Fan

Abstract

A fan of the present invention has a shroud of which an outer area in the radial direction has a curved shape that is recessed toward the upper side in the axial direction, wherein the upper surface of the outer area in the radial direction of the shroud includes a clip groove that is recessed toward the lower side in the axial direction. The clip can include: a first portion; a second portion facing the first portion; a third portion for connecting the first portion and the second portion; and an inclined part, which is cut from the first portion and bent toward the second portion such that the end thereof comes into contact with the clip groove.

Description

Pan

[0001] The present invention relates to a fan having a clip that can reduce vibration generated when the fan rotates.

[0002] In general, fans are used as a means to push air by the rotational force of a rotor, and are widely applied to refrigerators, air conditioners, vacuum cleaners, etc.

[0003] In particular, fans are classified into axial fans, sirocco fans, turbo fans, etc. depending on the method of intake and discharge of air or its shape.

[0004] Among these, the turbofan draws in air from the axial direction of the fan and discharges it radially between the blades, that is, through the side of the fan. Since the air naturally flows into the inside of the fan and is discharged to the outside, a duct is not required, and it can be used in relatively large-capacity AHUs (Air Handling Units).

[0005] Conventionally, a fan comprises a shroud, a hub, and a plurality of blades spaced circumferentially between the shroud and the hub. In this case, the shroud, the hub, and the plurality of blades are each formed from a metal material and joined by welding or the like. Welding metal components has been problematic in that it increases the defect rate, increases weight, and increases material costs.

[0006] Additionally, there was a problem with vibration occurring during fan rotation due to product tolerances or errors occurring during welding.

[0007] The present invention provides a fan capable of reducing vibrations that occur during rotation of the fan due to product tolerances or errors that occur during welding.

[0008] The present invention provides a fan capable of preventing a clip from being detached from the fan due to centrifugal force generated when the fan rotates.

[0009] The present invention provides a fan capable of improving space efficiency.

[0010] The present invention provides a fan that is easy to manufacture a mold for injection molding.

[0011] The present invention provides a fan that is easy to maintain because the clip can be easily separated from the fan.

[0012] According to one aspect of the present invention for achieving the above object, a fan includes a hub, a shroud facing the hub, a plurality of blades arranged between the hub and the shroud and spaced apart in a circumferential direction, and a clip coupled to a radially outer region of the shroud.

[0013] In this case, the radially outer region of the shroud has a concave curved shape toward the axial upper side, and the upper surface of the radially outer region of the shroud includes a clip groove formed to be concave toward the axial lower side, and the clip may include a first portion, a second portion facing the first portion, a third portion connecting the first portion and the second portion, and an inclined portion cut from the first portion and bent toward the second portion so that an end thereof contacts the clip groove.

[0014] This can reduce vibrations that occur when the fan rotates due to product tolerances or errors that occur during welding.

[0015] Additionally, the clip can be prevented from being detached from the fan by centrifugal force generated when the fan rotates.

[0016] Additionally, the inclined portion may include two inclined portions formed on each of the horizontal sides of the first portion.

[0017] In this case, the inclined portion may include a first inclined portion that is connected to the first portion and bent to form an obtuse angle with the first portion, and a second inclined portion that is connected to the first inclined portion and bent to form an obtuse angle with the first inclined portion.

[0018] This can improve space efficiency.

[0019] In addition, the clip groove includes a first inclined surface extending axially downward from the upper surface of the radially outer region of the shroud, a second inclined surface extending radially outward from the upper surface of the radially outer region of the shroud, and a third inclined surface connecting the first inclined surface and the second inclined surface, and an end of the second inclined portion of the clip can contact the first inclined surface.

[0020] Additionally, the angle formed by the first inclined surface and the third inclined surface may be an obtuse angle, and the angle formed by the second inclined surface and the third inclined surface may be an obtuse angle.

[0021] Additionally, the second inclined portion of the clip may face the second inclined surface and the third inclined surface while being spaced apart from the second inclined surface and the third inclined surface.

[0022] This makes it easy to manufacture a mold for injection molding the fan.

[0023] Additionally, the clip includes a bend portion that is bent axially upward at an end of the first portion, and a region connecting the bend portion and the first portion can contact the upper surface of the radially outer region of the shroud.

