JP2023104278A - Air blower for vehicular air conditioner - Google Patents

Abstract

To prevent water from entering a motor cooling air inlet even if air within a scroll flows so as to wind up upwardly.SOLUTION: A motor cooling air inlet is formed in the side wall portion of a scroll at the downstream side of an air flowing direction and at a portion upwardly apart from a bottom wall portion. Guide portions 21a and 21b which guide water sticking to an upper wall portion 15a in the outlet direction of the scroll and in the direction apart from the motor cooling air inlet are provided on the upper wall portion 15a at the downstream side of the air flowing direction relative to a blower fan in the scroll.SELECTED DRAWING: Figure 5

Description

TECHNICAL FIELD The present disclosure relates to a blower of a vehicle air conditioner mounted on, for example, an automobile.

For example, a vehicle air conditioner mounted on an automobile or the like includes an air conditioning unit containing a heat exchanger, an air mix damper, a blowout direction switching damper, etc. Air for air conditioning is blown to the air conditioning unit by a blower. It has become so. The blower includes a blower casing having an outside air introduction port for introducing air outside the vehicle compartment and an inside air introduction opening for introducing air inside the vehicle compartment. A damper or the like is provided, and switching between an inside air circulation mode in which inside air is introduced from the inside air introduction port and an outside air introduction mode in which outside air is introduced from the outside air introduction port can be performed by the operation of the inside/outside air switching damper.

A scroll for accommodating a blower fan is formed in the lower part of the blower casing, and a motor for driving the fan is attached to the lower part of the scroll. The motor is supplied with air flowing through the inside of the blower casing as cooling air. If the water reaches the motor together with the cooling air, the motor may be damaged.

For example, in the blower disclosed in Patent Document 1, a cooling air intake passage that communicates with a passage leading to the motor and a communication passage that communicates with a peripheral passage outside the blower casing are formed. , the connecting passage is positioned downstream of the cooling air intake passage in the air flow.

Further, in the blower disclosed in Patent Document 2, a plurality of grooves are formed in a region facing the fan in the bottom wall portion of the blower casing so that water that has entered the fan region is allowed to flow through the grooves.

Further, in the blower disclosed in Patent Document 3, a drain hole is formed in the bottom wall portion of the blower casing as a means for draining water that has entered the bottom wall portion.

Japanese Patent Application Laid-Open No. 2017-200806 JP 2015-52293 A JP-A-2003-48423

By the way, the shape of the radially outer surface of the scroll inner wall of the blower casing may not be smooth due to, for example, restrictions on the layout of parts inside the vehicle, and a part of the surface may become airflow resistance. In such a scroll, the airflow is turbulent or divided at a portion that causes airflow resistance, and the airflow is not directed uniformly toward the exit of the scroll. Depending on the position and shape of the portion that becomes airflow resistance, the air flowing radially outward of the scroll may flow radially inward through the vicinity of the upper wall portion of the scroll.

On the other hand, considering that the water that has entered the scroll tends to accumulate on the bottom wall, it is preferable to open the motor cooling air intake at a location away from the bottom wall. However, as described above, the air inside the scroll may flow toward the vicinity of the upper wall, and the water carried by such air flows into the motor cooling air intake located above the bottom wall. and enter the motor cooling air intake.

The present disclosure has been made in view of this point, and its object is to prevent water from entering the motor cooling air intake even when the air in the scroll flows upward. is to suppress the

In order to achieve the above object, the first aspect of the present disclosure can be premised on a blower for a vehicle air conditioner that includes a blower casing in which a centrifugal blower fan is housed. An outside air inlet for introducing air outside the passenger compartment is formed in the upper part of the blower casing, and below the outside air inlet in the blower casing, the rotation shaft of the blower fan is arranged in the vertical direction. A scroll is formed that accommodates in an extended position. A motor for driving the blower fan is fixed to the lower portion of the scroll. A motor for supplying the air inside the scroll to the motor and having an opening at a portion spaced upward from the bottom wall of the scroll on the side wall portion of the scroll downstream of the blowing fan in the air flow direction. A cooling air intake is formed in the upper wall of the scroll downstream of the blower fan in the air flow direction so that water adhering to the upper wall is removed in the direction of the scroll exit and the motor cooling air intake. A guide is provided for guiding in a direction away from.

