JP2002208468A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact induction heating cooker with a well-ordered construction and small noise. SOLUTION: A power supply circuit 25, mounted at the lower side, is cooled by cooling air taken in at an air intake 27 of a main body 21 and sent from a cooling fan 26, and almost a flat box-shaped duct 30, having a guiding inlet 31 also taking in cooling air even at upper part, and a guiding outlet 32 guiding the air to an air outlet 28 which exhausts the air outside the main body 21, is integrally installed in the main body 21. A part of the duct is constructed by forming an opening 30 on the upper part of the duct 30, and practically closing an opening 33 by fitting a coil case 24 and an induction heating coil 23 to the opening 33, thus, the induction heating coil 23 is effectively cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating cooker of a stationary type or a built-in type in a kitchen counter, which is used in a general household kitchen or a commercial kitchen.

[0002]

2. Description of the Related Art Conventionally, a schematic configuration of an induction heating cooker of this type is, for example, a stationary type which is used by being placed on a cabinet 1 in a kitchen as shown in FIG. is there. Reference numeral 2 denotes a main body forming an outer shell of the cooking device, and a top plate 3 made of heat-resistant glass or the like on which a pot of the cooking utensil is placed is provided on an upper surface thereof. An induction heating coil 4 is provided in the vicinity. Reference numeral 5 denotes a coil case for housing the induction heating coil 4 and holding it at a predetermined position in the main body 1. Reference numeral 6 denotes a power supply circuit for supplying high-frequency power to the induction heating coil 4, and reference numeral 7 denotes a cooling fan for cooling the induction heating coil 4 and the power supply circuit 6. Reference numeral 8 denotes an operation unit that houses a control circuit for controlling operation of the device, such as intermittent power supply to the induction heating coil 4 by operation.

[0003]

However, in such a conventional configuration, the flow of the cooling air from the cooling fan 7 is easily affected by the arrangement and shape of the components in the main body 2, so that the induction heating coil It is difficult to efficiently apply cooling air to components requiring cooling, such as the cooling fan 4, so that it is necessary to use a cooling fan 7 having an excessive capacity, or to adjust the flow of the cooling air. In various places, a guide member for changing the direction of the cooling air is required. As a result, there have been problems such as a complicated configuration, an increase in the size of the main body, and an increase in noise due to the operation noise of the fan having an excessive capacity.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an induction heating cooker in which the inside of a main body can be made compact with an orderly configuration and the operation noise is quiet.

[0005]

According to the present invention, in order to solve the above-mentioned problems, an induction heating cooker according to the present invention cools a power supply circuit disposed below by a cooling fan from an intake port of a main body. A substantially flat box-shaped duct having an inlet for taking in the cooling air from the cooling fan and an outlet for guiding the exhaust air to the outside of the main body is provided, and an opening is formed on the upper surface of the duct, and a coil is formed. The opening is substantially closed by fitting a case and an induction heating coil.

[0006] Thereby, the cooling air can be sent to the induction heating coil stably and efficiently, and the inside can be made compact and the noise of the cooling fan can be reduced by reducing the size of the cooling fan without complicated structure. it can.

[0007]

DETAILED DESCRIPTION OF THE INVENTION The invention according to a first aspect of the present invention is directed to a main body, a top plate on which a cooked utensil disposed above the main body is placed, and at least a bottom plate provided below the top plate. 1
At least one induction heating coil, a power supply circuit for supplying high-frequency power to the induction heating coil, a cooling fan for cooling the induction heating coil, the power supply circuit, and the like, an inlet for taking in cooling air from the cooling fan, and a main body. A substantially flat box-shaped duct having an outlet for guiding to an exhaust port to be discharged to the outside is provided, an opening is formed on the upper surface of the duct, and a coil case and an induction heating coil are fitted to form the opening. It is almost closed. By making the induction heating coil a part of the configuration of the duct, the flow of the cooling air can be stabilized and efficiently cooled without being affected by the arrangement and shape of other parts, so that the overall structure can be simplified. In addition, the cooling fan can be reduced in size and rotation speed, so that the operating noise can be reduced to reduce noise.

