KR20230143304A - Electric range - Google Patents

Abstract

The present invention configures an indicator module, which visually displays whether the heating unit is operating and its operating state, to be directly supported and fixed on one side of the mounting plate supporting the heating unit, so that manufacturing costs and manufacturing man-hours can be minimized, and the indicator module is generated from the working coil. This relates to an electric range that minimizes the conduction of high heat generated from the heated object and the high heat generated through the mounting plate, effectively blocking heat conducted toward the indicator module and effectively preventing thermal damage to the indicator module.

Description

Electric range {ELECTRIC RANGE}

The present invention relates to an electric range, and more specifically, to minimize the conduction of the high heat generated in the working coil and the high heat generated in the heated object through the mounting plate, effectively blocking the heat conducted toward the indicator module and protecting the indicator module. This is about an electric range that can effectively prevent heat damage.

Various types of cooking appliances are used to heat food at home or in restaurants. Such cooking utensils include gas ranges that use gas and electric ranges that use electricity.

Electric ranges can be broadly divided into resistance heating and induction heating.

The resistance heating method generates heat by applying current to a non-metallic heating element such as a metal resistance wire or silicon carbide. The resistance heating method radiates or conducts the generated heat to heat the object to be heated (for example, cooking vessels such as pots and frying pans).

The induction heating method applies high-frequency power to the coil to generate an electromagnetic field around the coil. The induction heating method generates eddy current in a heated object made of metal using a generated electromagnetic field to generate heat in the heated object.

That is, when current is applied to the working coil or heating coil, heat is generated through induction heating of the object to be heated. Through this, the food accommodated inside the heating object can be cooked.

The conventional induction heating type electric range configured in this way includes a heating unit in which a working coil is wound, an indicator module disposed in a separate position from the heating unit and indicating whether the heating unit is operating and its operating state, a heating unit, and It may be configured to include a cover plate disposed on the upper side of the indicator module.

The user can visually recognize information about the operation of the heating unit based on whether or not the LED element provided in the indicator module emits light and the amount of light emitted.

In relation to this, Korean Patent Registration No. 10-2270491 (Prior Document 001) states that the indicator module is connected to a mounting plate on which the heating unit is placed, but the indicator module is attached to the mounting plate using a module bracket provided separately from the mounting plate. A configuration for connecting and fastening is disclosed.

At this time, the module bracket on which the indicator module is placed is configured to be fastened to the mounting plate using a plurality of fasteners such as screw bolts.

Therefore, the electric range disclosed in prior document 001 has the problem of increased manufacturing cost and manufacturing man-hours because fastener means and a fastening process for connecting and fastening the module bracket to the mounting plate must be added.

In addition, the electric range disclosed in prior document 001 is configured so that a portion that is physically contacted occurs at least partially at an intermediate position between the module bracket and the fastening position of the module bracket and the mounting plate.

Therefore, when the heating unit operates, there is a very high possibility that the high heat generated in the working coil itself and the high heat generated in the heating process of the heated object will be conducted to the indicator module through the mounting plate and module bracket, and the indicator module may be damaged by the conducted heat. There is a high probability that there will be a problem.

Korean Patent Registration No. 10-2270491

The present invention was devised to solve the problems of the prior art described above. An indicator module that visually displays whether the heating unit is operating and its operating state is configured to be directly supported and fixed on one side of the mounting plate that supports the heating unit. The first purpose is to provide an electric range that can minimize manufacturing cost and manufacturing time.

In addition, the present invention minimizes the conduction of high heat generated in the working coil and high heat generated in the heated object through the mounting plate, effectively blocking heat conducted toward the indicator module and effectively preventing thermal damage to the indicator module. The second purpose is to provide an electric range.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

An electric range according to the present invention includes a cover plate on which an object to be heated is placed on the upper side; a heating unit disposed below the cover plate and generating heat in the object to be heated through an electromagnetic field generated from a working coil; A mounting plate disposed below the heating unit and on which the heating unit is fixed; and an indicator module attached to one edge of the mounting plate and visually indicating whether the heating unit is operating or in an operating state, wherein the mounting plate is positioned at a position spaced apart from the indicator module toward the heating unit. It is formed and is characterized in that it is provided with a slit-shaped long hole formed by perforating the mounting plate in the vertical direction.

In addition, the indicator module includes: an LED circuit board on which a plurality of LED elements are mounted; and a circuit board holder on which the LED circuit board is installed, and the circuit board holder may be directly fixed to one edge of the mounting plate.

In addition, the LED circuit board has a rectangular outline that extends linearly so that the plurality of LED elements can be linearly arranged, and the slit-shaped long hole will be a rectangular opening extending parallel to the LED circuit board. You can.

Additionally, the length of the slit-shaped long hole may be smaller than the length of the LED circuit board.

In addition, the gap between the LED circuit board and the slit-shaped long hole can be kept constant while moving along the longitudinal direction of the slit-shaped long hole.

Additionally, the slit-shaped long hole may be formed closer to the heating unit than the LED circuit board in the horizontal direction.

In addition, the heating unit includes a cylindrical core frame on which the coil is wound on an upper side, and the length of the slit-shaped long hole may be smaller than the outer diameter of the core frame.

Additionally, the length of the slit-shaped long hole may be larger than the radius of the core frame.

Additionally, the slit-shaped long hole may be at least partially obscured by the core frame when viewed from the top of the core frame.

In addition, the heating unit includes a fastening tab that is integrally formed on the outer peripheral surface of the core frame and is fastened to the mounting plate through a separate fastener; and a guide protrusion formed at a position spaced apart from the fastening tab in the circumferential direction and maintaining the pre-assembled state of the core frame before the fastener is coupled, wherein the slit-shaped long hole is between the fastening tab and the guide protrusion. It may be extended.

In addition, at least one of one edge or the other edge constituting the long side of the slit-shaped long hole may be provided with a plate-shaped bending portion formed by bending the mounting plate downward and extending along the longitudinal direction of the slit-shaped long hole. You can.

Additionally, the height at which the bending portion protrudes from the lower side of the mounting plate may be smaller than or equal to the width of the slit-type long hole.

In addition, the bending part includes: a plate-shaped first bending part provided at one edge of the slit-shaped long hole and formed by bending the mounting plate in a downward direction; And it may include a plate-shaped second bending part provided on the other edge of the slit-shaped long hole and formed by bending the mounting plate in a downward direction.

In addition, the sum of the height at which the first bending portion protrudes from the lower side of the mounting plate and the height at which the second bending portion protrudes from the lower side of the mounting plate will be smaller than or equal to the width of the slit-shaped long hole. You can.

Additionally, the height at which the first bending portion protrudes from the lower side of the mounting plate may be equal to the height at which the second bending portion protrudes from the lower side of the mounting plate.

In addition, a resistance heating type disposed at the bottom of the cover plate and spaced rearward from the heating portion, and heats the object to be heated through high heat generated from the heating wire: and the resistance heating type heating portion is isolated from the heating portion and is spatially spaced. It may further include a partition separating the partition wall from the mounting plate.

In addition, the partition wall includes a first panel and a second panel respectively arranged in an L shape to surround the resistance heating type heating unit; And one end is integrally connected to the first panel, the other end is integrally connected to the second panel, and may include a corner portion extending in a direction intersecting the first panel and the second panel, respectively.

Additionally, a switching element that generates high frequency power and supplies it to the working coil; and a blowing module that generates an airflow of external air for cooling the switching element, wherein some of the airflow of external air generated through the blowing module flows to the lower side of the mounting plate through the edge of the partition wall. It can be done.