According to this configuration, when water enters the inside of the blower casing through the outside air introduction port, it reaches the inside of the scroll formed below the outside air introduction port. Since the motor cooling air intake is open at a position away from the bottom wall, entry of water present in the bottom wall into the motor cooling air intake is suppressed. may flow toward the vicinity of the upper wall portion, and water carried by such air flow adheres to the upper wall portion of the scroll. The water adhering to the upper wall of the scroll tends to flow downstream due to the flow of air toward the outlet of the scroll. Intrusion into the intake is suppressed.

In a second aspect of the present disclosure, the guide portion is configured by a ridge portion projecting downward from the upper wall portion and extending in an outlet direction of the scroll. According to this configuration, the water adhering to the upper wall of the scroll can be reliably guided by the ridge in the direction of the exit of the scroll and in the direction away from the motor cooling air intake. The number of ridges may be two or more, and in this case, a plurality of ridges may be spaced apart from each other.

In a third aspect of the present disclosure, the guide portion is configured by a groove formed in the upper wall portion. According to this configuration, the water adhering to the upper wall portion of the scroll is guided inside the groove, so that the flow of water toward the motor cooling air intake can be stopped. The number of grooves may be two or more, in which case a plurality of grooves may be spaced apart from each other.

In a fourth aspect of the present disclosure, the guide portion is configured by a stepped portion formed so as to be positioned higher as the distance from the motor cooling air intake increases. According to this configuration, the water adhering to the upper wall of the scroll tends to flow upward due to the flow of air toward the upper wall, so that the water flows away from the motor cooling air intake at the stepped portion. . As a result, the water on the upper wall is prevented from flowing toward the motor cooling air intake.

In a fifth aspect of the present disclosure, a side wall portion of the scroll on the downstream side in the air flow direction of the blower fan is provided with a protruding portion that protrudes toward the inside of the scroll below the center portion in the vertical direction. It is

According to this configuration, part of the air flowing inside the scroll becomes an upward flow due to the presence of the protrusion, so that water tends to adhere to the upper wall, but the upper wall has a guide portion. Therefore, entry into the motor cooling air intake is suppressed. In other words, the effect of providing the guide portion becomes even more remarkable.

In a sixth aspect of the present disclosure, the protrusion is a control device that controls the rotation speed of the motor. According to this configuration, since the control device is arranged inside the scroll, the cooling efficiency of the control device is improved.

In the seventh aspect of the present disclosure, since the projecting portion is arranged below the motor cooling air intake, the flow of air toward the upper wall portion of the scroll tends to increase, but the guiding portion is provided. Therefore, even if the flow of air toward the upper wall portion of the scroll increases, it is possible to effectively suppress the entry of water into the motor cooling air intake.

In the eighth aspect of the present disclosure, the upper wall portion of the scroll on the downstream side in the air flow direction of the blower fan can be inclined so that the closer it is to the exit of the scroll, the higher it is positioned. , the passage cross section of the scroll can be gradually enlarged to improve the air blowing efficiency.

As described above, the water adhering to the upper wall of the scroll can be guided in the direction away from the motor cooling air intake. , water can be suppressed from entering the motor cooling air intake.

1 is a schematic configuration diagram of a vehicle air conditioner provided with a blower according to an embodiment of the present invention; FIG. It is a front view of an air blower. It is a longitudinal cross-sectional view which shows the vicinity of the air conditioning unit side of an air blower. FIG. 3 is a cross-sectional view taken along line IV-IV in FIG. 2; FIG. 5 is a cross-sectional view taken along line VV in FIG. 4; FIG. 5 is a view corresponding to FIG. 5 according to Modification 1 of the embodiment; FIG. 5 is a view corresponding to FIG. 5 according to Modification 2 of the embodiment; FIG. 5 is a view corresponding to FIG. 5 according to Modification 3 of the embodiment. FIG. 5 is a view corresponding to FIG. 5 according to Modification 4 of the embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. It should be noted that the following description of preferred embodiments is essentially merely illustrative, and is not intended to limit the invention, its applications, or its uses.

