Air blower

Abstract

To reduce noise generated by a plurality of swirling flow suppression parts 26b.SOLUTION: A plurality of swirling flow suppression parts 26b each suppress revolution of air swirling flow caused by rotation of a blower fan 201, and guide swirling flow so as to flow to the other side in a fan axial direction DRa. The plurality of swirling flow suppression parts 26b respectively is formed into a backward tilted shape that goes the other side of the fan axial direction DRa as advancing from an inner side in a radial direction Kc1 with a fan axis CL1 as a center to an outer side in the radial direction Kc1. Therefore, a wind speed of swirling flow on the outer side in the radial direction Kc1 becomes slower compared to swirling flow on the inner side in the radial direction Kc1 when colliding with the plurality of swirling flow suppression parts 26b.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a blower device. [Background technology]

[0002] Conventionally, some blower devices include a blower fan arranged in an air passage inside an air conditioning case, and a swirling flow suppression section that allows the air flow blown out from the blower fan to pass through the air passage (see, for example, Patent Document 1).

[0003] The blower fan rotates about its axis, drawing in air from one side in the axial direction and blowing it outward in the radial direction about the axis.

[0004] The swirl flow suppression portion is disposed on the other axial side of the blower fan and constitutes an air passage through which air blown out from the blower fan passes to the other axial side. The swirl flow suppression portion suppresses the flow of a swirl flow generated by the rotation of the blower fan.

[0005] This makes it possible to prevent unevenness in the volume of air blown out due to swirling currents caused by the rotation of the blower fan, and therefore it becomes unnecessary to excessively restrict the arrangement of the air outlets in order to prevent unevenness in the volume of air blown out. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6747469 Summary of the Invention [Problem to be solved by the invention]

[0007] The swirl flow suppression section of the blower device in Patent Document 1 suppresses the swirl flow of the airflow blown out from the blower fan. However, the high-speed swirl flow blown out from the blower fan collides with the swirl flow suppression section, and this collision generates noise.

[0008] Furthermore, when a cover portion that blocks the blower fan from the other axial side is provided on the other axial side of the swirling flow suppression portion, the air passage is provided radially outward from the cover portion.

[0009] In this case, the cross-sectional area of ​​the air flow path is smaller than the cross-sectional area of ​​the air flow path in the air conditioning case on the downstream side of the swirling flow suppression portion.

[0010] Here, when the direction in which the main stream of air flows in the air flow passage is defined as the main stream direction, the flow passage cross section of the air flow passage is a cross section obtained by cutting the air flow passage along an imaginary plane perpendicular to the main stream direction.

[0011] Therefore, air flows at high speed from the air passage with a small cross-sectional area of ​​the swirl flow suppression portion to the other side in the axial direction, causing a large pressure loss and generating noise.

[0012] In view of the above, an object of the present invention is to provide a blower device that reduces noise. [Means for solving the problem]

[0013] In order to achieve the above object, the present invention provides a blower device, comprising: an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in air from one side in the axial direction and blow the air outward in a radial direction about the axis, where the direction in which the axis (CL1) extends is defined as an axial direction (DRa); a cover portion (26a) that is disposed on the other axial side of the air passage with respect to the blower fan and is formed so as to cover the other axial side of the blower fan, and that forms, between itself and the inner wall, a passage (130) through which air blown out from the blower fan flows to the other axial side; at least one swirl flow suppressing portion (26b) that is disposed in the passage and formed in the radial direction to suppress a swirl flow of air generated by rotation of the blower fan and generate an air flow that flows to the other side in the axial direction; One axial end portion (270) of at least one swirling flow suppression portion is formed so as to approach the other axial end portion as it progresses from the radial inner side to the radial outer side.

[0014] According to the invention recited in claim 1, the wind speed when the swirling flow collides with the swirling flow suppression portion is slower than when the swirling flow suppression portion is formed so as to extend from the radially inner side to the radially outer side, thereby making it possible to reduce noise generated when the swirling flow collides with the swirling flow suppression portion. As a result, it is possible to provide a blower device that reduces noise.

[0015] In the invention described in claim 2, there is provided a blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in air from one side in the axial direction and blow the air outward in a radial direction about the axis, where the direction in which the axis (CL1) extends is defined as an axial direction (DRa); a cover portion (26a) that is disposed on the other axial side of the air passage with respect to the blower fan and is formed so as to cover the other axial side of the blower fan, and that forms, between itself and the inner wall, a passage (130) through which air blown out from the blower fan flows to the other axial side; at least one swirl flow suppressing portion (26b) that is disposed in the passage and formed in the radial direction to suppress a swirl flow of air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; One axial end portion (270) of at least one swirling flow suppression portion is formed so as to approach one axial side as it progresses from the radial inner side to the radial outer side.

[0016] According to the invention recited in claim 2, the swirling flow suppression portion generates an air flow that flows at a higher speed from the inside to the outside in the radial direction.

[0017] Furthermore, according to the invention described in claim 2, the difference between the wind speed of the air on the radially inner side and the wind speed of the air on the radially outer side can be made larger in the wind speed distribution of the air flow that has passed through the swirling flow suppression portion, compared to when the swirling flow suppression portion is formed to extend from the radially inner side to the outer side.

[0018] As a result, an air flow can be generated on the air flow downstream side of the swirl flow suppression section, flowing from the radial outside of the passage toward the radial center side centered on the axis, thereby reducing the amount of air flowing from the passage to the other side in the axial direction.

[0019] Therefore, it is possible to reduce noise generated when air flows through the passageway. As a result, it is possible to provide a blower device that reduces noise.

[0020] In the invention described in claim 4, there is provided a blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side in a rotation direction (Ka1) about the axis (CL1) so as to draw in air from one side in the axial direction and blow it out radially outward about the axis (DRa); a cover portion (26a) that is disposed on the other axial side of the air passage with respect to the blower fan and is formed so as to cover the other axial side of the blower fan, and that forms, between itself and the inner wall, a passage (130) through which air blown out from the blower fan flows to the other axial side; at least one swirl flow suppressing portion (26b) that is disposed in the passage and formed in the radial direction to suppress a swirl flow of air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; The other end (270A) in the rotational direction of the at least one swirl flow suppression portion is formed so as to move toward one side in the rotational direction (Ka1) of the blower fan as it progresses from the radial inner side to the radial outer side.

[0021] According to the invention described in claim 4, the wind speed when the swirling flow collides with the swirling flow suppression portion is slower than when the swirling flow suppression portion is formed so as to extend from the radially inner side to the radially outer side. This makes it possible to reduce noise generated when the swirling flow collides with the swirling flow suppression portion. As a result, it is possible to provide a blower device that reduces noise.

[0022] In the invention described in claim 5, there is provided a blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side in a rotation direction (Ka1) about the axis (CL1) so as to draw in air from one side in the axial direction and blow it out radially outward about the axis (DRa); a cover portion (26a) that is disposed on the other axial side of the air passage with respect to the blower fan and is formed so as to cover the other axial side of the blower fan, and that forms, between itself and the inner wall, a passage (130) through which air blown out from the blower fan flows to the other axial side; at least one swirl flow suppressing portion (26b) that is disposed in the passage and formed in the radial direction to suppress a swirl flow of air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; The other end portion (270A) in the rotational direction of the at least one swirling flow suppression portion is formed so as to approach the other side in the rotational direction as it progresses from the radial inner side to the radial outer side.

[0023] According to the invention recited in claim 5, the swirling flow suppression portion generates an air flow that flows faster from the radial inside to the radial outside. Furthermore, according to the invention recited in claim 5, it is possible to increase the difference between the wind speed of the air on the radial inside and the wind speed of the air on the radial outside in the wind speed distribution of the air flow that has passed through the swirling flow suppression portion, compared to a case in which the swirling flow suppression portion is formed so as to extend from the radial inside to the radial outside.

[0024] As a result, an air flow can be generated on the air flow downstream side of the swirl flow suppression section, flowing from the radial outside of the passage toward the radial center side centered on the axis, thereby reducing the amount of air flowing from the passage to the other side in the axial direction.

[0025] Therefore, it is possible to reduce noise generated when air flows through the passageway. As a result, it is possible to provide a blower device that reduces noise.

[0026] In the invention described in claim 7, there is provided a blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in air from one side in the axial direction and blow the air outward in a radial direction about the axis, where the direction in which the axis (CL1) extends is defined as an axial direction (DRa); a cover portion (26a) that is disposed on the other axial side of the air passage with respect to the blower fan and is formed so as to cover the other axial side of the blower fan, and that forms, between itself and the inner wall, a passage (130) through which air blown out from the blower fan flows to the other axial side; at least one swirl flow suppressing portion (26b) that is disposed in the passage and formed in the radial direction to suppress a swirl flow of air generated by rotation of the blower fan and generate an air flow that flows to the other side in the axial direction; At least one swirl flow suppression portion has a dimension (dDa) in the rotation direction (Ka1) of the blower fan that increases from the radially inner side toward the radially outer side.

[0027] Therefore, according to the invention described in claim 7, the amount of air passing through the radially outer side of the passage is reduced compared to when the swirling flow suppression portion has a constant rotational dimension throughout the radial direction.

[0028] As a result, it is possible to reduce noise that occurs when air collides with the radially outer side of the swirl flow suppression portion, and therefore to reduce noise that occurs when air flows through the passage. As a result, it is possible to provide a blower device that reduces noise.

[0029] In the invention described in claim 8, there is provided a blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in air from one side in the axial direction and blow the air outward in a radial direction about the axis, where the direction in which the axis (CL1) extends is defined as an axial direction (DRa); a cover portion (26a) that is disposed on the other axial side of the air passage with respect to the blower fan and is formed so as to cover the other axial side of the blower fan, and that forms, between itself and the inner wall, a passage (130) through which air blown out from the blower fan flows to the other axial side; at least one swirl flow suppressing portion (26b) that is disposed in the passage and formed in the radial direction to suppress a swirl flow of air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; At least one swirl flow suppression portion has a dimension (dDa) in the rotation direction (Ka1) of the blower fan that decreases from the radially inner side toward the radially outer side.

[0030] According to the invention recited in claim 8, the swirling flow suppression portion generates an air flow that flows faster from the radially inner side to the radially outer side. Furthermore, according to the invention recited in claim 8, the pressure loss of the air passing through the passage decreases from the radially inner side to the radially outer side.

[0031] This makes it possible to increase the difference between the wind speed of the air on the radially inner side and the wind speed of the air on the radially outer side in the wind speed distribution of the air flow passing through the swirling flow suppression section, compared to when the swirling flow suppression section is formed extending from the radially inner side to the outer side.

[0032] As a result, an air flow can be generated on the air flow downstream side of the swirl flow suppression section, flowing from the radial outside of the passage toward the radial center side centered on the axis, thereby reducing the amount of air flowing from the passage to the other side in the axial direction.

[0033] Therefore, it is possible to reduce noise generated when air flows through the passageway. As a result, it is possible to provide a blower device that reduces noise.

[0034] In the invention described in claim 14, there is provided a blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side in a rotation direction (Ka1) about the axis (CL1) so as to draw in air from one side in the axial direction and blow it out radially outward about the axis (DRa); a cover portion (26a) that is disposed on the other axial side of the air passage with respect to the blower fan and is formed so as to cover the other axial side of the blower fan, and that forms, between itself and the inner wall, a passage (130) through which air blown out from the blower fan flows to the other axial side; at least one swirl flow suppressing portion (26b) that is disposed in the passage and formed in the radial direction to suppress a swirl flow of air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; the other end (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward the other side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, Furthermore, one axial end portion (270) of at least one swirling flow suppression portion is formed so as to move toward one axial side as it progresses from the radial inner side to the radial outer side.

[0035] Therefore, according to the invention as recited in claim 14, at least one swirling flow suppression portion is formed so as to move toward the other side in the rotation direction as it moves from the radially inner side to the radially outer side. Therefore, similar to the invention as recited in claim 5, the swirling flow suppression portion can reduce noise generated when air flows through the passage.

[0036] Furthermore, according to the invention described in claim 14, at least one swirling flow suppression portion is formed so as to move toward one side in the axial direction as it moves from the radially inner side to the radially outer side. Therefore, similar to the invention described in claim 2, it is possible to reduce noise generated when air flows through the passage. As described above, it is possible to provide a blower device that reduces noise.

[0037] In the invention described in claim 15, there is provided a blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side in a rotation direction (Ka1) about the axis (CL1) so as to draw in air from one side in the axial direction and blow it out radially outward about the axis (DRa); a cover portion (26a) that is disposed on the other axial side of the air passage with respect to the blower fan and is formed so as to cover the other axial side of the blower fan, and that forms, between itself and the inner wall, a passage (130) through which air blown out from the blower fan flows to the other axial side; at least one swirl flow suppressing portion (26b) that is disposed in the passage and formed in the radial direction to suppress a swirl flow of air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; the other end (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward one side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, Furthermore, one axial end portion (270) of at least one swirling flow suppression portion is formed so as to move toward one axial side as it progresses from the radial inner side to the radial outer side.

[0038] Therefore, according to the invention as recited in claim 15, at least one swirling flow suppression portion is formed so as to move toward one side in the rotation direction as it moves from the radially inner side to the radially outer side. Therefore, similar to the invention as recited in claim 5, it is possible to reduce noise generated when the swirling flow blown out from the blower fan collides with the swirling flow suppression portion.

