JP2010203715A - Cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooker capable of enhancing cooling efficiency and reducing noise and vibration. <P>SOLUTION: A centrifugal fan 5 includes a plurality of blades 11, a shroud part 12 connecting a plurality of the blades 11 near a fan suction port 7 and formed with a wall surface for guiding cooling wind from a suction part to an approximately outer peripheral direction inside the centrifugal fan 5, a shroud 12 connecting a plurality of the blades 11 on the downstream side of the cooling wind and formed with a wall surface for guiding the wind from the suction part to the approximately outer peripheral direction, and a main plate 13 formed with a wall surface for connecting a plurality of the blades 11 at the downstream side of the cooling wind and guiding the wind from the suction part to the approximately outer peripheral direction. Outer diameters of the shrouds 12 are composed to be larger than an outer diameter of the main plate 13. Change of a direction of the cooling wind inside the centrifugal fan 5 is less than 90 degrees. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a configuration of a cooling fan for cooling a heat generating component in a heating cooker.

Conventionally, a fan of this type of heating cooker does not have a shroud portion with an inner wall having a shape for connecting the blades and smoothly guiding the cooling air from the substantially center of the fan to the substantially outer peripheral direction. The outer diameter is also substantially constant (for example, see Patent Document 1).
JP 2008-209013 A

  However, in the above-described conventional configuration, when the fan outer diameter is increased to increase the static pressure and the air volume, which are the fan performance, and the rotation speed is decreased to reduce the noise at the same static pressure and the same air volume. The problem is that the height of the product is limited and the outside diameter of the fan cannot be increased. If the outside diameter is increased, the distance between the fan case wall housing the fan and the fan will be close, and noise will increase. If the outer diameter of the fan is uniformly increased, the area of the exhaust port of the fan becomes narrower, and the outer diameter of the fan cannot be increased. Thus, the cooling efficiency of the internal parts is poor and the durability may be impaired.

  The present invention solves the above-mentioned conventional problems, characterized in that the outer diameter of the shroud portion constituting the fan and the fan in the vicinity of the main plate is such that the outer diameter of the shroud portion is larger than the outer diameter of the main plate. It is an object of the present invention to provide a cooking device with high commercial value that has low noise generated by the device, is easy to use, has high cooling efficiency, and is highly reliable.

  In order to solve the above-described conventional problems, a heating cooker according to the present invention includes a heating source, a main body outline that houses the heating source, an intake port and an exhaust port provided in the main body outline, and a bottom surface of the main body outline. A centrifugal fan that blows cooling air sucked from the intake port into the outer casing and discharges it from the exhaust port by rotating around a substantially horizontal rotating shaft, and the centrifugal fan is housed inside and is approximately relative to the bottom surface of the main body outer shell. A fan case formed with a fan air inlet that is an opening formed so as to face the air inlet of the centrifugal fan and a fan air outlet that blows out cooling air sucked from the fan air inlet, and the centrifugal fan A motor that rotates, and a control board that controls the output of the heating source provided on the downstream side of the cooling air blown from the fan outlet, and the centrifugal fan includes a plurality of A plurality of blades connected to each other in the vicinity of the fan intake port, and a shroud portion formed with a wall surface for guiding the cooling air from the intake portion in a substantially outer circumferential direction in the centrifugal fan; And a main plate formed with a wall surface that guides air from the intake portion in a substantially outer circumferential direction, and the outer diameter of the shroud portion is larger than the outer diameter of the main plate. It is configured to be large, and the change in the direction of the cooling air inside the centrifugal fan is less than 90 degrees.

  As a result, the static pressure and the air volume, which are the blowing performance of the fan, can be maximized, the noise generated by the fan can be suppressed, and the cooling efficiency is improved.

The heating cooker of the present invention can maximize the static pressure and the air volume, which are the blowing performance of the fan, and can suppress the noise generated by the fan, increase the cooling efficiency, increase the cooling efficiency of the internal parts, and durability Rich in equipment, low noise generated by equipment, good usability and high product value.

