JPS5839124Y2 - heating cooker - Google Patents

Description

[Detailed description of the invention] This invention relates to a cooking device that heats objects such as pots using the radiant heat of an electric heater covered with a protective tube. To provide a heating cooker capable of automatically cooking rice.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Reference numeral 1 denotes a rectangular cylindrical base with open upper and lower surfaces, and a bottom plate 3 having legs 2 is fixed to the lower surface.

Reference numeral 4 denotes a top plate having a circular opening 4a, which is placed in engagement with a retaining step 1a formed at the upper end of the base 1.

Reference numeral 5 denotes a substantially circular cover plate which is a part of a base made of, for example, an aluminum plate or a stainless steel plate, and this has a substantially circular convex portion 6 having an opening 6a in the center and a peripheral portion. An annular mounting portion 7 is formed which is bulged to approximately the same height as the projection 6, and a reflection 8 is an annular recess surrounded by the projection 6 and the mounting portion 7.

A backing 9 made of silicone rubber or the like and having a substantially U-shaped cross section is fitted to the outer peripheral edge of the lid plate 5, and is placed on the top plate 4 through the backing 9 so as to correspond to the opening 4a. It is placed.

Reference numeral 10 denotes a sheathed heater as an electric heater which is formed by inserting a heater wire through an insulating material into the inside of a protection tube made of, for example, a stainless steel tube, and is bent into an approximately annular shape. is connected to an outlet 12 fixed to the inner side of the placing part 7, and the central part is supported by a heat-resistant and insulating support 13 fixed to the upper surface of the reflecting part 8. The sheathed heater 10 is disposed above the reflecting section 8 at a predetermined interval.

The height of the above-mentioned mounting portion 7 is located above the upper surface of the sheathed heater 9 by a predetermined distance.

Reference numeral 14 denotes a magnetic thermoswitch placed in the center of the cover plate 5. To be more specific, 15 is a cylindrical thermoswitch that is inserted into the opening 6a so as to be movable up and down and whose upper end is closed. For example, the guide cylinder is made of aluminum, and has an annular step 15a formed on the outer periphery of the central part, and an opening 6a.
I try not to let it slip out.

Reference numeral 16 denotes a support plate located below the convex portion 6 and fixed to the back side of the cover plate 5 by welding or the like. Cylinder 15
A compression coil spring 17 is provided to urge the .

Reference numeral 18 denotes an insertion hole 16a formed in the center of the support plate 16.
A permanent magnet 20 is fixed to the upper end of the rod via a support 19.

21 is a guide cylinder 1 corresponding to the permanent magnet 20.
5 is a heat sensitive body made of a magnetic shunt material attached to the lower surface side of the upper end portion.

Reference numeral 22 denotes a circular spring receiving plate that is inserted through and fixed to the lower part of the rod 18, and the rod 1 is inserted between the upper surface of this plate and the lower surface of the support plate 16.
A compression coil spring 23 for biasing the rod 8 downward is arranged so as to surround the rod 18.

Reference numeral 24 denotes an operating lever whose middle part is rotatably supported by a support leg 25 protruding from the bottom plate 3, one end of which is rotatably connected to the lower end of the rod 18, and a knob attached to the other end. 26
protrudes outward from the front surface 1a of the base 1.

Reference numeral 27 is a microswitch that is closed when the knob 26 is pressed down to rotate the operating lever 24 in the direction of arrow A and the permanent magnet 20 is attracted to the heat sensitive body 21.

Reference numeral 28 denotes a stove switch provided on the front surface 1a of the base 1, and as shown in the electrical circuit diagram of FIG. 3, the micro switch 27 of the thermoswitch 14 and the sheathed heater 10 are connected in series to the power source Micro switch 27
A switch 28 is connected in parallel.

Reference numeral 29 denotes a pot for cooking rice, which is formed into a cylindrical shape with an outer diameter approximately equal to the outer diameter of the placing portion 7, and whose bottom surface is formed into a gentle arc shape with the center portion bulging slightly upward.

Therefore, when the bottom surface of the pot 29 is placed on the upper end of the mounting portion 7, the upper end portion of the guide tube 15 of the thermoswitch 14 is urged by the compression coil spring 17 and is pressed against the center portion of the bottom surface of the pot 29. Ru.

30 is a handle attached to the upper end of the pot 29; 31 is the pot 29;
It is a lid that closes the top surface of the

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

First, when rice is to be cooked, rice and water necessary for cooking the rice are placed in a pot 29 and placed on the placing portion 7.

Next, when the control lever 24 is rotated in the direction of arrow A by pressing down the knob 26 and the permanent magnet 20 is attracted to the heat sensitive body 21, the microswitch 27 is closed and the sheathed heater 10 is energized and generates heat.

When the sheathed heater 10 generates heat, the surface of the protection tube becomes red hot, and the heat from the upper surface is radiated directly to the bottom of the pot 29 , and the heat from the lower surface is reflected by the reflecting section 8 and radiated to the bottom of the pot 29 . The rice in the pot 29 is then cooked.

As the rice cooks, all the water in the pot 29 is absorbed by the rice, resulting in a so-called dry cooking state where the temperature of the bottom of the pot 29 rapidly rises.

