JP5169970B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker that emits and displays the position and operating state of a heating coil.

  Unlike a gas cooker or an electric heater, an induction heating cooker does not show flames or red heat when heated. In order to solve these problems, in recent years, products that can visually indicate the state of the heating portion by light emitting display using a light emitting diode or the like have become widespread. As an example, when the power is turned on, a display means is displayed in the vicinity of the heating unit for placing the cooked cooking container provided on the top plate, and the cooked cooking container is further placed. When heating is started, the display content is different from the previous display content (see, for example, Patent Document 1).

  For example, the conventional induction heating cooker has a configuration as shown in FIG. This configuration includes a case 1 forming a main body, a translucent top plate 2 provided on the upper surface of the case 1, a heating coil 3 for heating a cooked cooking container provided under the top plate 2, a heating coil 3, A control unit 4 for controlling the contents of display and a light emitting means 5 for displaying a use state on the top plate 2 are provided. The light emitting means 5 has a structure in which a light source made of a light bulb or a semiconductor light emitting element is provided at the center of the doughnut-shaped light guide. When the power switch is turned on, the light source at the center is turned on, and this light is guided. It is guided by a light body and emits light at the peripheral part. The light emitted from the peripheral portion displays a circle on the top board. With such a configuration, when the power is turned on, the light emitting means 5 is caused to emit light, and a graphic indicating that the power is turned on is displayed on the top 2. Further, when the cooked container is placed and heating is started, the display state is changed, such as changing the lighting color, and the heating state is displayed.

  With the above-described configuration, the conventional induction heating cooker has improved the usability by visually indicating the state of the heating unit.

Japanese Patent No. 3405317

  However, in the conventional configuration, in order to display the state of the heating unit in an easy-to-understand manner for the user, it is necessary to provide a display unit as close to the heating unit as possible, and the heating coil 3 and the light emitting means 5 must be close to each other. The light emitting means 5 has a problem that it is easily affected by heat from the heated cooking container on the heating coil 3 and the top plate 2. In the conventional configuration, the heating coil 3 and the light emitting means 5 are generally provided in a place isolated from the air passage 6 for cooling the heat generating components of the control unit 4, so that the light emitting means 5 is sufficient. As a result, it was difficult to obtain a sufficient cooling effect, and as a result, it was difficult to obtain sufficient light emission characteristics and durability.

  An object of the present invention is to solve the above-mentioned conventional problems, and to provide an induction heating cooker having high cooling efficiency of the light emitting means, good light emitting characteristics and durability.

In order to solve the above-described conventional problems, an induction heating cooker according to the present invention is provided on the top surface of the main body and is provided with a top plate on which a cooking container is placed and heating for heating the cooking vessel provided at a lower portion of the top plate. A coil, a control unit for controlling the output of the heating coil, a blower device for sending wind for cooling the heat generating components of the control unit, and a space between the heating coil and the control unit under the heating coil and a magnetic shield plate forming a cool air passage from the blower as well as to suppress the leakage of the magnetic flux from the heating coil provided so as, in the outer periphery of the heating coil position and operation state of said heating coil the light emitting means for emitting display is provided, the magnetic shield plate of said light emitting means an opening in a portion facing provided on Rutotomoni, said light emitting means includes a light source that emits light, light in the top plate side covering the light source Box with a transparent part With it and to obtain a structure provided with vent holes for the passage of cooling air to the site facing the opening in the light emitting means.

By providing the opening in the magnetic shield plate that forms the cooling air passage in this way, the main cooling air for cooling the heat generating components of the control unit hits the light emitting unit through the opening, so that the cooling efficiency of the light emitting unit As a result, good light emission characteristics and high durability can be secured. Further, the inside of the box can be effectively cooled by the wind introduced from the ventilation holes into the box while the light from the light source is guided in the direction of the top plate by the box to ensure good light emission characteristics. Is.

  The light emitting means includes a light source that emits light, and a box that covers the light source and that has a light transmitting portion on the top plate side, and a part of the box is made from the opening through the magnetic shield plate. It was made the structure which provided the ventilation hole for making cooling air flow in the protrusion part of the said box, making it protrude below.

  As a result, the light from the light source is guided in the direction of the top plate by the box to ensure good light emission characteristics, and the cooling efficiency is further improved by introducing the wind from the protruding part of the box. is there.

The induction heating cooker of the present invention can provide an induction heating cooker having high cooling efficiency of the light emitting means and good light emission characteristics and durability. Further, the inside of the box can be effectively cooled by the wind introduced from the ventilation holes into the box while the light from the light source is guided in the direction of the top plate by the box to ensure good light emission characteristics. Is.

