JP4348865B2 - Induction heating cooker - Google Patents

Description

[0001]
BACKGROUND 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 used in a kitchen of a general household or a commercial kitchen.
[0002]
[Prior art]
Conventionally, the general configuration of this type of induction heating cooker is, for example, a stationary type, which is used by being placed on a cabinet 1 in a kitchen as shown in FIG. 2 is a main body that forms the outer shell of the cooking device, and a top plate 3 made of heat-resistant glass or the like on which the pan of the cooked utensil is placed is provided on the upper surface. An induction heating coil 4 is provided in close proximity. A coil case 5 accommodates the induction heating coil 4 and holds it at a predetermined position in the main body 1. A power supply circuit 6 supplies high-frequency power to the induction heating coil 4, and a cooling fan 7 cools 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 the operation of the device, such as intermittent power supply to the induction heating coil 4.
[0003]
[Problems to be solved by the invention]
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, and therefore cooling including the induction heating coil 4 is required. It is difficult to cool the parts efficiently by applying cooling air. For this reason, it is necessary to use a cooling fan 7 having an excessive capacity, and in order to adjust the flow of the cooling air, A guide member for changing the direction is required. As a result, there have been problems such as complication of configuration, accompanying increase in size of the main body, and increase in noise due to excessively high fan operating noise.
[0004]
The present invention solves such a conventional problem, and an object of the present invention is to provide an induction heating cooker in which the inside of the main body can be made compact with an orderly structure and the operation noise is quiet.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the induction heating cooker of the present invention introduces cooling air from the cooling fan and cools the power circuit disposed below by a cooling fan from the inlet of the main body. A substantially flat box-shaped duct having an outlet and a lead-out port for leading to an exhaust port for discharging to the outside of the main body is disposed, an opening is formed on the upper surface of the duct, and the coil case and the induction heating coil are fitted. The opening is substantially closed.
[0006]
Thereby, the cooling air can be stably and efficiently sent to the induction heating coil, and the internal noise can be reduced and the noise can be reduced by reducing the size of the cooling fan without using a complicated structure.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 is a main body, a top plate for placing a cooking utensil disposed above the main body, and at least one induction heating coil provided below the top plate. 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 introduction port for taking in cooling air from the cooling fan, and an exhaust port for discharging outside the main body A duct having a substantially flat box shape having a lead-out port for leading to the top, having an opening formed on the upper surface of the duct, and fitting the coil case and the induction heating coil to substantially close the opening. . By making the induction heating coil a part of the structure of the duct, the flow of cooling air can be stabilized and efficiently cooled without being affected by the arrangement and shape of other parts, so the overall structure can be simplified. In addition, the cooling fan can be reduced in size to reduce operating noise by reducing the size and speed.
[0008]
According to the second aspect of the present invention, by providing a dedicated blowing means at the cooling air inlet of the duct, the induction heating coil, the cooling fan, and the cooling air passage can be unitized, and the performance in the unit state Can be secured, it can be easily mounted on other models, and versatility is enhanced.
[0009]
The invention according to claim 3 is a coil case for holding the induction heating coil, and by forming a part of the upper surface of the duct, the number of parts can be reduced, and the cost and the assembly man-hour can be reduced. .
[0010]
In the invention according to claim 4, the cooling air is branched by forming an intermediate opening in the middle of the path from the inlet of the cooling air to the outlet of the duct, and the cooling air is supplied to a required cooling part such as a power circuit. By blowing air, the cooling air surplus due to the efficiency of cooling can be used for cooling other components.
[0011]
According to the fifth aspect of the present invention, the cooling wind can be used without waste by providing a movable wind direction plate that preferentially guides the air blown from the cooling fan toward the operating induction heating coil in the duct. Therefore, the number of rotations of the cooling fan can be reduced according to the operation state of the induction heating coil, and noise can be further reduced.
[0012]
【Example】
(Example 1)
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a main part showing a schematic configuration of an induction heating cooker showing a first embodiment of the present invention. Reference numeral 21 denotes a main body, and a top plate 22 on which a cooking utensil to be heated is placed is disposed on the upper surface of the main body 21. Reference numeral 23 denotes an induction heating coil, and reference numeral 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 portion for supplying high frequency power to the induction heating coil 23.
[0013]
Reference numeral 26 denotes a cooling fan for cooling the induction heating coil 23 and the power supply circuit 25. The cooling fan 26 takes in air taken in from the air inlet 27 on the rear surface of the main body 21 and supplies it as cooling air to the induction heating coil 23 and the power supply circuit 25. The cooled wind is discharged outside the main body 21 through the exhaust port 28 on the rear surface of the main body 21.
