JP2010218783A - Induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a kitchen built-in type induction heating cooker which can prevent damage of a kitchen itself caused by heat transfer from a body outer enclosure and deterioration of stored seasonings and cooking small articles even though there are drawers shelves for storing seasonings and cooking small articles in the vicinity of the body outer enclosure of the cooker. <P>SOLUTION: The induction heating cooker having a top plate 9 arranged on an upper surface of a body comprises a heating coil 22 in the body outer enclosure 97 located under the top plate 9, a base board 51 for controlling drive of the heating coil 22, and a fan device 4 for cooling the heating coil 22 and the base board 51. A duct 98 is arranged inside left and right sides and the back of the body outer enclosure 97, and a gap formed in the duct 98 is set up to be an outer enclosure cooling wind passage 80 of a cooling wind supplied from the fan device 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air cooling structure of an induction heating cooker.

  The induction heating cooker is a device that cooks using Joule heating due to eddy current generated at the bottom of the pan when magnetic lines generated by applying a high-frequency current to the heating coil pass through a metal pan (cooking pan). It is. Since this apparatus generates heat not only from the pan during heating, but also from the heating coil and the substrate that controls the heating coil, air cooling is performed using a fan device.

  A conventional air path structure of an induction heating cooker uses an axial fan, a centrifugal fan, or the like to vent air sucked from, for example, an intake port on the upper surface of the top plate to a plurality of substrates and a heating coil. In other words, the heating coil that performs induction heating generates heat due to eddy current loss and Joule loss due to the supplied high-frequency current, and the switching element that generates the high-frequency current supplied to the heating coil generates heat on the substrate. Cooling is required.

  The heat generated inside the main body is exhausted from, for example, an exhaust port at the upper rear part of the top plate, but the air passing through the ventilation path becomes high temperature due to the temperature rise, so that it is difficult for the air to stay inside the main body. It constitutes the air path. Moreover, when using the grill store | ware (roaster) provided in the main body, since internal air is heated by the heat leak of a grill store | warehouse | chamber, internal temperature inside a main body becomes easy to rise more.

  As a conventional example for controlling the flow of high-temperature air inside the main body, there is Patent Document 1 in which sealing means for suppressing the flow of cooling air into the grill is provided.

  Further, there is Patent Document 2 in which a grille is arranged in the center of the main body, and cooling air sucked from the front side of the main body is supplied to the left and right side spaces, and exhausted from the exhaust port on the top plate.

JP 2007-5109 A JP 2008-171720 A

  In recent years, as a heat source for a built-in system kitchen, there is a tendency to shift from gas to electricity and to shift from a so-called gas range to an induction heating cooker such as an IH cooking heater.

  In addition, induction heating cookers have increased the output of heating coils due to demands for shortening cooking time, etc., and the volume of the grill chamber has been increased to accommodate large-sized cooked products. Types can be used from iron pans to aluminum and copper pans.

  Therefore, the substrate that controls the heating coil is located in the surplus space next to the grill cabinet where cooking is performed with a heater, but it is necessary to increase the output of the heating coil and diversify the corresponding pans. Along with this, the number of control components for the heating coil is increased, the mounting density of the electronic substrate is high, the ventilation resistance is increased, and the heat generation density is also increased. For this reason, the air guide path from the intake port to the exhaust port of the cooling air is complicated, and high temperature air tends to stay inside.

  In addition, due to the increased mounting density and heat generation density of the electronic components inside the main unit, it becomes difficult to cool the components, so the temperature of the outer unit of the main unit increases along with the temperature of the internal electronic components and cooling air. In the heating cooker, heat is transmitted to the storage part of the kitchen, and the heat transferred to the gap between the storage part and the outer shell of the main body stays to raise the air temperature in the gap.

  For this reason, in the conventional induction heating cooker, the amount of heat transferred to the kitchen wall through the storage unit is large. For example, in a system kitchen in which the induction heating cooker is stored, seasonings, cooking accessories, etc. in the vicinity of the induction heating cooker In the case of a general kitchen configuration where drawers and shelves for storing food are arranged, the heat transferred from the outer shell of the main body damages the kitchen material itself, and adverse effects such as alteration and discoloration of stored seasonings and cooking accessories etc. There was a problem such as making it happen.

  In addition, the increase in the internal volume of the grill cabinet tends to reduce the board placement space and increase the board mounting density. Therefore, the cooling fan mounting volume is reduced, and the heating elements such as switching elements and heating are reduced. Cooling coils and other electronic components has become difficult. For this reason, the fan must be rotated at a high speed in order to flow a necessary and sufficient amount of cooling air, and a large fan power is required, and the motor noise of the fan device and the wind noise (fluid noise) of the parts are generated. Increasingly, problems such as the deterioration of the kitchen environment due to noise have occurred.

