JP2011204362A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve user-friendliness in circle-less designing.SOLUTION: The induction heating cooker is provided with a top plate 1, a first light-emitting part 3, a second light-emitting part 4, an infrared sensor 5, a heating object detecting means 6 and a power source switch 7. The heating object detecting means 6, when a heating object P is loaded on the top plate 1, detects increase of a light-receiving amount of the infrared sensor 5 of light of the second light-emitting part 4 reflected from the heating object P, and an emission state of the first light-emitting part is changed in accordance with a state of the power source switch 7, so that user-friendliness is improved even in the circle-less designing excellent in designability.

Description

  The present invention relates to an induction heating cooker.

  Conventionally, this type of induction heating cooker has a light emitting unit that emits light when the temperature of the object to be heated is high (see, for example, Patent Document 1).

  FIG. 5 shows a schematic cross-sectional view of the induction heating cooker described in Patent Document 1. As shown in FIG. As shown in FIG. 5, the heating coil 101, the thermistor 104, the light bulb 103, and the reflecting mirror 105 are formed on the lower surface of the top plate 102. Even if the object to be heated P is not heated, the object to be heated P has a high temperature. In some cases, the thermistor 104 provided on the lower surface of the top plate 102 transmits the detected temperature to the control unit 106, and the control unit 106 detects a state in which the top plate 102 is hot and causes the light bulb 103 to emit light. .

  FIG. 6 is a perspective view of the top plate of another conventional induction heating cooker. As shown in FIG. 6, conventionally, a circular placement mark 107 is printed on the top plate, and the user can heat the object to be heated. Although the placement position of P can be recognized, in recent years, there is a circleless design that does not dare print the placement mark 107 on the top plate but differentiates it in terms of design.

Japanese Patent Laid-Open No. 3-289086

  However, in the conventional configuration, the circleless design is excellent in terms of design and can be differentiated from the conventional product. However, the position of the pan, which is a heated object that existed before, is displayed to the user. Since there is no circle to be used, it is difficult for the user to know where the pan is placed, which makes it difficult to use.

  In addition, in the prior art, a pan whose temperature has risen to some extent can be recognized, and a light bulb can be lit to check the position of the pan. However, the pan is unrecognizable because the temperature is low in the pan before heating. It is possible, and it has insufficient performance for the purpose of detecting that the pan is placed and displaying the pan placement position, and the user has a problem that the pan placement position is difficult to understand and is not easy to use. Was.

  In order to solve this problem, a top plate on which an object to be heated is placed, a heating coil that is provided below the top plate and supplies a high-frequency current to the object to be heated, and is arranged around the heating coil, A first light-emitting unit that emits light toward the top plate; an infrared sensor that is disposed on the inner side of the outer periphery of the heating coil; and that is disposed in the vicinity of the infrared sensor; A second light emitting unit that emits directional light, a power switch that turns on / off the power of the device, and a heated object detecting unit, wherein the heated object detecting unit is configured to correspond to the amount of light received by the infrared sensor. The presence or absence of the heated object is determined, and the light emission state of the first light emitting unit is changed according to the state of the power switch.

As a result, when the object to be heated is placed on the infrared sensor, the light emitted from the second light emitting part is reflected and incident on the infrared sensor, thereby increasing the amount of light received by the infrared sensor. The to-be-heated object detection means determines that the pan is placed when the amount of received light is increased, and can change the light emission state of the first light-emitting unit according to the state of the power switch. It is possible to visually check the mounting state and to determine whether the power switch is on or off without checking the power switch.

  The induction heating cooker of the present invention can improve usability even in a circleless design top plate.

Sectional drawing of the induction heating cooking appliance in Embodiment 1 of this invention The perspective schematic diagram of the top plate of the circleless design of the induction heating cooking appliance in Embodiment 1 of this invention The block diagram of the induction heating cooking appliance in Embodiment 1 of this invention The block diagram of the induction heating cooking appliance in Embodiment 1 of this invention Cross-sectional schematic diagram of a conventional induction heating cooker Perspective view of the top plate of a conventional induction heating cooker

  A first invention is a top plate on which an object to be heated is placed; a heating coil that is provided below the top plate and supplies a high-frequency current to the object to be heated; and the top plate disposed around the heating coil A first light emitting unit that emits light toward the surface, an infrared sensor that is disposed inside the outer periphery of the heating coil, measures the temperature of the object to be heated, and is disposed in the vicinity of the infrared sensor, and is directed toward the top plate. A second light emitting unit for emitting light, a power switch for turning on / off the power of the device, and a heated object detecting means, wherein the heated object detecting means is provided on the top plate according to the amount of light received by the infrared sensor. The presence or absence of the object to be heated is determined, and the user places the object to be heated on the top plate by changing the light emission state of the first light emitting unit according to the state of the power switch. The case the light emitted from the second light emitting portion is transmitted through the top plate, it is reflected by the object to be heated, and enters the infrared sensor. The infrared sensor detects that the amount of received light has increased, and causes the first light emitting unit to emit light. As a result, when the user places the object to be heated, a circle is raised by the first light emitting unit, and the issuing means changes depending on whether the power switch is turned on or off. An easy-to-use induction heating cooker can be provided even in a circleless design that can easily grasp the on / off of the power switch and has excellent design.

