JP2011154964A - Induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooker capable of efficiently cooling both a roaster part getting extremely high in temperature and a driving circuit part which is lower in temperature than the roaster part but must be fully cooled to strictly control an operation temperature. <P>SOLUTION: The induction heating cooker is provided with a roaster part arranged in a body case, a blowing fan, heating coils, and a driving circuit part. A body exhaust port of the body case is fitted at a rear part of the top face of the case, and a fan exhaust port of the blowing fan is on a downstream side of the heating coils, the roaster part and the driving circuit and on an upstream side of the body exhaust port, while a chamber exhaust port of high-temperature air circulation channel surrounding the roaster part is coupled in parallel with the fan exhaust port on an upstream side of the body exhaust port. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an induction heating cooker, and more particularly, to an induction heating cooker having a structure for efficiently cooling various heat generating components in a casing.

  The conventional induction heating cooker described in Patent Document 1 uses a single cooling fan to cool the various heat-generating components in the casing, and draws ambient air from the inlet adjacent to the rear surface of the casing. Intake air into the upper unit of the housing, cool by applying airflow to the inverter unit and induction heating coil arranged in series in the airflow direction, and similarly exhaust from the exhaust port adjacent to the rear surface of the housing .

JP-A-11-87038 (FIGS. 1 and 3)

  However, the induction heating cooker described in Patent Document 1 has a long flow path (air flow path) through which airflow flows due to the structure of continuously blowing air to the inverter units and induction heating coils arranged in series, In addition, since it is bent, the cross section perpendicular to the airflow direction of the air passage is further rapidly reduced or expanded, so that the airflow resistance (pressure loss) is large. For this reason, in order to obtain a sufficient cooling effect, it is necessary to use a high-lifting cooling fan, and it is difficult to suppress noise generated from the cooling fan, and it is possible to sufficiently meet the demand for downsizing. There wasn't.

  According to the induction heating cooker described in Patent Literature 1, the induction heating coil on the downstream side of the air passage is cooled by the high-temperature airflow after the inverter unit or the like is cooled, so that the induction heating coil is sufficiently cooled. I can't. In addition, in the induction heating cooker of Patent Document 1, since both the intake port and the exhaust port are disposed adjacent to the rear surface of the housing, the airflow flowing directly under the induction heating coil flows from the front to the rear of the housing. The induction heating coil cannot be uniformly cooled in the radial direction, and a part (hot spot) that becomes extremely high is likely to be generated in a part of the induction heating coil. That is, in this induction heating cooker, the induction heating coil is overheated and a non-uniform temperature distribution is generated, which may adversely affect the reliability of the induction heating coil.

  Furthermore, generally, the surface temperature of the roaster disposed in the casing reaches 250 ° C. or higher, becomes higher than other components (inverter unit and induction heating coil), and cools the radiant heat radiated from the roaster and the roaster. The inverter unit or the induction heating coil may be indirectly heated by the high temperature air, and many conventional induction heating cookers have not provided a sufficiently efficient cooling structure.

  The present invention has been made in order to solve the above-described problems. Other configurations such as a roaster that is extremely hot and a drive circuit component that is relatively cooler than the roaster but should be sufficiently cooled. An object of the present invention is to provide an induction cooking device having a cooling structure capable of efficiently cooling parts.

  An induction heating cooker according to the present invention has a roaster section, a blower fan, a heating coil, and a drive circuit section disposed in a main body casing, and a main body exhaust port of the main body casing is located behind the upper surface of the main body casing. The fan exhaust port of the blower fan is provided on the downstream side of the heating coil, the roaster unit, and the drive circuit, and is provided on the upstream side of the main body exhaust port, and surrounds the roaster unit A chamber exhaust port of the ventilation path is connected in parallel with the fan exhaust port on the upstream side of the main body exhaust port.

  According to the induction heating cooker according to the present invention, it is possible to efficiently cool the roaster portion that is extremely hot and the drive circuit portion that is cooler but sufficiently cooled to strictly control the operating temperature. Can do.

