JPS5849708Y2 - Temperature controller mounting structure for rice cookers, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice cooker in which the rice cooker is heated from below the bottom by an electric heater.

When it comes to cooking rice, it has been said for a long time that you should not open the lid even if the baby cries when the eruption begins with a slow eruption, a mid-splash, and then a simmer. This corresponds to the fact that it is better to heat the rice slowly until the temperature in the rice reaches the gelatinization temperature, and then heat it strongly thereafter.

This is because in order for rice grains to gelatinize sufficiently, they need to absorb sufficient moisture, and if gelatinization occurs on the surface of the rice grains within a short period of time, the gelatinized portion will prevent water absorption. On the other hand, various enzyme activities in rice are activated by large amounts of water and temperature, and as a result, starch is broken down into dextrin and reducing sugars by enzymes such as amylase, which improves digestibility and taste in the body. The upper level gets better, but this enzyme is 70-80
Since it is inactivated when the temperature reaches around ℃, it is necessary to take sufficient time to reach this temperature, so it is necessary to heat slowly at a low temperature at first, whereas when the temperature reaches the gelatinization temperature If you do not heat the rice strongly afterwards and stir the rice vigorously, it will not be able to heat evenly, and if the rice is cooked for a long time after reaching the gelatinization temperature, the gelatinized starch will dissolve in the water and cause the rice to fall apart. If the cooked weight is the same, rice cooked at a heat that increases the amount of evaporation during boiling by adding a little more water will be more fragrant and delicious when the lid is removed, and the rice will reach the gelatinization temperature. After cooking, it must be cooked in a short time using strong heat.

For the above reasons, when cooking rice, the first heating state corresponds to a slow cooking state, and then the second heating state corresponds to a medium-hot state.
Important points are the timing of transition to the rice cooking heating state and the timing of transitioning to the second rice cooking heating state to quickly reach the heating temperature required in the second rice cooking heating state.

However, to date, no electric heater type rice cooker has been proposed that fully satisfies these two requirements.

An object of the present invention is to provide a rice cooker that can meet the above requirements.

To explain the embodiment, 1 is the main container of the rice cooker;
2 is a lid body.

Reference numeral 3 denotes an outer frame, on the inside of which a container inner wall 5 is formed with a heat insulating material 4 interposed therebetween.

6 is a rice bowl.

Reference numeral 7 denotes a rice cooking button, and when the rice cooking button 7 is pressed down, a lever 8 rises and a rice cooking switch 9 is turned on, and the permanent magnet 11 of the center thermostat 10 is attracted and held by the ferrite body 12.

13 is a hot plate, the rice bowl 6 is placed on the top surface of the hot plate 13,
There are also a first rice cooking heater 14 and a second rice cooking heater 15 inside.
are buried, and both heaters 14 and 15 are connected in parallel with each other.

FIG. 2 shows the electric heating circuit of the rice cooker. When the rice cooking switch 9 is turned on, the first rice cooking heater 14 is activated to start cooking rice.

The rice grains are gradually heated by the first rice cooking heater 14 while absorbing sufficient moisture.

The temperature-sensitive switch 16 for controlling the second rice-cooking heater is turned on at an appropriate temperature after the rice grains have sufficiently absorbed moisture, and from then on, the temperature-sensitive switch 16 for controlling the second rice-cooking heater is turned on at an appropriate temperature.
The second rice cooking heater 15 works together with the rice cooking heater 14 to alphanize the rice grains and cook the rice.

When rice cooking is completed, the permanent magnet body 11 of the center thermostat 10 falls off from the ferrite body 12, and the rice cooking switch 9 is turned off.

As a result, rice is cooked using the ideal two-stage heating method, which has been said since ancient times to produce eruptions that begin with a slow, slow, and sluggish eruption, and that even if a baby cries, the lid should not be removed.

When the rice cooking switch 9 is turned off, the first rice cooking heater 14, the second rice cooking heater 15, the heat retention lid heater 17, and the heat retention side heater 18 enter a heat retention state.

Reference numeral 19 denotes a side auxiliary heater, which is turned on and off at an appropriate temperature by a temperature-sensitive switch 20 for the side auxiliary heater to maintain the heat retention temperature.

The temperature-sensitive switch 16 for the second rice-cooking heater is then turned off due to a decrease in temperature.

Reference numeral 22 denotes a temperature controller, which is formed by attaching the temperature-sensitive switch 16 for the second rice cooking heater and the temperature-sensitive switch 20 for the side auxiliary heater of the electric heating circuit in a box that combines the heat receiving plate 23 and the back cover 24. A temperature controller 22 is attached to a cutout window 21 formed at an appropriate position on the side of the inner wall 5 of the container.

