JPH10214677A - Heating cooking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooking device excellent in operability without exerting an influence of heating by a heating means on an operation means while sufficiently ensuring the area of a heating cooking part. SOLUTION: In front of an user using this cooking device, an induction heating cooking parts 24 is arranged on a lefthand side and an induction heating cooking parts 25 is also arranged on a righthand side, and a heater heating cooking part 26 is arranged centrally at the back side. Operation and display parts 27, 28 and 29 corresponding to these heating cooking parts 24, 25 and 26 are provided at the front side of the induction heating cooking parts 24 and 25. In this constitution, the user touches touching parts 27a, 28a and 29a on the surface of a top plate 22 so that a capacitance type switch arranged in the lower portion of the top plate 22 can be operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a heating device for heating a cooking vessel, which is disposed below a top plate on which the cooking vessel is placed, wherein the heating means is controlled in accordance with an input operation performed by an operating means. Heating cooker.

[0002]

2. Description of the Related Art FIG. 12 is a perspective view showing a conventional example in which such a heating cooker is used by being incorporated in a worktop of a system kitchen. Although not specifically shown, the upper main body 1 of the cooking device has a rectangular box-shaped main body case with an open upper surface, and an electric heater such as a coil heater or a halogen heater using a halogen lamp emitting infrared rays as a heat source. Alternatively, a plurality of heating means including an induction heating coil for performing induction heating are arranged. A top plate 2 made of heat-resistant glass is provided on the upper surface of the main body case together with an outer frame 3 that supports the top plate 2.

On the surface of the top plate 2, a plurality of, for example, three cooking units 4 to 6 are provided corresponding to positions where the plurality of heating means are provided. Further, behind the outer frame 3 located on the back side of the top plate 2, an intake port 7 for taking in air for cooling electric components such as an induction heating coil is provided. The upper main body 1 is fitted from above into a fitting portion of a rectangular opening formed in the top plate 9 of the worktop 8 of the system kitchen, and is supported by the worktop 8 by the outer frame 3.

On the other hand, a lower body 10 is fitted into the lower part of the upper body 1 from the front side of the cooking table 8. On the front surface of the lower body 10, the roaster 1
1, an operation / display unit 12 is provided on the right side thereof for performing an operation for cooking and various displays according to the operation. In addition, these roaster parts 11
An exhaust port 13 for cooling air is provided in a horizontally long rectangular shape at a position located above the operation / display section 12.

As described above, in the conventional cooking device,
The operation / display unit 12 is provided collectively on a part of the front surface of the cooking table 8. This is because the surface of the top plate 2 becomes hot when a pot or the like is heated by an electric heater or a halogen heater.
Is preferably concentrated on a part of the front surface of the cooking table 8 which is hardly affected by the heat.

[0006]

However, since the operation / display unit 12 is provided on the near side / side surface of the cooking table 8 in this manner, the user can change his / her posture and operate / display the unit.
It was necessary to check the correspondence between the operation switches and the heating cooking units 4 to 6 by looking at the display unit 12 before operating. In addition, depending on the state of cooking, etc., each of the cooking units 4 to 6
Also, when confirming the heating power of each heating means in the above, the user has to change his posture and look at the operation / display unit 12 to confirm, and it cannot be said that the operability is necessarily good.

Therefore, it is conceivable to provide an operation / display unit 12 on the upper body 1 side.
When it is provided around the ceiling, there is a problem that the unevenness of the flat surface of the top plate of the system kitchen becomes large and the cleaning property is deteriorated.

Further, considering that the operation / display unit 12 is provided inside the top plate 2, the operation / display unit 12 is provided because the plurality of heating cooking units are controlled at one time. A large area is required, and a distance corresponding to the operation / display unit 12 is required in the depth direction. Therefore, there arises a problem that the area of the heating cooking unit (that is, the portion on the top plate 2 where the cooking vessel is heated) is pressed by the operation / display unit 12 and must be small. Furthermore, electric parts having high heat resistance must be used, and in addition, since the operation surface of the operation / display unit 12 becomes high in temperature, there is a problem that it is difficult to ensure safety for the user.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to ensure that the operation section is not affected by the heating by the heating section while ensuring a sufficient area of the heating cooking section. An object of the present invention is to provide a heating cooker with good operability.