The electric range according to the present invention has an indicator module that visually displays whether the heating part is operating and its operating state, and is directly supported and fixed on one side of the mounting plate that supports the heating part, thereby minimizing manufacturing costs and manufacturing man-hours. have

In addition, the electric range according to the present invention minimizes the conduction of high heat generated in the working coil and high heat generated in the heated object through the mounting plate, effectively blocking heat conducted toward the indicator module and preventing thermal damage to the indicator module. It has the effect of effectively preventing.

In addition to the above-described effects, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

Figure 1 is an exploded perspective view of an electric range according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of the electric range of Figure 1 excluding the cover plate.
Figure 3 is a plan view of Figure 2.
Figure 4 is a plan view showing a state in which the second heating unit and the second indicator module shown in Figure 3 are installed on the first mounting plate.
Figure 5 is an exploded perspective view of Figure 4.
Figure 6 is a partially enlarged view of Figure 4.
Figure 7 is a cross-sectional view of Figure 6.
Figure 8 is a cross-sectional view of Figure 6, showing an embodiment in which a bending part is added.
Figure 9 is test data showing temperature measurement results for a comparative example manufactured according to the prior art.
10 to 12 are test data showing temperature measurement results for the first to third experimental examples.

The above-mentioned objects, features, and advantages will be described in detail later with reference to the attached drawings, so that those skilled in the art will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, identical reference numerals are used to indicate identical or similar components.

Although first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another component, and unless specifically stated to the contrary, the first component may also be a second component.

Throughout the specification, unless otherwise stated, each element may be singular or plural.

Hereinafter, the “top (or bottom)” of a component or the arrangement of any component on the “top (or bottom)” of a component means that any component is placed in contact with the top (or bottom) of the component. Additionally, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Additionally, when a component is described as being “connected,” “coupled,” or “connected” to another component, the components may be directly connected or connected to each other, but the other component is “interposed” between each component. It should be understood that “or, each component may be “connected,” “combined,” or “connected” through other components.

As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, terms such as “consists of” or “comprises” should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or steps may include It may not be included, or it should be interpreted as including additional components or steps.

Additionally, as used herein, singular expressions include plural expressions, unless the context clearly dictates otherwise. In the present application, terms such as “consists of” or “comprises” should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or steps may include It may not be included, or it should be interpreted as including additional components or steps.

Throughout the specification, when referred to as “A and/or B”, this means A, B or A and B, unless specifically stated to the contrary, and when referred to as “C to D”, this means unless specifically stated to the contrary. Unless there is one, it means that it is C or higher and D or lower.

Hereinafter, the present invention will be described with reference to drawings showing the configuration of the electric range 1 according to an embodiment of the present invention.

[Overall composition of electric range]

Figure 1 is an exploded perspective view of an electric range 1 according to an embodiment of the present invention, and Figure 2 is a perspective view of a portion of the electric range 1 of Figure 1 excluding the cover plate 20. The configuration of the electric range 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The electric range 1 according to an embodiment of the present invention may be a so-called hybrid electric range 1, which is provided with an induction heating type heating unit and a resistance heating type heating unit.

1 to 3 illustrate an electric range 1 provided with a total of three heating units 30.

Hereinafter, by way of example, the first heating unit 31 disposed on the left and the second heating unit 32 disposed on the front right are induction heating types, and the third heating unit 33 disposed on the rear right is a resistance heating type. The description will be based on an example in which the heating method is used.

The third heating unit 33 of the resistance heating type generates high heat by applying current to the heating wire 331, which is made of a metal resistance wire or a non-metallic heating element built inside, and transfers the high heat to the object to be heated, thereby heating the object. It may be configured to heat.

Since the well-known resistance heating type configuration can be applied to the third heating unit 33, a description of the detailed configuration of the third heating unit 33 will be omitted below.

On the other hand, since the third heating unit 33 of the resistance heating type is configured to generate high heat on its own and transfer it to the heating object, at least some of the generated high heat is transferred to the first heating unit 31 and the second heating unit 31, which will be described later. 2 There is a high possibility that it will be transmitted to the heating unit 32.

As shown, there is a partition around the third heating unit 33 as a means to minimize the transfer of high heat generated by the third heating unit to the first heating unit 31 and the second heating unit 32. (332) may be provided.

As shown in FIGS. 2 and 3, the partition wall 332 isolates and spatially separates the third heating unit 33 disposed at the right rear from the first heating unit 31 and the second heating unit 32. It serves to protect the first heating unit 31 and the second heating unit 32 from the high heat generated from the third heating unit 33.

For this purpose, the partition 332 exemplarily includes a first panel 3321 extending along the left and right directions in the form of blocking between the second heating unit 32 and the third heating unit 33, and a first heating unit ( 31) and the third heating unit 33, a second panel 3322 extends along the front-back direction in the form of blocking, one end is integrally connected to the first panel 3321, and the other end is connected to the second panel 3322. ) may be configured to include a corner portion 3323 integrally connected to the

Therefore, as shown, the partition wall 332 may be manufactured in an overall L-shape to surround the third heating unit 33, and may be formed through press processing of a metal plate.

To prevent the high heat generated from the third heating unit 33 from being directly conducted, the first panel 3321 and the second panel 3322 are separated from the second mounting plate 42 and the first mounting plate 41, respectively. It can be arranged to be separated with a gap formed.

At this time, the corner portion 3323 provided at the corner where the first panel 3321 and the second panel 3322 are connected is oriented in a direction that intersects the first panel 3321 and the second panel 3322. It can be formed to extend.

That is, the edge portion 3323 may extend in a diagonal direction that intersects the front-back direction and the left-right direction, respectively. Through this, a chamfered camper surface may be formed on the corner side of the partition wall 332 by the corner portion 3323.

As will be described later, a blowing module 90 that generates an airflow of external air for cooling the switching element may be disposed on the lower side of the first mounting plate 41.

Some of the air currents generated through the blowing module 90 are guided toward the first heating unit 31 and the second heating unit 32 to cool the first heating unit 31 and the second heating unit 32. It can be used.

The camper surface formed on the corner 3323 side of the partition 332 expands the passage area through which the airflow of external air flows toward the second heating unit 32, and directs the airflow of external air to the second heating unit 32. It serves as a guide toward (32).

Therefore, compared to the case where the camper surface is not formed, a larger airflow of external air flowing along the outer surface of the edge portion 3323 can be secured, and more external air for cooling the second heating unit 32 may be supplied to the lower side of the second mounting plate 42, thereby preventing overheating of the second heating unit 32.

Meanwhile, as described above, the first heating unit 31 and the second heating unit 32 are configured to heat the object to be heated by induction heating.

The induction heating method applies high-frequency power to a working coil to generate a magnetic field around the working coil, and uses the eddy current generated by the generated magnetic field to heat a heated object made of metal.

That is, in the heating units 31 and 32 where the working coil has a structure adjacent to a ferrite core, high-frequency power is applied to the working coil to generate a magnetic field around the working coil, and the heated object is heated within the area of the generated magnetic field. When the sieve is placed, eddy currents may be induced in the heated object by the magnetic field.

Joule's heat is generated by the generated eddy current, so that the object to be heated can be heated, and the dishes, which are the object to be heated, are heated, so that food contained in the object to be heated can be heated and cooked.

Meanwhile, as shown, the electric range 1 according to an embodiment of the present invention includes a case 10, a cover plate 20, a mounting plate 40, and a base bracket ( 50).

The case 10 forms the outer body and may function to protect the components constituting the electric range 1. For example, the case 10 may be made of a lightweight metal material such as aluminum, but is not limited thereto.

Case 10 may be insulated to prevent heat generated by the working coil from being released to the outside.

The case 10 can store internal components that make up the electric range 1, such as the heating unit 30, the mounting plate 40, the base bracket 50, and the control circuit board module 80, and has an upper surface. is open. The open upper surface can be closed by the cover plate 20.