[0039] Furthermore, according to the invention described in claim 15, at least one swirl flow suppression portion is formed so as to move toward one side in the axial direction as it moves from the radially inner side to the radially outer side. Therefore, similar to the invention described in claim 2, it is possible to reduce noise generated when air flows through the passage. As described above, it is possible to provide a blower device that reduces noise.

[0040] In the invention described in claim 16, there is provided a blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side in a rotation direction (Ka1) about the axis (CL1) so as to draw in air from one side in the axial direction and blow it out radially outward about the axis (DRa); a cover portion (26a) that is disposed on the other axial side of the air passage with respect to the blower fan and is formed so as to cover the other axial side of the blower fan, and that forms, between itself and the inner wall, a passage (130) through which air blown out from the blower fan flows to the other axial side; at least one swirl flow suppressing portion (26b) that is disposed in the passage and formed in the radial direction to suppress a swirl flow of air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; the other end (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward the other side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, One axial end portion (270) of at least one swirling flow suppression portion is formed so as to approach the other axial end portion as it progresses from the radial inner side to the radial outer side.

[0041] Therefore, according to the invention as recited in claim 16, at least one swirl flow suppression portion is formed so as to move toward the other side in the rotation direction as it moves from the radially inner side to the radially outer side. Therefore, similar to the invention as recited in claim 5, it is possible to reduce noise generated when air flows through the passage.

[0042] According to the invention of claim 16, at least one swirling flow suppression portion is formed so as to move toward the other side in the axial direction as it moves from the radially inner side to the radially outer side. Therefore, similar to the invention of claim 1, it is possible to reduce noise that occurs when the swirling flow blown out from the blower fan collides with the swirling flow suppression portion. As a result, it is possible to provide a blower device that reduces noise.

[0043] In the invention described in claim 17, there is provided a blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side in a rotation direction (Ka1) about the axis (CL1) so as to draw in air from one side in the axial direction and blow it out radially outward about the axis (DRa); a cover portion (26a) that is disposed on the other axial side of the air passage with respect to the blower fan and is formed so as to cover the other axial side of the blower fan, and that forms, between itself and the inner wall, a passage (130) through which air blown out from the blower fan flows to the other axial side; at least one swirl flow suppressing portion (26b) that is disposed in the passage and formed in the radial direction to suppress a swirl flow of air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; the other end (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward one side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, One axial end portion (270) of at least one swirling flow suppression portion is formed so as to approach the other axial end portion as it progresses from the radial inner side to the radial outer side.

[0044] Therefore, according to the invention as recited in claim 17, at least one swirl flow suppression portion is formed so as to move toward one side in the rotation direction as it moves from the radially inner side to the radially outer side. Therefore, similar to the invention as recited in claim 4, it is possible to reduce noise generated when the swirl flow blown out from the blower fan collides with the swirl flow suppression portion.

[0045] Furthermore, according to the invention described in claim 17, at least one swirling flow suppression portion is formed so as to move toward the other side in the axial direction as it progresses from the radially inner side to the radially outer side.

[0046] Therefore, as with the invention recited in claim 1, it is possible to reduce noise that occurs when the swirling flow blown out from the blower fan collides with the swirling flow suppression portion. As a result, it is possible to provide a blower device that reduces noise.

[0047] The reference symbols in parentheses attached to each component indicate an example of the correspondence between the component and specific components described in the embodiments described below. [Brief description of the drawings]

[0048] [Figure 1] FIG. 2 is a diagram showing a cross-sectional configuration of a vehicle air conditioning unit in the first embodiment, cut along an imaginary plane that is parallel to the vehicle vertical direction and includes a fan axis, and is a diagram to assist in explaining the positional relationship between an air conditioning case, a blower, and a straightening mechanism. [Diagram 2] 2 is a cross-sectional view taken along line II-II in FIG. 1, and is a diagram for assisting in the explanation of a plurality of swirling flow suppression portions and a cover portion that constitute the flow straightening mechanism in the first embodiment. FIG. [Diagram 3] FIG. 2 is a cross-sectional view of the blower fan and the straightening mechanism in the first embodiment of FIG. 1 cut along an imaginary plane including the fan axis, and is a diagram to assist in the explanation of the multiple swirling flow suppression sections and the cover section that constitute the straightening mechanism. [Figure 4] FIG. 2 is a diagram to assist in the explanation of the multiple swirling flow suppression portions that constitute the straightening mechanism in the first embodiment of FIG. 1, and shows the state in which the straightening mechanism is projected by a light source from one side in the axial direction. [Diagram 5] FIG. 11 is a cross-sectional view of a blower fan and a straightening mechanism in a second embodiment, taken along an imaginary plane including the fan axis, and is a diagram to assist in the explanation of a plurality of swirling flow suppression portions and a cover portion that constitute the straightening mechanism. [Figure 6] FIG. 11 is a cross-sectional view of a straightening mechanism in a third embodiment taken along a virtual plane perpendicular to the fan axis, and is a diagram to assist in the explanation of a plurality of swirling flow suppression portions and a cover portion, and corresponds to FIG. 2. [Figure 7] 7 is a cross-sectional view taken along line VII-VII in FIG. 6, and is a diagram for assisting in the explanation of the front guide portion and the rear guide portion that configure the swirling flow suppressing portion. FIG. [Figure 8] 8 is a cross-sectional view taken along line VIII-VIII in FIG. 6, and is a diagram for assisting in the explanation of the front guide portion and the rear guide portion that configure the swirling flow suppressing portion. FIG. [Figure 9] 9 is a cross-sectional view taken along line IX-IX in FIG. 6, and is a diagram for assisting in the explanation of the front guide portion and the rear guide portion that configure the swirling flow suppressing portion. FIG. [Figure 10]8 is a diagram for assisting in the explanation of the narrow angle formed between the end face and a virtual plane in FIG. 7. FIG. [Figure 11] 9 is a diagram for assisting in the explanation of the narrow angle formed between the end face and the imaginary plane in FIG. 8. FIG. [Figure 12] 10 is a diagram for assisting in the explanation of the narrow angle formed between the end face and the imaginary plane in FIG. 9. FIG. [Figure 13] FIG. 13 is a cross-sectional view of the straightening mechanism in a fourth embodiment, taken along an imaginary plane including the fan axis, for assisting in the description of a plurality of swirling flow suppression portions and a cover portion that configure the straightening mechanism. [Figure 14] 14 is a cross-sectional view taken along the line XIV-XIV in FIG. 13, and is a diagram for assisting in the explanation of the dimensions in the rotational direction of the swirling flow suppressing portion. FIG. [Figure 15] 15 is a cross-sectional view taken along the line XV-XV in FIG. 13, and is a diagram for assisting in the explanation of the dimensions in the rotational direction of the swirling flow suppressing portion. FIG. [Figure 16] 16 is a cross-sectional view taken along the line XVI-XVI in FIG. 13, and is a diagram for assisting in the explanation of the dimensions in the rotational direction of the swirling flow suppressing portion. FIG. [Figure 17] FIG. 13 is a cross-sectional view of the straightening mechanism in a fifth embodiment, taken along an imaginary plane including the fan axis, for assisting in the description of a plurality of swirling flow suppression portions and a cover portion that configure the straightening mechanism. [Figure 18] FIG. 13 is a cross-sectional view of the straightening mechanism in a sixth embodiment, taken along an imaginary plane including the fan axis, and is a diagram to assist in explaining the multiple swirl flow suppression portions, reinforcing ring, and cover portion that constitute the straightening mechanism. [Figure 19] This is a cross-sectional view of one of the swirling flow suppression sections that constitute the straightening mechanism in the seventh embodiment, cut along a virtual plane that is parallel to the rotational direction and parallel to the radial direction, and is a figure to assist in explaining the shape of the swirling flow suppression section. [Figure 20] FIG. 23 is a cross-sectional view of the flow straightening mechanism in the eighth embodiment, taken along an imaginary plane parallel to the fan axial direction and parallel to the radial direction, for assisting in the description of the shape of the swirling flow suppression portion. [Figure 21]FIG. 13 is a cross-sectional view of a part of the straightening mechanism in the eighth embodiment, cut by an imaginary plane including the fan axis, and is a view to assist in explaining the wind speed of the airflow that has passed through the swirling flow suppression portion, and the airflow that flows from the radial outside to the radial inside. [Figure 22] FIG. 23 is a cross-sectional view of a part of the straightening mechanism in a comparative example of the eighth embodiment, cut by a virtual plane including the fan axis, and is a view to assist in explaining the wind speed of the airflow that has passed through the swirling flow suppression portion, and the airflow that flows from the radial outside to the radial inside. [Diagram 23] FIG. 13 is a cross-sectional view of the straightening mechanism in the ninth embodiment, taken along an imaginary plane parallel to the fan axial direction and parallel to the radial direction, for assisting in the description of the shape of the swirling flow suppression portion. [Figure 24] FIG. 23 is a cross-sectional view of the straightening mechanism in a tenth embodiment, taken along an imaginary plane including the fan axis, and is a diagram to assist in the explanation of the multiple swirling flow suppression portions and the cover portion that constitute the straightening mechanism. [Diagram 25] FIG. 23 is a cross-sectional view of the straightening mechanism in an eleventh embodiment, taken along an imaginary plane including the fan axis, and is a diagram to assist in the explanation of the multiple swirling flow suppression portions and the cover portion that configure the straightening mechanism. [Figure 26] FIG. 23 is a cross-sectional view of the straightening mechanism in a twelfth embodiment, taken along an imaginary plane including the fan axis, and is a diagram to assist in the explanation of the multiple swirling flow suppression portions and the cover portion that constitute the straightening mechanism. [Figure 27] FIG. 27 is a cross-sectional view taken along line XXVII-XXVII in FIG. 26 in the twelfth embodiment, and is a view for assisting in the explanation of the dimensions in the rotational direction of the swirling flow suppressing portion. [Figure 28] FIG. 28 is a cross-sectional view taken along line XXVIII-XXVIII in FIG. 26 in the twelfth embodiment, and is a view to assist in explaining the dimensions in the rotational direction of the swirling flow suppressing portion. [Figure 29] FIG. 29 is a cross-sectional view taken along line XXIX-XXIX in FIG. 26 in the twelfth embodiment, and is a view to assist in explaining the dimensions in the rotational direction of the swirling flow suppressing portion. [Diagram 30]This is an oblique view of the swirling flow suppression part in the thirteenth embodiment, viewed from the other side in the rotational direction, and is a figure to assist in the explanation of the swirling flow suppression part, which has a forward-moving shape and a forward-inclined shape, and the dotted line shows the comparative shape of the swirling flow suppression part. [Diagram 31] FIG. 23 is a perspective view for assisting in the explanation of the swirling flow suppression portion of the thirteenth embodiment, in which the chain line indicates a comparative example of the swirling flow suppression portion. [Diagram 32] This is an oblique view of the swirling flow suppression part in the 14th embodiment, viewed from the other side in the rotational direction, and is a figure to assist in the explanation of the swirling flow suppression part, which has a retreated shape and a forward-inclined shape, and the dotted line shows the comparative shape of the swirling flow suppression part. [Diagram 33] FIG. 23 is a perspective view for assisting in the explanation of the swirling flow suppression portion of the fourteenth embodiment, in which the chain line indicates a comparative example of the swirling flow suppression portion. [Diagram 34] This is an oblique view of the swirling flow suppression part in the 15th embodiment, viewed from the other side in the rotational direction, and is a figure to assist in the explanation of the swirling flow suppression part, which has a retreated shape and a forward-inclined shape, and the dotted line shows the comparative shape of the swirling flow suppression part. [Diagram 35] FIG. 23 is a perspective view for assisting in the explanation of the swirling flow suppression portion of the fifteenth embodiment, in which the chain line indicates a comparative example of the swirling flow suppression portion. [Diagram 36] This is an oblique view of the swirling flow suppression part in the 16th embodiment, viewed from the other side in the rotational direction, and is a figure to assist in the explanation of the swirling flow suppression part, which has a retreated shape and a forward-inclined shape, and the dotted line shows the comparative shape of the swirling flow suppression part. [Figure 37] FIG. 23 is a perspective view for assisting in the explanation of the swirling flow suppression portion of the sixteenth embodiment, in which the chain line indicates a comparative example of the swirling flow suppression portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0049] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings in order to simplify the description.

[0050] (First embodiment) As shown in FIG. 1, a vehicle air conditioning unit 10 of this embodiment includes an air conditioning case 12, an evaporator 16, a heater core 18, an electric blower 20, a plurality of doors 21, 22, 23, 24a, 24b, 25, and a straightening mechanism .

[0051] The vehicle air conditioning unit 10 is disposed, for example, inside an instrument panel provided at the front end of a vehicle interior. The arrows DR1 and DR2 in Fig. 1 indicate the directions of the vehicle on which the vehicle air conditioning unit 10 is mounted.

[0052] 1 indicates a vehicle front-rear direction DR1, and an arrow DR2 indicates a vehicle up-down direction DR2. These directions DR1 and DR2 intersect with each other, or strictly speaking, are perpendicular to each other.

