 41 of the radiator plate 10 through the steam tube 15 so that excess steam in the pot 2 is removed. It can be discharged to the outside, preventing dew condensation on the side surface of the pot 2 and the radiator plate unit 12 and preventing sticky rice. In other words, when rice is put in a wooden diaper, excess moisture has the same effect as that of the rice being sucked by the tree to become non-sticky rice. Further, by discharging the air in the pot 2 and introducing the outside air, the odor of the rice generated due to the deterioration due to the heat retention can be discharged to the outside, so that the rice for the heat retention can be improved in terms of odor. Can be done. Further, the outside air lower than the temperature in the pan 2 flows into the pan 2, so that the temperature of the rice in the pan 2 can be quickly lowered to a predetermined temperature. The longer the holding time at high temperature, the greater the deterioration and discoloration due to oxidation and the like, and thus the deterioration and discoloration can be reduced by quickly lowering the temperature to a predetermined temperature. When the lid is opened after cooking rice, the float 16 moves, and when the lid is opened by the SW 17, the drive of the blower 26 is stopped to ensure the safety at the time of maintenance. In addition, unnecessary power consumption can be suppressed. The lid SW 17 detects the lid opening time or the number of times the lid is opened during heat insulation, and controls the driving time of the blower 26 according to the length of the lid opening time, thereby controlling the amount of outside air sent into the pan 2. It is possible to prevent the water in the pot 2 from being excessively spattered or dewed, to prevent stickiness and drying of the heated rice, and to improve the heat retaining state of the rice. In the description of the present embodiment, the direction of blowing the air from the blower 26 into the pan 2 is reversed. However, the blowing direction of the blower 26 is reversed, and the wet air in the pan 2 is passed through the blower 26. The effect is the same even in the direction of discharging from the gap 43 between the lid 5 and the main body 1. In this case, the intake is performed from the steam port 18. Further, in this embodiment, a method using induction heating is shown as the heating means, but the same applies when a sheath heater, a halogen heater, or the like is used. In addition, the intake valve is provided on the radiator plate, and the intake valve is opened and closed by the output of the blower, but the position of the intake valve may be either the intake side or the blow side of the blower, and the drive of the intake valve is also for driving. A motor or a solenoid may be used. Further, the lead SW inside the lid is used for detecting the lid opening / closing.
Although a combination of the magnet and the magnet in the steam cylinder is used, a similar detecting means may be provided between the main body and the lid. As described above, according to the first aspect of the present invention, control according to the amount of water vapor in the pot becomes possible, thereby suppressing stickiness of rice and reducing deterioration of rice. Can be. Also, according to the length of the lid opening time during the heat retention
It can provide the optimal air volume, making the rice sticky and dry
And reduce the deterioration of rice
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front and rear cross-sectional view of a rice cooker according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of a main part of the rice cooker. [Description of Signs] 1 Main body 2 Pan 4 Heating means 5 Lid 12 Heat sink unit with packing 13 Lid induction coil 16 Magnet 17 Reed switch 18 Steam port 26 Blower 34 Blow port 44 Blow path

Continuation of front page (72) Inventor Koichiro Yamashita 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-307010 (JP, A) JP-A-4-193119 (JP) JP-A-9-299236 (JP, A) JP-A-5-192244 (JP, A) JP-A-5-154039 (JP, A) JP-A-6-194023 (JP, A) 63-135108 (JP, A) JUN 8-4898 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/00 103 A47J 36/38

Claims (1)

(57) [Claims 1] A heating means for heating a pot stored in the main body, a lid which covers an upper opening of the main body and is pivotally supported so as to be openable and closable, A heat sink unit with a packing detachably mounted on the lower surface and placed on the upper surface of the pan, a blower port provided in the lid, and a blower passage provided in the lid body in communication with the blower port; A blower that blows air into the pot through the blower passage and a cover opening / closing detecting means are provided in the cover body, and the amount of blown air varies according to the cover opening time and the number of times the cover is opened during heat retention.
Rice cooker made by reduction.