JPH1076834A - Blower unit - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent water from entering the inside of a motor main body of an electric motor, in which an electric motor is arranged in a substantially horizontal direction so as to penetrate an outside air suction port. An axial direction of an electric motor (23) is substantially horizontal, and a motor main body (23b) is disposed so as to penetrate a first suction part (28a) for sucking outside air, and is provided on a centrifugal fan (22a) for outside air. In a blowing unit in which the centrifugal fan 22a is coaxially coupled to the rotating shaft 23a of the electric motor 23 by the partition wall 36, a flange portion 231 having a substantially L-shaped cross section is provided on the outer peripheral portion of the motor main body portion 23b.
A labyrinth structure was formed on the outer peripheral portion of the motor main body 23b by the fan-side protruding portion 36c provided on the fan partition wall 36 and protruding annularly. Thereby, the intrusion of water in the outside air, which falls from above the motor body 23b, can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower unit constituting an air conditioning unit for a vehicle, and in particular, an electric motor for rotating and driving a first centrifugal fan for sucking outside air from an outside air inlet is disposed at the outside air inlet. About what was done.

[0002]

2. Description of the Related Art The present applicant has previously filed Japanese Patent Application No. 8-16618.
No. 1 proposes a blower unit 1 as shown in FIG. The scroll casing 26 of the blower unit 1 is provided with a suction port 28a into which at least the outside air from the outside air inlet 16 is sucked. In the scroll casing 26, a centrifugal fan 22a that sucks the outside air from one side is disposed, and an electric motor 23 that rotationally drives the centrifugal fan 22a is provided with a suction port 28.
a.

[0003]

The blower unit 1 is arranged so that the axial direction of the electric motor 23 coincides with the horizontal direction. Therefore, when the electric motor 23 is operated, the outside air is supplied to the centrifugal fan. Water, such as rain or snow, which flows outward in the radial direction but is mixed into the outside air sucked from above the electric motor 23, falls to the electric motor 23 side due to gravity as shown by an arrow A in the figure. .

The electric motor 23 includes a motor body 23b having an iron component therein, and a rotating shaft 23a connected to the motor body 23b, and the rotating shaft 23a of the motor body 23b. On the side surface 23c, a communication portion, such as a through hole through which the rotating shaft 23a penetrates, for communicating the inside and the outside of the motor main body 23b with each other, is usually formed.

[0005] Therefore, the water further moves to the surface 23c of the motor main body 23b on the side of the rotating shaft 23a, so that the water enters the inside of the motor main body 23b from the communication section, and the components inside the motor are emitted. There was a possibility that durability would be remarkably reduced due to rust. Further, the water is supplied to the motor main body 23.
b, even if the water adheres to the scroll casing 26a or the wall surface of the centrifugal fan 22a even after the operation of the electric motor 23 is stopped, the water adhered falls down along the wall surface. Similarly, the motor body 23b
There was a risk of invading the inside of.

In view of the above, the present invention has an electric motor arranged in a substantially horizontal direction so as to penetrate a suction port for sucking outside air, and suppresses the intrusion of water into the motor body of the electric motor. The purpose is to do so.

[0007]

In order to achieve the above object, according to the present invention, the electric motor (2)
The axial direction of 3) is substantially horizontal, and the motor body (23)
b) is the outside air suction portion (28a) of the casing (26a).
The rotation shaft (23a) extends from the motor body (23b) side toward the inside of the casing (26a), and is connected to the outside air centrifugal fan (22a) by a coupling member (36). In a blower unit in which the fan (22a) is coaxially connected to the rotation shaft (23a),
A protruding end of the fan-side protruding portion (36c) provided on the coupling member (36) and protruding in an annular shape is substantially perpendicular to an outer peripheral portion of at least a portion of the motor main body (23b) disposed on the upper side. It is characterized by overlapping.

According to such a configuration, the surface (23c) of the motor body (23b) on the side of the rotating shaft (23a).
Is covered by the fan-side protrusion (36c). When the electric motor (23) is operated, the water in the outside air sucked from the upper side of the electric motor (23) in the outside air suction portion (28a) is gravity, so that the electric motor (2
3), the motor body (23)
The upper side of the surface (23c) of (b) is a fan-side projection (3).
6c) and the motor body (2
Since the outer peripheral portion of 3b) and the fan-side protruding portion (36c) overlap with each other, the intrusion of the water into the inner peripheral portion of the fan-side protruding portion (36c) is suppressed, and the water is removed from the motor body ( 23b) can be suppressed from entering the surface (23c) on the rotation axis (23a) side.