The case 10 may be manufactured as a whole into a box shape by press processing a plate-shaped material.

Meanwhile, the case 10 may be configured to include a first casing 110 and a second casing 120.

The first casing 110 forms the bottom surface of the case 10. Accordingly, the first casing 110 may serve to accommodate and support the internal components of the electric range 1 described above from the downward direction.

As a means to facilitate accommodation and support of such internal components, a plurality of forming parts formed through press processing may be included.

Meanwhile, the first casing 110 has at least one airflow channel to facilitate cooling of the control circuit board module 80 provided therein and the circuit element components mounted on the control circuit board module 80. An intake port 112 and at least one outlet 111 through which air is exhausted may be provided.

As shown in FIG. 1, at least one outlet 111 and at least one intake port 112 may be provided in the form of a grill, through which the inflow of external foreign substances can be prevented.

The second casing 120 is formed by bending the first casing 110 and may form the side surface of the case 10.

The second casing 120 may be bent in the vertical direction (U-D direction) at the edge of the first casing 110 to form the side wall of the electric range 1. Through this, the second casing 120 can be provided to surround the base bracket 50, which will be described later.

A second casing 120 may be formed on each side of the first casing 110, which is generally formed in a square shape. The second casing 120 can reinforce the overall rigidity of the case 10.

That is, the second casing 120, which is formed to be bent from the first casing 110, can prevent the plate-shaped first casing 110 from being bent or damaged due to the weight of the built-in component or external force.

The second casing 120 may further include a plurality of ventilation holes 121 that are formed in a slit shape. The ventilation hole 121 allows the inside and outside of the case 10 to communicate with each other and allows air to flow through the ventilation hole 121, thereby contributing to cooling the components stored inside the case 10.

Meanwhile, a supporting flange 130 may be provided at the top of the second casing 120.

The supporting flange 130 may be bent from the top of the second casing 120 toward the inside of the case 10, and serves to support the mounting plate 40, which will be described later, from the lower part. Exemplarily, the supporting flange 130 may be formed in a plurality of places by bending the top of the left, right, and rear portions of the second casing 110. The individual supporting flange 130 may be provided with a fastening hole for fastening bolts.

The bottom surface of the mounting plate 40 is seated on the upper surface of the supporting flange 130, and the mounting plate 40 and the supporting flange 130 may be coupled to each other by fasteners such as fastening bolts or screw bolts.

Preferably, the left end and front and rear ends of the first mounting plate 41 constituting the mounting plate 40, and the right end and front end of the second mounting plate 42 may be supported and coupled by the supporting flange 130. . Meanwhile, the right end of the first mounting plate 41 and the left end of the second mounting plate 42 may be supported by the supporting bracket 530.

Meanwhile, the cover plate 20 is coupled to the top of the case 10, and the object to be heated can be placed on the top. The cover plate can close the open upper surface of the case 10 to protect the components stored inside the case 10.

A heating object is placed on the upper surface of the cover plate 20, and the magnetic field generated from the first heating unit 31 and the second heating unit 32 can pass through the cover plate 20 and reach the heating object. , high heat generated in the third heating unit 33 may be conducted to the object to be heated through the cover plate.

Therefore, the cover plate 20 may be formed of a material with excellent heat resistance, such as ceramic or tempered glass, but is not limited thereto.

An input interface (not shown) that receives manipulation from the user may be installed on the upper surface of the cover plate 20. The input interface is installed in a specific area on the upper surface of the cover plate 20 and can display a specific image.

The input interface may receive a touch input from the user, and the electric range 1 may be driven based on the received touch input.

For example, the input interface is a module for inputting the user's desired heating intensity or heating time, and can be implemented as a physical button or touch panel.

A touch circuit board module 85 through which a user's touch manipulation is input may be provided at the lower part of the cover plate 20 and the lower part of the input interface.

The touch circuit board module 85 may include a plurality of key switches and a touch circuit board on which the plurality of key switches are mounted. The user can control the operation of the electric range 1 by inputting commands to the touch circuit board module through the key switch.

In addition, a display (not shown) that displays the operating status of the first heating unit 30 of the electric range 1 is provided in a specific area of the upper surface of the cover plate 20 for each individual heating unit 31, 32, and 33. It can be. However, this display may be omitted in the third heating unit 33 using the electric resistance heating method.

Hereinafter, the description will be made on the assumption that only the first heating unit 31 and the second heating unit 32 configured by the induction heating method are provided with displays.

A light display area may be formed on the upper surface of the cover plate 20 as a display. An indicator module 84 may be placed on the lower part of the cover plate 20 corresponding to the light display area, and light emitted from the indicator module 84 may be transmitted to the user through the light display area. By way of example, the indicator module 84 may be placed and fixed on each mounting plate 41 and 42, as will be described later. For distinction, the one placed on the first mounting plate 41 will be called the first indicator module 841, and the one placed on the second mounting plate 42 will be called the second indicator module 842.

Each of the mounting plates 41 and 42 may be integrally provided with an indicator connection portion for supporting and fixing the first indicator module 841 and the second indicator module 842.

Meanwhile, the electric range 1 according to an embodiment of the present invention may further include a cover bracket 70 for supporting the cover plate 20 and connecting the cover plate 20 to the case 10. .

As shown in FIG. 1, the cover bracket 70 is disposed on the outside of the holding plate 40 and the case 10, is coupled to the case 10, and can support the cover plate 20. For example, the cover bracket 70 may be coupled to the case 10 using a fastener such as a case fastening bolt (not shown).

Meanwhile, among the heating units 30, the first heating unit 31 and the second heating unit 32 are disposed below the cover plate 20 and can heat the object to be heated by induction heating.

The first heating unit 31 and the second heating unit 32 may be configured to have the same heating capacity or different heating capacities.

The drawing shows an embodiment provided with a first heating unit 31 and a second heating unit 32 having different heating capacities. The present invention is not limited to this, but will be described based on an embodiment in which the first heating unit 31 and the second heating unit 32 have different heat generation capacities.

The first heating unit 31 may be mounted on the upper surface of the first mounting plate 41, and the second heating unit 32 may be mounted on the upper surface of the second mounting plate 42.

The first heating unit 31 and the second heating unit 32 have a core frame in common, and are configured such that a working coil is spirally wound on the upper surface of the core frame, and a ferrite core is mounted on the lower surface of the core frame. You can.

Therefore, when high frequency power is applied to the working coil, a magnetic field is formed around the ferrite core, and the formed magnetic field can form an eddy current in the object to be heated.

Each working coil has a pair of lead wires, and a lead wire terminal may be provided at an end of each lead wire.

Meanwhile, a temperature sensing unit 60 may be provided at the center of the first heating unit 31 and the second heating unit 32.

The temperature sensing unit 60 is configured to measure the temperature of the cover plate 20 by directly contacting the lower side of the cover plate 20, and its sensing surface is always in contact with the lower side of the cover plate 20. can be arranged to maintain.

Meanwhile, the first heating unit 31 and the second heating unit 32 are disposed and supported on the mounting plate 40.

As in the embodiment shown in FIG. 3, the mounting plate 40 may be divided into a plurality of pieces.

Preferably, the mounting plate 40 is divided into a first mounting plate 41 supporting the first heating unit 31 and a second mounting plate 42 supporting the second heating unit 32. It can be.

The first mounting plate 41 and the second mounting plate 42 may be made of a lightweight metal material, for example, aluminum, but are not limited thereto.

The first mounting plate 41 may include a plate-shaped main plate disposed in a substantially horizontal direction and a reinforcement plate bent upward from the outer edge of the main plate. The main plate forms the bottom surface of the first mounting plate 41, and the first heating unit 31 may be mounted on the upper surface.

