JP5808202B2 - Electromagnetic induction heating cooker - Google Patents

Description

  The present invention relates to an electromagnetic induction heating cooker.

  As a conventional electromagnetic induction heating cooker, an induction heating coil, a ferrite core disposed below the induction heating coil and serving as a magnetic path of magnetic flux generated from the induction heating coil, a coil base holding the induction heating coil and the ferrite core, There is a shield member for reducing a leakage magnetic field from the induction heating coil, and the shield member is constituted by a disk-shaped flat plate and fixed to the lower surface of the coil base (for example, see Patent Document 1).

  In such a case, when an eddy current flows through the shield member due to the magnetic field lines generated from the induction heating coil, a magnetic field line in the opposite direction to the magnetic field line generated by the induction heating coil is generated by the eddy current, and the leakage magnetic field line is near the shield member. That is, it cancels out below the induction heating coil. The shield member is partially provided with an opening, and is cooled by cooling air blown from the lower part of the induction heating coil.

JP 2011-108432 A (FIGS. 1 and 3)

  However, when the shield member is fixed to the lower surface of the coil base, the distance between the induction heating coil held by the coil base and the shield member is small and the effect of reducing the leakage magnetic field is great. Will also grow.

  In addition, since the induction heating coil, which is a heating element, is basically covered with a shield member, the exposed portion of the induction heating coil (the portion exposed to the cooling air) is reduced, and the cooling performance of the induction heating coil is reduced. There was a difficult point. This was also true for other heat generating components mounted on the coil unit.

  The present invention has been made to solve the above-described problems, and can reduce the heat generation of the shield member and reduce the leakage magnetic field by the shield member without deteriorating the cooling performance of the coil unit. For the purpose.

An electromagnetic induction heating cooker according to the present invention holds at least an induction heating coil, a ferrite core disposed below the induction heating coil and serving as a magnetic path of magnetic flux generated from the induction heating coil, and the induction heating coil and the ferrite core. A coil unit having a coil base, a shield member provided below the coil unit for reducing a leakage magnetic field from the induction heating coil, and a plurality of first holes for ejecting cooling air for cooling the coil unit. A coil unit disposed below the shield member, and the coil unit is elastically held via a plurality of springs with respect to the jet plate and the shield member, and is arranged in a state of floating a predetermined distance, the shield member has a plurality of second holes are formed corresponding to the plurality of first holes in the jet plate, the second hole matches the first hole of the jet plate It is fixed to the jet plate upper surface so that the upper surface of the jet plate, is provided with a ridge along the outer periphery of the shield member.

In the electromagnetic induction heating cooker according to the present invention, the coil unit is elastically held via a plurality of springs with respect to the jet plate and the shield member, and is arranged in a state where it floats for a predetermined distance, and cooling that cools the coil unit. A shield member having a plurality of second holes corresponding to the first holes of the jet plate is provided on the upper surface of the jet plate having a plurality of first holes for jetting wind, and the second hole is the jet plate. Since the ridge along the outer periphery of the shield member is provided on the upper surface of the jet plate, the distance between the induction heating coil and the shield member is increased. In addition, the heat generation of the shield member can be reduced, and the protrusion can prevent the wiring from being damaged by the edge of the shield member, thereby ensuring safety during assembly. Further, the shield member does not hinder the flow of cooling air, and the leakage magnetic field can be reduced without deteriorating the cooling performance of the coil unit.

It is a perspective view which removes and shows the top plate of the electromagnetic induction heating cooking appliance concerning the embodiment of the present invention. It is a perspective view which removes and shows the top plate and coil unit of the electromagnetic induction heating cooking appliance which concerns on embodiment of this invention. It is a top view which removes and shows the top plate and coil unit of the electromagnetic induction heating cooking appliance which concerns on embodiment of this invention. It is a disassembled perspective view which shows the relationship between the shield member of the electromagnetic induction heating cooking appliance which concerns on embodiment of this invention, and a jet plate. It is a top view which shows the state which fastened the shield member of the electromagnetic induction heating cooking appliance which concerns on embodiment of this invention to the jet plate. FIG. 6 is a cross-sectional view taken along line AA in FIG. 5. FIG. 6 is a cross-sectional view taken along line B-B in FIG. 5. It is the side view seen from the (a) direction of FIG. It is a perspective view which shows the state which fastened the shield member of the electromagnetic induction heating cooking appliance which concerns on embodiment of this invention to the jet plate. It is a top view which shows the coil unit of the electromagnetic induction heating cooking appliance which concerns on embodiment of this invention. It is CC sectional view taken on the line of FIG. It is a bottom view which shows the coil unit of the electromagnetic induction heating cooking appliance which concerns on embodiment of this invention. It is the side view seen from the B direction of FIG. It is a top view which shows the relationship between the coil unit of the electromagnetic induction heating cooking appliance which concerns on embodiment of this invention, a shield member, and a jet plate. It is DD sectional view taken on the line in FIG.

