JP7575860B2 - Vehicle air conditioning blower - Google Patents

Description

The present invention relates to a vehicle air conditioning blower device that is mounted on, for example, an automobile and is configured to blow air for air conditioning, and in particular belongs to the technical field of a structure in which the blower fan is driven by a motor arranged below the blower fan.

In general, air conditioners installed in vehicles are configured to select either the air inside the vehicle cabin (inside air) or the air outside the vehicle cabin (outside air) and blow it as conditioned air, adjust the temperature using a cooling heat exchanger and a heating heat exchanger, and then supply it to various parts of the vehicle cabin.

In recent years, a vehicle air conditioning blower that blows air for conditioning has been put into practical use. The blower can be switched between an inside air circulation mode that blows only inside air, an outside air introduction mode that blows only outside air, and an inside/outside two-layer air flow mode that blows both inside and outside air. That is, as disclosed in Patent Document 1, an inside air inlet and an outside air inlet are formed in the casing of the vehicle air conditioning blower, and an upper air passage and a lower air passage are formed. A blower fan is provided inside each of the upper air passage and the lower air passage, and these two blower fans are driven by a common motor. In addition, the casing is provided with an inside/outside air switching damper that opens and closes the inside air inlet and the outside air inlet, and this inside/outside air switching damper makes it possible to switch between an inside air circulation mode that opens only the inside air inlet, an outside air introduction mode that opens only the outside air inlet, and an inside/outside air two-layer air flow mode that opens the inside air inlet and the outside air inlet. When the two blower fans are rotated to set the internal air circulation mode, the internal air introduced through the internal air inlet flows into the upper and lower air passages, and when the external air introduction mode is set, the external air introduced through the external air inlet flows into the upper and lower air passages. Furthermore, when the internal/external air two-layer flow mode is set, the external air introduced through the external air inlet flows into the upper air passage, while the internal air introduced through the internal air inlet flows into the lower air passage.

In addition, in Patent Documents 2 to 4, a fan is disposed between the top surface of the motor and the bellmouth opening, and a rib protruding upward is provided on the top surface of the motor.

JP 2017-171020 A JP 2016-10279 A Patent No. 5762157 JP 2007-154856 A

However, for example, rainwater or water from washing the car can seep into the inside of the scroll casing through the outside air intake, and this water accumulates on the top surface of the motor located below the scroll casing.

In the case of Patent Document 1, the bellmouth opening for the upper air passage and the bellmouth opening for the lower air passage are spaced apart in the vertical direction, and the bellmouth opening for the lower air passage is positioned above and opposite the top surface of the motor. Given this positional relationship, when the blower fan rotates, the airflow created by the rotation of the blower fan may flow upward toward the bellmouth opening for the lower air passage and approach the output shaft of the motor. This airflow may cause water that has accumulated on the top surface of the motor to flow near the output shaft of the motor and enter the inside of the motor from near the output shaft, which may cause the motor to malfunction.

To address this issue, for example, a peripheral wall portion that protrudes upward can be provided on the top surface of the motor, as in Patent Document 1. However, because the upper end of this peripheral wall portion is located below the bellmouth opening for the lower air passage, water carried by the air current can easily pass over the peripheral wall portion and flow near the output shaft and penetrate into the interior of the motor. In the case of Patent Document 1, a bellmouth member that is separate from the peripheral wall portion is provided, and a wall portion for preventing water intrusion is further provided on this bellmouth member to prevent water intrusion, thereby suppressing water intrusion. However, because the bellmouth member and the motor are made of separate members, a gap is formed between the bellmouth member and the top surface of the motor, and it is conceivable that water could pass through this gap and flow near the output shaft of the motor.

In addition, in Patent Documents 2 to 4, a rib that protrudes upward is provided on the top surface of the motor, but in the structures of Patent Documents 2 to 4, the blower fan is disposed between the top surface of the motor and the bellmouth opening, making it difficult to make the height of the rib higher than the cone-shaped portion of the blower fan. Therefore, there is a risk that water will go over the rib, especially when the amount of air being blown is large.

The present invention was made in consideration of these points, and its purpose is to prevent water from entering the inside of the motor even when the air flow rate is high.

