JP4020933B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker.

  A conventional induction heating cooker heats an object to be heated by generating an eddy current in an object to be heated such as an iron pan placed on an insulating plate by a magnetic flux generated by a heating coil. This cooking device has less heat radiation to the object other than the object to be heated and has good thermal efficiency as compared with a cooking device of combustion system such as gas.

  In terms of configuration, an insulating plate on which an object to be heated is placed on the upper surface of the main body, a heating coil, an output control board, etc., and a cooling fan for cooling them are provided below the insulating plate. Generally, the configuration is directed upward from the rear portion.

  As such conventional examples, there are those shown in Patent Document 1 (Japanese Patent Laid-Open No. 2001-196153) and Patent Document 2 (Japanese Patent Laid-Open No. 2001-176651).

  The example shown in this patent document 1 is demonstrated using FIG. 4 and FIG. FIG. 4 is a cutaway plan view of a conventional induction heating cooker, and FIG. 5 is a side sectional view.

  In the figure, an insulating plate 2 for placing an object to be heated (not shown) on the upper surface of the main body 1, a plurality of heating coils 9, 10 and two output control boards 11 below the insulating plate 2, A cooling fan 12 for cooling, an intake port 5 opened upward on the right side of the rear part of the main body 1, an exhaust port 6 opened upward on the left side of the rear part of the main body 1, and cooling inside the main body 1 from the intake port 5 An intake duct 18 reaching the fan 12 is provided.

Then, a substrate cover 14 is provided so as to cover the upper output control board 11, an air passage is formed by the substrate holding base 17 and the substrate cover 14, and an operation to be a cooling air deflecting plate on the outlet side of the air passage. The first opening 15 serving as a main vent is provided at a position before the rear end of the left heating coil 9 and the second opening 16 following the right side is provided.

  The operation of the above configuration will be described.

The outside air sucked from the air inlet 5 by the cooling fan 12 reaches the cooling fan 12 through the air intake duct 18, and further passes through the output control board 11 in the ventilation path formed by the board cover 14 and the board holder 17. While cooling, the flow path is changed by the operation unit rear wall 19, most of which passes through the first opening 15 and the second opening 16 of the substrate cover 14, and the cooling air from the first opening 15 is left The cooling air coming out of the second opening 16 flows through the heating coil 9 to cool the right heating coil 10, and is then discharged from the exhaust port 6 to the outside of the main body 1.

  By the way, in such an induction heating cooker, the main ventilation path is constituted by a plurality of parts such as the intake duct 18, the substrate cover 14, the substrate holding base 17, and the operation unit rear wall 19 as described above. For this reason, there is a loss of cooling air, and it cannot be said that the cooling efficiency of the heating coils 9 and 10 and the output control board 11 is sufficient. In addition, there is a problem that it takes time to assemble.

JP 2001-196153 A JP 2001-176651 A

  As described above, in the conventional induction heating cooker, the cooling efficiency of the heating coils 9 and 10 and the output control board 11 is insufficient, and there is a problem in assemblability.

  An object of the present invention is to solve the above-mentioned problems, and to reduce cooling air loss, improve the cooling efficiency of the heating coil and the output control board, and improve the assembling property to reduce the cost. To do.

It is a feature of the present invention in order to achieve the above object, an insulating plate for placing an object to be heated on the upper surface of the main body is provided, and a plurality of heating coils to below the insulating plate, and an output control board, these In an induction heating cooker provided with a cooling fan for cooling the interior and provided with an intake port and an exhaust port opened upward at the rear of the main body, the output control board and the cooling fan are provided inside the main body. And a resin board case whose side and upper part are closed, and the board case includes a case air inlet provided at the upper position corresponding to the air inlet, and the upper part of the board case A plurality of cooling ports provided at a position, forming an air passage from the case intake port to the plurality of cooling ports in the substrate case, the cooling fan upstream of the air passage, and the downstream An output control board is arranged, and the output control The plates are stacked in the vertical direction, and the air flowing from the case intake port cools the stacked output control board and then reaches the plurality of cooling ports, and at least of the plurality of heating coils. One is disposed above the substrate case, at least one is disposed on the side of the heating means disposed above the substrate case , and at least one of the plurality of cooling ports is disposed above the substrate case. The heating coil is opened so as to cool, and at least one of the heating coils is opened so as to cool the heating coil arranged on the side of the heating means arranged above the substrate case.

