KR102489811B1 - electric cooker - Google Patents

Abstract

An object of the present invention is to provide an electric cooker capable of minimizing heat loss by insulating the outside of an induction heating coil and a side heater. The electric cooker of the present invention for implementing this includes an inner pot in which food is accommodated; a coil base provided to surround a lower portion of the inner pot and to which an induction heating coil is mounted; It is provided to cover the outer surface of the inner pot, and includes a hollow case formed with a hollow part therein.

Description

electric cooker {electric cooker}

The present invention relates to an electric cooker, and more particularly, to an electric cooker capable of improving insulation performance.

In general, an electric cooker refers to an electric rice cooker, an electric pressure cooker, etc. used to cook cooking objects in normal businesses and households.

1 is a cross-sectional view showing a conventional electric cooker 1.

As shown in FIG. 1, a conventional electric cooker 1 includes a main body 10 equipped with heat generating units 12 and 14, a lid 20 provided to open and close the upper end of the main body 10, and the main body. It consists of an inner pot 30 inserted into the interior of (10).

The heating units 12 and 14 are induction heating coils 12; 12a and 12b provided at positions corresponding to the bottom surface and lower outer surface of the inner pot 30 and positions corresponding to the upper part of the outer surface of the inner pot 30. It consists of a side heater 14 provided in, and heats the inner pot 30, in which the cooking object is accommodated, during cooking and keeping warm. A coil base 11 on which the induction heating coil 12 is mounted is provided at the lower portion of the inner pot 30, and a coil holder 13 for supporting the lower portion of the induction heating coil 12 is provided.

On the front side of the main body 10, a substrate unit 60 including a control unit including a display device for displaying a cooking state, a microcomputer for controlling the cooking state, and control buttons is provided.

The coil base 11 is provided with a temperature sensor 50 for sensing the temperature of the inner pot 30, and the control unit operates the induction heating coil 12 and the side heater 14 according to the detected temperature and manipulation of the control button. to regulate the temperature of

A cooling fan 40 is provided below the substrate 60 , and cooling air generated by the cooling fan 40 is guided toward the substrate 60 .

The inner pot 30 heated by the induction heating coil 12 is cooled by outside air introduced through the through portion 15a formed in the base cover 15 under the main body 10 .

In the electric cooker configured as described above, the induction heating coil 12 is mainly operated and the side heater 14 is operated auxiliary to heat the inner pot 30 during cooking. In addition, when keeping warm, the side heater 14 is mainly operated and the induction heating coil 12 is operated auxiliaryly.

The outside of the induction heating coil 12 and the side heater 14 are not provided with a structure for insulation, so heat energy loss is large during cooking and keeping warm, and as a result, the temperature inside the inner pot 30 becomes non-uniform, resulting in a constant temperature There was a problem that water condensed on the part that was not maintained and the thermal insulation performance was lowered.

In addition, when reheating by operating the induction heating coil 12 and the side heater 14 to maintain the internal temperature of the inner pot 30, electricity consumption increases and heat stress is applied to the object to be cooked, resulting in poor taste.

Meanwhile, since high heat generated from the induction heating coil 12 must be cooled during cooking, the entire lower and outer sides of the induction heating coil 12 cannot be insulated. Therefore, there is a problem in that heat loss occurs through the lower and outer sides of the induction heating coil 12, which is not insulated.

As an example of such a conventional electric cooker, Korean Registered Office No. 20-0442900 has been disclosed.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an electric cooker capable of minimizing heat loss by insulating the outside of an induction heating coil and a side heater.

An electric cooker of the present invention for achieving the above object includes an inner pot in which food is accommodated; a coil base provided to surround a lower portion of the inner pot and to which an induction heating coil is mounted; It is provided to cover the outer surface of the inner pot, and includes a hollow case formed with a hollow part therein.

The hollow case may include an outer case that forms the hollow part between the inner case and the inner case surrounding the outer side of the inner pot.

An intermediate case may be provided to divide the hollow into a first inner hollow and a first outer hollow.

Upper and lower ends of the inner case may be stacked on upper and lower ends of the outer case, respectively, and a coil base support formed at an edge of the coil base may be stacked to press the inner case.

The upper end of the inner case and the upper end of the outer case may have one upper end formed in a ∩ shape and the other upper end supporting one end of the ∩ shape.

Between the inner pot and the inner case, a side heater portion may be provided to surround a side surface of the inner pot and generate heat during keeping warm, and an upper portion of the hollow case may surround an outer side of the side heater portion.

A base cover enclosing a lower portion of the coil base may be provided to form a lower space between the coil base, and a lower portion of the hollow case may be formed to at least partially surround an outside of the lower space.

When the inner pot is inserted into the hollow case, a plurality of inner pot guides for guiding an outer surface of the inner pot may protrude inward from an inner surface of the hollow case.