  The first invention rotates a heating source, a main body shell that houses the heating source, an intake port and an exhaust port provided in the main body shell, and a rotation axis that is substantially horizontal to the bottom surface of the main body shell. A centrifugal fan that blows the cooling air sucked from the air inlet into the outer shell of the main body and discharges it from the exhaust port, and the centrifugal fan is housed inside and is substantially perpendicular to the bottom surface of the outer shell of the main body and at the suction portion of the centrifugal fan A fan case formed with a fan air inlet that is an opening formed so as to oppose and a fan air outlet that blows out the cooling air sucked from the fan air inlet, a motor that rotates the centrifugal fan, and the fan air outlet A control board for controlling the output of a heating source provided on the downstream side of the cooling air blown from the mouth, and the centrifugal fan includes a plurality of blades and a vicinity of the fan air inlet. A shroud portion that connects the plurality of blades and has a wall surface for guiding the cooling air from the air intake portion toward the substantially outer periphery in the centrifugal fan, and the plurality of blades on the downstream side of the cooling air. The main plate is formed with a wall surface that is connected and has a wall surface that guides air from the air intake portion in a substantially outer circumferential direction. The outer diameter of the shroud portion is configured to be larger than the outer diameter of the main plate, and the centrifugal plate The change in the airflow direction of the cooling air inside the fan is less than 90 degrees, so that the static pressure and the air volume, which are the air blowing performance of the fan, can be maximized and the noise generated by the fan can be suppressed. The cooling efficiency of the internal parts is high, the durability is high, and the commercial value can be increased. As a result, the noise generated by the device is low, the usability is good, the reliability is high, and the commercial value can be increased.

  According to the second invention, in particular, in the first invention, by forming the outer diameter of the blade from the shroud portion to the main plate side so as to become smaller as it approaches the main plate, The air volume can be maximized, the noise generated by the centrifugal fan can be suppressed, the cooling efficiency can be improved, the cooling efficiency of the internal parts is high, the durability is high, and the commercial value can be increased. In addition, the noise generated by the equipment is low, it is easy to use, has high reliability, and can increase the commercial value.

  According to a third invention, in particular, in the first or second invention, the centrifugal fan is cut by post-processing, and the centrifugal fan is a first for adjusting a weight imbalance of the centrifugal fan generated in processing. By further including the convex portion, it is possible to easily remove the weight imbalance caused by processing. Thereby, the weight imbalance of a centrifugal fan can be reduced easily and the noise and vibration which an apparatus generate | occur | produces can be suppressed. Thereby, it can be set as the user-friendly cooking device with little vibration noise. Furthermore, by suppressing the vibration of the centrifugal fan, the vibration applied to the motor bearing and other parts can be suppressed, deterioration due to the vibration can be prevented, and a highly reliable cooker with high commercial value can be obtained.

  According to a fourth aspect of the present invention, in particular, in the third aspect of the invention, the first convex portion is provided on the centrifugal fan so as to be substantially concentric with the rotating shaft. Even if the imbalance occurs in any direction on the circumference of the fan, the structure can be easily removed. Thereby, it can be set as the user-friendly cooking device with little vibration noise. Furthermore, by suppressing the vibration of the centrifugal fan, the vibration applied to the motor bearing and other parts can be suppressed, deterioration due to the vibration can be prevented, and a highly reliable cooker with high commercial value can be obtained.

In a fifth aspect of the invention, in particular, in the fourth aspect of the invention, the first convex portion is provided on the shroud portion of the centrifugal fan, so that the centrifugal fan is cut by an automatic machine or the like while rotating the centrifugal fan in post-processing. Even if the weight imbalance caused by processing occurs in any direction on the circumference of the centrifugal fan, the structure can be more easily removed. Thereby, it can be set as the user-friendly cooking device with little vibration noise. Furthermore, by suppressing the vibration of the centrifugal fan, the vibration applied to the motor bearing and other parts can be suppressed, deterioration due to the vibration can be prevented, and a highly reliable cooker with high commercial value can be obtained.

  According to a sixth aspect of the present invention, in the fifth aspect of the invention, the fan case has a second convex portion facing the first convex portion and formed substantially concentrically with the rotation shaft. The static pressure and air volume can be maximized and the noise generated by the centrifugal fan can be suppressed, the cooling efficiency is high, the cooling efficiency of internal parts is high, the durability is high, and the commercial value can be increased. .

