WO2022225089A1

WO2022225089A1 - Induction heating-type electric pressure rice cooker having power generating module

Info

Publication number: WO2022225089A1
Application number: PCT/KR2021/005526
Authority: WO
Inventors: 김완수; 남현식; 박병규
Original assignee: 엘지전자 주식회사
Priority date: 2021-04-20
Filing date: 2021-04-30
Publication date: 2022-10-27
Also published as: KR20220144621A

Abstract

Presented is an induction heating-type electric pressure rice cooker having a power generating module. An induction heating-type electric pressure cooker having a power generating module according to an embodiment of the present invention is configured such that a rice cooker body having a built-in power application plate, an inner pot that is seated in or detached from the inside of the rice cooker body, and a lid of the rice cooker for opening and closing an upper opening part of the inner pot and the rice cooker body are attached to and detached from each other. The lid of the rice cooker has a power generating module formed thereinside which generates electric power by using a difference in temperature between the surface of the inner pot and the outside of the lid of the rice cooker. The power generating module supplies electric power generated by the difference in temperature between the surface of the lid of the inner pot and the outside to one of an electric device and a battery, such that cooking operations, such as cooking and keeping warm, can be performed for a predetermined period of time even when external power is cut off.

Description

Induction heating electric pressure cooker with power generating module

The present invention relates to an induction heating type electric pressure cooker having a power generating module.

An electric pressure cooker is a home appliance that uses electricity as a heating source to perform a cooking function. The electric pressure cooker maintains the inside of the oven at high pressure to keep the heating temperature higher than normal atmospheric pressure, so that it can cook quickly. have.

1 is a cross-sectional configuration diagram showing an induction heating type electric cooker according to the prior art. Specifically, FIG. 1 shows a cooking appliance for heating an inner pot using induction heating as shown in Japanese Patent Application Laid-Open No. 1993-84126.

Referring to FIG. 1 , a cooking appliance 1 according to the related art includes a body 2 and a lid 10 .

Inside the main body 2, an induction coil 6 for heating the lower surface and an induction coil 7 for heating the side surface for heating the inner pot 8 are respectively disposed. In addition, a temperature sensor 9 for measuring the temperature of the inner pot 8 is disposed on the lower surface of the main body 2 .

A handle 11 for lifting the lid 10 is disposed on the upper surface of the lid 10 coupled to the upper surface of the body 2 . The inner space of the lid 10 is filled with an insulating material 13 for reducing heat loss.

Meanwhile, a heater 18 and a heating plate 17 for heating the lid are disposed inside the lid 10 . In order to supply current to the heater 18 for heating the lid, internal induction coils 6 and 7 are disposed inside the lid 10 and inside the body 2, respectively. That is, the main body side upper induction coil 15 connected to the power supply unit (not shown) is disposed inside the main body 2 , and the lid side induction coil 15 is positioned opposite the main body side upper induction coil 15 inside the lid 10 . A coil 16 is disposed.

According to this structure, when a current is supplied to the upper induction coil 15 on the main body side through a power supply unit (not shown), a magnetic field is formed by the upper induction coil 15 on the main body side, and the lid-side induction coil 16 by this magnetic field ) is induced in the current. The current induced in the lid side induction coil 16 is supplied to the lid heating heater 18 electrically connected to the lid side induction coil 16 . Accordingly, the heater 18 for heating the lid and the heating plate 17 are heated.

According to the prior art, an upper induction coil 15 on the body side is disposed inside the body 2 to supply current to the heater 18 for heating the lid. As shown in FIG. 1 , the upper body-side induction coil 15 should be disposed at a position opposite to the lid-side induction coil 16 . Accordingly, the main body-side upper induction coil 15 is disposed at the upper end inside the main body 2 .

However, a space H1 for arranging the main body-side upper induction coil 15 must be secured at the upper end of the body 2 . However, as shown in FIG. 1 , since the size (H1+H2+H1) inside the main body 2 is limited, the larger the size (H1) of the space occupied by the upper induction coil 15 on the main body side, the larger the inner pot (8). There is a problem in that the size H2 of the accommodating space becomes small.

On the other hand, Figure 2 is a cross-sectional configuration diagram showing another form of the electric pressure cooker according to the prior art. Specifically, FIG. 2 shows an electric pressure cooker shown in Korean Patent Application Laid-Open No. 10-2005-0024156 (March 10, 2005).

2, in the case of an electric pressure cooker, an oven 20, a body case 22 in which the oven 20 is seated, a lid 24 for opening and closing the oven 20 and the body case 22, It is configured including an electric device and a steam exhaust device for regulating the pressure in the oven 20 .

The electric device of the electric pressure cooker includes a working coil 26 that is mounted on the main body case 22 to generate an induced current during cooking, and a heater 28 that generates heat.

The steam discharge device is automatically opened during cooking to lower the pressure in the oven 10, a solenoid valve 23, and a poise valve that is opened and closed by the pressure in the oven 20 to keep the pressure in the oven 20 constant (poise valve, 30).

During cooking of the electric pressure cooker configured as described above, an eddy current is induced in the oven 20 by the working coil 26, and the oven 20 is gradually heated due to the eddy current, so that the rice grains are soaked and cooked. At this time, since the solenoid valve 23 and the poise valve 30 constituting the vapor discharge device are not maintained in a closed state, the pressure inside the oven 20 becomes higher than atmospheric pressure.

As the pressure inside the oven increases, the temperature of the rice also rises to a temperature higher than the boiling point (about 100℃) at normal atmospheric pressure, so quick cooking is achieved.

After that, when the boiling and cooking process is finished, the steaming process proceeds for a certain time while the heating by the working coil 26 is stopped, and the water vapor inside the oven 20 is discharged to the outside by the solenoid valve 23 The warming process proceeds in a state where the pressure is lowered.

In the conventional electric pressure cooker configured and operated as described above, after the cooking and steaming process is performed in a state where the pressure inside the oven is increased, the water vapor inside the lid 24 through the steam discharge device such as the solenoid valve 23 is discharged from the upper end of the lid 24 . is emitted as

As shown in Figure 2, in the conventional electric pressure cooker, the lid 24 for opening and closing the main body case 22 is bound by a folding means such as a hinge. Accordingly, a power conversion circuit for supplying power to the working coil 26 of the main body case 22, a display panel for displaying a cooking state, an interface panel provided with a cooking setting button, etc., and operation control of the power conversion circuit and the display panel, etc. The circuits may be configured in the body case 22 or the lid 24 .

However, since the electric devices such as the power conversion circuit, the operation control circuit, the display panel, and the interface panel in the body case 22 or the lid 24 all operate by receiving external power, all operations are stopped when the external power is cut off. there was a problem with Accordingly, a method of embedding a battery in the main body case 22 or the lid 24 has been proposed, but it was difficult to apply due to uncertainties such as battery replacement and battery life.

On the other hand, the lid detachable pressure cooker presented in Japanese Patent Application Laid-Open No. 1993-84126 and Korean Patent Application Laid-Open No. 10-2015-0100324 (2015.09.02), etc. discharges internal water vapor after cooking operations such as cooking, The lid 22 could be removed by releasing the lid lock. In this way, when the main body case 22 and the lid 24 have a separable structure, and there is no electrical connection between the main body case 12 and the lid 14, electrical devices such as the operation control circuit are connected to the main body case 22 There was a constraint that could only be formed.

In addition, since the main body case 22 and the lid 24 of the electric pressure cooker are both maintained at a high temperature for a long period, in order to form various electric devices in the main body case 22 or the lid 24, various electric devices are required. There was a problem in that the heat preservation and cooling structure had to be provided in a complicated manner.

An object of the present invention is to provide an induction heating type electric pressure cooker having a power generating module capable of generating and using electric power by itself by using the internal heating temperature and external temperature difference according to cooking operations such as cooking and keeping warm.