The hollow case may include a middle case forming a second inner hollow between the coil base and an outer case forming a second outer hollow between the middle case.

According to the present invention, heat loss can be minimized by allowing the hollow case to surround the space formed outside the induction heating coil and the side heater and below the coil base.

In addition, the middle case is provided inside the hollow case to form a double hollow part, thereby improving the heat insulating effect.

In addition, by configuring the middle case with a metal material, the middle case is also heated when the induction heating coil is operated, thereby increasing the temperature of the hollow part to further improve the insulation effect, and can block electromagnetic waves generated from the induction heating coil.

In addition, the plurality of cases constituting the hollow case are combined in a stacking manner, but the upper and lower ends are in close contact with each other, thereby simplifying the manufacturing process and easily forming the inside of the hollow case as an airtight space.

In addition, by forming a double hollow part using a hollow case composed of a coil base and two cases, it is possible to improve the insulation effect while using a minimum number of parts.

1 is a cross-sectional view showing a conventional electric cooker
Figure 2 is a cross-sectional and partially enlarged view showing an electric cooker according to a first embodiment of the present invention
3 is a plan view and A-A' cross-sectional view showing an electric cooker according to a first embodiment of the present invention
4 is an exploded perspective view and a partially enlarged view of a hollow case provided in an electric cooker according to a first embodiment of the present invention.
5 is a cross-sectional and partially enlarged view showing an electric cooker according to a second embodiment of the present invention;

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

<First Embodiment>

2 to 4, the electric cooker 100 according to the first embodiment of the present invention includes an inner pot 400 in which food is accommodated, and an induction heating coil provided to cover the lower part of the inner pot 400 ( 321) is mounted thereon, and a hollow case 330 provided to cover the outer surface of the inner pot 400 and having hollow parts 330a and 330b formed therein.

The inner pot 400 is shaped like a container in which food is accommodated, and is composed of a bottom part 401, a side part 402, and a curved part 403 connecting the bottom part 401 and the side part 402, The open top of the inner pot 400 is opened and closed by a lid 200 hinged to one side of the main body 300 .

The main body 300 includes a main body case 301 formed to surround the outside of the hollow case 330 so that the inner pot 400 and the hollow case 330 can be accommodated therein, and the lower end of the main body case 301. It is connected to and includes a base cover 302 forming a lower body of the main body 300.

On the front side of the main body 300, a substrate unit 500 including a control unit including a display device for displaying a cooking state, a microcomputer for controlling the cooking state, and control buttons is provided.

The coil base 310 is provided with a temperature sensor 360 for sensing the temperature of the inner pot 400, and the control unit operates the induction heating coil 321 and the side heater 322 according to the detected temperature and manipulation of the control button. to regulate the temperature of

A cooling fan 340 is provided below the base unit 500 to generate cooling air by sucking outside air. The cooling wind generated by the cooling fan 340 flows to the substrate part 500 and the coil base 310 .

The coil base 310 is provided at the bottom of the inner pot 400 and surrounds the bottom part 401 and the lower part of the curved part 403 of the inner pot 400, and may be formed of a synthetic resin material. The central portion of the bottom of the coil base 310 protrudes upward, and a through portion 311 into which the temperature sensor 360 is inserted is formed at the protruding portion.

The coil base 310 includes a coil base support portion 310a bent downward at an edge to support the coil base 310 in the hollow case 330, and a coil base protruding downward from the bottom surface of the coil base 310. A plurality of coil base bosses 310b spaced apart along the circumference of the base 310 are formed.

The induction heating coil 321 is mounted on the lower surface of the coil base 310, and is wound around the center of the coil base 310 at a portion corresponding to the bottom portion 401 of the inner pot 400. (321a), a curved surface heating portion (321b) wound along the outer circumference of the coil base 310 at a portion corresponding to the curved portion (403) of the inner pot (400). The bottom heating part 321a and the curved surface heating part 321b may be made of coils wound in a spiral shape a plurality of times to form magnetic lines of force for induction heating of the inner pot 400 .

Separately from the induction heating coil 321, side heaters 322 and 323 that mainly generate heat during keeping warm are provided. The side heater parts 322 and 323 are provided to surround the outside of the side part 402 of the inner pot 400, and the side heater 322 that generates heat by supplying power and the side surface for mounting the side heater 322 It consists of a heater case (323).

The lower end of the side heater case 323 is seated on the first stepped portion 331b of the inner case 331, and the upper end of the side heater case 323 is seated on the inner pot to support the upper edge of the inner pot 400. It is supported on the lower part of the part 370.

The hollow case 330 is a cylindrical shape having hollow parts 330a and 330b having a larger diameter than the inner pot 400 and is provided to surround the outer side of the inner pot 400 .

