JP5022277B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker that displays a position where an object to be heated is placed on a top plate.

  An induction heating cooker that induction-heats an object to be heated such as a pan with a heating coil has been widely used in recent years because of its excellent features of safety, cleanliness, and high efficiency. Patent Document 1 discloses an induction heating cooker that displays the vicinity or part of the outer periphery of a heating coil by display means when power is turned on. This makes it possible for the user to know whether or not the power is turned on, and also makes it easy to clearly recognize the place (heating unit) where the object to be heated is placed, which is convenient.

JP 2001-297863 A

  In the induction heating cooker described in Patent Document 1, the vicinity of the outer periphery of the heating coil is displayed by the display means in such a manner that the heating unit and the heating coil correspond one-to-one. In such a configuration, for example, when a heated object having a large pot bottom diameter is placed on two concentric heating coils and heated, the heating unit is displayed twice. In addition, when one large oval pan (elliptical pan) is placed on two adjacent heating coils that are not concentric and heated, the two heating units are displayed separately. Therefore, when one object to be heated is heated by two or more heating coils, there is a problem that it is difficult for the user to recognize where to place the object to be heated.

  This invention solves the said subject, In the induction heating cooking appliance which can heat one to-be-heated object with two or more heating coils, the induction heating cooking appliance which can display the position of a heating part clearly is provided. The purpose is to provide.

  An induction heating cooker according to the present invention includes a top plate formed of a material that transmits light, and a plurality of heating coils that generate an alternating magnetic field and induction-heat an object to be heated placed on the top plate. A control unit for controlling the current flowing in the heating coil, an operation unit for inputting a command related to heating control of the object to be heated, and a plurality of light emitting units provided in the vicinity of the outer periphery of the heating coil, The control unit includes a heating control unit that supplies a high-frequency current to the heating coil based on an input from the operation unit, and a light emission control unit that controls light emission of the light emitting unit, and operates in conjunction with the plurality of heating coils. When the power of the main body is turned on by the operation unit, the plurality of heating coils that are operated in conjunction with the vicinity of the outer periphery of the heating coil that can be operated independently while the operations of the plurality of heating coils are stopped. Addition As to sequentially emit light to the vicinity of the outer circumference of the coil, and having a heating area sequential display mode for lighting the light-emitting portion.

  When a command for the heating coil is input from the operation unit during the heating area sequential display mode, the control unit emits light so as to emit light near the outer periphery of a single heating coil to be commanded or a plurality of linked heating coils. The part may be turned on and the mode may be shifted to a heating mode in which a heating operation based on the command is performed.

  In the case where light is emitted in the vicinity of the outer periphery of two or more heating coils configured to be concentric in the center, the control unit is provided in the vicinity of the outer periphery of the outer heating coil among the two or more heating coils. When only the light emitting unit is turned on and the vicinity of the outer periphery of two or more adjacent heating coils whose centers are not concentric is emitted, the control unit is provided with a light emitting unit provided near the outer periphery of each of the two or more heating coils. Of these, the light emitting units arranged between the plurality of interlocking heating coils may be turned off, and the light emitting units other than the turned off light emitting units may be turned on.

  The operation unit includes a demo mode setting unit. If the demo mode setting unit sets the demo mode before the main unit is turned on, the command is input from the operation unit after the power is turned on. Even in this case, the control unit may not energize the heating coil.

  The induction heating cooker of the present invention has a heating unit that is heated by two or more heating coils, and sequentially emits light near the outer periphery of the plurality of heating units after the power is turned on. Thereby, the user can recognize the kind (size and position) of the heating unit before heating. Moreover, the induction heating cooking appliance of this invention will light-emit the outer periphery vicinity of a corresponding heating part, if the command which starts a heating is input. Thereby, even when one object to be heated is heated by two or more heating coils, the vicinity of the outer periphery of the interlocking heating coil emits light. Where should the user place the object to be heated? It becomes easy to recognize.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same number is attached | subjected about the same component.