In addition, by generating its own power using the temperature difference between the internal heating temperature and the external temperature of the lid of the rice cooker, induction heating type electric pressure cooker that can easily form various electric devices on the lid of the rice cooker even in a structure in which the rice cooker body and the lid are separated. aim to do

In addition, by applying a simple temperature diffusion structure to increase the internal heat temperature diffusion power of the lid of the rice cooker, the purpose of providing an induction heating type electric pressure cooker that can increase the thermal insulation and cooling efficiency of various electric devices built into the lid of the rice cooker do.

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. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the appended claims.

An induction heating type electric pressure cooker having a power generating module according to an embodiment of the present invention is a rice cooker body with a built-in power application plate, an inner pot that is seated or detached into the inside of the rice cooker body, and an upper open portion of the inner pot and the rice cooker body to open and close The lid of the rice cooker is configured to be separated and detached separately from each other.

A power generating module that generates electric power using the temperature difference between the surface temperature of the inner pot cover and the outside of the rice cooker lid is formed inside the lid of the rice cooker. to be supplied, etc.

The power generating module is configured to be connected to the upper surface of the inner pot cover located at the lowest end of the rice cooker lid and the inner side of the rice cooker cover and the inner cover of the upper end. Accordingly, the power generation module may be configured to surround a portion of the bottom surface, a portion of the side portion, and a portion of the upper portion of the rice cooker lid of the first waterproof partition wall member forming the waterproof space.

In addition, the induction heating type electric pressure cooker according to an embodiment of the present invention may further include a power transmission coil disposed inside the main body and transmitting power transmitted from the outside to the power transmission coil. Accordingly, the inner pot may be heated by the power transmission coil.

The inside of the rice cooker body to which the inner pot is coupled includes a power transmitting coil for receiving power transmitted from the outside and a power receiving coil disposed on one side of the inner pot lid and receiving power transmitted by the power transmitting coil.

The rice cooker lid may be rotationally coupled to the rice cooker body. In addition, when the lid of the rice cooker is combined with one surface of the rice cooker body to seal the inner pot receiving space, the power transmitting coil and the power receiving coil may completely overlap each other.

In an embodiment of the present invention, the inner pot may be heated by the power received by the power transmission coil. Also, one or more electronic devices may be driven by power received by the power receiving coil.

The power transmission coil may be disposed inside the handle of the rice cooker body protruding in a radial direction from one side of the rice cooker body. In addition, the power receiving coil may be disposed on the inside of the lid handle protruding in a radial direction from one side of the rice cooker lid.

In an embodiment of the present invention, the body handle and the lid handle may be made of a non-metallic material. The amount of power delivered to one or more electronic devices provided in the induction heating type electric pressure cooker of the present invention may be proportional to an area where the power transmitting coil and the power receiving coil overlap.

In an embodiment of the present invention, a power conversion device for converting AC power supplied by the power receiving coil into DC power may be disposed in the inner space of the rice cooker body or the waterproof space of the rice cooker lid. Accordingly, in the waterproof space of the lid of the rice cooker, a controller for determining the fastening state of the lid of the rice cooker and the main body may be disposed. Accordingly, the controller may determine the fastening state of the rice cooker lid and the rice cooker body by comparing the magnitude of current, voltage, or power supplied to one or more electronic devices by the power receiving coil with a predetermined reference value.

In an embodiment of the present invention, if the magnitude of the current, the magnitude of the voltage, or the magnitude of the power is greater than the reference value, the controller determines that the fastening state of the rice cooker lid and the rice cooker body is normal, and the magnitude of the current, the magnitude of the voltage, or the magnitude of the power If it is less than the reference value, it may be determined that the fastening state of the rice cooker lid and the rice cooker body is abnormal.

In an embodiment of the present invention, the induction heating type electric pressure cooker may further include a heating coil disposed inside the rice cooker body. Also, the inner pot may be heated by a heating coil. In addition, the induction heating type electric pressure cooker may further include a power transmission coil disposed inside the rice cooker body and transmitting power transmitted from the outside to the power transmission coil. Accordingly, the inner pot may be heated by the power transmission coil. Here, the cross-section of the rice cooker body and the cross-section of the lid may be circular.

The induction heating electric pressure cooker having a power generating module according to an embodiment of the present invention can generate and use electric power by itself by using the internal heating temperature and the external temperature difference according to cooking operations such as cooking and keeping warm. Accordingly, it is possible to improve user satisfaction and reliability by allowing cooking operations such as cooking and keeping warm for a predetermined period even when external power is cut off.

In addition, according to the present invention, even in a structure in which the rice cooker body and the lid are separated, various electric devices such as a user interface device and a display panel can be formed on the rice cooker lid, thereby satisfying the user's convenience and requirements.

In addition, according to the present invention, it is possible to further increase the durability and stability of the electric pressure cooker by increasing the heat preservation and cooling efficiency of the operation control circuit such as a display panel built in the lid of the rice cooker.

In addition, power may be wirelessly supplied to the electronic device disposed in the storage space inside the lid of the cooking appliance by using the power receiving coil disposed on the lid handle and the power transmission coil disposed on the handle of the rice cooker body.

In addition, by using the power receiving coil disposed on the lid handle and the power transmission coil disposed on the body handle, power is wirelessly transmitted to the electronic device disposed in the storage space inside the rice cooker lid, and at the same time, the connection state of the rice cooker lid and the rice cooker body is determined. It is quickly checked, and the confirmed connection status of the lid and main body is immediately displayed on the electric pressure cooker or induction heating device. Accordingly, a situation in which the user attempts to cook in a state in which the inner pot receiving space of the main body is not completely sealed by the lid can be prevented. In addition, the user can easily and intuitively check the fastening state of the lid and the main body of the electric pressure cooker.

In addition, according to an embodiment of the present invention, the fastening state of the lid of the rice cooker and the main body of the rice cooker based only on the power transmitted to the inside of the lid through the power transmitting coil and the power receiving coil without a separate component for detecting the coupling state between the rice cooker lid and the rice cooker body. is confirmed Therefore, it is possible to reduce the manufacturing cost and size of the electric pressure cooker.

In addition, in an embodiment of the present invention, the lid of the electric pressure cooker is completely separated from the rice cooker body. Accordingly, it is more convenient to wash the lid of the rice cooker, and the lid can be cleaned and managed more clearly. In addition, since the lid is completely separated from the main body of the rice cooker, it is also convenient to clean the main body. As such, since the main body and the lid of the rice cooker can be conveniently washed, the electric pressure cooker can be used more hygienically.

In addition, when the electric pressure cooker according to an embodiment of the present invention receives power from the induction heating device, power is supplied into the cooking appliance through the lower surface of the main body in contact with the induction heating device. Therefore, it is advantageous that the shape of the lower surface of the main body is circular in order to evenly transmit electric power to the inside of the cooking appliance. In addition, since the lower surface of the main body is formed in a circular shape, when the electric pressure cooker is placed on the top of the induction heating device, power can be evenly transmitted into the electric pressure cooker regardless of the direction the electric pressure cooker faces. According to an embodiment of the present invention, since the lower surface of the electric pressure cooker is formed in a circular shape, the cooking appliance may be used in a non-directional manner on the induction heating apparatus.

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 is a cross-sectional view showing the internal structure of an electric pressure cooker according to the prior art.

Figure 2 is another cross-sectional view showing the internal structure of the electric pressure cooker according to the prior art.

3 is an exploded perspective view showing an induction heating type electric pressure cooker according to an embodiment of the present invention.

FIG. 4 is a perspective view illustrating a coupling structure of the rice cooker body and the rice cooker lid shown in FIG. 3 .

5 is a cross-sectional view showing a state in which the lid, the inner pot, and the main body of the induction heating type electric pressure cooker are coupled to the embodiment of the present invention.

FIG. 6 shows an embodiment in which the radio transmission/reception coils disposed inside the lid handle shown in FIGS. 3 to 5 are arranged in multiple layers, respectively.

