JP7024743B2 - Centrifugal blower - Google Patents

Description

The present invention relates to a centrifugal blower.

Conventionally, two layers of inside and outside air are provided in the air conditioning unit to form a partition wall to form an upper air passage and a lower air passage, and to allow outside air to flow through the upper air passage and inside the vehicle interior to flow through the lower air passage. Air conditioners that can set the mode are known.

In such an air conditioner, the outside air and the inside air are introduced into the air conditioner unit by a centrifugal blower corresponding to the inside / outside air two-layer mode as described in Patent Document 1.

Specifically, the centrifugal blower has a scroll casing having an outside air introduction port for taking in the outside air of the vehicle, an inside air introduction port for taking in the inside air of the vehicle, and a discharge port for discharging air, and the inside of the scroll casing. It is equipped with an impeller placed in. Further, on the downstream side of the air flow from the impeller in the scroll casing, a partition wall extending in the outer diameter direction centering on the central axis of the impeller is arranged, and the upper air passage and the lower air are arranged by this partition wall. A passage is formed.

Then, according to the rotation of the impeller, the outside air taken in from the outside air introduction port is flowed to the outside of the separation cylinder and discharged from the upper air passage in the discharge port, and the inside air taken in from the inside air introduction port is flowed to the inside of the separation cylinder. It is configured to discharge from the lower air passage in the discharge port.

Further, the air discharged from the upper air passage is introduced into the upper air passage of the air conditioning unit, and the air discharged from the lower air passage is introduced into the lower air passage of the air conditioning unit.

Japanese Unexamined Patent Publication No. 2012-224205

In a vehicle equipped with the above-mentioned air conditioner, the mounting position of the centrifugal blower and the air conditioner unit differs depending on the vehicle type and the like. Therefore, the direction of the air discharged from the discharge port of the centrifugal blower is changed and introduced into the air conditioning unit. For example, when the position of the air introduction passage of the air conditioning unit is low with respect to the discharge port of the centrifugal blower, a duct portion is provided to change the direction of the air discharged from the centrifugal blower downward, and the centrifugal blower is provided through this duct portion. The air discharged from the discharge port of the air conditioning unit is introduced into the air introduction passage of the air conditioning unit.

However, in such a configuration in which the duct portion is provided, there is a problem that the pressure loss of the air introduced into the air introduction passage of the air conditioning unit becomes large.

In order to reduce the pressure loss of the air introduced into the air introduction passage of the air conditioning unit, it is necessary to increase the length of the duct part and gradually change the direction of the air discharged from the discharge port of the centrifugal blower. Conceivable.

However, if the length of the duct portion is increased in this way, there is a problem that the mounting space for mounting the air conditioner becomes large.

The present invention has been made in view of the above problems, and even if the position of the air introduction passage of the air conditioning unit is displaced in the rotation axis direction of the rotation axis with respect to the centrifugal blower, air is introduced into the air introduction passage of the air conditioning unit with low pressure loss. The purpose is to be able to introduce.

In order to achieve the above object, the invention according to claim 1 is a centrifugal blower that blows air into a first air introduction passage (41) and a second air introduction passage (42) provided in the air conditioning unit (40). A centrifugal fan (20) that blows air sucked from one side of the motor (10) in the rotation shaft (CL) direction toward the outside diameter of the rotation shaft, and a centrifugal fan are accommodated and blown from the centrifugal fan. A scroll casing (30) that forms a spiral air passage that collects the collected air, and a first air passage (Ap1) that is provided inside the scroll casing and has a spiral air passage on one side in the rotation axis direction and a rotation shaft. It is provided with a partition plate (35) that partitions the second air passage (Ap2) on the other side of the direction. Further, the scroll casing has a first discharge port (31) for discharging the air flowing through the first air passage to the first air introduction passage, and a second discharge port (31) for discharging the air flowing through the second air passage to the second air introduction passage. A discharge port (32) is formed, and the partition plate is spirally formed radially outward with the rotation axis of the centrifugal fan as the axis, and the end portion (35a) on the radial outer side of the rotation axis of the partition plate. Approaches the other side in the axial direction of the rotation axis from the winding start portion (351) of the partition plate to the winding end portion (352) located on the downstream side of the air flow of the air flowing in the scroll casing from the winding start portion of the partition plate. Is displaced to.

