JP6419267B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker having a configuration for cooling a plurality of cooling objects arranged at different positions.

  There is known an induction heating cooker that induces an eddy current in a heated object such as a pan with a high-frequency magnetic flux generated by flowing a high-frequency current through a heating coil, and heats the heated object with Joule heat generated by the eddy current. In the main body casing of such an induction heating cooker, there are a plurality of heat generating components such as a heating coil and a driving device that causes high-frequency current to flow through the heating coil. Need to cool down.

  As a configuration for cooling the heat generating components in the main body casing of the induction heating cooker, a ventilation duct as a dedicated air path is provided to each of the plurality of heating coils and the control plate from the fan outlet provided inside the main body casing. The provided one has been proposed (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2003-77637 (page 5, FIG. 7)

  As in the induction heating cooker described in Patent Literature 1, when a dedicated duct that connects the fan outlet and the cooling target is provided for each cooling target, it is possible to supply cooling air to a plurality of cooling targets. However, a space for arranging a plurality of dedicated ducts in the main body casing is required, and the induction heating cooker becomes large. In addition, when a plurality of dedicated ducts are provided, the number of parts increases and the part cost increases, and assembling takes time, and the manufacturing cost further increases. Further, when a plurality of dedicated ducts are provided, the amount of air necessary for supplying cooling air to each dedicated duct increases. In addition, pressure loss occurs in each of the dedicated ducts, and for example, when the dedicated duct is branched, the pressure loss further increases. If it becomes so, since the load of an air blower will become large, a large sized air blower will be needed and downsizing of an induction heating cooking appliance will be inhibited. In addition, when the blower becomes large, power consumption and noise increase, and there arises a problem that disassembly and assembling work at the time of product maintenance becomes difficult and maintainability is lowered.

  In addition, the induction heating cooker provided with a plurality of dedicated ducts described in Patent Document 1 has a plurality of dedicated ducts arranged in the height direction and connected to the outlet of the fan case, and as the number of dedicated ducts increases, The height of the air outlet, that is, the height of the fan case is increased. Thus, when the height dimension of a fan case becomes large, an induction heating cooking appliance will also be enlarged. In addition, since the so-called built-in induction heating cooker has restrictions on the height dimension, it is difficult to increase the number of dedicated ducts. For this reason, the induction heating cooking appliance provided with the structure which can cool the cooling object arrange | positioned in several different places, without providing several dedicated ducts as described in patent document 1 was desired.

  The present invention has been made against the background of the above problems, and provides an induction heating cooker capable of cooling an object to be cooled disposed at a plurality of different locations with a simple configuration.

An induction heating cooker according to the present invention includes a main body casing, a top plate provided on an upper surface of the main body casing, a first heating coil and a second plate provided in the main body casing below the top plate. A heating coil; a driving device that drives the first heating coil and the second heating coil; a centrifugal fan; and a scroll casing that houses the fan and has an air outlet formed therein. the outlet is opened in different directions in the horizontal direction, has a first opening surface and a second opening surface which is open so as to at least partially overlap in the height direction, the second and the first opening surface member partitions the opening surface is not provided, in a plan view, the second opening surface of the outlet of the scroll casing and extending in a direction perpendicular to the second opening surface shape The second heating coil is disposed above the extended region, and the first heating coil is disposed at a position that does not overlap the extended region of the second opening surface in a plan view, and At least a part of one heating coil is disposed above an extension region formed by extending the first opening surface in a direction perpendicular to the first opening surface.

  According to the present invention, it is possible to cool the objects to be cooled arranged at a plurality of different places with the cooling air sent from the fan without providing a dedicated duct for individually blowing the cooling air.

It is a front side perspective view which shows the state by which the induction heating cooking appliance 100 which concerns on Embodiment 1 was attached to the kitchen cabinet 200. FIG. It is a front side perspective view in the state where the exhaust port cover 8 was removed from the main body housing 1 of the induction heating cooker 100 according to the first embodiment. It is a back side perspective view in the state where case top frame 5 and top plate 2 of induction heating cooking appliance 100 concerning Embodiment 1 were removed. It is a front side perspective view in the state where case top frame 5, top plate 2, first heating coil 13, second heating coil 14, and radiant heater 15 of induction heating cooking appliance 100 concerning Embodiment 1 were removed. . The rear side perspective view of the induction heating cooking appliance 100 which concerns on Embodiment 1 with the housing | casing upper frame 5, the top plate 2, the 1st heating coil 13, the 2nd heating coil 14, the radiant heater 15, and the air blower removed. It is. 3 is a rear perspective view of a substrate holding member 19 according to Embodiment 1. FIG. 2 is a top perspective view of the blower and the intake air passage partition 22 according to Embodiment 1. FIG. 3 is a bottom perspective view of the blower and the intake air passage partition 22 according to Embodiment 1. FIG. It is a top view of the state from which the exhaust port cover 8, the top plate 2, and the 2nd heating coil 14 of the induction heating cooking appliance 100 which concern on Embodiment 1 were removed. It is front sectional drawing of the state attached to the kitchen cabinet 200 of the induction heating cooking appliance 100 which concerns on Embodiment 1. FIG. It is side surface sectional drawing of the state attached to the kitchen cabinet 200 of the induction heating cooking appliance 100 which concerns on Embodiment 1. FIG. It is a back side perspective view in the state where case top frame 5 and top plate 2 of induction heating cooking appliance 100A concerning Embodiment 2 were removed. It is a front side perspective view in the state where casing upper frame 5, top plate 2, first heating coil 13, second heating coil 14, and radiant heater 15 of induction heating cooking appliance 100A concerning Embodiment 2 were removed. . 6 is a top perspective view of a blower and an intake air passage partition 22 according to Embodiment 2. FIG. It is a lower surface perspective view of the air blower and intake air passage partition 22 concerning Embodiment 2. FIG. It is a top view in the state where exhaust port cover 8, top plate 2, and the 2nd heating coil 14 of induction heating cooking appliance 100A concerning Embodiment 2 were removed. It is front sectional drawing of the state attached to the kitchen cabinet 200 of the induction heating cooking appliance 100A which concerns on Embodiment 2. FIG. It is side surface sectional drawing of the state attached to the kitchen cabinet 200 of the induction heating cooking appliance 100A which concerns on Embodiment 2. FIG. 6 is a top perspective view of a blower according to Embodiment 3. FIG. FIG. 10 is a top perspective view showing another example of a blower according to Embodiment 3.

  Hereinafter, embodiments of an induction heating cooker according to the present invention will be described with reference to the drawings. In addition, this invention is not limited by the form of drawing shown below. Further, in the following description, terms for indicating directions (for example, “up”, “down”, “right”, “left”, “front”, “back”, etc.) are used as appropriate for easy understanding. This is for explanation and these terms do not limit the present invention. Unless otherwise specified, terms indicating these directions mean directions when the induction heating cooker is viewed from the front side (front side). Moreover, in each figure, what attached | subjected the same code | symbol is the same or it corresponds, and this is common in the whole text of a specification.

Embodiment 1 FIG.
FIG. 1 is a front side perspective view showing a state in which induction heating cooker 100 according to Embodiment 1 is attached to kitchen cabinet 200. The induction heating cooker 100 according to the first embodiment is a so-called built-in type that is used in a state where the main body housing 1 is incorporated in an installation opening formed in the kitchen cabinet 200. A housing upper frame 5 is assembled to the upper portion of the main body housing 1 of the induction heating cooker 100. Each component described later is housed in an internal space formed by combining the main body housing 1 and the housing upper frame 5. A top plate 2 on which an object to be heated such as a pan is placed is fitted in the opening on the upper surface of the housing upper frame 5. As shown in FIG. 1, when the main body housing 1 is incorporated in the kitchen cabinet 200, the housing upper frame 5 and the top plate 2 are exposed from the opening formed on the top surface of the kitchen cabinet 200.

  A heating chamber 3 for performing grill heating or convection heating in the cooking chamber is provided in the main body casing 1, and the front door of the heating chamber 3 is exposed from the front opening formed on the front surface of the kitchen cabinet 200. In this embodiment, an example in which the heating chamber 3 is provided on the left side in the main body housing 1 is shown. However, the position of the heating chamber 3 is not limited to this, and is provided on the right side or the center in the main body housing 1. You can also. Moreover, the heating chamber 3 may not be provided.

  The top plate 2 provided in the opening on the upper surface of the housing upper frame 5 is made of, for example, a nonmetallic material such as heat resistant glass or ceramic. The top plate 2 is provided with three heating ports 9a, 9b, and 9c on which an object to be heated such as a pan is placed. On the front surface or the back surface of the top plate 2, a display serving as a mark for placing an object to be heated on each of the heating port 9a, the heating port 9b, and the heating port 9c is provided.

  An operation display unit is provided on the upper side of the main body casing 1 and on the front side of the top plate 2 to receive an operation input related to cooking by the user and to display information related to cooking to the user. In FIG. 1 and the subsequent drawings, the operation display unit is not shown. An operation display unit can be provided on the front surface of the main body housing 1 and on the side of the heating chamber 3.

  An exhaust port cover 8 is provided on the back side of the top plate 2. The exhaust port cover 8 is formed with an opening through which air can flow, so that the exhaust airflow can pass smoothly. By providing the exhaust port cover 8, entry of foreign matter into the housing exhaust port 7 (see FIG. 2) provided below the exhaust port cover 8 is suppressed.

