JPS627219Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cooking container such as an electronic rice cooker for heating and cooking food in a closed container.

When cooking food by heating it in a closed container,
The pressure inside the closed container gradually increases. Boosting the pressure raises the boiling point of the liquid in the closed container and increases heating efficiency, so there are pressure cookers that allow cooking to be done at high pressure, and electronic rice cookers that raise the boiling point of the liquid in the closed container and increase heating efficiency. , an inner container lid that is applied to the inner container, and a container lid that is applied to the container body so as to press the inner container lid against the inner container, and the steam generated in the inner container is released to the outside under certain conditions. The inner container is kept at an appropriate pressure, so that the rice can be cooked efficiently and deliciously. In this way, when setting or regulating the pressure inside a closed container for heating and cooking, when the inside of the closed container is at a predetermined pressure or higher, either open the valve to release steam and internal pressure, or constantly It only allows steam to escape under certain limits.

For this reason, although the user knows that the pressure is being regulated based on the movement of the valve exposed to the outside and the amount of steam coming out, the user cannot know the specific pressure state, and in some cases They may even have concerns about whether cooking is proceeding properly or whether there is a risk of abnormally high pressure.

Therefore, it has been considered to detect the pressure inside the closed container and display it externally.For pressure cookers with a single-layer lid structure, as known from Utility Model Application Publication No. 57-51417, pressure is received inside the single-layer lid. The display can be easily connected to an external power source or display.

However, it is difficult to provide a pressure sensor in the case of an electronic rice cooker with a double lid structure in which a closed container is housed in a container body and the lid of the container is closed from above the lid of the closed container.

The object of this invention is to provide a cooking container with a double lid structure in which a pressure sensor is provided with a simple mounting structure, reliable sensing of pressure inside the closed container, and easy connection to the outside.

In order to achieve this purpose, this invention is a cooking container that heats and cooks food stored in a container that is housed in the container. It is characterized in that it can be opened and closed, and a pressure sensor is provided on the suspension pin, so that the pressure inside the closed container is received through the suspension pin.

To explain the embodiment shown in FIGS. 1 to 3, the container body 1 includes an outer case 2 and a container-shaped inner wall 3, whose openings are connected by a shoulder member 4. A heat insulating material 5 is placed between the container 2 and the inner wall 3 to form a heat insulating container. Vessel 1
An inner container 6 for cooking rice and keeping it warm is housed inside, and is placed on a heating plate 8 with a built-in rice cooking heater 7 installed on the bottom 3a of the inner wall 3, and is heated by the heater 7 to cook the rice. will be held. A heat-retaining heater 9 is wound around the outer periphery of the mouth of the inner wall 3, and is energized instead of the heater 7 when rice cooking is completed to keep the rice cooked in the inner container 6 warm. Reference numeral 10 denotes a temperature-sensing element for switching between rice cooking and heat retention, which detects a rise in temperature due to the lack of water at the end of rice cooking and switches power supply from the heater 7 to the heater 9.

The inner container 6 is covered with an inner container lid 11, and the container body 1 is covered with a container lid 12. The container lid 12 is pivoted to one side of the shoulder member 4 of the container 1 and can be opened and closed. The closed state is maintained by engaging the lock lever 14, which is pivotally supported on the free end side, with a locking portion on the container body 1 side. The inner container lid 11 is
By fitting the elastic hole 16 formed by attaching the seal bush 15 in the center to the extended head 17a of the hanging pin 17 protruding from the back surface of the container lid 12, the container lid 12 It can be opened and closed integrally with it, and is suspended so that it can be attached and detached at will. The hanging pin 17 is attached to a heat dissipation plate 19 attached to the center of a back plate 18 forming the back surface of the inner container lid 11.
It is attached together with a lid heater 20 for preventing dew condensation during heat retention, which is applied to the inside of the lid, and a press seal bushing 21 is further attached to the base of the pin 17, and when the container lid 12 is in a closed state, the inner container is While pressing the lid 11 onto the inner container 6,
The gap between the bush 15 and the pin 17 is closed.

