JP5246049B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker.

  Conventionally, as this type of induction heating cooker, there has been one as described in Patent Document 1 (Japanese Patent Laid-Open No. 61-260585), for example.

  In Patent Document 1, two choke coils that connect a power input unit of an electromagnetic cooker and each line of a single-phase AC power supply, a bypass capacitor that connects each terminal of the choke coil on the electromagnetic cooker side, and the choke A cover that covers the coil, and the cover is configured such that the surface facing the induction heating coil is made of a nonmagnetic metal plate and the other surface has an opening.

JP-A 61-260585

  However, in recent years, this type of induction heating cooker has been mainly used for equipment with a total power of 5800 W and is 200 V. However, since a current of about 29 A flows, the choke provided in the power supply section in the conventional configuration. The temperature rise of electronic components including coils, capacitors and the like is increased by the electric resistance in the power supply path connection portion. Depending on the part, cooling measures are required, and by covering with a non-magnetic metal plate, improvement in noise resistance is achieved, but there is a problem that there is a trade-off of deterioration in cooling performance It was. In addition, in order to improve the cooling performance of components in the power path connection section such as a choke coil, a means of providing a power path connection section in the vicinity of the exhaust port and exhausting heat generated in the power path connection section directly to the device main body can be considered. In addition, there has been a problem that the liquid that has been blown from the pan during use enters the power supply path connection portion from the exhaust port, resulting in a risk of equipment failure.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an induction heating cooker that prevents liquid from entering the power path connecting portion from the outside and improves the cooling performance of the power path connecting portion. And

In order to solve the above-mentioned conventional problems, an induction heating cooker according to the present invention includes an outer shell constituting a main body, a top plate for placing an object to be heated provided on the upper surface of the main body, and a lower portion of the top plate. A heating coil for inductively heating the object to be heated, an opening provided in front of the main body, a fan for sucking air outside the main body through the opening, and cooling air blown rearward from the fan A circuit board provided on the downstream side for controlling the output of the heating coil, an exhaust port serving as an outlet for the cooling air provided on the upper surface behind the outer shell, and a power source for supplying commercial power through the rear portion of the outer shell code, and the cord and the circuit power supply path connecting unit for connecting the power supply path leading to the substrate, mounted on the outer rear side, and a metal cover forming a duct so as to cover the power supply path connecting portion Wherein the duct has an opening downward and an upper surface, an opening portion of the upper surface in the vicinity of the exhaust port so as not to overlap with the exhaust port as viewed from above, and shifted in the lateral direction from the exhaust port provided in a position, the cooling air passes through the opening in the top surface from the opening of the lower, and characterized by being configured from an opening of the upper surface so that leading to the exhaust port.

As a result, the temperature rise of the power supply path connecting portion can be suppressed, and the noise shielding performance from the magnetic flux leaked from the heating coil to the power supply path connecting portion and the electromagnetic noise generated from the switching power supply can be improved. In addition, by arranging the top opening of the duct so that it does not overlap the exhaust port, even if the user spills liquid such as water or soup into the exhaust port during cooking, the power path connection Liquid does not enter the part, so there is no danger of short circuit and it can be used safely.

  The induction heating cooker of the present invention has an opening on the top and bottom, and is provided so that the opening above the metal duct covering the power path connection portion and the exhaust port do not overlap when viewed from above the device. Cooling performance and noise shielding performance can be improved while preventing the ingress of water from the exhaust port through the power path connecting portion provided at the rear.

Sectional drawing of the induction heating cooking appliance in the 1st Embodiment of this invention The perspective schematic diagram which shows the structure inside the induction heating cooking appliance in the 1st Embodiment of this invention. Detailed view of the noise filter mounting portion of the induction heating cooker in the first embodiment of the present invention The block diagram of the induction heating cooking appliance in the 1st Embodiment of this invention Schematic diagram of an induction heating cooker showing a third embodiment of the present invention Schematic of induction heating cooker showing the fourth embodiment of the present invention Schematic of the induction heating cooking appliance which shows the 5th Embodiment of this invention Schematic of the induction heating cooking appliance which shows the 6th Embodiment of this invention

