KR0128707Y1 - Electric rice cooker with heater - Google Patents

Abstract

The present invention relates to an electric rice cooker, in particular using an internal container (1) having a three-layer structure having a heat-retaining space as a cooking vessel, the upper heater 44 and the lower heater 43 on the upper and lower rice cookers And an electric rice cooker having a three-layered inner container and upper and lower heaters to improve food cooking conditions and to diversify the cooking purpose by installing a control device 62 for controlling an electric device required for operation of the rice cooker. It is about.

The electric rice cooker of the present invention has a tubular structure capable of accommodating the inner container 1 having a triple structure with a heat storage space portion 14 and the inner container 1 at a predetermined interval therein, and The lower portion of the rice cooker body portion 32 having a lower heater 43 that is elastically in close contact with the bottom of the inner container (1), the hinge is coupled to one side of the body portion 32 is installed, the upper heater 44 in the lower portion An electric rice cooker, comprising a built-in rice cooker lid portion 31, so that food does not stray or burn, and does not boil over, so that it can be cooked optimally and quickly, and the inner container 1 is separately Separately, cooking can be performed using other heat sources such as stoves.

Description

Electric rice cooker with triple inner container and upper and lower heaters

1 is a cross-sectional view of the inner container of the present invention.

2 is a bottom view of the inner container of the present invention.

Figure 3 is an overall side cross-sectional view of an electric rice cooker having a three-layer inner container and the upper, lower heaters according to the present invention.

4 is a plan view of the upper heater of the present invention.

5 is a cross-sectional view and a plan view of a steam discharge device of the present invention.

Figure 6 is an extract cross-sectional view of the rice cooker according to the present invention.

7 is a perspective view of an electric rice cooker according to the present invention.

* Explanation of symbols for main parts of the drawings

1: internal container 5: water vapor discharge device

11: inner barrel 12: middle barrel

13: outer cylinder 14: heat insulation space

15 air exhaust hole 16 heat actuator

17: discharge passage 21: handle

22: flat portion 23: concentric shape

31: electric rice cooker lid 32: electric rice cooker body

43: lower heater 44: upper heater

51: steam discharge groove 52: piston

53: cylinder 55: cylindrical bolt

61: front panel 62: control device

311: lid handle 313: lid case

314: insulation 315: endothelial

316: heat insulation plate 317: stainless steel plate

320: internal space 321: lid lock

325: hinge axis 331: case

332: insulation 333: inner skin

355: lower plate 336: upper plate

337,358 Hole 350,351 Temperature sensor

355,356: Bimetal

The present invention relates to an electric rice cooker, and in particular, a three-layer inner container having a heat storage space is used as a cooking vessel, a heater is installed on the upper and lower rice cookers, and various kinds of electric devices required for the rice cooker are controlled. The present invention relates to an electric rice cooker having a three-layered inner container and upper and lower heaters in which a control device is installed to improve food cooking conditions and diversify cooking applications.

Most electric rice cookers that have been used in the past are made of an inner container using materials such as aluminum, and then an inner container having a single layer structure coated with cobalt on the inner side of the container, and cooking and warming heaters are installed only at the bottom of the rice cooker. It consists of an insulated body and a lid with a steam outlet. The electric rice cooker thus made has a drawback in that heat during cooking is not uniformly transmitted to the entire container, and food that is cooked by being eccentrically transmitted from the bottom of the container is pressed or burned to the bottom of the inner container, and the food does not taste good.

On the other hand, the applicant is a utility model registration application No. 93-19086 of the application filed on September 21, 1993 as a container having a triple structure similar to that shown in Figs. It is possible to automatically regulate the temperature in the inner container 1 by discharging the air in the heat storage space by a heat sensitive actuator such as bimetal, and the inner cylinder 11 made of durable stainless steel and aluminum with high thermal conductivity The cooking container which consists of the outer cylinder 13 which were made was proposed. This cooking container prevents the cooking food from burning and maintains the temperature of the cooked food for a certain period of time.However, a cooking stove or an oven is used for cooking because it is necessary to use a gas stove or a petroleum furnace as a heat source for cooking. There was an inconvenience that can not be done, there was a problem that can not be convenient for various cooking.

The object of the present invention is to compensate for the above-mentioned drawbacks, and is provided with an inner container specially manufactured in a triple structure with a handle attached to enable a separate manual operation, and an upper heater above and below the inner container. It is to provide a more improved electric rice cooker that can efficiently cook a variety of various foods while effectively lowering the boiling and pressing of food during cooking by placing the lower heater.

In order to realize the object of the present invention, the electric rice cooker is composed of an inner container and a cooker body as follows.

