WO2021187688A1

WO2021187688A1 - Can heating device

Info

Publication number: WO2021187688A1
Application number: PCT/KR2020/011487
Authority: WO
Inventors: 김완수; 오두용; 문현욱; 김양경
Original assignee: 엘지전자 주식회사
Priority date: 2020-03-20
Filing date: 2020-08-27
Publication date: 2021-09-23

Abstract

A can heating device is disclosed. The can heating device has working coils wound around the outer surface of a bobbin, and thus an interval between a can and the working coils may be reduced. In addition, the can heating device has a temperature sensor disposed at the lower part of a lower plate, and thus the temperature sensor may measure the temperature of the bottom surface of the can. In addition, the can heating device has cut parts formed in the outer surface of the bobbin, and thus rollers on the outside of the bobbin may make contact with the can which is received inside the bobbin.

Description

can heating device

The present invention relates to a can heating apparatus having a simple and slim structure and heating cans containing beverages in a short time.

A heating device for beverage cans used in convenience stores, etc. accommodates a plurality of beverage cans therein, and heats the accommodated beverage cans to a predetermined temperature to increase or maintain the temperature of the beverage cans. The user takes out the beverage can from the heating device and drinks the beverage contained in the beverage can.

On the other hand, it is important for the heating device of the beverage can to quickly heat the beverage can to a temperature desired by the user. For this purpose, a temperature sensor or the like for measuring the temperature of the beverage can is used.

As prior art related thereto, there are US registered patents (US9674900) and Japanese registered patents (JP3259808 and JP3706928). Hereinafter, the prior art will be described as follows.

1 is a view showing the structure of a conventional induction heating device for heating a beverage can.

For reference, FIG. 1 is an extract of FIG. 1 of US registered patent US9674900. Reference numerals shown in FIG. 1 limit only the components of FIG. 1 .

Referring to FIG. 1 , a resealable can 1 is accommodated in a can holder 6 , and a heating coil 9 is disposed on a side surface of the can holder 6 . The heating coil 9 heats the can 1 accommodated in the can holder 6 . A motor 7 is connected to the bottom 11 of the can holder 6, and based on the driving of the motor 7, the can holder 6 rotates about the central axis A, and thus the can ( 1) is rotated. The radiation thermometer 10 measures the temperature of the cap 3 of the can 1 , and when the measured temperature is the set temperature, the can holder 6 and the can 1 stop rotating.

However, in the prior art of FIG. 1 , the heating coil 9 and the can 1 are somewhat far apart, so that the temperature of the can 1 does not increase quickly. In addition, there is a risk that the induction heating device 4 itself will vibrate as the can holder 6 itself rotates. In addition, since the measured temperature is not the temperature of the contents contained in the can 1 but the temperature of the cap 3 , the temperature of the contents contained in the can 1 cannot be accurately measured.

Figure 2 is a view showing the structure of another conventional beverage can heating device.

For reference, FIG. 2 is an extract of FIG. 1 of Japanese registered patent JP3259808. Reference numerals shown in FIG. 2 limit only the components of FIG. 2 .

Referring to FIG. 2 , a cylindrical can guide 4 is disposed on the rotating table 5 , and the can 3 is accommodated in a space formed by the can guide 4 and the rotating table 5 . A heating coil 2 is disposed adjacent to the side of the can guide 4 , and the heating coil 2 heats the accommodated can 3 . A rotary table motor 6 is connected to the lower portion of the rotary table 5 , and the rotary table 5 rotates based on the driving of the rotary table motor 6 , and accordingly the can 3 rotates. The radiation temperature sensor 7 measures the temperature of the side of the can 3 . The barcode reader 19 identifies the barcode including information such as the contents, price, and date of manufacture of the can 3 , and the manager manages the can 3 using the information included in the barcode.

However, even in the case of the prior art of FIG. 2 , the heating coil 2 and the can guide 4 are somewhat far apart, so that the temperature of the can 3 does not increase quickly. In addition, as the rotating table 5 itself rotates, there is a risk that the main body 1 is shaken.

In addition, in general, the side of the container of the can 3 is painted with a specific material and color for identification with other cans. However, since the material of the container of the can 3 is different from that of the coating material, the prior art of FIG. 2 cannot accurately measure the temperature of the container and the contents of the can 3 . In particular, when the color of the coating material is a color with a large reflectance, the temperature of the container and contents of the can 3 cannot be measured more accurately.

Figure 3 is a view showing the structure of another conventional beverage can heating device.

For reference, FIG. 3 is an extract of FIG. 1 of Japanese registered patent JP3706928. Reference numerals shown in FIG. 3 limit only the components of FIG. 3 .