According to such a configuration, the partition plate is spirally formed on the radial outer side with the rotation axis of the centrifugal fan as the axis, and the radially outer end portion (35a) of the rotation axis of the partition plate is a partition. From the winding start part (351) of the plate to the winding end part (352) located on the downstream side of the air flow of the air flowing in the scroll casing from the winding start part of the partition plate, the displacement is displaced to the other side in the axial direction of the rotation axis. Therefore, even if the position of the air introduction passage of the air conditioning unit is displaced in the rotation axis direction of the rotation axis with respect to the centrifugal blower, air can be introduced into the air introduction passage of the air conditioning unit with low pressure loss.

Further, in order to achieve the above object, the invention according to claim 5 is a centrifuge that blows air into a first air introduction passage (41) and a second air introduction passage (42) provided in the air conditioning unit (40). A centrifugal fan (20) that accommodates a centrifugal fan (20) that blows air sucked from one side of the motor (10) in the rotation axis (CL) direction toward the outside diameter of the rotation axis, and a centrifugal fan. A scroll casing (30) that forms a spiral air passage that collects the air blown from the air, and a first air passage (Ap1) that is provided in the scroll casing and has a spiral air passage on one side in the rotation axis direction. It is provided with a partition plate (35) that partitions the second air passage (Ap2) on the other side in the rotation axis direction. Further, the scroll casing has a first discharge port (31) for discharging the air flowing through the first air passage to the first air introduction passage, and a second discharge port (31) for discharging the air flowing through the second air passage to the second air introduction passage. A discharge port (32) is formed, and the partition plate is spirally formed radially outward with the rotation axis of the centrifugal fan as the axis, and the end portion (35a) on the radial outer side of the rotation axis of the partition plate. Is one side in the axial direction of the rotation axis as it approaches the winding end portion (352) located on the downstream side of the air flow of the air flowing in the scroll casing from the winding start portion (351) of the partition plate to the winding start portion of the partition plate. Is displaced to.

According to such a configuration, the partition plate is spirally formed on the radial outer side with the rotation axis of the centrifugal fan as the axis, and the radially outer end portion (35a) of the rotation axis of the partition plate is a partition. From the winding start part (351) of the plate to the winding end part (352) located on the downstream side of the air flow of the air flowing in the scroll casing from the winding start part of the partition plate, the displacement is displaced to one side in the axial direction of the rotation axis. Therefore, even when the position of the air introduction passage of the air conditioning unit is displaced in the rotation axis direction of the rotation axis with respect to the centrifugal blower, air can be introduced into the air introduction passage of the air conditioning unit with low pressure loss.

The reference numerals in parentheses of each means described in this column and the scope of claims indicate the correspondence with the specific means described in the embodiments described later.

It is a figure which showed the schematic structure of the centrifugal blower which concerns on 1st Embodiment, and is sectional drawing which cut the centrifugal blower in the plane including the fan shaft of the centrifugal blower. FIG. 2 is a sectional view taken along line II-II in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. It is a figure which showed the air flow of the centrifugal blower which concerns on 1st Embodiment. It is a figure for demonstrating an issue. It is sectional drawing of the centrifugal blower which concerns on 2nd Embodiment, and is the figure which corresponds to FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the following embodiments, the parts that are the same or equal to each other are designated by the same reference numerals in the drawings.

(First Embodiment)
The centrifugal blower according to the first embodiment will be described with reference to FIGS. 1 to 4. The centrifugal blower 1 is arranged inside the instrument panel in front of the vehicle interior of the vehicle. On the downstream side of the air flow of the centrifugal blower 1, devices for controlling the air temperature such as an evaporator, a heater core, and an air mix door (not shown) are housed, and the first air introduction passage 41 and the second air introduction passage are accommodated. An air conditioning unit 40 having 42 is connected.

The centrifugal blower 1 can blow outside air to the first air introduction passage 41 formed in the upper part of the air conditioning unit 40, and blow the inside air to the second air introduction passage 42 formed in the lower part of the air conditioning unit 40. It is configured as an air two-phase flow centrifugal blower. The air introduced into the air conditioning unit 40 from the first air introduction passage 41 and the second air introduction passage 42 is temperature-controlled in the air conditioning unit 40 and then blown out into the vehicle interior of the vehicle.

The centrifugal blower 1 includes an inside / outside air switching box 50, an electric motor 10, a centrifugal fan 20, a scroll casing 30, and the like.

The inside / outside air switching box 50 has a casing 51, an inside / outside air switching door 52, and a filter 53.

