JPH10276900A - Rice cooker lid - Google Patents

Abstract

(57) [Abstract] [Problem] To freely control the pressure in a pot in a rice cooking process,
Provided is a rice cooker that can significantly improve rice cooking and heat retention performance, is hardly spilled over, and can be easily maintained. SOLUTION: An opening / closing device for opening / closing a steam outlet 23c is provided, and the opening / closing device is capable of moving up / down.
The on-off valve unit 22 includes a tubular steam cylinder 16 having a vent on the top surface, a core plate 13 supporting the steam cylinder 16 and having a tubular flange, and a steam outlet 23c.
And a valve holder 17 for holding the valve 18a. The lower end surface of the valve holder 17 is provided with the steam outlet 23c regardless of the vertical movement of the on-off valve unit 22.
Lower than the top surface of the.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for a rice cooker used in a general household or the like.

[0002]

2. Description of the Related Art Conventionally, as a rice cooker of this type, for example, there is one as shown in FIG. That is, in FIG.
51 is a pot, 52 is a lid that hermetically covers the pot 51 via a packing 53, and 54 is a safety valve that normally closes the opening of the steam pipe 55 provided on the lid 52, The steam pipe 55 is configured to be opened. That is, when the internal pressure of the pot 51 becomes slightly higher than the normal operating pressure, the safety valve 54 allows the steam to escape and the pot 51 to release.
Is controlled not to exceed a certain pressure inside. 56
Is a heater for supplying heat from the bottom of the pot 51, and 57 is a lid 5
2 is a handle, 58 is a handle of the pot 51, and 59 is a handle of the device main body 60. Reference numeral 61 denotes a heat-sensing device for detecting the temperature of the bottom surface of the pot 51. Reference numeral 62 denotes a control device provided on the bottom side of the device main body 60. At the same time as the operation, the timer 51 (not shown) built in the time-off type time switch 63 for setting the cooking time when the bottom surface of the pot 51 reaches a predetermined temperature is driven.

However, in such a conventional structure,
As long as the pressure does not exceed the set pressure, the pressure is kept applied by the safety valve 54. When rice is cooked, it can be divided into three steps: water absorption, cooking, and steaming. The surface is broken and sticky, and rice with a foul smell is cooked.

In other words, water is mainly absorbed in the rice cooking process and pressure is applied in the cooking process to promote the water absorption of the rice and increase the boiling point so that the grains have a swelling, thereby improving the fire quality and improving the stickiness. In the steaming process, steam could be released without applying pressure to control the pressure, such as removing excess moisture and stickiness, so that the grain surface collapsed and rice with a sticky and sticky smell was cooked.

[0005] In the heat retention, moisturizing during the heat retention has the effect of suppressing performance deterioration such as drying and yellowing of rice, but the safety valve 54 keeps the inside of the pot and outside air shut off during the heat retention. , The inside of the pot is in a high humidity condition, and the steam is condensed, causing the rice to swell, and the safety valve 54
If the heat was removed and steam was released, steam would be released and the temperature in the pot would drop, leading to deterioration of performance such as rice drying and yellowing.

In order to solve these problems, in the prior art, a rice cooker main body having a heating element, a pot removably stored in the rice cooker main body, and an upper opening of the rice cooker main body can be opened and closed. And a cover having a steam outlet, and an opening / closing device for opening and closing the steam outlet.

[0007] The above-mentioned opening / closing device can control pressurization and depressurization by controlling the opening and closing of the steam outlet at the time of heating of rice cooking, so that the above-mentioned rice cooking process mainly absorbs water, and the steam outlet is closed during the cooking process. By pressurizing and opening the steam outlet in the steaming process and communicating and not applying pressure,
You can cook rice with good swelling and good stickiness with good swelling. Also, when keeping the temperature warm, the steam is blown out and controlled by controlling the opening and closing of the steam outlet to control the humidity in the pot, soaking of the rice in the pot due to condensation of steam at high temperatures and rice in the pot at low humidity. Drying and yellowing can be reduced. In addition, the opening / closing device controls the presence / absence of pressure, and at the same time, serves as a safety device that eliminates excessive pressure by ejecting steam and prevents an excessive rise in pressure, thereby ensuring safety.

[0008]

However, it is difficult for the rice cooking performance to be improved by reducing the heat to prevent the droplets from being easily scattered to the outside and contaminating the rice cooker main body and the table. In addition, it is difficult to maintain the opening / closing device and the lid. In addition, the firepower had to be reduced to prevent spillover, and it was difficult to obtain plump and good-tasting rice. Further, a wall was required between the on-off valve unit and the lid to prevent steam leakage.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to improve rice cooking performance by cooking rice without splashing outside and without weakening the heat for preventing splashing. I do.

[0010]

In order to solve the above-mentioned problems, the present invention provides a rice cooker having an opening / closing device for opening and closing a steam outlet, wherein the opening / closing device is a vertically movable opening / closing valve unit. The on-off valve unit has a cylindrical steam cylinder having a vent on the top surface, a core plate supporting the steam cylinder and having a cylindrical flange, a valve for opening and closing a steam outlet, and the valve. The lower end surface of the valve holder is located lower than the upper end surface of the steam outlet regardless of the up / down movement of the on-off valve unit.

