JP2003114028A - Heat cooking device and heat cooking system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the probability of cutting of the optical signal sent from a light projecting section for communication and improve the reliability of communication. SOLUTION: A heat cooking device 12 is provided with heating coils 20 and 21 for electromagnetic induction heating below a top plate 17, a central heater 22, and a roaster 46. Four infrared LEDs 31 to 34 are arranged below the top plate 17 so as to avoid pan placing sections 39 to 41. When the infrared LEDs 31 to 34 emit light along with the use of the heat cooking device 12, infrared optical signals are transmitted to the photodiode 35 of a range hood fan 13 positioned at an upper position through the top plate 17. When the photodiode 35 receives the optical signal, the fan device of the range hood fan 13 is driven and controlled based on the optical signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker having a communication light projecting section, and a heating cooking system configured by combining the heating cooker and a ventilation device.

[0002]

A heating and cooking system constructed by combining a heating cooker and a ventilation device is as follows:
For example, the one disclosed in Japanese Patent Laid-Open No. 10-57260 is known. This has a structure as shown in FIG. That is, the worktop 2 is provided on the upper end of the cabinet 1 of the sink, and the worktop 2 is
A plurality of stoves 3 constituting the heating cooker are installed. A range hood fan 4 that constitutes a ventilation device is disposed above the stove 3. The range hood fan 4 is provided with a fan device 6 having a fan motor 6a and a fan 6b inside a hood body 5 and is mounted on a wall surface.

A remote control switch 7 for communication is provided at the upper part of the front surface of the cabinet 1 so that it can be taken in and out. The remote control switch 7 includes a communication light projecting unit 7 that emits an infrared light signal.
a and an operation switch are provided. On the other hand, a communication light receiving portion 8 is provided in the lower front portion of the hood body 5 of the range hood fan 4.

In the above structure, when the user operates the operation switch of the remote control switch 7 in a state where the remote control switch 7 is projected forward as shown in the figure, infrared rays are emitted from the communication light projecting section 7a. Is emitted upward. When the communication light receiving unit 8 of the range hood fan 4 receives the optical signal, the operation of the fan device 6 is controlled according to the signal.

However, the above-mentioned conventional structure has the following drawbacks. That is, the communication projector 7
The remote control switch 7 provided with a is arranged in the upper front part of the cabinet 1 and below the worktop 2. Therefore, when the user operates the remote control switch 7, an infrared light signal emitted from the communication light projecting unit 7a is transmitted to a part of the body such as the user's hand, arm, or head, or the stove 3. There is a high probability that a part of a cooking container such as a pot set at will be interrupted, and communication reliability will be low.

The present invention has been made in view of the above circumstances, and a first object of the present invention is to reduce the probability that an optical signal emitted from a communication light projecting unit will be cut off and improve communication reliability. The second purpose is to provide a heating cooker capable of reducing the probability that an optical signal transmitted from the heating cooker to the ventilation device side is cut off and improving communication reliability. To provide.

[0007]

In order to achieve the above-mentioned first object, the heating cooker of the invention of claim 1 is a top plate on which a cooking container such as a pot is placed, and a top plate of this top plate. It is characterized by comprising a heating means for cooking arranged below, and a communication light projecting section arranged below the top plate and emitting an optical signal upward through the top plate.

According to the above means, the communication light projecting section is arranged below the top plate, and the optical signal emitted from the communication light projecting section is transmitted upward through the top plate. It At this time, the probability that a part of the user's body is located above the top plate is low, and thus the probability that the optical signal emitted from the communication light projection unit is blocked by a part of the user's body is low. Get lower. Further, since the cooking container placed on the top plate is usually placed at a place corresponding to the heating means, the communication light projecting unit is placed at a position not disturbed by the cooking container placed on the top plate. By arranging the
The probability of being blocked by the cooking container placed on the top plate can also be reduced. Therefore, it is possible to reduce the probability that the optical signal emitted from the communication light projecting unit is blocked and improve the reliability of communication.