  FIG. 2 is a front perspective view of the induction heating cooker 100 according to Embodiment 1 with the exhaust port cover 8 removed from the main body housing 1. The main body housing 1 is a generally box-shaped member having an upper surface opened, and forms an outer shell of the main body housing 1. A housing exhaust port 7 is formed on the left side of the rear upper surface of the housing upper frame 5 of the main housing 1, that is, on the rear side of the heating port 9 a. Below the housing exhaust port 7, an end of a heating chamber duct 18 that communicates with the inside of the heating chamber 3 and exhausts air from the heating chamber 3 is opened. 1 is exhausted from the casing exhaust port 7 to the outside.

  FIG. 3 is a rear perspective view of the induction heating cooker 100 according to Embodiment 1 with the housing upper frame 5 and the top plate 2 removed. Inside the main body housing 1, a first heating coil 13, a second heating coil 14, and a radiant heater 15 as heating sources are provided below the heating ports 9 a, 9 b, 9 c. The first heating coil 13 and the second heating coil 14 are induction heating coils that are formed by winding a winding in an annular shape and heat an object to be heated by induction heating, and the illustrated coil shape is an example. The 1st heating coil 13 and the 2nd heating coil 14 are arranged side by side, and are arrange | positioned in the position which does not overlap in front view. The radiant heater 15 heats the object to be heated by the heat generated by the resistance heating element. An induction heating coil or another heating source may be provided instead of the radiant heater 15, and the heating source of the heating port 9c is not limited. Moreover, the structure which does not provide the heating port 9c may be sufficient.

  On the upper side of the heating chamber 3 in the main body housing 1, a partition plate 10 made of a plate-like member that partitions the inside of the main body housing 1 up and down is provided. A coil 13 is placed. The partition plate 10 forms a ventilation path above and below the heating chamber 3, reduces heat transfer such as radiation from the heating chamber 3, and suppresses the first heating coil 13 from rising in temperature.

  The first heating coil 13 and the second heating coil 14 are accommodated in a generally disk-shaped coil base together with ferrite, a magnetic shield ring, and the like, and are supported from below by a plurality of heating coil support members 16 via the coil base. . Each of the plurality of heating coil support members 16 is smaller in size than the first heating coil 13 and the second heating coil 14 and differs in shape depending on the member to which the heating coil is attached, but is generally cylindrical or columnar. It is a member that functions as a part. The heating coil support member 16 is made of, for example, a metal or a synthetic resin having heat resistance. An elastic body 17 composed of a coil spring or the like is attached between the heating coil support member 16 and the coil base that supports the first heating coil 13 and the second heating coil 14. The coil base on which the first heating coil 13 and the second heating coil 14 are placed is urged upward by the elastic force of the elastic body 17, and the convex portion protruding from the upper surface of the top plate 2 is the lower surface of the top plate 2. Pressed against. With this configuration, the first heating coil 13 and the second heating coil 14 are positioned in the vertical direction with respect to the lower surface of the top plate 2.

  A housing inlet 6 is formed on the back surface of the main body housing 1. The case air intake 6 is an opening for taking in air for cooling the components in the main body case 1 into the main body case 1. In the present embodiment, the case air intake 6 includes a plurality of small air intakes 6. It consists of holes. The housing air intake 6 is preferably provided in the main body housing 1 at a position away from the housing exhaust port 7 in the left-right direction. The air sucked into the main body housing 1 is easily circulated. In the example of FIG. 3, the housing air intake 6 is provided on both the rear wall and the rear side wall of the main body housing 1, but the specific arrangement and shape of the housing air intake 6 are illustrated in the illustrated example. For example, the housing inlet 6 may be provided on the upper surface of the housing upper frame 5 or the bottom surface of the main body housing 1.

  Inside the main body casing 1, a centrifugal fan 20 and a scroll casing 40 that houses the centrifugal fan 20 are provided between the wall surface of the main body casing 1 in which the casing inlet 6 is formed and the second heating coil 14. It has been. The fan 20, the electric motor 21, which will be described later, and the scroll casing 40 may be collectively referred to as a blower. The blower sends out cooling air for cooling the components in the main body housing 1.

  A driving device 30 including an inverter that drives the first heating coil 13 and the second heating coil 14 is disposed below the second heating coil 14.

  FIG. 4 shows the front side of the induction heating cooker 100 according to the first embodiment with the upper frame 5, the top plate 2, the first heating coil 13, the second heating coil 14, and the radiant heater 15 removed. It is a perspective view. The drive device 30 includes an inverter circuit that supplies high-frequency power to the first heating coil 13 and the second heating coil 14. The drive device 30 includes a circuit board 31, an IGBT 32, a diode bridge 33, and a choke coil 34 that form an inverter circuit mounted on the circuit board 31. A heat radiating member 35 is thermally connected to the driving device 30.

  The first heating coil 13 and the second heating coil 14 are each supported by three heating coil support members 16. The three heating coil support members 16 that support the first heating coil 13 are individually engaged with the partition plate 10 with screws or the like. One of the three heating coil support members 16 that support the second heating coil 14 is engaged with the scroll casing 40 of the blower, and one of the heating coil support members 16 is a screw or the like on the side wall of the main body housing 1. The remaining one of the heating coil support members 16 is engaged with the partition plate 10 with screws or the like. As described above, the plurality of heating coil support members 16 that respectively support the first heating coil 13 and the second heating coil 14 are individually arranged, so that the first heating coil 13 and the second heating coil 14 are respectively below. A cooling effect is enhanced by forming a space so as not to obstruct the flow of cooling air.

  The three heating coil support members 16 that support the second heating coil 14 are all attached to a member other than the circuit board 31 and are attached to a position higher than the upper surface of the circuit board 31. . By not disposing the heating coil support member 16 on the mounting surface of the circuit board 31, the mounting density of the circuit board 31 is increased, and the circuit board 31 can be reduced in size and cost. In addition, by providing a plurality of heating coil support members 16, the individual heating coil support members 16 can be reduced in size, and the manufacturing cost can be reduced. Each heating coil support member 16 that supports the second heating coil 14 is attached to an individual member, and there is no need to structurally connect between the plurality of heating coil support members 16. 16 can be reduced in size, and there is little interference with the space through which the cooling air formed between the second heating coil 14 and the driving device 30 passes. For this reason, the passage of the cooling air is not hindered, and the cooling efficiency of the second heating coil 14 and the driving device 30 can be increased. Since the cooling efficiency can be increased, the load on the fan 20 is reduced, and the power consumption and noise of the fan 20 can be suppressed. Further, by not providing a member for structurally connecting the plurality of heating coil support members 16 in the space between the second heating coil 14 and the circuit board 31, the circuit board 31 to the first heating coil 13, Wiring of a power line connected to the two heating coils 14 and the radiant heater 15 and a connection line to a temperature detection means (not shown) is facilitated, and at the time of assembly, cleaning, and repair at the time of manufacturing the induction heating cooker 100 Workability can be improved. Therefore, there is an effect of reducing the manufacturing cost and maintenance cost of the induction heating cooker 100.

  In addition, when a spring formed of a wire material having high air permeability is used as the elastic body 17 attached to the heating coil support member 16, since the air permeability is not easily inhibited by the elastic body 17, the second heating coil 14 and the circuit board 31 can be further improved in air permeability, which contributes to an improvement in cooling efficiency.

  On the back side of the first heating coil 13, a first partition wall 11 is provided that partitions the space below the housing exhaust port 7 and the space below the first heating coil 13 in the front-rear direction. In the present embodiment, the first partition wall 11 is composed of a plate-like member having substantially the same width as the partition plate 10 that rises upward from the vicinity of the end portion on the back side of the partition plate 10. The first partition wall 11 is formed with a first ventilation port 12 through which air can be ventilated.

  Although not shown, a temperature sensor that directly or indirectly detects the temperature of the heat generating component mounted on the circuit board 31, the first heating coil 13, and the second heating coil 14 is provided. The detected value is input to a control circuit mounted on the circuit board 31.

  FIG. 5 shows a state where the casing upper frame 5, the top plate 2, the first heating coil 13, the second heating coil 14, the radiant heater 15, and the blower of the induction heating cooker 100 according to Embodiment 1 are removed. It is a back side perspective view. 6 is a rear perspective view of the substrate holding member 19 according to the first embodiment. As shown in FIG. 5, a substrate holding member 19 that supports the driving device 30 from below is provided in the main body housing 1 adjacent to the partition plate 10. The substrate holding member 19 supports the circuit board 31 of the driving device 30 such that the upper surface of the circuit board 31 of the driving device 30 is positioned lower than the upper surface of the partition plate 10. The substrate holding member 19 is made of an electrically insulating material such as synthetic resin.

  As shown in FIG. 6, the substrate holding member 19 includes a support surface 191 that supports the circuit board 31, an air guide surface 192 that extends obliquely upward from the support surface 191, and a plurality that extends downward from the support surface 191. Leg 193. The air guide surface 192 is a surface for guiding air from the upper surface of the circuit board 31 above the support surface 191 toward the upper surface of the partition plate 10 located higher than the upper surface of the circuit board 31, and will be described later. It contributes to the formation of cooling airflow. Note that the size of the support surface 191 is not limited as long as the support surface 191 is a surface in contact with the lower surface of the circuit board 31, and is substantially the same size as the front surface of the circuit board 31 formed across the plurality of legs 193. It may be a single flat plate surface or a surface smaller than the circuit board 31 provided on each upper surface of the leg portion 193.