Likewise, the second mounting plate 42 may include a plate-shaped main plate disposed in a substantially horizontal direction and a reinforcement plate bent upward from the outer edge of the main plate. The main plate forms the bottom surface of the second mounting plate 42, and the second heating unit 32 may be mounted on the upper surface.

The main plate of the first mounting plate 41 and the main plate of the second mounting plate 42 support the main circuit board module 81 and the power circuit board module 83 provided at the bottom in the upward direction (U-direction). It can be provided to cover the entire thing.

Due to this structure, the main plate of the first mounting plate 41 and the main plate of the second mounting plate 42 are subjected to electromagnetic fields and electromagnetic waves generated from the first heating unit 31 and the second heating unit 32. It can serve to shield elements mounted on the circuit board module 81 and the power circuit board module 83 from reaching them.

That is, the first mounting plate 41 and the second mounting plate 42 may serve to improve electromagnetic compatibility (EMC) and electromagnetic interference (EMI) performance of the printed circuit board 51.

The reinforcing plate of the first mounting plate 41 and the reinforcing plate of the second mounting plate 42 may each be bent from the main plate in the upward direction (U-D direction) of the electric range 1.

As shown, reinforcement plates may be formed on each side of the main plays, which are generally formed in a square shape.

Through these reinforcement plates, the overall rigidity of the first mounting plate 41 and the second mounting plate 42 can be reinforced. That is, the plate-shaped main plate can be prevented from being bent or damaged by the weight of the internal components including the first heating unit 31 and the second heating unit 32 or external force through the reinforcing plate.

Meanwhile, a first indicator module 841 and a second indicator module 842 may be disposed on the first mounting plate 41 and the second mounting plate 42, respectively.

Indicator connection parts for supporting the first indicator module 841 and the second indicator module 842 may be formed on the main plate of the first mounting plate 41 and the main plate of the second mounting plate 42, respectively.

These indicator connection parts may be provided in such a way that the main plate of the first mounting plate 41 and the main plate of the second mounting plate 42 are formed by partially cutting and bending.

The first indicator module 841 and the second indicator module 842 may be provided with a plurality of LEDs arranged in a row. The plurality of LEDs light up when the first heating unit 31 or the second heating unit 32 operates, thereby visually informing the user whether the heating unit 30 is operating and its operating state.

In addition, the first indicator module 841 and the second indicator module 842 may inform the user whether the electric range 1 is operating and its operating state by changing the lighting shape and color of the plurality of LEDs.

The detailed configuration of the second heating unit, the second mounting plate, and the second indicator module will be described later with reference to FIG. 4 and below.

Meanwhile, the base bracket 50 is disposed at the lower part of the first mounting plate 41, and the main circuit board module 81 and the power circuit board module 83, which constitute the control circuit board module 80, are mounted, It serves to support the main circuit board module (81), the power circuit board module (83), and the blowing module (90).

The lower part of the base bracket 50 may be supported on the first casing 110 at multiple locations.

As shown in FIGS. 1 to 3, the main circuit board module 81 and the power circuit board module 83, which constitute the control circuit board module 80, may be mounted on the base bracket 50. Although not limited to this, the control circuit board module 80 includes the above-described indicator module 84 and the touch circuit board module 85 in addition to the main circuit board module 81 and the power circuit board module 83. It can be understood as a higher-level concept.

The main circuit board module 81 is provided with a control unit for controlling the overall operation of the electric range 1, and is electrically connected to the touch circuit board module 85 and the indicator module 84 described above.

In addition, the main circuit board module 81 includes a central processing unit as a control unit known in the form of a microcontroller, microcomputer, or microprocessor, and receives power from the power circuit board module 83, converts it into high-frequency power, and converts it into high-frequency power for working purposes. A plurality of switching elements and bridge circuit elements that supply the coil may be arranged together on the center side. That is, the plurality of switching elements can function as a power conversion module.

At this time, a plurality of IGBTs (insulated gate bipolar transistors) may be applied to the switching element 812. However, the IGBT type switching element is a component that generates a lot of heat, and if this heat generation is not maintained at an appropriate level, there is a high possibility that the lifespan of the switching element will be shortened or malfunction of the switching element will occur.

As a means for cooling the switching element 812, an air guide 92 and a blowing module 90 may be provided in the main circuit board module 81, as will be described later.

The power circuit board module 83 may be placed behind the main circuit board module 81. The power circuit board module 83 can be modularized by mounting a high-voltage element known as SMPS (Switching Mode Power Supply) on a power circuit board, and converts external power into a stable state before it is supplied to the switching element. performs its role.

The blower fan-motor assembly constituting the blower module 90 may be placed on the base bracket 50 as the rear of the main circuit board module 81.

The blowing module 90 serves to suck in external air flowing in through the inlet 112 and the base bracket 50 of the above-described first casing 110 and blow it to the inside and outside of the air guide 92. .

As shown, there is no limit to the blower fan applied to the blower fan-motor assembly, but a sirocco fan is preferable in consideration of locational and spatial constraints where the blower fan is installed. As in the embodiment, when a sirocco fan is applied, external air may be sucked in from the bottom of the sirocco fan in a direction parallel to the rotation axis, and the air may be accelerated toward the outside in the radial direction and discharged.

In order to increase blowing efficiency, the outlet end of the blowing fan may be directly connected to the inlet of the air guide 92, and some of the external air forced to flow by the blowing fan may flow into the interior of the air guide 92.

The air guide 92 has a U-shaped cross section and may be formed in a box shape with the lower side entirely open.

The switching element is entirely accommodated in the U-shaped internal space, and a cooling passage dedicated to the switching element through which external air blown through the above-mentioned blowing fan flows may be formed.

The external air introduced into the cooling passage inside the air guide 92 moves forward while exchanging heat with the switching element, and finally moves downward (D-direction), and finally moves to the first casing. It can be discharged to the outside through the outlet 111 of (110).

Meanwhile, the remaining part of the external air forced by the blowing fan is discharged to the outside of the air guide, and the airflow of the discharged external air flows to the lower side of the first heating unit 31 and the first mounting plate 41. It may be moved to cool the first heating unit 31.

[Detailed configuration of the second heating unit, second mounting plate, and second indicator module]

Hereinafter, with reference to FIG. 4 and below, the detailed configuration of the second heating unit 32, the second mounting plate 42, and the second indicator module 842 of the electric range 1 according to an embodiment of the present invention will be described. do.

First, referring to FIGS. 3 and 4, the second heating unit 32 may include a working coil 322, a core frame 321, and a ferrite core 323. Unless otherwise explained, the configuration of the second heating unit 32 described below can be applied generally in the same way to the first heating unit 31 with only differences in heating capacity and size.

As shown, the core frame 321 may be formed to have a hollow cylinder shape with an overall empty interior, and the lower side is entirely open.

A working coil 322 is wound in a spiral manner on the upper side of the disk portion 3211 constituting the upper side of the core frame 321.

To enable the working coil 322 to be wound in a spiral shape, there is a guide rail 3213 on the upper side of the disk portion 3211 that extends in a spiral shape while proceeding from the radial outer side of the disk portion 3211 toward the radial inner side. It can be provided.

The guide rail 3213 is formed to have a predetermined height in the upward direction (U-direction) from the upper side of the disk portion 3211, and is a spiral track in which the walking coil 322 is accommodated between adjacent guide rails 3213. (3213a) may be formed.

The height at which the guide rail 3213 protrudes is preferably greater than the diameter of the working coil 322 so that the working coil 322 is not exposed in the upward direction (U-direction). Additionally, when the working coil 322 is wound multiple times in multiple layers, the height of the guide rail 3213 may be formed in accordance with the number of layers of the working coil 322.

