JP5045563B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device for a kitchen table provided with an electric heater or an electromagnetic heating device used in a general home.

Conventionally, as shown in FIG. 7, this type of heating cooker is a built-in electromagnetic induction heating cooker body 1 that is dropped into the upper surface opening of the sink 2, and the inside of the body 1 includes a heating coil 3 and an oscillation. The circuit board 4 provided with the transistor for operation and many electronic components, the fan motor 5 which cools them, and the upper surface of the main body 1 are covered with the plate 6. FIG. Reference numeral 7 denotes an operation unit, and 8 denotes an intake port for cooling. The fan motor 5 sucks outside air from an intake port 8 provided on the same surface as the operation unit 7, cools the circuit board 4 and the like, and then discharges air from an exhaust port 9 provided behind the plate 6. is there. Here, 10 is a cooling case having a duct shape (see, for example, Patent Document 1).
JP 2001-76857 A

  However, in the conventional configuration, the air blown from the blower 5 flows from the front to the rear of the main body 1. However, in the built-in electromagnetic induction heating cooker, it is necessary to cool the roaster that cooks the fish to the side, the heating coil 3 and the operation unit at the top.

  Here, in the axial blower that blows air from the front to the rear, the air is blown in the direction of the rotating shaft, so it becomes difficult to cool the sides and the upper part, and the air volume is increased and the noise is increased because the cooling is performed. Had problems.

  The present invention solves the above-described conventional problems, and blows in the wide-angle direction obliquely from the front-end corner of the main body toward the inside of the main body, so that the circuit board as well as the roaster section and the heating coil direction can be used. The object is to be able to blow wind, and to cool down the inside of the main body efficiently to make a low noise driving sound.

In order to solve the conventional problem, a main body having a top plate on which an object to be heated is placed, a heating unit disposed in the lower part of the top plate in the main body, a control circuit for controlling the heating unit, An intake port provided on the front surface of the main body for sucking outside air into the main body, an air blowing means for cooling the inside of the main body by the air sucked from the air intake opening, and an exhaust port for discharging the air blown by the air blowing means from the main body. The blowing means has an impeller having a blade portion of a centrifugal blower on the inlet side and a blade portion of a mixed flow fan on the outlet side, and an extension line of the outer peripheral end of the impeller and the impeller when viewed from the side. The outer peripheral end is inclined with respect to the rotation axis so that the rotation axis of the blower intersects with the blowing side, and a plurality of air flow paths are provided on the blowing side of the blowing means to guide the cooling air to each part of the main body It is.

  The heating cooker according to the present invention wastes air not only on the circuit board but also on the side roaster, upper heating coil, and operation unit by using a plurality of air flow paths that guide the cooling air in the direction of each cooling part. Therefore, the inside of the main body can be cooled with a small amount of air, and the operation noise can be reduced. In addition, air can be blown with high pressure performance even in a narrow passage of the air passage inside the main body, and air for cooling the heating coil, the control circuit, etc. can be blown by blowing out at a wide angle by mixed flow blowing. .

According to a first aspect of the present invention, there is provided a main body having a top plate on which an object to be heated is placed, heating means disposed in the lower part of the top plate in the main body, a control circuit for controlling the heating means, and a front surface of the main body An air inlet for sucking outside air into the main body, an air blowing means for cooling the inside of the main body by the air sucked from the air inlet, and an air outlet for discharging the air blown by the air blowing means from the main body. Has an impeller having a blade portion of a centrifugal fan on the inlet side and a blade portion of a mixed flow fan on the outlet side, and an extension line of the outer peripheral end of the impeller and a rotating shaft of the impeller when viewed from the side. Each of the outer peripheral ends is inclined with respect to the rotation axis so as to intersect at the blowing side, and a plurality of air flow paths are provided on the blowing side of the blowing means to guide the cooling air to each part of the main body. Double direction leading to the cooling part The air flow path allows air to be blown to the circuit board as well as to the side roaster section, upper heating coil, and operation section without wasting air, and cooling each component inside the main body with a small air volume This makes it possible to generate a quiet driving sound with low blowing noise. In addition, air can be blown with high pressure performance even in a narrow passage of the air passage inside the main body, and air for cooling the heating coil, the control circuit, etc. can be blown by blowing out at a wide angle by mixed flow blowing. .

