blower device

Abstract

A blower device has: a blower fan (201) arranged in an air duct (123) of an air conditioning housing (12) and designed to rotate about an axis (CL1) to draw in air from one side in an axial direction (DRa) and to blow the air out to a radially outer side in a radial direction around the axis; a cover (26a) arranged on the other side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and an inner wall (12a) of the air duct, which is designed to direct the air blown out by the blower fan to the other side in the axial direction;and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction. The at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan, thereby producing an airflow that flows to the other side in the axial direction. An end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed to extend to the other side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction.

Description

Cross-reference to related registration

[0001] The present application is based on the Japanese patent application JP 2023 - 060325 filed on April 3, 2023, the contents of which are hereby incorporated by reference. Technical field

[0002] The present disclosure relates to a blower device. Background of the state of the art

[0003] An earlier proposed blower device comprises: a blower fan arranged in an air duct of an air conditioning housing; and a plurality of turbulence suppression devices provided in the air duct to allow an airflow blown by the blower fan to pass through, see, for example, patent document 1. The blower fan draws in air from one side in the axial direction and blows the air out to a radial outside around an axis of the blower fan by rotating about that axis.

[0004] The eddy current suppression devices are arranged on the opposite side of the blower fan in the axial direction and form an air channel that allows the air blown by the blower fan to exit to the other side in the axial direction. The eddy current suppression devices suppress eddy currents generated by the rotation of the blower fan (blower impeller).

[0005] Accordingly, it is possible to avoid unevenness in the amount of air blown, which is caused by the turbulence created by the rotation of the blower fan. Therefore, it is not necessary to excessively restrict the design / arrangement of the air outlet to avoid unevenness in the amount of air blown. List of state-of-the-art patent documents

[0006] Patent document 1: JP 6747469 B2 Summary of the invention

[0007] The vortex suppression devices of the blower device disclosed in patent document 1 suppress the vortex flow of the airflow blown by the blower fan. However, according to the investigations of the inventors of the present application, since the high-speed vortex flow blown by the blower fan collides with the vortex suppression devices, noise is generated due to the collision.

[0008] Furthermore, according to the investigation of the inventors of the present application, in a case where a cover covering the blower fan from the other side in the axial direction is provided on the eddy flow suppression devices, an airflow channel is formed on a radially outer side of the cover.

[0009] In this case, the cross-sectional area (cross-sectional region) of a cross-section of the airflow duct will be smaller than the cross-sectional area of ​​a cross-section of an airflow duct on the downstream side, which is located on a downstream side of the vortex suppression devices in the air conditioning housing.

[0010] In this context, if a direction in which the main flow of the air flows in the airflow channel is defined as a main flow direction, the cross-section of the flow channel refers to a cross-section obtained by cutting the airflow channel along an imaginary plane that is perpendicular to the main flow direction.

[0011] Accordingly, since the air flows at high speed to the other side in the axial direction through the air duct, which is formed by the vortex flow suppression devices and has a small cross-sectional area, a high pressure loss occurs, and noise is generated.

[0012] With regard to the point explained above, it is an objective of the present disclosure to provide a blower device that reduces noise.

[0013] According to one aspect of the present disclosure, a blower device has been created which has the following features: an air conditioning housing having an inner wall, wherein the inner wall forms an air duct designed to conduct air; a blower fan arranged in the air duct, wherein a direction in which an axis of the blower fan extends is defined as an axial direction, and the blower fan is constructed to rotate about the axis in order to draw in air from one side in the axial direction and to blow the air outwards around the axis in a radial direction to a radially outer side; a cover arranged on another side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage between the cover and the inner wall, designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed such that a vortex flow of air generated by rotation of the blower fan is suppressed and thereby an airflow is generated which flows to the other side in the axial direction, wherein: an end section of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to the other side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction.

[0014] According to this aspect, when the vortex flow collides with the at least one vortex suppression device, the airflow velocity is reduced compared to a case where the at least one vortex suppression device is designed to extend from the radially inner side to the radially outer side. This allows for a reduction in the noise generated when the vortex flow collides with the at least one vortex suppression device.

[0015] Accordingly, it is possible to create a blower device that is designed to reduce noise.

[0016] Furthermore, according to another aspect, a blower device has been created which has the following features: an air conditioning housing having an inner wall, wherein the inner wall forms an air duct designed to conduct air; a blower fan arranged in the air duct, wherein a direction in which an axis of the blower fan extends is defined as an axial direction, and the blower fan is constructed to rotate about the axis in order to draw in air from one side in the axial direction and to blow the air about the axis in a radial direction to a radially outer side; a cover arranged on another side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage between the cover and the inner wall, designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section of one side of at least one vortex suppression device which points to one side in the axial direction, is designed such that it extends to one side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction.

[0017] According to this aspect, at least one vortex suppression device can generate the airflow in which the flow velocity of the air increases from the radially inner side to the radially outer side in the radial direction.

[0018] Furthermore, according to this aspect, it is possible to increase the difference between the airflow velocity on the radially inner side and the airflow velocity on the radially outer side in a flow velocity distribution of the airflow that has passed through the at least one vortex suppression device, compared to a case in which the at least one vortex suppression device is designed to extend from the radially inner side to the radially outer side.

[0019] Accordingly, an airflow can be generated on a downstream side of the at least one vortex suppression device, flowing from the radially outer side to a radially central side around the axis in the passage channel. This allows a reduction in the amount of airflow flowing from the passage channel to the other side in the axial direction.

[0020] Therefore, the noise generated when the airflow passes through the duct can be reduced. Accordingly, it is possible to create a blower device designed to reduce noise.

[0021] Furthermore, according to another aspect of the present disclosure, a blower device has been created which has the following features: an air conditioning housing having an inner wall, wherein the inner wall forms an air duct designed to conduct air; a blower fan arranged in the air duct, wherein a direction in which an axis of the blower fan extends is defined as an axial direction, and the blower fan is constructed such that it rotates to one side in a direction of rotation about the axis in order to draw in air from one side in the axial direction and to blow the air out around the axis in a radial direction to a radially outer side; a cover arranged on another side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage between the cover and the inner wall, designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section of the other side of the at least one vortex suppression device, which is directed towards the other side which is opposite to the one side in the direction of rotation, is designed such that it extends to the one side in the direction of rotation by extending the end section of the other side from a radially inner side to the radially outer side in the radial direction.

[0022] According to this aspect, when the vortex flow collides with the at least one vortex suppression device, the airflow velocity is reduced compared to a case where the at least one vortex suppression device is designed to extend from the radially inner side to the radially outer side. This allows for a reduction in the noise generated when the vortex flow collides with the at least one vortex suppression device. Accordingly, it is possible to create a blower device designed to reduce noise.

[0023] Furthermore, according to another aspect of the present disclosure, a blower device has been created which has the following features: an air conditioning housing having an inner wall, wherein the inner wall forms an air duct designed to conduct air; a blower fan arranged in the air duct, wherein a direction in which an axis of the blower fan extends is defined as an axial direction, and the blower fan is constructed such that it rotates to one side in a direction of rotation about the axis in order to draw in air from one side in the axial direction and to blow the air out around the axis in a radial direction to a radially outer side; a cover arranged on another side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage between the cover and the inner wall, designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section of the other side of the at least one vortex suppression device, which is directed towards the other side which is opposite to the one side in the direction of rotation, is designed such that it extends to the other side in the direction of rotation, with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction.

[0024] According to this aspect, the at least one vortex suppression device can generate an airflow in which the airflow velocity increases in the radial direction from the radially inner side to the radially outer side. Furthermore, according to this aspect, it is possible to increase the difference between the airflow velocity at the radially inner side and the airflow velocity at the radially outer side for a flow velocity distribution of the airflow that has passed through the at least one vortex suppression device, compared to a case in which the at least one vortex suppression device is configured to extend from the radially inner side to the radially outer side.

[0025] Accordingly, on the downstream side of the at least one vortex suppression device, an airflow can be generated that flows from the radially outer side to the radially middle side around the axis in the passage channel. This makes it possible to reduce the amount of airflow that flows from the passage channel to the other side in the axial direction.

[0026] Therefore, it is possible to reduce the noise generated when the airflow passes through the duct. Accordingly, it is possible to create a blower device designed to reduce noise.

[0027] Furthermore, according to another aspect of the present invention, a blower device has been created which has the following features: an air conditioning housing having an inner wall, wherein the inner wall forms an air duct designed to conduct air; a blower fan arranged in the air duct, wherein a direction in which an axis of the blower fan extends is defined as an axial direction, and the blower fan is constructed to rotate about the axis in order to draw in air from one side in the axial direction and to blow the air outwards around the axis in a radial direction to a radially outer side; a cover arranged on another side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage between the cover and the inner wall, designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: A dimension of the at least one vortex suppression device, measured in a direction of rotation of the blower fan, increases as the at least one vortex suppression device extends from a radially inner side to the radially outer side in the radial direction.

[0028] Therefore, according to this aspect, the amount of airflow passing through the radially outer side of the passage channel is reduced compared to a case where at least one vortex suppression device has a constant measure in the direction of rotation over the radial direction.

[0029] This makes it possible to reduce the noise generated when the airflow collides with the radially outer side of at least one turbulence suppression device. Therefore, the noise generated when the airflow passes through the passage can be reduced. Accordingly, it is possible to create a blower device designed to reduce noise.

[0030] Furthermore, according to another aspect of the present disclosure, a blower device has been created which has the following features: an air conditioning housing having an inner wall, wherein the inner wall forms an air duct designed to conduct air; a blower fan arranged in the air duct, wherein a direction in which an axis of the blower fan extends is defined as an axial direction, and the blower fan is constructed to rotate about the axis in order to draw in air from one side in the axial direction and to blow the air outwards around the axis in a radial direction to a radial outside; a cover arranged on another side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage between the cover and the inner wall, designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotating the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: A dimension of the at least one vortex suppression device, measured in a direction of rotation of the blower fan, decreases as the at least one vortex suppression device extends from a radial inside to the radial outside in the radial direction.

[0031] According to this aspect, at least one vortex suppression device can generate an airflow in which the airflow velocity increases from the radially inner side to the radially outer side. Furthermore, according to this aspect, the pressure drop of the airflow passing through the channel decreases from the radially inner side to the radially outer side.

[0032] Accordingly, it is possible to increase the difference between the airflow velocity on the radially inner side and the airflow velocity on the radially outer side in the airflow velocity distribution of the airflow that has passed through the at least one vortex suppression device, compared to the case in which the at least one vortex suppression device is designed to extend from the radially inner side to the radially outer side.

[0033] Accordingly, on the downstream side of at least one vortex suppression device, an airflow can be generated that flows from the radially outer side to the radially middle side around the axis in the passage channel. This allows a reduction in the amount of airflow that flows from the passage channel to the other side in the axial direction.

[0034] Therefore, it is possible to reduce the noise generated when the airflow passes through the duct. Accordingly, it is possible to create a blower device designed to reduce noise.

[0035] Furthermore, according to another aspect of the present disclosure, a blower device has been created which has the following features: an air conditioning housing having an inner wall, wherein the inner wall forms an air duct designed to conduct air; a blower fan arranged in the air duct, wherein a direction in which an axis of the blower fan extends is defined as an axial direction, and the blower fan is constructed such that it rotates to one side in a direction of rotation about the axis in order to draw in air from one side in the axial direction and to blow the air out around the axis in a radial direction to a radial outside; a cover arranged on the other side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage between the cover and the inner wall, designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section of the other side of the at least one vortex suppression device, which points to the other side opposite to one side in the direction of rotation, is designed such that it extends to the other side in the direction of rotation, with the end section of the other side extending from the radially inner side to the radially outer side in the radial direction; and an end section of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to one side in the axial direction, with the end section of one side extending from a radial inside to the radial outside in the radial direction.

[0036] Therefore, according to this aspect, the at least one vortex suppression device is designed such that it extends to the other side in the direction of rotation, extending from the radially inner side to the radially outer side in the radial direction. Therefore, as with the aspects described above, the at least one vortex suppression device can reduce the noise generated when the airflow passes through the passage.

[0037] Furthermore, according to this aspect, the at least one vortex suppression device is designed such that it extends axially to one side, extending from the radially inner side to the radially outer side. Therefore, as with the aspects described above, the noise generated when the airflow passes through the channel can be reduced. Accordingly, it is possible to create a blower device designed to reduce noise.

[0038] Furthermore, according to another aspect of the present invention, a blower device has been created which has the following features: an air conditioning housing having an inner wall, wherein the inner wall forms an air duct designed to conduct air; a blower fan arranged in the air duct, wherein a direction in which an axis of the blower fan extends is defined as an axial direction, and the blower fan is constructed such that it rotates to one side in a direction of rotation about the axis in order to draw in air from one side in the axial direction and to blow the air out around the axis in a radial direction to a radial outside; a cover arranged on another side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage between the cover and the inner wall, designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section of the other side of the at least one vortex suppression device, which points to the other side opposite to one side in the direction of rotation, is designed such that it extends to one side in the direction of rotation, with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction; and an end section of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to one side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction.

[0039] Therefore, according to this aspect, the at least one vortex suppression device is designed such that it extends to one side in the direction of rotation, extending from the radially inner side to the radially outer side in the radial direction. Therefore, as with the aspects described above, the noise generated when the vortex flow blown by the fan (fan impeller) collides with the at least one vortex suppression device can be reduced.Furthermore, according to this aspect, the at least one vortex suppression device is designed such that it extends axially to one side, extending from the radially inner side to the radially outer side. Therefore, as with the aspects described above, the noise generated when the airflow passes through the passage can be reduced.

[0040] Accordingly, it is possible to create a blower device that is designed in such a way that the noise is reduced.

