JP2004172137A - Induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a roaster of which the inside height for both-side roasting is necessary to be increased and at the same time, to achieve a built-in induction heating cooker with effective cooling inside of a main body of the heating cooker and a low cooling noise. <P>SOLUTION: The cooker comprises a roaster heating room 27 at one side of a main body 21, and operating part 29, a heating coil 23, 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 of which the inside height for both side roasting is increased. Then, one cooling fan achieves an efficient cooling for the driving circuit part in the main body 21 and the heating coil 23 on it, and at the same time the cooker makes a low noise. <P>COPYRIGHT: (C)2004,JPO

Description

  The present invention relates to a built-in induction heating cooker in a kitchen or the like having a roaster.

Conventionally, this type of induction heating cooker has a roaster door 2 on the left front surface of the main body 1 and a heater on the ceiling in the rear main body, as shown in FIG. 19 and FIG. A roaster case 6 having a single-sided roasting case 3 having a tray 3, a pan 4 and a grill 5. On the opposite side of the roaster door 2, an operation unit 7 for setting the output on the front surface of the main body 1, and a plurality of heating coils 8, 9 And a plurality of printed boards 10 and 11 constituting a drive circuit corresponding to the heating coils 8 and 9, a radiant heater 12, and a plurality of cooling fans 13 and 14 corresponding to the plurality of printed boards 10 and 11. A plurality of cooling fans 13 and 14 blow air to the printed circuit boards 10 and 11, the heating coils 8 and 9, and the entire main 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. (For example, see Patent Documents 1 to 5).
JP-A-3-114173 JP-A-3-114190 JP-A-5-190276 JP-A-11-354264 JP-A-11-87039

  However, in the induction heating cooker having such a configuration, the distance between the heating coil 8 and the printed circuit board 10 needs to be a predetermined dimension, and the height dimension of the main body 1 to be incorporated in a kitchen is determined. 6 makes it difficult to realize a wide roaster in the refrigerator. For example, it has been difficult to provide a double-sided roaster having heaters above and below a grill.

  In order to solve the above-mentioned problem, the present invention provides an operation unit for setting an output on the front surface of the main body opposite to the side where the roaster of the main body is arranged, and a driving circuit unit of a heating coil and a cooling fan at the back of the operation unit. Thus, an induction heating cooker having a roaster that requires a large interior such as a double-sided roaster is easily realized.

  As described above, according to the first aspect of the present invention, a roaster and a heating source provided via a heat shield partition are provided on one side in the main body, and an operation unit and a heating coil are provided on the opposite side to the roaster. Since it is equipped with a printed circuit board that individually configures the heating source and the drive circuit for the heating coil, and a cooling fan, it is possible to use a double-sided baking roaster or a roaster that is easy to use in a refrigerator with a limited height. At the same time, the heating coil and the printed circuit board of the driving circuit of the heating source and the heating coil thereabove are formed in the space on the opposite side of the roaster while discharging the heat of the roaster to form a layered cooling, and a single cooling fan is used. Efficient cooling can be realized, and an induction heating cooker with low noise generated by a cooling fan or the like can be realized.

  Also, since the built-in main body is surrounded by one integrated outer shell, a single cooling fan can send cooling air to the entire inside of the main body. 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 it is installed in the kitchen, the intake 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 part 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, the body can be easily assembled and disassembled. Further, since the upper end of the upper substrate holding base and the heat shield partition are substantially at 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 invention described in claim 2, the roaster and the heating coil are provided on one side in the main body, and the operation unit, the driving circuit unit of the heating coil, and the cooling fan are provided on the opposite side to the roaster, and the cooling fan is provided. Since the fan is used to cool the drive circuit and then blow it to the heating coil, a roaster that requires a large inside height such as double-sided baking is realized, and at the same time, there are no restrictions on the placement position of the heating coil and multiple heating coils are provided. An induction heating cooker is easily 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 invention, of the partition plates disposed around the roaster, a ventilation port is provided in the partition plate on the center side of the main body, and a part of the wind after cooling the drive circuit unit passes through the ventilation port of the partition plate. Since the periphery of the roaster is cooled, the bottom surface side of the roaster and the bottom surface of the main body are cooled, and the temperature of the outer peripheral 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 bottom 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 invention as set forth in claim 4, among the partition plates disposed around the roaster, a ventilation port 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 ventilation port of the partition plate. Cooling around the heating coil, so that 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 of the body close to the roaster. Can be. Thereby, 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 roaster side main body. The stagnation of the cooling air is eliminated, the temperature rise of the heating coil farther from the cooling fan is reduced, and the cooling effect of the entire 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, so that power semiconductors such as switching elements and rectifiers are used. A plurality of printed circuit boards including the plurality of printed circuit boards can be integrated in one place, and one cooling fan is disposed so as to extend over the plurality of printed circuit boards. In addition, a sirocco-type cooling fan with a motor mounted on it efficiently sucks the outside air of the main body cooling, and at the same time, even if water or foreign matter enters from the intake port, it does not easily hit the motor and the intake duct The bottom of the cooker and improve the reliability of the cooker body against malfunctions, etc. In addition, the one with both suctions reduces the bias of the outlet of the cooling fan outlet and reduces the number of printed circuit boards 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, it is easy to change the direction of the cooling air passing through the printed circuit board from the air inlet into an L-shape or a U-shape. After cooling easily, there is an effect that air is efficiently blown to the exhaust port.

