JP2002198163A - Induction cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heat cooker that has high reliability and stability by stabilizing flow of cooling air and increasing efficiency in the cooling structure of the cooker, and that is low cost and has high assembly performance. SOLUTION: The induction cooker comprises an inverter circuit 52, that drives the heating coil 51, a support bottom plate 53 that supports a heating coil 51, and a wall 54, that is positioned on the exhaust air side of the fan motor unit 56 that cools the heating coil 51 and an inverter circuit 52. A wall 54 is positioned at the upper side of the lower face of the heating coil 51, and an opening part 55 is provided between the wall 54 and the heating coil 51, and the cooling air from the opening part 55 is made to flow toward the reverse direction by the wall 54. Thereby, efficient suction air passage is introduced and also the number of components can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure in an induction heating cooker.

[0002]

2. Description of the Related Art FIG. 8 shows a cooling structure of a conventional induction heating cooker.
Will be described. 1 is a heating coil, 2 is a heating coil 1
Circuit, a bottom plate for supporting the inverter circuit, a fan motor unit for cooling the heating coil 1 and the inverter circuit 2, a support for supporting the fan motor unit 4, and a fan motor unit 3. The support 4 is arranged so that the rotation direction of the fan is parallel to the horizontal direction.
Fixed to. 6 is a lid for guiding the intake air to the inverter circuit, 7 is an intake port which is a cooling air intake port, 8 is a case for guiding the cooling air sucked from the intake port to the inside of the main body, and 9 is a shell supporting all of them. It is.

[0003]

However, in such a structure, the cooling air sucked from the intake port 7 passes through the inside of the case 8, that is, once sucked downward, and then from below the fan motor unit 4. It is sucked up and hits the lid 6 located above the fan motor unit 4, and then flows through the inside of the lid 6 to the inverter circuit 2 and then to the heating coil 1. Had a very inefficient configuration. Further, the inverter circuit 2 has a bottom plate 3
In addition, since the fan motor unit 4 is fixed to a separate component such as the support 5, the cooling air may escape in the intake path between the unconnected bottom plate 3 and the support 5 in the cooling configuration. The flow of cooling air is not stable even in the inside of the lid 6 when flowing in an uneven direction, and the number of parts increases in structural parts, and expensive parts must be used. However, there was a problem that the cost was high.

Therefore, the present invention solves the above-mentioned conventional problems. The cooling efficiency of the heating coil inside the main body and the electronic components on the inverter circuit is good, and the reliability is reduced by reducing the number of components. It is an object of the present invention to provide a low-cost, highly assemblable device having extremely high safety.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a heating coil, an inverter circuit for driving the heating coil, a support bottom plate for supporting at least the heating coil, the heating coil and an inverter. A fan motor unit for cooling a circuit, and a wall positioned on the exhaust side with respect to the fan motor unit, wherein the upper surface of the wall is located above the lower surface of the heating coil, and the wall and the heating coil With an opening in between,
By using an induction heating cooker in which the cooling air from the opening is caused to flow in the opposite direction by the wall, an intake path that can efficiently cool the inverter circuit and the heating coil is guided,
And the number of parts can be reduced.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION

The invention according to claim 1 includes a heating coil and an inverter circuit and a heating coil for driving the heating coil, or a support bottom plate for supporting the inverter circuit and a fan motor unit for cooling the heating coil and the inverter circuit. The bottom plate has a wall located on the exhaust side with respect to the fan motor unit, the height of which is located above the lower surface of the heating coil, and has an opening between the wall and an end surface of the heating coil in the wall direction. By flowing the cooling air from the opening in the opposite direction through the wall, the intake air sucked from the intake port passes through the fan motor unit to the inside of the main body, cools the inverter circuit, and then blows up the cooling air. Since the wall is made to flow in the opposite direction and the heating coil can be efficiently cooled, the reliability of the device can be improved. In addition, since the support bottom plate and the lid can be formed by one component, a low-cost device with good assemblability that can reduce the number of components can be provided.

