JP2010129174A - Induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooker with a noise filter mounted in its restricted body, and also having improved cooling performance of the noise-filter and improved noise-shielding performance of the noise-filter from noises of other parts of the cooker. <P>SOLUTION: By a filter cover 31 made of a noise-filter base board 27 and metal surrounding a front surface and right-and-left sides of a power supply cord-power supply connecting part 29, the noise-shielding performance of the noise filter for leakage flux generated from a heating coil is improved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an induction heating cooker.

Conventionally, as shown in FIG. 5, this type of induction heating cooker includes a heating coil 1, a rectifier circuit 2, an inverter circuit 3 that is connected to the rectifier circuit 2 and generates a high-frequency current in the heating coil 1, and A main body unit 5 having a control circuit 4 for controlling heating by the heating coil 1, a switching power supply 6 for supplying a constant DC voltage to the control circuit 4, and a first power supply connected between the commercial power supply 7 and the rectifier circuit 2. A subunit 9 having a noise filter 8a and a second noise filter 8b connected between the commercial power source 7 and the switching power source 6 is provided, and a main unit unit housing 10 constituting the main unit 5 is formed of a conductive magnetic material. The main body unit 5 and the subunit 9 are configured to prevent noise interference (see, for example, Patent Document 1).
JP 2007-311244 A

  However, in the conventional configuration, a noise filter must be configured as a unit separately from the main body. In particular, an induction heating cooker incorporated in a kitchen is easy to install from the opening hole on the top surface of the kitchen, and the interior of the kitchen. Due to structural or space limitations, it was difficult to construct a noise filter outside the main body. Further, 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, but a current of about 29 A flows through a noise filter arranged in the power supply unit, and the electric power in the noise filter The temperature rise of the parts due to the resistance also increases, and depending on the parts, cooling is required, and thus there is a problem of cooling the parts of the noise filter configured separately from the main body.

  The present invention solves the above-described conventional problems, and can dispose a noise filter in a restricted main body and perform cooling so that the temperature rise of the noise filter component is less than the component temperature allowable value. An object of the present invention is to provide an induction heating cooker having improved noise shielding performance from leakage magnetic flux from a heating coil to a noise filter and electromagnetic noise emitted from a switching power supply.

  In order to solve the above-mentioned conventional problems, an induction heating cooker according to the present invention includes a fan that sucks air outside the cooker body, and a substrate base provided on the downstream side of cooling air blown substantially rearward by the fan. A circuit board for controlling the output of the held heating unit, a noise filter board attached to a noise filter board holder on the outer rear side behind the circuit board, and a power cord arranged in the outer rear side below the noise filter board A power supply connection portion and a filter cover formed of metal surrounding the front and left and right sides of the noise filter substrate and the power cord power supply connection portion are provided.

By this, the noise filter board and the filter cover formed by the metal surrounding the power cord power supply connection front and left and right, noise shielding performance from the magnetic flux leaked from the heating coil to the noise filter and electromagnetic noise generated from the switching power supply Can be improved. In addition, the cooling air blown by the fan that sucks the air outside the cooker body is ventilated in the filter cover, and a ventilation path for exhausting the filter cover above the noise filter is provided. It can cool and can suppress the temperature rise destruction by component heat_generation | fever. Further, since the noise filter is configured in the main body, the noise filter does not get in the way when the main body is set by being inserted through the opening hole above the kitchen, and can be set smoothly.

  The induction heating cooker of the present invention includes a noise filter within the body constraints, cools the noise filter components, and shields noise from magnetic flux leaked from the heating coil to the noise filter and electromagnetic noise generated from the switching power supply. The performance can be improved.

