JP5326508B2 - Induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooker capable of preventing misoperations or mischiefs by children, without the need for conducting setting each time by a user. <P>SOLUTION: By having the induction heating cooker capable of preventing wrong operation or mischief by children, without the need for setting each time by user, provided by providing an operation locking means which detects the height of a human body, when the height is less than a fixed height, the operation of an operation means is made invalid. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an induction heating cooker used in general households, which can prohibit a user who is dangerous to cook such as a child from operating by mistake.

  Conventionally, this type of induction heating cooker has a child lock key that allows a user to set whether to enable or disable the operation, and there is an induction heating cooker that has a function to prohibit unintentional operation. (For example, refer to Patent Document 1).

  Hereinafter, a conventional induction heating cooker will be described. Fig.6 (a) is a perspective view which shows the conventional induction heating cooking appliance. In FIG. 6A, 101 is a power supply SW for turning on / off the commercial power supply, 102 is a top plate for placing an object to be heated such as a pan, and a heating coil 103 is provided below the top plate 102. Be placed. An inverter for supplying a high-frequency current to the heating coil 103, a control means for controlling the output of the inverter circuit, an operation unit 104 having various switches and display elements are provided, and the heating output for each burner is competed by the user. Then, a control means controls the output of an inverter circuit so that it may become a preset heating output.

Moreover, FIG.6 (b) is a figure which shows the operation part and display part 104 of the conventional induction heating cooking appliance. 104a is a switch on / off for operating the start / stop of the heating of the corresponding burner, and starts heating when 104a is pressed while the power supply SW101 is ON. Reference numerals 104b and 104c denote an up switch and a down switch, respectively. 104d is a child lock SW. When the child lock SW 104d is pressed, the operation with heating is invalidated. Reference numeral 104e denotes a display unit that displays a thermal power bar 104f when the off / on switch 104a is pressed, and displays the currently set thermal power by operating the up SW 104b and the down SW 104c. Reference numeral 104g denotes a child lock display for displaying a child lock state. A state where this mark is displayed represents a child lock state, and the start of heating is invalidated.
JP 2005-268208 A

  However, the above-described conventional configuration has a problem that the user needs to set the child lock function, and there is a possibility that an erroneous operation by a child may be performed, for example, when the setting is forgotten. In addition, it is assumed that the operation part is accidentally touched when the parent speaks, such as when the child comes to the parent while the user (parent) is cooking in the kitchen. It had the problem that.

  The present invention solves the above-described conventional problems, and includes an operation lock unit that detects the height of a human body and invalidates the operation of the operation unit when the height is below a certain level, so that the user sets each time. It is an object of the present invention to provide an induction heating cooker that can prevent misoperation and mischief of children without having to perform cooking.

In order to solve the above-described conventional problems, a heating cooker according to the present invention includes a main body that constitutes an outer shell, a top plate that is disposed on an upper surface of the main body and on which a cooking container is placed, and is disposed below the top plate. A heating coil for heating the cooking container; a roaster for cooking the food; an inverter circuit for supplying a high-frequency current to the heating coil; an output of the inverter circuit; and a control means for controlling the roaster; and the inverter An operation means for changing the output level of the circuit, a display means for displaying the current output level, and arranged side by side with respect to the floor surface which is a horizontal plane and disposed on the front surface of the main body, from the floor surface Infrared sensor a that reacts by infrared rays from a human body above a predetermined height, and reacts by infrared rays from a human body below a predetermined height from the floor surface A height detecting means for detecting the height of a human body having an external sensor b, and an operation locking means for invalidating the operation of the operating means when the detection result of the infrared sensor a is less than a predetermined value, When the infrared sensor a and the infrared sensor b detect that the human body having a height less than a predetermined height is approaching the main body while the roaster is heated, the control means notifies that the roaster door is dangerous due to high temperature. The height detector is provided with a light shielding plate between the infrared sensor a and the infrared sensor b .

