WO2021085086A1

WO2021085086A1 - Blower

Info

Publication number: WO2021085086A1
Application number: PCT/JP2020/038311
Authority: WO
Inventors: 翔小坂
Original assignee: 株式会社デンソー
Priority date: 2019-10-31
Filing date: 2020-10-09
Publication date: 2021-05-06
Also published as: JP2021071097A

Abstract

A fan (30) of a blower (1) comprises a dividing plate (34) for suppressing mixing of cabin-outside air flowing in a first vane passageway (310) and cabin-inside air flowing in a second vane passageway (320). A partition plate (57) is provided inside a casing to partition a ventilating path (53) for the air blown out from the fan into a first ventilating path (531) into which the cabin-outside air flows and a second ventilating path (532) into which the cabin-inside air flows. The dividing plate includes a rear-edge plate portion (342) positioned radially outside with respect to a first blade. The rear-edge plate portion has an end portion radially outside the rear-edge plate portion which is located radially outside of an upstream edge portion (571) of the partition plate opposite the fan and on the other side axially with respect to the upstream edge portion. The partition plate has an airflow turnaround portion (80) radially outside the rear-edge plate portion for causing the direction of the cabin-inside air moving toward a gap between the rear-edge plate portion and the partition plate to be turned around in a direction away from the partition plate.

Description

Blower

Cross-reference to related applications

This application is based on Japanese Patent Application No. 2019-199051 filed on October 31, 2019, the contents of which are incorporated herein by reference.

This disclosure relates to a blower.

Conventionally, a one-sided suction type centrifugal blower capable of distinguishing between vehicle interior air (hereinafter, also referred to as inside air) and vehicle interior outside air (hereinafter, also referred to as outside air) and simultaneously inhaling is known (for example, a patent). Reference 1).

The impeller of the centrifugal blower described in Patent Document 1 is divided into a space between a plurality of first blades located on one side in the axial direction and a space between a plurality of second blades located on the other side in the axial direction. It is divided by members. Further, in the scroll casing accommodating the impeller, the air flow path formed on the outer side in the radial direction of the impeller is formed by a partition wall with one first air flow path in the axial direction of the impeller and the other first air flow path in the axial direction. It is partitioned into two air flow paths. Further, inside the impeller in the radial direction, a separation cylinder is arranged to separate and flow the air taken in from the outside into the first air flow path and the second air flow path. As a result, the centrifugal blower can flow the outside air to the first air flow path through the outside of the separation cylinder and the impeller, while allowing the inside air to flow to the second air flow path through the inside of the separation cylinder and the impeller. It has become.

In Patent Document 1, the inner edge portion of the dividing member in the radial direction is located on one side of the partition wall in the axial direction from the wall edge portion facing the impeller, and the outer edge portion of the dividing member in the radial direction is located. The edge of the wall is outside the wall edge and is located on the other side in the axial direction from the wall edge.

Japanese Unexamined Patent Publication No. 2019-44739

By the way, Patent Document 1 does not examine the relationship between the pressure on the downstream side of the first blade and the pressure on the downstream side of the second blade. Therefore, if for some reason the pressure on the downstream side of the second blade becomes larger than the pressure on the downstream side of the first blade, the inside air flowing through the second air flow path passes through the gap between the dividing member and the partition wall. Therefore, it becomes easy to flow into the first air flow path.
An object of the present disclosure is to provide a centrifugal blower capable of suppressing the mixing of the vehicle interior air with the vehicle interior air sucked from the outside.

According to one aspect of the present disclosure, the blower
It is possible to distinguish between the outside air and the inside air and inhale at the same time.
A fan that blows out air sucked from one side of the fan axis in the direction away from the fan axis,
A casing that accommodates the fan and has a suction port for air that is sucked into the fan on one side in the axial direction with respect to the fan.
Including the tubular part arranged inside in the radial direction of the fan, the outside air of the passenger compartment and the air inside the passenger compartment are allowed to flow outside the tubular portion and the air inside the passenger compartment is allowed to flow inside the tubular portion. Equipped with a separation cylinder that separates from air,
Fans
With multiple first blades placed around the fan axis,
A plurality of second blades arranged around the fan axis and located on the other side in the axial direction with respect to the plurality of first blades.
A plurality of first blades and a plurality of second blades are connected, and the outside air flowing through the first wing passage formed between the plurality of first blades is formed between the plurality of second blades. Includes a split plate that suppresses mixing with the vehicle interior air flowing through the second wing passage,
Inside the casing, a ventilation path for the air blown out from the fan is formed on the outside in the radial direction with respect to the fan, and the first ventilation path through which the air outside the passenger compartment flows and the air inside the passenger compartment flow into the ventilation passage. A partition plate is provided to separate it from the second ventilation passage.
The split plate has a trailing edge plate portion located on the outer side in the radial direction with respect to the first blade.
The trailing edge plate portion is positioned so that the radial outer end portion of the trailing edge plate portion is radially outside the upstream edge portion facing the fan in the partition plate and is axially opposite to the upstream edge portion. Has been
The partition plate is provided with an airflow diversion portion that diverts the direction of the vehicle interior air toward the gap between the trailing edge plate portion and the partition plate in the direction away from the partition plate on the outer side in the radial direction from the trailing edge plate portion. There is a blower.

According to this, the direction of the air inside the vehicle toward the gap between the trailing edge plate and the partition plate is changed by the airflow turning portion in the direction away from the partition plate, so that the air inside the vehicle is separated from the trailing edge plate and the partition plate. It becomes difficult to flow into the gap of. As a result, the inflow of the vehicle interior air into the first ventilation path through the gap between the trailing edge plate portion and the partition plate is suppressed. That is, it is possible to prevent the vehicle interior air from being mixed with the vehicle interior air sucked from the outside.

Note that the reference symbols in parentheses attached to each component or the like indicate an example of the correspondence between the component or the like and the specific component or the like described in the embodiment described later.

It is a schematic block diagram of the centrifugal blower which concerns on 1st Embodiment. It is a schematic diagram which shows a part of the centrifugal blower which concerns on 1st Embodiment. It is an enlarged view of the part III of FIG. It is a schematic diagram which shows a part of the centrifugal blower which concerns on 2nd Embodiment. It is an enlarged view of the V part of FIG. It is a schematic diagram which shows a part of the centrifugal blower which concerns on 3rd Embodiment. It is an enlarged view of the VII part of FIG. It is a schematic diagram which shows a part of the centrifugal blower which concerns on 4th Embodiment. It is an enlarged view of the IX part of FIG. It is a schematic diagram which shows a part of the centrifugal blower which concerns on 5th Embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, the same reference numerals may be assigned to parts that are the same as or equivalent to those described in the preceding embodiments, and the description thereof may be omitted. Further, when only a part of the component is described in the embodiment, the component described in the preceding embodiment can be applied to the other part of the component. The following embodiments can be partially combined with each other as long as the combination does not cause any trouble, even if not explicitly stated.