7 is a cross-sectional view showing a state in which the lid, the inner pot, and the main body of the induction heating type electric pressure cooker are combined according to another embodiment of the present invention.

8 is a cross-sectional view showing a state in which the lid, the inner pot, and the main body of the induction heating type electric pressure cooker are combined according to another embodiment of the present invention.

9 is a cross-sectional view showing a state in which the lid, the inner pot, and the main body of the induction heating type electric pressure cooker are combined according to another embodiment of the present invention.

10 is a cross-sectional view showing a state in which the lid, the inner pot, and the main body of the induction heating type electric pressure cooker are combined according to another embodiment of the present invention.

11 is a cross-sectional view showing the coupling structure of the rice cooker body and the rice cooker lid shown in FIG.

12 is a cross-sectional view illustrating an arrangement structure of a power generation module in a state in which the inner cover and the first waterproof partition wall member of FIG. 10 are removed.

13 is a perspective view and a cross-sectional view specifically illustrating a power generating module according to an embodiment of the present invention.

14 is a graph showing temperature changes inside and outside the inner pot lid and inner pot for each cooking period of the electric pressure cooker.

15 is a diagram illustrating an arrangement relationship between an electric circuit board and a generating module disposed in the waterproof space of FIGS. 11 and 12 .

16 is a cross-sectional view specifically illustrating a power generation module according to another embodiment of the present invention.

17 is a cross-sectional view specifically illustrating a power generation module according to another embodiment of the present invention.

18 is a perspective view and a cross-sectional view specifically illustrating a power generating module according to another 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 skilled 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 present specification, the first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are only used to distinguish one component from other components, and unless otherwise stated, the first component may be the second component, of course.

In addition, in the present specification, 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 may be formed between each component. It is to be understood that elements may be “interposed,” or each element may be “connected,” “coupled,” or “connected to,” through another element.

Also, as used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "consisting of" or "comprising" should not be construed as necessarily including all of the various components or various steps described in the specification, some of which components or some steps are It should be construed that it may not include, or may further include additional components or steps.

The present invention is an induction heating type electric pressure cooker that inductively heats the inner pot using the working transmitting coil of the power applying plate and the working receiving coil surrounding the inner pot by making a power applying plate including an inverter and a working transmitting coil, etc., built into the rice cooker body. present about

In the present invention, the rice cooker body having a built-in power application plate, the inner pot that is seated or detached from the inside of the rice cooker body, and the rice cooker lid that opens and closes the inner pot and the upper open portion of the rice cooker body are configured to be separated from each other.

A lid locking device is configured on the inside of the rice cooker lid, and the lid locking device enables the rice cooker lid to remain locked while covering the inner pot and the upper open portion of the rice cooker body. Conversely, when unlocking the lid lock, the lid of the rice cooker may be separated from and opened from the rice cooker body.

Hereinafter, an induction heating type electric pressure cooker having an improved lid locking device according to an embodiment of the present invention will be described in detail with reference to the drawings.

3 is an exploded perspective view showing an induction heating type electric pressure cooker according to an embodiment of the present invention. And, FIG. 4 is a front view showing the lid of the rice cooker shown in FIG. 3 in more detail.

3 and 4, the electric pressure cooker of the present invention is a rice cooker body 200 with a built-in power application plate, an inner pot 201 that is seated or detached inside the rice cooker body 200, and a rice cooker including an inner pot It includes a rice cooker lid 100 that covers the main body 200 .

The power application plate may be configured separately from the rice cooker body 200 , or may be integrally configured with the rice cooker body 200 on the inner or lower surface of the rice cooker body 200 . The power application plate may be formed in a circular, rectangular or polygonal plate type so that the rice cooker body 200 can be easily seated or unloaded on the upper surface. Such a power application plate is configured to include an inverter for induction heating, a working transmitting coil, and a power supply receiving external power. Hereinafter, an example in which the power application plate is built in the rice cooker body 200 will be described.

The rice cooker body 200 is configured such that the inner pot 201 to be cooked and kept warm is detachable therein. A power application plate may be disposed on the lower surface of the rice cooker body 200 , and the inner pot 201 is inductively heated using a working receiving coil installed to surround the inner pot 201 inside the rice cooker body 200 .

The inside of the rice cooker body 200 further includes a PET (Polyethylene Terephthalate)-based coil base having good heat resistance in order to prevent the heat of the inductively heated inner pot from being emitted to the outside.

The working receiving coil fixedly arranged to surround the outer surface of the inner pot 201 seated inside the rice cooker body 200 reacts electrostatically by the induced current applied through the working transmitting coil of the power application plate to the inner pot 201. induction heating. Accordingly, cooking and keeping warm such as soaking, heating, boiling (or cooking), steaming, etc. for the materials inside the inner pot 201 are performed.

The inner pot 201 is configured to form a cylindrical storage space in which cooking materials such as grains and water are contained, and a plurality of protruding fastening portions 201a are formed along the outer periphery of the upper open portion of the storage space. The working receiving coil is fixed by the coil base so that when the inner pot 201 is seated inside the rice cooker body 200, it is arranged and maintained in a form surrounding the outer surface of the inner pot 201 seated therein.

The rice cooker lid 100 is configured to open and close the upper open portion of the inner pot 201 by being separated from the upper open portion of the rice cooker body 200 and the inner pot 201 or fastened to the upper open portion of the rice cooker body 200 .

A power receiving coil 122d is disposed inside the lid handle 122 . The power receiving coil 122d is disposed inside the power receiving coil receiving space formed inside the lid handle 122 . Since the lid handle 122 protrudes in a radial direction from one side of the rice cooker lid 100 , the power receiving coil 122d is also disposed where it projects radially from one side of the rice cooker lid 100 . According to this arrangement, the distance between the center of the lower surface (or inner pot 201 ) of the rice cooker body 200 and the center of the power receiving coil 122d is greater than the radius of the lower surface of the rice cooker body 200 .

The power receiving coil 122d generates a current using a magnetic field generated by the power transmitting coil 122c, as will be described later.

The power transmission coil 122c performs wireless power transmission to the power reception coil 122d by generating a magnetic field based on the current supplied by the power transmission coil.

The power receiving coil 122d is electrically connected to an electronic device disposed inside the rice cooker lid 100 , for example, a controller, a communication module, a display module, and the like. Accordingly, the current generated by the power receiving coil 122d may be supplied to the electronic device disposed inside the rice cooker lid 100 .

In an embodiment of the present invention, a power conversion device (not shown) for converting AC power supplied by the power receiving coil 122d into DC power may be disposed inside the rice cooker lid 100 . An electronic device driven by DC power instead of AC power supplied by the power receiving coil 122d may be disposed inside the rice cooker lid 100 . In order to drive the electronic device, a power converter (not shown) that converts AC power into DC power may be disposed.

In one embodiment of the present specification, the electronic device disposed inside the rice cooker lid 100, which will be described later, sets the magnitude of the current supplied to the power supply unit through the power receiving coil 122d, the magnitude of the voltage, or the magnitude of the power with a predetermined reference value. By comparison, it is possible to determine the fastening state of the rice cooker lid 100 and the rice cooker body 200 .

For example, when the current of the power receiving coil 122d is measured by a current sensor (not shown), an electronic device including a control circuit such as a microprocessor may preset the magnitude of the current measured by the current sensor (not shown). Compare with the set reference current value. If the magnitude of the current measured by the current sensor (not shown) is equal to or greater than the reference current value, the electronic device may determine the fastening state of the rice cooker lid 100 and the rice hand body 200 as 'normal'. Conversely, the current sensor (not shown) When the magnitude of the current measured by ) is less than the reference current value, the controller 200 may determine the fastening state of the rice cooker lid 100 and the rice cooker body 200 as 'abnormal'.

