JP2020128712A - Centrifugal blower - Google Patents

Abstract

To guide air to an air introduction passage of an air conditioning unit with low pressure loss even when a position of the air introduction passage is deviated with respect to a centrifugal blower in a rotating shaft direction of the rotating shaft.SOLUTION: A centrifugal blower includes a scroll casing 30 forming a spiral air passage for collecting air blown out from a centrifugal fan 20, and a partitioning plate 35 for partitioning the spiral air passage into a first air passage Ap1 at one side in a rotating shaft direction and a second air passage Ap2 at the other side in the rotating shaft direction. The partitioning plate 35 is spirally formed at a radial outer side on a rotating shaft of the centrifugal fan 20 as a shaft center, and an end portion 35a at the radial outer side, of the rotating shaft of the partitioning plate is displaced to the other side in the axial direction of the rotating shaft from a winding start portion 351 to a winding end portion 352 of the partitioning plate 35.SELECTED DRAWING: Figure 3

Description

The present invention relates to a centrifugal blower.

Conventionally, a partition wall is provided in an air conditioning unit to form an upper air passage and a lower air passage, and outside air is made to flow to the upper air passage, and inside air in the vehicle compartment is made to flow to the lower air passage. Air conditioners that can set modes are known.

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

Specifically, the centrifugal blower is 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 a scroll casing. And an impeller arranged at. In addition, a partition wall that expands radially outward about the center axis of the impeller is arranged on the downstream side of the impeller in the scroll casing with respect to the air flow. A passage is formed.

Then, according to the rotation of the impeller, the outside air taken in from the outside air introduction port is flown 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 made to flow inside the separation cylinder. The air is discharged from the lower air passage of 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.

JP, 2012-224205, A

In a vehicle equipped with the air conditioner as described above, the mounting positions of the centrifugal blower and the air conditioning unit differ 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 section is provided to change the direction of the air discharged from the centrifugal blower to the lower side, and the centrifugal blower is provided via this duct section. The air discharged from the discharge port is introduced into the air introduction passage of the air conditioning unit.

However, such a configuration in which the duct portion is provided has 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 possible to lengthen the duct and gradually change the direction of the air discharged from the outlet of the centrifugal blower. Conceivable.

However, when 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. Even when the position of the air introduction passage of the air conditioning unit with respect to the centrifugal blower is deviated in the rotation axis direction of the rotation shaft, 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 for blowing air to a first air introduction passage (41) and a second air introduction passage (42) provided in an air conditioning unit (40). Therefore, a centrifugal fan (20) that blows air sucked from one side of the motor (10) in the rotation axis (CL) direction toward the radially outer side of the rotation axis, and a centrifugal fan is housed 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 in the scroll casing and that has the spiral air passage on one side in the rotation axis direction and the rotation shaft. A partition plate (35) for partitioning the second air passage (Ap2) on the other side in the direction. 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. The discharge port (32) is formed, and the partition plate is formed in a spiral shape radially outward with the rotation axis of the centrifugal fan as an axis, and the end portion (35a) radially outside the rotation axis of the partition plate. Is the other side in the axial direction of the rotating shaft as the winding start portion (351) of the partition plate 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 of the partition plate. Is displaced.

According to such a configuration, the partition plate is formed in a spiral shape radially outward with the rotation axis of the centrifugal fan as an axis, and the end portion (35a) radially outside the rotation axis of the partition plate is the partition wall. As the winding start portion (351) of the partition plate 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 of the partition plate, it is displaced to the other side in the axial direction of the rotating shaft. Therefore, even if the position of the air introduction passage of the air conditioning unit with respect to the centrifugal blower deviates in the direction of the rotation axis of the rotary shaft, 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-mentioned object, the invention according to claim 5 is the centrifugal for blowing 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), which is a blower and stores the centrifugal fan (20) that blows air sucked from one side of the rotation axis (CL) direction of the motor (10) toward the radially outer side of the rotation axis, and the centrifugal fan. A scroll casing (30) that forms a spiral air passage that collects air blown from the air, and a spiral air passage that is provided in the scroll casing and that is the first air passage (Ap1) on one side in the rotation axis direction. A partition plate (35) for partitioning the second air passage (Ap2) on the other side in the rotation axis direction. 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. The discharge port (32) is formed, and the partition plate is formed in a spiral shape radially outward with the rotation axis of the centrifugal fan as an axis, and the end portion (35a) radially outside the rotation axis of the partition plate. Is closer to the winding end portion (352) located downstream of the partition plate winding start portion (351) than the winding start portion of the partition plate in the air flow of the air flowing in the scroll casing. Is displaced.

