JP2016098742A - Fan shroud - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fan shroud capable of suppressing increase in noise due to arrangement of an electronic component while suppressing a structure from being more complex.SOLUTION: A demarcation wall 162d of a fan shroud 16 is so formed that a wall height Hw of the demarcation wall 162d is shorter than a height Hop of a fan accommodation hole 161a, and arranged to partition off a recessed space 162j where a register 17 is arranged and the fan accommodation hole 161a. Therefore, pressure variation of air caused as the air flows in the recessed space 162j during fan operation can be suppressed as compared with a constitution in which the demarcation wall 162d is not provided. Noise generated owing to the arrangement of the register 17 is larger and larger as the pressure variation of the air is larger and larger, so the demarcation wall 162d suppresses the pressure variation to suppress increase of the noise.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a structure of a fan shroud that guides air to a blower fan.

  2. Description of the Related Art Conventionally, in an electric blower that is rotationally driven by a motor, when an electrical component such as a register is used for controlling the rotation speed of the fan, the electrical component is attached to a fan shroud in order to cool the electrical component. Therefore, it is necessary to form a box-like box space for arranging electrical components in the middle of a path through which air flows in the fan shroud. For example, the box space is formed in a bus portion as an air guide portion that guides air to the fan.

  However, when the fan is driven to rotate, air flows along the bus shroud bus portion and is sucked into the fan. However, when a box space is formed in the fan shroud bus portion, the air is guided to the bus shroud portion and flows. A pressure fluctuation due to the existence of the box space is generated in the air. Due to the air pressure fluctuation, the fan noise, in particular, the primary component of the fan speed included in the fan noise may be deteriorated.

  For example, Patent Document 1 discloses a fan shroud having a structure that suppresses deterioration of fan noise caused by the arrangement of such electrical components. The fan shroud of Patent Document 1 is arranged so as to close the space between the heat exchanger and the motor-driven fan to form a ventilation path. Further, electronic components for controlling the fan motor are installed outside the fan shroud air passage. The fan shroud has an air blowing hole, an inlet opening adjacent to the opening edge of the air blowing hole and opening toward the outer peripheral edge of the fan, and a part of the fan wind is introduced from the inlet to An air guide passage for blowing on the parts is formed.

  The fan shroud of Patent Document 1 is configured in this manner, so that, for example, an electronic device for fan motor control can be used without causing deterioration in layout performance in the vehicle front-rear direction, heat dissipation performance, and noise. It is said that a heating element, such as a component, can be efficiently cooled.

JP 2008-309121 A

  The fan shroud of Patent Document 1 certainly has a structure for air-cooling electrical components such as electronic components. However, it is necessary to form an extra air guide path in order to guide air to the electrical component, and the fan shroud of Patent Document 1 has a new problem that the structure of the fan shroud becomes too complicated. For example, if the structure of the fan shroud is complicated as disclosed in Patent Document 1, when the fan shroud is manufactured by injection molding, the mold for injection molding becomes complicated. Man-hours and mold production costs required for the increase. Alternatively, it may occur that the fan shroud cannot be manufactured by injection molding.

  In view of the above-described points, an object of the present invention is to provide a fan shroud that can suppress the deterioration of noise caused by the arrangement of electrical components while suppressing the complexity of the structure.

In order to achieve the above object, in the invention of the fan shroud according to claim 1, the air is sucked from one side in the axial direction (DRa) of the fan shaft center by rotating about the fan shaft center (CLf). A fan housing part (161) in which a fan housing hole (161a) for housing the fan (14) is formed;
A duct air guide surface (162a) formed so as to extend from the fan housing hole to the outside in the radial direction (DRr) of the fan shaft center and guiding the air so that the air converges and is sucked into the fan; A duct portion (162) in which a concave space (162j) in which an electrical component (17) is disposed at a part of the duct wind guide surface and is recessed from the duct wind guide surface is formed;
The concave space is provided adjacent to the fan receiving hole,
The duct portion protrudes toward the one side in the axial direction with respect to the concave bottom surface (162k) that forms the bottom of the concave space, and is disposed so as to separate the concave space from the fan housing hole. A partition wall (162d),
The partition wall has a wall height (Hw) from the base end (162g) of the partition wall in the axial direction to the tip (162h) in the axial direction. 161 b) and is formed to be lower than the height (Hop).