FIG. 1 shows a cross-sectional view of a schematic configuration of a vehicle air conditioner 100 including a blower 1 according to an embodiment of the present invention. A vehicle air conditioner 100 is mounted, for example, in an automobile or the like to air-condition the interior of the vehicle. The configuration of the air conditioning unit 2 shown in FIG. 1 is an example, and is not limited to the illustrated configuration. When the vehicle air conditioner 100 is installed inside the vehicle, it can be housed inside an instrument panel (not shown), for example. In the description of this embodiment, the left-right direction and the front-rear direction are defined as shown in each figure, but this is only defined for the convenience of the description, and the actual mounting state on the automobile and the time of manufacture are defined. The direction is not limited to the above, and it may be mounted on a vehicle in a state in which left and right or front and rear are reversed.

The air conditioning unit 2 includes a cooling heat exchanger 3, a heating heat exchanger 4, and an air conditioning casing 5 that accommodates these heat exchangers 3 and 4. As shown in FIG. The air-conditioning casing 5 is formed with an inlet 5a into which the air-conditioning air blown from the blower 1 flows. An air mix damper 6 is housed inside the air conditioning casing 5 . The air mix damper 6 is a member for adjusting the amount of air passing through the heating heat exchanger 4 out of the air passing through the cooling heat exchanger 3 . By changing the opening/closing state of the air mix damper 6, the temperature of the conditioned air can be adjusted.

A defroster outlet 5b, a vent outlet 5c, and a heat outlet 5d are formed on the downstream side of the air conditioning casing 5. As shown in FIG. The air-conditioning casing 5 accommodates a defroster damper 7 for opening and closing the defroster outlet 5b, a vent damper 8 for opening and closing the vent outlet 5c, and a heat damper 9 for opening and closing the heat outlet 5d. By individually opening and closing the defroster damper 7, the vent damper 8, and the heat damper 9, the conditioned air blowing mode can be switched.

The blower 1 includes a centrifugal blower fan 10 and a blower casing 11 that houses the blower fan 10 . The blower casing 11 is composed of a plurality of members formed by molding resin, for example. An outside air introduction port 11a for introducing air outside the vehicle compartment and an inside air introduction port 11b for introducing air inside the vehicle compartment are formed in the upper portion of the blower casing 11 . The outside air inlet 11a communicates with the outside of the passenger compartment via a duct (not shown) or the like. The inside air introduction port 11b opens into the vehicle interior.

An inside/outside air switching damper 12 is housed inside the blower casing 11 . The inside/outside air switching damper 12 includes a rotary shaft 12a that is rotatably supported on the upper portion of the blower casing 11, and a blocking plate portion 12b that extends radially from the rotary shaft 12a. An inside/outside air switching actuator 13 is connected to the rotating shaft 12a, and the output of the inside/outside air switching actuator 13 is transmitted to the rotating shaft 12a. When the inside/outside air switching damper 12 rotates to the position indicated by the solid line in FIG. 1, the outside air introduction port 11a is closed by the closing plate portion 12b, and the inside air introduction port 11b is opened to enter the inside air circulation mode. On the other hand, when the inside/outside air switching damper 12 rotates to the position indicated by the phantom line in FIG. 1, the outside air introduction port 11a is opened by the closing plate portion 12b and the inside air introduction port 11b is closed to enter the outside air introduction mode.

An air filter 14 is arranged below the inside/outside air switching damper 12 inside the blower casing 11 . The outside air introduced from the outside air introduction port 11a and the inside air introduced from the inside air introduction port 11b flow downward inside the blower casing 11, pass through the air filter 14, and are filtered.

Below the outside air introduction port 11a and the inside air introduction port 11b of the blower casing 11, a scroll 15 for accommodating the blower fan 10 is formed. An upper wall portion 15a of the scroll 15 is formed with a bell mouth port 15b for introducing the air above the upper wall portion 15a into the inside of the scroll 15. The inside and the space above the scroll 15 communicate with each other. Therefore, the conditioned air introduced into the blower casing 11 forms a downward flow inside the blower casing 11 and flows into the scroll 15 .

