JP2016018775A - Jump induction under-range - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow for heating even if a cooking vessel is located while spaced apart upward from a table upper surface.SOLUTION: A jump induction under-range includes an induction heating unit 10 arranged under a table upper surface P, and for heating a cooking vessel, and a drive system 20 for driving the induction heating unit 10 to generate a magnetic field and to heat the cooking vessel. The drive system 20 includes a L-C series resonance circuit. A magnetic field is generated by induction resonance of the L-C series resonance circuit, and the cooking vessel spaced apart upward from the table upper surface is heated by the induction heating unit 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an induction underrange (induction heating type lower arrangement range) for cooking food, and more particularly to a jump induction underrange in which a cooking container is floated on a table upper surface where an induction underrange is arranged so that it can be used. .

  In order to cook food in the kitchen, a gas range is generally used. However, the gas range may cause a food or cooking container to burn or cause a fire in the kitchen due to a momentary mistake.

  In order to improve such problems, an underrange of a high frequency induction heating method has recently been developed and is in the limelight. This underrange amplifies the high frequency magnetic field range up to 65 mm by a high frequency induction heating method.

  Since the high frequency magnetic field range can pass through the thickness of the table or table, it is placed under the table or table to inductively heat the table or table container. In addition, the underrange is relatively safe in the risk of direct burn and fire due to fire like the gas range.

  Furthermore, the direct heating method with no combustion action has the advantage that it can be used comfortably because there is little oxygen consumption and no harmful gas generation. Therefore, the underrange is highly utilized not only for home use, but also in restaurants such as steak and chige specialty stores and grilled meat shops.

  In addition, the underrange can be used by being easily attached to the lower part of the table or table, so that it is very convenient in use compared to existing induction cooking utensils arranged on the table.

  However, since such a conventional underrange is a magnetic induction heating method, a cooking container such as a pan is brought into contact with the upper surface of the table or table, but if the cooking container is lifted from the upper surface, circuit characteristics The output decreases or the cooking container is not heated. In addition, when the table or table top is overheated, there is a possibility that the user may be burned. In addition, when the table or table is mounted on the table or table, there is a problem that the table must be inserted through the mounting position.

  The present invention was developed in order to improve the problems of the conventional induction heating range as described above, and the cooking container is lifted by a certain height from the upper surface of the table to be heated by changing the heating method. An object of the present invention is to provide a jump induction underrange that can adjust the height of the cooking container from the upper surface of the table.

  In order to achieve the above object, the present invention provides an induction heating unit that is disposed at a lower portion of a table upper surface and heats the cooking container in a separated state, and generates a magnetic field in the induction heating unit to heat the cooking container. The drive system includes an L-C series resonance circuit, generates a magnetic field by induction resonance by the L-C series resonance circuit, and places the cooking container on the table top surface by the induction heating unit. It is characterized by being configured to be able to heat even in a state where it is spaced upward from.

  Here, the drive system includes an overheating prevention unit that interrupts heating by the induction heating unit when the cooking container is overheated, and this overheating prevention unit is an L− that changes as the cooking container reaches or exceeds the overheating reference temperature. When the resonance frequency change width of the C series resonance circuit is equal to or greater than the critical point, the heating by the induction heating unit may be cut off, and the drive system is driven by bidirectional radio frequency (RF) communication. As shown, a remote controller including a bidirectional RF communication unit may be included.

  In addition, a moving rail capable of sliding (sliding position movement) the induction heating unit is provided at the lower part of the upper surface of the table, and the cooking container is placed at an appropriate position where it can be heated by the induction heating unit. In addition, it is preferable to further include a notification unit that informs one of voice, melody, and LED light emission.

  The present invention can be used by floating the cooking container at a certain height from the upper surface of the table, and the induction heating output can be adjusted by changing the resonance frequency, so that the height of the cooking container can be easily increased from the surface of the table. Can be adjusted. Therefore, according to the present invention, it is possible to prevent burns due to overheating of the table upper surface, and there is an effect that convenience in use is increased.

FIG. 1 is a plan view of an embodiment of the present invention. FIG. 2 is a schematic perspective view of an embodiment of the present invention. FIG. 3 is a side view of the use state in which the cooking container is arranged in the embodiment of the present invention, FIG. 4 is a block diagram for the drive system constituting the present invention.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. However, if it is determined that a specific description of a known function or configuration involved in detailing the operating principle for the preferred embodiment of the present invention will unnecessarily cloud the gist of the present invention, the detailed description will be Omitted.

  While the invention is amenable to various modifications and alternative embodiments, specific embodiments will be shown by way of example in the drawings and will be described in detail. However, this should not be construed as limiting the invention to the specific embodiments, but includes all modifications, equivalents or alternatives that fall within the spirit and scope of the invention. Don't be.

  FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a schematic perspective view of the embodiment of the present invention, and FIG. 3 is a side view of a use state in which a cooking container is arranged in the embodiment of the present invention. FIG. 4 is a block diagram for the drive system constituting the present invention.

  As shown in FIGS. 1 to 4, the embodiment of the jump induction underrange according to the present invention is arranged at the lower part of the table upper surface (P) to heat the cooking container (V) in a separated state. (10) and a drive system (20) that generates a magnetic field in the induction heating unit (10) to heat the cooking container (V).

  The induction heating unit (10) includes a coil (11) that is operated by the drive system (20) and heats the cooking container (V) such as a pan with a magnetic field generated by an electromagnetic induction phenomenon.

  In particular, the cooking container (V) is not in direct contact with the induction heating unit (10), and the cooking container (V) is arranged by the supporting means (S) arranged on the table upper surface (P) as shown in FIG. The cooking container (V) is induction-heated in a state where V) floats above the table upper surface (P) at a certain height, for example, 2 to 20 cm or more. Here, in this specification, the induction underrange of the present invention is referred to as “jump induction underrange”.

  In order to cause the induction heating unit (10) to inductively heat the cooking container (V) in a state where the cooking container (V) is lifted from the table upper surface (P) by a certain height or more, the drive system (20 ) Is configured as follows.

  First, the drive system (20) includes a rectification unit (21) for rectifying electric power supplied from the outside so that the entire drive system (20) can be operated. The rectifier (21) converts an input alternating current (AC) power source into a direct current (DC) power source. At the same time, the rectifying unit (21) is connected to a filter unit (22) for filtering noise of the input power source, for example, noise flowing from a normal power source of AC220V / AC110V.

  The drive system (20) also includes a resonant inverter (23) that heats the inside of the induction heating unit (10) by applying a high frequency to generate magnetic flux. The resonant inverter (23) includes a switching unit (23a) and an L-C series resonant circuit (23b). Here, L is an inductor, and C is a capacitor. The switching unit (23a) is a module type that takes into account the withstand voltage and capacity, and includes an IGBT (Insulated Gate Bipolar Transistor) that is a semiconductor switching element for power conversion.

  In order to drive the IGBT of the switching unit (23a), 2ED020I12-F2 manufactured by Infineon Technology, which is an integrated circuit (IC) for driving the IGBT, is used.

  The L-C series resonance circuit (23b) is a circuit that performs inductive resonance that can increase the range of the magnetic field, and the resonance current capacity can be increased by using the IGBT switching unit (23a). Therefore, induction heating can be performed even when the cooking container (V) is spaced upward from the table upper surface (P).

  The drive system (20) includes an MCU (Micro Control Unit) for controlling the rectifying unit (21), the filter unit (22), the resonant inverter (23), and the like, that is, a control unit (24).

  The control unit (24) includes the product name “Atmega128”. The control unit (24) can adjust the heating temperature of the induction heating unit (10) by controlling the resonance frequency of the resonance inverter (23). As the resonance frequency is lower, a larger (closer to the maximum value) current is output and the heating temperature is higher, and as the resonance frequency is higher, a smaller (closer to the minimum value) current is output and the heating temperature is lower.

  In the jump induction underrange of the present invention, an inductance value exists between the coil (11) of the induction heating unit (10) and the cooking vessel (V) as an important variable of the output (heating temperature) of the induction heating unit (10). To do.

  That is, the inductance value between the coil (11) and the cooking container (V) differs depending on the type of the cooking container (V). Moreover, an inductance value changes also with the height of the cooking vessel (V) with respect to the induction heating part (10).

  In general, when the inductance value is increased, the resonance frequency is decreased, and the output is decreased as the distance from the switching frequency of the switching unit (23a) is decreased. On the contrary, when the inductance value is decreased, the output is increased.

  In the present invention, the switching frequency is changed according to the type of the cooking vessel (V) and the height with respect to the induction heating unit (10), that is, by changing the inductance value, and inductively heated in cooperation with the resonance frequency of the resonance type inverter (23). The output of the part (10) can be adjusted.

  On the other hand, when the cooking vessel (V) is overheated, the drive system (20) includes an overheat prevention unit (25) that cuts off the heating by the induction heating unit (10). That is, this overheat prevention part (25) is controlled when the resonance frequency change width of the LC series resonance circuit (23b), which changes when the cooking vessel (V) is at or above the overheat reference temperature, is above the critical point. The heating by the induction heating unit (10) is cut off by the control of the unit (24).

  If the table top surface (P) is glass, it is possible to prevent overheating of the cooking container (V) by using a temperature sensor or a thermal fuse, but the table top surface (P) is like a stone, wood or air layer. When it is difficult to touch the surface, it is difficult to perform the overheat prevention function.