  According to the above-described invention, the partition wall is formed such that the wall height of the partition wall in the axial direction is lower than the height of the fan housing hole, and the space between the recessed space in which the electrical component is disposed and the fan housing hole is formed. Since it is arranged so as to divide the space, it is possible to suppress fluctuations in air pressure caused by the air flowing into the concave space when the fan is operated, compared to a configuration in which the partition wall is not provided. And since the noise resulting from arrangement | positioning of an electrical component becomes so large that the pressure fluctuation of the air is large, the deterioration of the noise can be suppressed because a partition wall suppresses the pressure fluctuation.

  Moreover, since the partition wall is a wall protruding to the one side in the axial direction with respect to the concave bottom surface of the concave space, for example, compared with the case where the fan shroud structure of Patent Document 1 is adopted, the fan shroud structure is complicated. Can be suppressed.

  In addition, each code | symbol in the bracket | parenthesis described in a claim and this column is an example which shows a corresponding relationship with the specific content as described in embodiment mentioned later.

It is a perspective view of the air blower 10 which has the fan shroud 16 with which this invention was applied. It is the expansion perspective view which expanded the II section of Drawing 1, and is a figure showing fan shroud 16 simple substance. FIG. 3 is a sectional view taken along line III-III in FIG. 2. FIG. 4 is a view taken along arrow IV in FIG. 2. FIG. 5 is an IV arrow view of the fan shroud 16 viewed from the direction of arrow IV in a comparative example with respect to the embodiment of FIG. 4, corresponding to FIG. 4. It is a graph which shows the result of having measured the noise of the fan 14 with each of embodiment of FIG. 4, and the comparative example of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments including other embodiments described later, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
FIG. 1 is a perspective view of a blower 10 having a fan shroud 16 to which the present invention is applied. A blower 10 shown in FIG. 1 is an axial flow blower for a vehicle that allows outside air, that is, air, to flow through a radiator 12 (see FIG. 3). The radiator 12 is a heat exchanger that cools the cooling water of the traveling engine of the vehicle by exchanging heat with the outside air.

  The blower 10 is disposed on the rear side of the vehicle with respect to the radiator 12. Specifically, the blower 10 is provided on the downstream side of the air flow that passes through the radiator 12 with respect to the radiator 12, and sucks the air that has passed through the radiator 12 and blows it out to the rear of the vehicle. It should be noted that the radiator 12 is indicated by a two-dot chain line only in FIG.

  The blower 10 shown in FIG. 1 includes an axial flow type fan 14, a fan shroud 16, an electric motor (not shown) that rotationally drives the fan 14, and a register 17. For example, the electric motor is fixed to the fan shroud 16 by a stay, that is, a support member.

  The fan 14 rotates around the fan axis CLf, and sucks air from one side in the fan axial direction DRa (see FIG. 3), that is, one side in the axial direction. The fan axial direction DRa is the axial direction of the fan shaft center CLf. As shown in FIG. 1, the fan 14 includes a motor mounting portion 18 connected so as to rotate integrally with a rotating shaft of the electric motor, a plurality of blades 20 extending radially from the motor mounting portion 18, and an outer peripheral ring 22. I have. The fan 14 is rotated around the fan axis CLf by the electric motor, and thereby ventilates the radiator 12. The fan shaft center CLf is parallel to the longitudinal direction of the vehicle, for example.

  The plurality of blades 20 are arranged around the fan axis CLf and are formed to extend radially from the motor mounting portion 18. Each of the plurality of blades 20 has a wing shape.

  The outer peripheral ring 22 is provided on the outer peripheral portion of the fan 14. Specifically, the outer peripheral ring 22 connects the outer peripheral ends 20a, which are the tips of the blades 20, to each other in the circumferential direction, and is formed in an annular shape around the fan axis CLf.

  The fan shroud 16 is fixed and connected to the radiator 12 (see FIG. 3) by, for example, bolting. The fan shroud 16 guides the air that has passed through the radiator 12 to the fan 14. The fan shroud 16 is formed by, for example, injection molding or the like, and is made of a resin such as polypropylene. Two fans 14 are attached to the fan shroud 16 in FIG. 1, but the blower 10 in FIG. 1 is illustrated with the right fan 14 in FIG. 1 not attached.

  As shown in FIGS. 1 and 2, the fan shroud 16 includes a fan accommodating portion 161 and a duct portion 162. FIG. 2 is an enlarged view of the II portion of FIG. 1 and shows the fan shroud 16 alone.

  The fan accommodating portion 161 is a portion of the fan shroud 16 where the fan 14 is accommodated, and a fan accommodating hole 161a centering on the fan axis CLf is formed inside the fan accommodating portion 161. The cross section of the fan accommodating hole 161a orthogonal to the fan axis CLf is circular, and the fan 14 is accommodated in the fan accommodating hole 161a.

