JP4192382B2 - Ventilation unit for vehicle air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blower unit of an air conditioner for a vehicle, and more particularly to an airtight structure when introducing outside air (outside air) into a first air passage and inside air (inside air) into a second air passage. It is.
[0002]
[Prior art]
Conventionally, as a blower unit for a vehicle air conditioner that can introduce vehicle exterior air (hereinafter referred to as outside air) into the first air passage and vehicle interior air (hereinafter referred to as interior air) into the second air passage, There exists what was described in 20451 gazette. This conventional apparatus is intended to achieve both a heating capacity improvement in winter and an antifogging improvement of the window glass. Specifically, the inside of the air conditioning case is divided into two passages, a relatively high temperature inside air is introduced into one passage, the inside air is blown to the foot outlet through this passage, and a relatively low humidity outside air is introduced into the other passage. The outside air is introduced into the defroster outlet through this passage.
[0003]
In the conventional apparatus, a centrifugal fan is provided in each of the upstream portions of the two passages in a scroll-like casing, and each centrifugal fan is disposed with a predetermined space in the rotation axis direction. As described above, the two partition portions facing each other are provided so as to be integrally rotated by one electric motor. And in the said casing, in order to form said two channel | path, the partition wall of the flat plate which partitions an internal air channel into two is formed. And this partition wall is formed so that it may be inserted in predetermined space between the said 2 partition parts so that rotation of a fan may not be disturbed along the outer periphery of a fan. Accordingly, since the predetermined space has a labyrinth structure, the length of the air passage in this space is set to be long so that the friction loss is increased and the passage is made difficult to reduce the mixing of the outside air and the inside air.
[0004]
[Problems to be solved by the invention]
However, in the conventional configuration, in order to extend the partition portion of the centrifugal fan in the radial direction, there is a restriction that the contact portion does not come into contact with the nose portion at the start of winding of the casing formed in a scroll shape. It is difficult to form with the labyrinth structure, and the effect of reducing mixing of outside air and inside air is small.
[0005]
Further, when the vehicle is traveling at a high speed with a low rotational speed of the centrifugal fan, the vehicle speed increases and the ram pressure (the air resistance received when the vehicle moves forward) is increased on the first passage side where the outside air is introduced. Is directly received, resulting in a high pressure and a pressure difference from the second passage side where the inside air is introduced. As a result, a relatively low temperature outside air is introduced to the inside air via the predetermined space, and as a result, the comfort of foot heating for the passenger is impaired.
[0006]
Further, as described above, when outside air is mixed into the inside air side, the second passage side becomes high pressure, and even in the space between the casing surface facing the partition wall and the suction surface side of the centrifugal fan, the pressure difference from the inside air suction side As a result, outside air may enter the passenger compartment and cause discomfort to the passengers.
[0007]
Then, the objective of this invention is providing the ventilation unit of the vehicle air conditioner which can further reduce mixing of external air and internal air in view of the said point.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the following technical means are adopted.
[0009]
In the inventions of claims 1 to 3 and 5 to 7 , the scroll casing (3a) constituting the scroll-shaped air passage and the centrifugal type housed in the scroll casing (3a) and sucking air from both sides in the rotation axis direction The first air passage (5a) through which the vehicle exterior air (outside air) flows and the vehicle interior air (inside air) flow through the fan (6) and the scroll casing (3a) in the rotational axis direction of the centrifugal fan (6). The centrifugal fan (6) has a first fan (6a) disposed in the first air passage (5a) and a second fan (6). A second fan (6b) disposed in the air passage (5b), and the first fan (6a) and the second fan (6b) are arranged in one electric motor ( 7) Integrated by The partition wall (4) is provided with a first protrusion projecting in the direction of the rotational axis near the outside of the first fan (6a) and the second fan (6b) in the radial direction. Portions (10a, 10b) are formed, and the first fan (6a) and the second fan (6b) are arranged with a predetermined space (9) therebetween in the rotation axis direction, The partition wall (4) is provided so as to be inserted into the predetermined space (9).
[0010]
According to the first to third and fifth to seventh aspects of the present invention, for example, when outside air (outside air) flowing through the first air passage (5a) leaks into the second air passage (5b), this predetermined The space (9) becomes an air passage. Increasing the friction loss in the air passage reduces the amount of leakage. Conventionally, a labyrinth structure is formed by inserting a flat partition wall into the predetermined space (9), and the path of the air passage is extended. In the present invention, the first projecting portion is provided in the predetermined space (9). By inserting the partition wall (4) provided with (10a, 10b), the path of this air passage is extended, and by adding a bent portion, the friction loss is increased compared to the conventional case, and the first air passage ( The amount of leakage from the 5a) side to the second air passage (5b) side is reduced. Therefore, the mixing of vehicle exterior air (outside air) and vehicle interior air (inside air) is reduced. As a result, the comfort of foot heating for the passenger can be improved.