The casing 51 is formed with an inside air introduction port 511 and an outside air introduction port 512. The inside air introduction port 511 is an opening for introducing the vehicle interior air into the casing 51. The outside air introduction port 512 is an opening for introducing the outside air of the vehicle interior into the casing 51. The casing 51 is integrated with the scroll casing 30, which will be described later, by mechanical fastening means such as bolts and screws. The casing 51 and the scroll casing 30 may be integrally molded.

The inside / outside air switching door 52 is rotatably supported with respect to the casing 51, and one of the inside air introduction port 511 and the outside air introduction port 512 is opened and the other is closed. The filter 53 removes impurities contained in the air introduced into the casing 51 from the inside air introduction port 511 and the outside air introduction port 512.

The motor 10 is a driving means for rotating the centrifugal fan 20. The motor 10 is fixed to the scroll casing 30, which will be described later.

The centrifugal fan 20 has a plurality of blades 21, a hub 22, and a separation plate 24. The plurality of blades 21 are arranged side by side in the circumferential direction about the rotation axis CL of the motor 10. The hub 22 connects the lower portions of the plurality of blades 21 and supports the lower portions of the plurality of blades 21 on the rotation shaft of the motor 10. The hub 22 transmits the rotational force of the motor 10 to the plurality of blades 21. At the center of the plurality of blades 21 supported by the hub 22, a space is formed in which air sucked from one side of the rotation axis CL of the motor 10 is introduced.

The separation plate 24 is an annular plate-shaped member provided at a substantially central portion in the longitudinal direction of the blade 21 and partitioning the air blown from the centrifugal fan 20 into a flow on one side and a flow on the other side in the CL direction of the rotation axis. The blade 21, hub 22, and separation plate 24 are integrally molded with resin.

The centrifugal fan 20 blows out the air sucked from one side of the rotation shaft CL of the motor 10 toward the outer diameter side.

The scroll casing 30 houses the motor 10 and the centrifugal fan 20, and forms a spiral air passage for collecting the air blown from the centrifugal fan 20.

The scroll casing 30 is formed with a suction port 33 and a suction port 34 for sucking air from the inside / outside air switching door 52. The suction port 33 and the suction port 34 are formed on the upper surface portion 303.

Inside the scroll casing 30, a cylindrical separation cylinder 36 and a spiral partition plate 35 are formed. The separation cylinder 36 is arranged so as to extend from the end of the scroll casing 30 on the inside / outside air switching box 50 side to the inner diameter side of the centrifugal fan 20.

The separation cylinder 36 passes the air flow introduced into the scroll casing 30 from the inside / outside air switching box 50 through the first air flow passing through the air passage outside the separation cylinder 36 and the air passage inside the separation cylinder 36. Separated from the second air flow.

As shown in FIG. 3, the scroll casing 30 has a bottom surface portion 301 that constitutes the bottom surface of the scroll casing 30, a side surface portion 302 that constitutes the side surface of the scroll casing 30, and an upper surface portion 303 that constitutes the upper surface of the scroll casing 30. is doing.

The air introduced into the scroll casing 30 from the suction port 34 is introduced into the air passage outside the separation cylinder 36, and the air introduced into the scroll casing 30 from the suction port 33 is introduced into the air passage inside the separation cylinder 36. Will be introduced to.

The end of the separation cylinder 36 on one side in the rotation axis CL direction is displaced from the rotation axis CL and spreads like a trumpet. Further, the end portion of the separation cylinder 36 on the other side of the rotation axis CL direction extends like a trumpet.

The partition plate 35 partitions the spiral air passage formed in the scroll casing 30 into a first air passage Ap1 on one side in the rotation axis CL direction and a second air passage Ap2 on the other side in the rotation axis CL direction.

The partition plate 35 is spirally formed on the outer side in the radial direction with the rotation axis CL of the centrifugal fan 20 as the axis. The partition plate 35 is integrally formed with the scroll casing 30 on the inner surface of the scroll casing 30.

A circular opening centered on the rotating shaft CL is formed in the central portion of the partition plate 35 centered on the rotating shaft CL. A centrifugal fan 20 is arranged in this opening. Further, the radial outer end portion 35a of the rotation shaft CL of the partition plate 35 is connected to the side surface portion 302 of the scroll casing 30. Further, the radially outer end portion 35a of the rotation shaft CL of the partition plate 35 flows from the winding start portion 351 of the partition plate 35 to the winding start portion 351 of the partition plate 35 through an air passage formed in the scroll casing 30. As it approaches the winding end portion 352 located on the downstream side of the air flow, the rotation shaft CL is gradually displaced to the other side in the axial direction.