[0011]

The invention according to claim 1 is provided with an opening / closing device for opening and closing a steam outlet, wherein the opening / closing device has an up / down movable on / off valve unit, and the on / off valve unit comprises:
A cylindrical steam cylinder having a vent on the top surface, a core plate that supports the steam cylinder and has a cylindrical flange portion, a valve that opens and closes a steam outlet, and a valve holder that holds the valve, The lower end of the valve holder is located lower than the upper end of the steam outlet, regardless of the vertical movement of the on-off valve unit. This has the effect of preventing the splashing of the splash to the outside and of improving the rice cooking performance by cooking the rice without reducing the heat for preventing the splashing.

According to a second aspect of the present invention, there is provided an opening / closing device for opening and closing the steam outlet, wherein the opening / closing device has an up / down movable on / off valve unit, and the on / off valve unit has a vent on a top surface. A tubular steam cylinder arranged, a steam cylinder holder supporting the steam cylinder, a valve provided on the steam cylinder holder for opening and closing a steam outlet, a valve holder holding the valve, and the on-off valve unit on a lid. A lower end face of the valve holder is located lower than an upper end face of the steam outlet, regardless of the up / down movement of the on / off valve unit, thereby closing the on / off valve unit. It can be removed from the body, and has the effect of improving the careability.

According to the third aspect of the present invention, the liquid matter retaining tank is provided below the periphery of the steam outlet, so that the rice waste that has come out together with the steam flow during the heating of rice cooking does not go outside the lid. By stopping, while improving the performance of spilling over the rice, the rice can be cooked without weakening the heating power during the heating of the rice, and the rice has a function of obtaining full and good-tasting rice.

According to a fourth aspect of the present invention, the steam cylinder and the steam cylinder holder are provided with a flange portion that should correspond to each other, so that the steam cylinder collar portion and the steam cylinder holder collar can be opened and closed when the on-off valve unit is opened and closed. A water seal phenomenon occurs due to the above-mentioned water droplets at the part where the part contacts, preventing the vapor from leaking from the outside of the on-off valve unit vent to the outside of the lid, and there is no wall surface between the on-off valve unit and the lid. It has the effect of preventing steam from leaking out.

[0015]

【Example】

Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
A description will be given based on FIG. A bottomed cylindrical pot 2 is detachably provided in the main body 1. The lid 3 is the cooker body 1
Is rotatably supported by a shaft 4 on one side of the upper opening of the
In addition, the upper surface opening is covered. The lid 3 is composed of an outer lid 5 made of a synthetic resin such as polypropylene (PP) constituting the upper surface, and a lid cover 6 made of aluminum or the like having good thermal conductivity also constituting the inner surface. The pot packing 7 includes the outer lid cover 8 and the lid cover 6. The pot packing 7 is attached by being interposed between the outer cover 8 and the lid cover 6 which are fitted and fixed to the outer lid 5, and when the lid 3 is closed, the entire circumference of the pan opening is formed on the upper opening of the pan 2. Abuts.

The cylindrical packing 9 is mounted so as to be located between the periphery of the steam outlet and the periphery of the steam hole 11 of the cover 6. 22 is an on-off valve unit,
A core plate 13 having magnets 14 and a vent 2
The steam cylinder 16 includes a steam cylinder 16 having a valve 3a, a valve 18a whose mass is set to float by a vapor pressure 23c by a steam pressure when the pressure exceeds a predetermined pressure, and a valve holder 17 supporting the valve 18a and abutting on the steam cylinder 16. ing. Reference numeral 12 denotes an opening / closing valve power unit, which is constituted by a motor 12a, a support base 12b, a plate 12c, and a north-south / south-side double-sided steam magnet 12d. The on-off valve unit 22 is moved up and down by the attraction and repulsion with the core plate-side magnet 14 (detailed description of the on-off valve power unit 12 is omitted). Reference numeral 20 denotes a heating device, which is located below the pot 2, 25 denotes a temperature sensor, which measures the surface temperature of the pot 2, 21 denotes a control board, and the heating device 20 and the opening / closing valve power unit. 12 is performed.

In the above configuration, when pressurizing rice during cooking, the pan 2 is heated by the heating device 20 and the pan 2 is heated.
3c, the opening / closing valve unit 22 is lowered to the lower position,
Is closed by the valve 18, so that the pressure in the pot is increased due to the rise in the temperature in the pot. When the pressure is reduced, the on-off valve unit 22 is set to the raised position and the vent hole 23c is opened,
The inside of the pot and the outside air are vented 23a, vent 23b, vent 23
(c) communicates to release steam and reduce pressure. Further, the rib portion 14 of the valve holder located at the lowermost portion of the on-off valve unit can separate the outflow from the inside of the lid from the steam flow, so that the splash does not come out to the outside, and furthermore, the thermal power is used to prevent the splash. Cooking rice without weakening improves rice cooking performance.