[0011]
In the invention of claim 4 , the surface of the scroll casing (3a) facing the partition wall (4) on the second air passage (5b) side is near the outside in the radial direction of the second fan (6b), and rotates. A second protruding portion (10c) protruding in the axial direction is formed.
[0012]
According to the invention of claim 4 , in the space between the casing (3a) surface facing the partition wall (4) and the suction surface side of the second fan (6b), the second projecting portion ( By providing 10c), the path of this air passage is extended, and a bending portion is added, so that friction loss increases compared to the conventional case, and the amount of leakage from the second air passage (5a) side to the vehicle interior side Is reduced. In particular, during high-speed travel (ram pressure increases) when the pressure difference between the vehicle exterior air (outside air) and the vehicle interior becomes large, the amount of vehicle exterior air (outside air) entering the vehicle interior is greatly reduced. As a result, the passenger comfort can be improved.
[0013]
In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. First, FIG. 1 shows a mounting diagram of the inside / outside air blowing unit 1 of the vehicle air conditioner in the present embodiment. Due to the configuration of the vehicle air conditioner, the inside / outside air blowing unit 1 that is the most upstream side of the air is offset in the vehicle width direction from the center of the instrument panel P in the vehicle interior (offset to the left in the vehicle width direction in a right-hand drive vehicle). It is arranged in the front part of the passenger seat. The inside / outside air blower unit 1 is used to switch and introduce interior air outside the vehicle interior (hereinafter referred to as outside air), interior air inside the vehicle interior (hereinafter referred to as inside air), or both inside air and outside air. The inside / outside air blowing unit 1 is disposed on the vehicle rear side of a partition wall 2 made of iron plate that partitions the engine room (E / G) and the vehicle interior.
[0015]
That is, the inside / outside air blowing unit 1 is disposed between the partition wall 2 and the instrument panel P. Further, a container-like storage member (hereinafter referred to as a glow box 20) that is disposed opposite to the inside / outside air blowing unit 1 on the passenger seat side of the instrument panel P and on the vehicle rear side of the inside / outside air blowing unit 1 to store articles. Called). The glow box 20 is rotated in the direction of arrow C in FIG. 1 by a rotation shaft 20a that is rotatably supported by the instrument panel P. Thereby, the glow box 20 can be opened and closed.
[0016]
The inside / outside air blowing unit 1 has an air conditioning case 3 that forms an air flow path into the vehicle interior. The air conditioning case 3 is partitioned into two passages by a partition wall 4 extending in the horizontal direction. Specifically, the air-conditioning case 3 has a scroll casing 3a that is a scroll-like flow path, and the inside of the scroll casing 3a is partitioned by the partition wall 4 in the vertical (upper and lower) direction. First and second air passages 5a and 5b are formed so as to be aligned. Note that the scroll casing 3a is formed of a resin material such as polypropylene, and is actually configured by assembling a plurality of case members so as to be stacked in the vertical direction (top and bottom) and divided in the vehicle left-right direction. Yes.
[0017]
On the downstream side of the first and second air passages 5a and 5b, a temperature control unit (not shown) for adjusting the temperature of the conditioned air is disposed. In addition, this temperature control unit is actually arranged in the vehicle width direction along with the inside / outside air blower unit 1 and is arranged at a central portion in the vehicle width direction. Although not described in detail, the temperature control unit incorporates air conditioning functional parts such as a well-known evaporator, a heater core, and an air mix door for temperature control. The inside of the temperature control unit has the first and second air passages 5 a and 5 b, and the first air passage can blow conditioned air toward the inner surface of the vehicle window glass 21. In addition, the second air passage 5b can blow air-conditioned air to the feet of the occupant (F in the figure is the occupant's foot on the passenger seat side).
[0018]
Next, as shown in FIG. 2, in the scroll casing 3a, a first fan 6a is disposed in the first air passage 5a, and a second fan 6b is disposed in the second air passage 5b. Details of the first and second fans 6a and 6b will be described later. In the upper part of the inside / outside air blowing unit 1, a first inside air introduction port 22 for introducing inside air into the second air passage 5b and outside air for introducing outside air into the first air passage 5a and the second air passage 5b. An introduction port 23 is formed.