  As described above, according to the induction heating cooker of the present invention, the board case has an integrated air path from the outside air suction part to the discharge part, and the output control board and A cooling fan is arranged to reduce the cooling air loss, improve the cooling efficiency of the heating coil and the output control board, and improve the assemblability to reduce the cost. .

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 is an external perspective view of the present invention, FIG. 2 is an internal plan view of the present invention, and FIG. 3 is a side sectional view of the present invention.

  In the figure, 1 is the main body of the induction heating cooker. Reference numeral 2 denotes an insulating plate on which an object to be heated (not shown) such as an iron pan is placed, and is provided horizontally on the upper surface of the main body 1.

  Reference numerals 3 and 4 denote induction heating units, which are two parts on the left and right sides, and are parts for induction heating the object to be heated (not shown).

  Reference numeral 5 denotes an air inlet, which is an opening opened upward at the rear part of the main body 1. Reference numeral 6 denotes an exhaust port, which is an opening portion opened upward at the rear portion of the main body 1. In this embodiment, the intake port 5 is disposed on the right side of the rear portion of the main body 1 and the exhaust port 6 is disposed on the left side.

  Reference numeral 7 denotes a grill heating unit provided on the left side of the front surface of the main body 1 for grilling fish and the like. Reference numeral 8 denotes an operation unit provided at the right front portion of the main body 1 for setting and operating each heating unit.

  A plurality of heating coils 9 and 10 are provided below the insulating plate 2 corresponding to the left and right induction heating units 3 and 4, and a high frequency current flows during induction heating to heat an object to be heated (not shown). Generate magnetic flux.

  Reference numeral 11 denotes an output control board which is provided below the insulating plate 2 and includes a control circuit which mainly controls the outputs of the plurality of heating coils 9 and 10. Reference numeral 12 denotes a cooling fan that cools the plurality of heating coils 9 and 10 and the output control board 11.

  A substrate case 13 for fixing the output control board 11 is provided below the right heating coil 10 and constitutes an integral air passage. The output control board 11 and the cooling fan 12 are arranged inside the air passage. A substrate case intake port 13 a is provided at a position corresponding to the rear intake port 5, and a plurality of cooling ports 13 b and 13 c are provided at positions corresponding to the plurality of heating coils 9 and 10.

  The substrate case intake port 13a is an opening that opens upward, and is configured to fit substantially inside the intake port 5 at the rear of the main body 1. is there.

  The first cooling port 13b is one of the openings from which the air blown from the cooling fan 12 is blown out from the substrate case 13, and is substantially at the upper center of the substrate case 13 so as to face the side portion of the corresponding heating coil 9. The cooling air blown out and opened to the left is blown to the left heating coil 9.

  The second cooling port 13 c is another one of the openings from which the air blown from the cooling fan 12 is blown out from the substrate case 13, and is located above the substrate case 13 so as to face the corresponding side of the heating coil 10. The cooling air blown out from the front side and opened rearward is blown to the right heating coil 10.

  The operation of the above configuration will be described.

When the user places an object to be heated (not shown) on the induction heating unit 3 or 4 of the insulating plate 2 and operates the operation unit 8 to set induction heating and start cooking, the output control board 11 is A control signal is output to the heating coil 9 or 10 below the induction heating unit 3 or 4. By this control signal, the heating coil 9 or 10 generates a magnetic flux by flowing a high-frequency current therein, and this magnetic flux causes an eddy current to flow through the object to be heated (not shown). Exothermic and heated.

  When cooking is started, the output control board 11 simultaneously outputs a control signal to the cooling fan 12, and the cooling fan 12 is driven by this control signal, sucks outside air from the board case intake port 13 a, and blows air to the front. I do.

  The air blown by the cooling fan 12 is blown to the output control board 11 disposed downstream of the cooling air inside the board case 13 to cool it. A part of the cooling air cools a part of the output control board 11, passes through the first cooling port 13 b opened toward the left at the upper center of the substrate case 13, and its direction is substantially horizontal left. Instead, the air is blown to the side of the left heating coil 9 to be cooled, and then discharged from the exhaust port 6 to the outside of the main body 1.

