JP4877336B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker that is installed and used in combination with a cabinet such as a kitchen.

  Conventionally, this type of cooking device has a cooling-only fan and an exhaust-only fan to forcibly create an intake / exhaust path to efficiently cool the device (see, for example, Patent Document 1).

FIG. 7 shows a conventional induction heating cooker described in Patent Document 1. As shown in FIG. As shown in FIG. 7, by providing an intake-only fan 4 and an exhaust-only fan 5 in a main body 3 integrated from the top plate 1 and the outer shell case 2, an intake / exhaust path can be obtained even if the pressure loss inside the device is large. By forcibly making the air, the air taken in from the intake port 6 is surely exhausted from the exhaust port 7 to efficiently cool the device.
JP-A-11-354264

  However, in the above-described conventional configuration, the exhaust air becomes high temperature due to the exhaust heat that cools the heat generating part such as the heating chamber 8 and the heating coil (not shown) in the main body 3 and the high temperature part such as the shielding plate 9, and is exclusively used for exhaust. The fan 4 has a drive motor that drives the fan 4 disposed in the exhaust path. The drive motor placed in the fan 4 is also self-heated, and the windings and bearings are particularly hot, keeping them below the allowable temperature. It had the problem of becoming difficult.

  In view of the problems of the conventional configuration, the present invention suppresses the temperature increase of the drive motor that accompanies the provision of the exhaust fan 5 and facilitates the installation of the exhaust fan inside the main body. With the goal.

In order to solve the above-described conventional problems, an induction heating cooker according to the present invention includes a heating coil provided below a top plate that covers an upper surface of a main body and forms a main body outer shell, and an external exhaust provided in the main body outer shell. A centrifugal exhaust heat fan that arranges a blade row on the outer peripheral portion of the opening and the flange surface and sucks air from the exhaust heat fan intake portion; a drive motor whose shaft is fitted to a boss connected to the flange surface; one end and the other end connected to the said body and a first air passage having a built-in Ri and the heat exhaust fan connected to the external exhaust port, the flange surface is the second intake air and the exhaust heat fan air intake has a flange opening leading to road, the second intake air passage at one end through the flange openings to built the other end connected to the heat exhaust fan suction portion is formed a second intake air passage inlet and said drive motor by Yes, said drive Motor is introduced into the second intake air passage from the second intake air passage inlet and driving the heat exhaust fan is discharged to the flange opening from the street the exhaust heat fan inlet portion of the first air passage through the that in which air is configured to cool the drive motor.

Accordingly, the high-temperature exhaust heat in the main body is forcibly exhausted from the external exhaust port by the exhaust heat fan through the first ventilation path, so that the air in the main body is sucked from the first ventilation path intake port and it is possible to perform the external outlet or we discharge out cooling through the second intake air passage outlet, a drive motor for driving the heat exhaust fan, the second intake air passage inlet via a second intake air passage Since the air introduced into the exhaust heat fan intake section is cooled so as not to be exposed to the high temperature exhaust heat of the first ventilation path, the position of the second intake ventilation path intake port is set at a low air temperature in the main body. The drive motor can be efficiently cooled by setting the location or a location where air can be taken from outside the main body.

The induction cooking device of the present invention sucks the air in the main body with the exhaust heat fan, discharges it from the external exhaust port, cools it, and controls the drive motor that drives the exhaust heat fan to suppress the influence of the exhaust heat. It can cool well.