The hollow case 330 may be configured to form one hollow portion between two cases, or may be configured to form two hollow portions between three cases, but in this embodiment, two hollow portions are formed between three cases. The configuration in which the hollow part is formed will be described.

The hollow case 330 includes an inner case 331 spaced apart from the outer surface of the inner pot 400, an outer case 333 forming hollow parts 330a and 330b between the inner case 331, It consists of an intermediate case 332 inserted into the hollow parts 330a and 330b to divide the hollow parts 330a and 330b into a first inner hollow part 330a and a first outer hollow part 330b.

The inner case 331 has a cylindrical shape with upper and lower portions open, and includes an upper portion 331c and a lower portion 331d of the inner case formed at the upper and lower ends of the inner case 331, the upper portion 331c of the inner case and the inner case 331c. An inner case body portion 331a formed between the case lower portion 331d, and a plurality of inner case body portions 331a formed in the inner case body portion 331a so that the diameter of the inner case body portion 331a increases from the bottom to the top. It consists of step portions 331b, 331e, and 331f. The inner case 331 may be formed of a synthetic resin material.

The inner case upper end 331c has a ∩-shaped cross section, and the outer case upper ends 333b and 333c are coupled to each other, and the inner case lower end 331d is supported by the outer case lower ends 333e and 333f.

The stepped portions 331b, 331e, and 331f are formed below the upper portion of the inner case 331c so that the lower ends of the side heaters 322 and 323 are seated on the upper portion of the inner case while going from the bottom to the top so that the inner case body portion 331a ) is bent outward to increase the diameter of the first stepped portion 331b having a stepped shape, and formed on the lower side of the first stepped portion 331b, so that the lower end of the coil base support portion 310a is at the upper portion of the inner surface. The second stepped portion 331e, which is bent outward to increase the diameter of the inner case body portion 331a from the bottom to the top so as to be seated, and the second stepped portion 331e and the lower portion 331d of the inner case ) formed between the inner case 331 and the inner surface of the inner case 331 and the coil base 310 to secure a wider separation space 306 from the bottom to the top so that the diameter of the inner case body portion 331a increases It is bent outward to form a stepped third step portion 331f.

Forming the first to third stepped portions 331b, 331e, and 331f as described above can improve the strength of the inner case 331 and prevent deformation.

On the other hand, FIG. 2(d) shows a case where the third step portion 331f is not formed, and in this case, the separation space 306-1 between the inner case 3310 and the coil base 3100 is narrow. Since it is formed, the curved surface heating part 3210b of the induction heating coil cannot be expanded in the direction of the arrow even when an output improvement is required, and there is a problem in that heat is trapped inside the separation space 306-1 and the cooling performance deteriorates.

On the other hand, when the third stepped portion 331f is formed, the number of turns of the induction heating coil 321 is increased by extending the curved surface heating portion 321b of the induction heating coil 321 in the direction of the arrow as shown in FIG. 2(b). By heating the inner pot 400 at a high temperature, cooking quality and energy efficiency can be improved. In addition, in order to prevent damage to the induction heating coil 321 due to heat generated by the induction heating coil 321 during cooking, the cooling performance can be improved by allowing heat to escape without being trapped inside the separation space 306 .

The intermediate case 332 has a cylindrical shape with upper and lower portions open so that the inner case 331 is inserted therein, and the upper and lower ends of the intermediate case 332b are formed at the upper and lower ends of the intermediate case 332 and the lower portion of the intermediate case ( 332c), and an intermediate case body portion 332a connecting the intermediate case upper portion 332b and the intermediate case lower portion 332c. The intermediate case 332 may be molded of a synthetic resin material.

In the intermediate case body portion 332a, a first inner hollow portion 330a between the inner case 331 and a first outer hollow portion 330b between the outer case 333 are formed, respectively, and the intermediate case In order to prevent deformation of 332, the inner case 331 and the outer case 333 may be bent to correspond to the shapes of the stepped shape.

The middle case upper end 332b is inserted into the ∩ shape of the inner case upper end 331c, and the upper bent portion bent outward from the upper end of the middle case upper end 332b is the inner case upper end 331c and the outer case upper end. It is interposed between the extension portions 333b, and the upper bent portion is supported by the outer case upper extension portion 333b to prevent the middle case 332 from sagging.

The middle case lower end 332c is inserted into the outer case lower extension 333d having a ∪ shape, and the lower end is supported by the outer case lower extension 333d. In this case, the middle case 332 and the inner case are formed by forming a lower bent portion bent inward at the lower portion 332c of the middle case, and bringing the inner end of the lower bent portion into contact with the inner surface of the lower extension portion 333d of the outer case. (331) and between the middle case 332 and the outer case 333 are separated by a predetermined distance to form the first inner hollow part 330a and the first outer hollow part 330b up to the lower end of the hollow case 330. can make it

The outer case 333 has a cylindrical shape with upper and lower portions open so that the intermediate case 332 is inserted therein, and the outer case upper ends 333b and 333c formed at the upper and lower ends of the outer case 333 and the outer case The lower part 333d, 333e, 333f, the outer case body part 333a connecting the upper part 333b, 333c and the lower part 333d, 333e, 333f of the outer case, and the lower part of the induction heating coil 310 It consists of a coil support part 333h for supporting. The outer case 333 may be formed of a synthetic resin material.