  The other part of the cooling air passes through the output control board 11, faces upward along the front wall surface of the substrate case 13, passes through the cooling port 13 c opened rearward on the upper front side of the substrate case 13, The direction is changed to a substantially horizontal rear, sprayed to the side of the right heating coil 10 and cooled, and then discharged from the exhaust port 6 to the outside of the main body 1.

  During cooking, the cooling operation is performed as described above. When cooking is finished, the output control board 11 stops outputting the control signal, and stops the operation of the heating coil 9 or 10 and the cooling fan 12.

  As described above, the air path extending from the substrate case intake port 13a serving as the outside air suction portion to the cooling ports 13b and 13c serving as the discharge portions is constituted by the integrated substrate case 13 and is formed in the substrate case 13. Since the output control board 11 and the cooling fan 12 are arranged, the cooling of the output control board 11 has no cooling air loss and high cooling efficiency.

  Further, by providing the first and second cooling ports 13b and 13c so as to be opposed to the side portions of the corresponding heating coils 9 and 10, dispersion of the cooling air blown from these is suppressed, and each heating coil 9 is concentrated. , 10, the cooling of the left and right heating coils 9, 10 is very high in cooling efficiency.

  In addition, although the said Example demonstrated the heating coils 9 and 10 as two, in the case of three or more, the number of the several cooling ports 13b and 13c provided in the board | substrate case 13 similarly, a position, and the blowing direction are shown. What is necessary is just to provide suitably according to the number and position of the heating coils 9 and 10, respectively.

  As described above, according to the induction heating cooker of the present invention, the insulating plate 2 for placing the object to be heated is provided on the upper surface of the main body 1, and a plurality of heating coils 9, 10 are provided below the insulating plate 2. In the induction heating cooker provided with the output control board 11, the cooling fan 12 for cooling them, and the board case 13 for fixing the output control board 12, the board case 13 is discharged from the outside air suction part. And the output control board 12 and the cooling fan 13 are arranged in the air passage of the substrate case 13, thereby suppressing the loss of cooling air and heating coils 9, 10. In addition, the cooling efficiency of the output control board 11 can be improved, and the assemblability can be improved to reduce the cost.

1 is an external perspective view of the present invention. It is an internal top view of this invention. It is side surface sectional drawing of this invention. It is a fracture | rupture top view of the induction heating cooking appliance of a prior art example. It is side surface sectional drawing of the induction heating cooking appliance of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Insulating plate, 3, 4 ... Induction heating part, 5 ... Intake port, 6 ... Exhaust port, 7 ... Grill heating part, 8 ... Operation part, 9, 10 ... Heating coil, 11 ... Output control board , 12 ... Cooling fan,
13 ... Substrate case, 13a ... Substrate case intake port, 13b, 13c ... Cooling port.

Claims (1)

An insulating plate for placing an object to be heated on the upper surface of the main body is provided, and a plurality of heating coils to below the insulating plate, and an output control board, provided a cooling fan for cooling them, upward to the rear body In an induction heating cooker provided with an opened intake port and an exhaust port,
Inside the main body, there is installed a resin substrate case in which the output control board and the cooling fan are housed and the side surface and upper part are closed,
The substrate case has a case intake port provided at the upper position corresponding to the intake port, and a plurality of cooling ports provided at the upper position of the substrate case ,
Forming an air passage from the case intake port to the plurality of cooling ports in the substrate case, disposing the cooling fan upstream of the air passage, and disposing the output control substrate downstream;
The output control boards are stacked in the vertical direction,
After the wind flowing in from the case intake port cools the output control board arranged in a stacked manner, it reaches the plurality of cooling ports,
At least one of the plurality of heating coils is disposed above the substrate case, and at least one is disposed on a side of the heating unit disposed above the substrate case .
At least one of the plurality of cooling ports opens to cool the heating coil above the substrate case, and at least one of the plurality of cooling ports is heated at the side of the heating means disposed above the substrate case. Induction heating cooker opened to cool the coil.

Images