[0014]
Reference numeral 29 denotes an operation unit that accommodates therein a control circuit for controlling the operation of the device, such as intermittent power supply to the induction heating coil 23.
[0015]
30 is a substantially flat box-shaped duct having an inlet 31 for taking in cooling air from the cooling fan 26 and an outlet 32 for leading to the exhaust 28, and an opening 33 is formed on the upper surface thereof. By fitting the induction heating coil 23 and the coil case 24, the opening 33 is substantially closed.
[0016]
That is, the induction heating coil 23 and the coil case 24 become a part of the structure of the duct 30, and the surface to be cooled of the induction heating coil 23 forms a part of the inner wall of the duct 30.
[0017]
In this configuration, when high frequency power is supplied to the induction heating coil 23 by the power supply circuit 25 and the cooking fan placed on the top plate 22 is heated to energize the cooling fan 26, it is taken in from the air inlet 27. Part of the air is sent from the inlet 31 of the duct 30 by the cooling fan 26.
[0018]
The air sent into the introduction port 31 passes through the duct 30 main body, contacts the surface of the induction heating coil 23 constituting a part of the inner wall, and passes through the heat. Then, it passes through the outlet 32 and is discharged out of the main body 21 through the exhaust port 28.
[0019]
Here, 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, naturally the cooling of the induction heating coil 23 is also stable, and the air blowing from the cooling fan 26 is efficient. Can be used.
[0020]
In the present embodiment, there are two induction heating coils 23, but the same effect can be obtained even in the case of one or three or more.
[0021]
(Example 2)
FIG. 2 is an exploded perspective view of a main part showing a schematic configuration of an induction heating cooker showing Embodiment 2 of the present invention. Here, since the entire configuration is the same as that of the first embodiment, the description thereof is omitted. Reference numeral 41 denotes a second cooling fan, which is attached to the inlet 31 of the duct 30 and serves as a dedicated cooling means.
[0022]
With this configuration, the induction heating coil 23, the cooling fan 41, the duct 30 that is the passage of the cooling air, and the like are unitized, so that performance can be ensured in the unit state, and mounting on other models becomes easy. Increased versatility. The number of induction heating coils 23 is not limited to two, as in the first embodiment.
[0023]
(Example 3)
FIG. 3 is an exploded perspective view showing a schematic configuration of an induction heating cooker showing Embodiment 3 of the present invention. Here, the entire configuration is substantially the same as that of the first embodiment, and thus the description thereof is omitted. An opening 53 is formed on the upper surface of the main body 52 of the duct 51, while the periphery 56 of the coil case 54 around the induction heating coil 23 storage portion 55 extends outward in a substantially bowl shape, It is formed in a shape that fits into the opening 53.
[0024]
By forming a part of the upper surface of the duct 51 with this configuration, that is, the coil case 54, the number of parts can be reduced, and the cost can be reduced 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.
[0025]
Example 4
FIG. 4 is an exploded perspective view of a main part showing a schematic configuration of an induction heating cooker showing Embodiment 4 of the present invention. Here, the overall 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.
[0026]
When the cooling fan 26 is operated and the cooling air moves in the duct 61, it 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 to the power supply circuit 25, and the cooling air discharged from the intermediate opening 64 is supplied to the power supply circuit 25 to cool it.
[0027]
With this configuration, the cooling air that is surplus due to the efficiency of cooling can be used for cooling other components by sending the cooling air to the required cooling part such as the power supply circuit 25. The number of induction heating coils 23 is not limited to two, as in the first embodiment.
[0028]
(Example 5)
5-7 is an exploded perspective view of a main part showing a schematic configuration of an induction heating cooker showing Embodiment 5 of the present invention. The configuration is substantially the same as in the previous embodiment, and only the differences 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.
[0029]
Reference numeral 73 denotes a movable wind direction plate disposed in the vicinity of the partition wall 72 and is rotatably attached to the shaft 74.
[0030]
The inside of the duct 71 is divided into a first room 75 a and a second room 75 b by the partition wall 72 and the wind direction plate 73, and these rooms are in a substantially independent state except that they communicate with each other through the inlet port 76 and the outlet port 77. It has become.
[0031]
The upper portions of the first chamber 75a and the second chamber 75b are respectively fitted with the first induction heating coil 23a and the second induction heating coil 23b.
[0032]
Here, FIG. 5 shows a state when neither the first induction heating coil 23a nor the second induction heating coil 23b is used, or when both are used. In this state, the wind direction plate 73 is neutral. The first chamber 75a and the second chamber 75b are both in communication with the inlet port 76 and the outlet port 77, and form a path for cooling air.
[0033]