As another example, when the magnitude of the voltage supplied from the power receiving coil 122d is measured by a voltage sensor (not shown), the electronic device compares the magnitude of the voltage measured by the voltage sensor (not shown) with a predetermined reference voltage value. Compare. When the magnitude of the voltage measured by the voltage sensor (not shown) is equal to or greater than the reference voltage value, the electronic device may determine the connection state between the rice cooker lid 100 and the rice cooker body 200 as 'normal'. Conversely, when the magnitude of the voltage measured by the voltage sensor (not shown) is less than the reference voltage value, the electronic device may determine the fastening state of the rice cooker lid 100 and the rice cooker body 200 as 'abnormal'.

As another example, the electronic device calculates the amount of power supplied from the power receiving coil 122d based on the magnitude of the current and the voltage supplied from the power receiving coil 122d, and determines the amount of the calculated power in advance. Compare with the reference power value. If the calculated power level is equal to or greater than the reference power value, the electronic device may determine the fastening state of the rice cooker lid 100 and the rice cooker body 200 as 'normal'. Conversely, if the calculated power is less than the reference power value, the electronic device may determine the fastening state of the rice cooker lid 100 and the rice cooker body 200 as 'abnormal'.

Referring to FIG. 4 , the inside of the rice cooker lid 100 is divided into a non-waterproof space 100A in which a side portion and a lower surface are partially opened, and first and second

waterproof spaces

100B and 100C sealed from the outside. do.

A first waterproof partition wall member 129 for forming a storage space in the space between the inner pot cover disposed on the bottommost part of the rice cooker lid 100 and the transparent housing 133 disposed on the topmost part, and a first waterproof covering the storage space The partition wall cover 131 is provided to form the first waterproof space 100B.

The first waterproof partition wall member 129 has a semicircular, circular or polygonal bottom portion, and a semi-cylindrical, cylindrical or polygonal column-shaped side partition wall so that the first waterproof space 100B can be formed inside the rice cooker lid 100 . By being made of, it is configured to form a storage space such as a cylindrical, semi-cylindrical shape inside. The first waterproof partition wall cover 131 is configured to cover all of the storage space of the first waterproof partition wall member 129 . Accordingly, a first waterproof space 100B having a semi-cylindrical, cylindrical, or polygonal pole shape may be formed inside the first waterproof partition wall cover 131 including the first waterproof partition wall member 129 .

Electrical devices such as a power conversion circuit, an operation control circuit, a display panel, and an interface panel that are waterproofed with silicon or the like may be disposed in the first waterproof space 100B of the rice cooker lid 100 .

The second waterproof partition member 140 extends from the opening of the transparent inner cover (not shown) in the lower direction of the outer peripheral surface of the opening, so that the lower surface of the extended opening is seated and supported on a partial area of the upper surface of the insulating material cover or the inner pot cover. formed to be Here, the second waterproof partition wall member 140 is a side partition wall of a cylindrical or polygonal column shape extending from the opening of the inner cover toward the lower inner pot cover while contacting one side of the first waterproof partition member 129 and the side thereof. include Another second waterproof space 100C in contact with the first waterproof space 100B is formed inside the rice cooker lid 100 by the cylindrical or polygonal pole-shaped side partition walls of the second waterproof partition wall member 140 . do. In the second waterproof space 100C, sensors such as a temperature sensor 150, a solenoid valve 152, a non-return device 153, and the like may be configured.

A hole or an opening is formed in a part of the side of the remaining peripheral area except for the first waterproof space 100B made of the first waterproof partition wall member 129 and the second waterproof space 100C made of the second waterproof partition wall member 140 . It becomes the non-waterproof space 100A in a state of being completed.

The inner non-waterproof space 100A of the rice cooker lid 100 is configured and arranged with a lid fastening device 128 and a steam outlet including a poise valve 111 or a pressure release button, and the like.

The poise valve 111 or the pressure release button is disposed on a valve pipe having a water vapor discharge hole penetrating through the inner pot cover at the lower end, and is configured to pass through the uppermost transparent housing 133 . Accordingly, the poise valve 111 or the pressure release button rises according to the internal pressure of the inner pot 201 , thereby opening the water vapor discharge hole of the valve pipe so that water vapor is discharged.

In an embodiment of the present invention, the rice cooker lid 100 is completely separated from the rice cooker body 200 . Therefore, when the rice cooker lid 100 is fastened with the rice cooker body 200 or the rice cooker lid 100 placed on the rice cooker body 200 is separated from the rice cooker body 200, the user uses the lid handle 122 to The rice cooker lid 100 can be easily lifted. Therefore, the movement and storage of the rice cooker lid 100 is simplified. In particular, since the temperature of the rice cooker lid 100 increases during the cooking process, the user does not get burned by lifting the rice cooker lid 100 using the lid handle 122 .

The lid fastening device 128 is configured to be coupled or separated from the handle 122 of the rice cooker lid 100 for each locking operation or unlocking operation of the rice cooker lid 100 inside the rice cooker lid 100 .

As shown in FIG. 5 , a power supply circuit 181 , a heating coil 202 , a power transmission coil 300 , and a temperature sensor are disposed in the body storage space 200a formed inside the Babson body 200 . do.

The electric pressure cooker according to an embodiment of the present invention may be driven by power supplied from an external power source.

The power supply circuit 181 converts power supplied from an external power source to supply a high-frequency current to the heating coil 202 . That is, in the embodiment shown in FIG. 5 , the electric pressure cooker is connected to an external power source by wire and may receive power from an external power source.

When a high-frequency current is supplied to the heating coil 202 , a magnetic field is generated in the heating coil 202 . When an eddy current is induced in the inner pot 201 by the magnetic field generated in the heating coil 202 , Joule heat is generated in the inner pot 201 by the resistance component, eddy current loss and hysteresis loss of the inner pot 201 . Accordingly, the inner pot 201 is heated.

On the other hand, the electric pressure cooker may perform cooking or storage operation by receiving power from a device other than an external power source, for example, the induction heating device 300 . That is, in the embodiment shown in FIG. 5, the electric pressure cooker may receive power by wire or wirelessly.

The power transmission coil 500 receives power from the working coil of the induction heating device 300 . The power transmission coil 500 is electrically connected to the heating coil 202 . When the electric pressure cooker is placed on the induction heating device 300 , when a high-frequency current flows in the working coil, a current is induced in the power transmission coil 500 by the magnetic field generated in the working coil. The current induced in the power transmission coil 500 is supplied to the heating coil 202 electrically connected to the power transmission coil 500 to enable heating of the inner pot 130 by the heating coil 202 .

Also, the power transmission coil 500 is electrically connected to the power transmission coil 122a. Accordingly, the current generated by the power transmission coil 500 may be transmitted to the power transmission coil 122a. When the current generated by the power transmission coil 500 is transferred to the power transmission coil 122a, a magnetic field is generated around the power transmission coil 122a while the current flows in the power transmission coil 122 .

In order for the electric pressure cooker to receive more power through the induction heating device 300 , the overlapping area of the power transmission coil 500 and the working coil should be wider. Most of the working coils disposed inside the induction heating device 300 have a circular, oval or rectangular shape having a center. It is advantageous that the cross section of 200 and the power transmission coil 500 each have a circular shape. In addition, in order to completely seal the inner pot accommodating space 200a inside the rice cooker body 200 having a circular shape, it is advantageous that the cross-sectional shape of the rice cooker lid 100 is also circular.

As such, if the cross-section of the rice cooker body 200 and the cross-section of the rice cooker lid 100 each have a circular shape, when the user puts the electric pressure cooker on the induction heating device 300, the center of the heating area where the working coil is disposed and electricity Aligning the center of the pressure cooker becomes easy.

For reference, in the present specification, the cross-section of the rice cooker body 200 and the cross-section of the rice cooker lid 100 mean a cross-section parallel to the bottom surface of the rice cooker body 200 , respectively.