When the electric motor (23) is stopped,
Water attached to a portion of the casing (26a) or the outside air centrifugal fan (22a) on the upper side of the electric motor (23) falls to the upper portion of the electric motor (23) due to gravity. Similarly, intrusion of water into the surface (23c) on the rotating shaft (23a) side can be suppressed. As a result, the intrusion of water into the motor body (23b) is suppressed, and the problem that the components inside the motor body (23b) rust and the durability is significantly reduced can be suppressed.

According to the second aspect of the present invention, the motor body (23b) has a substantially L-shaped cross section at least on the outer periphery of a portion arranged on the upper side, and is opened toward the coupling member (36). A labyrinth structure is formed on the outer peripheral portion of the motor main body portion (23b) by providing a flange portion (231) to be provided and arranging the flange portion (231) and the fan-side protruding portion (36c) so as to overlap with each other. It is characterized by.

According to this, the intrusion of water into the motor body (23b) can be further suppressed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) The inside / outside blower unit 1 of the air conditioner shown in FIGS. 1 to 5 is offset in the vehicle width direction from the center of the instrument panel in the vehicle interior (not shown) (for a right-hand drive vehicle, the left side in the vehicle width direction) Offset), and it is arranged at a position in front of the passenger seat.

The inside / outside air blowing unit 1 is for switching and introducing the air inside the vehicle and the air outside the vehicle inside the air conditioner, and the internal air passage is divided into two. The details of the inside and outside air blowing unit 1 are as follows.
This will be described in detail later. An air conditioner unit 2 having a built-in air conditioner heat exchanger is disposed substantially at the center of an instrument panel in a vehicle compartment. In this air conditioner unit 2, an evaporator (cooling heat exchanger) 3 of a refrigeration cycle is provided. As shown in FIG. 1, it is installed in a substantially horizontal state, and blast air from the inside and outside air blowing unit 1 flows in from below.

A heater core (heat exchanger for heating) 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 this example, as a temperature control method for air conditioning, an air mix method for adjusting a mixing ratio of cold and hot air is adopted. As shown in FIG. 5, a lower portion of the heater core 4 in the vehicle interior (air upstream side). The ratio of the amount of hot air passing through the heater core 4 to the amount of cold air bypassing the heater core 4 is adjusted by the degree of opening of the air mix doors 6a and 6b disposed on the side, thereby controlling the temperature of 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.

In the air conditioner unit 2 as well, the internal air passage is divided into a first air passage 8a and a second air passage 8b in the longitudinal direction of the vehicle by partition plates 7A, 7B and 7C. Air flows independently through 8a and 8b. The blow-out mode switching section 5 is for switching the blow-out mode into the vehicle interior, and as shown in FIGS. 1 and 5, a center face (upper) blow-out port (upper) that blows air toward the occupant head in the vehicle interior. (Not shown) and a side face air passage 10 communicating with a side face outlet (not shown) communicating with a center face air passage 9 and a foot (foot) blowing air toward a foot of an occupant in the vehicle cabin. A foot blow air passage 11 communicating with the outlet 11a, and a defroster blow air passage 1 communicating with a defroster blow outlet (not shown) for blowing air toward the window glass.
2 and the plurality of outlet air passages 9, 11, 1
2 is selectively opened and closed by plate-like doors (door means) 13a, 13b, 13c.

The door 13a is a face door, the door 13b is a defroster door, and the door 13c is a foot door. FIG. 5 shows a door operation position in a foot mode. When the foot door 13c is operated to the position indicated by the two-dot chain line in FIG. 5, the entrance of the foot outlet air passage 11 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, by selecting the operation (rotation) position of the doors 13a, 13b, 13c, the plurality of blow-off air passages 9, 11, 12 are switched and opened and closed, and the well-known face blow-off mode and bi-level blow-off mode are performed. A plurality of blowing modes such as a foot blowing mode, a foot / defroster combined blowing mode, and a defroster blowing mode can be selected.