It is a schematic perspective view which shows the induction heating cooking appliance of Embodiment 1 which concerns on this invention. It is a partially broken perspective view of the induction heating cooker with the top plate and a part of the main body casing removed to expose the internal structure of the main body casing. It is a top view of an induction heating cooking appliance when a top plate is removed. It is sectional drawing seen from the IV-IV line of FIG. 1 and FIG. It is sectional drawing seen from the VV line of FIG. 1 and FIG. It is an expansion perspective view of the exhaust unit which concerns on this invention. It is the partially broken perspective view similar to FIG. 2 which exposed the internal structure of the induction heating cooking appliance of Embodiment 2. FIG. It is a top view similar to FIG. 3 of the induction heating cooking appliance of Embodiment 2. FIG. It is sectional drawing similar to FIG. 4 of the induction heating cooking appliance of Embodiment 3. It is sectional drawing similar to FIG. 5 of the induction heating cooking appliance of Embodiment 3. It is a top view similar to FIG. 8 of the induction heating cooking appliance of Embodiment 4.

  Embodiments of an induction heating cooker according to the present invention will be described below with reference to the accompanying drawings. In the description of each embodiment, terms representing directions (for example, “up”, “down”, “right”, “left”, “X direction”, “Y direction”, and “ Z direction ”and the like are used as appropriate, but this is for explanation, and these terms do not limit the present invention. In the accompanying drawings, the same components are referred to by the same reference numerals.

Embodiment 1:
The first embodiment of the induction heating cooker according to the present invention will be described in detail below with reference to FIGS. FIG. 1 is a perspective view schematically showing an induction heating cooker 1 according to the present invention. In FIG. 1, an induction heating cooker 1 schematically includes a main body housing 2, a top plate 3 formed of glass or the like covering substantially the entire upper surface thereof, and a pair of induction heating portions 4 a arranged symmetrically on the left and right. , 4b, a radiant heating unit 5, and a roaster unit 6 that is arranged on the left side of the main body housing 2 in the drawing. That is, the induction heating cooker 1 according to the first embodiment has a so-called side roaster structure in which the roaster portion 6 is arranged eccentric from the center position. The radial heating unit 5 may be an induction heating unit.

  The induction heating cooker 1 also includes output adjustment dials 8a and 8b used for the user to operate the induction heating units 4a and 4b, the radiant heating unit 5 and the roaster unit 6, and a liquid crystal for displaying the control states thereof. A display unit 9 is provided. Furthermore, the induction heating cooker 1 has a main body inlet 12 disposed on the right side of the roaster portion 6 in the figure on the front surface 10 parallel to the XZ plane, and a main body outlet 14 on the top plate 3 close to the rear surface 11. And have.

FIG. 2 is a partially broken perspective view of the induction heating cooker 1 with the internal structure exposed by removing the top plate 3 (and a heat-insulating top plate 26 described later) and a part of the main body housing 2 in FIG. is there. FIG. 3 is a plan view of the induction heating cooker 1 when the entire top plate 3 (and the heat insulating top plate 26) of FIG. 1 is removed. 4 and 5 are cross-sectional views taken along lines IV-IV and VV in FIGS. 1 and 3 (cut along the YZ plane), respectively.
The roaster unit 6 includes a roaster housing 20 having a roaster ventilation port 21, and upper and lower sheathed heaters 22 a and 22 b disposed in the roaster housing 20, and oil smoke generated in the roaster housing 20. A purification filter 46 containing a catalyst for decomposing and deodorizing odors is provided at the roaster ventilation port 21 (FIG. 4).
Each induction heating unit 4 includes a heating coil 24 wound in a spiral shape on a predetermined XY plane parallel to the top plate 3 below the top plate 3 (FIGS. 4 and 5).

  The induction heating cooker 1 has a pair of drive circuit units 30a and 30b for supplying a high-frequency current to the heating coil 24 of the induction heating unit 4 (FIGS. 2, 3 and 5), and each drive circuit unit. 30a and 30b have heat sinks 32a and 32b for efficiently cooling an IGBT chip that has been heated to a high temperature, in which an IGBT chip and an FWD chip that are controlled in a predetermined cycle are mounted on a wiring board. In this embodiment, the wiring board is arranged in parallel to the XY plane.

Moreover, the induction heating cooker 1 which concerns on this invention has the exhaust unit 60 which consists of the exhaust duct 40 and the attraction | suction duct 50, FIG.
The exhaust duct 40 is formed of a substantially L-shaped or V-shaped cylindrical metal hollow structure having an inlet opening 42 and an outlet opening 44, and is interposed between the inlet opening 42 and the outlet opening 44. A duct opening 48 is provided.
As described above, the purification filter 46 is disposed in the roaster ventilation port 21. Alternatively, the purification filter 46 may be provided adjacent to the inlet opening 42 of the exhaust duct 40 as shown in FIG.