The inner pot accommodating space 200a for accommodating the inner pot 201 is formed in the rice cooker body 200 . An outer end is formed on the outer peripheral surface constituting the outermost portion of the inner pot receiving space (200a).

At the outer end of the rice cooker body 200, a body handle 122a that allows the user to lift the rice cooker body 200 is disposed. The main body handle 122a protrudes from one side of the rice cooker body 200, for example, in the radial direction from the outer end. The position, number, and shape of the body handle 122a may vary depending on the embodiment.

The electric pressure pot according to an embodiment of the present specification may receive power wirelessly through the induction heating device 300 without receiving power through a wired cable. Therefore, the user should be able to easily lift the rice cooker body 200 and put it on the top of the induction heating device 300 or easily lift the rice cooker body 200 placed on the top of the induction heating device 300 . According to an embodiment of the present specification, the user can easily lift the rice cooker body 200 by using the main body handle 122a, thereby increasing user convenience and mobility of the electric pressure field pot, and storage of the electric pressure field pot. This becomes convenient.

In the embodiment shown in FIG. 6 , the power transmission coil 122c is disposed in a single layer inside the body handle 122a, and the power reception coil 122d) is disposed in a single layer inside the lid handle 122 .

However, in another embodiment of the present specification, the power transmission coil 122c disposed inside the body handle 122a may be disposed in multiple layers, and the power reception coil 122d disposed inside the lid handle 122 is multi-layered. It can be arranged in layers.

For example, as shown in FIG. 6 , inside the body handle 122a, the first power transmission coil 122b and the second power transmission coil 122c disposed on a different layer from the first power transmission coil 122b are double It can be arranged in layers. In addition, inside the lid handle 122 , the first power receiving coil 122e and the second power receiving coil 504d disposed on a different layer from the first power receiving coil 504e may be arranged in a double layer.

6 shows an embodiment in which the power transmitting coil and the power receiving coil are respectively arranged in a double layer. However, in another embodiment of the present specification, the power transmitting coil and the power receiving coil may each be composed of three or more layers. As such, when the power transmitting coil and the power receiving coil are respectively arranged in multi-layers, there is an advantage in that the amount of power transmitted to the power receiving coil by the power transmitting coil is higher.

In addition, according to this arrangement, the distance R2 between the center of the lower surface (or inner pot 201) of the rice cooker body 200 and the center of the power transmission coils 502a, 502b is the lower surface of the main body 170 greater than the radius (R1) of

The power transmitting coils 122c and 122c perform wireless power transmission to the power receiving coils 122e and 122d by generating a magnetic field based on the current supplied by the power transmitting coil 500 .

In one embodiment of the present specification, the body handle 122a may be made of a non-metallic material. For example, the body handle 122a may be made of a plastic material having low electrical and thermal conductivity. When a current flows through the power transmission coils 122c and 122b to generate a magnetic field, thermal energy is generated in the power transmission coils 122c and 122b itself. Therefore, when the body handle 122a is made of a non-metallic material, the user does not feel discomfort when holding the body handle 122a, and the possibility of getting burned when the user holds the body handle 122a is prevented.

In addition, when wireless power transmission is performed by the power transmission coils 122c and 122b, the power loss due to the body handle 122a is minimized because the body handle 122a is made of a non-metallic material. Accordingly, the efficiency of wireless power transmission by the power transmission coils 122c and 122b is increased.

As a means for the rice cooker body 200 to supply power to the rice cooker lid 100 , it may be considered to arrange an electrode for power transmission on one side of the rice cooker body 200 and one side of the rice cooker lid 100 , respectively. However, when electrodes are disposed on one side of the rice cooker body 200 and on one side of the lid 100, respectively, since the electrodes must be exposed to the outside, it becomes difficult to wash the rice cooker body 200 and the lid 100, and the electrode is due to foreign substances attached to the electrode. There is a possibility of poor contact between them.

However, in an embodiment of the present specification, the power transmission coils 122c and 122b and the power reception coils 122c and 122d are disposed inside the body handle 122a and the lid handle 122, respectively, so they are not exposed to the outside. Therefore, it is easy to clean the rice cooker body 200 and the lid 100, the probability of occurrence of a malfunction is lowered, the durability of the electric pressure cooker is improved.

As shown in FIGS. 5 and 6 , power transmission coils 122b and 122c for supplying power to an electronic device disposed inside the lid 120 in the cooking appliance 100 according to an embodiment of the present specification. Silver is disposed on the inside of the main body handle (122a) rather than the inside of the rice cooker body (200). In other words, the power transmission coils 122b and 122c are not disposed inside the main body storage space 200a.

The configuration of the electric pressure cooker shown in FIG. 7 is basically the same as that of the electric pressure cooker shown in FIG. 5 . However, in the embodiment of FIG. 5 , the electric pressure cooker is not connected to an external power source by wire and only receives power wirelessly from the induction heating device 300 . Accordingly, in the embodiment of FIG. 5 , a power supply circuit ( 181 in FIG. 5 ) for converting power supplied from an external power source and supplying a high frequency current to the heating coil 202 is not disposed in the main body storage space 200a . In addition, in the embodiment of Figure 5, the heating coil 202 is not disposed in the body storage space (200a). Instead, only the power transmission coil 500 is disposed on the lower surface of the main body storage space 200a. In the embodiment of Figure 7, the power transmission coil 500 is disposed closer to the center of the inner pot 201 compared to the embodiment of Figure 5.

In the embodiment of FIG. 7 , the power transmission coil 500 is inductively heated by the working coil of the induction heating device 300 , and the inner pot 201 is heated by the power transmission coil 500 . Also, although not shown, the power transmission coil 500 is electrically connected to the power transmission coils 122b and 122c and transmits the current induced by the working coil of the induction heating device 300 to the power transmission coils 122b and 122c. do.

In other words, in the embodiment of FIG. 7 , the power transmission coil 500 transmits power to the power transmission coils 122b and 122c while heating the inner pot 201 . Accordingly, since the heating coil 202 shown in FIG. 5 is omitted, the components constituting the electric pressure cooker are simplified and the manufacturing cost is reduced.

8 shows an embodiment in which a wireless transmitting coil disposed inside the body handle and a wireless receiving coil disposed inside the lid handle are each disposed in multiple layers.

5 and 7, the power transmitting coils 122b and 122c are arranged in a single layer inside the body handle 122a, and the power receiving coils 122d and 122e are arranged in a single layer inside the lid handle 122. is placed as

However, as shown in Figure 6, the power transmission coil (122b, 122c) disposed inside the body handle (122a) may be disposed in multiple layers, the power reception coil (122d, 122e) disposed inside the lid handle (122b) may be arranged in multiple layers.

For example, as shown in FIGS. 6 and 8 , inside the body handle 122a , the first power transmission coil 122b and the first power transmission coil 122b and the second power transmission coil 122c are disposed on a different layer. It can be arranged in two layers. In addition, inside the lid handle 122a, the first power receiving coil 122d and the second power receiving coil 122e disposed on a different layer from the first power receiving coil 122d may be arranged in a double layer.

6 and 8, unlike the embodiment in which the power transmitting coil and the power receiving coil are arranged in double layers, in another embodiment of the present invention, the power transmitting coil and the power receiving coil are each triple or more layers may be composed of

As shown in FIG. 8 , when the power transmitting coil and the power receiving coil are respectively arranged in multi-layers, there is an advantage in that the amount of power transmitted to the power receiving coil by the power transmitting coil is higher.

9 is a cross-sectional view showing a state in which the lid of the rice cooker, the inner pot, and the rice cooker body are coupled according to another embodiment of the present invention.

