JPS60119912A - Pressure cooker - 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 non-stick device for a pressure cooker used in general households, particularly a pot. In the cooking device, as shown in FIG. ) 3 was fixed, and the operating section 2 was removable using screws or the like.

On the other hand, a pot 4 for heating the food to be cooked was placed on a heater 5, and a thermistor 6 for detecting temperature was in contact with the center of the bottom.

The heater 5 includes a protective frame 7 fixed inside the main body 1.
It was fixed to the bottom of a cylinder with a bottom. The temperature fuse 3 was provided on the main body 1 side of the operating section 2 and between it and the protective frame 7 for the following three reasons.

Reason 1: If the control circuit etc. malfunctions and the heater 7 is continuously energized, the temperature will rise abnormally, making it unsafe.＠A fuse 3 is installed near the heater 7, which stops the energization. It was attached to the back side of the removable operation unit 2 so that it could be easily serviced when the machine was opened.

Reason 2: The temperature fuse 3 is installed near the heater 7 because it is used to stop the power supply to the heater 7 when the temperature rises abnormally, but the temperature of the heater 7 during normal use increases to 200'C, which is close to 1. On the other hand, it is ideal for the temperature fuse 3 to operate at a temperature V10°C to 20°C higher than the 2oO'C in normal use, but with such a temperature difference, one temperature fuse 3 cannot be used. A heat-sensing fusible material called a pellet, which is attached to the heater, gradually melts and melts after 60 to 100 normal uses, making it inconvenient to use. A protective frame 7 was provided to slow down heat conduction, and the temperature fuse 3 was operated at a temperature around 140°C. i.e. 140"C'i 10℃~20℃
In order to exceed this temperature, the temperature of the heater must exceed 300°C, which makes it clear to distinguish between abnormality and normality. It's 1.
A protective frame 7 was provided to prevent the temperature fuse 3 from being directly exposed to water during cooking, and the temperature fuse 3 was provided between the protective frame 7 and the operating section 2.Reason 3: As stated above. The closer the heater 5 and the temperature heater 3 are, the faster the response will be in the event of an abnormality, but if they are too close, the pellets will gradually dissolve.Next, the inventors I considered installing a temperature fuse 3 near the thermistor. This is because the pot 4 uses water, so the temperature near the bottom of the pot does not rise above the boiling temperature of the water, and the temperature of the heater 3 rises rapidly when the water runs out and the pot is empty.

However, at this position, the thermistor 6 controls the food and detects the temperature slightly, so the heat generation is 1~.

It was difficult to arrange the temperature fuse 3, which has a large heat capacity, in the same vicinity as the thermistor 6, near the bottom of the pot.

In addition, the current capacity of pressure cookers has increased to 10A to 15A, and as a result, the thermal fuse 3 itself has become larger in size, and the shape for fixing the thermistor 16 has also become larger, resulting in an even larger heat capacity and the thermistor 16. There was a problem that the heat detection became worse.

In addition, with this configuration, due to variations in voltage and room temperature, when the temperature fuse 3 is activated, the contact area between the pot 6 and the heater 5 will reach 300°C.
As the temperature rises close to the surface, there are problems in terms of appearance, such as starch such as rice turning black and adhering to it, and performance problems, such as differences in heat conduction in the blackened parts.

This kind of blackening may be due to malfunctioning parts.

Although it is an abnormal situation such as dry cooking, those who eat brown rice every day, or those who eat soft fish bones and inexpensive sushi meat, which would normally be thrown away even by sick people or children, can eat brown rice every day. It's much cheaper than utility bills,
Moreover, electric self-regulating pressure cookers are used every day.

The use of this blackening agent 11 was inconvenient both for cooking and because it would leave a sticky residue when cleaning. Moreover, this kind of pot.

Aluminum materials are usually used, or even if they are replaced, they are expensive, which is inconvenient considering the burden on the user.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a pressure cooker that solves these conventional problems, improves the prevention of the pot from sticking, and improves the ease of repair service for the temperature heater.

Structure of the Invention In order to achieve the above-mentioned object, the structure of the pressure cooker of the present invention to prevent sticking is comprised of a cylindrical pot with a bottom, a heater for placing and heating the pot, and a heater placed in the center of the bottom of the pot. It is equipped with a temperature sensing part that is in contact with the outside, and a temperature fuse that senses the temperature.
The abnormal temperature rise of the heater is stopped by cutting off the temperature fuse ff:g near the bottom of the pot at the center of the heater. In order to reduce the size of this fuse, it is bent into an inverted V shape and fixed near the bottom of the temperature sensor in the heater center through hole.

