JP3022185B2 - fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan, and more particularly, to a fan in which a stacked state during transportation is stabilized.

[0002]

2. Description of the Related Art In general, when a fan is transported, as shown in FIG.
2. Transport vertically. Therefore, the vertically stacked state of the fans 52, 52, 52,... Then, the blades 5 of the upper and lower fans 52, 52
There is a problem that the blades 53 may collide with the blades 53 or the blades 53 may collide with the hub 54, and the fan 52 may be damaged or damaged.

Therefore, conventionally, in order to prevent the displacement during the transportation, a projection or a rib protruding in the radial direction is provided on the hub of the fan, and the hub of the fan above the fan is fitted to the projection or the rib. By doing so, the displacement of the vertical stacking state is prevented (Japanese Unexamined Patent Publication No. 3-156196).
No.).

[0004]

However, in the conventional fan, since the projections and ribs protrude radially outward from the hub, the projections and ribs disturb the flow of fluid during rotation. Reduce the flow area. Therefore, the above-described conventional fan has a problem that aerodynamic performance may be reduced and noise may be increased.

It is an object of the present invention to provide a fan which can prevent a vertical stacking state from being shifted during transportation without lowering aerodynamic performance or increasing noise.

[0006]

In order to achieve the above object, a fan according to the present invention has a substantially truncated cone or truncated pyramid-shaped hub portion and extends radially outward from the hub portion. In the fan including the plurality of blades, the hub portion includes an inclined portion extending radially outward from the axial front to the axial rear, and a radially inward portion from a circumferential end of the inclined portion. A bent portion, which is bent, is located behind the blade, and extends in a circumferential direction from the inclined portion, and extends substantially parallel to the axis of the hub portion from the axial front to the axial rear, and A straight portion connected to the bent portion at a certain angle in the circumferential direction and an engagement portion at the rear end in the axial direction of a portion where the bent portion and the straight portion are connected are fitted. The axial direction of the hub A recess formed in the front end, and the recess of the hub is configured such that when the engaging portion at the rear end in the axial direction of the hub of another fan is fitted into the recess, the blades of both hubs It is characterized in that it is provided at a circumferential position so as not to obstruct the superposition of the parts.

A fan according to a second aspect of the present invention is a fan including a substantially frustoconical or truncated pyramid-shaped hub portion and a plurality of blades extending radially outward from the hub portion. The portion includes an inclined portion extending radially outward from the front in the axial direction toward the rear in the axial direction, a bent portion bent radially inward from a circumferential end of the inclined portion, and a bent portion of the bent portion. A recess having a shape identical to that of the engaging portion at the circumferential end and the rear end in the axial direction can be fitted therein, and a recess formed at the front end in the axial direction of the hub portion. The blades of both hub parts are provided at circumferential positions so as not to hinder the superposition of both hub parts when the engaging part at the axial rear end of the hub part of another fan is fitted to It is characterized by.

According to a third aspect of the present invention, there is provided a fan comprising a substantially truncated cone or truncated pyramid-shaped hub portion and a plurality of blades extending radially outward from the hub portion. The part is located at the back of the blade and the inclined part extending radially outward from the front in the axial direction toward the rear in the axial direction, and is continuous from the inclined part in the circumferential direction,
And a straight portion extending from the front in the axial direction to the rear in the axial direction substantially parallel to the axis of the hub portion, and the same shape as the engaging portion at the circumferential end and the axial rear end of the straight portion. And a recess formed at the front end in the axial direction of the hub portion. The recess is provided in the recess at the rear end in the axial direction of the hub portion of another fan. The blades of both hub portions are provided at circumferential positions so as not to hinder the superposition of the hub portions when they are fitted.

[0009]

In the fan according to the first aspect of the present invention, when the fan is vertically stacked, the fan is axially rearwardly inserted into a recess formed at the front end portion of the hub in the axial direction. The end engagement portions can be fitted. Therefore, it is possible to prevent the vertical stacking state from being broken during transportation due to the fitting of the engagement portion and the recessed portion.

