JP3169060B2 - Ventilation unit for vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation unit for a vehicle air conditioner, which can introduce outside air into a first air passage and inside air into a second air passage.

[0002]

2. Description of the Related Art Conventionally, as a blower unit of a vehicle air conditioner capable of introducing outside air into a first air passage and inside air into a second air passage, there is one disclosed in Japanese Patent Laid-Open No. 5-124426. This conventional apparatus is intended to achieve both an improvement in heating capacity in winter and an improvement in anti-fog properties of window glass. Specifically, the inside of the air-conditioning case is divided into two passages, relatively high temperature inside air is introduced into one passage, the inside air is blown to the foot outlet through this passage, and the relatively low humidity outside air is supplied into the other passage. The outside air is blown to the defroster outlet through this passage.

In the conventional apparatus, a centrifugal multi-blade fan is provided in a scroll-shaped casing in each of the air upstream portions of the two passages, and the fan is integrated by one motor. It is designed to rotate. In order to form the two passages, the casing has a partition wall for dividing the internal air passage into two. The partition wall is formed along the outer periphery of the fan and at a predetermined interval from the outer periphery of the fan so as not to hinder the rotation of the fan.

[0004]

However, in the above-mentioned conventional apparatus, since a predetermined interval exists between the partition wall and the outer peripheral portion of the fan, the inside air and the outside air are mixed through this gap. There's a problem. Then, an object of the present invention is to provide an air conditioner for vehicles which can reduce mixing of inside air and outside air.

[0005]

In order to achieve the above object, the following technical means are employed. According to the first to third aspects of the present invention, the centrifugal fan (22) includes the first fan (22a) arranged in the first passage (30a) and the second fan (22b) arranged in the second passage (30b). 2 fans (22
b), and the first fan (22a) and the second fan (22b) are integrally driven by one motor (23) arranged on one side in the rotation axis direction. The first fan (22a) and the second fan (22b) are separated from each other by a predetermined space (35) in the direction of the rotation axis.
Are separated by a partition wall (29
a, 29b) are provided so as to be inserted into a predetermined space (35).

Thus, for example, when vehicle interior air flowing through the second passage through a predetermined space leaks into the first passage, the one interior wall portion of the vehicle interior air overlaps the partition wall. After passing through the gap between the parts, it is necessary to pass through the gap between the partition wall and the other partition wall part, and the space becomes a maze structure, so that the separation of outside air from the inside of the vehicle is improved. Can be. As a result, it is possible to reduce mixing of the vehicle interior air and the vehicle exterior air.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 is an overall configuration diagram of a vehicle air conditioner, and FIG. 2 is a diagram showing FIG.
FIG. 3 is a sectional view taken along the line AA in FIG. 2, and FIG. 4 is a sectional view taken along the line BB in FIG. FIG. 5 is a cross-sectional view taken along the line CC in FIG.

Due to the structure of the vehicle air conditioner, the inside / outside air blowing unit 1, which is the most upstream side of the air, is offset in the vehicle width direction from the center of the instrument panel in the vehicle interior (not shown) as shown in FIG. (Offset to the left in the width direction of the vehicle) and is disposed in front of the passenger seat. The inside / outside air blowing unit 1 is for switching and introducing inside the vehicle interior air (hereinafter, inside air) or outside air inside the vehicle (hereinafter, outside air), or both inside air and outside air.
As shown in FIG. 3, the air passage inside the inside / outside air blowing unit 1 includes a first passage 30 a and a second passage 30 b described later.
It is configured to be divided into two. The details of the inside / outside air blowing unit 1 will be described later in detail.

On the downstream side of the inside and outside air blowing unit 1,
As shown in FIGS. 1 and 2, an air conditioner unit 2 incorporating a heat exchanger for air conditioning is arranged. Air conditioner unit 2
As shown in FIG. 1, is disposed at a substantially central portion of an instrument panel in a vehicle cabin. In the air conditioner unit 2, the first and second passages 30a, 30b
An evaporator (cooling heat exchanger) 3 for the refrigeration cycle is provided downstream of the refrigeration cycle. The evaporator 3 is installed in a substantially horizontal state as shown in FIG. 1 so that the air blown from the inside / outside air blower unit 1 flows in from below.