[0024] This allows for easy fan maintenance as the clip can be easily detached from the fan.

[0025] According to one aspect of the present invention for achieving the above object, a fan includes a hub, a shroud facing the hub, a plurality of blades arranged between the hub and the shroud and spaced apart in a circumferential direction, and a clip coupled to a radially outer region of the hub.

[0026] In this case, the radially outer region of the hub has a concave curved shape toward the axially downward side, and the lower surface of the radially outer region of the hub includes a clip groove formed to be concave toward the axially upward side, and the clip may include a first portion, a second portion facing the first portion, a third portion connecting the first portion and the second portion, and an inclined portion cut from the first portion and bent toward the second portion so that an end thereof contacts the clip groove.

[0027] This can reduce vibrations that occur when the fan rotates due to product tolerances or errors that occur during welding.

[0028] Additionally, the clip can be prevented from being detached from the fan by centrifugal force generated when the fan rotates.

[0029] Additionally, the inclined portion may include two inclined portions formed on each of the horizontal sides of the first portion.

[0030] In this case, the inclined portion may include a first inclined portion that is connected to the first portion and bent to form an obtuse angle with the first portion, and a second inclined portion that is connected to the first inclined portion and bent to form an obtuse angle with the first inclined portion.

[0031] This can improve space efficiency.

[0032] In addition, the clip groove includes a fourth inclined surface extending axially upward from the lower surface of the radially outer region of the hub, a fifth inclined surface extending radially outward from the lower surface of the radially outer region of the hub, and a sixth inclined surface connecting the fourth inclined surface and the fifth inclined surface, and an end of the second inclined portion of the clip can contact the fourth inclined surface.

[0033] Additionally, the angle formed by the fourth slope and the sixth slope may be an obtuse angle, and the angle formed by the fifth slope and the sixth slope may be an obtuse angle.

[0034] Additionally, the second inclined portion of the clip may be spaced apart from the fifth inclined surface and the sixth inclined surface, and may face the fifth inclined surface and the sixth inclined surface.

[0035] This makes it easy to manufacture a mold for injection molding the fan.

[0036] Additionally, the clip includes a bend portion that is bent axially downward at an end of the first portion, and a region connecting the bend portion and the first portion can contact the lower surface of the radially outer region of the shroud.

[0037] This allows for easy fan maintenance as the clip can be easily detached from the fan.

[0038] According to one aspect of the present invention for achieving the above object, a fan includes a hub, a shroud facing the hub, a plurality of blades arranged between the hub and the shroud and spaced apart in a circumferential direction, and a clip coupled to a radially outer region of the shroud.

[0039] In this case, the radially outer region of the shroud has a concave curved shape toward the axial upper side, and the upper surface of the radially outer region of the shroud is formed to be convex toward the axial upper side and includes a first clip protrusion and a second clip protrusion that are spaced apart from each other, and the clip may include a first portion that contacts the second clip protrusion, a second portion that faces the first portion, a third portion that connects the first portion and the second portion, and an inclined portion that is cut from the first portion and bent toward the second portion so that an end contacts the first clip protrusion.

[0040] In addition, the first clip protrusion includes a first region extending axially upward from the upper surface of the radially outer region of the shroud, and a second region forming a predetermined angle with the first region, and the inclined portion is caught in the first region, and a region connecting the first portion and the third portion can be in contact with the second region.

[0041] This can reduce vibrations that occur when the fan rotates due to product tolerances or errors that occur during welding.

[0042] Additionally, the clip can be prevented from being detached from the fan by centrifugal force generated when the fan rotates.

[0043] In addition, the inclined portion includes a first inclined portion that is connected to the first portion and is bent to form an obtuse angle with the first portion, and a second inclined portion that is connected to the first inclined portion and is bent to form an obtuse angle with the first inclined portion, wherein the first inclined portion faces the upper surface of the radially outer region of the shroud, and an end of the second inclined portion can be caught on the first region.

[0044] In addition, the second clip protrusion includes a third region extending axially upward from the upper surface of the radially outer region of the shroud, a fourth region extending radially inward from the upper surface of the radially outer region of the shroud, and a fifth region connecting the third region and the fourth region, wherein a region of the first portion of the clip that is farther from the third portion can contact the fifth region.

[0045] This makes it easy to manufacture a mold for injection molding the fan.