According to a second aspect of the present invention, the heating means is arranged such that the center of the heating means is in front of the central portion of the top plate in the front-rear direction, and the communication light projecting portion has the central portion of the top plate in the front-rear direction. It is characterized in that it is arranged behind the section.

According to the above-mentioned means, since the heating means is arranged on the front side of the top plate and the communication light projecting section is arranged on the rear side, the optical signal emitted from the communication light projecting section of the user's body is detected. The probability of being interrupted by a part of the cooking container placed on the top plate corresponding to the heating means is further reduced, and the reliability of communication can be further improved.

The invention of claim 3 is characterized in that a plurality of communication light projecting portions are arranged below the top plate. According to the above-mentioned means, since there are a plurality of communication light projecting portions, even if the optical signal emitted from one communication light emitting portion is interrupted, it is emitted from the other communication light emitting portion. The optical signal has a high probability of being effectively transmitted, so that the reliability of communication can be further improved. Further, even if the relative position with respect to the communication light receiving portion that receives the optical signal is deviated, the probability of transmission becomes high.

The invention of claim 4 is characterized in that a plurality of heating means are arranged below the top plate. When there are a plurality of heating means, a plurality of cooking containers are often placed on the top plate, and the probability that the optical signal emitted from the communication light projecting unit will be blocked by the cooking containers is high. By arranging the communication light projecting unit at a position where it is not disturbed by the cooking container placed on the top plate, it is possible to reduce the probability that the optical signal is blocked.

According to the fifth aspect of the invention, there are three heating means below the top plate, and two of these heating means are:
The respective centers are arranged so as to be in front of the central portion of the top plate in the front-rear direction, and the remaining one heating means has the center thereof located rearward of the central portion of the top plate in the front-rear direction. And the communication light-projecting portion is located behind the central portion of the top plate, and
It is characterized in that it is arranged on the side of the heating means existing at the rear.

When there are three heating means, a plurality of cooking containers are often placed on the top plate, and there is a high probability that an optical signal emitted from the communication light projecting unit will be blocked by the cooking containers. Become. However, in this case, two of the three heating means are arranged on the front side of the top plate, and the remaining one heating means is arranged on the rear side, whereas the communication light projecting section is arranged on the top plate. Of the optical signal emitted from the communication light-projecting section, since it is arranged at the rear of the central portion of, and on the side of the heating means existing in the rear, and is arranged at a position avoiding the heating means, The probability of being blocked by the cooking container can be reduced.

According to a sixth aspect of the present invention, in the above-described second aspect, a plurality of communication light projecting portions are present below the top plate, and at least one of the communication light projecting portions is the top plate. It is characterized in that it is arranged in front of the central portion in the front-back direction. According to this, since the communication light projecting portions are provided on the rear side and the front side of the top plate, respectively, the reliability of communication can be further improved. Further, even if the relative position with respect to the communication light receiving portion that receives the optical signal is deviated, the probability of transmission becomes high.

The invention of claim 7 is characterized in that a plurality of communication light projecting portions are present below the top plate, and the plurality of communication light projecting portions are electrically connected in series. According to this, compared with the case where a plurality of communication light projecting units are connected in parallel, the circuit configuration can be simplified and power consumption can be suppressed.

In order to achieve the above-mentioned second object, the heating and cooking system according to the invention of claim 8 has a top plate on which a cooking container such as a pot is placed, and below the top plate. A heating cooker provided with a heating means for cooking and a communication light projecting part which is arranged below the top plate and emits an optical signal upward through the top plate, and above the heating cooker. And a ventilation device provided with the ventilation device main body and a communication light-receiving unit which is provided in the ventilation device main body and receives an optical signal emitted from the communication light-projecting unit. And

According to this, like the heating cooker according to the first aspect of the invention, it is possible to reduce the probability that the optical signal emitted from the communication light projecting unit is blocked by the body of the user or the cooking container, and the communication is performed. Will be able to improve the reliability of.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an external view of the heating and cooking system of the present invention. In FIG. 1, the heating and cooking system is a built-in type cooking device 1 incorporated in a cabinet 11 of a kitchen.
2 and a range hood fan 13 as a ventilation device installed above the heating cooker 12. The upper surface of the cabinet 11 is a worktop 14.