Referring to FIG. 3 , the can 50 containing the beverage 5 is horizontally disposed, and the heating coil 1 is disposed adjacent to the can 50 . The heating coil 1 heats the can 50 . The side of the can 50 is in contact with the

rollers

2 and 3, and among the

contacted rollers

2 and 3, the roller 2 is connected to the motor 4, and based on the operation of the

rollers

2 and 3, The can 50 rotates. As the can 50 rotates, the temperature of the contents contained in the can 50 rapidly increases. The temperature sensor 7 measures the temperature of the tip of the can 50 . The heating time of the can 50 is determined based on the measured temperature.

However, the prior art of FIG. 3 has a problem in that the

rollers

2 and 3 and the heating coil 1 are complicatedly arranged around the can 50 . In addition, since the

rollers

2 and 3 are always disposed in contact with the side surface of the can 50 , there is a disadvantage in that the user experiences inconvenience when the can 50 is drawn in and out. In addition, since the temperature is measured from the side of the can 50 , the temperature of the container and contents of the can 50 cannot be accurately measured.

An object of the present invention is to provide a can heating apparatus having a simple and slim structure.

It is also an object of the present invention to provide a can heating device capable of increasing the temperature of the contents inside the can in a short time.

Another object of the present invention is to provide a can heating apparatus capable of accurately measuring the temperature of a can and the contents of the can.

It is also an object of the present invention to provide a can heating apparatus that facilitates drawing in and taking out of a can.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the examples of the present invention.

In the can heating apparatus according to an embodiment of the present invention, the gap between the can and the working coil can be reduced by winding the working coil on the outer surface of the bobbin.

In the can heating apparatus according to an embodiment of the present invention, a temperature sensor is disposed under the lower plate, so that the temperature sensor can measure the temperature of the bottom surface of the can.

The can heating apparatus according to an embodiment of the present invention may form a cutout formed on the outer surface of the bobbin, thereby bringing the roller outside the bobbin into contact with the can accommodated in the bobbin.

The can heating apparatus according to an embodiment of the present invention may rotate the accommodated can by using a roller.

Can heating apparatus according to an embodiment of the present invention, a can is accommodated therein, a bobbin having a plurality of cutouts formed on the outer surface, wound on the outer surface of the bobbin, at least one walking for heating the accommodated can A coil, a plurality of rollers contactable with the side surface of the accommodated can through the plurality of cutouts, and a temperature sensor for sensing a temperature of a bottom surface of the accommodated can, based on rotation of at least one of the plurality of rollers Thus, the accommodated can rotates.

According to the present invention, the structure of the can heating apparatus can be manufactured in a simple and slim manner by winding a heating coil on the outer surface of the bobbin in which the can is accommodated and forming a cutout into which a roller can be inserted.

According to the present invention, by reducing the gap between the can and the working coil, it is possible to increase the heating efficiency of the can and increase the temperature of the can in a short time.

According to the present invention, by measuring the temperature of the bottom surface of the can, it is possible to accurately measure the temperature of the container of the can and the contents of the can.

According to the present invention, by bringing a roller disposed on the outside of the bobbin into contact with the can accommodated inside the bobbin, the can can be rotated while stably fixed.

According to the present invention, by rotating the accommodated can, it is possible to quickly increase the temperature of the can.

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 to 3 are views showing the structure of a conventional can heating apparatus.

4 is a view showing a schematic structure of a can heating apparatus according to an embodiment of the present invention.

5 is a perspective view of an induction heating device according to an embodiment of the present invention.

6 is an exploded perspective view of an induction heating device according to an embodiment of the present invention.

7 is a perspective view illustrating a shape in which a can is accommodated inside an induction heating apparatus according to an embodiment of the present invention.

8 is a plan view illustrating a concept in which a can is drawn into the inside of an induction heating device according to an embodiment of the present invention.

9 is a circuit diagram illustrating a schematic structure of a driving circuit unit according to an embodiment of the present invention.

10 is a flowchart of a control method of a can heating apparatus according to an embodiment of the present invention.

The above-described objects, features and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains 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 a known technology 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 accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

In the following, that an arbitrary component is disposed on the "upper (or lower)" of a component or "upper (or below)" of a component means that any component is disposed in contact with the upper surface (or lower surface) of the component. Furthermore, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Also, when it is described that a component is "connected", "coupled" or "connected" to another component, the components may be directly connected or connected to each other, but other components are "interposed" between each component. It is to be understood that “or, each component may be “connected,” “coupled,” or “connected” through another component.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

4 is a view showing a schematic structure of a can heating apparatus 100 according to an embodiment of the present invention.

Referring to FIG. 4 , the can heating apparatus 100 according to an embodiment of the present invention includes a housing 200 , a cover 300 , and an induction heating apparatus 400 .

Meanwhile, components included in the can heating apparatus 100 are not limited to the embodiment illustrated in FIG. 4 , and some components may be added, changed, or deleted as necessary.

The housing 200 forms the body of the can heating device 100 , and the induction heating device 400 is located in the inner space of the housing 200 . The housing 200 may be variously modified within the range for accommodating the can heating device 100, but in the embodiment of the present invention, for convenience of description, the components shown in FIG. 4 will be described as an example. .

