JP2019023978A - Induction heating cooker - Google Patents

Abstract

To provide an induction heating cooker in which a noise filter is placed at a proper position on the outside of a casing, when the noise filter cannot be housed in the casing.SOLUTION: In an induction heating cooker 10 including a casing 11 having a top plate 12 for placing a cooking container on the upper surface, an induction heating coil provided in the casing 11 and generating an induction magnetic field for heating the cooking container, a high frequency current supply circuit for supplying a high frequency current to the induction heating coil, a power cord 23 led out from the rear part of the casing 11, and supplying power from an external power supply to the high frequency current supply circuit, and a noise filter 24 for suppressing the noise generated in the high frequency current supply circuit and exiting from the power cord 23, the noise filter 24 is disposed on the outside of rear part of the casing 11 in contact with the outer wall thereof.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an induction heating cooker that cooks food by heating a cooking container with an induction magnetic field.

  Patent Document 1 below discloses an induction heating cooker installed on a counter in a kitchen. The induction heating cooker includes a casing having a top plate for placing a cooking container such as a pan on its upper surface, an induction heating coil provided in the casing for generating an induction magnetic field for heating the cooking container such as a pan, and induction heating. A high-frequency current supply circuit that supplies a high-frequency current to the coil, a power cord that is derived from the rear part of the casing and supplies power to the high-frequency current supply circuit from an external power source, and is generated in the high-frequency current supply circuit provided in the casing And a noise filter that suppresses noise from the power cord.

  When a cooking utensil such as a pan with ingredients is placed on the top surface of the top plate and the cooking switch is turned on, power is supplied to the high-frequency current supply circuit from an external power supply by a power cord, and the induction heating coil is supplied from the high-frequency current supply circuit. Is supplied with a high frequency current, and an induced magnetic field is generated on the top surface of the top plate. A cooking appliance such as a pan placed on the top plate generates Joule heat due to electrical resistance when an eddy current flows due to an induced magnetic field, and the food in the cooking appliance such as a pan placed on the top plate is cooked. . When high-frequency current is supplied from the high-frequency current supply circuit to the induction heating coil, noise generated in the high-frequency current supply circuit propagates through the power cord, but the noise is reduced by the noise filter and does not affect the surroundings. Yes.

JP 2012-150892 A

  In the induction heating cooker described in Patent Document 1 described above, a noise filter that suppresses noise generated from the high-frequency current supply circuit and coming out of the power cord is provided in the casing. In such an induction heating cooker, when the standard for noise is changed and a large noise filter needs to be mounted, or when the induction heating cooker is downsized, the noise filter cannot be accommodated in the casing. There was a thing. The present invention is to arrange the noise filter at an appropriate position outside the casing when it is necessary to mount a large noise filter or when the induction heating cooker is downsized and the noise filter cannot be accommodated in the casing. Objective.

  In order to solve the above-described problems, the present invention provides a casing having a top plate on which a cooking vessel is placed, an induction heating coil that is provided in the casing and generates an induction magnetic field that heats the cooking vessel, and induction heating. A high-frequency current supply circuit that supplies a high-frequency current to the coil, a power cord that is derived from the rear part of the casing and supplies power to the high-frequency current supply circuit from an external power source, and noise that is generated by the high-frequency current supply circuit and is emitted from the power cord An induction heating cooker provided with a noise filter for suppressing noise, wherein a noise filter is disposed outside the rear part of the casing in contact with the outer wall of the casing. It is.

  In the induction heating cooker configured as described above, since the filter box containing the noise filter is disposed outside the rear part of the casing in contact with the outer wall of the casing, the noise filter regardless of the size of the casing. Can be arranged.

  In the induction heating cooker configured as described above, a leg portion having a top plate positioned at a predetermined height is provided at the bottom of the casing, and the rear portion of the casing is in contact with the bottom wall of the casing. A filter box may be provided. In this case, the filter box or casing may be provided with a magnet, and the filter box may be attached to the bottom wall of the casing by the magnetic force of the magnet.

