JP2001196153A - Induction cooking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a roaster whose inside height for both-side roasting is increased and at the same time, to realize an incorporated induction heating cooking apparatus with effective cooling of inside of the apparatus and low cooling noise. SOLUTION: The low noise induction cooling apparatus comprises a roaster heating room 27 at one side of a main body 21, and operating part 29 and a heating coil 23 and a driving circuit part and a cooling fan at another side, while the cooling fan ventilates the heating coil 23 and the driving circuit part, and provides the roaster whose inside height for both side roasting is increased, and realizes an effective cooling of the driving circuit part of the main body 21 and the heating coil 23 on it, by one cooling fan.

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 incorporated in a kitchen or the like having a roaster.

[0002]

2. Description of the Related Art A conventional induction heating cooker of this type is shown in FIG.
As shown in FIG. 20, which is a cross-sectional view taken along the line AA of FIG. 19, a roaster door 2 is provided on the left front surface of the main body 1, and a heater 3, a saucer 4, and a grill 5 are provided on the ceiling inside the main body. Equipped with a roaster case 6 with one-sided roasting,
On the opposite side is an operation unit 7 for setting the output on the front of the main unit 1.
And a plurality of heating coils 8 and 9 and a plurality of printed circuit boards 10 and 1 forming a drive circuit corresponding to the heating coils 8 and 9.
1, a radiant heater 12, and a plurality of cooling fans 13, 14 corresponding to the plurality of printed boards 10, 11.
Air is blown to the heating coils 8 and 9 and the entire body 1. The power supply control devices for the roaster heater 3 and the radiant heater 12 are included in the printed circuit boards 10 and 11, respectively. With such a configuration, the plurality of heating coils are cooled by a separate fan as a set together with a printed circuit board constituting each drive circuit, so that the cooling in the main body 1 can be realized very efficiently. Met.

[0003]

However, the induction heating cooker having such a configuration has a heating coil 8 and a printed circuit board 10.
Is required to be a predetermined dimension, and the height dimension of the main body 1 for assembling into the kitchen is determined. Therefore, it is difficult to realize a wide roaster in the refrigerator due to the restriction of the height of the roaster case 6. For example, it has been difficult to provide a double-sided roaster having heaters above and below the grill.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an operation unit for setting an output on a front surface of a main body opposite to a side where a roaster of a main body is disposed, at a position behind the operation unit. A heating coil drive circuit unit and a cooling fan are provided to easily realize an induction heating cooker including a roaster that requires a large interior such as a double-sided roaster.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is characterized in that a top plate is provided on the upper surface of the main body, and a roaster is provided on one of the right and left sides of the main body. A heating source or a heating coil below the plate is provided, and a heating coil below the top plate, an operation unit for setting the output of the main body, and a driving circuit for the heating coil and the heating source are provided in a space inside the main body excluding the roaster and the upper part of the roaster. Are provided, and a cooling fan is provided, and an intake port on the opposite side to the roaster and an exhaust port on the roaster side are provided at the rear of the upper surface of the main body. By setting this configuration to the embodiment, the height of the main body is fixed for the built-in type,
It is possible to realize a roaster with a large height in the refrigerator such as double-sided baking, and at the same time, it is possible to realize an efficient cooling in the main body and, consequently, an induction heating cooker with low noise generated by a cooling fan or the like.

According to a second aspect of the present invention, a first heating coil is provided above a printed board, a second heating coil is provided above a roaster, and a plurality of heating coils are provided below the first heating coil. A partition that forms a ventilation path is provided together with the holding board of the printed circuit board, a fan is provided at the entrance of the ventilation path, and a cooling air deflector is provided near the exit of the ventilation path, and the partition has a main ventilation port on the roaster side. It is provided. By using this configuration as an embodiment, it is possible to realize a roaster having a large inside height such as double-sided baking, and at the same time, eliminate the restriction on the arrangement position of the heating coil and easily realize an induction heating cooker including a plurality of heating coils. Can be.

According to a third aspect of the present invention, in addition to the induction heating cooker according to the first or second aspect, a partition plate is provided on the center side of the roaster main body, and the upper end side of the partition plate and the end of the heat shield partition are provided. And a ventilation hole is provided at the lower part of the partition plate on the center side of the main body, and a part of the air after cooling the drive circuit unit is cooled through the ventilation hole around the roaster. By adopting this configuration as the embodiment, the temperature of the outer shell of the main body close to the roaster can be reduced.

According to a fourth aspect of the present invention, in addition to the induction heating cooker according to the first or second aspect, a partition plate is provided at the center side of the roaster main body, and the upper end side of the partition plate and the end of the heat shield partition are provided. And a ventilation hole is provided on the side surface of the main body of the heat shielding bulkhead, and a part of the wind after cooling the heating coil is cooled through the ventilation hole around the roaster. By adopting this configuration as the embodiment, it is possible to reduce the heat of the roaster reaching the heating coil and at the same time to reduce the temperature of the outer shell of the main body close to the roaster.