Further, the partition plate 35 moves toward the other side in the axial direction of the rotary shaft CL as it approaches the radial outer end portion 35a of the rotary shaft CL of the partition plate 35 from the central portion of the partition plate 35 centered on the rotary shaft CL. It is gradually displaced. The two-dot chain line X in FIG. 3 represents the position of the lower end of the outer edge of the partition plate 35.

Further, on the surface of the scroll casing 30 facing the partition plate 35 in the first air passage Ap1, gradually toward the other side in the axial direction of the rotation axis CL as it approaches the downstream side of the air flow of the air flowing through the first air passage Ap1. A part to be displaced is formed.

Further, the surface of the scroll casing 30 facing the partition plate 35 in the second air passage Ap2 also gradually moves toward the other side in the axial direction of the rotation axis CL as it approaches the downstream side of the air flow of the air flowing through the second air passage Ap2. A part to be displaced is formed.

The scroll casing 30 is formed in a spiral shape around the centrifugal fan 20, and in the present embodiment, the passage cross-sectional areas of the first and second air passages Ap1 and Ap2 increase in a logarithmic spiral function with respect to the winding angle. It is set to do.

The scroll casing 30 has a first discharge port 31 that discharges air flowing through the first air passage Ap1 to the first air introduction passage 41, and a second discharge port 31 that discharges air flowing through the second air passage Ap2 to the second air introduction passage 42. 2 discharge ports 32 and are formed. The first discharge port 31 is directly connected to the first air introduction passage 41, and the second discharge port 32 is directly connected to the second air introduction passage 42.

Next, the operation of the centrifugal blower 1 will be described. Here, an example of implementing an operation mode called an inside / outside air two-layer flow mode will be described.

In the inside / outside air two-layer flow mode, as shown in FIG. 4, the inside / outside air switching door 52 is controlled so that the inside air introduction port 511 and the outside air introduction port 512 are opened respectively.

Then, when the centrifugal fan 20 rotates with the energization of the motor 10, the inside air in the vehicle interior is sucked into the inside / outside air switching box 50 from the inside / outside air introduction port 511, and the outside air outside the vehicle interior is sucked into the inside / outside air from the outside air introduction port 512. It is introduced in the switching box 50.

The inside air sucked into the inside / outside air switching box 50 is introduced into the scroll casing 30 from the suction port 33 after passing through the filter 53. The inside air further passes through the air passage inside the separation cylinder 36, the air passage on the other side of the separation plate 24 in the rotation axis CL direction, and the second air passage Ap2 on the other side of the partition plate 35 in the rotation axis CL direction. It is blown out from the discharge port 32 to the second air introduction passage 42 of the air conditioning unit 40.

Further, the outside air sucked into the inside / outside air switching box 50 is introduced into the scroll casing 30 from the suction port 34 after passing through the filter 53. This inside air passes through an air passage outside the separation cylinder 36, an air passage on one side of the separation plate 24 in the rotation axis CL direction, and a first air passage Ap1 on one side of the partition plate 35 in the rotation axis CL direction. It is blown out from 31 to the first air introduction passage 41 of the air conditioning unit 40.

In a vehicle equipped with such a centrifugal blower 1 and an air conditioning unit 40, the mounting positions of the centrifugal blower 1 and the air conditioning unit 40 differ depending on the vehicle type and the like. For this reason, the conventional centrifugal blower changes the direction of the air discharged from the discharge port and introduces the air into the air conditioning unit. For example, as shown in FIG. 5, when the positions of the air introduction passages 41 and 42 of the air conditioning unit are displaced to the other side in the rotation axis CL axis direction with respect to the discharge ports 31 and 32 of the centrifugal blower 1, the centrifugal blower 1 A duct portion 100 for changing the direction of the air discharged from the air conditioner 100 is provided, and the air discharged from the discharge port 80 of the centrifugal blower 1 through the duct portion 100 is sent to the air introduction passages 41 and 42 of the air conditioning unit 40. I am trying to introduce it.

However, in such a configuration in which the duct portion 100 is provided, there is a problem that the pressure loss of the air introduced into the air introduction passages 41 and 42 of the air conditioning unit 40 becomes large.

