JP2008180124A - Fan device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fan device capable of improving performance such as an air capacity characteristic and a noise characteristic. <P>SOLUTION: This fan device (11) is equipped with an impeller having a plurality of moving blades, a motor for driving the impeller, an outer frame body (15) for storing the impeller, and a supporting body (16) provided inside the outer frame body (15), for supporting the motor, and a plurality of center impeller type stator blades (17) disposed opposing the moving blades on the intake or the exhaust side of the moving blades, for connecting the outer frame body (15) to the supporting body (16). A flat part (28) with its inner peripheral surface substantially flat with respect to the axial direction and a diameter increased part (26) with its inner peripheral surface increasing outward in the radial direction as it approaches an axial opening end side, are provided to an opening part of the outer frame body (15) on the intake or the exhaust side where the center impeller type stator blades (17) are disposed. A connecting part (29) of radial outer ends of all the plurality of the center impeller type stator blades (17) and the outside frame body (15) is provided so that at least one portion of the connecting part (29) is positioned on the flat part on the inner peripheral surface of the outer frame body (15). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fan device.

  In recent electronic devices, the amount of heat generated by electronic components inside the device housing has been steadily increasing as performance is improved. In order to suppress the temperature rise of the electronic component, a fan device is used.

  The following two types can be considered as the main usage of the fan device.

(a) Discharge high-temperature air staying inside the housing to the outside of the housing
(b) Supply cooling air directly to the heating element (electronic component) to suppress the temperature rise of the heating element In the case of (a) above, high air volume and high static pressure are required as the air volume characteristics of the fan device . In the case of (b), further, performance related to the wind speed distribution characteristics is required. Here, the wind speed distribution characteristic is a characteristic indicating how the wind speed of the cooling air discharged from the exhaust port of the fan device is distributed. In both cases (a) and (b), quietness is an important performance factor.

  In a normal fan device, when cooling air is discharged from an exhaust port, the cooling air tends to spread outward in the radial direction of the impeller due to the influence of centrifugal force accompanying the rotation of the impeller. However, in the case of (b) above, the cooling efficiency becomes higher when more cooling air can be supplied to the heating element, so it is necessary to supply the cooling air so that it does not spread too much toward the heating element. There is.

Therefore, as a structure for suppressing the outward expansion of the cooling air in the radial direction, a stationary blade is provided at the exhaust port of the fan device (Patent Document 1).
Japanese Patent Laid-Open No. 2000-257597

  One of the causes of the noise of the fan device is the turbulence of the air flow due to the pedestal formed at the joint between the stationary blade and the outer frame of the housing in accordance with the injection molding. In this type of fan device, the stationary blade and the housing are formed as a continuous member by injection molding. With this injection molding, as shown in FIG. 6, a pedestal 5 is formed at the joint 4 between the stationary blade 1 and the outer frame 3 of the housing 2. Since the air flow collides with the pedestal portion 5, the air flow is disturbed, and problems such as a decrease in air flow characteristics and a decrease in noise characteristics occur.

  The reason why the pedestal 5 is formed will be described. The mold used for the injection molding includes an upper mold and a lower mold, which are brought into contact with each other from both sides in the axial direction 6 of the fan device to form a space inside the mold. The molten resin is injected into the space, and the mold is removed after the resin has cooled and solidified. Further, on the inner peripheral surface of the opening on the exhaust side and the intake side of the outer frame 3 of the housing 2, the inner peripheral surface is directed toward the axial opening end side in order to stabilize the air flow and increase the air volume. There may be a case where an enlarged-diameter portion 3a extending outward in the radial direction is provided. In such a case, when the housing 2 is viewed from the axial direction 6, a portion 7 that becomes a blind spot at the joint 4 between the enlarged diameter portion 3 a formed on the inner peripheral surface of the outer frame 3 of the housing 2 and the stationary blade 1. Occurs. The molten resin is injected into the blind spot portion 7 at the time of injection molding, and the base portion 5 is formed by cooling and solidifying the resin. In addition, there exists a method of performing an undercut process as a shaping | molding method which does not form this base part 5. FIG. However, in this method, since the shape of the mold becomes complicated and the number of processes increases, there arises a problem that the dimensional accuracy of the molded product is deteriorated and the manufacturing cost is significantly increased.