[0010]

According to a first aspect of the present invention, there is provided a heating cooker comprising: a top plate made of a heat-resistant and insulating material on which a cooking vessel is placed;
A plurality of heating means disposed below the top plate for heating the cooking vessel; a plurality of operation means for performing input operations related to heating cooking; and each operation in accordance with each input operation to these operation means Control means for controlling each of the heating means corresponding to the means, wherein the plurality of heating means include at least one induction heating means, and the induction heating means performs cooking by a user. The operation means is disposed on the near side, and the operation means is disposed at a position corresponding to the plane of the top plate and on the front side of the induction heating means, and the input operation can be performed from the front side of the top plate. It is characterized by comprising.

According to this structure, the induction heating means itself does not have a heat source that directly generates heat at a high temperature. Is hardly affected by Further, since the operating means is divided and arranged on the front side so as to respectively correspond to the plurality of heating means, the depth dimension of the operating means is reduced, so that the cooking section can be widened.
Further, since the correspondence between the operating means and the heating means becomes clear, the operability is improved. Then, when cooking, the user can safely input the operating means from the front side of the top plate without changing the posture, so that the operability is also improved in this respect.

In this case, a cooling fan for blowing and cooling the heating control unit of the induction heating means is provided, and the operating means receives a part of the air flow from the cooling fan. It is good also as a structure arranged so that it may be cooled.

[0013] The induction heating means itself does not have a heat source that directly generates heat at a high temperature, but the cooking vessel itself is heated by the induction heating means, and the temperature of the top plate surface is reduced by heat conduction from the heated cooking vessel. It rises slightly.
Therefore, with such a configuration, the operating means is also cooled by the cooling fan for cooling the heating control unit of the induction heating means, so that the user can perform the input operation more safely.

Further, as described in claim 3, it is preferable that a projection is provided on a portion of the surface of the top plate located between the induction heating means and the operation means. With such a configuration, even if the position of the heated cooking container is moved to the near side by the user,
The protrusion can prevent the cooking container from reaching the position on the top plate corresponding to the position where the operation means is present. Therefore, it is possible to prevent the operating means from being affected by the heat of the heated cooking container, and to prevent an erroneous input operation from being performed by the cooking container.

[0015] In this case, as described in claim 4, it is preferable that the projection is formed separately from the top plate. With such a configuration, distortion or the like occurs when the top plate is molded. Since the factors are eliminated, the strength of the top plate does not decrease.

Further, as described in claim 5, a plurality of the protrusions may be intermittently arranged. With such a configuration, for example, even when water or juice in a cooking container spills on the front side of the projection, water or juice in the cooking container can escape from between the plurality of projections. Since there is no stagnation on the front side of the section, cleaning becomes easy.

According to a sixth aspect of the present invention, a plurality of the operation means are provided corresponding to the plurality of heating means, respectively, and the cooking container is placed on the top plate for each of the plurality of heating means. It is preferable that a display indicating a position and a position at which the operation unit is operated is provided, and a display indicating a correspondence relationship between each of the plurality of heating units and the operation unit is provided on the top plate. It is.

According to this structure, the user can easily grasp the correspondence between the plurality of heating means and the respective operating means for operating the plurality of heating means by displaying, and thus the operability can be improved. Is further improved.

In the above case, as described in claim 7, the operating means operates the control means by detecting a change in capacitance caused by the user touching the top plate surface. It is preferable that a signal be output. With such a configuration, the surface of the top plate corresponding to the position where the operation means is present can be made flat without any protrusions such as operation elements, and cleaning and the like become easier.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment in which the cooking device of the present invention is applied to a built-in heating cooking device used by being incorporated in a cooking table of a system kitchen will be described.
This will be described with reference to FIGS. FIG. 3 is a perspective view showing a state in which the heating cooker is incorporated in a worktop of a system kitchen.