A heater core (heating heat exchanger) 4 is installed in a substantially horizontal state on the downstream side of the evaporator 3 (on the upper side of the vehicle compartment), and the heater core 4 uses an engine cooling water (hot water) as a heat source. A blow mode switching unit 5 is arranged above the heater core 4 in the vehicle interior (downstream of the air). Here, in the present embodiment, an air mix system for adjusting the mixing ratio of the cool and hot air is adopted as the temperature adjusting means of the conditioned air, and as shown in FIG. 2), the ratio of the amount of warm air passing through the heater core 4 to the amount of cool air bypassing the heater core 4 is adjusted by controlling the opening degree of the air mix doors 6a and 6b, thereby controlling the temperature of the air blown into the vehicle interior. In addition, a rotary door having an arc-shaped circumferential surface is used as the air mix doors 6a and 6b.

A hot water control valve for controlling the flow rate of hot water to the heater core 4 is provided in place of the air mix doors 6a and 6b, and the flow rate of hot water to the heater core 4 is controlled by the hot water control valve. Of course, the temperature of the air blown into the vehicle cabin may be controlled by adjusting the amount of air heating. Also, in the air conditioner unit 2, as shown in FIG. 5, the inside air passage is divided into first air passage 8a and second air passage 8b in the vehicle longitudinal direction by partition plates 7A, 7B, 7C. ing.

The air outlet mode switching section 5 is for switching the air outlet mode into the vehicle interior. As shown in FIG. 1, a center face (upper) air outlet (shown in FIG. 1) for blowing air toward the head of the occupant in the vehicle interior. ), And a side face outlet air passage 10 communicating with a side face outlet (not shown), and a foot (foot) for blowing air toward a foot of an occupant in the vehicle cabin.
It has a foot outlet air passage 11 communicating with the outlet 11a and a defroster outlet air passage 12 communicating with a defroster outlet (not shown) for blowing air toward the window glass of the vehicle. The passages 9, 11, and 12 are switched and opened and closed by door means. In the present embodiment, plate-like doors 13a, 13b and 13c are used as the door means for switching the blowing mode, as shown in FIG.

In FIG. 5, a door 13a is a face door, a door 13b is a defroster door, and a door 13c is a foot door. FIG. 5 shows a door operation position in a foot mode. Although the foot outlet air passage 11 is not shown in FIG. 5, the foot door 13c is not shown in FIG.
When operated to the position indicated by the two-dot chain line, the foot outlet air passage 1
One entrance is closed. Further, as is well known, the side face blow-out air passage 10 is always in communication with the space in the blow-out mode switching unit 5, and when the blow-out grill provided in the side face blow-out port is operated, the side face blow-out air path 10 is opened. Intermittent blowing air and adjusting the blowing direction are possible.

In this embodiment, a plate-like door 13a shown in FIG.
By switching and opening / closing the plurality of outlet air passages 9, 11, 12 by selecting the operation (rotation) position of 13b, 13c, the well-known face outlet mode, bi-level outlet mode, foot outlet mode, and foot / defroster combined outlet mode. And a plurality of blowing modes such as a defroster blowing mode.

The case 14 of the air conditioner unit 2 shown in FIGS. 1, 2 and 5 is constituted by a resin case divided into four parts in the vertical direction. That is, although not shown in detail, the case 14 includes a lower case that houses the evaporator 3, an intermediate case that houses the heater core 4,
The blowout mode switching unit 5 is divided into four upper and lower upper and lower cases, and devices such as a heat exchanger and a door are incorporated therein. And the partition plate 7A,
7B and 7C are integrally formed on the inner wall surfaces of these resin cases.

The divided cases of the inside and outside air blower unit 1 and the air conditioner unit 2 are detachably connected to each other by using a well-known elastic metal clip or screw. Further, the evaporator 3 is disposed slightly inclined from the horizontal plane in order to improve the discharge property of the condensed water generated by the cooling action. That is, as shown in FIG. 1, the evaporator 3 is inclined downward toward the front side (rightward in FIG. 1) of the air blown by the inside and outside air blowing unit 1 below the evaporator 3. Are located.

As shown in FIG. 5, a partition plate 7C disposed on the leeward side of the heater core 4 is bent obliquely rightward and upward at an upper portion thereof. 7D includes a first air passage 8a and a second air passage 8a.
A communication port 15E is provided for communicating with b. The communication port 15E is opened and closed by a foot door 13c, is fully closed in a foot mode and a combined use of a foot and a differential mode, and is fully opened in a face mode and a defroster mode. In bi-level mode, communication port 1
5E is fully closed or partially opened.

