KR20190004054A - Electric Rice Cooker And Manufacturing Method Thereof - Google Patents

Abstract

The present invention relates to an electric rice cooker including a planar heating element. More specifically, the electric rice cooker includes: a body storing an inner pot; a lid which is hinged to a side of the body to be opened or closed; a top plate which is arranged in the lid; a planar heating element which is arranged on a surface of the top plate and is made of a film having a planar heating element pattern printed thereon; a terminal unit formed on the planar heating element; connection terminals (151, 161) arranged on a surface of the terminal unit; wires connected to an end of the connection terminals; tubes which are fitted to the wires to cover the connection parts of the connection terminals (151, 161) and the wires; a silicone coated on the terminal unit, connection terminals (151, 161), and tubes; and a first polyimide (PI) tape which is attached to the terminal unit, tubes, and silicone. The tubes are partially arranged on the upper part of the planar heating element patterns while the PI tape is attached to the part of the tubes arranged on the upper part of the planar heating element patterns and a side part of the planar heating element having the above-mentioned part of the tubes arranged thereon. When the planar heating element is applied to the top plate as a top heater, the electric rice cooker can secure greater reliability when executing a voltage durability test, which is one of the most critical issues related to the performance of an electrical apparatus.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric rice cooker,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electromagnetic rice cooker to which a planar heating element is applied, more specifically, to a configuration in which a terminal portion of a planar heating element for a top plate is changed, To thereby ensure stability of the withstand voltage and a method of manufacturing the same.

Generally, an electric rice cooker is a device capable of selectively performing a cooking function for cooking rice and a keeping function for keeping the cooked rice at a predetermined temperature.

The inner rice cooker is provided with a lid on the upper part of which a steam outlet hole is formed to be openable and closable. An inner pot is detachably installed in the inner portion of the main body, and an inner pot lid is separately provided to cover the inner pot. An induction heating method or a heat plate type heater is provided which is capable of transferring heat to a cooking object contained in an inner pot, that is, rice, grain, or other food material.

The electric pressure cooker is further provided with a locking means for sealing the inside of the main body and a steam discharge valve (solenoid valve) for controlling the discharge of steam inside the main body.

FIG. 1 attached to Patent Document No. 2004-0081909 (hereinafter referred to as "Patent Document 1") shows an electromagnetic cooker using a conventional induction heating principle.

An electromagnetic cooker using a conventional induction heating principle is largely composed of a main body of the product and a cover for opening and closing the main body.

An inner pot is detachably installed in the interior of the main body, and a working coil for induction heating the inner pot is provided on the outer peripheral surface of the inner pot.

A coil base is placed between the working coil and the inner pot to support the working coil.

In order to prevent the heat of the induction-heated inner pot from being released to the outside, the coil base is mainly made of a PET-based resin injection molded article having good heat resistance.

A ring case is attached to the upper side surface of the inner pot, and a linear heater coil is provided on the outer surface of the ring case to heat the ring case while receiving power.

The heater coil is also located inside the cover.

The heater coils operate mainly at the time of keeping warm after the completion of cooking, and sometimes they are used as auxiliary heat sources when heating.

This will be described in more detail as follows.

The cover includes an inner cover and an outer cover, and a top plate is coupled to a lower surface of the inner cover.

A clean plate is attached to the bottom surface of the top plate.

On the other hand, a clean cover detachably attached to the cover is provided to seal the top of the inner pot.

A linear heater coil is provided on the top surface of the top plate to serve as a top heater.

Linear heater coils are wrapped with PVC or silicone or Teflon tube and are stable to withstand voltage and are flexible because they are linear and have been used in top heaters for side heating of inner pot and heating of cover (lid).

On the other hand, the linear heater coil has a problem that uniform heat transfer is not performed due to the characteristic of the linear structure, the electric consumption efficiency is low, and the heating efficiency is low due to the long heater length.

Accordingly, the applicant of the present invention has proposed an electromagnetic cooker employing a planar heating element in order to solve the problem of a conventional linear heater coil.

In the case of an electromagnetic rice cooker employing a surface heating element on the top surface of the top plate proposed by the applicant of the present invention, uniform heat transfer is possible and high electric consumption efficiency can be achieved.