  1st invention, the main body outer shell which comprises an outer shell, the top plate which mounts the to-be-heated material provided in the main body upper part, the heating coil which carries out the induction heating of the said to-be-heated material provided below the top plate, The roaster provided on one of the left and right sides of the main body, the roaster partition plate provided in the approximate center of the main body next to the roaster, and the outer front surface of the main body on the opposite side of the roaster across the roaster partition plate An opening / closing operation unit, an operation unit case that has a gap with the operation unit and accommodates the operation unit, an opening hole provided in the main body of the operation unit case, and a main body behind the operation unit case A fan that sucks air outside the cooker body through the opening of the operation unit case from the gap between the operation unit and the operation unit case, and a substrate base provided on the downstream side of the cooling air blown substantially rearward by the fan. heating Circuit board for controlling the output of the power supply, the noise filter board attached to the noise filter board holder on the outer rear side behind the circuit board, and the power source of the power cord inserted through the outer rear side opening hole below the noise filter board A cord power supply connection portion, a filter cover formed of metal surrounding the front and left and right of the noise filter substrate and the power cord power supply connection portion, and an exhaust port serving as an outlet for cooling air provided at the upper rear portion of the outer body of the main body are provided. By the filter cover formed by the metal surrounding the noise filter board and power cord power supply connection part and the left and right, noise shielding performance from the magnetic flux leakage from the heating coil to the noise filter and electromagnetic noise generated from the switching power supply Can be improved.

  In addition, the cooling air blown by the fan that sucks the air outside the cooker body is ventilated in the filter cover, and a ventilation path for exhausting the filter cover above the noise filter is provided. It can cool and can suppress the temperature rise destruction by component heat_generation | fever.

  Further, since the noise filter is configured in the main body, the noise filter does not get in the way when the main body is set by being inserted through the opening hole above the kitchen, and can be set smoothly.

  In the second invention, in particular, since the outer shell of the first invention is made of metal and connected to the ground, and the filter cover is brought into contact with the ground, the heating coil is connected to the ground as a ground potential portion. Since the leakage magnetic flux generated in step 1 is shielded by the outer shell of the main body and the filter cover and absorbed by the ground as the ground potential portion, the noise shielding performance can be improved.

  According to the third aspect of the invention, in particular, the power cord ground connection portion of the first invention is tightened under the noise filter substrate at the outer rear side and the power cord ground tightening portion is covered with the filter cover. Near the power cord main body insertion port and at the rear lower part of the main body, the distance from the switching power supply and heating coil is far and shielded by the filter cover. Noise shielding performance from electromagnetic noise generated can be improved.

In the fourth aspect of the invention, in particular, a rib that abuts the outer bottom of the filter cover from the fan to the lower hole of the filter cover is provided on the lower surface of the substrate base of the first aspect of the invention, thereby sucking air outside the cooker body. A ventilation path that vents the cooling air blown by the fan to the inside of the filter cover and exhausts it to the outside of the filter cover above the noise filter can cool the components of the noise filter directly from the fan, and the parts generate heat Temperature rise destruction due to can be suppressed.

  In the fifth aspect of the invention, in particular, by providing an opening hole at an arbitrary position of the filter cover of the first aspect of the invention, the cooling air blown by the fan that sucks air outside the cooker body is ventilated in the filter cover. As a result, the ventilation area to be exhausted can be increased, the cooling of the noise filter components can be improved, and the temperature rise destruction due to the heat generation of the components can be suppressed.

  In the sixth invention, in particular, a magnetic underframe that supports the top plate of the first invention is provided in the lower part of the plate, and the upper part of the noise filter substrate is covered with the underframe. Is shielded by the underframe, and the noise shielding performance to the noise filter can be improved.

  According to the seventh aspect of the invention, in particular, a part of the filter cover of the second aspect of the invention is configured to be tightened to the metal outer shell by screws, so that the leakage magnetic flux generated by the heating coil is shielded by the main body outer shell and the filter cover. In addition, since the filter cover is reliably connected to the ground by screwing and is absorbed by the ground as a ground potential portion, the noise shielding performance can be improved.

  In the eighth aspect of the invention, in particular, by providing a partition plate between the roaster of the first aspect of the invention, the substrate base, the filter cover, the fan, and the operation unit, the thermal influence from the roaster is reduced, and the noise filter The cooling of the component parts can be improved, and the temperature rise destruction due to the heat generation of the parts can be suppressed.

  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 shows a cross-sectional view of an induction heating cooker according to the first embodiment of the present invention. FIG. 2 is a schematic perspective view showing the internal configuration of the induction heating cooker according to the first embodiment of the present invention. FIG. 3 shows a detailed view of a noise filter mounting portion of the induction heating cooker according to the first embodiment of the present invention. FIG. 4 shows a block diagram of the induction heating cooker in the first embodiment of the present invention.