  On the other hand, the induction duct 50 is formed of a cylindrical resin hollow structure having an airflow intake port 52, and the duct opening of the exhaust duct 40 is in fluid communication with the airflow intake port 52 and the outlet opening 44. It is connected to the part 48. Further, the induction duct 50 is provided with a blower fan 54 adjacent to the airflow inlet 52, and the air taken in from the airflow inlet 52 is passed through the duct opening 48 and the outlet opening 44 to the main body casing. The main body exhaust port 14 is configured to exhaust exhaustively. At this time, since the high temperature air flowing from the roaster housing 20 to the exhaust duct 40 does not enter the induction duct 50, the blower fan 54 is not exposed to the high temperature air, avoiding damage or deterioration due to the high temperature air, High reliability can be maintained.

  Further, the induction heating cooker 1 according to the present invention is provided with a heat insulating side wall 25 between the roaster housing 20 and the drive circuit portions 30a and 30b (wiring boards), so that radiant heat from the high temperature roaster housing 20 is driven to the drive circuit. This prevents heat from being directly transferred to the portions 30a and 30b and prevents air heated on the surface of the high-temperature roaster housing 20 from indirectly heating the drive circuit portions 30a and 30b. Yes (Figures 2 and 3).

In addition, between the roaster housing 20 and the heating coil 24, the air heated on the surface of the high-temperature roaster housing 20 is suppressed or prevented as much as possible by the air heated on the surface of the roaster housing 20. In order to block the radiant heat from the body 20, it is necessary to provide a heat-insulating top plate 26 (FIGS. 4 and 5).
Furthermore, a heat insulating end wall 27 is also provided between the roaster housing 20 and the exhaust unit 60 in order to avoid as much as possible that the air heated on the surface of the high temperature roaster housing 20 is heated by the resin induction duct 50. It is preferable (FIGS. 2 to 4).

  That is, the roaster housing 20 according to the present invention is constituted by the heat insulating side wall 25 (and the left side plate 15 of the main body housing 2), the heat insulating top plate 26 (and the bottom plate 17 of the main body housing 2), and the heat insulating end wall 27. It is surrounded by a roaster housing enclosure chamber (high temperature chamber) 28. The high temperature chamber 28 includes a chamber exhaust port 29 to which an inlet opening 42 of the exhaust duct 40 is connected (FIG. 2), and a chamber intake port (not shown) for taking in ambient air on the front surface 10 side of the main body housing 2. ). That is, the high temperature chamber 28 forms a high temperature air ventilation path between the chamber intake port and the chamber exhaust port 29.

  On the other hand, the drive circuit units 30a and 30b according to the present invention are configured by the heat insulating side wall 25 (and the right side plate 16 of the main body housing 2) and the heat insulating top plate 26 (and the bottom plate 17 of the main body housing 2). It is surrounded by an enclosure chamber (low temperature chamber) 34, and the low temperature chamber 34 communicates with the main body inlet 12 of the main body housing 2 and the air flow inlet 52 of the induction duct 50. That is, the low temperature chamber 34 forms a low temperature air ventilation path between the main body inlet 12 of the main body housing 2 and the air flow inlet 52 of the induction duct 50 (the duct opening 48 of the exhaust duct 40). .

Similarly, the heating coil 24 of the induction heating unit 4 includes a heating coil surrounding chamber (coil chamber) 36 (FIG. 5) formed by the top plate 3, the heat insulating top plate 26, and the left and right side plates 15 and 16 of the main body housing 2. ). Note that the high temperature chamber 28, the low temperature chamber 34, and the coil chamber 36 do not need to form a completely sealed space, but define the space to such an extent that the air flow path can be controlled, as will be described later. I just need it. That is, although not specifically described here, the coil chamber 36 is similarly provided with a coil inlet for taking in ambient air, a flow path for forming an air flow in the coil chamber 36 to cool the heating coil 24, A coil exhaust port for exhausting high temperature air to the outside of the main body housing 2 (both not shown). In other words, the coil chamber 36 forms a coil air ventilation path between the coil intake port and the coil exhaust port.
The heat insulating top plate 26 may have a circular planar shape that is disposed only directly below the heating coil 24.

