JP2003217814A - Electromagnetic induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat cooker, capable of efficiently cooling a plurality of electromagnetic induction coils and a control board with cooling air of one motor-driven blower, reducing the size of the body and decreasing the noise as much as possible. <P>SOLUTION: This electromagnetic induction heating cooker 1 includes a body case 4 provided with a suction port 2, an exhaust port 3a, b, a plurality of electromagnetic induction coils 5a, b built in the body case 4, control boards 6a, 6b for controlling the output of the electromagnetic induction coils 5a, b, the motor-driven blower 13 for generating an air current in the body inside, and an air duct switching guide plate 18 provided with a fan guide 14 for guiding an air current and capable of switching the air current to be guided to one of the plurality of electromagnetic induction coils 5a, b or one or the plurality of the control boards 6a, b. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic induction heating cooker, and more particularly to an improvement of a cooling mechanism for cooling a high temperature member provided inside a main body case.

[0002]

2. Description of the Related Art An electromagnetic induction heating cooker is provided with a control board including an electromagnetic induction coil for heating an object to be heated by electromagnetic induction inside a main body case and a switching element for controlling the output of the electromagnetic induction coil. I was prepared. Each component of these electromagnetic induction coil and control board generates heat during operation, resulting in high temperature. Therefore, a heat radiating plate is provided on the control board or an air flow is generated by an electric blower, and these heat generating parts are arranged in this air flow. It had a configuration such as.

13 and 14 show Japanese Patent Laid-Open No. 11-339.
A general conventional electromagnetic induction heating cooker disclosed in Japanese Patent No. 946 is described. 13 is a schematic perspective view of a conventional electromagnetic induction heating cooker, and FIG. 14 is a schematic sectional view taken along line BB of the conventional electromagnetic induction heating cooker in FIG.

An electromagnetic induction heating cooker 100 shown in FIG.
Is an electromagnetic induction coil 102a inside the main body case 101,
102b, a control board 103a that controls the output of the electromagnetic induction coil 102a, and a control board 103b that controls the output of the electromagnetic induction coil 102b. These electromagnetic induction coils 102a and 102b operate by operating the operation unit 104 provided on the front surface of the main body case, and heat the object to be heated placed on the top surface by electromagnetic induction heating. At this time, the electromagnetic induction coils 102a and 102b and the control boards 103a and 103b generate heat during the heating operation of the object to be heated.

Such electromagnetic induction coils 102a, 10
2b and the control boards 103a, 103b are provided with electric blowers 105a, 105b at the back of the electromagnetic induction coils 102a, 102b and a fan guide 106 for roughly guiding the airflow generated by the electric blowers 105a, 105b. It was being done.

With this structure, as shown in FIG. 14, the main body case 10 is rotated by the rotation of the electric blower 105b.
The outside air is introduced from the intake port 107 provided at the back of the top surface of No. 1, and the air flow inside the main body case 101 generated by the electric blower 105b efficiently passes through the electromagnetic induction coil 102b and the control board 103b by the fan guide 106. After being cooled, it is discharged to the outside from an exhaust port 108 provided on the bottom surface of the main body case 101 on which the operation unit 104 is provided. In this way, the heat generating portion is cooled to prevent the inside of the main body from becoming highly heated.

[0007]

However, in the above-mentioned conventional electromagnetic induction heating cooker, each electromagnetic induction coil 102a,
Each of 102b has electric blowers 105a and 105b, which causes various problems such as an increase in size and weight of the main body, and an increase in the number of parts that complicates assembly.

On the other hand, there is also an electromagnetic induction heating cooker having one electric blower. However, the air flow inside the main body generated by one electric blower is controlled by a fan guide to form a plurality of electromagnetic induction coils and control boards. Since it is configured to be guided to, for example, even when only one of the plurality of electromagnetic induction coils are operating, the airflow is also guided to the other electromagnetic induction coils and the control board that are not operating,
The cooling efficiency was poor. In addition, since multiple electric heat blowers try to cool multiple heat-generating parts, the output of the electric blower is set to a large value even when only one electromagnetic induction coil is operating, and the electric blower is operating while the cooker is operating. Such as the sound of driving, the intake of airflow, and the sound accompanying exhaust,
There was a problem that the noise increased.

The present invention has been made in view of the above problems, and a heating cooker having a plurality of electromagnetic induction coils, a control board, and the like is efficiently cooled by the cooling air of a single electric blower, so that the main body can be made compact. It is an object of the present invention to provide an electromagnetic induction heating cooker that can be reduced in weight. Another object is to provide an electromagnetic induction heating cooker capable of suppressing noise as much as possible while cooling with one electric blower.

[0010]

To achieve the above object, an electromagnetic induction heating cooker according to the present invention is provided with an intake port for introducing outside air from the outside and an exhaust port for discharging the inside air to the outside. Body case, a plurality of electromagnetic induction coils for heating an object to be heated by electromagnetic induction built in the main body case, a control board for controlling outputs of the plurality of electromagnetic induction coils, and an air flow inside the body. And a fan guide that guides the airflow inside the main body, and can switch the airflow to guide the airflow to any one or more of the plurality of electromagnetic induction coils. A guide plate is provided.

