JPS6342885Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rice-cooking sheet that is placed on the bottom of a commercial rice cooker to provide cooked rice without burning.

Traditionally, after cooking rice, the presence of char on the bottom of the pot was indispensable as a condition for delicious cooking, but due to commercial restrictions on rice cookers for commercial use, it was impossible to use rice cookers that could not be charred. Because of this demand, we were forced to use what is called a rice cooking sheet. This rice cooking sheet is sometimes made of an aluminum plate and sometimes a Teflon glass sheet. In the case of an aluminum plate, if the bottom of the pot and the aluminum plate are not in close contact, there will be insufficient heat conduction and convection, resulting in unevenly cooked rice. In the case of Teflon sheets, the quality of the rice is good, but they have drawbacks such as high cost and durability, such as tearing and cutting.

The present invention was devised in view of the above circumstances, and its purpose is to provide rice that does not burn.

Next, one embodiment of the present invention will be described.

In FIG. 1, reference numeral 1 denotes a cylindrical outer case, and metal fittings 2 are fixed to the upper inner surface of the case at two opposing locations.
Reference numeral 3 denotes an inner case, and the upper end opening has an edge protruding toward the outer circumference, and metal fittings 4 are provided on the lower outer circumferential side of the edge at four locations approximately equally spaced at the same time as spacers 5 are fastened on the inner circumferential side of the upper edge of the edge. It is fixed. The other end of the metal fitting 4 is locked to the upper end of the outer case 1, and the lower part is fastened to the metal fitting 2 at two opposing locations with screws. The spacers 5 are slightly convex upward from the upper edge of the inner case 3, and the fastening parts are molded with a plastic material in a concave shape so that the heads of the fastening parts do not protrude, and are spaced at approximately equal intervals. There are 4 placed. Reference numeral 6 denotes a pot having a flange portion with an opening upper end projecting outward, and the lower end of this flange is placed on a spacer 5 and is detachably housed in the inner case 3 in a suspended state. As a result, a heating space is formed continuously between the outer periphery of the side surface of the pot 6 and the lower part of the bottom. A lid 7 has a knob 8 and is placed on the flange of the pot 6 and closed. Reference numeral 10 denotes a bottom plate having support legs 9, which is fitted and fixed to the lower end of the outer case 1. The bottom of the inner case 3 is formed with substantially annular ribs 11a and 11b that are convex toward the inner surface, and a vent hole 12 is formed on the inner peripheral side of the rib 11b. A reflector 13 for reflecting the heat of the heater toward the pan 6 is mounted on the upper surface of the ribs 11a, 11b, and is fixed to the bottom of the inner case 3 at the same time as the heater stand 14 is fixed. The outer circumferential side of this reflector 13 extends upward in a substantially arc shape, and the outer circumferential diameter has a slight gap with the inner diameter of the inner case 3. The inner circumferential side is formed into a convex shape, and a ventilation hole 15 is formed on the convex upper surface. Molded. The heater stand 14 is formed into an L-shape and has four notches 16 at the upper end, and three sheathed heaters 17, 18, and 19 are placed in the notches 16 to prevent the sheathed heaters from coming off upward. Heater holding bracket 20, 2
1 is fixed. To fix this heater stand 14, one of the mounting parts is formed into a crank shape, and the inner case 3
It is inserted and locked into a hole provided on the upper surface of the rib 11a at the bottom, and the other is fixed to a pot hole on the upper surface of the rib 11b with a screw via a reflector 13. The cross-sectional shape of the bottom of the pot 6 is a substantially spherical cross-section with a concave inner surface, and the distance between the three sheathed heaters and the bottom of the pot 6 is different from the cross-sectional shape of the pot bottom (the sheathed heater 17 is It is located higher than the sheathed heaters 18 and 19.A heat-sensitive device 22 is installed at the center of the bottom of the pot 6 to control rice cooking by sensing the pot temperature, and the area around it is protected from the influence of heat from the heating space. In order to avoid heat sensitive device outer case 23, heat shield ring 24, heat shield tube 25
is installed. The heat shielding ring 24 is formed from a plate of aluminum material into a cylindrical shape with a U-shaped cross section, and is fitted between the bottomed cylindrical outer case 23 of the thermal device and the sliding plate 26 of the thermal device by fixing them together. It is worn. The heat-sensitive device sliding plate 26 has three tabs 27 at approximately equal intervals on the bottom, and the tabs 27 can be bent into the tab through-holes formed in the heat-sensitive device fixing plate 28 fixed to the center of the bottom of the inner case 3. It is inserted and locked. A tab also protrudes downward from the bottom of the heat sensitive device 22, and is inserted and locked into a tab through hole formed in the heat sensitive device sliding plate by bending the tab. 29 is a coil spring that always biases the heat sensitive device upward; 30 is a coil spring that always biases the heat shield ring 24, the heat sensitive device outer case 23, and the heat sensitive device sliding plate 26 upward;
The spring force is increased compared to 9. 31 is a micro switch 32 which controls the rice cooking control operation of the heat sensitive device 22.
The bearing 3 of the frame 34 is attached to the operation plate 33 fixed to the outer case 1.
It is rotatably attached at 5. 36 is a lever knob for starting rice cooking.