At this time, the surface heating element is formed by placing input and output terminals on a polyimide (PI) film having a predetermined width, connecting wires to the input and output terminals, inserting a silicon tube, applying silicone to integrate them, (PI) tape was wound to form a terminal portion.

This surface heat generating element is subjected to the withstand voltage test by bringing the withstand voltage bar to the silicon tube connected to the terminal portion. However, when the withstand voltage test was performed, NG was found, and the surface heating element was found to be weaker than the conventional linear heater.

More specifically, unlike a linear heater, the surface heating element is protected by a silicon tube and a polyimide (PI) tape, so that when the silicone is applied or a polyimide (PI) tape process is defective, Was not wrapped around the polyimide (PI) tape and NG occurred. In other words, the structure of the terminal portion of the surface heating element is found to be weak, and the necessity of the structural change related thereto is raised.

Since the surface heating element for the top heater adheres directly to the top plate, the back surface of the terminal portion, that is, the back surface thereof, has been coated with silicon in order to cut off the current transmitted from the top plate to the surface heating element during the withstand voltage test. However, when the silicone is coated on the front and back sides of the terminal portion, the coated silicon flows in one direction, resulting in NG when a single product is tested, thus necessitating a structural change related thereto.

Japanese Patent Application Laid-Open No. 10-2004-0081909 Patent Registration No. 10-471452

The present invention relates to an electromagnetic cooker to which a surface heating element is applied, and is intended to provide an electromagnetic cooker in which the stability with respect to the withstand voltage of the surface heating element for a top plate is secured.

It is another object of the present invention to provide an electromagnetic cooker in which current is not transmitted between a top plate and a surface heating element for a top plate.

In order to achieve the above object, the present invention provides a cooking apparatus comprising: a main body for housing an inner pot; A cover hinged to one side of the main body so as to be opened and closed; A top plate positioned within the lid; A planar heating element provided on one surface of the top plate and made of a film on which a planar heating element pattern is printed; A terminal portion formed on the planar heating element; A first polyimide (PI) tape attached to one surface of the terminal portion; And a second polyimide (PI) tape having a portion where at least the terminal portion is located and a second polyimide (PI) tape to which both surfaces are respectively attached to the other surface of the terminal portion.

Further, the present invention provides a connector comprising: a connection terminal disposed on one surface of the terminal portion; A wire connected to an end of the connection terminal; The first polyimide (PI) tape is attached at a length of at least 7 mm from the end of the tube to the length of the tube, .

In addition, the present invention is characterized in that a second polyimide (PI) tape (hereinafter referred to as " PI tape ") is provided on a portion of a top plate positioned inside the lid, which is hinged to one side of the main body, ; Attaching the planar heating element to one surface of the top plate so that the other surface of the terminal portion is attached to one surface of the second polyimide (PI) tape; And attaching a first polyimide (PI) tape to an upper portion of the terminal portion.

Further, in the present invention, the step of attaching the surface heat emission element may include connecting a connection terminal having a wire and a tube coupled to the terminal portion, connecting the terminal portion, the connection terminal and the surface heat emission body, And the first polyimide (PI) tape attaching step is characterized in that the first polyimide (PI) tape is attached at a length of at least 7 mm in the longitudinal direction from the end of the tube .

The present invention has the following effects.

In the present invention, the tube extends from the connection portion of the connection terminal and the wire to a position farther in the longitudinal direction. Further, since the first polyimide (PI) tape is attached not only to the terminal portion and the connection terminal, but also to the position farther in the longitudinal direction from the connection portion between the wire and the connection terminal in the tube, the dielectric constant of the surface heat emission element is secured, .

Further, in the rice cooker of the present invention, the electric current can be cut off between the top plate and the terminal portion of the surface heat emission element without applying silicone, ensuring the withstand voltage stability of the surface heat emission element.

In addition, the electromagnetic cooker of the present invention does not require a silicon application step, thereby improving the manufacturing process of the electromagnetic cooker.