  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, a roaster is provided on one of the left and right sides in the main body, and a heating source or a heat source below the top plate via a heat shield partition is provided above the roaster. 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 the output of the main body, and a plurality of prints forming a driving circuit of the heating coil and the heating source are provided. A substrate and a cooling fan are 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 adopting this configuration as an embodiment, the height of the main body is fixed because of the built-in type, and a roaster with a large inside height such as double-sided baking is realized, and at the same time, efficient cooling inside the main body, and eventually a cooling fan etc. It is possible to realize an induction heating cooker with low noise generated by the apparatus.

  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 printed boards are provided below the first heating coil. A partition that forms a ventilation path together with the holding stand is provided, a fan is provided at the entrance of the ventilation path, a cooling air deflection plate is provided near the exit of the ventilation path, and a main ventilation port is provided on the roaster side on the partition. It is. 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.

  In the invention according to claim 3 of the present invention, in addition to the induction heating cooker according to claim 1 or 2, a partition plate is provided on the center side of the roaster, and the upper end side of the partition plate and the end of the heat shield partition are connected. An air vent is provided in the lower part of the partition plate on the center side of the main body, and a part of the wind after cooling the drive circuit unit is cooled through the air vent through the air vent. By employing this configuration as an embodiment, the temperature of the outer shell of the main body close to the roaster can be reduced.

  The invention according to claim 4 of the present invention provides, in addition to the induction heating cooker according to claim 1 or 2, a partition plate 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 shielding partition wall. An air vent is provided on the side surface of the main body of the heat shield partition, and a part of the wind after cooling the heating coil is cooled through the air vent through the air vent. By adopting this configuration as an 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, in addition to the induction heating cooker of the first or second aspect, a second exhaust port narrower than an exhaust port at a rear portion of the upper surface of the main body is provided on the front surface of the outer periphery of the main body of the roaster. The air after cooling is exhausted 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 inside of the main 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 cooling fan is provided adjacent to the rear of a plurality of printed circuit boards individually forming drive circuit units in the main body. 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, to enhance the cooling effect of the drive circuit unit arranged and collected on the side opposite 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 individually constituting a drive circuit in the main body are stacked in a multilayer structure, and the printed circuit boards are arranged close to each other in front thereof. And a centrifugal cooling fan is provided. By adopting this configuration as the embodiment, the deflection of the cooling air from the roaster side to the roaster side in the main body can be easily realized, and the cooling of the heating coil and the like opposite to the cooling fan can be facilitated.

(Example 1)
Hereinafter, a first embodiment 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 serving 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-side roasting roaster is constituted. Therefore, 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 a heat shielding partition 28. It is arranged. An operation unit 29 for setting the output of the main body 21 of the cooking appliance on the front right side of the main body, and a first printed circuit board 30 and a driving circuit for the left side heating coil 24 which constitute a driving circuit for the heating coil 23 on the right side in the back. A plurality of printed circuit boards 30, 31 which are supported in two layers by board holders 32, 33, the first printed board 30 and the board holders 32, The printed circuit board 31 and the substrate holding table 33 are individually stacked as a unit. Further, a cooling fan 34 disposed in a sirocco-type close to the back side and having a rotation axis orthogonal to the printed circuit boards 30 and 31, a motor 35 above the cooling fan 34, an intake duct 36 covering the cooling fan 34 and the motor 35, It has. 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. Further, the upper end position of the base holder 33 which is a unit with the second printed circuit board 31 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 flange 39 at the upper part of the outer shell. Then, on the roaster heating chamber 27, a support spring (not shown) for the heat shield partition wall 28 and the left heating coil 24, and a relay terminal block for electrically connecting the heating coil 24 and the second printed circuit board 31 are provided. Only those structures that are less thermally constrained and are not easily destroyed 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 disposed on the sides of the roaster heating chamber 27 at positions not overlapping with the roaster heating chamber 27.