The partition plate 7C disposed on the leeward side of the heater core 4 has a shape bent obliquely rightward and upward at an upper portion thereof. The diagonally bent surface 7D of the partition plate 7C has
A communication port 15E for communicating the first air passage 8a and the second air passage 8b is provided. 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 the bi-level mode, the communication port 15E is fully closed or partially opened.

The center face air passage 9 and the defroster air passage 12 are connected to the first air passage 8.
The foot outlet air passage 11 is disposed on the second air passage 8b side. Although not shown in FIG. 5, the side face blow-out air passage 10 is disposed on the first air passage 8a side. 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 according to this embodiment
1 is composed of four cases formed of a resin material such as polypropylene with a─a, b─b, and cc as dividing surfaces (joining surfaces) in FIG. Specifically, as shown in FIG. 2, the inside / outside air blowing unit 1
6 and a first inside air inlet 17a, an inside / outside air case 18 corresponding to the upper surface of the blower unit case, a second inside air inlet 17b, and a built-in blower 19;
It consists of fan casings 20a and 20b corresponding to the side surface and the lower surface of the blower unit case. The second inside air inlet 17b is formed on a side surface portion (in this embodiment, a surface facing the front of the vehicle, a surface facing the back side of the paper in FIG. 1) of the blower unit case.

Further, of the fan casings 20a and 20b, the side surface portion of the blower unit case (in this embodiment,
A cover case (not shown) for inspection and replacement of the blower 19 is fastened to a portion corresponding to a surface facing the rear of the vehicle, a surface facing the front side of the paper in FIG. It is provided so as to be detachable from the surface by means. The fan casing 20a,
20b is a division surface (joining surface) of the fan casings 20a, 20a when the section is cut along AA and BB in FIG.

As shown in FIGS. 3 and 4, the inside / outside air case 18 has an upper portion formed in an arcuate cross section, and extends along the circumferential direction of the arcuate cross section along the outside air inlet 16 and the first inside air inlet. 17a are formed in parallel. The outside air inlet 16 and the first inside air inlet 17a are opened and closed by a normal rotary door 21 having a circular arc-shaped circumferential surface. The rotary door 21 has a pair of arms (not shown) formed of fan casings 20a and 2a.
By being supported by Ob, it is rotatable in the direction of arrow d in FIG.

The fan casings 20a and 20b
Are assembled, the casings 20a, 20b
Is formed with a scroll-shaped scroll case portion 26 for accommodating the blower 19. The blower 19 in the present embodiment is of a type generally called a centrifugal multi-blade fan (sirocco fan). And an electric motor 23 and coaxially arranged on the electric motor 23,
Centrifugal fan 2 rotationally driven by this electric motor 23
Consists of two. The electric motor 23 is arranged so that its axial direction is substantially horizontal.

The centrifugal fan 22 is formed of a resin material such as polypropylene, and has a first centrifugal fan (outside air centrifugal fan) 22a having a large outer diameter and a second centrifugal fan having an outer diameter smaller than the first centrifugal fan 22a. Two centrifugal fans (second centrifugal fan, inside air centrifugal fan) 22b are integrally formed coaxially. These first and second centrifugal fans 22a, 22a,
2b has fan blades 22c and 22d on its outer peripheral portion.

The scroll case 26 is
The blower 19 includes a first scroll case portion (casing) 26a containing the first centrifugal fan 22a, and a second scroll case portion (casing) 26b containing the second centrifugal fan 22b. The first scroll case portion 26a is provided with a first suction port (outside air suction portion) 28a which opens in the front direction of the vehicle, and the scroll case portion 26b
Has a second suction port (air suction portion,
Inside air suction portion) 28b is formed. These first and second suction ports 28a and 28b are arranged at positions substantially facing each other.

The first and second suction ports 28a, 28b
Have circular shapes corresponding to the first and second centrifugal fans 22a and 22b, respectively.
The diameter of the first suction port 28a is equal to the diameter of the second
It is larger than the diameter of the suction port 28b. First,
The suction ports 24, 25 of the second centrifugal fans 22a, 22b are:
The first and second suction ports 28a and 28b are disposed so as to substantially face each other.