A motor 17 that drives the blower fan 10 is fixed to the lower portion of the scroll 15 . The motor 17 has a main body portion 17a including a stator and the like, and an output shaft 17b projecting upward from the upper portion of the main body portion 17a. The body portion 17a is arranged directly below the rotation axis X of the blower fan 10 and is detachably attached to the bottom wall portion 15d of the scroll 15 by a motor flange (not shown) or the like. A radial center portion of the blower fan 10 is fixed to the upper portion of the output shaft 17b.

As shown in FIG. 1, the air conditioning unit 2 side (left side) of the scroll 15 has a connection duct portion 16 formed so as to protrude leftward. An outlet 15 e of the scroll 15 is formed at the left end of the connecting duct portion 16 . The outlet 15e of the scroll 15 is connected to the inlet 5a of the air conditioning casing 5. As shown in FIG. In this embodiment, the connection duct portion 16 constitutes a part of the scroll 15 , and specifically constitutes a portion of the scroll 15 on the downstream side in the air flow direction of the blower fan 10 .

Inside the scroll 15 , an air passage R in which the air blown out from the outer peripheral portion of the blower fan 10 gathers is formed so as to surround the blower fan 10 . The blower fan 10 is arranged so that the rotation axis X (shown only in FIG. 2) extends vertically. Therefore, the conditioned air that has flowed into the inside of the scroll 15 from the bell mouth port 15b is sucked into the inside of the blower fan 10. As shown in FIG.

As shown in FIG. 4 , a nose portion 15 c is formed at the winding start portion of the scroll 15 so as to be closest to the outer peripheral portion of the blower fan 10 . In this embodiment, the nose portion 15c is positioned at the middle portion of the scroll 15 in the front-rear direction on the left side of the blower fan 10. As shown in FIG.

An upstream end of the air passage R is located at a portion corresponding to the nose portion 15c. The air passage R extends from a portion corresponding to the nose portion 15 c so as to pass through the rear, right side, and front of the blower fan 10 in order, and then extends left inside the connecting duct portion 16 . . As a result, the conditioned air blown out from the outer peripheral portion of the blower fan 10 circulates in a circle inside the scroll 15 and then forms a leftward flow. The downstream end of the air passage R is positioned at the left end inside the connecting duct portion 16 . The downstream end of the air passage R is connected to the inlet 5 a of the air conditioning casing 5 so that the conditioned air inside the scroll 15 directly flows into the air conditioning casing 5 .

As shown in FIG. 3, the portion of the upper wall portion 15a of the scroll 15 on the downstream side of the blower fan 10 in the air flow direction, i. It is slanted so that the closer it is, the higher it is positioned. Specifically, the upper wall portion 16a of the connection duct portion 16 is positioned above the bell mouth opening 15b, and is formed so that the left end portion is the highest. A portion of the bottom wall portion 15d of the scroll 15 on the downstream side of the blower fan 10 in the air flow direction, that is, the bottom wall portion 16b of the connection duct portion 16 is positioned below the lower end portion of the blower fan 10. ing. As a result, the cross-sectional area of the air passage R inside the scroll 15 expands toward the downstream side. 2 and 3 is a dividing line of members constituting the scroll 15. With this line A as a boundary, the scroll 15 is constituted by the lower member 15A and the upper member 15B. there is The position and shape of the line A are arbitrary, and are not limited to the illustrated position and shape.

As shown in FIG. 3 , a motor cooling air intake port 18 is formed downstream of the blower fan 10 in the air flow direction in the radially inner side wall portion 15 f of the scroll 15 on the rear side. The motor cooling air intake 18 is for supplying the air inside the scroll 15 to the main body 17a of the motor 17 as cooling air. It is open at a portion spaced upward from the bottom wall portion 16b). That is, as shown in FIGS. 2 and 4 , a cooling air duct 20 is formed outside the scroll 15 for guiding the air flowing out from the motor cooling air intake 18 to the main body 17 a of the motor 17 . The upstream end of the cooling air duct 20 is arranged at a portion corresponding to the motor cooling air intake 18 in the side wall 15 f of the scroll 15 and communicates with the motor cooling air intake 18 . The cooling air duct 20 extends downward from a portion corresponding to the motor cooling air intake 18 and then extends below the bottom wall 15 d until it reaches the main body 17 a of the motor 17 . A downstream end of the motor cooling air intake 18 communicates with the interior of the main body 17a. The flow of the cooling air is indicated by dashed arrows in FIG. The cooling air introduced into the body portion 17a flows out into the scroll 15 again.