[0041] Furthermore, according to another aspect of the present disclosure, a blower device has been created which has the following features: an air conditioning housing having an inner wall, wherein the inner wall forms an air duct designed to conduct air; a blower fan arranged in the air duct, wherein a direction in which an axis of the blower fan extends is defined as an axial direction, and the blower fan is constructed such that it rotates to one side in a direction of rotation about the axis in order to draw in air from one side in the axial direction and to blow the air out around the axis in a radial direction to a radially outer side; a cover arranged on the other side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage between the cover and the inner wall, designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device arranged in the passage channel and elongated in the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section of the other side of the at least one vortex suppression device, which faces the other side opposite to the one side in the direction of rotation, is designed such that it extends to the other side in the direction of rotation, with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction; and an end section of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to the other side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction.

[0042] Therefore, according to this aspect, the at least one vortex suppression device is designed such that it extends to the other side in the direction of rotation, extending from the radially inner side to the radially outer side in the radial direction. Therefore, as with the aspects described above, the noise generated when the airflow passes through the passage can be reduced.

[0043] Furthermore, according to this aspect, the at least one vortex suppression device is designed such that it extends axially to the other side, extending from the radially inner side to the radially outer side. Therefore, as with the aspects described above, the noise generated when the vortex flow blown by the fan (fan impeller) collides with the at least one vortex suppression device can be reduced. Accordingly, it is possible to create a fan device designed to reduce noise.

[0044] Furthermore, according to another aspect of the present disclosure, a blower device has been created which has the following features: an air conditioning housing having an inner wall, wherein the inner wall forms an air duct designed to conduct air; a blower fan arranged in the air duct, wherein a direction in which an axis of the blower fan extends is defined as an axial direction, and the blower fan is constructed such that it rotates to one side in a direction of rotation about the axis in order to draw in air from one side in the axial direction and to blow the air out around the axis in a radial direction to a radially outer side; a cover arranged on the other side in the axial direction with respect to the blower fan in the air duct and designed to cover the blower fan from the other side in the axial direction, the cover forming a passage between the cover and the inner wall, designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section of the other side of the at least one vortex suppression device, which points to the other side opposite to one side in the direction of rotation, is designed such that it extends to one side in the direction of rotation, with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction; and an end section of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to the other side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction.

[0045] Therefore, according to this aspect, the at least one vortex suppression device is designed such that it extends to one side in the direction of rotation, extending from the radially inner side to the radially outer side in the radial direction. Therefore, as with the aspect described above, the noise generated when the vortex flow blown by the fan (fan impeller) collides with the at least one vortex suppression device can be reduced.

[0046] Furthermore, according to this aspect, the at least one vortex suppression device is designed such that the at least one vortex suppression device extends to the other side in the axial direction, extending from the radially inner side to the radially outer side in the radial direction.

[0047] Therefore, as with the aspects described above, the noise generated when the swirling flow blown by the fan (fan impeller) collides with the at least one swirl suppression device can be reduced. Accordingly, it is possible to create a fan device designed to reduce noise.

[0048] Reference symbols in parentheses added to each component show an example of a correspondence between the component and a specific component described in the embodiments discussed below. Brief description of the drawings Fig. Figure 1 shows a cross-sectional view of a vehicle air conditioning unit assembly according to a first embodiment along an imaginary plane parallel to an upward and downward direction of the vehicle and comprising a blower axis, wherein the view is provided to illustrate an assembly relationship between an air conditioning housing, a blower and a flow straightening mechanism. Fig. Figure 2 shows a cross-sectional view along a line II-II in Fig. 1, wherein this view is provided to support an explanation of a plurality of vortex suppression devices and a cover that forms the flow straightening mechanism in the first embodiment. Fig. Figure 3 shows a cross-sectional view of a blower fan and the flow straightening mechanism according to the one described in Fig. 1 first embodiment shown along an imaginary plane encompassing the fan axis, the view being provided in such a way as to support an explanation of the plurality of vortex suppression devices and the cover that forms the flow straightening mechanism. Fig. Figure 4 shows a view to support an explanation of the variety of vortex suppression devices that implement the flow straightening mechanism according to the one described in Fig. 1 first embodiment shown, wherein the view shows a state in which the flow straightening mechanism is optically illuminated by a light source from one side in its axial direction. Fig. Figure 5 shows a cross-sectional view of a blower fan and a flow straightening mechanism according to a second embodiment along an imaginary plane comprising a fan axis, the view being provided to support an explanation of a plurality of eddy flow suppression devices and a cover forming the flow straightening mechanism. Fig. 6 shows one Fig. 2. A corresponding cross-sectional view of a flow straightening mechanism according to a third embodiment along a vertical plane parallel to a fan axis, wherein the view is provided to support an explanation of a plurality of vortex flow suppression devices and a cover. Fig. Figure 7 shows a cross-sectional view along a line VII-VII in Fig. 6, wherein the view is provided to assist in an explanation of a front guide and a rear guide which form the vortex suppression device. Fig. Figure 8 shows a cross-sectional view along a line VIII-VIII in Fig. 6, wherein the view is provided to assist in an explanation of the front guide and the rear guide that form the vortex suppression device. Fig. Figure 9 shows a cross-sectional view along a line IX-IX in Fig. 6, wherein the view is provided to assist in an explanation of the front guide and the rear guide that form the vortex suppression device. Fig. Figure 10 shows a view to support an explanation of an acute angle between a Fig. The end surface shown in section 7 and an imaginary plane are defined. Fig. Figure 11 shows a view to support an explanation of an acute angle between the in Fig. The end surface shown in section 8 and an imaginary plane are defined. Fig. Figure 12 shows a view to support an explanation of an acute angle between the in Fig. The end surface shown in 9 is defined by an imaginary plane. Fig. Figure 13 shows a cross-sectional view of a flow straightening mechanism according to a fourth embodiment along an imaginary plane encompassing the fan axis, the view supporting an explanation of a plurality of vortex flow suppression devices and a cover forming the flow straightening mechanism. Fig. Figure 14 shows a cross-sectional view along a line XIV-XIV in Fig. 13, wherein the view supports an explanation of a measure of the vortex suppression device measured in a direction of rotation. Fig. Figure 15 shows a cross-sectional view along a line XV-XV in Fig. 13, wherein the view supports an explanation of a dimension of the vortex suppression device measured in the direction of rotation. Fig. Figure 16 shows a cross-sectional view along a line XVI-XVI in Fig. 13, wherein the view supports an explanation of a dimension of the vortex suppression device measured in the direction of rotation. Fig. Figure 17 shows a cross-sectional view of a flow straightening mechanism according to a fifth embodiment along an imaginary plane encompassing the fan axis, the view supporting an explanation of a plurality of vortex flow suppression devices and a cover forming the flow straightening mechanism. Fig. Figure 18 shows a cross-sectional view of a flow straightening mechanism according to a sixth embodiment along an imaginary plane encompassing the fan axis, the view supporting an explanation of a plurality of vortex flow suppression devices, a reinforcing ring and a cover forming the flow straightening mechanism. Fig. Figure 19 shows a cross-sectional view of a vortex suppression device from a plurality of vortex suppression devices forming a flow straightening mechanism according to a seventh embodiment, wherein the view is along an imaginary plane parallel to both the direction of rotation and the fan axial direction and supports an explanation of one form of the vortex suppression device. Fig. Figure 20 shows a cross-sectional view of a flow straightening mechanism according to an eighth embodiment along an imaginary plane parallel to both the fan axial direction and the radial direction, the view supporting an explanation of the shape of the vortex flow suppression device. Fig. Figure 21 shows a cross-sectional view of part of a flow straightening mechanism according to an eighth embodiment along an imaginary plane encompassing the fan axis, the view supporting an explanation of a flow velocity of an airflow that has passed through the vortex flow suppression device and of an airflow flowing from a radially outer side to a radially inner side. Fig. Figure 22 shows a cross-sectional view of part of a flow straightening mechanism in a comparative example to the eighth embodiment along an imaginary plane encompassing the fan axis, the view supporting an explanation of a flow velocity of an airflow that has passed through the vortex flow suppression device and an airflow flowing from the radially outer side to the radially inner side. Fig. Figure 23 shows a cross-sectional view of a flow straightening mechanism according to a ninth embodiment along an imaginary plane parallel to both the fan axial direction and the radial direction, the view supporting an explanation of a form of vortex flow suppression device. Fig. Figure 24 shows a cross-sectional view of a flow straightening mechanism according to a tenth embodiment along an imaginary plane encompassing the fan axis, the view supporting an explanation of a plurality of vortex flow suppression devices and a cover forming the flow straightening mechanism. Fig. Figure 25 shows a cross-sectional view of a flow straightening mechanism according to an eleventh embodiment along an imaginary plane encompassing the fan axis, the view supporting an explanation of a plurality of vortex flow suppression devices and a cover forming the flow straightening mechanism. Fig. Figure 26 shows a cross-sectional view of a flow straightening mechanism according to a twelfth embodiment along an imaginary plane encompassing the fan axis, the view supporting an explanation of a plurality of vortex flow suppression devices and a cover forming the flow straightening mechanism. Fig. Figure 27 shows a cross-sectional view along a line XXVII-XXVII in Fig. 26 according to the twelfth embodiment, wherein the view supports an explanation of a dimension of the eddy flow suppression device measured in the direction of rotation. Fig. Figure 28 shows a cross-sectional view along a line XXVIII-XXVIII in Fig. 26 according to the twelfth embodiment, wherein the view supports an explanation of a dimension of the eddy flow suppression device measured in the direction of rotation. Fig. Figure 29 shows a cross-sectional view along a line XXIX-XXIX in Fig. 26 according to the twelfth embodiment, wherein the view supports an explanation of a dimension of the eddy flow suppression device measured in the direction of rotation. Fig. Figure 30 shows a perspective view of an eddy flow suppression device from a plurality of eddy flow suppression devices according to a thirteenth embodiment viewed from the other side in the direction of rotation, wherein the view supports an explanation of the eddy flow suppression device which is designed in a forward extending form and a forward inclined form, wherein a dotted line shows a comparative example of the eddy flow suppression device. Fig. Figure 31 shows a perspective view to support an explanation of the vortex suppression device of the thirteenth embodiment, wherein a dotted line shows a comparative example of the vortex suppression device. Fig. Figure 32 shows a perspective view of a single vortex suppression device from a plurality of vortex suppression devices according to a fourteenth embodiment viewed from the other side in the direction of rotation, wherein the view supports an explanation of the vortex suppression device which is designed in a rearward extending form and a forward inclined form, wherein a dashed line shows a comparative example of the vortex suppression device. Fig. Figure 33 shows a perspective view to support an explanation of the vortex suppression device according to the fourteenth embodiment, wherein a dashed line shows a comparative example of the vortex suppression device. Fig. Figure 34 shows a perspective view of a single vortex suppression device from a plurality of vortex suppression devices according to a fifteenth embodiment viewed from the other side in the direction of rotation, wherein the view supports an explanation of the vortex suppression device having a rearward-facing shape and a forward-inclined shape, wherein a dashed line shows a comparative example of the vortex suppression device. Fig. Figure 35 shows a perspective view to support an explanation of the vortex suppression device according to the fifteenth embodiment, wherein a dashed line shows a comparative example of the vortex suppression device. Fig. Figure 36 shows a perspective view of an eddy flow suppression device from a plurality of eddy flow suppression devices according to a sixteenth embodiment viewed from the other side in the direction of rotation, wherein the view supports an explanation of the eddy flow suppression device which has a rearward-facing shape and a forward-inclined shape, wherein a dashed line shows a comparative example of the eddy flow suppression device. Fig. Figure 37 shows a perspective view to support an explanation of the vortex suppression device according to the sixteenth embodiment, wherein a dashed line shows a comparative example of the vortex suppression device. Description of the exemplary implementations

[0049] Exemplary embodiments of the present disclosure are described below with reference to the drawings. For the sake of simplicity, the same reference numerals have been assigned to sections that are identical or equivalent in the respective exemplary embodiments below. First embodiment

[0050] As this is in Fig. As shown in Figure 1, a vehicle air conditioning unit (vehicle air conditioning system) 10 of the present embodiment has an air conditioning housing 12, an evaporator 16, a heating element core 18, an electric blower 20, a plurality of doors 21, 22, 23, 24a, 24b, 25 and a flow straightening mechanism 26.

[0051] The vehicle air conditioning unit 10, for example, is located inside a dashboard positioned at the front of a vehicle cabin. Arrows DR1, DR2 in Fig. Figure 1 shows an orientation of a vehicle in which the vehicle air conditioning unit 10 is mounted.

[0052] That means the DR1 arrow in Fig. Arrow 1 indicates a vehicle front-back direction (a direction pointing forward and backward) DR1, and arrow DR2 indicates a vehicle up-down direction (a direction pointing upward and downward) DR2. These directions DR1 and DR2 are intersecting directions, and more precisely, directions that are perpendicular to each other.

[0053] The air conditioning housing 12 is a plastic element that forms an outer casing for the vehicle air conditioning unit 10. The air conditioning housing 12 has an external air inlet 121, an internal air inlet 122, and discharge ports (dispensing openings) 126, 127, 128 for dispensing air from the inside of the air conditioning housing 12.

[0054] An internal air duct 123 is formed inside the air conditioning housing 12, and the internal air duct 123 directs the air from either the external air inlet 121 or the internal air inlet 122 or from both to each of the discharge ports 126, 127, 128. The internal air duct 123 is designed to extend in the front-to-rear direction DR1 of the vehicle.

[0055] The outside air inlet 121 is an inlet for introducing outside air, which is air from the outside of the vehicle cabin, into the housing's internal air duct 123. The inside air inlet 122 is an inlet for introducing inside air, which is air from inside the vehicle cabin, into the housing's internal air duct 123. The outside air and / or the inside air are introduced into the air conditioning housing 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. The air, introduced from either the outside air inlet 121 or the inside air inlet 122 or from both, then flows into the evaporator 16.

[0057] The evaporator 16 is a cooling heat exchanger that cools the air passing through it. More precisely, the evaporator 16 is a cooling device.

[0058] The evaporator 16 is housed in the air conditioning housing 12. That is, the evaporator 16 is arranged in the housing's internal air duct 123 and is positioned such that the outside air or the internal air introduced into the housing's internal air duct 123 flows into the evaporator 16.