  FIG. 7 is a top perspective view of the blower and the intake air passage partition 22 according to the first embodiment. FIG. 8 is a bottom perspective view of the blower and the intake air passage partition 22 according to the first embodiment. The fan 20 of the present embodiment is a sirocco fan that rotates clockwise in a top view, and is arranged such that the rotation axis is directed in the vertical direction. Instead of the sirocco fan, another centrifugal fan such as a turbo fan or a radial fan may be used, and the same operation and effect can be obtained.

  The scroll casing 40 that houses the fan 20 is made of, for example, a synthetic resin. The side wall 43 of the scroll casing 40 has a shape in which the diameter of the scroll shape gradually increases along the outer periphery of the fan 20 from the winding start portion 431 to the winding end portion 432. An air outlet 42 of the scroll casing 40 is formed on the downstream side of the air flow from the winding end portion 432. Of the side wall 43 of the scroll casing 40, a wall that curves in an R shape from the winding start portion 431 and continues to the outlet 42 is referred to as a first side wall 433, and a wall that continues from the winding end portion 432 to the outlet 42 is a second side wall 434. Called. An upper surface of the scroll casing 40 is formed in a flat plate shape, and a suction port 41 is formed on the lower surface of the scroll casing 40.

  The air outlet 42 of the scroll casing 40 has a first opening surface 421 and a second opening surface 422 that open in different directions. The first opening surface 421 is formed on the first side wall 433, the second opening surface 422 is formed between the first side wall 433 and the second side wall 434, and the first opening surface 421 and the second opening surface 422 are , Opening in a direction different by about 90 degrees. The first opening surface 421 and the second opening surface 422 only need to open in different directions in the horizontal direction, and the angle of difference in direction is not limited to 90 degrees. In the present embodiment, a partition 423 that partitions the first opening surface 421 and the second opening surface 422 and connects the upper surface and the lower surface of the scroll casing 40 is provided.

  The upper end of the first opening surface 421 coincides with the upper end of the first side wall 433, but the lower end of the first opening surface 421 is higher than the lower end of the first side wall 433. That is, the first opening surface 421 is not opened in the entire height direction of the first side wall 433, and the lower side of the first opening surface 421 is blocked by the air guide portion 44 that is a part of the side wall 43. Yes. By providing the air guide portion 44 and providing the lower end of the first opening surface 421 at a position higher than the lower end of the scroll casing 40, the air blown out from the first opening surface 421 is guided obliquely upward. The second opening surface 422 opens to the entire height of the scroll casing 40.

  A portion on the upper surface of the inner wall of the scroll casing 40 on the upstream side of the second opening surface 422 is inclined downward toward the second opening surface 422, and this portion is referred to as an inclined surface 45. The bottom surface of the scroll casing 40 facing the inclined surface 45 is generally horizontal, and the flow path cross section in the scroll casing 40 is reduced from the upstream end to the downstream end of the inclined surface 45 in the air flow direction.

  As shown in FIG. 8, an electric motor 21 that rotates the fan 20 is supported at a suction port 41 formed on the lower surface of the scroll casing 40. The rotating shaft of the electric motor 21 and the rotating shaft of the fan 20 are engaged. When the electric motor 21 operates, the rotation of the rotating shaft of the electric motor 21 is transmitted to the rotating shaft of the fan 20, and the fan 20 rotates and the cooling air flows. Is sent out.

  An intake air passage partition 22 is attached to the lower surface of the scroll casing 40 and on the outer peripheral side of the suction port 41. The intake air passage partition 22 is a member that forms an air passage between the housing intake port 6 of the main body housing 1 shown in FIG. 3 and the suction port 41 of the scroll casing 40. The upper end of the vertically extending side wall constituting the intake air passage partition wall 22 is in contact with the lower surface of the scroll casing 40. When the scroll casing 40 and the intake air passage bulkhead 22 are mounted in the main body housing 1, the lower end of the vertically extending side wall constituting the intake air passage bulkhead 22 is the left or right side surface, back surface, or bottom surface of the main body housing 1. And a generally confidential air passage is formed inside the intake air passage bulkhead 22. The side wall of the intake air passage partition wall 22 of the present embodiment has a flat plate shape extending substantially linearly in the vertical direction. By configuring the side wall in this way, the air passage formed in the intake air passage partition wall 22 is formed. The pressure loss can be reduced without bending. By reducing the pressure loss, the power consumption and noise of the blower can be reduced. The intake air passage partition wall 22 may be integrally formed with the scroll casing 40 or may be formed separately and attached to the scroll casing 40.

  FIG. 9 is a plan view of the induction heating cooker 100 according to Embodiment 1 with the exhaust port cover 8, the top plate 2, and the second heating coil 14 removed. The circuit board 31 is mounted with heat-generating components such as IGBTs 32 and diode bridges 33 that are part of components constituting an inverter circuit that drives the first heating coil 13 and the second heating coil 14. The heat dissipating member 35 is a heat sink, and is provided on the circuit board 31 by being thermally connected to heat generating components such as the IGBT 32 and the diode bridge 33. More specifically, in the present embodiment, two heat dissipating members 35 arranged in the front-rear direction are provided as a pair of left and right, that is, four heat dissipating members 35, and the left outer surface and the right outer surface of the heat dissipating member 35 are provided. On the surface, two IGBTs 32 and one diode bridge 33 are attached, respectively. The heat radiating member 35 has comb-shaped cooling fins, and when the cooling air from the blower passes between the comb-shaped cooling fins, the surface of the heat radiating member 35 can also be cooled. In the present embodiment, four heat radiating members 35 are provided, but this is a structure for providing electrical insulation by being divided into a plurality of parts. Instead of providing the plurality of heat radiating members 35, an insulating sheet may be inserted between the integral heat radiating member 35 and the circuit element for insulation.

  In a plan view, at least a part of the heat radiation member 35 of the circuit board 31 is formed in a region formed by extending the second opening surface 422 of the air outlet 42 of the scroll casing 40 in a direction orthogonal to the second opening surface 422. The heat dissipating member 35 is arranged on the downstream side of the cooling air blown out from the second opening surface 422 so as to be positioned. In the following description, a region formed by extending the second opening surface 422 in a direction orthogonal to the second opening surface 422 in plan view may be referred to as an extension region of the second opening surface 422. is there. In the present embodiment, two of the four heat radiating members 35 face the second opening surface 422, and the remaining two heat radiating members 35 are arranged further downstream of the cooling air. In addition, although the amount of heat generated varies depending on the type of circuit element, among the circuit elements mounted on the circuit board 31, the larger the amount of heat generated, the closer to the air outlet 42. The heat generation amount of the IGBT 32 is larger than that of the diode bridge 33. For example, the heat generation amount of the IGBT 32 is 1.8 times or more the heat generation amount of the diode bridge 33. In the present embodiment, the IGBT 32 and the diode bridge 33 are attached to the heat radiating member 35, but the IGBT 32 is more upstream of the cooling air than the diode bridge 33, that is, closer to the second opening surface 422 of the air outlet 42. Is arranged. The closer to the air outlet 42, the harder the diffusion of the cooling air from the gaps between the heat radiating members 35 and the like, and the higher the flow velocity. The cooling air is also low temperature. Thus, the IGBT 32 can be efficiently cooled with the cooling air having a high flow rate and a low temperature. Therefore, the air volume of the blower for cooling the IGBT 32 can be suppressed and the energy consumption can be reduced, and the rotational speed of the fan 20 can be suppressed and the noise can be reduced.

  Although not shown in FIG. 9, the second heating coil 14 is disposed above the heat radiating member 35 so as to at least partially overlap the heat radiating member 35 in a plan view. When viewed in relation to the second opening surface 422, the second heating coil 14 is arranged so that at least a part thereof overlaps with the extended region of the second opening surface 422 in plan view.

  A gap is provided between the second opening surface 422 of the air outlet 42 of the scroll casing 40 and the end of the heat radiating member 35. Further, the right end of the heat radiating member 35 is located at a position deviated outward from the right end of the second opening surface 422. That is, a part of the heat radiating member 35 is disposed at a position protruding outward from the second opening surface 422. With these configurations, the cooling air blown out from the second opening surface 422 of the air outlet 42 strikes the right end surface of the heat dissipating member 35 disposed so as to be guided to the right, and a flow toward the diagonal right is formed. The In the present embodiment, a choke coil 34, which is an example of a component mounted on the circuit board 31, is disposed on the right side of the heat radiating member 35, and the choke coil 34 is caused by an air flow directed diagonally right from the second opening surface 422. Is cooled. Since the low-temperature cooling air before passing through the heat radiating member 35 can be supplied to the choke coil 34, the choke coil 34 can be efficiently cooled. The choke coil 34 is an example of a heat generating component, and other heat generating components may be disposed at the position of the choke coil 34 illustrated.

  A gap is provided between the right end of the circuit board 31 and the inner wall on the right side of the main body housing 1 so that the cooling air from the outlet 42 can flow into the lower part of the circuit board 31 from this gap. It is configured.