The upper main body 21 of the cooking device has, for example, one coil heater (electric heater) 45 and two induction heating coils 44 (see FIG. 2) in a rectangular box-shaped main body case 21a (see FIG. 2) having an open upper surface. In FIG. 2, a plurality of heating means (only one is shown) are arranged. On the upper surface of the main body case, a top plate 22 made of heat-resistant glass is arranged together with an outer frame 23 supporting the top plate 22.

The top plate 22 is made of heat-resistant tempered glass having a flat surface and a thickness of about 4 mm, and has a property of transmitting red visible light well. On the surface of the top plate 22, as shown in FIG. 1 which is a plan view thereof, two induction heating cooking units are located on the front left and right sides corresponding to the positions where the induction heating coils are disposed. 24 and 25, and a heater heating / cooking unit 26 is located at the center rear side, corresponding to the position where the coil heater is provided. These heating cooking units 24-26
Is indicated by the circular indicia 24a-26a being printed on the surface of the top plate 22.

On the front side of the induction heating cooking units 24 and 25,
Three operation / display units 27, 28, and 29 are provided so as to be aligned in the left-right direction, corresponding to the heating cooking units 24, 25, and 26. These operation / display units 27,
Reference numerals 28 and 29 comprise contact portions 27a, 28a and 29a as operating means, and lighting display portions 27b, 28b and 29b.

The contact portions 27a, 28a and 29a are of a capacitance type, as will be described later, by rectangular indications 30, 31 and 32 whose positions are printed on the surface of the top plate 22. The switch disposed below the top plate 22 is shown as a portion that a user contacts.

Further, the lighting display units 27b, 28b and 29
b is an L disposed below the top plate 22.
The ED 55 (see FIG. 7) includes the contact portions 27a, 28a and 2
9A is a portion that is lighted and displayed by the red light emission when the light is turned on in response to the user touching 9a.

The operation / display unit 27 is located between the induction heating cooking units 24, 25 and the operation / display units 27, 28 and 29.
The operation / display units 27 and 2 are located near the
There are a plurality of projections 33, 34 and 35 provided intermittently with a length corresponding to the arrangement lengths of 8 and 29 respectively. These projections 33, 34, and 35 are formed with a height of about 5 to 10 mm using heat-resistant ceramic, rubber, or the like, and are adhesively fixed on the surface of the top plate 22.

On the surface of the top plate 22, between the operation / display sections 27, 28 and 29 and the indications 24a, 25a and 26a indicating the positions of the cooking sections 24, 25 and 26, respectively. Arrow-shaped indications 24b, 25b and 26b indicating the correspondence are printed.

An air inlet 36 for taking in air for cooling electric components such as an induction heating coil and a heater is provided behind the outer frame 23 located on the back side of the top plate 22. The upper main body 21 is fitted from above into a fitting portion of a rectangular opening formed in the top plate 38 of the worktop 37 of the system kitchen, and is supported by the worktop 37 by the outer frame 23.

On the other hand, a lower body 39 is provided below the upper body 21.
Is fitted from the front side of the cooking table 37. On the front surface of the lower main body 39, a roaster section 40 is provided at a central portion, and cooling air exhaust ports 41, 41 are provided at left and right sides thereof.

FIG. 2 shows the induction heating cooking section 2 of the upper main body 21.
FIG. 5 is a view showing a vertical cross section of a portion related to a heater cooking unit 5 and a heater heating cooking unit 26. Below the top plate 22, that is, on the back side, the operation circuit board 4 corresponding to the contact portion 28a extends from the near side to the far side (from left to right in FIG. 2) of the cooking table 37.
2, an operation switch (operation means) 43 formed on
An induction heating coil (induction heating means) 44 corresponding to the induction heating cooking unit 25 and an electric heater (heating means) 45 corresponding to the heater heating cooking unit 26 are arranged.