[0053] The air conditioning case 12 is a resin member that forms the outer shell of the vehicle air conditioning unit 10. The air conditioning case 12 is formed with an outside air inlet 121, an inside air inlet 122, and air outlets 126, 127, and 128 that blow air out from inside the air conditioning case 12.

[0054] An internal case air passage 123 is formed inside the air conditioning case 12, through which air flows from one or both of the outside air inlet 121 and the inside air inlet 122 to each of the air outlets 126, 127, and 128. The internal case air passage 123 is formed so as to extend in the vehicle front-rear direction DR1.

[0055] The outside air inlet 121 is an inlet for introducing outside air, which is air outside the vehicle cabin, into the case interior air passage 123. The inside air inlet 122 is an inlet for introducing inside air, which is air inside the vehicle cabin, into the case interior air passage 123. Outside air or inside air is introduced into the air conditioning case 12 by the electric blower 20.

[0056] The outside air inlet 121 and the inside air inlet 122 are opened and closed by an inside / outside air switching door 25. Then, the air introduced from one or both of the outside air inlet 121 and the inside air inlet 122 flows into the evaporator 16.

[0057] The evaporator 16 is a cooling heat exchanger that cools the air passing through the evaporator 16. In short, the evaporator 16 is a cooler.

[0058] The evaporator 16 is housed in the air conditioning case 12. That is, the evaporator 16 is disposed in the case internal air passage 123, and is disposed so that outside air or internal air introduced into the case internal air passage 123 flows into the evaporator 16.

[0059] The evaporator 16, together with a compressor, a condenser, and an expansion valve (not shown), constitutes a well-known refrigeration cycle device that circulates a refrigerant. The evaporator 16 exchanges heat between the air passing through the evaporator 16 and the refrigerant, evaporating the refrigerant and cooling the air through the heat exchange.

[0060] The electric blower 20 has a blower fan 201 that is disposed in the air passage 123 inside the case and rotates about a fan axis CL1, and an electric motor (not shown) that drives and rotates the blower fan 201. In this embodiment, the blower fan 201 is a centrifugal fan.

[0061] That is, the electric blower 20 is a centrifugal blower that draws in air from one side of the fan axial direction DRa of the fan axis CL1 as the blower fan 201 rotates and blows the drawn air outward in the radial direction Kc1 of the blower fan 201.

[0062] Here, the air blown outward in the radial direction Kc1 by the electric blower 20 is guided by the air conditioning case 12 to the downstream side of the air flow of the internal-case air passage 123 (for example, the rear side of the vehicle in FIG. 1) as indicated by the arrow FLf. The fan axial direction DRa is the direction in which the fan axis CL1 extends.

[0063] More specifically, the electric blower 20 has a fan air inlet 201a and a fan air outlet 201b. The fan air inlet 201a is provided on one side of the fan axis line CL1 in the fan axial direction DRa of the blower fan 201, and is an inlet through which air is drawn in. The fan air outlet 201b is formed around the entire outer periphery of the blower fan 201, centered on the fan axis line CL1, and is an outlet through which air is blown out.

[0064] The blower fan 201 rotates about the fan axis CL1 and draws in air from one side in the fan axial direction DRa through the fan air inlet 201a. At the same time, the blower fan 201 blows out the drawn air from the fan air outlet 201b to the outside in the radial direction Kc1 of the blower fan 201 centered on the fan axis CL1.

[0065] A fan surrounding space 123b into which air flows from the blower fan 201 is formed on the outer side of the case internal air passage 123 of the air conditioning case 12 in a radial direction Kc1 centered on the fan axis CL1 relative to the blower fan 201.

[0066] The fan surrounding space 123b is provided between the blower fan 201 and an inner wall 12a of the air conditioning case 12 that forms the air passage 123 inside the case.

[0067] The air conditioning case 12 of this embodiment is configured to guide the air that has flowed from the blower fan 201 into the fan surrounding space 123b to the other side opposite to one side in the fan axial direction DRa.

[0068] For example, an air guide wall (not shown) arranged on one side of the fan axial direction DRa relative to the fan surrounding space 123b is provided inside the air conditioning case 12. The air conditioning case 12 guides the air in the fan surrounding space 123b to flow to the other side while preventing the air from flowing to one side in the fan axial direction DRa by the air guide wall.

[0069] As a result, the air blown outward from the blower fan 201 in the radial direction Kc1 enters the fan surrounding space 123b as indicated by the arrow FLf. Then, the air is guided by the air conditioning case 12 from the fan surrounding space 123b to the other side in the fan axial direction DRa relative to the blower fan 201.

[0070] In this embodiment, the fan axial direction DRa of the fan axis CL1 coincides with the vehicle front-rear direction DR1. The fan axial direction DRa of the fan axis CL1 will also be referred to as the fan axial direction DRa. The radial direction Kc1 of the blower fan 201 is the radial direction Kc1 centered on the fan axis CL1.

[0071] The electric blower 20 has a so-called suction type layout in which the blower fan 201 is disposed downstream of the air flow relative to the evaporator 16. The electric blower 20 is disposed such that one side of the fan axial direction DRa, which is the air suction side of the blower fan 201, faces the air outflow surface 16b of the evaporator 16.

[0072] Therefore, the blower fan 201 is disposed so that the other side of the fan axis CL1, which is opposite to one side of the fan axial direction DRa, extends downstream in the air flow of the air passage 123 inside the case.

[0073] The heater core 18 is disposed downstream of the air flow relative to the blower fan 201 in the case internal air passage 123. The heater core 18 is disposed at the center in the vehicle up-down direction DR2 in the case internal air passage 123. The heater core 18 is a heater that heats the air that passes through the heater core 18 out of the air flowing through the case internal air passage 123.

[0074] In the air conditioning case 12, an upper bypass passage 125a is formed above the heater core 18, and a lower bypass passage 125b is formed below the heater core 18. The upper bypass passage 125a and the lower bypass passage 125b are each included in the in-case air passage 123, and cause air to flow in parallel with the heater core 18.

[0075] That is, both the upper bypass passage 125a and the lower bypass passage 125b are bypass passages through which air flows to bypass the heater core 18.

[0076] An air mix door 24a and an air mix door 24b are provided in the case internal air passage 123 on the upstream side of the air flow with respect to the heater core 18. The air mix door 24a and the air mix door 24b are provided on the downstream side of the air flow with respect to the straightening mechanism 26.

[0077] In other words, the air mix doors 24a, 24b are provided on the other side in the fan axial direction DRa with respect to the straightening mechanism 26. The heater core 18 and the bypass passages 125a, 125b are provided on the other side in the fan axial direction DRa with respect to the air mix doors 24a, 24b.

[0078] The air mix door 24a is disposed in the upper bypass passage 125a and opens and closes the upper bypass passage 125a. The air mix door 24a is a sliding door mechanism, and is slid by an electric actuator (not shown).

[0079] The air mix door 24a adjusts the ratio of the amount of air passing through the heater core 18 to the amount of air passing through the upper bypass passage 125a according to its sliding position.

[0080] The air mix door 24b is disposed in the lower bypass passage 125b and opens and closes the lower bypass passage 125b. The air mix door 24b is a sliding door mechanism, and is slid by an electric actuator (not shown).

[0081] The air mix door 24b adjusts the ratio of the amount of air passing through the heater core 18 to the amount of air passing through the lower bypass passage 125b according to its sliding position.

[0082] The air conditioning case 12 is formed with a face outlet 126 , a defroster outlet 127 , and a foot outlet 128 for blowing air out of the air conditioning case 12 .

[0083] The face air outlet 126, the defroster air outlet 127, and the foot air outlet 128 are each connected to the case internal air passage 123 on the downstream side of the air flow relative to the heater core 18 and each of the bypass passages 125a, 125b.

[0084] The air flowing out from the face air outlet 126 is guided through a duct (not shown) and is blown out toward the face or chest of an occupant sitting in the front seat inside the vehicle cabin. The air flowing out from the defroster air outlet 127 is guided through a duct (not shown) and is blown out toward the front window glass inside the vehicle cabin. The air flowing out from the foot air outlet 128 is guided through a duct (not shown) and is blown out toward the feet of an occupant sitting in the front seat inside the vehicle cabin.

[0085] In addition, a face door 21 is provided at the face air outlet 126, and the face door 21 opens and closes the face air outlet 126. A defroster door 22 is provided at the defroster air outlet 127, and the defroster door 22 opens and closes the defroster air outlet 127. A foot door 23 is provided at the foot air outlet 128, and the foot door 23 opens and closes the foot air outlet 128.

[0086] In the case internal air passage 123, on the air flow downstream side of the heater core 18, the warm air that has passed through the heater core 18 and the cool air that has passed through the upper bypass passage 125a are mixed. Then, the mixed air is blown into the vehicle compartment mainly from one of the face air outlet 126 and the defroster air outlet 127, whichever is open.

[0087] Further, on the downstream side of the air flow of the heater core 18, the warm air blown out from the heater core 18 is mixed with the cool air passing through the lower bypass passage 125b. When the foot air outlet 128 is open, the mixed air is mainly blown out from the foot air outlet 128 into the vehicle compartment.

[0088] As shown in FIG. 1, the straightening mechanism 26 is disposed in the case internal air passage 123 on the downstream side of the air flow with respect to the blower fan 201, and is disposed on the upstream side of the air flow with respect to the heater core 18 and the air mix doors 24a, 24b.

[0089] Therefore, air blown out from the blower fan 201 flows into the rectification mechanism 26 , and the blown out air passes through the rectification mechanism 26 before flowing into the bypass passages 125 a , 125 b or the heater core 18 .

[0090] Here, the blower fan 201 is disposed so that the other side in the fan axial direction DRa faces the downstream side of the air flow of the air passage 123 inside the case.

[0091] The rectifying mechanism 26 of the present embodiment suppresses the swirling flow generated by the rotation of the blower fan 201, and generates an airflow that flows on the other side in the fan axial direction DRa. The swirling flow is an airflow that swirls around the fan axis CL1. Specifically, as shown in FIG. 2, the rectifying mechanism 26 includes a cover portion 26a and a plurality of swirling flow suppressing portions 26b.

[0092] The cover portion 26a is formed in a disk shape covering the other side of the blower fan 201 in the fan axial direction DRa. A passage 130 is provided between the cover portion 26a and the inner wall 12a of the air conditioning case 12. The passage 130 constitutes a part of the air passage 123 inside the case.

[0093] 2, the multiple swirl flow suppression portions 26b are each disposed between the cover portion 26a and the inner wall 12a. The multiple swirl flow suppression portions 26b are each arranged at intervals in the circumferential direction about the fan axis CL1.

[0094] The swirling flow suppression parts 26b are each connected to the inner wall 12a at an outer side in the radial direction Kc1. The swirling flow suppression parts 26b are each connected to the cover part 26a at an inner side in the radial direction Kc1. The swirling flow suppression parts 26b divide the passage 130 into a plurality of divided passages 130a.

[0095] In the flow straightening mechanism 26 of the present embodiment, the eight swirl flow suppression portions 26b form eight divided passages 130a.

[0096] The multiple split passages 130a are formed such that the circumferential distance increases from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1. The multiple swirl flow suppression parts 26b suppress the swirl flows flowing in the multiple split passages 130a, and generate airflow that flows on the other side in the fan axial direction DRa.

[0097] Hereinafter, for convenience of explanation, the interval between two adjacent swirling flow suppression portions 26b among the plurality of swirling flow suppression portions 26b is referred to as interval Kn as shown in Fig. 2. In this embodiment, the plurality of swirling flow suppression portions 26b are arranged in the circumferential direction so as to form two or more different intervals Kn. For example, the straightening mechanism 26 is configured so that the intervals Kn of the eight divided passages 130a are different from each other.

[0098] This distributes the frequency of noise that occurs when the swirling flow is guided by the multiple swirling flow suppression portions 26b. As shown in FIG. 3, each of the multiple swirl flow suppression portions 26b is formed in a backward inclined shape that inclines toward the other side in the fan axial direction DRa from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0099] Each of the plurality of swirl flow suppression portions 26b is provided on one side in the fan axial direction DRa with an end face 270 formed over the radial direction Kc1 as one-side end portion. The end face 270 of each of the plurality of swirl flow suppression portions 26b is formed to progress toward the other side in the fan axial direction DRa as it moves from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1.

[0100] In each of the multiple end faces 270, the end located most outside in the radial direction Kc1 is referred to as a radially outer end 271. In each of the multiple end faces 270, the end located most inside in the radial direction Kc1 is referred to as a radially inner end 272.

[0101] Here, the distance in the fan axial direction DRa between the radially outer end 271 and the radially inner end 272 is taken as an axial distance dDR.

[0102] The multiple swirling flow suppression parts 26b in this embodiment include at least two or more swirling flow suppression parts 26b that form different axial distances dDR from each other. For example, the multiple swirling flow suppression parts 26b are configured to have different axial distances dDR.

[0103] This distributes the frequency of noise that occurs when the swirling flow is guided by the multiple swirling flow suppression portions 26b.

[0104] As shown in FIG. 4, the rectifying mechanism 26 is formed so that when the light source 300 is projected onto a wall 301 from one side in the fan axial direction DRa, the shadows cast by the multiple swirling flow suppression portions 26b are shifted.