Plane external view as seen from above the induction heating cooker in Reference Embodiments 1 to 3 and Embodiments 1 and 2 of the present invention Sectional drawing which shows the structure of the induction heating cooking appliance in the reference form 1 of this invention The perspective view of the light emission means of the induction heating cooking appliance in the reference form 1 of this invention The light emission means of the induction heating cooking appliance in reference form 1 of this invention, and sectional drawing of the vicinity Light emitting means and sectional view of the vicinity of the induction heating cooker in Reference Embodiment 2 of the present invention Light emitting means of induction heating cooker in reference embodiment 3 of the present invention and sectional view of the vicinity Light emitting means and sectional view of the vicinity of induction heating cooker in Embodiment 1 of the present invention Light emitting means and cross-sectional view of the vicinity of the induction heating cooker in Embodiment 2 of the present invention Sectional drawing which shows the structure of the conventional induction heating cooking appliance

1st invention is provided in the main body upper surface, the top plate which mounts a cooking vessel, the heating coil which is provided in the lower part of the said top plate and heats the said cooking vessel, and the control part which controls the output of the said heating coil And a blower device for sending wind for cooling the heat generating components of the control unit, and a magnetic flux leakage from the heating coil provided to partition the space of the heating coil and the control unit below the heating coil. And a magnetic shielding plate that forms a cooling air passage from the blower, and a light emitting means for emitting and displaying the position and operating state of the heating coil is provided near the outer periphery of the heating coil, and the magnetic shielding plate The light emitting means includes a light source that emits light, and a box that covers the light source and that has a light transmissive portion on the top plate side. The opening in the light emitting means By providing the vent holes for the passage of cooling air at a site facing, for leading cooling air for cooling the heat-generating components of the control unit hits the light emitting means through the opening, the cooling efficiency of the light emitting means It is possible to improve and ensure good light emission characteristics and high durability. Further, the inside of the box can be effectively cooled by the wind introduced from the ventilation holes into the box while the light from the light source is guided in the direction of the top plate by the box to ensure good light emission characteristics. Is.

2nd invention is provided in the upper surface of a main body, the top plate which mounts a cooking vessel, the heating coil which is provided in the lower part of the said top plate and heats the said cooking vessel, and the control part which controls the output of the said heating coil And a blower device for sending wind for cooling the heat generating components of the control unit, and a magnetic flux leakage from the heating coil provided to partition the space of the heating coil and the control unit below the heating coil. And a magnetic shielding plate that forms a cooling air passage from the blower, and a light emitting means for emitting and displaying the position and operating state of the heating coil is provided near the outer periphery of the heating coil, and the magnetic shielding plate The light emitting means includes a light source that emits light, and a box that covers the light source and that has a light transmissive portion on the top plate side. Open the part of the box Protrudes below the magnetic shield plate from parts, by providing the vent holes for the passage of cooling air to the projecting portion of the box body, the main cooling air aperture for cooling heat-generating components of the control unit Therefore, the cooling efficiency of the light emitting means is improved, and good light emission characteristics and high durability can be ensured. Further, the cooling efficiency is further improved by introducing the air from the protruding portion of the box body while guiding the light of the light source in the direction of the top plate by the box body and ensuring good light emission characteristics. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference embodiments and embodiments of the present invention will be described below with reference to the drawings. It should be noted that the present invention is not limited by this reference embodiment or embodiment.

( Reference form 1)
FIG. 1 is a plan external view of an induction heating cooker as viewed from above according to a first reference embodiment of the present invention. The top plate 21 constituting the upper surface of the main body has a touch such as a circular heating zone 22 indicating the placement position of the cooking container, a power switch 23, a heating switch 24 for turning heating ON / OFF, and a heating power switch 25 for setting heating output. Type switches are printed. Further, the top plate 21 has a light-transmitting property, the arc-shaped light-emitting display portion 26 along the I Ri pressurized heat zone 22 to emit light and transmitted light by the light emitting means from the top plate 21 downward to the surface It is displayed.