A steam cylinder 23 is attached to the inner container lid 11 for releasing the steam inside the inner container 6 through the through hole 22 of the container lid 12. A valve body 24 provided in the middle of the steam cylinder 23 is pushed up by the steam pressure each time the pressure inside the inner container 6 exceeds a predetermined pressure, and releases steam, thereby maintaining the inside of the inner container 6 at a predetermined pressure. This pressure regulating action is performed by the valve body 2.
4 can be observed from the outside as a piston movement that moves up and down repeatedly.

At the upper end of the suspension pin 17, as shown in FIGS. 1 and 2, a pressure sensor 26 is provided which receives the internal pressure of the inner container 6 through the through hole 32 in the suspension pin 17. The pressure sensor 26 uses, for example, a semiconductor pressure sensor having a silicon diaphragm on its pressure-receiving surface, and senses the pressure inside the inner container 6 with the silicon diaphragm part to obtain an electric signal corresponding to the pressure. The pressure sensor 26 is connected to the suspension pin 17
It is held in a holder 27 screwed onto the upper end, and the pressure receiving surface 26a is made to face the upper end of the through hole 32.
2 so that the pressure inside the inner container 6 can be received by the pressure receiving surface 26a.

The electrical signal from the pressure sensor 26 is applied to a control circuit 29, as shown in FIG. In addition to activating the alarm means 44 such as a buzzer, the firing angle of the triax 31 provided in the power supply circuit of the heater 7 is controlled according to the sensed pressure, and the heat generation of the heater 7 is suppressed when the pressure is high. When the pressure is low, it is increased. Heat generation control of the heater 7 performs a pressure regulating function to maintain a constant pressure inside the inner container 6, and is used when the valve body 24 becomes difficult to move due to sticky substances or when the pressure regulation is not perfect. It will be helpful in case.

When the pressure sensor 26 is attached to the lower end as shown in FIGS. 4 and 5, the structure is simplified. In the case of FIG. 4, pressure is applied to the pressure receiving surface 26a through the through hole 34 of the screw-on lid 33 at the lower end of the pin 17, and in the case of FIG. I try to accept pressure.

FIG. 7 shows the steam cylinder 23 attached to the vessel lid 12.
A pressure regulating valve body 41 biased in the opening direction by a spring 40 is provided, and an electromagnet 43 facing the magnetic body portion 42 fixed to the valve body 41 is installed inside the steam cylinder 23 to open the valve body 41. While attracting the electromagnet 43 in the closing direction, the electromagnet 43 is controlled to have an attractive force according to the pressure detected by the pressure sensor. As a result, the balance position of the valve body 41 due to the attraction force of the spring 40 and the electromagnet 43 is changed, and the valve body 41 is automatically adjusted to an opening degree according to the pressure inside the inner container 6, thereby maintaining a constant pressure inside the inner container 6. to hold.

Although the above-mentioned embodiment shows only the case of an electronic rice cooker, the present invention can be applied to any pressure cooker or other double-lid cooking container in which the internal pressure increases.

According to this invention, a cooking container with a double-lid structure can be provided with a pressure sensor that senses the pressure inside the closed container, allowing worry-free use.

In particular, the pressure sensor is installed on a suspension pin that allows the container lid to be opened and closed at the same time by suspending it from the container lid, and receives the pressure inside the closed container through the suspension pin. The sensor can be attached to the outer lid of the container using the existing hanging pin without any special mounting parts, making it easy to connect to an external power supply, display, etc., and the hanging pin can also be installed inside the lid of the inner closed container. Internal pressure can be reliably received without any special communication structure.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of one embodiment excluding a part, Fig. 2 is an enlarged view of the main part, Fig. 3 is an electric circuit diagram, and Figs. 4 and 5 are main parts showing different modifications. cross section,
FIG. 6 is a sectional view of a main part of another embodiment. 1... Container body, 12... Container lid, 6... Inner container,
11... Inner container lid, 17... Hanging pin, 32, 3
4...Through hole.

Claims (1)

[Scope of Claim for Utility Model Registration] A cooking container that heats and cooks food stored in a container, which can be opened and closed at the same time by suspending the lid of the container using a hanging pin. A cooking container characterized in that the hanging pin is provided with a pressure sensor, and the pressure inside the closed container is received through the hanging pin.