1 is a plan view of a top plate in an electromagnetic cooker of the present invention
2 is a plan view of the surface heating element terminal portion in the electromagnetic cooker of the present invention
3 is a sectional view taken along line BB 'of FIG. 2
4 is a plan view of the top plate before the surface heating element is attached
5 is a flowchart
6 is a conceptual view of the electromagnetic cooker of the present invention
7 is an exploded perspective view of the rice cooker of the present invention,

The same components as those of the conventional art will be described below with reference to the related art, and a detailed description thereof will be omitted.

6 and 7, the electromagnetic cooker 10 of the present invention includes a main body 30 for housing the inner pot 20.

And a lid 40 hinged to one side of the body 30 to be opened and closed.

The lid 40 hingedly connected to one side of the main body 30 and openably and closably includes an inner cover 50 and an outer cover (not shown).

A top plate 60 is positioned on the lower surface of the inner cover 50. The top plate 60 is located inside the lid 40.

More specifically, the top plate 60 is fixed to and joined to the inner cover 50 by bolts, screws, or the like.

================================================== ====================

Hereinafter, a preferred embodiment of the electromagnetic cooker 10 of the present invention will be described based on FIGS. 1 to 4, 6 and 7.

The electromagnetic rice cooker 10 of this embodiment is provided on one surface 61 of a top plate 60 and includes an area heating element 100 composed of a film 101 on which an area heating element pattern 110 is printed.

The planar heating element 100 is fixed so as to be in contact with one surface 61 of the top plate 60.

The electromagnetic cooker 10 according to the present invention includes a terminal portion 120 formed on the surface heating element 100, connection terminals 151 and 161 disposed on one surface of the terminal portion 120, The silicon 250 and the tubes 170 and 180 are coated on the wires 150 and 160 and the tubes 170 and 180 so as to cover the connection portions of the connection terminals 151 and 161 and the wires 150 and 160, And a first polyimide (PI) tape 200 attached to one surface of the terminal unit 120.

In this embodiment, tubes 170 and 180 refer to silicon tubes.

In the electromagnetic cooker 10 of the present invention, a part of the tubes 170 and 180 is disposed on the upper surface of the planar heating element pattern 110, and the first polyimide (PI) tape 200 is disposed on the upper surface of the planar heating element pattern And the side portions of the portion where the tubes 170 and 180 are disposed on the upper portion of the planar heating element 100 are attached.

Meanwhile, the electromagnetic cooker 10 of the present invention is formed such that the lengths of the tubes 170 and 180 fitted to the wires 150 and 160 are longer than those of the conventional ones.

The first rice bran 10 is attached to the tubes 170 and 180 with a first polyimide (PI) tape 200. The first polyimide (PI) tape 200 is connected to the tubes 170 and 180 from the connection terminals 151 and 161, The first polyimide (PI) tape 200 is attached by a length of at least 7 mm in the longitudinal direction from the end of the tubes 170 and 180 so as to surround the tubes 170 and 180 by a length of at least 7 mm in the longitudinal direction of the tubes 170 and 180. That is, the first polyimide (PI) tape 200 is attached by a length of at least 7 mm, or at least 7 mm, in the longitudinal direction from the ends of the tubes 170 and 180. Thus, the insulation distance of the tubes 170 and 180 is secured.

More specifically, it is preferable that the first polyimide (PI) tape 200 is attached so as to cover the entirety of the silicon 250, the entire surface of the terminal portion 120, and the terminal portion 120 among the surface heat emission elements 100. In this case, the first polyimide (PI) tape 200 is attached so as to cover the outer surfaces of the tubes 170 and 180 as much as possible, and the tubes 170 and 180 of the planar heating element 100 are formed in such a manner that there is no space between the tubes 170 and 180 and the planar heating element 100 To be attached to both sides.

As described above, the present invention is such that the tubes 170 and 180 extend in the longitudinal direction from the connecting portions of the connection terminals 151 and 161 and the wires 150 and 160, respectively. The present invention is also applicable to a first polyimide (PI) tape 200 (not shown) extending from the connecting portion of the wires 150 and 160 and the connecting terminals 151 and 161 of the tubes 170 and 180, So that the stability of the withstand voltage of the planar heating element 100 is ensured.