[Configuration of induction heating cooker]
In FIG. 1, the top view of the induction heating cooking appliance by embodiment of this invention is shown. A first heating unit 2 that is provided with a top plate 1 made of crystallized ceramic that transmits light on the top of the induction heating cooker of the present embodiment, and places and heats an object to be heated on the top plate 1; A second heating unit 3, a third heating unit 4, a fourth heating unit 5, and a fifth heating unit 6 are provided. The first heating unit 2 is a heating unit for a heated object having a small pot bottom diameter, and the second heating unit 3 is a heating unit for a heated object having a large pot bottom diameter. The area of each heating unit is displayed on the upper or lower surface of the top plate 1 by printing.

  Although not shown in FIG. 1, heating coils are provided below the top plate 1 and at positions corresponding to the first to fourth heating units 2, 3, 4, and 5, respectively. The heating coil corresponding to the second heating unit 3 is provided on the outer periphery of the heating coil corresponding to the first heating coil 2. When heating the second heating unit 3, the heating coil corresponding to the first heating coil 2 and the heating coil corresponding to the second heating unit 3 are operated together. When the fifth heating unit 6 is heated, the heating coil corresponding to the third heating unit 4 and the heating coil corresponding to the fourth heating coil 5 are operated in conjunction with each other. The fifth heating unit 6 is a region that is induction-heated when the heating coil corresponding to the third heating unit 4 and the heating coil corresponding to the fourth heating coil 5 are interlocked. The fifth heating unit 6 includes a third heating unit 4 and a fourth heating unit 5.

  A display unit 7 and an operation unit 8 are provided on the front side (user side) of the top plate 1. The operation unit 8 includes a power key 8a for switching on / off the power, heating keys 8b, 8c, 8d, 8e, 8f for switching heating on / off, and heating power adjustment keys 8g, 8h. The heating key 8 b is a key for operating the heating coil corresponding to the third heating unit 4 and the heating coil corresponding to the fourth heating unit 5 in conjunction with each other. The heating key 8 c is a key for operating the heating coil corresponding to the third heating unit 4. The heating key 8 d is a key for operating a heating coil corresponding to the fourth heating unit 5. The heating key 8 e is a key for operating the heating coil corresponding to the first heating unit 2 and the heating coil corresponding to the second heating unit 3 in conjunction with each other. The heating key 8 f is a key for operating the heating coil corresponding to the first heating unit 2. The display unit 7 includes five thermal power display units corresponding to the five heating keys 8b to 8f. The thermal power display unit displays the thermal power of the heating unit printed on the corresponding heating key as a number.

  Near the outer periphery of the first heating unit 2, first light emitting units 21 to 24 are provided. In the vicinity of the outer periphery of the second heating unit 3, second light emitting units 31 to 34 are provided. In the vicinity of the outer periphery of the third heating unit 4, third light emitting units 41 to 44 are provided. In the vicinity of the outer periphery of the fourth heating unit 5, fourth light emitting units 51 to 54 are provided. As described above, four light emitting units are provided for each heating unit.

  The first light emitting units 21 to 24 emit light in the outer peripheral region of the first heating unit 2. Thereby, the user can easily recognize the region where the object to be heated is to be placed on the first heating unit 2. The second light emitting units 31 to 34 emit light in the outer peripheral region of the second heating unit 3. Thereby, the user can easily recognize the region where the object to be heated is placed on the second heating unit 3. The third light emitting units 41 to 44 emit light in the outer peripheral region of the third heating unit 4. Thereby, the user can easily recognize the region where the object to be heated is to be placed on the third heating unit 4. The fourth light emitting units 51 to 54 cause the outer peripheral region of the fourth heating unit 5 to emit light. Thereby, the user can easily recognize the region where the object to be heated is placed on the fourth heating unit 5. The third light emitting units 41 and 44 and the fourth light emitting units 52 and 53 cause the outer peripheral region of the fifth heating unit 6 to emit light. Thereby, the user can easily recognize the region where the object to be heated is placed on the fifth heating unit 6.