(Embodiment 1)
1, 2, 3, and 4 show detailed views of the heating cooker according to the first embodiment of the present invention.
By rotating the heating source 1, the main body outer shell 2 that houses the heating source 1, the intake port 3 and the exhaust port 4 provided in the main body outer shell 2, and the bottom surface of the main body outer shell 2 about a rotation axis that is substantially horizontal. A centrifugal fan 5 that blows cooling air sucked from the inlet 3 into the outer shell 2 and discharges it from the outlet 4, a fan case 6 that houses the centrifugal fan 5, and a bottom surface of the outer shell 2 are substantially perpendicular to each other. A fan case 6 in which a fan air inlet 7, which is an opening formed to face the air intake portion of the centrifugal fan 5, and a fan air outlet 8 for blowing out cooling air sucked from the fan air inlet 7 are formed, and the centrifugal fan 5. And a control board 10 for controlling the output of the heating source 1 provided on the downstream side of the cooling air blown from the fan outlet 8, and the centrifugal fan 5 includes a plurality of blades 11 and , Fan intake 7 is connected to the plurality of blades 11, and the shroud portion 12 is formed with a wall surface for guiding cooling air from the intake portion to the substantially outer circumferential direction in the centrifugal fan 5. A main plate 13 connected on the downstream side and formed with a wall surface that guides air from the intake portion in a substantially outer circumferential direction, and configured so that the outer diameter of the shroud portion 12 is larger than the outer diameter of the main plate 13, A change in the direction of the cooling air inside the centrifugal fan is less than 90 degrees.

  About the structure of the heating cooker comprised as mentioned above, the effect | action is demonstrated below.

  A heating cooker using a flame such as a gas as a heating source 1 or an induction heating coil that generates a magnetic field to heat a pan or the like, or a heating cooker that generates Joule heat by passing an electric current through an electrical resistance In this case, the control board 10 that controls the operation of the cooking device is heated by the heat generated by the heating source. Further, in the cooking device that heats the pan with the induction heating coil, the induction heating coil and the control board 10 generate heat by the current flowing through the induction heating coil and the circuit of the internal control board 10 and the electric resistance of the circuit. In order to lower the temperature of the induction heating coil and the components on the control board 10 to below the heat-resistant temperature, a forced air-cooling type cooling configuration is required in which the air outside the heating cooker is sucked and the internal components are cooled and then exhausted. Become.

  In the conventional heating cooker, the outer diameter of the cooling fan upstream of the centrifugal fan 5 in the vicinity of the fan inlet 7 and the outer diameter of the centrifugal fan 5 downstream of the cooling air are substantially the same. In the configuration as described above, by increasing the outer diameter of the centrifugal fan 5, the static pressure and the air volume, which are the blowing performance of the centrifugal fan 5, are increased, the rotational speed of the centrifugal fan 5 is decreased, and the same static pressure and the same air volume are obtained. When it is going to implement | achieve the structure which reduces the noise which generate | occur | produces from the centrifugal fan 5 of this, the subject that the outer diameter of the centrifugal fan 5 cannot be enlarged because there is a restriction | limiting of the height direction of a heating cooker, and when an outer diameter is enlarged, a centrifugal fan The problem is that the distance between the wall of the fan case 6 housing the fan 5 and the centrifugal fan 5 is close and the noise increases, and the area of the fan outlet 8 of the centrifugal fan 5 is increased when the outer diameter of the centrifugal fan 5 is increased uniformly. However, there is a problem that the outside diameter of the fan cannot be increased due to the narrowing of the fan, and the cooling efficiency of the internal parts is poor, and the durability may be impaired.

  In the present embodiment, since the outer diameter of the shroud portion 12 is larger than the outer diameter of the main plate 13, the static pressure and the air volume, which are the blowing performance of the centrifugal fan 5, can be maximized and the centrifugal fan 5 is generated. Noise can be suppressed, and a heating cooker with high commercial value can be obtained that has high cooling efficiency of internal components and high durability, and has improved cooling efficiency of members near the control board 10 and the heating source 1. Thereby, it can be set as the heating cooker with the high product value which is low in the noise which an apparatus generate | occur | produces, is easy to use and is rich in reliability.