On the other hand, since the bent portion and the straight portion are located radially inward of the inclined portion of the hub portion, the bent portion and the straight portion do not disturb the flow of fluid during rotation, and There is no reduction in the channel area. Therefore, a decrease in aerodynamic performance and an increase in noise during rotation are not caused.

Therefore, according to the fan of the present invention,
Without inducing aerodynamic performance or increasing noise during rotation,
It is possible to prevent the state of vertical stacking during transportation from being collapsed, and to prevent damage to the fan and damage to the fan.

According to the first aspect of the present invention, since the straight portion is located behind the blade, the straight portion serves as a die-cut portion during molding. In other words, according to the present invention, the straight portion can also serve as a die-cutting portion necessary for molding extending parallel to the axis.

According to the first aspect of the present invention, since both the bent portion and the straight portion are provided, the bent portion and the straight portion serve to reinforce the hub portion. Therefore, according to the invention of claim 1, the mechanical strength of the hub portion can be improved.

In the fan according to the second aspect of the present invention, when the fan is vertically stacked, the shaft of the hub portion of another fan vertically stacked on the recess formed at the axial front end of the hub. The engagement portion at the rear end in the direction can be fitted. Therefore, it is possible to prevent the vertical stacking state from being broken during transportation due to the engagement between the engagement portion and the recessed portion.

On the other hand, since the bent portion is located radially inward of the inclined portion of the hub portion, the bent portion does not disturb the flow of the fluid during rotation and reduces the flow path area. There is no. Therefore, a decrease in aerodynamic performance and an increase in noise are not caused.

Therefore, according to the fan of the present invention,
Without inducing aerodynamic performance or increasing noise during rotation,
It is possible to prevent the state of vertical stacking during transportation from being broken, and to prevent damage to the fan and damage to the fan.

Further, the invention according to claim 3 is characterized in that, when vertically stacked, a recess formed at an axial front end portion of the hub portion is axially rearwardly mounted on the hub portion of another fan vertically stacked thereon. The end engagement portions can be fitted. Therefore, it is possible to prevent the vertical stacking state from being broken during transportation due to the engagement between the engagement portion and the recessed portion.

On the other hand, since the straight portion is located radially inward of the inclined portion of the hub portion, the straight portion does not disturb the flow of the fluid during rotation and reduces the flow path area. There is no. Therefore, a decrease in aerodynamic performance and an increase in noise are not caused.

Therefore, according to the fan of the present invention, it is possible to prevent the state of vertical stacking during transportation from being collapsed without causing a decrease in aerodynamic performance and an increase in noise during rotation, and to damage and damage the fan. Can be prevented.

According to the third aspect of the present invention, since the straight portion is located behind the blade, the straight portion can also serve as a die-cutting portion required for molding.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1A shows an embodiment of the fan of the present invention as viewed obliquely from the rear, and FIG. 1B shows a state of the above embodiment viewed obliquely from the front. FIG. 2 shows the embodiment as viewed from behind, and FIG. 3 shows the embodiment as viewed from the side.

As shown in FIG. 1, FIG. 2, and FIG. 3, in the above embodiment, a hub portion 1 and four blades 2, 2, 2, 2, 3 extending radially outward from the hub portion 1 are provided. 2 is provided. The hub portion 1 has a substantially truncated pyramid shape.

The hub 1 has an axial front end 3, four inclined parts 5, 5, 5, 5 and four bent parts 6, 6, 6,.
6 and four straight portions 7,7,7,7. The inclined portion 5, the bent portion 6, and the straight portion 7
Extends from the front end 3 in the axial direction toward the rear in the axial direction.

As shown in FIG. 4A, which is a sectional view taken along the line AA in FIG. 2, the inclined portion 5 extends radially outward from the front in the axial direction to the rear in the axial direction. As shown in (B), they are arranged at substantially equal pitches in the circumferential direction, and form a part of a conical shape with the axis of the hub 1 as a central axis. Further, the bent portion 6 is provided with the inclined portion 5.
Are connected in the circumferential direction from the circumferential end of the
Is bent inward in the radial direction. The straight portion 7 is located rearward in the axial direction of the blade 2, is continuous in the circumferential direction from the circumferential end of the bent portion 6, and extends from the front in the axial direction to the rear in the axial direction. Extend substantially in parallel to the axis of. The straight portion 7 is curved so as to project radially outward.