Below the induction heating coil 44, in order to perform heating by the induction heating coil 44, a frequency converter for generating a high-frequency current based on a rectified DC power supply (neither shown) of a commercial AC power supply. Equipment (heating control unit)
46 is configured and arranged on the circuit board 47. The frequency conversion device 46 includes a switching element and the like, and is connected to the induction heating coil 44 by a wiring 46a. On the right side of the frequency converter 46, a control circuit (control means) 48 mainly composed of a microcomputer is arranged on a control circuit board 49.

On the right side of the control circuit 48, a cooling fan 50 for cooling the frequency converter 46 is provided. The cooling fan 50 blows the air taken in from the upper intake port 36 forward (from right to left in FIG. 2) as cooling air, and the frequency converter 46 and the high-frequency current, which become relatively high in operation, flow. Accordingly, the induction heating coil 44 whose temperature rises is cooled.
In addition, a part of the cooling air is guided to the operation circuit board 42, and thereafter, the exhaust port 41 (FIG. 3)
Ref.) To the outside. Although not specifically shown, the induction heating cooking unit 24 is also provided with a frequency converter 46, a cooling fan 50, and the like configured in the same manner as described above.

FIG. 4 is a perspective view showing a capacitance type operation switch 43 formed on the operation circuit board 42 corresponding to the contact portion 28a. The operation switch 43 includes: a planar electrode 43a formed of copper on the operation circuit board 42;
And a shield electrode 43b (provided to determine the contact range of the operation switch 43 and grounded) surrounding the flat electrode 43a.

FIG. 5 shows an equivalent circuit of the operation switch 43 and an example of a circuit for detecting an operation signal of the operation switch 43. In FIG. 5, a planar electrode 43a, which is one electrode of a capacitor, is connected to a non-inverting input terminal of a comparator 51. The planar electrode 43a is also connected to a common connection point of a series circuit of the resistors 52a and 52b connected between the power supply and the ground.

The planar electrode 43a and the resistor 52
a and 52b are provided as detection units for detecting that the worker has touched the contact unit 28a. The inverting input terminal of the comparator 51 is directly grounded, and the output terminal of the comparator 51 is pulled up by a resistor 53 and connected to the input terminal 48a of the control circuit 48.

Then, as shown in FIG. 6, when the user touches the contact portion 28a on the surface of the top plate 22 with the finger 54, as shown by the broken line in FIG. A capacitor is formed, and the capacitor is charged from a power supply via a resistor 52a. Then, the level of the non-inverting input terminal of the comparator 51 changes from high to low for a short time. At that time, the output terminal of the comparator 51 is at a low level, and an operation signal is output to the control circuit 48. The comparator 51 is a signal processing unit that supplies an operation signal to the control circuit 48 based on the operation detected by the detection unit. An operation switch 43 configured similarly is provided for the contact portions 27a and 29a.

FIG. 7 shows the lighting display sections 27b and 28b.
And FIG. 29B is a cross-sectional view illustrating a state of the LED 55 disposed below the top plate 22 corresponding to FIGS. The control circuit 48 supplies a control signal to each corresponding LED 55 to turn on or off according to the operation of each of the contact portions 27a, 28a and 29a by the user.

Next, the operation of the present embodiment will be described with reference to FIGS. For example, the induction heating cooking unit 25
When performing induction heating cooking, the user first places, for example, an enamel iron pan (cooking container, not shown) suitable for induction heating on the induction heating cooking unit 25 indicated by the display 25a. . Then, the corresponding operation / display section 28 is confirmed by the arrow-shaped display 25b, and the portion corresponding to the on / off switch of the contact section 28a is touched with a finger.

When starting cooking, the control circuit 48
For example, the user contacts the contact portion 28a twice intermittently (O
N), the operation signal is turned ON / O within a certain time.
Turn on when FF / ON / OFF change (start heating)
The heating is started on the assumption that an operation corresponding to the operation has been performed.