The electromagnetic induction heating cooker according to the present invention includes a main body case provided with an intake port for introducing outside air from the outside and an exhaust port for discharging the inside air to the outside.
A plurality of electromagnetic induction coils for heating an object to be heated by electromagnetic induction built in the main body case; a control board provided in each of the plurality of electromagnetic induction coils to control an output of the electromagnetic induction coil; An air blower that includes an electric blower that generates an air flow inside and a fan guide that guides the air flow inside the main body, and that can switch the air flow to guide one or more of the control boards A guide plate is provided.

In the electromagnetic induction heating cooker according to the present invention, the air passage switching guide plate is operated at a predetermined angle according to the energization state of the electromagnetic induction coil.

In the electromagnetic induction heating cooker according to the present invention, the output of the electric blower is changed according to the energization state of the electromagnetic induction coil.

Further, the electromagnetic induction heating cooker according to the present invention is provided with a plurality of the air passage switching guide plates.

Further, in the electromagnetic induction heating cooker according to the present invention, a top plate for mounting an object to be heated is mounted on an upper surface of the main body case, and the plurality of electromagnetic induction coils are arranged to face the top plate. The airflow is configured so that at least a part of the airflow passes between the top plate and the electromagnetic induction coil.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to one embodiment of the electromagnetic induction heating cooker of the present invention.

Embodiment 1. FIG. 1 is a perspective perspective view showing a schematic configuration of an electromagnetic induction heating cooker according to an embodiment of the present invention. The electromagnetic induction heating cooker 1 shown in the figure includes an intake port 2 for introducing outside air from the outside, and a main body case 4 provided with exhaust ports 3a, 3b for discharging the inside air to the outside.

The body case 4 has a plurality of electromagnetic induction coils 5 for heating an object to be heated by electromagnetic induction.
a, 5b, and control boards 6a, 6b, which are composed of switching elements for controlling the outputs of the plurality of electromagnetic induction coils 5a, 5b, heat radiating plates, etc., are built in.

A roaster 7 for cooking mainly fish is provided on the lower left side of the front surface of the main body case 4, and a roaster exhaust port 8 for exhausting smoke from the inside of the roaster 7 is provided at the back of the main body. Is provided. Further, an operation unit 9 for operating the heating output of the electromagnetic induction coils 5a and 5b of the electromagnetic induction heating cooker 1 and the roaster 7 is provided on the lower right side of the front surface of the main body case 4.

FIG. 2 shows the electromagnetic induction heating cooker A shown in FIG.
-A sectional drawing is described. In the figure, the same components as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. As shown in FIG. 2, a top plate 10 made of a ceramic material is provided on the top surface of the electromagnetic induction heating cooker 1. The electromagnetic induction coils 5a, (5b (hereinafter, not shown in parentheses)) are the coil supporting base 11a,
It is supported by (11b) and is arranged to face the top plate 10. A filter 12 for preventing dust and the like from entering the inside of the main body case 4 is provided at an intake port 2 and a roaster exhaust port 8 (not shown) provided on the back of the main body.
Is provided.

Inside the main body case 4, an electric blower 13 for generating an air flow inside the main body and a fan guide 14 for guiding the air flow inside the main body generated by the electric blower 13 are provided. The fan guide 14 covers the electric blower 13 and the control boards 6a and 6b, and the airflow generated by the electric blower 13 is generated by the electromagnetic induction coil 5a.
5b and the control boards 6a and 6b, respectively. On the upper surface of the fan guide 14, the airflow generated by the electric blower 13 is connected to the electromagnetic induction coil 5a,
Air outlets 15a and 15b are provided for sending to 5b.

The inside of the main body case 4 is divided into upper and lower parts by a partition plate 16. At the upper part of the main body case 4, there are electromagnetic induction coils 5a, 5b for heating an object to be heated placed on the above-mentioned top plate 10. And control boards 6a and 6b for controlling the output thereof are arranged, and the lower part controls the overall operation of the electromagnetic induction heating cooker 1 such as sending operation information of the operation unit 9 to the control boards 6a and 6b. A control board (not shown) and a roaster 7 are provided for this purpose.

The electromagnetic induction heating cooker 1 having the above-mentioned structure is used for heating the object to be heated by the electromagnetic induction coil 5a.
When 5 or 5b is operated, the electromagnetic induction coils 5a and 5b, the control boards 6a and 6b for controlling the outputs thereof, and the control board for controlling the overall operation of the electromagnetic induction heating cooker 1 generate heat. Therefore, the electric blower 13 described above is operated to take in the outside air from the intake port 2 into the main body case 4 and generate the airflow discharged from the discharge ports 3a and 3b to perform air cooling. Further, in this embodiment, the coil support base 11a,
A large number of ventilation holes 17 are provided in 11b so that the airflow can be passed between the coils to cool the coils better.

In this embodiment, the electromagnetic induction coils 5a and 5b and the control boards 6a and 6b provided in the electromagnetic induction heating cooker 1 by one electric blower 13 are provided in a plurality.
An air passage switching guide plate 18 is provided for better cooling.