Next, the operation of the induction heating cooker 1 according to the present invention and the air flow (airflow) in the main body housing 2 during the operation will be described.
When the user operates the output adjustment dial 8 to drive the induction heating unit 4, a high-frequency current is supplied to the heating coil 24, and at the same time, the blower fan 54 in the induction duct 50 is driven, and the air flow inlet 52 Air in the cold chamber 34 is taken into the induction duct 50. At this time, the static pressure in the low temperature chamber 34 is reduced, cold (room temperature) ambient air outside the main body housing 2 is taken in from the main body inlet 12, and an air flow indicated by an arrow is formed in the low temperature chamber 34. (FIGS. 2, 3 and 5). This air current hits the IGBT chip and the heat sinks 32 a and 32 b that are heated to a high temperature by supplying a high frequency current, efficiently cools the drive circuit portions 30 a and 30 b, and is taken into the induction duct 50.

  The air taken into the induction duct 50 is accelerated by the blower fan 54 and guided into the exhaust duct 40, and then the outlet opening 44 of the exhaust duct 40 (and the main body outlet to which the outlet opening 44 is connected). It is exhausted vigorously as a high-speed air stream toward 14).

  Similarly, when the sheathed heaters 22a and 22b of the roaster section 6 are heated by a user operation, oily smoke and odor generated when food such as fish in the roaster housing 20 is heated are transferred from the roaster exhaust port 21 to the high temperature chamber 28. And the air in the high temperature chamber 28 heated by the high temperature roaster housing 20 is exhausted from the chamber exhaust port 29 into the exhaust duct 40 (FIG. 4).

  However, these high-temperature air and oily smoke are gently guided from the chamber exhaust port 29 into the exhaust duct 40 by buoyancy or natural convection due to low density accompanying temperature rise, and the roaster housing 20 is sufficiently When the buoyancy and the like are not sufficiently obtained without being high in temperature, the high temperature chamber 28 may be filled with oil smoke or odor, or the oil smoke or odor may be exhausted from the chamber inlet of the high temperature chamber 28. After cooking, if oily smoke or odor is not exhausted to the outside of the main body housing 2 through the exhaust duct 40 (purification filter 46) and stays in and adheres to the high temperature chamber 28 as well as in the roaster section 6, Since it is difficult to clean and deodorize, it is very unsanitary and uncomfortable to the user.

  However, according to the exhaust unit 60 according to the present invention, the oil smoke and odor guided into the exhaust duct 40 are attracted (drawn) by the high-speed airflow exhausted from the induction duct 50 and efficiently the main body casing 2. Can be exhausted to the outside, and can be reliably decomposed and deodorized by the purification filter 46.

  As described above, according to the induction heating cooker 1 according to the present invention, the exhaust unit 60 is used to efficiently cool the roaster section 6 in the high temperature chamber 28 and cool the roaster casing 20 in the high temperature chamber 28. By separating the high-temperature airflow after cooling and the relatively low-temperature airflow after cooling the drive circuit units 30a and 30b in the low-temperature chamber 34, the high-temperature airflow after cooling the roaster housing 20 It is possible to prevent the drive circuit units 30a and 30b from being heated.

  In addition, according to the present invention, the high temperature chamber 28 is surrounded by the high temperature chamber 28, and in particular, the heat insulating side wall 25 is provided between the roaster housing 20 and the drive circuit portions 30a and 30b, so that the high temperature roaster housing is provided. The radiant heat from 20 to the drive circuit units 30a and 30b can be blocked.

  Further, according to the present invention, the main body inlet 12 is provided on the front surface 10 of the main body housing 2 and the main body outlet 14 is provided on the top plate 3 adjacent to the rear surface 11. The air resistance can be reduced, and a smaller and lower noise air blowing fan 54 can be used. Further, by arranging the main body inlet 12 and the main body outlet 14 in this manner, it is possible to prevent high-temperature air, oily smoke, etc. exhausted from the main body outlet 14 from being taken in from the main body inlet 12 again (exhausted The cooling function can be kept high using cold air (rather than hot air).