As a result, NG is not generated even if the withstand voltage S is applied to the tubes 170 and 180 and the withstand voltage test is performed as shown in Fig.

The electromagnetic rice cooker 10 according to the present invention includes a top plate 60 and a top plate 60. The top plate 60 includes at least a terminal portion 120 and a second polyimide PI ) Tape (300).

The second polyimide (PI) tape 300 is attached to a position where the terminal portion 120 of the planar heating element 100 is to be mounted on one surface 61 of the top plate 60, and a second polyimide (PI) The terminal portion 120 of the planar heating element 100 is positioned on one side of the planar heating element 100. Therefore, the electromagnetic cooker 10 of the present invention can prevent the electric current from being interrupted between the top plate 60 and the surface heating element 100 even if silicon is not applied on the surface 61 of the top plate 60, The stability is ensured, and the step of applying silicon is not required, and the manufacturing process of the rice cooker 10 is improved.

More specifically, in this embodiment, unlike the prior art, silicon is not applied to one surface 61 of the top plate 60, so that one surface 61 of the top plate 60 and the other surfaces of the surface heating element 100 are in contact with each other. That is, silicon is not applied between the other surface of the terminal portion 120 and one surface 61 of the top plate 60 among the surface heating elements 100 contacting the one surface 61 of the top plate 60.

The size of the second polyimide (PI) tape 300 is larger than the area of the terminal portion 120 so that even if a manufacturing error occurs in the terminal portion 120 or the second polyimide (PI) tape 300, It is preferable that a second polyimide (PI) tape 300 is attached to all portions of the first polyimide film 120.

============================ Surface heating element ===================== ========

Hereinafter, the specific shape and structure of the planar heating element 100 will be described.

The planar heating element 100 comprises a polyimide (PI) film 101.

An area heating element pattern 110 is printed on the film 101 constituting the area heating element 100.

The planar heating element pattern 110 means a pattern made of a resistance heating element that generates heat upon power application. The planar heating element pattern 110 may be a single element metal thin film such as Fe, Al, or Cu or an alloy thin film such as an iron system (Fe-X), iron system (Fe-Cr), or FeCrAl. The material is not limited thereto.

In this embodiment, one surface 61 of the surface heating element 100 and one surface 61 of the top plate 60 are coated with one surface and the other surface so that the surface heating element 100 is fixed while being in contact with one surface 61 of the top plate 60 A double-sided tape 80 is provided. Therefore, the second polyimide (PI) tape 300 can simultaneously contact one surface of the double-sided tape 80 and one surface 61 of the top plate 60.

The other surface of the film 101 of the surface heating element 100 is coated on one surface 61 of the top plate 60 by applying the adhesive component to one surface 61 of the top plate 60 instead of the double- 61 and may be fixed while the surface heating element 100 is in contact with the one surface 61 of the top plate 60. [

The shape of the surface heat emission element 100 is generally as follows.

The planar heating element 100 does not interfere with a structure provided on one surface 61 of the top plate 60 such as a boss 90 into which the screw or the like is inserted when the inner cover 50 and the outer cover A plurality of concave portions are formed along the edge of the film 101 so as to prevent it.

A tread 190, in which a solenoid valve (not shown) can be disposed, is formed in the substantially central portion of the film 101.

On the other hand, the terminal portion 120 exists on the upper portion of the film 101 with reference to FIG. That is, the terminal portion 120 is located at a portion protruding upward from the upper portion of the film 101 of the planar heating element 100 by a predetermined length.

The terminal unit 120 includes an input terminal 130 and an output terminal 140 which are spaced apart from each other at regular intervals. 2, the input terminal 130 is disposed on the right side and the output terminal 140 is disposed on the left side.

Hereinafter, the approximate shape of the surface heating element pattern 110 printed on the film 101 is as follows.

A first outer pattern 131 is formed along the edge of the film 101 and a second outer pattern 132 spaced apart from the first outer pattern 131 by a predetermined distance is formed. That is, the first outer pattern 131 is extended from the input terminal 130 along the edge of the film 101 in the clockwise direction, and a pattern is formed in a shape of approximately one turn of the edge of the film 101.