  In FIG. 1, a main body shell 11 of an induction heating cooker made of metal is inserted and installed from an upper surface opening of a 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 (FIG. 2) on the left side, and a top side of the top unit 13 in the outer shell 11 on the right side. A right heating coil 16b (FIG. 2) is placed.

  Also, on the left side of the main body, a roaster 17 (FIG. 2) 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 (FIG. 4), an inverter circuit 21, a switching power supply 22, and a control circuit 23.

  In addition, a fan 24 that sends cooling air into the outer shell of the main body is provided near the front side of the circuit board 19, and an operation unit 25 that performs heating operation setting is provided on the front side of the fan. A noise filter substrate 27 attached to the noise filter substrate holder 26 is provided on the outer rear side surface behind the circuit board, and the power cord power connection portion 29 of the power cord 28 inserted from the outer rear side opening hole below the noise filter substrate. Is connected to the lower terminal block of the noise filter substrate by terminal screws.

  Further, the power cord ground connection portion 30 is connected by being tightened to the outer rear side surface below the noise filter substrate.

  A metal filter cover 31 is formed so as to surround the front and left and right sides of the noise filter substrate, the power cord power supply connection portion, and the power supply cord ground connection portion 30, and the filter cover 31 is set so as to abut against the outer rear side surface. The filter cover screw tightening portion 32 (FIG. 2) provided in a part of the filter cover is sandwiched between the main body outer rear side and the under frame 15 and is tightened together with screws. Covers the top of the filter substrate.

  The power cord 28 has a three-wire integrated configuration in which two power connection wires and one ground wire are bundled.

  The filter cover 31 is provided with a filter cover ventilation hole 33 as long as any noise shielding effect is not impaired.

  Furthermore, a rib 34 is provided on the lower surface of the substrate base 18 so as to come into contact with the outer bottom constituting the ventilation path from the fan 24 to the filter cover pilot hole. A metal partition plate 35 (FIG. 2) is arranged between the roaster 17, the substrate base 18, the filter cover 31, the fan 24, and the operation unit 26. In addition, an exhaust port 36 (FIG. 2) serving as an outlet for cooling air is provided in an upper portion of the main body at the rear rear side.

  The operation unit 25 is built in an operation unit case 37 that forms the outside of the operation unit, and the operation unit 25 is housed in the operation unit case 37 by opening and closing or exposed to the outside of the operation unit case 37. ing.

  The operation unit 25 includes an operation push button unit 38 disposed on the top, an operation board 39 having a switch for detecting operation of a button provided below the operation push button unit 38 and transmitting a signal to the circuit board, An operation substrate base 40 that supports the operation substrate 39, a left and right support portion 41 that supports the operation substrate base in the left-right direction, and a front plate 42 that covers the operation substrate base and the front surfaces of the left and right support portions.

  In addition, an operation unit upper surface convex portion having a width of about 50 mm is provided in the approximate center of the upper surface of the operation unit 25, and a downward convex portion having a width of about 50 mm is provided in the approximate center of the upper surface of the operation unit case. The shaft 43 is passed through the left and right lower parts of the left and right support parts and the side part of the operation part case 37 opposite to the left and right support parts, and the operation part 25 is accommodated in the operation part case by opening and closing and turning around this part. The part case 37 is exposed to the outside.

  Under the present circumstances, the operation part upper surface convex part provided in the back of the upper surface of the operation part 25 rotates with the clearance gap between the inner surface of an operation part case. When the operation part 25 is opened, the operation part upper surface convex part comes into contact with the downward convex part provided on the upper surface of the operation part case, and the rotation stops.

  An operation unit case opening hole 44 provided in the operation unit case 37 behind the operation unit is provided, and a continuous ventilation path is formed with a gap of about 4 mm between the operation unit case 37 and the operation unit 25.

  The fan 24 is located in the back of the operation unit case 37, and the circuit board 19 is disposed in the back of the fan 24. The fan intake port 45 is on the operation unit case side, and the exhaust port is on the circuit board side.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

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

  First, outside air enters through a gap of about 4 mm between the operation unit case 37 and the operation unit 25, passes through the operation unit case opening hole 44 provided in the operation unit case 37 at the rear of the operation unit, and enters the fan intake port. It is sucked into 45.

  The sucked air is roughly divided into four paths.