According to a fifth aspect of the present invention, there is provided the induction heating cooker according to the first or second aspect, further comprising:
Are provided to exhaust air after cooling the heating coil mainly from behind the main body and from the front of the main body. By adopting this configuration as the embodiment, it is possible to reduce the temperature rise of the heating coil disposed on the roaster and to enhance the cooling effect of the entire body.

According to a sixth aspect of the present invention, in addition to the induction heating cooker according to the first or second aspect, a plurality of printed circuit boards which individually constitute drive circuit units in the main body are provided near and behind the printed circuit board units. A cooling fan is provided, and a plurality of printed circuit boards are stacked in multiple layers. By adopting this configuration as the embodiment, it is possible to efficiently suck in the external air for cooling the main body, and at the same time, enhance the cooling effect of the drive circuit unit which is arranged on the opposite side to the roaster.

According to a seventh aspect of the present invention, in addition to the induction heating cooker according to the first or second aspect, a plurality of printed circuit boards which individually constitute a drive circuit in the main body are stacked in a multi-layer structure, and the front of the plurality of printed circuit boards is arranged in front of the circuit board. , A centrifugal cooling fan is disposed in the vicinity of the cooling fan. By adopting this configuration as an embodiment, it is possible to easily realize the deflection of the cooling air from the roaster side to the roaster side in the main body, and to facilitate cooling of the heating coil and the like opposite to the cooling fan.

[0012]

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG.

In the figure, a heating coil 23, a heating coil 24 as a left heating source, and a radiant heater 25 behind the heating coil 23 are provided on the upper right side of the top plate 22 on the upper surface of the main body 21. A roaster door 26 and a roaster heating chamber 27 at the back are provided on the front left side of the main body, and the inside of the roaster heating chamber 27 is provided with a saucer, a grill, and heaters on both the upper and lower sides of the grill (FIG. (Not shown) A double-sided roaster is constituted, so that the height dimension of the roaster heating chamber 27 is increased, and only the heating coil 24 is located in a limited space above the roaster heating chamber 27 via the heat shielding partition 28. It is arranged. On the front right side of the main body, the main body 21 of the cooker
Of the operation unit 29 for setting the output of the first printed circuit board 3 and the first printed circuit board 3 constituting the drive circuit of the heating coil 23 on the right side in the back
0 and a second printed circuit board 31 constituting a drive circuit for the heating coil 24 on the left side. The plurality of printed circuit boards 30 and 31 are supported by the board holding tables 32 and 33 so as to form two layers. Printed circuit board 30 and board holder 3
2. The second printed board 31 and the board holding table 33 are individually stacked as a unit. Further, a cooling fan 34 arranged in a sirocco type close to the back side and having a rotation axis orthogonal to the printed circuit boards 30 and 31.
And a motor 35 thereabove, and an intake duct 36 that covers the cooling fan 34 and the motor 35. Further, drive circuits for the radiant heater 25 and the roaster heater are formed in the printed circuit boards 30 and 31. Further, at the rear of the upper surface of the main body 21, an intake port 37 connected to the intake duct 36 and an exhaust port 38 on the opposite side of the roaster heating chamber 27 are provided. Also, the second printed circuit board 31
The upper end position of the base holder 33 as a unit is substantially the same height as the heat shield partition wall 28. As described above, the main body 21 is of a built-in type that is entirely integrated by the outer shell and supported by a kitchen or the like by the upper flange 39 of the outer shell. Further, on the roaster heating chamber 27, a heat shield partition wall 28, a support spring (not shown) for the left heating coil 24, and a relay terminal block for electrically connecting the heating coil 24 to the second printed circuit board 31. For example, only structures that are less thermally constrained and hard to break down thermally are provided. further,
When the main body 21 is viewed from above, the cooling fan 34, the first printed circuit board 30, and the second printed circuit board 31 are arranged on the sides at positions not overlapping with the roaster heating chamber 27.

Next, the operation of this embodiment will be described. Since the roaster heating chamber 27 is a double-sided grill having heaters on both upper and lower sides of the grill inside the roaster heating chamber 27, the height of the heater below the grill is at least as high as that of the heating coil 24 on the left side. The gap for arranging the above components becomes narrow, and the second circuit constituting the drive circuit of the heating coil 24 is formed.
The printed circuit board 31 cannot be disposed below the heating coil 24, and the operation unit 29 is disposed on the right side of the roaster heating chamber 27.
Is arranged in a space behind the first printed circuit board 30 in two layers. As a result, the two-layer printed circuit board 30,
The cooling air directly hits the plurality of printed circuit boards 30 and 31 with only one cooling fan 34 behind the printed circuit board 31 to efficiently cool the printed circuit boards 30 and 31 and the cooling fan 3.
4 is disposed separately from the roaster in the plane direction, so that the heat effect of the roaster can be reduced and cooling can be performed. Further, since the right heating coil 23 is disposed on the first printed circuit board 30, a part of the blowing air from the cooling fan 34 also directly cools the right heating coil 23. The cooling fan 3
4 is a sirocco type whose rotation axis is orthogonal to the printed circuit boards 30 and 31, so that the cooling balance can be easily equalized by adjusting the vertical position of the printed circuit boards 30 and 31.