(First Embodiment)
This embodiment will be described with reference to FIGS. 1 to 3. In the present embodiment, an example will be described in which the blower 1 of the present disclosure is applied to an air conditioner for a vehicle having two layers of inside and outside air capable of separating the outside air and the inside air and blowing them into the vehicle interior.

Although not shown, the vehicle air conditioner has a defroster outlet, a vent outlet, and a foot outlet, and blows air from each outlet toward the front window of the vehicle, the upper body of the occupant, and the feet of the occupant.

As shown in FIG. 1, the blower 1 includes an inside / outside air box 10, a filter 20, a fan 30, an electric motor 40, a scroll casing 50, and a separation cylinder 70. The blower 1 is arranged so that the direction of the fan axis CL coincides with the vertical direction. It should be noted that the direction of the fan axis CL is not limited to the vertical direction when the vehicle air conditioner is actually mounted on the vehicle.

Here, in the present specification, for convenience of explanation, the direction along the fan axis CL, which is the center of rotation of the fan 30, is referred to as the axial DRa. Further, in the present specification, unless otherwise specified, the radial direction of the radius of a circle drawn on a plane orthogonal to the fan axis CL with an arbitrary point on the fan axis CL as the center is referred to as the radial DRr. The circumferential direction of the circle is called the circumferential direction.

The inside / outside air box 10 is arranged on the upper side of the blower 1. A first outside air introduction port 11, a second outside air introduction port 12, a first inside air introduction port 13, and a second inside air introduction port 14 are formed on the upper surface of the inside / outside air box 10. The first outside air introduction port 11 and the second outside air introduction port 12 are openings for introducing outside air inside the inside / outside air box 10. The first inside air introduction port 13 and the second inside air introduction port 14 are openings for introducing inside air inside the inside / outside air box 10.

Inside the inside / outside air box 10, an outside air door 15, an inside / outside air door 16, and an inside air door 17 are provided. The outside air door 15 is a door that opens and closes the first outside air introduction port 11. The inside / outside air door 16 is a door that selectively opens and closes the second outside air introduction port 12 and the first inside air introduction port 13. The inside air door 17 is a door that opens and closes the second inside air introduction port 14. The outside air door 15 and the inside air door 17 are composed of butterfly doors. The inside / outside air door 16 is composed of a rotary door.

By providing the inside / outside air box 10, the blower 1 can distinguish between the inside air and the outside air and inhale them at the same time. The outside air door 15 and the inside air door 17 may be composed of doors other than the butterfly door (for example, a rotary door). Further, the inside / outside air door 16 may be composed of a door other than the rotary door (for example, a butterfly door).

The filter 20 is arranged below the inside / outside air box 10. The filters 20 are arranged in a posture that is substantially parallel in the horizontal direction. The filter 20 filters the air introduced from the inside / outside air box 10 to remove contaminants such as particles.

The fan 30 is a centrifugal fan that sucks air from one side of the axial DRa of the fan axis CL and blows out the sucked air in a direction away from the fan axis CL. The fan 30 is composed of a sirocco fan. The fan 30 is not limited to a sirocco fan, and may be composed of a radial fan, a turbo fan, or the like.

The fan 30 has a plurality of first blades 31, a plurality of second blades 32, a main plate 33, and a split plate 34. The plurality of first blades 31 are arranged side by side around the fan axis CL. A first wing passage 310 through which air flows is formed between the plurality of first blades 31.

The plurality of second blades 32 are arranged side by side around the fan axis CL. The plurality of second blades 32 are positioned on the other side of the axial DRa with respect to the plurality of first blades 31. A second wing passage 320 through which air flows is formed between the plurality of second blades 32.

The main plate 33 is composed of a disk-shaped member centered on the fan axis CL. The main plate 33 is provided with a boss portion 331 at the center thereof, to which the shaft 42 of the electric motor 40 is connected so as not to rotate relative to each other. In the main plate 33, the lower ends of a plurality of second blades 32 are fixed to a portion outside the radial DRr of the fan 30.

The dividing plate 34 is a member that connects the plurality of first blades 31 and the plurality of second blades 32. The dividing plate 34 includes air flowing through the first wing passage 310 formed between the plurality of first blades 31 and air flowing through the second wing passage 320 formed between the plurality of second blades 32. It is also a member that suppresses the mixing of air. The dividing plate 34 is composed of a ring-shaped member centered on the fan axis CL. The lower ends of the plurality of first blades 31 are fixed to the plate surface on one side of the axial DRa, and the upper ends of the plurality of second blades 32 are fixed to the plate surface on the other side of the axial DRa. Has been done.

The fan 30 configured in this way is configured as an integrally molded product in which a plurality of first blades 31, a plurality of second blades 32, a main plate 33, and a split plate 34 are integrally molded by a molding technique such as injection molding. Has been done.

The electric motor 40 is an electric motor that rotates the fan 30. The electric motor 40 has a main body 41 that generates power for rotating the fan 30, and a shaft 42 that is rotated by the power of the main body 41.

The shaft 42 extends from the main body 41 toward one side of the axial DRa. The shaft 42 is fixed to the main plate 33 by the motor cap 43. As a result, when the shaft 42 rotates, the fan 30 rotates.

The scroll casing 50 is a casing in which the fan 30 is housed. The scroll casing 50 functions to rectify the airflow radiating from the fan 30 into a flow in the circumferential direction of the fan 30. The scroll casing 50 forms a spiral ventilation path 53 on the outer side of the radial DRr with respect to the fan 30.

Although not shown, the scroll casing 50 is formed with a discharge path for blowing air toward the air conditioning unit of the vehicle air conditioner. As a result, the air flowing inside the scroll casing 50 is introduced into the air conditioning unit. The air conditioning unit (not shown) adjusts the air introduced from the blower 1 to a desired temperature and blows it out into the vehicle interior. The air conditioning unit adjusts the air introduced from the blower 1 to a desired temperature by a heat exchanger such as an evaporator or a heater core.

The scroll casing 50 is provided with a suction port forming portion 60 on one side of the axial DRa with respect to the fan 30. The suction port forming portion 60 is a portion of the scroll casing 50 that forms an upper end surface. An air suction port 61 for the fan 30 is formed in a substantially central portion of the suction port forming portion 60.