According to the second aspect of the present invention, by arranging a dedicated air blowing means at the cooling air inlet of the duct, the induction heating coil, the cooling fan and the passage of the cooling air can be unitized, and the unit is provided. Performance can be ensured in the state, easy to mount on other models, and versatility is enhanced.

According to a third aspect of the present invention, a part of the upper surface of the duct is formed in the coil case for holding the induction heating coil, so that the number of parts can be reduced, the cost is reduced, and the number of assembly steps is reduced. be able to.

According to a fourth aspect of the present invention, an intermediate opening is formed in the middle of the path from the cooling air inlet to the outlet of the duct to branch the cooling air, and the cooling air is supplied to a power circuit or the like. By sending air to the cooling part, the surplus cooling air due to the efficiency of cooling can be used for cooling other parts.

According to a fifth aspect of the present invention, a cooling wind is provided in a duct by providing a movable wind direction plate that preferentially guides air blown from a cooling fan to an operating induction heating coil side. Since the cooling fan can be used without waste, the rotation speed of the cooling fan can be reduced according to the operation state of the induction heating coil, and the noise can be further reduced.

[0012]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a main part of a schematic configuration of an induction heating cooker according to a first embodiment of the present invention. Reference numeral 21 denotes a main body, and on the upper surface of the main body 21, a top plate 22 on which a cooked utensil is placed is disposed. 23
Denotes an induction heating coil, and 24 denotes a coil case for housing the induction heating coil 23 and holding it at a predetermined position in the main body 21. Reference numeral 25 denotes a power supply circuit serving as a power supply part for supplying high-frequency power to the induction heating coil 23.

Reference numeral 26 denotes an induction heating coil 23 and a power supply circuit 2.
A cooling fan for cooling the cooling air 5, and takes in air taken in from an air inlet 27 on the rear surface of the main body 21 and supplies it to the induction heating coil 23 and the power supply circuit 25 as cooling air. Then, the air after cooling passes through the exhaust port 28 on the rear surface of the main body 21 and passes through the main body 2.
It is discharged outside.

29 is an operation of the induction heating coil 2
3 is an operation unit that houses therein a control circuit for controlling the operation of the device, such as intermittent power supply to the power supply 3.

Reference numeral 30 denotes a substantially flat box-shaped duct having an inlet 31 for taking in the cooling air from the cooling fan 26 and an outlet 32 for leading to the outlet 28. An opening 33 is formed on the upper surface of the duct. The opening 3 is formed by fitting the induction heating coil 23 and the coil case 24.
3 is substantially closed.

That is, the induction heating coil 23 and the coil case 24 form a part of the configuration of the duct 30, and the surface of the induction heating coil 23 to be cooled forms a part of the inner wall of the duct 30.

In this configuration, when high-frequency power is supplied to the induction heating coil 23 by the power supply circuit 25 and the cooling fan 26 is energized in accordance with the heating of the cooking utensil placed on the top plate 22, the air inlet 27 A part of the air taken in from the cooling fan 26 is sent from the inlet 31 of the duct 30.

The air fed into the inlet 31 passes through the inside of the main body of the duct 30 and contacts the surface of the induction heating coil 23 which forms a part of the inner wall of the duct 30 to take heat therefrom. Then, it passes through the outlet 32 and is discharged to the outside of the main body 21 through the exhaust port 28.

Since the flow of the cooling air in the duct 30 is hardly affected by the arrangement and shape of the components in the main body 21, the cooling of the induction heating coil 23 is naturally stable. Can be used efficiently.

In this embodiment, the number of induction heating coils 23 is two. However, the same effect can be obtained even in the case of one or three or more.

(Embodiment 2) FIG. 2 is an exploded perspective view showing a main part of a schematic configuration of an induction heating cooker according to Embodiment 2 of the present invention. Here, since the entire configuration is the same as that of the first embodiment, the description is omitted. Reference numeral 41 denotes a second cooling fan,
The cooling means is attached to the inlet 31 for exclusive use.

With this configuration, the induction heating coil 23, the cooling fan 41, and the duct 30 serving as a cooling air passage are provided.
By making the unit into a unit, the performance can be ensured in the unit state, the mounting on other models becomes easy, and the versatility is enhanced. The number of induction heating coils 23 is not limited to two as in the first embodiment.