As a result, it is possible to provide a roaster in which the inside height of the oven needs to be increased, that is, double-sided baking, and the printed circuit boards 30 and 31 of the heating coil drive circuit are arranged in two layers in the main body 21 with one cooling fan. By doing, the printed circuit board 30,
The required cooling portion mainly including the large current portion in 31 is concentrated at a position where the heat is hardly affected by the roaster, and the upper heating coil 23 can be cooled at the same time, so that efficient cooling can be realized. Furthermore, since the cooling fan is constituted by one, an induction heating cooker with low noise is realized. Also,
According to the configuration of the present embodiment, the height of the roaster heating chamber 27 can be increased until the roaster heating chamber 27 approaches the left heating coil 24. Therefore, since the main body 21 is of a built-in type in the kitchen, the height of the main body 21 is Even if the size is determined, it can be made as high as possible and can provide a wide and convenient roaster in the warehouse.

In this embodiment, the built-in main body 21 is used.
Is surrounded by a single united outer shell,
The cooling air can be sent to the entire inside of the main body 21 by one cooling fan. In addition, the positions of the intake port 37 and the exhaust port 38 are
The upper surface of the main body 21 prevents the temperature of the air sucked into the main body 21 from rising by about 20K even when there is something such as an oven below the main body 21 when the main body 21 is installed in the kitchen. It is possible,
The internal cooling of the main body 21 can be sufficiently achieved, and the protection device does not operate due to a rise in temperature due to hot air. Further, since the exhaust port 38 is located at the rear part of the main body 21, the exhaust heat of the main body 21 does not directly hit the user, and the flow of the cooling air in the main body becomes high as shown by the arrow in FIG. Since it flows in a substantially U-shape so as to avoid the radiant heater 25, it is possible to prevent excess heat from being taken from the radiant heater 25 that does not require cooling. In addition, since the printed circuit boards 30 and 31 are formed as a unit with the board holding tables 32 and 33, assembly and disassembly of the main body 21 can be easily performed. Further, since the upper end of the upper substrate holding table 33 and the heat shield partition wall 28 have substantially the same height, the heating coils 23, 24 are placed in the space on the right side of the roaster.
By arranging the printed circuit boards 30, 31 and the cooling fan 34, which are the driving circuits, the cooling can be intensively performed so as to blow off the heat of the roaster. In addition, since the printed circuit boards 30 and 31 are overlaid on the layers, the space between them can be blown in a duct shape, thereby increasing the cooling efficiency. In addition to the fact that the ventilation resistance around the two heating coils 23 and 24 can be made equal and the temperatures of the two heating coils 23 and 24 are easily made equal,
The members holding 3 and 24 can be shared.

In this embodiment, the number of heating coils is two and the printed circuit board has two layers. However, the present invention is not limited to this. And the other heat source may be an electrothermal type radiant heater, etc., and the same effect is obtained even if the printed circuit board has a plurality of layers for the heating coil drive circuit and another heat source drive. is there.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 4, 5 and 6. FIG.

In the drawing, a main body 41, a top plate 42, a first heating coil 43, a second heating coil 44, a radiant heater 45, a roaster door 46, a roaster heating chamber 4
7. A pan, grill, and both upper and lower heaters (not shown) in the roaster heating chamber 47
Is the same as in the first embodiment, and
The height dimension of 7 is increased, and only the heating coil 44 is disposed in a limited space above the roaster heating chamber 47 via a heat shield partition. Further, the first printed circuit board 4 constituting a drive circuit of the operation unit 48 and the first heating coil 43
9, the second printed circuit board 50, the board holding tables 51 and 52, the cooling fan 53, the motor 54, the intake duct 55, the intake port 56, and the exhaust port 57 which constitute the drive circuit of the second heating coil 44 are also the same as those in the above embodiment. This is the same configuration as in FIG.

The difference from the first embodiment is that a board cover 58 is provided so as to cover the upper first printed board 49, and a ventilation path is formed by the board holding table 51 and the board cover 58.
On the outlet side of the ventilation path, there is provided a rear wall 48a of the operation section which serves as a deflector for the cooling air, and is located at a position closer to the roaster on the left side thereof and in front of the rear end of the second heating coil 44 on the left. The difference is that a first opening 59 serving as a vent is provided and a second opening 60 serving as a right side is provided.