The suction port forming portion 60 is provided with a bell mouth 62 that guides air toward the suction port 61 at the peripheral edge of the suction port 61. The bell mouth 62 has an arcuate cross-sectional shape so that air can flow smoothly through the suction port 61. As a result, the air that has passed through the filter 20 is sucked into the fan 30 from the bell mouth 62.

The suction port forming portion 60 is provided with a mounting frame 63 for mounting the above-mentioned inside / outside air box 10 and the filter 20. The inside / outside air box 10 and the filter 20 are attached to the attachment frame 63.

Inside the scroll casing 50, a partition plate 57 for partitioning the ventilation passage 53 into the upper and lower first ventilation passages 531 and the second ventilation passage 532 is provided. The partition plate 57 is provided at a position corresponding to the division plate 34 of the fan 30. The partition plate 57 is provided so as to overlap the dividing plate 34 in the radial DRr of the fan 30, for example. As a result, the air passing through the first wing passage 310 of the fan 30 flows into the first ventilation passage 531. Further, the air passing through the second wing passage 320 of the fan 30 flows into the second ventilation passage 532.

A separation cylinder 70 is inserted inside the scroll casing 50 via a suction port 61. The separation cylinder 70 is a tubular member that extends in the axial direction DRa. The separation cylinder 70 has openings located at both ends of the axial DRa. The air passing through the suction port 61 is separated by the separation cylinder 70 into inner air passing through the inside of the separation cylinder 70 and outer air passing through the outside of the separation cylinder 70. The separation cylinder 70 has a tubular portion 72 whose at least a part is arranged inside the fan 30, and a tubular upper end portion 71 located on one side of the axial DRa with respect to the fan 30 in the tubular portion 72. The upper end portion 71 of the cylinder and the tubular portion 72 are configured as an integrally molded product that is integrally molded. In the separation cylinder 70, the upper end portion 71 of the cylinder and the tubular portion 72 formed separately may be connected to each other.

The cross-sectional shape of the separation cylinder 70 smoothly changes from a rectangle to a circle or a substantially circular shape as it approaches the tubular portion 72 from the upper end portion 71 of the cylinder. The separation cylinder 70 has a flare shape that increases in diameter as it approaches the lower end of the tubular portion 72.

Specifically, the upper end portion 71 of the cylinder is formed with an air inlet 710 for introducing air inside the tubular portion 72. The air inlet 710 opens below the second outside air introduction port 12 and the first inside air introduction port 13 so that the air introduced into the second outside air introduction port 12 and the first inside air introduction port 13 of the inside / outside air box 10 flows into the air inlet 710. doing.

The upper end portion 71 of the cylinder is arranged between the suction port forming portion 60 and the inside / outside air box 10 at a position where it overlaps with a part of the suction port 61 and the suction port forming portion 60. The upper end portion 71 of the cylinder covers substantially half of the suction port 61 and the bell mouth 62.

The upper end portion 71 of the cylinder has a substantially rectangular outer shape when viewed from one side of the axial DRa with respect to the fan 30. Further, at least a part of the upper end portion 71 of the cylinder is formed in a plate shape having a thickness in the axial direction DRa when viewed from the radial direction DRr with respect to the fan 30.

In the tubular portion 72, an upper portion 721 connected to the upper end portion 71 of the cylinder extends along the fan axis CL. Further, the lower portion 722 of the tubular portion 72 has a shape that expands in the radial direction DRr toward the other side of the axial DRa. At the lower end of the lower portion 722, an air outlet 720 that allows air to flow out from the inside of the separation cylinder 70 is formed.

The lower end of the lower portion 722 is provided at a position corresponding to the dividing plate 34 of the fan 30. The lower end of the lower portion 722 is provided so as to overlap the dividing plate 34 in the radial DRr, for example. As a result, the inside air passing through the inside of the separation cylinder 70 flows into the second wing passage 320 of the fan 30. Further, the outside air passing through the outside of the separation cylinder 70 flows into the first wing passage 310 of the fan 30.

The blower 1 configured in this way can be set as an air suction mode: an outside air mode that sucks in outside air, an inside air mode that sucks in inside air, and an inside / outside air mode that separates outside air and inside air and sucks them in at the same time.

The outside air mode is a mode in which only the outside air is introduced inside the inside / outside air box 10. In the blower 1, the outside air door 15 is displaced to a position where the first outside air introduction port 11 is opened, and the inside / outside air door 16 is displaced to a position where the second outside air introduction port 12 is opened in the outside air mode. The inside air door 17 is configured to be displaced to a position where the 14 is closed.

The inside air mode is a mode in which only the inside air is introduced inside the inside / outside air box 10. In the blower 1, the outside air door 15 is displaced to a position where the first outside air introduction port 11 is closed, and the inside / outside air door 16 is displaced to a position where the first inside air introduction port 13 is opened in the inside air mode. The inside air door 17 is configured to be displaced to a position where the 14 is opened.

The inside / outside air mode is a mode in which outside air and inside air are introduced inside the inside / outside air box 10. In the blower 1, in the inside / outside air mode, the outside air door 15 is displaced to the position where the first outside air introduction port 11 is opened, the inside / outside air door 16 is displaced to the position where the first inside air introduction port 13 is opened, and the second inside air is introduced. The inside air door 17 is configured to be displaced at a position where the mouth 14 is closed.

In the blower 1, when the fan 30 is rotated by the output from the electric motor 40 in the inside / outside air mode, the outside air is introduced from the first outside air introduction port 11 and the inside air is introduced from the first inside air introduction port 13.

As shown by the arrow Fao in FIG. 1, the outside air introduced from the first outside air introduction port 11 passes through a region of the filter 20 that does not overlap the upper end portion 71 of the cylinder and the axial DRa, and then passes through the outside of the separation cylinder 70. It is sucked into the first wing passage 310 of the fan 30 through the fan 30. The outside air sucked into the first wing passage 310 is blown out to the first ventilation passage 531.

On the other hand, the inside air introduced from the first inside air introduction port 13 is sucked into the second wing passage 320 of the fan 30 through the inside of the separation cylinder 70 as shown by the arrow Fai in FIG. The inside air sucked into the second wing passage 320 is blown out to the second ventilation passage 532.

Although not shown, the outside air flowing through the first ventilation passage 531 and the inside air flowing through the second ventilation passage 532 are introduced into the air conditioning unit from the scroll casing 50, adjusted to a desired temperature inside the air conditioning unit, and then different outlets. Is blown into the passenger compartment.