[0105] That is, the rectification mechanism 26 is formed so as to prevent the shadows cast by the multiple swirling flow suppression portions 26b from overlapping when projected by the light source 300 from one side in the fan axial direction DRa.

[0106] This makes it possible, when the straightening mechanism 26 is injection molded using a resin material or a metal material, to easily remove the molded product, the straightening mechanism 26, from the mold by moving the mold to one side or the other in the fan axial direction DRa.

[0107] FIG. 4 shows an example in which the light source 300 is disposed on one side of the rectifying mechanism 26 in the fan axis direction DRa, and the wall 301 is disposed on the other side of the rectifying mechanism 26 in the fan axis direction DRa.

[0108] In this embodiment, the straightening mechanism 26, the blower fan 201, and the air conditioning case 12 configure the blower device 100.

[0109] Next, the operation of the vehicle air conditioning unit 10 will be described.

[0110] First, when electric blower 20 starts operating, air is introduced into in-case air passage 123 formed in air-conditioning case 12 via outside air inlet 121 or inside air inlet 122, as shown in Fig. 1. The air introduced into in-case air passage 123 is cooled by evaporator 16 and passes through evaporator 16.

[0111] The air cooled by the evaporator 16 is sucked into the blower fan 201 of the electric blower 20, and is blown outward in the radial direction Kc1 of the blower fan 201, and flows into the fan surrounding space 123b.

[0112] Therefore, the air that has flowed into the fan surrounding space 123b is guided by the air conditioning case 12 to the straightening mechanism .

[0113] The air guided from the fan surrounding space 123b to the rectification mechanism 26 contains a swirling flow generated by the rotation of the blower fan 201. The wind speed of the swirling flow increases from the inside to the outside in the radial direction Kc1 centered on the fan axis CL1.

[0114] The swirling flow from the fan surrounding space 123b collides with each of the multiple swirling flow suppressing portions 26b of the flow straightening mechanism 26. At this time, each of the multiple swirling flow suppressing portions 26b suppresses the swirling flow and generates an airflow that flows on the other side in the fan axial direction DRa.

[0115] As described above, each of the end faces 270 of the multiple swirl flow suppression portions 26b is formed in a rearward inclination shape that progresses toward the other side in the fan axial direction DRa as it moves from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0116] For this reason, in this embodiment, the wind speed of the swirling flow colliding with the multiple swirling flow suppression parts 26ba can be reduced compared to a comparative example in which the multiple swirling flow suppression parts 26b are formed to extend in the radial direction Kc1.

[0117] Therefore, compared to the above-described comparative example in which multiple swirling flow suppression portions 26b are used, it is possible to reduce noise that occurs when the swirling flow collides with the multiple swirling flow suppression portions 26b.

[0118] In the comparative example in which the multiple swirling flow suppression portions 26b are arranged at equal intervals in the circumferential direction, the frequency of noise generated when the swirling flow collides with the multiple swirling flow suppression portions 26b is limited to a narrow frequency band.

[0119] In contrast, the multiple swirling flow suppression parts 26b in this embodiment are arranged in the circumferential direction to form different intervals Kn between each other. Therefore, compared to a comparative example in which the multiple swirling flow suppression parts 26b are arranged in the circumferential direction at equal intervals, it is possible to widen the frequency band of noise generated when the swirling flow collides with the multiple swirling flow suppression parts 26b.

[0120] In addition, the multiple swirling flow suppression parts 26b in this embodiment are configured to have different axial distances dDR, which makes it possible to widen the frequency band of noise generated when the swirling flow collides with the multiple swirling flow suppression parts 26b, compared to a comparative example in which the multiple swirling flow suppression parts 26b are formed to extend in the radial direction Kc1.

[0121] In this way, the swirling flow is guided by the multiple swirling flow suppression portions 26b and flows to the other side in the fan axial direction DRa. If the air flowing to the other side in the fan axial direction DRa passes through the heater core 18, it becomes warm air and flows downstream of the heater core 18 in the air flow, and if it passes through the bypass passages 125a, 125b, it remains cold air and flows downstream of the heater core 18 in the air flow.

[0122] The warm air and the cold air are mixed on the downstream side of the air flow of the heater core 18, and the mixed air is blown out to a predetermined location in the vehicle cabin from an open outlet among the face outlet 126, the defroster outlet 127, and the foot outlet 128.

[0123] According to the present embodiment described above, the vehicle air conditioning unit 10 includes the air conditioning case 12 having the inner wall 12a that forms the case interior air passage 123 through which air passes.

[0124] The vehicle air conditioning unit 10 includes a blower fan 201 that is disposed in an air passage 123 inside the case and rotates about a fan axis CL1 to draw in air from one side of the fan axis direction DRa and blow it outward in a radial direction Kc1 around the fan axis CL1.

[0125] The vehicle air conditioning unit 10 includes a cover portion 26a that is disposed on the other side of the blower fan 201 in the fan axial direction DRa of the case internal air passage 123 and is formed so as to cover the other side of the blower fan 201 in the fan axial direction DRa.

[0126] Between the cover portion 26a and the inner wall 12a of the air conditioning case 12, a passage 130 is formed through which the air blown out from the blower fan 201 flows to the other side in the fan axial direction DRa.

[0127] The vehicle air conditioning unit 10 includes a plurality of swirl flow suppressing portions 26b disposed in the passage 130 and formed in a radial direction Kc1 centered on the fan axis CL1. Each of the plurality of swirl flow suppressing portions 26b suppresses a swirl flow of air generated by the rotation of the blower fan 201, and generates an air flow that flows on the other side in the fan axis direction DRa.

[0128] The multiple swirl flow suppression portions 26b are formed such that an end face 270 of each of them approaches the other side in the fan axial direction DRa as it progresses from the inner side in the radial direction Kc1 about the fan axis CL1 to the outer side in the radial direction Kc1.

[0129] Therefore, according to this embodiment, the wind speed of the swirling flow colliding with the multiple swirling flow suppression sections 26b can be reduced compared to when the multiple swirling flow suppression sections 26b are formed to extend from the inside in the radial direction Kc1 to the outside in the radial direction Kc1.

[0130] This makes it possible to reduce noise that occurs when air blown out from blower fan 201 collides with multiple swirl flow suppression portions 26b. As a result, it is possible to provide blower device 100 that reduces noise.

[0131] The vehicle air conditioning unit 10 of this embodiment configured as above provides the following operational advantages (a), (b), and (c).

[0132] (a) In this embodiment, the multiple swirl flow suppression parts 26b are arranged in the circumferential direction about the fan axis CL1 so as to form different intervals Kn between each other. This makes it possible to disperse the frequency of noise that occurs when the swirl flow is guided by the multiple swirl flow suppression parts 26b. This makes it possible to reduce the discomfort felt by the user due to the noise.

[0133] (b) The multiple swirl flow suppression portions 26b are configured to have different axial distances dDR. The axial distance dDR is the distance in the fan axial direction DRa between the radial outer end portion 271 and the radial inner end portion 272.

[0134] Therefore, the frequency of the air colliding with the multiple swirl flow suppression portions 26b can be dispersed, thereby reducing the discomfort felt by the user due to noise.

[0135] (c) The multiple swirl flow suppression portions 26b are provided so as to prevent the shadows of the multiple swirl flow suppression portions 26b from overlapping when projected from one side in the fan axial direction DRa.

[0136] This makes it possible, when injection molding the straightening mechanism 26, to easily remove the molded product, that is, the straightening mechanism 26, from the mold by moving the mold to one side or the other in the fan axial direction DRa.

[0137] Second embodiment In the straightening mechanism 26 of the second embodiment, an example in which the multiple swirling flow suppression portions 26b in the straightening mechanism 26 of the first embodiment described above are formed so as to be curved so as to be convex on one side in the fan axial direction DRa will be described with reference to Figure 5.

[0138] FIG. 5 is a cross-sectional view of the blower fan and the rectifying mechanism in this embodiment, taken along an imaginary plane including the fan axis.

[0139] According to the embodiment described above, the multiple swirl flow suppression portions 26b are formed to be curved so as to be convex toward one side in the fan axial direction DRa. As a result, it is possible to provide the blower device 100 that further reduces noise.

[0140] Third embodiment In this third embodiment, an example of the first embodiment in which the inclination angle of each of the axial end faces 27a, 27b of the multiple swirling flow suppression sections 26b becomes smaller from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1 will be described with reference to Figures 6 to 10.

[0141] The present embodiment differs from the above-described first embodiment only in the configuration of the plurality of swirling flow suppression portions 26b, and therefore the following description will mainly focus on the configuration of the plurality of swirling flow suppression portions 26b.

[0142] Fig. 6 is a cross-sectional view of the rectifying mechanism 26 of this embodiment taken along a virtual plane perpendicular to the fan axis CL1, and Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 6. Fig. 8 is a cross-sectional view taken along line VIII-VIII in Fig. 6, and Fig. 9 is a cross-sectional view taken along line IX-IX in Fig. 6. Figs. 7, 8, and 9 are cross-sectional views of one swirl flow suppression portion 26b.

[0143] Fig. 7 is a cross-sectional view of a portion of one swirling flow suppression portion 26b that is on the outer side in the radial direction Kc1 compared to Fig. 8. Fig. 8 is a cross-sectional view of a portion of one swirling flow suppression portion 26b that is on the outer side in the radial direction Kc1 compared to Fig. 9.

[0144] As shown in FIGS. 7, 8, and 9, each of the multiple swirl flow suppression portions 26b includes a front guide portion 280 and a rear guide portion 281.

[0145] The front guide portion 280 is formed across the rotation direction Ka1 of the blower fan 201. The rear guide portion 281 is formed to extend from one end of the front guide portion 280 in the rotation direction Ka1 to the other side in the fan axial direction DRa.

[0146] The front guide portion 280 of this embodiment is formed so as to be inclined toward the other side in the axial direction from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1. As a result, each of the multiple swirl flow suppression portions 26b is formed in a rearward inclination shape that is inclined toward the other side in the fan axial direction DRa from the inside in the radial direction Kc1 centered on the fan axis CL1 toward the outside in the radial direction Kc1.

[0147] The front guide portion 280 is formed such that its axis line AZ1 intersects with a reference line KJ1. The axis line AZ1 is an imaginary line that indicates the axis of the front guide portion 280. The reference line KJ1 is an imaginary line that is perpendicular to the fan axial direction DRa, parallel to the rotational direction Ka1, and perpendicular to the radial direction Kc1.

[0148] 7, 8, and 9, the front guide portion 280 is formed such that a narrow angle θ1 formed between the axis line AZ1 and the reference line KJ1 becomes smaller from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1. The narrow angle is an angle that is greater than zero degrees and less than 180 degrees.

[0149] End faces 27a, 28a are provided on one axial side of each of the plurality of swirling flow suppression portions 26b. End faces 27b, 28b are provided on the other axial side of each of the plurality of swirling flow suppression portions 26b.

[0150] The end face 27a is disposed on one side in the rotational direction Ka1 with respect to the end face 28a. The end face 27a is formed so as to extend to one side in the rotational direction Ka1 from one end of the end face 28a in the rotational direction Ka1.

[0151] The end face 27b is disposed on one side in the rotational direction Ka1 with respect to the end face 28b. The end face 27b is formed to extend to one side in the rotational direction Ka1 from one end of the end face 28b in the rotational direction Ka1. The multiple swirl flow suppression portions 26b are formed such that the end faces 27a of each of the end faces 27a move toward the other side in the fan axial direction DRa as they move from the inner side in the radial direction Kc1 about the fan axis CL1 to the outer side in the radial direction Kc1.

[0152] Figures 10, 11, and 12 respectively show the narrow angle θ2 formed between the imaginary plane Sa and the end face 27a, and the narrow angle θ3 formed between the imaginary plane Sa and the end face 27b. Figure 10 shows the narrow angle θ2 formed between the end face 27a and the imaginary plane Sa in Figure 7, and the narrow angle θ3 formed between the end face 27b and the imaginary plane Sa in Figure 7.

[0153] Fig. 11 shows the narrow angle θ2 formed between the end face 27a and the imaginary plane Sa in Fig. 8, and the narrow angle θ3 formed between the end face 27b and the imaginary plane Sa in Fig. 8. Fig. 12 shows the narrow angle θ3 formed between the end face 27a and the imaginary plane Sa in Fig. 9, and the narrow angle θ3 formed between the end face 27b and the imaginary plane Sa in Fig. 9.

[0154] In this embodiment, which is configured in this manner, the front guide portions 280 of each of the multiple swirling flow suppression portions 26b have end faces 27a, 27b formed so that the narrow angles θ2, θ3 (i.e., the inclination angles) become smaller from the inner side of the radial direction Kc1 toward the outer side of the radial direction Kc1.

[0155] According to the present embodiment described above, each of the multiple swirling flow suppression sections 26b is formed in a rearward inclined shape that slopes toward the other side in the fan axial direction DRa as it progresses from the inside in the radial direction Kc1 centered on the fan axis CL1 to the outside in the radial direction Kc1.

[0156] Therefore, similarly to the first embodiment, it is possible to reduce noise that occurs when air blown out from the blower fan 201 collides with the multiple swirl flow suppression portions 26b. As a result, it is possible to provide a blower device 100 that reduces noise.