1st invention, the outline which comprises a main body, the top plate for mounting the to-be-heated object provided in the main body upper surface, the heating coil which carries out induction heating of the to-be-heated object provided under the top plate, An opening provided in the front of the main body, a fan that sucks air outside the main body through the opening, a circuit board that is provided downstream of the cooling air blown rearward from the fan and controls the output of the heating coil, and an outer shell Power supply path connection that connects the exhaust outlet that is the outlet of the cooling air provided on the rear upper surface, the power cord that feeds the commercial power through the rear part of the outer shell, and the power supply path that leads the terminal of the power cord and the circuit board And a duct made of metal covering the power path connection portion on the outer side of the outer shell, the duct has openings on the lower and upper surfaces, and the opening on the upper surface does not overlap the exhaust port when viewed from above in the vicinity of the exhaust port And provided at a position shifted in the lateral direction from the exhaust port by the cooling air passes through the opening in the top surface from the opening of the lower, configured to lead to the exhaust port from the opening of the upper surface, While suppressing the temperature rise of a power path connection part, the noise shielding performance from the leakage magnetic flux from the heating coil to a power path connection part or the electromagnetic noise emitted from a switching power supply can be improved. In addition, by arranging the top opening of the duct so that it does not overlap the exhaust port, even if the user spills liquid such as water or soup into the exhaust port during cooking, the power path connection Liquid does not enter the part, so there is no danger of short circuit and it can be used safely.

  In the second invention, in particular, the duct of the first invention further covers the noise filter provided between the power path connecting portion and the circuit board, thereby improving the cooling performance of the noise filter. The noise shielding performance of the noise filter can be improved.

  In the third invention, in particular, a side wall substantially perpendicular to the bottom surface is provided between the circuit board of the first or second invention and the outer bottom surface, and the cooling air from the fan is surrounded by the circuit board, the outer bottom surface and the side wall. By letting it flow in the path, the cooling air can be efficiently flowed into the duct, and the cooling performance can be improved.

  In the fourth invention, in particular, when a partition plate substantially parallel to the bottom surface is provided between the circuit board of the first or second invention and the outer bottom surface, the cooling air from the fan is allowed to flow between the partition plate and the outer bottom surface. By doing so, the cooling air can be efficiently flowed into the duct, and the cooling performance can be improved.

  In particular, the fifth aspect of the invention provides cooling by providing a substantially vertical side wall that abuts against the partition plate of the fourth aspect of the invention and the bottom surface of the outer shell, and flowing cooling air through a path surrounded by the partition plate, the outer bottom surface, and the side wall. Wind can be efficiently flowed into the duct, and the cooling performance can be improved.

  In the sixth aspect of the invention, in particular, a space is further formed between the partition plate of the fifth aspect of the invention, the outer bottom and the side wall, and the space constitutes a path connected to the exhaust port. When liquid such as water that has entered from the exhaust port flows into the space from the exhaust port, liquid such as water may enter the cooling air path, and the liquid may ride on the wind of the fan and adhere to the power path connection part. In addition, even when the user spills liquid such as water or soup into the exhaust port during cooking, there is no danger of short-circuiting, and the user can use it with peace of mind.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view of an induction heating cooker in the present embodiment.

  FIG. 2 is a schematic perspective view showing an internal configuration of the induction heating cooker in the present embodiment.

  FIG. 3 is a detailed view of the noise filter mounting portion of the induction heating cooker in the present embodiment.

  FIG. 4 is a block diagram of the induction heating cooker in the present embodiment.