  The first heating coil 13 is provided at a position that does not overlap with the extended region of the second opening surface 422 of the air outlet 42 in plan view. That is, the first heating coil 13 and the second opening surface 422 are provided in different directions in the horizontal direction.

  The first opening surface 421 of the air outlet 42 of the scroll casing 40 opens in the direction in which the first heating coil 13 is arranged so that the cooling air directed to the first heating coil 13 is blown out. In the present embodiment, specifically, a plane including the first opening surface 421 (referred to as plane 50) and a far end that is the end of the first opening surface 421 farthest from the second opening surface 422 in the horizontal direction. Assume four regions that are separated by a plane (referred to as plane 51) that passes through the edge and is perpendicular to the first opening surface 421. At least a part of the first heating coil 13 is arranged in a region (hereinafter referred to as a region 52) that is downstream of the first opening surface 421 and that faces the first opening surface 421 among the four regions. Yes. In FIG. 9, the area 52 is shaded. The cooling air from the first opening surface 421 is mainly supplied to the portion disposed in the region 52 of the first heating coil 13 so that the first heating coil 13 is efficiently cooled. On the path that linearly connects the first opening surface 421 and the first heating coil 13, the heat generating elements of the driving device 30 and the second heating coil 14 are not arranged, and the first opening surface 421. The cooling air blown from is blown to the first heating coil 13 without touching other heat generating components. By supplying the low-temperature cooling air to the first heating coil 13, the second heating coil 14 can be efficiently cooled.

  The first side wall 433 connecting the winding start portion 431 (tongue portion) of the scroll casing 40 and the first opening surface 421 is closer to the first heating coil 13 as it moves away from the winding start portion 431 and goes downstream of the cooling air. As shown in FIG. The flow path cross section of the scroll casing 40 sandwiched between the first side wall 433 and the second side wall 434 is enlarged toward the downstream side of the cooling air. Since the winding start portion 431 side of the scroll casing 40 has a negative pressure and the cooling air flows along the first side wall 433, the cooling air blown out from the first opening surface 421 is the first heating coil 13 in the horizontal direction. There will be a flow toward the left side. For this reason, even if the first heating coil 13 is not necessarily arranged in a region where the first opening surface 421 is extended in a direction orthogonal to the first opening surface 421, the cooling air blown from the first opening surface 421 is supplied to the first heating coil 13. The first heating coil 13 can be efficiently cooled. Therefore, the power consumption and noise of the blower can be reduced.

  In the present embodiment, the opening area of the second opening surface 422 of the outlet 42 is larger than the opening area of the first opening surface 421, and the amount of cooling air flowing out from the second opening surface 422 is the first opening surface. It is larger than the amount of cooling air flowing out from 421. Since the amount of heat generated by the components constituting the driving device 30 mounted on the circuit board 31 is larger than the amount of heat generated by the first heating coil 13, the opening of the second opening surface 422 that mainly supplies cooling air to the circuit board 31. The drive device 30 mounted on the circuit board 31 can be appropriately cooled by increasing the area and increasing the air volume. In the present embodiment, the opening area of the first opening surface 421 on the projection surface parallel to the first opening surface 421 is ½ of the opening area of the second opening surface 422 on the projection surface parallel to the second opening surface 422. It can be set to 1/10. By doing so, a well-balanced cooling can be performed.

  The housing exhaust port 7 of the main body housing 1 is a rectangle that is long in the left-right direction of the main body housing 1 and is arranged so that the opening area on the left side of the main body housing 1 is wider than the opening area on the right side. Has been. In plan view, the housing exhaust port 7 is arranged so that at least a portion thereof overlaps the range of the extended line of the outer width of the first heating coil 13. Of the opening area of the housing exhaust port 7, the area of the portion overlapping the range of the extension line of the outer width of the first heating coil 13 is the area of the portion not overlapping the range of the extension line of the outer width of the first heating coil 13. Bigger than.

  FIG. 10 is a front sectional view of the induction heating cooker 100 according to Embodiment 1 attached to the kitchen cabinet 200. FIG. 10 shows a view cut by a cross section passing through the first opening surface 421 of the air outlet 42 of the scroll casing 40. The upper surface of the partition plate 10 is higher than the upper surface of the circuit board 31, and there is a step between the two. Thus, due to the step between the upper surface of the partition plate 10 and the upper surface of the circuit board 31, the cooling air flowing through the circuit board surface of the circuit board 31 is guided upward, and the first heating coil 13 on the partition board 10. It becomes easy for the cooling air to come into contact with the air, and the cooling efficiency of the first heating coil 13 can be increased. Furthermore, in this embodiment, an air guide surface 192 that connects the upper surface of the partition plate 10 and the upper surface of the support surface 191 of the substrate holding member 19 is provided. The air guide surface 192 is an inclined surface that becomes higher toward the upper surface of the partition plate 10, and is cooled from the upper surface of the circuit board 31 placed on the support surface 191 of the substrate holding member 19 toward the partition plate 10. The wind can be rectified, and the cooling efficiency of the first heating coil 13 can be further increased.

  The first opening surface 421 and the second opening surface 422 of the air outlet 42 of the scroll casing 40 both open above the board surface of the circuit board 31 and below the second heating coil 14. ing. The cooling air from the air outlet 42 can cool both the components mounted on the circuit board 31 and the heat generating components of the second heating coil 14, so that the cooling efficiency is good.

  Further, on the outside of the right side wall of the heating chamber 3, a second partition wall 23 made of a plate-like member standing along the side wall of the heating chamber 3 is provided. A second ventilation port 24, which is an opening through which air can be ventilated, is formed below the second partition wall 23. At least a part of the second vent 24 provided in the second partition wall 23 overlaps the gap between the lower surface of the heating chamber 3 and the bottom surface of the main body housing 1, and the second partition wall 23 and the heating chamber 3 A gap that allows ventilation is also provided between the outer wall and the outside wall. For this reason, the cooling air flowing under the circuit board 31 passes through the second ventilation port 24 of the second partition wall 23 and flows into the space below the heating chamber 3. Since the flow of the cooling air from the second ventilation port 24 to the lower side of the heating chamber 3 is formed, the contact of the cooling air to the side wall of the heating chamber 3 is suppressed, and the decrease in the heating efficiency in the heating chamber 3 is suppressed. However, the temperature rise of the bottom surface of the main body housing 1 below the heating chamber 3 can be suppressed. Since the temperature rise of the bottom surface of the main body housing 1 is suppressed, deterioration of the kitchen cabinet 200 and deterioration due to temperature rise of stored items such as food stored near the kitchen cabinet 200 can be suppressed.

  FIG. 11 is a side cross-sectional view of the induction heating cooker 100 according to Embodiment 1 attached to the kitchen cabinet 200. FIG. 11 shows a view cut by a cross section passing through the second opening surface 422 of the air outlet 42 of the scroll casing 40. In the scroll casing 40, at least a part of the outer shell forming the air outlet 42 is arranged at a position overlapping the second heating coil 14 in the vertical direction. That is, at least a part of the air outlet 42 is opened below the second heating coil 14. A suction port 41 of the scroll casing 40 of the blower is connected to the housing intake port 6 in an airtight manner by an intake air passage partition wall 22. For this reason, when the fan 20 of the blower rotates, air outside the main body housing 1 is sucked into the fan 20 from the suction inlet 41 of the scroll casing 40 through the inside of the intake air passage bulkhead 22 from the housing inlet 6.

  A gap is provided in the flow direction of the cooling air between the second opening surface 422 of the air outlet 42 of the scroll casing 40 and the heat radiating member 35 facing the second opening surface 422, and the upper end position of the second opening surface 422 is provided. Is lower than the upper end position of the heat dissipation member 35. For this reason, the cooling air flowing out from the vicinity of the upper end of the second opening surface 422 of the air outlet 42 strikes the upper end portion of the opposing heat radiating member 35 and is guided upward to form an air flow of the cooling air flowing obliquely upward. That is, cooling air that flows obliquely upward flows between the second opening surface 422 and the heat dissipation member 35. Accordingly, a part of the cooling air blown out from the second opening surface 422 is directed to the second heating coil 14 with almost no heat from the heat radiating member 35, so that the second heating coil 14 is cooled with the low-temperature cooling air. Can be cooled efficiently.

  When viewed in the flow direction of the cooling air from the second opening surface 422, a space allowing ventilation is provided between the most downstream end of the heat radiating member 35 and the front wall of the main body housing 1. For this reason, most of the cooling air coming out of the second opening surface 422 of the air outlet 42 passes between the cooling fins of the heat radiating member 35 to cool the IGBT 32, the diode bridge 33, and the like, and then downstream of the heat radiating member 35. Spill to A part of the cooling air flowing out to the downstream side of the heat radiating member 35 is guided upward by the front wall of the main body housing 1, and is guided to the lower surface of the top plate 2 to cause the second heating coil 14 and the first heating coil 13 to pass through. Cools and flows toward the housing exhaust port 7.

  When viewed in the flow direction of the cooling air from the second opening surface 422, the most downstream end of the circuit board 31 or the most downstream end of the support surface 191 of the substrate holding member 19, and the front wall of the main housing 1. Between the two, a gap that allows ventilation is provided. For this reason, a part of the cooling air that has passed through the upper surface of the circuit board 31 flows into the lower part of the circuit board 31 from this gap. The second circuit board 25 is disposed below the circuit board 31, and the second circuit board 25 is cooled by the cooling air flowing downward from the circuit board 31.

