JP5441847B2 - Electromagnetic induction heating cooker - Google Patents

Description

  The present invention relates to an electromagnetic induction heating cooker that induction-heats an object to be heated by a heating coil.

  In the conventional induction heating cooker, the direction of the fan inlet and outlet is arranged in a direction that coincides with the axial direction of the fan, there are a plurality of outlets, and a circuit board is arranged downstream thereof. Yes (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-302407 (Abstract, FIG. 7)

  In the conventional electromagnetic induction heating cooker described above, if a large amount of water is accidentally made to flow into the intake port while the cooker is being used, it can be bounced at the bottom of the cooker and sucked by the fan and scattered. It is fed into a circuit board arranged on the outlet side. Depending on the amount of water, there is a risk of circuit board failure. Moreover, since the air inlet and the fan were close, the rotation sound of the fan was heard loudly.

  The present invention has been made in order to solve the above-described problems, and reduces the rotational noise of the fan, and electromagnetic induction heating that can prevent water from entering the circuit board or the like even when water enters from the air inlet. The purpose is to obtain a cooker.

  An electromagnetic induction heating cooker according to the present invention includes a motor case having a through hole on one side and further having a drainage groove inside, a motor provided in the motor case with the axis of the through hole as a substantial center, and a motor A fan disposed outside the through hole of the case and attached to the rotating shaft of the motor, a board storage case in which the fan is rotatably housed and mounted in the motor case, and a circuit board is housed therein, and a motor case And an intake duct having an upward intake port that communicates with the inside of the motor case, and the cooling air from the intake duct is disposed on the opposite side of the fan of the through hole inside the motor case. Water intrusion prevention means is provided so as to cover the water.

  According to the present invention, the water intrusion preventing means is provided on the inner side of the motor case so as to cover the opposite side of the through hole fan so as to suck the cooling air from the intake duct. As a result, even if water accidentally flows into the motor case from the air inlet, the water intrusion prevention means can prevent water from entering the substrate storage case. Therefore, failure of the circuit board stored in the board storage case can be prevented. Further, since the water intrusion prevention means covers a part of the suction side of the through hole, the rotation sound of the fan can be shielded.

It is a perspective view of the cooker main body which shows the state which removed the top plate and heating source of the electromagnetic induction heating cooking appliance which concerns on embodiment. It is a perspective view which shows the fan apparatus for cooling, the board | substrate storage case, and the cooling duct in the electromagnetic induction heating cooking appliance of embodiment. It is a perspective view which decomposes | disassembles and shows the cooling fan apparatus and board | substrate storage case of FIG. FIG. 3 is an external perspective view showing the cooling fan device of FIG. 2 in an enlarged manner. It is a perspective view which crushes and shows a part of sirocco fan opposite side of the cooling fan apparatus of FIG.

FIG. 1 is a perspective view of a cooker body showing a state where a top plate and a heating source of an electromagnetic induction heating cooker according to an embodiment are removed, and FIG. 2 is a cooling fan device in the electromagnetic induction heating cooker of the embodiment, It is a perspective view which shows a board | substrate storage case and a cooling duct.
As shown in FIG. 1, the main body case 2 of the cooker main body 1 is formed in a rectangular shape having an opening at the top. The upper opening is configured to be covered with a top plate. The main body case 2 includes upper and lower partition plates 3R and 3L that extend in the front-rear direction on both sides, a horizontal partition plate 4 that partitions the entire space between the upper and lower partition plates 3R and 3L into two upper and lower spaces, and a horizontal partition plate. 4 is provided with a rear partition plate 5 that is bent at a right angle upward from the rear end portion 4 and has both ends abutting against the upper and lower partition plates 3R and 3L. The left and right upper and lower partition plates 3R and 3L are provided with cutouts 3a and 3b at the top. The notches 3a and 3b are provided so as not to collide with a cooling duct, which will be described later, when it is installed horizontally. The rear partition plate 5 is provided with two exhaust holes 5a.