The motor cooling air intake port 18 is located above the central portion of the connection duct portion 16 in the vertical direction. The vertical dimension of the motor cooling air intake 18 is set to be longer than the horizontal dimension, and the motor cooling air intake 18 is elongated in the vertical direction. An upper portion of the motor cooling air intake 18 is formed in the upper member 15B, and a lower portion of the motor cooling air intake 18 is formed in the lower member 15A. A motor cooling air intake 18 is formed by combining them. The shape of the motor cooling air intake port 18 is not particularly limited, and may be a shape elongated in the left-right direction, or may be square, circular, or the like.

A protruding portion 19 protruding toward the inside of the scroll 15 is provided on the radially outer side wall portion 15 g of the scroll 15 downstream of the blower fan 10 in the air flow direction. The projecting portion 19 is a control device for controlling the rotation speed of the motor 17, and the motor 17 is electrically connected to this control device.

The protruding portion 19 is arranged below the vertical central portion of the connection duct portion 16 , that is, below the motor cooling air intake 18 . Specifically, when the heights of the upper end of the projecting portion 19 and the lower edge of the motor cooling air intake 18 are compared, the upper end of the projecting portion 19 is positioned lower. As a result, the projecting portion 19 and the motor cooling air intake 18 are arranged with a predetermined gap in the vertical direction.

Since the projecting portion 19 is arranged below the connecting duct portion 16 , part of the air flowing inside the scroll 15 becomes an upward flow due to the existence of the projecting portion 19 . At this time, if water enters the inside of the blower casing 11 from the outside air inlet 11a, the water may easily adhere to the upper wall portion 16a of the connection duct portion 16 along with the upward air flow. be.

If water adheres to the upper wall portion 16a of the connection duct portion 16, the water may flow to the side wall portion 15f and flow downward along the side wall portion 15f. Since the side wall portion 15f has a motor cooling air intake port 18, the water flowing downward along the side wall portion 15f enters the motor cooling air intake port 18 and reaches the motor 17, causing the motor 17 to malfunction. can cause.

In this embodiment, the upper wall portion 15a of the scroll 15 is provided at the downstream side of the blower fan 10 in the air flow direction, specifically, at the upper wall portion 16a of the connection duct portion 16. First and second guide portions 21a and 21b are provided to guide water adhering to the scroll 16a in the direction of the outlet 15e of the scroll 15 and in the direction away from the motor cooling air intake 18. As shown in FIG. That is, the upper wall portion 16a of the connection duct portion 16 is provided with a first guide portion 21a on the front side at an intermediate portion in the front-rear direction, and a second guide portion 21b is provided rearwardly from the first guide portion 21a. is provided. The second guide portion 21b is closer to the motor cooling air inlet 18 than the first guide portion 21a.

The first guide portion 21a and the second guide portion 21b are each formed of a ridge portion that protrudes downward from the upper wall portion 16a of the connection duct portion 16 and extends in the direction of the outlet 15e of the scroll 15. As shown in FIG. The vertical dimensions of the first guide portion 21a and the second guide portion 21b are set to 2 mm or less. If the vertical dimension of the first guide portion 21a and the second guide portion 21b exceeds 2 mm, the flow resistance of the air flowing inside the connection duct portion 16 is likely to occur, resulting in deterioration of air blowing efficiency and generation of noise. However, by setting the width to 2 mm or less, the degree of deterioration in air blowing efficiency can be extremely reduced, and noise can be suppressed to an unnoticeable level. Moreover, the horizontal dimension orthogonal to the longitudinal direction of the first guide portion 21a and the second guide portion 21b is set to 2 mm or less.