  Therefore, the problem to be solved by the present invention is to provide a fan device capable of improving performance such as air flow characteristics and noise characteristics.

  In order to solve the above-described problems, in the invention of claim 1, an impeller having a plurality of moving blades that inhale in the axial direction and exhaust in the axial direction by rotating, a motor that drives the impeller, and the impeller An outer frame body to be accommodated, a support body provided in the outer frame body and supporting the motor, and disposed on the intake side or exhaust side of the moving blade so as to face the moving blade; A plurality of both-end supported stationary blades that connect to the support, and an inner peripheral surface of the opening on the intake side or the exhaust side where the both-end stationary blades are disposed in the outer frame body Are provided with a flat portion that is substantially flat with respect to the axial direction, and a diameter-expanded portion that expands radially outward as the inner peripheral surface thereof moves toward the axial opening end side. The joints between all the radially outer ends of the outer frame and the outer frame body are at least part of the joints It is provided so as to be positioned in the flat portion of the inner peripheral surface of the outer frame member.

  According to a second aspect of the present invention, in the fan device according to the first aspect of the present invention, the outer frame body has a substantially rectangular frame-like planar shape when viewed from the axial direction, and the enlarged-diameter portion is the outer diameter portion. Provided around the four corners of the inner peripheral surface of the opening on the exhaust side or the intake side of the frame, and the flat portions are each of the inner peripheral surfaces of the opening on the exhaust side or the intake side of the outer frame. Provided between the enlarged diameter portions.

  According to a third aspect of the present invention, an impeller having a plurality of moving blades that inhale in the axial direction by rotating and exhaust in the axial direction, a motor that drives the impeller, and a substantially rectangular frame shape when viewed from the axial direction. An outer frame body that accommodates the impeller, a support body that is provided in the outer frame body and that supports the motor, and faces the moving blades on the intake side or the exhaust side of the moving blades A plurality of both-end supported stationary blades connecting the outer frame body and the support body, and an intake side or an exhaust side on which the both-end stationary blades of the outer frame body are disposed In the vicinity of the four corners of the inner peripheral surface of the opening, there are provided enlarged diameter portions that expand radially outward as the inner peripheral surface moves toward the axial opening end side, and adjacent to each other on the inner peripheral surface. A flat portion having an inner peripheral surface that is substantially flat with respect to the axial direction is provided between the corresponding expanded diameter portions. In the end face of the opening on the intake side or the exhaust side where the both-sided stationary vanes of the outer frame body are disposed, the flat portion and the enlarged diameter portion are disposed on both sides in the circumferential direction of the flat portion. And the joints between all the radially outer ends of the plurality of both-end supported vanes and the outer frame body are the intake side or the exhaust side of the outer frame body. Between the two intersections adjacent to each other across the flat portion on the inner peripheral surface of the opening.

  According to a fourth aspect of the present invention, in the fan device according to any one of the first to fourth aspects of the present invention, the fan device is disposed on the intake side or the exhaust side of the moving blade so as to face the moving blade, and has a diameter thereof. A plurality of cantilever type stationary blades supported in a cantilever state by joining a direction inner side end portion to the support.

  According to a fifth aspect of the present invention, in the fan device according to the fourth aspect of the present invention, the cantilevered stationary blade extends from the support body toward the enlarged diameter portion on the inner peripheral surface of the outer frame body. It is installed.

  According to a sixth aspect of the present invention, in the fan device according to the fourth or fifth aspect of the present invention, the maximum outer diameter of the cantilevered stationary blade is smaller than the minimum inner diameter of the inner peripheral surface of the outer frame body. small.