An induction heating cooker according to a first invention includes a heating coil provided below a top plate that covers an upper surface of a main body and forms a main body outer shell, an external exhaust port provided in the main body outer shell, and an outer periphery of a flange surface. A centrifugal exhaust heat fan that draws air from the exhaust heat fan intake section by arranging a blade row in the part, a drive motor whose shaft is fitted to a boss connected to the flange surface, and one end connected to the main body the other end is provided with a first air passage having a built-in connection and the heat exhaust fan to the outside air outlet, the flange surface having a flange opening leading to the second intake air passage and the exhaust heat fan air intake the other end one end through said flange opening leads to the waste heat fan intake section by have a second intake air passage incorporating the second intake air passage inlet port is formed and the driving motor, the driving The motor Is introduced into the second intake air passage from the second intake air passage inlet and to drive said flange opening air the driving motor to be discharged from the through street the exhaust heat fan inlet portion of the first air passage As the exhaust air is cooled, the hot exhaust heat in the main body is forcibly exhausted from the external exhaust port by the exhaust heat fan through the first ventilation path, so that the air in the main body is discharged from the first ventilation path intake port. The intake motor can be cooled by being discharged from the external exhaust port through the second intake air passage exhaust port, and the drive motor for driving the exhaust heat fan is connected to the second intake air passage through the second intake air passage. Since the air introduced into the exhaust heat fan intake section is cooled so as not to be exposed to the high temperature exhaust heat in the first ventilation path, the position of the second intake ventilation path intake port is set to the air temperature in the main body. Empty from a low place or outside the main unit By setting the place where you can introduce, it can be a drive motor efficiently cooled.

  According to a second aspect of the present invention, in the induction heating cooker of the first aspect of the invention, the first ventilation path is a first intake ventilation path from the first ventilation path intake port provided in the main body to the exhaust heat fan intake section. By having the passage, the air in the vicinity of the first air passage inlet can be intensively sucked, and the first air passage inlet is provided at a place where cooling is required or where the air stays to efficiently cool the air. It can be performed.

  In a third aspect of the invention, particularly in the induction heating cooker of the first or second aspect of the invention, the drive motor is fixed to the exhaust heat fan casing that houses the exhaust heat fan and forms part or all of the first ventilation path. By configuring the exhaust heat fan unit and fixing the exhaust heat fan unit to the main body, the first ventilation path and the drive motor can be easily incorporated into the main body and removed during repair.

  According to a fourth aspect of the invention, in the induction heating cooker of the third aspect of the invention, the exhaust heat fan casing further forms part or all of the second intake air passage, whereby the first air passage, the drive motor, and Incorporation of the second intake air passage into the main body and removal work for repair are facilitated.

A fifth invention is, in particular, in the induction heating cooker of the first aspect of the invention, the flange opening by setting only was in the vicinity of the ball scan Te flange surface odor, flange opening from the second intake air passage inlet The flow of the second intake air passage that communicates with the drive motor can be brought close to the bearing portion of the drive motor and the shaft surface of the drive motor, and the bearing temperature of the shaft and shaft base of the drive motor can be reduced.

According to a sixth aspect of the present invention, in particular, in the induction heating cooker of the first aspect of the invention, the flange surface is curved so as to be concave with respect to the drive motor side inside the portion where the blade row is formed. In addition to being able to reduce the thickness of the exhaust heat fan, the second intake air passage is connected to the exhaust of the drive motor by the curved flange surface. It becomes easier to follow the outer shape and shaft of the heat fan, and the effect of reducing the bearing temperature at the shaft and shaft base of the drive motor can be enhanced. In addition, the temperature of the exhaust heat fan can be reduced because the second intake air passage easily follows the flange surface, and in addition, the air flow resistance of the second intake air passage is reduced by curving the flange surface, and the exhaust heat is exhausted. The performance degradation of the fan unit can be suppressed.

In the seventh aspect of the invention, in particular, in the induction heating cooker of the fifth or sixth aspect of the invention, the flange surface protrudes toward the first intake air passage in the vicinity of the boss, and the boss protrudes toward the drive motor with respect to the flange surface. The length of the boss facing the second intake air passage is configured to be larger than that in the case where the flange surface does not protrude toward the first intake air passage near the boss. However, the portion exposed to the second ventilation is increased, and the effect of reducing the bearing temperature at the shaft and shaft root fitted to the boss can be enhanced.

An eighth aspect of the invention is an induction heating cooker according to any one of the first to seventh aspects of the invention, wherein the main body is dropped and installed in a cabinet having an opening on the upper surface. The intake air passage is a cabinet whose temperature is lower than the exhaust air of the main body from the second intake air passage inlet by sucking the air in the cabinet from the second intake air passage inlet provided on the outer surface of the outer shell of the main body. The inside air is sucked and flows through the second intake air passage, so that the temperature of the drive motor, shaft, exhaust heat fan, etc. can be reduced, and at the same time the hot air in the cabinet can be sucked to reduce the temperature in the cabinet.