Since the heat-sensitive element 21 is pressed against the bottom surface of the pot 29 via the guide tube 15, a sudden temperature rise on the bottom surface of the pot 29 reaches a single point, and the adsorption force acting between it and the permanent magnet 20 is reduced. Then, due to the spring force of the compression coil spring 23, the operating lever 24 is rotated back in the opposite direction of arrow A, and the microswitch 27 is opened.
Cooking will end automatically.

Next, when cooking fried rice or the like using a frying pan, the frying pan or the like containing the food to be cooked is placed on the placing portion 7 and the switch 28 is closed.

Then, in the same manner as described above, the sheathed heater 10 is energized and generates heat, and the frying pan is heated by the direct radiant heat from the sheathed heater 10 and the radiant heat via the reflection part 8,
Cooking is done.

In this case, the frying pan becomes hot because the food is dry-cooked with little moisture, but the thermoswitch 14
Since the sheathed heater 10 is energized via the switch 28 instead of closing the microswitch 27, the sheathed heater 10 is not cut off during cooking.

In addition, when performing general cooking of boiled food, the sheathed heater 10 is energized by closing the micro switch 27 of the thermo switch 14 as in the case of rice cooking, or by closing the switch 28 in the same manner as in the case of rice cooking. Cooking is done.

In this case, the micro switch 27 of the thermo switch 14
If you close the thermo switch 1, for example, if you forget to put food in the pot 29 and cook it empty, the thermo switch 1 will close.
Since the heat sensitive element 21 of No. 4 senses a sudden rise in temperature at the bottom of the pot and opens the microswitch 27, the pot will not be damaged due to dry cooking.

By the way, conventional electric rice cookers for cooking rice have a structure in which the bottom of the pot is placed in close contact with a hot plate made of cast aluminum with an electric heater embedded in it. However, according to this embodiment, direct radiant heat from the sheathed heater 10 and heat transmitted through the reflector 8 are difficult to be used for cooking other than rice cooking. Since the pot 29 is heated by radiant heat, the bottom surfaces of various pots with different bottom shapes can be placed on the upper end of the mounting section 7 and heated efficiently, and it is possible to perform not only rice cooking but also various other types of cooking. can.

Therefore, there is no need to prepare a rice cooker and an electric stove separately, and the installation space in the kitchen or the like can be reduced.

Furthermore, in this embodiment, since the sheathed heater 10 covered with a protective tube is used as the heat source, there is no chance of the heater wire breaking due to boiling over of cooked food.
In addition, since the sheathed heater 10 is separated from the bottom of the pot 29 and does not come into direct contact with it, the temperature of the protective tube of the sheathed heater 10 does not differ locally, and the whole body is red-hot to a uniform temperature. This prevents clutches from occurring due to local temperature unevenness in the protection tube.

In the first embodiment, the microswitch 27 and the switch 28 of the thermoswitch 14 were provided separately and connected in parallel, but instead, as shown in FIGS. 4 and 5, a movable contact piece A neutral off type changeover switch 33 in which two fixed contact pieces a, l) are provided facing each other may be used.

That is, when the knob 34 is pushed down, the contact pieces c and a are closed, and at the same time the lever 24 is rotated in the direction of the arrow A to perform the same function as the thermoswitch 14 described above. When the lever 34 is pushed up, it is in a non-interlocking state with the lever 24 and the contact piece c-1) is closed.
1) The switch 35 may be opened when the knob 35 is manually returned to the open position so as to have the same effect as the switch 28 described above.

FIG. 6 shows a second embodiment of the present invention, and shows the first embodiment.
Only the parts that differ from the figures will be explained.

That is, 32 is a bottomed cylindrical base having an outer diameter approximately equal to the outer diameter of the pot 29, and the lid plate 4 is directly engaged with and placed on the upper end of this base.

The switch 28 is omitted and only the thermoswitch 14 is provided.

Therefore, in this configuration as well, it is possible to not only cook rice but also cook boiled foods other than boiling rice in the same manner as in the first embodiment.

In addition to the sheathed heater, the electric heater may be one in which a heater wire is covered with a protective tube.

As explained above, the present invention can provide a heating cooker that can perform general heating cooking as a normal stove and can also automatically cook rice.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a perspective view, FIG. 3 is an electric circuit diagram, and FIGS. FIG. 5 is an electric circuit diagram and a perspective view of the main parts showing an embodiment different from the first embodiment, and FIG. 6 is a diagram corresponding to FIG. 1 showing a second embodiment of the present invention. In the drawing, 1 is a base, 4 is a top plate, 5 is a cover plate (base), 7
Reference numeral 8 indicates a mounting portion, 8 a reflector, 10 a sheathed heater (electric heater), 14 a thermoswitch, 27 a microswitch, 28 a switch, 29 a pot, 32 a base, and 33 a changeover switch.

Claims (1)

[Claims for Utility Model Registration] A base having 10 reflectors, an electric heater disposed above the reflector at a predetermined interval and covered with a protective tube, and a pot provided on the base. a mounting part for supporting the lower surface of the object to be heated at a predetermined distance above the electric heater, with the lower surface of the object to be heated being placed on the upper end;
a thermoswitch provided on the base so as to be in contact with the lower surface of the object to be heated placed on the mounting section, and configured to sense the temperature of the object to be heated and control the electric heater. Heating cooker. 2. The heating cooker according to claim 1, which is a registered utility model, characterized in that the thermoswitch has a switch device that opens and closes the electric heater with the thermoswitch inactive.