  According to a seventh aspect of the present invention, in the fan device according to any one of the fourth to sixth aspects, the both-end supported stationary blades and the cantilevered stationary blades are alternately arranged. Yes.

  According to an eighth aspect of the present invention, in the fan device according to any one of the first to seventh aspects, the outer frame body, the support body, and the both-supported stationary blade include a process including injection molding. It is the continuous resin member formed by.

  According to the first aspect of the present invention, the joint portion between the radially outer end portion of all the both-end supported vanes and the outer frame body is such that at least a part of the joint portion is within the outer frame body. Since it is provided so that it may be located in the flat part in a surrounding surface, the size of the base part formed by injection molding in the junction part about all the both-ends type stationary blades can be made small, or it can eliminate substantially. . Thereby, it is possible to suppress the air flow from colliding with the pedestal portion to cause turbulence of the air flow, and to improve performance such as air flow characteristics and noise characteristics.

  According to the second aspect of the present invention, each of the both sides of the outer frame body having a substantially square frame shape is provided with enlarged diameter portions around the four corners to stabilize the air flow and increase the air volume. The size of the pedestal formed by injection molding at the joint between the stationary stationary blade and the outer frame is reduced or substantially eliminated, and the air flow collides with the pedestal and the air flow is disturbed. It can be suppressed from occurring.

  According to the third aspect of the present invention, the outer frame body in which the joint portion between the radially outer end of each of the both-sided stationary vanes and the outer frame body has a substantially square frame-like planar shape. Between the two intersections of the flat portion and the enlarged diameter portion adjacent to each other on the inner peripheral surface of the opening portion on the intake side or the exhaust side of the intake portion, and adjacent to each other with the enlarged diameter portion interposed therebetween. It is the structure which cannot be provided between. For this reason, each of the both-end supported stationary blades and the outer frame is provided with a diameter-enlarged portion around the four corners of the outer frame body having a substantially square frame shape to stabilize the air flow and increase the air volume. The size of the pedestal formed by injection molding at the joint with the body is reduced or substantially eliminated, and the air flow collides with the pedestal and can be prevented from causing turbulence of the air flow. In addition, performance improvements such as airflow characteristics and noise characteristics can be achieved.

  According to the invention described in claim 4, since the cantilever type stationary blade does not form a joint portion with the outer frame body, it is formed at the joint portion between the stationary blade and the outer frame body and the joint portion. While avoiding the occurrence of turbulence or the like of the air flow generated in the pedestal portion, it is possible to provide a sufficient number of stationary blades necessary for air conditioning and perform sufficient adjustment of the air flow by the stationary blades.

  According to the invention described in claim 5, since the cantilever type stationary blade is extended from the support body toward the enlarged diameter portion on the inner peripheral surface of the outer frame body, There is no need to extend from the support toward the enlarged diameter portion of the outer frame. For this reason, it is possible to avoid the formation of the pedestal portion by injection molding at the joint portion between the both-end stationary vane and the outer frame body or to control the wind while suppressing the size of the pedestal portion formed at the joint portion. A necessary number of vanes can be provided to sufficiently adjust the air flow by the vanes.

  According to the invention described in claim 6, since the maximum outer diameter of the cantilever type stationary blade is smaller than the minimum inner diameter of the inner peripheral surface of the outer frame body, the cantilever type stationary blade is supported by the outer frame body and the support. It can be formed as a continuous resin member by a process including injection molding together with a body and a both-end stationary vane.

  According to the seventh aspect of the present invention, since the both-end stationary vanes and the cantilever-type stationary vanes are alternately arranged, the both-end supported vanes connecting the support body and the outer frame body. The number of joints formed between the stationary blade and the outer frame body can be reduced to improve the performance such as the air flow characteristic and the noise characteristic.

  According to the invention described in claim 8, since the outer frame body, the support body, and the both-end supported stationary blades are continuous resin members formed by a process including injection molding, the outer frame body, the support body, and Both-support type stationary blades can be mass-produced at low cost.