  In the second invention, in particular, the heated object detection means of the first invention determines the presence or absence of the heated object on the top plate according to the amount of light received by the infrared sensor, and the heated object is placed. If the power switch is turned on, the user does not need to turn on the power switch after placing the object to be heated, making it easier for the user to start cooking. Become.

  In the third invention, in particular, the heated object detecting means of the first or second invention determines the presence or absence of the heated object on the top plate according to the amount of light received by the infrared sensor, and the heated object is placed. When heating is started by the heating means, the second light-emitting part is turned off, and the second light-emitting part that is invisible to the user during cooking is turned off, thereby improving usability. While maintaining, the power consumption of the induction heating cooker can be suppressed.

According to a fourth aspect of the present invention, in particular, the heated object detecting means according to any one of the first to third aspects of the invention determines the presence or absence of the heated object on the top plate according to the amount of light received by the infrared sensor, and the heated object Is turned on when the power switch is in the on state, and the first light emitting unit is blinked when the power switch is in the off state. Even in the less design, it is possible to easily grasp the place where the pan is placed and the power switch is turned on and off, and it is possible to provide an easy-to-use induction heating cooker even in the circleless design which is excellent in design.

  According to a fifth aspect of the present invention, in particular, the first light emitting unit according to any one of the first to fourth aspects includes a plurality of different light emitting elements, and the object to be heated is placed on the object to be heated. When it is determined, by switching the light emitting element that emits light according to the state of the power switch, it is possible to easily grasp where the pan is placed and whether the power switch is on or off even in the circleless design.

  In the sixth invention, in particular, when the heated object detecting means of the fifth invention determines that the heated object is placed, the light emitting element to be lit is switched according to the state of the power switch, and the heating is started. When heating is started by the means, the user can easily see where the object to be heated is placed by causing another light emitting element to emit light, and whether the object to be heated is in a heated state. It is possible to provide a user-friendly induction heating cooker that can be easily recognized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a sectional view of an induction heating cooker according to the first embodiment of the present invention.

  In FIG. 1, an object P to be heated is placed on a top plate 1, a heating coil 2 for supplying a high frequency current to the object to be heated P on the lower surface of the top plate 1, and a top disposed around the heating coil 2. A first light emitting unit 3 that emits light toward the plate 1 is provided, a second light emitting unit 4 that constantly emits toward the top plate 1 inside the outer periphery of the heating coil 2, and the temperature of the object to be heated by the amount of infrared rays. An infrared sensor 5 that measures the above is disposed.

  A control unit (not shown) for supplying a high-frequency current to the heating coil 2 is provided with an object detection means 6, and the object detection means 6 uses the amount of light received by the infrared sensor 5 as an input signal. 1 is a device that outputs a signal to one light emitting unit 3.

  FIG. 2 is a schematic perspective view of a top plate of a circleless design of the induction heating cooker according to the first embodiment of the present invention. The top plate 1 is characterized by a circleless design, and does not have a circular placement mark 107 that indicates a place where the article to be heated P is placed as found in a conventional induction heating cooker.

Further, the top plate 1 transmits the light emitted from the first light emitting unit 3 through the first light emitting region 8 for transmitting the light emitted from the top plate 1 and the light emitted from the second light emitting unit 4. A second light emitting region 9 for transmitting light and a transmission region 10 for transmitting the light emitted from the second light emitting unit 4 and reflected by the object P to be heated to the infrared sensor 5.
About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  FIG. 3 is a block diagram of the induction heating cooker according to the first embodiment of the present invention.

  The second light emitting unit 4 is independent of the circuit to which power is supplied via the power switch 7 and always emits light regardless of whether the power switch 7 is on or off.

  The light emitted from the second light emitting unit 4 is only transmitted through the top plate 1 when the object to be heated P is not placed on the top plate 1, but the object to be heated P is on the top plate 1. When it is placed, the object to be heated P is reflected and enters the infrared sensor 5.

  The to-be-heated object detection means 6 receives the amount of light received by the infrared sensor 5 and outputs a signal to the first light emitting unit 3 when the amount of light received is greater than a certain amount.

  At this time, the signal to be emitted to the first light emitting unit 3 is changed depending on whether the power switch 7 is turned on or off, so that the user places the article P to be heated when the article P is placed. The installation location can be visually confirmed, and if the power switch 7 is not turned on, the user can be prompted to turn on the power switch 7.

  Further, the wavelength region of the light of the second light emitting unit 4 has a region that overlaps the sensitivity region of the infrared sensor 5, and the infrared sensor 5 turns off the lighting of the kitchen depending on the presence or absence of reflection from the heated object P. Even if it exists, it becomes possible to detect the presence or absence of the to-be-heated material P mounting.