The first outer pattern 131 is connected to the second outer pattern 132 through a semicircular fold at an end closest to the output terminal 140.

The second outer pattern 132 extends in the counterclockwise direction opposite to the first outer pattern 131 and forms a pattern along the edge of the film 101. [

On the other hand, a first rectilinear section extending in one direction at an end portion 132b of the second outer pattern 132, a bent section bent in a semicircular shape at an end of the first rectilinear section, The center pattern regions 103 and 105 including the second linear portion extending in the opposite direction of the portion are formed.

In the present invention, a region located below the dotted line A-A 'with respect to the dotted line A-A' shown in FIG. 1 is referred to as a first central patterned region 103, and a dotted line A- Is defined as a second central pattern area 105. [0064]

The end of the first central pattern area 103 is connected to the front end of the second central pattern area 105 on the dotted line A-A 'in FIG. 1, and the end of the second central pattern area 105 is connected to the output terminal 140).

More specifically, the second center pattern region 105 includes a plurality of straight portions and a plurality of bending portions, the extended distance of which is short from the output terminal 140. The first center pattern region 103 includes a plurality of straight portions and a plurality of bending portions extending from the input terminal 130 at an extended distance.

============================ Terminal ===================== =======

Hereinafter, configurations related to the terminal portion 120 and the terminal portion 120 will be described in detail.

2, a cross section cut like the dotted line BB 'in FIG. 2 is a top plate 60, a double-sided tape 80, a second polyimide (PI) tape 300, an area heating element 100, The connection terminals 151 and 161 connected to the tubes 150 and 160 and the tubes 170 and 180 are overlapped with the silicon 250 and the first polyimide tape 200 in this order.

3 is a cross-sectional view taken on the basis of the output terminal 140, but its shape and configuration are the same as those of the input terminal 130.

The cutout portion 135 is formed in the area heating body 100 such that a distance between the input terminal 130 and the output terminal 140 included in the terminal portion 120 is different. Therefore, a distance is formed between the side surface of the input terminal 130 and the side surface of the output terminal 140.

The connection terminals 151 and 161 are formed in a rectangular shape having a substantially rounded corner and two through holes 155 and 165 formed thereon and contacted with the second connection portions 115 and 125 to be described later and the wires 150 and 160 And a connecting portion 163 having a through hole formed therein.

The connection terminals 151 and 161 include a first connection terminal 151 and a second connection terminal 161 where the input terminal 130 and the output terminal 140 are respectively located.

The first connection terminal 151 and the second connection terminal 161 have the same shape.

On the other hand, the tubes 170 and 180 are fitted into the wires 150 and 160, and are fitted to the connecting portions 163 in which the ends of the wires 150 and 160 are inserted. That is, the tubes 170 and 180 are simultaneously inserted into the wires 150 and 160 and the connecting portion 163. Therefore, as shown in FIG. 3, a portion of the portion where the connection portion 163 and the wire 160 are in contact with each other is hidden from the outside by the tube 180.

The silicon 250 applied to the tubes 170 and 180, the connection terminals 151 and 161 and the terminal portion 120 is at least partly contacted with the connection portion 163 of the tubes 170 and 180, the end portion of the connection portion 163 having the through- It is preferable that the connection terminals 151 and 161 are entirely applied to a portion of the terminal portion 120 that is close to the connection terminals 151 and 161. That is, in the present invention, the silicon 250 is applied to only one side of the surface heating element 100 except the other side.

In this case, if there is a space between the tubes 170 and 180 and the connection part 163, the silicone 250 may be applied to the space.

On the other hand, a first connection portion (not shown) of the input terminal 130 is positioned on the film 101 on which the input terminal 130 is located.

The first connection part (not shown) of the input terminal 130 is connected to the first outer pattern 131.

The first connection portion (not shown) of the input terminal 130 is formed to have a rectangular plane.

The lower surface of the first connection portion (not shown) of the input terminal 130 is positioned to abut on the film 101.