It is a perspective view of the induction heating cooking appliance of 1st Embodiment. FIG. 2 is an exploded view in which the internal structure of FIG. 1 is visible. It is a right view of FIG. It is a right view of the induction heating cooking appliance of 2nd Embodiment. FIG. 5 is a rear view of FIG. 4.

Hereinafter, an embodiment of an induction heating cooker of the present invention will be described with reference to the accompanying drawings.
(First embodiment)
As shown in FIG.1 and FIG.2, the induction heating cooking appliance 10 of 1st Embodiment heat-cooks the foodstuffs which were installed in installation surfaces, such as a counter of a kitchen, and put into cooking containers, such as a pan. A casing 11 having a top plate 12 on which a cooking container such as a pan is placed on the upper surface, an induction heating coil 20 that generates an induction magnetic field to heat the cooking container in the casing 11, and an induction heating coil 20 An inverter circuit (high-frequency current supply circuit) 21 that supplies a high-frequency current and a cooling fan 22 that cools the inverter circuit 21 are provided.

  As shown in FIGS. 1 to 3, the casing 11 has a substantially rectangular parallelepiped shape including the top plate 12, and the casing 11 is formed by processing a stainless steel material excluding the top plate 12. Legs 13 are provided at the four corners of the bottom surface of the bottom wall 11 a of the casing 11. The legs 13 are intended to provide a gap through which air passes between the bottom wall 11a of the casing 11 and the installation surface. Moreover, the leg part 13 is provided in the bottom part of the casing 11 so that height adjustment is possible, and height adjustment of the leg part 13 makes height of the upper surface (top plate 12) of the casing 11 desired height of a cook. Or it can be adjusted to the same height as that of other adjacent devices.

  As shown in FIG. 2, a suction port 11 a 1 for outside air is formed in the front portion of the bottom wall 11 a of the casing 11, and the suction port 11 a 1 is covered with a filter 14 so as to allow ventilation. An exhaust port 11b1 for discharging air to the outside is formed in the rear wall 11b of the casing 11, and the exhaust port 11b1 is covered with a filter (not shown) so as to allow ventilation. Further, the rear end portion of the top plate 12 protrudes slightly rearward from the rear wall 11b of the casing 11, so that a predetermined interval is maintained between the rear wall 11b of the casing 11 and the wall surface of the kitchen installed. Thus, the exhaust port 11b1 of the rear wall 11b of the casing 11 is not blocked.

  As shown in FIG. 3, a power cord 23 connected to an external power source is led out from the rear portion of the casing 11, and the power cord 23 supplies power to the inverter circuit 21 and the cooling fan 22 from the external power source. . Further, a noise filter 24 is disposed outside the rear portion of the casing 11. The noise filter 24 suppresses noise generated from the inverter circuit 21 and coming out of the power cord 23, and is interposed in the power cord 23 outside the casing 11. The noise filter 24 has a metal casing 24a, and the casing 24a is installed in contact with the rear wall (outer wall) 11b of the stainless steel casing 11.

  In the induction heating cooker 10 configured as described above, when a cooking utensil such as a pan with ingredients is placed on the upper surface of the top plate 12 and the cooking switch is turned on, the inverter circuit 21 is supplied with a power cord from an external power source. Power is supplied by the inverter 23, a high frequency current is supplied from the inverter circuit 21 to the induction heating coil 20, and an induction magnetic field is generated on the upper surface of the top plate 12. Joule heat is generated in a cooking utensil such as a pan placed on the top plate 12 by electric resistance when an eddy current flows due to an induced magnetic field, and the ingredients in the cooking utensil such as a pan placed on the top plate 12 are cooked. Is done. When a high frequency current is supplied from the inverter circuit 21 to the induction heating coil 20, noise generated in the inverter circuit 21 propagates through the power cord 12, but the noise is reduced by a noise filter 24 disposed outside the rear portion of the casing 11. It was possible to avoid affecting the surroundings.