In order to reduce the pressure loss of the air introduced into the air introduction passages 41 and 42 of the air conditioning unit 40, the length of the duct portion 100 is lengthened to increase the length of the air discharged from the discharge ports 31 and 32 of the centrifugal blower 1. It is conceivable to gradually change the orientation.

However, if the length of the duct portion 100 is increased in this way, the mounting space for mounting the centrifugal blower 1 and the air conditioning unit 40 becomes large.

Therefore, the partition plate 35 of the centrifugal blower of the present embodiment is formed in a spiral shape on the radial outer side with the rotation axis CL of the centrifugal fan 20 as the axis, and is formed on the radial outer side of the rotation axis CL of the partition plate 35. The end portion 35a approaches the winding end portion 352 located on the downstream side of the air flow of the air flowing through the air passage formed in the scroll casing 30 from the winding start portion 351 of the partition plate 35 to the winding start portion 351 of the partition plate 35. As the rotation axis CL is displaced to the other side in the axial direction.

Therefore, the centrifugal blower 1 of the present embodiment can introduce the air introduced into the air introduction passages 41 and 42 of the air conditioning unit 40 with a low pressure loss without providing the duct portion 100 as shown in FIG. Is.

As described above, the centrifugal blower 1 of the present embodiment blows air to the first air introduction passage 41 and the second air introduction passage 42 provided in the air conditioning unit 40. Further, the centrifugal fan 20 that blows the air sucked from one side of the rotation shaft CL of the motor 10 toward the outside diameter of the rotation shaft CL and the centrifugal fan 20 are accommodated, and the air blown from the centrifugal fan 20 is blown. It includes a scroll casing 30 that forms a spiral air passage to be assembled. Further, a partition plate 35 provided in the scroll casing 30 is provided to partition the spiral air passage into the first air passage Ap1 on one side in the rotation axis direction and the second air passage Ap2 on the other side in the rotation axis direction. Further, in the scroll casing 30, the first discharge port 31 for discharging the air flowing through the first air passage Ap1 to the first air introduction passage 41 and the air flowing through the second air passage Ap2 are discharged to the second air introduction passage 42. The second discharge port 32 is formed. Further, the partition plate is spirally formed on the radially outer side with the rotation axis CL of the centrifugal fan 20 as the axis, and the radially outer end portion 35a of the rotation axis CL of the partition plate 35 is wound with the partition plate 35. The rotation shaft CL is displaced to the other side in the axial direction as it approaches the winding end portion 352 located on the downstream side of the air flow of the air flowing in the scroll casing 30 from the winding start portion of the partition plate 35 from the start portion 351.

According to such a configuration, the partition plate 35 is spirally formed on the radial outer side with the rotation axis CL of the centrifugal fan 20 as the axis, and the end portion 35a on the radial outer side of the rotation axis CL of the partition plate 35. Moves from the winding start portion 351 of the partition plate 35 to the other side in the axial direction of the rotation shaft CL as it approaches the winding end portion 352 located on the downstream side of the air flow of the air flowing in the scroll casing 30 from the winding start portion of the partition plate. Since it is displaced, it is possible to introduce air into the air introduction passage of the air conditioning unit with low pressure loss even if the position of the air introduction passage of the air conditioning unit is displaced in the direction of the rotation axis of the rotation axis with respect to the centrifugal blower. can.

Further, in the centrifugal blower of the present embodiment, as the radially outer end portion 35a of the rotary shaft CL of the partition plate 35 approaches the winding end portion 352 from the winding start portion 351 of the partition plate 35, the axial direction of the rotary shaft CL becomes It is gradually displaced to the other side. Therefore, it is possible to further introduce air into the air introduction passage of the air conditioning unit with a low pressure loss.

Further, the surface of the scroll casing 30 facing the partition plate 35 in the first air passage Ap1 is displaced to the other side in the axial direction of the rotation axis CL as it approaches the downstream side of the air flow of the air flowing through the first air passage Ap1. The site is formed. Therefore, it is possible to secure the flow path area of the first air passage.

Further, the surface of the scroll casing 30 facing the partition plate 35 in the second air passage Ap2 is displaced to the other side in the axial direction of the rotation axis CL as it approaches the downstream side of the air flow of the air flowing through the second air passage Ap2. The site is formed. Therefore, it is possible to secure the flow path area of the second air passage.

(Second Embodiment)
The centrifugal blower according to the second embodiment will be described with reference to FIG. In the centrifugal blower of the first embodiment, as shown in FIG. 3, the radial outer end portion 35a of the rotation shaft CL of the partition plate 35 is from the winding start portion 351 of the partition plate to the winding start portion of the partition plate. As it approaches the winding end portion 352 located on the downstream side of the air flow of air, it is gradually displaced to the other side in the axial direction of the rotation axis CL.