As shown in the figure, the main body outline 11 of the induction heating cooker made of metal is inserted and installed from the upper surface opening of the kitchen 12. On the upper surface of the main body outer shell 11, a top unit portion 13 that covers the upper surface of the main body outer shell 11 and supports the main body outer shell 11 when the main body outer shell 11 is inserted and installed from the upper surface opening of the kitchen, a pan that constitutes the top unit portion 13, and the like. A top plate 14 made of crystallized glass to be placed, a metal underframe 15 that supports the lower surface of the top plate, a top heating unit 16a on the left side, and a right heating coil 16b on the right side below the top unit 13 in the main body outer shell 11. Is placed. Further, on the left side of the main body, a roaster 17 is placed below the left heating coil 16a. On the right side of the roaster 17, below the right heating coil 16 b, a circuit board 19 is provided that supplies current to the left heating coil 16 a and the right heating coil 16 b and is driven and controlled, which are held by the substrate base 18. The circuit board 19 is provided with a rectifier circuit 20, an inverter circuit 21, a switching power supply 22, and a control circuit 23. In addition, a cooling fan 24 that sends cooling air into the main body shell 11 in the vicinity of the front side of the circuit board 19 is disposed, and an operation unit 25 that performs heating operation setting is disposed on the front side of the cooling fan 24. A power supply path connection board 27 attached to a power supply path connection board holder 26 is provided on the outer rear side surface behind the circuit board 19, and a power cord inserted through an opening in the outer rear side face below the power supply path connection board 27. 28 power cord power supply connection portions 29 are connected to the lower terminal block of the power supply path connection portion substrate 27 by terminal screws. Further, the noise filter 31 attached to the noise filter substrate holder 30 is attached to the outer rear side surface of the power path connection board 27 and is output from the power path connection board 27 above the power path connection board 27. The generated current passes through the noise filter 31 and is supplied to the control circuit 23. Further, the power cord ground connection portion 32 is connected to the outer rear side surface of the power path connection portion board 27 by being tightened to the lower side. A metal power path connecting part cover 33 is formed so as to surround the front and left sides of the power path connecting part substrate 27, the power cord power source connecting part 29, and the power cord ground connecting part 30, and the power path connecting part cover 33 is The cover screw tightening portion 34 that is set so as to contact the rear side surface of the outer shell and is provided on a part of the power path connection portion cover 33 is sandwiched between the rear side surface of the main body outer shell 11 and the underframe 15 and is tightened together with screws. The underframe 15 covers the upper part of the power supply path connection board 27. The power cord 28 has a three-wire integrated configuration in which two power connection wires and one ground wire are bundled. Further, the power supply path connection portion cover 33 is provided with a cover vent hole 35 as long as an arbitrary noise shielding effect is not impaired. Furthermore, a space is provided on the lower surface of the substrate base 18 between the outer bottom and the substrate base 18 so as to form a ventilation path from the cooling fan 24 to the opening 33a below the power supply path connection portion cover. Further, a metal partition plate 36 is disposed between the roaster 17, the substrate base 18, the power supply path connection portion cover 33, the cooling fan 24, and the operation portion 25. Further, an exhaust port 37 serving as an outlet for cooling air is provided in the upper top unit portion 13 at the rear of the main body shell 11.

  The operation unit 25 is built in an operation unit case 38 that forms the outside of the operation unit, and the operation unit 25 is housed in the operation unit case 38 by opening and closing, or is exposed to the outside of the operation unit case 38. ing. The operation unit 25 includes an operation push button unit 39 disposed at the top, and an operation board 40 having a switch for detecting an operation of a button provided below the operation push button unit 39 and transmitting a signal to the circuit board 19. The operation board base 41 that supports the operation board, the left and right support portions 42 that support the operation board base 41 in the lower left and right directions, and the front plate 43 that covers the operation board base and the front surfaces of the left and right support portions. In addition, a convex portion on the upper surface of the operation portion 25 having a width of about 50 mm is provided at a substantial center at the back of the upper surface of the operation portion 25, and a downward convex portion having a width of about 50 mm is provided at a substantial center of the upper surface of the operation portion case 38. By passing the shaft 44 through the left and right lower parts of the left and right support part 42 and the side part of the operation part case 38 opposite to the left and right support parts 42, the operation part 25 is accommodated in the operation part 25 case. The operation unit 25 is exposed outside the case. At this time, the convex portion on the upper surface of the operation unit 25 provided at the back of the upper surface of the operation unit 25 rotates with a gap from the inner surface of the operation unit case 38. When the operation part 25 is opened, the upper surface convex part of the operation part 25 comes into contact with the downward convex part provided on the upper surface of the operation part case 38, and the rotation stops.

  An operation unit case opening hole 45 provided in the operation unit case 38 behind the operation unit 25 is provided, and a continuous ventilation path is formed with a gap of about 4 mm between the operation unit case 38 and the operation unit 25.

  The cooling fan 24 is located in the back of the operation unit case 38, and the circuit board 19 is disposed in the back of the cooling fan 24. The fan intake port 46 is on the operation unit case 38 side, and the exhaust port is on the circuit board side.

  Next, the flow of cooling air from the cooling fan 24 will be described. The flow of cooling air is indicated by arrows in FIGS.

  First, the cooling air enters from the gap of about 4 mm between the operation unit case 38 and the operation unit 25, passes through the operation unit case opening hole 45 provided in the operation unit case 38 behind the operation unit, and enters the fan intake port. It is sucked into 46. The sucked air is divided into four paths and discharged.

  The first path is blown into the ventilation path that leads to the power path connection section cover lower opening 33a formed in the space between the circuit board 19 and the outer bottom, and blows into the power path connection section cover lower opening 33a through the ventilation path. The cooling air is discharged from the power path connection part cover upper opening 33b through the ventilation path having the power path connection part substrate 27 formed by the power path connection part cover 33 and the outer rear side surface, and further, A path that is discharged out of the flow to the exhaust port 37 at the rear of the top unit part 13 provided so as not to overlap the power path connecting part cover upper opening 33b.