The outer case upper end portions 333b and 333c are the outer case upper end extension portion 333b inserted into the ∩ shape of the inner case upper end portion 331c, extending outward from the outer case upper end extension portion 333b and then upward. It consists of a bent outer case top seating portion (333c).

The ∩-shaped outer end of the inner case upper end 331c is inserted into the concave groove surrounded by the outer case upper end extension 333b and the outer case upper seating part 333c, so that the inner case upper end 331c and the outer case The upper ends 333b and 333c are coupled.

In the above, the case where the upper end 331c of the inner case 331 is formed in a ∩ shape has been described, but the upper end of the outer case 333 is formed in a ∩ shape and the upper end of the inner case 331 is formed in a ∩ shape. It is also possible to configure a structure coupled to the inner end of the ∩ shape.

The outer case lower portions 333d, 333e, and 333f extend downward from the outer case body portion 333a and have a ∪-shaped cross section, and the outer case lower extension portion 333d It consists of a horizontal support portion 333e bent radially inward of the inner pot 400 at the inner end of the inner pot 400 and formed in a horizontal direction, and a vertical hanging portion 333f bent upward at the inner end of the horizontal support portion 333e.

The lower part 331d of the inner case is supported on the upper surface of the horizontal support part 333e, and the lower part 331d of the inner case is caught by the vertical hanging part 333f, so that the lower part of the inner case 331 and the outer case 333 is combined

An intermediate bent portion 333n is formed in the middle of the outer case body portion 333a so that the diameter of the outer case body portion 333a increases from the bottom to the top. Due to the formation of the intermediate bent portion 333n, the volume of the hollow portions 330a and 330b may be increased.

The inner case 331, the outer case 333, and the middle case 332 having the above configuration are manufactured, respectively, and after inserting the middle case 332 into the outer case 333, the inside of the middle case 332 When assembled in a stacking manner by inserting the inner case 331, the hollow case 330 having hollow parts 330a and 330b formed therein can be easily manufactured.

In addition, the hollow case 330 having hollow parts 330a and 330b formed therein surrounds the outer side of the inner pot 400, thereby blocking heat dissipation from the inner pot 400 to the outside, thereby improving the insulation effect.

Meanwhile, a lower space 305 is formed under the coil base 310 , and the base cover 302 surrounds an outer circumference of the lower space 305 . The outer case lower extension portion 333d is formed in a ∪ shape and hollow parts 330a and 330b are formed therein, and the outer case lower extension portion 333d is spaced apart from the upper surface of the base cover 302, Hollow parts 330a and 330b are provided to surround a part of the lower space 305 .

According to this configuration, when cooking, the outer case lower extension 333d is spaced apart from the base cover 302 to maintain the cooling function of the induction heating coil 321, and when keeping warm, the outer case lower extension 333d ) has an effect of minimizing heat dissipation to the outside by the structure extending to the lower space 305.

In addition, the outer side of the side heater parts 322 and 323 is surrounded by the upper part of the hollow case 330, and as shown in FIGS. 2(b) and (c), the upper part of the inner case 331 in the hollow case 330 The silver body case 301 is in close contact with the bottom surface of the case support part 303 integrally formed therein. Therefore, it is possible to block heat generated from the side heater units 322 and 323 from being radiated to the outside, so that the insulation effect can be further improved.

In the above embodiment, the case where the inner case 331, the middle case 332, and the outer case 333 are made of synthetic resin has been described, but the middle case 332 can also be made of a metal material.

In order to heat the inner pot 400 during keeping warm, the induction heating coil 321 operates intermittently. Some of the induced current generated in the induction heating coil 321 heats the inner pot 400, and the remaining part is induction. The current induction heats the middle case 332 made of metal to heat the air inside the hollow parts 330a and 330b. In this case, since the air in the hollow parts 330a and 330b sealed by the inner case 331 and the outer case 333 does not escape to the outside, heat dissipation from the inner pot 400 to the outside can be reliably blocked, thereby insulating the heat. effect can be improved.

Furthermore, when the induction heating coil 321 is operated for strong heating of the inner pot 400 during cooking, electromagnetic waves are generated. can

In addition, in order to improve the heat insulating effect, it may be configured to fill the hollow parts 330a and 330b with a heat insulating material or a sound absorbing material instead of the middle case 332 . In this case, it may be configured by filling a heat insulating material or sound absorbing material having a thickness greater than the largest part of the gap between the outer surface of the inner case 331 and the inner surface of the outer case 333. In this configuration, by minimizing empty space inside the hollows 330a and 330b, it is possible to prevent heat from being radiated to the outside due to convection in the empty space, thereby maximizing the insulation effect.