[0008]

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, 11 is a heating coil, 12 is an inverter circuit for driving the heating coil 11, 13 is a fan motor unit for cooling the heating coil 11 and the inverter circuit 12, and 14 is an inverter circuit 12 and a fan motor unit 13. It is a supporting body to support. In the support 14, 15 is a bottom surface supporting the fan motor unit 13, 16 is a bottom surface located on the fan motor unit 13 suction side, and a bottom surface 16 located on the fan motor unit suction side is a bottom surface 15 supporting the fan motor unit. It is located below. Reference numeral 17 denotes a cooling air suction port, which is located on the bottom surface 16 located on the fan motor unit suction side. Reference numeral 18 denotes an outer shell that supports all of them, and the support 14
Is built in.

Next, the operation of the first embodiment will be described. Normally, when the induction heating cooker is operated, the heating coil 11 inside the main body and the electronic components on the inverter circuit 12 are cooled, so that the cooling air needs to be sucked in from the air inlet 17 by the rotation of the fan of the fan motor unit 13. is there. At this time, it is assumed that water has inadvertently entered from the intake port 17. The water passes through the intake port 17 and accumulates on the bottom surface 16 located on the suction side of the fan motor unit.
However, since the bottom surface 16 located on the suction side of the fan motor unit located below the intake port 17 is located below the bottom surface 15 supporting the fan motor unit, a large amount of water has entered through the intake port 17. If not,
The water is accumulated only on the bottom surface 26 located on the suction side of the fan motor unit, and water does not directly enter the inside of the main body.

Further, in this configuration, the inverter circuit 12 is provided inside the main body and the fan motor unit 1 is provided.
3 is fixed to a support 14 which is a single component inside the main body near the intake port 15, so that the inverter circuit 12 and the fan motor unit 13 are fixed to the support 14 at the time of assembly, and then the support 14 is fixed. Since it can be assembled in the outer shell 16, it is possible to realize an assembling process with very good workability and no man-hour.

With these features, it is possible to prevent water from entering the inside of the main body and prevent water from adhering to the charging section, thereby improving the safety of the device. In addition, since the support of the inverter circuit 12 and the fan motor unit 13 is made as an integral part, an efficient intake path is ensured so that the intake air does not escape from the clearance, and the number of parts can be reduced. Very good equipment can also be provided.

Embodiment 2 Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

In FIG. 2, 21 is a heating coil, 22 is an inverter circuit for driving the heating coil 21, 23 is a fan motor unit for cooling the heating coil 21 and the inverter circuit 22, and 24 is an inverter circuit 22 and a fan motor unit 23. It is a supporting body to support. In the support 24, 25 is a bottom surface supporting the fan motor unit 23, 26 is a bottom surface located on the suction side of the fan motor unit 23, and the bottom surface 26 located on the fan motor unit is higher than the bottom surface 35 supporting the fan motor unit. It is located below and has a hole 27 in the bottom surface. Reference numeral 28 denotes an intake port that is a cooling air intake port,
Reference numeral 29 denotes a shell supporting all of them.

Next, the operation of the second embodiment will be described. Usually, when the induction heating cooker is operated, the heating coil 21 inside the main body and the electronic components on the inverter circuit 22 are cooled, so that the cooling air needs to be sucked from the air inlet 27 by the rotation of the fan of the fan motor unit 23. is there. At this time, it is assumed that water intrudes from the air inlet 27 by mistake. The water passes through the intake port 28 and accumulates on the bottom surface 26 located on the suction side of the fan motor unit. However, since the bottom surface 26 located on the suction side of the fan motor unit located below the intake port 28 is located lower than the bottom surface 25 supporting the fan motor unit, water entering from the intake port 28 The bottom surface 26 that is accumulated only on the bottom surface 26 located on the suction side of the motor unit and that is located on the suction side of the fan motor unit
Since there is the hole 27 on the upper side, the intruded water is discharged from the hole 27 to the outside of the intake unit, and the water does not directly enter the inside of the main body.