An upstream end (upstream end) of the first guide portion 21a in the air flow direction reaches the vicinity of the bell mouth opening 15b. The upstream end (upstream end) of the second guide portion 21b in the air flow direction is located downstream of the upstream end of the first guide portion 21a and reaches the nose portion 15c. The downstream end (downstream end) of the first guide portion 21a in the air flow direction and the downstream end (downstream end) of the second guide portion 21b in the air flow direction are assumed to be in the same position. That is, when comparing the lengths of the first guide portion 21a and the second guide portion 21b, the first guide portion 21a is longer. In addition, the first guide portion 21a extends upstream from the second guide portion 21b.

The first guide portion 21a is spaced forward from the motor cooling air intake 18 at the middle portion of the upper wall portion 16a in the front-rear direction. , and the flow in the direction approaching the motor cooling air intake port 18 becomes difficult. Similarly, the second guide portion 21b is also separated forward from the motor cooling air intake 18 at the middle portion of the upper wall portion 15a in the front-rear direction, so that the water adhering to the upper wall portion 16a is blocked by the second guide portion 21b. As a result, it becomes difficult for the air to flow toward the motor cooling air intake port 18 .

Either one of the first guide portion 21a and the second guide portion 21b may be omitted. Further, in addition to the first guide portion 21a and the second guide portion 21b, a third guide portion (not shown) and a fourth guide portion may be provided.

(Action and effect of the embodiment)
When rotating the motor 17 of the blower 1 configured as described above, a voltage is applied to the motor 17 from the control device that configures the projecting portion 19 . The motor 17 rotates at a speed corresponding to the applied voltage. As the rotation speed of the motor 17 increases, the amount of air flowing through the air passage R of the scroll 15 increases, and the amount of air blown to the air conditioning unit 2 increases. At this time, if the outside air introduction port 11a is open, rainwater outside the passenger compartment, water during car washing, and the like enter the inside of the blower casing 11 through the outside air introduction port 11a.

On the other hand, when the amount of air blown to the air-conditioning unit 2 increases, the air flowing inside the connection duct portion 16 vigorously collides with the projecting portion 19 , and as a result, part of the air falls on the upper wall portion of the connection duct portion 16 . The water flowing toward 16a and entering the inside of the blower casing 11 may be carried to the upper wall portion 16a by the air flowing toward the upper wall portion 16a and adhere to the upper wall portion 16a.

The water adhering to the upper wall portion 16a of the connecting duct portion 16 tends to flow downstream due to the air flow toward the outlet 15e of the scroll 15. At this time, the motor is cooled by the first guide portion 21a and the second guide portion 21b. It is guided away from the wind intake 18 . Therefore, entry of water into the motor cooling air intake 18 is suppressed.

The above-described embodiments are merely examples in all respects and should not be construed in a restrictive manner. Furthermore, all modifications and changes within the equivalent scope of claims are within the scope of the present invention.

The guide portion is not limited to the ridge portion, and may be modified examples 1 to 4 shown in FIGS. 6 to 9, for example. In Modified Example 1 shown in FIG. 6, the first groove 22a and the second groove 22b formed in the upper wall portion 15a respectively constitute the guide portions. The formation position and length of the first groove 22a can be the same as those of the first guide portion 21a, and the formation position and length of the second groove 22b can be the same as those of the second guide portion 21b. can. According to this configuration, the water adhering to the upper wall portion 15a is guided inside the first groove 22a and the second groove 22b, so that the flow of water toward the motor cooling air intake 18 can be stopped. . The number of grooves may be one, or two or more. In the case of two or more, multiple grooves may be provided spaced apart from one another. Also, both the grooves and the guide portions 21a and 21b formed by the ridges may be provided.