The induction heating device 400 accommodates the can 500 and heats the accommodated can 500 . In addition, the induction heating device 400 rotates the accommodated can 500 about a central axis.

Meanwhile, referring to FIG. 4 , the induction heating device 400 may be inclined at a predetermined angle in the vertical direction of the horizontal line to be disposed inside the housing 200 . However, the present invention is not limited thereto, and the induction heating device 400 may be disposed inside the housing 200 in various postures. For example, the induction heating device 400 may be disposed vertically or horizontally inside the housing 200 .

A portion of the outer surface of the housing 200 is opened, and the cover 300 is installed in the open portion of the housing 200 . The cover 300 can be implemented in various modifications within the technical concept of being installed so as to be able to open and close a part of the outer surface of the housing 200 .

The cover 300 may be disposed to face the open end of the induction heating device 400 . When the cover 300 is opened, the can 500 may be accommodated in the induction heating device 400 . When the insertion of the can 500 is completed, the cover 300 may be closed.

As mentioned above, the accommodated can 500 may be heated simultaneously with rotation.

Meanwhile, although not shown in FIG. 4 , the can heating apparatus 100 may further include a control unit and an output unit.

The control unit performs overall control of heating the can 500 . That is, as will be described below, the control unit controls the operation of heating and rotating the can 500 .

The control unit refers to a processor-based device. In one example, the processor may include one or more of a central processing unit (CPU), an application processor, or a communication processor.

The output unit is a device for displaying specific information to a user. As an example, the output unit may include a display and a speaker. The display may include a liquid crystal display (LCD), a light emitting diode display (LED), an organic light emitting diode display (OLED), and the like, and is a device capable of displaying an image or an image frame to a user. The speaker outputs a sound signal to the user

Hereinafter, the structure and operation of the induction heating apparatus 400 for heating the can 500 will be described in detail with reference to FIGS. 5 to 10 .

5 is a perspective view of an induction heating device 400 according to an embodiment of the present invention. 6 is an exploded perspective view of an induction heating device 400 according to an embodiment of the present invention. 7 is a perspective view illustrating a shape in which the can 500 is accommodated in the induction heating apparatus 400 according to an embodiment of the present invention. 8 is a plan view illustrating a concept in which the can 500 is drawn into the inside of the induction heating device 400 according to an embodiment of the present invention.

5 to 8 , the induction heating apparatus 400 according to an embodiment of the present invention includes a bobbin 410 , a working coil 420 , and a lower plate 430 . ), a roller 440 , a shaft 450 , a motor 460 , a rotating plate 470 , a bearing 480 and a temperature sensor (490).

Hereinafter, the function of each component will be described in detail.

The bobbin 410 and the lower plate 430 perform a function of a can accommodating part for accommodating the can.

The inside of the bobbin 410 has an empty shape, but the inside shape of the bobbin 410 corresponds to the shape of the can 500 . As an example, since the can 500 generally has a cylindrical shape, the inside of the bobbin 410 may have a cylindrical shape. That is, the bobbin 410 has a cylindrical shape with an empty interior. However, the shape of the bobbin 410 is not limited to the shape shown in FIGS. 5 to 8 , and various shapes may be applied to the bobbin 410 .

The upper surface of the bobbin 410 is open, and the can 500 can be drawn in or drawn out through the open upper surface.

The lower surface of the bobbin 410 may also be opened. This is because the rotation plate 470 is disposed under the bobbin 410 . This will be described in more detail below.

A cutout 411 may be formed on the outer surface of the bobbin 410 . The cutout 411 may have a shape of a through hole. As an example, the shape of the cutout 411 may be a square shape. However, the present invention is not limited thereto, and the cutout 411 may have various shapes, such as a circular shape.

The number of cutouts 411 may be plural. Since the cutout 411 is formed in the bobbin 410 to bring the roller 440 into contact with the side surface of the can 500 , the number of cutouts 411 may be the same as the number of the rollers 440 .

The plurality of cutouts 411 may include one or more first cutouts 4111 and one or more second cutouts 4112 .

One or more first cutouts 4111 are disposed in the vertical direction in the first portion of the outer surface of the bobbin 410 . Each of the one or more first cutouts 4111 is a cutout for contacting one or more first rollers 441 described below to the side surface of the can 500 .

The one or more second cutouts 4112 are disposed in the vertical direction in the second portion of the outer surface of the bobbin 410 . Each of the one or more second cutouts 4112 is a cutout for contacting one or more second rollers 442 described below to the side surface of the can 500 .

Meanwhile, the bobbin 410 may be fixedly installed in the inner space of the housing 200 . That is, the bobbin 410 may not rotate.

The working coil 420 is wound on the outer surface of the bobbin 410 . The working coil 420 heats the can 500 accommodated in the bobbin 410 .

5 to 8 , the working coil 420 may be wound in a helical form on the outside of the outer surface of the bobbin 410 . However, the present invention is not limited thereto, and the working coil 420 may be wound inside the outer surface of the bobbin 410 or may be wound in a spiral form.