  The fan accommodating portion 161 has an accommodating hole convex portion 163. As shown in FIGS. 2 and 3, the housing hole convex portion 163 forms a radial gap, which is a gap in the fan radial direction DRr, between the outer ring 22 of the fan 14 and the inner side of the fan housing hole 161a. Projecting in the fan radial direction DRr. In other words, the accommodation hole convex portion 163 protrudes radially inward from the accommodation hole side surface 161c that forms the fan accommodation hole 161a. And the accommodation hole convex part 163 is formed so that it may extend in the circumferential direction around the fan shaft center CLf, that is, the fan circumferential direction. Accordingly, the housing hole convex portion 163 is formed in a substantially annular shape with the fan shaft center CLf as the center, and is disposed so as to surround the outer peripheral ring 22 with a radial clearance from the outer peripheral ring 22 of the fan 14. . 3 is a cross-sectional view taken along the line III-III in FIG. The fan radial direction DRr is the radial direction of the fan shaft center CLf (see FIG. 1).

  As shown in FIG. 3, the fan 14 has a ring flange 24. The ring flange 24 protrudes from the one end 221 on one axial side of the outer ring 22 in a hook shape to the outside in the fan radial direction DRr. The ring flange 24 is provided over the entire circumference of the outer ring 22 and has an annular shape. One side surface 241 on one side in the axial direction of the ring flange 24 is an end surface on one side in the axial direction of the fan 14. The fan 14 is disposed such that one side surface 241 of the ring flange 24 is located at the same position in the fan axial direction DRa with respect to the one end 161b on one axial side of the fan accommodating hole 161a.

  The housing hole convex portion 163 of the fan housing portion 161 has one end 163a on one side in the axial direction, and one end 163a of the housing hole convex portion 163 faces the other side in the axial direction opposite to the one side in the axial direction. A gap is formed in the fan axial direction DRa with respect to the other side surface 242 of the ring flange 24. Since air flows into the radiator 12 from one axial direction as indicated by the arrow FLin in FIG. 3, one axial direction may be referred to as the axial upstream side, and the other axial direction may be referred to as the axial downstream side. You may call it.

  The accommodating hole convex portion 163 has an inner peripheral surface 163b facing the inside in the fan radial direction DRr, and the outer peripheral ring 22 has an outer peripheral surface 222 facing the outside in the fan radial direction DRr. The inner peripheral surface 163b of the accommodating hole convex portion 163 forms a gap with respect to the outer peripheral surface 222 of the outer peripheral ring 22 and faces the outer peripheral surface 222 in the fan radial direction DRr.

  The duct portion 162 of the fan shroud 16 guides the air that has passed through the radiator 12 while converging to the one end 161b that is the air inlet of the fan housing hole 161a. For this purpose, the duct portion 162 has a duct air guide surface 162a. As shown in FIGS. 2 and 3, the duct air guide surface 162 a is formed so as to expand from the one end 161 b of the fan housing hole 161 a to the outside in the fan radial direction DRr. In other words, the duct air guide surface 162a is formed so as to extend from the one end 161d of the receiving hole side surface 161c to the outside in the fan radial direction DRr. Therefore, the inner peripheral end 162b of the duct air guide surface 162a in the fan radial direction DRr forms the periphery of the one end 161b of the fan accommodation hole 161a and coincides with the one end 161d of the accommodation hole side surface 161c. That is, in the fan axial direction DRa, the axial position of the inner peripheral end 162b of the duct air guide surface 162a is the axial position of one end 161b of the fan accommodation hole 161a, in other words, the axial position of one end 161d of the accommodation hole side surface 161c. Is the same. The duct air guide surface 162a is, for example, a flat surface facing one side in the axial direction or a conical surface slightly facing the inside of the fan radial direction DRr from one side in the axial direction.

  With this configuration, the air sucked into the fan 14 flows along the duct air guide surface 162a. That is, the duct air guide surface 162 a guides the air so that the air that passes through the radiator 12 and is sucked into the fan 14 converges and is sucked into the fan 14.

  The duct portion 162 is formed with a recessed space 162j that is recessed from the duct air guide surface 162a toward the other side in the axial direction at a part of the duct air guide surface 162a. The recessed space 162j is provided adjacent to the fan housing hole 161a. Specifically, the concave space 162j is arranged in line with the fan accommodation hole 161a, and is disposed outside the fan radial direction DRr with respect to the fan accommodation hole 161a. Therefore, the concave space 162j communicates with the fan housing hole 161a in the fan radial direction DRr.