Then, as shown in FIG. 5, the center face blown air passage 9 and the defroster blow air passage 1
2 is arranged on the side of the first air passage 8a, while the foot outlet air passage 11 is arranged on the side of the second air passage 8b. Although not shown in FIG. 5, the side face blow-out air passage 10 is disposed on the first air passage 8a side. Next, the operation in the above configuration will be briefly described.

In FIG. 1, the air flowing from the inside / outside air blowing unit 1 flows in a substantially horizontal direction, and flows into a lower part of the evaporator 3. Then, the blown air is dehumidified and cooled by the evaporator 3, flows further upward, is introduced into the heater core 4, and is heated here. In the case of this example, the air mix doors 6a and 6b are used as the air conditioning temperature control means.
A desired blown air temperature is created by adjusting the air volume ratio of the air passing through the heater core 4 and the air bypassing the heater core 4. The conditioned air reheated to the desired temperature by the heater core 4 is distributed to predetermined outlets by the doors 13a to 13c of the outlet mode switching unit 5 in the upper case.

Next, details of the inside / outside air blowing unit 1 which is a main part of the present invention will be described. The inside and outside air blowing unit 1 is shown in FIG.
A─a, b─b, and cc are divided surfaces (joining surfaces)
And four cases formed of a resin material such as polypropylene. Specifically, as shown in FIGS. 3 and 4, the inside / outside air blowing unit 1 includes an inside / outside air case 18 in which an outside air inlet 16 and a first inside air inlet 17 a are integrally formed, and a fan casing 20 containing a blower 19.
a and 20b, and a cover case (not shown) for checking and replacing the blower 19.

The cross section of the fan casings 20a and 20b taken along the lines AA and BB in FIG. 2 is a division surface (joining surface) of the fan casings 20a and 20b. , 20b are not hatched. As shown in FIGS. 3 and 4, the inside and outside air case 18 has an upper portion formed in an arcuate cross section, and an outside air inlet 16 and a first inside air inlet 17 a are formed along the circumferential direction of the arcuate cross section. Have been. The outside air inlet 16 is connected to a duct (not shown) communicating with an outside air inlet (not shown) opened to the vehicle side.

The outside air inlet 16 and the first
The inside air inlet 17a is opened and closed by a rotary door 21 having a circumferential surface having an arc-shaped cross section. The rotary door 21 is rotatable in a direction indicated by an arrow d in FIG. 3 by supporting a pair of arms (not shown) by the fan casings 20a and 20b.

The blower 19 is generally called a centrifugal multi-blade fan (centrifugal fan), and is housed in fan casings 20a and 20b as shown in FIGS. The fan 22 is formed of a resin material such as polypropylene, and has a different outer diameter (fan diameter) in the present embodiment, and has a large outer diameter (fan diameter) as shown in FIGS. And a second fan 22b having an outer diameter smaller than that of the first fan 22a are integrally formed.
The first fan 22a and the second fan 2 extend in the radial direction as shown in FIGS.
2b in the direction of the axis of rotation.

The first fan 22a and the second fan 22a
The fan 22b is integrally driven by one electric motor 23 arranged on one side in the direction of the rotation axis. The first and second fans 22a, 2a
2b has suction ports 24 and 25 at both ends in the direction of the rotation axis as shown in FIGS. That is, the blower 19 in this example is of a double suction type that sucks air from both sides in the direction of the rotation axis. Note that the fan 22 is arranged so that the rotation axis direction is substantially horizontal.

As a result, the first fan 22a sucks air from the suction port 24 from the rear side of the vehicle toward the front side of the vehicle, and blows out the air in the vehicle width direction.
Air is sucked from the inlet 25 toward the vehicle rear side from the vehicle front side, and is blown out in the vehicle width direction.
By the way, as shown in FIG.
The fan 20b is split radially outward of the fan 22 at the split surface bb, and has a split surface in the rotation axis direction of the fan 22. When the fan casings 20a and 20b are assembled, FIG.
As shown in FIG. 5, a scroll case portion 26 forming a scroll-shaped air passage for housing the blower 19 is formed.