[0157] In this embodiment, in each of the multiple swirling flow suppression parts 26b, the narrow angles θ2, θ3 formed between the imaginary plane Sa and the end faces 27a, 27b become smaller from the inside in the radial direction Kc1 to the outside in the radial direction Kc1. Therefore, the pressure loss of the swirling flow caused by the end faces 27a, 27b becomes smaller from the inside in the radial direction Kc1 to the outside in the radial direction Kc1.

[0158] Here, the swirling flow has a faster wind speed on the outside in the radial direction Kc1 than on the inside in the radial direction Kc1. Therefore, by reducing the pressure loss caused by the swirling flow flowing on the outside in the radial direction Kc1, the pressure loss can be reduced efficiently.

[0159] (Fourth embodiment) In the above first embodiment, an example has been described in which the dimensions of each of the multiple swirling flow suppression portions 26b in the rotational direction Ka1 are uniform throughout the radial direction Kc1.

[0160] Instead, in this fourth embodiment, an example in which the dimension dDa in the rotational direction Ka1 of each of the multiple swirling flow suppression sections 26b increases from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1 is described with reference to Figures 13, 14, 15, and 16.

[0161] Fig. 13 is a cross-sectional view of the rectifying mechanism 26 of the present embodiment taken along an imaginary plane perpendicular to the fan axis CL1, Fig. 14 is a cross-sectional view taken along line XIV-XIV in Fig. 13. Fig. 15 is a cross-sectional view taken along line XV-XV in Fig. 13, and Fig. 16 is a cross-sectional view taken along line XVI-XVI in Fig. 13.

[0162] Figures 14, 15, and 16 are cross-sectional views of one swirling flow suppression portion 26b, and Figure 14 is a cross-sectional view of a portion of one swirling flow suppression portion 26b that is more outward in the radial direction Kc1 than Figure 15. Figure 15 is a cross-sectional view of a portion of one swirling flow suppression portion 26b that is more outward in the radial direction Kc1 than Figure 16.

[0163] According to the present embodiment described above, the dimension dDa of each of the multiple swirling flow suppression parts 26b in the rotational direction Ka1 gradually increases from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1. The dimension dDa is the dimension between the end faces 275A, 275B of each of the multiple swirling flow suppression parts 26b.

[0164] The end face 275A is an end face on the other side of the rotation direction Ka1 in each of the multiple swirling flow suppression parts 26b. The end face 275B is an end face on one side of the rotation direction Ka1 in each of the multiple swirling flow suppression parts 26b.

[0165] Therefore, compared to the first embodiment, the pressure loss that occurs when the airflow passes through the multiple divided passages 130a increases from the inner side in the radial direction Kc1 to the outer side in the radial direction Kc1.

[0166] Therefore, compared to the first embodiment, the amount of air flowing toward the outer sides of the multiple divided passages 130a in the radial direction Kc1 can be reduced.

[0167] This makes it possible to reduce noise that occurs when the swirling flow flowing on the outside in the radial direction Kc1 collides with the multiple swirling flow suppression portions 26b. As a result, it is possible to provide a blower device 100 that reduces noise.

[0168] Fifth embodiment In the above first embodiment, an example has been described in which the multiple swirling flow suppression portions 26b are each formed to extend in the radial direction Kc1.

[0169] However, instead, in the present fifth embodiment, an example in which each of the multiple swirling flow suppression sections 26b is formed to progress toward one side of the rotational direction Ka1 as it moves from the inside of the radial direction Kc1 toward the outside of the radial direction Kc1 will be described with reference to Figure 17.

[0170] Fig. 17 is a cross-sectional view of the straightening mechanism 26 of the present embodiment taken along an imaginary plane perpendicular to the fan axis CL1. The chain lines in Fig. 17 indicate, for comparison, a plurality of swirl flow suppression portions 26b formed to extend in the radial direction Kc1.

[0171] In this embodiment, each of the plurality of swirl flow suppression parts 26b is formed in a recessed shape that progresses toward one side in the rotation direction Ka1 from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1. In this embodiment, each of the plurality of swirl flow suppression parts 26b is provided with an end face 270A as the other side end part formed across the radial direction Kc1 on the other side in the rotation direction Ka1 of the blower fan 201.

[0172] The multiple swirling flow suppression parts 26b are formed such that the end faces 270A of each of them progress toward one side in the rotation direction Ka1 as they move from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1. Therefore, compared to a comparative example in which the multiple swirling flow suppression parts 26b are formed to extend from the inside in the radial direction Kc1 to the outside in the radial direction Kc1, it is possible to reduce the wind speed when the swirling flow collides with the multiple swirling flow suppression parts 26b.

[0173] This makes it possible to reduce noise that occurs when air blown out from blower fan 201 collides with multiple swirl flow suppression portions 26b. As a result, it is possible to provide blower device 100 that reduces noise.

[0174] In each of the multiple end faces 270A, the end located most outside in the radial direction Kc1 is referred to as a radially outer end 273. In each of the multiple end faces 270A, the end located most inside in the radial direction Kc1 is referred to as a radially inner end 274.

[0175] Hereinafter, the distance in the rotational direction Ka1 between the radially outer end 273 and the radially inner end 274 is defined as a rotational distance dDk.

[0176] The plurality of swirling flow suppression parts 26b in this embodiment are configured to include at least two or more swirling flow suppression parts 26b that form different rotational distances dDk from each other. For example, the plurality of swirling flow suppression parts 26b are configured to have different rotational distances dDk.

[0177] This distributes the frequency of the noise generated when the swirling flow collides with the multiple swirling flow suppression portions 26b, thereby reducing the discomfort felt by the user due to the noise.

[0178] Sixth embodiment In the sixth embodiment, an example in which a reinforcing ring 29 is added to the rectifying mechanism 26 of the fifth embodiment will be described with reference to Fig. 18. Fig. 18 is a cross-sectional view of the rectifying mechanism 26 of the present embodiment taken along a virtual plane perpendicular to the fan axis CL1.

[0179] In the flow straightening mechanism 26 of the present embodiment, the multiple swirl flow suppression portions 26b are connected by a reinforcing ring 29. The reinforcing ring 29 is formed in a ring shape centered on the fan axis line CL1, thereby making it possible to improve the strength of the multiple swirl flow suppression portions 26b.

[0180] Seventh embodiment In the seventh embodiment, an example in which a plurality of swirling flow suppression portions 26b are formed in a curved shape in the flow straightening mechanism 26 of the first embodiment will be described with reference to FIG.

[0181] As shown in Fig. 19, each of the multiple swirl flow suppression parts 26b is formed in a curved shape so as to be convex toward one side of the rotation direction Ka1 in the inclination direction Kd1. The inclination direction Kd1 is a cross direction that intersects with the rotation direction Ka1 and also intersects with the fan axial direction DRa. Specifically, the inclination direction Kd1 is a cross direction that is perpendicular to the rotation direction Ka1 and also perpendicular to the fan axial direction DRa.

[0182] The inclination direction Kd1 is formed such that the more it moves from the other side in the fan axial direction DRa toward one side in the fan axial direction DRa, the more it moves from the other side in the rotational direction Ka1 toward one side in the rotational direction Ka1.

[0183] Each of the plurality of swirling flow suppression parts 26b is provided with an end face 270B on one side in the rotation direction Ka1 in the inclination direction Kd1. Each of the plurality of swirling flow suppression parts 26b is provided with an end face 270A on the other side in the rotation direction Ka1 in the inclination direction Kd1.

[0184] The end face 270B and the end face 270A are each formed in a curved shape that is convex toward one side in the rotation direction Ka1 in the inclination direction Kd1.

[0185] According to the present embodiment described above, the end faces 270 of the plurality of swirl flow suppression portions 26b are formed such that the end faces 270 are gradually shifted from the inner side in the radial direction Kc1 about the fan axis CL1 to the outer side in the radial direction Kc1 toward the other side in the fan axial direction DRa. The end faces 270A of the plurality of swirl flow suppression portions 26b are formed in a curved shape that is convex toward one side in the rotation direction Ka1 in the inclination direction Kd1.

[0186] The end faces 270B of the plurality of swirling flow suppression portions 26b are formed in a curved shape that is convex toward one side of the rotation direction Ka1 in the inclination direction Kd1. This can reduce pressure loss when the airflow passes through the rectification mechanism 26. As a result, it is possible to provide a blower device 100 that further reduces noise.

[0187] Eighth embodiment In the above first embodiment, an example has been described in which each of the multiple swirl flow suppression portions 26b is formed so as to progress toward the other side in the fan axial direction DRa as it moves from the inner side in the radial direction Kc1 to the outer side in the radial direction Kc1.

[0188] However, instead, in the eighth embodiment, an example in which each of the multiple swirling flow suppression sections 26b is formed so as to progress toward one side in the fan axial direction DRa as it moves from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1 will be described with reference to Figures 20, 21, and 22.

[0189] Fig. 20 is a cross-sectional view of the rectifying mechanism 26 of the present embodiment, taken along an imaginary plane including the fan axis line CL1. The chain lines in Fig. 20 indicate, for comparison, a plurality of swirl flow suppression parts 26b formed to extend in the radial direction Kc1.

[0190] FIG. 21 is a diagram showing the cover portion 26a and one swirling flow suppression portion 26b in the flow straightening mechanism 26 of the present embodiment, and is a diagram showing the wind speed Za of the air flowing from the divided passage 130a to the other side in the fan axial direction DRa.

[0191] Figure 22 is a diagram showing the wind speed Za of air flowing from the split passage 130a to the other side in the fan axial direction DRa in a comparative example in which multiple swirling flow suppression sections 26b are formed to extend from the inside in the radial direction Kc1 to the outside in the radial direction Kc1.

[0192] Each of the multiple swirl flow suppressing portions 26b can suppress a swirl flow and generate an air flow that flows on the other side in the fan axial direction DRa.

[0193] Here, the wind speed of the swirling flow increases from the inside in the radial direction Kc1 to the outside in the radial direction Kc1. Therefore, the multiple swirling flow suppression parts 26b of the present embodiment can generate air flows that flow faster from the inside in the radial direction Kc1 to the outside in the radial direction Kc1.

[0194] Furthermore, according to this embodiment, each of the multiple swirl flow suppression parts 26b is formed in a forward inclination shape that progresses to one side in the fan axial direction DRa from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1. Each of the multiple swirl flow suppression parts 26b is formed such that the end face 270 progresses to one side in the fan axial direction DRa from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1.

[0195] As a result, within the passage 130 on the air flow downstream side of the multiple swirling flow suppression sections 26b, the difference in wind speed between the air flowing radially outward and the air flowing radially inward can be made larger than in the above-mentioned comparison.

[0196] Therefore, in each of the passing passages 130, an air flow is generated that flows from the radial outside toward the radial center centered on the fan axis CL1, as indicated by the arrow Qz. This makes it possible to reduce the amount of air flowing from the passing passages 130 (i.e., the multiple divided passages 130a) to the other side in the fan axis direction DRa.

[0197] This can reduce noise that occurs when air flows from the passage 130 to the other side in the fan axial direction DRa. As a result, it is possible to provide the blower device 100 that reduces noise.

[0198] In this embodiment, similarly to the first embodiment, as shown in FIG. 20, each of the multiple swirl flow suppression portions 26b is provided with an end face 270 formed along the radial direction Kc1 on one side in the fan axial direction DRa.

[0199] In each of the end faces 270, the end located most outside in the radial direction Kc1 is defined as a radially outer end 271.

[0200] In each of the end faces 270, the end located most inward in the radial direction Kc1 is defined as a radially inner end 272. Here, the distance in the fan axial direction DRa between the radially outer end 271 and the radially inner end 272 is taken as an axial distance dDR.

[0201] The multiple swirling flow suppression parts 26b in this embodiment include at least two or more swirling flow suppression parts 26b that form different axial distances dDR from each other. For example, the multiple swirling flow suppression parts 26b are configured to have different axial distances dDR.

[0202] This distributes the frequency of noise that occurs when the swirling flow is guided by the multiple swirling flow suppression portions 26b, thereby reducing the discomfort felt by the user due to the noise.

[0203] Ninth embodiment In the ninth embodiment, an example in which the multiple swirl flow suppression portions 26b in the eighth embodiment are formed in a curved shape so as to protrude toward the other side in the fan axial direction DRa will be described with reference to FIG.

[0204] FIG. 23 is a cross-sectional view of the rectifying mechanism 26 of the present embodiment taken along an imaginary plane perpendicular to the fan axis CL1.

[0205] According to the present embodiment described above, the multiple swirl flow suppression portions 26b are formed in a curved shape so as to be convex on the other side in the fan axial direction DRa. This makes it possible to reduce pressure loss that occurs when air blown from the blower fan 201 passes through the rectification mechanism 26. As a result, it is possible to provide a blower device 100 that further reduces noise.

[0206] Tenth embodiment In the above fifth embodiment, an example has been described in which the end faces 270A of the multiple swirling flow suppression portions 26b are formed to progress toward one side in the rotation direction Ka1 as they move from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0207] However, instead, in the present tenth embodiment, an example is described with reference to Figure 24 in which the end faces 270A of the multiple swirling flow suppression sections 26b are formed so as to progress toward the other side of the rotational direction Ka1 as they move from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1.