FIG. 3 is a schematic perspective view of the inside of the fan guide 14 for explaining the operation of the air passage switching guide plate 18. As shown in the figure, inside the fan guide 14, the propeller portion 13a of the electric blower 13 for generating the airflow inside the main body case 4 is built in as described above, and the airflow inlet is provided below the propeller portion 13a. It is provided like a bell house. When the propeller portion 13a is rotated by the operation of the electric blower 13, the outside air sucked from the intake port 2 passes through the airflow inlet provided at the lower part of the propeller portion 13a and is sucked into the fan guide 14. Then, the airflow is sent from the airflow blowing portion 19 of the fan guide 14 to each heat generating portion. In the present embodiment, the airflow blowing section 19 is provided with the above-mentioned air passage switching guide plate 18.

For example, when only the electromagnetic induction coil 5a is operated, the air passage switching guide plate 18 is switched to the position a so that the air passage switching guide plate 18 and the wind direction plate 20 provided behind the air passage switching guide plate 18 together with the electromagnetic induction. It may be possible to send an air stream to the operating control board 6a to control the coil 5a.

When only the electromagnetic induction coil 5b is operated, the electromagnetic induction coil 5b is operated together with the wind direction plate 20 provided at the rear of the air path switching guide plate 18 by switching to the position c. The airflow can be sent to the control board 6b therein.

Further, when both the electromagnetic induction coils 5a and 5b are being operated, the position is changed to the position a, so that the wind direction plate 20 provided at the rear of the air passage switching guide plate 18 and
It is possible to send an air flow to both the control board 6a that is operating to control the electromagnetic induction coil 5a and the control board 6b that is operating to control the electromagnetic induction coil 5b.

The airflow for cooling the control boards 6a and 6b is blown out by the air outlets 21 provided on the left and right side surfaces of the fan guide 14.
It is discharged into the main body case 4 from a and 21b, and is discharged from the discharge ports 3a and 3b, respectively.

In this way, the electromagnetic induction heating of the present embodiment is provided by the structure in which the air passage switching guide plate 18 that can be switched so as to guide one or more of the control boards 6a and 6b at the same time is provided. The cooker 1 can cool the control boards 6a and 6b in operation preferentially and favorably.

As shown in FIG. 1, air outlets 15a and 15b for delivering airflow to the electromagnetic induction coils 5a and 5b are provided above the fan guide 14, and for example, only the electromagnetic induction coil 5a is provided. When the air passage switching guide plate 18 is switched to the position a while operating, the airflow is sent from the outlet 15a to the electromagnetic induction coil 5a, and when only the electromagnetic induction coil 5b is operated, the air passage is operated. When the switching guide plate 18 is switched to the position c, the airflow is sent to the electromagnetic induction coil 5b from the air outlet 15b.

Further, when both the electromagnetic induction coils 5a and 5b are operated, the air passage switching guide plate 18 is switched to the position a so that the airflow is sent out from the air outlets 15a and 15b, and the electromagnetic induction coils Airflow is sent to both 5a and the electromagnetic induction coil 5b, and it becomes possible to perform air cooling. The airflow obtained by air-cooling the electromagnetic induction coils 5a and 5b is discharged through the outlets 3a and 3b provided on the left and right side surfaces of the main body case 4.
Will be discharged respectively.

In this way, the air flow is generated by a plurality of electromagnetic induction coils 5.
The electromagnetic induction heating cooker 1 according to the present embodiment has a configuration in which the air passage switching guide plate 18 that can be switched so as to guide any one of a and 5b or a plurality of guides at the same time is provided.
Can cool the electromagnetic induction coils 5a and 5b in operation preferentially and satisfactorily.

The air passage switching guide plate 18 in this embodiment
The structure of is shown in FIG. As shown in the figure, the air passage switching guide plate 18 in this embodiment is configured to be operated by an electric motor 22. An air passage switching guide plate 18 of the fan guide 14 is provided with an insertion hole 23 through which the rotation shaft 22a of the electric motor 22 is inserted, and the rotation shaft 22a of the electric motor passes through the insertion hole 23 and the air passage switching guide plate 18 is inserted. It is inserted and fixed in a fixing hole 24 provided in the rotating shaft 18a. The electric motor 22 is fixed to the fan guide 14 through the screw fixing holes 26a and 26b by the screws 25a and 25b. Further, the partition plate 16 is also provided with a bearing hole 27 for the rotating shaft 18a of the air passage switching guide plate at a portion where the air passage switching guide plate 18 is installed, and is made thinner than the rotating shaft 18a of the air passage switching guide plate 18. The bearing insertion portion 28 thus formed is inserted into the bearing hole 27 and is rotatably fixed.

In this way, the air passage switching guide plate 18 is operated at a predetermined angle by the electric motor 22 to switch the flow of the air flow, so that the respective position positions described in FIG.
By presetting the rotation angle for arranging the air passage switching guide plate 18 in (a) and (e), it is not necessary to manually position the air passage switching guide plate 18, and the air passage can be switched accurately. Will be possible.