According to a ninth aspect of the invention, in the induction heating cooker of the eighth aspect of the invention, the shaft of the drive motor is horizontal, and the second intake air passage intake is provided on the surface above the bottom of the outer shell of the main body. , Positioned above the bottom of the outer shell of the main body, which is stored in the cabinet with the main body installed in the cabinet, and prevents the second intake air passage inlet from being blocked. Since the exhaust heat fan sucks the air in the cabinet, it is easy to reduce the temperature of the storage part in the cabinet.

The tenth invention is an induction heating cooker in which the external exhaust port is provided at the rear part of the main body, particularly in the eighth or ninth invention, wherein the second intake air passage is provided on the rearmost surface of the outer shell of the main body. air with inhaling the obtained the cabinet from the second intake air passage inlet, at least a portion of said second intake air passage inlet is provided over a position avoiding the last surface of the body shell Thus, even when the rear wall in the cabinet incorporating the main body and the rear surface of the outer shell of the main body are close to each other, at least a part of the second intake air passage intake is separated from the rear wall of the cabinet. Can be prevented from being blocked.

Suction fan first aspect of the invention, especially in the first 1-7 induction heating cooker of any one of the invention, in the body, to draw a heating chamber for heating an object that was placed in the interior, said body external air And the second intake air passage intake port is provided in the main body and is arranged at a position for sucking air from the intake fan before reaching the heating chamber, and a cabinet incorporating the main body and the main body If the space between the outer periphery of the outer shell is narrow and the second intake air passage intake port is likely to be blocked, or there is a device with exhaust heat such as an oven below the main body to draw cold air from the second intake air passage intake port Even when this is difficult, the temperature of the air flowing through the second intake air passage is reduced.

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

(Embodiment 1)
1 to 4 show an induction heating cooker according to the first embodiment of the present invention. FIG. 1 is an exploded perspective view showing the configuration of the induction heating cooker in the present embodiment, FIG. 2 is a longitudinal sectional view passing through the roaster 32 portion, and FIG. a part enlarged sectional view, FIG. 4 is a front view of the waste heat fan unit 37 in a state in which removal of the suction guide 39 and the intake and exhaust partition plate 40, showing the flow of air in the exhaust heat fan casing 42.

  In FIG. 1, the cooker main body 21 is assembled by being dropped from above into an opening 23 provided on the top surface of a kitchen cabinet 22. The upper surface of the main body 21 is covered by a plate frame 25 surrounding the top plate 24 made of crystallized ceramic. On the top plate 24, heating portions 26a, 26b, and 26c are displayed by printing. An external intake port 27 and an external exhaust port 28 are provided in the rear portion of the main body 21 behind the top plate 24. Heating coils 29a and 29b constituting induction heating means are disposed inside the main body 21 corresponding to the heating parts 26a, 26b and 26c, and a radial heater 30 which is an electric resistance heating type heating means is disposed behind the heating coils 29a and 29b. ing.

  Below the left heating coil 29a, a roaster 32, which is a heating chamber for heating fish or the like, is arranged as indicated by a broken line, and the partition plate 31 serves as a heat shield for preventing the heat of the roaster 32 from reaching upward. It is provided so as to partition the top and bottom between the two. A gap is provided on the upper surfaces of the partition plate 31 and the roaster 32 for heat insulation. A heating coil 29a is placed on the partition plate 31 with a spring interposed. The heating coil 29a is pressed against the back surface of the top plate 24 by a spring. The partition plate 66 is substantially the same height as the partition plate 31 and is a space surrounded by the intake fan case 34 a that forms the outer shell of the intake fan 34, the roaster 32, the main body outer shell right side surface 67, and the main body outer shell front surface 68. It is installed so as to partition the upper part. A heating coil 29b is placed on the partition plate 31 with a spring interposed therebetween. The heating coil 29b is pressed against the back surface of the top plate 24 by a spring. On the right side of the roaster 32, an internal partition 61 is provided with a gap between the right side surface of the roaster 32. Control circuits 33a and 33b are stacked and housed in a space partitioned by an internal partition plate 61 positioned on the left side and a partition plate 66 positioned on the upper side.