As a result, the infiltration of water into the main body can be further prevented as compared with the case of the first embodiment, and the adhesion of water to the charging section can be prevented, so that the safety of the device can be further improved. Can be. Further, as in the case of Example 1, the support 2
4 is an integral part, so that an efficient air intake path where the air does not escape from the clearance can be formed and the number of parts can be reduced, so that it is also possible to provide a low-cost and extremely easy-to-assemble device. .

(Embodiment 3) Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.

In FIG. 3, 31 is a heating coil, 32 is an inverter circuit for driving the heating coil 31, 33 is a fan motor unit for cooling the heating coil 31 and the inverter circuit 32, and 34 is an inverter circuit and a fan motor unit 33. Reference numeral 35 denotes a supporting body for supporting, and reference numeral 35 denotes an intake port which is a suction port for cooling air. The fan motor unit 33 is fixed on the support 34 near the air inlet 35. A cover 36 covers at least the upper portion of the fan motor unit, and plays a role of guiding cooling air to the inverter circuit 32. A cover 37 is provided between the intake port 35 and the fan motor unit 33 from the lower surface of the cover. The flow of elongating, intake air is a wall that is formed vertically. Reference numeral 38 denotes a radiation fin for fastening a heat-generating component,
It is on the inverter circuit 32.

Next, the operation of the third embodiment will be described. Normally, when the induction heating cooker is operated, the heating coil 31 inside the main body and the electronic components on the inverter circuit 32 are cooled, so that it is necessary to suck the cooling air from the intake port 35 by the rotation of the fan of the fan motor unit 33. is there. Then, it is necessary to guide the inside of the main body. In this configuration, the cooling air sucked in from the fan motor unit 33 has a path defined by the lid 36 above the fan motor unit 33, and the inverter circuit 3
2 to form an efficient cooling configuration. In the third embodiment, the lid 36 is attached from above the fan motor unit 33 so as to cover the radiation fins 38 for fastening the heat-generating components. Therefore, the cooling air is determined so as to be applied to the radiating fins 38, which are the most heat generating sources, so that better cooling performance can be obtained. Further, since the lid 36 has a wall 37 extending downward from the lower surface of the lid between the intake port 35 and the fan motor unit 33 and formed vertically with respect to the flow of intake air, for example, Even if water enters through the port 35 and is sucked in by the fan motor unit 33, the water is blocked by the wall 37 and does not enter the inside of the main body.
Naturally, the length of the wall 37 is not a shape that covers the entire fan motor unit 33, but is a value determined according to the balance with the cooling performance.

With these features, the cooling of the heating coil and the electronic components inside the main body can be better performed, so that a highly reliable device can be provided. Also,
Since an efficient cooling configuration can be made, the specifications and grades of the cooling parts such as the fan motor unit can be reduced, and the fan motor unit 33 is sandwiched between the support 34 and the lid 36 as shown in FIG. Since the fan motor unit 33 can be fixed, there is no need to use screws to fix the fan motor unit 33, and an inexpensive device with a small number of parts and good workability during assembly can be provided. By providing the wall 37 on the lid 36, it is possible to more reliably prevent water from entering the inside of the main body, so that the safety of the device can be further improved.

The support may be supported in a concave shape, and the cover may be covered in a concave shape.

Embodiment 4 Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings.

In FIG. 4, reference numeral 41 denotes a heating coil; 42, a support plate for supporting the heating coil 41;
1, a fan motor unit 44 for cooling the heating coil 41 and the inverter circuit 43, a support 45 for supporting the inverter circuit 43 and the fan motor unit 44, and a cooling air suction port 46. There is a certain intake. Fan motor unit 44
Are fixed on a support 45 near the air inlet 46.
Reference numeral 47 denotes a radiating fin for fastening a heat-generating component, which is mounted on the inverter circuit 43. The support plate 42 also serves as a lid that covers at least the upper part of the fan motor unit.