  Moreover, in patent document 1 which controls the flow of the high temperature air inside a main body, the thermal insulation case is provided in the outer periphery of a grill warehouse, the air path which flows cooling air between both is comprised, and the main body is started from the outer periphery of a grill warehouse. Cooling air is circulated to the outside, and the grill is difficult to cool by the cooling air. However, in such an air path structure, the air path for cooling the substrate and the heating coil are cooled, and heat exchange is performed. Flows into the gap between the grill cabinet and the outer shell of the main body, so the temperature of the outer shell of the main body cannot be lowered sufficiently.

  In addition, the air flowing through the air passage through the air passage described above changes the air temperature depending on the component heat caused by the heating power of the cooker, the amount of air blown from the fan, and whether or not the grill is used. It cannot be cooled below the temperature. That is, there is a drawback that it is difficult to control the air flow rate of the fan according to the thermal power, and it is difficult to suppress fan noise and the like.

  In Patent Document 2, the heat leakage of the grill cabinet is suppressed to improve the efficiency of component cooling, and the air passages are provided in the left and right gaps between the grill cabinet and the outer shell of the main body. There is an effect of suppressing heat transfer to the outer shell.

  However, since it is not cooling air along the wall surface of the main body outline, a sufficient effect for cooling the main body outline is not expected.

  In addition, since the ventilation path has a structure in which air is sucked in from the front side of the main body, when the air volume for cooling all the internal parts is sucked, the user directly touches the flow of the cooling air and easily feels uncomfortable. Therefore, in order to suppress discomfort, the amount of intake air cannot be increased, and it is difficult to flow a sufficient amount of air that can be used for cooling the components in the main body. In other words, the component cooling performance in the main body cannot be easily improved regardless of the performance of the cooling fan.

  In addition, the heat shield plate provided between the grille and the outer shell of the main body constitutes an air passage that allows the cooling air sucked from the front side to flow to the heating coil side while suppressing heat leakage from the grille. It is not intended to cool down.

  Further, in the example in which the control board is arranged in the air passage and the duct is configured, the cooling air flows without touching the wall surface of the main body outer wall, and it has no effect on the cooling of the main body outer wall which is the object of the present invention. Can not have.

  The present invention has been made to solve at least one of the above problems.

  The present invention has been made to solve the above-mentioned problems. In claim 1, a top plate is disposed on the upper surface of the outer shell of the main body, a heating coil in the outer shell of the main body below the top plate, and driving of the heating coil. And a heating device and a fan device that cools the substrate. Ducts are provided on the left and right sides of the outer shell of the main body and on the inner side of the back surface, and a gap formed in the duct is supplied from the fan device. This is an outer cooling air passage for the cooling air.

  According to a second aspect of the present invention, a grill cabinet and the substrate for cooking with an electric heater are disposed on the left and right sides below the heating coil, the fan device is disposed behind the substrate, and the rear portion of the top plate is disposed by the fan device. The cooling air sucked into the outer shell of the main body from the air inlet provided on the side is branched into the outer cooling air passage and the flow blown out to the substrate.

  In claim 3, the duct is configured by a partition plate provided with a gap between the left and right sides and the back side of the outer shell of the main body, and the gap is an outer cooling air passage for cooling air supplied from the fan device. The outer cooling air passage is connected to the fan device.

  According to a fourth aspect of the present invention, the fan device is a centrifugal fan composed of a fan motor, an impeller, and a casing.

  According to a fifth aspect of the present invention, a grill cabinet is provided in the outer shell of the main body, a fan motor for rotating a hot air fan for forcibly flowing the air in the grill cabinet is disposed on the back side of the grill cabinet, and the fan motor is disposed on the outer shell. Cooling is performed by a part of the cooling air blown from the cooling air passage.

  According to a sixth aspect of the present invention, a top plate is disposed on the upper surface of the outer shell of the main body, a heating coil in the outer shell of the main body below the top plate, a substrate for controlling the driving of the heating coil, the heating coil and the substrate are cooled. A fan device, wherein ducts are provided on the left and right sides and the back side of the outer shell of the main body, and a gap formed in the duct is used as an outer cooling air passage for cooling air supplied from the fan device, and the outer cooling air passage An outer cooling fan for supplying the cooling air is provided inside.

  According to a seventh aspect of the present invention, intake of the outer cooling fan is performed from an intake port provided on the front side of the outer shell of the main body.