FIG. 8A shows an example of a timing chart of the operation signal in this case. As one ON operation, for example, an operation having an output time of about 0.2 to 0.5 seconds is valid, and if there is a second ON operation within, for example, one second after the first ON operation, , (Operation of heating).

When the control circuit 48 determines that the operation corresponding to the input has been performed as described above, it outputs a control signal for starting heating to the frequency conversion device 46 (see FIG. 8B). Then, the frequency conversion device 46 starts operating, supplies a high-frequency current to the induction heating coil 44, and the pot itself is heated by induction heating to perform cooking. At this time, the control circuit 48 causes the LED 55 corresponding to the induction heating cooking unit 25 to light up and display.

The control circuit 48 also supplies a control signal to the cooling fan 50 to start blowing air, and
Blow cooling of electrical components that generate heat at a relatively high temperature, such as the switching element of No. 6. Note that the operation corresponding to the off (heating stop) is a case where only one ON operation is performed on the contact portion 28a.

As described above, according to the present embodiment, the induction heating cooking units 24 and 25 are arranged on the top plate 22 on the left and right sides of the front side where the user cooks, and the heater heating cooking units 26 are located on the center back side. And the operation / display units 27, 28 and 29 are arranged in front of the induction heating cooking units 24 and 25,
When the user makes contact with the contact portions 27a, 28a and 29a from the front side of the top plate 22, the capacitance type switch 43 arranged below the top plate 22 can be operated.

That is, the induction heating cooking units 24 and 25 themselves are:
Since there is no heat source that directly generates heat at a high temperature, the contact portions 27a, 28a and 29a disposed on the front side thereof and the operation switch 43 disposed therebelow are hardly affected by heat. Then, when cooking, the user can safely contact the contact portion 27 without changing the posture.
Since a, 28a and 29a can be input from the front side of the top plate 22, it is easy to use and the operability can be improved.

Further, since the operation switch 43 is of a capacitance type, the operation / display units 27, 28 and 29 can be made flat without protrusions, and cleaning can be easily performed. The control circuit 48 allows the user to intermittently contact (ON) the contact portion 28a twice,
If the operation signal changes to ON / OFF / ON / OFF within a certain period of time, it is considered that an operation corresponding to ON (start of heating) has been performed, so that the user may erroneously or unknowingly touch the contact portion 28a. Even in the case of contact, erroneous operation can be prevented.

Further, according to the present embodiment, a part of the cooling air of the cooling fan 50 that blows and cools the frequency converter 46 having the electric components is also introduced to the operation circuit board 42. Therefore, the induction heating coil 44 itself does not have a heat source that directly generates heat at a high temperature, but the pot itself is heated by the induction heating coil 44 and the temperature of the surface of the top plate 22 is increased by heat conduction from the heated pot. Even if it rises slightly, the operation switch 43 is
The contact portion 28a is also blown and cooled, so that the user can perform the input operation more safely.

Further, according to the present embodiment, a plurality of projections 33, intermittently are interposed between the induction heating cooking units 24 and 25 and the operation / display units 27, 28 and 29 on the surface of the top plate 22. 34 and 35 were provided.

Therefore, even if the position of the heated pan is moved to the near side by the user, the protrusion 33 is required to reach the position where the operation / display units 27, 28 and 29 are located. , 34 and 35. Further, as shown in FIG. 9, for example, the user mistakenly operates the heated pot 56 by using the operation / display unit 28 (27, 2).
9) Even if it is attempted to place it on the projection 34 (3
3, 35).

Accordingly, it is possible to prevent the operation display sections 27, 28, and 29 from being affected by the heat of the heated pot 56, and to make a mistake when the pot 56 is touched by the user. Performing an input operation can also be prevented.

Further, even if water or juice in the pot spills on the front side of the projections 33, 34 and 35,
Water and juice can escape from between 34 and 35,
Since there is no stagnation on the front side of the protrusions 33, 34, and 35, that is, the portions where the operation / display units 27, 28, and 29 are located, cleaning and the like become easy.