Next, the operation of the fourth embodiment will be described. Normally, when the induction heating cooker is operated, the heating coil 41 inside the main body and the electronic components on the inverter circuit 43 are cooled, so that it is necessary to suck the cooling air from the intake port 46 by the rotation of the fan of the fan motor unit 44. is there. Then, it is necessary to guide the inside of the main body. In this configuration, the cooling air sucked from the fan motor unit 44 is routed by the support plate 42 above the fan motor unit 44, and is guided directly to the inverter circuit 43, so that an efficient cooling configuration is achieved. Can be formed. In the fourth embodiment, the support plate 42 covers from above the fan motor unit 44 to a position where the entire heating coil 41 is supported. Naturally, it is mounted so as to cover the radiation fins 47 to which the heat-generating components are fastened.
Therefore, the cooling air is supplied to the radiation fins 4
7, so that better cooling performance can be obtained. In addition, since the lid supporting the heating coil 41 and guiding the cooling path for improving the cooling efficiency can also be used as a single component, the number of components can be reduced.

With these features, the cooling of the heating coil and the electronic components inside the main body can be better performed, so that a highly reliable device can be provided. Also,
Since an efficient cooling configuration can be made, the specifications and grades of cooling parts such as a fan motor unit can be reduced, and the support plate 42 and the support 45 as shown in FIG.
Since the fan motor unit 44 can be fixed by sandwiching the same, there is no need to use screws for fixing the fan motor unit 44, and it is possible to provide an inexpensive device with a small number of parts and good workability during assembly. it can.

The support may be supported in a concave shape, and the lid may be covered in a concave shape.

Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

In FIG. 5, reference numeral 51 denotes a heating coil; 52, an inverter circuit for driving the heating coil 51; 53, a support bottom plate for supporting the heating coil 51 or the inverter circuit 52; A wall located on the exhaust side, 55 is an opening provided in the support bottom plate 53, and 56 is a fan motor unit for cooling the heating coil 51 and the inverter circuit 52. In the support bottom plate 53, the height of the wall 54 is higher than the height of the lower surface of the heating coil 51, and there is an opening 55 between the wall 54 and the end surface of the heating coil 51 in the wall direction. The cooling air that has cooled the inverter circuit 52 passes through the opening 55 and flows in the opposite direction through the wall 54 to cool the heating coil 51. The support bottom plate 53 is provided with a fan motor unit 56.
, And also plays a role of guiding cooling air to the inverter circuit 52. Reference numeral 57 denotes an intake port serving as a cooling air intake port.

Next, the operation of the first embodiment will be described. Normally, when the induction heating cooker is operated, the heating coil 51 inside the main body and the electronic components on the inverter circuit 52 are cooled, so that it is necessary to suck the cooling air from the intake port 57 by the rotation of the fan of the fan motor unit 56. is there. The cooling air sucked thereby cools the inverter circuit 52 efficiently. Thereafter, the cooling air passes through the inside of the support bottom plate 53 and hits a wall 54 located on the exhaust side with respect to the fan motor unit 56 of the support bottom plate 53. However, since the support bottom plate 53 has an opening 55 between the wall 54 and the end face of the heating coil 51 in the direction of the wall 54, the cooling air flows through the opening 55. In addition, since the height of the wall 54 of the supporting bottom plate 53 located on the exhaust side with respect to the fan motor unit 56 is higher than the height of the lower surface of the heating coil 51, the cooling air flows toward the heating coil 51, and It is exhausted from behind. Therefore, a cooling configuration that can efficiently cool the inverter circuit 52 and the heating coil 51 can be formed.

[0030] Because of these, the cooling of the heating coil and the electronic components inside the main body can be better performed, so that a highly reliable device can be provided. Also,
Since an efficient cooling configuration can be made, the specifications and grades of the cooling components such as the fan motor unit can be reduced. In addition, since the support bottom plate and the lid can be constituted by one component, an inexpensive device with reduced number of components and good assemblability can be provided.

Reference Example 5 Hereinafter, a fifth reference example of the present invention will be described with reference to the drawings.