  Next, the operation of the present 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, at least the height dimension of the heater below the grill is increased, and the roaster heating chamber 27 is located between the heating coil 24 on the left side and the other. The second printed circuit board 31 constituting the driving circuit for the heating coil 24 cannot be disposed below the heating coil 24, and the right side of the roaster heating chamber 27 cannot be disposed. The first printed circuit board 30 and the first printed circuit board 30 are arranged in two layers in a space behind the operation unit 29. As a result, the cooling air can directly hit the plurality of printed circuit boards 30 and 31 with only one cooling fan 34 behind the two-layer printed circuit boards 30 and 31 to efficiently cool the printed circuit boards 30 and 31 and at the same time cool the printed circuit boards 30 and 31 together. Since the fan 34 is disposed separately from the roaster in the plane direction, the fan 34 can be cooled by reducing the thermal effect of the roaster. 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. Since the cooling fan 34 is of a sirocco type whose rotation axis is orthogonal to the printed circuit boards 30 and 31, 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. By arranging the printed circuit boards 30 and 31 of the heating coil drive circuit in two layers in the main body 21 with one cooling fan. The cooling required parts mainly of the large current parts in the printed circuit boards 30 and 31 are concentrated in a position where the heat is hardly affected by the roaster, and the heating coil 23 on the upper part 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. Further, 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 heating coil 24 on the left side. However, even if the size of the kitchen is determined, it can be made as high as possible, and a large and easy-to-use roaster can be provided.

  Further, in this embodiment, since the built-in main body 21 is surrounded by a single integrated outer shell, cooling air can be sent to the entire inside of the main body 21 by one cooling fan. In addition, since the positions of the intake port 37 and the exhaust port 38 are located at the rear of the upper surface of the main body 21, even when there is a device such as an oven below the main body 21 that exhausts hot air, the hot air is not directly sucked in when installed in the kitchen. Therefore, it is possible to prevent the temperature of the intake air sucked into the main body 21 from rising about 20K, sufficiently achieve the internal cooling of the main body 21, and prevent the protection device from operating due to the temperature rise due to the 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. Further, since the printed circuit boards 30 and 31 are integrated with the board holding tables 32 and 33 as a unit, assembly and disassembly of the main body 21 can be easily performed. Further, since the upper end of the upper substrate holding base 33 and the heat shield partition wall 28 are substantially the same height, the printed circuit boards 30, 31 and the cooling fan 34, which are the drive circuits for the heating coils 23, 24, are placed in the space on the right side of the roaster. Intensive cooling to blow off the heat of the roaster. In addition, since the printed circuit boards 30 and 31 are superposed on the layers, the space between them can be blown in a duct shape to increase the cooling efficiency. In addition, 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 can be easily made equal. In addition, the members holding the heating coils 23 and 24 are shared. Can be.

  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. However, the other heat source may be an electric heat type radiant heater or the like, and the same effect can be obtained even if the printed circuit board has a plurality of layers for the heating coil drive circuit and another heat source drive.

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

  In the figure, 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 47, a tray provided inside the roaster heating chamber 47, The grill and both the upper and lower heaters (not shown) of the grill are the same as those in the first embodiment. Therefore, the height of the roaster heating chamber 47 is increased, and the upper part of the roaster heating chamber 47 is heat shielded. Only the heating coil 44 is provided in a limited space via the partition. Further, the operation unit 48, a first printed circuit board 49 constituting a driving circuit of the first heating coil 43, a second printed circuit board 50 constituting a driving circuit of the second heating coil 44, and board holding tables 51, 52. The cooling fan 53, the motor 54, the intake duct 55, the intake port 56, and the exhaust port 57 have the same configuration as in the first embodiment.

  The difference from the first embodiment is that a substrate cover 58 is provided so as to cover the upper first printed circuit board 49, and a ventilation path is formed by the substrate holding table 51 and the substrate cover 58. An operation unit rear wall 48a serving as a cooling air deflector is provided, and a first ventilation port serving as a main ventilation port is provided at a position closer to the roaster and at a position before the rear end of the left second heating coil 44 on the left side thereof. The difference is that the opening 59 is provided with a second opening 60 which is subordinate to the right side.