  In the embodiment described above, the single main body inlet 12 is provided on the front surface 10 of the main body housing 2, but the present invention is not limited to this, and the side plates 15, 16 of the main body housing 2 or It may be provided on the bottom plate 17. Thereby, the ventilation resistance from the main body inlet 12 to the airflow inlet 52 of the induction duct 50 is reduced, and a higher-speed airflow is jetted into the exhaust duct 40 to enhance the attraction effect by the airflow against oily smoke and odor. The exhaust efficiency of oily smoke and odor guided to the exhaust duct 40 can be improved. Further, when the induction heating cooker 1 is fitted into a concave structure (not shown) fixedly provided in a system kitchen or the like, an air flow is formed in the gap between the main body housing 2 and the concave structure. Thus, a concave structure such as a system kitchen can be cooled.

Embodiment 2:
Embodiment 2 of the induction heating cooker according to the present invention will be described in detail below with reference to FIGS. Whereas the induction heating cooker 1 according to the first embodiment has a side roaster structure, the induction heating cooker 1 according to the second embodiment has the roaster portion 6 at the center position in the main body housing 2. Except for the point that the drive circuit units 30a and 30b have a center roaster structure arranged on both sides of the roaster unit 6, the configuration is the same as that of the induction heating cooker 1 of the first embodiment. Omitted.

FIG. 7 is a partially broken perspective view similar to FIG. 2 in which the internal structure of the induction heating cooker 1 according to the second embodiment is exposed, and FIG. 8 is a diagram of the induction heating cooker 1 according to the second embodiment. 3 is a plan view similar to FIG.
In the illustrated induction heating cooker 1, the roaster section 6 is disposed in the center, and the high temperature chamber 28 surrounding the roaster housing 20 is provided with a pair of heat insulating side walls 25 a and 25 b disposed on the left and right sides of the roaster housing 20. And a heat insulating top plate 26 and a heat insulating end wall 27.
The wiring board of the second embodiment is arranged in parallel to the XY plane.
Further, the induction duct 50 according to the second embodiment has a pair of left and right air flow intake ports 52 (not shown) and is similarly arranged from the low temperature chamber 34 symmetrically disposed in the left and right in the main body housing 2. What takes in air and implement | achieves the equivalent cooling effect with respect to the drive circuit parts 30a and 30b arrange | positioned left-right symmetrically is preferable.

  In the operation of the induction heating cooker 1 according to the second embodiment, when the induction heating unit 4 is driven by a user operation, a high frequency current is supplied to the heating coil 24 and at the same time, the blower fan 54 in the induction duct 50 is driven. Then, the air in the low temperature chamber 34 is taken into the induction duct 50 from the air flow inlet 52. Here, as the blower fan 54, two sirocco fans may be provided and air may be taken in independently from the low-temperature chamber 34 arranged symmetrically, but two impellers can be simultaneously used by a single fan motor. You may provide the double sirocco fan (not shown) which takes in air simultaneously from the low temperature chamber 34 extended on either side by rotating. In addition, an axial fan, a turbo fan, or the like can be adopted as the blower fan 54, but the form of the blower fan is not limited to these.

  When the static pressure in the low temperature chamber 34 is reduced, ambient air outside the main body housing 2 is taken in from the main body inlet 12 and an air flow indicated by an arrow is formed (FIGS. 7 and 8). This airflow hits the IGBT chip and the heat sinks 32a and 32b, which are particularly high in temperature, and efficiently cools the drive circuit units 30a and 30b.

On the other hand, the air taken into the induction duct 50 is accelerated by the blower fan 54, guided into the exhaust duct 40, and then exhausted vigorously as a high-speed air stream toward the main body exhaust port 14.
Further, when the sheathed heaters 22a and 22b of the roaster section 6 are heated, oil smoke and odor are generated in the roaster housing 20, and the air in the high temperature chamber 28 heated by the high temperature roaster housing 20 is chambered with oil smoke and odor. The air is exhausted from the exhaust port 29 into the exhaust unit 60. At this time, according to the exhaust unit 60 according to the present invention, the oil smoke and odor guided into the exhaust duct 40 are attracted (drawn) by the high-speed air current ejected from the induction duct 50, and the main body casing is efficiently 2 is exhausted outside and can be reliably decomposed and deodorized by the purification filter 46. That is, the induction heating cooker 1 according to the second embodiment is similar to the first embodiment in that the high-temperature airflow after the roaster section 6 in the high-temperature chamber 28 is cooled and the drive circuit sections 30 a and 30 b in the low-temperature chamber 34. By separating the relatively low-temperature airflow after cooling, it is possible to prevent the drive circuit units 30a and 30b from being heated by the high-temperature airflow after cooling the roaster housing 20.