  In FIG. 2, the structure of the induction heating cooking appliance by embodiment of this invention is shown. In FIG. 1, five heating units 2, 3, 4, 5, and 6 are illustrated, but in FIG. 2, three heating units 2, 3, and 4 are illustrated for convenience of explanation. The induction heating cooker of this embodiment includes a top plate 1, a display unit 7, and an operation unit 8 on the top plate. Below the top plate 1, a first heating coil 9 at a position corresponding to the first heating unit 2, a second heating coil 10 at a position corresponding to the second heating unit 3, and a third heating unit The third heating coil 11 is provided at a position corresponding to 4. Although the 1st heating coil 9 and the 2nd heating coil 10 are arrange | positioned concentrically, the 3rd heating coil 11 and the other heating coils 9 and 10 are not arrange | positioned concentrically. The first to third heating coils 9, 10, 11 generate induction magnetic fields and heat the objects to be heated 12, 13 placed on the top plate 1.

  Furthermore, the induction heating cooker according to the present embodiment includes a first inverter circuit 14 that supplies a high-frequency current to the first and second heating coils 9 and 10 below the first and second heating coils 9 and 10. And a second inverter circuit 15 for supplying a high-frequency current to the third heating coil 11 below the third heating coil 11. First light emitting units 21 and 23 (light emitting units 22 and 24 are not shown) in the vicinity of the outer periphery of the first heating coil 9, and second light emitting units 31 and 33 (in the vicinity of the outer periphery of the second heating coil 10). The light emitting units 32 and 34 are not shown), and the third light emitting units 41 and 43 (the light emitting units 42 and 44 are not shown) are provided in the vicinity of the outer periphery of the third heating coil 11. Furthermore, the induction heating cooker of this embodiment is provided with the control part 16 which controls the whole induction heating cooking appliance. The control unit 16 outputs a control signal to the inverter circuits 14 and 15 to control the high-frequency current supplied to the heating coils 9, 10, and 11 based on the input from the operation unit 8, and And a light emission control unit 16b for causing the light emitting units 21 to 24, 31 to 34, and 41 to 44 to emit light based on an input from the operation unit 8.

  FIG. 3 shows a configuration of the light emitting unit 21. One light emitting diode (hereinafter referred to as LED) 18 is provided on the substrate 17, and light emitted from the LED 18 passes through the light guide tube 19 and is output from the upper portion of the light guide tube 19. Then, this light causes the top plate 1 to emit light near the outer periphery of the heating unit on the top plate as shown in FIG.

[Operation of induction heating cooker]
The induction heating cooker of this embodiment has a heating part heated by one heating coil and a heating part heated by two heating coils, and the outer periphery of the heating part heated by two heating coils is a power source After the charging, light is emitted sequentially in the vicinity of the outer periphery of the plurality of heating units. When a command to start heating is input, the vicinity of the outer periphery of the corresponding heating unit is caused to emit light.

  FIG. 4 shows a flowchart of operation control of the light emitting unit by the induction heating cooker of the embodiment of the present invention. When the power key 8a is in the off state, the light emission control unit 16b turns off all the light emitting units. When the power key 8a is turned on by the user (Yes in S101), a heating area sequential display mode for sequentially emitting light in the vicinity of the outer periphery of each heating unit 2-6 is set (S102).