As shown in FIGS. 3 and 4 , the coil support 333h radially connects the donut-shaped central support 333-1h and the central support 333-1h and the lower end 333e of the outer case. It consists of a plurality of connection support parts (333-2h) for.

Conventionally, the coil holder 13 is provided to support the lower part of the induction heating coil 12, but in the case of the present invention, the induction heating coil 321 is supported by the coil support part 333h integrally formed with the outer case 333. Therefore, since the same configuration as the coil holder 13 is unnecessary, the configuration is simplified.

In addition, a coil base boss seating portion 333i is formed concave downward in the coil support portion 333h, in which the coil base boss 310b protruding downward from the coil base 310 is inserted and seated therein. When the coil base boss 310b is fastened with the fastening member 380 in a state of being inserted into the coil base boss mounting portion 333i, the coil base 310 and the outer case 333 are integrally coupled.

In a state in which the inner case 331, the middle case 332, and the outer case 333 configured as described above are coupled in a stacked manner, the coil base support portion 310a of the coil base 310 supports the inner case 331 After pressing the second stepped portion 331e of ) and then integrally combining the coil base boss 310b of the coil base 310 and the coil base boss seating portion 333i by the fastening member 380, the inner side It is possible to seal the hollow parts 330a and 330b of the hollow case 330 by further contacting each other at the upper and lower ends of the case 331 and the outer case 333 .

4 (a), (e), (f), the upper outer surface of the outer case 333 has a ⊃-shaped first wire alignment part 333g protruding outward and a ∩-shaped second A wire alignment unit 333m is formed. The wires connected to the electric cooker 100 pass through the ⊃-shaped inside of the first wire aligning part 333g and the ∩-shaped inside of the second wire aligning part 333m, so that the wires can be simply arranged.

Referring to FIGS. 3(b) and 4(a) , a plurality of outer case fastening portions 333j protruding outward are formed on the outer circumferential surface of the outer case 333 . A body case support boss 307 protruding downward from the body case 301 is seated on the upper part of the outer case fastening part 333j, and the lower part of the outer case fastening part 333j protrudes upward from the base cover 302. In a state supported by the base cover support boss 308, the fastening member 381 passes through the base cover support boss 308 and the outer case fastening part 333j and then is fastened to the inside of the body case support boss 307. The hollow case 330 is coupled to the inside of the main body 300 .

4(a), (c), (d), and (g), the lower end of the inner case 331 has a plurality of inner case protrusions 331g protruding inward along the inner circumference of the inner case 331. In the outer case 333, a plurality of cutout grooves 333k are formed along the circumference of the vertical locking portion 333f at a position corresponding to the inner case protruding portion 331g. FIG. 4(d) is a view of FIG. 4(c) viewed from the bottom and shows a state in which the protruding portion 331g is inserted into the incision groove 333k.

When the middle case 332 and the inner case 331 are inserted into the outer case 333, the protruding part 331g is inserted into the incision groove 333k, and the vertical locking parts 333f on both sides of the incision groove 333k As a result, when the inner case 331 rotates, the protruding portion 331g is caught. According to this structure, when assembling the inner case 331 and the outer case 333, the protruding portion 331g and the cutout 333k correspond to each other so that the assembly direction designation and guide function can be performed.

Referring to FIG. 2(c) , a plurality of inner case seating guides 304 protruding downward from the case support portion 303 formed in the body case 301 are formed along the circumference of the body case 301 . In the hollow case 330, the outer surface of the inner case upper end 331c is supported by the inner surface of the inner case seating guide 304. Due to this, the hollow case 330 is prevented from moving in the horizontal direction and can be accurately assembled at a set position.

Referring to FIGS. 2(b) and 4(a) , a side heater insertion guide 331i protrudes inward from the inner surface of the inner case 331 on the top of the first stepped portion 331b of the inner case 331. ) Is formed in plurality along the inner circumference of the inner case 331. The side heater insertion guide 331i is composed of a vertical portion 331-1i erected vertically and an inclined portion 331-2i inclined outward from an upper end of the vertical portion 331-1i. When the side heater parts 322 and 323 are inserted into the inner case 331, the lower end of the side heater case 323 is guided by the inclined part 331-2i and then placed inside the vertical part 331-1i. Since it is seated on the first step part 331b, it can be accurately assembled at the set position.

4 (a) and (b), when the inner pot 400 is inserted into the inner case 331 of the hollow case 330, the inner pot guide 334 for guiding the outer surface of the inner pot 400 A plurality of are provided in the first stepped portion 331b formed along the inner circumference of the inner case 331 .