The top of the guide rail 3213 is in direct contact with the lower side of the cover plate 20, and serves to support the load of the object to be heated placed on the upper side of the cover plate 20.

Meanwhile, at least one through hole 3213c may be formed to penetrate the disk portion 3211 in the vertical direction (U-D direction). At this time, at least one through hole 3213c is formed to penetrate the guide rail 3213. That is, the inside and outside of the core frame 321 may be communicated through the through hole 3213c.

At this time, at least one through hole 3213c may be formed between core receiving portions 3213b, which will be described later. That is, the disk portion 3211 and the guide rail 3213 formed between the core receiving portions 3213b disposed adjacently can be at least partially opened in the vertical direction (U-D direction) by the through hole 3213c.

Therefore, the inside and outside of the core frame 321 can be communicated through the through hole 3213c, and the through hole 3213c allows the heat transferred from the cover plate 20 and the heat generated from the working coil 322 to pass through the core frame ( 321), it functions as a passage to escape to the outside rather than being trapped inside.

Therefore, as will be described later, through the main ventilation hole 4218 formed in the main plate 421 of the second mounting plate 42 and the through hole 3213c of the core frame 321, the internal space of the core frame 321 is It may communicate with the lower side and upper side of the second mounting plate 42, and an air passage advantageous for cooling the working coil 322 may be formed.

Meanwhile, the working coil 322, which is spirally wound around the guide rail 3213 and generates a magnetic field by receiving high-frequency power, may be made of, for example, Ritz wire, which has excellent durability. However, it is not limited to this.

A circular area in which the guide rail 3213 is not formed, or in other words, the working coil 322 is not wound, may be formed in the center of the disk portion 3211 of the core frame 321.

At the center of this circular area, a mounting hole 3211a may be formed by penetrating the disk portion 3211 in the vertical direction (U-D direction).

In the mounting hole 3211a, the plate temperature sensor 61 constituting the temperature sensing unit 60 described above and the sensor holder 62 on which the plate temperature sensor 61 is installed can be disposed.

Meanwhile, at the inner end of the guide rail 3213, which is the point where the guide rail 3213 ends inside, one end of the working coil 322 or the lead line 322a (FIG. 3) of the working coil 322 is pointed downward ( A coil hole 3211b may be formed for guiding in the D-direction.

Meanwhile, a plurality of ferrite cores 323 may be disposed on the lower side of the disk portion 3211 of the core frame 321.

A core receiving portion 3213b arranged radially may be formed on the lower side of the core frame 321.

A ferrite core 323 having an outer shape corresponding to the internal shape of the core accommodating portion 3213b may be mounted on the individual core accommodating portion 3213b. Accordingly, the number of core receiving portions 3213b may be equal to the number of ferrite cores 323.

The downward (D-direction) end of the core receiving portion 3213b comes into direct contact with the upper surface of the main plate 421 of the above-described second mounting plate 42. Through this, the load of the heated object transmitted to the disk portion 3211 is transmitted to the core receiving portion 3213b through the guide rail 3213, and is finally transmitted to the main plate 421 of the second mounting plate 42. It can be.

That is, the core receiving portion 3213b has a dual function of accommodating the ferrite core 323 and supporting an external load inside the core frame 321.

Meanwhile, a cylindrical edge wall portion 3212 extending downward (D-direction) may be formed integrally with the radial outer edge of the disk portion 3211 of the core frame 321.

The cylindrical edge wall portion 3212 serves to define the internal space of the core frame 321, and may preferably be formed integrally with the disk portion 3211.

The height of the border wall portion 3212 may be set according to the size of the ferrite core 323 provided in the internal space of the core frame 321, etc.

Meanwhile, on the outside of the border wall portion 3212, a plurality of fastening tabs 3214 may be provided for fixing the core frame 321 to the above-described second mounting plate 42, and each fastening tab 3214 has A fastening hole through which a fastener such as a screw bolt extends may be formed.

As will be described later, the main plate 421 of the second mounting plate 42 may be provided with a bolt hole 4214 into which a screw bolt is screwed at a position corresponding to the fastening hole of the fastening tab 3214.

Additionally, a guide protrusion 3215 that protrudes outward in the radial direction from the edge wall portion 3212 may be provided at a position outside the edge wall portion 3212 and spaced in the circumferential direction from the fastening tab 3214.

The guide protrusion 3215 represents a state in which the core frame 321 is temporarily assembled in the correct position before the plurality of fastening tabs 3214 described above are fixed to the main plate 421 of the second mounting plate 42 through screw bolts. It plays a role in maintaining it.

As shown by way of example, the guide protrusion 3215 may be provided in a semi-cylindrical shape corresponding to the shape of the guide hole 4215 into which the lower end is inserted. Through this, it is possible to secure the maximum connection area and connection strength to the edge wall portion 3212 of the core frame 321.

In order to effectively prevent the core frame 321 from being deviated from its correct position during the fastening process of the core frame 321 using screw bolts, as shown in the illustrated embodiment, the guide protrusions 3215 are a pair. It can be provided with

When the guide protrusions 3215 are provided as a pair, each guide protrusion 3215 is positioned symmetrically around the mounting hole 3211a formed in the center of the disk portion 3211 of the core frame 321. can be formed in

Meanwhile, on the outside of the edge wall portion 3212, a cable guides the lead wire of the plate temperature sensor 61 and the lead wire 322a of the working coil 322 to extend to the outside of the core frame 321. The holder 3212a may be provided integrally.

Meanwhile, the second mounting plate 42 includes a main plate 421 forming the bottom surface of the second mounting plate 42, and a reinforcement plate 422 bent upward from the outer edge of the main plate 421. ) may be configured to include.

As described above, the main plate 421 of the second mounting plate 42 on which the core frame 321 is seated and fixed stably supports the bottom of the core frame 321 and is attached to the bottom of the core frame 321. It may be provided in the form of a plate with a flat surface parallel to the horizontal direction to maximize the contact area.

At this time, although not shown, a bead portion may be added to the main plate 421 to supplement rigidity to prevent deformation due to the load of the second heating unit 32 itself and the load of the object to be heated.

The reinforcement plates 422 of the second mounting plate 42 may be formed integrally with each other by bending upward from the main plate 421 (U-D direction).

As shown, reinforcement plates 422 may be formed on the left and right edges and rear edges of the main plays, which are generally formed in a square shape.

Through these reinforcing plates 422, the overall rigidity of the first mounting plate 41 and the second mounting plate 42 can be reinforced. That is, the bending or damage of the plate-shaped main plate 421 due to the weight and external force of the internal components including the second heating unit 32 can be minimized through the reinforcement plate 422.

Meanwhile, as shown in FIGS. 4 and 5, the main plate 421 of the second holding plate 42 may be provided with a plurality of open holes formed by drilling in the vertical direction.

Among the plurality of open holes, some are insertion holes through which the pair of lead wires 322a and the lead wire (not shown) of the temperature sensing unit 60 can extend, and are covered at positions spaced apart from the core frame 321. It may include an insertion hole into which the support member 424 supporting the lower side of the plate 20 is inserted.

More specifically, the plurality of insertion holes include a first insertion hole 4211 through which one of the pair of leader lines passes, and a second insertion hole 4212 through which the other one of the pair of leader lines 322a passes. and a third insertion hole 4213 through which the lead wire of the temperature sensing unit 60 passes.

The pair of lead wires 322a and the lead wire of the temperature sensing unit 60 extend downward (D-direction) through these insertion holes 4211, 4212, and 4213, respectively, to form the control circuit board module 80 described above. ) can be electrically connected to.

Meanwhile, some of the plurality of open holes may be bolt holes 4214 through which the aforementioned screw bolts pass.