On the other hand, in the centrifugal blower of the present embodiment, as shown in FIG. 6, the radial outer end portion 35a of the rotation shaft CL of the partition plate 35 is wound from the winding start portion 351 of the partition plate 35 to the partition plate 35. As it approaches the winding end portion 352 located on the downstream side of the air flow of the air flowing in the scroll casing 30 from the start portion, the rotation shaft CL is gradually displaced to one side in the axial direction.

Further, the surface of the scroll casing 30 facing the partition plate 35 in the first air passage Ap1 is displaced to one side in the axial direction of the rotation axis CL as it approaches the downstream side of the air flow of the air flowing through the first air passage Ap1. The site is formed.

Further, the surface of the scroll casing 30 facing the partition plate 35 in the second air passage Ap2 is displaced to one side in the axial direction of the rotation axis CL as it approaches the downstream side of the air flow of the air flowing through the second air passage Ap2. The site is formed.

As described above, in the centrifugal blower of the present embodiment, the partition plate 35 is formed in a spiral shape on the outer side in the radial direction with the rotation axis CL of the centrifugal fan 20 as the axis. Further, the radial outer end portion 35a of the rotation shaft CL of the partition plate 35 is located on the downstream side of the air flow in the scroll casing 30 from the winding start portion 351 of the partition plate 35 to the winding start portion of the partition plate. As it approaches the winding end portion 352, it is displaced to one side in the axial direction of the rotating shaft CL.

According to such a configuration, the partition plate 35 is spirally formed on the radial outer side with the rotation axis CL of the centrifugal fan 20 as the axis, and the end portion 35a on the radial outer side of the rotation axis CL of the partition plate 35. As the winding start portion 351 of the partition plate 35 approaches the winding end portion 352 located on the downstream side of the air flow of the air flowing in the scroll casing 30 from the winding start portion of the partition plate, Since it is displaced, it is possible to introduce air into the air introduction passage of the air conditioning unit with low pressure loss even if the position of the air introduction passage of the air conditioning unit is displaced in the direction of the rotation axis of the rotation axis with respect to the centrifugal blower. can.

Further, in the centrifugal blower of the present embodiment, as the radially outer end portion 35a of the rotary shaft CL of the partition plate 35 approaches the winding end portion 352 from the winding start portion 351 of the partition plate 35, the axial direction of the rotary shaft CL becomes It is gradually displaced to one side. Therefore, it is possible to further introduce air into the air introduction passage of the air conditioning unit with a low pressure loss.

Further, the surface of the scroll casing 30 facing the partition plate 35 in the first air passage Ap1 is displaced to one side in the axial direction of the rotation axis CL as it approaches the downstream side of the air flow of the air flowing through the first air passage Ap1. The site is formed. Therefore, it is possible to secure the flow path area of the first air passage.

Further, the surface of the scroll casing 30 facing the partition plate 35 in the second air passage Ap2 is displaced to one side in the axial direction of the rotation axis CL as it approaches the downstream side of the air flow of the air flowing through the second air passage Ap2. The site is formed. Therefore, it is possible to secure the flow path area of the second air passage.

(Other embodiments)
(1) In each of the above embodiments, as the radially outer end portion 35a of the rotation shaft Cl of the partition plate 35 approaches the winding end portion 352 from the winding start portion 351 of the partition plate 35, the other end portion in the axial direction of the rotation shaft CL. It was configured to gradually displace to one side or one side. On the other hand, as the radially outer end portion 35a of the rotation shaft Cl of the partition plate 35 approaches the winding end portion 352 from the winding start portion 351 of the partition plate 35, the step is set to the other side or one of the rotation shaft CL in the axial direction. It may be configured to be displaced.

The present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the claims. Further, the above embodiments are not unrelated to each other, and can be appropriately combined unless the combination is clearly impossible. Further, in each of the above embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential except when it is clearly stated that they are essential or when they are clearly considered to be essential in principle. stomach. Further, in each of the above embodiments, when numerical values such as the number, numerical values, quantities, and ranges of the constituent elements of the embodiment are mentioned, when it is clearly stated that they are particularly essential, and when it is clearly limited to a specific number in principle. It is not limited to the specific number except when it is done. Further, in each of the above embodiments, when the material, shape, positional relationship, etc. of the constituent elements, etc. are referred to, except when specifically specified or when the material, shape, positional relationship, etc. are limited to a specific material, shape, positional relationship, etc. in principle. , The material, shape, positional relationship, etc. are not limited.