  According to the first aspect of the present invention, the inner side of the outer shell of the main body serves as the wall surface of the cooling air flow path, so that the cooling air blown out from the fan device is supplied directly to the outer cooling air passage formed in the duct. The temperature of the outer shell of the main body can be lowered efficiently.

  In addition, the outer cooling air passage formed inside the outer shell of the main body is different from the air passage that cools the heating coil and the substrate that drives the heating coil, and therefore is affected by the heat generated from the heating coil and the substrate. Therefore, the heating coil and the substrate and the outer shell of the main body can be cooled separately.

  Therefore, in a kitchen incorporating an induction heating cooker, even if there are drawers or shelves for storing seasonings or small items in the vicinity, the kitchen itself is damaged or stored by the heat transferred from the outer shell of the main body, Adverse effects such as deterioration and discoloration of cooking accessories are less likely to occur.

  In addition, according to claim 2, in the induction heating cooker having a built-in grill, even if the grill is heated at a high temperature with an electric heater by configuring the outer cooling air passage, the surface temperature becomes high, The outer temperature can be kept low.

  According to the third aspect, it is possible to suppress air leakage from the clearance of the outer cooling air passage and to efficiently lower the main body outer temperature with the cooling air supplied from the fan device.

  According to the fourth aspect, the air sucked from the rotation axis direction of the fan is easily divided into both the rotation axis direction of the fan and the outer circumferential direction of the fan from the fan device, and the outer cooling air path, the substrate and the coil Since cooling air can be supplied to the main body, both the main body shell and the substrate and coil can be efficiently cooled.

  According to the fifth aspect, since the cooling air can be supplied to the rear of the grille where it is difficult to supply the cooling air by the outer cooling air passage formed along the outer shell of the main body, the hot air fan disposed at the rear of the grille, etc. The parts can be efficiently cooled.

  According to the sixth aspect, by separately providing the outer cooling fan that supplies the cooling air to the outer cooling air passage that cools the outer shell and the fan device that cools the substrate, the fan performance is adjusted for the necessary air volume respectively. Therefore, it is possible to easily control, secure the necessary minimum cooling air volume, and cool each part efficiently.

  According to the seventh aspect, the intake of the outer cooling fan that realizes the effect of the sixth aspect is provided separately from the fan device that cools the substrate, and the interference of the flow caused by the intake air between the fans is suppressed, and the fan device can be efficiently used. Inhalation can be performed.

  Further, the total air volume from the air inlet of the fan device can be suppressed, and the occurrence of fluid noise and the like can be suppressed.

  Furthermore, since only the air intake of the outer cooling fan that supplies the cooling air to the outer cooling air passage is configured by the front air inlet, the amount of the intake air can be reduced compared to the air volume of the fan device that cools the substrate and the like, which is inconvenient for the user. It can be configured with an air volume that does not give a pleasant feeling.

It is a top view of the induction heating cooking appliance of a 1st Example. It is a perspective section assembly drawing of the induction heating cooking appliance of a 1st example. It is the perspective sectional view seen from the back side of the induction heating cooking appliance of the first example. It is front sectional drawing of the induction heating cooking appliance of a 1st Example. It is an exploded assembly figure of the fan apparatus of the induction heating cooking appliance of a 1st Example. It is sectional drawing of the rotating shaft direction of the impeller in the fan apparatus of FIG. It is a perspective view of the impeller which can mold the fan apparatus. It is a perspective view of the other impeller which can mold the fan apparatus. It is side surface sectional drawing of the induction heating cooking appliance of a 1st Example. It is a top view of the induction heating cooking appliance of the structure which supplies cooling air to the back side of the grill warehouse of the induction heating cooking appliance of 1st Example. It is a top view of the induction heating cooking appliance of a 2nd Example. It is a top view of the induction heating cooking appliance of a 3rd Example. It is side surface sectional drawing whose fan apparatus of the induction heating cooking appliance of this invention is an axial flow fan. It is side surface sectional drawing of the induction heating cooking appliance whose fan apparatus of the induction heating cooking appliance of this invention is a sirocco fan.

  Hereinafter, the induction heating cooker of the present invention will be described by taking, as an example, an IH cooking heater having electromagnetic induction heating means constituted by a heating coil, an inverter circuit, and the like.

  1 to 4 show, as an example of the induction heating cooker of the present invention, right and left heating coils 22a and 22b and an electric heater 29 as three heat sources, and a three-necked pot mounted on a top plate 9 above the heat sources. This is a kitchen built-in (built-in type) IH cooking heater provided with placing portions 90a, 90b, and 90c, and provided with a grill cabinet 1 for heating the food under the top plate 9.