  1 to 3 are a plan view, a perspective view, and a sectional view of a fan device according to an embodiment of the present invention. 1 and 2, the impeller 12 is omitted for convenience.

  As shown in FIGS. 1 to 3, the fan device 11 includes an impeller 12, a motor 13, a circuit board 14, an outer frame body 15, a support body 16, and a plurality (for example, four) of both ends. A type stationary blade 17 and a plurality (for example, four) of cantilevered stationary blades 18 are provided. The outer frame body 15 and the support body 16 constitute a housing 19 of the fan device 11.

  The outer frame body 15, the support body 16, and the stationary blades 17 and 18 are formed as continuous members made of resin by injection molding. The mold used for the injection molding includes an upper mold and a lower mold, which are brought into contact with each other from both sides in the axial direction 23 of the fan device 11 to form a space inside the mold. A resin melted by heating is injected into the space, and the mold is removed after the resin has cooled and solidified.

  The impeller 12 includes a cup portion 21 that houses the motor 13 and a plurality of moving blades 22 that extend radially outward from the cup portion 21, and the moving blade 22 rotates to rotate in the axial direction. Intake into A and exhaust in axial direction 23. The outer frame body 15 is provided so as to surround the impeller 12. The support 16 is provided inside the outer frame 15 and supports the motor 13 and the circuit board 14.

  The both-end supported stationary blade 17 connects the outer frame body 15 and the support body 16, and extends radially from the support body 16 toward the outside in the radial direction of the fan device 11. The cantilever type stationary vane 18 is supported in a cantilever state by joining its radially inner end to the support body 16, and is directed from the support body 16 toward the radially outer side of the fan device 11. It is extended radially. These stationary blades 17 and 18 have an airfoil cross-sectional shape (for example, a slightly curved cross-sectional shape). More specifically, the axial cross-sectional shape of the stationary blades 17 and 18 is a blade shape inclined in a direction opposite to the direction in which the moving blade 22 of the impeller 12 is inclined with respect to the direction parallel to the axial direction 23 of the impeller 12. And the curved surfaces of the stationary blades 17 and 18 are curved so as to face the same direction with respect to the rotational direction of the moving blade 22. With the stationary blades 17 and 18 having such a blade shape, the cooling air generated by the impeller 12 is accurately and efficiently collected toward the shaft center.

  Such stationary blades 17 and 18 are provided on the exhaust side of the impeller 12 so that the cooling air generated by the impeller 12 can be efficiently collected. As a modification, the stationary blades 17 and 18 may be provided on the intake side of the impeller 12.

  The outer frame body 15 has a substantially rectangular frame shape (for example, a square frame shape) as viewed from the axial direction. In addition, there are four corners around the inner peripheral surface of the opening on the exhaust side of the outer frame 15 where the stationary blades 17 and 18 are provided in order to stabilize the exhausted air flow and increase the air volume. A diameter-expanded portion 26 is provided that expands in a trumpet shape (or a reverse taper shape) outward in the radial direction as the circumferential surface moves toward the opening end side in the axial direction 23. In addition, the inner peripheral surface of the outer frame 15 also has an axially open end of 23 in the vicinity of the four corners of the inner peripheral surface of the opening on the intake side in order to stabilize the intake air flow and increase the air volume. A diameter-expanded portion 27 is provided that spreads in a trumpet shape (or a reverse taper shape) outward in the radial direction toward the side.

  Further, the inner peripheral surface of the opening on the exhaust side of the outer frame body 15 where the stationary blades 17 and 18 are provided is between the respective enlarged diameter portions 26, and the inner peripheral surface is in the axial direction 23. A substantially flat flat portion 28 is provided. Similarly, the inner peripheral surface of the opening on the intake side of the outer frame body 15 does not appear on the drawing, but the inner peripheral surface is in the axial direction 23 between the enlarged diameter portions 27 adjacent to each other. And a substantially flat flat portion.