[0019]
As shown in FIG. 1, the outside air inlet 23 communicates with an outside air inlet 24 that opens at an upper portion of the partition wall 2 through a duct 25. The first inside air introduction port 22 opens at an upper part in the instrument panel P. The outside air introduction port 23 and the first inside air introduction port 22 are formed above the first fan 6a and can be selectively switched by the first inside / outside air switching door 26, which is an opening / closing member. ing.
[0020]
Next, in the inside / outside air blowing unit 1, a filter 27 for removing dust is provided between the first inside air inlet 22 and the first fan 6a. The filter 27 can be easily detached, and the filter 27 is removed as follows. First, the glow box 20 is removed from the instrument panel P. Then, the cover part 28 for taking out the filter 27 is exposed in the vehicle interior. Further, when the lid portion 28 is taken out, the end portion of the filter 27 is exposed in the vehicle interior, and the filter 27 is pulled out rearward of the vehicle using the exposed portion as a handle. Thereby, the filter 27 can be removed from the inside / outside air blowing unit 1. When the filter 27 is attached, the above procedure is reversed.
[0021]
Next, a second inside air inlet 29 for introducing the inside air into the second air passage 5b is formed at a lower portion of the second fan 6b. The second inside air introduction port 29 is opened and closed by a second inside / outside air switching door 30 which is an opening / closing member. Further, in the inside / outside air blowing unit 1, a communication path 31 is provided that communicates the outside air introduction port 23 and the suction port 61 b of the second fan 6 b so as to extend in the vertical direction on the vehicle rear side. The communication path 31 is opened and closed by the second inside / outside air switching door 30. That is, the second inside / outside air switching door 30 selectively opens and closes the second inside air introduction port 29 and the communication path 31.
[0022]
The communication passage 31 is provided to achieve a full outside air mode in which outside air is introduced into both the first air passage 5a and the second air passage 5b. In the all outside air mode, the first inside / outside air switching door 26 closes the first inside air introduction port 22, opens the outside air introduction port 23, and the second inside / outside air switching door 30 closes the second inside air introduction port 29. The communication path 31 is opened. Thereby, outside air is introduced from the outside air introduction port 23, and outside air is introduced into the second air passage 5 b through the communication passage 31.
[0023]
In addition to the all outside air mode, the all inside air mode and the two-layer flow mode can be selected. In the all inside air mode, the first inside / outside air switching door 26 opens the first inside air introduction port 22, closes the outside air introduction port 23, and the second inside / outside air switching door 30 opens the second inside air introduction port 29. The communication path 31 is closed. Thereby, the inside air is introduced into the first air passage 5a from the first inside air introduction port 22, and the inside air is introduced into the second air passage 5b from the second inside air introduction port 29.
[0024]
Next, in the two-layer flow mode, the first inside / outside air switching door 26 closes the first inside air introduction port 22, opens the outside air introduction port 23, and the second inside / outside air switching door 30 opens the second inside air introduction port 29. And the communication path 31 is closed. Thereby, outside air is introduced into the first air passage 5a from the outside air introduction port 23, and inside air is introduced into the second air passage 5b from the second inside air introduction port 29.
[0025]
As a result, relatively low-humidity outside air is introduced into the first air passage 5a, and the anti-fogging effect of the vehicle window glass 21 can be enhanced by heating the first air passage 5a with the temperature control unit to generate hot air. In the second air passage 5b, a relatively high-temperature inside air is introduced, heated by the temperature control unit and blown out as a warm air from the foot outlet toward the occupant's feet. The heating effect can be enhanced without generating a ventilation load due to the introduction of outside air. In particular, the heating effect can be enhanced under conditions where the temperature of the engine coolant flowing into the heater core is not sufficiently increased (for example, when idling a diesel engine vehicle).
[0026]
Next, details of the scroll casing 3a and the two-layer flow fan 6 which are the main parts of the present invention will be described with reference to FIG. The two-layer flow fan 6 is generally called a centrifugal multiblade fan (centrifugal fan), and is housed in the scroll casing 3a. A partition wall 4 is integrally formed on the inner wall of the scroll casing 3a, and the radial inner direction (horizontal direction) of first and second fans 6a and 6b, which will be described later, so as not to hinder the rotation of the two-layer flow fan 6 ) So as to extend linearly. Specifically, as shown in FIG. 2, a predetermined space 9 (described later) formed by separating the first fan 6a and the second fan 6b in the rotation axis direction is required. However, the first air passage 5a and the second air passage 5b communicate with each other through the space 9, and the separation between the outside air and the inside air is deteriorated in the above-described two-layer flow mode, so that the defogging effect of the window glass is reduced and the heating effect is reduced. There is a problem that decreases.