  FIG. 1 shows the positional relationship between the heat source (22a, 22b, 29) disposed below the top plate 9 and the substrate case 5 in which the grill cabinet 1 and the fan device 4 are housed. It is a top view of the induction heating cooker which showed the flow of the cooling air from the inlet port 9a to the exhaust port 9b permeate | transmitting components, such as the top plate 9. FIG. In the figure, the circled portion (81a) indicates the upward flow of the cooling air, and the circled portion (81b) indicates the downward flow.

  2 shows the internal structure of the main body showing the internal structure of the substrate case 5 on which the top plate 9 shown in FIG. 1 is removed and the heating coil 22 and the substrate for supplying high-frequency current to the heating coil 22 are mounted. It is a disassembled perspective sectional view.

  FIG. 3 is a perspective cross-sectional view of the fan device 4 provided in the substrate case 5 and the outer cooling air passages 80a, 80b, and 80c disposed along the outer shell 97 connected to the fan device 4 as seen from the rear side of the main body. FIG.

  In FIG. 4, a substrate case 5 containing a plurality of stages of substrates (51a, 51b, 51c) and the like is arranged on the right side in the body outline 97 below the top plate 9, and the grill 14 on the tray 13 is sandwiched on the left side. It is a front sectional view of a kitchen built-in induction heating cooker in which a grill cabinet 1 provided with an upper heater 11 and a lower heater 12 is arranged. It is stored.

  FIG. 5 is an exploded view of the fan device 4 arranged in this embodiment, and FIG. 6 is a cross-sectional view of the fan blade 31 in the rotation axis direction.

  7 and 8 are perspective views of examples of the configuration of other fan blades 31. FIG.

  FIG. 9 is a side sectional view of the right coil 22a side (substrate case 5 side) in a state where the IH cooking heater is incorporated in the kitchen.

  In the present embodiment, the pan mounting portions 90a and 90b for induction heating the cooking pot (not shown) by supplying a high frequency current to the heating coil 22 (22a and 22b) together with the grill 1 are on the right and left. The pan mounting portion 90c that is heated by the radiant heat of the electric heater (radiant heater) 29 is arranged in the center back. However, it may be an IH cooking heater provided with at least one pan mounting portion 90 that performs induction heating by the heating coil 22. That's fine.

  In the figure, a top plate 9 is disposed on the upper surface of the main body shell 97 of the IH cooking heater, and an intake port 9a and an exhaust port 9b for allowing air inside and outside the main body shell 97 to enter and exit are provided on the rear side of the top plate 9. On the upper side, an operation unit 69 for operating the cooking pan is adjusted.

  Pan mounting portions 90a and 90b are provided on the left and right sides of the front surface of the top plate 9, and a pan mounting portion 90c is provided at the center on the rear side. Heating coils 22a and 22b, Each of the electric heaters 29 is provided, and a metal pan that can be induction-heated is placed on the pan placement portions 90a and 90b, and induction heating cannot be performed, for example, an earthen pan or the like can be placed on the pan placement portion 90c for cooking. .

  On the front left side of the main body shell 97, there is an inlet for the grill cabinet 1 for grilling fish, etc., and on the right side of the front panel is an operation panel 60 for operating the cooking pan and heating the grill cabinet 1 and adjusting its heating power. The amount is displayed on the display unit 65 provided on the upper side of the operation unit 69 provided on the top plate 9.

  A plurality of (in the figure, three stages) substrates 51 (51a, 51b, 51c) on which electronic components for supplying a high-frequency current to the heating coil 22 are mounted, and electronic components 52 (52a, 52a, 52) incorporated on the substrate 51 52b, 52c) and the fan device 4 for cooling the substrate 51 and the electronic component 52 are accommodated in a substrate case 5 disposed in a space adjacent to the grill cabinet 1, and the fan device 4 is behind the substrate 51. It is arranged on the rear side in the main body outline 97. That is, the fan device 4 shown in FIG. 5 is provided behind the main body outer shell 97 with respect to the substrate 51 disposed inside the substrate case 5, and the intake portion 2 a of the casing 2 communicates with the intake port 9 a of the top plate 9. Are arranged as follows.

  The fan device 4 housed in the substrate case 5 includes a multi-stage (three-stage in the figure) outlet 20 (20a, 20b, 20c) for supplying cooling air to the substrate 51 side in the rotation axis direction, and left and right sides of the main body outer shell 97. And the connection port 19 which ventilates to the outer cooling air path 80 (80a, 80b, 80c) arrange | positioned along the inner side of a back surface is provided. In other words, the outlet 20 and the connecting port 19 of the fan device 4 are arranged so as to be turned 90 degrees left and right (orthogonal direction).