There may be one or more working coils 420 . As an example, the one or more working coils 420 include a first working coil WC1 wound on the upper portion of the bobbin 410 , a second working coil WC2 wound on the central portion of the bobbin 410 , and the bobbin 410 . It may include a third working coil WC3 wound under the. However, the present invention is not limited thereto, and the number of one or more working coils 420 may be one, two, or four or more. Hereinafter, for convenience of description, it is assumed that the number of the working coils 420 is three.

According to an embodiment of the present invention, the first to third working coils WC1 , WC2 , and WC3 may be connected in parallel. That is, the first to third working coils WC1 , WC2 , and WC3 may receive driving power separately from each other.

Meanwhile, according to another embodiment of the present invention, the first to third working coils WC1 , WC2 , and WC3 may be connected in series. In this case, one driving power may be supplied to all of the first to third working coils WC1 , WC2 , and WC3 .

By using one or more working coils 420 , it is possible to solve the problem that a portion of the accommodated can 500 is not heated. That is, by using one or more working coils 420 , the can 500 can be heated more evenly.

The working coil 420 may be disposed so as not to overlap the cutout 411 . That is, the one or more working coils 420 may be disposed so as not to interfere with the plurality of cutouts 411 . Accordingly, it is possible to prevent the roller 440 from contacting the working coil 420 .

The induction heating apparatus 400 may further include a driving circuit unit for driving the working coil 420 .

9 is a circuit diagram illustrating a schematic structure of a driving circuit unit 600 according to an embodiment of the present invention.

Referring to FIG. 9 , the driving circuit unit 600 may include a power supply unit 610 , a rectifier unit 620 , a DC link capacitor 630 , an inverter 640 , a resonance capacitor 650 , and an inverter control unit 660 . .

Here, the working coil 420 may include first to third working coils WC1, WC2, and WC3 connected in series, and for convenience of explanation, in FIG. WC2 and WC3) are expressed as one working coil 420 .

On the other hand, the driving circuit unit 600 may be variously modified within the range of heating the working coil 420, but in the embodiment of the present invention, for convenience of explanation, the components shown in FIG. 9 will be described as examples. do.

The power supply unit 610 outputs AC power. Specifically, the power supply unit 610 outputs AC power and provides it to the rectification unit 620 . The AC power may be commercial AC power.

The rectifying unit 620 rectifies the AC power supplied from the power supply unit 610 and converts it into DC power. As an example, the rectifier 620 may have a structure in which four diodes are connected in a full bridge form.

The DC power rectified by the rectifier 620 is provided to a DC link capacitor (ie, a smoothing capacitor) 630 , and the DC link capacitor 630 may reduce a ripple of the DC power.

For reference, the DC link capacitor 630 may be connected in parallel with the rectifier 620 and the inverter 640 . In addition, a voltage by DC power may be applied to one end of the DC link capacitor 630 , and the other end of the DC link capacitor 630 may be connected to ground.

Also, although not shown in FIG. 9 , the DC power rectified by the rectifying unit 620 may be provided to a filter unit (not shown) instead of the DC link 　 capacitor 630 , and the filter unit may include AC remaining in the corresponding DC power. ingredients can be removed. However, in the case of the induction 　 heating 　 device 400 according to an embodiment of the present invention, the DC power rectified by the rectifier 620 is provided to the DC link 　 capacitor 630 as an example.

The DC power rectified by the rectifier 620 and the DC link capacitor 630 is supplied to the inverter 640 .

The inverter 640 is connected to the working coil 420 , and applies a resonance current to the working coil 420 by performing a switching operation.

Specifically, the inverter 640 may receive DC power from the rectifier 620 and perform a switching operation. That is, the inverter 640 may receive DC power rectified by the rectifier 620 and reduced in ripple by the DC link capacitor 630 .

The inverter 640 may include a first switching element S1 and a second switching element S2 . Each of the first switching element S1 and the second switching element S2 may include a transistor, and the transistor may be an insulated gate bipolar mode transistor (IGBT).

Each of the first switching element S1 and the second switching element S2 may receive a switching control signal from the inverter controller 660 and perform a switching operation based on the provided switching control signal. For example, the first switching element S1 and the second switching element S2 may be alternately turned on and off based on a switching control signal.

In addition, a high-frequency alternating current (ie, resonant current) is generated by the switching operation of the first switching element S1 and the second switching element S2 , and the generated high-frequency alternating current is applied to the working coil 420 . do. An eddy current is generated between the working coil 420 and the can 500 by a high-frequency alternating current applied from the inverter 640 to the working coil 420 to heat the can 500 .

Meanwhile, the number of switching elements included in the inverter 640 is not limited to FIG. 9 . That is, the inverter 640 may include one or three or more switching elements.

The resonance capacitor 650 is connected to the working coil 420 . The resonance capacitor 650 may constitute a resonance circuit unit together with the working coil 420 .