(summary)
According to the first aspect shown in part or all of the above embodiments, the centrifugal blower blows air into the first air introduction passage and the second air introduction passage provided in the air conditioning unit. In addition, the centrifugal blower accommodates a centrifugal fan that blows air sucked from one side in the direction of the rotation axis of the motor toward the outside diameter of the rotation axis, and a centrifugal fan, and collects the air blown from the centrifugal fan. It is equipped with a scroll casing that forms a spiral air passage. Further, it is provided in the scroll casing and includes a partition plate for partitioning the spiral air passage into a first air passage on one side in the rotation axis direction and a second air passage on the other side in the rotation axis direction. Further, the scroll casing has a first discharge port for discharging the air flowing through the first air passage to the first air introduction passage and a second discharge port for discharging the air flowing through the second air passage to the second air introduction passage. , Are formed. Further, the partition plate is spirally formed on the radially outer side with the rotation axis of the centrifugal fan as the axis, and the end portion on the radial outer side of the rotation axis of the partition plate is from the winding start portion of the partition plate to the partition plate. As it approaches the winding end located on the downstream side of the air flow of the air flowing in the scroll casing from the winding start portion, it is displaced to the other side in the axial direction of the rotation axis.

Further, according to the second aspect, in the centrifugal blower, the distal end portion of the rotation shaft of the partition plate is moved toward the other side in the axial direction of the rotation shaft as the end portion approaches the winding start portion to the winding end portion of the partition plate. It is gradually displaced. Therefore, it is possible to further introduce air into the air introduction passage of the air conditioning unit with a low pressure loss.

Further, according to the third aspect, the surface of the scroll casing facing the partition plate in the first air passage is on the other side of the axis of rotation in the axial direction as it approaches the downstream side of the air flow of the air flowing through the first air passage. A part that is displaced to is formed. Therefore, it is possible to secure the flow path area of the first air passage.

Further, according to the fourth aspect, the surface of the scroll casing facing the partition plate in the second air passage is on the other side of the axis of rotation in the axial direction as it approaches the downstream side of the air flow of the air flowing through the second air passage. A part that is displaced to is formed. Therefore, it is possible to secure the flow path area of the second air passage.

According to the fifth aspect shown in part or all of the above embodiments, the centrifugal blower blows air into the first air introduction passage and the second air introduction passage provided in the air conditioning unit. In addition, the centrifugal blower accommodates a centrifugal fan that blows air sucked from one side in the direction of the rotation axis of the motor toward the outside diameter of the rotation axis, and a centrifugal fan, and collects the air blown from the centrifugal fan. It is equipped with a scroll casing that forms a spiral air passage. Further, it is provided in the scroll casing and includes a partition plate for partitioning the spiral air passage into a first air passage on one side in the rotation axis direction and a second air passage on the other side in the rotation axis direction. Further, the scroll casing has a first discharge port for discharging the air flowing through the first air passage to the first air introduction passage and a second discharge port for discharging the air flowing through the second air passage to the second air introduction passage. , Are formed. Further, the partition plate is spirally formed on the radially outer side with the rotation axis of the centrifugal fan as the axis, and the end portion on the radial outer side of the rotation axis of the partition plate is from the winding start portion of the partition plate to the partition plate. As it approaches the winding end located on the downstream side of the air flow of the air flowing in the scroll casing from the winding start portion, it is displaced to one side in the axial direction of the rotation axis.

Further, according to the sixth aspect, in the centrifugal blower, the distal end portion of the rotation shaft of the partition plate is moved to one side in the axial direction of the rotation shaft as it approaches the winding start portion to the winding end portion of the partition plate. It is gradually displaced. Therefore, it is possible to further introduce air into the air introduction passage of the air conditioning unit with a low pressure loss.

Further, according to the seventh aspect, on the surface of the scroll casing facing the partition plate in the first air passage, one side in the axial direction of the rotation axis as the air flows downstream of the first air passage. A part that is displaced to is formed. Therefore, it is possible to secure the flow path area of the first air passage.

Further, according to the eighth viewpoint, on the surface of the scroll casing facing the partition plate in the second air passage, one side of the axis of rotation in the axial direction as the air flows in the second air passage toward the downstream side. A part that is displaced to is formed. Therefore, it is possible to secure the flow path area of the second air passage.