[0059] The evaporator 16, together with a compressor, a condenser, and an expansion valve (not shown), forms a known refrigeration cycle device that circulates a refrigerant. The evaporator 16 causes heat exchange between the air passing through it and the refrigerant, causing the refrigerant to evaporate and cool the air.

[0060] The electric blower 20 comprises the following: a blower fan (blower impeller) 201, which is arranged in the housing's inner air duct 123 and rotates about a fan axis CL1; and an electric motor (not shown) that drives the blower fan 201 in a rotating manner. The blower fan 201 is a centrifugal fan in the present embodiment.

[0061] This means that the electric blower 20 is a centrifugal blower that draws in air from one side in a fan axial direction DRa of the fan axis CL1 by rotating the blower fan (blower fan wheel) 201 and blows the drawn-in air out to a radially outer side in a radial direction Kc1 of the blower fan (blower fan wheel) 201.

[0062] Here, the air blown by the electric blower 20 towards the radially outer side in the radial direction Kc1 is guided through the air conditioning housing 12 to a downstream side of the housing's inner air duct 123 in a direction of airflow, as indicated by an arrow FLf (for example, towards the rear of the vehicle in Fig. 1) The fan axial direction DRa is a direction in which the fan axis (fan wheel axis) CL1 extends.

[0063] More precisely, the electric blower 20 has a fan air inlet 201a and a fan air outlet 201b. The fan air inlet 201a is an inlet located on one side in the fan axial direction DRa of the fan axis CL1 with respect to the blower fan 201, to draw in air. The fan air outlet 201b is an outlet formed around the entire circumference of an outer circumferential section centered on the fan axis CL1 with respect to the blower fan 201, to blow the air out.

[0064] The blower fan 201 draws in air from one side in the fan axial direction DRa through the fan air inlet 201a when the blower fan (blower fan wheel) 201 is rotated around the fan axis CL1.

[0065] Together with this, the blower fan 201 blows the intake air from the fan air outlet 201b to the radially outer side in the radial direction Kc1 of the blower fan 201 around the fan axis CL1.

[0066] In the housing inner air duct 123 of the air conditioning housing 12, a fan ambient space 123b, into which the air blown by the blower fan 201 flows, is formed on a radially outer side of the blower fan 201 in the radial direction Kc1 around the fan axis CL1.

[0067] The fan ambient space 123b is provided between an inner wall 12a of the air conditioning housing 12, which forms the housing inner air duct 123, and the blower fan 201.

[0068] The air conditioning housing 12 of the present embodiment is constructed in such a way that it directs the air blown by the blower fans 201 into the fan environment space 123b to the other side, which is opposite to one side in the fan axial direction DRa.

[0069] For example, an airflow guidance wall (not shown) is provided in the air conditioning housing 12 on one side of the fan environment 123b in the fan axial direction DRa. In the air conditioning housing 12, the airflow guidance wall directs the air in the fan environment 123b such that the air flows to the other side in the fan axial direction DRa, while preventing the air from flowing to one side in the fan axial direction DRa.

[0070] As a result, the air blown by the blower fan 201 to its radially outer side in the radial direction Kc1 enters the fan ambient chamber 123b, as indicated by the arrow FLf. The air is then guided through the air conditioning housing 12 from the fan ambient chamber 123b to the other side of the blower fan 201 in the fan axial direction DRa.

[0071] The fan axial direction DRa of the fan axis CL1 coincides with the vehicle front-to-rear direction DR1 in the present embodiment. The fan axial direction DRa of the fan axis CL1 is also simply referred to as the fan axial direction DRa. The radial direction Kc1 of the blower fan 201 is a radial direction Kc1 around the fan axis (fan wheel axis) CL1.

[0072] The electric blower 20 has a so-called suction layout (suction contour) in which the blower fan 201 is arranged on the downstream side of the evaporator 16 in the direction of airflow. The electric blower 20 is arranged such that one side of the electric blower 20, which points towards one side in the fan axial direction DRa and is an air inlet side of the blower fan 201, faces an air outlet surface 16b of the evaporator 16.

[0073] Accordingly, the blower fan 201 is arranged such that a side opposite the blower fan 201, which points to the other side in the fan axial direction DRa of the fan axis CL1 and is opposite to one side in the fan axial direction DRa, is directed towards the downstream side in the airflow direction in the housing inner air duct 123.

[0074] The heating element core 18 is located on the downstream side of the blower fan 201 in the direction of airflow within the housing's internal air duct 123. The heating element core 18 is positioned on a central section that is centered within the housing's internal air duct 123 in the vehicle's top-bottom direction DR2. The heating element core 18 is a heating device that heats the air passing through it from the air flowing through the housing's internal air duct 123.

[0075] In the air conditioning housing 12, an upper bypass channel 125a is formed on the upper side of the heating element core 18, and a lower bypass channel 125b is formed on a lower side of the heating element core 18. The upper bypass channel 125a and the lower bypass channel 125b are each enclosed in the housing's internal air duct 123 and allow the air to flow parallel to the heating element core 18.

[0076] This means that both the upper bypass channel 125a and the lower bypass channel 125b are bypass channels that allow air to flow while bypassing the heating device core 18.

[0077] An air mixing door 24a and an air mixing door 24b are arranged on the upstream side of the heating device core 18 in the direction of airflow within the housing inner air duct 123. The air mixing doors 24a, 24b are provided on the downstream side of the flow straightening mechanism 26 in the direction of airflow.

[0078] In other words, the air mixing doors 24a, 24b are located on the other side of the flow straightening mechanism 26 in the fan axial direction DRa. The heating element core 18 and the bypass channels 125a, 125b are located on the other side of the air mixing doors 24a, 24b in the fan axial direction DRa.

[0079] The air mixing door 24a is located in the upper bypass duct 125a and opens and closes the upper bypass duct 125a. The air mixing door 24a is a sliding door mechanism and slides by an electric actuator (not shown), i.e., it is caused to slide by this actuator.

[0080] The air mixing door 24a establishes an air flow ratio between the amount of air flow passing through the heating device core 18 and the amount of air flow passing through the upper bypass channel 125a, according to a sliding position of the air mixing door 24a.

[0081] The air mixing door 24b is located in the lower bypass duct 125b and opens and closes the lower bypass duct 125b. The air mixing door 24b is a sliding door mechanism and slides by an electric actuator (not shown), i.e., it is caused to slide by this actuator.

[0082] The air mixing door 24b establishes an air flow quantity ratio between the quantity of air flow passing through the heating device core 18 and the quantity of air flow passing through the lower bypass duct 125b, according to a sliding position of the air mixing door 24b.

[0083] The air conditioning housing 12 has a face discharge port 126, a defrost discharge port 127 and a foot discharge port 128 for discharging air to the outside of the air conditioning housing 12.

[0084] The face dispensing port 126, the defrost dispensing port 127 and the foot dispensing port 128 are each connected to the housing inner air duct 123 on the downstream side of the heating device core 18 and the bypass duct 125a, 125b in the direction of airflow.

[0085] The air delivered from face outlet 126 is routed through a duct (not shown) and blown towards the face or chest area of ​​an occupant seated in a front seat in the vehicle cabin. The air delivered from defrost outlet 127 is routed through a duct (not shown) and blown towards the front windshield of the vehicle in the cabin. The air delivered from foot outlet 128 is routed through a duct (not shown) and blown towards the feet of the occupant seated in the front seat in the vehicle cabin.

[0086] A face door 21 is provided at the face dispensing port 126, and the face door 21 opens and closes the face dispensing port 126. A defrost door 22 is provided at the defrost dispensing port 127, and the defrost door 22 opens and closes the defrost dispensing port 127. A foot door 23 is provided at the foot dispensing port 128, and the foot door 23 opens and closes the foot dispensing port 128.

[0087] The warm air that has passed through the heating element core 18 and the cool air that has passed through the upper bypass duct 125a are mixed on the downstream side of the heating element core 18 in the direction of airflow in the housing inner air duct 123. The mixed air is then blown into the vehicle cabin mainly through the respective ports open from the face vent port 126 and the defrost vent port 127.

[0088] Furthermore, the warm air blown from the heating unit core 18 and the cool air that has entered through the lower bypass duct 125b are mixed in the direction of airflow on the downstream side of the heating unit core 18. Additionally, when the footwell outlet 128 is open, the mixed air is blown into the vehicle cabin primarily from the footwell outlet 128.

[0089] As this is in Fig. As shown in Figure 1, the flow straightening mechanism 26 is arranged in the direction of airflow in the housing inner air duct 123 on the downstream side of the blower fan 201 and on the upstream side of the heating device core 18 and the air mixing doors 24a, 24b.

[0090] Accordingly, the air blown by the blower fan 201 flows into the flow straightening mechanism 26, and then the blown air flows to the bypass channels 125a, 125b or the heating device core 18 after passing through the flow straightening mechanism 26.

[0091] Here, the blower fan 201 is arranged such that the side of the blower fan 201 which points to the other side in the fan axial direction DRa is directed towards the downstream side of the airflow in the housing inner air duct 123.

[0092] The flow straightening mechanism 26 of the present embodiment suppresses a vortex flow generated by the rotation of the blower fan (blower impeller) 201, thereby producing an airflow that flows to the other side in the fan axial direction DRa. The vortex flow is an airflow that swirls around the fan axis (impeller axis) CL1. More precisely, as shown in Fig. 2 shows the flow straightening mechanism 26, a cover 26a and a variety of vortex suppression devices 26b.

[0093] The cover 26a is shaped in a circular plate form, which covers the blower fan 201 from the other side in the fan axial direction DRa. A passage 130 is formed between the cover 26a and the inner wall 12a of the air conditioning housing 12. The passage 130 forms part of the housing's internal air duct 123.

[0094] As this is in Fig. As shown in Figure 2, the vortex suppression devices 26b are arranged between the cover 26a and the inner wall 12a. The vortex suppression devices 26b are arranged at intervals (spaces) in a circumferential direction around the fan axis CL1.

[0095] A radially outer end section of each of the vortex suppression devices 26b, pointing towards an outside in the radial direction Kc1, is connected to the inner wall 12a. A radially inner end section of each of the vortex suppression devices 26b, pointing towards an inside in the radial direction Kc1, is connected to the cover 26a. The vortex suppression devices 26b divide the through-channel 130 into a plurality of sub-channels 130a.

[0096] In the flow straightening mechanism 26 of the present embodiment, the number of vortex flow suppression devices 26b is eight, and thus the number of sub-channels 130a formed by the vortex flow suppression devices 26b is eight.

[0097] The sub-channels 130a are designed such that the circumferential distance (distance in the circumferential direction) increases from the radially inner side to the radially outer side in the radial direction Kc1. The vortex suppression devices 26b suppress the vortex flow passing through the sub-channels 130a and generate an airflow that flows to the other side in the fan axial direction DRa.

[0098] For the sake of simplicity, below an interval (distance) between corresponding adjacent two of the vortex suppression devices 26b is referred to as an interval (distance) Kn, as shown in Fig. Figure 2 shows that the vortex suppression devices 26b of the present embodiment are arranged circumferentially such that two or more of the intervals Kn differ from one another. For example, the flow straightening mechanism 26 is designed such that the intervals Kn of the eight sub-channels 130a are different from one another.

[0099] As a result, the frequencies of the noise generated when the eddy flow is guided through the eddy flow suppression devices 26b are scattered (distributed). As this is shown in Fig. As shown in Figure 3, the vortex suppression devices 26b are each designed in a rearwardly inclined form such that the vortex suppression devices 26b extend to the other side in the fan axial direction DRa, with the vortex suppression device 26b extending from the radially inner side to the radially outer side in the radial direction Kc1.

[0100] In each of the vortex suppression devices 26b, an end surface 270 (serving as an end section of one side) is formed on one side of the vortex suppression device 26b in the fan axial direction DRa and is elongated along the radial direction Kc1. The end surface 270 of each of the vortex suppression devices 26b is designed such that the end surface 270 extends to the other side in the fan axial direction DRa, extending from the radially inner side to the radially outer side in the radial direction Kc1.

[0101] An end section of each end surface 270 located on the radially outermost side in the radial direction Kc1 of the end surface 270 is defined as a radial outer end section 271. An end section of each end surface 270 located on the radially innermost side in the radial direction Kc1 of the end surface 270 is defined as a radial inner end section 272.

[0102] Here, a distance between the radially outer end section 271 and the radially inner end section 272 - measured in the fan axial direction DRa - is defined as an axial distance dDR.

[0103] The vortex suppression devices 26b of the present embodiment comprise at least two vortex suppression devices 26b whose axial distances dDR are different from one another. For example, the vortex suppression devices 26b are designed such that the axial distances dDR of all vortex suppression devices 26b are different from one another.

[0104] As a result, the frequencies of the noise generated when the eddy flow is passed through the eddy flow suppression devices 26b are scattered (distributed).

[0105] As this is in Fig. As shown in Figure 4, the flow straightening mechanism 26 is constructed such that when light from a light source 300 is radiated onto the flow straightening mechanism 26 from one side in the fan axial direction DRa, shadows cast by the vortex flow suppression devices 26b onto a wall 301 are offset from one another.

[0106] This means that the flow straightening mechanism 26 is designed in such a way as to avoid an overlap of the shadows cast by the vortex flow suppression devices 26b when the flow straightening mechanism 26 is optically irradiated (projected) by light from the light source 300 on one side of the vortex flow suppression device 26b in the fan axial direction DRa.

[0107] This design allows the flow straightening mechanism 26, which is a molded product made of a plastic or metal material, to be easily removed from a mold (e.g., casting mold) by moving the mold to either one side or the other in the fan axial direction DRa during injection molding.

[0108] Fig. Figure 4 shows an example in which the light source 300 is arranged on one side of the flow straightening mechanism 26 in the fan axial direction DRa, and the wall 301 is arranged on the other side of the flow straightening mechanism 26 in the fan axial direction DRa.