  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, and then the flow path is changed by the rear wall 48 a of the operation unit. The cooling air flowing out of the first opening 59 through the opening 59 and the second opening 60 passes through the left second heating coil 44, and the cooling air flowing out of the second opening 60 passes through the right first heating coil 43 to cool it. The left heating coil 44 is located at a position away from the first opening 59, and is also affected by the heat of the roaster heating chamber 47 therebelow. The first 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. Further, 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 the left second heating coil 44. Since the air flows in a path intersecting with the second heating coil 44, 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 configuration of the present embodiment, similarly to the above-described embodiment, the height of the roaster heating chamber 47 can be maximized to provide a wide and easy-to-use roaster in the refrigerator. The cooling of the second heating coil 44 can be sufficiently achieved even in a position far from the position 53 and 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, and 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.

(Example 3)
Hereinafter, a third embodiment 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, a tray 67a provided in the roaster heating chamber 67, a grill 67b, and a grill 67b. The heaters of both the upper heater 67c and the lower heater 67d have the same configuration as that of the first embodiment. Therefore, the height dimension of the roaster heating chamber 67 is equal to the space (H shown in FIG. 7) necessary for placing the food. Only the heating coil 64 is provided in the space above the roaster heating chamber 67 via the heat shield case 68. In addition, the operating section 69, a first printed circuit board 70 forming a drive circuit of the heating coil 63, a second printed circuit board 71 forming a drive circuit of the heating coil 64, board holding tables 72, 73 cooling fans (not shown) ), A motor (not shown), an intake duct 74, a heat shielding partition 75, an intake port 76, and an exhaust port 77 have the same configuration as in the first embodiment.

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

  With such a configuration, 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 indicated by an arrow in FIG. 7 due to the pressure generated by the cooling fan. As described above, air is blown into the gap between the heat shield case 68 of the roaster and the bottom surface of the main body 61 from the ventilation holes 80 and 81 at the lower part of the partition plate 79, and is discharged from the exhaust port after cooling the bottom surface side of the roaster and the bottom surface of the main body 61. Therefore, the temperature of the bottom surface of the outer shell of the main body close to the roaster can be reduced. With this configuration, when the main body 61 is used in a kitchen, when the door at the bottom of the induction heating cooker incorporated in the form of the kitchen is opened, there is no partition plate in the kitchen. Although there are many such cases, even if the bottom surface of the induction heating cooker is accidentally touched in such a case, it is possible to eliminate the risk of burns. The number of ventilation holes of the partition plate 79 may be one, or three or more. Further, 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.

(Example 4)
Hereinafter, a fourth embodiment 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, a tray 97a provided in the roaster heating chamber 97, a grill 97b, and a grill 97b are shown. The heaters of both the upper heater 97c and the lower heater 97d have the same configuration as that of the above-described embodiment. Therefore, the height of the roaster heating chamber 97 is set to the space (J shown in FIG. 9) necessary for placing the food. Only the heating coil 94 is provided in the space above the roaster heating chamber 97 through the heat shielding partition 98. Further, the operation unit 99, a first printed circuit board 100 forming a drive circuit of the heating coil 93, a second printed circuit board 101 forming a drive circuit of the heating coil 94, board holding tables 102, 103 cooling fans (not shown) ), A motor (not shown), an intake duct 104, an intake port 105, and an exhaust port 106 have the same configuration as in the above embodiment.

  The difference from the above-described embodiment is the side surface of the heat-insulating partition 98 between the heat-insulating partition 98 and the partition plate 107 provided above the roaster heating chamber 97 and on the center side of the main body so as to cover the roaster heating chamber 97. This is the point that a ventilation port 108 is provided at the front left end. The position of the ventilation port 108 is provided so as to overlap the gap between the left side surface of the heat shield case 109 and the left outer wall of the main body 91 in the horizontal direction.