  According to a second invention, in particular, in the first invention, the impeller of the blowing means includes a shroud plate, and the shroud plate has a configuration in which an outermost peripheral portion is bent so as to be concave on the blade side. The flow in the radial direction from the blades can be deflected in the direction of the impeller shaft, air can be smoothly blown to the circuit board disposed on the downstream side, and cooling can be promoted.

According to a third invention, in the first or second invention, the casing of the blower means has a cylindrical bell mouth portion provided with a circular hole on the suction side, and a plurality of outlet holes in a substantially rectangular passage on the outlet side. Consisting of the duct part provided, it is possible to smoothly suck into the rotating impeller from the bell mouth part, and on the discharge side, wind is distributed in a small space so that air is smoothly blown to square parts such as the control circuit. Since it can be changed, it can be built in a built-in heating cooker.

According to a fourth aspect of the present invention, in particular, in the third aspect of the present invention, at least one of the plurality of air flow paths is provided on the side of the duct portion of the casing, so that the operation unit and the heating unit disposed on the upper portion of the main body are heated. The air flow path to the coil can be easily routed, and air can be blown with reduced pressure loss.

  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)
FIG. 1 is a side sectional view of a cooking device according to a first embodiment of the present invention. FIG. 2 shows a side cross-sectional view of the heating cooker according to the first embodiment of the present invention. As shown in FIG. 1, the heating cooker according to the present embodiment includes a main body 13 having a top plate 12 on which an object to be heated 11 such as a pan and a frying pan is placed, and a lower portion of the top plate 12 in the main body 13. A heating coil 14 as an electromagnetic induction heating means, a control circuit 15 for controlling the heating coil 14, and an operation installed on a movable panel 16 that is disposed in front of the top plate 12 of the main body 13 and that opens and closes and rotates. Part 17. And it was set as the structure provided with the mixed flow type air blower 20 as a ventilation means which suck | inhales external air in the main body 13 from the inlet ports 18 and 19 provided in the periphery of the said movable operation panel 16. FIG. Then, the air sucked from the intake ports 18 and 19 cools the heating coil 14, the control circuit 15, the top panel operating unit 21, the body periphery 22, and the like disposed in the main body 13, and the exhaust port provided at the left rear portion of the main body 13. 23 was discharged. Here, 24 is a motor for driving a mixed flow fan, 25 is an impeller of the mixed flow fan, 26 is a cylindrical bell mouth portion of the mixed flow fan, and 27 is connected to an outlet of the mixed flow fan. A plurality of air flow paths. Moreover, the thin broken line arrow in a figure shows the flow of a wind. Here, 28 is a hub plate which is a main plate of the impeller, 29 is a blade of the impeller, 30 is a shroud plate of the impeller, and 31 is a rectangular duct portion. Reference numeral 32 shown in FIG. 2 denotes a roaster section for grilling fish and the like.

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

  The object to be heated 11 with the food to be cooked is placed on the top 12, the control circuit 15 is driven by the operation of the operation unit 17, and the heating coil 14 is energized. Thereby, the heating coil 14 heats the article 11 to be heated by electromagnetic induction. And when desired heating is complete | finished, the heating of the to-be-heated object 11 by the heating coil 14 is automatically stopped by operating the operation part 17 or a control circuit.

  Since the heating coil 14 and the control circuit 15 generate heat while the heating coil 14 is being driven, the mixed flow fan 20 is driven to blow air for cooling. The mixed flow type blower 20 sucks air from the inlets 18 and 19 around the movable operation panel 16, and controls the downstream control circuit 15, the heating coil 14 and the top panel operation unit 21 located above, The wall surfaces around the roaster portion 32 and the body periphery 22 are cooled. In addition, the air that has cooled the heat generating portion is collected in the exhaust port 23 located on the upper left surface of the rear portion of the main body 13 through the air flow path and exhausted upward in the room.