In this configuration, the first induction heating coil 23a and the second induction heating coil 23b are supplied with high-frequency power by the power supply circuit 25 and cooled in accordance with heating of the cooking utensil placed on the top plate 22. When the fan 26 is energized, a part of the air taken in from the air inlet 27 is sent to the inlet 76 of the duct 71 by the cooling fan 26.
[0034]
At this time, the cooling air is diverted by the introduction port 77, passes through both the first room 75a and the second room 75b, and forms a part of the inner wall of the duct 71. And after cooling the 2nd induction heating coil 23b, it is sent to the outlet 77, merges at the outlet, and is discharged out of the main body through the outlet.
[0035]
When only the first induction heating coil 23a is used, the orientation of the wind direction plate 73 is changed to a position that substantially closes the entrance to the second room 75b as shown in FIG. 6, and the cooling air is supplied to the first room 75a. Will be sent preferentially.
[0036]
Therefore, in this state, since the first induction heating coil 23a can be cooled below the normal capacity of the cooling fan 26, the number of rotations of the cooling fan 26 can be reduced. Rotational noise can be reduced, and the noise of the body can be reduced.
[0037]
On the other hand, when only the second induction heating coil 23b is used, the orientation of the wind direction plate 73 is changed to a position where the entrance to the first chamber 75a is substantially closed as shown in FIG. It is sent preferentially toward the room 75a.
[0038]
As a result, the rotational noise of the cooling fan 26 can be reduced as in the case of FIG.
[0039]
【The invention's effect】
As described above, according to the present invention, a substantially flat box-shaped duct having an introduction port for taking in cooling air from the cooling fan and a lead-out port for leading to the exhaust port for discharging outside the main body is disposed. By fitting the induction heating coil into the opening on the upper surface and substantially closing the opening, that is, by making the induction heating coil a part of the duct configuration, the flow of cooling air can be arranged and shaped in other parts. Because it can be cooled stably and efficiently without being affected by the above, the overall structure can be simplified, and the cooling fan can be reduced in size and driven at low speed by reducing the size and speed.
[0040]
In addition, by installing a dedicated blower at the duct inlet, the induction heating coil, cooling fan and cooling air passage can be unitized, ensuring performance in that unit state, and to other models. Mounting becomes easy and versatility increases.
[0041]
In addition, by forming a part of the upper surface of the duct with the coil case that holds the induction heating coil, the number of parts can be reduced, and the cost and the number of assembly steps can be reduced.
[0042]
In addition, an intermediate opening is formed in the middle of the path from the duct inlet to the outlet, and the cooling air is branched. The resulting cooling air can be used to cool other parts.
[0043]
Furthermore, by installing a movable wind direction plate that preferentially guides air from the cooling fan to the operating induction heating coil side in the duct, the cooling air can be used without waste. The number of rotations of the cooling fan can be controlled according to the operating state of the heating coil, and noise can be further reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a main part showing a schematic configuration of an induction heating cooker according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view 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. 6 is an exploded perspective view showing the operation of the fifth embodiment of the induction heating cooker according to the present invention. FIG. FIG. 8 is an exploded perspective view showing a schematic configuration of a conventional induction heating cooker.
21 Main body 22 Top plate 23 Induction heating coil 23a First induction heating coil 23b Second induction heating coil 24 Coil case 25 Power supply circuit 26 Cooling fan 27 Intake port 28 Exhaust port 30 Duct 31 (Duct) Inlet port 32 (Duct) ) Outlet 41 second cooling fan 51 duct 52 (duct) main body 53 (duct) opening 55 storage part 56 bowl-like peripheral part 61 of the storage part 62 duct 62 (duct) inlet 63 (duct) Outlet port 64 (Duct) Intermediate opening 71 Duct 72 Partition 73 Wind direction plate 75a First chamber 75b Second chamber 76 (Duct) inlet 77 (Duct) outlet

Claims (5)

A main body, a top plate on which the cooked utensil disposed above the main body is placed, at least one induction heating coil provided below the top plate, and high frequency power to the induction heating coil And a cooling fan that cools the induction heating coil and the power supply circuit, etc., and a guide for introducing the cooling air from the cooling fan to the inlet and the exhaust outlet that discharges the outside of the main body. An induction heating cooker comprising a substantially flat box-shaped duct having an outlet, having an opening formed on an upper surface of the duct, and fitting the induction heating coil to substantially close the opening. The induction heating cooker according to claim 1, wherein a dedicated air blowing means is disposed at a cooling air inlet of the duct. The induction heating cooker according to claim 1, wherein a coil case for holding the induction heating coil forms a part of the upper surface of the duct. The induction heating according to claim 1, wherein an intermediate opening is formed in the middle of a path from the inlet of the cooling air to the outlet of the duct to branch the cooling air, and the cooling air is blown to a portion requiring cooling such as a power circuit. Cooking device. The induction heating cooker according to claim 1, wherein a movable wind direction plate is provided in the duct to preferentially guide the air blown from the cooling fan toward the operating induction heating coil.

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