  As described above, on the right side of the roaster 32 and below the right heating coil 29b, the control circuits 33a and 33b, which are power supply circuits for the heating coils 29a and 29b, are arranged. Two centrifugal intake fans 34 for sucking air outside the main body 21 are arranged on the upper and lower sides behind the control circuits 33a and 33b.

As shown in FIG. 3, a heat collecting duct 35 is arranged on the partition plate 31 along the vicinity of the left outer surface 69 of the main body outer shell that is far from the intake fan 34, and is dispersed in the heat collecting duct 35. The heat collection openings 36 are arranged to suck in hot air after passing through the space below the heating coil 29a on the external exhaust port 28 side. A partition plate intake port 31 a is formed in the vicinity of the external exhaust port 28 at the rear portion of the partition plate 31, and is provided in the heat collection duct 35. The space inside the heat collecting duct 35 is connected to the first exhaust heat fan intake port 38 that is the intake port of the first ventilation path 49 formed in the exhaust heat fan unit 37 disposed in the space behind the roaster 32. .

The exhaust heat fan unit 37 includes a suction guide 39, an intake / exhaust partition plate 40, an exhaust heat fan 41, an exhaust heat fan casing 42, a drive motor 43, and a motor storage duct 44. The exhaust heat fan 41 is a sirocco fan that is a type of centrifugal fan in which a plurality of blade rows 46 are arranged perpendicularly to the flange surface 45 on the outer periphery of the flange surface 45. The flange surface 45 has a concave portion 45 a whose cross-sectional shape is curved so as to be concave with respect to the drive motor 43 side inside the portion where the blade row 46 is formed. The drive motor 43 is fitted so as to be embedded in the concave portion 45a. A boss 47 is formed on the flange surface 45 so as to be fitted to the shaft 57 of the drive motor 43 of the heat exhaust fan 41. A flange opening 48 is provided in a portion of the flange surface 45 adjacent to the boss 47.

The hot air after passing through the heating coils 29a and 29b or the radiant heater 30 guided to the first exhaust heat fan intake port 38 by the heat collecting duct 35 passes through the suction guide 39 and the intake / exhaust partition plate 40. It is sucked by the exhaust heat fan 41. This ventilation path is referred to as a first ventilation path 49. On the other hand, a second exhaust heat fan intake 50 is provided on the rear surface 52 of the outer shell of the main body which is the rear portion of the drive motor 43. Air body 21 outside the second heat discharging fan inlet 50 is a second intake air passage inlet, the gap between the drive motor 43 outer surface and the flange surface 45, and through the flange aperture 48, the exhaust heat fan air intake It is sucked by the exhaust heat fan 41 from the portion 41a. This ventilation path is referred to as a second intake ventilation path 51.

The air passing through the second intake ventilation path 51 is air introduced from the outside of the main body 21 and sucks from the inside of the cabinet 22 in which the main body 21 is installed. On the other hand, the air passing through the first ventilation path 49 is hot air after passing through the heating coils 29 a and 29 b or the radial heater 30. Accordingly, the air sucked in the second intake air passage 51 is at a lower temperature than the air sucked in the first air passage 49.

The cross-sectional area of the second air intake passage 51 is made narrower than the cross-sectional area of the first air passage 49 by narrowing the gap between the outer surface of the second exhaust heat fan inlet 50 and the drive motor 43 and the flange surface. . Therefore, the first ventilation path 49 obtains a larger ventilation amount than the second intake ventilation path 51 and becomes the main ventilation path, and the second ventilation path 51 becomes the secondary ventilation path.

  The exhaust heat fan 41 is a sirocco-type fan in which a blade row 46 is arranged vertically on the outer peripheral portion of the flange surface 45, but the thickness of the exhaust heat fan 41 formed by the blade row 46 is a drive motor 43 of the exhaust heat fan 41. The drive motor 43 is housed inside the blade row 46 so as to be embedded in the blade, and the flange surface 45 is curved so as to cover the outer surface of the drive motor 43.

The boss 47 is connected to the flange surface 45 so as to protrude toward the drive motor 43 with respect to the flange surface 45, and a part of the boss 47 faces the second intake air passage 51 side. The portion exposed to the second intake air passage 51 is increased. In the curved concave portion 45 a of the flange surface 45, a flange opening 48 is provided in a portion close to the boss 47 fitted to the shaft 57 of the drive motor 43.