  Here, the shape of the impeller of the mixed flow fan 20 will be described. As shown in FIG. 3, the impeller 25 of the mixed flow blower 20 rotates by attaching blades 29 to a space sandwiched between a hub plate 28 and a shroud plate 30 which are main plates having a conical slope. . And the shroud board 30 of the impeller 25 was set as the structure which bent the outermost peripheral part 33 so that it might become concave on the blade | wing 29 side. In addition, the outer peripheral end 34 of the blade 29 is configured to face in an oblique direction at an angle θ1 with respect to the rotation shaft 35.

  With such a configuration, the effective outer diameter of the impeller 25 can be increased, and the air blowing performance of the impeller having a large outer diameter can be achieved even in a limited space for incorporation in the built-in heating cooker. Can be obtained. In addition, since the flow in the impeller can be changed in an oblique direction without deflecting the flow in the flow path, air can be smoothly blown to the substrate of the control circuit 15 disposed on the downstream side, and Since the air can also be blown in the direction, the air can be smoothly blown into the air flow path connected to the air outlet 36 opened to the side of the duct portion 31 of the casing.

Moreover, as shown in FIG. 4, the casing of the mixed flow type blower 20 includes a plurality of cylindrical bell mouth portions 26 each provided with a circular hole on the suction side and a plurality of rectangular air flow paths 27 connected to the blow-out side. It comprised with the duct part 31 provided with the blowing hole. The air distribution in the casing can be changed from a round shape to a square shape so that air can be smoothly sucked into the rotating impeller 25 from the bell mouth portion 26 and smoothly blown to the square parts such as the control circuit on the discharge side. Because it can be deflected in a small space, it can also be built into narrow space equipment with built-in heating cookers.

  In addition, since the discharge direction from the impeller is inclined, air can be smoothly distributed to a plurality of air flow paths having different perpendicular directions. For example, if the air is blown in parallel to the air flow path, it is difficult to flow through the air flow path in the 90 ° direction, but in the mixed flow type blower, the air flow is discharged obliquely to the air flow path. The vertical flow path can also distribute air. Therefore, air can be flowed to the air flow path 27 including the control circuit board in the horizontal direction as in the built-in heating cooker and also to the air flow path 27 to the heating coil 14 that needs to flow in the vertical direction. Furthermore, the cooling air of the top-panel operation part 21 can also be blown from the blower outlet 36 opened to the duct part side of the casing. In particular, when the angle θ1 is in the range of 45 ° ± 20 °, the vertical direction and the horizontal direction can flow easily, and it is suitable as a cooling fan built in the built-in heating cooker.

  Furthermore, as shown in FIG. 5, the outer diameter r1 of the hub plate 28 of the impeller 25 is configured to be smaller than the inner diameter r2 of the shroud plate 30 so that the manufacturing resin mold is pulled out in the impeller axis direction. Production efficiency can be increased and costs can be reduced.

The air blow of the mixed flow type blower is characterized in that it is blown in an oblique direction by flowing through a space sandwiched between the shroud plate and the hub plate of the impeller. Since air can be blown over a wide range using this obliquely blown flow, not only the downstream control circuit 15 (board and components) but also the heating coil 14 and the top panel operating unit 21 above are blown. The wind can be blown using the road, and the inside of the main body can be effectively cooled. As a result, since cooling can be performed with a limited amount of air, the rotational speed of the impeller can be kept low, and a low noise driving sound can be obtained. Moreover, since the fluid noise generated at the time of blowing is insulated by the blowing passage, it can be further reduced.

  Further, by arranging the nonwoven fabric filter 37 as a rectifying means having a rectifying function and a purification filter function on the upstream side of the suction port of the mixed flow type blower 20, the flow on the suction side can be made uniform. The flow of the mold blower 20 can be made efficient. And since the nonwoven fabric filter 37 has a function of purifying air, it is possible to remove the steam and oily smoke generated during cooking by the nonwoven fabric, and the steam and oily smoke can be used for electronic parts such as a control circuit, blower means, etc. It is possible to prevent adverse effects. In addition to the nonwoven fabric filter, a material having a purification filter function can exhibit the same effect.