Further, since the projections 33, 34, and 35 are formed separately from the top plate 22, factors that cause distortion and the like when the top plate 22 is molded are eliminated, so that the strength of the top plate 22 is reduced. It does not lower.

In addition, according to the present embodiment, the operation / display units 27, 28 and 29 are connected to the heating / cooking units 24, 25 and 2 respectively.
6 and the top plate 22
Displays 24a, 2 indicating the positions of the operation / display units 27, 28 and 29 and the heating / cooking units 24, 25 and 26
5a and 26a are printed, and an arrow-shaped display 24b, 25b, and 26b indicating the corresponding relationship between the two is printed.
Was also printed.

Therefore, the user can select a plurality of cooking units 2.
4, 25 and 26, and each operation for operating these
Since the correspondence with the display units 27, 28 and 29 can be easily grasped by the above-mentioned respective displays, the usability is improved and the operability can be further improved.

Further, the operation / display units 27, 28 and 29
Are arranged in a line, so that the top plate 22
Since the above arrangement area is not required excessively, the arrangement area of the heating cooking units 24, 25 and 26 is not suppressed. Alternatively, it is not necessary to form the top plate 22 large.

FIGS. 10 and 11 show a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described below. The second embodiment differs from the first embodiment in the configuration of the operation switches and the operation signal detection circuit, and the other configurations are the same as those in the first embodiment.

FIG. 10 corresponds to FIG. 4 of the first embodiment, and a capacitance type operation switch (operation means) 58 formed on the operation circuit board 57 corresponding to the contact portion 28a. FIG. The operation switch 58 is formed of copper plating on the operation circuit board 57, and is constituted by a pair of comb-shaped electrodes 59a and 59b facing each other with a slight space therebetween. The comb-shaped electrodes 59a are commonly connected, and the comb-shaped electrodes 59b are connected to different detection circuits corresponding to the respective operation switches 53.

FIG. 11 corresponds to FIG. 5 of the first embodiment, and shows an example of a circuit for detecting an operation signal of the operation switch 58 while showing the operation switch 58 in an equivalent circuit. The comb electrode 59a is connected to an output terminal of an oscillator 60 that outputs a transmission signal of a predetermined frequency, and the comb electrode 59b is connected to an inverting input terminal of an inverting amplifier 62 via a resistor 62a.
9 are formed. This capacitor 59 corresponds to a detection unit. The output terminal of the inverting amplifier 62 is connected to the non-inverting input terminal of the comparator 63 in the next stage.

The output terminal of the comparator 63 is a resistor 64
And a capacitor 65 connected to the ground.
The common connection point of the capacitor 4 and the capacitor 65 is further connected to the non-inverting input terminal of the comparator 66 in the next stage. The output terminal of the comparator 66 is connected to the input terminal 48a of the control circuit 48. The contact portions 27a, 2
An operation switch 58 configured similarly is provided for 9a. The inverting amplifier 62, the comparator 63, the resistor 64, the capacitor 65, and the comparator 66 constitute a detection circuit (signal processing unit) 67.

Next, the operation of the second embodiment will be described. As in FIG. 6, when the user contacts the contact portion 28a with the finger 54, the capacitance of the capacitor 59 formed by the comb-shaped electrodes 59a and 59b increases. When the resonance frequency of the series resonance circuit formed by the capacitor 59 and the resistor 62a approaches the frequency of the oscillation signal output from the oscillator 60, the amplitude of the oscillation signal increases, and is applied to the non-inverting input terminal of the inverting amplifier 62. When the voltage exceeds the reference voltage, the oscillation signal is amplified and appears at the output terminal of the inverting amplifier 62.

As the amplitude of the oscillation signal appearing at the output terminal of the inverting amplifier 62 periodically exceeds the reference voltage applied to the inverting input terminal of the comparator 63 at the next stage,
The output terminal of the comparator 63 outputs a high-level signal. Thus, the output signal of the comparator 63 is
When the level of the integrated signal exceeds the reference voltage applied to the inverting input terminal of the comparator 66 at the next stage, the comparator 66 outputs a high-level signal to the control circuit 48. . As in the second embodiment, the capacitance type operation switch 58
Also, when the detection circuit 67 is configured, the same effect as in the first embodiment can be obtained.