The second path is ejected to the circuit board 19 having a heat generating component such as a switching element and a diode bridge attached to the board base 18 by the cooling fan 24, and then
It flows into the cover vent hole 35 which is opened as long as the noise shielding effect of the rear power path connecting portion cover 33 is not impaired, and is discharged from the power path connecting portion cover upper opening 33b or another cover vent hole provided further. Furthermore, the path | route discharged | emitted out of the flow to the exhaust port 37 provided in the main body top unit part 13 back.

  The third path is a path that is discharged out of the flow to the exhaust port 37 provided at the rear of the main body top unit 13 while passing through the right heating coil 16b by the cooling fan 24.

  The fourth path is a path that is discharged out of the flow to the exhaust port 37 provided at the rear of the main body top unit 13 while passing through the left heating coil 16a by the cooling fan 24.

  The first path of this configuration, which is formed in the space between the circuit board 19 and the outer bottom of the circuit, is blown from the fan to the ventilation path leading to the opening 33a below the cover, and blown through the ventilation path into the lower hole of the opening below the cover. The power path connecting portion board is configured to be discharged from the cover upper opening 33b through the vent path having the power path connecting portion cover 33 and the power path connecting portion substrate 27 formed on the rear side surface of the outer side. 27 can be cooled.

  Further, the second path is ejected to the circuit board 19 having a heat generating component such as a switching element and a diode bridge attached to the board base 18 by the cooling fan 24, and then the noise shielding effect of the rear power path connecting portion cover 33 is obtained. It flows into the cover vent hole 35 that is opened as long as it is not damaged, is discharged from the opening 33b above the power path connection portion cover, or another cover vent hole provided further, and is further provided behind the main body top unit 13 With the ventilation path configuration that discharges to the exhaust port 37 and out of the flow, it is possible to locally cool a portion where a cooling effect cannot be obtained particularly in the first path above the power path connection board 27. Along with the eyes, the effect of improving the cooling of the power path connecting portion 27 and the noise filter 31 can be exhibited. Further, at this time, the thermal effect from the roaster 17 at the time of heating can be shielded by the partition plate 36, and the thermal effect on the cooling path on the right side of the main body can be reduced, and the power path connection board 27 and the noise filter 31 can be reduced. The cooling performance can be improved.

  Next, circuit connection and circuit operation will be described. FIG. 4 shows a block diagram.

  In order to connect the commercial power supply and the device, the power cord power connection portion 29 of the power cord 28 is connected to the power supply path connection portion board 27, and the rectifier circuit 20 of the power supply path connection portion substrate 27 and the circuit board 19 passes through the noise filter. The rectifier circuit 20 and the inverter circuit 21 are connected in the circuit board 19, and the heating coil 16 is connected to the inverter circuit 21. Further, the switching power supply 22 and the control circuit 23 are connected in the circuit board 19, and the control circuit 23 and the operation unit 25 are connected.

  The noise filter 31 prevents generated switching noise from leaking to the power line of the commercial power source.

  The rectifier circuit 20 converts the alternating current of the commercial power source into a direct current. The inverter circuit 21 switches the switching element at several tens of kHz and generates a high frequency current in the heating coil 16. By generating a high-frequency current in the heating coil, an induction current is generated at the bottom of the load such as a cooking pot, and the load is heated.

  The switching power supply 22 generates a DC voltage supplied from the commercial power supply voltage to the control circuit 23 by switching the switching element at about several hundred kHz. The control circuit controls the heating of the induction heating cooker based on the information from the operation unit 25 and the information from the inverter circuit 21. The user adjusts the heating power during cooking by operating the operation unit 25.

  The noise filter 31 is for preventing the generated switching noise from leaking into the power supply line of the commercial power supply. However, the noise filter 31 has a noise blocking performance that is deteriorated by the influence of leakage magnetic flux generated by other components. End up.