The operation in this configuration is as follows. The cooling air sent from the cooling fan 53 is cooled while passing through the printed circuit boards 49 and 50 each having a ventilation path.
The flow path is changed by the rear wall 48a of the operation section, and most of the flow path passes through the first opening 59 and the second opening 60 of the substrate cover 58, and the cooling air flowing out of the first opening 59 is supplied to the left second heating section. Coil 4
4, the cooling air flowing out of the second opening 60 flows so as to cool the right first heating coil 43. Left heating coil 4
4 is located at a position distant from the first opening 59 and is also affected by the heat of the roaster heating chamber 47 therebelow, so that it is necessary to increase the cooling performance more than the first heating coil 43 on the right.
Opening 59 is made larger than the second opening 60 to be the main opening. Thereby, the cooling performance of the second heating coil 44 on the left side far from the cooling fan 53 is ensured. Also,
Since the position of the first opening 59 is located before the rear end of the left second heating coil 44, most of the cooling air flowing out of the first opening 59 is transmitted to the left second heating coil 44. Since the air flows in the intersecting paths, the cooling efficiency of the left second heating coil 44 can be increased.

As described above, the effects of this embodiment are as follows.

According to the structure of this embodiment, similarly to the above embodiment, the height of the roaster heating chamber 47 can be increased to the utmost, and a wide and easy-to-use roaster in the refrigerator can be provided. Far from the cooling fan 53,
The cooling of the second heating coil 44 can be sufficiently achieved even at a position easily affected by the heat of the roaster. Further, the cooling air can be effectively sent to the second heating coil 44 on the roaster side, so that the cooling efficiency can be increased. Thus, there is no restriction on the arrangement position of the heating coil, and an induction heating cooker including a plurality of heating coils can be easily realized. Further, the first printed board 49 is covered with the board cover 58 to form a duct-shaped cooling air passage, and the cooling effect of the upper first printed board is enhanced.

(Embodiment 3) Hereinafter, Embodiment 3 of the present invention will be described with reference to FIGS.

In the figure, a main body 61, a top plate 62, heating coils 63 and 64, a radiant heater 65, a roaster door 66, a roaster heating chamber 67, and a roaster heating chamber 6 are shown.
7, a saucer 67a, a grill 67b, and a grill 6
The heaters of both the upper heater 67c and the lower heater 67d of FIG. 7b have the same configuration as in the first embodiment. Therefore, the height dimension of the roaster heating chamber 67 is set to the space required for placing the food (H shown in FIG. 7). ), And only the heating coil 64 is disposed in the space above the roaster heating chamber 67 via the heat shield case 68. The operation unit 6
9, the first printed circuit board 70 constituting the drive circuit of the heating coil 63 and the second printed circuit board constituting the drive circuit of the heating coil 64
Printed board 71, board holding bases 72, 73 cooling fan (not shown), motor (not shown), intake duct 74,
The heat shield partition 75, the intake port 76, and the exhaust port 77 have the same configuration as in the first embodiment.

The difference from the first embodiment is that the lower part of the partition plate 79 of the heat shield partition 75 and the partition plate 79 provided above the roaster heating chamber 67 and on the center side of the main body so as to cover the roaster heating chamber 67. The point is that the mouths 80 and 81 are provided.
The positions of the ventilation holes 80 and 81 are provided so that the gap between the bottom surface of the heat shield case 68 and the bottom surface of the main body 61 overlaps in the height direction.

With such a configuration, a part of the cooling air blown from the cooling fan and cooled after cooling the first printed circuit board 70 and the second printed circuit board 71 is generated by the pressure generated by the cooling fan as shown in FIG. As shown by the arrows, the heat shield case 68 of the roaster passes through the ventilation holes 80 and 81 at the lower part of the partition plate 79.
The air is blown into the gap between the roaster and the bottom of the main body 61, and is discharged from the exhaust port after cooling the bottom side of the roaster and the bottom of the main body 61. Therefore, the temperature of the bottom of the outer shell of the main body close to the roaster can be reduced. Thus, when the main body 61 is used by being incorporated into a kitchen, the bottom of the induction heating cooker main body is exposed because there is no partition plate in the kitchen when the lower door of the induction heating cooker incorporated according to the form of the kitchen is opened. In many cases, even if the bottom surface of the induction heating cooker is accidentally touched in such a case, there is no fear of burns. The number of ventilation holes of the partition plate 79 may be one, or three or more. In addition, by providing the first half of the depth dimension of the main body 61, the area flowing through the bottom surface of the heat shield case 68 of the roaster in the path to the exhaust port 77 can be increased, and the cooling effect can be enhanced.

(Embodiment 4) Hereinafter, Embodiment 4 of the present invention will be described with reference to FIGS.