  As shown in FIG. 4, the ratio of the outer diameter of the shroud portion 12 (dimension a in the drawing) and the outer diameter of the main plate 13 (dimension b in the drawing) is the outer diameter of the shroud portion 12 (dimension a in the drawing): the main plate 13. Is preferably in the range of 1.01: 1.0 to 2.0: 1.0. This range is desirable because the static pressure and air volume can be maximized. The ratio of the inner dimension of the fan case 6 (dimension c in the figure) to the outer diameter of the shroud part 12 (dimension a in the figure) is the inner dimension of the fan case 6 (dimension c in the figure): the outer diameter of the shroud part 12. (Dimension a in the figure) = 1.01: 1.0 to 2.0: 1.0 is desirable. If it is this range, since the noise can be reduced while maximizing the static pressure and air volume which are the ventilation performance of the centrifugal fan 5, it is desirable.

  Further, the fan intake port 7 is not provided in the vicinity of the intake port 3 but is installed at a position different from substantially the same plane, for example, in a substantially vertical plane, thereby forming an intake path from the intake port 3 of the centrifugal fan 5 to the fan intake port 7. By doing so, even if boiled soup or the like as a cooked product is sucked into the intake port 3, it immediately reaches the fan intake port 7, and the centrifugal fan 5 blows off the water droplets by centrifugal force, thereby reducing the possibility of entering the cooker. effective. The substantially vertical plane is preferably a plane in which the angle θ1 in FIG. 4 is 60 to 120 degrees. A heat generating component that needs to be cooled generally exists in this range with respect to the cooling fan. The change in the angle θ2 of the flow of the cooling air is less than a right angle, and the angle θ2 is preferably 0 ≦ θ2 <90 degrees. If the course is changed when the cooling air is 90 or more, the flow is not smooth, and the flow rate, which is the blowing performance of the fan, may be reduced. The cross-sectional shapes of the shroud portion 12 and the main plate 13 are configured obliquely, that is, the angle formed by the cooling air blowing direction at the outer peripheral portion and the substantially horizontal direction as the cooling air suction direction in the cross-sectional shape of the shroud portion 12 or the main plate 13. By setting (θ3, θ4 in FIG. 4) to 0 or more and less than 90 degrees, the centrifugal fan 5 that smoothly guides the flow of cooling air inside the centrifugal fan 5 with less than 90 degrees can be obtained. The same effect can be obtained by using a multi-blade fan (sirocco fan), a turbo fan, a radial fan, or other centrifugal fans as the centrifugal fan 5. The same effect can be obtained not only in the built-in type cooking device incorporated in the kitchen but also in the stationary type cooking device installed on the table. With the configuration as described above, the static pressure and the air volume that are the blowing performance of the centrifugal fan 5 can be maximized, and the noise generated by the centrifugal fan 5 can be suppressed. It can be set as the cooking appliance with the high commercial value which is high in the durability of the cooling efficiency of an internal component with high cooling efficiency of a member, and is rich in durability. Thereby, it can be set as the heating cooker with the high product value which is low in the noise which an apparatus generate | occur | produces, is easy to use and is rich in reliability.

(Embodiment 2)
FIG. 5 shows a detailed view of a heating cooker according to the second embodiment of the present invention. Since the basic configuration is the same as that of the first embodiment, only the difference in configuration will be described.

As shown in FIG. 5, the centrifugal fan 5 is made smaller as the outer diameter of the blade 11 approaches the main plate from the shroud portion 12 to the main plate 13 side. As a result, the blade 11 rotates, and the area for blowing the cooling air can be increased as compared with the first embodiment, and the static pressure and the air volume, which are the air blowing performance of the centrifugal fan 5, can be maximized. By adopting the configuration as described above, the same air volume can be obtained with a smaller rotational speed than in the first embodiment, and the rotational speed is reduced to suppress the noise generated by the cooling fan 15. With the configuration as described above, the static pressure and the air volume that are the blowing performance of the centrifugal fan 5 can be maximized, and the noise generated by the centrifugal fan 5 can be suppressed, and the vicinity of the control board 10 and the heating source 1 can be suppressed. It can be set as the cooking appliance with the high commercial value which is rich in durability with the high cooling efficiency of the internal component which raised the cooling efficiency of the member. Thereby, it can be set as the heating cooker with the high product value which is low in the noise which an apparatus generate | occur | produces, is easy to use, and is rich in reliability.