First, the heating cooker 12 will be described.
As shown in FIG. 6, the main body case 15 of the heating cooker 12 is incorporated in the upper part of the cabinet 11, and the upper case 16 is mounted on the upper part of the main body case 15. The upper surface part of the upper case 16 has a rectangular plate shape. It is covered with a top plate 17 having a shape. This top plate 17
It is made of heat-resistant tempered glass having a light transmittance of about 80% of infrared rays having a wavelength of 950 nm, and is supported by a rectangular support frame 18 mounted on the worktop 14. The top plate 17 has a transmittance of about 50% or more in the visible light wavelength region (760 nm or less).

Inside the upper case 16, as shown in FIG. 5, a heating coil 20 for the left IH, a heating coil 21 for the right IH, and a DC current are supplied to the nichrome wire, which respectively constitute heating means for cooking. There is provided a central heater 22, which is a radiant heater that generates heat when energized, so that both heating coils 20 and 21 and the central heater 22 are provided below the top plate 17.
The left and right heating coils 20 and 21 are arranged so that their centers O1 and O2 are located in front of the center line C (central portion) of the top plate 17 in the front-rear direction. Is arranged such that the center O3 thereof is behind the center line C.

In the upper case 16, two printed circuit boards 2 are provided in front of the left and right heating coils 20 and 21.
3, 24 are provided. Among them, on the left printed circuit board 23, a left LED group 26 composed of a large number of display LEDs 25 is located in front of the left heating coil 20.
Are arranged in an arc shape along the outer periphery of the heating coil 20. Further, on the right printed circuit board 24, a right LED group 27, which is located in front of the right heating coil 21 and is composed of a large number of display LEDs 25, is arranged on the heating coil 2
1 is arranged in an arc shape along the outer peripheral portion of 1, and a central LED group 28 including a large number of display LEDs 25 is arranged in front of the central heater 22. Display LED 25 of each LED group 26, 27, 28
Are respectively held by holders 25a. Further, each LED group 26, 27, 28 is adapted to display the heating power of the corresponding heating coil 20, 21, central heater 22, and when the heating power of the corresponding heating coil 20, 21, central heater 22 is strong. The number of lit display LEDs 25 is large, and the number of lit display LEDs 25 is small when the heating power is weak.

Further, in the upper case 16, small rectangular printed boards 29 and 30 are provided in the left back part and the right back part.
Is provided. And both of these printed circuit boards 2
9 and 30, and both of the printed boards 23 and 24 on the front side,
Infrared LEDs 31 to 34 that emit infrared light signals, which respectively constitute a communication light projecting unit, are provided (FIG.
(See FIG. 7). Therefore, in this case, the four infrared LEDs 31 to 34 are arranged below the top plate 17, and the two infrared LEDs 31 and 32 on the rear side among these are arranged.
Are arranged behind the center line C (center portion) in the front-rear direction of the top plate 17 and on the left side and the right side of the central heater 22. Further, the two front infrared LEDs 33,
Reference numerals 34 are arranged in front of the center line C in the front-rear direction of the top plate 17 in the front left portion and the front right portion. Each of the infrared LEDs 31 to 34 transmits an infrared light signal having a wavelength of 950 nm through the top plate 17 upward,
The light is emitted toward the photodiode 35 (see FIG. 1) that constitutes the communication light-receiving section on the range hood fan 13 side.

In this case, both printed circuit boards 2 described above are used.
As shown in FIG. 8, 3, 24, 29, and 30 are in a state of being connected to each other through a thin connecting portion 36 in a state before being incorporated in the upper case 16, and at the time of soldering. In the above case, they are integrated, and when assembled in the upper case 16, they are separated by cutting at the connecting portion 36.

In the main body case 15 below the upper case 16, the inverter circuit 3 for the heating coils 20 and 21 is provided.
7 (see FIG. 6) is provided and is located behind the inverter circuit 37, and the inverter circuit 3
A cooling blower 38 for cooling 7 is provided.