An axially rear end of a portion 11 where the bent portion 6 and the straight portion 7 are connected forms an engaging portion 11a.

As shown in FIG. 1B, four recesses 10 are formed on the front surface of the front end 3. The four axial recesses 10 are recessed so that an object having the same shape as the axial rear end portion 11a of the corner portion 11 where the bent portion 6 and the straight portion 7 meet can be fitted. The recess 10
Is formed at a circumferential position substantially the same as the circumferential position of the engaging portion 11a.

A cylindrical portion 8 is provided inside the hub portion 1, and a front end of the cylindrical portion 8 is connected to the axial front end portion 3. A plurality of ribs 12a and 12b extend radially from the column portion 8. Rib 1
2a is connected to a corner 11 where the bent portion 6 and the straight portion 7 meet, and a rib 12b is connected to a corner 14 where the straight portion 7 and the inclined portion 5 meet.

In the fan having the above configuration, when the blades 2 rotate in the rotation direction shown in FIG. 2, an airflow is generated from below to above in FIG. This air flow collides with a heat exchanger (not shown) to cool the refrigerant. At this time,
Since the straight portion 7 and the bent portion 6 of the hub portion 1 of the fan are located radially inward of the inclined portion 5, they do not obstruct the air flow and have a flow area of the air flow. Do not decrease.

On the other hand, at the time of vertical stacking during transportation, the engaging portion 11a at the rear end in the axial direction of the corner portion 11 where the straight portion 7 and the bent portion 6 of the hub portion 1 are connected in the circumferential direction.
However, since the same fan can be fitted into the recess 10 of the front end 3 of the same fan, it is possible to prevent the vertically stacked state during transportation from being broken. Therefore, it is possible to prevent the fan from being damaged during transportation, and to prevent damage to the fan.

Therefore, according to the fan of this embodiment, it is possible to prevent the state of vertical stacking during transportation from being collapsed without causing a reduction in aerodynamic performance and an increase in noise during rotation, and to prevent the fan from being damaged. And damage to the fan.

The straight portion 7 constituting the radially inwardly constricted portion is located axially rearward of the blade 2. That is, the straight portion 7 constitutes a portion parallel to the axial direction for die-cutting required when the hub portion 1 is die-formed. That is, according to this embodiment,
The straight part 7 can also serve as a die-cutting part necessary for molding extending parallel to the axis.

Further, in this embodiment, both the bent portion 6 and the straight portion 7 are provided, and since the bent portion 6 and the straight portion 7 are constricted radially inward, the mechanical strength of the hub portion is reduced. Can be improved.

In the above embodiment, the hub portion 1 has both the bent portion 6 and the straight portion 7. However, the hub portion 1 has only one of the bent portion 6 and the straight portion 7, and the other portion is cut off. It may be. Further, in the above embodiment, the radially inwardly constricted portion of the hub portion 1 is constituted by the bent portion 6 and the straight portion 7, but the radially inwardly constricted portion is formed by the inclined portion 5. May also be constituted by three or more portions located radially inward.

Further, in the above embodiment, the bent portion and the inclined portion are each provided with a substantially frustoconical hub portion which is curved outward in the radial direction, but the bent portion and the inclined portion are non-curved and flat pyramids. A trapezoidal hub may be provided.

In the above embodiment, the blade 2, the inclined portion 5,
Although four bent portions 6, straight portions 7, and four axial recess portions 10 were provided, the blades, inclined portions, bent portions,
Any number of straight portions and axial recesses may be provided.

In the above embodiment, the recess 10 is provided at a circumferential position corresponding to the circumferential position of the corner portion 11. However, when the fans are vertically stacked, the blades of the hub portion are vertically stacked. The concave portion may be provided at any circumferential position as long as it does not cause an obstacle.