In this way, for example, when the user enters the kitchen while the user is cooking and the user takes his eyes off, the child can invalidate the operation means, so the child lock function is set in advance. It is possible to provide a safe induction heating cooker that is unnecessary. Further, when a human body of a predetermined height or higher approaches, the human body can be detected by both the infrared sensor a and the infrared sensor b, and when a human body of a predetermined height or higher approaches, the operation can be validated. On the other hand, when a human body less than a predetermined height approaches, only the infrared sensor b detects the human body, so that it is possible to recognize that a predetermined height (child) is approaching. It is possible to notify the fact that it is possible to perform notification and invalidate operation in real time, and it is possible to provide a safe induction heating cooker. Moreover, since it can alert | report that it is dangerous before a child approaches and touches a roaster door accidentally, a safer induction heating cooking appliance can be provided. In addition, the detectable area of the infrared sensor a and the detectable area of the infrared sensor b can be divided by height, and when a human body of a predetermined height or more approaches, both the infrared sensor a and the infrared sensor b The operation can be validated when a human body of a predetermined height or higher is approaching. On the other hand, when a human body less than a predetermined height approaches, only the infrared sensor b detects the human body, so that it is possible to recognize that a predetermined height (child) is approaching. It is possible to notify the fact that it is possible to perform notification and invalidate operation in real time, and it is possible to provide a safe induction heating cooker.

The induction heating cooker of the present invention is provided with a height detection means, and by not accepting an operation by a person of a certain height or less, the child has operated the operation means when the user has looked away from the child's eyes. Since the child lock function can be automatically realized without the trouble of setting the child lock function in advance, a safe induction heating cooker can be provided. Moreover, since it can alert | report that it is dangerous before a child approaches and touches a roaster door accidentally, a safer induction heating cooking appliance can be provided. In addition, the detectable area of the infrared sensor a and the detectable area of the infrared sensor b can be divided by height, and when a human body of a predetermined height or more approaches, both the infrared sensor a and the infrared sensor b The operation can be validated when a human body of a predetermined height or higher is approaching. On the other hand, when a human body less than a predetermined height approaches, only the infrared sensor b detects the human body, so that it is possible to recognize that a predetermined height (child) is approaching. It is possible to notify the fact that it is possible to perform notification and invalidate operation in real time, and it is possible to provide a safe induction heating cooker.

1st invention consists of the main body which comprises an outline, the top plate which is arrange | positioned on the upper surface of the said main body, and mounts a cooking container, the heating coil which is arrange | positioned under the top plate and heats the said cooking container, A roaster that cooks cooking, an inverter circuit that supplies a high frequency current to the heating coil, an output of the inverter circuit, a control means for controlling the roaster, and an operating means for changing the output level of the inverter circuit; A display means for displaying the current output level, and an infrared sensor which is arranged vertically to the floor surface which is a horizontal plane and which is arranged on the front surface of the main body and reacts with infrared rays from a human body having a predetermined height or more from the floor surface a and a height for detecting the height of the human body having an infrared sensor b that reacts with infrared rays from the human body below a predetermined height from the floor surface And an operation lock unit that invalidates the operation of the operation unit when the detection result of the height detection unit is less than a predetermined value, and the control unit is configured to transmit the infrared rays while heating the roaster. When the sensor a and the infrared sensor b detect that a human body having a height less than a predetermined height has approached the main body, the notification means notifies that the roaster door is dangerous due to high temperature , and the height detection means By installing a light-shielding plate between the infrared sensor a and the infrared sensor b, it is possible to prevent an operation by a person having a certain height or less from being accepted by the user so that the user can keep an eye on the child. It is possible to provide a safe induction heating cooker that can be disabled even if a child operates the operation means, and does not have the hassle of setting the child lock function in advance. Can. In addition, the detectable area of the infrared sensor a and the detectable area of the infrared sensor b can be divided by height, and when a human body of a predetermined height or more approaches, both the infrared sensor a and the infrared sensor b The operation can be validated when a human body of a predetermined height or higher is approaching. On the other hand, when a human body less than a predetermined height approaches, only the infrared sensor b detects the human body, so that it is possible to recognize that a predetermined height (child) is approaching. It is possible to notify the fact that it is possible to perform notification and invalidate operation in real time, and it is possible to provide a safe induction heating cooker. Moreover, since it can alert | report that it is dangerous before a child approaches and touches a roaster door accidentally, a safer induction heating cooking appliance can be provided.