As described above, the bolt hole 4214 is an open hole through which a screw bolt fastening the second mounting plate 42 to the supporting flange 130 of the case 10 passes, and the core of the second heating unit 32 It may include an open hole for fastening the fastening tab 3214 provided on the frame 321 to the second mounting plate 42.

Meanwhile, another part of the plurality of open holes may be a guide hole 4215 into which the lower end of the guide protrusion 3215 of the core frame 321 is inserted, as described above.

In addition, another part of the plurality of open holes may be a plurality of ventilation holes that communicate the upper space and the lower space of the main plate 421 of the second mounting plate 42.

As described above, the third heating unit 33 is disposed behind the second mounting plate 42 at the rear.

Additionally, the second mounting plate 42 must be arranged to remain separated from the partition wall 332 disposed at the rear.

Therefore, since the second mounting plate 42 must remain separated from the partition wall 332 and cannot extend rearward beyond the partition wall 332, the second mounting plate 42 as shown in FIG. 3 It is bound to be significantly smaller in size compared to .

Therefore, the second mounting plate 42 is compared to the first mounting plate. The heat dissipation area for dissipating heat generated in the working coil 322 and heat transferred from the object to be heated may be insufficient.

In addition, the second mounting plate 42 has insufficient free space on the lower side compared to the first mounting plate 41, so a separate mounting plate such as the blowing module 90 disposed on the lower side of the first mounting plate 41 is installed. It has a structure in which it is difficult to place the blowing means.

The present invention provides a plurality of ventilation holes as a means to prevent overheating of the working coil 322 due to structural constraints of the second mounting plate 42 and prevent thermal damage to the second indicator module 842. It may be provided on the main plate 421 of the second mounting plate 42.

Among the plurality of ventilation holes, the main ventilation hole 4218, which has the largest size, may be arranged to be substantially concentric with the mounting hole of the core frame 321 described above.

Figure 5 shows an embodiment in which the main ventilation hole 4218 is provided as a circular opening, but the present invention is not limited to this and may be formed in various different shapes.

Small ventilation holes smaller than the main ventilation hole 4218 may be formed between the core frame 321 and the reinforcement plate 422 of the second mounting plate 42.

Exemplarily, these ventilation holes may be provided as circular openings with a circular cross-section.

The plurality of ventilation holes may further include a slit-type long hole 4216 having a rectangular shape and formed at a position spaced apart from the above-described main ventilation hole toward the front edge of the main plate 421.

The slit-shaped long hole 4216 may serve to communicate the upper and lower parts of the main plate 421, like other ventilation holes described above.

Therefore, as described above, some of the airflow of external air supplied from the blowing module 90 can pass through the lower part of the first mounting plate 41 and flow to the lower side of the second mounting plate 42, and the main ventilation It can flow to the upper side of the second mounting plate 42 through at least one of the hole 4218, the slit-shaped long hole 4216, and other ventilation holes.

Furthermore, as described later, the slit-type long hole 4216 allows the heat generated in the working coil 322 and the heat generated in the heated object to connect the core frame 321 and the main plate 421 of the second mounting plate 42. It can also serve to minimize conduction to the second indicator module 842, which will be described later.

That is, the slit-shaped long hole 4216 can also serve to block or minimize heat conduction to prevent heat damage to the second indicator module 842.

To this end, as shown, the slit-shaped long hole 4216 may be a rectangular opening arranged to divide the core frame 321, which serves as a heat source, and the second indicator module 842.

The detailed configuration of the slit-type long hole 4216 that performs a heat conduction blocking function will be described later with reference to FIGS. 6 to 8.

Meanwhile, a second indicator module 842 may be disposed on one edge of the second mounting plate 42 to visually display whether or not the second heating unit 32 is operating or in an operating state.

4 and below show an embodiment in which the second indicator module 842 is disposed on the front edge side of the main plate 421 constituting the second mounting plate 42. The present invention is not limited to this, but for convenience, the following will be described based on an embodiment in which the second indicator module 842 is disposed and fixed to the front edge of the main plate 421.

As shown in FIG. 5, the second indicator module 842 includes an LED circuit board 8421 on which a plurality of LED elements 8423 are mounted, and an LED circuit board 8421 on which the LED circuit board 8421 is installed. It may be configured to include a supporting circuit board holder 8422.

The LED circuit board 8421 extends linearly so that a plurality of LED elements 8423 can be linearly arranged in a row, and may be formed in a rectangular shape with the left and right directions being the longitudinal directions.

The plurality of LED elements 8423 light up when the second heating unit 32 operates, thereby visually informing the user whether the heating unit 30 is operating and its operating state.

Additionally, the second indicator module 842 may change the lighting shape and color of the plurality of LEDs to inform the user of the operation and operating state of the second heating unit 32.

The LED circuit board 8421 needs to be placed as close to the bottom of the cover plate 20 as possible so that the light generated when the plurality of LED elements 8423 are turned on can be effectively exposed to the outside through the cover plate 20. There is.

For this purpose, the LED circuit board 8421 may be configured to be disposed on the upper side of the circuit board holder 8422.

As described above, the circuit board holder 8422 fixes the LED circuit board 8421 and serves to support the LED circuit board 8421.

In order to effectively protect the LED circuit board 8421 from external shock and electrically insulate the LED circuit board 8421, the circuit board holder 8422 may be manufactured by injection molding a plastic material.

Meanwhile, while the LED circuit board 8421 is fixed, the circuit board holder 8422 may be configured to be directly connected to and supported by the front edge of the main plate 421 of the second mounting plate 42.

Here, the directly connected and supported structure is, unlike the prior art, a structure for connecting and supporting the circuit board holder 8422 without having an intermediate connecting member such as a separate additional bracket. This means that it is formed directly on the second mounting plate 42.

As a structure for direct connection and support, an indicator connection portion 423 may be provided at the front edge of the main plate 421 of the second mounting plate 42.

As shown, the indicator connection portion 423 may be formed by cutting a portion of the front edge of the main plate 421 and then bending it into an L shape.

The circuit board holder 8422 can be fastened to the indicator connection part 423 through screw bolts after the indicator connection part 423, which is bent in an L shape, is simply fitted.

Although not shown, a slot into which the indicator connection part 423 can be inserted may be formed on the rear side of the circuit board holder 8422.

Additionally, as shown, connection tabs through which screw bolts pass may be formed on both ends of the circuit board holder 8422.

Therefore, the second indicator module 842 of the electric range 1 according to an embodiment of the present invention can be directly supported and fixed to the second mounting plate 42 without a separate intermediate connecting member, so compared to the prior art. Manufacturing costs and manufacturing man-hours can be significantly minimized.

[Detailed configuration of slit-type long hole]

Hereinafter, with reference to FIGS. 6 to 8, the detailed configuration of the slit-shaped long hole 4216 provided in the second mounting plate 42 of the electric range 1 according to an embodiment of the present invention will be described.

As described above, the second indicator module 842 is configured to be directly supported and fixed to the front edge of the main plate 421 of the second mounting plate 42 without a separate intermediate connecting member.

Therefore, it is highly likely that the heat generated from the working coil 322 wound on the core frame 321 and the heat generated from the heated object will be conducted directly to the second indicator module 842 through the second mounting plate 42. , there is a high possibility that the LED circuit board 8421 of the second indicator module 842 will be damaged by the conducted heat.

As a means to prevent damage to the LED circuit board 8421 and the LED element 8423 due to heat conduction, the second mounting plate 42 constituting the electric range 1 according to an embodiment of the present invention is used. The main plate 421 is formed at a position spaced apart from the second indicator module 842 toward the second heating unit 32, and a slit-shaped long hole is formed by drilling the main plate 421 in the vertical direction. 4216) may be provided.