In order to achieve the above-mentioned object, a first invention provides a vehicle air conditioning blower device comprising: a casing having an outside air inlet for introducing air outside the vehicle cabin that is formed so as to open to the outside of the vehicle cabin; a motor body fixed to a lower part of the casing; a motor having an output shaft protruding upward from the motor body; and a blower fan arranged inside the casing and spaced upward from the motor body and connected to the output shaft, the first invention being characterized in that a bell-mouth opening is provided inside the casing and spaced upward from an upper surface of the motor body, the blower fan is arranged above the bell-mouth opening, the motor body has a cover portion that covers a rotor from above, the cover portion has an inclined wall portion that is inclined so as to be positioned higher as it approaches the output shaft, and an upper surface of the inclined wall portion has a surrounding plate portion that extends to surround the output shaft and is integrally molded with the inclined wall portion so as to reach above the bell-mouth opening.

With this configuration, because the outside air inlet is open to the outside of the vehicle compartment, rainwater or water from washing the car can seep into the inside of the casing through the outside air inlet and accumulate on the upper surface of the motor body located at the bottom of the casing. When the motor rotates, the blower fan rotates, and this blower fan causes the air in the casing to flow toward the bellmouth opening and also in a direction approaching the output shaft of the motor, but because the upper surface of the inclined wall of the motor body is formed with an enclosing plate portion that extends to surround the output shaft and reaches above the bellmouth opening, the enclosing plate portion prevents water from flowing to the vicinity of the output shaft even when the amount of blowing air is large.

A second invention is characterized in that a plurality of the surrounding plate portions are formed on the upper surface of the inclined wall portion at intervals from one another in the radial direction of the output shaft.

With this configuration, an outer surrounding plate portion and an inner surrounding plate portion are formed based on the radial direction of the output shaft. It is possible that water on the top surface of the motor body may exceed the outer surrounding plate portion, but even if it does exceed the outer surrounding plate portion, the presence of the inner surrounding plate portion prevents the water from flowing near the output shaft.

The third invention is characterized in that the surrounding plate portion has a discontinuous portion in the circumferential direction of the output shaft.

According to this configuration, when water accumulates in a location closer to the output shaft than the surrounding plate portion, the water can be discharged to the outside through the discontinuous portion of the surrounding plate portion .

A fourth aspect of the present invention is characterized in that a protrusion protruding radially outwardly of the output shaft is formed on an edge of the surrounding plate portion in a circumferential direction of the output shaft.

This configuration makes it difficult for water on the top surface of the motor body to flow from the edge of the surrounding plate toward the output shaft. In addition, the protrusions act like ribs on the surrounding plate, preventing deformation of the surrounding plate.

The fifth invention is characterized in that the surrounding plate portion includes an inner surrounding plate portion and an outer surrounding plate portion formed at a distance from the inner surrounding plate portion in the radial direction of the output shaft, and the inner surrounding plate portion and the outer surrounding plate portion each have a discontinuous portion in the circumferential direction of the output shaft, and the discontinuous portion of the inner surrounding plate portion and the discontinuous portion of the outer surrounding plate portion are offset from each other in the circumferential direction of the output shaft.

With this configuration, when water passes over the discontinuous portion of the outer surrounding plate and reaches the inner surrounding plate, the discontinuous portions are offset from each other in the circumferential direction of the output shaft, so the distance it travels to reach the discontinuous portion of the inner surrounding plate is longer. This increases the effect of preventing water from flowing near the output shaft.

A sixth invention is characterized in that an opening through which the output shaft is inserted is formed on the upper surface of the motor body, and the surrounding plate portion is located radially outward from the peripheral portion of the opening on the upper surface of the motor body.

This configuration makes it harder for water that has accumulated on the top surface of the motor body to reach the opening.

A seventh invention is characterized in that it comprises a bell-mouth component member that is provided above and spaced apart from an upper surface of the motor body, the bell-mouth component member extending substantially horizontally and having an annular plate portion in which the bell-mouth opening is formed, and legs that protrude downward from the annular plate portion and are supported radially outward of the output shaft further than the surrounding plate portion on the upper surface of the motor body, and holding portions that hold the legs are provided on the upper surface of the motor body so as to protrude upward.

With this configuration, the retaining portion that holds the legs of the bellmouth component is separated from the bellmouth opening, which prevents the airflow resistance from increasing due to the retaining portion.