  In the present embodiment, the outer cooling air passage 80 is formed by a duct 98 arranged in a substantially U shape along the left and right inner walls of the main body outer shell 97 and the inner wall surface of the rear surface, as shown in FIG. The cooling air supplied from the connection port 19 is jetted into the gap in the outer cooling air passage 80.

  Further, as another embodiment, the outer cooling air passage 80 includes an outer cooling air passage 80b formed between the right inner wall surface of the main body outer shell 97 and the substrate case 5, the left inner wall surface of the main body outer shell 97, and the grill cabinet 1. And an outer cooling air passage 80c formed by an air passage 80c along the inner side of the back surface of the main body outer shell 97, and is supplied from the fan device 4. The left and right sides of the main body shell 97 are cooled by the wind, and the back side of the main body shell 97 is also cooled, so that the temperature rise can be suppressed.

  In this way, if the inner wall surface of the main body outer shell 97 is used as the duct 98 that forms the outer cooling air passage 80, the cooling air is in direct contact with the main body outer shell 97, and the cooling effect is enhanced. An even higher cooling effect can be obtained by providing unevenness having an effect and expanding the heat radiation area.

  Further, as another example, the duct 98 includes substantially U-shaped partition plates (not shown) along the inner wall surfaces of the left and right sides and the back surface of the main body shell 97 and the side surfaces and the back surface of the board case 5 and the grill cabinet 1. It is also possible to form the outer cooling air passage 80 by forming a gap between the partition plate and the inner wall surface of the main body outer shell 97.

  As described above, the outer cooling air passage 80 formed by the duct 98 is formed on the left and right sides of the main body outer shell 97 and on the inner side of the rear surface, and one end communicates with the fan device 4, while the other end houses the heating coil 22. The air used for cooling the outer shell 97 is communicated with the space (in the case of the right coil 22a, the gap between the top plate 9 and the substrate case 5 and in the case of the left coil 22b, the gap between the top plate 9 and the grill 1). Exhaust. Therefore, the outer cooling air passage 80 is constituted by at least the height width of the grill cabinet 1 and the substrate case 5, and the blowing holes 15 (15a, 15b) are provided on the upper surface side of the air passage.

  As shown in FIGS. 5 and 6, the fan device 4 of the present embodiment is a casing 2 that houses an impeller 3 and an impeller 3 such as a turbofan whose fan blades 31 are rearward with respect to the rotational direction 18 as shown in FIGS. The motor support 35 and the fan motor 39 are arranged so as to have the rotation axis of the fan motor 39 in the front-rear horizontal direction of the outer shell 97 of the main body. In addition, a plurality of outlets 20 (20 a, 20 b, 20 c) are arranged in the vertical direction on the motor support base 35 that becomes the substrate side wall surface of the casing 2, and the wall surface of the casing 41 that faces the motor support base 35 is bladed. The intake side of the car 3 is used.

  The number of blowout ports 20 provided on the motor support base 35 is a design parameter set for each IH cooking heater depending on the arrangement and number of substrates and components to be cooled. In this embodiment, the number and size of the blowout ports 20 are set. Do not limit.

  Further, the impeller 3 of the present embodiment has a configuration in which the fan blade 31 is sandwiched between the hub 32 and the shroud 30, but as shown in FIG. 7, if the outer diameter of the hub 32 is made smaller than the inner diameter of the shroud 30, The impeller can be easily produced by mold molding, and as shown in FIG. 8, the mold can be easily molded by using only the fan blade 31 and the hub 32. Here, although the air blowing characteristics of the respective impellers 3 are different, any impeller may be used as long as an air flow necessary for component cooling can be obtained, and any impeller causes any problem in application of the present invention. Absent.

  In the structure of the side sectional view shown in FIG. 9, the substrate 51 is stacked on the substrate case 5 in three stages (51a, 51b, 51c) in the vertical direction, and the high heat generating components 59 (59a, 59b) provided on the substrate 51 A heat sink 55 (55a, 55b) installed on the high heat generating component 59, other electronic components 52, and the like are mounted.

  The number of substrates 51 and the like of the substrate 51 stored in the substrate case 5 below the right heating coil 22a is determined by the volume of the grill cabinet 1, the number of electronic components 52 and high heat generating components 59, the amount of wiring thereof, and the like. As the number of parts 52 and 59 increases, a plurality of substrates 51 are arranged in a higher density in the space on the side of the grill cabinet 1 according to the volume shape.

  In this embodiment, the substrate 51 is configured to be stacked in three stages in the height direction of the substrate case 5, but the arrangement configuration of the substrate 51 is not limited. Moreover, the board | substrate 51 and the fan apparatus 4 do not store the board | substrate case 5, For example, the structure which provides a resin case for every board | substrate and laminates them may be sufficient.