According to such a configuration, the partition plate is formed in a spiral shape radially outward with the rotation axis of the centrifugal fan as an axis, and the end portion (35a) radially outside the rotation axis of the partition plate is the partition wall. As the winding start portion (351) of the plate 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 of the partition plate, it is displaced to one side in the axial direction of the rotating shaft. Therefore, even if the position of the air introduction passage of the air conditioning unit with respect to the centrifugal blower deviates in the direction of the rotation axis of the rotary shaft, air can be introduced into the air introduction passage of the air conditioning unit with low pressure loss.

It should be noted that the reference numerals in parentheses for each means described in this column and in the claims indicate the correspondence with the specific means described in the embodiments described later.

It is the figure which showed the schematic structure of the centrifugal fan which concerns on 1st Embodiment, Comprising: It is sectional drawing which cut|disconnected the centrifugal fan by the plane containing the fan shaft of a centrifugal fan. FIG. 2 is a sectional view taken along line II-II in FIG. 1. FIG. 3 is a sectional view taken along line III-III in FIG. 1. It is the figure which showed the flow of the air of the centrifugal fan which concerns on 1st Embodiment. It is a figure for demonstrating a subject. It is sectional drawing of the centrifugal fan which concerns on 2nd Embodiment, Comprising: It is a figure corresponding to FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following respective embodiments, the same or equivalent portions 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 the front of the passenger compartment of the vehicle. On the downstream side of the air flow of the centrifugal blower 1, devices for adjusting the air temperature such as an evaporator, a heater core, and an air mix door, which are not shown, are housed, and the first air introduction passage 41 and the second air introduction passage are provided. An air conditioning unit 40 having 42 is connected.

The centrifugal blower 1 can blow outside air into the first air introduction passage 41 formed in the upper portion of the air conditioning unit 40 and can blow inside air into the second air introduction passage 42 formed in the lower portion of the air conditioning unit 40. It is configured as a two-layer air centrifugal fan. The air introduced into the air conditioning unit 40 from the first air introduction passage 41 and the second air introduction passage 42 is adjusted in temperature in the air conditioning unit 40 and then blown out into the passenger compartment 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 portion that introduces vehicle interior air into the casing 51. The outside air introduction port 512 is an opening for introducing outside air into the casing 51 into the casing 51. The casing 51 is integrated with a scroll casing 30 described later by mechanical fastening means such as bolts and screws. The casing 51 and the scroll casing 30 may be integrally formed.

The inside/outside air switching door 52 is rotatably supported with respect to the casing 51, and opens one of the inside air introduction port 511 and the outside air introduction port 512 and closes the other. 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 drive unit that rotates the centrifugal fan 20. The motor 10 is fixed to a scroll casing 30 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 around the rotation axis CL of the motor 10. The hub 22 connects the lower parts of the plurality of blades 21 and supports the lower parts of the plurality of blades 21 to the rotation shaft of the motor 10. The hub 22 transmits the rotational force of the motor 10 to the plurality of blades 21. In the center of the plurality of blades 21 supported by the hub 22, a space into which air sucked from one side of the motor 10 in the rotation axis CL direction is introduced is formed.

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

The centrifugal fan 20 blows out air sucked from one side in the rotation axis CL direction of the motor 10 toward the radially outer 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 an inlet 33 and an inlet 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 toward the inner diameter side of the centrifugal fan 20.