  Further, as shown in FIG. 3, a register 17 is arranged in the concave space 162 j of the duct portion 162. The register 17 is a kind of a part to be energized, that is, an electric part, and is a part used for controlling the number of revolutions of an electric motor that rotationally drives the fan 14. For example, the register 17 is disposed in the recessed space 162j so as not to protrude from the duct air guide surface 162a.

  Moreover, the duct part 162 has the concave bottom face 162k which forms the bottom of the concave space 162j, and the partition wall 162d. The concave bottom surface 162k includes an extended portion 162e extending from a component portion of the duct air guide surface 162a, and a register that is fitted into a hole formed in the extended portion 162e and provided integrally with the extended portion 162e. And a support plate 162f. The register 17 is fixed and supported on the register support plate 162f.

  The partition wall 162d is a rib-like wall that protrudes to the one side in the axial direction with respect to the concave bottom surface 162k, and is disposed so as to partition between the concave space 162j and the fan housing hole 161a. That is, the partition wall 162d is provided at the boundary between the concave space 162j and the fan housing hole 161a.

  2 and 3, the height of the partition wall 162d in the fan axial direction DRa is lower than that of the fan housing hole 161a. More specifically, as shown in FIG. 3, the partition wall 162d has a wall height Hw from the base end 162g to the tip 162h of the partition wall 162d in the fan axial direction DRa from the base end 162g of the partition wall 162d to the fan housing hole. It is formed so as to be lower than the height Hop to one end 161b of 161a. Therefore, although the concave space 162j communicates with the fan housing hole 161a in the fan radial direction DRr, the communication range thereof is narrowed in the fan axial direction DRa by the partition wall 162d.

  As shown in FIGS. 2 and 3, the partition wall 162d is formed so as to be continuously connected to the housing hole convex portion 163 in the circumferential direction of the fan, and has an annular shape including the housing hole convex portion 163. It is provided so as to constitute a part. Specifically, the front end 162h of the partition wall 162d is continuous to the one end 163a so that the position of the front end 162h of the partition wall 162d is aligned with the position of the one end 163a of the receiving hole convex portion 163 in the fan axial direction DRa. It is provided so that it may continue. The fact that the position of the tip 162h of the partition wall 162d is aligned with the position of the one end 163a of the accommodating hole convex portion 163 includes not only that the positions are the same but also the substantially the same. is there. In the present embodiment, for example, the position of the tip 162h of the partition wall 162d in the fan axial direction DRa is the same as the position of the one end 163a of the receiving hole convex portion 163.

  The partition wall 162d has an inner peripheral surface 162i facing the inside of the fan radial direction DRr, and the inner peripheral surface 162i of the partition wall 162d is continuously connected to the inner peripheral surface 163b of the receiving hole convex portion 163. Is formed. That is, the inner peripheral surface 162 i of the partition wall 162 d constitutes a part of the cylindrical inner surface shape including the inner peripheral surface 163 b of the accommodation hole convex portion 163.

  As shown in FIG. 3, when the relationship between the partition wall 162d and the fan 14 is viewed, the partition wall 162d has a wall height Hw of the partition wall 162d from the base end 162g of the partition wall 162d. It is formed to be lower than the height Hrg in the fan axial direction DRa up to the end 221. Specifically, the partition wall 162 d is disposed on the other side in the axial direction with respect to the ring flange portion 24 of the fan 14. The leading end 162h of the partition wall 162d forms a gap in the fan axial direction DRa with respect to the other side surface 242 of the ring flange 24.

  In the blower 10 configured as described above, the air flowing out from the radiator 12 outside the fan radial direction DRr from the fan housing hole 161a of the fan shroud 16 is along the duct air guide surface 162a as indicated by an arrow FLa in FIG. To the fan 14. A part of the air flowing along the duct air guide surface 162a once flows into the concave space 162j of the duct portion 162 as indicated by an arrow FLb and then sucked into the fan 14. Then, the register 17 in the concave space 162j is air-cooled by the air flowing into the concave space 162j.