[0109] In the present embodiment, the flow straightening mechanism 26, the blower fan 201 and the air conditioning housing 12 form the blower device 100.

[0110] The operation of the vehicle air conditioning unit 10 is described below.

[0111] First, when the operation of the electric blower 20 starts, as described in Fig. As shown in Figure 1, air is introduced into the housing inner air duct 123, which is formed in the air conditioning housing 12, through either the outside air inlet 121 or the inside air inlet 122. The air introduced into the housing inner air duct 123 is cooled by the evaporator 16 as it passes through it.

[0112] The air cooled by the evaporator 16 is drawn into the blower fan 201 of the electric blower 20, is blown out to the radially outer side of the blower fan 201 in the radial direction Kc1 and is introduced into the fan ambient space 123b.

[0113] Accordingly, the air introduced into the fan environment space 123b is guided to the flow straightening mechanism 26 through the air conditioning housing 12.

[0114] The air guided from the fan environment space 123b to the flow straightening mechanism 26 comprises the vortex flow generated by the rotation of the blower fan (blower impeller) 201. In the vortex flow, the airflow velocity increases from the radially inner side to the radially outer side in the radial direction Kc1 around the fan axis CL1.

[0115] The vortex flow from the fan environment space 123b collides with each of the vortex suppression devices 26b of the flow straightening mechanism 26. At this time, each of the vortex suppression devices 26b suppresses the vortex flow and thereby generates the airflow that flows to the other side in the fan axial direction DRa.

[0116] In this case, as described above, the vortex suppression devices 26b are each designed in the rearward inclined form such that the end surface 270 of each vortex suppression device 26b extends to the other side in the fan axial direction DRa, with the vortex suppression device 26b extending from the radially inner side to the radially outer side in the radial direction Kc1.

[0117] Accordingly, in the present embodiment, compared to a comparative example in which a plurality of vortex suppression devices 26b are designed to extend linearly in the radial direction Kc1, the flow velocity of the vortex flow that collides with the vortex suppression devices 26b can be reduced.

[0118] Thus, in comparison to the vortex suppression devices 26b of the comparison example described above, noise can be reduced which is generated when the vortex flow collides with (or collides with) the multitude of vortex suppression devices 26b.

[0119] Furthermore, in the case of the comparative example, in which the eddy flow suppression device 26b is arranged at equal intervals in the circumferential direction, the frequency of the noise that is generated when the eddy flow collides with the plurality of eddy flow suppression devices 26b is limited to a narrow frequency range.

[0120] In contrast, the eddy flow suppression devices 26b of the present embodiment are arranged circumferentially such that the intervals Kn of these eddy flow suppression devices 26b are different from one another. Accordingly, compared to the comparative example in which the eddy flow suppression devices 26b are arranged at the same intervals circumferentially, the present embodiment can extend (broaden) the frequency range of the noise that is generated when the eddy flow collides with the eddy flow suppression devices 26b.

[0121] Furthermore, the eddy flow suppression devices 26b of the present embodiment are designed such that the axial distances dDR of all eddy flow suppression devices 26b to each other are different. Therefore, in comparison to the comparative example in which the eddy flow suppression devices 26b are designed to extend linearly in the radial direction Kc1, the frequency range of the noise generated when the eddy flow collides with the eddy flow suppression devices 26b can be extended (made wider).

[0122] In this way, the turbulent flow is guided through the turbulence suppression devices 26b and flows to the other side in the fan axial direction DRa. The air flowing to the other side in the fan axial direction DRa becomes warm air after passing through the heating element core 18 and flowing to the downstream side of the heating element core 18 in the airflow direction. In contrast, the air flowing to the other side in the fan axial direction DRa remains cool (cold) air after passing through the bypass channels 125a, 125b and flowing to the downstream side of the heating element core 18 in the airflow direction.

[0123] The warm air and the cool air are then mixed together on the downstream side of the heating unit core 18 in the direction of airflow, and the mixed air is blown into a predetermined area of ​​the vehicle cabin to which any of the face vent 126, the defrost vent 127 and / or the foot vent 128 is open.

[0124] According to the embodiment described above, the vehicle air conditioning unit 10 comprises the air conditioning housing 12, which has the inner wall 12a that forms the housing inner air duct 123, which is designed to guide the air.

[0125] The vehicle air conditioning unit 10 includes the blower fan (blower fan wheel) 201, which is arranged in the housing inner air duct 123 and is designed to rotate around the fan axis CL1 to draw in air from one side in the fan axial direction DRa and to blow the air out to the radially outer side in the radial direction Kc1 around the fan axis CL1.

[0126] The vehicle air conditioning unit 10 includes the cover 26a, which is arranged on the other side in the fan axial direction DRa with respect to the blower fan 201 in the housing inner air duct 123 and is designed to cover the blower fan 201 from the other side in the fan axial direction DRa.

[0127] The cover 26a forms the passage 130 between the cover 26a and the inner wall 12a of the air conditioning housing 12, which is designed to direct the air blown out by the blower fan 201 to the other side in the fan axial direction DRa.

[0128] The vehicle air conditioning unit 10 comprises the vortex suppression devices 26b, which are arranged in the passage 130 and which are each elongated along the radial direction Kc1 around the fan axis CL1. Each of the vortex suppression devices 26b is designed to suppress the vortex flow of the air generated by the rotation of the blower fan (blower impeller) 201 and thereby generates the airflow that flows to the other side in the fan axial direction DRa.

[0129] The end surface 270 of each of the vortex suppression devices 26b is designed such that it extends to the other side in the fan axial direction DRa, with the end surface 270 extending from the radially inner side to the radially outer side in the radial direction Kc1 around the fan axis CL1.

[0130] Therefore, according to the present embodiment, in comparison to the case in which the vortex suppression devices 26b are designed to extend linearly from the radially inner side to the radially outer side in the radial direction Kc1, the flow velocity of the vortex flow that collides with the vortex suppression devices 26b can be reduced.

[0131] As a result, the noise generated when the air blown by the blower fan device 201 collides with the eddy flow suppression devices 26b can be reduced. Accordingly, a blower device 100 can be created that is designed to reduce the noise.

[0132] In the vehicle air conditioning unit 10 according to the present embodiment, which is constructed as described above, the following advantages (a), (b) and (c) are achieved. (a) The vortex suppression devices 26b of the present embodiment are arranged circumferentially around the fan axis CL1 such that the intervals (distances) Kn of all vortex suppression devices 26b are different from one another. Therefore, the frequencies of the noise generated when the vortex flow passes through the vortex suppression devices 26b can be diffused. Accordingly, the inconvenience caused to the user by the noise can be reduced. (b) The vortex suppression devices 26b are designed such that the axial distances dDR of all vortex suppression devices 26b are different from each other. The axial distance dDR is the distance between the radially outer end section 271 and the radially inner end section 272, measured in the fan axial direction DRa. Therefore, the frequencies of the noise generated when the air collides with the vortex suppression devices 26b can be dispersed. Accordingly, the discomfort caused to the user by the noise can be reduced. (c) The vortex suppression devices 26b are arranged in such a way as to avoid an overlap of the respective shadows of the vortex suppression devices 26b that are generated when the vortex suppression devices 26b are optically projected (irradiated) from one side in the fan axial direction DRa.

[0133] As a result, when the flow straightening mechanism 26 is injection molded, it becomes possible to easily free the molded flow straightening mechanism (a molded object) 26 from the mold (casting mold) by moving the mold to one side or the other in the fan axial direction DRa. Second embodiment

[0134] In a flow straightening mechanism 26 of the second embodiment, an example is given with reference to Fig. 5 described, wherein each of the vortex suppression devices 26b of the flow straightening mechanism 26 of the first embodiment is formed in a curved shape which is convex to one side in the fan axial direction DRa.

[0135] Fig. Figure 5 shows a cross-sectional view of the blower fan and the flow straightening mechanism according to the present embodiment along an imaginary plane encompassing the fan axis.

[0136] According to the exemplary embodiment described above, each of the vortex suppression devices 26b is designed in a curved shape that is convex on one side in the fan axial direction DRa. Accordingly, a blower device 100 can be created that is designed to further reduce the noise. Third example

[0137] In the third embodiment, with reference to the Fig. 6, Fig. 7, Fig. 8, Fig. 9 to Fig. 10 an example is described in which an inclination angle of each of the end surfaces (axial end surfaces) 27a, 27b of each vortex suppression device 26b of the first embodiment decreases from the radially inner side to the radially outer side in the radial direction Kc1.

[0138] The present embodiment differs from the first embodiment described above only in the design of the eddy flow suppression devices 26b. Accordingly, the following description focuses mainly on the design of the eddy flow suppression devices 26b.

[0139] Fig. Figure 6 shows a cross-sectional view of the flow straightening mechanism 26 of the present embodiment along an imaginary plane perpendicular to the fan axis CL1. Fig. Figure 7 shows a cross-sectional view along a line VII-VII in Fig. 6. Fig. Figure 8 shows a cross-sectional view along a line VIII-VIII in Fig. 6, and Fig. Figure 9 shows a cross-sectional view along a line IX-IX in Fig. 6. The Fig. 7, Fig. 8 and Fig. Figure 9 shows cross-sectional views of one vortex suppression device 26b from the plurality of vortex suppression devices 26b.

[0140] Fig. Figure 7 shows a cross-sectional view of a section of the vortex suppression device 26b, which is located on the radially outer side of the in Fig. 8 cross-section shown in the radial direction Kc1 is located. Fig. Figure 8 shows a cross-sectional view of a section of the vortex suppression device 26b, which is located on the radially outer side of the in Fig. 9 shown cross-section in the radial direction Kc1.

[0141] Each of the vortex suppression devices 26b comprises a front guide 280 and a rear guide 281, as shown in the Fig. 7, Fig. 8 and Fig. 9 is shown.

[0142] The front guide 280 is elongated along the direction of rotation Ka1 of the blower fan (blower impeller) 201. The rear guide 281 is designed such that it extends from an end section of the front guide 280, which faces one side in the direction of rotation Ka1, to the other side in the fan axial direction DRa.

[0143] The front guide 280 of the present embodiment is designed such that it extends to the other side in the fan axial direction DRa, extending from the radially inner side to the radially outer side in the radial direction Kc1. As a result, each of the vortex suppression devices 26b is designed in a rearwardly inclined shape such that the vortex suppression device 26b extends to the other side in the fan axial direction DRa, extending from the radially inner side to the radially outer side in the radial direction Kc1 around the fan axis CL1.

[0144] The front guide 280 is designed such that an axis AZ1 of the front guide 280 intersects a reference line KJ1. The axis AZ1 is an imaginary line indicating an axis of the front guide 280. The reference line KJ1 is an imaginary line that is perpendicular to both the fan axial direction DRa and the radial direction Kc1 and that is parallel to the direction of rotation Ka1.

[0145] As this is shown in the Fig. 7, Fig. 8 and Fig. As shown in Figure 9, the front guide 280 is designed such that an acute angle θ1, defined between the axis AZ1 and the reference line KJ1, decreases as the front guide 280 extends from the radially inner side to the radially outer side in the radial direction Kc1. The acute angle refers to an angle greater than 0° and less than 180°.

[0146] Each of the vortex suppression devices 26b has two end faces 27a, 28a, which point to one side in the fan axial direction DRa. Furthermore, each of the vortex suppression devices 26b has two end faces 27b, 28b, which point to the other side in the fan axial direction DRa.

[0147] The end surface 27a is arranged on one side of the end surface 28a in the direction of rotation Ka1. The end surface 27a is designed such that it extends from the end of one side of the inner surface 28a, which points towards one side in the direction of rotation Ka1, to that side in the direction of rotation Ka1.

[0148] The end surface 27b is arranged on one side of the end surface 28b in the direction of rotation Ka1. The end surface 27b is configured such that it extends from one end of the one side of the end surface 28b, which points towards the one side in the direction of rotation Ka1, to the other side in the direction of rotation Ka1. The end surface 27a of each of the vortex suppression devices 26b is configured such that it extends to the other side in the fan axial direction DRa, with the end surface 27a extending from the radially inner side to the radially outer side in the radial direction Kc1 around the fan axis CL1.

[0149] The Fig. 10, Fig. 11 and Fig. Figures 12 each show an acute angle θ2 defined between an imaginary plane Sa and the end surface 27a, and an acute angle θ3 defined between the imaginary plane Sa and the end surface 27b. Fig. Figure 10 shows the acute angle θ2, which is formed between the end surface 27a and the imaginary plane Sa in Fig. 7 is defined, and the acute angle θ3, which is between the end surface 27b and the imaginary plane Sa in Fig. 7 is defined. The imaginary plane Sa is a plane that is parallel to the direction of rotation Ka1 and parallel to the fan axial direction DRa.

[0150] Fig. Figure 11 shows the acute angle θ2, which is formed between the end surface 27a and the imaginary plane Sa in Fig. 8 is defined, and the acute angle θ3, which is between the end surface 27b and the imaginary plane Sa in Fig. 8 is defined. Fig. Figure 12 shows the acute angle θ2, which is formed between the end surface 27a and the imaginary plane Sa in Fig. 9 is defined, and the acute angle θ3, which is between the end surface 27b and the imaginary plane Sa in Fig. 9 is defined.

[0151] In the front-side guide 280 of each of the vortex suppression devices 26b of the present embodiment, each of the end surfaces 27a, 27b is inclined such that the acute angle θ2, θ3 (i.e. the angle of inclination) decreases as the end surface 27a, 27b extends from the radially inner side to the radially outer side in the radial direction Kc1.

[0152] According to the embodiment described above, each of the vortex suppression devices 26b is designed in the rearward inclined form such that the vortex suppression device 26b extends to the other side in the fan axial direction DRa, extending from the radially inner side to the radially outer side in the radial direction Kc1 around the fan axis CL1.

[0153] Therefore, as in the first embodiment, the noise generated when the air blown by the blower fan 201 collides with the eddy flow suppression devices 26b can be reduced. Accordingly, the blower device 100 can be provided in such a way as to reduce the noise.