  For example, after emitting light as shown in FIG. 5 (first light emission example), light is emitted as shown in FIG. 6 (second light emission example), and finally as shown in FIG. 7 (third light emission example). Make it emit light. 5-7, the light-emission part is shown with an oblique line. The first light emission example (FIG. 5) is a light emission example in the case where one heated portion is placed on each of the first heating unit 2, the third heating unit 4, and the fourth heating unit 5 and heated. It is. The light emission control unit 16 b includes first light emitting units 21 to 24 near the outer periphery of the first heating unit 2, third light emitting units 41 to 44 near the outer periphery of the third heating unit 4, and the fourth heating unit 5. The 4th light emission parts 51-54 of the outer periphery vicinity are lighted. The second light emission example (FIG. 6) is a light emission example in the case where one heated portion is placed on each of the first heating unit 2 and the fifth heating unit 6 and heated. The light emission control unit 16 b includes the first light emitting units 21 to 24 near the outer periphery of the first heating unit 2, the third light emitting units 41 and 44 near the outer periphery of the fifth heating unit 6, and the fourth light emitting unit 52. , 53 are lit. The light emission control unit 16b does not turn on the third light emitting units 42 and 43 and the fourth light emitting units 51 and 54. The third light emission example (FIG. 7) is a light emission example in the case where one heated portion is placed on each of the second heating unit 3, the third heating unit 4, and the fourth heating unit 5 and heated. It is. The light emission control unit 16 b includes second light emitting units 31 to 34 in the vicinity of the outer periphery of the second heating unit 3, third light emitting units 41 to 44 in the vicinity of the outer periphery of the third heating unit 4, and the fourth heating unit 5. The 4th light emission parts 51-54 of the outer periphery vicinity are lighted. The light emission control unit 16b does not light the first light emitting units 21 to 24.

  When any one of the heating keys 8b to 8f is turned on by the user (Yes in S103), the mode is changed to the heating mode, and one object to be heated is heated by a plurality of heating coils based on the input from the user. It is determined whether or not to perform (S104). Here, the heating keys 8b and 8e (FIG. 1) are keys for heating by heating the two heating coils, and the heating keys 8c, 8d and 8f (FIG. 1) are operated by heating one heating coil. It is a key to do. Therefore, when any one of the heating keys 8b and 8e (FIG. 1) is turned on, the light emission control unit 16b determines to heat one object to be heated by the plurality of heating coils, and the heating keys 8c, 8d, When any one of 8f (FIG. 1) is turned on, it is determined that one heating object is heated by one heating coil. When the light emission control unit 16b determines that one object to be heated is heated by one heating coil (No in S104), the light emission control unit 16b has four light emitting units provided in the vicinity of the outer periphery of one heating coil that starts heating. Is turned on (S105).

  On the other hand, if the light emission control unit 16b determines that one object to be heated is heated by a plurality of heating coils (Yes in S104), the light emission control unit 16b is located near the outer periphery of the heating coil that performs heating operation in conjunction with the start of heating. The four light emitting units provided are turned on (S106). Specific examples are shown in FIGS. 8 and 9, the light emitting portion is indicated by hatching.

  FIG. 8 is a diagram showing an example of lighting of the light emitting unit when the heating key 8e is turned on to heat one object 61 arranged on the second heating unit 3. In FIG. The coils that are operated in conjunction with each other when the heating key 8e is turned on are the first heating coil 9 and the second heating coil 10. Therefore, the light emission control part 16b lights the 2nd light emission parts 31-34 near the outer periphery of the heating coil which starts a heating in response, and does not light the 1st light emission parts 21-24. Thereby, the vicinity of the outer periphery of the second heating unit 3 is caused to emit light. FIG. 9 is a diagram illustrating an example of lighting of the light emitting unit when the heating key 8b is turned on to heat one object 62 arranged on the fifth heating unit 6. In FIG. The coil operated when the heating key 8b is turned on heats the heating coil corresponding to the third heating unit 4 and the heating coil corresponding to the fourth heating unit 5 in conjunction with each other. Therefore, the light emission control unit 16b turns on the third light emitting units 41 and 44 and the fourth light emitting units 52 and 53 in the vicinity of the outer periphery of the heating coil that starts heating in conjunction with each other. The light emission control unit 16 b includes third light emitting units 42 and 43 and a fourth light emitting unit 51 arranged between the heating coil corresponding to the third heating unit 4 and the heating coil corresponding to the fourth heating unit 5. , 54 are not lit. Thereby, the outer periphery vicinity of the 5th heating part 6 is light-emitted.