  On the end face of the opening on the exhaust side and the intake side of the outer frame body 15, intersections P of the flat portions 28 and the enlarged diameter portions 26 or 27 are formed on both sides in the circumferential direction of the flat portions 28, respectively. ing. There are eight intersections P on each end face of the opening on the exhaust side and the intake side of the outer frame 15.

  With respect to all of the plurality of both-end supported stationary blades 17, the joint portion 29 between the radially outer end portion of the stationary blade 17 and the inner peripheral surface of the outer frame body 15 is at least partially outside. The frame 15 is provided so as to be positioned on the flat portion 28 on the inner peripheral surface of the opening on the exhaust side. In other words, the joint portions 29 of all the both-support type stationary blades 17 and the outer frame body 15 are adjacent to each other with the flat portion 28 sandwiched between the inner peripheral surfaces of the exhaust-side openings of the outer frame body 15. It is provided between two intersections P.

  In the configuration shown in FIG. 1 and FIG. 2, the joint portions 29 of all the both-sided stationary vanes 17 and the outer frame body 15 are provided in the center portion in the circumferential direction of the flat portion 28 on the inner peripheral surface of the outer frame body 15. Thus, almost the entire joint 29 is located within the flat portion 28.

  Further, in the present embodiment, the both-end supported stationary blades 17 and the cantilevered stationary blades 18 are alternately arranged. Each cantilevered stationary blade 18 extends from the support 16 toward the enlarged diameter portion 26 on the inner peripheral surface of the outer frame 15. Further, the maximum outer diameter of the cantilever type stationary blade is larger than the minimum inner diameter of the inner peripheral surface of the outer frame body 15 so that the stationary blade 17 can be formed at a time together with the support body 16 and the outer frame body 15 by injection molding. Is set too small.

  The motor 13 includes a rotor magnet 31 attached to the inner peripheral surface of the impeller 12 and an armature 32 that generates torque between the rotor magnet 31. Such a motor 13 is accommodated in the cup part 21 provided in the center part of the above-mentioned impeller 12. The circuit board 14 includes a control circuit for controlling the rotation of the motor 13.

  As described above, according to the present embodiment, the joint portions 29 of all the both-end supported stationary blades 17 and the outer frame body 15 have a planar shape in which at least a part of the joint portion 29 is a substantially rectangular frame shape. It is provided so that it may be located in the flat part 28 in the internal peripheral surface of the outer frame 15 which has. For this reason, all the dual-supported stationary blades are provided while providing the enlarged diameter portions 26 around the four corners of the outer frame body 15 having a substantially square frame-like planar shape so as to stabilize the air flow and increase the air volume. 17, the size of the pedestal formed on the joint 29 by the above-described injection molding can be reduced or substantially eliminated. Thereby, it is possible to suppress the air flow from colliding with the pedestal portion to cause turbulence of the air flow, and to improve performance such as air flow characteristics and noise characteristics. In particular, in the configuration shown in FIGS. 1 and 2, the joint portions 29 of all the both-end supported stationary blades 17 and the outer frame body 15 are the central portions in the circumferential direction of the flat portions 28 on the inner peripheral surface of the outer frame body 15. Since substantially all of the joint portion 29 is located in the flat portion 28, the pedestal portion formed by injection molding is substantially eliminated for all the joint portions 29 of the both-end supported vanes 17. Be able to.

  Further, since the cantilever type stationary blade 18 does not form a joint portion with the outer frame body 15, the air flow generated at the joint portion between the stationary blade and the outer frame body 15 and the pedestal portion formed at the joint portion. It is possible to sufficiently adjust the air flow by the stationary blades by providing the number of stationary blades necessary for the air conditioning while avoiding the occurrence of turbulence.