[0046] According to one aspect of the present invention for achieving the above object, a fan includes a hub, a shroud facing the hub, a plurality of blades arranged between the hub and the shroud and spaced apart in a circumferential direction, and a clip coupled to a radially outer region of the hub.

[0047] In this case, the radially outer region of the hub has a concave curved shape toward the axial downward side, and the lower surface of the radially outer region of the hub is formed to be convex toward the axial downward side and includes a third clip protrusion and a fourth clip protrusion that are spaced apart from each other, and the clip may include a first portion that contacts the fourth clip protrusion, a second portion that faces the first portion, a third portion that connects the first portion and the second portion, and an inclined portion that is cut from the first portion and bent toward the second portion so that an end contacts the third clip protrusion.

[0048] In addition, the third clip protrusion includes a sixth region extending axially downward from the lower surface of the radially outer region of the hub, and a seventh region forming a predetermined angle with the sixth region, and the inclined portion is caught in the sixth region, and the region connecting the first portion and the third portion can be in contact with the seventh region.

[0049] This can reduce vibrations that occur when the fan rotates due to product tolerances or errors that occur during welding.

[0050] Additionally, the clip can be prevented from being detached from the fan by centrifugal force generated when the fan rotates.

[0051] In addition, this makes it easy to manufacture a mold for injection molding the fan.

[0052] The present invention provides a fan capable of reducing vibrations that occur during fan rotation due to product tolerances or errors that occur during welding.

[0053] In addition, the present invention can provide a fan that can prevent a clip from being detached from the fan due to centrifugal force generated when the fan rotates.

[0054] Additionally, the present invention can provide a fan that can improve space efficiency.

[0055] In addition, the present invention can provide a fan that is easy to manufacture a mold for injection molding.

[0056] In addition, the present invention provides a fan that is easy to maintain because the clip can be easily separated from the fan.

[0057] Figure 1 is a perspective view of a fan according to one embodiment of the present invention.

[0058] Figure 2 is an enlarged view of part A of Figure 1.

[0059] Figure 3 is a cross-sectional view of Figure 2.

[0060] Figure 4 is a drawing of Figure 3 with the clip removed.

[0061] Figure 5 is a perspective view of a clip according to one embodiment of the present invention.

[0062] Figure 6 is a side view of a clip according to one embodiment of the present invention.

[0063] FIG. 7 is a cross-sectional view of a fan hub according to one embodiment of the present invention.

[0064] FIG. 8 is a cross-sectional view of a fan shroud and clip according to another embodiment of the present invention.

[0065] FIG. 9 is a cross-sectional view of a fan shroud according to another embodiment of the present invention.

[0066] FIG. 10 is a cross-sectional view of a fan hub according to another embodiment of the present invention.

[0067] Hereinafter, embodiments disclosed in the present invention will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components are given the same reference numbers and redundant descriptions thereof will be omitted.

[0068] When describing embodiments disclosed in the present invention, it should be understood that when a component is referred to as being "connected" or "connected" to another component, it may be directly connected or connected to that other component, but there may also be other components present in between.

[0069] In addition, when describing the embodiments disclosed in the present invention, if it is determined that a detailed description of related known technology may obscure the gist of the embodiments disclosed in the present invention, the detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in the present invention, and the technical ideas disclosed in the present invention are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention.

[0070] FIG. 1 is a perspective view of a fan according to one embodiment of the present invention. FIG. 2 is an enlarged view of portion A of FIG. 1. FIG. 3 is a cross-sectional view of FIG. 2. FIG. 4 is a view of FIG. 3 with the clip removed. FIG. 5 is a perspective view of a clip according to one embodiment of the present invention. FIG. 6 is a side view of a clip according to one embodiment of the present invention. FIG. 7 is a cross-sectional view of a hub of a fan according to one embodiment of the present invention.

[0071] Referring to FIGS. 1 to 7, a fan (10) according to one embodiment of the present invention may include a shroud (100), a hub (200), a blade (300), and a clip (400), but may be implemented without some of these configurations, and does not exclude additional configurations.

[0072] The fan (10) may be a large fan used in a large-capacity air handling unit (AHU). The fan (10) may rotate in one direction or the other with respect to the rotation axis (O). When the fan (10) rotates, air flowing in from the upper side (upper side with respect to FIG. 1) may be discharged radially between the blades (300), i.e., through the side surface (horizontal direction with respect to FIG. 1) of the fan (10).