The second connection part 115 of the input terminal 130 is located on the upper surface of the first connection part (not shown) of the input terminal 130. More specifically, the upper surface of the first connection portion (not shown) of the input terminal 130 and the lower surface of the second connection portion 115 of the input terminal 130 are in contact with each other.

A first connection terminal 151 made of a metal is positioned on the upper surface of the second connection part 115 of the input terminal 130. That is, the first connecting terminal 151, the input terminal 130, the first connecting portion (not shown) of the input terminal 130, and the film 101 are sequentially stacked in the top-down direction.

The first connection terminal 151 located on the upper surface of the second connection part 115 of the input terminal 130 is penetrated by the two rivets and fixed on the film 101.

Meanwhile, the first wire 150 is fixed to the first connection terminal 151 by a method such as soldering or pressing.

A second connection terminal 161 made of a metal is also fixed on the film 101 by a rivet on the upper surface of the second connection portion 125 of the output terminal 140.

And the second wire 160 is fixed and connected to the second connection terminal 161 by a method such as soldering or pressing.

On the other hand, the first wire 150 and the second wire 160 are not connected to the connection terminals 151 and 161, respectively, and extend inward of the planar heating element 100.

======================== Manufacturing Method ========================

Hereinafter, an embodiment of the method for manufacturing the rice cooker 10 of the present invention will be described with reference to Fig.

The method of manufacturing the electromagnetic cooker 10 according to the present embodiment includes the steps of forming a top plate 60 (see FIG. 1) positioned inside a lid 40 which is hinged to one side of a main body 30 for housing the inner pot 20, (S10) of attaching a second polyimide (PI) tape (300) to a portion where at least one of the one surface (61) of the surface heating element (100) (S60) of attaching the planar heating element 100 to one surface 61 of the top plate 60 so that the other surface of the terminal portion 120 is attached to one surface of the terminal portion 300, the first polyimide PI And attaching the tape 200 (S70).

In the present invention, the step of attaching the surface heat emission element 100 (S60) includes the steps of forming wires (150,160) and tubes (170,180) on the terminal portion (120) formed in the surface heat emission element (100) The surface heating element 100 on which silicon is coated on one surface of the terminal portion 120 and the connection terminals 151 and 161 and the tubes 170 and 180 is connected to one surface 61 of the top plate 60 .

In the present invention, the first polyimide (PI) tape 200 attaching step S70 is performed such that the first polyimide (PI) tape 200 is attached to the ends of the tubes 170 and 180 by a length of at least 7 mm in the longitudinal direction .

More specifically, in the method of manufacturing the electromagnetic rice cooker 10 of this embodiment, an adhesive 80 having a shape similar to the shape of the surface heating element 100, that is, a double-sided tape 80 is formed on one surface 61 of the top plate 60, .

Then, a second polyimide (PI) tape 300 having a size similar to that of the terminal portion 120 is attached to a portion where the terminal portion 120 of the area heat generating element 100 is to be placed (S10). At this time, at least a part of the second polyimide (PI) tape 300 is attached to one surface of the double-sided tape 80.

Thereafter, the first and second connection terminals 151 and 161 are disposed at the input terminal 130 and the output terminal 140 respectively at step S20 and the end of the wire 150 and 160 is connected to the connection part 163 at the end of the connection terminal 151 and 161, And the tubes 170 and 180 are inserted into the outer surface of the connection part 163 so as to cover the connection part between the connection part 163 and the wires 150 and 160 in step S40.

Thereafter, the silicon 250 is coated on one surface of the terminal portion 120, the connection terminals 151 and 161 and the tubes 170 and 180, and at least a portion of the tubes 170 and 180 that are in contact with the connection portion 163, The silicon 250 is applied to a portion of the end of the connection portion 163 where the ball is formed, the entire connection terminals 151 and 161 and the connection terminals 151 and 161 among the terminal portions 120 (S50). Therefore, the present invention does not apply silicon to the other surface of the terminal portion 120 of the planar heating element 100 and the one surface 61 of the top plate 60, thereby improving the manufacturing process of the rice cooker 10 .

Thereafter, the surface heating element 100 is placed on one surface 61 of the top plate 60 so that the other surface of the terminal portion 120 is attached to one surface of the second polyimide (PI) tape 300 (S60).