  Therefore, in the present invention, the output value change due to the temperature change of the cooking container (V) is used. When there is food in the cooking container (V), the change in output is fine, but when there is no food and only the cooking container (V) is heated, the range of the change is abrupt.

  When the cooking container (V) is heated and the temperature becomes a certain temperature or more, a plurality of variables including the inductance value change, and as a result, the resonance frequency changes and the output changes. Therefore, when the change in the output is monitored and the change width is large, the overheat prevention mode of the cooking container (V) is operated.

  Next, the drive system (20) includes a bidirectional radio frequency communication unit (26) so as to be driven by bidirectional radio frequency (RF) communication.

  That is, when the jump induction underrange according to the present invention is mounted on a table or the like, the operation unit that is the induction heating unit is not seen and the adjustment of the operation and output is not easy, but the two-way radio frequency communication unit (26) is provided. If it uses, control can be performed simultaneously with a user recognizing via the remote control which mounts a bidirectional | two-way radio frequency communication part (26) whether the operation | movement availability of an induction heating part (10) and an output change are mounted. Become. At this time, the remote controller is configured by wire or wireless.

  A moving rail that can slide the induction heating unit horizontally is provided at the lower part of the upper surface of the table. And the alerting | reporting part which notifies by one or more among an audio | voice, a melody, and LED light emission when the cooking container is put in the appropriate position which can be heated with the induction heating part is comprised.

  That is, in this embodiment, the induction heating unit (10) mounted on one panel together with the drive system (20) is moved along the moving rail (30) provided below the table upper surface (P). The lower part of the upper surface (P) slides in the left-right or front-back direction.

  At this time, the support rail (S) moves the moving rail so as to face the bottom surface of the cooking container (V) disposed on the left or right of the induction heating unit (10) on the table upper surface (P). The induction heating unit (10) is moved along (30), and the induction heating unit (10) can be positioned so as to face the bottom surface of the cooking container (V).

  In this way, when the bottom surface of the cooking container (V) and the induction heating unit (10) face each other at an accurate position, the notification unit (27) senses this and uses the voice, melody or LED light emission for the user. It is configured so that it can be recognized.

  In particular, if the size of the output signal of voice, melody, or LED light emission changes depending on the accuracy with which the bottom of the cooking container (V) and the induction heating unit (10) face each other, the user can easily recognize this. And the precision which the bottom face of a cooking container (V) and the induction heating part (10) oppose can be adjusted easily.

  Thus, according to the jump induction underrange of the present invention, the L-C series resonance circuit (23b) that performs inductive resonance that can increase the range of the magnetic field is used to remove the cooking container (V) from the table top surface ( It is possible to heat even in a state of being spaced upward from P).

  At this time, the container which can be used can heat not only a metal container like a pot but also a container in which an aluminum thin plate is mounted inside a paper cup.

  In addition, according to the jump induction underrange of the present invention, the heating frequency of the induction heating unit (10) is adjusted by controlling the resonance frequency of the resonance type inverter (23) having the LC series resonance circuit (23b). Therefore, the height of the cooking container (V) located on the table upper surface (P) can be easily adjusted.

  Therefore, the present invention can prevent burns due to overheating of the table top surface (P), and has the effect of increasing convenience in use.

DESCRIPTION OF SYMBOLS 10: Induction heating part 11: Coil 20: Drive system 21: Rectification part 22: Filter part 23: Resonance type inverter 23a: Switching part 23b: LC series resonance circuit 24: Control part 25: Overheat prevention part 26: Bidirectional Radio frequency communication unit 27: notification unit 30: moving rail P: table top surface S: support means V: cooking container

Claims (4)

An induction heating unit arranged at the lower part of the table top surface and heating in a state where the cooking container is separated;
A drive system for generating a magnetic field in the induction heating unit to heat the cooking container,
The driving system includes an L-C series resonance circuit, generates a magnetic field by induction resonance by the L-C series resonance circuit, and the induction heating unit separates the cooking container from the table upper surface by 2 to 20 cm. Jump induction underrange, characterized in that it can be heated even in a heated state.   The drive system includes an overheating prevention unit that interrupts heating by the induction heating unit when the cooking container is overheated, and the overheating prevention unit changes when the cooking container is at or above the overheating reference temperature. 2. The jump induction underrange according to claim 1, wherein when the resonance frequency change width of the C series resonance circuit is equal to or greater than a critical point, heating by the induction heating unit is interrupted.   2. The jump induction underrange according to claim 1, wherein the drive system includes a remote controller including a bidirectional radio frequency communication unit so as to be driven by bidirectional radio frequency communication.   A moving rail capable of sliding the induction heating unit is provided at the lower part of the upper surface of the table, and when the cooking container is placed at an appropriate position where it can be heated by the induction heating unit, a voice is heard. The jump induction underrange according to claim 1, further comprising a notification unit that informs one of melody and LED light emission.