[0208] Fig. 24 is a cross-sectional view of the rectifying mechanism 26 of the present embodiment taken along an imaginary plane perpendicular to the fan axis CL1. The chain lines in Fig. 22 indicate, for comparison, a plurality of swirl flow suppression portions 26b formed to extend in the radial direction Kc1.

[0209] Each of the multiple swirl flow suppressing portions 26b can suppress a swirl flow and generate an air flow that flows on the other side in the fan axial direction DRa.

[0210] Here, the wind speed of the swirling flow increases from the inside in the radial direction Kc1 to the outside in the radial direction Kc1. Therefore, the multiple swirling flow suppression parts 26b of the present embodiment can generate air flows that flow faster from the inside in the radial direction Kc1 to the outside in the radial direction Kc1.

[0211] In this embodiment, the multiple swirling flow suppression portions 26b are formed such that the end faces 270A of each of them progress toward the other side in the rotation direction Ka1 as they move from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0212] As a result, within the passage 130 on the air flow downstream side of the multiple swirling flow suppression sections 26b, the difference in wind speed between the air flowing radially outward and the air flowing radially inward can be made larger than in the above-mentioned comparison.

[0213] Therefore, similarly to the eighth embodiment, in each of the multiple split passages 130a, an air flow is generated that flows from the radial outside to the radial center side centered on the fan axis CL1. This makes it possible to reduce the amount of air flowing from the passing passage 130 (i.e., the multiple split passages 130a) to the other side in the fan axis direction DRa.

[0214] This can reduce noise that occurs when air flows from the passage 130 to the other side in the fan axial direction DRa. As a result, it is possible to provide the blower device 100 that reduces noise.

[0215] In this embodiment, similarly to the above-described fifth embodiment, in each of the multiple swirling flow suppression portions 26b, an end face 270A is provided as the other-side end portion formed along the radial direction Kc1 on the other side in the rotational direction Ka1 of the blower fan 201.

[0216] In each of the multiple end faces 270A, the end located most outside in the radial direction Kc1 is referred to as a radially outer end 273. In each of the multiple end faces 270A, the end located most inside in the radial direction Kc1 is referred to as a radially inner end 274.

[0217] Hereinafter, the distance in the rotational direction Ka1 between the radially outer end 273 and the radially inner end 274 is defined as a rotational distance dDk.

[0218] The plurality of swirling flow suppression parts 26b in this embodiment are configured to include at least two or more swirling flow suppression parts 26b that form different rotational distances dDk from each other. For example, the plurality of swirling flow suppression parts 26b are configured to have different rotational distances dDk.

[0219] As a result, similarly to the fifth embodiment, the frequency of the noise generated when the swirling flow collides with the multiple swirling flow suppression portions 26b is dispersed, thereby reducing the discomfort felt by the user due to the noise.

[0220] Eleventh embodiment In the eleventh embodiment, an example in which a plurality of swirling flow suppression portions 26b in the flow straightening mechanism 26 of the tenth embodiment are formed in a curved shape that protrudes toward one side in the rotational direction Ka1 will be described with reference to FIG.

[0221] FIG. 25 is a cross-sectional view of the rectifying mechanism 26 of the present embodiment taken along an imaginary plane perpendicular to the fan axis CL1.

[0222] According to the present embodiment described above, the multiple swirl flow suppression portions 26b are formed in a curved shape that protrudes toward one side in the rotation direction Ka1, thereby reducing the pressure loss that occurs when the airflow passes through the flow straightening mechanism 26.

[0223] As a result, it is possible to provide the blower device 100 that reduces noise even further.

[0224] Twelfth embodiment In the above fourth embodiment, an example has been described in which the dimension of each of the multiple swirling flow suppression portions 26b in the rotational direction Ka1 increases from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0225] However, instead, in the present twelfth embodiment, an example in which the dimension dDa in the rotational direction Ka1 of each of the multiple swirling flow suppression sections 26b becomes smaller from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1 is described with reference to Figures 26, 27, 28, and 29.

[0226] Figure 26 is a cross-sectional view of the rectifying mechanism 26 of this embodiment taken along an imaginary plane perpendicular to the fan axis CL1, and Figure 27 is a cross-sectional view taken along line XXVII-XXVII in Figure 26. Figure 28 is a cross-sectional view taken along line XXVIII-XXVIII in Figure 26, and Figure 29 is a cross-sectional view taken along line XXIX-XXIX in Figure 26. In Figure 26, the same reference numerals as in Figure 13 indicate the same elements, and descriptions thereof will be omitted.

[0227] Figures 27, 28, and 29 are cross-sectional views of one swirling flow suppression portion 26b, and Figure 27 is a cross-sectional view of a portion of one swirling flow suppression portion 26b that is more outward in the radial direction Kc1 than Figure 28. Figure 28 is a cross-sectional view of a portion of one swirling flow suppression portion 26b that is more outward in the radial direction Kc1 than Figure 29.

[0228] According to the present embodiment described above, each of the plurality of swirl flow suppressing portions 26b can suppress a swirl flow and generate an air flow that flows to the other side in the fan axial direction DRa.

[0229] Here, the wind speed of the swirling flow increases from the inside in the radial direction Kc1 to the outside in the radial direction Kc1. Therefore, the multiple swirling flow suppression parts 26b of the present embodiment can generate air flows that flow faster from the inside in the radial direction Kc1 to the outside in the radial direction Kc1.

[0230] The dimension dDa of each of the multiple swirl flow suppression portions 26b in the rotational direction Ka1 becomes smaller from the inside in the radial direction Kc1 to the outside in the radial direction Kc1. The dimension dDa is the dimension between the end faces 275A, 275B of each of the multiple swirl flow suppression portions 26b. Therefore, the dimension of each of the multiple divided passages 130a in the rotational direction Ka1 becomes larger from the inside in the radial direction Kc1 to the outside in the radial direction Kc1.

[0231] Therefore, the pressure loss that occurs when the airflow passes through the multiple divided passages 130a decreases from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0232] Therefore, in the passage 130 on the air flow downstream side of the multiple swirling flow suppression parts 26b, the difference in wind speed between the air flowing radially outside and the air flowing radially inside can be made larger than in the following comparative example. The comparative example refers to the multiple swirling flow suppression parts 26b formed to extend in the radial direction Kc1.

[0233] As a result, as in the above-described eighth and tenth embodiments, an air flow can be generated on the air flow downstream side of the multiple swirling flow suppression sections 26b, flowing from the outside in the radial direction kc1 within the multiple divided passages 130a toward the center in the radial direction kc1.

[0234] This reduces the amount of air flowing from the multiple divided passages 130a to the other side in the axial direction, thereby reducing noise generated when air flows through the multiple divided passages 130a.

[0235] Thirteenth embodiment In the straightening mechanism 26 of the thirteenth embodiment, an example is described with reference to Figures 30 and 31, in which a mechanism is used that combines the multiple forward-moving swirling flow suppression sections 26b of the tenth embodiment and the multiple forward-inclined swirling flow suppression sections 26b of the eighth embodiment.

[0236] 30 and 31 are perspective views of one swirl flow suppression portion 26b alone among the multiple swirl flow suppression portions 26b of the rectification mechanism 26, viewed from the other side in the rotational direction Ka1. The chain line in Fig. 30 indicates, for comparison, one swirl flow suppression portion 26b formed to extend in the radial direction Kc1. The chain line in Fig. 31 indicates, for comparison, one swirl flow suppression portion 26b whose position in the fan axial direction DRa is constant over the radial direction Kc1.

[0237] The multiple swirling flow suppression portions 26b of this embodiment are formed such that the end faces 270A of each of them progress toward the other side in the rotation direction Ka1 as they move from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1, similar to the tenth embodiment.

[0238] Therefore, similarly to the tenth embodiment, it is possible to reduce noise that occurs when air flows from the multiple split passages 130a to the other side in the fan axial direction DRa.

[0239] In the present embodiment, the end faces 270 of the plurality of swirl flow suppression portions 26b are formed so as to progress toward one side in the fan axial direction DRa from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1, similar to the above-described eighth embodiment. Therefore, similar to the above-described eighth embodiment, it is possible to reduce noise generated when air flows from the plurality of divided passages 130a to the other side in the fan axial direction DRa.

[0240] According to the present embodiment described above, by combining the tenth embodiment and the eighth embodiment, it is possible to further reduce noise.

[0241] Fourteenth embodiment In the straightening mechanism 26 of the fourteenth embodiment, an example is described with reference to Figures 32 and 33, in which a mechanism is used that combines the multiple recessed swirling flow suppression sections 26b of the fifth embodiment described above with the multiple forward-inclined swirling flow suppression sections 26b of the eighth embodiment described above.

[0242] 32 and 33 are perspective views of one swirl flow suppression portion 26b alone among the multiple swirl flow suppression portions 26b of the straightening mechanism 26, viewed from the other side in the rotational direction Ka1. The chain line in Fig. 33 indicates, for comparison, one swirl flow suppression portion 26b formed to extend in the radial direction Kc1. The chain line in Fig. 32 indicates, for comparison, one swirl flow suppression portion 26b whose position in the fan axial direction DRa is constant over the radial direction Kc1.

[0243] The multiple swirling flow suppression portions 26b of this embodiment are formed such that their end faces 270 progress toward one side in the fan axial direction DRa as they move from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1, similar to the eighth embodiment described above.

[0244] Therefore, similarly to the eighth embodiment, it is possible to reduce noise that occurs when air flows from the multiple divided passages 130a to the other side in the fan axial direction DRa.

[0245] Furthermore, the multiple swirling flow suppression portions 26b of this embodiment are formed such that the end faces 270A of each progress toward one side in the rotation direction Ka1 as they move from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1, similar to the above-described fifth embodiment.

[0246] Therefore, similarly to the fifth embodiment, it is possible to reduce noise that occurs when the air blown out from the blower fan 201 collides with the plurality of swirl flow suppression portions 26b.

[0247] According to the present embodiment described above, by combining the fifth embodiment and the eighth embodiment, it is possible to further reduce noise.

[0248] Fifteenth embodiment In the straightening mechanism 26 of this embodiment, an example of using a mechanism that combines multiple backward-inclined swirling flow suppression sections 26b in the first embodiment and multiple forward-inclined swirling flow suppression sections 26b in the tenth embodiment will be described with reference to Figures 34 and 35.

[0249] 34 and 35 are perspective views of one swirl flow suppression portion 26b alone among the multiple swirl flow suppression portions 26b of the straightening mechanism 26, viewed from the other side in the rotational direction Ka1. The chain line in Fig. 34 indicates, for comparison, one swirl flow suppression portion 26b formed to extend in the radial direction Kc1. The chain line in Fig. 35 indicates, for comparison, one swirl flow suppression portion 26b whose position in the fan axial direction DRa is constant over the radial direction Kc1.

[0250] In the present embodiment, the end faces 270 of the multiple swirl flow suppression parts 26b are formed such that, as in the first embodiment, the end faces 270 of the multiple swirl flow suppression parts 26b are gradually turned toward the other side in the fan axial direction DRa as they move from the inside to the outside in the radial direction Kc1 about the fan axis CL1. Therefore, as in the first embodiment, it is possible to reduce noise generated when air blown out from the blower fan 201 collides with the multiple swirl flow suppression parts 26b.

[0251] In the present embodiment, the end faces 270A of the plurality of swirl flow suppression portions 26b are formed so as to progress toward the other side in the rotation direction Ka1 from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1, similar to the tenth embodiment. Therefore, similar to the tenth embodiment, it is possible to reduce noise generated when air flows from the plurality of divided passages 130a to the other side in the fan axial direction DRa.

[0252] According to the present embodiment described above, by combining the first embodiment and the tenth embodiment, it is possible to further reduce noise.

[0253] Sixteenth embodiment In the straightening mechanism 26 of this embodiment, an example of using a mechanism that combines the multiple backward-inclined swirling flow suppression sections 26b in the first embodiment and the multiple retreated swirling flow suppression sections 26b in the fifth embodiment will be described with reference to Figures 36 and 37.

[0254] 36 and 37 are perspective views of one swirl flow suppression portion 26b alone among the multiple swirl flow suppression portions 26b of the straightening mechanism 26, viewed from the other side in the rotational direction Ka1. The chain line in Fig. 36 indicates, for comparison, one swirl flow suppression portion 26b formed to extend in the radial direction Kc1. The chain line in Fig. 37 indicates, for comparison, one swirl flow suppression portion 26b whose position in the fan axial direction DRa is constant over the radial direction Kc1.

[0255] In this embodiment, the end faces 270A of the multiple swirl flow suppression parts 26b are formed in a recessed shape that progresses toward one side in the rotation direction Ka1 from the inside in the radial direction Kc1 toward the outside in the radial direction Kc1, similar to the fifth embodiment. Therefore, similar to the fifth embodiment, it is possible to reduce noise generated when air blown out from the blower fan 201 collides with the multiple swirl flow suppression parts 26b.

[0256] In the present embodiment, the multiple swirling flow suppression portions 26b have end faces 270 that are formed such that, as in the first embodiment described above, the end faces 270 move toward the other side in the fan axial direction DRa as they move from the inside to the outside in the radial direction Kc1 centered on the fan axis CL1.