  The heating control unit 16a controls to supply a high-frequency current to the heating coil based on the input from the user (S107). For example, when the heating key 8 e is turned on, the heating control unit 16 a supplies a high frequency current to the first heating coil 9 and the second heating coil 10. When the heating key 8 b is turned on, the heating control unit 16 a supplies a high frequency current to the heating coil corresponding to the third heating unit 4 and the heating coil corresponding to the fourth heating unit 5. Thereafter, when the heating key is turned off by the user (Yes in S108), the light emission control unit 16b turns off the light emitting unit of the heating coil that finishes heating (S109). The heating controller 16a stops the supply of high-frequency current to the heating coil (S110). Then, it waits until the heating key 8b is turned on (S103). Although the explanation is omitted, the on / off of the power key 8a is always monitored, and when the power key 8a is turned off, the mode immediately shifts to the power off mode, the heating operation and all the light emission displays are turned off, and the power switch is turned off. Wait for ON (S101).

  The induction heating cooker according to the present embodiment has a function of operating two heating coils in conjunction with each other to heat one object to be heated. After turning on the power, as shown in FIGS. Light is emitted sequentially in the vicinity of the outer periphery of the part. Thereby, the user can recognize the kind (size or position) of the heating unit before heating. That is, the user can easily recognize an area where the pan can be placed.

  Moreover, the induction heating cooking appliance of this invention will light-emit the outer periphery vicinity of a corresponding heating part, if a heating command is input. As a result, even when one object to be heated is heated by two or more heating coils, the vicinity of the outer periphery of the heating unit operating in conjunction is caused to emit light, so the user can place the object to be heated where It becomes easy to recognize whether it is good. Even if the user accidentally turns on another heating key, the heating unit that starts heating is accurately displayed on the top plate, so that the user is likely to notice a mistake.

[Modification 1]
As shown in FIG. 10, a demo key 8i may be added to the operation unit 8 of the induction heating cooker according to this embodiment. In this case, if the demo key 8i is continuously turned on for a long time (for example, 10 seconds) before any one of the heating keys 8b to 8f is turned on by the user (S103 in FIG. 4), the step of FIG. In S107, the heating control unit 16a enters a demonstration mode in which control is performed so that no high-frequency current is supplied to the heating coil. In the demo mode, even if the power is turned off or the power is turned on again, the demo mode is set based on the data stored in the storage element. Thus, when performing demonstration at a storefront or the like, it is safe because the high frequency current does not flow through the heating coil even if the power is turned off and then turned on again and the heating key 8e is operated. A demo mode display (not shown) may be provided for displaying the demo key 8i when it is pressed and in the demo mode. Further, as a demo mode transition operation unit for shifting to the demo mode, a switch may be provided in a place where it is difficult to see instead of providing the demo key 8i. In addition, the demo mode transition operation unit is configured by combining specific keys among the keys 8a to 8f, and performing a predetermined operation (for example, simultaneous pressing of three keys) to perform a demonstration from the normal heating mode. The mode may be shifted, or the demo mode may be shifted to the normal heating mode.

[Modification 2]
In the present embodiment, the light emitting unit has one single-color LED as shown in FIG. 3, but may have two or more single-color LEDs as shown in FIG. 11, or one single-color LED. May be. When lighting in two colors, the light emission control unit 16b lights the light emission unit in the first color in step S102 of FIG. 4, and in steps S105 and S106 of FIG. 4, the light emission control unit 16b sets the light emission unit to the second color. Light up with color.

  In addition, in this embodiment, although the some heating parts 2-6 are made to light-emit sequentially as shown in FIGS. 5-7 in FIG.4 S102, it does not restrict to this order. For example, you may make the some heating parts 2-6 light-emit one by one in order of the heating keys 8b-8f. The light emission may be repeated until the heating key is turned on.

  In the present embodiment, the light emission control unit 16b lights the light emitting unit, but it may blink.