The separation cylinder 36 allows a flow of air introduced from the inside/outside air switching box 50 into the scroll casing 30 to pass through a first air flow passing through an air passage outside the separation cylinder 36 and an air passage inside the separation cylinder 36. Separated into a second air stream.

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

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

One end of the separation cylinder 36 on the one side in the rotation axis CL direction is displaced from the rotation axis CL and spreads in a trumpet shape. The end of the separation cylinder 36 on the other side in the direction of the rotation axis CL is flared in a trumpet shape.

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 formed in a spiral shape radially outward with the rotation axis CL of the centrifugal fan 20 as an axis. The partition plate 35 is formed integrally with the scroll casing 30 on the inner surface of the scroll casing 30.

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

Further, the partition plate 35 moves toward the other side in the axial direction of the rotation shaft CL as it approaches the radially outer end 35a of the rotation shaft CL of the partition plate 35 from the central portion of the partition plate 35 centering on the rotation 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, the air gradually flows to the other side in the axial direction of the rotating shaft CL as it approaches the downstream side of the air flow of the air flowing through the first air passage Ap1. A displacement part is formed.

Further, the surface of the scroll casing 30 that faces the partition plate 35 in the second air passage Ap2 is gradually moved to the other side in the axial direction of the rotating shaft CL as it approaches the downstream side of the air flow of the air flowing through the second air passage Ap2. A displacement part 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 logarithmically with respect to the winding angle. Is set to.

The scroll casing 30 has a first discharge port 31 for discharging the air flowing through the first air passage Ap1 to the first air introduction passage 41 and a second discharge port 31 discharging the air flowing through the second air passage Ap2 to the second air introduction passage 42. 2 discharge ports 32 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.

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

The inside air sucked into the inside/outside air switching box 50 passes through the filter 53 and is then introduced into the scroll casing 30 through the suction port 33. The inside air further passes through an air passage inside the separation tube 36, an air passage on the other side of the separation plate 24 in the rotation axis CL direction, and a second air passage Ap2 on the other side of the partition plate 35 in the rotation axis CL direction to the second side. 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 through the suction port 34 after passing through the filter 53. The inside air passes through an air passage outside the separation cylinder 36, an air passage on one side in the rotation axis CL direction of the separation plate 24, and a first air passage Ap1 on one side in the rotation axis CL direction of the partition plate 35, and the first discharge port. The air is blown 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. Therefore, 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 from the discharge ports 31 and 32 of the centrifugal blower 1 to the other side in the rotation axis CL axis direction, the centrifugal blower 1 The duct portion 100 for changing the direction of the air discharged from the lower side is provided, and the air discharged from the discharge port 80 of the centrifugal blower 1 via the duct portion 100 is supplied to the air introduction passages 41, 42 of the air conditioning unit 40. I am trying to introduce it.

However, such a configuration in which the duct portion 100 is provided has 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 increased so that the air discharged from the discharge ports 31 and 32 of the centrifugal blower 1 is reduced. It is possible to gradually change the direction.

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 according to the present embodiment is formed in a spiral shape radially outward with the rotation axis CL of the centrifugal fan 20 as an axis, and is located outside the rotation axis CL of the partition plate 35 in the radial direction. The end portion 35a approaches from the winding start portion 351 of the partition plate 35 to 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. Accordingly, it is displaced to the other side in the axial direction of the rotation axis CL.

Therefore, the centrifugal blower 1 of the present embodiment can introduce the air introduced into the air introduction passages 41, 42 of the air conditioning unit 40 with low pressure loss without providing the duct part 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 motor 10 in the direction of the rotation axis CL toward the radially outer direction of the rotation axis CL, the centrifugal fan 20 is housed, and the air blown from the centrifugal fan 20 is supplied. And 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 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. 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 formed in a spiral shape radially outward with the rotation axis CL of the centrifugal fan 20 as an axis, and an end portion 35 a of the partition plate 35 radially outside the rotation axis CL is wound around the partition plate 35. As the winding end portion 352 located on the downstream side of the scroll casing 30 from the winding start portion of the partition plate 35, the winding end portion 352 is displaced from the starting portion 351 to the other side in the axial direction of the rotating shaft CL.