In the figure, a main body 91, a top plate 92, heating coils 93 and 94, a radiant heater 95, a roaster door 96, a roaster heating chamber 97, and a roaster heating chamber 9 are shown.
7, a saucer 97a, a grill 97b, and a grill 9
The heaters of both the upper heater 97c and the lower heater 97d of 7b have the same configuration as that of the above-described embodiment. Therefore, the height dimension of the roaster heating chamber 97 is determined by the space required for placing the food (J shown in FIG. 9). ), And only the heating coil 94 is disposed in the space above the roaster heating chamber 97 via the heat shielding partition 98. The operation unit 9
9, a first printed circuit board 100 forming a drive circuit for the heating coil 93, a second printed circuit board 101 forming a drive circuit for the heating coil 94, board holding tables 102 and 103, cooling fans (not shown), and a motor ( (Not shown), the intake duct 104, the intake port 105, and the exhaust port 106 have the same configuration as in the above embodiment.

The difference from the above-described embodiment is that the heat-shielding partition 98 and the partition plate 107 are provided above the roaster heating chamber 97 and at the center of the main body so as to cover the roaster heating chamber 97.
A ventilation port 10 is provided at the front left end on the side of the main body of the heat shielding partition 98.
8 is provided. The position of the ventilation opening 108 is provided such that there is a horizontal overlap with a gap between the left side surface of the heat shield case 109 and the left outer wall of the main body 91.

With this configuration, most of the cooling air blown from the cooling fan and cooled after the printed circuit boards 100 and 101 are blown around the left heating coil 94 by the pressure generated by the cooling fan. As shown by an arrow in FIG. 9, air is blown from the ventilation port 108 at the front left end of the heat shield bulkhead 98 to the gap between the heat shield case 109 of the roaster and the front left outer wall of the main body 91, and the left side of the roaster and the main body 91 are blown. The left outer wall is cooled from the front to the back and is discharged from the rear exhaust port.
By this action, the air is sufficiently blown around the heating coil 94 above the roaster heating chamber 97 to reduce the heat of the roaster from reaching the heating coil 94, and at the same time, reduce the temperature of the left side of the outer shell of the main body close to the roaster. Can be reduced. Thus, the temperature of the heating coil 94 above the roaster heating chamber 97 can be reduced, and at the same time, the temperature of the main body 9 can be reduced.
When the unit 1 is incorporated into a kitchen and used, the temperature of the kitchen adjacent to the side of the induction heating cooker body is reduced, and the temperature of the components constituting the kitchen rises and the durability decreases. Thermal effects can be reduced.

Embodiment 5 Hereinafter, Embodiment 5 of the present invention will be described with reference to FIGS.

In the drawing, a main body 121, a top plate 122, heating coils 123 and 124,
5, roaster door 126, roaster heating chamber 127, saucer (not shown) provided inside roaster heating chamber 127, grill (not shown), upper heater (not shown) and lower heater of grill (shown in FIG. Not shown) and both heaters,
The operation unit 128, a first printed circuit board 129 forming a drive circuit of the heating coil 123, a second printed circuit board (not shown) forming a drive circuit of the heating coil 124, board holders 130 and 131, and a cooling fan 132 , A motor (not shown), and an intake duct 133 have the same configuration as in the first embodiment.

The difference from the first embodiment is that, in addition to the intake port 134 and the exhaust port 135 provided at the rear of the main body 121, an exhaust port 135 is provided at the front left side of the left heating coil 124 and above the roaster door 126. The point is that a narrower vent 136 is provided.

With this configuration, the heating coil 124
When the cooling air after cooling is discharged only from the exhaust port 135 behind the main body, the cooling air hardly reaches the left front corner of the main body away from the exhaust port 135, and the heating coil 124 on the left front is hard to be cooled. However, stagnation of the cooling wind at the left front corner of the main body is eliminated by exhausting air from the ventilation port 136 on the front left side of the main body, and the heating coil 1 farther from the cooling fan 132 is removed.
24 to reduce the temperature rise and enhance the cooling effect of the entire body. The cooling air is warmed while passing through the inside of the main body 121 and expands in volume, so that a large exhaust port area is required. However, the ventilation port 136 serves as an auxiliary exhaust port to reduce an increase in exhaust resistance, thereby reducing the main body. It enhances the cooling effect inside.

(Embodiment 6) Hereinafter, Embodiment 6 of the present invention will be described with reference to FIGS.

In the figure, a main body 141 is provided with heating coils 143 and 144 on the front and below the top plate 142 on the upper surface thereof.
And a radiant heater 145 at the rear thereof. A roaster door 146 and a roaster heating chamber 147 at the back of the roaster door 146 are provided on the front left side of the main body. The inside of the roaster heating chamber 147 is provided with a saucer, a grill, and heaters on both the upper and lower sides of the grill ( (Not shown) A double-sided roaster is configured. Therefore, the roaster heating chamber 147
The height dimension of the heating coil 144 increases, and the upper side of the roaster heating chamber 147 is placed in a limited space via a heat shield partition.
Only one is provided. An operation unit 1 for setting the output of the cooker body 141 on the front on the right side, which is on the side opposite to the roaster of the body.
48, a first printed circuit board 149 forming a driving circuit of the heating coil 143 on the right side in the back, and a second printed circuit board 15 forming a driving circuit of the heating coil 144 on the left side.
0 so as to form two horizontal layers.
52 supported. A sirocco-type cooling fan 153, a motor 154 above the sirocco-type cooling fan 153, and an intake duct 155 covering the cooling fan 153 and the motor 154 are provided in the vicinity thereof. Radiant heater 1
45 and the drive circuit of the roaster heater are printed circuit board 14
9, 150. Further, at the rear of the main body, there are provided an intake port 156 connected by an intake duct 155 and an exhaust port 157 on the opposite side.