  In the induction heating cooker 10 configured as described above, the noise filter 24 is disposed outside the rear portion of the casing 11 in contact with the rear wall (outer wall) 11 b of the casing 11. Regardless, the noise filter 24 can be provided. Further, since the metal casing 24a of the noise filter 24 is in contact with the stainless steel casing 11, the noise removed by the noise filter 24 can be grounded to the casing 11 via the metal casing 24a. The noise removal efficiency of the noise filter 2 could be increased. Furthermore, in this type of induction heating cooker 10, since the exhaust port 11b1 is provided in the rear wall 11b of the casing 11, the rear end portion of the top plate 12 protrudes rearward from the rear wall 11b of the casing 11. In this way, a sufficient space is formed on the rear wall 11b of the casing 11 on the wall surface of the kitchen serving as the installation location. For this reason, in this induction heating cooker 10, since the noise filter 24 is disposed outside the rear portion of the casing 11 in which sufficient space is formed for exhaust, the noise filter is not disturbed outside the rear portion of the casing 11. 24 could be arranged.

(Second Embodiment)
The induction heating cooker 10 of the first embodiment is installed on an installation surface such as a kitchen counter, but as shown in FIG. 4, the induction heating cooker 10 of the second embodiment is It is installed on the floor surface, and is provided with a long leg portion 13 in which the top plate 12 is positioned at a predetermined height at the bottom of the casing 11. In the case where the induction heating cooker 10 is installed on the floor surface of the kitchen using the long legs 13 as in the second embodiment, a sufficient space is secured below the bottom wall 11a of the casing 11. ing. For this reason, in the induction heating cooker 10 of 2nd Embodiment, as shown in FIG.4 and FIG.5, the noise filter 24 is arrange | positioned in the state which contacted the bottom wall 11a in the rear part of the casing 11. As shown in FIG. As shown in FIG. 5, the noise filter 24 is provided with a magnet 24b, and the noise filter 24 is attached to the bottom wall 11a of the casing 11 by the magnetic force of the magnet 24b. Note that a magnet may be attached to the bottom wall 11a of the casing 11 and the noise filter 24 may be fixed to the bottom wall 11a of the casing 11 by the magnetic force of the magnet.

  In addition, the noise filter 24 is not limited to the one attached by the magnetic force of the magnet 24b. The noise filter 24 may be attached to the bottom wall 11a of the casing 11 by engaging the flange with the hook, or the noise filter 24 may be attached to the lower surface of the bottom wall 11a of the casing 11 with a screw. There may be. Also in the induction heating cooker 10 of the second embodiment, since the noise filter 24 is disposed in contact with the outer wall of the casing 11 outside the rear portion of the casing 11 as in the first embodiment described above, the casing 11 The noise filter 24 can be provided regardless of the size.

  The noise filter 24 of the above embodiment is not limited to a three-layer input and may be a single-phase input.

  DESCRIPTION OF SYMBOLS 10 ... Induction cooking device, 11 ... Casing, 20 ... Induction heating coil, 21 ... High frequency electric current supply circuit (inverter circuit), 23 ... Power cord, 24 ... Noise filter.

Claims (3)

A casing having a top plate on the top surface for placing the cooking container;
An induction heating coil provided in the casing for generating an induction magnetic field for heating the cooking vessel;
A high-frequency current supply circuit for supplying a high-frequency current to the induction heating coil;
A power cord that is derived from the rear of the casing and supplies power to the high-frequency current supply circuit from an external power source;
An induction heating cooker including a noise filter that suppresses noise generated from the power cord generated in the high-frequency current supply circuit,
An induction heating cooker characterized in that the noise filter is disposed outside the rear part of the casing in contact with the outer wall of the casing. The induction heating cooker according to claim 1,
The bottom part of the casing is provided with a leg part so that the top plate is positioned at a predetermined height, and the noise filter is provided at the rear part of the casing in contact with the bottom wall of the casing. Induction heating cooker featuring. The induction heating cooker according to claim 2,
An induction heating cooker, wherein a magnet is provided on the noise filter or the casing, and the noise filter is attached to a bottom wall of the casing by a magnetic force of the magnet.

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