JPS59186529A - Pressure regulating valve - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

Conventional Structure and Problems According to various data regarding rice cooking, the higher the rate of gelatinization of starch, which is the main component of rice, the sweeter it is, the better the digestibility and absorption, and the better the rice is cooked. It is said. This gelatinization is promoted by water and heat, and from a thermal point of view, it rapidly progresses around 100°C, and is said to accelerate further when the temperature exceeds 100°C, but it cannot be raised above 100°C. In order to raise the boiling point to 100°C or higher, it is necessary to increase the internal pressure inside the pot. Therefore, a pressure regulating valve consisting of a weight valve and a valve seat has been conventionally used as a pressure increasing mechanism. However, since this was the only pressure regulating mechanism, stable operation and high safety were expected.

OBJECTS OF THE INVENTION The present invention was developed in order to solve the above-mentioned conventional problems, and an object of the present invention is to provide a pressure regulating valve for a rice cooker, etc., which is safe and has stable operation. In order to do this, the present invention includes a resilient valve seat in which a through hole is formed in the vertical direction, and a weight valve that is placed on the valve seat, and an insertion portion that is inserted into the through hole in the weight valve. A large diameter portion is provided at the lower end of the insertion portion, a protrusion protruding toward the center is provided on the inner surface of the through hole of the valve seat, and the large diameter portion can be engaged with the protrusion from below. At the same time, a notch is formed in the protrusion 1. That's what it is,
A weight valve is held on the protrusion of the valve seat, and steam can be discharged from the notch.

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 the 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 detachable. On the other hand, the outer lid 6 and the handle 7 are integrally formed, a heat radiating plate 1o with a heat retaining heater 9 is attached to the lower surface via a lid insulating material 8, and a steam cylinder 11 is attached to the heat radiating plate 10 on the other side. It penetrates the through-hole portion of the lid 6. Further, the outer cover 6 is pivotally supported on the main body 1 by a shaft 12, and can be engaged with the main body 1 by a hook lever 13 on the other side. Reference numeral 14 denotes an inner lid made of an aluminum plate, with a backing 16 made of silicone rubber on the periphery for sealing the pot 5, a valve seat 16 made of silicone rubber for cooking rice under a constant pressure, and the lid can be attached and detached. It is equipped with a weight valve 17. In addition, the center part of the inner lid is equipped with a silicone rubber button 7 and 18.
It is configured to be detachable from the bottle 19 screwed onto the heat sink 10.

Next, the relationship between the valve seat 16 and the weight valve 17 will be explained in detail with reference to FIGS. 2-3.

The valve seat 1-6 has a through hole 2o formed in the center that penetrates in the vertical direction, and a rib 21 with a thinner wall at the upper end.
is formed, and a protrusion 22 protruding toward the center is formed on the inner surface of the through hole 20. In addition, this protrusion 2'
2K has a notch 23 formed therein and a dowel 24 formed on its lower surface. On the other hand, the weight valve 17 is integrally formed with an insertion portion 25 to be inserted into the through hole 20 and a thick diameter portion 26 formed at the lower end of the insertion portion 25. The large-diameter portion 26 can be engaged with the protrusion 22 from below. That is, the diameter a of the insertion portion 25 is equal to the diameter a of the protrusion 22.
The inner diameter of the protruding portion 22 is smaller than the diameter C of the thick portion 26.

In the above configuration, the valve seat 16 is made of silicone rubber and has elasticity, so that the weight valve 17 can be easily attached to and detached from the valve seat 16. Moreover, the notch 23 is completely formed in the protrusion 22, and the protrusion 22 is easily deformed when the weight valve 17 is attached or detached, thereby improving usability. Further, in normal use, the notch 23 prevents the steam exhaust path from being blocked by the protrusion 22, and stable pressure regulation is achieved. moreover,
The same thing happens if sticky rice or rice grains from cooking rice stick to the rice.

Effects of the Invention As is clear from the above description, according to the present invention, a pressure regulating valve with stable pressure regulating operation and high safety can be obtained.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the top of a jar rice cooker showing an embodiment of the present invention, Fig. 2 is a sectional view of the pressure regulating valve of the same jar rice cooker, and Fig.
The figure is a back view of the same. 16... Valve seat, 17... Weight valve, 20...
...Through hole, 22...Protrusion, 23...
Notch part, 25・old...insertion part, 26...large diameter part.

Claims (1)

[Claims] a resilient valve seat with a through hole formed in the vertical direction;
a weight valve placed on the valve seat; the weight valve is provided with an insertion part to be inserted into the through hole; and a large diameter part formed at the lower end of the insertion part; A pressure regulating valve comprising: a protruding part protruding toward the center on the inner surface of the hole; the large-diameter part can be engaged with the protruding part from below; and a notch is formed in the protruding part.