When a voltage is applied by the switching operation of the inverter 640 , the resonance capacitor 650 starts resonance. When the resonance capacitor 650 starts resonance, the current flowing in the working coil 420 increases, and accordingly, an eddy current is induced into the can 500 disposed on the side of the working coil 420 .

The inverter controller 650 generates a switching control signal for controlling the switching operation of the inverter 640 and provides the generated switching control signal to the inverter 640 .

For example, the inverter control unit 650 generates a PWM control signal and provides it to the inverter 640 . The inverter 640 may perform a switching operation based on the PWM control signal.

Again, the structure of the induction heating device 400 will be described with reference to FIGS. 5 and 8 .

The lower plate 430 together with the bobbin 410 constitutes a can accommodating part. The lower plate 430 is disposed under the bobbin 410 . The lower plate 430 functions to support the accommodated can 500 under the bobbin 410 .

The lower plate 430 does not rotate and may be fixedly installed inside the housing 200 .

In a plan view, the lower plate 430 may have a circular shape. However, the present invention is not limited thereto, and various shapes of the lower plate 430 such as a rectangle may be used.

A hole 431 may be formed in the central portion of the lower plate 430 . As will be described below, the hole 431 serves to pass the temperature sensing signal radiated from the temperature sensor 490 .

The roller 440 rotates the can 500 accommodated in the can accommodating part or performs a function of supporting the accommodated can 500 . The roller 440 is located outside the bobbin 410 and may come into contact with the side of the can 500 accommodated through the cutout 411 .

As mentioned above, there may be a plurality of rollers 440 , and each of the plurality of rollers 440 may be in contact with the side of the can 500 accommodated through the plurality of cutouts 411 .

The roller 440 may include a first roller 441 and a second roller 442 . That is, the plurality of rollers 440 may include one or more first rollers 441 and one or more second rollers 442 .

The first roller 441 is a roller that rotates by the driving force of the motor 460 to be described below. The second roller 442 is a roller that does not rotate by the driving force of the motor 460 and supports the side surface of the accommodated can 500 . That is, the first roller 441 corresponds to the rotation roller, and the second roller 442 corresponds to the support roller.

The roller 440 may be installed on the shaft 450 .

The shaft 450 is positioned outside the bobbin 410 and may be disposed in the longitudinal direction of the bobbin 410 . The shaft 450 may pass through the center of the roller 440 to be installed in the induction heating device 400 .

The shaft 450 may include a first shaft 451 and a second shaft 452 .

The first shaft 451 is a shaft on which one or more first rollers 441 are installed. One or more first rollers 441 may be installed in parallel in the vertical direction on the first shaft 451 . One or more first cutouts 4111 are formed in the first part of the outer surface of the bobbin 410 in the vertical direction, and at least one first roller ( 441 may be installed in the vertical direction of the first shaft 451 .

The second shaft 452 is a shaft on which one or more second rollers 442 are installed. One or more second rollers 442 may be installed in parallel in the vertical direction on the second shaft 452 . One or more second cutouts 4112 are formed in the second portion of the outer surface of the bobbin 410 in the vertical direction, and at least one second roller ( 442 may be installed in the vertical direction of the second shaft 452 .

In FIGS. 5 to 7 , induction heating apparatus in which two first rollers 441 are installed on one first shaft 451 and four second rollers 442 are installed on two second shafts 452 . The shape of (400) is shown. However, the present invention is not limited thereto, and the number of the first shaft 451 and the second shaft 452 may be two or more.

According to an embodiment of the present invention, the position of the shaft 450 may be moved in a radial direction of the bobbin 410 . This is as shown in FIGS. 4, 5 and 8 . As the position of the shaft 450 is movable, the roller 440 is movable in the radial direction of the bobbin 410 .

For example, the shaft 450 may be located at any one of a first position and a second position in a radial direction of the bobbin 410 . The first position is a position of the shaft 450 for all of the outer surface of the roller 440 to be located on the outside of the bobbin 410 , and the second position is that at least a portion of the outer surface of the roller 440 is located on the bobbin 410 . It is the position of the shaft 450 for contacting the side of the can 500 accommodated in the . Accordingly, the distance between the central axis of the bobbin 410 and the first position may be greater than the distance between the central axis of the bobbin 410 and the second position.

On the other hand, the present invention is not limited to the contents described above. That is, any one of the first shaft 451 and the second shaft 452 may be movable in a radial direction of the bobbin 410 . For example, the first shaft 451 may be movable in a radial direction of the bobbin 410 , and the second shaft 452 may not be movable. Hereinafter, for convenience of description, it is assumed that both the first shaft 451 and the second shaft 452 are movable.

The concept of movement of the positions of the first shaft 451 and the second shaft 452 will be described in more detail below.

Motor 460 provides driving force. The motor 460 may be located outside the bobbin 410 , for example, on the side of the bobbin 410 .