FIG. 2 is a cross-sectional view showing the configuration of the induction heating cooker according to the first reference embodiment of the present invention. A top plate 21 on which the cooking container 28 is placed is provided on the upper surface of the main body 27 forming the outer shell, and a heating coil 29 for induction heating the cooking container 28 is provided below the top plate 21. Ferrites 32 having magnetism are provided radially below the heating coil 29 to suppress downward magnetic flux. In addition, a temperature sensor 30 made of a thermistor or the like is provided in the lower part of the top plate 21 corresponding to the lower part of the cooking container 28, and heat transmitted from the bottom surface of the cooking container 28 through the top plate 21 is detected according to the temperature. Output the signal. The control unit 31 for controlling the output of the heating coil 29 downward based on the signal output from the temperature sensor 30 of the heating coil 29 is provided. Control but control unit 31 may affect the magnetic flux by the magnetic shielding effect of our riffs ferrite 32 is disposed below the ferrite 32 is reduced, in order to further eliminate the influence of magnetic flux leakage, an aluminum or the like having a magnetic shielding effect The resulting magnetic shield plate 33 is provided so as to partition the space on the heating coil 29 side and the space on the control unit 31 side. Heating coil 29 is attached with an adhesive or the like to the coil base 34 upper surface for accommodating the ferrite 32, also to the cooking vessel 28 or al pressurized heat coil 29 which is heated between the heating coil 29 and the top plate 21 A heat insulating material 35 made of ceramic fiber or the like for reducing the thermal effect is provided . With anti conditioning plates 33 supports the heating coil 29 via the coil base 34 from below, by being biased upward by a spring 36 provided in the main body 27 bottom, the pressurized heat coil 29 top plate 21 It is provided so as to be pressed through the heat insulating material 35 toward the lower surface. Also, like space forms a cooling air passage 37, such as an IGBT and a resonant capacitor which is joined to the arrangement has been that the heat sink in the cold却風Ro 37 between the anti-conditioning plates 33 and the body 27 bottom control the heat generating component 38 of control unit 31 is cooled to a desired temperature by the cooling air blower 39 provided in the body 27. Below the top plate 21 having translucency, there is provided a light source 41 composed of a light source 41 such as a light emitting element such as an LED and configured to emit light toward the top plate 21. An opening 42 is provided in the portion facing the light emission unit 40 of the anti-conditioning plates 33.

Figure 3 is a perspective view of the light emitting means of the induction heating cooker in the first reference embodiment of the present invention. In this reference embodiment, the light emitting unit 40 has a light-emitting substrate 43 mounted with the light source 41 composed of light-emitting elements or the like such as an LED, a light transmitting portion at the top is configured to surround the light emission substrate 43 (the top plate side) It has a configuration including a box 45, a bright sheet 46 that receives light from the light source 41, and a display sheet 48 in which an opaque part 47 is formed by printing.

FIG. 4 is a cross-sectional view of the light emitting means and the vicinity thereof in the induction heating cooker according to the first reference embodiment of the present invention, and is a cross section in the longitudinal direction of the light emitting means. Light emitting means 40 in the present reference embodiment is provided in the upper portion of the magnetic shielding plate 33, an opening 42 is provided at a site explosion conditioning plates 33 smell Te facing the light emission unit 40. In addition, a cooling air passage 37 for cooling the control unit is formed in the lower part of the magnetic shield plate 33, and there is a wind flow as shown by an arrow in the figure.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, when the cooking container 28 is placed in the heating zone 22 and the power switch 23 is pressed, the heating standby state is set. At this time, if the light emitting means 40 is caused to emit light according to a signal from the control unit 31 and the entire light emitting display unit 26 is turned on, the placement position of the cooking container 28 is easily understood. Next, when the heating switch 24 is pressed and heating of the cooking container 28 is started, the emission color of the light emitting means 40 is changed from the heating standby state, and the heating state is communicated to the user in an easily understandable manner. Further, a desired heating output is set by the thermal power switch 25. At this time, if the emission color of the light emitting means 40 is changed according to the heating output, the strength of the thermal power can be visually recognized. The emission color of the light emitting means 40 in these series of operations may be changed to, for example, white during heating standby, and yellow, orange, and red each time the heating power increases during heating. These color changes can be carried out by providing a plurality of light sources 41 of different colors that constitute the light emitting means 40 and changing the combination of light emission methods. Incidentally, descriptive of it but for light emission display unit 26 as much as possible use is better positioned near the periphery of the heating zone 22's, in order that it is necessary to bring the light emitting means 40 to the heating coil 29, the light emitting unit 40 heating coil 29 Heat generation and temperature influence from the cooking container 28 are likely to occur. Therefore, the induction heating cooker shown in this reference embodiment has a configuration having a magnetic shield plate 33 that forms a cooling air passage 37 from the blower 39 as well as to suppress the leakage of the magnetic flux from heating coil 29, magnetic shield plate 33 An opening 42 is provided at a portion facing the light emitting means 40. With such a configuration, the main cooling air for cooling the heat generating component 38 of the control unit 31 directly hits the light emitting means 40 through the opening 42 as shown by the arrow in FIG. The cooling efficiency of 40 can be improved, and good light emission characteristics and high durability can be secured. Further, since the magnetic shield plate 33 is used as a support member for the heating coil 29 and the control unit 31 is disposed below it, the configuration is simplified and space saving is achieved, and the entire product is made thinner and smaller. Is possible.