The first polyimide (PI) tape 200 is then attached to the entirety of the silicon 250, all the surfaces of the terminal portions 120, and the surface heating elements 100 to cover the terminal portions 120 to correspond to the terminal portions 120 (S70). At this time, the overlapping distance between the first polyimide (PI) tape 200 and the tubes 170 and 180 is at least 7 mm.

The electromagnetic cooker 10 manufactured as described above has the tubes 170 and 180 extending from the connecting portion of the connecting portion 163 and the wires 150 and 160 to a position farther in the longitudinal direction and the connecting portions 163 and the wires Since the first polyimide (PI) tape 200 is attached to a position at least 7 mm or more in the longitudinal direction from the connecting portion of the first and second heat sinks 150 and 160, the terminal portion 120 is cut off from the outside,

In the meantime, unlike the embodiment of the present invention, the first and second connection terminals 151 and 161 are disposed at the input terminal 130 and the output terminal 140, respectively. At step S20, connection parts 163 A step S40 of inserting the tubes 170 and 180 into the outer surface of the connection part 163 so as to cover the connection part between the connection part 163 and the wires 150 and 160, The step S50 of applying the silicone 250 to the portion of the terminal portion 120 that is close to the connection terminals 151 and 161 may be performed by forming the second polyimide PI on the portion where the terminal portion 120 of the planar heating element 100 is to be positioned, It may be a step performed before the tape attaching step S10. That is, the surface heat emission element 100 is connected to the connection terminals 151 and 161 having the wires 150 and 160 and the tubes 170 and 180 connected to the terminal portion 120, and the connection terminals 151 and 161 are connected to the connection terminals 151 and 161, (S10) of attaching the second polyimide (PI) tape 300 in a state that the silicone 250 is coated on one side is executed.

1, the wires 150 and 160 and the tubes 170 and 180 are partially omitted. Although FIG. 3 shows the output terminal 140 as a reference, the input terminal 130 has the same shape and structure as the input terminal 130. In addition, FIG. 3 does not show the second connection portion 125, which will be described later.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims Or modification of the invention.

10: rice cooker 20: inner pot
30: Body 40: Lid
60: Top plate 100: Planar heating element
101: film 120: terminal portion
130: Input terminal 140: Output terminal
150, 160: wire 151: first connection terminal
161: second connection terminal 163: connection part
170, 180: tube 200: first polyimide tape
250: Silicone 300: Second polyimide tape

Claims (4)

A main body housing the inner pot;
A cover hinged to one side of the main body so as to be opened and closed;
A top plate positioned within the lid;
A planar heating element provided on one surface of the top plate and made of a film on which a planar heating element pattern is printed;
A terminal portion formed on the planar heating element;
A first polyimide (PI) tape attached to one surface of the terminal portion;
And a second polyimide (PI) tape having at least a portion where at least the terminal portion is located and a second polyimide (PI) tape to which both surfaces are attached to the other surface of the terminal portion,
The method according to claim 1,
A connection terminal disposed on one surface of the terminal portion;
A wire connected to an end of the connection terminal;
And a tube fitted to the wire so as to cover a connection portion between the connection terminal and the wire,
Wherein the first polyimide (PI) tape is attached at a length of at least 7 mm in the longitudinal direction from the end of the tube.
Attaching a second polyimide (PI) tape to a portion of the top plate positioned inside the lid which is hingably connected to one side of the main body housing the inner pot to be opened and closed and at least a terminal portion of the surface heating element is to be positioned;
Attaching the planar heating element to one surface of the top plate so that the other surface of the terminal portion is attached to one surface of the second polyimide (PI) tape;
And attaching a first polyimide (PI) tape to the upper portion of the terminal portion.
The method of claim 3,
The step of attaching the plate type heating element may include attaching a surface heating element having silicon on one surface of the terminal portion, the connection terminal and the tube to one surface of the top plate, ego,
Wherein the step of attaching the first polyimide (PI) tape is a step of attaching the first polyimide (PI) tape at a length of at least 7 mm in the longitudinal direction from the end of the tube

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