[0027]
Therefore, in the present embodiment, the following is dealt with. A circular air inlet 3c for taking in air into the first air passage 5a is formed in the scroll casing 3a on one end side in the rotation axis direction described later. A bell mouth-shaped second bell mouth portion 3e for smoothly flowing the sucked air to the suction port 61a of the first fan 6a is integrally formed at the opening edge of the air intake port 3c.
[0028]
A circular air inlet 3d for taking in air into the second air passage 5b is formed at the other end side in the rotation axis direction of the first and second fans 6a and 6b. A cylindrical attachment portion 3b is formed at the opening edge of the air intake port 3d so as to protrude downward in the figure. The attachment portion 3d has a suction function similar to that of the first bell mouth portion 3e. A bell mouth-like second bell mouth portion 3f that allows the air to flow smoothly to the suction port 61b of the second fan 6b is fitted.
[0029]
Next, the first and second fans 6a and 6b are formed of a resin material such as polypropylene. In the present embodiment, the outer diameter (fan diameter) is different, and as shown in FIG. The two fans 6b and the first fan 6a having a smaller outer diameter than the second fan 6b are integrally formed. The first and second fans 6a and 6b have a partition 60 that partitions the first fan 6a and the second fan 6b in the rotational axis direction so as to extend in the radial direction.
[0030]
The first and second fans 6a and 6b are integrally driven by one electric motor 7 disposed on one side in the rotational axis direction. The first and second fans 6a and 6b have suction ports 61a and 61b on both ends in the rotational axis direction, respectively. That is, the first and second fans 6a and 6b of this example are of the double suction type that sucks air from both ends in the rotation axis direction, and are arranged so as to face substantially in the horizontal direction.
[0031]
Further, as shown in FIG. 1, the electric motor 7 is inserted from the suction port 61b of the second fan 6b from the bottom to the top, and is formed in the first and second fans 6a and 6b described later. The drive shaft is fitted and coupled to 60c. Accordingly, the electric fan 7 reduces the opening area of the suction port 61b, so that the suction resistance of the second fan 6b increases. Therefore, in order to maintain the air blowing capacity with an increase in the suction resistance, the second fan 6b is maintained. The outer diameter of 6b is made larger than that of the first fan 6a. In addition, the electric motor 7 has a structure that is screwed to the outer wall surface on the lower side of the scroll casing 3 a by the mounting bracket 8.
[0032]
Next, the partition part 60 cooperates with the partition wall 4 mentioned above, and partitions the inside of the scroll casing 3a into the 1st air path 5a and the 2nd air path 5b in the rotation axis direction. The partition portion 60, as shown in FIG. 2, is formed in a divergent substantially conical, the rotation center portion is formed with a boss portion 6 0 c which drive shaft is fitted into the electric motor 7. Further, on the outer side in the radial direction, there are a first connecting portion 60a that is connected to the ends of the plurality of first fan blades 6c of the first fan 6a, and ends of the plurality of second fan blades 6d of the second fan 6b. The second connecting portion 60b to be connected is branched and formed. In addition, the 1st connection part 60a couple | bonds the edge part of the some 1st fan blade 6c with the annular | circular shaped connection part 62a which has the suction inlet 61a. Similarly, the second connecting portion 60b is configured to connect the ends of the plurality of second fan blades 6d with an annular connecting portion 62b having a suction port 61b.
[0033]
In addition, a hollow space 9 is formed in the rotation axis direction between the first connecting portion 60a and the second connecting portion 60b. That is, as shown in FIG. 2, the partition portion 60 includes the two first connecting portions 60 a that face each other so that the first fan 6 a and the second fan 6 b are disposed with a space 9 therebetween in the rotation axis direction. And the second connecting portion 60b. And the partition wall 4 is provided so that the front-end | tip part 4a of the partition wall 4 may be inserted in the said space 9. As shown in FIG. By doing so, the space 9 has a labyrinth structure (the air passage becomes longer), so that the inside air or the outside air passes through the space 9 and the friction loss becomes large and it is difficult to pass. Therefore, setting the length of the air passage passing through the space 9 as long as possible can reduce the mixing of the inside air and the outside air.