Next, the operation of this embodiment will be described.

The lower part of the left heating coil 144 requires the height of the roaster heating chamber 147, so that the space is limited and the driving circuit cannot be provided. For this reason, the printed circuit boards 149 and 150 having two layers are arranged in the space inside the main body on the side opposite to the roaster so as to overlap the drive circuit of the right heating coil 143. In this way, a plurality of printed circuit boards 149, 1 including power semiconductors such as switching elements and rectifiers can be provided.
50 can be collected in one place, so that one cooling fan 15
By arranging 3 so as to straddle both the printed boards 149 and 150, the cooling air is diverted to the plurality of printed boards, and cooling can be performed efficiently. In this embodiment, the cooling fan 15
Although 3 is a sirocco type, other types such as an axial flow type have the same effect. Further, in this embodiment, the motor 154 is disposed on the sirocco type cooling fan 153 so as not to be exposed to the intake port side from the entrance wall of the intake duct 155 connected to the intake port 156. At the same time as efficiently sucking, even if water or foreign matter enters from the intake port 156, it easily reaches the bottom of the intake duct 155 without hitting the motor 154, and the reliability of the cooking device main body against malfunctions can be increased. . And the cooling fan 153
Since the air is sucked from both upper and lower surfaces, the air flow at the outlet of the cooling fan 153 is not biased upward or downward, so that the cooling air is easily distributed evenly to the plurality of printed circuit boards 149 and 150, and the motor 154 is sufficiently cooled. In this embodiment, the printed circuit boards 149 and 150 are arranged in two layers horizontally. However, the present invention is not limited to this.

(Embodiment 7) Hereinafter, Embodiment 7 of the present invention will be described with reference to FIGS. 16, 17 and 18.

In the figure, a main body 161, a top plate 162, 2
Heating coils 163 and 164, the gradient heater 1
65, a roaster door 166 on the left side of the main body, a roaster heating chamber 167, a tray inside the roaster heating chamber 167, a grill, both upper and lower heaters (not shown) of the grill, and an operation unit on the anti-roaster side of the main body. 168, a first printed board 169, a second printed board 170, board holders 171 and 172, an intake port 173 at the rear of the main body 161,
The exhaust port 174 has the same configuration as in the above embodiment.

The difference from the above-described embodiment is that a sirocco type cooling fan 175, a motor 176, and a fan duct 177, which are a kind of centrifugal type, are arranged in front of a plurality of printed circuit boards 169 and 170 arranged in two layers. The motor 176 is oriented horizontally, and the outlet of the fan duct 177 is arranged on the upper side of the main body toward the roaster or rearward on the roaster side.

Next, the operation of this embodiment will be described. The flow of the cooling air when the cooling fan 175 operates is drawn into the cooling fan 175 from the intake port 173 through the cooling ducts of the printed circuit boards 169 and 170 formed by the board holding tables 171 and 172. Further, the exhaust port 1 is mainly discharged from the outlet of the fan duct 177 in the roaster direction.
The air is exhausted from the main body 161 to the outside of the main body 161. In this path, since the cooling fan 175 is of a sirocco type, the cooling air passing through the printed circuit boards 169 and 170 from the intake port 173 can easily change its direction into an L shape or a U shape.
As shown by the arrow in FIG. 7, the cooling air is easily sent to the left heating coil 164 side above the roaster, and there is an effect that the air is efficiently sent from the left side of the main body to the exhaust port. In the present embodiment, the cooling fan 175 is of the sirocco type, but the present invention is not limited to this, and the same effect can be obtained even with a centrifugal fan of another type such as a turbo type.

[0044]

As described above, according to the first aspect of the invention, the roaster is provided on one side of the main body with a heating source provided through a heat shield partition, and the operation unit is provided on the opposite side of the roaster. And a heating coil, a printed circuit board that individually configures a driving circuit for the heating source and the heating coil, and a cooling fan, so that a double-sided roaster or a large space in the refrigerator is limited within a limited height dimension of the main body. At the same time as realizing an easy-to-use roaster, the heating coil and the printed circuit board of the drive circuit of the heating source and the heating coil on it are formed in the space on the opposite side of the roaster by forming layered cooling while discharging the heat of the roaster. This realizes efficient cooling with the cooling fan of the present invention, and realizes an induction heating cooker with low noise generated by the cooling fan and the like.