Further, in order to perform better switching of the air flow by the air passage switching guide plate 18, in the present embodiment, the air passage switching assistance such as the wind direction plate 20 shown in FIG. 3 is performed. The member is provided together with the air passage switching guide plate 18. By providing the airflow direction plate 20, the airflow switched by the airflow path switching guide plate 18 is guided to the heat generating portion more favorably.

FIG. 5 shows a wiring diagram of the electromagnetic induction heating cooker according to the present embodiment. It should be noted that the wiring for power supply and control to the roaster 7 included in the electromagnetic induction heating cooker 1 of the present embodiment is omitted in FIG.

In FIG. 5, reference numeral 29 is an outlet for connecting to a power source, 30 is a main switch of the electromagnetic induction heating cooker 1, and the outlet 29 is connected to the power source and the main switch 30 is turned on to cause electromagnetic induction. The heating cooker 1 can be cooked by heating. Reference numeral 31a is a control unit for controlling the overall operation of the electromagnetic induction heating cooker 1, and controls the operation according to the operation information of the operation unit 9.

As shown in FIG. 5, the control section 31a receives the operation information of the operation section 9 and controls the operation information indicating how to operate the outputs of the electromagnetic induction coils 5a and 5b based on the operation information. It is sent to the substrates 6a and 6b. The control boards 6a and 6b are configured to stably operate the electromagnetic induction coils 5a and 5b based on the information sent from the control unit 31a. With such a configuration, the electromagnetic induction coils 5a and 5b can be operated by the operation of the operation unit 9.
Can be operated with any output from 0 (off) to the maximum output.

A feature of this embodiment is that the electric motor 22 for operating the air passage switching guide plate 18 operates the air passage switching guide plate 18 at a predetermined angle according to the energization state of the electromagnetic induction coils 5a, 5b. It was configured as follows.

The operation information from the operation unit 9 supplied from the control unit 31a is also sent to the electric motor control unit 31b. When the electric motor control unit 31b receives the operation information, the operation information is changed according to the operation information. Airway switching guide plate 1
A, so that the optimum position for air cooling is
The electric motor 22 is operated by a predetermined angle for switching to either the position (a) or the position (c).

That is, if the operation information from the operation unit 9 is for operating only the electromagnetic induction coil 5a, the electric motor control unit 31b moves the electromagnetic induction coil 5b so that the air passage switching guide plate 18 is located at the position a. If only one is to be operated, the air passage switching guide plate 18 is located at position c. If both the electromagnetic induction coils 5a and 5b are operated, the air passage switching guide plate 18 is located at position a. The electric motors 22 are respectively operated so as to be arranged.

As described above, according to the electromagnetic induction heating cooker 1 of the present embodiment, the operating electromagnetic induction coil and the control board for controlling the electromagnetic induction coil are linked with the operation information of the operation section 9. Since the air passage switching guide plate 18 is arranged at the optimum position for air cooling, it is not necessary for the user to manage the position of the air passage switching guide plate 18, and the complexity can be eliminated and the wind can be removed. It becomes possible to prevent forgetting to switch the road switching guide plate 18, which greatly improves convenience.

Further, a further characteristic feature of this embodiment is that the output of the electric blower 13 is the electromagnetic induction coil 5a,
5b is configured to be changed according to the energization status.

The operation information from the operation unit 9 supplied from the control unit 31a is also sent to the electric blower control unit 31c. When the electric blower control unit 31c receives the operation information, the operation information is changed to the operation information. Therefore, the electric blower 13 is operated with an optimum output according to the energization state of the electromagnetic induction coils 5a and 5b.

That is, when the operation information from the operating section 9 causes both of the electromagnetic induction coils 5a and 5b to operate and the output thereof is maximum, the electric blower 13 is operated so as to have the maximum output. Based on the reference, the output of the electric blower 13 is adjusted in proportion to the energization status of the electromagnetic induction coils 5a and 5b.

As described above, according to the electromagnetic induction heating cooker 1 of the present embodiment, the electric blower is interlocked with the operation information of the operation section 9 according to the energization status of the current flowing through the electromagnetic induction coil in operation. Since the output of 13 is adjusted, the generation of noise by the electric blower 13 can be suppressed to the minimum necessary level for air-cooling the heat generating portion. Further, since the electric blower 13 does not operate with an unnecessary output, it is possible to save energy.

Further, the output of the electric blower 13 is changed so as to become maximum when both the electromagnetic induction coils 5a and 5b are energized at the maximum output, so that the electric blower 13 is changed.
It is possible to achieve a sufficient air cooling effect by the air flow generated by.

In this embodiment, the control units 31a, 31b, 31c shown in FIG. 5 control the overall operation of the electromagnetic induction heating cooker 1 such as the operation according to the operation information of the operation unit 9. It is provided in a control board (not shown) for performing the operation.

Further, FIG. 6 shows a schematic block diagram of the coil support base 11 for supporting the electromagnetic induction coils 5a and 5b in this embodiment. As shown in the figure, the coil support base 11 according to the present embodiment projects upward from the plane portion and actually holds the electromagnetic induction coils.
In addition, a large number of ventilation holes 17 are provided in the flat surface portion so that the held coil is properly exposed to the air flow.