As shown in FIG.
As shown in FIG. 5, the circular pan placing portions 39, 39 are respectively provided in correspondence with the heating coils 20, 21, and the central heater 22.
40 and 41 are displayed, and each LED group 26,
The thermal power display portions 42, 43, 44 are displayed corresponding to 27, 28. An exhaust port 45 is provided behind the top plate 17.

1 and 3, a roaster 46 is provided on the left side of the front portion of the main body case 14. Inside the roaster 46, for example, a sheath heater (not shown) is provided as a heating means. This roaster 4
The air in 6 is discharged from the exhaust port 45.

An operation panel section 50 is provided on the right side of the front portion of the main body case 14. This operation panel unit 50 is provided with one power switch 51, four dials 52 to 55 for adjusting heat power, and a kangaroo type operation unit 56. The four dials 52 to 55 are, in order from the left, the left IH dial 52, the central heater dial 53, the roaster dial 54, and the right IH dial 5.
It is 5. Of these, for the left IH, for the central heater,
And the dials 52, 53, 55 for the right IH are for turning on / off the corresponding heating coils 20, 21, and the central heater 22.
It is designed to turn off and adjust the firepower. The on / off operation is performed by pushing the dials 52, 53, 55. Fire power adjustment is dial 5 when turned on
It is performed by rotating 2, 53, 55, and the heating power is increased as it is rotated clockwise, and accordingly, the heating coils 20, 21, and the LED groups 26 to 28 corresponding to the central heater 22. The number of lights of the display LED 25 is increased.

The roaster dial 54 is used only for turning on / off the heater of the roaster 46, and fine heating power adjustment is performed in the kangaroo type operating section 56. The diameters of the left IH dial 52 and the right IH dial 55 are set to be larger than those of the other dials in order to give different operability to each dial.

In the closed state, the kangaroo type operating section 56 is housed on the side of the main body case 15 as shown in FIGS. Then, in this state, the kangaroo type operation unit 5
When the upper part of 6 is pushed, the kangaroo type operation part 56 as shown in FIG. 4 appears while rotating to the front side with its lower end as a fulcrum, and operation is possible. Note that when the opened kangaroo type operation unit 56 is closed, it is rotated backward and pushed, contrary to the case of opening.

In FIG. 4 showing the kangaroo type operating section 56, the left heating coil 2 is arranged in order from the left on the upper side in FIG.
0, the heater of the roaster 46, the display units 57 to 59 for setting the heating time of the right heating heater 21, and the operation unit 60.
Is provided. Further, on the lower side in FIG. 4, in order from the left, a fan operation unit 61 for manually operating the range hood fan 13, a roaster operation unit 62 for setting the cooking method of the roaster 46, and a right side. A tempura setting unit 63 for setting the IH to the tempura cooking is provided. If the right IH is set to tempura cooking,
The heat power range that can be adjusted by the right IH dial 55 is set to a predetermined range (for example, the oil temperature is 140 ° C. to 200 ° C.).

Next, the range hood fan 13 will be described. In the range hood fan 13, an exhaust fan including a fan motor 66 (see FIG. 9) and a blower fan (not shown) rotatably driven by the fan motor 66 inside the hood body 65 that constitutes the ventilation device body. A device is provided. On the lower right of the front of the hood body 65,
An operation portion 67 for manually operating the fan device is provided, and the photodiode 35 is provided downward at the center portion in the left-right direction of the lower end portion of the front portion of the hood body 65. The hood body 65 is also provided with an illumination lamp (not shown) that illuminates the lower side.

FIG. 9 schematically shows the electrical configuration of the heating cooker 12 and range hood fan 13 described above. First, the electrical configuration of the heating cooker 12 will be described. A pair of bus bars 71a, 71 connected to the commercial power source 70
One bus bar 71b of b is connected to the bus bar 71c via the power switch 51.
When 1 is turned on, the AC voltage of the commercial power source 70 is applied to each electronic circuit of the heating cooker 12.