( Reference form 2)
Figure 5 is a cross-sectional view of a light emitting means and the vicinity of the induction heating cooker in the second reference embodiment of the present invention, a longitudinal cross section in the light emitting means. Since the basic configuration is the same as that of the reference embodiment 1, the description thereof is omitted, and different points will be mainly described. The same components as those in FIG. 4 of the reference form 1 are denoted by the same reference numerals.

In FIG. 5, an electric connection portion 49 for supplying electric power necessary for light emission from the control portion through the lead wire 50 is provided below the magnetic shield plate 33 from the opening portion 42 on the light emitting substrate 43 of the light source 41 constituting the light emitting means 40. It is provided to protrude. With this configuration, the main cooling air flowing through the cooling air passage 37 formed by the magnetic shield plate 33 directly hits the electrical connection portion 49 and the lead wire 50 as shown by the arrows. Efficient cooling to the center. Moreover, since the electrical connection part 49 is located in the same space as the control part, the assemblability can be improved. Thus, the present second reference is by which projects below a part or the whole open mouth 42 or al-proof conditioning plates 33 of the light emitting unit 40, the cooling air passage 37 formed in the magnetic shielding plate 33 The main cooling air flowing effectively hits the protruding portion of the light emitting means 40, and the cooling efficiency is further improved.

( Reference form 3)
Figure 6 is a cross-sectional view of the light emitting means and the vicinity of the induction heating cooker in the third reference embodiment of the present invention, a longitudinal cross section in the light emitting means. Since the basic configuration is the same as that of the reference embodiment 1, the description thereof is omitted, and different points will be mainly described. The same components as those in FIG. 4 of the reference form 1 are denoted by the same reference numerals.

6, issue unit 40 includes a light source 41 for emitting light, a light-emitting substrate 43 for mounting the light source 41, a lead wire 50 for supplying power to the light emission substrate 43, the top plate a direction of light of the light source 41 and a light shielding plate 52 for preventing the light leakage from the light guide 51 and the light guide 51 and light source 41 configured light-transmitting material in a transparent resin or glass such as polycarbonate for guiding the The light guide unit 53 is included. Further, the light source 41 is attached so as to protrude below the magnetic shield plate 33 from the opening 42, and the light source 43 can be efficiently cooled by the main cooling air flowing through the cooling air passage 37 formed by the magnetic shield plate 33. An inexpensive light source 4 that does not have a very high heat-resistant temperature
Even if 3 is used, the light emission performance and durability can be sufficiently secured. Furthermore, since the protruded below the magnetic shielding plate 33 a portion of the light guide 51 from the opening 42 in the present reference embodiment, guide the main cooling air flowing through the cooling air passage 37 formed in the magnetic shielding plate 33 The entire light guide 51 can be efficiently cooled from the protruding portion of the light body 51 by heat conduction, and good light emission characteristics and sufficient durability can be ensured.

(Embodiment 1 )
FIG. 7 is a cross-sectional view of the light emitting means and the vicinity of the induction heating cooker according to the first embodiment of the present invention, and is a cross section in the longitudinal direction of the light emitting means. Since the basic configuration is the same as that of the reference embodiment 1, the description thereof is omitted, and different points will be mainly described. The same components as those in FIG. 4 of the reference form 1 are denoted by the same reference numerals.

  In FIG. 7, a ventilation hole 54 for passing cooling air is provided at a portion facing the opening 42 at the boundary between the light emitting substrate 43 and the box 45 of the light source 41 constituting the light emitting means 40. With this configuration, the main cooling air flowing through the cooling air passage 37 formed by the magnetic shield plate 33 flows through the lower surface of the light emitting substrate 43 as indicated by the arrow, and at the same time, is introduced into the box body 45 from the ventilation holes 54 and passes therethrough. Then, it is discharged from the vent hole 54 again. Therefore, in the present embodiment, the light from the light source 41 is guided in the direction of the top plate by the box body 45 to ensure good light emission characteristics, and the inside of the box body 45 by the wind introduced into the box body 45 from the ventilation holes 54. Can be effectively cooled.