[0073] The fan (10) can be formed from a high-strength plastic material. The fan (10) can be integrally injection-molded. This eliminates the need for additional processes such as welding, unlike when the fan (10) is formed from metal, thereby reducing the defect rate and improving productivity. Furthermore, its light weight facilitates transportation and reduces costs.

[0074] The shroud (100) may face the hub (200). The shroud (100) may be placed on top of the hub (200). The shroud (100) may be formed in a circular shape with an open center. The open center portion of the shroud (100) may be defined as an inlet hole through which air is introduced.

[0075] The radially inner end of the shroud (100) adjacent to the above-mentioned inlet hole may be positioned axially upward as it goes radially inward. The radially inner region of the shroud (100) adjacent to the above-mentioned inlet hole may have a concave curved shape toward the axial upper side. The inner end of the radially inner region of the shroud (100) may be positioned axially further upward than the outer end of the radially outer region (120). Through this, air can be easily introduced into the fan (10) from the upper side of the fan (10).

[0076] In the present invention, the axial upper side may be defined as the upward direction with reference to Fig. 1, and the axial lower side may be defined as the downward direction with reference to Fig. 1.

[0077] In the present invention, the radially inner region of the shroud (100) may be defined as meaning the radially inner peripheral region of the shroud (100), and the radially outer region of the shroud (100) may be defined as meaning the radially outer peripheral region of the shroud (100).

[0078] The radially outer region (120) of the shroud (100) that is far from the inlet hole may have a concave curved shape toward the axial upper side. The radially outer region (120) of the shroud (100) may be arranged axially upward as it goes radially outward.

[0079] The connecting region (110) connecting the radially inner region and the radially outer region (120) of the shroud (100) can be formed in a flat shape. The connecting region (110) of the shroud (100) can extend in the circumferential direction.

[0080] The upper surface (122) of the radially outer region (120) of the shroud (100) may face or contact the first portion (410) of the clip (400). The upper surface (122) of the radially outer region (120) of the shroud (100) may include a first clip groove (130) that is formed to be concave toward the axial downward side. The first clip groove (130) may be formed along the circumferential direction.

[0081] The first clip groove (130) may include a first inclined surface (132) extending axially downward from an upper surface (122) of a radially outer region (120) of the shroud (100), a second inclined surface (134) extending radially outward from an upper surface (122) of a radially outer region (120) of the shroud (100), and a third inclined surface (136) connecting the first inclined surface (132) and the second inclined surface (134). The first inclined surface (132) may contact an end (446) of the second inclined portion (444) of the clip (400). The angle formed by the first inclined surface (132) and the third inclined surface (136) may be an obtuse angle. The obtuse angle formed by the first inclined surface (132) and the third inclined surface (136) may be 0° or more and 170° or less. The angle formed by the third inclined surface (136) and the second inclined surface (134) may be an obtuse angle. The angle formed by the first inclined surface (132) and the rotation axis (O) may be 0° or more and 10° or less. The second inclined surface (134) and the third inclined surface (136) of the first clip groove (130) may be spaced apart from and face the second inclined portion (444) of the clip (400). Through this, it is easy to manufacture a mold forming the first clip groove (130) when injection-molding the fan (10).

[0082] The lower surface (124) of the radially outer region (120) of the shroud (100) may face or contact the second portion (420) of the clip (400). The region connecting the upper surface (122) and the lower surface (124) of the radially outer region (120) of the shroud (100) may face or contact the third portion (430) of the clip (400).

[0083] The hub (200) may face the shroud (100). The hub (200) may be positioned beneath the shroud (100). The hub (200) may be formed in a circular shape with an open center. Alternatively, the hub (200) may be formed in a circular shape with a closed center.

[0084] The radially outer region (220) of the hub (200) may have a concave curved shape toward the axially downward side. The radially outer region (220) of the hub (200) may be arranged axially downward as it goes radially outward.

[0085] The connecting region (210) connecting the radially inner region and the radially outer region (220) of the hub (200) may be formed in a flat shape. The connecting region (210) of the hub (200) may extend in the circumferential direction.