Here, when the vehicle air conditioner is operated in the inside / outside air mode, dry outside air is applied to the windshield to prevent fogging of the windshield. However, if the outside air that hits the windshield is mixed with moist inside air, the effect of preventing the windshield of the vehicle air conditioner from fogging may be reduced.

In consideration of such circumstances, the blower 1 is configured to be able to prevent the inside air from being mixed into the outside air. This will be described below with reference to FIGS. 2 and 3.

As shown in FIGS. 2 and 3, the fan 30 has a chord length from the front edge 321 to the trailing edge 322 of the second blade 32 from the chord length from the front edge 311 to the trailing edge 312 of the first blade 31. Is also getting bigger. The trailing edge 322 of the second blade 32 is located outside the radial DRr of the trailing edge 312 of the first blade 31.

In the dividing plate 34 of the fan 30, the portion outside the radial DRr is located outside the radial DRr from the upstream edge portion 571 of the partition plate 57, and the other side of the axial DRa from the upstream edge portion 571. Is located in.

Here, the upstream edge portion 571 of the partition plate 57 is a portion of the partition plate 57 facing the fan 30. That is, the upstream edge portion 571 is an inner end portion of the partition plate 57 in the radial direction DRr.

Specifically, the split plate 34 includes a front edge plate portion 341 which is an inner portion of the radial DRr, a trailing edge plate portion 342 which is a portion outside the radial DRr, and a front edge plate portion 341 and a trailing edge plate. It has an intermediate plate portion 343 that connects the portions 342.

The front edge plate portion 341 is a portion of the split plate 34 that extends from the front edge 311 of the first blade 31 to the trailing edge 312. The front edge plate portion 341 extends along the radial DRr. The front edge plate portion 341 is located on one side of the axial DRa with respect to the upstream edge portion 571.

The intermediate plate portion 343 extends along the axial DRa so as to overlap the trailing edge 312 of the first blade 31 and the axial DRa. In the intermediate plate portion 343, one end of the axial DRa is connected to the front edge plate portion 341, and the other end of the axial DRa is connected to the trailing edge plate portion 342. A part of the intermediate plate portion 343 faces the upstream edge portion 571 in the radial DRr.

The trailing edge plate portion 342 is a portion located outside the radial DRr with respect to the first blade 31. The trailing edge plate portion 342 extends from the trailing edge 312 of the first blade 31 to the trailing edge 322 of the second blade 32 along the radial DRr. Specifically, the trailing edge plate portion 342 is located outside the radial DRr from the upstream edge portion 571 and on the other side of the axial DRa from the upstream edge portion 571.

Here, in the blower 1 of the present embodiment, the trailing edge 322 of the second blade 32 is located outside the radial DRr of the trailing edge 312 of the first blade 31. In such a structure, the distance S2 between the second blade 32 and the side wall portion 51 of the scroll casing 50 is smaller than the distance S1 between the first blade 31 and the side wall portion 51. Therefore, the passage area of the second ventilation passage 532 is smaller than that of the first ventilation passage 531, and the pressure of the second ventilation passage 532 may be higher than the pressure of the first ventilation passage 531.

Further, in the blower 1 of the present embodiment, the front edge plate portion 341 of the dividing plate 34 is located on one side of the axial DRa with respect to the upstream edge portion 571 of the partition plate 57. In such a structure, the air blown out from the first wing passage 310 is unlikely to collide with the partition plate 57. In this case, noise can be suppressed, but the flow rate of air increases downstream of the plurality of first blades 31 and the static pressure downstream of the plurality of first blades 31 decreases.

As a result, in the blower 1 of the present embodiment, the pressure on the downstream side of the second blade 32 tends to be larger than the pressure on the downstream side of the first blade 31.

When the pressure on the downstream side of the second blade 32 tends to be larger than the pressure on the downstream side of the first blade 31, the air blown out from the second blade passage 320 creates a gap between the dividing plate 34 and the partition plate 57. There is a risk that it will flow into the first ventilation passage 531 through the air passage.

In consideration of these, the blower 1 of the present embodiment is provided with an airflow turning portion 80 with respect to the partition plate 57. The airflow turning portion 80 diverts the direction of the inside air toward the gap between the trailing edge plate portion 342 and the partition plate 57 in a direction away from the partition plate 57. The airflow turning portion 80 is provided outside the radial DRr of the partition plate 57 with respect to the trailing edge plate portion 342.

The airflow turning portion 80 is configured to include a recessed portion 81 recessed from the other side to one side in the axial direction DRa. Specifically, the recess 81 is composed of a substantially arc-shaped recess formed on the inner surface of the partition plate 57 that forms the second ventilation passage 532. Further, on the inner surface of the partition plate 57 forming the first ventilation passage 531, the portion where the recess 81 is formed protrudes in a substantially arc shape from one side of the axial DRa toward the other side.

The recess 81 is formed over the entire area without interruption in the circumferential direction centered on the fan axis CL. According to this, the direction of the inside air toward the gap between the trailing edge plate portion 342 and the partition plate 57 can be changed by the airflow turning portion 80 in the direction away from the partition plate 57 over the entire circumferential direction. The recess 81 may have a portion that is partially interrupted in the circumferential direction centered on the fan axis CL.

The recess 81 is provided in a range from a portion of the partition plate 57 located outside the radial DRr of the trailing edge plate portion 342 to a connection portion with the side wall portion 51. Specifically, in the recess 81, the width dimension Lv1 of the radial DRr is smaller than the width dimension Lv2 of the portion of the partition plate 57 located outside the radial DRr than the trailing edge plate portion 342. Further, in the recess 81, the height dimension Lh1 of the axial DRa is smaller than the height dimension Lh2 of the axial DRa of the dividing plate 34.

Here, the partition plate 57 has an upstream portion 570 extending from the upstream edge portion 571 to the airflow turning portion 80. As shown in FIG. 3, there is a change point CP whose shape changes between the upstream portion 570 and the airflow turning portion 80. The change point CP is a portion of the airflow turning portion 80 located most inside the radial DRr.

In the airflow turning portion 80, the inclination angle θs1 with respect to the upstream portion 570 at the change point CP is compared with the inclination angle θv1 with respect to the upstream portion 570 of the virtual line VL connecting the change point CP and the downstream end of the trailing edge plate portion 342. Is getting bigger.

The inclination angle θs1 is an angle formed by the tangent TL at the change point CP of the recess 81 constituting the airflow turning portion 80 and the upstream portion 570 extending along the radial DRr. In this example, the tangent TL extends along the axial DRa. Therefore, the inclination angle θs1 is approximately 90 °.