  As described above, according to the present embodiment, the partition wall 162d of the fan shroud 16 is formed such that the wall height Hw of the partition wall 162d is lower than the height Hop of the fan housing hole 161a. It arrange | positions so that between the recessed space 162j and the fan accommodating hole 161a which are arrange | positioned may be divided | segmented. Therefore, as compared with a configuration in which the partition wall 162d is not provided, it is possible to suppress air pressure fluctuation caused by air flowing into the concave space 162j when the fan is operated. And since the noise resulting from arrangement | positioning of the register | resistor 17 becomes so large that the pressure fluctuation of the air is large, the deteriorating noise 162 can be suppressed by the partition wall 162d suppressing the pressure fluctuation.

  The suppression of this noise deterioration will be described by comparing this embodiment with a comparative example in which no partition wall 162d is provided. In the present embodiment, a partition wall 162d is provided as shown in FIG. On the other hand, in the comparative example contrasted with the present embodiment, as shown in FIG. 5, the partition wall 162d is not provided, and when viewed from the fan radial direction DRr, the concave space 162j of the fan shroud 16 is The fan accommodating hole 161a is opened to a larger extent than in the embodiment. FIG. 5 is an IV arrow view of the fan shroud 16 viewed from the direction of arrow IV (see FIG. 2) in the comparative example, and corresponds to FIG. 4 and 5, the fan shroud 16 alone is displayed.

  The result of measuring the noise of the fan 14 in each of the present embodiment and the comparative example is shown in the graph of FIG. In the noise measurement, the noise of the fan 14 was measured by rotating the electric motor that rotates the fan 14 at a predetermined fixed number of rotations. As a result, as shown in FIG. 6, in the present embodiment, the sound intensity (level) at the fan primary frequency, which is the same frequency as the rotational speed of the fan 14, is smaller as shown by the arrow LV in the comparative example. It was.

  As shown in FIG. 6, in the present embodiment, the cooling air necessary for cooling the register 17 is secured, and the air pressure fluctuation during the operation of the fan 14, that is, the duct as shown by the arrow FLb (see FIG. 3). The pressure fluctuation caused by the air flow flowing into the concave space 162j of the portion 162 is suppressed by the partition wall 162d, thereby reducing the sound intensity at the fan primary frequency (see FIG. 6), that is, the fan primary frequency component of the fan noise. can do. In addition to the blower 10 of FIG. 1, it is easy to provide the partition wall 162d between the concave space 162j of the duct portion 162 and the fan accommodating hole 161a even in a general electric blower mounted with electrical components such as the register 17. Therefore, it is possible to obtain the same effect by providing the partition wall 162d even in a general electric blower.

  Further, the partition wall 162d of the fan shroud 16 is a wall that protrudes to one side in the axial direction with respect to the concave bottom surface 162k of the duct portion 162. For example, compared with the case where the fan shroud structure of Patent Document 1 is adopted. Thus, it is possible to suppress the complexity of the fan shroud structure. By suppressing the complexity of the fan shroud structure, for example, it is possible to avoid the complexity of a mold for injection molding the fan shroud 16 and to reduce the mold manufacturing cost. .

  Further, according to the present embodiment, the partition wall 162d is formed so as to be continuously connected to the housing hole convex portion 163 in the fan circumferential direction, so that air at the boundary between the partition wall 162d and the housing hole convex portion 163 is formed. It is possible to suppress the turbulence of the flow and to suppress the generation of noise due to the turbulence of the air flow.

  Further, according to the present embodiment, the front end 162h of the partition wall 162d is accommodated so that the position of the front end 162h is the same as the position of the one end 163a of the accommodation hole convex portion 163 in the fan axial direction DRa. It is provided so as to be continuously connected to one end 163 a of the hole protrusion 163. Also by this, it is possible to suppress the disturbance of the air flow at the boundary between the partition wall 162d and the accommodating hole convex portion 163, and to suppress the generation of noise due to the disturbance of the air flow.

  Further, according to the present embodiment, the inner peripheral surface 162 i of the partition wall 162 d is formed so as to be continuously connected to the inner peripheral surface 163 b of the accommodation hole convex portion 163. Also by this, it is possible to suppress the disturbance of the air flow at the boundary between the partition wall 162d and the accommodating hole convex portion 163, and to suppress the generation of noise due to the disturbance of the air flow.

(Other embodiments)
(1) In the above-described embodiment, the blower 10 is for circulating air through the radiator 12. However, the blower 10 allows air to flow through a heat exchanger other than the radiator 12, such as a condenser that condenses the refrigerant. There is no problem. Furthermore, the blower 10 may flow air to a device other than the heat exchanger.

  (2) In the above-described embodiment, the fan 14 is an axial flow fan. However, the fan type is not limited as long as it is a fan that sucks air from one side in the axial direction. For example, the fan 14 is a mixed flow fan. Also good.