With the coil support 11 thus constructed, as shown in FIG. 7, the electromagnetic induction coils 5a and 5b are
Coil holding portions 32a to 32d of the coil support bases 11a and 11b.
The coil supporting bases 11a and 11b are held with a slight gap therebetween. And vent holes 17
The airflow generated by the electric blower 13 passes through the gap corresponding to the height of the holding portion 32, as shown by the arrow in the figure, and the cooling efficiency of the electromagnetic induction coils 5a and 5b is improved.

Further, as shown in FIG. 7, in this embodiment, the top plate 10 is mounted on the upper surface of the main body case 4, and the plurality of electromagnetic induction coils 5a and 5b are arranged to face the top plate 10.

A small gap is provided between the top plate 10 and the electromagnetic induction coils 5a and 5b, and at least a part of the air flow generated by the electric blower 13 is at the top as shown by the arrow in the figure. It is configured to pass between the plate 10 and the electromagnetic induction coils 5a and 5b. With such a configuration, the electromagnetic induction coil 5a,
The cooling efficiency of 5b is further improved.

The object 33 to be heated placed on the top plate 10 is heated by the electromagnetic induction of the electromagnetic induction coils 5a and 5b. Therefore, the top plate 10 does not generate heat due to electromagnetic induction, but as the object 33 to be heated is heated, the heat is conducted to the top plate 10 and the top plate 10 also becomes considerably hot. However, at least a part of the air flow generated by the electric blower 13 causes the top plate 10 and the electromagnetic induction coils 5a, 5
By being configured to pass between b, it is possible to cool the top plate 10 which becomes high in temperature as the object 33 to be heated is heated.

Further, in the present embodiment, the object to be heated 3
3 Thermistor 34a (34b) in the vicinity of the place where the electromagnetic induction coil 5a (5b) does not receive electromagnetic induction
Are arranged, and the temperature of the top plate 10 near the place where the object 33 to be heated is placed is monitored. Thermistor 34a
(34b) is arranged at a position where electromagnetic induction by the electromagnetic induction coil 5a (5b) is not received.
4a (34b) is covered with a seal member 35 that cuts the influence of electromagnetic waves so that accurate temperature measurement can be performed.

Then, the temperature detection output of the thermistor 34a (34b) is sent to the electric blower control section 31c in the wiring diagram shown in FIG. 5, and for example, even after the completion of cooking, a predetermined temperature or lower (for example, 75 degrees or less)
The operation of the electric blower 13 is continued until it becomes.

In the wiring diagram shown in FIG. 5, the main switch 30
Even if the power is turned off by the user,
Is connected, the electric blower 13 and the electric motor 22 can be operated, and after the cooking is completed, the main switch 3
Regardless of whether the top plate 10 is turned on or off, the electric blower 1 is used until the temperature of the top plate 10 becomes equal to or lower than a preset predetermined temperature.
Air cooling according to 3 can be performed. Safety is also improved by such a configuration.

In this embodiment, the optimum position for air cooling the operating electromagnetic induction coil is
Although the configuration is such that it is selected from the three positions of (c), the present invention is not limited to this, and the electromagnetic induction coil 5
According to the ratio of the energization status of a and 5b, it is possible to switch to the airflow division position according to the ratio of the energization status of the electromagnetic induction coils 5a and 5b between position A and C so as to divide the airflow into a more appropriate air volume. You may comprise.

Further, in the present embodiment, the temperature of the top plate 10 is monitored by the thermistor 34, but the end of cooking is determined by the end of the operation of the electromagnetic induction coil 5a or 5b, and a timer such as a timer is provided after the end of cooking. The electric blower 13 may be operated for a certain period of time by using the means.

Embodiment 2. FIG. 8 is a perspective perspective view showing an outline of the electromagnetic induction heating cooker according to the second embodiment of the present invention. In the figure, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The electromagnetic induction heating cooker 1 according to the present embodiment has substantially the same structure as that of the first embodiment. The difference from the first embodiment is that in the present embodiment, in addition to the electromagnetic induction coils 5a and 5b for heating an object to be heated, a heater 36 for heating the object to be heated by a heating wire is provided. Since the heater 36 generates heat when heating the object to be heated, this heater 36 also has a mechanism for air cooling.

FIG. 9 shows an electric blower 13 according to this embodiment.
A front schematic perspective view for explaining the flow of the air flow generated by the above is described. As shown in the figure, in the present embodiment, the heater 36 and the plurality of heat generating portions such as the electromagnetic induction coils 5 a and 5 b and the control boards 6 a and 6 b are air-cooled by the single electric blower 13, so that the air blow portion 19 is extended. An air passage 37 is provided, and an air passage switching guide plate 18 is provided in the vicinity of the outlet of the air passage 37 as in the first embodiment. This air passage switching guide plate 18 is
As described in the first embodiment, for example, when only the electromagnetic induction coil 5a is operated, it is switched to the position A, and when only the electromagnetic induction coil 5b is operated, it is switched to the position C. Further electromagnetic induction coil 5
When both a and 5b are operated, the control board is operating to control the electromagnetic induction coil 5a together with the wind direction plate 20 provided behind the air path switching guide plate 18 by switching to the position a. 6a and the control board 6b in operation for controlling the electromagnetic induction coil 5b. The airflow that cools the control boards 6a and 6b is discharged to the inside of the main body case 4 from the outlets 21a and 21b provided on the left and right side surfaces of the fan guide 14, and is discharged from the outlets 3a and 3b, respectively.

