JPS5822642Y2 - rice cooker - Google Patents

Description

[Detailed description of the invention] This invention was designed to adjust the steam pressure inside the vessel by installing a valve seat in the ventilation path that communicates the inside and outside of the vessel, and by installing the valve body in the valve seat in a free-flowing manner. Regarding rice cookers.

With this type of conventional rice cooker, when opening and closing the lid,
The valve body, which is loosely placed on the valve seat in the air passage, loses its position and rice is cooked or kept warm in an oblique or vertical position, resulting in insufficient pressure regulation function during rice cooking. This method has disadvantages such as too much moisture evaporating during keeping warm, which causes the rice to dry quickly, and allows dust and other foreign matter to enter the container through the ventilation passages, making it unsanitary.

In this idea, one of the valve seat and valve body provided in the air passage is made of ferrite, and the other is made of magnet.During rice cooking, the ferrite receives heat from steam and becomes paramagnetic, so that the valve body becomes free with respect to the valve seat. A rice cooker that eliminates the above-mentioned drawbacks of conventional rice cookers by making the ferrite ferromagnetic and creating an adsorption effect between the valve seat and the valve body that allows the valve body to maintain its position relative to the valve seat at times other than when cooking rice. The purpose is to provide a jar.

To explain the embodiment, in FIG. 1, reference numeral 1 denotes a container body in which a rice bowl 5 is housed, and an outer container 2 and an inner container 3 are integrated at the upper part via a shoulder member 4. .

The vessel lid 6 that covers the vessel body 1 has its tail end connected to the exterior body 2 of the vessel body 1.
A hinge 7 is connected at the upper end, and the hinge 7 of the container lid 6
A lock lever 8 is provided on the edge facing the lock lever, and a lever receiver 9 is provided on the upper end of the exterior body 2 facing the lock lever.
Make it possible to connect and disconnect.

The vessel lid 6 is provided with a ventilation path 10 that penetrates between the upper and lower surfaces of the iron lid.

The ventilation passage 10 is constructed by holding the cylinder 11 on the upper surface of the container lid 6 with a flange portion 11a formed on its upper edge, and screwing the lower end onto the lower surface of the container lid 6.

An inner flange 11b is formed on the inner wall of the cylindrical body 11 constituting the air passage 10, and an annular valve seat 12 made of a magnet is seated on the flange, and the valve seat 12 is made of ferrite. A valve body 13 having a ventilation hole 13a is placed in a part thereof, and a jacket 14 having a ventilation hole 14a on its upper surface is screwed onto the inner wall of the cylinder 11, and the lower edge of the cap 14 and the inner flange 11b are connected to each other. The valve seat 12 is clamped and fixed.

Regarding the materials of the valve seat 12 and the valve body 13, conversely, the valve seat 1
2 may be made of ferrite, and the valve body 13 may be made of a magnet.

In this case, the material of the peripheral wall surrounding the valve body 13, that is, the cap 14 in this embodiment, must be made of a paramagnetic material such as synthetic resin so that the valve body 13, which is made of a magnet, will not be attracted.

The valve seat 12 and valve body 13 made of ferrite or magnet may be thinly coated with synthetic resin or the like to prevent corrosion.

In ordinary ferrite, the Curie point, that is, the temperature at which the ferrite is heated and undergoes a magnetic transition from a ferromagnetic state to a paramagnetic state, is 300 to 500°C. Ferrite is used as the material, with a single Curie point set near the heating temperature of the steam generated in the rice cooker when rice is cooked, by selecting an appropriate ratio.

A lid heater 16 is provided on the back side of the heat dissipation plate 15 that constitutes a part of the lower surface of the container lid 6, and a lid suspension pin 17 is suspended from a position corresponding to the center of the lower surface of the container lid 6.

The lid hanging pin 17 is provided with a pressure plate 19 that is pushed downward by a spring 18 to cover the rice bowl 5, and a vent hole 20a is provided in a part of the lid suspension pin 17.
A rice bowl lid 20 having a lid 20 is detachably locked so that the rice bowl lid 20 can close a rice bowl 5 as the lid 6 is opened and closed.