As shown in FIG. 1, the fan casing 20a is formed in a substantially semicircular bowl shape and mainly constitutes an air upstream portion of the scroll case portion 26. On the other hand, the fan casing 20b mainly constitutes an air blowing section of the scroll case section 26 as shown in FIG. As shown in FIG. 1, a blower 27 is formed integrally with the fan casing 20b so that a spiral airflow blows straight toward the evaporator 3 in the vehicle width direction. The blowout portion 27 of the fan casing 20b is formed so that the airflow path increases toward the evaporator 3 in the vehicle front-rear direction as shown in FIG.

That is, the fan casings 20a, 20b
Is configured to be divided into an upstream side and a downstream side in a flow direction of the blown air (indicated by an arrow L in FIG. 1). As shown in FIG.
As shown in FIG. 4, the first and second fans 22a and 22b having different outer diameters described above are housed therein. Then, as shown in FIGS. 2 to 4, the scroll case portion 26 adjusts the first fan 2 according to the outer diameter of the first and second fans 22 a and 22 b.
A first scroll case portion 26a in which 2a is stored;
A second scroll case portion 26b in which the second fan 22b is housed.

As shown in FIGS. 3 and 4, at the center of the spiral of the scroll case portion 26, a first circular opening corresponding to the first fan 22a is formed at one end side in the rotation axis direction of the fan 22. A suction port 28a is formed. In addition, at the center of the spiral of the scroll case 26, FIGS.
As shown in (2), a second suction port 28b opened in a circular shape corresponding to the second fan 22b is formed on the other end side in the rotation axis direction of the fan 22. The diameters of the first and second suction ports 28a and 28b are adjusted so that the first suction port 28a has the second suction port 28a in accordance with the diameter of the corresponding fan.
It is larger than b.

As shown in FIG. 3 and FIG.
As shown in FIG. 4, a bell mouth-shaped suction guide 32 is integrally formed so as to protrude outward from the scroll case portion 26 and increase in diameter toward the outside. In addition,
The suction guide 32 is for making the air flow smoothly into the second suction port 28b, thereby increasing the suction efficiency and reducing the noise at the time of suction.

As shown in FIGS. 3 and 4, the first and second passages 30a and 30a are arranged in the scroll case portion 26 by partition walls 29a and 29b so as to be arranged in the vehicle longitudinal direction.
0b. As shown in FIG. 3, in the fan casing 20a, the partition wall 29a
Is integrally formed along the outer shape of the fan 22 on the back side of the drawing and along the inner peripheral surface of the scroll case portion 26.

On the other hand, as shown in FIG. 4, in the fan casing 20b, the partition wall 29b is formed along the outer shape of the fan 22 on the back side of the drawing in FIG.
6 are formed integrally along the inner peripheral surface. And
As shown in FIG. 2, the partition wall 29b extends to the air passage 27 connected to the air conditioner unit 2 so as to extend along the outer shape of the fan 22 and extend in the vehicle width direction.

When the inside / outside air blower unit 1 and the air conditioner unit 2 are connected, the first passage 30a communicates with the first blower passage 8a and the second passage 30b as shown in FIG. Communicates with the second air passage 8b. Incidentally, the partition walls 29a, 29b are formed so as to extend linearly inward in the radial direction of the fan 22, as shown in FIGS. Further, as described above, the fan casings 20a and 20b are configured to have a dividing surface in the rotation axis direction of the fan 22 as shown in FIG.

This is because, for example, when the front end of the partition wall 29a existing on the back side of the paper surface in FIG. 3 is shaped to be bent in the left-right direction in FIG. 3, two fan casings as in this embodiment are used. Forming 20a, 20b comprises:
It becomes impossible to remove the mold. That is, the partition walls 29a, 29b
Is bent, the partition walls 29a and 29b must be formed separately.

As a result, in order to construct a fan casing having the partition walls 29a and 29b, as another structure, for example, at least two cases divided in the left-right direction in FIG. Three case parts are required. Therefore, there is a problem that the number of parts increases as compared with the present embodiment, and the workability of assembling the case deteriorates.

Therefore, in the present embodiment, as described above, the partition wall 29 is formed linearly inward in the radial direction of the fan 22 and the scroll case 26 is formed with a dividing surface in the direction of the rotation axis of the fan 22. With such a structure, the scroll case portion 26 for housing the fan 22 can be configured with two cases, the number of parts can be reduced, the workability of assembling the case can be improved, and a practically useful effect can be obtained. Obtainable.

