JP2004186002A - Electromagnetic induction cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic induction cooker in which efficient heating can be carried out even if a small pan is used, and in which a pan of a regular size can be used also. <P>SOLUTION: This cooker is provided with a plurality of heater coils 2, 3 inside, drive circuits 4, 5 for driving these heater coils 2, 3 respectively, a cabinet 1 in which a cooling fan or the like is housed, and a top plate 8 which is mounted on the the upper opening part of the cabinet 1 and in which a display part of pan position is respectively installed at the right over the heater coils 2, 3. At least one of the heater coils is made to have the diameter different from that of other heater coils among the plurality of the heater coils 2, 3, and a pan position display part having the size respectively corresponding to the diameters of the heater coils 2, 3 is installed. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electromagnetic induction cooking device having a plurality of heating coils.
[0002]
[Prior art]
A conventional electromagnetic induction heating cooker has, for example, first and second heating units respectively corresponding to an independent high-frequency generator, and the first heating unit is constituted by a plurality of heating coils. One of the plurality of heating coils provided in the heating section of the heating coil is configured to supply a high-frequency current from the high-frequency generator of the second heating section when necessary (for example, see Patent Document 1). ).
[0003]
[Patent Document 1]
JP-A-5-347180 (page 3, FIG. 1)
[0004]
[Problems to be solved by the invention]
A conventional electromagnetic induction heating cooker generally uses a plurality of heating coils having substantially the same outer diameter, and these heating coils are installed under a top plate, and the top surface of the top plate is concentric with the heating coil. In addition, a pot position display portion having a size corresponding to the outer diameter of the heating coil is printed, and the pot is placed on one of the pan position display portions for cooking. For this reason, when a small-diameter pan is placed on the pan position display and cooking is performed, since the diameter of the pan is smaller than the diameter of the heating coil, magnetic flux leaks into the air and the pan can be efficiently heated. Did not.
[0005]
The present invention has been made in order to solve the above-mentioned problems, and an electromagnetic induction heating cooker that can efficiently heat even when using a small pan and can also use a normal-sized pan. It is intended to provide.
[0006]
[Means for Solving the Problems]
An electromagnetic induction heating cooker according to the present invention includes a housing in which a plurality of heating coils, a driving circuit for driving the heating coils, a cooling fan, and the like are housed, and an upper opening portion of the housing, A top plate provided with a pan position display unit directly above the heating coil, wherein at least one of the plurality of heating coils has a diameter different from the diameter of another heating coil, and the heating plate is provided on the top plate. A pan position display unit having a size corresponding to the diameter of the coil is provided.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
[Embodiment 1]
FIG. 1 is a cross-sectional view of a main part of an electromagnetic induction heating cooker (hereinafter, referred to as an electromagnetic cooker) according to Embodiment 1 of the present invention, and FIG. 2 is a plan view of a top plate of FIG. It is sectional drawing which shows a relationship.
[0008]
A large-diameter heating coil 2 and a small-diameter heating coil 3 are installed in a casing 1 of an electromagnetic cooker having a flange at an upper portion, and high-frequency driving circuits 4, 5 ( Hereinafter, simply referred to as a driving circuit). In this case, high-frequency power to be supplied corresponding to the diameter of the heating coil, such as 2 KW for the large-diameter heating coil 2 and 1 KW for the small-diameter heating coil 3, is set. Although not shown, a cooling fan for cooling the heat generating units such as the drive circuits 4 and 5 is provided in the housing 1.
[0009]
Further, the upper opening of the housing 1 is closed, and the upper surface of the top plate 8 on which the cooking pan is placed is concentric with the heating coil 2 corresponding to the large-diameter heating coil 2, and the heating coil 2. A large pot position display section 10 having a circular shape substantially equal to the outer diameter of the heating coil 3 is printed, and a small pot position display section 11 having a circular shape is also printed corresponding to the small-diameter heating coil 3.
The housing 1 has its flange locked to an edge of an opening provided in the table 25 or the like, and is housed and installed in the table 25 or the like. Although not shown, an operation unit and the like are provided on the front side (front side) of the housing 1.
[0010]
In the present embodiment configured as described above, when cooking in a small pan, the pan 26 is placed on the small pan position display section 11 as shown in FIG. Supply. At this time, since the small pot 26 is placed so as to cover almost the entire surface of the small pot position display section 11, magnetic flux hardly leaks from the small-diameter heating coil 3 into the air, and the pot 26 is efficiently heated. Cooking can be performed without wasting power.
[0011]
When cooking with a large pan, the pan is placed on the large pan position display section 10 and the large-diameter heating coil 2 is energized for cooking. Also in this case, since the magnetic flux hardly leaks from the large-diameter heating coil 2 into the air, the pot can be efficiently heated and cooked, and unnecessary power is not consumed.