In FIG. 6, reference numeral 61 denotes a heating coil; 62, a support plate for supporting the heating coil 61;
1 is an inverter circuit for driving 1, 64 is an inverter circuit 6
An aluminum concave lid 65 having an opening at the front, rear and lower sides of the cover 2, and a fan motor unit 65 for cooling the heating coil 61 and the inverter circuit 62.
An inverter circuit 63 is provided in the aluminum concave lid 64.
The upper heat generating component 66 is fastened. Reference numeral 67 denotes an intake port serving as a cooling air intake port.

Next, the operation of the fifth embodiment will be described. Normally, when the induction heating cooker is operated, the heating coil 61 inside the main body and the electronic components on the inverter circuit 63 are cooled, so that it is necessary to suck the cooling air from the air inlet 67 by the rotation of the fan of the fan motor unit 65. is there. The cooling air sucked thereby passes through the inside of the aluminum-made concave lid 65 and passes through the inverter circuit 63.
To cool. In addition, the heat-generating component 66 of the inverter circuit 63, which generates a large amount of heat, is fastened to the aluminum-made concave lid 64, which has an excellent heat-dissipating property, so that the heat-dissipating component is more efficiently dissipated and the cooling performance is improved. Can be demonstrated. In addition, since it is not necessary to use the extrusion radiator fins that have been widely used in the past, the configuration can be made very light, and the radiator fin and the lid can be combined into one component. The score can also be reduced.

With these features, the cooling of the heating coil and the electronic components inside the main body can be better performed, so that a highly reliable device can be provided. Also,
Since an efficient cooling configuration can be made, the specifications and grades of the cooling parts such as the fan motor unit can be reduced, and in addition, the number of parts can be reduced, so that it is inexpensive and easy to assemble. Good equipment can be provided.

Further, since the aluminum-made concave lid is located below the heating coil, the lines of magnetic force generated by the heating coil are absorbed by the aluminum-made concave lid, and radiation noise can be reduced.

[0036]

【The invention's effect】

According to the first aspect of the present invention, in the support bottom plate, the height of the wall located on the exhaust side with respect to the fan motor unit is located above the lower surface of the heating coil, and the wall and the heating coil By having an opening between the end face in the wall direction and directing the cooling air to the heat-generating components inside the main body, the cooling coil can be efficiently used after cooling the inverter circuit. Since cooling can be performed, the reliability of the device can be improved. Also,
Since the support bottom plate and the lid can be constituted by one component, a low-cost device with good assemblability that can reduce the number of components can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an induction cooking device showing a first embodiment of the present invention.

FIG. 2 is a sectional view of an induction heating cooker according to a second embodiment of the present invention.

FIG. 3 is a sectional view of an induction heating cooker according to a third embodiment of the present invention.

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

FIG. 5 is a cross-sectional view of the induction heating cooker according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional view of an induction heating cooker according to a fifth embodiment of the present invention.

FIG. 7 is a detailed view of a heat-generating part fastening portion showing a fifth embodiment of the present invention.

FIG. 8 is a sectional view of a conventional induction heating cooker.

[Explanation of symbols]

11, 21, 31, 41, 51, 61 Heating coil 12, 22, 32, 43, 52, 63 Inverter circuit 13, 23, 33, 44, 56, 65 Fan motor unit 14, 24, 34, 45, 54, 65 Support 15, 25 Bottom supporting fan motor unit 16, 26 Bottom located on suction side of fan motor unit 27 Hole 35 Inlet 36 Cover 37, 54 Wall 42, 62 Support plate 53 Support bottom plate 55 Opening 64 Aluminum Concave lid 66 Heating parts

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hirofumi Nakakura 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Katsuyuki Aihara 1006 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. AD35 CD43

Claims (1)

[Claims] 1. A heating coil, an inverter circuit for driving the heating coil, a support bottom plate for supporting at least the heating coil, a fan motor unit for cooling the heating coil and the inverter circuit, And a wall positioned on the exhaust side, wherein the upper surface of the wall is located above the lower surface of the heating coil, and an opening is provided between the wall and the heating coil, and cooling air from the opening is provided. Is flowed in the opposite direction by the wall.