[0154] In the present embodiment, in each of the vortex suppression devices 26b, every acute angle θ2, θ3 defined between the imaginary plane Sa and the corresponding end surface 27a, 27b decreases from the radially inner side to the radially outer side in the radial direction Kc1. Accordingly, the pressure loss of the vortex flow caused by the end surfaces 27a, 27b decreases from the radially inner side to the radially outer side in the radial direction Kc1.

[0155] In this case, the vortex flow has a higher velocity on the radially outer side in the radial direction Kc1 than on the radially inner side in the radial direction Kc1. Accordingly, by reducing the pressure loss caused by the vortex flow on the radially outer side in the radial direction Kc1, the overall pressure loss can be efficiently reduced. Fourth embodiment

[0156] In the first embodiment described above, an example is described in which the dimension of each of the vortex suppression devices 26b, which is measured in the direction of rotation Ka1, is uniform over the entire circumference of the vortex suppression device 26b in the radial direction Kc1.

[0157] Instead, the fourth embodiment presents an example with reference to the Fig. 13, Fig. 14, Fig. 15 and Fig. 16 described, in which a dimension dDa of each of the vortex suppression devices 26b, measured in the direction of rotation Ka1, increases as the vortex suppression device 26b extends from the radially inner side to the radially outer side in the radial direction Kc1.

[0158] Fig. Figure 13 shows a cross-sectional view of the flow straightening mechanism 26 of the present embodiment along an imaginary plane perpendicular to the fan axis CL1, and Fig. Figure 14 shows a cross-sectional view along a line XIV-XIV in Fig. 13. Fig. Figure 15 shows a cross-sectional view along a line XV-XV in Fig. 13, and Fig. Figure 16 shows a cross-sectional view along a line XVI-XVI Fig. 13.

[0159] The Fig. 14, Fig. 15 and Fig. Figure 16 shows cross-sectional views of one of the vortex suppression devices 26, and Fig. Figure 14 shows a cross-sectional view of a section of the vortex suppression device 26b, which is located on the radially outer side of the in Fig. 15 cross-section shown in the radial direction Kc1 is located. Fig. Figure 15 shows a cross-sectional view of a section of the vortex suppression device 26b, which is located on the radially outer side of the in Fig. 16 shown cross-section in the radial direction Kc1 is located.

[0160] According to the embodiment described above, the dimension dDa of each of the vortex suppression devices 26b, measured in the direction of rotation Ka1, increases along the radial extension of the vortex suppression device 26b from the radially inner side to the radially outer side in the radial direction Kc1. The dimension dDa is a dimension between the end surface 275A and the end surface 275B of each of the vortex suppression devices 26b.

[0161] End surface 275A is an end surface of the vortex suppression device 26b, which points to the other side in the direction of rotation Ka1. End surface 275B is an end surface of the vortex suppression device 26b, which points to one side in the direction of rotation Ka1.

[0162] Therefore, in comparison to the first embodiment described above, the pressure loss that occurs when the airflow passes through the sub-channels 130a increases from the radially inner side to the radially outer side in the radial direction Kc1.

[0163] Accordingly, in comparison to the first embodiment described above, the amount of airflow flowing in the radial direction Kc1 in the sub-channels 130a on the radially outer side can be reduced.

[0164] As a result, the noise generated when the vortex flow, which flows in the radial direction Kc1 on the radially outer side, collides with the vortex suppression devices 26b can be reduced. Accordingly, the blower device 100 can be created which is designed to reduce the noise. Fifth embodiment

[0165] In the first embodiment described above, an example is described in which each of the vortex suppression devices 26b extends in the radial direction Kc1.

[0166] Instead, in the fifth embodiment, with reference to Fig. 17 an example is described in which each of the vortex suppression devices 26b is designed such that it extends to one side in the direction of rotation Ka1, with the vortex suppression device 26b extending from the radially inner side to the radially outer side in the radial direction Kc1.

[0167] Fig. Figure 17 shows a cross-sectional view of the flow straightening mechanism 26 of the present embodiment along an imaginary plane perpendicular to the fan axis CL1. A dotted line in Fig. Figure 17 shows a comparative example in which a large number of vortex suppression devices 26b are designed to extend linearly in the radial direction Kc1.

[0168] In the present embodiment, the vortex suppression devices 26b are each designed in a rearwardly extending shape such that the vortex suppression device 26b moves forward to one side in the direction of rotation Ka1, extending from the radially inner side to the radially outer side in the radial direction Kc1. In the present embodiment, each of the vortex suppression devices 26b has an end surface (serving as an end section on the other side) 270A on the other side of the vortex suppression device 26b in the direction of rotation Ka1 of the blower fan 201 and is elongated along the radial direction Kc1.

[0169] The vortex suppression devices 26b are each configured such that the end surface 270A of each vortex suppression device 26b extends to one side in the direction of rotation Ka1, with the end surface 270A extending from the radially inner side to the radially outer side in the radial direction Kc1. Therefore, in comparison to the comparison example where the vortex suppression devices 26b are configured to extend linearly from the radially inner side to the radially outer side in the radial direction Kc1, the flow velocity of the vortex flow colliding with the vortex suppression devices 26b can be reduced.

[0170] As a result, the noise generated when the air blown by the blower fan 201 collides with the eddy flow suppression devices 26b can be reduced. Accordingly, the blower device 100 can be created which is designed to reduce the noise.

[0171] An end section of each end surface 270A located radially on the outermost side in the radial direction Kc1 at the end surface 270A is defined as a radially outer end section 273. An end section of each end surface 270A located radially furthest inward in the radial direction Kc1 at the end surface 270A is defined as a radially inner end section 274.

[0172] Here, a distance between the radially outer end section 273 and the radially inner end section 274, measured in the direction of rotation Ka1, is defined as a rotational distance dDk.

[0173] The eddy flow suppression devices 26b of the present embodiment comprise at least two eddy flow suppression devices 26b whose rotational distances dDk are different from each other. For example, the eddy flow suppression devices 26b are configured such that the rotational distances dDk of all eddy flow suppression devices 26b are different from each other.

[0174] As a result, the frequencies of the noise generated when the eddy flow collides with the eddy flow suppression devices 26b are diffused. Accordingly, any discomfort caused to the user by the noise can be reduced. Sixth embodiment

[0175] In the sixth embodiment, with reference to Fig. 18 describes an example in which a reinforcing ring 29 is added to the flow straightening mechanism 26 of the fifth embodiment. Fig. Figure 18 shows a cross-sectional view of the flow straightening mechanism 26 of the present embodiment along an imaginary plane perpendicular to the fan axis CL1.

[0176] In the flow straightening mechanism 26 of the present embodiment, all of the vortex suppression devices 26b are coupled to one another by the reinforcing ring 29. The reinforcing ring 29 is formed in a ring shape that is centered on the fan axis CL1. As a result, the strength of the vortex suppression devices 26b can be improved. Seventh embodiment

[0177] In the seventh embodiment, with reference to Fig. 19 an example is described in which each of the vortex flow suppression devices 26b of the flow straightening mechanism 26 of the first embodiment is designed in a curved shape.

[0178] As this is in Fig. As shown in Figure 19, each of the vortex suppression devices 26b is formed in a curved shape that is convex in an inclination direction Kd1 towards one side in the direction of rotation Ka1. The inclination direction Kd1 is a cutting direction that intersects both the direction of rotation Ka1 and the fan axial direction DRa. More precisely, the inclination direction Kd1 is a cutting direction that is perpendicular to both the direction of rotation Ka1 and the fan axial direction DRa.

[0179] The inclination direction Kd1 is defined such that the inclination direction Kd1 is directed from the other side to the one side in the direction of rotation Ka1, advancing the inclination direction Kd1 from the other side to the one side in the fan axial direction DRa.

[0180] Each of the vortex suppression devices 26b has an end surface 270B on one side of the vortex suppression device 26b in the inclination direction Kd1, which corresponds to one side of the vortex suppression device 26b in the direction of rotation Ka1. Each of the vortex suppression devices 26b has an end surface 270A on the other side of the vortex suppression device 26b in the inclination direction Kd1, which corresponds to the other side of the vortex suppression device 26b in the direction of rotation Ka1.

[0181] The end surface 270B and the end surface 270A are each formed in a curved shape, which is convex in the inclination direction Kd1 to one side in the rotation direction Ka1.

[0182] According to the embodiment described above, each of the vortex suppression devices 26b is designed such that each of the end surfaces 270B, 270A of the vortex suppression device 26b extends to the other side in the fan axial direction DRa, with the end surface 270B, 270A extending from the radially inner side to the radially outer side in the radial direction Kc1 around the fan axis CL1. The end surface 270A of each of the vortex suppression devices 26b is formed in a curved shape, which is convex in the inclination direction Kd1 to one side in the rotation direction Ka1.

[0183] The end surface 270B of each of the vortex flow suppression devices 26b is formed in a curved shape that is convex in the inclination direction Kd1 towards one side in the rotation direction Ka1. Accordingly, the pressure loss that occurs when the airflow passes through the flow straightening mechanism 26 can be reduced. Accordingly, the blower device 100 can be designed to further reduce noise. Eighth example

[0184] In the first embodiment described above, an example is described in which each of the vortex suppression devices 26b is designed such that it extends to the other side in the fan axial direction DRa, with the vortex suppression device 26b extending from the radially inner side to the radially outer side in the radial direction Kc1.

[0185] Instead, the eighth embodiment provides an example with reference to the Fig. 20, Fig. 21 and Fig. 22 described, in which each of the vortex suppression devices 26b is designed such that it extends to one side in the fan axial direction DRa, with the vortex suppression device 26b extending from the radially inner side to the radially outer side in the radial direction Kc1.

[0186] Fig. Figure 20 shows a cross-sectional view of the flow straightening mechanism 26 of the present embodiment along an imaginary plane encompassing the fan axis CL1. Dotted lines in Fig. Figure 20 shows a comparative example in which a large number of vortex suppression devices 26b are designed such that they extend linearly in the radial direction Kc1.

[0187] Fig. Figure 21 shows a view of the cover 26a and one of the vortex flow suppression devices 26b in the flow straightening mechanism 26 of the present embodiment, also showing a flow velocity Za of the air flowing from the lower channels 130a to the other side in the fan axial direction DRa.

[0188] Fig. Figure 22 shows a representation of a flow velocity Za of the air flowing from the sub-channels 130a to the other side in the fan axial direction DRa in a comparative example, in which the vortex flow suppression devices 26b extend linearly from the radially inner side to the radially outer side in the radial direction Kc1.

[0189] Each of the vortex suppression devices 26b can suppress the vortex flow and thereby generate the airflow that flows to the other side in the fan axial direction DRa.

[0190] In vortex flow, the airflow velocity increases from the radially inner side to the radially outer side in the radial direction Kc1. Accordingly, the vortex flow suppression devices 26b of the present embodiment can generate the airflow in which the airflow velocity increases from the radially inner side to the radially outer side in the radial direction Kc1.

[0191] According to the present embodiment, the vortex suppression devices 26b are each designed in a forward-inclined shape such that the vortex suppression device 26b extends to one side in the fan axial direction DRa, extending from the radially inner side to the radially outer side in the radial direction Kc1. The end surface 270 of each of the vortex suppression devices 26b is designed such that the end surface 270 extends to one side in the fan axial direction DRa, extending from the radially inner side to the radially outer side in the radial direction Kc1.

[0192] Accordingly, in the passage channel 130, which is located on the downstream side of the vortex suppression devices 26b in the direction of airflow, a difference between the flow velocity of the air flowing on the radially outer side and the flow velocity of the air flowing on the radially inner side can be made greater than in the comparative example described above.

[0193] Accordingly, an airflow is generated in the through-duct 130 (in each of the sub-ducts 130a) that flows from the radially outer side to the radially middle side around the fan axis CL1, as indicated by an arrow Qz. Thus, the amount of airflow flowing from the through-duct 130 (i.e., from the sub-ducts 130a) to the other side in the fan axial direction DRa can be reduced.

[0194] Accordingly, the noise generated when air flows from the through channel 130 to the other side in the fan axial direction DRa can be reduced. Accordingly, the blower device 100 can be designed to reduce the noise.

[0195] In the present embodiment, it is similar to the first embodiment described above, as is the case in Fig. As shown in Figure 20, in each of the vortex suppression device 26b the end surface 270 is formed on one side of the vortex suppression device 26b in the fan axial direction DRa and is elongated along the radial direction Kc1.

[0196] An end section of each end surface 270, which is located radially furthest out in the radial direction Kc1 on the end surface 270, is defined as a radially outer end section 271.

[0197] An end section of each end surface 270, located radially furthest inwards in the radial direction Kc1 at the end surface 270, is defined as a radially inner end section 272. Here, a distance between the radially outer end section 271 and the radially inner end section 272, measured in the fan axial direction DRa, is defined as an axial distance dGR.

[0198] The vortex suppression devices 26b of the present embodiment comprise at least two vortex suppression devices 26b whose axial distances dDR from each other are different. For example, the vortex suppression devices 26b are designed such that the axial distances dDR of all vortex suppression devices 26b from each other are different.

[0199] As a result, the frequencies of the noise generated when the eddy flow passes through the eddy flow suppression devices 26b are dispersed. Accordingly, any discomfort caused to the user by the noise can be reduced. Ninth embodiment

[0200] In the ninth embodiment, with reference to Fig. 23 an example is described in which each of the vortex suppression devices 26b of the eighth embodiment is formed in a curved shape which is convex to the other side in the fan axial direction DRa.

[0201] Fig. Figure 23 shows a cross-sectional view of the flow straightening mechanism 26 of the present embodiment along an imaginary plane parallel to the fan axis CL1.