On the other hand, the tilt angle θv1 of this example is about 15 ° to 30 °, which is sufficiently smaller than the tilt angle θs1. In this example, the straight line passing through the change point CP and the upper end of the radial DRr of the trailing edge plate portion 342 is defined as a virtual line VL.

The blower 1 described above is provided with a recess 81 forming an airflow turning portion 80 outside the radial DRr of the partition plate 57 from the trailing edge plate portion 342. Therefore, even if the inside air blown from the second wing passage 320 to the second ventilation passage 532 flows toward the gap between the trailing edge plate portion 342 and the partition plate 57, the direction of the inside air is shown in FIG. As shown by the arrow Fr1, the airflow turning portion 80 is turned away from the partition plate 57. Specifically, the inside air flowing toward the gap between the trailing edge plate portion 342 and the partition plate 57 flows in an arc shape along the inner surface of the recessed portion 81 and is converted in a direction away from the partition plate 57.

As a result, it becomes difficult for the inside air to flow into the gap between the trailing edge plate portion 342 and the partition plate 57, so that the inside air flows into the first ventilation passage 531 through the gap between the trailing edge plate portion 342 and the partition plate 57. It can be suppressed. That is, it is possible to prevent the inside air from being mixed in with the outside air sucked from the outside.

In particular, the inclination angle θs1 with respect to the upstream portion 570 of the airflow turning portion 80 at the shape change point CP of the partition plate 57 is the inclination of the virtual line VL connecting the change point CP and the end portion of the trailing edge plate portion 342 with respect to the upstream portion 570. It is larger than the angle θv1.

According to this, the direction of the inside air toward the gap between the trailing edge plate portion 342 and the partition plate 57 is turned by the airflow turning portion 80 in a direction not facing the gap between the trailing edge plate portion 342 and the partition plate 57. As a result, the inflow of the inside air into the first ventilation passage 531 through the gap between the trailing edge plate portion 342 and the partition plate 57 is sufficiently suppressed.

(Modified example of the first embodiment)
In the first embodiment, the recess 81 having a substantially arc-shaped recess is illustrated, but the recess 81 is not limited to this, and may be composed of a recess having an inner surface other than the arc. Further, the recess 81 may be formed of, for example, a groove formed in the partition plate 57. In this case, the partition plate 57 may have a flat inner surface that forms the first ventilation passage 531. In the recess 81, the height dimension Lh1 in the axial direction DRa may be equal to or greater than the height dimension Lh2 in the axial direction DRa of the dividing plate 34.

In the first embodiment, the recess 81 provided in the range from the portion of the partition plate 57 located outside the radial DRr from the trailing edge plate portion 342 to the connection portion with the side wall portion 51 is exemplified. However, the recess 81 is not limited to this. The recessed portion 81 may be provided, for example, in a range from a portion of the partition plate 57 located outside the trailing edge plate portion 342 in the radial direction DRr to just before the connecting portion with the side wall portion 51.

(Second Embodiment)
Next, the second embodiment will be described with reference to FIGS. 4 and 5. The present embodiment mainly describes the parts different from the first embodiment.

As shown in FIGS. 4 and 5, the airflow turning portion 80 is not a recess 81, but an offset portion 82 offset to one side of the axial DRa with respect to the upstream portion 570, and the offset portion 82 and the upstream portion 570. It is configured to include a connection unit 83 for connecting to and. The partition plate 57 is provided with an offset portion 82 and a connecting portion 83 of the airflow turning portion 80, so that the partition plate 57 has a shape recessed upward as a whole.

The offset portion 82 and the connecting portion 83 are formed over the entire area without interruption in the circumferential direction centered on the fan axis CL. The offset portion 82 and the connecting portion 83 may be partially interrupted in the circumferential direction centered on the fan axis CL.

The offset portion 82 extends along the radial DRr. The offset portion 82 has a flat inner surface forming the first ventilation passage 531 and an inner surface forming the second ventilation passage 532. In the offset portion 82, the outer side of the radial DRr is connected to the side wall portion 51.

The connecting portion 83 extends along the axial DRa. In the connecting portion 83, the other side of the axial DRa is connected to the outside of the radial DRr of the upstream portion 570, and one side of the axial DRa is connected to the inside of the radial DRr of the offset portion 82.

Here, in the connecting portion 83, the height dimension Lh3 in the axial direction DRa is set so that the inner surface of the offset portion 82 forming the first ventilation passage 531 is flush with the upper surface of the front edge plate portion 341. .. As a result, the outside air flowing through the first ventilation passage 531 along the front edge plate portion 341 is formed at the corner portion 831 formed by the intersection of the inner surface forming the first ventilation passage 531 in the offset portion 82 and the connection portion 83. It is possible to prevent a collision.

In the partition plate 57 of the present embodiment, the corner portion formed by intersecting the upstream portion 570 and the connecting portion 83 is the change point CP. The inclination angle θs2 with respect to the upstream portion 570 at the change point CP is compared with the inclination angle θv2 with respect to the upstream portion 570 of the virtual line VL connecting the change point CP and the end portion of the trailing edge plate portion 342, as in the first embodiment. Is getting bigger.

The inclination angle θs2 is an angle formed by the tangent line TL at the above-mentioned change point CP and the upstream portion 570 extending along the radial DRr. In this example, since the tangent line TL extends along the axial direction DRa, the inclination angle θs2 is approximately 90 °. Further, the tilt angle θv2 of this example is about 15 ° to 30 °, which is sufficiently smaller than the tilt angle θs2.

The configuration other than the airflow turning portion 80 is the same as that of the first embodiment. The airflow turning portion 80 of the present embodiment includes an offset portion 82 and a connecting portion 83. Therefore, even if the inside air blown from the second wing passage 320 to the second ventilation passage 532 flows toward the gap between the trailing edge plate portion 342 and the partition plate 57, the direction of the inside air is shown in FIG. As shown by the arrow Fr2, the airflow turning portion 80 is turned away from the partition plate 57. Specifically, the inside air flowing toward the gap between the trailing edge plate portion 342 and the partition plate 57 along the offset portion 82 is turned away from the partition plate 57 by colliding with the connection portion 83.

In addition, the inclination angle θs2 with respect to the upstream portion 570 of the airflow turning portion 80 at the shape change point CP of the partition plate 57 with respect to the upstream portion 570 of the virtual line VL connecting the change point CP and the end portion of the trailing edge plate portion 342. It is larger than the tilt angle θv2. Therefore, as in the first embodiment, the inflow of the inside air into the first ventilation passage 531 is sufficiently suppressed.