  At least a part of the second ventilation port 24 provided in the second partition wall 23 is at a position overlapping the second circuit board 25 in the height direction or a position lower than the second circuit board 25. Therefore, a cooling air flow path is formed from the gap between the circuit board 31 or the substrate holding member 19 and the front wall of the main body housing 1 to the second ventilation port 24 of the second partition wall 23. The second circuit board 25 is located on the way. Therefore, the second circuit board 25 is efficiently cooled by the cooling air flowing downward from the circuit board 31 until reaching the second ventilation port 24.

  Next, operation | movement of the induction heating cooking appliance 100 which concerns on this Embodiment is demonstrated. When the user operates the operation display unit of the induction heating cooker 100 and the heating condition such as the heating power of the heating port on which the object to be heated is placed and the heating start instruction are input, the control circuit of the circuit board 31 and The drive device 30 operates. When the driving device 30 is operated, a high-frequency current flows through the first heating coil 13 or the second heating coil 14 to generate magnetic lines of force, and an eddy current is generated in the object to be heated placed on the top plate 2 to be heated. Things themselves generate heat.

  When the driving device 30 and other control circuits of the circuit board 31 are operated, the heat generating components constituting the driving device 30 and the control circuit, specifically, the choke coil 34 constituting the power supply circuit, the IGBT 32 constituting the inverter circuit, and the diode bridge The parts such as 33 self-heat and the temperature rises. Further, the coil windings, ferrite, and magnetic shield rings of the first heating coil 13 and the second heating coil 14 also self-heat and the temperature rises. Here, in order to maintain the functions of the components mounted on the circuit board 31, the first heating coil 13, and the second heating coil 14, it is necessary to suppress an excessive temperature rise. The control circuit sets the detection value of a temperature sensor (not shown) that detects the temperatures of the circuit board 31, the first heating coil 13, and the second heating coil 14, and heating conditions such as thermal power set in the operation display unit. Based on this, the electric motor 21 of the blower is operated. By the operation of the electric motor 21, the fan 20 rotates and the cooling air is blown.

  When the fan 20 rotates, air outside the main body casing 1 flows through the gap between the kitchen cabinet 200 and the main body casing 1 toward the casing inlet 6 of the main body casing 1. The air flowing into the main body case 1 from the case air inlet 6 flows into the suction port 41 of the scroll casing 40 through an air passage formed between the intake air passage partition wall 22 and the inner wall of the main body case 1. And sucked into the fan 20. The air sucked by the fan 20 is collected in the scroll casing 40 and flows through the flow path in the scroll casing 40 toward the blowout port 42.

  When viewed in the horizontal direction, the cooling air flowing out from the second opening surface 422 of the air outlet 42 of the scroll casing 40 flows toward the heat dissipating member 35 and the heat generating component on the circuit board 31 thermally connected thereto. Cool them. The cooling air flowing out from the second opening surface 422 of the air outlet 42 flows between the circuit board 31 and the second heating coil 14 when viewed in the vertical direction, and the components on the circuit board 31 and the second heating are heated. The coil 14 is cooled.

  When viewed in the horizontal direction, the cooling air flowing out from the first opening surface 421 of the air outlet 42 flows toward the first heating coil 13 and cools the first heating coil 13. When viewed in the vertical direction, the cooling air flowing out from the first opening surface 421 is directed obliquely upward by the air guide portion 44 below the first opening surface 421. When viewed in the vertical direction, the cooling air flowing out from the first opening surface 421 is directed obliquely upward due to a step between the substrate surface of the circuit board 31 and the upper surface of the partition plate 10.

  Thus, in this embodiment, since the cooling air from the first opening surface 421 and the second opening surface 422 of the air outlet 42 of the scroll casing 40 is rectified in the horizontal direction and the vertical direction, the cooling air is cooled. The wind is in good contact with the object to be cooled, and the cooling efficiency of the object to be cooled can be increased.

  The cooling air flowing out from the first opening surface 421 and the second opening surface 422 of the air outlet 42 of the scroll casing 40 flows toward the housing exhaust port 7 while cooling the object to be cooled as described above. Since the first partition 11 is provided to partition the space below the housing exhaust port 7 and the space below the first heating coil 13, and the first ventilation port 12 is provided in the first partition 11, In addition, a flow of cooling air is formed toward the first ventilation port 12 which has a narrow channel cross-sectional area and continues to the housing exhaust port 7. By forming the flow of the cooling air toward the first ventilation port 12 in this way, the cooling air is in good contact with the first heating coil 13 in the process of flowing the cooling air to the first ventilation port 12, and the first heating coil 13 is cooled efficiently. Moreover, the pressure loss accompanying exhaust can be suppressed. The cooling air that has passed through the first vent 12 merges with the cooling air from the heating duct 18 and is exhausted from the main body housing 1 to the outside.

  The heat radiating member 35 thermally connected to the driving device 30 is provided below the second heating coil 14 and at a position overlapping with at least a part of the second heating coil in plan view. And the blower outlet 42 of the scroll casing 40 has the 1st opening surface 421 and the 2nd opening surface 422 opened so that at least one part might overlap in the height direction while opening in a mutually different direction. Cooling air from the outlet 42 is blown out in different directions from the first opening surface 421 and the second opening surface 422, and different cooling objects on the extension of the respective blowing directions are efficiently cooled with low-temperature cooling air. be able to.

  Since at least a part of the heat dissipating member 35 thermally connected to the components of the drive device 30 is disposed in the extended region of the second opening surface 422 of the scroll casing 40, the components of the drive device 30 that generate heat can be efficiently removed. Can be cooled. In addition, since the second heating coil 14 is disposed above the heat radiating member 35 and overlaps at least a part of the heat radiating member 35 in a plan view, the second air is cooled by the cooling air flowing in the vicinity of the heat radiating member 35. The heating coil 14 can be cooled. Due to the arrangement relationship of the second opening surface 422, the heat radiating member 35, and the second heating coil 14, a plurality of objects to be cooled can be cooled without excess or deficiency without providing a dedicated duct. it can. Since the pressure loss is small, the object to be cooled can be cooled with a small air volume, and the power consumption and noise of the blower can be reduced.

  Moreover, the 1st heating coil 13 is arrange | positioned in the position which does not overlap with the extension area | region of the 2nd opening surface 422 of the blower outlet 42 of the scroll casing 40 in planar view. A plane 50 including the first opening surface 421 and a plane 51 that passes through the distal end of the first opening surface 421 farthest from the second opening surface 422 in the horizontal direction and is perpendicular to the first opening surface 421. Among the four regions, at least a part of the first heating coil 13 is disposed in a region 52 that is downstream of the first opening surface 421 and faces the first opening surface 421. For this reason, the 1st heating coil 13 arrange | positioned in the position different from the heat radiating member 35 and the 2nd heating coil 14 can be cooled with the cooling air from an air blower.

  In addition, since a plurality of cooling objects including the first heating coil 13, the second heating coil 14, and the heat dissipating member 35 can be cooled without providing dedicated ducts, respectively, an increase in component cost and assembly cost can be suppressed, Since disassembly and assembly are easy, maintainability can be improved. Moreover, since a dedicated duct is unnecessary, an increase in the size of the structure related to cooling including the blower is suppressed, and the induction heating cooker 100 can be configured compactly. Further, since the first opening surface 421 and the second opening surface 422 are opened so that at least a part thereof overlaps in the height direction, an increase in the height dimension of the scroll casing 40 is suppressed, and the scroll casing 40 is reduced in size. Can be

  In this embodiment, the area of the first opening surface 421 on the projection plane parallel to the first opening surface 421 is ½ of the area of the second opening surface 422 on the projection plane parallel to the second opening surface 422. ~ 1/10. By doing in this way, the balance of the cooling air supplied to the 1st heating coil 13 with a comparatively small cooling load and the heat radiating member 35 with a comparatively large cooling load becomes good, and it was suitable for the cooling object. Cooling takes place. Moreover, since the pressure loss which arises in the 1st opening surface 421 and the 2nd opening surface 422 of the blower outlet 42 can be decreased, the power consumption and noise of a fan can be reduced.

  Further, the winding start portion 431 of the scroll casing 40 is disposed at a position closer to the first heating coil than the winding end portion 432. By doing in this way, the airflow along the side wall which continues to the 1st opening surface 421 from the winding start part 431 used as a negative pressure is formed, and the cooling air which goes to the 1st heating coil 13 which is one of cooling objects is supplied. Is done. Therefore, the first heating coil 13 can be cooled with a small air volume, and the power consumption and noise of the blower can be reduced. A first opening surface 421 is formed in the first side wall 433, and the first side wall 433 is inclined so as to approach the first heating coil 13 as the distance from the winding start portion 431 increases in plan view. For this reason, the cooling air flowing along the first side wall 433 can be guided to the first heating coil 13 more smoothly.