According to the first invention, a bellmouth opening is provided which is positioned above the top surface of the motor body, the blower fan is positioned above the bellmouth opening, and a surrounding plate portion which extends to surround the output shaft is formed on the upper surface of the inclined wall portion so as to reach above the bellmouth opening. Therefore, even when the amount of air blown is large, water can be prevented from entering the interior of the motor, and the frequency of motor breakdowns due to water infiltration can be significantly reduced.

According to the second aspect of the invention, multiple surrounding plate portions are formed on the upper surface of the motor body at intervals in the radial direction of the output shaft, which further enhances the effect of preventing water from entering the inside of the motor.

According to the third invention, the surrounding plate portion is discontinuous in the circumferential direction of the output shaft, so if water accumulates closer to the output shaft than the surrounding plate portion, the water can be drained to the outside through the discontinuous portion of the surrounding plate portion.

According to the fourth invention , a protrusion that protrudes radially outward is formed on the edge of the enclosing plate, making it more difficult for water on the upper surface of the motor body to flow from the edge of the enclosing plate toward the output shaft, thereby enhancing the effect of suppressing water penetration into the interior of the motor and also suppressing deformation of the enclosing plate.

According to the fifth invention, the discontinuous portions of the inner enclosing plate portion and the discontinuous portions of the outer enclosing plate portion are offset from each other in the circumferential direction of the output shaft, so that the distance from the discontinuous portions of the outer enclosing plate portion to the discontinuous portions of the inner enclosing plate portion is longer, thereby further enhancing the effect of suppressing water intrusion into the interior of the motor.

According to the sixth aspect of the present invention, since the surrounding plate portion is positioned outside the peripheral edge of the opening through which the output shaft passes, it is possible to prevent water from entering the inside of the motor body through the opening.

According to the seventh invention, when the bellmouth component is provided as a separate member, the retaining portion that holds the legs of the bellmouth component can be separated from the bellmouth opening, thereby suppressing the deterioration of airflow resistance due to the provision of the retaining portion.

1 is a perspective view of a vehicle air-conditioning blower device according to an embodiment of the present invention, as viewed from the rear side of a vehicle. FIG. 2 is a left side view of the vehicle air conditioning blower device. FIG. 2 is a bottom view of the vehicle air-conditioning blower device. 4 is a cross-sectional view taken along line IV-IV in FIG. 1. FIG. 2 is an exploded perspective view showing a blower fan, bell-mouth components, and a motor. FIG. FIG. 13 is a rear view of the motor. This is a view of the motor from the right side. FIG. 1 is a rear view of the motor with the bellmouth components assembled. FIG. 1 is a right-side view of the motor with the bell-mouth components assembled. FIG. 10 is an enlarged view of part A in FIG. 9 . 10 is a cross-sectional view taken along line XII-XII in FIG. 9.

The following describes in detail an embodiment of the present invention with reference to the drawings. Note that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its applications, or its uses.

Figure 1 is a view of a vehicle air conditioning blower 1 according to an embodiment of the present invention, seen from the rear of the vehicle, Figure 2 is a view of the vehicle air conditioning blower 1 seen from the left side, and Figure 3 is a view of the vehicle air conditioning blower 1 seen from below. This vehicle air conditioning blower 1 is disposed, for example, in the passenger compartment of an automobile to blow air for air conditioning, and constitutes a vehicle air conditioning system together with an air conditioning unit and a refrigeration cycle device (not shown). The refrigeration cycle device is a conventionally well-known device that includes a compressor, a condenser, an expansion valve, and an evaporator, and the compressor may be driven by the vehicle engine or an electric motor. The vehicle air conditioning system includes an air conditioning control device (not shown) that controls the vehicle air conditioning blower 1, the refrigeration cycle device, and the air conditioning unit.

The air conditioning unit includes a cooling heat exchanger, for example, an evaporator of a refrigeration cycle, a heating heat exchanger, for example, a heater core, an air mix damper, a blowing direction switching damper, and an air conditioning casing that houses these. The air for air conditioning blown from the vehicle air conditioning blower device 1 is introduced into the air conditioning casing and passes through the cooling heat exchanger and the heating heat exchanger to become air conditioning air at a desired temperature, and is then supplied to each part of the vehicle compartment according to the blowing mode set by the blowing direction switching damper. The temperature of the air conditioning air is adjusted by the amount of air passing through the heating heat exchanger, which is set by the air mix damper. In addition, although not shown, the air conditioning air outlets include, for example, a defrost outlet, a vent outlet, a heat outlet (also called a foot outlet), etc., and are individually opened and closed by the blowing direction switching damper to switch the blowing mode. In general, the defrost outlet opens upward, and the heat outlet opens downward. The defroster outlet is an opening for supplying conditioned air to the inner surface of the windshield. The heat outlet is an opening for supplying conditioned air mainly to the area near the feet of the passengers, and can be formed at the end of the heat duct.