(Embodiment 3)
FIG. 6 shows a detailed view of a heating cooker according to the third embodiment of the present invention. Since the basic configuration is the same as in the first and second embodiments, only the difference in configuration will be described.

  As shown in FIG. 6, the centrifugal fan 5 further includes a first convex portion 14, the first convex portion 14 is cut by post-processing, and the weight unbalance of the centrifugal fan 5 generated in processing can be adjusted. To do. Thereby, the weight imbalance of the centrifugal fan 5 which arises on a process can be reduced easily, and the noise and vibration which a heating cooker generate | occur | produce can be suppressed. Thereby, it can be set as the user-friendly cooking device with little vibration noise. Further, by suppressing the vibration of the fan, it is possible to suppress the vibration applied to the motor bearing and other components, prevent deterioration due to the vibration, and provide a highly reliable cooker with high commercial value. If the direction in which the weight imbalance occurs is known in advance, the shape of the centrifugal fan 5 may be configured such that the first convex portion 14 is provided in the direction to cancel the weight unbalance and the weight unbalance of the centrifugal fan 5 is reduced. . Thereby, it can be set as the user-friendly cooking device with less vibration noise.

(Embodiment 4)
FIG. 7 shows a detailed view of a heating cooker according to the fourth embodiment of the present invention. Since the basic configuration is the same as that of the third embodiment, only the difference in configuration will be described.

  As shown in FIG. 7, the first convex portion 14 is configured to be provided substantially concentrically on the centrifugal fan 5. Thereby, the weight imbalance of the centrifugal fan 5 which arises on a process can be adjusted easily. Even in the case where it is unclear in which direction the weight imbalance occurs in advance, the configuration can be easily adjusted by post-processing. Thereby, it can be set as the user-friendly cooking device with little vibration noise. Further, by suppressing the vibration of the fan, it is possible to suppress the vibration applied to the motor bearing and other components, prevent deterioration due to the vibration, and provide a highly reliable cooker with high commercial value.

(Embodiment 5)
FIG. 8 shows a detailed view of a heating cooker according to the fifth embodiment of the present invention. Since the basic configuration is the same as that of the fourth embodiment, only the difference in configuration will be described.

  As shown in FIG. 8, the first convex portion 14 is provided on the shroud portion 12 of the centrifugal fan 5. On the shroud portion 12, there is almost no flow of cooling air outside the centrifugal fan 5, and the relative speed between the first convex portion 14 and the cooling air is lower than that inside the centrifugal fan 5. Therefore, the air turbulence generated by the first convex portion 14 is small. That is, the noise generated by the centrifugal fan 5 can be reduced. Thereby, it can be set as the user-friendly cooking device with little vibration noise. Further, by suppressing the vibration of the fan, it is possible to suppress the vibration applied to the motor bearing and other components, prevent deterioration due to the vibration, and provide a highly reliable cooker with high commercial value.

(Embodiment 6)
FIG. 9 shows a detailed view of a heating cooker according to the sixth embodiment of the present invention. Since the basic configuration is the same as that of the fifth embodiment, only differences will be described.