FIG. 1 shows the direction in which the main dies of the fan casings 20a and 20b in this embodiment are removed. FIG. 3 shows the direction in which the slide die of the fan casing 20a is removed. FIG. 4 shows the direction in which the slide die of the fan casing 20b is removed. Further, as shown in FIGS. 3 and 4, the suction guide 32 of the fan casing 20a slides a thin plate-shaped slide die (not shown) in which the lower end of the drawing has an arc shape and slides downward. It is formed by sliding an upper thin plate-shaped slide die (not shown) upward.

Further, as shown in FIG. 4, the suction guide 32 of the fan casing 20b slides a thin plate-shaped slide die (not shown) in which the lower end of the die in the drawing has an arc shape and slides downward. It is formed by sliding a thin plate-shaped slide die (not shown) in the middle and upper direction upward. Accordingly, the suction guide 32 is formed so as to protrude outward from the scroll case portion 26. When the scroll case portion 26 has a structure having a dividing surface in the rotation axis direction of the fan 22, the suction guide 32 is not affected by the mold splitting. 32 can be formed integrally, and the number of parts can be reduced.

Next, a method of assembling the inside / outside air blowing unit 1 will be briefly described. As a method of assembling the inside / outside air blower unit 1, first, the blower 19 is assembled as follows. That is, as shown in FIG. 3, the electric motor 23 is inserted into the suction port 24 of the first fan 22a having a larger outer diameter among the first and second fans 22a and 22b, and the rotating shaft 23a of the electric motor 23 is rotated. To the partition 3 described below.
Attach to the center of 6. Thereafter, an annular mounting stay 31 is mounted on the outer peripheral surface of the electric motor 23 as shown in FIG.

Thereafter, the fan casings 20a and 20b are assembled from the left and right directions in FIG. 1 so as to sandwich the blower 19, and are fastened by fastening means such as claw fitting and C-shaped clips. Thus, the scroll case 26 and the second inside air inlet 17b are formed. Thereafter, the mounting stay 31 is fixed to the scroll case 26 by fastening means such as screws, so that the blower 19 is fixed to the scroll case 26. The annular mounting stay 31 is formed with three stay portions 31a extending toward the center as shown in FIG. 1, so that the electric motor 23 is supported by the three stay portions 31a. It has become. Thus, the blower 19 can be easily assembled to the scroll case portion 26.

When the blower 19 is attached to the scroll case 26 in this manner, the first fan 22a is arranged in the first passage 30a, and the second fan 22b is arranged in the second passage 30b. You. Then, FIG.
As shown in FIG. 3, the inside / outside air case 18 is attached to the fan casings 20a and 20b from above and fixed by fastening means such as screws or C-shaped clips. Is attached, the inside and outside air blowing unit 1 is assembled. In addition, by removing the cover case (not shown), the blower 19 can be easily inspected from the vehicle interior.

Next, the structure of the air passage inside the inside / outside air blowing unit 1 will be briefly described. As shown in FIGS. 3 and 4, a first passage 100 that connects the first inside air inlet 17a and the first suction port 28a, a second inside air inlet 17b, and a second inside air inside the inside / outside air blowing unit 1 are provided. Second passage 101 communicating with the suction port 28b of the first passage 100, and the first passage 100 and the second passage 101
And a communication passage 103 is formed to communicate with.

The communication passage 103 connects the first suction port 28a and the second suction port 28b on the air upstream side of the first suction port 28a and the second suction port 28b. Further, the second inside air introduction port 17b and the communication passage 103
Is opened and closed by a switching door 33 which is an opening and closing member. In the present embodiment, the following inside / outside air modes can be set by the rotary door 21 and the switching door 33. The rotary door 21 and the switching door 33
Are operated by a servomotor or the like as an electric drive means.

All inside air mode As shown in FIG. 3, by operating the rotary door 21, the first inside air introduction port 17a is opened and the outside air introduction port 16 is closed, and the switching door 33 is moved to the position e in FIG. It is operated to the position shown to open the second inside air introduction port 17b and close the communication passage 103 (third predetermined position). Then
Both the first and second fans 22a and 22b draw in the inside air, and the inside air is supplied to both the first passage 30a (the first air passage 8a) and the second passage 30b (the second air passage 8b). Is adopted.