The configuration of the electric pressure cooker shown in FIG. 9 is basically the same as the configuration of the electric pressure cooker shown in FIG. 5 . However, in the embodiment of FIG. 5 , the rice cooker body 200 has a cylindrical shape in which the radius of the cross section is the same in the vertical direction. However, in the embodiment of FIG. 9 , the body 200 has a cylindrical shape in which the radius of the cross-section decreases from the top to the bottom of the body 200 . In other words, the thickness of the outer surface of the main body 170 increases from the lower surface to the upper surface of the main body 170 .

In addition, the radius of the outer peripheral surface of the rice cooker lid 100 in FIG. 9 coincides with the radius of the upper surface of the rice cooker body 200 .

9, the power receiving coil (122d, 122e) receiving space is formed inside the outer surface of the rice cooker lid 100, and the power transmitting coil (122b, 122c) receiving space is formed inside the outer surface of the rice cooker body 200 do.

The positions of the power receiving coils 122d and 122e accommodating spaces correspond to the positions of the power transmitting coils 122b and 122c accommodating spaces. Accordingly, the positions of the power receiving coils 122d and 122e accommodated in the receiving space of the power receiving coils 122d and 122e are the positions of the power transmitting coils 122b and 122c accommodated in the receiving space of the power transmitting coils 122b and 122c. position and correspond to each other.

In the embodiment of FIG. 10 , the lid handle 122 is not disposed on one side of the rice cooker lid 100 , and the body handle 122a is not disposed on one side of the rice cooker body 200 . However, as shown in FIG. 8 , the lid handle 122 protruding in one direction is disposed on one side of the lid 100 , and the body handle 122a protruding in one direction is disposed on one side of the rice cooker body 200 . can

According to this arrangement, the distance between the center of the lower surface (or inner pot 201) of the rice cooker body 200 and the center of the power receiving coil (122d, 122e) accommodating space is greater than the radius of the lower surface of the main body 200.

9 and 10 , the power transmission coils 122b and 122c are not disposed inside the main body storage space 200a. Accordingly, there is no need to allocate a space for arranging the power transmission coils 122b and 122c inside the outer end of the rice cooker body 200 as in the conventional cooking appliance shown in FIG. 1 . As a result, as shown in FIG. 5 , the size of the inner space of the outer end inside the rice cooker body 200 is reduced compared to the prior art. Here, when the size of the inner space of the outer end decreases, the size of the remaining space of the inner space of the rice cooker body 200 except for the outer end increases. Therefore, since the size of the inner pot receiving space inside the rice cooker body increases compared to the prior art, the cooking capacity of the electric pressure cooker is increased.

11 is a cross-sectional view showing the coupling structure of the rice cooker body and the rice cooker lid shown in FIG. And, FIG. 12 is a cross-sectional view illustrating an arrangement structure of the power generating module in a state in which the inner cover and the first waterproof partition wall member of FIG. 11 are removed.

11 and 12 , in the inner non-waterproof space 100A of the rice cooker lid 100 , a poise valve 111 is disposed on the valve pipe passing through the inner pot cover 123 at the lower end, and steam is removed during cooking. eject On the other hand, the first waterproof space 100B is provided with a power generating module 300 that generates power by itself using the temperature difference between the surface temperature of the inner pot cover 123 at the lower end of the rice cooker lid 100 and the outside.

Specifically, the power generation module 300 is connected to the upper surface of the inner pot cover 123 located at the lowest end of the rice cooker lid 100 and the inner side of the rice cooker lid 100 and the inner cover 134 of the upper end. Consists of, using the temperature difference between the temperature of the inner pot cover 123 and the outer temperature of the top of the rice cooker cover 100 to generate power by itself.

12, the power generation module 300 includes the inner pot cover 123, the first waterproof partition member ( 129) may be configured to be in direct or indirect contact with the inner cover 134 of the side portion and the upper portion.

The power generation module 300 converts power generated by using the external temperature difference between the surface temperature of the inner pot cover 123 and the top of the rice cooker lid 100 to a power conversion circuit disposed in the first waterproof space 100B, an operation control circuit, It is supplied to at least one circuit such as a display panel and an interface panel, or an electric device such as a panel.

Referring to FIG. 13 , the power generation module 300 includes at least one thermoelectric element 310 , at least one low-temperature heat spreader 315 , at least one heat exchange pipe 320 , and at least one heat dissipation plate. 350 , and at least one insulating material 330 .

The thermoelectric element 310 is disposed on the inner pot cover 123 of the rice cooker lid 100 to generate an electromotive force according to a temperature difference between the temperature of the inner pot cover 123 and the outer temperature of the rice cooker lid 100 . In addition, the electric power generated according to the temperature difference between the temperature of the inner pot cover 123 and the external temperature is transmitted to the electric devices disposed inside the first waterproof partition wall member 129 .

The thermoelectric element 310 is a low-temperature electrode disposed to face the high-temperature electrode part 311 with the high-temperature electrode part 311 in contact with the inner pot cover 123 and the P/N junction semiconductor 312 for power generation therebetween. part 313 .

The thermoelectric element 310 converts the power generated in the P/N junction semiconductor 312 according to the temperature difference between the temperature of the high temperature electrode part 311 and the low temperature electrode part 313 to the power disposed in the first waterproof space 100B. at least one circuit, such as a circuit, an operation control circuit, a display panel, and an interface panel, or an electric device such as a panel. Also, the thermoelectric element 310 may charge the battery by transmitting power generated from the P/N junction semiconductor 312 to a battery disposed together with at least one circuit or an electric device such as a panel.

The low-temperature heat diffusion plate 315 is disposed on and in contact with the low-temperature electrode part 313 of the thermoelectric element 310 to diffuse heat of the low-temperature electrode part 313 . Here, the low-temperature heat diffusion plate 315 is configured so that the heat of the low-temperature electrode part 313 can be lowered as quickly as possible by the external temperature transferred through the at least one heat exchange pipe 320 . To this end, the low-temperature heat diffusion plate 315 may be formed to have a larger area than the low-temperature electrode part 313 of the thermoelectric element 310 and to be thicker. The thermoelectric element 310 and the low-temperature heat diffusion plate 315 may be formed and disposed at the lower end of the first waterproof partition wall member 129 forming the first waterproof space 100B.

The heat exchange pipe 320 is bent at least once so that one end in the inner direction is in contact with the upper surface of the low temperature heat spreader 315, and the other end in the outer direction extends in the side and upper direction of the cooker lid 100 . is made up of The heat exchange pipe 320 may include at least one heat pipe or a thermosyphon.

Specifically, in the heat exchange pipe 320 , the heat of the low-temperature heat diffusion plate 315 and the thermoelectric element 310 is rapidly generated by the temperature of the heat dissipation diffusion plate 350 disposed on the upper end or side portion of the cooker lid 100 . designed to be lowered. As an example, the heat exchange pipe 320 is 'a'. The heat dissipation diffusion plate 350 and the inner pot cover 123 are formed in various shapes such as 'b', 'c', 'ㄹ' or combinations of these shapes, and are disposed on the upper end or side part of the rice cooker lid 100 . ) is configured to be physically connected to the low-temperature heat spreader plate 315 disposed on. Here, the heat exchange pipe 320 is illustrated as an example configured in the form of a plurality of pipes, but may be configured in the form of a flat plate.

12 and 13, the heat exchange pipe 320 is 'a'. The inner side surface of the rice cooker lid 100 from the low-temperature heat diffusion plate 315 disposed on the inner pot cover 123 by being formed in shapes such as 'b', 'c', 'ㄹ' or a combination of the above shapes. It is configured to be physically connected to the heat dissipation diffusion plate 350 disposed on the upper end.

In addition, the heat exchange pipe 320 is 'a' according to the shape of the lower end and side of the first waterproof partition wall member 129 forming the first waterproof space 100B. Formed in a shape such as 'b', 'c', 'd' or a combination of the above shapes, the thermoelectric element 310, the low-temperature heat diffusion plate 315, and the heat dissipation diffusion plate 350 are physically It may be formed to be connected.