[0086] The lower surface (222) of the radially outer region (220) of the hub (200) may face or contact the first portion (410) of the clip (400). The lower surface (222) of the radially outer region (220) of the hub (200) may include a second clip groove (230) that is formed to be concave toward the axially upper side. The second clip groove (230) may extend in the circumferential direction.

[0087] The second clip groove (230) may include a fourth inclined surface (232) extending axially upward from a lower surface (222) of a radially outer region (220) of the hub (200), a fifth inclined surface (234) extending radially outward from a lower surface (222) of a radially outer region (220) of the hub (200), and a sixth inclined surface (238) connecting the fourth inclined surface (232) and the fifth inclined surface (234). The fourth inclined surface (232) may contact an end (446) of the second inclined portion (444) of the clip (400). The angle formed by the fourth inclined surface (232) and the sixth inclined surface (236) may be an obtuse angle. The obtuse angle formed by the fourth inclined surface (232) and the sixth inclined surface (236) may be 0° or more and 170° or less. The angle formed by the fifth inclined surface (234) and the sixth inclined surface (236) may be an obtuse angle. The angle formed by the fourth inclined surface (232) and the rotation axis (O) may be 0° or more and 10° or less. The fifth inclined surface (234) and the sixth inclined surface (236) of the second clip groove (230) may be spaced apart from and face the second inclined portion (444) of the clip (400). Through this, it is easy to manufacture a mold forming the second clip groove (230) when injection-molding the fan (10).

[0088] The upper surface (224) of the radially outer region (220) of the hub (200) may face or contact the second portion (420) of the clip (400). The region connecting the upper surface (224) and the lower surface (222) of the radially outer region (220) of the hub (200) may face or contact the third portion (430) of the clip (400).

[0089] The blade (300) may be placed between the shroud (100) and the hub (200). The blade (300) may contact the lower surface of the shroud (100) and the upper surface of the hub (200). The blade (300) may include a plurality of blades (300) spaced apart in the circumferential direction. In one embodiment of the present invention, the number of the plurality of blades (300) is described as five as an example, but is not limited thereto and the number of the plurality of blades (300) may be changed in various ways.

[0090] The clip (400) can be coupled to the radially outer region (120) of the shroud (100) and / or the radially outer region (220) of the hub (200). This can reduce vibrations that occur during rotation of the fan (10) due to tolerances that occur during the manufacturing of the fan (10).

[0091] The clip (400) may include a first portion (410), a second portion (420) facing the first portion (410), a third portion (430) connecting the first portion (410) and the second portion (420), and an inclined portion (440) that is cut from the first portion (410) and bent toward the second portion (420) so that the end contacts the first clip groove (130) or the second clip groove (230). Through this, the clip (400) can be prevented from being detached from the fan (10) due to centrifugal force generated when the fan (10) rotates.

[0092] The inclined portion (440) may include two inclined portions (440) formed on both horizontal sides or on both circumferential sides of the first portion (410). The inclined portion (440) may include a first inclined portion (442) connected to the first portion (410) and bent to form an obtuse angle with the first portion (410), and a second inclined portion (444) connected to the first inclined portion (442) and bent to form an obtuse angle with the first inclined portion (442). The obtuse angle between the first portion (410) and the first inclined portion (442) may be 90° or more and 170° or less. The obtuse angle between the first inclined portion (442) and the second inclined portion (444) may be 90° or more and 170° or less. The end (446) of the second inclined portion (444) can contact the first inclined surface (132) of the first clip groove (130) and / or the fourth inclined surface (232) of the second clip groove (230). The second inclined portion (444) of the clip (400) can be spaced apart from and facing the second inclined surface (134) and the third inclined surface (136) of the first clip groove (130). The second inclined portion (444) of the clip (400) can be spaced apart from and facing the fifth inclined surface (234) and the sixth inclined surface (236) of the second clip groove (230). This can improve space efficiency.

[0093] The clip (400) may include a bend portion (450) that is bent axially upward from an end of the first portion (410). The bend portion (450) does not contact an upper surface (122) of a radially outer region (120) of the shroud (100), and an area connecting the bend portion (450) and the first portion (410) may contact an upper surface (122) of a radially outer region (120) of the shroud (100). The bend portion (450) does not contact a lower surface (222) of a radially outer region (220) of the hub (200), and an area connecting the bend portion (450) and the first portion (410) may contact a lower surface (222) of a radially outer region (220) of the hub (200). Through this, the clip (400) can be easily separated from the fan (10), making maintenance of the fan (10) easy.