According to such a configuration, the partition plate 35 is formed in a spiral shape radially outward with the rotation axis CL of the centrifugal fan 20 as an axis, and the end portion 35a of the partition plate 35 radially outside of the rotation axis CL. Is closer to the other end in the axial direction of the rotary shaft CL as the winding start portion 351 of the partition plate 35 approaches the winding end portion 352 located on the air flow downstream side 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 when the position of the air introduction passage of the air conditioning unit is displaced with respect to the centrifugal blower in the direction of the rotation axis of the rotary shaft. it can.

Further, in the centrifugal blower of the present embodiment, as the radially outer end portion 35a of the rotation axis CL of the partition plate 35 approaches the winding start portion 351 and the winding end portion 352 of the partition plate 35, the axial direction of the rotation axis CL is increased. 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 low pressure loss.

Further, on the surface of the scroll casing 30 facing the partition plate 35 in the first air passage Ap1, the air flowing through the first air passage Ap1 is displaced to the other side in the axial direction of the rotating shaft CL as it approaches the downstream side of the air flow. The part is formed. Therefore, the flow passage area of the first air passage can be secured.

Further, on the surface of the scroll casing 30 facing the partition plate 35 in the second air passage Ap2, the air flowing through the second air passage Ap2 is displaced to the other side in the axial direction of the rotating shaft CL as it approaches the downstream side of the air flow. The part is formed. Therefore, the flow passage area of the second air passage can be secured.

(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 end portion 35a of the partition plate 35 on the radially outer side of the rotation axis CL 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, the air gradually displaces to the other side in the axial direction of the rotating shaft CL.

On the other hand, in the centrifugal blower of the present embodiment, as shown in FIG. 6, the end portion 35a of the partition plate 35 on the radially outer side of the rotation axis CL is wound from the winding start portion 351 of the partition plate 35 to the partition plate 35. The air gradually flows to one side in the axial direction of the rotating 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 beginning portion.

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

Further, on the surface of the scroll casing 30 facing the partition plate 35 in the second air passage Ap2, the air flowing through the second air passage Ap2 is displaced toward one side in the axial direction of the rotating shaft CL as it approaches the downstream side of the air flow. The part is formed.

As described above, in the centrifugal blower of the present embodiment, the partition plate 35 is formed in a spiral shape radially outward with the rotation axis CL of the centrifugal fan 20 as the axis. Further, the end portion 35a of the partition plate 35 on the radially outer side of the rotation axis CL is positioned from the winding start portion 351 of the partition plate 35 to the air flow downstream side of the air flowing in the scroll casing 30 from 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 formed in a spiral shape radially outward with the rotation axis CL of the centrifugal fan 20 as an axis, and the end portion 35a of the partition plate 35 radially outside of the rotation axis CL. Is closer to the one end in the axial direction of the rotary shaft CL 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 when the position of the air introduction passage of the air conditioning unit is displaced with respect to the centrifugal blower in the direction of the rotation axis of the rotary shaft. it can.

Further, in the centrifugal blower of the present embodiment, as the radially outer end portion 35a of the rotating shaft CL of the partition plate 35 approaches the winding start portion 351 of the partition plate 35 to the winding end portion 352, the axial direction of the rotating shaft CL is increased. 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 low pressure loss.

Further, on the surface of the scroll casing 30 facing the partition plate 35 in the first air passage Ap1, the air flowing through the first air passage Ap1 is displaced to one side in the axial direction of the rotating shaft CL as it approaches the downstream side of the air flow. The part is formed. Therefore, the flow passage area of the first air passage can be secured.

Further, on the surface of the scroll casing 30 facing the partition plate 35 in the second air passage Ap2, the air flowing through the second air passage Ap2 is displaced toward one side in the axial direction of the rotating shaft CL as it approaches the downstream side of the air flow. The part is formed. Therefore, the flow passage area of the second air passage can be secured.