The electric motor 23 is connected to the first suction port 2.
Motor body 23b disposed so as to penetrate through 8a
And a rotating shaft 23 rotatably supported by the motor body 23b and extending toward the inside of the scroll casing 26a.
a. The electric motor 23 is arranged so that its axial direction is substantially horizontal. Further, the motor main body 23b is integrally provided with an iron motor casing 232 containing an iron component and a resin motor casing 230 containing the motor casing 232.

Here, the motor casings 230, 232
Among them, a cooling pipe insertion hole (not shown) for attaching a cooling pipe (not shown) is formed on a surface opposite to the rotating shaft 23a.
The surface 23c of the 232 on the rotation shaft 23a side is entirely open. The cooling pipe extracts a part of the air from the air passage in the first sucrose case portion 26a and guides the air into the motor casings 230 and 232.
The introduced air is returned from the open surface 23c into the first sucrose case 26a.
Thereby, the components inside the motor main body 23b are cooled to increase the durability.

The first and second scroll cases 2
6a, a partition wall 29a for an air passage which forms a boundary between 26b,
29b is integrally formed over the entire circumferential surface of the inner wall surface of the scroll case portion 26 in a shape protruding inward from the inner wall surface. Thus, the first air passage 30a and the second air passage 30b are formed in the scroll case 26 so as to be arranged in the vehicle front-rear direction.

Further, the opening edge of the second suction port 28b of the second scroll case portion 26b protrudes outward from the case portion 26b and has a bell-mouth-shaped suction so as to increase in diameter toward the outside. The guide 32 is integrally formed. The suction guide 32 is provided in the second centrifugal fan 2.
This is for allowing air to smoothly flow into the suction port 25 of the nozzle 2b, thereby improving suction efficiency and reducing noise during suction.

Then, as shown in FIG. 2, the spiral air flow generated by the blower 19 is blown straight into the second fan casing 20b in the vehicle width direction toward the evaporator 3 in the air conditioner unit 2. The blowout part 27 for making it blow is integrally formed. This outlet 2
7 is formed such that an air passage formed therein is enlarged from the second fan casing 20b side toward the air conditioner unit 2 side.

The first and second air passages 30a, 30a, 3b are also formed inside the blowout portion 27 by air passage partition walls 29c.
0b is sectioned. When the inside / outside air blowing unit 1 and the air conditioner unit 2 are connected, the first air passage 30a communicates with the first air passage 8a of the air conditioner unit 2, and the second air passage 30b communicates with the air conditioner unit 2. It communicates with the second air passage 8b.

As shown in FIGS. 3 and 4, the centrifugal fan 22 of the blower 19 has a flow path for air sucked by the first centrifugal fan 22a and a flow path for air sucked by the second centrifugal fan 22b. A fan partition wall (coupling member, fan partition member) 36 is provided for partitioning, that is, for preventing the two airs from mixing. The fan partition wall 36 has a substantially conical shape extending radially inward of the centrifugal fan 22.

The rotating shaft 23a of the electric motor 23 is
When the electric motor 23 is inserted into the suction port 24 of the first centrifugal fan 22a, the centrifugal fan 22 is inserted into the cylindrical rotary shaft support portion 36a formed at the top of the fan partition wall 36. Are coupled to the rotation shaft 23a. As a result, the centrifugal fan 22 becomes rotatable with the rotation of the rotating shaft 23a.

Further, since the outer diameter of the first centrifugal fan 22a is larger than that of the second centrifugal fan 22b, the outer peripheral portion of the fan partition wall 36 becomes a part of the outer shape of the first centrifugal fan 22a. I have. The fan partition wall 36
And the protruding ends of the air passage partition walls 29a and 29b are arranged so as to overlap in the axial direction of the centrifugal fan 22. Thereby, it is possible to prevent the air flowing through the first air passage 30a from mixing with the air flowing through the second air passage 30b.

The fan partition wall 36 is formed with a stepped portion 36b having a stepped shape.
The projecting ends of the air passage partition walls 29a and 29b are opposed to each other. 1 and 2, illustration of the stepped portion 36b is omitted. Here, a mounting stay 31 is integrally formed with the motor casing 230 of the electric motor 23.
The motor casing 230, that is, the motor body 2 is fixed by being fixed to the first suction port 28a of the first scroll case portion 26a with fastening means such as a screw while being fitted to the first suction port 28a.
3b is held in a state penetrating the first suction port 28a.