FIG. 1 is a perspective view of the electromagnetic induction heating cooker according to the embodiment of the present invention with the top plate removed, and FIG. 2 shows the electromagnetic induction heating cooker according to the embodiment of the present invention with the top plate and coil unit removed. FIG. 3 is a plan view of the electromagnetic induction heating cooker according to the embodiment of the present invention with the top plate and the coil unit removed.
The electromagnetic induction heating cooker according to the embodiment of the present invention is attached so as to cover a heating cooker main body 1 (hereinafter referred to as a main body 1) that constitutes an outer shell and an upper opening surface of the main body 1 as shown in FIGS. A top plate (not shown), an operation unit 2 disposed on the front surface of the main body 1, and a grill door 3 provided adjacent to the operation unit 2 on the front surface of the main body 1 are provided.

  The top plate is used to place a cooking container on the upper surface when cooking, and is made of heat-resistant tempered glass. Under the top plate, two coil units having different heating capacities are arranged on the left and right sides, but here, because the invention relates to the coil unit 4 on the right side with a smaller heating capacity, The description of the coil unit located is omitted. The coil unit 4 is provided with small and large diameter ring-shaped induction heating coils 5 and 6. A jet plate 7 and a plate-like shield member 8 are installed on the main body 1 below the coil unit 4. The coil unit 4 is elastically held via a plurality of springs (not shown) and floated for a predetermined distance with respect to the jet plate 7 and the shield member 8, and is pressed against the lower surface of the top plate. Therefore, the spring plate 9 is provided at a plurality of locations in the circumferential direction of the jet plate 5 and spring receivers 27 (see FIG. 12) at a plurality of locations in the circumferential direction on the lower surface of a coil base 21 (FIG. 12) described later of the coil unit 4. 12) is provided. The grill door 3 covers an opening of a grill warehouse for cooking fish and the like, and can be opened by a user pulling a handle provided on the grill door 3 toward the user.

  When a high frequency current flows through the induction heating coil constituting the coil unit 4 via an inverter circuit (not shown), a magnetic flux corresponding to the high frequency current is generated from the heating coil, and the magnetic flux generates a top plate. The pot of the cooking container placed is induction-heated.

FIG. 4 is an exploded perspective view showing the relationship between the shield member and the jet plate of the electromagnetic induction heating cooker according to the embodiment of the present invention, and FIG. 5 shows the shield member of the electromagnetic induction heating cooker according to the embodiment of the present invention. FIG. 6 is a cross-sectional view taken along line AA in FIG. 5, FIG. 7 is a cross-sectional view taken along line BB in FIG. 5, and FIG. FIG. 9 is a perspective view showing a state in which the shield member of the electromagnetic induction heating cooker according to the embodiment of the present invention is fastened to the jet plate.
As shown in FIG. 4, the jet plate 7 is formed with a plurality of holes for ejecting cooling air, that is, first holes 7a. From the intake port 11 formed on the back side of the main body 1 shown in FIGS. Air sucked in by a blower (not shown) is ejected from the first hole 7 a and is exhausted through the air passage 12 through the exhaust port 13 formed on the back side of the main body 1.

  On the other hand, a plurality of second holes 8a corresponding to the first holes 7a of the jet plate 7 are formed in the shield member 8 as shown in FIGS. 4 to 9, and the shield member 8 has the second holes. 8 a is aligned with the first hole 7 a of the jet plate 7 and fixed to the upper surface of the jet plate 7. The diameter of the second hole 8a of the shield member 8 is formed to be larger than the diameter of the first hole 7a of the jet plate 7, so that an assembly error or the like can be absorbed. The shield member 8 and the substrate disposed above and the induction heating coils 5 and 6 are cooled by the cooling air passing from the first hole 7a to the second hole 8a. As described above, the air is exhausted from the exhaust port 13 formed on the back side of the main body 1 through the air passage 12.

  Further, a plurality of ridges 7b are provided along the outer periphery of the shield member 8 as shown in FIGS. 4 and 5 at the peripheral edge of the upper surface of the jet plate 7, and these ridges 7b are formed by the edges of the shield member 8. It prevents the wiring from being damaged and further ensures safety during assembly.

  Further, as shown in FIG. 4, a protruding portion 8 b is provided on one side of the outer peripheral edge of the shield member 8, and a receiving portion in which the protruding portion 8 b of the shield member 8 can be inserted and fixed to the jet plate 7. A bridge 7c is provided, which facilitates positioning (temporary fixing).