In this embodiment, the front side of the vehicle is simply referred to as "front", the rear side of the vehicle is simply referred to as "rear", the left side of the vehicle is simply referred to as "left", and the right side of the vehicle is simply referred to as "right", but this is merely a definition for the convenience of explanation and does not limit the actual usage, installation, or assembly state.

Although not shown, the vehicle air conditioning blower 1 is housed together with the air conditioning unit inside an instrument panel provided at the front end of the passenger compartment. The air conditioning unit is located approximately in the center in the left-right direction inside the instrument panel, while the vehicle air conditioning blower 1 is located inside the instrument panel on the passenger side of the air conditioning unit (left side in the case of a right-hand drive vehicle, right side in the case of a left-hand drive vehicle). In this embodiment, the vehicle air conditioning blower 1 is located on the right side of the vehicle, but if it is located on the left side of the vehicle, the structure of this embodiment can be symmetrical, so detailed description will be omitted. In addition, the installation position of the vehicle air conditioning blower 1 is not particularly limited, and can be set appropriately according to the layout requirements of the vehicle.

(Vehicle configuration)
The vehicle in which this vehicle air-conditioning blower device 1 is installed is provided with a dash panel (partition member) (not shown) for separating an engine room from a passenger compartment. The engine room is provided at the front of the vehicle, and an engine, a transmission, etc. are disposed therein. The dash panel extends substantially in the vertical direction. A cowl extending in the horizontal direction is disposed on the upper part of the dash panel. A communication port that communicates with the outside of the passenger compartment is formed in the cowl. Since the cowl is disposed outside the passenger compartment, rainwater, water from a car wash, snow, etc. may enter the cowl.

(Configuration of vehicle air-conditioning blower device 1)
1 to 4, the vehicle air-conditioning blower device 1 includes a blower casing 2, a blower fan 3, a motor 5 for driving the blower fan 3 to rotate, a first inside/outside air switching damper 6, a second inside/outside air switching damper 7, an air filter 8, and an inside/outside air switching actuator 9 (shown in FIGS. 1 and 2). The blower fan 3, the first inside/outside air switching damper 6 and the second inside/outside air switching damper 7, and the air filter 8 are housed in the blower casing 2.

The upper side of the blower casing 2 is formed with a front internal air inlet 2a and a rear internal air inlet 2b as shown in FIG. 2 and an external air inlet 2c as shown in FIG. 4. As shown in FIG. 2, the front internal air inlet 2a is formed in a position on the upper side of the blower casing 2 that is closer to the front than the center in the front-to-rear direction and opens into the vehicle cabin. The rear internal air inlet 2b is formed in a position on the upper side of the blower casing 2 that is closer to the rear than the center in the front-to-rear direction and opens into the vehicle cabin. Air from the front internal air inlet 2a and the rear internal air inlet 2 can be introduced into the interior of the blower casing 2.

As shown in FIG. 4, an outside air intake duct section 2d is integrally formed with the upper side of the blower casing 2 so as to bulge upward from the portion between the front inside air intake port 2a and the rear inside air intake port 2b. The upper side of the outside air intake duct section 2d extends forward. An outside air intake port 2c opens at the front end of the outside air intake duct section 2d. The outside air intake duct section 2d is connected to the cowl, and the outside air intake port 2c communicates with the outside of the vehicle cabin via the cowl and is open to the outside of the vehicle cabin. It is possible to introduce air outside the vehicle cabin (outside air) into the inside of the blower casing 2 from the outside air intake port 2c.

As shown in FIG. 4, the filter 8 is housed inside the air casing 2 below the front inside air inlet 2a, the rear inside air inlet 2b, and the outside air inlet 2c. The filter 8 is formed in a plate shape and is arranged to extend horizontally. The peripheral edge of the filter 8 is supported by a filter support part 2e provided inside the air casing 2. A filter insertion hole 2f is formed in the rear wall part of the air casing 2 for inserting the filter 8 into the air casing 2. The filter insertion hole 2f is closed by a lid part 8a provided at the rear end part of the filter 8. The filter 8 can be made of, for example, a general nonwoven fabric.