(Modified example of the second embodiment)
In the second embodiment, the offset portion 82 extends along the radial DRr, but the offset portion 82 is not limited to this. The offset portion 82 may extend in a direction intersecting the radial DRr, for example. Further, the offset portion 82 may not be flat and may be at least partially curved.

In the second embodiment, the connection portion 83 extends along the axial DRa, but the connection portion 83 is not limited to this. The connecting portion 83 may extend in a direction intersecting the axial DRa, for example.

In the second embodiment, the height dimension Lh3 of the axial DRa of the connecting portion 83 is set so that the inner surface of the offset portion 82 forming the first ventilation passage 531 is flush with the upper surface of the front edge plate portion 341. However, the present invention is not limited to this.

The height dimension Lh3 of the axial DRa of the connecting portion 83 is set so that the inner surface of the offset portion 82 forming the first ventilation passage 531 is located on the other side of the axial DRa from the upper surface of the front edge plate portion 341. You may be. In this case, it is possible to prevent the outside air flowing through the first ventilation passage 531 along the front edge plate portion 341 from colliding with the corner portion 831.

Further, the height dimension Lh3 of the axial DRa of the connecting portion 83 is set so that the inner surface of the offset portion 82 forming the first ventilation passage 531 is located on one side of the axial DRa with respect to the upper surface of the front edge plate portion 341. It may be set.

(Third Embodiment)
Next, the third embodiment will be described with reference to FIGS. 6 and 7. The present embodiment mainly describes the parts different from the first embodiment.

As shown in FIGS. 6 and 7, the airflow turning portion 80 is not a recess 81, but is inclined so that the outside of the radial DRr is located on one side of the axial DRa as compared with the inside of the radial DRr. It is configured to include part 84. The partition plate 57 is provided with an inclined portion 84 of the airflow turning portion 80, so that the partition plate 57 has a shape recessed upward as a whole.

The inclined portion 84 is formed over the entire area without interruption in the circumferential direction centered on the fan axis CL. The inclined portion 84 may have a portion that is partially interrupted in the circumferential direction centered on the fan axis CL.

The inclined portion 84 extends along a direction intersecting each of the radial DRr and the axial DRa. The inclined portion 84 has a flat inner surface forming the first ventilation passage 531 and an inner surface forming the second ventilation passage 532. In the inclined portion 84, the outer side of the radial DRr is connected to the side wall portion 51.

In the partition plate 57 of the present embodiment, the corner portion formed by intersecting the upstream portion 570 and the inclined portion 84 is the change point CP. In the inclined portion 84, the inclination angle θs3 with respect to the upstream portion 570 at the change point CP is larger than the inclination angle θv3 with respect to the upstream portion 570 of the virtual line VL connecting the change point CP and the end portion of the trailing edge plate portion 342. There is.

The inclination angle θs3 is an angle formed by the tangent line TL at the above-mentioned change point CP and the upstream portion 570 extending along the radial DRr. In this example, the tilt angle θs3 is approximately 45 to 60 °. Further, the inclination angle θv3 of this example is about 15 ° to 30 °, which is smaller than the inclination angle θs3.

The configuration other than the airflow turning portion 80 is the same as that of the first embodiment. The airflow turning portion 80 of the present embodiment includes an inclined portion 84. Therefore, even if the inside air blown from the second wing passage 320 to the second ventilation passage 532 flows toward the gap between the trailing edge plate portion 342 and the partition plate 57, the direction of the inside air is shown in FIG. As shown by the arrow Fr3, the airflow turning portion 80 is turned away from the partition plate 57. Specifically, the inside air flowing toward the gap between the trailing edge plate portion 342 and the partition plate 57 is turned away from the partition plate 57 by flowing along the inclined portion 84.

In addition, the inclination angle θs3 with respect to the upstream portion 570 of the airflow turning portion 80 at the shape change point CP of the partition plate 57 with respect to the upstream portion 570 of the virtual line VL connecting the change point CP and the end portion of the trailing edge plate portion 342. It is larger than the tilt angle θv3. Therefore, as in the first embodiment, the inflow of the inside air into the first ventilation passage 531 is sufficiently suppressed.

(Modified example of the third embodiment)
In the third embodiment, the inclined portion 84 extending linearly is illustrated, but the present invention is not limited to this. The inclined portion 84 may extend in a curved shape, or may have a straight portion and a curved portion, respectively.

(Fourth Embodiment)
Next, the fourth embodiment will be described with reference to FIGS. 8 and 9. The present embodiment mainly describes the parts different from the first embodiment.

As shown in FIGS. 8 and 9, the airflow turning portion 80 is configured to include a rib 85 protruding from one side to the other side in the axial direction DRa instead of the recess 81. The rib 85 extends along the axial DRa. The rib 85 has a rectangular cross section.

The rib 85 is formed over the entire area without interruption in the circumferential direction centered on the fan axis CL. The rib 85 may be partially interrupted in the circumferential direction centered on the fan axis CL.

The rib 85 is formed in a portion of the partition plate 57 located outside the radial DRr with respect to the trailing edge plate portion 342. Specifically, the rib 85 is provided at a position closer to the trailing edge plate portion 342 than the side wall portion 51 in the radial DRr.

The rib 85 has a rib height La as a dimension in the axial direction DRa on the opposite side of the surface 542 of the partition plate 57 facing the trailing edge plate portion 342 and the facing surface 342a of the trailing edge plate portion 342 facing the partition plate 57. It is smaller than the distance Lb of the axial DRa from the surface 342b.

Further, in the rib 85, the rib height La is the distance Lc of the axial DRa between the surface 572 of the partition plate 57 facing the trailing edge plate portion 342 and the facing surface 342a of the trailing edge plate portion 342 facing the partition plate 57. Is bigger than.

In the partition plate 57 of the present embodiment, the corner portion formed by intersecting the upstream portion 570 and the rib 85 is the change point CP. In the rib 85, the inclination angle θs4 with respect to the upstream portion 570 at the change point CP is larger than the inclination angle θv4 with respect to the upstream portion 570 of the virtual line VL connecting the change point CP and the end portion of the trailing edge plate portion 342. ..

The inclination angle θs4 is an angle formed by the tangent line TL at the above-mentioned change point CP and the upstream portion 570 extending along the radial DRr. In this example, since the tangent line TL extends along the axial direction DRa, the inclination angle θs4 is approximately 90 °. Further, the tilt angle θv4 of this example is about 15 ° to 30 °, which is smaller than the tilt angle θs4.