(Embodiment 2 )
FIG. 8 is a cross-sectional view of the light emitting means and the vicinity thereof in the induction heating cooker according to the second embodiment of the present invention, and is a longitudinal section of the light emitting means. Since the basic configuration is the same as that of the reference embodiment 1, the description thereof is omitted, and different points will be mainly described. The same components as those in FIG. 4 of the reference form 1 are denoted by the same reference numerals.

  In this embodiment, the light source 41, the light emitting substrate 43, and a part of the box body 45 constituting the light emitting means 40 are protruded below the magnetic shield plate 33 from the opening 42 in the present embodiment. A ventilation hole 54 for passing cooling air through the portion 55 is provided. With this configuration, the main cooling air flowing through the cooling air passage 37 formed by the magnetic shield plate 33 flows through the lower surface of the light emitting substrate 43 as shown by the arrows, and at the same time, the ventilation holes provided in the projecting portion 55 of the box body 45. 54 is introduced into the box body 45 through the air and then discharged from the vent hole 54 again. Therefore, in the present embodiment, the light from the light source 41 is guided in the direction of the top plate by the box 45 to ensure good light emission characteristics, and the wind is efficiently passed through the ventilation holes 54 from the protrusions 55 of the box 45. By introducing, the cooling efficiency inside the box 45 is further increased.

In Embodiments 1 to 3 and Embodiments 1 and 2 , when light leaks from the light emitting means 40 to the lower portion of the magnetic shield plate 33, the magnetic shield plate 33 blocks light leakage toward the top plate 21. be able to. Therefore, the magnetic shield plate 33 also works effectively as a light shielding plate.

In addition, in Embodiments 1 to 3 and Embodiments 1 and 2 , the shape of the light-emitting display unit 26 and how to shine the light-emitting display portion 26 are not limited to those of the reference embodiment and the embodiment, but depending on the purpose. It is clear that various forms are possible.

  As described above, the induction heating cooker according to the present invention can efficiently cool the light emitting means for emitting and displaying the position and operation state of the heating coil, and can ensure good light emission characteristics and high durability. The present invention is not limited to induction heating cookers, and can be applied to various devices that perform light emission display using light emitting means.

DESCRIPTION OF SYMBOLS 21 Top plate 27 Main body 28 Cooking container 29 Heating coil 31 Control part 33 Magnetic-shield board 37 Cooling air path 38 Heating component 39 Blower 40 Light emission means 41 Light source 42 Opening 44 Light transmission part 45 Box 51 Light guide 52 Light-shielding plate 53 Light guide part 54 Ventilation hole 55 Projection part

Claims (2)

A top plate provided on the upper surface of the main body, on which the cooking container is placed, a heating coil provided at a lower portion of the top plate for heating the cooking container, a control unit for controlling the output of the heating coil, and An air blower for sending air to cool the heat generating component, and a space under the heating coil and the control unit provided below the heating coil to suppress leakage of magnetic flux from the heating coil and from the air blowing device. and a magnetic shield plate forming a cooling air passage, the outer periphery of the heating coil which a light-emitting means for emitting display position and operation state of said heating coils, to the light emitting means of the magnetic shielding plate Rutotomoni an opening is provided in a portion facing said light emitting means includes a light source that emits light, it comprises a box body provided with the light transmitting portion to the top plate side covers the light source, the opening to the light emitting means Cold the part facing the part Induction heating cooker provided with vent holes for the passage of air. A top plate provided on the upper surface of the main body, on which the cooking container is placed, a heating coil provided at a lower portion of the top plate for heating the cooking container, a control unit for controlling the output of the heating coil, and An air blower for sending air to cool the heat generating component, and a space under the heating coil and the control unit provided below the heating coil to suppress leakage of magnetic flux from the heating coil and from the air blowing device. and a magnetic shield plate forming a cooling air passage, the outer periphery of the heating coil which a light-emitting means for emitting display position and operation state of said heating coils, to the light emitting means of the magnetic shielding plate an opening is provided in a portion facing Rutotomoni, said light emitting means includes a light source that emits light, it comprises a box body provided with the light transmitting portion to the top plate side covers the light source, a portion of the box body The magnetic shield from the opening Ri protrudes down, induction heating cooker provided with vent holes for the passage of cooling air to the projecting portion of the box body.

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