[0257] Therefore, similarly to the first embodiment, it is possible to reduce noise that occurs when the air blown out from the blower fan 201 collides with the plurality of swirl flow suppression portions 26b.

[0258] According to the present embodiment described above, by combining the first embodiment and the fifth embodiment, it is possible to further reduce noise.

[0259] (Other embodiments)

[0260] (1) In the above first to sixteenth embodiments, the blower device 100 of the present invention is applied to the vehicle air conditioning unit 10. In the above embodiments, as shown in FIG.

[0261] However, instead, the blower device 100 of the present invention may be applied to various devices other than the vehicle air conditioning unit 10, such as a stationary air conditioning unit.

[0262] (2) In the above fourth embodiment, an example has been described in which the dimension dDa in the rotational direction Ka1 of each of the multiple swirling flow suppression portions 26b increases from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0263] However, instead of this, in the above first to third embodiments and the above fourth to sixteenth embodiments, the dimension dDa in the rotational direction Ka1 of each of the multiple swirling flow suppression sections 26b may be made to increase from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0264] (3) In the twelfth embodiment, an example was described in which the dimension dDa in the rotational direction Ka1 of each of the multiple swirling flow suppression portions 26b becomes smaller from the inner side in the radial direction Kc1 to the outer side in the radial direction Kc1.

[0265] However, instead of this, in the above first to eleventh embodiments and the above twelfth to sixteenth embodiments, the dimension dDa in the rotational direction Ka1 of each of the multiple swirling flow suppression sections 26b may be made to become smaller from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0266] (4) In the above third embodiment, an example was described in which, in the multiple swirling flow suppression sections 26b of the first embodiment, the narrow angle θ2 formed between the end face 27a and the imaginary plane Sa becomes smaller as it moves from the inside of the radial direction Kc1 to the outside of the radial direction Kc1.

[0267] However, instead of this, in the multiple swirling flow suppression sections 26b of the second embodiment and the fourth to sixteenth embodiments, the narrow angle θ2 formed between the end face 27a and the imaginary plane Sa may be made to become smaller from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0268] In the multiple swirling flow suppression portions 26b of the second embodiment and the fourth to sixteenth embodiments described above, the narrow angle θ3 formed between the end face 27b and the imaginary plane Sa may be made to become smaller from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1.

[0269] (5) In the seventh embodiment, an example has been described in which the multiple swirling flow suppression portions 26b in the first embodiment are formed in a curved shape that protrudes toward one side in the rotation direction Ka1 in the inclination direction Kd1.

[0270] However, instead of this, in the second to sixth embodiments and the eighth to sixteenth embodiments, the multiple swirling flow suppression portions 26b may be formed in a curved shape that protrudes toward one side of the rotational direction Ka1 in the inclination direction Kd1.

[0271] (6) In the first and eighth embodiments, an example has been described in which the multiple swirling flow suppression portions 26b include at least two or more swirling flow suppression portions 26b that form different axial distances dDR from each other.

[0272] However, instead of this, in the above second to seventh embodiments and the above ninth to sixteenth embodiments, the multiple swirling flow suppression portions 26b may be configured to include at least two or more swirling flow suppression portions 26b that form axial distances dDR that are different from each other.

[0273] For example, in the second to seventh embodiments and the ninth to sixteenth embodiments, the multiple swirling flow suppression portions 26b may be configured to form different axial distances dDR.

[0274] (7) In the first embodiment described above, an example has been described in which the multiple swirling flow suppression portions 26b are arranged in the circumferential direction so as to form two or more different intervals Kn therebetween.

[0275] However, instead of this, in the second to sixteenth embodiments, the flow straightening mechanisms 26 may be arranged in the circumferential direction so as to form two or more different intervals Kn. For example, the flow straightening mechanism 26 may be configured so that the intervals Kn of the eight split passages 130a are different from each other.

[0276] (8) In the above first embodiment, the outer sides of the multiple swirling flow suppression parts 26b in the radial direction Kc1 are connected to the inner wall 12a, and the inner sides of the multiple swirling flow suppression parts 26b in the radial direction Kc1 are connected to the cover part 26a. However, instead of this, the following (a) and (b) may be used.

[0277] (a) The multiple swirling flow suppression parts 26b may be configured so that their outer sides in the radial direction Kc1 are connected to the inner wall 12a, and their inner sides in the radial direction Kc1 are not connected to the cover part 26a.

[0278] (b) The multiple swirling flow suppression parts 26b may be configured so that their outer sides in the radial direction Kc1 are not connected to the inner wall 12a, and their inner sides in the radial direction Kc1 are connected to the cover part 26a.

[0279] (9) In the above first and eighth embodiments, an example was described in which the distance in the fan axial direction DRa between the radial outer end portion 271 and the radial inner end portion 272 of each end face 270 of the multiple swirling flow suppression portions 26b was set to the axial distance dDR.

[0280] However, instead of this, the following may be adopted: In each of the plurality of swirl flow suppression portions 26b, an end portion formed on the other side in the fan axial direction DRa and extending in the radial direction Kc1 is defined as the other-side end face.

[0281] Of the other end faces of each of the multiple swirling flow suppression portions 26b, the end located most inward in the radial direction is defined as a radially inner end face, and the end located most outward in the radial direction is defined as a radially outer end face. Here, the axial distance between the radially inner end and the radially outer end is defined as an axial distance dDR.

[0282] (10) In the above fifth and tenth embodiments, examples were described in which the distance in the rotational direction Ka1 between the radially outer end portion 273 and the radially inner end portion 274 of each of the multiple end faces 270A of the multiple swirling flow suppression portions 26b was set to the rotational distance dDk.

[0283] However, instead of this, the following may be adopted: That is, in each of the plurality of swirl flow suppression portions 26b, an end portion formed on one side in the rotation direction Ka1 of the blower fan 201 and extending in the radial direction Kc1 is defined as a one-side end face.

[0284] The end portion located most outward in the radial direction Kc1 on one side end face of each of the plurality of swirl flow suppression portions 26b is defined as a radially outer end portion. The end portion located most inward in the radial direction Kc1 on one side end face of each of the plurality of end faces 270A is defined as a radially inner end portion.

[0285] Here, the distance in the rotational direction Ka1 between the radially outer end and the radially inner end is defined as a rotational distance dDk.

[0286] (11) In the above first embodiment, an example was described in which the straightening mechanism 26 is formed so that when the light source 300 is projected onto the wall 301 from one side of the fan axial direction DRa, the shadows cast by the multiple swirling flow suppression sections 26b are shifted.

[0287] Similarly, in the second to sixteenth embodiments, the straightening mechanism 26 may be formed so that when the light source 300 is projected onto the wall 301 from one side of the fan axial direction DRa, the shadow cast by the multiple swirling flow suppression sections 26b is shifted.

[0288] (12) In the above fourth embodiment, an example was described in which the dimension between the end faces 275A, 275B of the multiple swirling flow suppression portions 26b (that is, the dimension dDa in the rotational direction Ka1) increases from the inside to the outside in the radial direction Kc1.

[0289] However, the present invention is not limited to this, and as long as the dimension dDa in the rotational direction Ka1 of each of the multiple swirl flow suppression parts 26b increases from the inside to the outside in the radial direction Kc1, the dimension between the end faces 275A, 275B is not limited to the dimension dDa in the rotational direction Ka1. The same applies to the twelfth embodiment.

[0290] (12) In the fourth embodiment, an example has been described in which the dimension dDa in the rotational direction Ka1 of each of the multiple swirling flow suppression portions 26b increases from the inner side in the radial direction Kc1 toward the outer side in the radial direction Kc1. In addition, in the fourth embodiment, the multiple swirling flow suppression portions 26b may be configured to have the same shape, or two or more of the multiple swirling flow suppression portions 26b may have different shapes. (13) In the twelfth embodiment, an example was described in which the dimension dDa in the rotational direction Ka1 of each of the multiple swirling flow suppression portions 26b becomes smaller from the inner side in the radial direction Kc1 to the outer side in the radial direction Kc1. In addition, in the twelfth embodiment, the multiple swirling flow suppression portions 26b may be configured to have the same shape, or two or more of the multiple swirling flow suppression portions 26b may have different shapes. (14) Note that the present invention is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the claims. The above-described embodiments are not unrelated to each other, and can be combined as appropriate, except when the combination is clearly impossible. Needless to say, in each of the above-described embodiments, the elements constituting the embodiment are not necessarily essential, except when it is specifically stated that they are essential or when it is clearly considered to be essential in principle. In each of the above-described embodiments, when the numbers, values, amounts, ranges, etc. of the components of the embodiment are mentioned, they are not limited to the specific numbers, except when it is specifically stated that they are essential or when it is clearly limited to a specific number in principle. In each of the above-described embodiments, when the shapes, positional relationships, etc. of the components are mentioned, they are not limited to the shapes, positional relationships, etc., except when it is specifically stated that they are essential or when it is clearly limited to a specific shape, positional relationship, etc. in principle.

[0291] (Features of the present invention)