The second invention is provided with the height detecting means left and right of the main body of the invention described in paragraph 1, wherein the height detecting means includes sensing a human body approaching from a distance left or right from the front panel With the kitchen where the induction heating cooker is installed, the human body can be detected accurately and the height can be detected regardless of whether it is on the left or right when the induction heating cooker is viewed from the entrance. A safe induction heating cooker can be installed regardless of the configuration.

According to a third aspect of the invention, the induction heating cooker according to the first aspect of the invention includes the voice notification unit, and the control unit approaches a human body whose height is less than a predetermined value by the infrared sensor a and the infrared sensor b. When it is detected that the operation means has been operated, the notification means notifies the child that the operation cannot be performed by notifying the child that the height is less than a predetermined value and cannot be operated. The user (parent) can be informed that the child is operating.

  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 block diagram of an induction heating cooker according to Embodiment 1 of the present invention.

  It has a main body 1 constituting the outer shell and a top plate 3 placed on the upper surface of the main body 1 and on which the cooking container 2 is placed, and is provided with a rectifier circuit that converts AC power supplied from a commercial power source into DC. A heating coil 4 for heating the cooking vessel 2 is provided below the top plate 3, and when the cooking vessel 2 is heated, the inverter circuit 5 applies a high-frequency current from the power source converted into direct current by the rectifier circuit to the heating coil 4. Supply. When a high-frequency current is supplied to the heating coil 4, an alternating magnetic field is generated, and an eddy current is generated on the bottom surface of the metal cooking vessel 2 disposed above the heating coil 4, and cooking is performed using Joule heat generated by the eddy current. The container 2 can be heated.

  The control means 6 controls the output of the inverter circuit 5 according to the heating power set by the user through the operation / display means 7. The control means 6 of this embodiment is constituted by a microcomputer.

  The control means 6 controls the output of the inverter circuit in accordance with the temperature detected by the temperature detection means 8 constituted by a thermistor arranged in the approximate center of the heating coil 4.

  In the present embodiment, the temperature detecting means 8 is constituted by a thermistor, but a temperature detecting element such as a platinum sensor or an infrared sensor may be used.

  The control means 6 includes a storage means 9 constituted by a ROM or RAM on a microcomputer or an EEPROM on a circuit. The storage means 9 stores control parameters of the inverter circuit 5 corresponding to each thermal power setting.

  The control means 6 has a function of turning off the heating by using the time measured by the time measuring means 10 and determining that it has been forgotten to turn off when there is no key operation of the operation means for a certain time after the start of heating.

  The notification means 11 stops the heating when the timer ends when the key is pressed by the operation / display means 7 or when the timer function is used for cooking, and notifies that the timer has ended. .

  The height detection means 12 can detect whether or not the human body is approaching by the output of the infrared sensor 13 that detects the infrared rays emitted from the human body attached to the front surface of the main body and outputs the infrared rays.

  In the present embodiment, a passive infrared sensor is used as the infrared sensor 13 and a sensor that outputs the presence or absence of a human body is used according to a change in the infrared ray emitted from the human body. It may be configured by an active sensor by a combination of light receiving elements that receive light.

  Next, the operation / display unit 7 will be described with reference to FIG. FIG. 2A is a diagram of the operation / display unit 7 in a state where all the elements that can be displayed by the display element are turned on. The display means 7g is composed of an LCD display element, and displays the thermal power with a pictograph according to the set thermal power, and also displays the remaining time when the timer is set.