[0202] According to the exemplary embodiment described above, each of the vortex flow suppression devices 26b is designed in a curved shape that is convex on the other side in the fan axial direction DRa. This reduces the pressure loss that occurs when the air blown by the blower fan 201 passes through the flow straightening mechanism 26. Accordingly, the blower device 100 can be designed to further reduce noise. Tenth embodiment

[0203] In the fifth embodiment described above, an example is described in which the end surface 270A of each of the vortex suppression devices 26b is designed such that it extends to one side in the direction of rotation Ka1, with the end surface 270A extending from the radially inner side to the radially outer side in the radial direction Kc1.

[0204] Instead, the tenth embodiment provides an example with reference to Fig. 24 described, wherein the end surface 270A of each of the vortex suppression devices 26b is designed such that it extends to the other side in the direction of rotation Ka1, with the end surface 270A extending from the radially inner side to the radially outer side in the radial direction Kc1.

[0205] Fig. Figure 24 shows a cross-sectional view of the flow straightening mechanism 26 of the present embodiment along an imaginary plane perpendicular to the fan axis CL1. Dotted lines in Fig. Figure 24 shows a comparative example in which a large number of vortex suppression devices 26b are designed such that they extend linearly in the radial direction Kc1.

[0206] Each of the vortex suppression devices 26b can suppress the vortex flow and thereby generate the airflow that flows to the other side in the fan axial direction DRa.

[0207] In vortex flow, the airflow velocity increases from the radially inner side to the radially outer side in the radial direction Kc1. Accordingly, the vortex flow suppression devices 26b of the present embodiment can generate the airflow in which the airflow velocity increases from the radially inner side to the radially outer side in the radial direction Kc1.

[0208] In the present embodiment, the vortex suppression devices 26b are each designed such that the end surface 270A of each vortex suppression device 26b extends to the other side in the direction of rotation Ka1, with the end surface 270A extending from the radially inner side to the radially outer side in the radial direction Kc1.

[0209] Accordingly, in the passage channel 130, which is located on the downstream side of the vortex suppression devices 26b in the direction of airflow, the difference between the flow velocity of the air flowing on the radially outer side and the flow velocity of the air flowing on the radially inner side can be made greater than in the comparative example described above.

[0210] Accordingly, similar to the eighth embodiment, an airflow is generated in each of the sub-channels 130a, flowing from the radially outer side to the radially inner side around the fan axis CL1. This reduces the amount of airflow that flows from the through-channel 130 (i.e., from the sub-channels 130a) to the other side in the fan axial direction DRa.

[0211] Accordingly, the noise generated when air flows from the through channel 130 to the other side in the fan axial direction DRa can be reduced. Accordingly, the blower device 100 can be designed to reduce the noise.

[0212] In the present embodiment, similar to the fifth embodiment, an end surface (which serves as an end section of the other side) 270A is formed on the other side of the eddy flow suppression device 26b in the direction of rotation Ka1 of the blower fan (blower fan wheel) 201 and is elongated along the radial direction Kc1.

[0213] An end section of each end surface 270A that is located radially furthest outwards in the radial direction Kc1 on the end surface 270A is defined as a radially outer end section 273. An end section of each end surface 270A that is located radially furthest inwards in the radial direction Kc1 on the end surface 270A is defined as a radially inner end section 274.

[0214] Here, a distance between the radially outer end section 273 and the radially inner end section 274, measured in the direction of rotation Ka1, is defined as a rotational distance dDk.

[0215] The eddy flow suppression devices 26b of the present embodiment comprise at least two eddy flow suppression devices 26b whose rotational distances dDk are different from each other. For example, the eddy flow suppression devices 26b are configured such that the rotational distances dDk of all eddy flow suppression devices 26b are different from each other.

[0216] As a result, similar to the fifth embodiment, the frequencies of the noise generated when the eddy flow collides with the eddy flow suppression devices 26b are diffused. Accordingly, any inconvenience caused to the user by the noise can be reduced. Eleventh embodiment

[0217] In the eleventh embodiment, with reference to Fig. 25 an example is described in which each of the vortex suppression devices 26b of the flow straightening mechanism 26 of the tenth embodiment is formed in a curved shape which is convex to one side in the direction of rotation Ka1.

[0218] Fig. Figure 25 shows a cross-sectional view of the flow straightening mechanism 26 of the present embodiment along an imaginary plane perpendicular to the fan axis CL1.

[0219] According to the embodiment described above, each of the vortex suppression devices 26b is designed in a curved shape that is convex on one side in the direction of rotation Ka1. Accordingly, the pressure loss that occurs when the airflow passes through the flow straightening mechanism 26 can be reduced.

[0220] Accordingly, the blower device 100 can be created, which is designed to reduce the noise even further. Twelfth embodiment

[0221] In the fourth embodiment, an example is described in which the dimension measured in the direction of rotation Ka1 of each of the vortex suppression devices 26b increases as the vortex suppression device 26b extends from the radially inner side to the radially outer side in the radial direction Kc1. Instead, in the twelfth embodiment, with reference to the Fig. 26, Fig. 27, Fig. 28 and Fig. 29 an example is described in which the dimension dDa measured in the direction of rotation Ka1 of each of the vortex suppression devices 26b decreases under extension of the vortex suppression device 26b from the radially inner side to the radially outer side in the radial direction Kc1.

[0222] Fig. Figure 26 shows a cross-sectional view of the flow straightening mechanism 26 of the present embodiment along the imaginary plane that is perpendicular to the fan axis CL1. Fig. Figure 27 shows a cross-sectional view along a line XXVII-XXVII in Fig. 26. Fig. Figure 28 shows a cross-sectional view along a line XXVIII-XXVIII in Fig. 26, and Fig. Figure 29 shows a cross-sectional view along a line XXIX-XXIX in Fig. 26. In Fig. 26 denote the same reference symbols as those used in Fig. Thirteen of the same components were used, and a detailed description of them is omitted.

[0223] The Fig. 27, Fig. 28 and Fig. Figures 29 are cross-sectional views of one of the vortex suppression devices 26b, and Fig. Figure 27 shows a cross-sectional view of a section of the vortex suppression device 26b, which is located on the radially outer side of the in Fig. 28 shows the cross-section in the radial direction Kc1. Fig. Figure 28 shows a cross-sectional view of a section of the vortex suppression device 26b, which is located on the radially outer side of the in Fig. 29 shows the cross-section in the radial direction Kc1.

[0224] According to the embodiment described above, each of the vortex suppression devices 26b can suppress the vortex flow and thereby generate the airflow that flows to the other side in the fan axial direction DRa.

[0225] In vortex flow, the airflow velocity increases from the radially inner side to the radially outer side in the radial direction Kc1. Accordingly, the vortex flow suppression devices 26b of the present embodiment can generate the airflow in which the airflow velocity increases from the radially inner side to the radially outer side in the radial direction Kc1.

[0226] The dimension dDa of each of the vortex suppression devices 26b, measured in the direction of rotation Ka1, decreases along the extension of the vortex suppression device 26b from the radially inner side to the radially outer side in the radial direction Kc1. The dimension dDa is a dimension between the end surface 275A and the end surface 275B of each of the vortex suppression devices 26b, measured in the direction of rotation Ka1. Therefore, the dimension of each of the sub-channels 130a, measured in the direction of rotation Ka1, decreases along the extension of the sub-channel 130a from the radially inner side to the radially outer side in the radial direction Kc1.

[0227] Therefore, the pressure loss that occurs when the airflow passes through the sub-channel 130a decreases from the radially inner side to the radially outer side in the radial direction Kc1.

[0228] Accordingly, in the passage 130, which is located on the downstream side of the vortex suppression devices 26b in the direction of airflow, the difference between the flow velocity of the air flowing on the radially outer side and the flow velocity of the air flowing on the radially inner side can be greater than in a comparative example described below. The comparative example refers to an example in which a plurality of vortex suppression devices 26b are configured to extend linearly in the radial direction Kc1.

[0229] As a result, similar to the eighth and tenth embodiments described above, the airflow can be generated which flows from the radially outer side to the radially middle side in the radial direction Kc1 within the sub-channels 130a on the downstream side of the vortex suppression devices 26b.

[0230] This reduces the amount of airflow traveling from the sub-ducts 130a to the other side in the axial direction. Consequently, the noise generated when the airflow passes through the sub-ducts 130a can be reduced. Thirteenth embodiment

[0231] In the flow straightening mechanism 26 of the thirteenth embodiment, with reference to the Fig. 30 and Fig. 31 an example is described in which a mechanism is used which combines the vortex suppression devices 26b of the tenth embodiment, each of which has the forward-extending shape, and the vortex suppression devices 26b of the eighth embodiment, each of which has the forward-inclined shape.

[0232] The Fig. 30 and Fig. Figure 31 shows perspective views of one of the vortex suppression devices 26b of the flow straightening mechanism 26, viewed from the other side in the direction of rotation Ka1. Dotted lines in Fig. Figure 30 shows a comparative example in which one of the eddy current suppression devices 26b is designed to extend linearly in the radial direction Kc1. Dotted lines in Fig. Figure 31 shows a comparative example in which one of the vortex suppression devices 26b has an axial position in the fan axial direction DRa, which remains constant along the radial direction Kc1.

[0233] The vortex suppression devices 26b of the present embodiment are each designed such that the end surface 270A of each of the vortex suppression devices 26b extends to the other side in the direction of rotation Ka1, with the end surface 270A extending from the radially inner side to the radially outer side in the radial direction Kc1, similar to the tenth embodiment.

[0234] Accordingly, as in the tenth embodiment, the noise generated when the airflow from the sub-channels 130a to the other side in the fan axial direction DRa can be reduced.

[0235] The vortex suppression devices 26b of the present embodiment are each designed such that the end surface 270 of each of the vortex suppression devices 26b extends to one side in the fan axial direction DRa, with the end surface 270 extending from the radially inner side to the radially outer side in the radial direction Kc1 as in the eighth embodiment. Accordingly, as in the eighth embodiment, the noise generated when the air flows from the sub-channels 130a to the other side in the fan axial direction DRa can be reduced.

[0236] Accordingly, in the embodiment described above, the noise can be reduced even further by combining the tenth embodiment and the eighth embodiment. Fourteenth embodiment

[0237] In the flow straightening mechanism 26 of the fourteenth embodiment, with reference to the Fig. 32 and Fig. 33 an example is described in which a mechanism is used which combines the vortex suppression devices 26b of the fifth embodiment, each having the rearward extending shape, and the vortex suppression devices 26b of the eighth embodiment, each having the forward inclined shape.

[0238] The Fig. 32 and Fig. Figure 33 shows perspective views of one of the vortex suppression devices 26b of the flow straightening mechanism 26, viewed from the other side in the direction of rotation Ka1. Dotted lines in Fig. Figure 33 shows a comparative example in which one of the vortex suppression devices 26b is designed to extend linearly in the radial direction Kc1. Dotted lines in Fig. Figure 32 shows a comparative example in which one of the vortex suppression devices 26b has an axial position in the fan axial direction DRa, which remains constant along the radial direction Kc1.

[0239] The vortex suppression devices 26b of the present embodiment are each designed such that the end surface 270 of each of the vortex suppression devices 26b extends to one side in the fan axial direction DRa, with the end surface 270 extending from the radially inner side to the radially outer side in the radial direction Kc1 as in the eighth embodiment.

[0240] Accordingly, as in the eighth embodiment, the noise generated when the air flows from the sub-channels 130a to the other side in the fan axial direction DRa can be reduced.

[0241] The vortex suppression devices 26b of the present embodiment are each designed such that the end surface 270A of each of the vortex suppression devices 26b extends to one side in the direction of rotation Ka1, with the end surface 270A extending from the radially inner side to the radially outer side in the radial direction Kc1 as in the fifth embodiment.

[0242] Therefore, as in the fifth embodiment, the noise generated when the air blown by the blower fan (blower fan wheel) 201 collides with the eddy flow suppression devices 26b can be reduced.

[0243] Accordingly, in the embodiment described above, the noise can be reduced even further by combining the fifth and eighth embodiments. Fifteenth embodiment

[0244] In the flow straightening mechanism 26 of the present embodiment, with reference to the Fig. 34 and Fig. 35 an example is described in which a mechanism is used which combines the vortex suppression devices 26b of the first embodiment, each of which has the rearward inclined shape, and the vortex suppression devices 26b of the tenth embodiment, each of which has the forward extending shape.

[0245] The Fig. 34 and Fig. Figure 35 shows perspective views of one of the vortex suppression devices 26b of the flow straightening mechanism 26, viewed from the other side in the direction of rotation Ka1. Dotted lines in Fig. Figure 34 shows a comparative example in which one of the vortex suppression devices 26b is designed to extend linearly in the radial direction Kc1. Dotted lines in Fig. Figure 35 shows a comparative example in which one of the vortex suppression devices 26b has an axial position in the fan axial direction DRa, which remains constant along the radial direction Kc1.

[0246] As in the first embodiment, the end surface 270 of each of the eddy flow suppression devices 26b of the present embodiment is designed such that it extends to the other side in the fan axial direction DRa, with the end surface 270 extending from the radially inner side to the radially outer side in the radial direction Kc1 around the fan axis CL1. Therefore, as in the first embodiment, the noise generated when the air blown by the blower fan (blower impeller) 201 collides with the eddy flow suppression devices 26b can be reduced.

[0247] The vortex suppression devices 26b of the present embodiment are each designed such that the end surface 270A of each of the vortex suppression devices 26b extends to the other side in the direction of rotation Ka1, with the end surface 270A extending from the radially inner side to the radially outer side in the radial direction Kc1 as in the tenth embodiment. Accordingly, as in the tenth embodiment, the noise generated when the air flows from the lower channels 130a to the other side in the fan axial direction DRa can be reduced.

[0248] According to the embodiment described above, the noise can be reduced even further by combining the first embodiment and the tenth embodiment. Sixteenth embodiment

[0249] In the flow straightening mechanism 26 of the present embodiment, with reference to the Fig. 36 and Fig. 37 an example is described in which a mechanism is used which combines the vortex suppression devices 26b of the first embodiment, each of which has the backward inclined shape (backward inclined shape), and the vortex suppression devices 26b of the fifth embodiment, each of which has the rearward extending shape (backward extending shape).