First, the inner container is composed of three kinds of heat insulating space parts as follows. Consists of a metal with high thermal conductivity, and the bottom and top of the lower part are concave-convex shape for good heat transfer, and the concave-convex shape of the bottom is concentric to form a symmetrical flat part to prevent deformation due to high heat. An outer cylinder with a heat-sensitive actuator that automatically adjusts the temperature in the container, a middle cylinder made of the same material as the outer cylinder, and a constant temperature between the outer cylinder and the middle cylinder to facilitate heat absorption from the outer cylinder and facilitate heat transfer to the inner cylinder. It is composed of a heat insulating space formed like an air discharge passage to provide an effect and an overheat prevention effect, and an inner cylinder made of a durable and anti-rust metal, and a high frequency welded joint between an inner cylinder and a middle cylinder to prevent deformation due to high heat. Then, the inner container was constructed by attaching a handle to the outer cylinder.

The main body of the electric rice cooker installed in this way is composed of a lid portion and the body portion. First, the lid part is composed as follows.

Handle needed for handling, lid locker, water vapor discharging device, upper heater to prevent boiling of food during cooking while improving cooking efficiency, temperature sensor to detect temperature of upper heater, mold made of plastic The lid part is composed of a manufactured lid case, an inner space for enhancing the insulation effect, an insulation plate for forming the inner space, an insulation for insulation, and an inner shell surrounding the insulation.

The body part is composed as follows.

The bottom plate with holes through which the air discharged from the inner space of the inner container exits, springs and screws for buffering the upper and lower sides, the upper plate for heat shielding, and the hole formed in the upper plate are combined with the upper plate The bimetal to open and close according to the temperature, the lower heater coupled to the upper plate by screws and sleeves, the temperature sensor to measure the temperature of the inner container, the case made of plastic material, the insulation for insulation, and the insulation The body part is composed of a wrapping inner shell, a control device for controlling electrical devices, and a front panel displaying cooking conditions and a built-in operation switch.

Hinge coupling the lid portion and the body portion to construct a main body of the electric rice cooker, and the electric container was configured by mounting the above-mentioned inner container to the main body configured as described above.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 and 2 is a cross-sectional view and a bottom view of the inner container having a triple structure in the present invention, Figure 3 is a full side cross-sectional view of the electric rice cooker according to the present invention installed the inner container, Figure 4 is a top heater Top view of the. And, Figure 5 is a view showing a steam discharge device, and Figure 6 is an excerpt sectional view of the electric rice cooker according to the present invention.

First, with reference to FIG. 1 and FIG. 2, the structure of the inner container 1 and the function of each part are demonstrated.

Out of the three kinds of cylinders constituting the inner container 1, the outer cylinder 13 uses a metal having high thermal conductivity, for example, aluminum, aluminum alloy, or the like, for rapid heat transfer. Furthermore, the lower bottom portion 19 and the lower upper portion 18 of the outer cylinder 13 are formed in an uneven shape to increase the surface area in contact with the heat source to increase the heat absorption rate and to maintain the heat retention space 14. To increase the thermal conductivity and emissivity.

In addition, in order to prevent the shape deformation due to high heat, the uneven shape of the bottom surface of the lower portion of the outer cylinder 13 is a concentric circle shape 23 having a cross-shaped flat portion 22 for maintaining the top, bottom, left and right balance as shown in FIG. The flat portion 22 pattern may be any pattern as long as it is symmetrical.

The middle barrel 12 used the same material as the material of the outer cylinder 13 to facilitate heat absorption from the outer cylinder 13 and facilitate heat transfer to the inner cylinder 11.

The inner cylinder 11 is a durable metal to prevent damage to the cylinder from friction with a hard object such as an iron scouring pad or iron spatula, even when the thermal conductivity is slightly lower than that of the outer cylinder 13 and the intermediate cylinder 12. Phosphorus stainless steel was used as the material.

When the temperature rises to a high temperature, the heat-sensitive actuator (first bimetal) 16 installed on one side of the side wall of the outer cylinder 13 is operated to open the air discharge hole 15, thereby expanding the inside of the expanded thermal space 14. Air is discharged out of the outer cylinder 13 via the discharge passage 17 to prevent heat from being transferred rapidly and excessive temperature rise, so that food is not burned or pressed, and a heat-sensitive actuator when the supply of heat from the heat source is stopped. The air outlet hole 15 is closed due to the in-situ operation of the 16, thereby blocking the air flowing into the heat storage space 14 to reduce the air density, and as a result, the thermal conductivity becomes smaller, thereby dissipating heat inside the container. Preventing or mitigating the heat to form a heat insulating space 14 between the outer cylinder 13 and the inner barrel 12 to give a thermal effect of the container itself so that the heat lasts longer.