The mounting stay 31 is connected to the first suction port 2.
8a, and an annular portion 31b having a shape fittable with the annular portion 3a.
As shown in FIG. 1, three stay portions 31 a extending from the inner peripheral portion of the motor 1 b toward the center portion (the outer peripheral portion of the motor casing 230) are formed.
1a is a motor casing 230 of the motor body 23b.
It is integrally molded with. The air on the upstream side of the mounting stay 31 flows into the suction port 24 of the first centrifugal fan 22a through the space between the stay part 31a and the annular part 31b.

When the mounting stay 31 is fitted in the first suction port 28a, the inner peripheral portion of the mounting stay 31 is formed so as to expand in diameter toward the outside of the scroll case 26, whereby the mounting stay 31 is formed. The same operation as the suction guide 32 is performed. The outer peripheral portion of the motor main body 23b, that is, the motor casing 230 has a substantially L-shaped cross section in the radial direction (see FIG. 3), and a flange portion 231 that opens to the fan partition wall 36 side. It is molded integrally. The front shape (the shape viewed from the right side in FIG. 3) of the flange portion 231 is annular. The flange 231
Are arranged so as to axially overlap the outer peripheral portion of the motor main body 23b.

The fan partition wall 36 protrudes annularly from the fan partition wall 36 toward the motor main body 23 b, and the protruding end thereof is disposed on the inner peripheral portion of the flange portion 231. The protrusion 36c is integrally formed. Thus, the protruding end of the fan-side protruding portion 36c is disposed so as to overlap the outer peripheral portion of the motor main body 23b and the flange portion 231.
c and the flange portion 231, the motor body 2
A labyrinth structure is formed on the outer periphery of 3b.

Here, the fan-side protrusion 36c rotates with the rotation of the first centrifugal fan 22a, and the outer periphery and the flange of the motor body 23b are rotated so that the fan-side protrusion 36c rotates smoothly. The fan-side protruding portion 36c is arranged with a minute gap from the inner peripheral portion of the fan 231. The distance of this minute gap is, for example, about 3 mm. In addition, the flange 231 and the fan-side protrusion 36
The overlap length L of c is, for example, about 10 mm.

Next, a method of assembling the inside / outside air blowing unit 1 will be briefly described. First, fan casing 2
1 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. Next, in FIG. 3, the suction port 2 of the first centrifugal fan 22a having a large outer diameter is used.
The electric motor 23 is inserted into the fan 4, and the rotating shaft 23 a of the electric motor 23 is attached to the fan partition wall 36.
9 is assembled in advance. Thereafter, with the axial direction of the centrifugal fan 22 as the insertion direction, the blower 19 is connected to the first suction port 28a.
Into the scroll case 26 from the
1 is the first suction port 28a of the first scroll case 26a.
To the mounting stay 3 by fastening means such as screws.
1 is fixed to the scroll case 26.

As a result, the blower 9 is fixed to the scroll case 26. When the blower 19 is attached to the scroll case 26 in this way, the first centrifugal fan 22a is arranged in the first air passage 30a, and the second centrifugal fan 22b is arranged in the second air passage 30b. In FIG. 1, the inside / outside air case 18 is attached to the fan casings 20a and 20b from above, and is fixed by fastening means such as screws or C-shaped clips.
By attaching the cover case from the rear of the middle vehicle to the front of the vehicle, the inside / outside air blowing unit 1 is assembled.

Next, the operation of this embodiment in the above configuration will be briefly described. In FIG. 2, the inside and outside air blowing unit 1
Air flowing from the evaporator 3 flows in a substantially horizontal direction.
Flows into the lower part of. And the blast air is evaporator 3
After being dehumidified and cooled by the above, it flows further upward, is introduced into the heater core 4, and is heated here. In the case of this example, the air mixing doors 6a and 6b are used as the air-conditioning temperature control means, and the degree of opening of the air mixing doors 6a and 6b causes the air passing through the heater core 4 and the air bypassing the heater core 4 to flow. The desired blown air temperature is created by adjusting the air volume ratio. 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, the function of the above-described inside / outside air blowing unit 1 will be briefly described.
As shown in FIG. 3, when the first inside air inlet 17a is opened and the switching door 33 for opening and closing the second inside air inlet 17b is operated to the position shown in FIG. 3, the first and second suction ports 28a 28b , The inside air is sucked into the first and second centrifugal fans 22a, 22b. As a result, inside air is taken into both the first air passage 30a and the second air passage 30b, and the first and second air passages 8 are formed.
Inside air is blown to both a and 8b.