  (3) In the above-described embodiment, the register 17 is disposed in the concave space 162j of the fan shroud 16. However, the component disposed in the concave space 162j is not particularly limited as long as it is an electrical component. Instead of 17, there is no problem even if electrical components for PWM control are arranged in the concave space 162 j. Further, the number of electrical components in the concave space 162j is not necessarily one, and a plurality of electrical components may be arranged in the concave space 162j.

  (4) In the above-described embodiment, the resistor 17 is disposed in the recessed space 162j in order to air-cool the resistor 17, but an electrical component that does not need to be air-cooled may be disposed in the recessed space 162j. .

  In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. Further, in the above-described embodiment, it is needless to say that elements constituting the embodiment are not necessarily indispensable except for the case where it is clearly indicated that the element is essential and the case where the element is clearly considered to be essential in principle. . Further, in the above embodiment, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is particularly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to a specific number except for cases. Further, in the above embodiment, when referring to the material, shape, positional relationship, etc. of the component, etc., unless otherwise specified and in principle limited to a specific material, shape, positional relationship, etc. The material, shape, positional relationship and the like are not limited.

14 Fan 16 Fan shroud 17 Resistor (electrical part)
161 Fan accommodating portion 161a Fan accommodating hole 162 Duct portion 162a Duct air guide surface 162d Separation wall 162j Concave space 162k Concave bottom

Claims (6)

A fan in which a fan housing hole (161a) that houses a fan (14) that sucks air from one side in the axial direction (DRa) of the fan shaft center by rotating about the fan shaft center (CLf) is formed. A receiving portion (161);
A duct air guide surface (162a) is formed so as to extend from the fan housing hole to the outside in the radial direction (DRr) of the fan shaft center and guides the air so that the air converges and is sucked into the fan. A duct portion (162) in which a recessed space (162j) in which an electrical component (17) is disposed is formed in a part of the duct wind guide surface and is recessed from the duct wind guide surface.
The concave space is provided adjacent to the fan receiving hole,
The duct portion protrudes toward the one side in the axial direction with respect to the concave bottom surface (162k) that forms the bottom of the concave space, and divides the concave space from the fan accommodating hole. And a partition wall (162d) disposed in
The partition wall has a wall height (Hw) from the base end (162g) to the tip (162h) of the partition wall in the axial direction that is on the one side in the axial direction of the fan housing hole from the base end of the partition wall. A fan shroud, wherein the fan shroud is formed to be lower than a height (Hop) to one end (161b). The fan housing portion protrudes in the radial direction toward the inside of the fan housing hole while forming a radial clearance with the fan, and a housing hole convex portion (163) extending in the circumferential direction around the fan shaft center Have
The fan shroud according to claim 1, wherein the partition wall is formed so as to be continuously connected to the convex portion of the accommodation hole in the circumferential direction. The accommodation hole convex portion has one end (163a) on one side in the axial direction,
The front end of the partition wall is continuously connected to one end of the housing hole convex portion so that the position of the front end of the partition wall is aligned with the position of one end of the housing hole convex portion in the axial direction. The fan shroud according to claim 2, wherein the fan shroud is provided on the fan shroud. The accommodating hole convex portion has an inner peripheral surface (163b) facing the inner side in the radial direction, and the partition wall also has an inner peripheral surface (162i) facing the inner side in the radial direction,
4. The fan shroud according to claim 2, wherein an inner circumferential surface of the partition wall is formed so as to be continuously connected to an inner circumferential surface of the housing hole convex portion. The fan has an axial flow type having a plurality of blades (20) arranged around the fan shaft center and an annular outer ring (22) for connecting outer peripheral ends (20a) of the plurality of blades to each other. A fan,
The partition wall is formed such that the wall height is lower than the axial height (Hrg) from the base end of the partition wall to one end (221) on one axial side of the outer peripheral ring. The fan shroud according to any one of claims 1 to 4, wherein the fan shroud is provided. The fan includes a plurality of blades (20) arranged around the fan axis, an annular outer ring (22) interconnecting outer peripheral ends (20a) of the plurality of blades, and the outer ring An axial flow fan having a ring flange (24) projecting in a hook shape from one end (221) on one axial side to the outside in the radial direction;
The said partition wall is arrange | positioned with respect to the said ring collar part in the other axial direction side opposite to the said axial direction one side in the said axial direction, The any one of Claim 2 thru | or 4 characterized by the above-mentioned. Fan shroud.

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