Further, since the built-in type main body is surrounded by one integrated outer shell, cooling air can be sent to the entire inside of the main body by one cooling fan. In addition, the intake and exhaust ports are located at the rear of the top surface of the main unit, so even if there is something that exhausts hot air such as an oven under the main unit when installed in the kitchen, the intake air temperature that sucks into the main unit instead of directly sucking in the hot air Can be prevented from rising about 20K, and the temperature rise protection device does not operate. In addition, since the exhaust port is located at the rear of the main body, the exhaust heat of the main body does not directly hit the user, and the flow of the cooling air in the main body flows in a substantially U-shape so as to avoid the high temperature radiant heater. Therefore, it is possible to prevent excess heat from being removed from the radiant heater which does not require cooling. In addition, since the two printed boards are integrated into a unit with the two board holders, assembly and disassembly of the main body can be easily performed. Further, since the upper end of the upper substrate holding base and the heat shield partition are substantially the same height, the ventilation resistance around the two heating coils can be made equal, and the temperatures of the two heating coils can be made equal.

According to the second aspect of the present invention, the roaster and the heating coil are provided on one side in the main body, and the operation unit, the driving circuit for the heating coil, and the cooling fan are provided on the opposite side to the roaster. Since the cooling fan blows the drive circuit section to the heating coil after cooling, it realizes a roaster that needs to increase the height inside the cabinet, such as double-sided baking, and at the same time, eliminates the restriction on the arrangement position of the heating coil and increases the number of heating coils. An induction heating cooker provided easily can be realized. Further, the upper printed board is covered with the board cover to form a duct-shaped cooling air passage, so that the cooling effect is enhanced.

According to the third aspect of the present invention, of the partition plates disposed around the roaster, ventilation holes are provided in the partition plate on the center side of the main body, and a part of the wind after cooling the drive circuit portion is formed by the partition plate. As the area around the roaster is cooled through the ventilation holes,
The bottom surface side of the roaster and the bottom surface of the main body are cooled, so that the temperature of the outer bottom surface of the main body close to the roaster can be reduced. Thus, depending on the configuration of the kitchen in which the main body is incorporated, if there is no partition plate at the lower part of the induction heating cooker, it is possible to eliminate the risk of a burn even if the bottom surface of the induction induction cooking device is accidentally touched.

According to the fourth aspect of the present invention, among the partition plates disposed around the roaster, a ventilation opening is provided in the partition plate on the upper side of the roaster, and a part of the wind after cooling the heating coil is passed through the partition plate. As the area around the roaster is cooled through the mouth, sufficient air is blown around the heating coil above the roaster to reduce the heat of the roaster from reaching the heating coil and, at the same time, reduce the temperature of the outer shell close to the roaster. Can be reduced. Thus, the temperature of the heating coil above the roaster can be reduced, and when the main body is incorporated in the kitchen and used, the temperature of the kitchen near the side surface of the induction heating cooker main body can be reduced.

According to the fifth aspect of the present invention, the cooling air after cooling the heating coil is mainly exhausted from the exhaust port behind the main body and mainly from the front side of the main body on the roaster side. Stagnation of the cooling air at the corners is eliminated, the temperature rise of the heating coil farther from the cooling fan is reduced, and the cooling effect of the entire inside of the main body can be enhanced.

According to the sixth aspect of the present invention, the cooling fan is disposed in the main body behind the drive circuit section, and the drive circuit section is constituted by a plurality of printed circuit boards. A plurality of printed circuit boards including power semiconductors can be integrated in one place, and one cooling fan is arranged so as to extend over a plurality of printed circuit boards, whereby cooling air can be diverted to the plurality of printed circuit boards and cooling can be performed efficiently. In addition, a sirocco-type cooling fan with a motor placed on top of it efficiently sucks the outside air for cooling the main unit, and at the same time does not easily hit the motor even if water or foreign matter enters from the intake port, and the intake duct The bottom of the cooker, and the reliability of the cooker body against malfunctions etc. can be increased. The cooling air can be easily distributed to the motor, and the motor can be sufficiently cooled.

According to the seventh aspect of the present invention, the centrifugal cooling fan is disposed in front of the printed circuit board with the shaft directed sideways, and the outlet of the fan duct is disposed on the upper side of the main body toward the roaster or rearward on the roaster side. Since the cooling fan is of a centrifugal type, the cooling air passing through the printed circuit board from the intake port can easily change its direction into an L-shape or a U-shape. After the heating coil is easily cooled, the air is efficiently blown to the exhaust port.

[Brief description of the drawings]

FIG. 1 is a perspective view of an induction heating cooker according to a first embodiment of the present invention.

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

FIG. 3 is a longitudinal side sectional view of the induction heating cooker.