[0094] According to one embodiment of the present invention, a fan (10) may have a clip (400) coupled to at least one of a radially outer region (120) of a shroud (100) and a radially outer region (220) of a hub (200). This allows the overall balance of the fan (10) to be maintained, thereby reducing noise generated when the fan (10) rotates. In addition, detachment of the clip (400) may be prevented when the fan (10) rotates.

[0095] Fig. 8 is a cross-sectional view of a fan shroud and clip according to another embodiment of the present invention. Fig. 9 is a cross-sectional view of a fan shroud according to another embodiment of the present invention. Fig. 10 is a cross-sectional view of a fan hub according to another embodiment of the present invention.

[0096] Referring to FIGS. 8 to 10, a fan (10) according to another embodiment of the present invention may include a shroud (100), a hub (200), a blade (300), and a clip (400), but may be implemented excluding some of these configurations and does not exclude additional configurations.

[0097] Except for the shape of the upper surface (122) of the radially outer region (120) of the shroud (100) of the fan (10) according to another embodiment of the present invention and the shape of the lower surface (222) of the radially outer region (220) of the hub (200), it can be understood that the detailed configuration of the fan (10) according to one embodiment of the present invention is the same.

[0098] The upper surface (122) of the radially outer region (120) of the shroud (100) may include a first clip protrusion (140) and a second clip protrusion (150) that are formed to be convex toward the axial upper side and are spaced apart from each other. The distance between the first clip protrusion (140) and the second clip protrusion (150) may be 5 mm to 30 mm.

[0099] The first portion (410) of the clip (400) can contact the second clip protrusion (150), and the end (446) of the inclined portion (440) can contact the first clip protrusion (140). That is, the first portion (410) of the clip (400) can contact the second clip protrusion (150), and the end (446) of the inclined portion (440) of the clip (400) can be caught on the first clip protrusion (140), thereby maintaining the coupling between the clip (400) and the radially outer region (120) of the shroud (100).

[0100] The first clip protrusion (140) may include a first region (142) extending axially upward from an upper surface (122) of a radially outer region (120) of the shroud (100), and a second region (144) forming a predetermined angle with the first region (142). The second region (144) may be connected to a curved region (123) connecting the upper surface (122) and the lower surface (124) of the radially outer region (120) of the shroud (100).

[0101] In this case, the first inclined portion (442) of the clip (400) faces the upper surface (122) of the radially outer region (120) of the shroud (100), the inclined portion (440) of the clip (400) is caught in the first region (142), and the region connecting the first portion (410) and the third portion (430) of the clip (400) can be in contact with the second region (144).

[0102] The second clip protrusion (150) may include a third region (152) extending axially upward from the upper surface (122) of the radially outer region (120) of the shroud (100), a fourth region (154) extending radially inward from the upper surface (122) of the radially outer region (120) of the shroud (100), and a fifth region (156) connecting the third region (152) and the fourth region (154). The angle formed by the third region (152) and the rotational axis (O) may be 0° or more and 30° or less. In this case, a region of the first region (410) of the clip (400) that is farther from the third region (430) may come into contact with the fifth region (156). This makes it easy to manufacture a mold when injection molding the fan (10).

[0103] The lower surface (222) of the radially outer region (220) of the hub (200) may include a third clip protrusion (240) and a fourth clip protrusion (250) that are formed convexly toward the axial downward side and are spaced apart from each other. The distance between the third clip protrusion (240) and the fourth clip protrusion (250) may be 5 mm to 30 mm.

[0104] The first portion (410) of the clip (400) can contact the fourth clip protrusion (250), and the end (446) of the inclined portion (440) can contact the third clip protrusion (240). That is, the first portion (410) of the clip (400) can contact the fourth clip protrusion (250), and the end (446) of the inclined portion (440) of the clip (400) can be caught on the third clip protrusion (240), thereby maintaining the coupling between the clip (400) and the radially outer region (220) of the hub (200).