The cabinet 22 in which the main body 21 is installed has an opening 23 on the upper surface, and the main body 21 is dropped and installed. Since the second exhaust heat fan intake port 50 is provided on the rear surface 52 of the outer shell of the main body 21, the intake air of the second intake air passage 51 is drawn from the inside of the cabinet 22 outside the main body.

  The drive motor 43 of the heat exhaust fan 41 is disposed substantially horizontally, and the shaft 57 faces in the front-rear direction. Since the drive motor 43 is configured to be embedded in the thickness of the exhaust heat fan 41, the position of the second exhaust heat fan inlet 50 disposed in the rear portion of the drive motor 43 is the bottom surface of the outer shell of the main body 21. It is provided on the outer shell rear surface 52 above 21a.

The lower part of the rear surface 52 of the outer shell of the main body 21 hits the cabinet 22 when the main body 21 is installed in the opening 23 of the cabinet 22 and the front side of the main body 21 is put in first and the rear side is rotated. In order to avoid this, the inclined surface 53 is formed so as to cut the main body outer corner portion. And the lower part which is at least one part of the 2nd exhaust heat fan inlet 50 has applied to the inclined surface 53 which is the position which avoided the main body 21 outer shell rear surface 22. As shown in FIG.

  FIG. 2 shows a cross-sectional view when the main body 21 is installed by being dropped into the opening 23 of the cabinet 22. In the figure, a space 54a is provided in front of the first back wall 54 disposed near the wall surface of the house, and a second space 54a is provided in front of the space 54a in order to store pipes 55 such as water and electricity. The case where the back wall 56 is provided and the opening 23 rear part 23a of the cabinet 22 and the 2nd back wall 56 adjoin is shown.

  In the drive motor 43, the shaft 57 is fitted with the boss 47 of the heat exhaust fan 41, and the shaft 57 is held by a bearing 58 inside the drive motor 43.

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

The exhaust heat fan unit 37 mainly includes a first air passage 49 that passes hot air after passing through the heating coils 29 a and 29 b through the heat collection duct 35 and the first exhaust heat fan intake port 38. The air is sucked by the exhaust heat fan 41 that is rotated by the drive motor 43, with the second intake air passage 51 passing through the second exhaust heat fan intake port 50 sucking air having a temperature lower than that of the air passing through the first air passage 49. To do.

Accordingly, the air in the second intake ventilation path 51 sucked from the second exhaust heat fan intake 50 is driven by the exhaust heat fan 41 separately from the first ventilation path 49 that sucks hot air from the first exhaust heat fan intake 38. It passes through the motor 43 and is sucked by the exhaust heat fan 41. Thereby, since it is close to the hot exhaust heat sucked from the first ventilation passage 49 and further self-heating is added, the temperature increase of the drive motor 43 of the exhaust heat fan 41 that needs to suppress the temperature increase in particular is suppressed. Thus, it is possible to improve reliability reduction such as breakage of the drive motor 43 and life reduction.

The second exhaust heat fan inlet 50 and the exhaust heat fan casing 42 that stores the exhaust heat fan 41 are connected as a motor storage duct 44 in which the drive motor 43 of the exhaust heat fan 41 is stored. Therefore, the air flow sucked into the motor housing duct 44 from the second exhaust heat fan intake port 50 becomes the second intake air passage 51, and the air sucked from the second exhaust heat fan intake port 50 is reliably driven. Since it passes through the surface of the motor 43 and is sucked by the exhaust heat fan 41, the cooling performance of the drive motor 43 is enhanced, and the effect of suppressing the temperature rise of the drive motor 43 can be enhanced. It is possible to further improve reliability reduction such as reduction.

Further, the flange surface 45 constituting the exhaust heat fan 41 is provided with a flange opening 48 close to the boss 47 fitted to the drive motor 43 of the exhaust heat fan 41, so that the second exhaust heat fan intake port 50 is provided. The air flowing through the second intake ventilation path 51 inside the connected motor storage duct 44 is communicated with the flange opening 48 and sucked into the exhaust heat fan 41.