The joint part 8 of the inner cylinder 12 and the inner cylinder 11 is coated with flux adhesive and then subjected to high frequency welding so that the inner cylinder 11 and the inner cylinder 12 are separated or cracks are formed between the cylinders, thereby preventing heat transfer. Prevented

The end portion 7 of the inner cylinder 11 is multi-folded out to make the lid seat jaw 10, and then treated by a method of finishing bending and fixing it under the upper front 9 of the outer cylinder 13 to fix it. By attaching the handle 21 to the inner container 1, this inner container 1 was placed on a gas stove or the like separately to produce the necessary cooking.

Next, the structure and each part of an electric rice cooker main body are demonstrated.

First, the lid portion 31 of the main body is described, the handle 311 (see FIG. 6) necessary to open and close the lid, the lid lock 321 using the bent metal body and the spring, and in the container Steam discharge device consisting of a cylinder 53 made of plastic, a cylindrical bolt 55 made of stainless steel, which opens the steam discharge groove 51 and discharges water vapor when the piston 52 rises upward due to the pressure of the generated steam. (5) (see FIG. 3, FIG. 5) and the temperature of the upper heater 44 and the upper heater 44, which can prevent boiling of the food and increase the temperature according to the cooking purpose while increasing the cooking efficiency. A temperature sensor 351 for sensing, a temperature sensor 351 for sensing the temperature of the upper heater 44, a stainless steel plate surrounding and supporting the upper heater 44 and serving as a lid of the inner container 1 317, and a lid case 313 made of a plastic mold, It consists of an inner space 320 for enhancing the effect of heat, a heat insulating plate 316 for forming the inner space 320, a heat insulating material 314 for heat insulation, and an inner shell 315 surrounding the heat insulating material 314 have.

The body portion 32 of the rice cooker has a lower plate 335 having a hole 338 for discharging the air discharged from the heat storage space 14 of the inner container 1, and a spring 341 having a vertical buffering action. The upper plate 336 for heat shielding, which is coupled to the lower plate 335 with a screw 342 at an appropriate interval, and has a hole 337 formed therein, and a lower plate 335 to prevent heat loss due to inflow of external air. Second bimetals 355 and 356 for opening and closing the holes 338 formed in the rice cooker according to the temperature state of the rice cooker, and screw 339 and the sleeve 334 to the top plate 336, the temperature can be adjusted according to the cooking purpose The lower heater 43 is installed, the temperature sensor 350 for measuring the cooking temperature, the case 331 made of a plastic material surrounding the body from the outside, the insulation 332 for insulation, and the insulation 332 ) Endothelium 333 surrounding the display, and the front panel 61 displaying the cooking state and the operation means is installed, and each electric device And a control device 62 that controls, is the body part 32 is composed of an electric rice cooker main body is hinged to the lid part 31 and the hinge axis (325). The lower plate 335 is fixed to the bottom of the endothelial 333 by screws 340.

When the inner container 1 is mounted on the electric rice cooker body configured as described above, the entire configuration of the electric rice cooker having an inner container having a triple structure and upper and lower heaters is made.

Referring to the drawings the effect of the electric rice cooker as follows.

When the lid 31 of the cooker body 31 is opened and the contents to be cooked in the inner container 1 are placed inside the cooker body, the lower heater 43 is connected to the inner container 1 by the action of the spring 341. It adheres to the bottom. When the lid 31 is closed, the inner container 1 is sealed by the stainless steel plate 317 under the lid 31.

When the cooking method is selected using the front panel 61, the control device 62 supplies electricity to the upper heater 44 and the lower heater 43 in an amount corresponding to the selected cooking method. The heat transferred from the lower heater 43 is absorbed by the outer cylinder 13, and the heat absorbed by the outer cylinder 13 is transferred to the air in the heat storage space 14, and then is transferred to the heavy cylinder 12 again. The heat transferred to the barrel 12 is transferred back to the inner barrel 11 and the contents are cooked.

At this time, when the temperature of the inner container 1 continues to rise and becomes higher than the set temperature, the heat-sensitive actuator 16 is operated to open the air discharge hole 15 and the hot air in the heat storage space 14 is discharge passage 17. It is discharged out of the outer cylinder 13 via. The discharged air is discharged to the outside through the hole 338 of the lower plate 335 where the second bimetal 355 and 356 are operated by opening the dotted line shown in FIG. In this way, when the air density in the heat-retaining space portion 14 is lowered and the thermal conductivity is lowered, the amount of heat transferred to the container is reduced so that the rate of temperature increase in the container is not gentle or rises above the level.

The second bimetals 355 and 356 installed at the lower part of the upper plate 336 to open and close the holes 338 formed in the lower plate 335 are provided with external air introduced into the electricity when the cooking process of the rice cooker is finished. In order to prevent the internal heat of the rice cooker to flow out, when the temperature of the lower heater 43 is lowered below the set temperature, it operates again to the solid outline position of FIG. 3 to close the open hole 338 again.