[0105] The third clip protrusion (240) may include a sixth region (242) extending axially downward from the lower surface (222) of the radially outer region (220) of the hub (200), and a seventh region (244) forming a predetermined angle with the sixth region (242). The seventh region (244) may be connected to a curved region (223) connecting the lower surface (222) and the upper surface (224) of the radially outer region (220) of the hub (200).

[0106] In this case, the first inclined portion (442) of the clip (400) faces the lower surface (222) of the radially outer region (220) of the hub (200), the inclined portion (440) of the clip (400) is caught on the sixth region (242), and the region connecting the first portion (410) and the third portion (430) of the clip (400) can be in contact with the seventh region (244).

[0107] The fourth clip protrusion (250) may include an eighth region (252) extending axially downward from a lower surface (222) of a radially outer region (220) of the hub (200), a ninth region (254) extending radially inward from a lower surface (222) of the radially outer region (220) of the hub (200), and a tenth region (256) connecting the eighth region (252) and the ninth region (254). The angle formed by the eighth region (252) and the rotational axis (O) may be 0° or more and 30° or less. In this case, a region of the first region (410) of the clip (400) that is farther from the third region (430) may come into contact with the tenth region (256). This makes it easy to manufacture a mold when injection molding the fan (10).

[0108] According to a fan (10) according to another embodiment of the present invention, the compression force between the upper surface (122) of the radially outer region (120) of the shroud (100) and the clip (400) can be improved through the second clip protrusion (150), and the clip (400) can be prevented from being separated from the shroud (100) when the fan (10) rotates through the first clip protrusion (140).

[0109] In addition, the compressive force between the lower surface (222) of the radially outer region (220) of the hub (200) and the clip (400) can be improved through the fourth clip protrusion (250), and the clip (400) can be prevented from being detached from the hub (200) when the fan (10) rotates through the third clip protrusion (240).

[0110] The embodiments or other embodiments of the present invention described above are not mutually exclusive or distinct. The embodiments or other embodiments of the present invention described above may each have their respective components or functions combined or used together.

[0111] For example, it means that a configuration A described in a particular embodiment and / or drawing can be combined with a configuration B described in another embodiment and / or drawing. That is, even if a combination between configurations is not directly described, it means that a combination is possible, except in cases where a combination is described as impossible.

[0112] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. Herb; A shroud facing the above hub; a plurality of blades arranged between the hub and the shroud and spaced apart in the circumferential direction; and A clip is included that is coupled to the radially outer region of the shroud, The radially outer region of the above shroud has a concave curved shape toward the axial upper side, The upper surface of the radially outer region of the shroud includes a clip groove formed concavely toward the axial downward side, A fan including a clip having a first portion, a second portion facing the first portion, a third portion connecting the first portion and the second portion, and an inclined portion cut from the first portion and bent toward the second portion so that the end contacts the clip groove.

2. In paragraph 1, A fan including two inclined portions formed on each of the horizontal sides of the first portion.

3. In paragraph 1, A fan including a first inclined portion connected to the first portion and bent to form an obtuse angle with the first portion, and a second inclined portion connected to the first inclined portion and bent to form an obtuse angle with the first inclined portion.

4. In paragraph 3, The clip groove includes a first inclined surface extending axially downward from the upper surface of the radially outer region of the shroud, a second inclined surface extending radially outward from the upper surface of the radially outer region of the shroud, and a third inclined surface connecting the first inclined surface and the second inclined surface. A fan in which the end of the second inclined portion of the above clip is in contact with the first inclined surface.

5. In paragraph 4, A fan in which the angle formed by the first inclined surface and the third inclined surface is an obtuse angle, and the angle formed by the second inclined surface and the third inclined surface is an obtuse angle.

6. In paragraph 4, The second inclined portion of the clip is spaced apart from the second inclined surface and the third inclined surface, and faces the second inclined surface and the third inclined surface.

7. In paragraph 1, The above clip includes a bending portion that is bent axially upward at the end of the first portion, A fan in which the area connecting the above-mentioned bending portion and the above-mentioned first portion is in contact with the upper surface of the above-mentioned radially outer area of ​​the above-mentioned shroud.

8. Herbs; A shroud facing the above hub; a plurality of blades arranged between the hub and the shroud and spaced apart in the circumferential direction; and Including a clip coupled to the radially outer region of the above hub, The radially outer region of the above hub has a concave curved shape toward the axial downward side, The lower surface of the radially outer region of the above hub includes a clip groove formed concavely toward the axial upper side, A fan including a clip having a first portion, a second portion facing the first portion, a third portion connecting the first portion and the second portion, and an inclined portion cut from the first portion and bent toward the second portion so that the end contacts the clip groove.