The central heater circuit 72 is an electromagnetic relay 73.
And the central heater 22 are connected in series, and the series circuit is formed between the bus bars 71a and 71c. Switching control of the electromagnetic relay 73 is performed by an energization control circuit 74. Then, by controlling the energization time of the alternating current flowing through the central heater 22 with the electromagnetic relay 73, the heating power of the central heater 22 is controlled. The roaster circuit 75 is
The central heater circuit 72 has a circuit configuration equivalent to that of the central heater circuit 72, and a description thereof will be omitted.

The left IH circuit 76 is formed as follows. The AC input terminal of the rectifier bridge circuit 77 is a bus bar 7.
1a and 71c, and their DC output terminals are connected to a series circuit including a coil 78 and a smoothing capacitor 79. The heating coil 20 and the resonance capacitor 80 are provided at a common connection point of the coil 78 and the smoothing capacitor 79.
One end of a resonance circuit 81 composed of a parallel circuit is connected to the other end, and the other end is connected to the collector of the IGBT 82 constituting the switching means. The IGBT82 emitter is
It is connected to a common connection point of the smoothing capacitor 79 and the rectifying bridge circuit 77. A flywheel diode 83 is connected between the emitter and collector of the IGBT 82 so that the anode is on the emitter side.

The gate of the IGBT 82 is connected to the energization control circuit 74 via the drive circuit 84, and the IGBT 8
In No. 2, switching control is performed by the energization control circuit 74. Then, the heating frequency of the left heating coil 20 is controlled by matching the switching frequency of the IGBT 82 with the resonance frequency of the resonance circuit 81 and controlling the ON time for each cycle to control the amount of high-frequency current flowing to the resonance circuit 81. It is supposed to be done.

Further, the resonance circuit 81 is provided with an overcurrent detection sensor 85 for detecting an overcurrent flowing therein, and the detection signal thereof is output to the energization control circuit 74. Then, in the energization control circuit 74, when an overcurrent is detected, processing for instantaneously stopping the energization control is performed. The central heater circuit 72 and the roaster circuit 75 are also provided with an overcurrent detection sensor similar to the above although not shown, and the same processing is performed when an overcurrent is detected.

The rectifying bridge circuit 77, the coil 78, the smoothing capacitor 79, the resonance circuit 81, the IG
The BT 82, the flywheel diode 83, and the drive circuit 84 form a left IH circuit 76. Also,
The right IH circuit 86 has a circuit configuration equivalent to that of the left IH circuit 76, and therefore description thereof is omitted.

The energization control circuit 74 is mainly composed of a microcomputer, and controls the electric operation of the entire heating cooker 12 in accordance with a cooker control program provided in advance. In addition, the energization control circuit 74 has an air volume setting function 87 formed by a cooker control program. A constant voltage circuit 88 that generates a predetermined DC voltage from the AC voltage of the commercial power source 70 is connected to the bus lines 71a and 71c, and the energization control circuit 7 is connected.
4 operates as a drive power source using the DC voltage output from the constant voltage circuit 88.

The energization control circuit 74 includes an operation panel section 50.
Each dial and each switch (only shown as the operation panel unit 50 in FIG. 9) arranged in the above, each switch of the fan operation unit 62, and the infrared LED drive circuit 89 are connected. The infrared LED drive circuit 89 is connected to one end of a series circuit in which the four infrared LEDs 31 to 34 are connected in series. The other end of the series circuit of the four infrared LEDs 31 to 34 is connected to the collector of the transistor 91 via the resistor 90. The emitter of the transistor 91 is grounded, and the base is the infrared LED drive circuit 89.
It is connected to the. The infrared LED drive circuit 89 has a function of generating a drive signal based on a command output from the energization control circuit 74 and causing each of the infrared LEDs 31 to 34 to emit light based on the drive signal (a signal having a carrier frequency of about 38 kHz). is doing. As a result, each infrared LED 31
˜34 will emit infrared light signals.