[0038]

As is apparent from the above description, the fan according to the first aspect of the present invention has a substantially truncated cone or truncated pyramid shaped hub portion.
An inclined portion extending radially outward from the front in the axial direction toward the rear in the axial direction, a bent portion bent radially inward from a circumferential end of the inclined portion, and a rear portion of the blade. And extending in the circumferential direction from the inclined portion and extending substantially in parallel with the axis of the hub portion from the front in the axial direction to the rear in the axial direction, and connected to the bent portion at a certain angle in the circumferential direction. A straight portion that has the same shape as the engagement portion at the rear end in the axial direction of the portion where the bent portion and the straight portion are connected can be fitted, and formed at the front end portion in the axial direction of the hub portion. A recessed portion, wherein when the engaging portion at the axial rear end of the hub portion of another fan is fitted into this recessed portion, the blades of both hub portions overlap each other. It is provided at a position in the circumferential direction so as not to obstruct the device.

Therefore, according to the first aspect of the present invention, when vertically stacked, the shaft of the hub portion of another fan vertically stacked on the recess formed at the axial front end of the hub portion. The engagement portion at the rear end in the direction can be fitted. Therefore, it is possible to prevent the vertical stacking state from being broken during transportation due to the fitting between the engagement portion and the depression.

On the other hand, since the bent portion and the straight portion are located radially inward of the inclined portion of the hub portion, the bent portion and the straight portion do not disturb the flow of fluid during rotation, and There is no reduction in the channel area. Therefore, a decrease in aerodynamic performance and an increase in noise are not caused.

Therefore, according to the fan of the present invention,
Without inducing aerodynamic performance or increasing noise during rotation,
The vertical stacking state during transportation can be prevented from shifting, and the fan can be prevented from being damaged and the fan from being damaged.

According to the first aspect of the present invention, since the straight portion is located behind the blade, the straight portion serves as a die-cut portion during molding. In other words, according to the present invention, the straight portion can also serve as a die-cutting portion necessary for molding extending parallel to the axis.

According to the first aspect of the present invention, since both the bent portion and the straight portion are provided, the bent portion and the straight portion serve to reinforce the hub portion. Therefore, according to the invention of claim 1, the mechanical strength of the hub portion can be improved.

According to a second aspect of the present invention, the substantially truncated conical or truncated pyramid-shaped hub portion is the same as the engaging portion at the circumferential end and the axial rear end of the inclined portion, the bent portion, and the bent portion. And a recess formed at an axial front end of the hub portion. The recess is engaged with an axial rear end of a hub portion of another fan. When the parts are fitted, the blades of the two hub parts are provided at circumferential positions so as not to hinder the superposition of the two hub parts.

Therefore, according to the second aspect of the present invention, when vertically stacked, the shaft of the hub portion of another fan vertically stacked on the recess formed at the axial front end of the hub portion. The engagement portion at the rear end in the direction can be fitted. Therefore, it is possible to prevent the vertical stacking state from being broken during transportation due to the engagement between the engagement portion and the recessed portion.

On the other hand, since the bent portion is located radially inward of the inclined portion of the hub portion, the bent portion does not disturb the flow of fluid during rotation and reduces the flow path area. There is no. Therefore, a decrease in aerodynamic performance and an increase in noise are not caused.

Therefore, according to the fan of the second aspect of the present invention, it is possible to prevent the state of vertical stacking during transportation from being disrupted without lowering aerodynamic performance and increasing noise during rotation.
Damage to the fan and damage to the fan can be prevented.

According to a third aspect of the present invention, a substantially truncated cone or truncated pyramid-shaped hub portion is located behind the inclined portion and the blade, is connected to the inclined portion in the circumferential direction, and is axially arranged from the front in the axial direction. The straight portion extending substantially parallel to the axis of the hub portion toward the rear direction, the same shape as the engaging portion at the circumferential end and the axial rear end of the straight portion can be fitted, A recess formed at the front end in the axial direction of the hub, wherein the recess is formed by fitting an engagement portion at the rear end in the axial direction of the hub of another fan into the recess. The blades of the hub are provided at circumferential positions so as not to hinder the superposition of the hubs.