A partition wall 2g is provided inside the air blower casing 2 above the filter 8. The partition wall 2g extends in the vertical direction and is slightly inclined so that it is positioned further back as it approaches the lower end. At the top inside the air blower casing 2, a first air passage R1 is formed in front of the partition wall 2g, and a second air passage R2 is formed behind the partition wall 2g. The front-to-rear width of the first air passage R1 is set wider than the front-to-rear width of the second air passage R2, and the cross-sectional area of the first air passage R1 is wider than the cross-sectional area of the second air passage R2.

The upstream end (top end) of the first air passage R1 is connected to the front inside air inlet 2a and the outside air inlet 2c. The upstream end (top end) of the second air passage R2 is connected to the rear inside air inlet 2b and the outside air inlet 2c. The first air passage R1 and the second air passage R2 are connected to a common outside air inlet 2c, but the inside air inlets are connected to different inside air inlets 2a, 2b. This results in a structure that allows inside air and outside air to be introduced into both the first air passage R1 and the second air passage R2.

The first inside/outside air switching damper 6 is disposed inside the blower casing 2, forward of the partition wall 2g, and includes a blocking plate 6a, a shaft 6b, and an end plate 6c. The blocking plate 6a extends in the left-right direction. The shaft 6b also extends in the left-right direction, and is supported rotatably on both left and right side walls of the blower casing 2. The end plate 6c is provided near both ends of the shaft 6b in the left-right direction. The end plate 6c extends radially from the shaft 6b and is connected to both left and right ends of the blocking plate 6a. The blocking plate 6a, the shaft 6b, and the end plate 6c are integrally molded. The first inside/outside air switching damper 6 rotates around the center line of the shaft 6b, and is switched between a state rotated forward as shown in FIG. 4 and a state rotated backward (not shown). When the first inside/outside air switching damper 6 is rotated forward, it closes the front inside air inlet 2a and opens the outside air inlet 2c, blocking the inflow of inside air and allowing the outside air to be introduced into the upstream part of the first air passage R1. On the other hand, when the first inside/outside air switching damper 6 is rotated backward, it opens the front inside air inlet 2a and closes the outside air inlet 2c, blocking the inflow of outside air and allowing the inside air to be introduced into the upstream part of the first air passage R1.

The second inside/outside air switching damper 7 is disposed inside the blower casing 2 behind the partition wall 2g, and like the first inside/outside air switching damper 6, has a blocking plate 7a, an axis 7b, and an end plate 7c. The second inside/outside air switching damper 7 rotates around the center line of the axis 7b, and is switched between a state rotated toward the rear as shown in FIG. 4 and a state rotated toward the front (not shown). When the second inside/outside air switching damper 7 rotates toward the rear, it closes the rear inside air inlet 2b and opens the outside air inlet 2c, blocking the inflow of inside air and introducing outside air into the upstream part of the second air passage R2. On the other hand, when the second inside/outside air switching damper 7 rotates toward the front, it opens the rear inside air inlet 2b and closes the outside air inlet 2c, blocking the inflow of outside air and introducing inside air into the upstream part of the second air passage R2.

The first inside/outside air switching damper 6 and the second inside/outside air switching damper 7 are driven by an inside/outside air switching actuator 9 shown in FIG. 1 and FIG. 2. The inside/outside air switching actuator 9 is controlled by an air conditioning control device (not shown). A link member 9a is engaged with the shaft portion 6b of the first inside/outside air switching damper 6 and the shaft portion 7b of the second inside/outside air switching damper 7, and the first inside/outside air switching damper 6 and the second inside/outside air switching damper 7 can be linked by rotating the link member 9a by the inside/outside air switching actuator 9. A conventionally known method can be used for the link structure of the first inside/outside air switching damper 6 and the second inside/outside air switching damper 7 using the link member 9a, so a detailed description will be omitted. In addition, the first inside/outside air switching damper 6 and the second inside/outside air switching damper 7 may be driven separately without using the link member 9a.