  Further, since the cantilever type stationary blade 18 extends from the support body 16 toward the enlarged diameter portion 26 on the inner peripheral surface of the outer frame body 15, the both-end support type stationary blade 17 is removed from the support body 16. There is no need to extend toward the enlarged diameter portion 26 of the outer frame body 15. For this reason, avoiding the formation of the pedestal portion by injection molding at the joint portion 29 between the both-end stationary vane 17 and the outer frame body 15 or suppressing the size of the pedestal portion formed at the joint portion 29. By providing as many stationary blades as necessary for adjusting the airflow, the airflow can be sufficiently adjusted by the stationary blades.

  In addition, since the maximum outer diameter of the cantilever type stationary blade 18 is smaller than the minimum inner diameter of the inner peripheral surface of the outer frame body 15, the cantilever type stationary blade 18 is attached to the outer frame body 15, the support body 16, and the both-end support. Together with the stationary blade 17 of the mold, it can be formed as a continuous resin member by a process including injection molding.

  In addition, since the both-supported stationary blades 17 and the cantilevered stationary blades 18 are alternately arranged, the number of the both-supporting stationary blades 17 that connect the support body 16 and the outer frame body 15 is ensured. Thus, while ensuring the strength of the fan device 11, the number of joints 29 formed between the stationary blade 17 and the outer frame body 15 can be reduced to improve performance such as airflow characteristics and noise characteristics.

  Further, since the outer frame body 15, the support body 16, the both-end supported stationary blade 17 and the cantilevered stationary blade 18 are continuous resin members formed by a process including injection molding, they can be manufactured at low cost. Can be mass-produced.

  Below, the modification of the fan apparatus 11 which concerns on this embodiment is demonstrated.

  In the fan device 11 according to the above-described embodiment, the doubly-supported stationary blade 17 in which the joint portion 29 is provided between the adjacent intersections P across the flat portions 28 on the end face of the opening portion of the outer frame 15 is provided. Although provided one by one, as in the fan devices 11a and 11b shown in FIG. 4 (a) or FIG. 4 (b), the joint portion 29 is provided between the adjacent intersections P with the flat portions 28 interposed therebetween. Two or three cantilevered vanes 17 may be provided, or four or more may be provided.

  Further, in the fan device 11 according to the above-described embodiment, the both-end supported stationary blades 17 and the cantilevered stationary blades 18 are alternately arranged. However, like the fan device 11a shown in FIG. A plurality (three in FIG. 4 (a)) of both-end supported stationary blades 17 are arranged in succession, and one cantilever type is provided between each group of the continuously arranged both-end supported stationary blades 17. The stationary blade 18 may be arranged. Alternatively, as in the fan device 11b shown in FIG. 4 (b), a plurality of (two in FIG. 4 (b)) double-supported stationary blades 17 are arranged between each of the groups. The two cantilevered vanes 18 (two in FIG. 4B) may be continuously arranged.

  Further, in the fan device 11 according to the above-described embodiment, the cantilever type vane 18 is provided in addition to the both-end type vane 17, but the configuration is shown in FIGS. 5 (a) to 5 (c). As in the fan devices 11c to 11e, only the both-supported stationary blade 17 may be provided as the stationary blade, and the cantilevered stationary blade 18 may be omitted. 5A is obtained by omitting the cantilever type stationary blade 18 from the configuration shown in FIG. 1, and the configuration shown in FIG. 5B is changed from the configuration shown in FIG. The blade 18 is omitted, and the configuration of FIG. 5C is obtained by omitting the cantilever type stationary blade 18 from the configuration of FIG. 4A.

It is a top view of the fan device concerning one embodiment of the present invention. It is a perspective view of the fan apparatus of FIG. It is sectional drawing of the fan apparatus of FIG. (A), (b) is a top view which shows the modification of the fan apparatus of FIG. (A)-(c) is a top view which shows the modification of the fan apparatus of FIG. It is explanatory drawing regarding the base part formed in the junction part of the stationary blade of a fan apparatus, and an outer frame.