The heat dissipation diffusion plate 350 is configured to be in contact with the other side end of the heat exchange pipe 320 in the outside direction, so that the heat of the thermoelectric element 310 transferred through the heat exchange pipe 320 is the heat of the rice cooker lid 100 . It is configured so that it can be discharged to the top and to the outside. In other words, the heat dissipation diffusion plate 350 is configured so that the heat of the heat exchange pipe 320 including the thermoelectric element 310 is lowered as quickly as possible by the external temperature. To this end, the heat dissipation diffusion plate 350 may be formed to have a larger area than the low temperature heat diffusion plate 315 and to be thicker. In addition, the heat dissipation diffusion plate 350 may be configured to be in physical contact with the transparent housing 133 or the inner cover 134 covered on the upper end of the rice cooker lid 100 .

When the heat dissipation diffusion plate 350 is in contact with the transparent housing 133 or the inner cover 134 , heat diffusion and emission efficiency may be further increased through the transparent housing 133 or the inner cover 134 .

At least one insulating material 330 is disposed on at least one side of each heat exchange pipe 320 to insulate each heat exchange pipe 320 . For example, the at least one insulating material 330 may include a first waterproof partition wall member 129 between the heat exchange pipe 320 and the rice cooker lid 100 , the heat exchange pipe 320 and the first waterproof space 100B are formed. ) and the like, respectively, to insulate the heat exchange pipe 320 .

Referring to FIG. 14, the electric pressure cooker uses an inner pot (201) and an inner pot cover (123) through a working receiving coil for each period such as soaking period (AH), cooking period (DH), steaming period (NH), and keeping warm. Increase and adjust the temperature (CT) of

For example, during the cooking period (DH) period, the temperature (CT) of the inner pot 201 and the inner pot cover 123 is raised to about 170 ° C, so that the temperature (BT) inside the inner pot 201 is raised to about 120 ° C. can be controlled

Accordingly, the difference between the external temperature AT and the temperature CT of the inner pot cover 123 may be maintained at about 140° C. or more during the period during which the cooking and keeping warm operations are performed. In this way, the power generating module 300 uses at least one thermoelectric element 310 for each period during which the soaking period (AH), the cooking period (DH), the steaming period (NH) and the keeping warm function are performed, the inner pot cover 123 ) generates an electromotive force according to the difference between the temperature (CT) and the external temperature (AT). In addition, the electric power generated through the at least one thermoelectric element 310 is supplied to an electric device or a battery of the first waterproof space 100B.

Referring to FIG. 15 , a display panel, an interface panel, a power conversion circuit or an operation control circuit are provided in the first waterproof space 100B formed in the assembly structure of the first waterproof partition wall member 129 and the first waterproof partition wall cover 131 . A mounted printed circuit board 112 , a battery, and the like may be disposed.

At least one of an AD converter, a DC-DC converter, a regulator, a rectifier circuit, and a boosting circuit, power conversion elements and circuits, and a microcontroller are formed and disposed on the printed circuit board 112 . Accordingly, using a DC-DC converter, a rectifier circuit, and a microcontroller, the power input from the thermoelectric element 310 is converted to charge the battery, or the display panel, interface panel, power conversion circuit or operation control circuit is used. can supply

Referring to FIG. 16 , a low-temperature heat diffusion plate 315 is disposed on the low-temperature electrode part 313 of the thermoelectric element 310 , and one end of the heat exchange pipe 320 in the inner direction has a low-temperature heat diffusion plate 315 . ) in contact with the upper surface, the other side end of the outer direction may be configured in a bent form to extend along the side of the rice cooker lid (100). That is, the heat exchange pipe 320 may be formed in a 'B' shape so that the low-temperature heat diffusion plate 315 and the inner side surface of the rice cooker lid 100 are connected.

In addition, the heat dissipation diffusion plate 350 may be formed in a 'L' shape along the upper end and side portions of the rice cooker lid 100 . Accordingly, the other end of the heat exchange pipe 320 is in contact with the side portion of the heat dissipation diffusion plate 350 , so that the heat of the low temperature heat diffusion plate 315 and the thermoelectric element 310 is transferred to the upper end and side portions of the cooker lid 100 . It may be configured to be rapidly lowered by the temperature of the heat dissipating diffusion plate 350 disposed on the . As described above, the heat exchange pipe 320 is illustrated as an example configured in the form of a plurality of pipes, but may be configured in the form of a flat plate.

The heat dissipation diffusion plate 350 is formed to have a larger area than the low temperature heat diffusion plate 315 and to be thicker so that the heat of the heat exchange pipe 320 including the thermoelectric element 310 is lowered as quickly as possible by the external temperature. can be In addition, the heat dissipation diffusion plate 350 may be configured to be in physical contact with the transparent housing 133 or the inner cover 134 covered on the upper end of the rice cooker lid 100 .

At this time, the at least one insulating material 330 may be disposed between the heat exchange pipe 320 and the side surface of the rice cooker lid 100 to insulate the heat exchange pipe 320 .

Referring to FIG. 17 , a low-temperature heat diffusion plate 315 is disposed on the low-temperature electrode part 313 of the thermoelectric element 310 , and one end of the heat exchange pipe 320 in the inner direction has a low-temperature heat diffusion plate 315 . ) in contact with the upper surface, and the other side end of the outer direction may be configured to extend and bend along the side and upper surface of the rice cooker lid 100 . That is, the heat exchange pipe 320 may be formed in a 'C' shape so that the low-temperature heat diffusion plate 315 and the inner side of the rice cooker lid 100 and the upper surface of the rice cooker lid 100 are connected.

In this case, the heat exchange pipe 320 may be configured and disposed in a form that surrounds a portion of the lower surface, the side surface, and the upper surface of the first waterproof partition wall member 129 forming the first waterproof space 100B.

In addition, the heat dissipation diffusion plate 350 may be configured in a flat plate shape so as to be in contact with the upper surface of the other end of the heat exchange pipe 320 at the upper end of the rice cooker lid 100 . Accordingly, in the heat dissipation diffusion plate 350 , the heat of the low temperature heat diffusion plate 315 and the thermoelectric element 310 is rapidly generated by the temperature of the heat dissipation diffusion plate 350 disposed on the upper end and side portions of the cooker lid 100 . can be made lower. The heat dissipation diffusion plate 350 may be configured to be in physical contact with the transparent housing 133 or the inner cover 134 covered on the upper end of the rice cooker lid 100 .

At this time, the at least one insulating material 330 is formed between the heat exchange pipe 320 and the side surface of the rice cooker lid 100, the heat exchange pipe 320 and the first waterproof partition wall member 129 forming the first waterproof space (100B). ) may be disposed between each to insulate the heat exchange pipe 320 .

Referring to FIG. 18 , a low-temperature heat diffusion plate 315 is disposed on the low-temperature electrode part 313 of the thermoelectric element 310 , and the heat dissipation diffusion plate 350 includes a low-temperature heat diffusion plate 315 and a thermoelectric element ( It is configured so that the heat of the 310 can be quickly lowered by the temperature of the heat dissipating diffusion plate 350 disposed on the upper end or side of the rice cooker lid 100 .

For example, one end of the heat dissipation diffusion plate 350 is in contact with the thermoelectric element 310 or the low-temperature heat diffusion plate 315, and the other end is the inner side of the rice cooker lid 100 and the rice cooker lid 100 . The transparent housing 133 or inner cover 134 disposed on the upper end of the bent so as to connect and contact. Here, the heat dissipation diffusion plate 350 may be configured in the form of a flat plate bent at least once.

As shown in the fourth embodiment, the heat exchange pipe 320 is not used in the power generation module 300 , and the low temperature heat spreader plate 315 is used instead of the heat exchange pipe 320 by using the heat dissipation diffusion plate 350 . ) and the inner cover 134 may be physically connected.