  FIG. 2B is a diagram of the operation / display means 7 before the start of heating, and does not display a pictograph indicating the set thermal power. 2 (c) is a diagram of the operation / display means 7 during heating at the maximum heating power, and FIG. 2 (d) is a diagram of the operation / display means 7 during heating at the heating power 5, up to the set heating power 5. Display pictographs.

  When the off / on SW 7 a is pressed, the control means 6 controls the output of the inverter circuit 5 and starts heating at the set heating power 5. Further, when the on / off switch 7a is pressed during heating, the control means 6 turns off the output of the inverter circuit and stops heating.

  When the up SW 7b is pressed during heating, the operation / display means 7 changes the current heating power to a display that is one rank higher. For example, if heating is performed with the thermal power 5, pictograms are displayed up to the thermal power 6. When the heating power setting is increased by one rank, the control means 6 increases the output of the inverter circuit by one rank.

  Further, when the down SW 7c is pressed during heating, the operation / display means 7 changes the display so that the current heating power is lowered by one rank. For example, if heating is performed with the thermal power 5, pictograms are displayed up to the thermal power 4. When the heating power setting is lowered by one rank, the control means 6 lowers the output of the inverter circuit by one rank.

  Regardless of whether the heating is stopped or not, when the timer up SW 7d is pressed while the timer is not set, the operation / display means 7 displays the time and shifts to the timer setting mode. When the timer up SW 7d is further pressed, the displayed timer time is incremented. Further, when the timer down SW 7e is pressed in the timer setting mode, the displayed time is decremented. The timer setting mode can be canceled by pressing the cancel SW 7f.

  In the timer setting mode and during heating, timer countdown starts after timer up SW7d and timer down SW7e are released, and heating is stopped when the remaining time becomes zero. When the timer setting mode is entered while the heating is stopped, the timer countdown is started after the heating is started, and when the remaining time becomes 0, the heating is stopped as described above.

  Next, the infrared sensor in this Embodiment is demonstrated using FIG. An area surrounded by a dotted line in FIG. 3A is a detectable area 15 where the infrared sensor 13 can detect a human body. In this embodiment, a passive infrared sensor using a pyroelectric element is used as the infrared sensor 13. When the human body enters the detectable area 15 with respect to the infrared light obtained from the background in the detectable area 15, the infrared light emitted from the human body causes a difference from the background so that the human body can be detected.

  If the human body is completely stopped in the detectable area 15, the human body cannot be detected because the infrared difference cannot be obtained. However, in general, when the user is cooking, the user Is not a problem because it works.

  FIG. 3B shows the infrared sensor 13 according to the present embodiment, in which a light shielding plate 16 made of a member having a low infrared transmittance is attached downward in the vertical direction. As a result, the lower area of the detectable area 15 is blocked. FIG. 3C shows a state of being attached to the main body 1, and a height h (100 cm in the present embodiment) from the lower surface (floor surface) of the cooking table 17 on which the main body 1 is installed to the detectable area 15 is detected. It becomes a threshold value as to whether or not the human body can be detected by the means 12. Even when a human body whose height is lower than the height h approaches, the height detection means 12 cannot detect the human body. In addition, when a human body whose height is higher than the height h approaches, the height detection means 12 detects the human body and detects that the user has approached.

  The operation lock means 14 invalidates the key operation performed by the operation / display means 7 when there is no detection result of the height detection means 12 (when a human body whose height is higher than the height h is not approaching). To do.

  When the human body is detected by the height detection means 12, the operation lock means 14 validates the operation when a key operation is performed by the operation / display means 7, and the control means 6 performs predetermined control.

  In this embodiment, the height h is set to 100 cm. However, the height h is not limited to this, and the height h can be adjusted according to the mounting direction of the light shielding plate.

  In the present embodiment, the operation lock unit 14 invalidates the key operation by the operation / display unit 7 when there is no detection result of the height detection unit 12, but when heating is being performed, By turning off the heating when the heating off / on SW 7a is pressed, it is possible to prevent the heating from being turned off when it is erroneously detected and becoming unsafe.