When the outside air inlet 16 is opened by the rotary door 21 and the switching door 33 is operated to the position shown in FIG. 3 to open the second inside air inlet 17b, the first inlet 28a is opened. Is sucked into the outside air, and the outside air is sucked into the first centrifugal fan 22a. As a result, the first
Outside air is blown into the first air passage 8a through the air passage 30a. On the other hand, inside air is sucked from the second suction port 28b, and the inside air is sucked into the second centrifugal fan 22b. As a result, inside air is blown into the second air passage 8b through the second air passage 30b (hereinafter, referred to as a two-layer flow mode).

Further, when the outside air introduction port 16 is opened by the rotary door 21 and the switching door 33 is operated to the position shown in FIG. 3, the first and second suction ports 28a 28
b, the outside air is sucked into the first and second centrifugal fans 22.
Outside air is sucked into both a and 22b. As a result, the first and second air passages 30a and 30b pass through the first and second air passages 30a and 30b.
Outside air is blown into both the blowing paths 8a and 8b.

The outside air or inside air from the outside air inlet 16 or the first and second inside air inlets 17a, 17b is sucked from the first and second suction ports 28a, 28b, respectively. The air flows along the front-rear direction of the vehicle along the inlets 2 of the first and second centrifugal fans 22a and 22b.
It is sucked in from 4, 25 and further blown out in the left-right direction of the vehicle.

Therefore, 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 warm air. The above-described 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. In other words, the inside and outside air blowing unit 1 is partitioned into two flow paths of the first and second blowing paths 30a and 30b by the air passage partitioning walls 29a and 29b. The plates 7A to 7C divide the air passage into a first air passage 8a and a second air passage 8b.
At the same time, the communication ports 15E of the first and second ventilation passages 8a and 8b on the leeward side of the heater core 4 are closed by the foot door 13c in the foot mode and in the combined use of the foot and the differential mode.

Accordingly, in both modes, the outside air flowing into the first communication passage 8a passes through the evaporator 3 and the heater core 4 and then passes through the defroster blow air passage 12 and the side face blow air passage 10 to pass through the vehicle window glass and It is blown out toward the vicinity of the occupant's upper body. Here, by heating the low-humidity outside air with the heater core 4 to generate hot 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 communication passage 8b, and the inside air is heated by the heater core 4 to generate warm air, which is blown out from the foot outlet 11a to the foot portion of the occupant through the foot outlet air passage 11. . 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 achieve both the improvement of the fogging prevention effect of the vehicle window glass and the improvement of the heating effect. In the present embodiment, the following effects can be obtained by adopting the above-described configuration. Since the evaporator 3 and the heater core 4 are both arranged in a substantially horizontal direction and have a layout in which the evaporator 3 and the heater core 4 are overlapped in the vertical direction, the space for the heat exchanger section in the vertical direction can be made very small, and as a result, the height is higher than that of the conventional center-mounted unit. The dimensions can be made sufficiently small.

Further, since the blast air is introduced from below the two heat exchangers (evaporator 3 and heater core 4) arranged in a substantially horizontal direction, and the blast air is led out to the upper side, the conventional center-placed unit can be used. As described above, there is no need to provide a ventilation duct section before and after the heat exchanger section, and the dimension in the vehicle front-rear direction can be significantly reduced. In the present embodiment, the outer diameter of the first centrifugal fan 22a is
The reason for making the outer diameter larger than the above is as follows.

In the present embodiment, when the side face air outlet is closed by the occupant in the above-described foot differential combined mode, the outside air flowing through the first air passage 8a and the second air
The ratio of the amount of air to the inside air flowing through the air passage 8b is set to approximately 5 to 5. Since such an air conditioner is actually installed in a vehicle interior, an external duct is connected to the outside air inlet 16 to take in outside air. Thereby, when the outside air is taken into the first air passage 8a from the outside air inlet 16, the suction resistance becomes larger than that of the inside air, and the first air passage 8a becomes harder to flow than the second air passage 8b. The air volume from the side face outlet, the center face outlet, and the defroster outlet located downstream of the first air passage 8a decreases.

