JPS6148928B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a pressure regulating valve for a rice cooker or the like that employs pressure cooking.

Structure of conventional examples and their problems According to various data regarding rice cooking, it is said that the higher the rate of gelatinization of starch, the main component of rice, the sweeter it is, the better the digestibility and absorption, and the better the rice is cooked. This gelatinization is promoted by water and heat, and from a thermal perspective, it is said to progress rapidly around 100°C and further accelerate when the temperature exceeds 100°C. However, in order to raise the temperature above 100℃, the boiling point must be raised to 100℃.
Due to the above requirements, it is necessary to increase the pressure inside the pot. Therefore, conventionally, a pressure regulating valve consisting of a valve seat and a weight valve has been used, which is detachable for reasons such as cleaning considerations. For this reason, countermeasures have been taken, such as attaching a knob for attaching and detaching the weight valve as a separate part. In addition, the center of gravity of the weight valve is located below the contact surface with the valve seat, so the width of pressure fluctuation during control will be slightly larger as the weight valve is stable and is unlikely to fluctuate even with slight pressure fluctuations. It showed a trend.

OBJECTS OF THE INVENTION In view of the above circumstances, the present invention seeks to provide a pressure regulating valve whose pressure fluctuation width is small and whose constituent members are easy to clean.

Structure of the Invention To achieve the above object, the present invention includes a resilient valve seat in which a through hole is formed in the vertical direction, and a weight valve placed on the valve seat. It has an insertion part inserted into the hole, and a large diameter part formed at the lower end of the insertion part, and a protrusion part is provided on the inner surface of the through hole of the valve seat toward the center of the through hole, and
A flange is formed in the upper part of the weight valve, and the center of gravity of the weight valve is set above the upper end of the valve seat, thereby providing a pressure regulating valve for a rice cooker or the like with stable pressure regulating operation.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a main body of the device, which is composed of a cylindrical outer shell 2, a protective frame 3, a heat insulating material 4 interposed between the two, and the like. Reference numeral 5 denotes a pot serving as a rice cooking container, which has an arbitrary gap from the opening of the protective frame 3 and is detachably provided. On the other hand, the outer lid 6 and the handle 7 are integrally molded, and a heat sink 10 with a heat-retaining heater 9 is attached to the bottom surface via a lid insulating material 8.
A steam cylinder 11 is attached to the outer cover 6 and penetrates through a hole in the outer cover 6. Further, the outer lid 6 is pivotally supported on the main body 1 by a shaft 12, and is engaged with the main body 1 by a lid lever 13 on the other side. Reference numeral 14 denotes an inner lid made of an aluminum plate, with a silicone rubber packing 15 on the periphery for sealing the pot 5, a silicone rubber valve seat 16 for cooking rice at a constant pressure, and a removable weight valve. It is equipped with 17. Furthermore, a silicone rubber bushing 18 is provided in the center of the inner lid, and a heat dissipation plate 1 is provided.
It is configured to be detachable from the pin 19 screwed into the pin 19.

Next, we will discuss the configuration of the weight valve 17 and the valve seat 16 in the second section.
This will be explained based on the diagram.

A through hole 20 is formed in the vertical direction at the center of the valve seat 16, and a protrusion 21 that protrudes toward the center is formed on the inner surface of the through hole 20. Weight valve 1
7 has a collar part 22 at the upper part, a spherical lower surface convex downward in the center part, and is placed on the upper end of the valve seat 16,
A mounting portion 23 is formed in contact with each other. Also,
Below this mounting portion 23, there is an insertion portion 24 inserted into the through hole 20 of the valve seat 16;
A large diameter portion 25 formed at the lower end of is integrally formed. The large diameter portion 25 is located below the protrusion 21. In addition, the dimensional relationship of each part is as follows:
The diameter a of 2 is larger than the diameter b of the mounting portion 23, so that the collar portion 22 can be easily held by hand.
Further, the diameter e of the large diameter portion 25 is larger than the inner diameter d of the protrusion 21, and the diameter of the insertion portion c is smaller than the inner diameter d of the protrusion 21. The valve seat 16 is made of silicone rubber or the like and has elasticity, and the weight valve 17 is detachable. Further, there is a gap between the protruding part 21 and the insertion part 24, and the weight valve 17 can be moved horizontally within this gap, but the lower surface of the mounting part of the weight valve 17 does not move away from the upper end of the valve seat 16. There isn't. moreover,
The center of gravity G of the weight valve 17 is above the upper end of the valve seat 16 by an arbitrary height h.

In the above configuration, the user can easily and reliably attach and detach the weight valve 17 and the valve seat 16 without adding any additional parts due to the diameter difference between the weight valve 17 and the valve seat 16. Furthermore, since the center of gravity G of the weight valve 17 is located above the upper end of the valve seat 16, it operates with slight pressure fluctuations, making it possible to always adjust the pressure near the set pressure. This is because the equipment equipped with this weight valve 17 is not normally a vibrating body, so malfunctions do not occur. Further, the tilting of the weight valve 17 within the movable range can always be performed stably because the lower surface of the mounting portion 23 of the weight valve 17 is a downwardly convex spherical surface.

Effects of the Invention As described above, the present invention includes a weight valve placed on a resilient valve seat, and this weight valve has an insertion portion inserted into a vertical through hole formed in the valve seat. and a large-diameter portion formed at the lower end of the insertion portion, and a protrusion protruding toward the center of the through-hole on the inner surface of the through-hole of the valve seat, and the inner diameter of the protrusion is larger than that of the weight valve. The outer diameter of the large-diameter portion is smaller than that of the large-diameter portion of the valve, and a collar is formed at the top of the weight valve, and the center of gravity of the weight valve is located above the upper end of the valve seat. , the user can easily and reliably attach and detach the weight valve without adding any additional parts, it is also easy to clean, and the center of gravity of the weight valve is located above the top of the valve seat. Because it is located at .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the top of a jar rice cooker showing one embodiment of the present invention, and FIG. 2 is a sectional view of the essential parts thereof. 16... Valve seat, 17... Weight valve, 20... Through hole, 21... Projection, 22... Flange, 24...
Insertion part, 25...large diameter part.

Claims (1)

[Claims] 1. Equipped with a resilient valve seat in which a through hole is formed in the vertical direction, and a weight valve placed on the valve seat,
This weight valve has an insertion portion inserted into the through hole, a large diameter portion formed at the lower end of the insertion portion, and a protrusion that protrudes toward the center of the through hole on the inner surface of the through hole of the valve seat. and the inner diameter of the protruding portion is smaller than the outer diameter of the large diameter portion of the weight valve, and a collar is formed at the top of the weight valve, and the center of gravity of the weight valve is located above the upper end of the valve seat. Pressure regulating valve.