  With such a configuration, most of the cooling air blown from the cooling fan and cooling the printed circuit boards 100 and 101 is blown around the left heating coil 94 by the pressure generated by the cooling fan. As shown by an arrow, air is blown from the ventilation opening 108 at the front left end of the heat shield bulkhead 98 into 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 left outside of the main body 91. The 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, to reduce the temperature of the left side of the outer shell of the main body close to the roaster. Can be reduced. Thereby, the temperature of the heating coil 94 above the roaster heating chamber 97 can be reduced, and at the same time, when the main body 91 is incorporated in the kitchen and used, the temperature of the kitchen adjacent to the side surface of the induction heating cooker main body is reduced. It is possible to reduce the thermal influence of the induction heating cooker main body, that is, the temperature of the members constituting the kitchen rises and the durability decreases.

(Example 5)
Hereinafter, a fifth embodiment of the present invention will be described with reference to FIGS.

  In the figure, a main body 121, a top plate 122, heating coils 123 and 124, a radiant heater 125, a roaster door 126, a roaster heating chamber 127, a tray (not shown) provided inside the roaster heating chamber 127, and a grill (FIG. Not shown), both the upper heater (not shown) and the lower heater (not shown) of the grill, the first printed circuit board 129 constituting a drive circuit of the operation unit 128 and the heating coil 123, and heating. A second printed circuit board (not shown), a board holding stand 130, 131, a cooling fan 132, a motor (not shown), and an intake duct 133, which constitute a drive circuit of the coil 124, have the same configuration as in the first embodiment. is there.

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

  With this configuration, when the cooling air after cooling the heating coil 124 is exhausted 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 on the left front side Although it was difficult to cool the cooling coil 124, the exhaust from the ventilation port 136 on the front left side of the main body eliminated cooling air stagnation in the front left corner of the main body, and the heating coil 124 on the far side from the cooling fan 132 It is intended to reduce the temperature rise and enhance the cooling effect of the whole body. Further, the cooling air is heated 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 the increase in exhaust resistance and reduce It enhances the cooling effect inside.

(Example 6)
Hereinafter, a sixth embodiment of the present invention will be described with reference to FIGS. 13, 14, and 15. FIG.

  In the figure, a main body 141 is provided with heating coils 143 and 144 on the front and under the top plate 142 on the upper surface thereof, and a radiant heater 145 on 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, and 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. For this reason, the height dimension of the roaster heating chamber 147 is increased, and only the heating coil 144 is disposed in a limited space above the roaster heating chamber 147 via a heat shielding partition. On the right side, which is on the opposite side of the roaster side of the main body, an operation section 148 for setting the output of the cooker main body 141 on the front side, a first printed circuit board 149 constituting a drive circuit of the heating coil 143 on the right side on the back side, and heating on the left side The second printed circuit board 150 constituting the drive circuit of the coil 144 is supported by the board holding tables 151 and 152 so as to be two horizontal layers. 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. Driving circuits for the radiant heater 145 and the roaster heater are configured in printed circuit boards 149 and 150. Further, at the rear part of the main body, an intake port 156 connected by an intake duct 155 and an exhaust port 157 on the opposite side are provided.

  Next, the operation of the present embodiment will be described.

  Below the left heating coil 144, the height of the roaster heating chamber 147 is required, so that the space is limited, so that a drive circuit cannot be provided. Therefore, two layers of printed circuit boards 149 and 150 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 heating coil 143 on the right side. By doing so, a plurality of printed circuit boards 149 and 150 including power semiconductors such as switching elements and rectifiers can be integrated into one place, so that one cooling fan 153 is disposed so as to extend over both printed circuit boards 149 and 150. By doing so, the cooling air is diverted to the plurality of printed circuit boards and can be efficiently cooled. In this embodiment, the cooling fan 153 is of the sirocco type, but other types such as the axial flow type have similar effects. 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 suctioning efficiently, 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. . Since the cooling fan 153 draws in air from the upper and lower surfaces, the air flow at the outlet of the cooling fan 153 is not deviated 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 also sufficiently cooled. You. Further, in the present embodiment, the printed circuit boards 149 and 150 are arranged in two layers horizontally, but the present invention is not limited to this.

(Example 7)
Hereinafter, a seventh embodiment of the present invention will be described with reference to FIGS.

  In the figure, a main body 161, a top plate 162, two heating coils 163 and 164, a radiant heater 165, 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, and a grill Both upper and lower heaters (not shown), the operation unit 168 on the side opposite to the roaster of the main body, the first printed circuit board 169, the second printed circuit board 170, the substrate holders 171 and 172, and the suction of the rear part of the main body 161 The port 173 and the exhaust port 174 have 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 provided in front of a plurality of printed circuit boards 169 and 170 arranged in two layers. Of the fan duct 177 is disposed on the upper side of the main body toward the roaster or rearward on the roaster side.