The present invention is not limited to the embodiment described above and shown in the drawings, and the following modifications or extensions are possible. The configuration in which a part of the cooling air of the cooling fan 50 is also introduced toward the operation circuit board 42 and the operation switch 43 and the contact portion 28a are also blown and cooled, is based on the temperature of the operation switch 43 and the contact portion 28a during cooking. Depending on the degree of increase in the value. Projection 3
3, 34 and 35 may be provided as needed. In the case where the projections are provided, it is not always necessary to provide a plurality of projections intermittently, and one projection may be provided between the heating cooking units 24, 25 and 26 and the operation / display units 27, 28 and 29. . Further, the projections may be formed on the top plate 22 unless otherwise problematic when molding the top plate 22.
And may be configured integrally.

Printed on the surface of the top plate 22,
Each operation / display unit 27, 28 and 29 and each cooking unit 2
The indications 24a, 25a and 26a indicating the positions of 4, 25 and 26 and the indications 24b, 25b and 26b in the form of arrows indicating the corresponding relationship between them may be provided as necessary. The operating means is a capacitance type operation switch 4
3 and 58, for example, the top plate 2
2 may be constituted by a push button switch or the like configured to protrude the operation element from below the hole provided in the hole 2. The operation means does not need to be divided into a plurality of parts by being separated by a gap, may be divided into a plurality in terms of function, and need not necessarily be arranged in a line on the front side. The output time of the signal that enables the control circuit 48 to make one ON operation valid may be appropriately changed without being limited to 0.2 to 0.5 seconds. In addition, regarding a predetermined time period from the time when the first ON operation is performed to the time when the second ON operation is performed, it is considered that the operation corresponding to the ON (start of heating) is performed
It may be changed as appropriate without being limited to one second.

The number of heating means is not limited to three, but may be two or four or more as long as at least one induction heating means is included. The control circuit 48 determines that the operation corresponding to the input (start of heating) has been performed.
The contact pattern a may be appropriately changed without being limited to the one shown in the first embodiment. The present invention is not limited to a built-in heating cooker, and can be applied to a single heating cooker.

[0064]

Since the present invention is as described above,
The following effects are obtained. According to the cooking device of the first aspect, since the induction heating means itself does not have a heat source that directly generates heat at a high temperature, even if the operation means is arranged at a position corresponding to the front side and in the plane of the top plate. Since the user is hardly affected by the heat, the user can safely perform the input operation of the operation means from the front side of the top plate without changing the posture when cooking, thereby improving the operability. be able to. Further, since the operating means is divided and arranged on the front side so as to correspond to each of the plurality of heating means, the depth dimension of the operating means can be reduced and the cooking section can be widened. Since the correspondence between the two is clear, the operability can be further improved.

According to the second aspect of the present invention, even when the cooking vessel itself is heated by the induction heating means and the temperature of the top plate surface is slightly increased due to heat conduction from the heated cooking vessel, the induction heating means can be used. Since the operating means is also blown and cooled by the cooling fan for cooling the heating control unit of the heating means, the user can perform the input operation more safely.

According to the third aspect of the present invention, even if the position of the heated cooking container is moved to the near side by the user, the cooking container is placed on the top corresponding to the position where the operating means is present. Since the protrusion on the plate can be suppressed by the projection, the operating means can be prevented from being affected by the heat of the heated cooking container, and an erroneous input operation by the cooking container can be prevented. Can also be prevented.

According to the fourth aspect of the present invention, since the projection is formed separately from the top plate, factors that cause distortion or the like when the top plate is molded are eliminated.
It can be molded without reducing the strength of the top plate.