[0250] The Fig. 36 and Fig. Figure 37 shows perspective views of one of the vortex suppression devices 26b of the flow straightening mechanism 26, viewed from the other side in the direction of rotation Ka1. Dotted lines in Fig. Figure 36 shows a comparative example in which one of the vortex suppression devices 26b is designed to extend linearly in the radial direction Kc1. Dotted lines in Fig. Figure 37 shows a comparative example in which one of the vortex suppression devices 26b has an axial position in the fan axial direction DRa, which remains constant along the radial direction Kc1.

[0251] The eddy flow suppression devices 26b of the present embodiment are each configured in a backward-extending shape such that the end surface 270A of each of the eddy flow suppression devices 26b extends to one side in the direction of rotation Ka1, with the end surface 270A extending from the radially inner side to the radially outer side in the radial direction Kc1, as in the fifth embodiment. Therefore, as in the fifth embodiment, the noise generated when the air blown by the blower fan (blower impeller) 201 collides with the eddy flow suppression devices 26b can be reduced.

[0252] As in the first embodiment, the end surface 270 of each of the vortex suppression devices 26b of the present embodiment is designed such that it extends to the other side in the fan axial direction DRa, with the end surface 270 extending from the radially inner side to the radially outer side in the radial direction Kc1 around the fan axis CL1.

[0253] Therefore, as in the first embodiment, the noise generated when the air blown by the blower fan 201 collides with the eddy flow suppression devices 26b can be reduced.

[0254] According to the embodiment described above, the noise can be reduced even further by combining the first embodiment and the fifth embodiment. Further examples of implementation

[0255] (1) In the first to sixteenth embodiments described above, an example is described in which the blower device 100 of the present disclosure is used in a vehicle air conditioning unit 10.

[0256] However, the blower device 100 of the present disclosure can instead be used in various devices, such as stationary air conditioning units other than the vehicle air conditioning unit 10.

[0257] (2) In the fourth embodiment described above, an example is described in which the dimension dDa measured in the direction of rotation Ka1 of each of the vortex suppression devices 26b increases as the vortex suppression device 26b extends from the radially inner side to the radially outer side in the radial direction Kc1.

[0258] However, instead, in the first to third embodiments and the fourth to sixteenth embodiments described above, the dimension dDa measured in the direction of rotation Ka1 of each of the vortex suppression devices 26b can be set such that it increases from the radially inner side to the radially outer side in the radial direction Kc1.

[0259] (3) In the twelfth embodiment described above, an example is described in which the dimension dDa measured in the direction of rotation Ka1 decreases from each of the vortex suppression devices 26b as the vortex suppression device 26b extends from the radially inner side to the radially outer side in the radial direction Kc1.

[0260] However, in the first to eleventh embodiments and in the twelfth to sixteenth embodiments described above, the dimension dDa measured in the direction of rotation Ka1 of each of the vortex suppression devices 26b can instead be set such that it decreases from the radially inner side to the radially outer side in the radial direction Kc1.

[0261] (4) In the third embodiment described above, an example is described in which the acute angle θ2 defined between the end surface 27a and the imaginary plane Sa in each of the vortex suppression devices 26b of the first embodiment decreases from the radially inner side to the radially outer side in the radial direction Kc1.

[0262] However, instead, in each of the vortex suppression devices 26b in the second embodiment and fourth to sixteenth embodiments described above, the acute angle θ2 defined between the end surface 27a and the imaginary plane Sa can be set such that it decreases from the radially inner side to the radially outer side in the radial direction Kc1.

[0263] In each of the vortex suppression devices 26b of the second embodiment and of the fourth to sixteenth embodiments described above, the acute angle θ3 defined between the end surface 27b and the imaginary plane Sa can be set such that it decreases from the radially inner side to the radially outer side in the radial direction Kc1.

[0264] (5) In the seventh embodiment described above, an example is described in which each of the vortex suppression devices 26b of the first embodiment is formed in the curved shape which is convex in the inclination direction Kd1 to one side in the rotation direction Ka1.

[0265] However, instead, in the second to sixth embodiments and the eighth to sixteenth embodiments described above, each of the vortex suppression devices 26b can be designed in the curved shape which is convex in the inclination direction Kd1 to one side in the rotation direction Ka1.

[0266] (6) In the first and eighth embodiments described above, an example is described in which the vortex suppression devices 26b comprise at least two vortex suppression devices 26b whose axial distances dDR to each other are different.

[0267] However, in the second to seventh embodiments and the ninth to sixteenth embodiments described above, the vortex suppression devices 26b may instead comprise at least two vortex suppression devices 26b whose axial distances dDR to each other are different.

[0268] For example, in the second to seventh embodiments and the ninth to sixteenth embodiments described above, all vortex suppression devices 26b can have different axial distances dDR that are different from each other.

[0269] (7) In the first embodiment described above, an example is described in which the vortex suppression devices 26b are arranged in the circumferential direction such that two or more of the intervals Kn are different from each other.

[0270] However, in the second to sixteenth embodiments described above, the vortex suppression devices 26b of the flow straightening mechanism 26 can instead be arranged circumferentially such that two or more of the intervals Kn are different from each other. For example, the flow straightening mechanism 26 can be designed such that the intervals Kn of the eight sub-channels 130a are different from each other.

[0271] (8) The first embodiment described above is an example in which the radially outer end section of each of the eddy flow suppression devices 26b, which faces the outer side in the radial direction Kc1, is connected to the inner wall 12a, and the radially inner end section of each of the eddy flow suppression devices 26b, which faces the inner side in the radial direction Kc1, is connected to the cover 26a. However, alternatives (a) and (b) below may be used instead. (a) The vortex suppression devices 26b can be constructed such that the radially outer end section of each of the vortex suppression devices 26b, which faces the outside in the radial direction Kc1, is connected to the inner wall 12a, and the radially inner end section of each of the vortex suppression devices 26b, which faces the inside in the radial direction Kc1, is not connected to the cover 26a. (b) The vortex suppression devices 26b can be constructed such that the radially outer end section of each of the vortex suppression devices 26b, which faces the outside in the radial direction Kc1, is not connected to the inner wall 12a, and the radially inner end section of each of the vortex suppression devices 26b, which faces the inside in the radial direction Kc1, is connected to the cover 26a.

[0272] (9) In the first to ninth embodiment described above, an example is described in which, with respect to the end surface 270 of each of the vortex suppression devices 26b, the distance between the radially outer end section 271 and the radially inner end section 272, measured in the fan axial direction DRa, is defined as the axial distance dDR.

[0273] However, the following alternative can be used instead. That is, for each of the vortex suppression devices 26b, an end section of the other side of the vortex suppression devices 26b, which faces the other side in the fan axial direction DRa and which is elongated in the radial direction Kc1, is defined as an end surface of the other side.

[0274] An end section of the end face of the opposite side of each vortex suppression device 26b, located most radially inward in the radial direction at the end face of the opposite side, is defined as a radially inner end section. An end section of the end face of the opposite side of each of the vortex suppression devices 26b, located most radially outward in the radial direction at the end face of the opposite side, is defined as a radially outer end section. Here, the distance between the radially outer end section and the radially inner end section, measured in the fan axial direction, is defined as an axial distance dDR.

[0275] (10) In the fifth and tenth embodiments described above, an example is described in which, with respect to the end surface 270A of each of the vortex suppression devices 26b, the distance measured in the direction of rotation Ka1 between the radially outer end section 273 and the radially inner end section 274 is defined as the rotation distance dDk.

[0276] However, the following alternative can be used instead. That is, in each of the vortex suppression devices 26b, an end section of one side of the vortex suppression device 26b, which points to one side in the direction of rotation Ka1 of the blower fan 201 and is elongated in the radial direction Kc1, is defined as an end surface of one side.

[0277] An end section of the end surface of one side of each vortex suppression device 26b, located most radially outward in the radial direction Kc1 at the end surface of one side, is defined as a radially outer end section. An end section of the end surface of one side, located most radially inward in the radial direction Kc1 at the end surface of one side, is defined as a radially inner end section.

[0278] Here, a distance between the radially outer end section and the radially inner end section, measured in the direction of rotation Ka1, is defined as a rotational distance dDk.

[0279] (11) In the first embodiment described above, an example is described in which the flow straightening mechanism 26 is constructed such that when light from the light source 300 is projected (radiated) onto the flow straightening mechanism 26 from one side in the fan axial direction DRa, shadows cast onto the wall 301 by the vortex flow suppression devices 26b are offset from each other.

[0280] Similarly, in the second to sixteenth embodiments described above, the flow straightening mechanism 26 can be constructed such that when light from the light source 300 is projected (radiated) onto the flow straightening mechanism 26 from one side in the fan axial direction DRa, shadows cast onto the wall 301 by the vortex flow suppression devices 26b are offset from one another.

[0281] (12) In the fourth embodiment described above, an example is described in which the vortex suppression devices 26b are constructed such that the dimension (i.e. the dimension dDa) measured between the end faces 275A, 275B of the vortex suppression device 26b in the direction of rotation Ka1 increases as the vortex suppression device 26b extends from the radially inner side to the radially outer side in the radial direction Kc1.

[0282] However, the present invention is not limited thereto, and the vortex suppression devices 26b need not necessarily define the dimension dDa in the direction of rotation Ka1 as the dimension between the end surfaces 275A, 275B, as long as the dimension dDa of each of the vortex suppression devices 26b increases in the direction of rotation Ka1 from the radially inner side to the radially outer side in the radial direction Kc1. The same applies to the twelfth embodiment described above.

[0283] (12) In the fourth embodiment described above, an example is described in which the dimension dDa, measured in the direction of rotation Ka1, of each of the vortex suppression devices 26b increases as the vortex suppression device 26b extends from the radially inner side to the radially outer side in the radial direction Kc1. Furthermore, in the fourth embodiment described above, the vortex suppression devices 26b can be constructed such that each vortex suppression device 26b has an identical shape. Alternatively, two or more of the vortex suppression devices 26b can have different shapes that are distinct from one another.

[0284] (13) In the twelfth embodiment described above, an example is described in which the dimension dDa, measured in the direction of rotation Ka1, decreases from each of the vortex suppression devices 26b along the radial direction Kc1 from the radially inner side to the radially outer side. Furthermore, in the twelfth embodiment described above, the vortex suppression devices 26b can be constructed such that each vortex suppression device 26b has an identical shape. Alternatively, two or more of the vortex suppression devices 26b can have different shapes that are distinct from one another.

[0285] (14) The present disclosure is not limited to the embodiments described above. Furthermore, the embodiments described above are related to one another and can be combined appropriately, provided that the combination is not obviously impossible. It need not be stated that in each of the embodiments described above, the elements of the embodiment are not strictly necessary, except where it is clearly stated that they are essential and where they are obviously to be considered essential in principle.In each of the embodiments described above, if a numerical value such as a number, a numerical size, a quantity, a range, or the like of the constituent elements of the embodiment is mentioned, the present invention should not be limited to such a numerical value unless it is clearly stated that it is essential and / or that it is necessary in principle. Similarly, in each of the embodiments described above, if the shape, positional relationship, or the like of the constituent elements of the embodiment is mentioned, the present disclosure should not be limited to the shape, positional relationship, or the like unless it is clearly stated that it is essential and / or that it is necessary in principle. Various aspects Aspect 1

[0286] According to aspect 1 of the present disclosure, a blower device has been created which has the following features: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to draw in air from one side in the axial direction and to blow the air outwards around the axis in a radial direction to a radially outer side; a cover (26a) arranged on another side in the axial direction with respect to the blower fan in the air duct and configured to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed such that a vortex flow of air generated by rotation of the blower fan is suppressed and thereby an airflow is generated which flows to the other side in the axial direction, wherein: an end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to the other side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction. Aspect 2

[0287] According to aspect 2, a blower device has been created which has the following features: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to draw in air from one side in the axial direction and to blow the air about the axis in a radial direction to a radially outer side; a cover (26a) arranged on another side in the axial direction with respect to the blower fan in the air duct and configured to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270) of one side of the at least one vortex suppression device which points to one side in the axial direction, is designed such that it extends to one side in the axial direction with the end section of one side extending from a radially inner side to the radially outer side in the radial direction. Aspect 3

[0288] According to aspect 3, a blower device according to aspect 1 or 2 has been created, wherein: an end section of the end section of one side of the at least one vortex suppression device, which points towards one side in the axial direction and is located radially furthest inside in the radial direction on the end section of one side, is defined as a radially inner end section (272); an end section of the end section of one side of the at least one vortex suppression device which points to one side in the axial direction and is located radially furthest out in the radial direction on the end section of one side, is defined as a radially outer end section (271); a distance between the radially inner end section and the radially outer end section, measured in the axial direction, is defined as an axial distance (dDR); and the at least one vortex suppression device is a plurality of vortex suppression devices comprising two or more vortex suppression devices, wherein the axial distances of the two or more vortex suppression devices differ from each other. Aspect 4

[0289] According to aspect 4, a blower device has been created which has the following features: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate to one side in a direction of rotation (Ka1) about the axis in order to draw in air from one side in the axial direction and to blow the air out around the axis in a radial direction to a radially outer side; a cover (26a) arranged on another side in the axial direction with respect to the blower fan in the air duct and configured to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which is directed towards the other side which is opposite to the one side in the direction of rotation, is designed such that it extends to the one side in the direction of rotation by extending the end section of the other side from a radially inner side to the radially outer side in the radial direction. Aspect 5

[0290] According to aspect 5, a blower device has been created which has the following features: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to one side in a direction of rotation (Ka1) in order to draw in air from one side in the axial direction and to blow the air out about the axis in a radial direction to a radially outer side; a cover (26a) arranged on another side in the axial direction with respect to the blower fan in the air duct and configured to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which is directed towards the other side which is opposite to the one side in the direction of rotation, is designed such that it extends to the other side in the direction of rotation with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction. Aspect 6