  In addition, the second light emitting unit 4 is provided with a plurality of light emitting elements, one of which is replaced with an element that emits infrared light, and when the power switch is off, the infrared light emitting element is caused to emit light. When viewed from the user, nothing appears to shine, so the user does not feel uncomfortable when not in use.

  Moreover, the sensitivity of the infrared sensor 5 becomes large by making the 2nd light emission part 4 the element which light-emits infrared rays, and the detection accuracy of the to-be-heated object detection means 6 can be improved.

  Moreover, the 2nd light emission part 4 can suppress the power consumption of a main body, maintaining convenience, by turning off when cooking is started by the user.

  The heated object detecting means 6 is a signal for turning on the first light emitting unit 3 when the heated object P is placed and the power switch 7 is on, and blinking when the power switch 7 is off. By transmitting this, the user can easily determine the on / off state of the power switch 7 when placing the pan.

  The first light emitting unit 3 is provided with a plurality of light emitting elements, and the heated object detecting means 7 is a signal on which the heated object P is placed and the power switch 7 emits different light emitting elements depending on the on state and the off state. By transmitting this, the user can easily determine the on / off state of the power switch 7 when placing the pan.

  FIG. 4 is a block diagram of the induction heating cooker according to the first embodiment of the present invention. As shown in FIG. 4, when the user starts heating by the heating start means 11, the first light emitting unit 3 emits light from a different light emitting element, so that the user is heating the article P to be heated. It is possible to easily determine whether or not it is easy to use.

  As described above, in the present embodiment, a top plate on which an object to be heated is placed, a heating coil that is provided below the top plate and supplies high-frequency current to the object to be heated, and is arranged around the heating coil. A first light emitting unit that emits light toward the top plate, an infrared sensor that is disposed inside the outer periphery of the heating coil, measures the temperature of the object to be heated, and is disposed in the vicinity of the infrared sensor, and is directed toward the top plate A second light emitting unit that emits light, a power switch for turning on / off the power of the device, and a heated object detecting means, and the heated object detecting means is a heated object on the top plate according to the amount of light received by the infrared sensor. The light emission state of the first light emitting unit is changed according to the state of the power switch.

  As a result, when the object to be heated is placed on the infrared sensor, the light emitted from the second light emitting unit is reflected and incident on the infrared sensor, and the amount of light received by the infrared sensor increases. The object detecting means determines that the pan is placed when the amount of received light is increased, and can change the light emitting state of the first light emitting unit according to the state of the power switch, whereby the user can place the pan on the pan. Can be discriminated, and the on / off state of the power switch can be determined without checking the power switch, and the top plate of the circleless design can be improved in usability.

  As described above, the induction heating cooker according to the present invention can be improved in usability even in a circleless design top plate, and thus is effective for a device that performs cooking.

P Heated object 1 Top plate 2 Heating coil 3 1st light emission part 4 2nd light emission part 5 Infrared sensor 6 Heated object detection means 7 Power switch

Claims (6)

A top plate for placing an object to be heated; a heating coil provided below the top plate for supplying a high-frequency current to the object to be heated; and a first coil that is disposed around the heating coil and emits light toward the top plate. 1 light emitting part, an infrared sensor that is disposed inside the outer periphery of the heating coil and that measures the temperature of the object to be heated, and a second light emission that is disposed in the vicinity of the infrared sensor and emits light toward the top plate Unit, a power switch for turning on / off the power of the device, and a heated object detecting means, wherein the heated object detecting means includes the presence or absence of the heated object on the top plate according to the amount of light received by the infrared sensor. And an induction heating cooker that changes the light emission state of the first light emitting unit according to the state of the power switch. The heated object detecting means determines the presence or absence of the heated object on the top plate according to the amount of light received by the infrared sensor, and if it is determined that the heated object is placed, the power switch is turned on. The induction heating cooker according to claim 1. The heated object detecting means determines the presence or absence of the heated object on the top plate according to the amount of light received by the infrared sensor, determines that the heated object is placed, and heating is started by the heating means. Then, the induction heating cooker according to claim 1 or 2, wherein the second light emitting unit is turned off. The heated object detection means determines the presence or absence of the heated object on the top plate according to the amount of light received by the infrared sensor, determines that the heated object is placed, and the power switch is on. The induction heating cooker according to any one of claims 1 to 3, wherein the first light emitting unit is turned on in the case, and the first light emitting unit is blinked when the power switch is in the off state. The first light-emitting unit has a plurality of different light-emitting elements, and when the heated object detection means determines that the heated object is placed, the light-emitting element to emit light is switched according to the state of the power switch. The induction heating cooking appliance of any one of 1-4. If the object to be heated detection means determines that the object to be heated is placed, another light emitting element is switched according to the state of the power switch and heating is started by the heating start means. The induction heating cooker according to claim 5, wherein the light emitting element emits light.

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