  Next, the operation of the present 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 air inlet 173 through the cooling ducts of the printed circuit boards 169 and 170 formed by the substrate holders 171 and 172. Further, the air is mainly exhausted from the outlet of the fan duct 177 toward the roaster, and is exhausted from the exhaust port 174 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 air inlet 173 can easily change its direction into an L-shape or a U-shape. As shown in the figure, cooling air is easily sent to the left heating coil 164 side above the roaster, and there is an effect that 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 a sirocco type fan, but the present invention is not limited to this, and the same effect can be obtained by using a centrifugal fan of another type such as a turbo type.

1 is a perspective view of an induction heating cooker according to a first embodiment of the present invention. Breakdown plan view of the induction heating cooker 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. Breakdown plan view of the induction heating cooker Longitudinal side sectional view of the induction heating cooker FIG. 4 is a vertical front sectional view of an induction heating cooker according to a third embodiment of the present invention. Perspective view of the induction heating cooker 4 is a vertical front sectional view of an induction heating cooker according to a fourth embodiment of the present invention. Perspective view of the induction heating cooker A perspective view of an induction heating cooker according to a fifth embodiment of the present invention. Breakdown plan view of the induction heating cooker A perspective view of an induction heating cooker according to a sixth embodiment of the present invention. Breakdown plan view of the induction heating cooker Longitudinal side sectional view of the induction heating cooker 7 is a perspective view of an induction heating cooker according to a seventh embodiment of the present invention. Breakdown plan view of the induction heating cooker Longitudinal side sectional view of the induction heating cooker Perspective view of a conventional induction heating cooker Vertical front sectional view of the induction heating cooker

Explanation of reference numerals

21, 41, 61, 91, 121, 141, 161 Main body 22, 42, 62, 92, 142, 162 Top plate 23, 24, 63, 64, 93, 94, 123, 124, 143, 144, 163, 164 Heating coil 27, 47, 67, 97, 127, 147, 167 Roaster heating chamber 29, 48, 69, 99, 148, 168 Operation unit 48a Operation unit 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 fans 28, 75, 98 Heat shielding partitions 37, 56, 76, 105 Intake ports 38, 57, 77, 106 Exhaust ports 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 Ventilation port

Claims (7)

A top plate is provided on the upper surface of the main body, a roaster is provided on one of the left and right sides in the main body, and a heating source or a heating coil is disposed above the roaster and below the top plate via a heat shield partition. In the main body space 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, and a driving circuit of the heating coil and the heating source are provided. An induction heating cooker provided with a plurality of printed circuit boards to be formed and a cooling fan, and having an intake port and an exhaust port on the roaster side at the rear side of the upper surface of the main body opposite to the roaster. A first heating coil is provided above the printed circuit board, a second heating coil is provided above the roaster, and a partition wall is formed below the first heating coil to form a ventilation path together with a plurality of printed circuit board holders. The induction according to claim 1, wherein a fan is provided at an entrance of the ventilation path, a cooling air deflector is provided near an exit of the ventilation path, and a main ventilation port is provided on the roaster side in the partition. Heating cooker. A partition plate is provided on the center side of the roaster body, an upper end 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, and a part of wind after cooling the drive circuit unit. The induction heating cooker according to claim 1 or 2, wherein a portion around the roaster is cooled through the ventilation port. A partition plate is provided on the center side of the roaster body, the upper end side of the partition plate is connected to the end of the heat shield partition, and a ventilation port is provided on the side surface of the main body of the heat shield partition. The induction heating cooker according to claim 1 or 2, wherein a part of the roaster is cooled through the ventilation hole. An exhaust port, which is narrower than an exhaust port at the rear of the upper surface of the main body, is provided on the front surface of the outer shell of the upper part of the roaster, and the air after cooling of the heating coil is mainly exhausted from behind the main body and from the front of the main body. Or the induction heating cooker according to 2. The cooling fan is arranged in the main body in the vicinity of the rear of a plurality of printed boards constituting a drive circuit section of a heating source and a heating coil, and the plurality of printed boards are stacked in a multilayer structure. An induction heating cooker as described. 3. The induction heating cooker according to claim 1, wherein a plurality of printed circuit boards individually constituting a heating source and a heating coil drive circuit are stacked in a multilayer structure, and a centrifugal cooling fan is disposed in front of the plurality of printed circuit boards. .

Images