Further, since the electric motor 23 is inserted into the suction port 24 of the first centrifugal fan 22a, the suction resistance of the first centrifugal fan 22a is increased to increase the side face outlet, the center face outlet, and the defroster outlet. The airflow from the air will be reduced. Therefore, in the present embodiment, a sufficient amount of air is blown into the first air passage 30a and the ratio of the amount of air is set to 5: 5.
The first centrifugal fan 22a increases the air blowing capacity (the same rotation speed) between the first centrifugal fan 22a that blows air to the second centrifugal fan 8a and the second centrifugal fan 8a that blows air to the second air passage 8b.
The outer diameter of the first centrifugal fan 22a is increased.

The effects provided by the provision of the flange 230 and the fan-side protrusion 36c will be described below. First, as described above, since the first and second centrifugal fans 22a and 22b are integrally formed, the inlets 24 and 25 of the fans 22a and 22b are necessarily limited to one side in the axial direction. . In addition, since the above-mentioned fan partition wall 36 is disposed on the other side surface in the axial direction, the electric motor 23 that rotationally drives the fans 22a and 22b is provided.
Represents at least one suction port (in this embodiment, suction port 2
4) The electric motor 23 must be inserted on the side.

Since the electric motor 23 is inserted at least into the suction port 24 for sucking the outside air as in the present embodiment, the water in the outside air sucked from the upper side of the electric motor 23 loses the electric motor due to gravity. It is arranged to drop to the 23 side. On the other hand, the fan-side protrusion 3
Since the labyrinth structure is formed on the outer peripheral portion of the motor main body 23b by the 6c and the flange portion 231, the water is suppressed from entering the inner peripheral portion of the fan-side protruding portion 36c. Intrusion into the surface 23c of the motor body 23b on the side of the rotating shaft 23a can be suppressed.

When the electric motor 23 is stopped, water adhering to the upper portion of the electric motor 23 on the scroll casing portion 26a and the wall surface of the first centrifugal fan 22a moves toward the electric motor 23 due to gravity. Although it falls, similarly, the intrusion of water into the surface 23c on the side of the rotating shaft 23a can be suppressed. As a result, intrusion of water into the motor body 23b is suppressed, and the problem that the components inside the motor body 23b rust and durability is significantly reduced can be suppressed.

The flange 231 is connected to the motor body 2
3b, the water dropped on the upper surface of the flange portion 231 moves to the lower portion of the electric motor 23 along this surface, and the water is Is prevented from entering the rotary shaft 23a side. Here, in the present embodiment, since the surface 23c of the motor main body 23b on the side of the rotation shaft 23a is entirely open, by adopting the labyrinth structure,
Intrusion of water into the motor body 23b can be effectively suppressed.

Further, since the mounting stay 31 and the flange portion 231 are formed integrally with the motor casing 230, the number of parts can be reduced and the cost can be reduced. (Other Embodiments) First, in the above embodiment, the flange portion 231 may be omitted. According to this, the motor main body 2 is formed by the fan-side protrusion 36c.
The upper side of the surface 23c of the rotary shaft 23a on the side of the rotary shaft 23a is covered, and the outer peripheral portion of the upper portion overlaps with the protruding end of the fan-side protruding portion 36c. At this time, water that falls from above the electric motor 23 to the electric motor 23 side is exposed to the fan-side protrusion 36c.
Of the motor main body 23b on the rotating shaft 23a side can be suppressed.

In the above embodiment, the motor body 2
The outer peripheral portion of the motor 3b and the fan-side protrusion 36c overlap each other.
A motor-side protruding portion that protrudes substantially annularly from the outer peripheral portion of the a-side surface 23c toward the fan partition wall 36 may be provided, and the motor-side protruding portion and the fan-side protruding portion 36c may be arranged so as to overlap. Good. In this case, the motor-side protruding portion forms an outer peripheral portion of the motor main body portion 23b.