Next, the operation of this embodiment configured as described above will be explained.

A rice cooking sheet 40 is spread on the inner bottom of the pot 6, and washed rice 37 and a predetermined amount of water 38 are stored in the pot 6. When you lower the lever knob 36 and start energizing,
The sheathed heaters 17, 18, and 19 generate heat and heat the pot 6. As the pot heats up, the temperature inside the pot rises and the rice 37 starts to absorb water, and after a predetermined period of time, the water in the pot 6 runs out, and when the temperature at the bottom of the pot 6 suddenly rises, a heat-sensitive device that is in close contact with the bottom of the pot 6 The temperature of the sheathed heaters 17, 18, and 19 also rises rapidly, and the operation of the heat-sensitive device 22 immediately cuts off the current, and the heat generation of the sheathed heaters 17, 18, and 19 is also stopped. However, sheathed heater 1
7, 18, and 19 have a large heat capacity, so even if the electricity is turned off and the heat generation is stopped, the temperature is maintained at several hundred degrees or more, further heating the outside bottom of the pot 6. At this time, since the temperature at the inner bottom of the pot 6 was 150° C. or higher in the experiment, charring was clearly observed.
However, when the rice cooking sheet 40 is provided at the inner bottom of the pot, scorching occurs between the inner bottom of the pot 6 and the rice cooking sheet 4.
There is only the side sandwiched between the rice cooker sheets 40 and the rice 37, and no burnt part is seen between the rice cooking sheet 40 and the rice 37. Further, since the rice cooking sheet 40 is made of silicone rubber, it is elastic, has good adhesion to the pot 6, is inexpensive, and poses no problem in terms of food hygiene. Also, pot 6
By ensuring that the rice cooking sheet 40 and the rice 37 are in close contact with each other, uneven cooking of the rice does not occur, and the performance of the rice cooker does not deteriorate. Furthermore, since it is made of silicone rubber, it is easy to use, and easy to clean and maintain.

Next, according to our experiments, the dimensions of the rice cooking sheet are: hole pitch a = 5 ~ 15 mm, through hole b = 1.5 ~
3 mm, and thickness c is best within the range of 0.3 to 1.0 mm.
In this case, the rice will be good without burning or uneven cooking during cooking. If the thickness c is less than 0.3mm, scorching will occur, and it will become difficult to use.
It has drawbacks that make it difficult to handle. When it becomes 1.0mm or more,
This has the disadvantage that heat transfer from the pot 6 is poor, resulting in poor rice quality and uneven cooking.

In addition, by making the through hole b' near the heat sensitive device 22 larger than the other through holes b, 3.5 to 4.5 mm,
It also prevents premature burning and produces fragrant melanoidin.

As is clear from the above explanation, when rice is cooked with the rice cooking sheet of the present invention provided at the bottom of a pot, the performance of the rice cooker can be maintained and rice without burnt or uneven cooking can be provided.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a rice cooker equipped with a rice-cooking sheet showing one embodiment of the present invention, FIG. 2 is a perspective view of the rice-cooking sheet, and FIG. 3 is a perspective view of essential parts of the rice-cooking sheet. 6...pot, 40...rice cooking sheet.

Claims (1)

[Scope of utility model registration request] A rice cooking sheet made of silicone rubber that is placed on the bottom of the pot and has a through hole.