  Each space partitioned by these partition plates forms a right cooling chamber 6R and a left cooling chamber 6L, an upper part chamber 7, and an exhaust chamber 8. These chambers are not completely isolated from each other. For example, the right cooling chamber 6R, the left cooling chamber 6L, and the upper component chamber 7 communicate with each other by the notches 3a and 3b. The exhaust chamber 8 communicates with the two exhaust holes 5a. For example, three heating coils are arranged above the horizontal partition plate 4, and a grill heating chamber 9 is provided in a space below the heating coils. The grill heating chamber 9 is a substantially independent sealed space when the grill door 9a is closed, but communicates with an external space of the main body case 2, that is, an indoor space such as a kitchen via the exhaust duct 9b. Yes.

  In the right cooling chamber 6R and the left cooling chamber 6L described above, as shown in FIG. 2, a cooling fan device 11 and a substrate storage case 21 connected to the fan device 11 are stored and fixed. Two cooling air discharge ports 22 c and 22 d provided on the upper part of the substrate storage case 21 are connected to the cooling duct 25 described above. The cooling duct 25 is installed in the horizontal partition plate 4 in a state of straddling the notches 3a and 3b of the upper and lower partition plates 3R and 3L. The cooling duct 25 is formed, for example, by superposing an upper case that is an integrally molded product of plastic and a lower case that is also an integrally molded product of plastic and fixing them with screws. On the upper surface of the upper case, there are provided a plurality of jet outlets 25a for blowing cooling air to the upper heating coil, and a rectangular vent hole 25b for sending cooling air to an electronic component such as a liquid crystal display device.

Next, the configuration of the cooling fan device 11 and the substrate storage case 21 will be described with reference to FIGS.
3 is an exploded perspective view of the cooling fan device and the substrate storage case of FIG. 2, FIG. 4 is an enlarged external perspective view of the cooling fan device of FIG. 2, and FIG. 5 is the cooling fan of FIG. It is a perspective view which crushes and shows a part of sirocco fan opposite side of an apparatus.
The cooling fan device 11 is configured by combining motor cases 12 and 14, a motor 13, a sirocco fan 15, and a water intrusion prevention means 31. The motor cases 12 and 14 and the sirocco fan 15 described above are formed of plastic, for example.

  The motor case 12 is configured to extend upward from one side (suction side) of the cylindrical air passage 12a when viewed from the opening 12b side, and a cylindrical air passage 12a having a substantially circular opening 12b on one side. The side of the opening 12b communicating with the cylindrical air passage portion 12a is constituted by an open intake portion 12c. A drainage groove 12d extending toward the opening 12b is provided on the lowest surface of the cylindrical air passage 12a. The drain groove 12d is in a state where the other motor case 14 side surface is open.

  The motor case 14 has a circular through hole 14b that is substantially centered on the axis of the opening 12b of the cylindrical air passage portion 12a, and a suction air passage portion 14a that fits into the cylindrical air passage portion 12a. The air passage portion 14a is configured to extend upward from one side (suction side) facing the air intake portion 12c of the air passage portion 14a, and the air intake portion 12c side that is in communication with the cylindrical air passage portion 12a is open, and the air intake portion 14a. A plate-like cover 14d provided on the other side extending in a substantially right-angle direction from the intake portion 14c of the other, and a through-hole 14b of the suction air passage portion 14a are arranged with the axial center of the through-hole 14b as a substantial center and pass through. The motor support plate 14f is supported by three support members 14e fixed to the peripheral edge of the hole 14b.

  The side plate facing the open side of the intake portion 14c of the suction air passage portion 14a is provided with an inclined portion 14g that is inclined downward toward the open side. The motor 13 is fixed to the motor support plate 14f through the rotation shaft 13a through a hole provided in the center. A sirocco fan 15 is attached to the rotating shaft 13a.

  After fixing the motor 13 to the motor support plate 14f provided in the suction air passage portion 14a of the motor case 14 and attaching the sirocco fan 15 to the rotating shaft 13a of the motor 13, the opposite side of the sirocco fan 15 of the motor case 14 4 are assembled together so as to be closed by the motor case 12 and coupled by a fixing tool such as a screw, the cooling fan device 11 as shown in FIG. 4 is assembled. When the cooling fan device 11 is assembled, the intake duct 11a having the upward intake port 11b is configured by the intake portion 12c on the motor case 12 side and the intake portion 14c on the motor case 14 side.