[0012]
FIG. 3 is a plan view of a top plate of another example of the electromagnetic cooker according to the present embodiment.
In this example, two large-diameter heating coils 2 and one small-diameter heating coil 3 are provided in a housing 1, and a total of three heating coils 2 and 3 are provided. The coil 2 is arranged on the operation unit side (front side), and the small-diameter heating coil 3 is arranged on the back side of the operation unit. As shown in FIG. 3, the top plate 8 is provided with two large pot position display sections 10a and 10b corresponding to the large-diameter heating coil 2 on the operation section side. A small pot position display unit 11 is provided corresponding to the small-diameter heating coil 3.
[0013]
In the above description, the case where two large-diameter heating coils 2 and one small-diameter heating coil 3 are provided in the housing 1, that is, a total of three heating coils is shown, but four or more heating coils are provided. Alternatively, heating coils having different diameters from a large diameter, a medium diameter, and a small diameter may be provided, and a pan position display unit may be provided on the top plate 8 corresponding to these heating coils.
[0014]
FIG. 4 is a plan view of a top plate of still another example of the electromagnetic cooker according to the present embodiment. In this example, two large and small heating coils are provided in the depth direction from the operation unit side. In this case, it is more convenient to provide the large-diameter heating coil 2 on the operation unit side and the small-diameter heating coil 3 on the depth side of the operation unit. As shown in FIG. 4, the pan 8 is provided with a large pan position display unit 10 corresponding to the large-diameter heating coil 2 and a small pan position display unit 11 corresponding to the small-diameter heating coil 3. Has been. Although not shown, the cooling fan is desirably provided near the large-diameter heating coil 2 which generates a large amount of heat, so that the heat generating portion can be efficiently cooled.
[0015]
In the above description, the case where high-frequency power is supplied from the drive circuits 4 and 5 corresponding to the diameter of the heating coil, such as 2 KW to the large-diameter heating coil 2 and 1 KW to the small-diameter heating coil 3, for example, is shown. However, the frequency of the drive circuit 5 for driving the small-diameter heating coil 3 may be higher than the frequency of the drive circuit 4 for driving the other heating coils 2.
[0016]
By increasing the frequency of the high-frequency power supplied from the drive circuit, it is possible to heat a metal other than iron, for example, an aluminum pan, but if the high-frequency power input to the heating coil is large when heating the aluminum pan, The aluminum pot may float due to the repulsion effect of the induction. In order to prevent this, by using a small-diameter heating coil and increasing the frequency of the supplied high-frequency power, an aluminum pan can be efficiently heated by supplying a small amount of high-frequency power to the heating coil.
[0017]
[Embodiment 2]
FIG. 5 is a sectional view of a main part of an electromagnetic cooker according to Embodiment 2 of the present invention and a plan view of a top plate. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
In the present embodiment, an air passage 12 is provided surrounding drive circuits 4 and 5, an air inlet 13 provided on one side thereof is connected to cooling fan 9, and an air outlet 14 provided on the other side is connected to a ceiling. It is connected to an exhaust hole 17 provided in the plate 8. In addition, openings 15 and 16 are provided on the upper surface plate of the air passage 12 so as to correspond to the large-diameter heating coil 2 and the small-diameter heating coil 3, respectively.
[0018]
The operation and effects of the present embodiment are almost the same as those of the first embodiment. However, in the present embodiment, the air passage 2 is provided around the driving circuits 4 and 5 which generate a large amount of heat, and the cooling is performed. The driving circuits 4 and 5 are cooled by the cooling air from the fan 9 and a part of the cooling air is introduced from the openings 15 and 16 to the heating coils 2 and 3 to cool them. It can be cooled efficiently.
[0019]
[Embodiment 3]
FIG. 6 is a sectional view of a main part of an electromagnetic cooker according to Embodiment 3 of the present invention, a plan view of a top plate, and an explanatory view of an operation unit. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0020]
In the present embodiment, a lighting element row or block in which a plurality of lighting elements for displaying the output power of the drive circuits 4 and 5 by length are arranged in parallel in correspondence with the large-diameter heating coil 2 and the small-diameter heating coil 3. A first display unit 18 and a second display unit 19 are provided near the pan position display units 10 and 11 of the top plate 8, respectively. The operation plate 20 has a large-diameter heating coil 2 and a small-diameter A rotary or slide type first operation unit 21 and a second operation unit 22 for adjusting output power of the drive circuits 4 and 5 supplied to the heating coil 3 are provided respectively.