  In this way, by blowing obliquely with a mixed flow type blower, it is possible to cool parts by sending air to the plurality of air flow passages in both the horizontal air flow passage and the vertical air flow passage. it can. And since it can blow without leaking air in a ventilation flow path, useless air can be suppressed and it can be set as the driving | running sound of a low rotation and a low noise.

  In addition, although described as a mixed flow fan, as shown in FIG. 6, the pressure performance of the centrifugal blower and the oblique flow are obtained by combining the blade portion 38 of the centrifugal blower and the blade portion 39 of the mixed flow blower. The characteristic which considered the air volume performance of the flow type fan can be obtained. That is, the shroud plate 30 of the impeller 25 has a configuration in which the outermost peripheral portion 33 is bent so as to be concave toward the blade 29, thereby forming a centrifugal blade on the inlet side of the blade and a mixed flow blade on the outlet side. The configuration is as follows. By adopting such a configuration, the heating coil 14 can blow air with high pressure performance even in a narrow flow path of the air passage inside the main body like a heating cooker, and blow out at a wide angle by the diagonal flow blowout. Thus, air for cooling the control circuit 15 and the like can be blown.

  In addition, although the explanation was made with the configuration in which the mixed flow fan is installed on the right side of the main body, the cooling effect by the mixed flow fan that can blow air over a wide range, not only on the left side, but also in the center installation and both left and right sides, It can be obtained similarly.

  As described above, the heating cooker according to the present invention guides air with a mixed flow fan and a plurality of air flow paths that realize a flow suitable for blowing air to each cooling component inside the rectangular main body. Thus, the inside of the main body can be efficiently cooled and can be used safely with low noise even in a narrow space. Therefore, it is effective for a configuration incorporated in a system kitchen unit or the like that can store the apparatus main body.

Side surface sectional drawing of the heating cooker in Embodiment 1 of this invention. Front sectional drawing of the heating cooker in Embodiment 1 of this invention Side surface sectional drawing of the mixed flow type fan used for the heating cooker in Embodiment 1 of this invention Front sectional drawing of the mixed flow type fan used for the heating cooker in Embodiment 1 of this invention Side surface sectional drawing of the mixed flow type fan used for the heating cooker in Embodiment 1 of this invention Side surface sectional drawing of the mixed flow type fan used for the heating cooker in Embodiment 1 of this invention Side sectional view of a conventional cooking device

DESCRIPTION OF SYMBOLS 11 To-be-heated object 12 Top plate 13 Main body 14 Heating coil 15 Control circuit 18, 19 Intake port 20 Diagonal flow type blower 23 Exhaust port 25 Impeller 26 Bell mouth part 27 Air flow path 28 Hub board 30 Shroud board 31 Duct part 34 Outer periphery end

Claims (4)

A main body having a top plate for placing an object to be heated, heating means arranged in the lower part of the top plate in the main body, a control circuit for controlling the heating means, and outside air provided in the front of the main body into the main body An air intake port that sucks in, an air blowing unit that cools the inside of the main body by air sucked from the air intake port, and an exhaust port that discharges air blown by the air blowing unit from the inside of the main body, the air blowing unit being a centrifugal type at the inlet side It has an impeller having a blade portion of a blower and a blade portion of a mixed flow type blower on the outlet side, and an extension line of the outer peripheral end of the impeller and a rotating shaft of the impeller intersect on the blowout side when viewed from the side. A cooking device having a configuration in which the outer peripheral end is inclined with respect to the rotation axis, and a plurality of air flow paths are provided on the blowing side of the air blowing means to guide the cooling air to each part of the main body. The cooking device according to claim 1, wherein the impeller of the blower means includes a shroud plate, and the outermost peripheral portion of the shroud plate is bent so as to be concave toward the blade. The casing of the blower means, the suction side and the cylindrical bell-mouth portion having a circular hole, according to claim 1 or 2, wherein composed of a duct section having a plurality of blowing holes substantially Rectangular passageway blowing side Cooking device. The cooking device according to claim 3 , wherein at least one of the plurality of air flow paths is provided on a side of the duct portion of the casing.

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