The inner pot guide 334 is formed in a guide portion 334a protruding inward from the inner surface of the inner case 331 and an inner pot guide seating groove 331h formed concave downward in the first stepped portion 331b. It consists of an insertion portion 334b to be inserted and a support portion 334c protruding upward from the outer end of the inner pot guide 334 so as to be supported on the inner surface of the inner case 331 . The inner pot guide 334 is preferably made of a soft material having elasticity such as silicon.

When the inner pot 400 is moved downward into the main body 300 in a state where the plurality of inner pot guides 334 are seated on the first stepped part 331b, the inner pot is attached to the guide part 334a of the inner pot guide 334. Since the outer surface of the 400 moves downward in a contacted state, the inner pot 400 can be seated at the center of the hollow case 330 without being deflected inside the hollow case 330 . In this case, the guide portion 334a is elastically deformed due to the inner pot guide 334 made of a soft material.

According to the present invention having such a configuration, the hollow case 330 surrounds the lower space 305 formed on the outside of the induction heating coil 321 and the side heaters 322 and 323 and the lower part of the coil base 310. Heat loss can be minimized. In addition, the middle case 332 is provided inside the hollow case 330 to form double hollow parts 330a and 330b, thereby improving the heat insulating effect. In addition, the plurality of cases 331 , 332 , 333 constituting the hollow case 330 are combined in a stacked manner, but the upper and lower ends are in close contact to simplify the manufacturing process and easily form the inside of the hollow case 330 as an airtight space. can do.

<Second Embodiment>

Referring to FIG. 5, the electric cooker 100-1 according to the second embodiment of the present invention includes a hollow case 330-1 composed of a coil base 310-1 and two cases 332-1 and 333-1. ) is used to form the double hollow parts 330-1a and 330-1b, and there is a difference from the first embodiment, and the rest of the configuration is the same.

The hollow case 330-1 includes an intermediate case 332-1 forming a second inner hollow portion 330-1a sealed between the coil base 310-1 and the intermediate case 332-1. ) It consists of an outer case 333-1 forming a second outer hollow portion 330-1b sealed between.

The coil base 310-1 includes a coil base support portion 310-1b protruding downward from the coil base body portion 310-1a, and a coil base upper end portion 310-1 formed at an upper end of the coil base 310-1. 1c), the coil base upper body portion 310-1e extending downward from the inner end of the coil base upper portion 310-1c, the coil base body portion 310-1a and the coil base upper body portion 310 -1e) It consists of a stepped coil base portion 310-1d that is connected between the coil bases and is formed stepwise so that the coil base upper body portion 310-1e has a larger diameter than the coil base body portion 310-1a. . The coil base 310-1 may be formed of a synthetic resin material.

The coil base upper end 310-1c has a ∩-shaped cross section, and the outer case upper ends 333-1b and 333-1c are coupled to each other, and the coil base support 310-1b is connected to the outer case 333-1. It is supported by the horizontal support part 333-1e.

The coil base stepped portion 310-1d is formed on the lower side of the coil base upper end portion 310-1c and is bent outward so that the lower ends of the side heater portions 322 and 323 are seated on the upper inner surface to have a stepped shape. there is.

The middle case 332-1 has a cylindrical shape with upper and lower ends open so that the coil base 310-1 is inserted therein, and has upper and lower ends of the middle case 332-1b and a lower end of the middle case. (332-1c), and an intermediate case body portion (332-1a) connecting the intermediate case upper portion (332-1b) and the intermediate case lower portion (332-1c). The intermediate case 332-1 may be molded of a synthetic resin material.

The middle case upper end 332-1b is inserted into the ∩ shape of the coil base upper end 310-1c, and the upper bent portion bent outward from the upper end of the middle case upper end 332-1b is the coil base upper end ( 310-1c) and the outer case upper extension portion 333-1b, the upper bent portion is supported by the outer case upper extension portion 333-1b to prevent the middle case 332-1 from sagging. .

The middle case lower end 332-1c is inserted into the ∪-shaped outer case lower extension 333-1d, and the lower end is supported by the outer case lower extension 333-1d. In this case, a lower bent portion bent inwardly is formed at the lower end portion 332-1c of the middle case, and the inner end of the lower bent portion is brought into contact with the inner surface of the lower extension portion 333-1d of the outer case, so that the middle case 332 -1) and the coil base 310-1, and between the middle case 332-1 and the outer case 333-1 by a predetermined interval, respectively, between the second inner hollow part 330-1a and the second outer middle case 330-1a. The hole 330-1b may be formed up to the lower end of the hollow case 330-1.