  As shown in FIG. 5, the cooling fan device 11 is supplied with cooling air from the intake duct 11a on the suction air passage portion 14a, which is the main portion of the motor case 14, on the opposite side of the through hole 14b from the sirocco fan 15. Water intrusion prevention means 31 is provided so as to cover the suction. The water intrusion prevention means 31 is attached to the suction air passage portion 14a on the opposite side of the sirocco fan 15 of the through hole 14b, and is disposed at a substantially center of the side plate 31a and a ring-shaped side plate 31a extending to the motor case 12 side. 13 is a ring-shaped motor mounting portion 31b in which the rear end portion is inserted, a plate-shaped reinforcing portion 31c extending from the ring-shaped side plate 31a to reinforce the motor mounting portion 31b, and a circular hole formed by the ring-shaped side plate 31a. It is comprised with the semicircle-shaped cover part 31d which covers substantially half. Each of these parts is integrally formed of plastic, for example. The above-described cover portion 31d is tilted so that the intake port 11b side becomes higher.

  The above-described substrate storage case 21 is formed as an integral structure by combining two plastic half-cases 22 and 23 and connecting them with a fixing tool such as a screw. Of the two cases 22, 23, one case 22 includes an annular fan cover 22a that covers the sirocco fan 15 of the cooling fan device 11, and an opening 22b that is open on the peripheral surface of the fan cover 22a on the sirocco fan 15 side. And are provided. When the case 22 is assembled to the suction air passage portion 14a of the cooling fan device 11, the sirocco fan 15 is covered by the fan cover 22a, and the plate-like cover 14d provided in the suction air passage portion 14a and the opening of the case 22 are covered. An air outlet for blowing cooling air into the substrate storage case 21 is formed by the portion 22b.

  Further, two cooling air discharge ports 22 c and 22 d are provided on the upper surface of the case 22 along the direction in which the cooling air from the sirocco fan 15 flows. The cooling air discharge port 22d is located on the most downstream side of the flow of cooling air in the substrate storage case 21, and has a larger opening area than the cooling air discharge port 22c. These discharge ports 22c and 22d are connected to the cooling duct 25 described above (see FIG. 2).

  A circuit board 24 on which an inverter circuit for supplying a predetermined high frequency power to the heating coil is mounted is stored in the circuit board storage case 21 in which the two cases 22 and 23 are combined. A power supply / drive circuit for driving the motor 13 of the cooling fan device 11 is also mounted on the circuit board 24 apart from the inverter circuit portion.

  An assembly in which the cooling fan device 11 and the substrate storage case 21 are integrally assembled is stored and fixed in the right cooling chamber 6R and the left cooling chamber 6L as a cooling unit. The intake port 11 b of the cooling fan device 11 is disposed on the back side of the main body case 2.

  In the electromagnetic induction heating cooker configured as described above, the cooling fan device 11 is driven when the cooker body 1 is used, and the indoor air is sucked from the intake port 11b as cooling air. The cooling air sucked into the intake port 11b passes through the intake duct 11a and is sucked into the cylindrical air passage portion 12a. The cooling air flows into the semicircular through hole 14 b formed by the semicircular cover portion 31 d and is sent into the substrate storage case 21 by the sirocco fan 15 as a swirling flow. That is, as indicated by the arrows shown in FIGS. 4 and 5, the cooling air sucked from the vertical direction is sent out in a horizontal direction substantially at a right angle.