  In the present embodiment, the plurality of light emitting units are divided into four parts and arranged around one heating coil so as to shine discretely as a whole with other light emitting units, but the number of divisions is changed. Alternatively, the adjacent light emitting units may be configured to contact each other so that the adjacent light emitting units continuously emit light.

  The induction heating cooker according to the present invention has an effect that it is easy for the user to recognize where to place the object to be heated even when the heating unit is heated by a plurality of heating coils. And it is useful for induction heating cookers used in general households.

The top view of the induction heating cooking appliance by the embodiment of the present invention. The block diagram of the induction heating cooking appliance by embodiment of this invention The block diagram of the light emission part of the induction heating cooking appliance by embodiment of this invention The flowchart of operation control of the light emission part by the induction heating cooking appliance of the embodiment of the present invention. The figure which shows the lighting example of the light emission part when light-emitting the some heating parts 2-6 sequentially in embodiment of this invention. The figure which shows the lighting example of the light emission part when light-emitting the some heating parts 2-6 sequentially in embodiment of this invention. The figure which shows the lighting example of the light emission part when light-emitting the some heating parts 2-6 sequentially in embodiment of this invention. The figure which shows the lighting example of the light emission part when the heating key 8e is turned on in embodiment of this invention. The figure which shows the example of lighting of the light emission part when the heating key 8b is turned on in embodiment of this invention. The top view of the induction heating cooking appliance by the modification 1 of embodiment of this invention The block diagram of the light emission part of the induction heating cooking appliance by the modification 2 of embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Top plate 2-6 Heating part 7 Display part 8 Operation part 8a Power key 9, 10, 11 Heating coil 12,13 Heated object 14,15 Inverter circuit 16 Control part 16a Heating control part 16b Light emission control part 17 Substrate 18, 18a, 18b LED
19 Light guide cylinders 21-24, 31-34, 41-44, 51-54

Claims (4)

A top plate made of a material that transmits light;
A plurality of heating coils that generate an alternating magnetic field and inductively heat an object to be heated placed on the top plate;
A control unit for controlling a current flowing in the heating coil;
An operation unit for performing an operation of inputting a command related to heating control of an object to be heated;
A plurality of light emitting units provided in the vicinity of the outer periphery of the heating coil,
The control unit includes a heating control unit that supplies a high-frequency current to the heating coil based on an input from the operation unit, and a light emission control unit that controls light emission of the light emitting unit,
Multiple heating coils can be operated in conjunction,
A plurality of heating coils operated in conjunction with the vicinity of the outer periphery of the heating coil that can be operated independently while the operations of the plurality of heating coils are stopped when the power of the main body is turned on by the operation unit An induction heating cooker having a heating area sequential display mode in which the light emitting part is lit so that the vicinity of the outer periphery of the light is sequentially emitted.   When the command for the heating coil is input from the operation unit during the heating area sequential display mode, the control unit is configured to detect the vicinity of the outer periphery of the single heating coil or a plurality of the heating coils that are interlocked with the command. The induction heating cooker according to claim 1, wherein the light emitting unit is turned on so as to emit light, and the mode is changed to a heating mode in which a heating operation based on the command is performed. In the case where light is emitted in the vicinity of the outer periphery of two or more heating coils configured so that the centers are concentric, the control unit is provided in the vicinity of the outer periphery of the outer heating coil among the two or more heating coils. Turn on only the light emitting part
In the case where light is emitted in the vicinity of the outer periphery of two or more adjacent heating coils whose centers are not concentric, the control unit includes a plurality of interlocking light emitting units provided in the vicinity of the outer periphery of each of the two or more heating coils. The induction heating cooker according to claim 1 or 2, wherein a light emitting unit disposed between the heating coils is turned off and a light emitting unit other than the turned off light emitting unit is turned on. The operation unit includes a demo mode setting unit,
If the demo mode is set by the demo mode setting unit before the power of the main body is turned on, even if the command is input from the operation unit after the power is turned on, the control unit The induction heating cooker according to any one of claims 1 to 3, wherein the heating coil is not energized.

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