The outer case 333-1 has a cylindrical shape with an open top so that the intermediate case 332-1 is inserted therein, and the outer case upper end 333 is formed at the upper and lower ends of the outer case 333-1. -1b, 333-1c) and the outer case lower parts 333-1d, 333-1e, 333-1f, the outer case upper parts 333-1b, 333-1c and the outer case lower parts 333-1d, 333-1e , 333-1f) is composed of an outer case body portion 333-1a connecting between them. The outer case 333-1 may be formed of a synthetic resin material.

The outer case upper ends 333-1b and 333-1c include an outer case upper extension portion 333-1b inserted into the ∩ shape of the coil base upper portion 310-1c, and the outer case upper extension portion 333-1c. It consists of an outer case top seating portion 333-1c that extends outward from 1b) and then bends upward.

The ∩-shaped outer end of the upper end of the coil base 310-1c is inserted into the concave groove surrounded by the upper extension part 333-1b and the upper seating part 333-1c, and the upper end of the coil base 310-1c is inserted. ) and the outer case upper ends 333-1b and 333-1c are coupled.

The outer case lower portions 333-1d, 333-1e, and 333-1f extend downward from the outer case body portion 333-1a and have a ∪-shaped cross section. The outer case lower extension portion 333-1d , a horizontal support portion 333-1e formed in a horizontal direction by bending radially inward of the inner pot 400 at the inner end of the lower extension portion 333-1d of the outer case, and an inner end of the horizontal support portion 333-1e. It consists of a vertical hanging portion (333-1f) bent upward in the.

The coil base support part 310-1b is supported on the upper surface of the horizontal support part 333-1e, and the coil base support part 310-1b is caught on the vertical hanging part 333-1f, so that the coil base 310-1b 1) and the lower end of the outer case 333-1 are coupled.

In the above, the case where the upper end 310-1c of the coil base 310-1 is formed in a ∩ shape has been described, but the upper end of the outer case 333-1 is formed in a ∩ shape and the It is also possible to configure a structure in which the upper end is coupled to the inner end of the ∩ shape.

According to this structure, the double hollow parts 330-1a and 330-1b are formed using the hollow case 330-1 composed of the coil base 310-1 and the two cases 332-1 and 333-1. Therefore, the structure is simplified compared to the first embodiment.

As described above, the present invention has been described in detail with preferred embodiments, but the present invention is not limited to the above-described embodiments, and various modifications are made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible to carry out by doing, and this also belongs to the present invention.

100,100-1: electric cooker 200: lid
300: body 301: body case
302: base cover 303: case support
305: lower space 306: separation space
310: coil base 310a: coil base support
310b: coil base boss 311: penetrating portion
321: induction heating coil 322: side heater
323: side heater case 330: hollow case
330a: first inner hollow part 330b: first outer hollow part
331: inner case 331a: inner case body
331b: first step portion 331c: upper portion of the inner case
331d: lower part of the inner case 331e: second step part
331f: third step portion 331g: inner case protrusion
331h: Inner pot guide seating groove 331i: Side heater insertion guide
332,332-1: Intermediate case 332a, 332-1a: Intermediate case body
332b, 332-1b: upper part of intermediate case 332c, 332-1c: lower part of intermediate case
333,333-1: outer case 333a, 333-1a: outer case body
333b, 333-1b: upper extension of the outer case
333c, 333-1c: upper part of outer case
333d, 333-1d: outer case lower extension
333e, 333-1e: horizontal support 333f, 333-1f: vertical hanging
333g: first wire alignment part 333h: coil support part
333i: coil base boss seating part 333j: outer case fastening part
333k: incision groove 333m: second wire alignment part
334: inner pot guide 334a: guide part
340: cooling fan 360: temperature sensor
370: inner pot seating part 380, 381: fastening member
310-1: coil base 310-1a: coil base body
310-1b: Coil base support part 310-1c: Coil base upper part
310-1d: Coil base stepped portion 310-1e: Coil base upper body portion
400: inner pot 401: bottom
402: side part 403: curved part
500: board part

Claims (28)