Explanation of symbols

11, 11a to 11e Fan device, 12 impeller, 13 motor, 14 circuit board, 15 outer frame body, 16 support body, 17 both-end supported stationary blade, 18 cantilevered stationary blade, 21 cup portion, 22 moving blade , 23 Axial direction, 26, 27 Expanded diameter portion, 28 Flat portion, 29 Joint portion, 31 Rotor magnet, 32 Armature.

Claims (8)

An impeller having a plurality of moving blades that inhale in the axial direction by rotating and exhaust in the axial direction;
A motor for driving the impeller;
An outer frame housing the impeller;
A support provided in the outer frame and supporting the motor;
A plurality of both-end supported stationary blades disposed on the intake side or the exhaust side of the moving blade so as to face the moving blade and connecting the outer frame body and the support;
With
The opening on the intake side or the exhaust side where the both-sided stationary vanes are disposed in the outer frame body has a flat portion whose inner peripheral surface is substantially flat with respect to the axial direction, and its inner peripheral surface is an axis. A diameter-expanded portion that extends radially outward as it goes toward the direction opening end side is provided,
The joints between all the radially outer ends of the plurality of both-end stationary vanes and the outer frame body are such that at least a part of the joint portions is flat on the inner peripheral surface of the outer frame body. A fan device, characterized in that the fan device is provided so as to be located in a section. The fan device according to claim 1,
The outer frame body has a substantially rectangular frame-like planar shape when viewed from the axial direction,
The enlarged diameter portion is provided around four corners on the inner peripheral surface of the exhaust side or intake side opening of the outer frame body,
The fan device, wherein the flat portion is provided between the respective enlarged diameter portions on an inner peripheral surface of an opening portion on an exhaust side or an intake side of the outer frame body. An impeller having a plurality of moving blades that inhale in the axial direction by rotating and exhaust in the axial direction;
A motor for driving the impeller;
An outer frame body having a substantially rectangular frame-like planar shape when viewed from the axial direction and containing the impeller;
A support provided in the outer frame and supporting the motor;
A plurality of both-end supported stationary blades arranged on the intake side or exhaust side of the moving blades, facing the moving blades, and connecting the outer frame body and the support;
With
Around the four corners of the inner peripheral surface of the opening on the intake side or the exhaust side where the both-sided stationary vanes of the outer frame body are arranged, the diameter increases as the inner peripheral surface moves toward the axial opening end side. A diameter-expanded portion extending outward in the direction is provided, and between the diameter-expanded portions adjacent to each other on the inner peripheral surface, a flat portion whose inner peripheral surface is substantially flat with respect to the axial direction is provided.
On the end surface of the opening on the intake side or the exhaust side where the both-sided stationary vanes of the outer frame body are disposed, the intersections of the flat portion and the enlarged diameter portion are on both sides in the circumferential direction of the flat portion. Each is composed,
The joints between all the radially outer end portions of the plurality of both-end stationary vanes and the outer frame body are on the inner peripheral surface of the intake side or exhaust side opening of the outer frame body, A fan device provided between two intersections adjacent to each other across a flat portion. The fan device according to any one of claims 1 to 4,
A plurality of cantilevers supported in a cantilever state by being arranged opposite to the rotor blades on the intake side or the exhaust side of the rotor blades, and having their radially inner end joined to the support body A fan device further comprising a stationary vane of a mold. The fan device according to claim 4,
The fan apparatus, wherein the cantilever type stationary blade extends from the support body toward the enlarged diameter portion on the inner peripheral surface of the outer frame body. The fan device according to claim 4 or 5,
The fan device according to claim 1, wherein a maximum outer diameter of the cantilever type stationary blade is smaller than a minimum inner diameter of an inner peripheral surface of the outer frame body. The fan device according to any one of claims 4 to 6,
The fan apparatus, wherein the both-end supported stationary blades and the cantilevered stationary blades are alternately arranged. The fan device according to any one of claims 1 to 7,
The fan apparatus, wherein the outer frame body, the support body, and the both-end support vane are continuous resin members formed by a process including injection molding.

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