  Further, a screw hole 7d is provided on the opposite side of the insertion fixing portion of the jet plate 7, that is, on the side opposite to the bridge, and a screw insertion hole 8c is formed at a position corresponding to the screw hole 7d of the shield member 8. The screws 14 are fastened together. Thereby, the shield member 8 can be prevented from being lifted, contact with the induction heating coil or the like can be prevented, and safety during assembly work can be easily ensured.

  By the way, although the infrared sensor which detects the infrared rays radiated | emitted from the to-be-heated material is attached to the coil unit 4, the unit of an infrared sensor is large sized compared with other electronic components. Therefore, the shield member 8 is formed with a relief by a notch 8d at a portion corresponding to the infrared sensor, and the jet plate 7 is also formed with a hole 7e.

10 is a plan view showing a coil unit of the electromagnetic induction heating cooker according to the embodiment of the present invention, FIG. 11 is a cross-sectional view taken along the line CC of FIG. 10, and FIG. 12 is an electromagnetic induction according to the embodiment of the present invention. The bottom view which shows the coil unit of a heating cooker, FIG. 13 is the side view seen from the B direction of FIG.
As shown in FIGS. 10 to 13, the coil unit 4 includes a coil base 21, a plurality of ferrite cores 22 provided on the coil base 21, a plurality of induction heating coils 5 and 6, and infrared rays radiated from an object to be heated. An infrared sensor 23 for detecting temperature, a plurality of thermistors 24 for temperature adjustment, a plurality of spacers 25 for defining the position of the induction heating coil 6 in the coil base 21, and a side plate 21a of the coil base 21 A magnetic shield ring 26 is provided so as to cover the entire outer periphery, and a sensor case 23a of the infrared sensor 23 is disposed so as to protrude downward.

  The magnetic shield ring 26 is used to make it difficult for the magnetic flux generated from the induction heating coils 5 and 6 to leak out of the coil unit 4, so that the operator can see the top and bottom of the coil unit 4 during assembly work. A caulking portion 26a for closing the ring is located at the upper position.

14 is a plan view showing the relationship among the coil unit, shield member, and jet plate of the electromagnetic induction heating cooker according to the embodiment of the present invention, and FIG. 15 is a cross-sectional view taken along the line D-D in FIG.
In the electromagnetic induction heating cooker according to the embodiment of the present invention, the shield member 8 having a plurality of second holes 8a corresponding to the first holes 7a of the jet plate is replaced with the coil base 21 as shown in FIGS. And is fixed to the upper surface of the jet plate 7 arranged at a predetermined distance below, so that the distance between the induction heating coils 5 and 6 and the shield member can be increased, and heat generation of the shield member can be achieved. Can be small. Furthermore, since the shield member does not hinder the flow of cooling air, the leakage magnetic field can be reduced without deteriorating the cooling performance of the induction heating coils 5 and 6 and other heat generating components mounted on the coil unit 4. it can.

  DESCRIPTION OF SYMBOLS 1 Heating cooker main body, 2 Operation part, 3 Grill door, 4 Coil unit, 5, 6 Induction heating coil, 7 Jet plate, 7a 1st hole, 7b Projection, 7c Bridge (receiving part), 7d Screw hole, 7e hole, 8 shield member, 8a second hole, 8b protrusion, 8c screw insertion hole, 8d notch, 9 spring seat, 11 air inlet, 12 air passage, 13 exhaust port, 14 screw, 21 coil base, 21a Side plate, 22 ferrite core, 23 infrared sensor, 23a sensor case, 24 thermistor, 25 spacer, 26 magnetic shield ring, 26a caulking part, 27 spring support.

Claims (10)