The temperature detected by the temperature sensors 350 and 351 during cooking is compared with the temperature set when the cooking method is first selected in the control device 62, and when the temperature of the container is higher than the set temperature, the control device 62 By blocking the electricity supplied to the upper and lower heaters 44 and 43, the temperature in the container is prevented from being raised any longer. As soon as the heat supply is stopped and the temperature of the container is lowered, the heat-sensitive actuator 16 is operated in the home position to close the air discharge hole 15 to prevent the heat in the container from flowing out of the container. And when you want to keep warm food, the control device 62 controls the electricity supplied to the heater to maintain a constant temperature so as to maintain the warming temperature set in advance in the control device (62).

Further, the steam discharge device 5 will be described with reference to FIG.

The piston 52, which is in the solid line position due to its own weight before cooking starts, rises to the position shown by the dotted line as the steam pressure generated in the container increases, and when the piston 52 rises in this way, the steam The discharge groove 51 is opened to allow the water vapor to go out, thereby preventing overpressure in the container. When the pressure in the container is extinguished, the piston 52 is lowered to the solid line position to seal the inside of the container.

And, with reference to Figure 3 with respect to the heat insulation treatment structure of the cooker body, the body portion 32 is a heat insulating material 332, the inner shell 333 surrounding the heat insulating material 332 and the heat insulating material ( 332 was treated with a case 331 wrapping from the outside. In addition, the lid 31 is composed of a heat insulating material 314 and the inner shell 315 surrounding the heat insulating material 314, the cover case 313 to surround the heat insulating material 314 from the outside, the upper heater to increase the heat insulation effect An internal space 320 between the 44 and the heat insulating material 314 was formed in the upper and lower portions using the heat insulating plate 316.

As described above, since the present invention has a constant temperature function in the inner container 1 itself, the lower heater 43 is intermittently used instead of installing a separate warming heater that requires continuous electric supply operation even when warming as in the prior art. It is possible to realize the thermal insulation function more economically by driving with a. In addition, the present invention can be conveniently selected by using an internal vessel (1) having a constant temperature function and a pressure cooker function separately placed on a stove. Furthermore, when the inner container 1 is used in combination with an electric rice cooker, the cooking selection function and the functions of the upper and lower heaters 44 and 43 and the characteristics of the inner container 1 are combined with each other in general. Oven function similar to the oven cooker can be implemented as well as the temperature distribution in the inner container (1) by the simultaneous operation of the upper and lower heaters (44, 43) has a uniform characteristic up and down the food is boiled over or pressed Since no sticking occurs, foods with high taste and nutrition can be prepared as quickly as possible. In other words, the present invention is optimally and as quickly as possible without the addition of water, oil, baking, roasting, steaming, boiled, boiled, cooked, cooked, boiled, uncooked, uncooked, and boiled There is an effect that can be achieved.

Claims (3)

An inner container 11 having a triple structure of an inner cylinder 11, a middle cylinder 12 and an outer cylinder 13, and having a heat-retaining space portion 14 formed between the inner cylinder 12 and the outer cylinder 13; A body portion 32 having a tubular structure in which the inner container 1 can be housed and having a lower heater 43 elastically in close contact with the bottom of the inner container 1, and a vapor discharge device 5 And a lid 31 having an upper heater 44 and one side of which is hingedly coupled to the body portion 32, and includes a lower heater 43 and a lid portion of the body portion 32. Electric rice cooker having a three-layer inner container and upper and lower heaters, characterized in that the upper heater 44 of the 31 is operated at the same time to cook food in the inner container (1). The method of claim 1, wherein the lid portion 31 is a lid case 313 coupled to the body portion 32, the heat insulating means built in the lid case 313, the heat insulating means and a predetermined space The inner space 320 and the upper space 44, which is disposed below the inner space 320, the temperature control is possible according to the cooking purpose and the temperature of the upper heater 44 to increase the heat insulation effect formed The inner container of the triple structure, characterized in that composed of a stainless steel plate 317 to accommodate the temperature sensor 351 and the upper heater 44 and serves as a lid for the inner container (1) Electric rice cooker with upper and lower heaters. According to claim 1, wherein the body portion 32 is a cylindrical body having a heat insulating material 332 between the body case 331 and the endothelial 333, coupled to the lower portion of the endothelial 333 and for air discharge Bimetal 355 that is coupled to the lower plate 335 and the lower plate 335 is formed at a predetermined interval, and opens and closes the hole 338 of the lower plate 335 according to the temperature state in order to increase the warming effect. 356 is attached to the top plate 336 is formed with a hole 337 for air discharge, and the lower heater 43 is installed at a predetermined interval on the top plate 336 and the temperature can be adjusted according to the cooking purpose And, an electric rice cooker having an inner container and upper and lower heaters of a triple structure, characterized in that it comprises a temperature sensor 350 installed to detect the temperature of the inner container (1).