The configuration other than the airflow turning portion 80 is the same as that of the first embodiment. The airflow turning portion 80 of the present embodiment includes a rib 85. Therefore, even if the inside air blown from the second wing passage 320 to the second ventilation passage 532 flows toward the gap between the trailing edge plate portion 342 and the partition plate 57, the direction of the inside air is shown in FIG. As shown by the arrow Fr4, the airflow turning portion 80 is turned away from the partition plate 57. Specifically, the inside air flowing toward the gap between the trailing edge plate portion 342 and the partition plate 57 is turned away from the partition plate 57 by colliding with the rib 85.

In addition, the inclination angle θs4 with respect to the upstream portion 570 of the airflow turning portion 80 at the shape change point CP of the partition plate 57 with respect to the upstream portion 570 of the virtual line VL connecting the change point CP and the end portion of the trailing edge plate portion 342. It is larger than the tilt angle θv4. Therefore, as in the first embodiment, the inflow of the inside air into the first ventilation passage 531 is sufficiently suppressed.

Further, the rib height La of the rib 85 is the axis of the surface 542 of the partition plate 57 facing the trailing edge plate portion 342 and the surface 342b of the trailing edge plate portion 342 opposite to the facing surface 342a facing the partition plate 57. It is smaller than the interval Lb of the direction DRa. According to this, since the rib 85 does not overlap with the second wing passage 320 in the radial DRr, it is possible to prevent the airflow blown out from the second wing passage 320 from colliding with the rib 85.

Further, the rib height La of the rib 85 is from the distance Lc of the axial DRa between the surface 542 of the partition plate 57 facing the trailing edge plate portion 342 and the facing surface 342a of the trailing edge plate portion 342 facing the partition plate 57. Is also getting bigger. According to this, since the rib 85 overlaps the gap between the trailing edge plate portion 342 and the partition plate 57 in the radial DRr, it becomes difficult for the inside air to flow into the gap between the trailing edge plate portion 342 and the partition plate 57.

(Modified example of the fourth embodiment)
In the fourth embodiment, the rib 85 is exemplified as the rib 85 extending along the axial direction DRa and having a rectangular cross-sectional shape, but the rib 85 is not limited to this. The rib 85 may extend in a direction intersecting the axial DRa, for example. Further, the rib 85 may have a triangular or arcuate cross-sectional shape, for example.

Further, the rib height La of the rib 85 may be equal to or greater than the distance Lb between one surface 572 of the partition plate 57 and the opposite surface 342b of the trailing edge plate portion 342, or one of the partition plates 57. The distance between the surface 572 and the facing surface 342a of the trailing edge plate portion 342 may be Lc or less.

(Fifth Embodiment)
Next, the fifth embodiment will be described with reference to FIG. The present embodiment mainly describes the parts different from the first embodiment.

As shown in FIG. 10, as the fan 30 of the present embodiment, a split plate 34A that extends as a whole along the radial DRr is adopted. That is, the dividing plate 34A is located not only on the outer portion of the radial DRr but also on the inner portion of the radial DRr on the other side of the axial DRa than the upstream edge portion 571.

Specifically, in the split plate 34A, the front edge plate portion 341, the trailing edge plate portion 342, and the intermediate plate portion 343 are lined up in a row along the radial DRr, and the whole thereof is more axial than the upstream edge portion 571. It is located on the other side of the direction DRa.

Other configurations are the same as in the first embodiment. The blower 1 of the present embodiment has a configuration common to or equal to that of the first embodiment, and the action and effect produced from the configuration can be obtained in the same manner as in the first embodiment.

(Modified example of the fifth embodiment)
In the fifth embodiment, the blower 1 in which the airflow turning portion 80 is composed of the recess 81 described in the first embodiment is illustrated, but the blower 1 is not limited to this. In the blower 1 of the fifth embodiment, for example, the airflow turning portion 80 may be configured as described in the second to fourth embodiments.

Further, in the split plate 34A, if at least the trailing edge plate portion 342 is located on the other side of the axial DRa from the upstream edge portion 571, what kind of form is the portion inside the trailing edge plate portion 342? You may be.

(Other embodiments)
Although the typical embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and can be variously modified as follows, for example.

In the above-described embodiment, the blower 1 is illustrated in which the air suction mode can be switched by the inside / outside air box 10, but the blower 1 is not limited to this. The blower 1 may be configured so that at least the inside / outside air mode can be realized. That is, the inside / outside air box 10 is not indispensable in the blower 1 of the present disclosure.

In the above-described embodiment, the filter 20 is arranged between the inside / outside air box 10 and the suction port forming portion 60, but the blower 1 is not limited to this. In the blower 1, for example, the filter 20 may be arranged inside the inside / outside air box 10, or the filter 20 may be omitted.

In the above-described embodiment, as the fan 30, the chord length of the second blade 32 is larger than the chord length of the first blade 31, but the fan 30 is not limited to this. In the fan 30, for example, the chord length of the second blade 32 may be equal to the chord length of the first blade 31.

In the above-described embodiment, the scroll casing 50 is exemplified as the casing for accommodating the fan 30, but the casing may be composed of a casing other than the scroll casing 50.

In the above-described embodiment, a plurality of forms have been described as the airflow turning section 80, but the airflow turning section 80 may be configured by combining these plurality of forms to the extent possible.

As described in the above-described embodiment, the airflow turning portion 80 has an inclination angle with respect to the upstream portion 570 at the change point CP and an inclination angle with respect to the upstream portion 570 of the virtual line VL connecting the change point CP and the end portion of the trailing edge plate portion 342. It is desirable, but not limited to, larger than. In the airflow turning portion 80, for example, the inclination angle of the change point CP with respect to the upstream portion 570 is smaller than the inclination angle of the virtual line VL connecting the change point CP and the end of the trailing edge plate portion 342 with respect to the upstream portion 570. You may.

In the above-described embodiment, an example in which the blower 1 of the present disclosure is applied to an air conditioner for a vehicle having two layers of inside and outside air capable of separating the outside air and the inside air and blowing them into the vehicle interior has been described. The applicable target can be applied to devices other than vehicle air conditioners.

Needless to say, in the above-described embodiment, the elements constituting the embodiment are not necessarily essential except when it is clearly stated that they are essential and when they are clearly considered to be essential in principle.

In the above-described embodiment, when numerical values such as the number, numerical value, amount, range, etc. of the components of the embodiment are mentioned, when it is clearly stated that it is particularly essential, and in principle, it is clearly limited to a specific number. Except as the case, it is not limited to the specific number.