An inner pot in which food is accommodated;
a coil base provided to surround a lower portion of the inner pot and to which an induction heating coil is mounted;
a hollow case provided to surround an outer surface of the inner pot and having a hollow portion formed therein;
including,
The hollow case includes an inner case surrounding the outer side of the inner pot, an outer case forming the hollow portion between the inner case and the middle case for dividing the hollow portion into a first inner hollow portion and a first outer hollow portion. containing electric cooker delete delete According to claim 1,
The inner case, the middle case, and the outer case are electric cookers, characterized in that made of synthetic resin material According to claim 1,
The middle case is an electric cooker, characterized in that made of a metal material According to claim 1,
Electric cooker characterized in that the hollow portion is filled with a heat insulating material or a sound absorbing material According to claim 1,
The electric cooker characterized in that the upper and lower ends of the inner case are laminated on the upper and lower ends of the outer case, respectively, and the coil base support formed at the edge of the coil base is laminated to press the inner case. According to claim 1,
The electric cooker characterized in that the upper end of the inner case and the upper end of the outer case are formed in a ∩ shape, and the other upper end supports one end of the ∩ shape. According to claim 1,
At the lower end of the outer case, a horizontal support part bent inwardly in the radial direction of the inner pot and formed in a horizontal direction and a vertical hanging part bent upward from the inner end of the horizontal support part are formed, and the lower end of the inner case is supported by the horizontal support part. Electric cooker, characterized in that at the same time caught in the vertical hanging part According to claim 9,
A plurality of inner case protrusions protruding inward are formed at the lower end of the inner case, and the inner case protrusions are inserted into incision grooves formed along the circumference of the vertical hanging part, so that the inner case protrusions are perpendicular to both sides of the incision grooves. Electric cooker, characterized in that caught by the hooking portion According to claim 1,
Between the inner pot and the inner case, a side heater part is provided to surround the side surface of the inner pot and generates heat during keeping warm, and the upper part of the hollow case surrounds the outside of the side heater part. Electric cooker, characterized in that According to claim 11,
The electric cooker, characterized in that the lower end of the side heater part is seated on a first step part formed stepwise so that the diameter increases toward the top of the inner case, and the upper end is supported by the inner pot seating part for supporting the inner pot. According to claim 1,
The electric cooker characterized in that the edge of the coil base is seated on the second stepped portion of the stepped shape so that the diameter of the body of the inner case increases toward the top. According to claim 1,
The electric cooker characterized in that the third stepped portion is formed in a stepped shape so that the diameter of the body of the inner case increases toward the top to secure a spaced space between the coil base and the coil base. According to claim 1,
A base cover surrounding a lower portion of the coil base is provided to form a lower space between the coil base and the coil base.
The electric cooker, characterized in that the lower part of the hollow case is formed to at least partially surround the outside of the lower space According to claim 15,
An electric cooker characterized in that a ∪ shape surrounding at least a part of the outer side of the lower space is formed at the lower end of the hollow case. According to claim 1,
When the inner pot is inserted into the hollow case, a plurality of inner pot guides for guiding the outer surface of the inner pot are provided so as to protrude inward from the inner surface of the hollow case. According to claim 17,
An electric cooker characterized in that a stepped first step portion is formed on the inner surface of the hollow case, and an insertion portion formed on the bottom surface of the inner pot guide is inserted into the inner pot guide seating groove formed on the first step portion. According to claim 17,
The inner pot guide is an electric cooker, characterized in that made of silicon material According to claim 1,
An electric cooker characterized in that a main body case surrounding the outside of the hollow case is provided, and an upper end of the hollow case is in contact with a case support part of the main body case to prevent heat dissipation. According to claim 20,
The outer surface of the top of the hollow case protrudes downward from the main body case and is supported on the inner surface of a plurality of inner case mounting guides formed along the circumference of the main body case. According to claim 1,
An electric cooker characterized in that a coil support portion is formed extending inward from the lower end of the outer case to support the lower portion of the induction heating coil. According to claim 22,
The electric cooker, characterized in that the coil base support portion formed on the edge of the coil base is seated to press the inner case, and the coil base and the coil support portion are integrally coupled by a fastening member. According to claim 23,
The coil base boss and the coil base boss seating part are integrally coupled by the fastening member in a state in which the coil base boss protruding downward from the coil base is inserted into the coil base boss seating part formed concave downward in the coil support part. electric cooker characterized in that An inner pot in which food is accommodated;
a coil base provided to surround a lower portion of the inner pot and to which an induction heating coil is mounted;
a hollow case provided to surround an outer surface of the inner pot and having a hollow portion formed therein;
including,
The hollow case is an electric cooker composed of an intermediate case forming a second inner hollow portion sealed between the coil base and an outer case forming a sealed second outer hollow portion between the intermediate case and the intermediate case. According to claim 25,
At the lower end of the outer case, a horizontal support portion bent in a radially inward direction of the inner pot and formed in a horizontal direction and a vertical hanging portion bent upward at an inner end of the horizontal support portion are formed;
The coil base support portion protruding downward from the coil base is supported by the horizontal support portion and at the same time caught in the vertical hanging portion of the electric cooker. According to claim 25,
An upper end of either of the upper end of the coil base and the upper end of the outer case is formed in a ∩ shape, and the upper end of the other side supports the outer end of the ∩ shape. According to claim 25,
Between the inner pot and the coil base, a side heater part is provided to surround the side surface of the inner pot and generates heat during keeping warm, and the lower end of the side heater part is a stepped part of the coil base that has a diameter increasing from the coil base to the top part. Seated on, the upper end is an electric cooker, characterized in that supported by the inner pot seating portion for supporting the inner pot

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