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

FIG. 5 is a cutaway plan view of the induction heating cooker.

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

FIG. 7 is a vertical front sectional view of an induction heating cooker according to a third embodiment of the present invention.

FIG. 8 is a perspective view of the induction heating cooker.

FIG. 9 is a vertical front sectional view of an induction heating cooker according to a fourth embodiment of the present invention.

FIG. 10 is a perspective view of the induction heating cooker.

FIG. 11 is a perspective view of an induction heating cooker according to a fifth embodiment of the present invention.

FIG. 12 is a cutaway plan view of the induction heating cooker.

FIG. 13 is a perspective view of an induction heating cooker according to a sixth embodiment of the present invention.

FIG. 14 is a cutaway plan view of the induction heating cooker.

FIG. 15 is a vertical side sectional view of the induction heating cooker.

FIG. 16 is a perspective view of an induction heating cooker according to a seventh embodiment of the present invention.

FIG. 17 is a cutaway plan view of the induction heating cooker.

FIG. 18 is a longitudinal side sectional view of the induction heating cooker.

FIG. 19 is a perspective view of a conventional induction heating cooker.

FIG. 20 is a vertical front sectional view of the induction heating cooker.

[Explanation of symbols]

21, 41, 61, 91, 121, 141, 161 Main body 22, 42, 62, 92, 142, 162 Top plate 23, 24, 63, 64, 93, 94, 123, 12
4, 143, 144, 163, 164 Heating coil 27, 47, 67, 97, 127, 147, 167 Roaster heating chamber 29, 48, 69, 99, 148, 168 Operation part 48a, Operation part rear wall (deflection plate) 30, 49, 70, 100, 169 First printed circuit board (drive circuit section) 31, 50, 71, 101, 170 Second printed circuit board (drive circuit section) 34, 53, 132, 153, 175 Cooling fan 28 , 75, 98 Thermal barrier 37, 56, 76, 105 Inlet 38, 57, 77, 106 Outlet 43 First heating coil 44 Second heating coil 51, 52, 72, 102, 103 Substrate holder 58 Substrate cover 59 First opening 60 Second opening 79, 107 Partition plate 80, 81, 108 Vent

Continued on the front page (72) Inventor Kazuya Oguri 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Reference) 3K051 AA08 AB04 AB10 AB12 AC33 AC37 AD02 AD07 AD23 AD26 AD39 CD42 CD43

Claims (7)

[Claims] 1. A top plate is provided on an upper surface of a main body, and a roaster is provided on one of left and right sides of the main body. A heating source or a heat source is provided above the roaster and below the top plate via a heat shielding partition. A heating coil is provided, and in the space inside the main body excluding the roaster and the upper part of the roaster, a heating coil below the top plate, an operation unit for setting an output of the main body, the heating coil and the heating An induction heating cooker provided with a plurality of printed circuit boards forming a driving circuit of a power source and a cooling fan, and having an intake port and an exhaust port on the roaster side on the opposite side of the roaster on the upper surface of the main body. 2. A first heating coil is provided on an upper portion of a printed board, and a second heating coil is provided on an upper portion of a roaster, and a plurality of holding boards for the printed board are provided below the first heating coil. Claims: a partition wall forming a passage, a fan disposed at an entrance of the ventilation passage, a cooling air deflection plate provided near an exit of the ventilation passage, and a main ventilation port provided on the roaster side of the partition wall. Item 7. An induction heating cooker according to Item 1. 3. A partition plate is provided on the center side of the main body of the roaster, an upper end side of the partition plate is connected to an end of the heat shield partition, and a ventilation port is provided at a lower portion of the partition plate. The induction heating cooker according to claim 1 or 2, wherein a part of the wind is cooled around the roaster through the ventilation port. 4. A partition plate is provided on the center side of the main body of the roaster, an upper end side of the partition plate is connected to an end of the heat shielding partition, and a ventilation port is provided on a side surface of the main body of the heat shielding partition. 3. The cooling device according to claim 1, wherein a part of the cooled air is cooled around the roaster through the ventilation port.
An induction heating cooker as described. 5. An exhaust port narrower than an exhaust port at a rear portion of an upper surface of a main body is provided on a front surface of an outer shell of the main body at an upper portion of the roaster so that air after cooling of a heating coil is exhausted mainly from behind the main body and from a front portion of the main body. The induction heating cooker according to claim 1 or 2, wherein 6. A patent in which a cooling fan is disposed close to and behind a plurality of printed circuit boards constituting a driving circuit section of a heating source and a heating coil in the main body, and the plurality of printed circuit boards are stacked in multiple layers. The induction heating cooker according to claim 1. 7. A plurality of printed circuit boards which individually constitute a heating source and a heating coil drive circuit in the main body are stacked in multiple layers,
3. The induction heating cooker according to claim 1, wherein a centrifugal cooling fan is disposed in front of the cooling fan.