As described above, the electromagnetic induction heating according to the present embodiment is provided by the structure in which the air passage switching guide plate 18 that can be switched so as to guide one or more of the control boards 6a and 6b at the same time is provided. The cooker 1 can cool the control boards 6a and 6b in operation preferentially and favorably.

Also in this embodiment, as shown in FIG. 8, the electromagnetic induction coil 5 is provided above the fan guide 14.
Air outlets 15a and 15b for sending airflow to a and 5b
Is provided and, for example, when only the electromagnetic induction coil 5a is operated, when the air passage switching guide plate 18 is switched to the position a, the air flow is sent to the electromagnetic induction coil 5a from the air outlet 15a and the electromagnetic induction When only the coil 5b is operated, when the air passage switching guide plate 18 is switched to the position c, the air flow is sent to the electromagnetic induction coil 5b from the air outlet 15b. Further, when both the electromagnetic induction coils 5a and 5b are operated, the air passage switching guide plate 18 is switched to the position a, so that the airflow is sent out from the air outlet 15a and the air outlet 15b, and the electromagnetic induction coil 5a and the electromagnetic induction coil 5a. Induction coil 5
The airflow is sent to both of b and it becomes possible to perform air cooling.
Then, the airflows obtained by air-cooling the electromagnetic induction coils 5a and 5b are discharged from discharge ports 3a and 3b provided on the left and right side surfaces of the main body case 4, respectively.

In this way, the air flow is generated by a plurality of electromagnetic induction coils 5.
The electromagnetic induction heating cooker 1 according to the present embodiment has a configuration in which the air passage switching guide plate 18 that can be switched so as to guide any one of a and 5b or a plurality of guides at the same time is provided.
Can cool the electromagnetic induction coils 5a and 5b in operation preferentially and satisfactorily.

This air passage switching guide plate 18 is used in the first embodiment.
In the same manner as the electric motor 22, the electromagnetic induction coils 5a, 5a
The position is switched according to the energization status of b.

Further, in this embodiment, an air passage switching guide plate 45 is provided in the middle of the air passage 37. This air passage switching guide plate 45 includes only the electromagnetic induction coil 5a and the electromagnetic induction coil 5b.
When only one of the electromagnetic induction coils 5a and 5b is operated, the air flow switching guide plate 18 is operated and the air flow is controlled by switching to the position d.
It is switchable so as to guide one or more of a and 6b at the same time and to guide one or more of the plurality of electromagnetic induction coils 5a and 5b at the same time. Therefore, the control boards 6a, 6b or the electromagnetic induction coils 5a, 5b in operation can be favorably cooled in good condition.

On the other hand, when both the electromagnetic induction coils 5a and 5b are not operated and only the heater 36 is operated, the air passage switching guide plate 45 is switched to the position "o" to perform intensive air cooling of the heater 36. You can In the present embodiment, the guide 39 is provided on the fan guide 14 so that the heater 36 can be cooled more favorably, and the air passage switching guide plate 45 and the guide 39 can perform good air cooling. The airflow that cools the heater 36 is exhausted to the outside of the main body through the exhaust port 3c provided on the inner side surface of the main body.

Further, when the electromagnetic induction coil 5a alone, the electromagnetic induction coil 5b alone, or both the electromagnetic induction coils 5a and 5b are operated together with the heater 36, the air passage switching guide plate 45 can be switched to the position C. It is possible to cool the electromagnetic induction coils 5a, 5b and their control boards 6a, 6b which are operating together with the heater 36.

Since a plurality of air passage switching guide plates are provided in this manner, the airflow generated by one electric blower can be efficiently used for air cooling of a plurality of heat generating portions.

The position of the air passage switching guide plate 45 is switched by the electric motor 40 as shown in FIG. 8, and the electric motor 40 not only supplies the electric current to the electromagnetic induction coils 5a and 5b but also to the heater 36. In conjunction with the energization status,
The position of the air passage switching guide plate 45 is switched.

The airflow generated by the electric blower 13 can be more efficiently used for air cooling by interlocking a plurality of air passage switching guide plates according to the energization state of each heating portion as described above, and at the same time, the position can be improved. By automating the switching, it is possible to prevent forgetting to switch and improve convenience.

Although the air flow can be sent to the heater 36 and the electromagnetic induction coils 5a and 5b in the present embodiment, the present invention is not limited to this, and the number of electromagnetic induction coils is increased. , By combining a good fan guide shape and multiple air passage switching guide plates to cool the heated part, such as one with more heaters,
It is possible to configure a cooling mechanism for various types of electromagnetic induction heating cookers with one electric blower.