Accordingly, the flow of the second intake air passage 51 communicating from the second exhaust heat fan intake port 50 to the flange opening 48 can be brought close to the surface of the bearing 58 and the shaft 57 of the drive motor 43, and the shaft of the drive motor 43 The temperature of 57 and the bearing 58 can be reduced.

  Further, the exhaust heat fan 41 is a sirocco type fan in which a blade row 46 is arranged on the outer peripheral portion of the flange surface 45, and the drive motor 43 of the exhaust heat fan 41 is buried in the thickness of the exhaust heat fan 41 formed by the blade row 46. As described above, the drive motor 43 is housed inside the blade row 46, and the flange surface 45 is curved so as to cover the outer surface of the drive motor 43.

Thereby, since the drive motor 43 and the exhaust heat fan 41 overlap in the thickness direction, the exhaust heat fan unit 37 can be thinned, and the second intake air passage 51 is driven by the curved flange surface 45. It becomes easy to follow the outer shape of the motor 43 and the shaft 57, and the temperature reduction effect of the shaft 57 of the drive motor 43 and the bearing 58 at the root of the shaft 57 can be enhanced. In addition, the second intake air passage 51 can easily follow the flange surface 45, the temperature of the exhaust heat fan 41 can be reduced, and the air flow resistance of the second intake air passage 51 can be reduced by bending the flange surface 45. It is reduced, and the ventilation performance fall of the exhaust heat fan unit 37 can be suppressed. Further, noise due to wind noise can be reduced.

Further, the flange surface 45 and the boss 47 are connected so that the boss 47 fitted to the shaft 57 protrudes toward the drive motor 43 with respect to the flange surface 45 of the heat exhaust fan 41, and a part of the boss 47 is the second. Since the structure faces the intake air passage 51, the boss 47 is exposed to the air flowing through the second intake air passage 51 immediately before reaching the flange opening 48, and the shaft 57 and the shaft 57 that are fitted to the boss 47 are fitted. The effect of further reducing the temperature of the base bearing 58 can be enhanced.

Further, the main body 21 is installed in the cabinet 22 having the opening 23 on the upper surface, the second heat exhaust fan intake port 50 is provided in the rear portion 52 on the outer surface of the main body close to the drive motor 43, and the second intake air passage from the outside of the main body 21 51 is inhaling.

The ventilation of the second intake air passage 51 draws in air from the inside of the cabinet 22 through the second exhaust heat fan intake port 50, so it sucks in from the first exhaust heat fan intake port 38, which is at a high temperature close to the exhaust air of the main body 21. The temperature is made lower than the ventilation of the first ventilation passage 49, and the temperature of the exhaust heat fan unit 37 and the drive motor 43 which is a component of the exhaust heat fan unit 37 is reduced as the temperature is lower than the exhaust air of the main body 21. In addition, by sucking the air in the cabinet 22 from the second exhaust heat fan intake 50, the hot air in the cabinet 22 is sucked, and the temperature in the cabinet 22 can be reduced.

  In addition, since the shaft 57 of the drive motor 43 of the exhaust heat fan 41 is set sideways, the center of the shaft 57 does not face the outer shell bottom surface 21 a of the main body 21, so the second exhaust heat fan intake 50 is located outside the main body 21. It is provided on the outer shell rear surface 52 which is a surface above the shell bottom surface 21a. In the state where the main body 21 is installed in the cabinet 22, various things are stored under the main body 21 which is a storage section in the cabinet 22, and the storage space is full or a soft film-like material such as a thin paper film is used. Even when stored, the second exhaust heat fan inlet 50 is not easily blocked. Further, since the exhaust heat fan unit 37 sucks air in the cabinet 22 at a position above the bottom surface 21a of the main body 21, which is a storage section in the cabinet 22, the higher the temperature, the higher the air that rises upward. Therefore, it is easy to reduce the temperature of the storage portion in the cabinet 22.

  Further, at least a part (about half in the embodiment) of the second exhaust heat fan inlet 50 is inclined on the inclined surface 53 that cuts the outer corner of the main body 21 below the outer shell rear surface 52 of the main body 21. A surface 53 is also provided. The configuration of the cabinet 22 of the present embodiment is such that a space is provided in front of the first back wall 54 arranged at a position close to the wall surface of the house so that the back wall 23 of the rear portion 23a of the opening 23 is close to the wall surface of the house. This is a case where the second back wall 56 is provided in front of the pipe 55 such as the housing, and the rear portion 23a of the opening 23 of the cabinet 22 and the second back wall 56 are close to each other.