  Similarly, by enclosing the roaster housing 20 with the high temperature chamber 28, in particular, by providing a pair of heat insulating side walls 25a and 25b between the roaster housing 20 and the drive circuit portions 30a and 30b, a high temperature roaster housing is provided. The radiant heat from 20 to the drive circuit units 30a and 30b can be blocked.

Embodiment 3:
The third embodiment of the induction heating cooker according to the present invention will be described in detail below with reference to FIGS. 9 and 10. The induction heating cooker 1 according to the third embodiment has the same configuration as that of the induction heating cooker 1 according to the first embodiment except that a coil exhaust port 37 is provided in the heat insulating top plate 26 below the center of the heating coil 24. Therefore, the description of the overlapping contents is omitted.

FIGS. 9 and 10 are sectional views similar to FIGS. 4 and 5 of the induction heating cooker 1 according to the third embodiment, respectively, and coil exhaust provided on the heat insulating top plate 26 below the center of the heating coil 24. The mouth 37 is shown. More specifically, the coil exhaust port 37 of the heat-insulating top plate 26 shown in FIG. 9 is disposed above the roaster housing 20 and is in fluid communication with the high temperature chamber 28, as is apparent with reference to FIG. The coil exhaust port 37 of the heat insulating top plate 26 shown in FIG. 10 is disposed above the drive circuit portions 30a and 30b and is in fluid communication with the low temperature chamber 34.
However, a coil duct (not shown) that directly connects the coil exhaust port 37 of the pair of induction heating units 4a and 4b to the exhaust duct 40 of the exhaust unit 60 or the airflow intake port 52 of the induction duct 50 is provided. The efficiency of exhausting from the coil exhaust port 37 by the induction duct 50 may be improved to cool the heating coil 24 more efficiently.

  Generally, since the heating coil 24 is formed by winding a copper wire having a circular cross section in a spiral shape, the upper surface and the lower surface thereof have a shape in which unevenness is repeated in the radial direction. And the induction heating part 4 which concerns on Embodiment 3 is comprised so that the airflow in the coil chamber 36 may flow toward inner side from the radial direction outer side, and it exhausts from the coil exhaust port 37 in the center. At this time, as shown in FIGS. 9 and 10, the air flow in the coil chamber 36 flows along the front and back surfaces of the heating coil 24 (that is, the direction orthogonal to the irregularities of the heating coil 24). The same heat transfer promoting effect as that of the heat transfer surface having protrusions (irregularities) can be obtained, and cooling can be performed more efficiently.

  Also, a plurality of protrusions (not shown) are provided on the surface of the heat insulating top plate 26 facing the heating coil 24 to impart turbulent flow to the airflow in the coil chamber 36, thereby promoting heat transfer and vortex or Cooling can be performed more efficiently by promoting heat transfer by the impinging jet.

  Furthermore, since the airflow is exhausted from the peripheral part to the central coil exhaust port 37, the airflow can also flow through the gap between the top plate 3 and the heating coil 24. The airflow flowing in both can be efficiently cooled.

Embodiment 4:
The fourth embodiment of the induction heating cooker according to the present invention will be described in detail below with reference to FIG. The induction heating cooker 1 of the fourth embodiment is the same as that of the previous embodiments, except that a cooling fan 56 is provided separately for blowing and cooling directly to the heat sinks 32a, 32b of the drive circuit units 30a, 30b. Since it has the same configuration as that of the induction heating cooker 1, the description of the overlapping contents is omitted.

  FIG. 11 is a plan view similar to FIG. 8 of the induction heating cooker 1 having a center roaster structure. As described above, when the airflow sucked from the main body inlet 12 on the front surface 10 of the main body housing 2 by the blower fan 54 passes through the drive circuit units 30a and 30b, the heating coil 24, and the like, various configurations are possible. The heat sinks 32a and 32b (and IGBT chips) and the like are likely to become high temperature, and it is necessary to strictly control the allowable operating temperature in order to ensure their reliability. In some cases, a sufficient air volume (that is, a cooling effect) cannot be obtained for a certain component.