9. In paragraph 8, A fan including two inclined portions formed on each of the horizontal sides of the first portion.

10. In paragraph 8, A fan including a first inclined portion connected to the first portion and bent to form an obtuse angle with the first portion, and a second inclined portion connected to the first inclined portion and bent to form an obtuse angle with the first inclined portion.

11. In paragraph 10, The clip groove includes a fourth inclined surface extending axially upward from the lower surface of the radially outer region of the hub, a fifth inclined surface extending radially outward from the lower surface of the radially outer region of the hub, and a sixth inclined surface connecting the fourth inclined surface and the fifth inclined surface. A fan in which the end of the second inclined portion of the above clip is in contact with the fourth inclined surface.

12. In paragraph 11, A fan in which the angle formed by the fourth slope and the sixth slope is an obtuse angle, and the angle formed by the fifth slope and the sixth slope is an obtuse angle.

13. In paragraph 11, The second inclined portion of the clip is spaced apart from the fifth inclined surface and the sixth inclined surface, and faces the fifth inclined surface and the sixth inclined surface.

14. In paragraph 8, The above clip includes a bending portion that is bent axially downward at the end of the first portion, A fan in which the area connecting the above-mentioned bending portion and the above-mentioned first portion is in contact with the lower surface of the above-mentioned radially outer area of ​​the above-mentioned shroud.

15. Herbs; A shroud facing the above hub; a plurality of blades arranged between the hub and the shroud and spaced apart in the circumferential direction; and A clip is included that is coupled to the radially outer region of the shroud, The radially outer region of the above shroud has a concave curved shape toward the axial upper side, The upper surface of the radially outer region of the shroud is formed to be convex toward the axial upper side and includes a first clip protrusion and a second clip protrusion spaced apart from each other, A fan in which the clip includes a first portion that contacts the second clip protrusion, a second portion that faces the first portion, a third portion that connects the first portion and the second portion, and an inclined portion that is cut from the first portion and bent toward the second portion so that the end contacts the first clip protrusion.

16. In paragraph 15, The first clip protrusion includes a first region extending axially upward from the upper surface of the radially outer region of the shroud, and a second region forming a predetermined angle with the first region, A fan in which the above-mentioned inclined portion is caught in the first region, and the region connecting the first portion and the third portion is in contact with the second region.

17. In paragraph 16, The above-mentioned inclined portion includes a first inclined portion that is connected to the first portion and is bent to form an obtuse angle with the first portion, and a second inclined portion that is connected to the first inclined portion and is bent to form an obtuse angle with the first inclined portion. A fan in which the first inclined portion faces the upper surface of the radially outer region of the shroud, and the end of the second inclined portion is caught in the first region.

18. In paragraph 15, The second clip protrusion includes a third region extending axially upward from the upper surface of the radially outer region of the shroud, a fourth region extending radially inward from the upper surface of the radially outer region of the shroud, and a fifth region connecting the third region and the fourth region. A fan in which an area of ​​the first portion of the clip that is far from the third portion comes into contact with the fifth portion.

19. Herbs; A shroud facing the above hub; a plurality of blades arranged between the hub and the shroud and spaced apart in the circumferential direction; and Including a clip coupled to the radially outer region of the above hub, The radially outer region of the above hub has a concave curved shape toward the axial downward side, The lower surface of the radially outer region of the above hub is formed convexly toward the axial downward side and includes a third clip protrusion and a fourth clip protrusion spaced apart from each other, A fan in which the clip includes a first portion that contacts the fourth clip protrusion, a second portion that faces the first portion, a third portion that connects the first portion and the second portion, and an inclined portion that is cut from the first portion and bent toward the second portion so that the end contacts the third clip protrusion.

20. In paragraph 19, The third clip protrusion includes a sixth region extending axially downward from the lower surface of the radially outer region of the hub, and a seventh region forming a predetermined angle with the sixth region, A fan in which the above-mentioned inclined portion is caught in the sixth region, and the region connecting the first portion and the third portion is in contact with the seventh region.

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