That is, as shown, the slit-shaped long hole 4216 may be a rectangular opening arranged to divide the core frame 321, which serves as a heat source, and the second indicator module 842.

In order to maximize the heat conduction blocking effect, the slit-type long hole 4216 may be formed continuously and long as it progresses from one end to the other end.

In more detail, as shown in FIGS. 5 and 6, the slit-type long hole 4216 may be provided to have a straight shape extending parallel to the second indicator module 842.

At this time, the front-to-back distance between the slit-type long hole 4216 and the second indicator module 842, and more specifically, the front-to-back distance between the slit-type long hole 4216 and the LED circuit board 8421, is the slit-type long hole 4216. ) can be maintained constant while proceeding along the longitudinal direction.

However, as will be described later, if the front-to-back distance is below a predetermined level, that is, if the slit-type long hole 4216 is formed too close to the second indicator module 842, the heat conduction blocking effect may be halved.

Therefore, the front-to-back spacing between the slit-shaped long hole 4216 and the second indicator module 842 can be set to be at least a predetermined level, and preferably between the slit-shaped long hole 4216 and the second indicator module 842. The front-to-back spacing may be set to be much larger than the front-to-back spacing between the slit-shaped long hole 4216 and the core frame 321 of the second heating unit 32.

That is, the slit-shaped long hole 4216 may be disposed closer to the second heating unit 32 than the second indicator module 842, and in more detail, as shown, the slit-shaped long hole 4216 is used for the second heating unit. It may be placed in a position that is at least partially obscured by the core frame 321 of the unit 32.

This position is between the fastening tab 3214 and the guide projection 3215 provided on the core frame 321, and the slit-shaped long hole 4216 is located between the fastening tab 3214 and the guide projection 3215 of the core frame 321. It can also be seen as extending through the space.

Therefore, if the slit-shaped long hole 4216 is arranged in such a way that it is at least partially covered by the core frame 321 of the second heating unit 32, a part of the slit-shaped long hole 4216 is connected to the main plate 421. The upper part may be exposed, and the remaining part may be obscured by the core frame 321.

Through this, similar to the above-described main ventilation hole, not only the inside and outside of the inner space of the core frame 321 communicate with each other by the slit-type long hole 4216, but also the upper and lower parts of the main plate 421 communicate with each other. This allows the cooling effect of the working coil 322 to be further improved.

Meanwhile, based on the illustrated embodiment, the slit-shaped long hole 4216 is formed continuously long along the direction crossing the main plate 421 of the second mounting plate 42 in the left and right directions to maximize the heat conduction blocking effect. It is structured as possible.

It can be seen that the front side and the rear side are divided and divided based on the slit-type long hole 4216 according to the direction in which the slit-type long hole 4216 extends.

Therefore, if the slit-shaped long hole 4216 is formed excessively long, the strength and rigidity of the second mounting plate 42 and the main plate 421 may be seriously reduced.

In order to prevent such a decrease in strength and rigidity, the size of the slit-type long hole 4216 is configured to be maintained below a predetermined level.

More specifically, based on the illustrated embodiment, the left and right length (L1) of the slit-type long hole 4216 is such that the distance from the right end of the slit-type long hole 4216 to the right reinforcement plate 422 is 35 mm or more, and the slit-type long hole 4216 has a distance of 35 mm or more. The distance from the left end of the long hole 4216 to the left reinforcement plate 422 may be limited to 35 mm or more.

Additionally, as shown in FIG. 6, the left-right length L1 of the slit-shaped long hole 4216 may be limited to be smaller than the left-right length L3 of the LED circuit board 8421.

Additionally, as shown in FIG. 6, the length L1 of the slit-shaped long hole 4216 in the left and right directions may be limited to a size smaller than the outer diameter of the core frame 321.

However, the left-right length L1 of the slit-type long hole 4216 may be larger than the radius of the core frame 321.

That is, the left-right length (L1) of the slit-type long hole 4216 is formed to have a value selected from the range between the left-right length (L3) of the LED circuit board 8421 and the outer diameter of the core frame 321. As much as possible, it is possible to prevent a decrease in the strength of the second mounting plate 42 and the main plate 421.

Meanwhile, like the left-right length L1, the front-to-back width W1 of the slit-shaped long hole 4216 may also be limited to a predetermined range.

More specifically, based on the illustrated embodiment, the front-to-back width (W1) of the slit-type long hole 4216 may be limited to a numerical range of 4 mm to 8 mm.

Setting the front-to-back width (W1) of the slit-type long hole 4216 to 4 mm or more means that if it is less than 4 mm, the hole processing cost for a fine width shape increases, and the formation and processing of the bending portion 4217, which will be described later, is easy. Because they don't.

In addition, setting the front-to-back width (W1) of the slit-type long hole 4216 to 8 mm or less means that if it exceeds 8 mm, the front-to-back width (W1) becomes excessively large, and the strength of the main plate 421 is too low. Because there is a possibility that you will lose.

Meanwhile, as a means to prevent a decrease in strength and rigidity due to the formation of the slit-shaped long hole 4216, as shown in Figures 7 and 8, one edge or the other edge constituting the long side of the slit-shaped long hole 4216 At least one of them may be provided with a plate-shaped bending portion 4217 that is formed by bending downward.

First, referring to FIG. 7, an embodiment is shown in which a bending portion 4217 is provided on the rear edge formed at the rear of the two long sides of the slit-shaped long hole 4216, and the bending portion 4217 is not provided on the front edge. there is.

The bending portion 4217 may be formed by cutting or cutting the main plate 421 into a U-shape and then bending it downward when manufacturing the slit-shaped long hole 4216.

Bending in the downward direction is to avoid interference with the core frame 321 disposed on the upper side.

Accordingly, the height H2 at which the bending portion 4217 protrudes from the lower surface of the main plate 421 may be smaller than or equal to the front-to-back width W1 of the slit-shaped long hole 4216. In addition, in order to minimize the deformation of the slit-type long hole 4216 during bending and minimize the load during processing, the left-right length (L2) of the bending part should be set smaller than the left-right length (L1) of the slit-type long hole 4216. You can.

Meanwhile, referring to FIG. 8, in another embodiment, a first bending portion is provided on the rear edge formed at the rear of the two long sides of the slit-shaped long hole 4216, and the second bending portion 4217b is not provided on the front edge. An example is shown.

Similar to the embodiment shown in FIG. 7, the first bending portion 4217a and the second bending portion 4217b are formed by cutting the main plate 421 into an H-shape when manufacturing the slit-type long hole 4216. It can be formed by cutting and then bending in the downward direction.

Therefore, the sum of the height H21 at which the first bending part 4217a protrudes from the lower surface of the main plate 421 and the height H22 at which the second bending part 4217b protrudes from the lower surface of the main plate 421 is , it may be smaller than or equal to the front-to-back width (W1) of the slit-shaped long hole 4216.

Meanwhile, in Figure 8, the height H21 at which the first bending part 4217a protrudes from the lower surface of the main plate 421 and the height H22 at which the second bending part 4217b protrudes from the lower surface of the main plate 421 are shown. ) are shown as being set to be equal to each other. However, the present invention is not limited to this, and the first bending part 4217a and the second bending part 4217a are formed by setting the protrusion height higher for parts that require more strength or rigidity supplementation or parts where a larger load is expected to be applied. It is also possible to set the size and shape of the bending portion 4217b differently, and this will naturally be considered to fall within the scope of the present invention.

Hereinafter, with reference to FIGS. 9 to 12, test results for experimental examples provided with slit-type long holes according to the present invention and comparative examples without slit-type long holes according to the prior art will be described.