As such, when using the heat dissipation diffuser plate 350 without using the heat exchange pipe 320 , a block or pad type vapor chamber 320a is additionally disposed on the heat dissipation diffuser plate 350 . can do.

That is, by configuring the vapor chamber 320a to be seated on a portion of the upper surface of the heat dissipation diffusion plate 350 or the vapor chamber 320a to be in contact with at least one side of the heat dissipation diffusion plate 350 , heat emission is diffused. The heat diffusion efficiency of the plate 350 may be improved.

As described above, the induction heating type electric pressure cooker having the power generation module 300 according to the embodiment of the present invention generates power by itself using the internal heating temperature and the external temperature difference according to cooking operations such as cooking and keeping warm. can be created and used. Accordingly, it is possible to improve user satisfaction and reliability by allowing cooking operations such as cooking and keeping warm for a predetermined period even when external power is cut off.

In addition, according to the present invention, various electric devices such as a user interface device and a display panel can be formed on the rice cooker lid 100 even in a structure in which the rice cooker body 200 and the lid are separated, thereby satisfying the user's convenience and requirements. can do it

In addition, according to the present invention, it is possible to further increase the durability and stability of the electric pressure cooker by increasing the heat preservation and cooling efficiency of the operation control circuit such as the display panel built in the rice cooker lid 100 .

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in the present specification. It is obvious that variations can be made. In addition, although the effect of the configuration of the present invention has not been explicitly described and described while describing the embodiment of the present invention, it is natural that the effect predictable by the configuration should also be recognized.

Claims

an inner pot defining a cooking space;

a rice cooker body for inductively heating the inner pot using a working receiving coil installed to surround the inner pot; and

and a rice cooker lid that opens and closes the upper open portion of the inner pot by being separated from the upper open portion of the rice cooker body or fastened to the upper open portion,

At least one sealed waterproof space and a non-waterproof space with an open side part are divided inside the lid of the rice cooker, and the non-waterproof space generates electric power using the temperature difference between the temperature of the inner pot cover surface and the outside of the lid of the rice cooker. an induction heating electric pressure cooker comprising a power generating module;
The method of claim 1,

An electric device including at least one circuit or panel of a power conversion circuit, an operation control circuit, a display panel, and an interface panel, and a battery are disposed in the first waterproof space of the at least one waterproof space,

At least one sensor including a temperature sensor, a solenoid valve, and a non-return device are configured to correspond to the second waterproof space among the at least one waterproof space,

The power generation module disposed in the non-waterproof space is an induction heating type electric pressure cooker for supplying power generated by the temperature difference between the surface temperature of the inner pot cover and the outside to one of the electric device and the battery.
The method of claim 1,

The power generation module is

The upper surface of the inner pot cover located at the lowest end of the rice cooker lid is configured to be connected to the inner side of the rice cooker lid and the inner cover of the upper end, and the temperature of the inner pot cover and the temperature difference outside the top of the rice cooker lid An induction heating electric pressure cooker that generates electric power according to
The method of claim 1,

The power generation module is

Induction heating type electric pressure cooker configured to indirectly contact the inner pot cover at the bottom surface position of the first waterproof partition wall member forming the waterproof space, the side portion of the first waterproof partition wall member, and the inner cover of the top of the rice cooker lid with a heat insulating material therebetween .
The method of claim 1,

The power generation module is

at least one thermoelectric element for generating and outputting an electromotive force according to the temperature difference between the inner pot cover temperature of the rice cooker cover and the outside;

at least one low-temperature heat diffusion plate in contact with the low-temperature electrode of the thermoelectric element to diffuse heat of the low-temperature electrode;

at least one heat exchange pipe having one side end in contact with the low-temperature heat diffusion plate and the other end bent so as to extend in the side and upper directions of the lid of the rice cooker; and

An induction heating type electric pressure cooker comprising at least one heat dissipation diffusion plate that is in contact with the other end of each heat exchange pipe and radiates heat transferred to each heat exchange pipe to the top and outside of the lid of the rice cooker.
6. The method of claim 5,

The heat exchange pipe is

Induction heating type 'a'. At least one of 'b', 'c', and 'ㄹ' or a combination of the at least one shape is formed in the heat dissipation diffusion plate and the inner pot cover disposed on the upper end or side part of the rice cooker lid. An electric pressure cooker that physically connects the placed low-temperature heat spreaders.
6. The method of claim 5,

The heat exchange pipe is

According to the shape of the lower end and the side surface of the first waterproof partition wall member forming the waterproof space, 'a'. An induction heating type electric pressure that physically connects the thermoelectric element, the low-temperature heat spreader plate, and the heat dissipation diffusion plate by forming a shape such as 'b', 'c', or 'ㄹ' or a combination of the above shapes. rice cooker.
6. The method of claim 5,

The heat dissipation diffusion plate is formed in a 'L' shape along the side portion from the upper inner cover or the transparent housing of the lid of the rice cooker,

The heat exchange pipe is formed by being bent in a 'L' shape so as to be in contact with the heat dissipation diffusion plate in the inner side direction of the lid of the rice cooker from the low-temperature heat diffusion plate, whereby the thermoelectric element, the low-temperature heat diffusion plate, and the heat exchange An induction heating type electric pressure cooker in which the pipe, the heat dissipation diffuser, and the inner cover or the transparent housing are physically connected.
6. The method of claim 5,

The heat exchange pipe is

One end in the inner direction is in contact with the upper surface of the low-temperature heat diffusion plate, and the other end in the outer direction is extended and bent along the heat dissipation diffusion plate of the side and upper surface of the cooker lid to form a 'c' shape. ,

An induction heating type electric pressure cooker configured and arranged in a form to surround a portion of the lower surface, the side surface, and the upper surface of the first waterproof partition wall member forming the waterproof space.
The method of claim 1,

The power generation module is

at least one thermoelectric element for generating and outputting an electromotive force according to the temperature difference between the inner pot cover temperature of the rice cooker cover and the outside;

at least one low-temperature heat diffusion plate in contact with the low-temperature electrode of the thermoelectric element to diffuse heat of the low-temperature electrode; and

at least one heat dissipation diffusion plate configured to extend upwardly of the low-temperature heat diffusion plate and the lid of the rice cooker to dissipate heat from the at least one thermoelectric element and the low-temperature heat diffusion plate to the top and the outside of the lid of the rice cooker; Induction heating electric pressure cooker.
11. The method of claim 10,

The heat dissipation diffuser is

One end is in contact with the thermoelectric element or the low-temperature heat diffusion plate, and the other end is extended and bent to connect and contact with the inner side of the cooker lid, and the transparent housing or inner cover disposed on the upper end of the cooker lid. Constructed induction heating electric pressure cooker.
12. The method of claim 11,

The power generation module is

Induction heating electric pressure cooker further comprising a block or pad type vapor chamber configured to be seated on a portion of the upper surface of the heat dissipation diffusion plate or to be in contact with one side.
The method of claim 1,

a power transmission coil disposed inside the main body handle formed on one side of the rice cooker body and receiving power transmitted from the outside; and

and a power receiving coil disposed inside a lid handle formed on one side of the rice cooker lid and receiving power transmitted by the power transmitting coil,

At least one electronic device included in the lid of the rice cooker is an induction heating type electric pressure cooker driven by the power received by the power receiving coil.
14. The method of claim 13,

The rice cooker lid is rotationally coupled to the rice cooker body,

When the lid of the rice cooker is combined with one surface of the rice cooker body to seal the receiving space of the inner pot, the power transmission coil and the power reception coil are completely overlapped with each other induction heating type electric pressure cooker.
14. The method of claim 13,

The lid of the rice cooker is an induction heating type electric pressure cooker that is a detachable lid that is completely separated from the main body of the rice cooker.
14. The method of claim 13,

The amount of power delivered to the one or more electronic devices is an induction heating type electric pressure cooker that is proportional to an overlapping area of the power transmitting coil and the power receiving coil.