1 Centrifugal blower 10 Motor 20 Centrifugal fan 30 Scroll casing 31 1st discharge port 32 2nd discharge port 35 Partition plate 40 Air conditioning unit 41 1st air introduction passage 42 2nd air introduction passage

Claims (8)

A centrifugal blower that blows air to the first air introduction passage (41) and the second air introduction passage (42) provided in the air conditioning unit (40).
A centrifugal fan (20) that blows the air sucked from one side of the motor (10) in the rotation shaft (CL) direction toward the outside diameter of the rotation shaft, and
A scroll casing (30) that accommodates the centrifugal fan and forms a spiral air passage that collects the air blown from the centrifugal fan.
A partition plate provided in the scroll casing that partitions the spiral air passage into a first air passage (Ap1) on one side in the rotation axis direction and a second air passage (Ap2) on the other side in the rotation axis direction. 35) and
The scroll casing has a first discharge port (31) for discharging the air flowing through the first air passage to the first air introduction passage, and the air flowing through the second air passage with the second air introduction passage. A second discharge port (32) for discharging to the air is formed.
The partition plate is spirally formed on the outer side in the radial direction about the axis of rotation of the centrifugal fan.
The radial outer end (35a) of the rotation shaft of the partition plate is located downstream of the air flow in the scroll casing from the winding start portion (351) of the partition plate to the winding start portion of the partition plate. A centrifugal blower that is displaced to the other side of the axis of rotation in the axial direction as it approaches the winding end portion (352) located on the side. The radial outer end (35a) of the rotating shaft of the partition plate gradually moves toward the other side of the rotating shaft in the axial direction as it approaches the winding end (352) from the winding start portion (351) of the partition plate. The centrifugal blower according to claim 1, which is displaced to. On the surface of the scroll casing facing the partition plate in the first air passage, a portion that is displaced to the other side in the axial direction of the rotation axis as it approaches the downstream side of the air flow of the air flowing through the first air passage. The centrifugal blower according to claim 1 or 2, wherein is formed. On the surface of the scroll casing facing the partition plate in the second air passage, a portion that is displaced to the other side in the axial direction of the rotation axis as it approaches the downstream side of the air flow of the air flowing through the second air passage. The centrifugal blower according to any one of claims 1 to 3, wherein the centrifuge blower is formed. A centrifugal blower that blows air to the first air introduction passage (41) and the second air introduction passage (42) provided in the air conditioning unit (40).
A centrifugal fan (20) that blows the air sucked from one side of the motor (10) in the rotation shaft (CL) direction toward the outside diameter of the rotation shaft, and
A scroll casing (30) that accommodates the centrifugal fan and forms a spiral air passage that collects the air blown from the centrifugal fan.
A partition plate provided in the scroll casing that partitions the spiral air passage into a first air passage (Ap1) on one side in the rotation axis direction and a second air passage (Ap2) on the other side in the rotation axis direction. 35) and
The scroll casing has a first discharge port (31) for discharging the air flowing through the first air passage to the first air introduction passage, and the air flowing through the second air passage with the second air introduction passage. A second discharge port (32) for discharging to the air is formed.
The partition plate is spirally formed on the outer side in the radial direction about the axis of rotation of the centrifugal fan.
The end portion (35a) on the radial outer side of the rotation shaft of the partition plate is located on the downstream side of the air flow from the winding start portion (351) of the partition plate to the winding start portion of the partition plate. A centrifugal blower that is displaced to one side in the axial direction of the rotation axis as it approaches the portion (352). The radial outer end (35a) of the rotating shaft of the partition plate gradually moves toward one side of the rotating shaft in the axial direction as it approaches the winding end (352) from the winding start portion (351) of the partition plate. The centrifugal blower according to claim 5, which is displaced to. On the surface of the scroll casing facing the partition plate in the first air passage, a portion that is displaced to one side in the axial direction of the rotation axis as it approaches the downstream side of the air flow of the air flowing through the first air passage. The centrifugal blower according to claim 5 or 6, wherein the centrifugal blower is formed. On the surface of the scroll casing facing the partition plate in the second air passage, a portion that is displaced to one side in the axial direction of the rotation axis as it approaches the downstream side of the air flow of the air flowing through the second air passage. The centrifugal blower according to any one of claims 5 to 7, wherein the centrifugal blower is formed.

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