The motor 460 may be connected to the first shaft 451 , and thus one or more first rollers 441 may be rotated. In addition, the motor 460 may not be connected to the second shaft 452 , and accordingly, the one or more second rollers 442 may not be rotated by the motor 460 .

In more detail, the drive shaft of the motor 460 is connected to one end of the driving force transmitting device 465 (eg, a pulley), and the other end of the driving force transmitting device 465 is connected to the first shaft 451 . . The first shaft 451 and the driving shaft of the motor 460 may be indirectly connected to each other through the driving force transmitting device 465 . Accordingly, the first shaft 451 may be rotated by the driving force of the motor 460 .

Meanwhile, although not shown in the drawings, according to another embodiment of the present invention, the driving shaft of the motor 460 may be directly connected to the first shaft 451 .

One or more first rollers 441 are fixedly installed on the first shaft 451 . Accordingly, one or more first rollers 441 may rotate based on the rotation of the first shaft 451 , and the can 500 accommodated by the rotating first roller 441 may rotate.

Also, the motor 460 may not be connected to the second shaft 452 . Accordingly, the second shaft 452 may not rotate. In addition, the one or more second rollers 442 may be rotatably installed without being fixedly installed on the second shaft 452 . At this time, as the can 500 accommodated by the one or more first rollers 441 rotates, the one or more second rollers 442 rotate. As one or more second rollers 442 rotate, friction with the rotating can 500 is minimized, and the can 500 is supported.

In other words, the induction heating apparatus 400 according to an embodiment of the present invention rotates the can 500 accommodated in the can accommodation unit based on the rotation of the first roller 441 that is one or more of the plurality of rollers 440 . and the second roller 442 that is the remaining roller rotates according to the rotation of the can 500 . The first roller 441 rotates the can 500 and supports the can 500 , and the second roller 442 serves only to support the can 500 .

The rotation plate 470 is disposed between the bobbin 410 and the lower plate 430 . The lower surface, ie, the bottom surface, of the can 500 accommodated in the upper portion of the rotation plate 470 is seated. The rotation plate 470 rotates based on the rotation of the accommodated can 500 , and simultaneously supports the bottom surface of the accommodated can 500 .

If the rotation plate 470 does not exist, the bottom surface of the can 500 directly contacts the top surface of the lower plate 430 . At this time, when the can 500 is rotated by the first roller 441 , the bottom surface of the can 500 also rotates. Accordingly, there is a problem in that friction occurs between the bottom surface of the can 500 and the top surface of the lower plate 430 . The induction heating device 400 according to the present invention reduces the friction by disposing the rotating plate 470 between the bobbin 410 and the lower plate 430 and makes the can 500 rotate more smoothly. can

5 to 7 , the rotation plate 470 may have a ring shape. Accordingly, the central portion of the rotation plate 470 is penetrated. In addition, in order to more stably support the bottom surface of the can 500 , the upper surface of the rotation plate 470 may have an appropriate width.

Meanwhile, when the lower end of the bobbin 410 and the upper surface of the rotating plate 470 are in contact with each other, friction between the lower end of the bobbin 410 and the upper surface of the rotating plate 470 is caused by the rotation of the rotating plate 470 . This can happen. Accordingly, the lower end of the bobbin 410 may be disposed to be spaced apart from the upper surface of the rotating plate 470 by a predetermined interval.

The bearing 480 is installed between the rotation plate 470 and the lower plate 430 . The bearing 480 may be fixedly installed on the upper surface of the lower plate 430 . Accordingly, the bearing 480 may not rotate.

The bearing 480 supports rotation of the rotating plate 470 and further reduces friction. 5 to 7 , the bearing 480 may have a ring shape. Accordingly, the central portion of the bearing 480 is penetrated.

Hereinafter, a concept in which the can 500 is drawn into the induction heating device 400 and rotates will be described in more detail with reference to FIG. 8 .

8A is a plan view illustrating a shape before the can 500 is introduced into the bobbin 410 . And, (b) of FIG. 8 is a plan view illustrating a shape when the can 500 is drawn into the inside of the bobbin 410 .

Referring to FIG. 8B , the inner diameter (a) of the bobbin 410 is larger than the outer diameter (b) of the can 500 . And, referring to FIG. 8A , when the can 500 is not inserted into the bobbin 410 , the shaft 450 is disposed at a first position in the radial direction of the bobbin 410 , and a roller All of the outer surface of 440 is disposed outside of bobbin 410 . Accordingly, the can 500 can be easily drawn into the bobbin 410 .

Also, when the can 500 is drawn into the bobbin 410 , the shaft 450 moves from the first position in the radial direction of the bobbin 410 to the second position, and the roller 440 at the second position. At least a portion of the outer surface of the can be in contact with the side of the received can (500). Accordingly, the can 500 accommodated by the rotation of the first roller 441 rotates, and accordingly, the second roller 442 rotates. In addition, the can 500 accommodated by the first roller 441 and the second roller 442 disposed at the second position is fixed and does not come into contact with the inner surface of the bobbin 410, and the accommodated can 500 and the bobbin There is no friction between the 410 .