  The first path is ejected from the fan 24 to a ventilation path that is formed by a rib 34 that abuts the outer bottom provided on the lower surface of the substrate base 18 and communicates with the filter cover pilot hole. The cooling air blown into the lower hole is discharged from the hole above the filter cover 31 through the ventilation path having the filter cover 31 and the noise filter substrate 27 formed on the outer rear side of the filter cover 31, and further to the rear of the main body top unit. This is a path that is exhausted out of the flow to the provided exhaust port 36 (FIG. 2).

  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 fan 24, and thereafter the noise shielding effect of the rear filter cover 31 is not impaired. A path that flows into the opened filter cover vent hole 33, is discharged from a hole above the filter cover 31 or another filter cover vent hole, and further flows out to the exhaust port 36 provided at the rear of the main body top unit. It is.

  The third path is a path that is discharged out of the flow to the exhaust port 36 provided at the rear of the main body top unit while passing through the right heating coil 16b by the fan 24.

  The fourth path is a path that is discharged out of the flow to the exhaust port 36 provided at the rear of the main body top unit while being routed by the fan 24 through the left heating coil 16a.

  The noise filter substrate 27 includes a coil and a capacitor. In particular, the coil is a component that requires a countermeasure against cooling with large self-heating, and depending on the arrangement of the component, the temperature of a nearby capacitor may be increased.

  The first path of this configuration is ejected from the fan 24 to the ventilation path leading to the filter cover pilot hole formed by the rib 34 abutting against the outer bottom provided on the lower surface of the substrate base 18, and the filter cover passes through the ventilation path. The noise filter substrate 27 is blown into the lower hole, passes through the ventilation path having the noise filter substrate 27 formed on the filter cover 31 and the outer rear side surface, and is discharged from the hole above the filter cover 31. Coils and capacitors can be cooled.

Moreover, the cooling effect can be improved by configuring a direct ventilation path from the fan 24.

  In addition, the second path is blown to the circuit board 19 having a heat generating component such as a switching element or a diode bridge attached to the board base 18 by the fan 24, and then the noise shielding effect of the rear filter cover 31 is not impaired. It flows into the filter cover vent hole 33 opened in the range, is discharged from the hole above the filter cover or another filter cover vent hole, and further flows out to the exhaust port 36 provided at the rear of the main body top unit. With the ventilation path configuration, a portion where the cooling effect cannot be obtained in the first path above the noise filter substrate 27 can be locally cooled, and the cooling of the entire noise filter substrate 27 is improved together with the first path. Can be effective.

  At this time, the partition plate 35 (FIG. 2) can shield the thermal effect from the roaster during the roaster heating, reduce the thermal effect on the cooling path on the right side of the main body, and improve the cooling performance of the noise filter substrate. Can be done.

  Next, circuit connection and circuit operation will be described.

  In FIG. 4, the power cord power connection portion 29 of the power cord 28 is connected to the noise filter substrate 27 in order to connect the commercial power source and the device.

  The noise filter substrate 27 and the rectifier circuit 20 of the circuit substrate 19 are connected, the rectifier circuit 20 and the inverter circuit 21 are connected in the circuit substrate 19, and a heating coil is connected to the inverter circuit 21.

  The noise filter substrate 27 and the switching power supply 22 on the circuit board 19 are connected, 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 substrate 27 prevents the generated switching noise from leaking to the commercial power supply line. 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 to generate a high frequency current in the heating coils 16a and 16b. 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 23 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 substrate 27 is for preventing switching noise generated from leaking into the power line of the commercial power supply. However, the noise filter substrate 27 has a reduced noise blocking performance due to the influence of leakage magnetic flux generated by other components. Resulting in.

Therefore, in this configuration, a metal filter cover 31 is formed so as to surround the front and left sides of the noise filter substrate 27, the power cord power supply connection portion 29, and the power supply cord ground connection portion 30, and the filter cover 31 is formed on the rear side surface of the outer shell. The filter cover screw tightening portion 32 (FIG. 2) provided in a part of the filter cover 31 is sandwiched between the main body outer rear side surface and the under frame 15 and is tightened together with screws. Because it is connected to the ground as the ground potential portion, leakage magnetic flux generated by the heating coil and electromagnetic noise generated from the switching power supply are shielded by the main body and the filter cover and absorbed by the ground as the ground potential portion. Therefore, noise shielding performance can be improved.