  Further, an air guide portion 44 that guides air blown from the first opening surface 421 upward is provided below the first opening surface 421 of the air outlet 42 of the scroll casing 40. For this reason, the airflow which goes diagonally upward can be blown out from the 1st opening surface 421 of the blower outlet 42, and the contact rate of the cooling air to the 1st heating coil 13 arrange | positioned ahead of the advancing direction of cooling air is raised. be able to. If the cooling air that flows horizontally flows below the first heating coil 13, the cooling air cools around the lower surface of the first heating coil 13. On the other hand, the cooling air blown obliquely upward against the lower surface of the first heating coil 13 is formed by forming the cooling air directed obliquely upward as in the present embodiment, and the coil constituting the first heating coil 13 The heat generating parts such as the winding, the ferrite, and the magnetic shield ring can be passed upward to cool the heat generating parts. Since the cooling efficiency can be increased by increasing the flow velocity of the cooling air around the heat generating portion, the amount of cooling air can be reduced and the power consumption and noise of the blower can be reduced.

  Further, the circuit board 31 on which the components constituting the driving device 30 are mounted is arranged at a position lower than the arrangement surface of the first heating coil 13, and faces the arrangement surface of the first heating coil 13 from the circuit board 31. A wind guide surface 192 extending in the direction. Therefore, the cooling air blown out from the second opening surface 422 of the air outlet 42 and flowing in the vicinity of the circuit board 31 is guided by colliding with the air guide surface 192 and flows toward the first heating coil 13 located above. . Since the cooling air in the vicinity of the circuit board 31 can be an upward cooling air toward the first heating coil 13, there is an effect of increasing the cooling efficiency of the first heating coil 13 and reducing the load on the blower.

  The air guide surface 192 may be a vertical surface from the circuit board 31 toward the arrangement surface of the first heating coil 13. Further, the air guide surface 192 may be a surface extending obliquely upward from the circuit board 31 toward the arrangement surface of the first heating coil 13. By making the air guide surface 192 an inclined surface, a flow of cooling air with less loss can be formed.

  The air guide surface 192 may be provided integrally with the board holding member 19 that supports the circuit board 31 from below. By doing in this way, a number of parts can be reduced. Further, an air guide surface 192 connected to the end of the substrate holding member 19 may be provided. By doing so, an unnecessary gap is not formed between the air guide surface 192 and the circuit board 31, and a good airflow from the circuit board 31 toward the first heating coil 13 is formed.

  Further, a suction port 41 is formed on the lower surface of the scroll casing 40, and a housing intake port 6 is formed on the main body housing 1 on at least one of the bottom surface, the back surface, and the side wall. The air intake partition wall 22 is provided to connect the air intake port 41 and the wall surface on which the housing air intake port 6 is formed. Since the intake air passage partition wall 22 connecting the suction port 41 of the scroll casing 40 and the wall surface of the main body housing 1 where the housing air inlet 6 is formed is provided, the temperature outside the main body housing 1 is relatively low. Air can be directly taken into the inlet 41 of the scroll casing 40 from the housing inlet 6. Since the air in the main body housing 1 having a relatively high temperature is not mixed with the air sucked into the suction port 41 of the scroll casing 40, low-temperature cooling air can be obtained. In addition, the intake air passage bulkhead 22 according to the present embodiment is in contact with the three sides of the main body housing 1, that is, the side surface, the back surface, and the bottom surface. The housing inlet 6 can be provided on any of the back surface and the bottom surface. By providing the housing intake ports 6 on the three sides of the main body housing 1, that is, the side surface, the back surface, and the bottom surface, the opening area of the housing intake ports 6 can be increased. In addition, the intake air passage partition 22 of the present embodiment forms a substantially straight air passage from the lower side of the main body housing 1 toward the suction port 41 formed on the lower surface of the scroll casing 40. If the air path is not bent, the pressure loss in the flow path from the housing intake port 6 to the intake port 41 is reduced, and the power consumption and noise of the blower can be reduced.

  In the present embodiment, a housing exhaust port 7 communicating with the inside of the main body housing 1 is formed on the upper surface on the back side of the main body housing 1. In plan view, the area of the casing exhaust port 7 that overlaps the range of the extension line of the outer width of the first heating coil 13 is the part that does not overlap the range of the extension line of the outer width of the first heating coil 13. Is larger than the area. The cooling air blown from the outlet 42 of the scroll casing 40 flows toward the casing exhaust port 7 as a whole. In the process in which the cooling air flows toward the housing exhaust port 7, the cooling air passes in the vicinity of the first heating coil 13, so that the cooling efficiency of the first heating coil 13 is increased and the load on the blower can be reduced. .

  Further, in the present embodiment, the first housing 11 is provided in the main body housing 1 so as to partition the space between the space below the housing exhaust port 7 and the space below the first heating coil 13 back and forth. A first air vent 12 is formed in the partition wall 11. By providing the first ventilation port 12 for narrowing the flow path of the cooling air in this way, the cooling air blown from the outlet 42 of the scroll casing 40 is rectified so as to go to the first ventilation port 12, and the cooling air and It is possible to improve the cooling efficiency by improving the contact with the first heating coil 13 that is the object to be cooled, and to reduce the pressure loss accompanying the exhaust. When the lower end of the first partition 11 is in contact with the upper surface of the heating chamber 3 and the upper end of the first partition 11 is in contact with the lower surface of the top plate 2, Strength can be increased. Further, even if foreign matter enters the main body housing 1 from the housing exhaust port 7, the entry of the foreign matter into the space where the first heating coil 13 or the like is disposed can be suppressed by the first partition 11. .

  Further, at least a part of the first vent 12 formed in the first partition wall 11 may be disposed so as to overlap the first heating coil 13 in a front view. By doing in this way, the 1st heating coil 13 which is cooling object is located in the same height as the course of the air current which goes to the 1st ventilation hole 12, and makes the contact of the cooling air to the 1st heating coil 13 favorable. Cooling efficiency can be improved. By improving the cooling efficiency, the load on the blower can be reduced.

  In the present embodiment, an inclined surface 45 is formed on the upper surface of the inner wall of the scroll casing 40, and the inclined surface 45 is inclined downward toward the second opening surface 422. The upper end of the second opening surface 422 is at a position lower than the upper end of the heat radiating member 35, and a gap is provided between the second opening surface 422 and the heat radiating member 35. By providing the scroll casing 40 with an inclined surface 45 that is inclined downward toward the air outlet 42 to reduce the flow passage cross-sectional area of the cooling air, it is possible to supply the cooling air having an increased wind speed to the heat radiating member 35 to be cooled. The cooling efficiency of the heat radiating member 35 can be improved. Further, the cooling air flowing near the upper end of the second opening surface 422 of the air outlet 42 passes through the gap between the heat radiation member 35 and the second opening surface 422. In this process, the cooling air is directed upward toward the upper end portion of the heat radiating member 35, more specifically, the upper end portion of the vertical surface of the heat radiating member 35, and heads toward the second heating coil 14. For this reason, the cooling air with relatively low temperature which is not in contact with the heat generating component etc. of the circuit board 31 can be supplied to the second heating coil 14, and the cooling efficiency of the second heating coil 14 is increased to reduce the load on the blower. can do. Further, by adjusting the size of the gap between the second opening surface 422 and the heat radiating member 35, the distribution of the cooling air can be adjusted between the second heating coil 14 and other cooling objects, and the cooling unevenness is reduced. Since waste due to excessive cooling can be suppressed, the load on the blower can be reduced.

  In the present embodiment, a gap is provided between the second opening surface 422 and the heat dissipation member 35. A part of the heat radiating member 35 is disposed at a position protruding outside the extended region of the second opening surface 422 of the scroll casing 40, and a part of the heat radiating member 35 protrudes from the extended region of the second opening surface 422. The choke coil 34, which is a circuit component that generates heat, is provided in the same direction. Part of the cooling air that has flowed out of the second opening surface 422 passes through the gap between the second opening surface 422 and the heat radiating member 35 and collides with a portion that protrudes from the extended region of the second opening surface 422 of the heat radiating member 35. Since the direction is changed and supplied to the choke coil 34 on the downstream side, the choke coil 34 can be efficiently cooled. By adjusting the gap between the second opening surface 422 and the heat radiating member 35, the distribution of cooling air can be adjusted between the choke coil 34 and other cooling objects, the cooling village can be reduced, and waste due to excessive cooling can be suppressed. As a result, the load on the blower can be reduced.

  In the present embodiment, each of the first heating coil 13 and the second heating coil 14 is supported by the main body housing 1 via the three heating coil support members 16, and the three heating coil support members 16 are different from each other. It is a member and is individually attached to the main body housing 1 and the like. Since the three heating coil support members 16 are individually attached to the main body housing 1 and the like, it is not necessary to connect the three heating coil support members 16 together, and no material is required for connection, leading to low cost. The cooking device 100 can be manufactured. In addition, since the first heating coil 13 and the second heating coil 14 are supported by the three heating coil support members 16 at a plurality of points, the heating coil support member 16 is compared with the case where it is supported by a large member. 13 and the flow of the cooling air below the second heating coil 14 are hardly hindered. For this reason, while being able to raise the cooling efficiency of the 1st heating coil 13 and the 2nd heating coil 14, a pressure loss is reduced and the load of an air blower can be reduced. The number of heating coil support members 16 is preferably three or more in order to achieve stable support, but is not limited to three.