Therefore, according to the third aspect of the present invention, when vertically stacked, the shaft of the hub portion of another fan vertically stacked on the recess formed at the axial front end of the hub portion. The engagement portion at the rear end in the direction can be fitted. Therefore, it is possible to prevent the vertically stacked state from being broken during transportation.

On the other hand, since the straight portion is located radially inward of the inclined portion of the hub portion, the straight portion does not disturb the flow of the fluid during rotation and reduces the flow path area. There is no. Therefore, a decrease in aerodynamic performance and an increase in noise are not caused.

Therefore, according to the fan of the present invention,
Without inducing aerodynamic performance or increasing noise during rotation,
It is possible to prevent the state of vertical stacking during transportation from being broken, and to prevent damage to the fan and damage to the fan.

According to the third aspect of the present invention, since the straight portion is located behind the blade, the straight portion can also serve as a die-cutting portion required for molding.

[Brief description of the drawings]

FIG. 1A is a diagram showing an embodiment of a fan according to the present invention as viewed obliquely from behind, and FIG. 1B is a diagram showing an embodiment of the fan as viewed obliquely from front. is there.

FIG. 2 is a rear view showing the embodiment as viewed from the rear in the axial direction.

FIG. 3 is a side view showing a state in which the embodiment is viewed from a side.

FIG. 4A is a cross-sectional view of the hub portion of the embodiment, and FIG. 4B is a plan view showing the hub portion viewed from the front in the axial direction.

FIG. 5 is a schematic diagram showing a state where a plurality of vertically stacked fans are housed in a returnable box.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hub part, 2 ... Blade, 3 ... Front end part, 5 ... Inclined part, 6 ...
Bent part, 7: straight part, 10: dent part, 1
1, 13, 14 ... corner portion, 11a ... engagement portion, 12a, 12b
…rib.

Claims (3)

(57) [Claims] 1. A substantially truncated cone or truncated pyramid shaped hub portion,
In a fan including a plurality of blades extending radially outward from the hub, the hub includes an inclined portion extending radially outward from an axial front to an axial rear. A bent portion that is bent radially inward from a circumferential end of the inclined portion, and is located behind the blade, and extends in the circumferential direction from the inclined portion, and from the axial front to the axial rear. A straight portion that extends substantially parallel to the axis of the hub portion and that is connected to the bent portion at a certain angle in the circumferential direction; and an axis of a portion where the bent portion and the straight portion are connected. An engaging portion at the rear end in the direction can be fitted with the same shape, and a concave portion formed at the axial front end portion of the hub portion; and the concave portion is a hub of another fan in the concave portion. When the engaging part at the axial rear end of the part is fitted A fan characterized in that the blades of both hub portions are provided at circumferential positions so as not to hinder the overlapping of the hub portions. 2. A substantially truncated cone or truncated pyramid shaped hub portion,
In a fan including a plurality of blades extending radially outward from the hub, the hub includes an inclined portion extending radially outward from an axial front to an axial rear. A bent portion that is bent radially inward from a circumferential end of the inclined portion, an object having the same shape as a circumferential end of the bent portion and an engagement portion at an axial rear end can be fitted, and the hub can be fitted. A recess formed at the front end in the axial direction of the fan portion, wherein the recess is formed when the engagement portion at the rear end in the axial direction of the hub of another fan is fitted into the recess. Wherein the blades are provided at circumferential positions so as not to obstruct the superposition of the hub portions. 3. A substantially truncated cone or truncated pyramid shaped hub portion,
In a fan including a plurality of blades extending radially outward from the hub, the hub includes an inclined portion extending radially outward from an axial front to an axial rear. A straight portion which is located behind the blade, and which extends in the circumferential direction from the inclined portion, and which extends from the front in the axial direction to the rear in the axial direction substantially parallel to the axis of the hub portion; A recess having a shape identical to that of the engagement portion at the circumferential end and the rear end in the axial direction of the hub can be fitted, and a recess formed at the front end in the axial direction of the hub portion. When the engaging portion at the axial rear end of the hub of another fan is fitted into the recess, the blades of both hubs are provided at circumferential positions so as not to hinder the superposition of the hubs. Fan.