Next, the electrical configuration of the range hood fan 13 will be described. The photodiode 35 that receives an infrared light signal is connected to the receiving circuit 95. The receiving circuit 95 is connected to the control circuit 96, and the receiving circuit 9
The signal detected in 5 is output to the control circuit 96. The control circuit 96 is mainly composed of a microcomputer, and controls the electric operation of the entire range hood fan 13 such as the fan motor 66 and the illumination lamp according to a control program provided in advance.

Next, the operation of the above configuration will be described. When the heating cooker 12 is used, the user needs to turn on the power switch 51.
Is turned on. Among the heating means, the left IH (heating coil 20), the right IH (heating coil 21),
And one of the central heaters 22, for example, the left IH is used, the pan mounting portion 39 on the top plate 17
~ 41 of the pan placing portion 39 corresponding to the heating coil 20
With the cooking container 97 (see FIG. 9) such as a pan placed on the operation panel 50, the left IH dial 52 is operated on the operation panel unit 50. Then, the energization control circuit 74 causes the drive circuit 84 to
The heating coil 20 is energized and the left LED group 26 is lit by switching control of the IGBT 82 via. The heating coil 20 is controlled to have the heating power set by the left IH dial 52,
Further, the number of left LED groups 26 to be lit is equal to the number of heating coils 20.
It is controlled to correspond to the firepower of. The energization control circuit 74 also controls the lighting of the infrared LEDs 31 to 34 via the infrared LED drive circuit 89.

When the infrared LEDs 31 to 34 emit light,
Infrared light signals from the infrared LEDs 31 to 34 pass through the top plate 17 and the range hood fan 13 above.
It is emitted toward the photodiode 35 in. At this time, since each infrared LED 31-34 emits an optical signal upward through the top plate 17, when the user operates the dial of the operation panel unit 50, the probability of interrupting the optical signal is low. Also 4 infrared LEDs
Since 31 to 34 are arranged at four places avoiding the pot placing portions 39 to 41, the light signals of the infrared LEDs 31 to 34 are the cooking vessels 9 placed on the top plate 17.
The probability of being cut off at 7 is also low.

When the optical signal transmitted from the infrared LEDs 31 to 34 is received by the photodiode 35, the control circuit 96 in the range hood fan 13 drives and controls the fan motor 66 based on the received signal. At this time, the control circuit 96, according to the heating power of the heating coil 20,
The number of revolutions of the fan motor 66 is controlled to control the exhaust air volume.

When the right IH and the central heater are used, the same operation as in the case of the left IH is performed. Further, when the roaster 46 is used, it is not necessary to place the cooking container on the top plate 17, but as in the case of the left IH, the infrared LEDs 31 to 34 emit light to emit an optical signal,
Based on this, the fan motor 6 of the range hood fan 13
6 is driven and controlled. Furthermore, left IH, right I
When two or more heating means of the H, the central heater 22, and the loin 46 are used, the rotation speed of the fan motor 66 of the range hood fan 13 is controlled according to the total output of them.

Even when the heating means of the heating cooker 12 is not used, if the fan operation section 62 of the operation panel section 50 is operated, the infrared LE is obtained as described above.
D31 to 34 emit light to emit an optical signal, and the fan motor 66 of the range hood fan 13 is driven and controlled based on this. In addition, the range hood fan 13
By operating the operation unit 67 provided therein, the fan motor 66 is driven and controlled regardless of the heating cooker 12.

According to the above-mentioned embodiment, the following effects can be obtained. First, the infrared LEDs 31 to 34, which constitute the communication light projecting section, are arranged below the top plate 17, and the optical signals emitted from the infrared LEDs 31 to 34 pass through the top plate 17 and the photodiode 35 above. Sent to. At this time,
The probability that a part of the user's body is located above the top plate 17 is low, and thus the probability that the optical signals emitted from the infrared LEDs 31 to 34 are blocked by a part of the user's body is low. Further, since the cooking vessel 97 placed on the top plate 17 is usually placed on the pot placing sections 39 to 41, which is a place corresponding to the heating means, the infrared LE is used.
By arranging D31 to 34 at a position where they are not disturbed by the cooking container 97 placed on the top plate 17, the optical signals emitted from the infrared LEDs 31 to 34 are less likely to be blocked by the cooking container 97 or the like. it can. Therefore, it is possible to reduce the probability that the optical signals emitted from the infrared LEDs 31 to 34 are blocked and improve the reliability of communication. Further, since the infrared LEDs 31 to 34 are covered with the top plate 17, it is not necessary to take them in and out.