  Further, in the present embodiment, the drive device 30 thermally connected to the heat radiating member 35 includes a plurality of heating elements, and among the plurality of heating elements, the heating elements close to the air outlet 42 of the scroll casing 40 are far. The amount of heat generated is larger than that of the heating element. More specifically, the IGBT 32 having a relatively large calorific value is disposed closer to the air outlet 42 than the diode bridge 33 having a small calorific value. Since the relatively low-temperature cooling air flowing out from the air outlet 42 can be supplied to the heat generating element having a larger heat generation amount, the cooling efficiency can be increased and the load on the blower can be reduced.

  Moreover, in this Embodiment, the heating provided in the lower side of the 1st heating coil 13 in the 2nd circuit board 25 provided in the drive device 30 and the 2nd heating coil 14 in the main body housing | casing 1 is provided. The cabinet 3 and the second partition wall 23 that partitions the second circuit board 25 and the heating cabinet 3 are provided. A gap is formed between the bottom outer surface of the heating chamber 3 and the bottom inner surface of the main body housing 1, and the second partition wall 23 includes a bottom outer surface of the heating chamber 3 and a bottom inner surface of the main body housing 1. A second ventilation port 24 that is at least partially overlapped in the height direction with the gap between the two is formed, and an air passage is provided between the air outlet 42 of the scroll casing 40 and the second ventilation port 24. For this reason, when the cooling air passes through the air passage between the air outlet 42 of the scroll casing 40 and the second ventilation port 24, the cooling air passes in the vicinity of the second circuit board 25 in the process. 25 can be cooled. In addition, since the second circuit board 25 is arranged below the circuit board 31, the arrangement space in the horizontal direction of the main body housing 1 can be saved. In addition, since a smooth flow of cooling air toward the second ventilation port 24 of the second partition wall 23 is formed, the cooling efficiency of the second circuit board 25 can be increased. By increasing the cooling efficiency of the second circuit board 25, components having a large amount of heat generation can be mounted on the second circuit board 25 to enhance the function, or the integration density of the components of the second circuit board 25 can be increased. It becomes possible.

  In addition, the second ventilation opening 24 of the second partition wall 23 is at least partially overlapped in the height direction with the gap between the bottom outer surface of the heating chamber 3 and the bottom inner surface of the main body housing 1. The cooling air that has passed through can be guided to the bottom surface of the heating chamber 3. For this reason, since it is hard to contact cooling air with the side wall of the heating chamber 3, it can suppress the temperature fall of the heating chamber 3, and can suppress the heat transfer to the kitchen cabinet 200 in the bottom face side of the heating chamber 3. .

Embodiment 2. FIG.
The second embodiment will be described with reference to FIGS. 1, 2, and 12 to 18. The configuration shown in FIGS. 1 and 2 is the same as that of the first embodiment. Below, it demonstrates focusing on a different part from Embodiment 1. FIG.

  FIG. 12 is a rear perspective view of the induction heating cooker 100A according to Embodiment 2 with the housing upper frame 5 and the top plate 2 removed. FIG. 13 shows the front side of the induction heating cooker 100A according to the second embodiment with the housing upper frame 5, the top plate 2, the first heating coil 13, the second heating coil 14, and the radiant heater 15 removed. It is a perspective view. In the present embodiment, a first partition 11 </ b> A is provided instead of the first partition 11 of the first embodiment. The first partition 11A is the same as the first embodiment in that it partitions the space below the first heating coil 13 and the space below the housing exhaust port 7 in the front-rear direction. Rather than the first heating coil 13. In addition, the first partition wall 11A is provided with a first ventilation port 12A instead of the first ventilation port 12 in the first embodiment. The first ventilation port 12 of the first embodiment is a rectangular opening, but the first ventilation port 12A of the present embodiment is formed by cutting out the first partition wall 11A from the upper part to the lower side in a generally arc shape. Has a shape. When viewed in the left-right direction of the first partition 11A, the first ventilation port 12A has a shape in which the center side is deeply cut out with respect to the left and right ends.

  FIG. 14 is a top perspective view of the blower and the intake air passage partition 22 according to the second embodiment. FIG. 15 is a bottom perspective view of the blower and the intake air passage partition 22 according to the second embodiment. The fan 20A of the present embodiment is a centrifugal fan as in the embodiment, and is arranged so that the rotation axis is directed in the vertical direction. Unlike Embodiment 1, fan 20A is arranged to rotate counterclockwise in plan view.

  The scroll casing 40A that houses the fan 20A is arranged so that the direction of the air outlet 42 in the left-right direction is opposite to that of the first embodiment, in accordance with the arrangement of the fan 20A so as to rotate counterclockwise. That is, the winding start portion 431A of the scroll casing 40A is located on the right side of the sheet of FIG. 14, and the winding end portion 432A is located on the left side of the page of FIG. Further, the second side wall 434A connecting the winding end portion 432A of the scroll casing 40A and the air outlet 42A is inclined in a direction away from the outer periphery of the fan 20A, that is, a direction closer to the first heating coil 13 as the air outlet 42A is approached. The flow path formed inside the second side wall 434A is enlarged.

  The air outlet 42A of the scroll casing 40A has a first opening surface 421A and a second opening surface 422A that open in different directions. The first opening surface 421A is formed on the second side wall 434A, the second opening surface 422A is formed between the first side wall 433A and the second side wall 434A, and the first opening surface 421A and the second opening surface 422A are , Opening in a direction different by about 90 degrees. The first opening surface 421A and the second opening surface 422A only need to open in different directions in the horizontal direction, and the angle of the difference in direction is not limited to 90 degrees. Further, in the present embodiment, a partition portion 423A that partitions the first opening surface 421A and the second opening surface 422A and connects the upper surface and the lower surface of the scroll casing 40 is provided.

  FIG. 16 is a plan view of the induction heating cooker 100A according to Embodiment 2 with the exhaust cover 8, the top plate 2, and the second heating coil 14 removed. Also in the present embodiment, a plane 50A including the first opening surface 421A and a plane 51A perpendicular to the first opening surface 421A through the distal end of the first opening surface 421A farthest from the second opening surface 422A in the horizontal direction. Among the four regions separated by the first opening surface 421A, and is disposed in a region 52A facing the first opening surface 421A. In FIG. 16, the area 52A is shaded. Cooling air from the first opening surface 421A is mainly supplied to the portion arranged in the region 52A of the first heating coil 13 so that the first heating coil 13 is efficiently cooled. The second side wall 434A of the scroll casing 40A is inclined outward from the winding end portion 432A toward the downstream side, and guides the cooling air passing through the inside of the second side wall 434A toward the radially outer side of the fan 20A. The direction of the cooling air blown out from the one opening surface 421A is guided in the direction of the first heating coil 13 that is a cooling target. By doing in this way, the flow of the cooling air which goes to the 1st heating coil 13 from the 1st opening surface 421A substantially linearly is formed, the contact of the cooling air to the 1st heating coil 13 is made favorable, and the 1st heating The cooling efficiency of the coil 13 is increased.

  FIG. 17 is a front cross-sectional view of a state where the induction heating cooker 100A according to Embodiment 2 is attached to the kitchen cabinet 200. FIG. 17 shows a view cut by a cross section passing through the first opening surface 421A of the air outlet 42A of the scroll casing 40A. A first ventilation hole 12A formed by cutting out the upper part of the first partition wall 11A in an arc shape and overlapping the first heating coil 13 in a front view. For this reason, the cooling air blown out from the air outlet 42A of the scroll casing 40 flows toward the first air vent 12A, and passes through the vicinity of the first heating coil 13 in the process to cool it.

  The first partition 11A is provided to partition the space below the housing exhaust 7 and the space below the first heating coil 13, and the first ventilation port 12A is provided in the first partition 11A. A flow of cooling air is formed toward the first ventilation port 12 </ b> A that has a narrow channel cross-sectional area and continues to the housing exhaust port 7. In this way, the flow of the cooling air toward the first ventilation port 12A is formed, so that the cooling air well contacts the first heating coil 13 in the process of the cooling air flowing through the first ventilation port 12A. 13 is cooled efficiently. Moreover, the pressure loss accompanying exhaust can be suppressed.

  FIG. 18 is a side cross-sectional view of a state where the induction heating cooker 100A according to Embodiment 2 is attached to the kitchen cabinet 200. FIG. 18 shows a view cut by a cross section passing through the second opening surface 422A of the air outlet 42A of the scroll casing 40A. A portion of the upper surface of the scroll casing 40A on the upstream side of the second opening surface 422A rises obliquely toward the second opening surface 422A, and this portion is referred to as an inclined surface 45A. In the air flow direction, the flow path cross section in the scroll casing 40A is enlarged from the upstream end to the downstream end of the inclined surface 45A.

  When the fan 20A operates, the cooling air flowing in the scroll casing 40A flows out from the second opening surface 422A in an obliquely upward direction along the inclined surface 45A that is inclined upward as it goes toward the air outlet 42A. Between the second opening surface 422A and the heat radiating member 35, there is provided a gap through which air can flow as in the first embodiment, and the cooling air flowing out from the second opening surface 422A is inclined through the gap. It goes upward and is sprayed on the lower surface of the second heating coil 14. The cooling air blown to the lower surface of the second heating coil 14 can cool the second heating coil 14 efficiently. Similarly to the first embodiment, the cooling air blown out from the second opening surface 422A cools the heat-radiating member 35 to be cooled and the various heat-generating components mounted on the circuit board 31.