In the above embodiment, the motor body 2
Although the flange portion 231 is provided on the entire outer peripheral portion of the motor 3b, the flange portion 231 may be provided only on the outer peripheral portion of the portion of the motor main body 23b which is disposed on the upper side. According to this, the electric motor 23
It is possible to suppress the water falling from the upper side to the electric motor 23 side from entering the upper side portion of the fan-side protruding portion 36c.

In the above embodiment, the flange 23
Although the overlap length L (see FIG. 3) between 1 and the fan protrusion 36c is about 10 mm, it may be longer or shorter. In addition, it is good that it is preferably about 2 to 20 mm. In addition, it is not necessary to apply the present invention to the inside and outside air blower unit 1 in which the inside and outside air blower unit 1 is partitioned into the first and second air passages 30a and 30b. The first to inhale outside air
If the electric motor 23 of the blower 19 is in a state of penetrating the suction port 28a, the above-described effects can be obtained by applying the present invention.

[Brief description of the drawings]

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

FIG. 2 is a top view as viewed from above (top direction) in FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a sectional view taken along the line CC of FIG. 2;

FIG. 6 is a configuration diagram of an inside / outside air blowing unit in the prior application device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Inside and outside air blowing unit (blowing unit), 22a ... 1st centrifugal fan (outside air centrifugal fan), 23 ... Electric motor, 23a ... Rotating shaft, 23b ... Motor main body part, 231 ...
Flange portions, 26a, 26b: First and second scroll casing portions (casing), 27: Blow-out portion (air outlet portion), 28a: First suction port (outside air suction portion), 36: Fan partition wall (coupling member) , Fan partition member), 36c ...
Fan side protrusion.

Continued on the front page (72) Kazufumi Shikata 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Nippon Denso Co., Ltd. (72) Inventor Yuki Kato 1-Toyota-cho, Toyota-shi, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Goro Uchida 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation

Claims (4)

[Claims] An outside air suction portion (28) for sucking outside air.
a), a motor body (23b) disposed so as to penetrate the outside air suction portion (28a), and rotatably supported by the motor body (23b). , Casing (26
a, 26b) a rotating shaft (23a) extending inward,
An electric motor (23) arranged so that its axial direction is substantially horizontal; and an electric motor (23) arranged inside the casings (26a, 26b) coaxially with the electric motor (23). A centrifugal fan for outside air (22a) that draws in the outside air from a side surface (24), and the centrifugal fan for outside air (22a) is mounted on the other axial side of the centrifugal fan for outside air (22a). A coupling member (36) that couples to the rotation shaft (23a) of the motor (23) is provided. The coupling member (36) is provided from the coupling member (36) toward the motor body (23b). A fan-side protruding portion (36c) that protrudes in a substantially annular shape; an outer peripheral portion of at least an upper portion of the motor body (23b);
A blower unit, wherein the blower unit is disposed so as to overlap with the protruding end of 6c). 2. An outer peripheral portion of at least an upper portion of the motor main body portion (23b) has a substantially L-shaped cross section and overlaps a protruding end portion of the fan-side protruding portion (36c). A flange portion (231) is provided as described above, and a labyrinth structure is provided on the outer peripheral portion of the motor main body portion (23b) by the fan-side protruding portion (36c) and the flange portion (231). A blower unit characterized by being formed. 3. A part of the casing (26a, 26b) substantially facing the outside air suction part (28a),
An air suction portion (28b) for sucking at least one of the inside air and the outside air is also provided, and the one side surface (24) of the centrifugal fan for outside air (22a) is provided.
Is disposed so as to be substantially opposed to the outside air suction portion (28a). Inside the casing (26a, 26b), the other side surface of the outside air centrifugal fan (22a) is provided with the outside air A second centrifugal fan (22b) is integrally provided coaxially with the centrifugal fan (22a). The coupling member includes a flow path on the side of the outside air centrifugal fan (22a) and the second centrifugal fan. 3. The blower unit according to claim 1, wherein the blower unit comprises a fan partition member (36) that partitions the flow path on the side of the fan (22 b). 4. 4. The air suction section (28b) is an inside air suction section (28b) for sucking at least inside air, the second centrifugal fan is a inside air centrifugal fan (22b), and the casing (26a). , 26b), wherein the outside air centrifugal fan (22a) and the inside air centrifugal fan (22b) separate the inside air from the outside air and send the air therethrough. .