For example, when water flows on the upper surface of the top plate during use of the cooker main body 1 and the water flows into the intake port 11b, the water passes through the intake duct 11a and becomes a cylindrical air passage portion. It hits the curved surface facing the intake port 11b in 12a and flows into the drainage groove 12d. In that case, the surface of the cylindrical air passage portion 12a that contacts the water is curved inward, so that it flows into the drain groove 12d without flipping. In addition, since the intake duct 11a is provided with the inclined portion 14g on the side plate on the sirocco fan 15 side, the water flowing in from that direction flows downward along the inclined portion 14g without splashing, and the cylindrical air passage portion It reaches the curved surface in 12a and flows into the drainage groove 12d.
When water that has fallen from the air inlet 11b hits the curved surface in the cylindrical air passage portion 12a, it can be prevented from flowing into the through hole 14b by the semicircular cover portion 31d. Is done.

  As described above, in the embodiment, the suction air passage portion 14a which is the main portion of the motor case 14 is covered so that the cooling air from the intake duct 11a can be sucked on the opposite side of the through hole 14b from the sirocco fan 15. In addition, water intrusion prevention means 31 is provided. Thereby, even if water accidentally flows into the motor cases 12 and 14 from the air inlet, the water intrusion prevention means 31 can prevent water intrusion into the substrate storage case 21. Therefore, failure of the circuit board 24 stored in the board storage case 12 can be prevented. Moreover, since the water penetration preventing means 31 covers substantially half of the through hole 14b on the suction side, the rotational sound of the sirocco fan 15 can be shielded.

  In addition, since the side plate on the sirocco fan 15 side of the intake duct 11a is inclined, the amount of material can be reduced. Moreover, since the failure of the circuit board due to water intrusion is prevented, the life of the cooker body 1 can be extended. Furthermore, since there is no bending pressure loss of the air sucked from the intake port 11b, the energy consumption of the cooling fan device 11 can be suppressed.

  In the embodiment, the semicircular cover portion 31d covers substantially half of the through hole 14b of the suction air passage portion 14a. However, the shape of the cover portion 31d is not limited. For example, the shape of the cover portion 31d may be a substantially fan shape, and the fan-shaped cover may be in a state as shown in FIG.

1 cooker body, 2 body case, 3R, 3L top and bottom partition plates, 3a, 3b notch,
4 Horizontal partition plate, 5 Rear partition plate, 5a Exhaust hole, 6R Right cooling chamber, 6L Left cooling chamber,
7 Upper parts chamber, 8 Exhaust chamber, 9 Grill heating chamber, 9a Grill door, 9b Exhaust duct, 11 Cooling fan device, 11a Intake duct, 11b Inlet, 12 Motor case, 12a Cylindrical air passage, 12b Opening , 12c Air intake part, 12d Drainage groove, 13 motor, 13a Rotating shaft, 14 Motor case, 14a Suction air passage part, 14b Through hole, 14c Air intake part, 14d Plate-shaped cover, 14e Support member, 14f Motor support plate, 14g Inclined part, 15 Sirocco fan, 21 Substrate storage case, 22, 23 case, 22a Fan cover, 22b Opening part, 22c, 22d Cooling air outlet, 24 Circuit board, 25 Cooling duct, 25a Outlet, 25b Ventilation port, 31 Water intrusion prevention means, 31a Ring-shaped side plate, 31b Motor mounting portion, 31c Plate-shaped reinforcing portion, 31d Half Cover part of the shape.

Claims (3)

A motor case having a through hole on one side and further having a drainage groove inside;
A motor provided around the axis of the through hole in the motor case,
A fan disposed outside the through hole of the motor case and attached to the rotating shaft of the motor;
A board housing case in which the fan is rotatably housed and mounted in the motor case, and a circuit board is housed therein;
An intake duct that extends upward on the suction side of the motor case and has an upward intake port that communicates with the inside of the motor case; and
An electromagnetic induction heating cooker characterized in that water intrusion prevention means is provided inside the motor case so as to cover the opposite side of the through hole to the fan so that cooling air from the intake duct can be sucked.   The electromagnetic induction heating cooker according to claim 1, wherein the water intrusion prevention means has a substantially semicircular surface when viewed from the inside of the motor case.   The electromagnetic induction heating cooker according to claim 1, wherein the water intrusion prevention means has a substantially fan-shaped surface when viewed from the inside of the motor case.

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