  In addition, the noise filter substrate 27 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 coils 16a and 16b, thereby reducing the influence of the leakage magnetic flux generated by other components on the noise filter substrate 27. can do.

  Further, by providing a power cord main body insertion port below the noise filter substrate 27, the distance from the switching power supply 22 and the heating coils 16a and 16b can be increased, and the leakage magnetic flux generated by other components from the noise filter substrate 27 is commercialized. It is possible to reduce the influence between the power cords 28 that are power lines.

  Further, since the power cord power connection portion 29 of the power cord 28 inserted through the outer rear side surface opening hole below the noise filter substrate 27 is connected to the lower terminal block of the noise filter substrate 27 by a terminal screw, the main body The length of the lead of the power cord until the power cord 28 is inserted into the board 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. 27, the influence between the power cords 28, which are commercial power lines, can be reduced.

  Since the power cord ground connection portion 30 is connected to the outer rear side surface by being clamped below the noise filter substrate 27, the length of the lead can also be shortened and the lead affected by the leakage magnetic flux generated by other components can be reduced. Since the length is short, the influence on the ground wire can be reduced, and the influence on the power cord 28 which is a commercial power supply line from the noise filter substrate 27 of the power cord 28 in which the three wires are integrated is reduced. Can do.

  Further, by adopting a configuration in which the upper portion of the noise filter substrate is covered with a metal underframe, the leakage magnetic flux generated by the heating coil is shielded by the underframe, and the noise shielding performance to the noise filter can be improved.

  In addition, since a part of the filter cover 31 is fastened to the metal main body with screws, the filter cover is securely connected to the ground by screwing, and the leakage magnetic flux generated by other parts is used as a ground potential part. Since it is absorbed by the ground, the noise shielding performance can be improved.

  As described above, in the present embodiment, the magnetic flux leakage from the heating coil to the noise filter substrate and the switching power supply by the filter cover formed by the metal surrounding the front and left and right of the noise filter substrate and the power cord power supply connection portion. The noise shielding performance from the electromagnetic noise emitted from can be improved.

  In addition, the cooling air blown by the fan that sucks the air outside the cooker body is ventilated in the filter cover, and a ventilation path for exhausting the filter cover above the noise filter is provided. It can cool and can suppress the temperature rise destruction by component heat_generation | fever.

Furthermore, the outer shell of the main body is made of metal and connected to the ground, and the filter cover is brought into contact with the ground as a ground potential portion. Since it is shielded by the cover and absorbed by the ground as the ground potential portion, the noise shielding performance can be improved.

  In addition, the power cord ground connection portion is tightened under the noise filter substrate at the outer rear side and the power cord ground tightening portion is covered with the filter cover, so that the ground connection portion is located near the power cord main body insertion port and the main body. Since the distance from the switching power supply and heating coil is far behind and shielded by the filter cover, the noise shielding performance from the magnetic flux leaked from the heating coil to the noise filter and electromagnetic noise generated from the switching power supply is improved. be able to.

  In addition, a metal under frame that supports the top plate is provided at the bottom of the plate, and the noise filter substrate upper part is covered with the under frame, so that the leakage magnetic flux generated by the heating coil is shielded by the under frame, and is applied to the noise filter. Noise shielding performance can be improved.

  In addition, since a part of the filter cover is tightened to the metal outer shell with screws, the leakage flux generated by the heating coil is shielded by the main body outer shell and the filter cover, and the filter cover is securely tightened. Therefore, the noise shielding performance can be improved.

  Furthermore, by providing a rib on the lower surface of the substrate base that abuts the outer bottom of the filter cover from the fan to the bottom hole of the filter cover, the cooling air blown by the fan that sucks air outside the cooker body is filtered. A ventilation path that ventilates inside the cover and exhausts outside the filter cover above the noise filter can be configured, and the components of the noise filter can be directly cooled from the fan, and temperature rise destruction due to component heat generation can be suppressed.

  And by providing an opening hole in any part of the filter cover, it is possible to increase the ventilation area that ventilates the cooling air blown by the fan that sucks the air outside the cooker body into the filter cover. In addition, the cooling of the noise filter components can be improved, and the temperature rise destruction due to the heat generation of the components can be suppressed.