This temperature controller 22 has its heat receiving plate 23 side projected from the cutout window 21 to the rice bowl 6 side, and the heat receiving plate 23 is connected to the rice bowl 6 through an air layer sandwiched between the rice bowl 6 and the inner wall 5 of the container. Each temperature-sensitive switch 16.20 is arranged to face each other in close proximity, and receive radiant heat mainly from the rice grains in the rice bowl 6 with the heat receiving plate 23.
While providing information on the temperature inside the rice cooker 6 to
In order to suppress as much as possible the information on the temperature inside the rice cooker 6 from reaching the temperature-sensitive switch 16 for the second rice cooking heater via the heat plate 13, the rice bowl 6, and the heat-receiving plate 23, and to provide as accurate temperature information as possible inside the rice bowl 6 to each temperature-sensitive switch 16.20. I have to.

The temperature controller 22 is attached to the inner wall 5 of the container using a heat insulating member 26.
The scale and temperature controller 22 are prevented from being affected by the heat of the inner wall 5 of the container, and the back cover 24 blocks heat from the heat insulating material 4. Ventilation inside the box of the controller 22 is also ensured.

In addition, each temperature-sensitive switch 16.20 is attached to the inner surface of the heat receiving plate 23 in the box of the temperature controller 22, so that temperature information inside the rice bowl 6 can be obtained more accurately, and temperature control on the inner wall 5 of the container can be performed. When installing the device 22, each temperature-sensitive switch 16, 20 is installed in the heat receiving plate 23 in advance, so that the installation can be easily performed.

According to the present invention, the first heating plate, which heats the rice bowl from below the bottom thereof, is connected in parallel with the heating plate. Second rice-cooking heaters are provided, and the first rice-cooking heater is turned on during rice cooking, while the second rice-cooking heater is turned on at an appropriate temperature after the rice grains have sufficiently absorbed water during cooking, and the second rice-cooking heater is turned on during the first cooking. Since it was designed to heat the rice together with the heater, when the second rice cooking heater is turned on, it quickly generates heat and can quickly change from the low temperature heating state of the first rice cooking heater to the required high temperature heating state, and the heat receiving plate and back A temperature controller equipped with a temperature-sensitive switch for controlling a second rice cooking heater is attached to a cutout window formed on the side of the inner wall of the container in a box formed by combining the cover, and the temperature controller is attached to the cutout window formed on the side of the inner wall of the container and the rice cooker. Since the heat-receiving plate is placed opposite the rice bowl with an air layer between them, the temperature-sensitive switch prevents heat influence from the heater and the inner wall of the container that receives heat conduction from the heater, and also prevents the heat receiving plate from being affected by the heat from the adjacent rice bowl. temperature information can be obtained more reliably, and as the rice cooking progresses, the second rice cooking heater can be turned on at an appropriate timing that is more in line with the condition of the rice grains in the rice cooker. Rice cooking is achieved reliably and appropriately.

In addition, the temperature controller has a heat receiving plate and a back cover joined together to form a box, and a temperature-sensitive switch for controlling the second rice cooking heater is installed inside this box, so the heat receiving plate can be used to provide temperature information inside the rice cooker. The received heat is effectively stored in the box, and the temperature-sensitive switch for controlling the second rice cooking heater can accurately respond to temperature information from the rice cooker, making rice cooking by two-stage heating even more effective. Not only can it be ensured and appropriate, but it is also extremely easy to assemble, as it can be assembled by installing the temperature-sensitive switch in the box in advance and then attaching the temperature controller to the inner wall of the container. become.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a rice cooker showing an embodiment, FIG. 2 is an electric heating circuit diagram of the rice cooker, and FIG. 3 is a partially enlarged sectional view of FIG. 1.

Claims (1)

[Scope of utility model registration request] At the bottom of the container that houses the rice bowl, there is a heating plate that heats the rice bowl.
A first rice cooking heater and a second rice cooking heater are provided which are connected in parallel to each other, and the first rice cooking heater is turned on during rice cooking, while the second rice cooking heater is turned on after the rice grains have sufficiently absorbed water during cooking. The temperature controller, which is turned on at an appropriate temperature to heat the rice together with the first rice cooking heater, has a temperature sensitive switch for controlling the second rice cooking heater installed in a box formed by combining a heat receiving plate and a back cover. A rice cooker, characterized in that the heat receiving plate is attached to a cutout window formed on a side of an inner wall and faces the rice cooker through an air layer sandwiched between the side of the inner wall of the container and the rice cooker. .