In summary, in the can heating apparatus 100 according to an embodiment of the present invention, the roller 440 can be inserted while winding the working coil 420 on the outer surface of the bobbin 410 in which the can 500 is accommodated. A cutout 411 is formed. Accordingly, the structure of the can heating apparatus 100 for simultaneously heating and rotating the can 500 can be manufactured to be simple and slim.

In addition, the can heating apparatus 100 according to an embodiment of the present invention generates an internal flow of the contents of the can 500 by rotating the can 500 accommodated in the can accommodating part through the roller 440 . Accordingly, heat transfer of the contents of the can 500 may be increased, and thus the temperature of the contents of the can 500 may be rapidly increased.

In addition, the can heating apparatus 100 according to an embodiment of the present invention can more rapidly increase the temperature of the can 500 by winding the working coil 420 on the outer surface of the bobbin 410 . That is, in the prior art, there is a predetermined gap between the heating coil and the can, but in the can heating apparatus 100 according to the present invention, the working coil 420 is attached to the bobbin 410 in which the can 500 is accommodated. Accordingly, the gap between the can 500 and the working coil 420 can be reduced, power wasted, and the temperature of the can 500 can be increased more rapidly.

In addition, in the can heating apparatus 100 according to an embodiment of the present invention, by bringing a roller 440 disposed outside the bobbin 410 into contact with the can 500 accommodated in the bobbin 410 , the can 500 . ) while stably fixing the can 500 can be rotated. At this time, since the position of the roller 440 can be changed, the can 500 can be easily drawn in and out of the bobbin 410 .

Again, referring to FIGS. 5 to 7 , the temperature sensor 490 is disposed under the lower plate 430 and radiates a temperature sensing signal to the lower surface of the accommodated can 500 . Here, the temperature sensor 490 may be a non-contact infrared temperature sensor.

In particular, the temperature sensor 490 may be disposed under the hole 431 formed in the central portion of the lower plate 430 . The temperature sensor 490 may radiate a temperature sensing signal to the upper portion of the lower plate 430 through the hole 431 . The radiated temperature sensing signal is received through the pierced central portion of the rotating plate 470 and the bottom surface of the can 500 received through the pierced central portion of the bearing 480 . Accordingly, the temperature of the bottom surface of the can 500 may be sensed. The sensed temperature may be used to control the output of the working coil 420 and control the rotation of the first roller 441 .

In the induction heating apparatus 400 according to an embodiment of the present invention, accurate temperature measurement is possible by measuring the temperature of the bottom surface of the can 500 .

More specifically, for identification with other cans, the side surface of the container of the can 500 is coated with a specific material and color. However, the material of the container of the can 500 is different from the material of the painting material. Therefore, when measuring the temperature from the side of the can 500 , the temperature of the container of the can 500 and the temperature of the contents inside the can 500 cannot be accurately measured. In particular, when the color of the coating material has a large reflectance, the temperature of the container and contents of the can 500 cannot be measured more accurately.

However, the bottom surface of the can 500 is generally not painted, and has the same material and color as the container. Accordingly, the induction heating apparatus 400 according to an embodiment of the present invention can accurately measure the temperature of the bottom surface of the can 500 by disposing the temperature sensor 490 under the lower plate 430 .

Hereinafter, the flow of the heating operation of the can 500 will be described in more detail with reference to FIG. 10 .

10 is a flowchart of a control method of the can heating apparatus 100 according to an embodiment of the present invention.

Each step of FIG. 10 may be performed centering on the control unit. Hereinafter, the process performed for each step will be described in detail.

In step S1005 , the control unit determines whether the can 500 is accommodated in the bobbin 410 .

According to an embodiment of the present invention, the control unit determines whether the can 500 is accepted by using at least one of the cover open signal transmitted from the cover 300 and the degree of attenuation of the resonance current flowing through the working coil 420 . can

When the can 500 is not accepted, in step S1010 , the control unit may output a message indicating that the can 500 is not present through the output unit.

When the can 500 is accommodated, in step S1015 , the control unit moves the shaft 450 from the second position to the first position.

In step S1020 , the controller turns on the working coil 420 , rotates the first roller 441 , and turns on the temperature sensor 490 . Accordingly, the can 500 rotates while being heated, and the temperature of the can 500 is sensed.

In step S1025, the controller determines whether the sensed temperature has reached a target temperature.

Meanwhile, the target temperature may be set differently for each user. For example, the can heating apparatus 100 may further include an input unit, and may receive a target temperature from a user through the input unit.

When the sensed temperature reaches the target temperature, step S1045 is performed.

If the sensed temperature does not reach the target temperature, the controller measures the heating time in step S1030, and determines whether the heating time measured in step S1035 has reached the maximum heating time.