Here, in the heating cooker 12, two heating coils 20 and 21 are arranged on the front side of the top plate 17 and one central heater 22 is arranged on the rear side. Since it is of the mouth type, a plurality of cooking containers are often placed on the top plate 17, and the probability that the optical signals emitted from the infrared LEDs 31 to 34 are blocked by the cooking container or the like also increases.

In this respect, the infrared LE is used in this embodiment.
Since four D31 to D34 are arranged, even if the optical signal emitted from one of the infrared LEDs is blocked, the optical signal emitted from the other infrared LEDs is effectively transmitted. Therefore, the reliability of communication can be further improved. Further, even if the relative position with respect to the photodiode 35 that receives the optical signal is deviated, the probability of transmission becomes high.

Moreover, in this case, especially two infrared LEDs
31 and 32 are arranged behind the central portion of the top plate 17 and on both the left and right sides of the central heater 22 on the rear side, and are arranged at positions avoiding the pan placing portions 39 to 41. Therefore, these two infrared LEDs 31, 32
It is possible to further reduce the probability that the optical signal emitted from the device will be blocked by the body of the user or the cooking container. Further, since the infrared LEDs are arranged not only on the rear side of the top plate 17 but also on the left and right side portions on the front side of the top plate 17, two infrared LEDs 33 and 34 are arranged, so that the reliability of communication can be further improved and Even if the relative position with respect to the photodiode 35 is deviated, the probability of transmission can be increased.

In general, the infrared LED has a lower heat resistance temperature than that of an ordinary semiconductor, and a relatively large current needs to be passed in order to reliably send a signal, and the infrared LED itself generates a large amount of heat. Therefore, the infrared LED cannot be used in a state where the ambient temperature is high. Unlike induction heater heating, electromagnetic induction heating is a heating method in which the cooking container (pot) itself does not generate heat, but the ambient temperature of the heating coil does not rise so much. is there. In the present embodiment, taking advantage of such a characteristic that the ambient temperature of the heating coils 20 and 21 for electromagnetic induction heating does not rise so much, and by disposing them near the heating coils 20 and 21 below the top plate 17, communication of It has become possible to improve reliability.

Further, in the above-described embodiment, the four infrared LEDs 31 to 34 are electrically connected in series, so that the circuit configuration can be simplified and the power consumption can be reduced as compared with the case of connecting them in parallel. There is an advantage that it can be suppressed.

Further, of the four infrared LEDs 31 to 34, the two front infrared LEDs 333 and 34 are mounted on the printed circuit boards 23 and 24 on which the left LED group 26 and the right LED group 27 for displaying thermal power are mounted. Since this is done, the configuration can be simplified compared to the case where a printed circuit board dedicated to communication is used. In addition, these printed circuit boards 23, 24
The printed circuit boards 29 and 30 for communication on the rear side are connected to each other via the connecting portion 36 before they are separated from each other and can be handled integrally, so that soldering or the like is facilitated, and The cost can also be reduced.

The present invention is not limited to the above embodiments, but can be modified or expanded as follows. In the above embodiment, the infrared LEDs 31 to 34
Although an example in which four of the infrared LEDs are arranged below the top plate 17 is shown, the number of infrared LEDs is not limited to four, and may be one or two.

As the heating cooker 12, a built-in type incorporated in the cabinet 11 of the kitchen is illustrated, but a stationary type placed on the worktop 14 or the like may be used. The heating cooker 12 may not be provided with the roaster 46, and the upper heating means is not limited to the three-mouth type, but the two-arm or one-arm.
It may be a mouth type. The ventilation device is not limited to the range hood fan 13 and may be a ventilation fan installed on a wall or the like.