[0021]
The length L ₁ of the first display section 18 at the time of the maximum output of the drive circuit 4 is configured to be longer than the length L ₂ of the second display section 19 at the time of the maximum output of the drive circuit 5. When the first operation unit 21 and the second operation unit 22 are operated by the same rotation angle or slide amount (hereinafter, referred to as the same operation amount), the display length of the first display unit 18 and the second display the ratio of the display length of the section 19, in which the L ₁ vs. L _2.
[0022]
In the present embodiment, when the first operation unit 21 and the second operation unit 22 are operated by the same operation amount, the display length of the first display unit 18 to be displayed and the display length of the second display unit 19 are displayed. By setting the ratio of the length to L ₁ to L ₂ , the first operation unit 21 and the second operation unit 22 when both the large-diameter heating coil 2 and the small-diameter heating coil 3 are set to the maximum output are used. Can have the same operation amount. For this reason, the same component can be used for the first operation unit 21 and the second operation unit 22, and the cost can be reduced by sharing the components. In addition, since the first operation unit 21 and the second operation unit 22 are not attached by mistake during manufacture, the yield can be improved and the productivity can be improved.
[0023]
【The invention's effect】
The electromagnetic cooker according to the present invention has at least one of the plurality of heating coils provided in the housing having a diameter different from the diameters of the other heating coils, and a size corresponding to the diameter of the heating coil on the top plate. The pan position display section is provided, and the pan is placed on the pan position display section corresponding to the size of the pan, and the pan is adjusted, so that the magnetic flux from the heating coil does not leak into the air, and the pan can be efficiently placed. It can be heated, and power can be saved.
[Brief description of the drawings]
FIG. 1 is a sectional view of a main part of an electromagnetic cooker according to Embodiment 1 of the present invention.
FIG. 2 is a plan view of the top plate of FIG. 1 and a cross-sectional view illustrating a relationship between the top plate and a heating coil.
FIG. 3 is a plan view of a top plate according to another example of the first embodiment.
FIG. 4 is a plan view of a top plate according to yet another example of the first embodiment.
FIG. 5 is a sectional view of a main part of an electromagnetic cooker according to Embodiment 2 of the present invention and a plan view of a top plate.
FIG. 6 is a sectional view of a main part of an electromagnetic cooker according to Embodiment 3 of the present invention, a plan view of a top plate, and an explanatory view of an operation unit.
[Explanation of symbols]
Reference Signs List 1 housing, 2 large diameter heating coil, 3 small diameter heating coil, 4,5 drive circuit, 8 top plate, 9 cooling fan, 10,11 pan position display section, 12 air path, 18 first display section, 19 second display unit, 21 first operation unit, 22 second operation unit.

Claims (7)

A plurality of heating coils, a drive circuit for driving each of the heating coils, a housing accommodating a cooling fan, and the like, and a pan position display unit attached to an upper opening of the housing and directly above the heating coil, respectively. A top plate provided, wherein at least one of the plurality of heating coils has a diameter different from a diameter of another heating coil, and a pan having a size corresponding to the diameter of the heating coil on the top plate, respectively. An electromagnetic induction heating cooker comprising a position display unit. The electromagnetic induction heating cooker according to claim 1, wherein the maximum output power of the heating coils having different diameters is set corresponding to the diameters of the heating coils. The electromagnetic induction heating cooker according to claim 1, wherein when three heating coils are provided, a diameter of one heating coil is smaller than a diameter of another heating coil. The electromagnetic induction heating cooker according to claim 1, wherein when the plurality of heating coils are arranged in a depth direction from an operation unit side of the housing, a heating coil having a large diameter is arranged on the operation unit side. The electromagnetic induction heating cooker according to any one of claims 1 to 4, wherein the cooling fan is installed near a heating coil having a large diameter. 6. The electromagnetic induction heating according to claim 1, wherein a frequency of a driving circuit for driving a heating coil having a small diameter among the plurality of heating coils is higher than a frequency of a driving circuit for driving another heating coil. Cooking device. A housing in which a large-diameter heating coil and a small-diameter heating coil, a driving circuit for driving each of these heating coils, a cooling fan, and the like are housed, and which is attached to an upper opening of the housing and directly above the heating coil And a top plate provided with a pan position display unit, respectively.
A first display unit and a second display unit for displaying output powers of the large-diameter heating coil and the small-diameter heating coil in length, respectively, and output powers of the large-diameter heating coil and the small-diameter heating coil Having a first operation unit and a second operation unit for adjusting
The display length L1 of the _first display unit at the time of maximum output is configured to be longer than the display length L2 of the _second display unit at the time of maximum output, and the first operation unit and the second a display length of the first display unit an operation unit is displayed when the operation same operation amount, electromagnetic, characterized in that the ratio of the display length of the second display unit and the L ₁ vs. L ₂ Induction heating cooker.

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