As shown in FIG. 9, the first convex portion 14 provided substantially concentrically on the centrifugal fan 5 is opposed, and the second convex portion 15 is provided substantially concentrically on the fan case 6. By adopting the above-described configuration, the cooling air flowing back on the air path extending from the outer surface of the shroud portion 12 to the inner wall by flowing backward through a gap slightly generated in the configuration of the centrifugal fan 5 and the fan case 6 from the outer peripheral side of the centrifugal fan 5. It can be set as the structure which blocks some. Thereby, it becomes the structure which can increase the static pressure and air volume which are the ventilation performance of the centrifugal fan 5. FIG. Furthermore, there is almost no flow of cooling air on the shroud portion 12 outside the centrifugal fan 5, and the relative speed between the first convex portion 14 and the cooling air can be further reduced as compared with the inside of the centrifugal fan 5. . Therefore, the air turbulence generated by the first convex portion 14 is small. That is, the noise generated by the centrifugal fan 5 can be reduced. Thereby, it can be set as the user-friendly cooking device with little vibration noise. Further, by suppressing the vibration of the fan, it is possible to suppress the vibration applied to the motor bearing and other components, prevent deterioration due to the vibration, and provide a highly reliable cooker with high commercial value.

  As described above, the heating cooker according to the present invention can be a user-friendly heating cooker with less vibration noise. Further, by suppressing the vibration of the fan, it is possible to suppress the vibration applied to the motor bearing and other components, prevent deterioration due to the vibration, and provide a highly reliable cooker with high commercial value. Therefore, it is easy to use, has high durability of internal parts, and can be increased in commercial value, so that it can also be applied to other uses such as cooking equipment that constitutes the same forced air cooling system.

Detailed view of heating cooker in Embodiment 1 of the present invention Detailed view of heating cooker in Embodiment 1 of the present invention Front view of the vicinity of the centrifugal fan in the first embodiment of the present invention The right sectional view near the centrifugal fan in Embodiment 1 of the present invention The right sectional view near the centrifugal fan in Embodiment 2 of the present invention Right sectional view near the centrifugal fan in Embodiment 3 of the present invention The rear view of the centrifugal fan in Embodiment 4 of this invention The right sectional view near the centrifugal fan in Embodiment 5 of the present invention The right sectional view near the centrifugal fan in Embodiment 6 of the present invention

DESCRIPTION OF SYMBOLS 1 Heating source 2 Main body outline 3 Intake port 4 Exhaust port 5 Centrifugal fan 6 Fan case 7 Fan intake port 8 Fan blowout port 9 Motor 10 Control board 11 Wing | blade 12 Shroud part 13 Main plate 14 1st convex part 15 2nd convex part

Claims (6)

A heating source, a main body shell that houses the heating source, an intake port and an exhaust port provided in the main body outer shell, and an intake air from the intake port by rotating about a rotation axis that is substantially horizontal to the bottom surface of the main body shell A centrifugal fan that blows the cooled air into the outer shell of the main body and discharges it from the exhaust port; and the centrifugal fan is housed inside and is substantially perpendicular to the bottom surface of the outer shell of the main body and faces the suction portion of the centrifugal fan. A fan case formed with a fan air inlet that is a formed opening and a fan air outlet that blows out the cooling air sucked from the fan air inlet, a motor that rotates the centrifugal fan, and air blown from the fan air outlet And a control board for controlling the output of the heating source provided downstream of the cooling air, and the centrifugal fan includes a plurality of blades and a front fan in the vicinity of the fan air inlet. A shroud portion that connects a plurality of blades and has a wall surface for guiding the cooling air in the centrifugal fan from the air intake portion in a substantially outer circumferential direction; and the plurality of blades on the downstream side of the cooling air And a main plate formed with a wall surface that guides the air from the intake portion in a substantially outer circumferential direction, and the outer diameter of the shroud portion is configured to be larger than the outer diameter of the main plate, and The cooking device according to claim 1, wherein a change in the direction of the cooling air inside the centrifugal fan is less than 90 degrees. The cooking device according to claim 1, wherein the outer diameter of the wing is formed so as to become smaller toward the main plate from the shroud portion to the main plate side. The centrifugal fan is cut by post-processing, and the centrifugal fan further includes a first convex portion for adjusting a weight imbalance of the centrifugal fan generated in the processing. The cooking device described. The cooking device according to claim 3, wherein the first convex portion is provided on the centrifugal fan substantially concentrically with the rotating shaft. The cooking device according to claim 4, wherein the first convex portion is provided on a shroud portion of the centrifugal fan. The cooking device according to claim 5, wherein the fan case has a second convex portion that is opposed to the first convex portion and is formed substantially concentrically with the rotation shaft.

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