[0292] [Claim 1] A blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in the air from one side in the axial direction and blow the air outward in a radial direction about the axis, where the blower fan (201) is defined as an axial direction (DRa) in which an axis (CL1) extends; a cover portion (26a) that is disposed on the other side of the air passage relative to the blower fan in the axial direction, is formed so as to cover the other side of the blower fan in the axial direction, and forms, between the cover portion (26a) and the inner wall, a passage passage (130) that allows the air blown out from the blower fan to flow to the other side in the axial direction; at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; A blower device in which one axial end portion (270) of the at least one swirling flow suppression portion is formed so as to move toward the other axial side as it progresses from the radial inner side to the radial outer side. [Claim 2] A blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in the air from one side in the axial direction and blow the air outward in a radial direction about the axis, where the blower fan (201) is defined as an axial direction (DRa) in which an axis (CL1) extends; a cover portion (26a) that is disposed on the other side of the air passage relative to the blower fan in the axial direction, is formed so as to cover the other side of the blower fan in the axial direction, and forms, between the cover portion (26a) and the inner wall, a passage passage (130) that allows the air blown out from the blower fan to flow to the other side in the axial direction; at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; A blower device in which one axial end portion (270) of the at least one swirling flow suppression portion is formed so as to move toward one side in the axial direction as it progresses from the radial inner side to the radial outer side. [Claim 3] Among the axial ends (270) of the at least one swirling flow suppression portion, an end located most inward in the radial direction is defined as a radially inner end (272); Among the ends in the axial direction of the at least one swirling flow suppression portion, an end located most outside in the radial direction is defined as a radially outer end portion (271), When the axial distance between the radially inner end and the radially outer end is defined as an axial distance (dDR), 3. The blower device according to claim 1, wherein the at least one swirling flow suppressing portion comprises a plurality of swirling flow suppressing portions including two or more swirling flow suppressing portions each having a different axial distance. [Claim 4] A blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) that is disposed on the other side of the air passage relative to the blower fan in the axial direction, is formed so as to cover the other side of the blower fan in the axial direction, and forms, between the cover portion (26a) and the inner wall, a passage passage (130) that allows the air blown out from the blower fan to flow to the other side in the axial direction; at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; A blower device in which the other end (270A) of the at least one swirling flow suppression portion in the rotational direction is formed so as to move toward one side in the rotational direction as it progresses from the inner side in the radial direction to the outer side in the radial direction. [Claim 5] A blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) that is disposed on the other side of the air passage relative to the blower fan in the axial direction, is formed so as to cover the other side of the blower fan in the axial direction, and forms, between the cover portion (26a) and the inner wall, a passage passage (130) that allows the air blown out from the blower fan to flow to the other side in the axial direction; at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; A blower device in which the other end (270A) of the at least one swirling flow suppression portion in the rotational direction is formed so as to move toward the other side in the rotational direction as it progresses from the inner side in the radial direction to the outer side in the radial direction. [Claim 6] Among the ends (270A) in the rotation direction of the at least one swirl flow suppression portion, an end portion located most inward in the radial direction is defined as a radially inner end portion (274); Among the ends in the rotation direction of the at least one swirling flow suppression portion, an end located most outside in the radial direction is defined as a radially outer end portion (273), When the distance in the rotational direction between the radially inner end portion and the radially outer end portion is defined as a rotational distance (dDk), 6. The blower device according to claim 4, wherein the at least one swirling flow suppressing portion comprises a plurality of swirling flow suppressing portions including two or more swirling flow suppressing portions whose rotational distances are different from each other. [Claim 7] A blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in the air from one side in the axial direction and blow the air outward in a radial direction about the axis, where the blower fan (201) is defined as an axial direction (DRa) in which an axis (CL1) extends; a cover portion (26a) that is disposed on the other side of the air passage relative to the blower fan in the axial direction, is formed so as to cover the other side of the blower fan in the axial direction, and forms, between the cover portion (26a) and the inner wall, a passage passage (130) that allows the air blown out from the blower fan to flow to the other side in the axial direction; at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; The at least one swirling flow suppression portion has a dimension (dDa) in a rotation direction (Ka1) of the blower fan that increases from the inner side in the radial direction to the outer side in the radial direction. [Claim 8] A blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in the air from one side in the axial direction and blow the air outward in a radial direction about the axis, where the blower fan (201) is defined as an axial direction (DRa) in which an axis (CL1) extends; a cover portion (26a) that is disposed on the other side of the air passage relative to the blower fan in the axial direction, is formed so as to cover the other side of the blower fan in the axial direction, and forms, between the cover portion (26a) and the inner wall, a passage passage (130) that allows the air blown out from the blower fan to flow to the other side in the axial direction; at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; The at least one swirling flow suppression portion has a dimension (dDa) in a rotation direction (Ka1) of the blower fan that becomes smaller from the inner side in the radial direction to the outer side in the radial direction. [Claim 9] When a direction that intersects the axial direction and the rotation direction (Ka1) of the blower fan and that increases from the other side of the axial direction to the one side as it moves from the other side of the axial direction to the one side is defined as an intersecting direction (Kd1), The at least one swirling flow suppression portion has an end surface (290) on one side in the rotation direction in the intersecting direction formed in a curved shape that is convex toward one side in the rotation direction in the intersecting direction, The air blower device according to any one of claims 1 to 8, further comprising an end face (291) on the other side of the rotational direction in the intersecting direction that is curved so as to be convex toward one side of the rotational direction in the intersecting direction. [Claim 10] the at least one swirling flow suppression portion is provided in the axial direction with an end surface (27a, 27b) that is formed along a rotation direction (Ka1) of the blower fan, A blower device as described in any one of claims 1 to 9, wherein the end face is formed so that a narrow angle (θ2, θ3) formed between the end face and a virtual plane (Sa) parallel to the rotation direction and perpendicular to the axial direction becomes smaller from the inside to the outside in the radial direction. [Claim 11] 11. The blower device according to claim 1, wherein the at least one swirling flow suppressing portion comprises a plurality of swirling flow suppressing portions arranged at intervals (Kn) in a circumferential direction about the axis. [Claim 12] 12. The blower device according to claim 11, wherein the plurality of swirl flow suppression portions are arranged in the circumferential direction so as to form at least two different intervals. [Claim 13] The blower device according to claim 11, wherein the plurality of swirling flow suppression portions are arranged so as to avoid overlapping of the shadows of the plurality of swirling flow suppression portions when projected from one side in the axial direction. [Claim 14] A blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) that is disposed on the other side of the air passage relative to the blower fan in the axial direction, is formed so as to cover the other side of the blower fan in the axial direction, and forms, between the cover portion (26a) and the inner wall, a passage passage (130) that allows the air blown out from the blower fan to flow to the other side in the axial direction; at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; the other end portion (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward the other side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, Furthermore, the blower device is configured such that one axial end portion (270) of the at least one swirling flow suppression portion is directed toward one side in the axial direction as it progresses from the radial inner side to the radial outer side. [Claim 15] A blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) that is disposed on the other side of the air passage relative to the blower fan in the axial direction, is formed so as to cover the other side of the blower fan in the axial direction, and forms, between the cover portion (26a) and the inner wall, a passage passage (130) that allows the air blown out from the blower fan to flow to the other side in the axial direction; at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; the other end portion (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward one side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, Furthermore, the blower device is configured such that one axial end portion (270) of the at least one swirling flow suppression portion is directed toward one side in the axial direction as it progresses from the radial inner side to the radial outer side. [Claim 16] A blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) that is disposed on the other side of the air passage relative to the blower fan in the axial direction, is formed so as to cover the other side of the blower fan in the axial direction, and forms, between the cover portion (26a) and the inner wall, a passage passage (130) that allows the air blown out from the blower fan to flow to the other side in the axial direction; at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; the other end portion (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward the other side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, A blower device in which one axial end portion (270) of the at least one swirling flow suppression portion is formed so as to move toward the other axial side as it progresses from the radial inner side to the radial outer side. [Claim 17] A blower device, an air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in the air from one side of the axial direction to one side of the rotation direction (Ka1) when the direction in which the axis (CL1) extends is defined as an axial direction (DRa); a cover portion (26a) that is disposed on the other side of the air passage relative to the blower fan in the axial direction, is formed so as to cover the other side of the blower fan in the axial direction, and forms, between the cover portion (26a) and the inner wall, a passage passage (130) that allows the air blown out from the blower fan to flow to the other side in the axial direction; at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction; the other end portion (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward one side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, A blower device in which one axial end portion (270) of the at least one swirling flow suppression portion is formed so as to move toward the other axial side as it progresses from the radial inner side to the radial outer side. [Explanation of symbols]

[0293] 10. Air conditioning unit for vehicles 12 Air conditioning case 12a inner wall 26 Rectification mechanism 26a Cover part 26b Swirl flow suppressor 100 Blower 123 Air passage 130 Passageway 201 Blower fan

Claims

1. A blower device, An air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis, when the direction in which the axis (CL1) extends is defined as an axial direction (DRa); a cover portion (26a) disposed on the other side of the air passage relative to the blower fan in the axial direction, formed to cover the other side of the blower fan in the axial direction, and forming a passage (130) between the cover portion and the inner wall for allowing the air blown out from the blower fan to flow to the other side in the axial direction; and at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction, A blower device in which one axial end (270) of at least one of the swirling flow suppression sections is formed so as to move toward the other axial side as it progresses from the radial inner side to the radial outer side.

2. A blower device, An air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis, when the direction in which the axis (CL1) extends is defined as an axial direction (DRa); a cover portion (26a) disposed on the other side of the air passage relative to the blower fan in the axial direction, formed to cover the other side of the blower fan in the axial direction, and forming a passage (130) between the cover portion and the inner wall for allowing the air blown out from the blower fan to flow to the other side in the axial direction; and at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction, A blower device in which one axial end (270) of at least one of the swirling flow suppression sections is formed so as to move toward one side in the axial direction as it progresses from the radial inside to the radial outside.

3. Among the axial ends (270) of the at least one swirling flow suppression portion, an end located most inward in the radial direction is defined as a radially inner end (272); Among the ends in the axial direction of the at least one swirling flow suppression portion, an end located most outside in the radial direction is defined as a radial outer end (271), The axial distance between the radially inner end and the radially outer end is defined as an axial distance (dDR), The blower device according to claim 1 or 2, wherein the at least one swirling flow suppressing portion is a plurality of swirling flow suppressing portions including two or more swirling flow suppressing portions each having a different axial distance.

4. A blower device, An air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) disposed on the other side of the air passage relative to the blower fan in the axial direction, formed to cover the other side of the blower fan in the axial direction, and forming a passage (130) between the cover portion and the inner wall for allowing the air blown out from the blower fan to flow to the other side in the axial direction; and at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction, A blower device in which the other end (270A) of the at least one swirling flow suppression portion in the rotational direction is formed so as to move toward one side in the rotational direction as it moves from the radial inside to the radial outside.

5. A blower device, An air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) disposed on the other side of the air passage relative to the blower fan in the axial direction, formed to cover the other side of the blower fan in the axial direction, and forming a passage (130) between the cover portion and the inner wall for allowing the air blown out from the blower fan to flow to the other side in the axial direction; and at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction, A blower device in which the other end (270A) of the at least one swirling flow suppression portion in the rotational direction is formed so as to move toward the other side in the rotational direction as it moves from the radial inside to the radial outside.

6. Among the ends (270A) in the rotation direction of the at least one swirling flow suppression portion, an end located most inward in the radial direction is defined as a radially inner end (274); Among the ends in the rotation direction of the at least one swirling flow suppression portion, an end located most outside in the radial direction is defined as a radially outer end portion (273), When the distance in the rotational direction between the radially inner end portion and the radially outer end portion is defined as a rotational distance (dDk), The blower device according to claim 4 or 5, wherein the at least one swirling flow suppressing portion is a plurality of swirling flow suppressing portions including two or more swirling flow suppressing portions having different rotational distances.

7. A blower device, An air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis, when the direction in which the axis (CL1) extends is defined as an axial direction (DRa); a cover portion (26a) disposed on the other side of the air passage relative to the blower fan in the axial direction, formed to cover the other side of the blower fan in the axial direction, and forming a passage (130) between the cover portion and the inner wall for allowing the air blown out from the blower fan to flow to the other side in the axial direction; and at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction, The at least one swirling flow suppression portion has a dimension (dDa) in a rotation direction (Ka1) of the blower fan that increases from the inner side in the radial direction to the outer side in the radial direction.

8. A blower device, An air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating about the axis to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis, when the direction in which the axis (CL1) extends is defined as an axial direction (DRa); a cover portion (26a) disposed on the other side of the air passage relative to the blower fan in the axial direction, formed to cover the other side of the blower fan in the axial direction, and forming a passage (130) between the cover portion and the inner wall for allowing the air blown out from the blower fan to flow to the other side in the axial direction; and at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction, The at least one swirling flow suppression portion has a dimension (dDa) in a rotation direction (Ka1) of the blower fan that becomes smaller from the inner side in the radial direction to the outer side in the radial direction.

9. When a direction that intersects the axial direction and the rotation direction (Ka1) of the blower fan and that moves from the other side of the axial direction to the one side as it moves from the other side of the axial direction to the one side is defined as an intersecting direction (Kd1), The at least one swirling flow suppression portion is formed in a curved shape such that one end surface (290) in the rotational direction in the intersecting direction is convex toward one side of the rotational direction in the intersecting direction, A blower device as described in any one of claims 1, 2, 4, 5, 7, and 8, further comprising: an end face (291) on the other side of the rotational direction in the intersecting direction, the end face being curved so as to be convex toward one side of the rotational direction in the intersecting direction.

10. the at least one swirling flow suppression portion has an end surface (27a, 27b) formed in the axial direction along the rotation direction (Ka1) of the blower fan, A blower device as described in any one of claims 1, 2, 4, 5, 7, and 8, wherein the end face is formed so that a narrow angle (θ2, θ3) formed between the end face and a virtual plane (Sa) parallel to the rotation direction and perpendicular to the axial direction becomes smaller from the inside to the outside in the radial direction.

11. The blower device according to claim 1 , wherein the at least one swirling flow suppressing portion is a plurality of swirling flow suppressing portions arranged at intervals (Kn) in a circumferential direction about the axis.

12. The blower device according to claim 11 , wherein the plurality of swirl flow suppression portions are arranged in the circumferential direction so as to form at least two different intervals.

13. The blower device according to claim 11, wherein the plurality of swirling flow suppression portions are provided so as to avoid overlapping of the shadows of the plurality of swirling flow suppression portions that are generated when the plurality of swirling flow suppression portions are projected from one side in the axial direction.

14. A blower device, An air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) disposed on the other side of the air passage relative to the blower fan in the axial direction, formed to cover the other side of the blower fan in the axial direction, and forming a passage (130) between the cover portion and the inner wall for allowing the air blown out from the blower fan to flow to the other side in the axial direction; and at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction, The other end portion (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward the other side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, Furthermore, the blower device is configured such that one axial end portion (270) of at least one of the swirling flow suppression portions is formed to move toward one side in the axial direction as it progresses from the radial inner side to the radial outer side.

15. A blower device, An air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) disposed on the other side of the air passage relative to the blower fan in the axial direction, formed to cover the other side of the blower fan in the axial direction, and forming a passage (130) between the cover portion and the inner wall for allowing the air blown out from the blower fan to flow to the other side in the axial direction; and at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction, The other end (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward one side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, Furthermore, the blower device is configured such that one axial end portion (270) of at least one of the swirling flow suppression portions is formed to move toward one side in the axial direction as it progresses from the radial inner side to the radial outer side.

16. A blower device, An air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) disposed on the other side of the air passage relative to the blower fan in the axial direction, formed to cover the other side of the blower fan in the axial direction, and forming a passage (130) between the cover portion and the inner wall for allowing the air blown out from the blower fan to flow to the other side in the axial direction; and at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction, The other end portion (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward the other side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, A blower device in which one axial end (270) of at least one of the swirling flow suppression sections is formed so as to move toward the other axial side as it progresses from the radial inner side to the radial outer side.

17. A blower device, An air conditioning case (12) having an inner wall (12a) that forms an air passage (123) through which air passes; a blower fan (201) disposed in the air passage and rotating on one side of a rotation direction (Ka1) about the axis (CL1) so as to draw in the air from one side of the axial direction and blow the air outward in a radial direction about the axis (DRa); a cover portion (26a) disposed on the other side of the air passage relative to the blower fan in the axial direction, formed to cover the other side of the blower fan in the axial direction, and forming a passage (130) between the cover portion and the inner wall for allowing the air blown out from the blower fan to flow to the other side in the axial direction; and at least one swirl flow suppressing portion (26b) that is disposed in the passage and is formed in the radial direction to suppress a swirl flow of the air generated by rotation of the blower fan and generate an air flow that flows on the other side in the axial direction, The other end (270A) of the at least one swirling flow suppression portion in the rotational direction is formed to move toward one side in the rotational direction as it moves from the inner side in the radial direction to the outer side in the radial direction, A blower device in which one axial end (270) of at least one of the swirling flow suppression sections is formed so as to move toward the other axial side as it progresses from the radial inner side to the radial outer side.

18. The air blower is a vehicle air blower for blowing air into a vehicle cabin, 17. The blower device according to claim 2, further comprising a heat exchanger arranged downstream of the swirl flow suppressing portion in the air passage to exchange heat with the air.

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