Two-layer flow mode By operating the rotary door 21, the outside air inlet 1
6, the first inside air inlet 17b is closed, and the switching door 33 is operated to a position shown by e in FIG. 3 to close the communication passage 103 and open the second inside air inlet 17b. (Second predetermined position). Then, outside air is sucked into the first fan 22a, and the first passage 30a
The outside air is blown into the first air passage 8a through the air passage. On the other hand, the inside air is sucked into the second fan 22b, and is blown into the second air passage 8b through the second passage 30b.

All outside air mode By operating the rotary door 21, the outside air inlet 1
6, the first inside air inlet 17a is closed,
The switching door 33 is operated to a position indicated by f in FIG. 3 to open the communication passage 103 and close the second inside air inlet 17b (first predetermined position). Then, the outside air from the outside air inlet 16 is sucked into the first fan 22a and is sucked into the second fan 22b through the communication passage 103. Thereby, the first and second passages 30a, 30b
, Outside air is blown into both the first and second air passages 8a and 8b.

In the present embodiment, in the season in which heating is required in winter, air is blown and heat exchanged while keeping the outside air and the inside air separated, and the defroster side heats the low-humidity outside air to heat the outside air. The above-mentioned two-layer flow mode, in which hot air heated inside air is blown out from the foot outlet 11a at the foot, can be switched. That is, the inside and outside air blowing unit 1 is partitioned into two ventilation paths, that is, the first and second passages 30a and 30b, by the partition walls 29a and 29b. 7C, the air passage is divided into a first air passage 8a and a second air passage 8b, and the first and second air passages 8a, 8a on the leeward side of the heater core 4.
8b is connected in the foot mode and in the foot mode.
In the differential mode, the first communication path 8a is closed by the foot door 13c in both modes.
After passing through the evaporator 3 and the heater core 4, the outside air that has flowed through the evaporator 3 passes through the defroster blowing air passage 12 and the side face blowing air passage 10 and is blown toward the vehicle window glass and the vicinity of the occupant's upper body. here,
By heating the low-humidity outside air with the heater core 4 to generate warm air, the effect of preventing fogging of the vehicle window glass can be enhanced.

On the other hand, inside air is blown into the second air passage 8b, and the inside air is heated by the heater core 4 to be hot air, and is blown out from the foot outlet 11a to the foot of the occupant through the foot outlet air passage 11. I have. Therefore, the ventilation load due to the introduction of the outside air does not occur during the heating of the feet in the vehicle interior, and therefore, the temperature of the engine cooling water flowing into the heater core 4 is not sufficiently increased (for example, when the diesel engine vehicle is idling). Etc.) can also enhance the heating effect. As a result, it is possible to realize both the improvement of the fogging prevention effect of the vehicle window glass and the improvement of the heating effect.

As shown in FIGS. 3 and 4, the inside / outside air blowing unit 1 has a certain space (a predetermined space) between the partition walls 29a and 29b and the fan 22 so as not to hinder the rotation of the fan 22. (Space) 35 is required. However, the first passage 30a and the second passage 30b communicate with each other through the space 35, and the separation between the inside air and the outside air passing through the first and second air passages 8a and 8b in the two-layer flow mode described above. Is deteriorated, and there is a problem that the fogging prevention effect of the window glass and the heating effect are reduced.

Therefore, the present embodiment addresses this problem as follows. As shown in FIGS. 3 and 4, the above-mentioned partitioning part 36
a between the first fan 22a and the second fan 22b.
The inside air sucked by the second fan 22b is prevented from intersecting with the outside air sucked by the second fan 22b in the rotation axis direction (the vehicle front-rear direction in FIG. 3).

The partition 36 is formed in a substantially conical shape so as to extend in the radial direction of the fan 22. The rotating shaft 23a of the electric motor 23 is fitted and fixed in the center of the partition 36. In the present embodiment, the partitioning portions 36 are formed with partitioning wall portions 36a and 36b so as to branch in the direction of the rotation axis as shown in FIGS.

In other words, in this example, the partition 36 is arranged such that the first fan 22a and the second fan 22b are arranged with the space 35 in the direction of the rotation axis as shown in FIGS. The two partition walls 36a, 3a facing each other
6b. Then, when the blower 19 is mounted in the fan casings 22a and 22b as described above, the partition walls 29a and 29b move as shown in FIGS.
It is provided so as to be inserted into the space 35 between the two partition walls 36a and 36b.