[0056]

As is clear from the above description, according to the heating cooker of the present invention, the communication light projecting portion is arranged below the top plate, and the light emitted from the communication light projecting portion is arranged. Since the signal is transmitted upward through the top plate, the probability that the optical signal is blocked by a part of the user's body or a cooking container placed on the top plate. It is possible to obtain an excellent effect that it is possible to reduce the number of communications and improve the reliability of communication.

Also, in the heating and cooking system of the present invention, the same effects as the above can be obtained.

[Brief description of drawings]

FIG. 1 is an external perspective view of a heating and cooking system showing an embodiment of the present invention.

FIG. 2 is a plan view of the heating cooker.

FIG. 3 is a front view of the heating cooker.

FIG. 4 is a plan view of a kangaroo type operation unit.

FIG. 5 is a plan view of the heating cooker with the top plate removed.

FIG. 6 is a vertical side view of the heating cooker.

FIG. 7 is an enlarged sectional view of a main part.

FIG. 8 is a plan view showing a state before separating the printed circuit board.

FIG. 9 is an electric circuit configuration diagram of the heating and cooking system.

FIG. 10 is a vertical sectional side view showing a conventional example.

[Explanation of symbols]

In the drawings, 12 is a heating cooker, 13 is a range hood fan (ventilator), 17 is a top plate, 20 and 21 are heating coils (heating means), 22 is a central heater (heating means), 31, 32, 33, 34 is an infrared LED (communication light emitting unit), 35 is a photodiode (communication light receiving unit),
Reference numerals 39, 40 and 41 are pot mounting portions, 46 is a roaster, 56 is a kangaroo type operation portion, and 65 is a hood body (ventilator main body).

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) H05B 6/12 305 H05B 6/12 305 F term (reference) 3K051 AB02 AD39 CD41 3L056 BD07 BE01 BF02 3L058 BH10 BK09 3L061 BA01 BA03 3L087 AA03 BA04 CA02 CA12 DA17 DA24

Claims (8)

[Claims] 1. A top plate on which a cooking container such as a pot is placed, a heating means for cooking arranged below the top plate, and a heating means arranged below the top plate, through which the top plate is passed. A heating cooker, comprising: a communication light projecting unit that emits an optical signal upward. 2. The heating means is arranged such that the center of the heating means is in front of the center portion of the top plate in the front-rear direction, and the communication light-projecting portion is disposed from the center portion of the top plate in the front-rear direction. The heating cooker according to claim 1, wherein the heating cooker is also arranged rearward. 3. The heating cooker according to claim 1, wherein a plurality of the communication light projecting portions are arranged below the top plate. 4. A plurality of the heating means are arranged below the top plate.
The heating cooker according to any one of 1 to 3. 5. The three heating means are provided below the top plate, and the two heating means are arranged such that the centers of the two heating means are located in front of the front-back center portion of the top plate. And the remaining one heating means is
The center is arranged so as to be rearward of the front-rear center portion of the top plate, and the communication light-projecting portion is rearward of the center portion of the top plate, and of the heating means existing rearward. The cooking device according to claim 1, wherein the cooking device is arranged laterally. 6. A plurality of the communication light projecting portions are provided below the top plate, and at least one of the communication light projecting portions is arranged in front of a front-back central portion of the top plate. The cooking device according to claim 2, wherein the heating cooker is provided. 7. A plurality of the communication light projecting portions are provided below the top plate, and the plurality of communication light projecting portions are electrically connected in series. Heating cooker. 8. A top plate on which a cooking container such as a pot is placed, a heating means for cooking arranged below this top plate, and a heating means arranged below the top plate for passing through the top plate. A heating cooker including a communication light projecting unit that emits an optical signal upward, a ventilator main body disposed above the heating cooker, and the communication projector provided on the ventilator main body. A heating and cooking system, comprising: a ventilation device including a communication light receiving unit that receives an optical signal emitted from the light unit.