In the case of such a cabinet configuration, the rear surface 52 of the outer shell is close to the second back wall 56, and the exhaust heat fan inlet 50 of the festival 2 is likely to be blocked, but at least one of the second exhaust heat fan inlets 50 is closed. Since the portion is provided on the inclined surface 53 and is provided so as to cover the position away from the outer shell rear surface 52, at least a part of the second heat exhaust fan intake port 50 is separated from the rear wall of the cabinet. Thus, the entire second exhaust heat fan intake port 50 can be prevented from being blocked, and the self-cooling effect of the drive motor 43, which is a component constituting the exhaust heat fan unit 37, can be ensured.

(Embodiment 2)
5 and 6 show an exploded perspective view of the induction heating cooker according to the second embodiment of the present invention and a plan sectional view when the top plate 24 is removed.

The configuration described in the first embodiment is different from the configuration of the second exhaust heat fan inlet 62 and the second intake ventilation path 64, and the other configurations are the same.

An internal partition plate 61 provided to secure a space for housing the control circuit 33b in the main body 21 is located on the left side of the intake fan 34 at a position along the outer shell rear surface 52 in the rear portion of the radial heater 30. Two exhaust heat fan inlets 62 are provided. The second exhaust heat fan intake port 62 and the motor housing duct 44 are connected by a self-cooling intake duct 63. Inside the self-cooling intake duct 63, air sucked into the exhaust heat fan 41 flows, and the second intake ventilation The road 64 becomes. The self-cooling intake duct 63 is provided on the rear surface 52 of the outer shell while maintaining a space behind the roaster 32 that is a heating chamber provided in the main body 21.

The flow of the cooling air in the second intake air passage 64 passing through the second exhaust heat fan intake port 62 is partly a radiant heater while the air sucked from the outside of the main body 21 by the intake fan 34 passes through the control circuit 33b. Branches below 30 and reaches the second exhaust heat fan inlet 62. At the second exhaust heat fan intake port 62, a suction force is generated by the exhaust heat fan 41 connected by the self-cooling intake duct 63 and the motor housing duct 44, and this becomes the second intake ventilation path 64.

The second intake ventilation path 64 is before reaching the heating coils 29a and 29b (not shown) and the roaster 32, and the intake fan 34 on the external intake port side with respect to the roaster 32 while passing through the control circuit 33b. The blown air passes to cool the drive motor 43 of the exhaust heat fan 41 by itself.

Thus, the drive motor 43 that operates the exhaust heat fan 41 that sucks the air heated by the heat generated in the main body 21 and sends it out of the main body 21 depends on whether or not the roaster 32 that is a heat generating portion operates. Cooling air with little thermal influence can be sucked in as the second intake ventilation path, and the temperature rise of the drive motor can be suppressed regardless of the use state of the main body 21.

  As described above, the heating cooker according to the present invention sucks the air in the main body with the exhaust heat fan, discharges it from the external exhaust port, cools the drive motor that drives the exhaust heat fan, and affects the exhaust heat In addition to the built-in type in a cabinet such as a sink, it is possible to improve the cooling performance inside the main unit or around the main unit in induction heating cookers such as stationary type and table type. It can be applied to the purpose of reducing hot air.

The exploded perspective view of the induction heating cooking appliance in Embodiment 1 of this invention The longitudinal cross-sectional view of the induction heating cooking appliance in Embodiment 1 of this invention Sectional drawing of the principal part of the induction heating cooking appliance in Embodiment 1 of this invention The elements on larger scale of the induction heating cooking appliance in Embodiment 1 of this invention The disassembled perspective view of the induction heating cooking appliance in Embodiment 2 of this invention Plan sectional drawing of the induction heating cooking appliance in Embodiment 2 of this invention Longitudinal sectional view of induction heating cooker in the conventional example