[0034]
However, as shown in FIG. 3, the scroll shape of the scroll casing 3a is generally a logarithm based on the outer diameter of each fan (for example, the outer diameters of the first and second fan blades 6c and 6d). It is formed so as to expand sequentially from the nose portion 3g at the beginning of winding in a spiral shape. Therefore, in order to set the protruding length L of the first and second connecting portions 60a and 60b, there is a limit not to contact the nose portion 3g. Therefore, in the present embodiment, an annular (ring-shaped) first ring is formed on both surfaces of the partition wall 4 near the outside in the radial direction of the first and second connecting portions 60a and 60b of the first fan 6a and the second fan 6b. One projecting portion 10a, 10b is formed to further extend the air passage. Furthermore, since a path by bending is added to the air passage to the space 9 and the friction loss of the bent portion is increased, the amount of leakage from the first air passage 5a to the second air passage 5b is reduced. The projecting heights of the first projecting portions 10a and 10b are set so as not to project to the inside of the end faces of the fan blades 6c and 6d of the first and second connecting portions 60a and 60b.
[0035]
Further, also in the space 9a between the connecting portion 62b of the second fan 6b and the inner surface of the scroll casing 3a, an annular shape (ring shape) is formed on the inner surface of the scroll casing 3a in the vicinity of the outer side in the radial direction of the connecting portion 62b of the second fan 6b. ) Is formed to further extend the air passage of the space 9a, and the friction loss due to bending at the air passage entrance to the space 9a is increased. 5 Leakage from the b side to the vehicle interior side is reduced. The protruding height of the second projecting portion 10c is set to such an extent that it does not protrude inside the end face of the fan blade 6d of the connecting portion 61b.
[0036]
The scroll casing 3a is divided radially outward of the first and second fans 6a and 6b, and has a dividing surface in the rotation axis direction of the first and second fans 6a and 6b. It has become. Thus, the partition wall 4 can be provided so as to be inserted into the space 9.
[0037]
In the above embodiment, by inserting the partition wall 4 provided with the first projecting portions 10a and 10b into the predetermined space 9, the path of the air passage is extended and a bent portion is added, so that it is compared with the conventional case. Thus, the friction loss increases and the amount of leakage from the first air passage 5a side to the second air passage 5b side is reduced. Therefore, mixing of outside air and inside air is reduced. As a result, the comfort of foot heating for the passenger can be improved.
[0038]
In addition, in the space 9a between the connecting portion 62b of the second fan 6b and the inner surface of the scroll casing 3a, by providing the second projecting portion 10c on the inner surface of the casing 3a, the path of this air passage is extended and bent. By adding the portion, the friction loss is increased as compared with the conventional case, and the amount of leakage from the second air passage (5 b ) side to the vehicle interior side is reduced. In particular, during high-speed travel (ram pressure increases) when the pressure difference between the vehicle exterior air (outside air) and the vehicle interior becomes large, the amount of vehicle exterior air (outside air) entering the vehicle interior is greatly reduced. As a result, the passenger comfort can be improved.
[0039]
(Other embodiments)
In the above embodiment, the protruding heights of the first and second protruding portions 10a, 10b, and 10c are set to such an extent that they do not protrude inside the end faces of the fan blades 6c and 6d of the first and second connecting portions 60a and 60b. As shown in FIG. 4, as shown in FIG. 4, the tip is formed in a curved shape and the protruding height is extended in the direction of the rotation axis so that the curved shape faces the first and second fans 6a and 6b. The annular third projecting portions 11a, 11b, and 11c may be formed. Thereby, the air blown out from the first and second fan blades 6c, 6d collides with the third projecting portions 11a, 11b, 11c. As a result, the vicinity of the third projecting portions 11a, 11b, and 11c becomes a turbulent flow, the friction loss increases, and the leakage amount is further reduced.
[0040]
Further, as shown in FIG. 5, an annular fourth protruding portion is formed such that the tip is formed in an inclined shape and the protruding height is extended in the direction of the rotation axis so that the inclined portion faces the inner wall side of the scroll casing 3 a. 12a, 12b, and 12c may be formed.
[0041]
Further, as shown in FIG. 6, a plurality of annular fifth projecting portions 13a, 13b, 13c are partitioned by shortening the projecting length L of the first and second connecting portions 60a, 60b and the connecting portion 62b. It may be formed inside the lower surface of the wall 4 and the scroll casing 3a.