(Other embodiments)
(1) In each of the above-described embodiments, as the radially outer end portion 35a of the rotating shaft Cl of the partition plate 35 approaches the winding start portion 351 of the partition plate 35 to the winding end portion 352, the other axial direction of the rotating shaft CL is increased. It is configured to be gradually displaced to the side or one side. On the other hand, as the end portion 35a of the partition plate 35 on the radially outer side of the rotation axis Cl approaches the winding start portion 351 of the partition plate 35 toward the winding end portion 352, the other end or one of the rotation axis CL in the axial direction is stepped. It may be configured to be displaced.

It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope described in the claims. Further, the above embodiments are not unrelated to each other, and can be appropriately combined unless a combination is obviously impossible. Further, in each of the above-mentioned embodiments, it is needless to say that the elements constituting the embodiment are not necessarily indispensable except when explicitly indicated as being indispensable and when it is considered to be indispensable in principle. Yes. Further, in each of the above-mentioned embodiments, when numerical values such as the number of components of the embodiment, numerical values, amounts, ranges, etc. are mentioned, it is clearly limited to a particular number when explicitly stated to be essential. It is not limited to the specific number except for the case where it is done. Further, in each of the above-mentioned embodiments, when referring to the material, shape, positional relationship, etc. of the constituent elements, etc., unless specifically stated or in principle limited to a specific material, shape, positional relationship, etc. However, the material, shape, positional relationship, etc. are not limited.

(Summary)
According to the first aspect shown in part or all of each of the above-described embodiments, the centrifugal blower blows air to the first air introduction passage and the second air introduction passage provided in the air conditioning unit. Further, the centrifugal blower accommodates the centrifugal fan that blows the air sucked from one side of the rotation axis of the motor toward the radial outside of the rotation axis, the centrifugal fan, and collects the air blown from the centrifugal fan. And a scroll casing forming a spiral air passage. Further, a partition plate provided in the scroll casing 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 is provided. 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 formed in a spiral shape radially outward with the rotation axis of the centrifugal fan as the axis, and the radially outer end of the rotation axis of the partition plate extends from the winding start portion of the partition plate to the partition plate. The air is displaced to the other side in the axial direction of the rotary shaft as it approaches the winding end portion located downstream of the winding start portion of the air flowing in the scroll casing.

Further, according to the second aspect, in the centrifugal blower, the radially outer end of the rotating shaft of the partition plate moves to the other side in the axial direction of the rotating shaft as the winding start part of the partition plate approaches the winding end part. It is gradually displaced. Therefore, it is possible to further introduce air into the air introduction passage of the air conditioning unit with low pressure loss.

According to a third aspect, on the surface of the scroll casing facing the partition plate in the first air passage, the other side in the axial direction of the rotating shaft approaches the air flow downstream side of the air flowing through the first air passage. A portion that is displaced to is formed. Therefore, the flow passage area of the first air passage can be secured.

According to a fourth aspect, on the surface of the scroll casing facing the partition plate in the second air passage, the other side in the axial direction of the rotating shaft approaches the air flow downstream side of the air flowing through the second air passage. A portion that is displaced to is formed. Therefore, the flow passage area of the second air passage can be secured.

According to the fifth aspect shown in part or all of each of the above embodiments, the centrifugal blower blows air to the first air introduction passage and the second air introduction passage provided in the air conditioning unit. Further, the centrifugal blower accommodates the centrifugal fan that blows the air sucked from one side of the rotation axis of the motor toward the radial outside of the rotation axis, the centrifugal fan, and collects the air blown from the centrifugal fan. And a scroll casing forming a spiral air passage. Further, a partition plate provided in the scroll casing 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 is provided. 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 formed in a spiral shape radially outward with the rotation axis of the centrifugal fan as the axis, and the radially outer end of the rotation axis of the partition plate extends from the winding start portion of the partition plate to the partition plate. As the air flows in the scroll casing from the winding start portion toward the winding end portion located on the downstream side of the air flow, the air is displaced to one side in the axial direction of the rotating shaft.

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

According to a 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 rotating shaft approaches the air flow downstream side of the air flowing through the first air passage. A portion that is displaced to is formed. Therefore, the flow passage area of the first air passage can be secured.