  Here, the heating coil 22 induces an IH cooking heater that induction-heats a magnetic pan (cooking pan) such as an iron pan with a high-frequency current of about 20 kHz, and a non-magnetic pan such as an aluminum pan with a high-frequency current of, for example, 60 kHz or more. There are IH cooking heaters for heating, and the latter increases the number and volume of substrates and electronic components, increases the mounting density of the substrate case, and makes air cooling difficult. Therefore, in this embodiment, the more complicated the component mounting as in the latter case, the more advantageous is the cooling structure because the supply amount and supply position of the cooling air can be freely controlled.

  In this configuration, the air sucked from the air intake portion 5a of the substrate case 5 communicating with the air intake port 9a is blown out from the air outlet 20 of the fan device 4 toward the substrate 51 and the connection port 19 of the fan device 4. A flow toward the outer cooling air passage 80 of the connected duct 98 is formed.

  First, the flow from the connection port 19 toward the outer cooling air passage 80 is a part of the air blown in the rotational circumferential direction from the impeller 31 of the fan device 4 that is a centrifugal fan. Compared with the flow toward the substrate 51 that changes its direction, the air flows smoothly into the outer cooling air passage 80 from the connection port 19.

  In the outer cooling air passage 80a extending from the fan device 4 to the right side of the substrate case 5 and the main body outer shell 97, ambient air having a low temperature sucked from the air inlet 9a of the top plate 9 flows directly through the fan device 4, so While shielding the heat | fever which generate | occur | produces from the board | substrate 51 in case 5, the main body outline 97 can be cooled directly and the temperature rise of the main body outline 97 can be suppressed.

  Similarly, the outer cooling air passage 80c arranged along the back surface of the main body outer shell 97 shields heat leakage on the rear side of the grill cabinet 1, and further, the outer cooling air passage 80b arranged along the left side of the main body outer shell 97. By shielding the heat leakage on the left side of the grill cabinet 1, the temperature rise of the main body shell 97 (three sides of the left and right and the back) housed in the kitchen can be kept low regardless of the heat source operation.

  Further, the air that has cooled the main body shell 97 flows from the blowout holes 15a and 15b of the outer shell cooling air passage 80 to the space where the heating coil 22a below the top plate 9 is disposed. It exhausts from 9b.

  That is, the flow toward the substrate 51 is separated from the air flowing through the outer cooling air passage 80, and the air supplied from the first-stage outlet 20a of the fan device 4 is the first-stage substrate 51a (the electronic component 52a or the high heat-generating component). 59a) is cooled and the air supplied from the second stage outlet 20b cools the second stage substrate 51b (electronic component 52b and high heat generating part 59b), and the air supplied from the third stage outlet 20c is The third-stage substrate 51c (electronic component 52c) is cooled respectively.

  The air that has cooled the substrate 51 of the substrate case 5 enters the ventilation duct 7 provided above the substrate case 5, that is, below the left and right heating coils 22 a and 22 b, and enters the lower surface of the heating coil 22 from the opening 7 a of the duct 7. Composing the heading flow.

  The air that has cooled the left and right heating coils 22 flows toward the back of the main body through the space where the heating coils 22 below the top plate 9 are arranged, and is exhausted from the exhaust port 9b.

  Further, a structure (not shown) for forcibly exhausting hot air in the grill cabinet 1 may be provided on the back side of the grill cabinet 1.

  FIG. 10 shows an example in which the present embodiment is applied to a configuration in which a hot air fan 18 is disposed on the back side of the grill cabinet 1, for example, and a conventional configuration is provided via a ventilation portion 81c provided in a part of the outer cooling air passage 80c. Then, the cooling air is supplied to the back side of the grill cabinet 1 such as the hot air fan 18 which is difficult to supply the cooling air. If it is this structure, all the components provided in the back surface of the grill warehouse 1, such as these hot air fans 18, can also be easily performed using some air of the outer cooling air path 80c.

  The operation of the IH cooking heater according to the first embodiment shown in FIGS. 1 to 9 having the above-described configuration will be described by taking as an example the case where the cooking pan is placed on the right pan placing portion 90 a on the top plate 9. To do.

  For heating the cooking pan placed in the pan placing portion 90a on the top plate 9 and containing a liquid such as water, the power switch 60b of the operation panel 60 provided in front of the main body is turned on, and the operation panel 60 is operated. The operation is started by the dial 60a or the operation unit 69 on the front side of the top plate 9. These operation states are displayed on the display unit 65, and heating control according to the heating power adjustment amount is performed.