The above embodiment in which a ventilation passage 10 is provided directly in the lid 6 of the rice bowl 5 so that the inside of the rice bowl 5 and the outside world communicate with each other through the space S formed by the lid 20 of the rice bowl and the lower surface of the lid 6 of the rice bowl and the ventilation passage 10. For the fourth
In the figure, a cylindrical portion 20b is protruded from a part of the rice bowl lid 20 to form a ventilation passage 10, and the rice bowl lid 20 is attached to a lid suspension pin 17.
This is an embodiment in which the inside of the rice bowl 5 and the outside world are directly communicated through the air passage 10, with the cylindrical portion 20b of the rice bowl 20 facing outside the bowl through the insertion hole 21 provided in the lid 6 of the bowl.

In FIG. 4, reference numeral 22 denotes a pressure gasket, which replaces the pressure plate 19 in the embodiment of FIG.

The operation of the rice cooker of the present invention having the above structure will be explained with reference to the embodiment shown in FIG.
From a, the air passage 10 is reached through the space formed by the rice bowl lid 20 and the lower surface of the lid 6, but the high temperature steam generated before and after the rice is boiled in the rice bowl 5 is made of ferrite. When the valve body 13 is touched, the valve body 13, which had been in a ferromagnetic state and was attracted to the valve seat 12 made of a magnet in a horizontal position, undergoes a magnetic transition to a paramagnetic state, and the valve body 13 is attracted to the valve seat 12. The action is released and the valve body 13 begins to float due to steam pressure.

The steam pressure inside the rice bowl 5 is adjusted by the above-mentioned action.

When rice cooking is finished and high-temperature steam is no longer generated, valve body 1
3 transitions from a paramagnetic state to a ferromagnetic state, and the valve seat 12
It is attracted to a horizontal position.

Therefore, even if the container lid 6 is opened or closed after or before rice cooking, the valve body 13 will settle in a vertical or diagonal position with respect to the valve seat 12, and the rice will be cooked in that position and the pressure regulating function will not work. There will be no inconvenience such as excessive evaporation of water during keeping warm and hastening the drying of rice.

The above operation is exactly the same even when the valve seat 12 is made of ferrite and the valve body 13 is made of a magnet.

In the case of the embodiment shown in FIG.
The only difference from the embodiment shown in the figure is that other functions are the same as those of the embodiment shown in FIG.

According to this invention, even if the lid is opened or closed before or after cooking rice, the valve body is attracted to the valve seat and is regulated to a horizontal position, but the valve body remains in a vertical or diagonal position. This has the effect of eliminating inconveniences such as the pressure regulating function not working when cooking rice, or excessive evaporation of water during heat retention resulting in premature drying of the rice.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing an embodiment of this invention, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, Fig. 3 is an exploded perspective view of the main part of Fig. 1, and Fig. 4 is a different one. Vertical sectional view showing the embodiment, No. 5
The figure is an enlarged sectional view of the main part of FIG. 4, and FIG. 6 is an exploded perspective view of the main part of FIG. 4. 1... Container body, 2... Exterior body, 3...
...Inner container, 4...Layer member, 5...
Rice bowl, 6... Container lid, 7... Hinge, 8
...Lock lever 19...Lever receiver, 10...Vent passage, 11...Cylinder, 1
1 a...Flange part, 11 b...
Inner flange, 12... Valve seat, 13...
Valve body, 13a...Vent hole, 14...Cap, 14a...Vent hole, 15...
Heat sink, 16... Lid heater, 17...
・Lid suspension pin, 18... Spring, 19...
・Press plate, 20... Rice bowl lid, 20 a... Vent hole, 20 b... Cylindrical part, 21... Insertion hole, 22... Curved pressure gasket , S... Spatial part.

Claims (5)

[Scope of utility model registration request] (1) In a rice cooker in which a valve seat is provided in the air passage that communicates the inside and outside of the vessel, and a valve body is installed loosely on the valve seat to adjust the steam pressure inside the vessel, the valve seat and valve A rice cooker characterized by one body made of ferrite and the other made of magnet. (2) A rice cooker according to claim 1 of the utility model registration claim, characterized in that a ventilation passage is provided directly on the lid of the container that closes the opening of the container. (3) A cylindrical part protruding from the upper surface of the rice bowl cover, which is detachably provided on the back surface of the lid of the rice bowl to cover the rice bowl stored in the container body, forms a ventilation passage. A rice cooker according to claim 1 of the utility model registration claim, characterized in that a part of the lid faces outside the container. (4) A rice cooker according to claim 1 of the utility model registration claim, characterized in that the valve seat is covered with a material that does not cause corrosion, such as synthetic resin. (5) A rice cooker according to claim 1 of the utility model registration claim, characterized in that the valve body is covered with a material that does not cause corrosion, such as a synthetic resin.