  As a result, it is possible to prevent operation by a person of a certain height or less, and even if the child operates the operation means in the interval when the user takes his / her eyes off, It is possible to provide a safe induction heating cooker that does not have the trouble of setting the child lock function.

(Embodiment 2)
Next, a second embodiment will be described. Note that description of the same components and operations as those of the first embodiment is omitted.

  With reference to FIG. 4A, the height detection means 12 using a plurality of infrared sensors 13 will be described. Between the infrared sensor a13a and the infrared sensor b13b, a light shielding plate 16 made of a member having low infrared transmittance is installed. Thereby, the detectable area 15a of the infrared sensor a13a and the detectable area 15b of the infrared sensor b13b can be divided by the height h (100 cm in the present embodiment).

  FIG. 4B is a table showing the operation lock state by the operation lock means 14 according to the detection result of each infrared sensor. When neither the infrared sensor a13a nor the infrared sensor b13b detects a human body, the height detection unit 12 determines that there is no human body, and the operation lock unit 14 invalidates the operation by the operation / display unit 7.

  When the infrared sensor a13a does not detect a human body and the infrared sensor b13b detects a human body, the height detection means 12 detects a human body having a height of h or less and determines that it is a child, and the operation lock means 14 operates / displays. The operation by the unit 7 is invalidated.

  Further, when it is determined that the user is a child and the operation / display unit 7 is invalidated by the operation lock unit, the notification unit 11 for notifying the voice indicates that the operation cannot be performed because of a child. Notification.

  In the present embodiment, the notification voice is “cannot be operated for children”, but is not limited to this as long as it makes sense.

  When the infrared sensor a13a detects a human body and the infrared sensor b13b does not detect a human body, the height detection means 12 detects a human body having a height of h or more and determines that the person is an adult. The operation by the display unit 7 is validated.

  In the present embodiment, the infrared sensor a13a detects a human body, and the infrared sensor b13b does not detect a human body. However, it is determined that the human body is an adult. Although it is conceivable when there is no movement, the operation / display unit 7 may be validated when the human body is detected by the infrared sensor b13b after confirming a plurality of times.

  When both the infrared sensor a13a and the infrared sensor b13b detect a human body, the height detection means 12 detects a human body having a height of h or more and determines that it is an adult, and the operation lock means 14 performs an operation by the operation / display unit 7. Valid.

  When the height detection means 12 detects a child having a height of h or less while the top plate is at a high temperature (60 ° C. in this embodiment) by the temperature detection means 8, the “top plate Please do not approach because of the high temperature. "

  In the present embodiment, the notification voice is “Please do not approach because the top plate is hot”, but it is not limited to this if it makes sense.

(Embodiment 3)
Next, the operation in the third embodiment will be described. In addition, description is abbreviate | omitted about the same structure and operation | movement as Embodiment 1-2.

Fig.5 (a) is a figure of the induction heating cooking appliance in this Embodiment. A roaster 18 for cooking fish and the like is provided. The interior of the roaster reaches about 300 ° C during cooking, and the roaster door is made of heat-resistant glass.

  Therefore, there is a risk of burns if the child approaches and touches the hand. 13A and 13B are a combination of the infrared sensor a and the infrared sensor b described in the second embodiment, and the infrared sensor A13A and the infrared sensor B13B respectively represent a child, an adult, and a human body as shown in the table of FIG. 4B. Can be detected.

  FIG.5 (b) is a figure which shows the breadth of the detection range of the horizontal direction of infrared sensor A13A and infrared sensor B13B of the induction heating cooking appliance in this Embodiment. The detectable range 15A is the detection range of the infrared sensor A, and the detectable range 15B is the detection range of the infrared sensor B.