(Embodiment 3) FIG. 3 is an exploded perspective view showing a schematic configuration of an induction heating cooker according to Embodiment 3 of the present invention.
Here, the overall configuration is substantially the same as that of the first embodiment, and a description thereof will be omitted. The upper surface of the main body 52 of the duct 51 has an opening 53.
On the other hand, the periphery 56 of the induction heating coil 23 accommodating portion 55 of the coil case 54 extends outward substantially in a flange shape, and is formed into a shape to be fitted to the opening 53 of the duct 51. I have.

By forming a part of the upper surface of the duct 51 with this configuration, that is, with the coil case 54, the number of parts can be reduced, and the cost and the number of assembly steps can be reduced. The number of induction heating coils 23 is not limited to two as in the first embodiment.

(Embodiment 4) FIG. 4 is an exploded perspective view showing a main part of a schematic configuration of an induction heating cooker according to Embodiment 4 of the present invention. Here, the entire configuration is substantially the same as that of the first embodiment, and only different portions will be described. An intermediate opening 64 is formed in the middle of the path from the inlet 62 to the outlet 63 of the duct 61.

When the cooling fan 26 is operated to move inside the duct 61, the cooling air is branched at the intermediate opening 64 and sent out of the duct 61. The direction of the outlet of the intermediate opening 64 is directed toward the power supply circuit 25, and
The generated cooling air is supplied to the power supply circuit 25 to cool it.

With this configuration, the cooling air is sent to the required cooling portion such as the power supply circuit 25, so that the excess cooling air can be used for cooling other parts by increasing the cooling efficiency. The number of induction heating coils 23 is not limited to two as in the first embodiment.

(Embodiment 5) FIGS. 5 to 7 are exploded perspective views of a main part of a schematic configuration of an induction heating cooker according to Embodiment 5 of the present invention. The configuration is substantially the same as that of the above-described embodiment, and only different portions will be described. In FIG. 5, a partition wall 72 that partitions the inside of the duct 71 into two rooms is formed inside the duct 71.

Reference numeral 73 denotes a movable wind direction plate disposed close to the partition wall 72, and is rotatably attached to a shaft 74.

The duct 7 is formed by the partition wall 72 and the wind direction plate 73.
The interior of 1 is divided into a first room 75a and a second room 75b, and these rooms are substantially independent except that they communicate with each other through an inlet 76 and an outlet 77.

The upper portions of the first room 75a and the second room 75b are fitted with the first induction heating coil 23a and the second induction heating coil 23b, respectively.

FIG. 5 shows the first induction heating coil 23.
a, the second induction heating coil 23b indicates a state when neither or both are used, and in this state, the wind direction plate 73 is in the neutral position, and the first room 75a and the second Each of the second rooms 75b communicates with the inlet 76 and the outlet 77 to form a cooling air path.

In this configuration, the power supply circuit 25 is connected to the first induction heating coil 23a and the second induction heating coil 23b.
When high-frequency power is supplied to the cooling fan 26 in accordance with the heating of the cooking utensil placed on the top plate 22, air taken in from the air inlet 27 is partially removed by the cooling fan 26. It is sent into the inlet 76 of the duct 71.

At this time, the cooling air is diverted by the inlet 77, passes through both the first room 75 a and the second room 75 b, and becomes the first guide forming a part of the inner wall of the duct 71. Heating coil 23a and second induction heating coil 23b
After being cooled, it is sent to the outlet 77, merges at the outlet, and is discharged out of the main body through the exhaust port.

When only the first induction heating coil 23a is used, as shown in FIG. 6, the wind direction plate 73 is connected to the second room 75b.
The position of the cooling air is changed to a position at which the entrance to the entrance is substantially closed, and the cooling air is preferentially sent to the first room 75a.

Accordingly, in this state, since the first induction heating coil 23a can be cooled with the normal capacity of the cooling fan 26 or less, the rotation speed of the cooling fan 26 can be reduced, and as a result, the cooling The rotation noise of the fan 26 can be reduced, and the noise of the body can be reduced.

On the other hand, when only the second induction heating coil 23b is used, as shown in FIG. 7, the wind direction plate 73 changes its position to a position that substantially closes the entrance to the first room 75a, and the cooling air is It is preferentially sent to the second room 75a.