A coil unit having at least an induction heating coil, a ferrite core disposed below the induction heating coil and serving as a magnetic path of a magnetic flux generated from the induction heating coil, and a coil base holding the induction heating coil and the ferrite core;
A shield member for reducing a leakage magnetic field from the induction heating coil provided below the coil unit;
A plurality of first holes for ejecting cooling air that cools the coil unit, and a jet plate disposed below the shield member,
The coil unit is arranged in a state where it is elastically held via a plurality of springs and floats a predetermined distance with respect to the jet plate and the shield member,
The shield member has a plurality of second holes corresponding to the plurality of first holes of the jet plate, and the second hole matches the first hole of the jet plate. It is fixed on the upper surface of the jet plate,
Wherein the upper surface of the jet plate, characterized electrostatic magnetic induction heating cooker in that a ridge along the outer periphery of the shield member. A coil unit having at least an induction heating coil, a ferrite core disposed below the induction heating coil and serving as a magnetic path of a magnetic flux generated from the induction heating coil, and a coil base holding the induction heating coil and the ferrite core;
A shield member for reducing a leakage magnetic field from the induction heating coil provided below the coil unit;
A plurality of first holes for ejecting cooling air that cools the coil unit, and a jet plate disposed below the shield member,
The coil unit is arranged in a state where it is elastically held via a plurality of springs and floats a predetermined distance with respect to the jet plate and the shield member,
The shield member has a plurality of second holes corresponding to the plurality of first holes of the jet plate, and the second hole matches the first hole of the jet plate. It is fixed on the upper surface of the jet plate,
Provided with a projecting portion on one side of the outer periphery of the shield member, the shield member and the protrusion inserted securable features and to that conductive magnetic induction heating cooker in that a receiving portion of the jet plate . The electromagnetic induction heating cooker according to claim 2, wherein a fastening portion for fastening the shield member to the jet plate is provided on the opposite side of the insertion fixing portion of the shield member and the jet plate . . A coil unit having at least an induction heating coil, a ferrite core disposed below the induction heating coil and serving as a magnetic path of a magnetic flux generated from the induction heating coil, and a coil base holding the induction heating coil and the ferrite core;
A shield member for reducing a leakage magnetic field from the induction heating coil provided below the coil unit;
A plurality of first holes for ejecting cooling air that cools the coil unit, and a jet plate disposed below the shield member,
The coil unit is arranged in a state where it is elastically held via a plurality of springs and floats a predetermined distance with respect to the jet plate and the shield member,
The shield member has a plurality of second holes corresponding to the plurality of first holes of the jet plate, and the second hole matches the first hole of the jet plate. It is fixed on the upper surface of the jet plate,
Further comprising an infrared sensor for detecting infrared rays emitted from the object to be heated, wherein the shield member is characterized as to that conductive magnetic induction heating cooking that consists of a flat plate in which a partially cut-out to install the infrared sensor vessel. The electromagnetic induction heating cooker according to any one of claims 1 to 4, wherein a diameter of the second hole of the shield member is made larger than a diameter of the first hole of the jet plate . A coil unit having at least an induction heating coil, a ferrite core disposed below the induction heating coil and serving as a magnetic path of a magnetic flux generated from the induction heating coil, and a coil base holding the induction heating coil and the ferrite core;
A shield member for reducing a leakage magnetic field from the induction heating coil provided below the coil unit;
A plurality of first holes for ejecting cooling air that cools the coil unit, and a jet plate disposed below the shield member,
The shield member has a plurality of second holes corresponding to the plurality of first holes of the jet plate, and the second hole matches the first hole of the jet plate. It is fixed on the upper surface of the jet plate,
An electromagnetic induction heating cooker characterized in that a ridge along the outer periphery of the shield member is provided on the upper surface of the jet plate. A coil unit having at least an induction heating coil, a ferrite core disposed below the induction heating coil and serving as a magnetic path of a magnetic flux generated from the induction heating coil, and a coil base holding the induction heating coil and the ferrite core;
A shield member for reducing a leakage magnetic field from the induction heating coil provided below the coil unit;
A plurality of first holes for ejecting cooling air that cools the coil unit, and a jet plate disposed below the shield member,
The shield member has a plurality of second holes corresponding to the plurality of first holes of the jet plate, and the second hole matches the first hole of the jet plate. It is fixed on the upper surface of the jet plate,
An electromagnetic induction heating cooker, wherein a protrusion is provided on one side of the outer peripheral edge of the shield member, and a receiving part into which the protrusion of the shield member can be inserted and fixed is provided on the jet plate. 8. The electromagnetic induction heating cooker according to claim 7 , wherein a fastening portion for fastening the shield member together with the jet plate is provided on the opposite side of the insertion fixing portion of the shield member and the jet plate. . A coil unit having at least an induction heating coil, a ferrite core disposed below the induction heating coil and serving as a magnetic path of a magnetic flux generated from the induction heating coil, and a coil base holding the induction heating coil and the ferrite core;
A shield member for reducing a leakage magnetic field from the induction heating coil provided below the coil unit;
A plurality of first holes for ejecting cooling air that cools the coil unit, and a jet plate disposed below the shield member,
The shield member has a plurality of second holes corresponding to the plurality of first holes of the jet plate, and the second hole matches the first hole of the jet plate. It is fixed on the upper surface of the jet plate,
An electromagnetic induction heating cooker, further comprising an infrared sensor for detecting infrared rays emitted from an object to be heated, wherein the shield member is formed of a flat plate with a portion where the infrared sensor is installed cut out. The electromagnetic induction heating cooker according to any one of claims 7 to 9 , wherein a diameter of the second hole of the shield member is larger than a diameter of the first hole of the jet plate.

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