21 Main body 21a Outer shell bottom 22 Cabinet 24 Top plate 26a, 26b, 26c Heating unit 27 External intake port 28 External exhaust port 29a, 29b Heating coil 32 Roaster (heating chamber)
33a, 33b Control circuit 34 Intake fan 36 Heat collection opening (first air passage inlet)
37 exhaust heat fan unit 38 first heat discharging fan inlet (first air passage inlet)
40 intake and exhaust partition plate 41 heat exhaust fan 41a heat exhaust fan intake section 42 exhaust heat fan casing 43 drive motor 44 motor housing duct 45 flange surface 45a recessed portion 46 blading 47 boss 48 flange opening 49 the first intake air passage (first Ventilation path)
49a exhaust air passage (first air passage)
50 Second exhaust heat fan inlet (second inlet air inlet)
51 Second intake air passage 52 Outer shell rear surface 57 Axis 62 Second exhaust heat fan intake (second intake air intake)
63 Self-cooling intake duct (second intake ventilation path)

Claims (11)

A heating coil provided under the top plate that covers the upper surface of the main body and forms the outer shell of the main body, an external exhaust port provided in the outer shell of the main body, and a blade row arranged on the outer peripheral portion of the flange surface to suck out the exhaust heat fan a centrifugal exhaust heat fan for sucking air from the parts, the drive motor shaft to the boss is fitted to couple to the flange surface, one end and the other end connected to the said body connected to the external exhaust port and the exhaust comprising a first air passage having a built-in heat fan, wherein the flange surface has a flange opening leading to the second intake air passage and the exhaust heat fan inlet portion, one end through said flange opening the exhaust heat the other end connected to the fan intake portion by have a second intake air passage incorporating the second intake air passage inlet port is formed and the driving motor, and the driving motor driving the exhaust heat fan second Intake air intake Is introduced into the second intake air passage from the mouth, the induction heating cooker air discharged to cool the drive motor to the flange opening from the street the exhaust heat fan inlet portion of the first air passage through. The induction heating cooker according to claim 1, wherein the first ventilation path has a first intake ventilation path extending from a first ventilation path intake port provided in the main body to the exhaust heat fan intake section. An exhaust heat fan unit is configured in which a drive motor is fixed to an exhaust heat fan casing that houses the exhaust heat fan and forms part or all of the first ventilation path, and the exhaust heat fan unit is fixed to the main body. Item 3. The induction heating cooker according to item 1 or 2. The induction heating cooker according to claim 3, wherein the exhaust heat fan casing further forms part or all of the second intake air passage. Flange opening is set only was in the vicinity of the ball scan Te flange surface smell, induction heating cooker according to claim 1. Flange surface has a concave portion which is curved in a concave shape with respect to the drive motor side inside the forming portion of the blade row, the claims of the driving motor is configured so as to go buried in the concave portion induction heating cooker according to 1. The flange surface is protruded toward the first intake air passage near the boss, and the boss is formed to protrude toward the drive motor with respect to the flange surface. The length of the boss facing the second intake air passage is The induction heating cooker of Claim 5 or 6 comprised so that the said flange surface might increase rather than the case where it does not protrude in the said 1st intake ventilation path side in the vicinity of the said boss | hub. An induction heating cooker installed by dropping the main body into a cabinet having an opening on the upper surface, wherein the second intake air passage is from the second intake air passage inlet provided on the outer surface of the outer shell of the main body. for sucking the air in the cabinet, the induction heating cooker according to any one of claims 1-7. The induction heating cooker according to claim 8 , wherein the axis of the drive motor is horizontal, and the second intake air passage intake port is provided above the bottom surface of the outer shell of the main body. In the induction heating cooker provided with an external exhaust port at the rear of the main body, the second intake air passage sucks air in the cabinet from the second intake air passage intake port provided on the rearmost surface of the outer shell of the main body. In addition, the induction heating cooker according to claim 8 or 9 , wherein at least a part of the second ventilation path intake port is provided over a position avoiding the rearmost surface of the outer shell of the main body. The main body includes a heating chamber for heating an object to be heated and an intake fan that sucks air outside the main body, and a second intake air passage intake is provided in the main body and is provided in the heating chamber. The induction heating cooker according to any one of claims 1 to 7 , wherein the induction heating cooker is arranged at a position for sucking the air blown from the intake fan before reaching.