In Modification 2 shown in FIG. 7, a stepped portion 23 formed in the upper wall portion 16a so as to be positioned upward as the distance from the motor cooling air intake port 18 increases, constitutes the guide portion. The stepped portion 23 has two steps, and on the surface of the upper wall portion 16a facing the air passage R, the rear side closer to the motor cooling air inlet 18 is the lowest, and the front side farther from the motor cooling air inlet 18 is the highest. The shape of the stepped portion 23 is set so as to be positioned at . That is, the water adhering to the upper wall portion 16 a tends to flow upward due to the air flow directed toward the upper wall portion 16 a , so that the water flows away from the motor cooling air inlet 18 in the stepped portion 23 . As a result, the water on the upper wall portion 16 a does not flow toward the motor cooling air intake port 18 .

Modification 3 shown in FIG. 8 is an example in which Modification 1 and Modification 2 are combined. That is, the surface of the upper wall portion 16a facing the air passage R is formed so that the rear side closer to the motor cooling air intake 18 is positioned at the bottom, and the front side farther from the motor cooling air intake 18 is positioned highest. In addition, a first groove 22a and a second groove 22b are formed in the portion where the height difference is provided.

Modification 4 shown in FIG. 9 is an example in which the form shown in FIG. 5 and Modification 2 are combined. That is, the surface of the upper wall portion 16a facing the air passage R is formed so that the rear side closer to the motor cooling air intake 18 is positioned at the bottom, and the front side farther from the motor cooling air intake 18 is positioned highest. In addition, a first guide portion 21a and a second guide portion 21b are formed in the portion where the height difference is provided.

INDUSTRIAL APPLICABILITY As described above, the air blower for a vehicle air conditioner according to the present invention can be applied, for example, when air-conditioning the interior of a vehicle.

1 Blower 10 Blower fan 11 Blower casing 11a Outside air inlet 15 Scroll 15a Upper wall 17 Motor 18 Motor cooling air inlet 19 Projection (control device)
21a first guide portion 21b second guide portion 100 vehicle air conditioner

Claims (8)

A blower for a vehicle air conditioner, which includes a blower casing housing a centrifugal blower fan,
An outside air inlet for introducing air outside the passenger compartment is formed in the upper part of the blower casing,
A scroll is formed below the outside air inlet in the blower casing to accommodate the blower fan with a rotating shaft extending in the vertical direction,
A motor for driving the blower fan is fixed to the lower part of the scroll,
A motor for supplying the air inside the scroll to the motor and having an opening at a portion spaced upward from the bottom wall of the scroll on the side wall portion of the scroll downstream of the blowing fan in the air flow direction. A cooling air intake is formed,
A guide portion for guiding water adhering to the upper wall portion in an air flow direction downstream side of the blower fan in the upper wall portion of the scroll in a direction toward an outlet of the scroll and away from the motor cooling air intake. A blower for a vehicle air conditioner, characterized by being provided with a. In the blower of the vehicle air conditioner according to claim 1,
A blower for a vehicle air conditioner, wherein the guide portion is formed of a ridge portion that protrudes downward from the upper wall portion and extends in an outlet direction of the scroll. In the blower of the vehicle air conditioner according to claim 1,
A blower for a vehicle air conditioner, wherein the guide portion is formed by a groove formed in the upper wall portion. In the blower for a vehicle air conditioner according to any one of claims 1 to 3,
A blower for a vehicle air conditioner, wherein the guide portion is formed of a stepped portion which is formed so as to be positioned higher as the distance from the motor cooling air intake port increases. In the blower for a vehicle air conditioner according to any one of claims 1 to 4,
A vehicle characterized in that a protruding portion protruding toward the inside of the scroll below a center portion in a vertical direction is provided on a side wall portion of the scroll downstream of the blowing fan in an air flow direction. air conditioner blower. In the blower of the vehicle air conditioner according to claim 5,
A blower for a vehicle air conditioner, wherein the projecting portion is a control device for controlling the number of revolutions of the motor. In the air conditioner blower for a vehicle according to claim 5 or 6,
A blower for a vehicle air conditioner, wherein the projecting portion is arranged below the motor cooling air intake. In the blower for a vehicle air conditioner according to any one of claims 1 to 7,
A blower for a vehicle air conditioner, wherein a downstream side of the blower fan in an air flow direction of the upper wall portion of the scroll is inclined so as to be positioned higher as it approaches an outlet of the scroll. .