  Therefore, in this configuration, a metal power path connecting portion cover 33 is formed so as to surround the front and left and right sides of the power cord power connecting portion 29 and the power cord ground connecting portion 32. The power path connection portion cover screw tightening portion 34 set so as to contact the side surface and provided in a part of the power path connection portion cover 33 is sandwiched between the main body outer rear side surface and the underframe 15 and is tightened together with screws. Since it is connected to the ground as the ground potential portion, the leakage magnetic flux generated in the heating coil 16 and the electromagnetic noise generated from the switching power supply are shielded by the main body outer shell 11 and the power supply path connection portion cover 33 and grounded. Since it is absorbed by the ground as the potential portion, the noise shielding performance can be improved. In addition, the noise filter 31 is located at the rearmost part of the outer body of the main body and can be far away from the switching power supply 22 and the heating coil 16 to reduce the influence of leakage magnetic flux generated by other components on the noise filter 31. . Furthermore, by providing a main body insertion port for the power cord 28 below the power path connecting portion, the power supply cord 28 can be separated from the switching power source 22 and the heating coil 16, and the commercial power source from the power path connecting portion 27 for leakage magnetic flux generated by other components. The influence on the power cord 28 that is a line can be reduced. Further, since the power cord power connection portion 29 of the power cord 28 inserted from the opening on the outer rear side surface below the power path connection portion 27 is connected to the terminal block on the lower side of the power path connection portion substrate 27 by terminal screws. Since the length of the lead of the power cord 28 until the power cord 28 is inserted into the main body and connected to the board can be shortened, and the length of the lead affected by the leakage magnetic flux generated by other components is short, It is possible to reduce the influence of the power supply path connection unit 27 on the power cord that is a commercial power supply line. Since the power cord ground connection portion 32 is connected to the outer rear side surface of the power supply path connection portion substrate 27 by being tightened, the length of the lead can be shortened, and it is affected by the leakage magnetic flux generated by other components. Since the length of the lead is short, the influence on the ground wire can be reduced, and the influence on the power cord 28 which is a commercial power line from the power path connecting portion 27 can be reduced. In addition, since the metal underframe 15 covers the upper portion of the power path connection board 27, leakage magnetic flux generated by the heating coil 16 is shielded by the underframe 15, and noise shielding performance to the power path connection section 27 is improved. Can be improved. In addition, since a part of the power path connecting portion cover 33 is tightened to the metal main body with screws, the power path connecting portion cover 33 is securely connected to the ground by screw tightening and leaks from other parts. Since the magnetic flux is absorbed by the earth as the ground potential portion, the noise shielding performance can be improved.

  As described above, in the present embodiment, the power path connection section 33 is formed from the heating coil 16 by the power path connection section cover 33 formed of a metal surrounding the front and left and right sides of the power path connection section substrate 27 and the power cord power connection section 29. Noise shielding performance from magnetic flux leaked to the substrate 27 and electromagnetic noise generated from the switching power supply 22 can be improved. In addition, a ventilation path for ventilating the cooling air blown by the cooling fan 24 that sucks air outside the cooker main body into the power path connection board 27 and exhausting it outside the cover above the power path connection section 27 is provided. By disposing the power path connection portion cover upper opening 33b and the exhaust port 37 behind the top unit 13 so as not to overlap each other when viewed from above, the components of the power path connection portion substrate 27 can be cooled and used. Even when the liquid spills inside, the liquid can enter the power supply path connecting portion 27 and the risk of a short circuit can be prevented.

(Embodiment 2)
Further, the power path connection board 27 includes a terminal block for connecting the power cord power connection section 29 in order to supply commercial power supplied from the power cord 28 to the circuit board 19. And may also serve as the noise filter 31. In particular, the coil is a component that has a large amount of self-heating and requires cooling measures. Depending on the arrangement of the component, the temperature of the nearby capacitor may also increase. Covering the filter 31 further improves the cooling performance of the noise filter.

(Embodiment 3)
Further, as shown in FIG. 5, a side wall 47 that is substantially perpendicular to the bottom surface is provided between the circuit board 19 and the bottom surface of the main body outline 11, and the cooling air from the cooling fan 24 is surrounded by the circuit board 19, the bottom surface of the main body outline 11, and the side wall 47. By flowing in the route, it is possible to efficiently flow in the power supply path connection portion cover 33, and the cooling performance can be improved.

(Embodiment 4)
Further, a partition plate 48 substantially parallel to the bottom surface is provided between the circuit board 19 and the bottom surface of the main body outer shell 11, and the cooling air from the cooling fan 24 is caused to flow between the partition plate 48 and the bottom surface of the main body outer shell 11, thereby cooling air. Can be efficiently flowed into the power path connecting portion cover 33, and the cooling performance can be improved.