If the measured heating time does not reach the maximum heating time, in step S1040, the control unit maintains heating and rotation. That is, the control unit maintains the turning on of the working coil 420 and the rotation of the first roller 441 . After this, step S1025 is performed again.

When the measured heating time reaches the maximum heating time, the controller stops heating in step S1045 and moves the shaft 450 from the first position to the second position in step S1050. Accordingly, heating and rotation of the can 500 may be stopped, and the can 500 may be withdrawn.

As described above, the present invention has been described with specific matters such as specific components and limited embodiments and drawings, but these are provided to help the overall understanding of the present invention, and the present invention is not limited to the above embodiments, Various modifications and variations are possible from these descriptions by those of ordinary skill in the art to which the present invention pertains. Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims to be described later, but also all those with equivalent or equivalent modifications to the claims will be said to belong to the scope of the spirit of the present invention. .

Claims

The can is accommodated therein, the bobbin is formed with a plurality of cutouts on the outer surface;

one or more working coils wound on the outer surface of the bobbin and heating the accommodated can;

a plurality of rollers contactable with the side of the accommodated can through the plurality of cutouts; and

Including; a temperature sensor for sensing the temperature of the bottom surface of the accommodated can;

wherein the received can rotates based on rotation of at least one of the plurality of rollers.
According to claim 1,

A motor disposed outside the bobbin and providing a driving force; further comprising,

The plurality of rollers includes one or more first rollers rotated by the driving force of the motor and one or more second rollers supporting the side of the accommodated can without rotating by the driving force of the motor.
3. The method of claim 2,

a first shaft passing through each of the one or more first rollers; and

and a second shaft passing through each of the one or more second rollers.
4. The method of claim 3,

The first shaft rotates by the driving force of the motor,

The one or more first rollers are fixedly installed on the first shaft, and the one or more first rollers rotate based on the rotation of the first shaft.
5. The method of claim 4,

wherein the first shaft is directly connected to a drive shaft of the motor or indirectly connected through a driving force transmitting device.
4. The method of claim 3,

The second shaft does not rotate, and the one or more second rollers are installed on the second shaft to be rotatable.
3. The method of claim 2,

The plurality of cutouts includes one or more first cutouts and one or more second cutouts,

The one or more first cutouts are vertically disposed on a first portion of the outer surface of the bobbin, and the one or more first rollers are installed in parallel in the vertical direction on the first shaft,

The one or more second cutouts are vertically disposed in a second portion of the outer surface of the bobbin, and the one or more second rollers are installed in parallel in the vertical direction on the second shaft.
According to claim 1,

A lower plate disposed under the bobbin; further comprising,

The can heating apparatus, wherein the can is drawn in from the upper part of the bobbin, and the lower plate supports the accommodated can at the lower part of the bobbin.
9. The method of claim 8,

A rotating plate disposed between the bobbin and the lower plate; further comprising,

and the rotating plate rotates based on rotation of the accommodated can.
10. The method of claim 9,

The can heating apparatus further comprising a; bearing disposed between the rotating plate and the lower plate.
11. The method of claim 10,

The bobbin has a cylindrical shape with an empty inside,

The rotating plate and the bearing are ring-shaped,

A can heating device in which a lower surface of the accommodated can is seated on an upper portion of the rotating plate.
9. The method of claim 8,

The temperature sensor is disposed under the lower plate, and radiates a temperature sensing signal to the lower surface of the accommodated can.
13. The method of claim 12,

A hole is formed in the central portion of the lower plate, and the temperature sensor is disposed under the hole,

wherein the temperature sensing signal is radiated to the lower surface of the accommodated can through the hole.
4. The method of claim 3,

At least one of the first shaft and the second shaft is movable in a radial direction of the bobbin.
15. The method of claim 14,

When the can is not accommodated in the bobbin, the one or more shafts are disposed at a first radial position of the bobbin, and the one or more rollers installed on the one or more shafts are disposed outside the bobbin. .
15. The method of claim 14,

When the can is accommodated in the bobbin, the one or more shafts are disposed at a second position in the radial direction of the bobbin, and the one or more rollers installed on the one or more shafts are at least partially inserted into the corresponding one or more cutouts. A can heating device in contact with the side of the can contained therein.
According to claim 1,

wherein the accommodated can is not brought into contact with the inner surface of the bobbin by the plurality of rollers.
According to claim 1,

wherein the one or more working coils are wound on an outer surface of the bobbin so as not to overlap the plurality of cutouts.
The can is accommodated therein, the bobbin is formed with a plurality of cutouts on the outer surface;

a lower plate disposed under the bobbin;

a rotating plate disposed between the bobbin and the lower plate;

a bearing disposed between the rotating plate and the lower plate;

one or more working coils wound on the outer surface of the bobbin and heating the accommodated can; and

A plurality of rollers capable of contacting the side of the accommodated can through the plurality of cutouts; including,

wherein the received can rotates based on rotation of at least one of the plurality of rollers.