According to an eighth aspect, on the surface of the scroll casing facing the partition plate in the second air passage, one side in the axial direction of the rotating shaft approaches the air flow downstream side of the air flowing through the second air passage. A portion that is displaced to is formed. Therefore, the flow passage area of the second air passage can be secured.

1 Centrifugal Blower 10 Motor 20 Centrifugal Fan 30 Scroll Casing 31 First Discharge Port 32 Second Discharge Port 35 Partition Plate 40 Air Conditioning Unit 41 First Air Introduction Passage 42 Second Air Introduction Passage

Claims (8)

A centrifugal blower for blowing air to a first air introduction passage (41) and a second air introduction passage (42) provided in an air conditioning unit (40),
A centrifugal fan (20) for blowing the air sucked from one side of the motor (10) in the rotation axis (CL) direction toward the radially outer side of the rotation axis;
A scroll casing (30) for accommodating the centrifugal fan and forming a spiral air passage for collecting the air blown from the centrifugal fan;
A partition plate provided in the scroll casing for partitioning 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 into the first air introduction passage, and the air flowing through the second air passage through the second air introduction passage. A second discharge port (32) for discharging to
The partition plate is formed in a spiral shape radially outward with the rotation axis of the centrifugal fan as an axis.
An end portion (35a) of the partition plate on the outer side in the radial direction of the rotary shaft is downstream of an air flow of the air flowing in the scroll casing from a winding start portion (351) of the partition plate to a winding start portion of the partition plate. The centrifugal blower which is displaced to the other side in the axial direction of the rotating shaft as it approaches the winding end portion (352) located on the side. The end portion (35a) of the partition plate on the radially outer side of the rotation shaft gradually moves to the other side in the axial direction of the rotation shaft as the winding start portion (351) of the partition plate approaches the winding end portion (352). The centrifugal blower according to claim 1, wherein the centrifugal blower is displaced. On the surface of the scroll casing facing the partition plate in the first air passage, a portion displaced toward the other side in the axial direction of the rotating shaft as it approaches the air flow downstream side of the air flowing through the first air passage. The centrifugal blower according to claim 1, wherein the centrifugal blower is formed. On the surface of the scroll casing facing the partition plate in the second air passage, a portion displaced toward the other side in the axial direction of the rotating shaft as it approaches the air flow downstream side of the air flowing through the second air passage. The centrifugal blower according to claim 1, wherein the centrifugal blower is formed. A centrifugal blower for blowing air to a first air introduction passage (41) and a second air introduction passage (42) provided in an air conditioning unit (40),
A centrifugal fan (20) for blowing the air sucked from one side of the motor (10) in the rotation axis (CL) direction toward the radially outer side of the rotation axis;
A scroll casing (30) for accommodating the centrifugal fan and forming a spiral air passage for collecting the air blown from the centrifugal fan;
A partition plate provided in the scroll casing for partitioning 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 into the first air introduction passage, and the air flowing through the second air passage through the second air introduction passage. A second discharge port (32) for discharging to
The partition plate is formed in a spiral shape radially outward with the rotation axis of the centrifugal fan as an axis.
An end portion (35a) of the partition plate on the radially outer side of the rotating shaft is located at a winding end portion located downstream of the winding start portion (351) of the partition plate from the winding start portion of the partition plate. A centrifugal blower that is displaced to one side in the axial direction of the rotating shaft as it approaches the portion (352). The end portion (35a) of the partition plate on the outer side in the radial direction of the rotation shaft gradually moves toward one side in the axial direction of the rotation shaft as it approaches from the winding start portion (351) to the winding end portion (352) of the partition plate. The centrifugal blower according to claim 5, wherein the centrifugal blower is displaced. 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 rotating shaft as it approaches the air flow downstream side of the air flowing through the first air passage. The centrifugal blower according to claim 5, 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 rotating shaft as it approaches the air flow downstream side of the air flowing in the second air passage. The centrifugal blower according to claim 5, wherein the centrifugal blower is formed.

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