(Embodiment 5)
Further, as shown in FIG. 7, by providing a substantially vertical side wall 47 that abuts against the partition plate 48 and the bottom surface of the main body outer shell 11 and flowing cooling air through a path surrounded by the partition plate 48, the bottom surface of the main body outer shell 11 and the side wall 47, The cooling air can be efficiently flowed into the power supply path connection portion cover 33, and the cooling performance can be improved.

(Embodiment 6)
Further, as shown in FIG. 8, a space 49 is further provided between the partition plate 48, the bottom surface of the main body outer shell 11 and the side wall 47, and is separated from the ventilation path 50 indicated by an arrow in the figure, thereby entering from the exhaust port 37. Since the liquid flows down into the space 49 through the inflow path 51 indicated by an arrow in the figure, the liquid does not enter the ventilation path 50 and the liquid rides on the wind of the cooling fan 24 and does not adhere to the power supply path connection portion substrate 27. Even when the user spills liquid such as water or soup into the exhaust port 37 during cooking, there is no danger of short-circuiting, and the user can use it with peace of mind.

  As described above, the induction heating cooker according to the present invention has openings on the upper and lower sides so that the opening above the metal duct covering the power supply path connection portion and the exhaust port do not overlap when viewed from above the device. Since the cooling performance and noise shielding performance can be improved while preventing the intrusion of water from the exhaust port, the power path connection portion and the exhaust port are provided. The present invention can also be applied to uses such as commercial or household cooking equipment.

11 Body shell (outer shell)
12 Kitchen 13 Top unit 14 Top plate 15 Under frame 16a Left heating coil (heating coil)
16b Right heating coil (heating coil)
17 Roaster 18 Board base 19 Circuit board 24 Cooling fan (fan)
25 Operation part 26 Power supply path connection part board holder 27 Power supply path connection part board (power supply path connection part)
28 Power cord 29 Power cord power connection 30 Noise filter board holder 31 Noise filter 32 Power cord ground connection 33 Power path connection cover (metal cover, duct)
33a Power path connection part cover lower opening (lower opening)
33b Power path connection portion cover upper opening (upper opening)
34 Cover screw tightening part 35 Cover ventilation hole 36 Middle partition plate 37 Exhaust port 38 Operation part case 39 Operation push button part 40 Operation board 41 Operation board base 42 Left and right support part 43 Front plate 44 Shaft 45 Operation part case opening hole (front Opening provided in
46 Fan inlet 47 Side wall 48 Partition plate 49 Space 50 Ventilation path 51 Inflow path

Claims (6)

An outer shell constituting the main body,
A top plate for placing an object to be heated provided on the upper surface of the main body;
A heating coil for inductively heating the object to be heated provided below the top plate;
An opening provided in front of the main body,
A fan that sucks air outside the main body through the opening;
A circuit board provided on the downstream side of the cooling air blown rearward from the fan to control the output of the heating coil;
An exhaust port serving as an outlet for the cooling air provided on the upper surface behind the outer shell;
A power cord for supplying commercial power through the outer rear portion;
A power path connecting portion for connecting the power cord and a power path leading to the circuit board;
A metal cover that is attached to the rear side surface of the outer shell and forms a duct so as to cover the power path connecting portion ;
With
Position the duct has an opening downward and an upper surface, an opening portion of the upper surface, in the vicinity of the exhaust port so as not to overlap with the exhaust port as viewed from above, and which is shifted in the lateral direction from the exhaust port provided, the cooling wind passes through the opening in the top surface from the opening of the lower, the induction cooking device, characterized in that configured as leading to the exhaust port from the opening of the top surface. The duct induction heating cooker according to claim 1, characterized in that cover more noise filter provided between the circuit board and the power supply path connecting unit. Claims, characterized in that the said bottom surface and substantially vertical side walls between the circuit board and the outer bottom surface is provided to flow the cooling air from the fan to the path surrounded by the side walls and the outer bottom surface and the circuit board Item 3. The induction heating cooker according to item 1 or 2. Said bottom surface substantially parallel to the partition plate provided between the outer bottom surface and the circuit board, the cooling air from the fan to claim 1 or 2, characterized in that flow between the outer bottom and the partition plate The induction heating cooker described. Induction cooking according to claim 4 characterized in that flow to route the surrounded by the outer bottom surface and the partition plate substantially cooling air provided vertical side walls abutting on the side walls and the outer bottom surface and the partition plate vessel. Induction heating cooker according to claim 5 constitute a space, the space that was characterized in that it constitutes a path connected to the air outlet between the outer bottom and side walls and the partition plate.

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