DESCRIPTION OF EMBODIMENTS Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. IJ [I will explain about it. In FIGS. 2 to 4, 8 is a pot for heating the food to be cooked, and 9 is a heating body on which the pot 8 is placed, and has a through hole near the center of the bottom of the pot 8. The center through hole VC of the heating body 9 is formed by the outer case 10 having a plurality of claws 1.
1.11'. Inside this outer case 10, there is an inner case 13 that is pressed upward by the load of a spring 12.

On the other hand, it circumscribes the center of the bottom of the pot body 8. There is a heat-sensitive plate 14, an insulating plate 15 in contact with the lower part of the heat-sensitive plate 14, a thermistor 16 for detecting temperature, a protector 17 made of an elastic material that protects the thermistor 16 and makes it abut against the insulating plate 14,
There is a holding plate 18 made of a material with good thermal conductivity that holds the insulating plate 15, the thermistor 16, and the protector 17 on the heat-sensitive plate 14 side. Protective body 17. The holder 18 and the inner case 13 are assembled in this order, and the bottomed cylindrical upper flange of the inner case 13 and the opening of the heat-sensitive plate 14 are caulked and inserted into the inner case 13 in the above order. Fixed.

Further, a plate having a screw hole is fixed to the lower part of the inner case 13, and a heat sensing fusing element 22 is connected to an insulator with an inverted voltage of 19 VC.
It is fixed in the V-inner case 13 by screws 21 through the temperature fuse mounting hole 20 which is protected and fixedly supported in the shape of a letter.

In the above configuration, the function of the heat sensing fusing element (hereinafter referred to as a temperature fuse) 22 to prevent the pan body 8 from sticking in the case of an abnormal temperature rise will be explained.

When the water in the pot body 8 runs out, the temperature changes to 1 based on the information from the thermistor 16.
Although the energization to the heating element 9 is controlled to be stopped, if either the thermistor 16 or the control circuit fails, the heating element 9 starts to abnormally rise in temperature while being continuously energized.

The heat from the heating body 9 is transferred to the pot body 8. Heat sensitive plate 14. Holding plate 18 etc.
Alternatively, the width pair is passed through the outer case 1o, the inner case 13, etc., and then connected to the temperature fuse body 22.

It is transmitted by convection or conduction, and is fused.

In addition, in the unlikely event that the fuse body blows out, please use the screw 21.
In addition, since the thermistor 16 is disposed on the pot body 8 side, and heat is transmitted to the pot body 8, the thermistor 16, and the temperature fuse body 22 in this order, the heat of one thermistor 16 can be easily removed and replaced. There is almost no effect on sensing.

In the above embodiment, the temperature fuse body 22 is placed inside the inverted V-shaped insulator 19, but the point is that the temperature fuse body only needs to be located near the bottom of the thermistor 16, and furthermore, it can be placed outside the inner case 13. It suffices if the heat is received near the center of the heating element 9.

Effects of the Invention As is clear from the above embodiments, in the pressure cooker of the present invention, the temperature fuse body is shaped like an inverted V and is arranged near the center of the heating body near the opposite side of the pot body with the thermistor in the center. In addition, it is possible to detect the interruption of current supply to the heating element in the event of an abnormal temperature rise in about half the time compared to the conventional method, thereby preventing burning.

In addition, in the unlikely event that the temperature fuse blows out, it can be easily replaced by removing one screw.Furthermore, the inverted V-shaped configuration does not interfere with the heat detection of the thermistor, further improving performance than before. and.

It is possible to improve repairability.〇

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional pressure cooker, Fig. 2 is a sectional view of a pressure cooker showing an embodiment of the present invention - Fig. 3 is an exploded perspective view of the same essential parts, and Fig. 4 is a sectional view of a pressure cooker showing an embodiment of the present invention. It is an enlarged sectional view of the same main part. 8... Pot body, 9... Heating body, 16... Temperature detection element, 22... Temperature fuse body. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 (3) 2nd (3) WJ 3 Leap 4 Figure

Claims (2)

[Claims] (1) It has a pot body that heats the food to be heated, and a heating body on which the pot body is placed and heated, and a temperature detection element is provided in a through hole provided in the center of the heating body. A pressure cooker equipped with a temperature fuse body near the bottom of this temperature sensing element. (2) The pressure cooker according to claim 1, wherein the temperature heating body is AV-shaped.