[0291] According to aspect 6, a blower device according to aspect 4 or 5 has been created, wherein: an end section of the end section of the other side of the at least one vortex suppression device, which is directed towards the other side in the direction of rotation and is located radially furthest inside in the radial direction on the end section of the other side, is defined as a radially inner end section (274); an end section of the end section of the other side of the at least one vortex suppression device, which is oriented towards the other side in the direction of rotation and is located radially furthest out in the radial direction on the end section of the other side, is defined as a radially outer end section (273); a distance between the radially inner end section and the radially outer end section, measured in the direction of rotation, is defined as a rotational distance (dDk); and wherein at least one vortex suppression device is a plurality of vortex suppression devices comprising two or more vortex suppression devices, wherein the rotational distances of the two or more vortex suppression devices differ from each other. Aspect 7

[0292] According to aspect 7, a blower device has been created which has the following features: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to draw in air from one side in the axial direction and to blow the air outwards around the axis in a radial direction to a radially outer side; a cover (26a) arranged on another side in the axial direction with respect to the blower fan in the air duct and configured to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: A dimension (dDa) of the at least one vortex suppression device, measured in a direction of rotation (Ka1) of the blower fan, increases as the at least one vortex suppression device extends from a radially inner side to the radially outer side in the radial direction. Aspect 8

[0293] According to aspect 8, a blower device has been created which has the following features: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to draw in air from one side in the axial direction and to blow the air outwards around the axis in a radial direction to a radial outside; a cover (26a) arranged on another side in the axial direction with respect to the blower fan in the air duct and configured to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotating the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: a dimension (dDa) of the at least one vortex suppression device, which is measured in a direction of rotation (Ka1) of the blower fan, decreases as the at least one vortex suppression device extends from a radial inside to the radial outside in the radial direction. Aspect 9

[0294] According to aspect 9, a blower device has been created in accordance with one of aspects 1 to 8, wherein: a direction which intersects with both the axial direction and a direction of rotation (Ka1) of the blower fan and is directed from the other side to one side in the direction of rotation and from the other side to one side in the axial direction, is defined as a cutting direction (Kd1); the at least one vortex suppression device having an end surface (290) of one side which faces that side in the direction of rotation, wherein the end surface of that side is formed in a curved shape which is convex in the cutting direction to that side in the direction of rotation; and the at least one vortex suppression device has an end surface (291) of the other side which is facing the other side in the direction of rotation, wherein the end surface of the other side is formed in a curved shape which is convex in the cutting direction to the one side in the direction of rotation. Aspect 10

[0295] According to aspect 10, a blower device has been created in accordance with one of aspects 1 to 9, wherein: which at least one vortex suppression device has an end surface (27a, 27b) that points in the axial direction and is elongated along a direction of rotation (Ka1) of the blower fan; and the end surface is designed such that an acute angle (θ2, θ3) defined between the end surface and an imaginary plane (Sa) parallel to the direction of rotation and perpendicular to the axial direction decreases as the end surface extends from the radially inner side to the radially outer side. Aspect 11

[0296] According to aspect 11, a blower device according to one of aspects 1 to 10 has been created, wherein the at least one vortex suppression device is a plurality of vortex suppression devices arranged at intervals (Kn) in a circumferential direction around the axis. Aspect 12

[0297] According to aspect 12, a blower device according to aspect 11 has been created, wherein the eddy flow suppression devices provided in plurality are arranged in the circumferential direction such that intervals comprise at least two different intervals which are different from each other. Aspect 13

[0298] According to aspect 13, a blower device according to aspect 11 has been created, wherein the eddy flow suppression devices provided in plurality are arranged in such a way that an overlap of respective shadows of the plurality of eddy flow suppression devices is avoided, which are generated when the eddy flow suppression devices provided in plurality are optically irradiated from one side in the axial direction. Aspect 14

[0299] According to aspect 14, a blower device has been created which has the following features: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate to one side in a direction of rotation (Ka1) about the axis to draw in air from one side in the axial direction and blow the air out around the axis in a radial direction to a radial outside; a cover (26a) which is arranged in the air duct on the other side in the axial direction with respect to the blower fan and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which points to the other side which is opposite to one side in the direction of rotation, is configured such that it extends to the other side in the direction of rotation, with the end section of the other side extending from the radially inner side to the radially outer side in the radial direction; and an end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to one side in the axial direction, with the end section of one side extending from a radial inside to the radial outside in the radial direction. Aspect 15

[0300] According to aspect 15, a blower device has been created which has the following features: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate to one side in a direction of rotation (Ka1) about the axis to draw in air from one side in the axial direction and blow the air out around the axis in a radial direction to a radial outside; a cover (26a) arranged on another side in the axial direction with respect to the blower fan in the air duct and configured to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which points to the other side which is opposite to one side in the direction of rotation, is configured such that it extends to one side in the direction of rotation, with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction; and an end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to one side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction. Aspect 16

[0301] According to aspect 16, a blower device has been created which has the following features: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to one side in a direction of rotation (Ka1) in order to draw in air from one side in the axial direction and blow the air out about the axis in a radial direction to a radially outer side; a cover (26a) which is arranged on the other side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated in the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which faces the other side opposite to the one side in the direction of rotation, is configured such that it extends to the other side in the direction of rotation, with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction; and an end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to the other side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction. Aspect 17

[0302] According to aspect 17, a blower device has been created which has the following features: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to one side in a direction of rotation (Ka1) in order to draw in air from one side in the axial direction and blow the air out about the axis in a radial direction to a radially outer side; a cover (26a) which is arranged on the other side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which points to the other side which is opposite to one side in the direction of rotation, is configured such that it extends to one side in the direction of rotation, with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction; and an end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to the other side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction. Reference symbol list 10 Vehicle air conditioning unit 12 air conditioning units 12a Interior wall 26 Flow straightening mechanism 26a Cover 26b Vortex suppression device 100 blower device 123 Air duct 130 through channel 201 Blower fan (blower fan wheel) QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2023 - 060325

[0001] JP 6747469 B2

[0006]

Claims

[1] Blower device with: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to draw in air from one side in the axial direction and to blow the air outwards around the axis in a radial direction to a radially outer side; a cover (26a) which is arranged on another side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed such that a vortex flow of air generated by rotation of the blower fan is suppressed and thereby an airflow is generated which flows to the other side in the axial direction, wherein: an end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to the other side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction. [2] Blower device with: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to draw in air from one side in the axial direction and to blow the air about the axis in a radial direction to a radially outer side; a cover (26a) which is arranged on another side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270) of one side of the at least one vortex suppression device which points to one side in the axial direction, is designed such that it extends to one side in the axial direction with the end section of one side extending from a radially inner side to the radially outer side in the radial direction. [3] Blower device according to claim 1 or 2, wherein: an end section of the end section of one side of the at least one vortex suppression device, which points towards one side in the axial direction and is located radially furthest inside in the radial direction on the end section of one side, is defined as a radially inner end section (272); an end section of the end section of one side of the at least one vortex suppression device which points to one side in the axial direction and is located radially furthest out in the radial direction on the end section of one side, is defined as a radially outer end section (271); a distance between the radially inner end section and the radially outer end section, measured in the axial direction, is defined as an axial distance (dDR); and the at least one vortex suppression device is a plurality of vortex suppression devices comprising two or more vortex suppression devices, wherein the axial distances of the two or more vortex suppression devices differ from each other. [4] Blower device with: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to one side in a direction of rotation (Ka1) in order to draw in air from one side in the axial direction and to blow the air out about the axis in a radial direction to a radially outer side; a cover (26a) which is arranged on another side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which is directed towards the other side which is opposite to the one side in the direction of rotation, is designed such that it extends to the one side in the direction of rotation by extending the end section of the other side from a radially inner side to the radially outer side in the radial direction. [5] Blower device with: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate to one side in a direction of rotation (Ka1) about the axis to draw in air from one side in the axial direction and to blow the air out around the axis in a radial direction to a radially outer side; a cover (26a) which is arranged on another side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which is directed towards the other side which is opposite to the one side in the direction of rotation, is designed such that it extends to the other side in the direction of rotation with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction. [6] Blower device according to claim 4 or 5, wherein: an end section of the end section of the other side of the at least one vortex suppression device, which is directed towards the other side in the direction of rotation and is located radially furthest inside in the radial direction on the end section of the other side, is defined as a radially inner end section (274); an end section of the end section of the other side of the at least one vortex suppression device, which is oriented towards the other side in the direction of rotation and is located radially furthest out in the radial direction on the end section of the other side, is defined as a radially outer end section (273); a distance between the radially inner end section and the radially outer end section, measured in the direction of rotation, is defined as a rotational distance (dDk); and wherein at least one vortex suppression device is a plurality of vortex suppression devices comprising two or more vortex suppression devices, wherein the rotational distances of the two or more vortex suppression devices differ from each other. [7] Blower device with: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to draw in air from one side in the axial direction and to blow the air outwards around the axis in a radial direction to a radially outer side; a cover (26a) which is arranged on another side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: a measure (dDa) that includes at least one Vortex suppression device, which is measured in one direction of rotation (Ka1) of the blower fan, increases under extension of the at least one vortex suppression device from a radially inner side to the radially outer side in the radial direction. [8] Blower device with: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate about the axis to draw in air from one side in the axial direction and to blow the air outwards around the axis in a radial direction to a radial outside; a cover (26a) which is arranged on another side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotating the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: a dimension (dDa) of the at least one vortex suppression device, which is measured in a direction of rotation (Ka1) of the blower fan, decreases as the at least one vortex suppression device extends from a radial inside to the radial outside in the radial direction. [9] Blower device according to one of claims 1, 2, 4, 5, 7 or 8, wherein: a direction which intersects with both the axial direction and a direction of rotation (Ka1) of the blower fan and is directed from the other side to one side in the direction of rotation and from the other side to one side in the axial direction, is defined as a cutting direction (Kd1); the at least one vortex suppression device having an end surface (290) of one side which faces that side in the direction of rotation, wherein the end surface of that side is formed in a curved shape which is convex in the cutting direction to that side in the direction of rotation; and the at least one vortex suppression device has an end surface (291) of the other side which is facing the other side in the direction of rotation, wherein the end surface of the other side is formed in a curved shape which is convex in the cutting direction to the one side in the direction of rotation. [10] Blower device according to one of claims 1, 2, 4, 5, 7 or 8, wherein: which at least one vortex suppression device has an end surface (27a, 27b) that points in the axial direction and is elongated along a direction of rotation (Ka1) of the blower fan; and the end surface is designed such that an acute angle (θ2, θ3) defined between the end surface and an imaginary plane (Sa) parallel to the direction of rotation and perpendicular to the axial direction decreases as the end surface extends from the radially inner side to the radially outer side. [11] Blower device according to one of claims 1, 2, 4, 5, 7 or 8, wherein the at least one vortex suppression device is a plurality of vortex suppression devices arranged at intervals (Kn) in a circumferential direction around the axis. [12] Blower device according to claim 11, wherein the vortex suppression devices provided in plurality are arranged in the circumferential direction such that the intervals comprise at least two different intervals which are different from each other. [13] Blower device according to claim 11, wherein the vortex suppression devices provided in plurality are arranged such that an overlap of respective shadows of the plurality of vortex suppression devices is avoided, which are then generated when the vortex suppression devices provided in plurality are optically irradiated from one side in the axial direction. [14] Blower device with: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate to one side in a direction of rotation (Ka1) about the axis in order to draw in air from one side in the axial direction and blow the air out around the axis in a radial direction to a radial outside; a cover (26a) which is arranged in the air duct on the other side in the axial direction with respect to the blower fan and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which points to the other side which is opposite to one side in the direction of rotation, is configured such that it extends to the other side in the direction of rotation, with the end section of the other side extending from the radially inner side to the radially outer side in the radial direction; and an end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to one side in the axial direction, with the end section of one side extending from a radial inside to the radial outside in the radial direction. [15] Blower device with: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate to one side in a direction of rotation (Ka1) about the axis to draw in air from one side in the axial direction and to blow the air out around the axis in a radial direction to a radial outside; a cover (26a) which is arranged on another side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which points to the other side which is opposite to one side in the direction of rotation, is configured such that it extends to one side in the direction of rotation, with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction; and an end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to one side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction. [16] Blower device with: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate to one side in a direction of rotation (Ka1) about the axis to draw in air from one side in the axial direction and blow the air out around the axis in a radial direction to a radially outer side; a cover (26a) which is arranged on the other side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated in the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which faces the other side opposite to the one side in the direction of rotation, is configured such that it extends to the other side in the direction of rotation, with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction; and an end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to the other side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction. [17] Blower device with: an air conditioning housing (12) having an inner wall (12a) wherein the inner wall forms an air channel (123) which is designed to conduct air; a blower fan (201) arranged in the air duct, wherein a direction in which an axis (CL1) of the blower fan extends is defined as an axial direction (DRa), and the blower fan is designed to rotate to one side in a direction of rotation (Ka1) about the axis to draw in air from one side in the axial direction and blow the air out around the axis in a radial direction to a radially outer side; a cover (26a) which is arranged on the other side in the axial direction with respect to the blower fan in the air duct and is designed to cover the blower fan from the other side in the axial direction, the cover forming a passage (130) between the cover and the inner wall, which is designed to direct the air blown out by the blower fan to the other side in the axial direction; and at least one vortex suppression device (26b) arranged in the passage channel and elongated along the radial direction, wherein the at least one vortex suppression device is designed to suppress a vortex flow of air generated by rotation of the blower fan and thereby generates an airflow that flows to the other side in the axial direction, wherein: an end section (270A) of the other side of the at least one vortex suppression device, which points to the other side which is opposite to one side in the direction of rotation, is configured such that it extends to one side in the direction of rotation, with the end section of the other side extending from a radially inner side to the radially outer side in the radial direction; and an end section (270) of one side of the at least one vortex suppression device, which points to one side in the axial direction, is designed such that it extends to the other side in the axial direction, with the end section of one side extending from a radially inner side to the radially outer side in the radial direction.

Images