In the above-described embodiment, when referring to the shape, positional relationship, etc. of a component or the like, the shape, positional relationship, etc., unless otherwise specified or limited in principle to a specific shape, positional relationship, etc. Etc. are not limited.

(Summary)
According to the first aspect shown in part or all of the above embodiments, the fan of the blower includes a plurality of first blades, a plurality of second blades, and a split plate. Inside the casing, a partition plate is provided that divides the air ventilation path into a first ventilation path into which the air outside the vehicle interior flows in and a second ventilation passage through which the air inside the vehicle interior flows. In the split plate, the trailing edge plate portion located on the outer side in the radial direction with respect to the first blade is radially outside the upstream edge portion facing the fan in the partition plate and axially from the upstream edge portion. It is positioned on the other side. The partition plate is provided with an airflow diversion portion that diverts the direction of the vehicle interior air toward the gap between the trailing edge plate portion and the partition plate in the direction away from the partition plate on the outer side in the radial direction from the trailing edge plate portion. There is.

According to the second viewpoint, the partition plate has an upstream portion from the upstream edge portion to the airflow turning portion. There is a change point where the shape changes between the upstream part and the airflow turning part, and the inclination angle of the airflow turning part at the change point with respect to the upstream part is upstream of the virtual line connecting the change point and the end of the trailing edge plate part. It is larger than the tilt angle with respect to the part.

According to this, the direction of the air inside the vehicle toward the gap between the trailing edge plate and the partition plate is changed by the airflow diversion part so as not to face the gap between the trailing edge plate and the partition plate. As a result, the inflow of vehicle interior air into the first ventilation path through the gap between the trailing edge plate portion and the partition plate is sufficiently suppressed.

According to the third viewpoint, the airflow turning portion includes a recessed portion that is recessed from the other side in the axial direction toward one side. According to this, the direction of the vehicle interior air is partitioned by flowing the vehicle interior air toward the gap between the trailing edge plate portion and the partition plate along the partition plate along the recess before reaching the gap. It is turned away from the board.

According to the fourth viewpoint, the airflow turning portion includes an offset portion offset to one side in the axial direction with respect to the upstream portion and a connecting portion connecting the offset portion and the upstream portion. According to this, when the vehicle interior air toward the gap between the trailing edge plate portion and the partition plate along the partition plate flows along the offset portion and the connection portion, the air is turned away from the partition plate.

According to the fifth viewpoint, the airflow turning portion includes an inclined portion inclined so that the outer side in the radial direction is located on one side in the axial direction as compared with the inner side in the radial direction. According to this, when the vehicle interior air toward the gap between the trailing edge plate portion and the partition plate along the partition plate flows along the inclined portion, the air is turned away from the partition plate.

According to the sixth viewpoint, the airflow turning portion includes a rib protruding toward the other side in the axial direction. According to this, the vehicle interior air toward the gap between the trailing edge plate portion and the partition plate along the partition plate collides with the rib and is turned away from the partition plate.

According to the seventh aspect, the rib height as an axial dimension is opposite to the surface of the partition plate facing the trailing edge plate portion and the surface of the trailing edge plate portion facing the partition plate. It is smaller than the axial distance from the surface. According to this, since the ribs do not overlap with the second wing passage in the radial direction, it is possible to prevent the airflow blown out from the second wing passage from colliding with the ribs.

Claims

It is a blower that can distinguish between the outside air and the inside air and inhale them at the same time.
A fan (30) that blows out air sucked from one side of the fan axis (CL) in the axial direction (DRa) in a direction away from the fan axis (30).
A casing (50) accommodating the fan and having a suction port (31) for air sucked into the fan on one side in the axial direction with respect to the fan.
Including a tubular portion (72) arranged inside the fan in the radial direction, the outside air of the vehicle interior is allowed to flow outside the tubular portion, and the air inside the vehicle interior is allowed to flow inside the tubular portion. A separation cylinder (70) for separating the outside air of the vehicle and the air inside the vehicle is provided.
The fan
A plurality of first blades (31) arranged around the fan axis,
A plurality of second blades (32) arranged around the fan axis and located on the other side in the axial direction with respect to the plurality of first blades.
The outdoor air and the plurality of second blades that connect the plurality of first blades and the plurality of second blades and flow through the first wing passage (310) formed between the plurality of first blades. Includes a split plate (34) that suppresses mixing with the vehicle interior air flowing through the second wing passage (320) formed between the blades.
On the inside of the casing, a ventilation path for air blown from the fan is formed on the outside in the radial direction with reference to the fan, and the first ventilation path (53) is used by the outside air to flow into the vehicle interior. A partition plate (57) is provided to partition the ventilation passage (531) and the second ventilation passage (532) into which the vehicle interior air flows.
The split plate has a trailing edge plate portion (342) located on the outer side in the radial direction with respect to the first blade.
The trailing edge plate portion has the radial outer end portion of the trailing edge plate portion outside the upstream edge portion (571) of the partition plate facing the fan, and the upstream edge portion. It is positioned on the other side in the axial direction from the portion, and is positioned on the other side in the axial direction.
The partition plate is directed to the outside of the trailing edge plate portion in the radial direction so that the direction of the vehicle interior air toward the gap between the trailing edge plate portion and the partition plate is directed away from the partition plate. A blower provided with an airflow turning portion (80).
The partition plate has an upstream portion (570) extending from the upstream edge portion to the airflow turning portion, and there is a change point where the shape changes between the upstream portion and the airflow turning portion, and at the change point. The inclination angle (θs) of the airflow turning portion with respect to the upstream portion is larger than the inclination angle (θv) of the virtual line connecting the change point and the downstream end portion of the trailing edge plate portion with respect to the upstream portion. The blower according to claim 1.
The blower according to claim 1 or 2, wherein the airflow turning portion includes a recessed portion (81) recessed from the other side in the axial direction toward one side.
The airflow turning portion includes an offset portion (82) offset to one side in the axial direction with respect to the upstream portion and a connecting portion (83) connecting the offset portion and the upstream portion. Item 2. The blower according to item 2.
The first or second aspect of the present invention, wherein the airflow turning portion includes an inclined portion (84) inclined so that the outer side in the radial direction is located on one side in the axial direction as compared with the inner side in the radial direction. Blower.
The blower according to claim 1 or 2, wherein the airflow turning portion includes a rib (85) protruding toward the other side in the axial direction.
The rib has a rib height as an axial dimension, which is opposite to the surface of the partition plate facing the trailing edge plate portion and the surface of the trailing edge plate portion facing the partition plate. The blower according to claim 6, which is smaller than the axial distance of the above.