  In general, a kitchen in which an induction heating cooker is installed has a wall on the right side of the induction heating cooker or a wall on the left in many cases. If infrared sensors 13 are arranged on the left and right sides of the induction heating cooker, all kitchens are installed. It becomes possible to cope with.

  The height detection means 12 recognizes whether each child is detected or adult is detected from the output results of the infrared sensor A13A and the infrared sensor B13B, and takes OR of A and B, one of which is a child In the same manner as in the second embodiment, the operation lock unit 14 invalidates the operation by the operation / display unit 7.

  Further, when it is determined that the user is a child and the operation / display unit 7 is invalidated by the operation lock unit 14, the notification unit 11 for notifying the voice indicates that the operation cannot be performed because of a child. Notification is performed.

  Also, if the height detection means 12 detects a child whose height is less than h while cooking in a roaster and the inside of the cooking cabinet is hot, annunciating "Please do not approach because the roaster is hot" The voice notification is performed by the means 11.

  In the present embodiment, the notification voice is “Please do not approach because the roaster is hot”, but it is not limited to this if it makes sense.

  As described above, by detecting the child or adult by the height detection means, if the child is detected, the operation is invalidated, and if there is a part having a dangerous temperature, that fact is notified. An induction heating cooker that can perform cooking safely can be provided.

  As described above, the induction heating cooker according to the present invention determines whether a child or an adult is detected by the height detection means, and when a child is detected, the operation is invalidated or notified, thereby providing a safe cooker. Since it can provide, it can apply also to uses, such as another heating cooker.

The block diagram which shows the induction heating cooking appliance in Embodiment 1 of this invention The figure which shows the operation part and display part of the induction heating cooking appliance in Embodiment 1 of this invention The figure which shows the infrared sensor and attachment position in Embodiment 1 of this invention The figure which shows operation | movement of the infrared sensor in the Embodiment 2 of this invention, a height detection means detection, and an operation lock means The figure which shows the induction heating cooking appliance and infrared sensor attachment position in Embodiment 3 of this invention. The perspective view which shows the conventional induction heating cooking appliance, and the figure which shows the operation part and display part of an induction heating cooking appliance

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Cooking container 3 Top plate 4 Heating coil 5 Inverter circuit 6 Control means 7 Operation / display means 8 Temperature detection means 11 Notification means 12 Height detection means 13 Infrared sensor 14 Operation lock means 18 Roaster

Claims (3)

A main body constituting the outer shell, a top plate disposed on the upper surface of the main body and on which the cooking container is placed, a heating coil disposed below the top plate and heating the cooking container, and a roaster for cooking and cooking food An inverter circuit for supplying a high-frequency current to the heating coil; an output of the inverter circuit; a control means for controlling the roaster; an operating means for changing an output level of the inverter circuit; and the current output level Display means for displaying, an infrared sensor a that is arranged vertically to a floor surface that is a horizontal plane and that is disposed on the front surface of the main body and reacts with infrared rays from a human body having a predetermined height or more from the floor surface, and the floor surface A height detection means for detecting the height of a human body having an infrared sensor b that reacts with infrared rays from a human body less than a predetermined height from An operation locking means for invalidating the operation of the operation means when the detection result of the infrared sensor a is less than a predetermined value, and the control means is configured to heat the roaster while heating the roaster. When the infrared sensor b detects that a human body having a height less than a predetermined height is approaching the main body, the notification means informs that the roaster door is dangerous due to high temperature , and the height detection means includes the infrared sensor An induction heating cooker in which a light shielding plate is installed between a and the infrared sensor b. 2. The induction heating cooker according to claim 1, further comprising the height detection unit provided on the left and right of the front surface of the main body, wherein the height detection unit detects a human body approaching from the left or right away from the front surface of the main body. When the control means detects that the operation means has been operated after detecting that the human body whose height is less than a predetermined value is approaching by the infrared sensor a and the infrared sensor b, The induction heating cooker according to claim 1, wherein the notifying means notifies by voice that the operation cannot be performed because the height is less than a predetermined value.

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