Third Embodiment FIG. 10 shows a sectional view for explaining the third embodiment of the present invention. In the figure, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Electromagnetic induction heating cooker 1 in this embodiment
Has almost the same configuration as in the first embodiment. The present embodiment differs from the first embodiment in that the partition plate 16 that divides the electromagnetic induction heating cooker 1 into upper and lower parts is the same as the first embodiment.
An airflow outlet 41 for cooling the control board 31 for controlling the overall operation of the electromagnetic induction heating cooker 1 such as an operation according to operation information of the operation unit 9 not shown is provided. That is. In this embodiment, the airflow outlet 4
No. 1 is provided on both the control board 6a side and the control board 6b side, and the control board 31 can be air-cooled by the air flow at all times while power is supplied to the main body. In addition,
The airflow obtained by air-cooling the control board 31 from the airflow outlet 41 is configured to be exhausted to the outside of the main body through the exhaust port 3d provided in the lower portion of the operation unit 9. With such a configuration, it is possible to cool the electromagnetic induction heating cooker 1 as a whole by one electric blower 13.

Fourth Embodiment FIG. 11 is a sectional view for explaining the fourth embodiment of the present invention. In the figure, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Electromagnetic induction heating cooker 1 in this embodiment
Has almost the same configuration as in the first embodiment. This embodiment is different from Embodiment 1 in that electric blower 1
The rotating shaft 42 of No. 3 extends vertically, and the propeller portion 13a is located above the rotating shaft 42 and the propeller portion 13 is located below the rotating shaft 42.
b are provided respectively. And the propeller part 1
3a is the electromagnetic induction coil 5 as described in the first embodiment.
An air flow for air cooling the a and 5b and the control boards 6a and 6b is generated.

Further, the propeller portion 13b is constructed so as to take in outside air from the outside of the main body through an intake port 2b provided in the lower portion of the operating portion 9 and exhaust the inside air to the outside through an exhaust port 3e provided at the rear surface of the main body. . Then, control for controlling the overall operation of the electromagnetic induction heating cooker 1 such as the operation according to the operation information of the operation unit 9 not shown in the first embodiment by the airflow generated by the propeller portion 13b. The substrate 31 is cooled. With such a configuration, it is possible to cool the electromagnetic induction heating cooker 1 as a whole by one electric blower 13.

Embodiment 5. FIG. 12 is an enlarged sectional view of an essential part for explaining the fifth embodiment of the present invention. In the figure, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Electromagnetic induction heating cooker 1 in this embodiment
12 has almost the same configuration as in the first embodiment.
As shown in FIG. 6, the temperature of the top plate 10 can be monitored by the thermistor 34 as in the first embodiment. This embodiment is different from the first embodiment in that
The airflow outlet 15a (15b) is provided with the electromagnetic induction coil 5a (5b) and the air passage switching guide plate 43a (43b) so that the airflow can be sent to the top plate 10 better.

This air passage switching guide plate 43a (43b)
Is switched to the position key in the state where the normal electromagnetic induction heating cooker 1 is used, and the air flow is satisfactorily sent to both the electromagnetic induction coil 5a (5b) and the control board 6a (6b) that operate. It is configured to be.

After completion of cooking, the electromagnetic induction coil 5a
When the operations of (5b) and the control board 6a (6b) are completed, the air passage switching guide plate 43a (43b) described above is provided so that the top plate 10 can be efficiently air-cooled in a shorter time.
Is switched to the position C so that the air flow sent to the control board 6a (6b) whose operation has stopped is reduced and the air flow sent to the electromagnetic induction coil 5a (5b) is increased.

In the present embodiment, the motor 4 is also used to switch the position of the air passage switching guide plate 43a (43b).
4a (44b), the operation of the electric motor 44a (44b) is linked to the energization status of the electromagnetic induction coil 5a (5b).

As described above, the electromagnetic induction coil 5a (5b) and its control board 6a (6) are normally used.
The air passage is switched so that the air flow sent to the control board 6a (6b) is reduced after the cooking is finished and the air flow sent to the electromagnetic induction coil 5a (5b) is increased so that the air flow can be sent well to both of b). By the configuration that switches the position of the guide plate,
The time during which the top plate is in a high temperature state after cooking can be shortened, and safety can be improved.

The air passage switching guide plate 43a (43b)
The air passage switching guide plate 43a (43b) can be switched by the electric motor 44a (44b).
It is possible to switch to an accurate position by setting in advance the amount of rotation to be arranged at a position where the air flow can be properly guided.

Furthermore, since the operation of the electric motor 44a (44b) is interlocked with the energization status of the electromagnetic induction coil 5a (5b), it is possible to prevent forgetting to switch the position of the air duct switching guide plate. At the same time, the air-cooled state can be optimized in accordance with the operation of the electromagnetic induction heating cooker 1.

The electromagnetic induction heating cooker of the present invention is not limited to those described in the first to fifth embodiments,
It can be used for various types of electromagnetic induction heating cookers.