First, Figure 9 is a distribution chart showing the temperature measurement results for a comparative example provided with a second mounting plate without a slit-type long hole according to the prior art.

Figure 10 shows the temperature measurement results for the first experimental example in which a slit-type long hole is provided in the second mounting plate, and the slit-type long hole is formed close to the second indicator module in an exposed state without being covered by the core frame 321. This is a distribution chart showing .

11 and 12 show that a slit-type long hole is provided in the second mounting plate, and the slit-type long hole is disposed closer to the core frame 321 than the second indicator module with the core frame 321 partially covered. This is a distribution chart showing the temperature measurement results for experimental examples. However, Figure 11 shows the test results for the second experimental example provided with a slit-shaped long hole with a front-to-back width of 4 mm, and Figure 12 shows the test results for the third experimental example provided with a slit-type long hole with a front-to-back width of 8 mm. It is a result.

In addition to the conditions described above, the second mounting plate, second heating unit, and second indicator module were applied, with all other conditions set to be the same.

Additionally, in order to measure the amount of heat transfer to the LED circuit board of the second indicator module under the same heat load conditions, an experiment was conducted under the same heating conditions of the working coil. For example, the temperature of the working coil was maintained at 170°C during the experiment.

The surface temperature of the LED circuit board was measured at three locations to check the location-specific deviation of the conduction heat transferred to the LED circuit board under the same heating conditions of the working coil.

The table below is a comparison table summarizing the temperature measurement results for each comparative example and each experimental example.

<Comparison table of temperature measurement results>
Measurement location on LED circuit board

Left position
middle position Right position Comparative example
78.9
85.3 87.5 Experiment 1
80.8
85.5 86.6 Second experiment example
76.5
82.5 85.5 Third experiment example
77.9
82.8 85.7

As can be seen in the table above, it was confirmed that the measured temperature was generally highest at the right side of the LED circuit board, and that the temperature gradually decreased as it moved to the left.

This means that the first mounting plate is disposed adjacent to the right side of the second mounting plate, and the first mounting plate can receive a cooling effect by the airflow of external air supplied by the blowing module 90 disposed at the bottom. It is analyzed that this is because the right side of the second mounting plate can receive a cooling effect, albeit slightly, from the airflow of external air.

Meanwhile, when comparing the experimental results of the first experimental example and the comparative example, it was found that there was almost no temperature difference at each location. Rather, it was confirmed that in the left position, the measurement results according to the first experimental example showed a higher temperature value than the comparative example.

Therefore, it can be analyzed that if a slit-type long hole is formed too close to the LED circuit board as in the first experimental example, the heat conduction blocking effect is almost non-existent.

It was confirmed that the second and third experimental examples showed almost similar experimental results. However, it was clearly confirmed that the temperature values were significantly lower at each measurement location compared to the comparative example and the first experimental example.

Through this, it can be clearly confirmed experimentally that the second and third experimental examples, in which the slit-type long hole configuration is applied in one embodiment of the present invention, have a significantly superior heat transfer blocking effect compared to the comparative example and the first experimental example. there was.

As described above, the present invention has been described with reference to the illustrative drawings, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that transformation can occur. In addition, although the operational effects according to the configuration of the present invention were not explicitly described and explained while explaining the embodiments of the present invention above, it is natural that the predictable effects due to the configuration should also be recognized.

1: Electric range 10: Case
20: cover plate 30: heating unit
31: first heating unit 32: second heating unit
33: third heating unit 40: holding plate
42: second mounting plate 421: main plate
422: Reinforcement plate 4216: Slit-type long hole
842: Second indicator module

Claims (18)

A cover plate on which the object to be heated is seated on the upper side;
a heating unit disposed below the cover plate and generating heat in the object to be heated through an electromagnetic field generated from a working coil;
A mounting plate disposed below the heating unit and on which the heating unit is fixed; and
An indicator module attached to one edge of the mounting plate and visually indicating whether or not the heating unit is operating or in an operating state;
Including,
An electric range wherein the mounting plate is formed at a position spaced apart from the indicator module toward the heating unit, and is provided with a slit-type long hole formed by perforating the mounting plate in an upward and downward direction.
In paragraph 1:
The indicator module is,
LED circuit board on which multiple LED elements are mounted; and
A circuit board holder on which the LED circuit board is installed;
Including,
The circuit board holder is an electric range that is directly fixed to one edge of the mounting plate.
In paragraph 2:
The LED circuit board has a rectangular shape that extends linearly so that the plurality of LED elements can be linearly arranged,
The slit-shaped long hole is a rectangular opening extending parallel to the LED circuit board.
In paragraph 3:
An electric range in which the length of the slit-type long hole is smaller than the length of the LED circuit board.
In paragraph 3:
An electric range in which the gap between the LED circuit board and the slit-shaped long hole is maintained constant while moving along the longitudinal direction of the slit-shaped long hole.
In paragraph 3:
The slit-shaped long hole is an electric range formed closer to the heating unit than the LED circuit board in the horizontal direction.
In paragraph 6:
The heating unit includes a cylindrical core frame on which the coil is wound on an upper side,
An electric range in which the length of the slit-type long hole is smaller than the outer diameter of the core frame.
In paragraph 7:
An electric range in which the length of the slit-type long hole is larger than the radius of the core frame.
In paragraph 7:
The slit-shaped long hole is at least partially covered by the core frame when viewed from above the core frame.
In paragraph 7:
The heating unit,
A fastening tab formed integrally with the outer peripheral surface of the core frame and fastened to the mounting plate through a separate fastener; and
a guide protrusion formed at a position spaced apart from the fastening tab in the circumferential direction and maintaining the provisionally assembled state of the core frame before the fastener is coupled;
Including,
The slit-shaped long hole is an electric range extending between the fastening tab and the guide protrusion.
In paragraph 3:
An electric range having a plate-shaped bending portion formed by bending the mounting plate in a downward direction and extending along the longitudinal direction of the slit-shaped long hole on at least one edge or the other edge constituting the long side of the slit-shaped long hole. .
In paragraph 11:
An electric range in which the height at which the bending part protrudes from the lower side of the mounting plate is smaller than or equal to the width of the slit-type long hole.
In paragraph 11:
The bending part,
a plate-shaped first bending portion provided at one edge of the slit-shaped long hole and formed by bending the mounting plate in a downward direction; and
a plate-shaped second bending portion provided on the other edge of the slit-shaped long hole and formed by bending the mounting plate in a downward direction;
Electric range including.
In paragraph 13:
The sum of the height at which the first bending portion protrudes from the lower side of the mounting plate and the height at which the second bending portion protrudes from the lower side of the mounting plate is smaller than or equal to the width of the slit-type long hole. .
In paragraph 14:
An electric range in which the height at which the first bending portion protrudes from the lower side of the mounting plate and the height at which the second bending portion protrudes from the lower side of the mounting plate are equal to each other.
In paragraph 1:
A resistance heating unit disposed at the bottom of the cover plate and spaced rearward from the heating unit and heating the object to be heated through high heat generated from the heating wire: and
a partition that isolates and spatially separates the resistance heating unit from the heating unit;
It further includes,
The partition wall is an electric range arranged in a state separated from the mounting plate.
In paragraph 16:
The bulkhead is,
First and second panels each arranged in an L shape to surround the resistance heating unit; and
Corner portions that have one end integrally connected to the first panel, the other end integrally connected to the second panel, and extending in a direction intersecting the first panel and the second panel, respectively;
Electric range including.
In paragraph 17:
A switching element that generates high-frequency power and supplies it to the working coil; and
a blowing module that generates an airflow of external air for cooling the switching element;
It further includes,
An electric range in which some of the airflow of external air generated through the blowing module flows to the lower side of the mounting plate through the edge of the partition wall.

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