[0042]
The first and second projecting portions 10a, 10b and 10c, the third projecting portions 11a, 11b and 11c, the fourth projecting portions 12a, 12b and 12c and the fifth projecting portion 13a, according to the above embodiment, 13b and 13c are both formed in an annular shape (entire circumference) on the inner surface of the partition wall 4 or the scroll casing 3a. However, the protrusions 13b and 13c are partially formed so as to be uneven over the entire circumference. May be. As a result, disturbances occur in the vicinity thereof, the friction loss increases, and the leakage amount is further reduced.
[0043]
In the above embodiment, the first fan 6a and the second fan 6b are integrally formed. However, the first fan 6a and the second fan 6b may be integrally rotated by the electric motor 7 by combining separately formed ones. .
[0044]
In addition, the first fan 6a and the second fan 6b have different diameters, but may have the same diameter. Furthermore, it goes without saying that the first fan 6a may have a larger fan diameter than the second fan 6b.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing vehicle mounting of a blower unit of a vehicle air conditioner in an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of an essential part showing a blower unit of a vehicle air conditioner in an embodiment of the present invention.
3 is a cross-sectional view seen from the top surface of the air blowing unit shown in FIG. 2;
FIG. 4 is a longitudinal sectional view showing details of a blower unit of a vehicle air conditioner according to another embodiment.
FIG. 5 is a longitudinal sectional view showing details of a blower unit of a vehicle air conditioner according to another embodiment.
FIG. 6 is a longitudinal sectional view showing details of a blower unit of a vehicle air conditioner according to another embodiment.
[Explanation of symbols]
3a ... Scroll casing 4 ... Partition wall 5a ... First air passage 5b ... Second air passage 6 ... Two-layer flow fan (centrifugal fan)
6a ... 1st fan 6b ... 2nd fan 7 ... Electric motor 9 ... Space 10a, 10b ... 1st protrusion part 10c ... 2nd protrusion part

Claims (7)

A scroll casing (3a) constituting a scroll-like air passage;
A centrifugal fan (6) which is housed in the scroll casing (3a) and sucks air from both sides in the rotational axis direction;
In the scroll casing (3a), in the direction of the axis of rotation of the centrifugal fan (6), there are two air passages: a first air passage (5a) through which vehicle exterior air flows and a second air passage (5b) through which vehicle interior air flows. A partition wall (4) for partitioning the passage,
The centrifugal fan (6) has a first fan (6a) disposed in the first air passage (5a) and a second fan (6b) disposed in the second air passage (5b), The first fan (6a) and the second fan (6b) are integrally driven by one electric motor (7) disposed on one side in the rotational axis direction,
The partition wall (4) includes a first projecting portion (10a, 10b) that protrudes in the direction of the rotation axis in the vicinity of the outside in the radial direction of the first fan (6a) and the second fan (6b). )
The first fan (6a) and the second fan (6b) are arranged to be separated from the predetermined space (9) in the rotation axis direction, and the partition wall (4) A blower unit for a vehicle air conditioner, which is provided so as to be inserted into the predetermined space (9). The path of an air passage formed by inserting the partition wall (4) into the predetermined space (9) is extended by the first projecting portions (10a, 10b). The ventilation unit of the vehicle air conditioner described in 1. The centrifugal fan (6) has a partition part (60) for partitioning the first fan (6a) and the second fan (6b) so as to extend in a radial direction,
The partition part (60) includes two opposing parts such that the first fan (6a) and the second fan (6b) are arranged with the predetermined space (9) in the direction of the rotation axis. Having connecting portions (60a, 60b),
The said partition wall (4) is provided so that it may be inserted in the said predetermined space (9) between the said 2 connection parts (60a, 60b). The ventilation unit of the vehicle air conditioner of Claim 2. The surface of the scroll casing (3a) facing the partition wall (4) on the second air passage (5b) side is in the vicinity of the outer side in the radial direction of the second fan (6b) and in the direction of the rotation axis The air blower unit for a vehicle air conditioner according to any one of claims 1 to 3, wherein a second projecting portion (10c) projecting into the air conditioner is formed. The first projecting portion (10a, 10b) and the second projecting portion (10c) are formed in an annular shape on the scroll casing (3a) and the partition wall (4). The ventilation unit of the vehicle air conditioner as described in any one of Claims 1-4. The vehicle according to any one of claims 1 to 5 , wherein the first fan (6a), the second fan (6b), and the partition portion (60) are integrally formed. Air conditioner blower unit. The first projecting portion (10a, 10b) and the second projecting portion (10c) are formed integrally with the scroll casing (3a) and the partition wall (4). The ventilation unit of the vehicle air conditioner as described in any one of Claim 5 thru | or.

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