(Embodiment 2) Next, a second embodiment will be described with reference to FIGS. The cylindrical packing 9 is attached so as to be located between the periphery of the steam outlet and the periphery of the steam hole 11 of the lid cover 6. Reference numeral 22 denotes an on-off valve unit, which is a steam cylinder 16 having a magnet 14 and having an air vent 23a on the top surface, and a valve 1 having a mass set so as to float through the air vent 23c by the vapor pressure when the pressure exceeds a certain pressure.
8a, the steam cylinder 16 supporting the valve 18a, the valve holder 17 in contact with the steam cylinder 16, a steam cylinder holder 19 having a vent and supporting the steam cylinder, and a steam cylinder packing 20 made of circular rubber. ing. Reference numeral 12 denotes an opening / closing valve power unit, which is composed of a motor 12a, a support base 12b, a plate 12c, a N-pole S-pole double-sided steam magnet 12d, and a magnet 12d.
By moving the N-pole and S-pole positions, the on-off valve unit 22 is moved up and down by adsorption and repulsion with the steam cylinder side magnet 14 (detailed description of the on-off valve power unit 12 is omitted). Reference numeral 20 denotes a heating device, which is located below the pot 2; 25, a temperature sensor that measures the surface temperature of the pot 2; 21, a control board;
0 and the opening / closing valve power section 12 are controlled.

The on-off valve unit is fixed to the lid by a steam packing 20 made of circular rubber. This allows
The on-off valve unit can be detached from the lid, and has an effect of improving the careability.

(Embodiment 3) A third embodiment will be described with reference to FIG. A liquid substance retaining tank is provided below the vapor outlet 23c. This makes it possible to improve the spill-over performance by stopping the litter that came out with the steam flow during the heating of the rice so that it does not come out of the lid. It has the effect of obtaining plump and good-tasting rice.

(Embodiment 4) A fourth embodiment will be described with reference to FIG. When the switchgear is lowered, the steam cylinder holder flange 19a and the steam cylinder are in contact with each other. This causes a water seal phenomenon due to the water droplets of the steam, and prevents the steam from leaking to the outside of the lid from a portion other than the on-off valve unit vent. When the switchgear is raised, the steam cylinder flange 23b and the steam cylinder holder are in contact with each other. As a result, a water sealing phenomenon due to water droplets of the steam is generated, and the steam is prevented from leaking from the outside of the on-off valve unit vent to the outside of the lid. Due to these effects, even if there is no wall portion between the on-off valve unit and the lid, there is an effect that steam does not leak.

[0022]

As described above, according to the first aspect of the present invention, the pressure and humidity in the pot can be freely controlled during rice cooking and heat keeping, and the rice can be generated from the pot with the steam flow during rice cooking. It is possible to separate the noodles from the steam flow, to prevent splashes from getting out, and to improve the rice-cooking performance by cooking rice without reducing the heat to prevent the splashes.

According to the second aspect of the present invention, the on-off valve unit can be detached from the lid, and the maintenance can be improved.

According to the third aspect of the present invention, by improving the performance of spilling over the rice by heating the rice cooked together with the steam flow so as not to come out of the lid at the time of heating the rice cooker, It has the effect of making it possible to cook rice without weakening the heat power and to obtain plump and good-tasting rice.

Further, according to the invention of claim 4, it is possible to prevent the steam from leaking from the outside of the on-off valve unit vent to the outside of the lid, and even if there is no wall surface between the on-off valve unit and the lid. Has the effect of preventing steam from leaking out.

[Brief description of the drawings]

FIG. 1 is a cutaway cross-sectional view of a rice cooker according to an embodiment of the present invention around a lid.

FIG. 2 is a sectional view of a main part of the lid of the rice cooker.

FIG. 3 is a sectional view of another essential part of the lid of the rice cooker.

FIG. 4 is a sectional view of a conventional rice cooker.

[Explanation of symbols]

 1 rice cooker body 2 pot

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Atsushi Tanaka 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] An opening and closing device for opening and closing a steam outlet is provided.
The opening and closing device has an opening and closing valve unit that can move up and down,
The on-off valve unit includes a tubular steam cylinder having a vent on the top surface, a core plate supporting the steam cylinder and having a cylindrical flange, a valve for opening and closing a steam outlet, and a valve holding the valve. A rice cooker lid having a holder, wherein a lower end surface of the valve holder is located lower than an upper end surface of the steam outlet regardless of the vertical movement of the on-off valve unit. 2. An opening and closing device for opening and closing a steam outlet,
The opening and closing device has an opening and closing valve unit that can move up and down,
The on-off valve unit holds a cylindrical steam cylinder having a vent on a top surface, a steam cylinder holder supporting the steam cylinder, a valve for opening and closing a steam fluid port provided on the steam cylinder holder, and the valve. A valve holder and a steam cylinder packing for fixing the on-off valve unit to the lid, and the lower end surface of the valve holder is located lower than the upper end surface of the steam outlet regardless of the vertical movement of the on-off valve unit. Rice cooker lid. 3. The rice cooker lid according to claim 1, wherein a liquid substance retaining tank is provided below the periphery of the steam outlet. 4. The lid of a rice cooker according to claim 2, wherein the steam cylinder and the steam cylinder holder have flanges to correspond to each other.