According to the fifth aspect of the present invention, since the plurality of protrusions are intermittently arranged, even if water or juice in the cooking container spills on the front side of the protrusions, the plurality of protrusions can be obtained. Water and juice in the cooking container can be released from between the portions, and can be easily cleaned without staying in front of the protrusion.

According to the heating cooker of the present invention, the user can easily grasp the correspondence between the plurality of heating means and the respective operating means for operating the plurality of heating means by the display. Therefore, the operability can be further improved.

According to the heating cooker of the present invention, the surface of the top plate corresponding to the position where the operating means is present can be made flat without protrusions such as operating elements, so that cleaning and the like can be performed more easily. It can be done easily.

[Brief description of the drawings]

FIG. 1 is a plan view of a top plate of a cooking device showing a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a portion of the heating cooker main body relating to an induction heating cooking section and a heater heating cooking section.

FIG. 3 is a perspective view showing a state in which the heating cooker is incorporated in a worktop of a system kitchen.

FIG. 4 is a perspective view showing a capacitance type operation switch formed on an operation circuit board;

FIG. 5 is an equivalent circuit diagram of the operation switch, and an electrical configuration diagram of a circuit that detects operation of the operation switch.

FIG. 6 is a cross-sectional view of an operation switch portion showing a state in which a user has touched a contact portion on the top plate surface with a finger;

FIG. 7: LED arranged below a top plate
Sectional view showing the state of

FIG. 8 is a timing chart showing an example of an operation signal corresponding to input (start of heating).

FIG. 9 is a view showing a case where a user erroneously attempts to place a heated pan on the operation / display unit.

FIG. 10 is a view corresponding to FIG. 4, showing a second embodiment of the present invention;

FIG. 11 is a diagram corresponding to FIG. 5;

FIG. 12 is a diagram corresponding to FIG. 3 showing a conventional technique.

[Explanation of symbols]

22 is a top plate, 24 and 25 are induction heating cooking units,
Reference numeral 26 denotes a heater heating / cooking unit, 24a, 25a and 26a and 24b, 25b and 26b indicate display, 27, 28 and 29 indicate operation / display units, 27a, 28a and 29a indicate contact units (operation means), 30, 31 and 32 Indicates 33, 3
4 and 35 are protrusions, 43 is an operation switch (operation means), 44 is an induction heating coil (induction heating means), 45 is an electric heater (heating means), 46 is a frequency converter (heating control section), and 48 is a control. A circuit (control means), 50 indicates a cooling fan, and 58 indicates an operation switch (operation means).

Claims (7)

[Claims] 1. A top plate made of a heat-resistant and insulating material on which a cooking container is placed, a plurality of heating means disposed below the top plate for heating the cooking container, and an input operation related to heating cooking A plurality of operating means for performing, and a control means for controlling a heating means corresponding to each operating means in accordance with each input operation to these operating means, the plurality of heating means at least The induction heating means is configured to include one induction heating means, and the induction heating means is arranged on the near side where the user performs cooking, and the operation means is a portion corresponding to a surface of the top plate and the induction A heating cooker which is arranged on the front side of the heating means and is configured so that the input operation can be performed from a surface side of the top plate. 2. A cooling fan for blowing and cooling a heating control unit of the induction heating means, wherein the operating means is arranged to be cooled by receiving a part of the blowing by the cooling fan. The heating cooker according to claim 1, wherein: 3. The cooking device according to claim 1, wherein a projection is provided on a portion of the surface of the top plate located between the induction heating unit and the operation unit. 4. The cooking device according to claim 3, wherein the projection is formed separately from the top plate. 5. The cooking device according to claim 3, wherein a plurality of the protrusions are intermittently arranged. 6. The top plate is provided with a display for each of the plurality of heating means, indicating a position on which the cooking vessel is to be placed and a position at which the operation means is to be operated. The heating cooker according to any one of claims 1 to 5, further comprising a display indicating a corresponding relationship between the heating means and the operation means. 7. The operating means is configured to detect a change in capacitance caused by the user touching the top plate surface and output an operating signal to the control means. The cooking device according to any one of claims 1 to 6, wherein