  Further, the cooling air flowing out from the first opening surface 421A of the air outlet 42A is directed by the second side wall 434A configured to approach the first heating coil 13 as the distance from the winding end portion 432A increases, and the first heating coil It flows toward 13. For this reason, the 1st heating coil 13 can be cooled efficiently.

  As in the present embodiment, even when the winding direction of the scroll casing 40A is reversed from that of the first embodiment, a plurality of objects to be cooled arranged in different directions are provided in one scroll casing 40A. The cooling air can be efficiently cooled with the cooling air from the air outlet 42, and the same effect as in the first embodiment can be obtained.

Embodiment 3 FIG.
In the third embodiment, a modified example of the blower will be described focusing on differences from the first embodiment and the second embodiment.

  FIG. 19 is a top perspective view of the blower according to the third embodiment. FIG. 20 is a top perspective view showing another example of the blower according to Embodiment 3. The blower shown in FIG. 19 and the blower shown in FIG. 20 are the same in basic configuration as the blowers of the first and second embodiments, respectively, but are different in that no partition is provided. As shown in FIG. 19, the first opening surface 421 </ b> B and the second opening surface 422 </ b> B of the air outlet 42 </ b> B of the scroll casing 40 </ b> B are opened in different directions, respectively, even if there is no partition portion. The opening surface 421B and the second opening surface 422B communicate with each other. Further, the first opening surface 421C and the second opening surface 422C of the outlet 42C of the scroll casing 40C shown in FIG. 20 are opened in different directions, respectively, and the first opening surface 421C and the second opening surface 422C Are communicating.

  Even in such a configuration, as in the first and second embodiments, a plurality of cooling objects arranged in different directions are efficiently cooled by the cooling air from the air outlet provided in one scroll casing. Can cool well. Moreover, since there is no partition part, it becomes possible to cool the cooling object arrange | positioned in the advancing destination of the cooling air which blows off from between the 1st opening surface 421 and the 2nd opening surface 422.

  In the above description, a so-called built-in type induction heating cooker has been described as an example. However, even if the present invention is applied to a stationary type induction heating cooker, similar effects can be obtained.

  DESCRIPTION OF SYMBOLS 1 Main body housing | casing, 2 Top plate, 3 Heating chamber, 5 Housing | casing upper frame, 6 Housing | casing inlet port, 7 Housing | casing exhaust port, 8 Exhaust port cover, 9a Heating port, 9b Heating port, 9c Heating port, 10 Partition Plate, 11 First partition, 11A First partition, 12 First ventilation port, 12A First ventilation port, 13 First heating coil, 14 Second heating coil, 15 Radiant heater, 16 Heating coil support member, 17 Elastic body, 18 heating chamber duct, 19 substrate holding member, 20 fan, 20A fan, 21 electric motor, 22 intake air passage partition wall, 23 second partition wall, 24 second ventilation port, 25 second circuit board, 30 driving device, 31 circuit board, 32 IGBT, 33 Diode bridge, 34 Choke coil, 35 Heat dissipation member, 40 Scroll casing, 40A Scroll casing, 40B Scroll Casing, 40C scroll casing, 41 air inlet, 42 air outlet, 42A air outlet, 42B air outlet, 42C air outlet, 43 side wall, 44 air guide, 45 inclined surface, 45A inclined surface, 50 plane, 50A plane, 51 Plane, 51A Plane, 52 region, 52A region, 100 induction heating cooker, 100A induction heating cooker, 191 support surface, 192 wind guide surface, 193 legs, 200 kitchen cabinet, 421 first opening surface, 421A first opening Surface, 421B first opening surface, 421C first opening surface, 422 second opening surface, 422A second opening surface, 422B second opening surface, 422C second opening surface, 423 partitioning part, 423A partitioning part, 431 winding start part , 431A Winding start part, 432 Winding end part, 432A Winding end part, 433 First side wall 433A first side wall, 434 the second side wall, 434A second side wall.

Claims (19)

The main body housing,
A top plate provided on the upper surface of the main body casing;
A first heating coil and a second heating coil provided in the main body casing below the top plate;
A driving device for driving the first heating coil and the second heating coil;
A centrifugal fan,
A scroll casing that houses the fan and has an air outlet formed therein;
Said outlet of said scroll casing is open in different directions in the horizontal direction, at least a portion has a first opening surface and a second opening surface which is open so as to overlap said first opening surface in the height direction And a member that partitions the second opening surface is not provided,
In plan view, the second heating coil is disposed above an extension region formed by extending the second opening surface of the outlet of the scroll casing in a direction perpendicular to the second opening surface,
The first heating coil is disposed at a position that does not overlap the extended region of the second opening surface in a plan view, and at least a part of the first heating coil includes the first opening surface of the first opening coil. An induction heating cooker characterized by being arranged above an extended region formed by extending in a direction orthogonal to one opening surface. The area of the first aperture plane on the projection plane parallel to the first aperture plane is 1/2 to 1/10 of the area of the second aperture plane on the projection plane parallel to the second aperture plane. The induction heating cooker according to claim 1, wherein The induction heating cooker according to claim 1 or 2, wherein the winding start portion of the scroll casing is disposed closer to the first heating coil than the winding end portion. The scroll casing has a first side wall that connects the winding start portion and the outlet.
The first opening surface is formed on the first side wall,
4. The induction heating cooker according to claim 3, wherein the first side wall is inclined so as to approach the first heating coil as the distance from the winding start portion increases in plan view. The induction heating cooker according to claim 1 or 2, wherein the winding start portion of the scroll casing is disposed farther from the first heating coil than the winding end portion. The scroll casing has a second side wall that connects the winding end portion and the outlet.
The first opening surface is formed on the second side wall;
6. The induction heating cooker according to claim 5, wherein the second side wall is inclined so as to approach the first heating coil as the distance from the winding end portion increases in a plan view. The air guide part which guides the air which blows off from the said 1st opening surface upwards below the said 1st opening surface of the said blower outlet of the said scroll casing was provided. The induction heating cooker according to any one of claims 6 to 6. The circuit board on which the components constituting the driving device are mounted is arranged at a position lower than the arrangement surface of the first heating coil,
The induction heating cooker according to any one of claims 1 to 7, wherein the induction heating cooker has an air guide surface extending from the circuit board toward an arrangement surface of the first heating coil. The induction heating cooker according to claim 8, wherein the air guide surface extends obliquely upward from the circuit board toward the arrangement surface of the first heating coil. The induction heating cooker according to claim 8 or 9, further comprising a board holding member that has the air guide surface and supports the circuit board from below. A suction port is formed on the lower surface of the scroll casing,
The main body housing has a housing air inlet formed on a wall surface of at least one of a bottom surface, a back surface, and a side surface,
11. The intake air passage partition that connects the suction port of the scroll casing and the wall surface on which the housing intake port is formed is provided. 11. Induction heating cooker. A housing exhaust port communicating with the inside of the main body housing is formed on the upper surface on the back side of the main body housing,
In plan view, the area of the casing exhaust port that overlaps the range of the extension line of the outer width of the first heating coil is the area of the part that does not overlap the range of the extension line of the outer width of the first heating coil. It is larger than an area. The induction heating cooking appliance as described in any one of Claims 1-11 characterized by the above-mentioned. In the main body housing, provided with a first partition wall that divides the space below the housing exhaust port and the space below the first heating coil back and forth,
The induction heating cooker according to claim 12, wherein a first ventilation hole is formed in the first partition wall. The induction heating cooker according to claim 13, wherein at least a part of the first ventilation port formed in the first partition wall overlaps the first heating coil in a front view. A heat dissipating member is provided that is thermally connected to at least a part of the driving device and is located below the second heating coil and overlaps at least a part of the second heating coil in plan view. ,
The upper surface of the inner wall of the scroll casing is inclined downward toward the second opening surface,
The upper end of the second opening surface is lower than the upper end of the heat dissipation member,
The induction heating cooker according to any one of claims 1 to 14, wherein a gap is provided between the second opening surface and the heat radiating member. A heat dissipating member is provided that is thermally connected to at least a part of the driving device and is located below the second heating coil and overlaps at least a part of the second heating coil in plan view. ,
A gap is provided between the second opening surface and the heat dissipation member,
A part of the heat radiating member is arranged at a position protruding outside the extension region of the second opening surface of the scroll casing,
The circuit component that generates heat is provided in the same direction as a direction in which a part of the heat dissipation member protrudes from the extended region of the second opening surface. The induction heating cooker described. Each of the first heating coil and the second heating coil is supported by the main body housing via at least three support members,
The induction heating cooker according to any one of claims 1 to 16, wherein the at least three support members are separate members, and are individually attached to the main body casing. The driving device includes a plurality of heating elements,
The heat generating element close to the air outlet of the scroll casing among the plurality of heat generating elements has a larger amount of heat generation than a distant heat generating element. Induction heating cooker. A second circuit board provided under the driving device and the second heating coil;
A heating chamber provided below the first heating coil in the main body housing;
A second partition that partitions between the second circuit board and the heating chamber;
A gap is formed between the bottom outer surface of the heating chamber and the bottom inner surface of the main body casing,
The second partition wall is formed with a second ventilation port at least partially overlapping in a gap and a height direction between a bottom outer surface of the heating chamber and a bottom inner surface of the main body housing,
The induction heating cooker according to any one of claims 1 to 18, wherein an air passage is provided between the air outlet of the scroll casing and the second air outlet.