  In other words, the heating coil 22a located below the cooking pan is controlled to supply a high-frequency current according to the heating power adjusted according to the operation state, and induction heating of the cooking pan is performed while adjusting the heating power. Can do.

  Further, at the same time as the current flows through the heating coil 22a, the fan device 4 operates and sucks the cooling air from the intake portion 5a of the substrate case 5 located below the intake port 9a, and is disposed inside the substrate case 5. The air is sucked into 4.

  When the cooking pan is induction-heated by the heating coil 20a, the heating efficiency depends on the material of the cooking pan, and the heat loss is high heating component 59a on the right heating coil 20a and the first substrate 51a and other electronic components. The component 52a and the heat generated by the electronic component 52c on the third-stage board 51c increase the temperature of each component.

  Therefore, the high heat-generating component 59a that generates a large amount of heat is fixed to the heat sink 55 that has a large heat radiation area, and the generated heat is cooled by the air blown out from the fan device 4. In other words, the air blown out from the fan device 4 flows toward the circuit board 51 arranged in three stages in the height direction of the main body outer shell 97, and the respective gaps are formed in the main body so as to cool the electronic components 52a and 59a on the board 51. It flows from the back side of the outer shell 97 toward the front side.

  Here, the fan device 4 may control the air volume stepwise or steplessly according to the heating adjustment amount in advance, or by measuring the temperature of the heating coil 22a and the high heat generating component 59a, by ON / OFF control or intermittent operation. You may make it the structure which adjusts air volume.

  The air that has cooled the substrate 51 enters the ventilation duct 7 disposed above the substrate case 5, and supplies the cooling air to the left and right heating coils 22 from the opening 7 a below the coil base 21. The air that has cooled the heating coil 22 flows around the coil base 21 and is exhausted to the outside through the exhaust port 9b.

  When the cooking pan is continuously heated by the heating coil 22 for a long time, the heat generated from the substrate 51 in the substrate case 5 is transmitted to the wall surface of the substrate case 5 through the cooling air, and further the outer shell of the main body. Heat leakage occurs toward 97, and the temperature inside the main body also rises due to heat generated by the heating coil 22, and the heat increases the temperature of the main body shell 97.

  However, the heat that has risen in temperature is shielded by supplying cooling air to the outer cooling air passage 80 of the duct 98 provided on the left and right sides of the main body outer shell 97 and inside the rear surface in conjunction with the operation of the fan device 4. The amount of heat shielded by the outer cooling air passage 80 is discharged to the outside from the exhaust port 9 b through the blowout hole 15.

  Therefore, the amount of heat transmitted to the main body shell 97 is reduced, and the temperature rise of the kitchen storage unit 99 incorporating the IH cooking heater can be suppressed.

  In addition, even when an object to be cooked is placed on the grill 14 of the grill cabinet 1 and the upper heater 11 and the lower heater 12 are heated and cooked, the inside of the grill cabinet 1 becomes hot, and the temperature of the main body shell 97 from the substrate 51 side. However, according to the present embodiment, the cooling air flowing through the outer cooling air passage 80 can be efficiently shielded from heat.

  As described above, in this embodiment, the duct 98 for supplying air from the fan device 4 is provided along the left and right sides and the inner side of the back surface of the main body outline 97, and the main body outline is cooled by the cooling air passing through the outer cooling air passage 80 of the duct 98. 97 can suppress the temperature rise on the left and right wall surfaces and the back, and even if there are drawers and shelves for storing seasonings and cooking accessories provided in the vicinity of the kitchen, the kitchen material itself is heated by the heat transferred from the outer shell 97 It can be made difficult to cause adverse effects such as damage, deterioration of the stored seasonings and cooking accessories and discoloration.

  FIG. 11 shows a top view of the IH cooking heater of the second embodiment of the present invention.

  Here, in the present embodiment, the air path configuration of the substrate case 5 for cooling the substrate 51 and the arrangement of the fan device 4 are the same as those in the above embodiment, and the description thereof is omitted.

  In this embodiment, the outer cooling fan 45 that supplies the cooling air to the outer cooling air passage 80 formed by the duct 98 provided along the right and left inner walls of the main body outer shell 97 and the rear wall is used as the fan for cooling the substrate 51. Provided separately from the device 4 (two on the left and right in the figure), and further, intake of the outer cooling fan 45 is performed from an intake port (not shown, for example, lower or bottom on the front side) provided on the front side of the main body Yes.

  In this configuration, since the intake of the outer cooling fan 45 and the intake of the fan device 4 that cools the substrate 51 are separated, interference of the flow due to the intake of the fans is suppressed, and the intake of the fan device 4 is efficiently performed. Can do.