  And by providing a partition plate between the roaster and the substrate base, the filter cover, the fan, and the operation unit, it is possible to reduce the thermal effect from the roaster and improve the cooling of the noise filter components, Temperature rise destruction due to component heat generation can be suppressed.

  Further, since the noise filter is configured in the main body, the noise filter does not get in the way when the main body is set by being inserted through the opening hole above the kitchen, and can be set smoothly.

  As described above, the induction heating cooker according to the present invention enables cooling of the noise filter and noise shielding from others in the main body, and is not limited to household use and business use. This is effective for induction heating cookers that require noise shielding from the outside and have restrictions outside the main unit.

Sectional drawing of the induction heating cooking appliance in Embodiment 1 of this invention The perspective schematic diagram which shows the structure inside the induction heating cooking appliance in Embodiment 1 of this invention. Detailed view of noise filter mounting portion of induction heating cooker in embodiment 1 of the present invention The block diagram of the induction heating cooking appliance in Embodiment 1 of this invention Block diagram of a conventional induction heating cooker

Explanation of symbols

2, 20 Rectifier circuit 3, 21 Inverter circuit 4, 23 Control circuit 5 Main unit 6, 22 Switching power supply 7 Commercial power supply 8a First noise filter 8b Second noise filter 9 Sub unit 10 Main unit unit case 11 Main unit outline 12 Kitchen 13 Top unit section 14 Top plate 15 Under frame 16a Left heating coil 16b Right heating coil 17 Roaster 18 Board base 19 Circuit board 24 Fan 25 Operation section 26 Noise filter board holder 27 Noise filter board 28 Power cord 29 Power cord power connection section 30 Power cord ground connection 31 Filter cover 32 Filter cover screw tightening part 33 Filter cover ventilation hole 34 Abutment rib 35 Middle partition plate (Roaster partition plate)
36 Exhaust port 37 Operation part case 38 Operation push button part 39 Operation board 40 Operation board base 41 Left and right support part 42 Front plate 43 Shaft 44 Operation part case opening hole (opening hole provided inside main body of operation part case)
45 Fan inlet

Claims (8)

The main body outer shell constituting the outer shell, the top plate for placing the heated object provided on the upper part of the main body, the heating coil for induction heating the heated object provided below the top plate, and either the left or right in the main body A roaster provided on one side of the main body, a roaster partition plate provided in the approximate center of the main body beside the roaster, and an opening-and-closing operation unit provided in front of the outer surface of the main body on the opposite side of the roaster across the roaster partition plate; An operation unit case having a gap with the operation unit and accommodating the operation unit, an opening hole provided in the main body of the operation unit case, and an operation unit and an operation unit provided in the main body behind the operation unit case Controls the output of the heating unit held by the fan that sucks air outside the cooker body through the opening of the operation unit case from the gap of the case and the substrate base that is provided downstream of the cooling air blown substantially backward by the fan Circuit board, a noise filter board attached to a noise filter board holder on the outer rear side behind the circuit board, and a power cord power connection part of the power cord inserted from the outer rear side opening hole below the noise filter board And an induction heating cooker provided with a filter cover formed of metal surrounding the front and left and right sides of the noise filter substrate and the power cord power supply connection portion, and an exhaust port serving as an outlet for cooling air at the upper rear portion of the main body. The induction heating cooker according to claim 1, wherein the outer shell of the main body is made of metal and connected to the ground, and the filter cover is brought into contact therewith. The induction heating cooker according to claim 1, wherein the power cord ground connection portion is tightened under the outer side of the outer side of the noise filter substrate and the power cord ground tightening portion is covered with a filter cover. The induction heating cooker according to claim 1, wherein a rib is provided on the lower surface of the substrate base so as to abut the outer bottom of the airflow path from the fan to the filter cover pilot hole. The induction heating cooker of Claim 1 which provided the opening hole in the arbitrary locations of the filter cover. The induction heating cooker according to claim 1, wherein a metal under frame that supports the top plate is provided at a lower portion of the plate, and the upper portion of the noise filter substrate is covered with the under frame. The induction heating cooker according to claim 2, wherein a part of the filter cover is fastened to a metal main body shell with a screw. The induction heating cooker according to claim 1, wherein a roaster partition plate is provided between the roaster and the substrate base, the filter cover, the fan, and the operation unit.