Therefore, as shown in FIG. 10, by providing a separate cooling fan 56 for directly blowing and cooling the heat sinks 32a and 32b of the drive circuit portions 30a and 30b, the heat sinks 32a and 32b and the like are more reliably provided. The cooling air can be blown to the air, and the cooling efficiency can be improved.
The cooling fan 56 may be one that is directly fixed to the heat sinks 32a and 32b and agitates the air in the low temperature chamber 34, in addition to the one that directly blows air to the heat sinks 32a and 32b. Openings may be separately provided in the side plates 15, 16, and the like to take in cold (room temperature) air from the outside, thereby efficiently cooling the components in the low temperature chamber 34.

1: induction heating cooker, 2: main body housing, 3: top plate, 4: induction heating unit, 5: radiant heating unit, 6: roaster unit, 8: output adjustment dial, 9: liquid crystal display unit, 10: front surface 11: rear surface, 12: main body inlet, 14: main body outlet, 15, 16: side plate, 17: bottom plate, 20: roaster housing, 21: roaster ventilation port, 22: sheathed heater, 24: heating coil, 25 : Heat insulation side wall, 26: heat insulation top plate, 27: heat insulation end wall, 28: roaster housing enclosure chamber (high temperature chamber), 29: chamber exhaust port, 30: drive circuit section, 32: heat sink, 34: drive circuit section enclosure Chamber (cold chamber), 36: heating coil enclosure chamber (coil chamber), 37: coil exhaust port, 40: exhaust duct, 42: inlet opening, 44: outlet opening, 46: purification filter, 48: Transfected opening, 50: attraction duct 52: air flow inlet, 54: blowing fan, 56: cooling fan, 60: exhaust unit.

Claims (10)

In an induction heating cooker having a roaster unit, a blower fan, a heating coil, and a drive circuit unit arranged in the main body casing,
A main body exhaust port of the main body casing is provided at the rear of the upper surface of the main body casing,
A fan exhaust port of the blower fan is provided on the downstream side of the heating coil, the roaster unit, and the drive circuit, and on the upstream side of the main body exhaust port,
An induction heating cooker, wherein a chamber exhaust port of a high-temperature air ventilation path surrounding the roaster portion is connected in parallel with the fan exhaust port on the upstream side of the main body exhaust port.   The induction heating cooker according to claim 1, wherein the chamber exhaust port is closer to the main body exhaust port than the fan exhaust port.   The induction heating cooker according to claim 2, wherein a heat-insulating top plate having a coil exhaust port is provided below the heating coil, and the coil exhaust port is connected to an air flow intake port of a blower fan or a high-temperature air ventilation path. .   The induction heating cooker according to claim 2, wherein a main body inlet of the main body casing is provided on a side plate or a bottom plate of the main body casing.   The induction heating cooker according to claim 2, wherein the blower fan is constituted by a double sirocco fan and is arranged at the rear center of the main body casing. The drive circuit section has a heat sink,
The induction heating cooker according to claim 2, further comprising a cooling fan for cooling the heat sink. A housing having a main body exhaust port;
A high temperature chamber having a roaster portion and having a chamber exhaust port;
A blower fan having a fan exhaust port, and a low-temperature chamber for supplying power to the heating coil and having a drive circuit unit disposed on the upstream side of the blower fan;
An induction heating cooker comprising: an exhaust unit that connects the chamber exhaust port and the fan exhaust port in parallel with the main body exhaust port. The exhaust unit consists of an exhaust duct and an induction duct,
The air in the high temperature chamber is attracted from the chamber exhaust port and exhausted toward the main body exhaust port by an airflow flowing from the blower fan through the fan exhaust port into the exhaust duct. Induction heating cooker. A heating chamber and a coil chamber having a coil exhaust port;
The induction heating cooker according to claim 7 or 8, wherein the coil exhaust port is in fluid communication with a high temperature chamber or a low temperature chamber, or in fluid communication with an exhaust duct via a coil duct. A high temperature chamber is located approximately in the center of the housing,
Cold chambers are symmetrically arranged on both sides of the hot chamber,
The induction heating cooker according to any one of claims 7 to 9, wherein a single blower fan is disposed in the induction duct.

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