  Therefore, the total air volume from the air inlet 9a of the fan device 4 can be suppressed, and the occurrence of fluid noise and the like can be suppressed. Further, since only the intake air of the outer cooling fan 45 that supplies the cooling air to the outer cooling air passage 80 is constituted by the front intake port, the intake air amount can be reduced compared with the air amount of the fan device 4 that cools the substrate and the like. It can be configured with an air volume that does not cause user discomfort.

  In other words, it is possible to easily control the air flow required for each fan device 4 and the outer cooling fan 45 by adjusting the fan performance, and to secure the minimum required cooling air flow for each, and efficiently cool each part. it can.

  FIG. 12 to FIG. 14 show the induction heating cooker of the third embodiment. FIG. 12 is a top view of the induction heating cooker using the fan device as an axial fan, and FIG. 13 is a side sectional view thereof. FIG. 14 is a side cross-sectional view of an induction heating cooker in which the fan device is a sirocco fan.

  Here, this embodiment shows the configuration of the fan device 4 applicable to the present invention, and can be applied to the present invention in the same manner as in the above embodiment except for the ventilation path from the fan device 4 to the outer cooling air passage 80. Therefore, explanation is omitted.

  In this embodiment, the fan device 4 that supplies the cooling air to the outer cooling air passage 80 arranged along the main body outer shell 97 is not directly connected to the outer cooling air passage 80, and the air blown out from the fan device 4 is divided. In this configuration, the substrate 51 and the heating coil 22 are cooled, and the main body shell 97 is cooled.

  With this configuration, even if the fan device is an axial fan as shown in FIG. 13 or a sirocco fan as shown in FIG. 14, the flow is branched to the outer cooling air passage 80 upstream of the substrate 51. Just do it. With this configuration, the substrate case 5 in which the fan device 4 is housed also becomes a part of the fan device, and the cooling air blown from the impeller of the axial fan or the sirocco fan is supplied to the outer cooling air passage 80. And the temperature rise of the kitchen storage part 99 can be suppressed similarly to the said Example.

DESCRIPTION OF SYMBOLS 1 Grill warehouse 2,41 Casing 3 Impeller 4 Fan apparatus 5 Substrate case 7 Ventilation duct 10 Exhaust duct 15 Outlet hole 21 Coil base 22 Heating coil 23 Temperature sensor 40 Centrifugal fan 45 Outer cooling fan 80 Outer cooling air passage 97 Main body outer wall 98 duct

Claims (7)

  A top plate is disposed on the upper surface of the main body outer shell, and a heating coil, a substrate for controlling driving of the heating coil, and a fan device for cooling the heating coil are provided in the outer shell of the main body below the top plate. Incorporating a kitchen, characterized in that ducts are provided on the left and right sides of the outer shell of the main body and on the inner side of the rear surface, and a gap formed in the duct is used as an outer cooling air passage for cooling air supplied from the fan device. Cooking cooker.   A grill box for cooking with an electric heater and the substrate are arranged on the left and right below the heating coil, the fan device is arranged behind the substrate, and the fan device is provided on the rear side of the top plate. The induction heating cooker according to claim 1, wherein the cooling air sucked into the outer shell of the main body from the mouth is branched into a flow that blows off the outer cooling air passage and the substrate.   The duct is configured by a partition plate provided with a gap between the left and right sides and the back side of the outer shell of the main body, and the gap is used as an outer cooling air passage for cooling air supplied from the fan device. The induction heating cooker according to claim 1, wherein the induction heating cooker is connected to the fan device.   The induction heating cooker according to any one of claims 1 to 3, wherein the fan device is a centrifugal fan including a fan motor, an impeller, and a casing.   A grill box is provided in the outer shell of the main body, a fan motor for rotating a hot air fan for forcibly flowing the air in the grill box is disposed on the back side of the grill box, and the fan motor is blown out from the outer cooling air passage. The induction heating cooker according to any one of claims 1 to 4, wherein the induction heating cooker is cooled by a part of the cooling air.   A top plate is disposed on the upper surface of the main body outer shell, and a heating coil, a substrate for controlling driving of the heating coil, and a fan device for cooling the heating coil are provided in the outer shell of the main body below the top plate. A duct is provided on the right and left sides of the outer shell of the main body and on the inner side of the rear surface, and a gap formed in the duct is used as an outer cooling air passage for cooling air supplied from the fan device, and the cooling air is provided in the outer cooling air passage. An induction heating cooker with a built-in kitchen, which is provided with an outer cooling fan for supplying the food.   The induction heating cooker according to claim 6, wherein intake of the outer cooling fan is performed from an intake port provided on a front side of the outer shell of the main body.

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