As a result, the rotational noise of the cooling fan 26 can be reduced as in the case of FIG.

[0039]

As described above, according to the present invention, a substantially flat box-shaped duct having an inlet for taking in the cooling air from the cooling fan and an outlet for guiding the air to the outlet for discharging outside the main body is arranged. By installing an induction heating coil in the opening on the upper surface of the duct and substantially closing the opening, that is, by making the induction heating coil a part of the duct configuration, the flow of cooling air Stable and efficient cooling can be achieved without being affected by the arrangement and shape of parts, so the overall structure can be simplified.
Suppresses driving noise and reduces noise.

Further, by arranging a dedicated air blowing means at the inlet of the duct, the induction heating coil, the cooling fan and the passage of the cooling air can be unitized, and the performance can be secured in the unit state. Mounting on a model becomes easy, and versatility is enhanced.

Further, by forming a part of the upper surface of the duct with the coil case holding the induction heating coil, the number of parts can be reduced, and the cost and the number of assembling steps can be reduced.

Also, an intermediate opening is formed in the middle of the path from the inlet to the outlet of the duct to branch the cooling air, and the cooling air is sent to a required cooling portion such as a power supply circuit, so that the cooling efficiency is improved. Surplus cooling air can be used for cooling other parts.

Further, by providing a movable wind direction plate for preferentially guiding the air blown from the cooling fan to the operating induction heating coil side in the duct, the cooling air can be used without waste. Therefore, the number of rotations of the cooling fan can be controlled according to the operation state of the induction heating coil, and the noise can be further reduced.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view of a main part showing a schematic configuration of an induction heating cooker according to a second embodiment of the present invention.

FIG. 3 is an exploded perspective view of a main part showing a schematic configuration of an induction heating cooker according to a third embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a fourth embodiment of the induction heating cooker according to the present invention.

FIG. 5 is an exploded perspective view showing a fifth embodiment of the induction heating cooker according to the present invention.

FIG. 6 is an exploded perspective view showing a main part of the operation of the fifth embodiment of the induction heating cooker according to the present invention.

FIG. 7 is an exploded perspective view of the main part.

FIG. 8 is an exploded perspective view showing a schematic configuration of a conventional induction heating cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Main body 22 Top plate 23 Induction heating coil 23a 1st induction heating coil 23b 2nd induction heating coil 24 Coil case 25 Power supply circuit 26 Cooling fan 27 Intake port 28 Exhaust port 30 Duct 31 (Duct) inlet 32 (Duct) Outlet 41 second cooling fan 51 duct 52 main body (of duct) 53 opening (of duct) 55 storage section 56 flange-shaped peripheral part of storage section 61 duct 62 introduction port (of duct) 63 (duct) Outlet 64 (intermediate opening) (of duct) 71 duct 72 partition wall 73 wind direction board 75a first room 75b second room 76 inlet (of duct) 77 outlet (of duct)

Claims (5)

[Claims] 1. A main body, a top plate on which a cooking utensil disposed above the main body is placed, at least one or more induction heating coils provided below the top plate, and the induction A power supply circuit for supplying high-frequency power to the heating coil, a cooling fan for cooling the induction heating coil, the power supply circuit, and the like; an inlet for taking in cooling air from the cooling fan; An induction heating cooking device comprising a substantially flat box-shaped duct having an outlet for leading to an opening, forming an opening in the upper surface of the duct, fitting the induction heating coil, and substantially closing the opening. vessel. 2. The induction heating cooker according to claim 1, wherein a dedicated blowing means is provided at a cooling air inlet of the duct. 3. The induction heating cooker according to claim 1, wherein a part of the upper surface of the duct is formed by a coil case holding the induction heating coil. 4. A cooling air branch is formed in a middle of a path from a cooling air introduction port to a discharge port of the duct to branch the cooling air and send the cooling air to a required cooling portion such as a power supply circuit. 2. The induction heating cooker according to 1. 5. A blower from a cooling fan in a duct,
2. The induction heating cooker according to claim 1, further comprising a movable wind direction plate for preferentially guiding to the operating induction heating coil side.