In this embodiment, when the blower 19 is attached to the scroll case 26 as described above, the partition walls 36a and 36b and the partition 36 are rotated by the rotation axis of the blower 19 as shown in FIGS. It is arranged so that it may overlap in the direction. By doing so, in the present example, the inside air flowing through the second passage 30b through the space 35, for example,
Leaks into the passage 30b of FIG.
After passing through the gap between the overlapping portions of the partition wall portion 36a and the partition walls 29a and 29b, as shown in FIG.
After that, as shown by the arrow Y, it is necessary to pass through the gap between the part where the partition habit portion 36b and the partition walls 29a and 29b overlap.

That is, since the space 35 has a maze structure by the partition walls 29a and 29b and the partition wall portions 36a and 36b, it is difficult for the inside air to pass through the space 35.
Separability between inside air and outside air can be improved. As a result, mixing of the inside air and the outside air can be reduced. Further, in this example, the outer diameter of the first fan 22a is larger than the outer diameter of the second fan 22b, and the first fan 22a has a larger blowing capacity than the second fan 22b. This allows
The following effects are obtained.

In this embodiment, even if the inside air and the outside air are mixed, the outside air in the first passage 30a leaks to the second passage 30b as much as possible, so that the window glass is more improved than the heating capacity is improved. Priority is given to anti-fogging properties. In this embodiment, since the first fan 22a has a higher static pressure than the second fan 22b, the second passage 30b
Can be prevented from leaking into the first passage 30a.

Further, in this embodiment, since the electric motor 23 is inserted into the suction port 24 of the first fan 22a, the suction resistance of the first fan 22a is increased, and the side face blowout port and the center face blowout are increased. The air volume from the outlet and the defroster outlet decreases. Therefore, in this embodiment, the first fan 22a that blows air to the first air passage 8a and the second air passage 8b that blow air to the first air passage 8a in order to make the air flow to the first air passage 8a by the first fan 22a sufficient. The outer diameter of the first fan 22a is increased so that the first fan 22a has a larger blowing ability with the second fan 8a that blows air to the first fan 22a.

(Modification) In the above-described embodiment, the first fan 22a and the second fan 22b are integrally formed.
It is also possible to rotate the unit integrally.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a vehicle air conditioner according to a first embodiment of the present invention.

FIG. 2 is a top view as viewed from above (top direction) and below (ground direction) in FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is a sectional view taken along the line CC of FIG. 1;

[Explanation of symbols]

20a, 20b ... fan casing, 22 ... fan, 2
2a ... first fan, 22b ... second fan, 29a ...
Partition wall, 29b Partition wall, 30a First passage, 30b
... second passage, 35 ... space.

Continued on front page (72) Inventor Goro Uchida 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Yuki Kato 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (58) Field surveyed (Int. Cl. ⁷ , DB name) B60H 1/00 102

Claims (3)

(57) [Claims] 1. A fan casing (20a, 20b) forming a scroll-shaped air passage; and a centrifugal fan (22) housed in the fan casing (20a, 20b) and sucking air from both sides in the direction of the rotation axis. ), A first passage (30a) through which air outside the vehicle compartment flows and a second passage through which air inside the vehicle flows inside the fan casings (20a, 20b) in the rotation axis direction of the centrifugal fan (22). (30b) and a partition wall (29a, 29b) for dividing the passage into two passages, and the centrifugal fan (22) is provided in the first passage (30).
a) a first fan (22a) arranged in
Second fan (22b) disposed in the passage (30b)
And the first fan (22a) and the second fan (22b) are integrally driven by one motor (23) arranged on one side in the rotation axis direction. The first fan (22a) and the second fan (22b)
Means to be arranged at a predetermined space (35) in the direction of the rotation axis, and the partition walls (29a, 2
9b) is a blower unit of a vehicle air conditioner, which is provided so as to be inserted into the predetermined space (35). 2. The centrifugal fan (22) has a partition (36) that extends in the radial direction to partition the first fan (22a) and the second fan (22b), The partition (36) is provided with the first fan (22a).
And a second fan (22b) having two partition walls (36a, 36b) opposed to each other so as to be arranged in the direction of the rotation axis with the predetermined space (35) therebetween. The walls (29a, 29b) are connected to the two partition walls (3
The blower unit for a vehicle air conditioner according to claim 1, wherein the blower unit is provided so as to be inserted into the space (35) between 6a and 36b). 3. The vehicle according to claim 1, wherein the first fan (22a), the second fan (22b), and the partition (36) are integrally formed. Blower unit for air conditioner.