[0088]

As described above, according to the electromagnetic induction heating cooker of the present invention, a plurality of electromagnetic induction coils can be cooled by one electric blower, so that the main body can be made compact and lightweight. Is possible. Further, according to the electromagnetic induction heating cooker of the present invention, since a plurality of control boards can be cooled by one electric blower, it is possible to reduce the size and weight of the main body. Further, according to the electromagnetic induction heating cooker of the present invention, by making the air passage switching guide plate operate at a predetermined angle according to the energization state of the electromagnetic induction coil, a plurality of electric blowers performed by one electric blower can be used. It is possible to further improve the cooling efficiency of cooling the electromagnetic induction coil and the control board. Further, according to the electromagnetic induction heating cooker of the present invention, the output of the electric blower is changed according to the energization state of the electromagnetic induction coil, thereby suppressing unnecessary noise of the electric blower and achieving energy saving. It becomes possible. Further, according to the electromagnetic induction heating cooker of the present invention, by having a configuration in which a plurality of air passage switching guide plates are provided,
The airflow generated by one electric blower can be used more effectively. Further, according to the electromagnetic induction heating cooker of the present invention, the safety of the heating cooker is improved by the configuration in which at least a part of the airflow passes between the top plate and the electromagnetic induction coil. Can be improved.

[Brief description of drawings]

FIG. 1 is a perspective perspective view showing a schematic configuration of an electromagnetic induction heating cooker according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a schematic perspective view of the inside of a fan guide for explaining the operation of the air duct switching guide plate 18.

FIG. 4 is a structural diagram of an air passage switching guide plate.

FIG. 5 is a wiring diagram of the electromagnetic induction heating cooker according to the first embodiment.

FIG. 6 is a schematic configuration diagram of a coil support base that supports an electromagnetic induction coil according to the first embodiment.

FIG. 7 is an enlarged cross-sectional view of an essential part showing a state where an electromagnetic induction coil is supported by a coil support base.

FIG. 8 is a perspective perspective view showing an outline of an electromagnetic induction heating cooker according to a second embodiment.

FIG. 9 is a schematic front perspective view for explaining a flow of an airflow generated by the electric blower 13 according to the second embodiment.

FIG. 10 is a cross-sectional view for explaining the third embodiment.

FIG. 11 is a cross-sectional view for explaining the fourth embodiment.

FIG. 12 is an enlarged sectional view of an essential part showing a supporting state of an electromagnetic induction coil by a coil support base according to a fifth embodiment.

FIG. 13 is a schematic perspective view of a conventional electromagnetic induction heating cooker.

14 is a schematic sectional view taken along line BB of the conventional electromagnetic induction heating cooker shown in FIG.

[Explanation of symbols]

1 electromagnetic induction heating cooker, 2 intake port, 3 exhaust port, 4
Main body case, 5 electromagnetic induction coils, 6 control boards, 1
0 top plate, 13 electric blower, 14 fan guide, 18 air passage switching guide plate, 22 electric motor, 31
Control board, 31a control section, 31b electric motor control section, 3
1c Electric blower control unit, 40 electric motor, 43 air passage switching guide plate, 45 air passage switching guide plate.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3K051 AB09 AB10 AB12 AD32 AD37                       CD42 CD43                 3K059 AA08 AB09 AB10 AD07 AD10                       AD32 CD48 CD52 CD72

Claims (6)

[Claims] 1. A main body case provided with an intake port for introducing outside air from the outside and an exhaust port for discharging internal air to the outside, and an object to be heated is heated by electromagnetic induction built in the main body case. Multiple electromagnetic induction coils for
A plurality of electromagnetic induction coils; a control board that controls outputs of the plurality of electromagnetic induction coils; an electric blower that generates an air flow inside the main body; and a fan guide that guides the air flow inside the main body. An electromagnetic induction heating cooker characterized by being provided with an air passage switching guide plate that can be switched to guide one or more of the above. 2. A main body case provided with an intake port for introducing outside air from the outside and an exhaust port for discharging internal air to the outside, and an object to be heated is heated by electromagnetic induction built in the main body case. Multiple electromagnetic induction coils for
A control board provided in each of the plurality of electromagnetic induction coils to control the output of the electromagnetic induction coil, an electric blower for generating an air flow inside the main body, and a fan guide for guiding the air flow inside the main body, An electromagnetic induction heating cooker comprising: an air passage switching guide plate that is switchable so as to guide the air flow to any one or a plurality of the control boards. 3. The electromagnetic induction heating cooker according to claim 1, wherein the air passage switching guide plate is operated by a predetermined angle according to the energization state of the electromagnetic induction coil. 4. The electromagnetic induction heating cooker according to claim 1, wherein the output of the electric blower is changed according to the energization state of the electromagnetic induction coil. 5. The electromagnetic induction heating cooker according to claim 1, wherein a plurality of the air passage switching guide plates are provided. 6. A top plate for mounting an object to be heated is mounted on an upper surface of the main body case, and the plurality of electromagnetic induction coils are arranged to face the top plate, and at least a part of the air flow. 6. The electromagnetic induction heating cooker according to claim 1, wherein the electromagnetic induction heating cooker is configured to pass between the top plate and the electromagnetic induction coil.