In this embodiment, the first inside/outside air switching damper 6 and the second inside/outside air switching damper 7 are driven as follows. That is, as shown in FIG. 4, the mode can be switched to any one of three modes: an outside air introduction mode in which the first inside/outside air switching damper 6 is rotated forward and the second inside/outside air switching damper 7 is rotated rearward; an inside air circulation mode in which the first inside/outside air switching damper 6 is rotated rearward and the second inside/outside air switching damper 7 is rotated forward; and an inside/outside air two-layer flow mode in which the first inside/outside air switching damper 6 is rotated forward and the second inside/outside air switching damper 7 is rotated forward.

In the outside air introduction mode, the first inside/outside air switching damper 6 rotates forward and the second inside/outside air switching damper 7 rotates rearward, so that only outside air is introduced into the first air passage R1 and the second air passage R2. Therefore, the outside air introduction mode of this embodiment can also be called an all outside air mode in which all air introduced into the blower casing 2 is outside air. On the other hand, in the inside air circulation mode, the first inside/outside air switching damper 6 rotates rearward and the second inside/outside air switching damper 7 rotates forward, so that only inside air is introduced into the first air passage R1 and the second air passage R2. Therefore, the inside air circulation mode of this embodiment can also be called an all inside air mode in which all air introduced into the blower casing 2 is inside air.

In the inside/outside air two-layer flow mode, the first inside/outside air switching damper 6 rotates forward and the second inside/outside air switching damper 7 rotates forward, so that outside air is introduced into the first air passage R1 and inside air is introduced into the second air passage R2. The inside/outside air two-layer flow mode is a mode used during heating, in which outside air and inside air are introduced into the air casing 2 at the same time, and it can also be simply called the two-layer mode.

Switching between the inside air recirculation mode, outside air introduction mode, and inside/outside two-layer air flow mode is performed by conventionally known automatic air conditioner control. By switching to the inside/outside two-layer air flow mode, it is possible to supply relatively dry outside air to the defroster outlet in winter to effectively clear fog from the front windshield, while supplying relatively warm inside air to the heat outlet to improve heating efficiency. This makes it possible to achieve both improved heating capacity and improved anti-fogging properties.

Below the inside air inlets 2a, 2b and the outside air inlet 2c of the blower casing 2, a scroll casing 20 is provided in which the blower fan 3 is housed. As shown in Figs. 1 and 2, the scroll casing 20 is divided into an upper scroll casing member 21 in which the upper-layer blower fan 30 is housed, a lower scroll casing member 22 in which the lower-layer blower fan 31 is housed, and a bottom wall member 23. As shown in Fig. 4, a partition plate 24 is disposed in the vertical middle part of the inside of the scroll casing 20 to divide the inside of the scroll casing 20 into a first air passage R1 and a second air passage R2. The inside of the scroll casing 20 is divided into upper and lower parts by the partition plate 24, and the first air passage R1 is formed above the partition plate 24, and the second air passage R2 is formed below the partition plate 24. Therefore, the first air passage R1, which is located above the partition plate 24, can be called the upper air passage, and the second air passage R2, which is located below the partition plate 24, can be called the lower air passage.

The upper scroll casing member 21 and the lower scroll casing member 22 are integrated by fitting the lower part of the upper scroll casing member 21 and the upper part of the lower scroll casing member 22 together. In addition, the lower scroll casing member 22 and the bottom wall member 23 are integrated by fitting the lower scroll casing member 22 and the bottom wall member 23 together.

As shown in FIG. 5, the blower fan 3 includes an upper-layer blower fan 30 and a lower-layer blower fan 31. The upper-layer blower fan 30 and the lower-layer blower fan 31 are integrated and rotated by a common motor 5. As shown in FIG. 4, the upper-layer blower fan 30 is disposed in the first air passage R1 with its rotation center line extending vertically. The lower-layer blower fan 31 is disposed in the second air passage R2 with its rotation center line extending vertically. The upper-layer blower fan 30 and the lower-layer blower fan 31 may be integrally formed, or may be combined as separate members.

A substantially circular first bellmouth opening (upper bellmouth opening) 21a is formed in the upper wall of the upper scroll casing member 21 so as to open inside the blower casing 2. The first bellmouth opening 21a is disposed so as to face the underside of the filter 8. The upper-layer blower fan 30 is located directly below the first bellmouth opening 21a, and therefore the first bellmouth opening 21a also faces the upper side of the upper-layer blower fan 30. The upper side of the upper-layer blower fan 30 is the air intake side, and air is sucked in from the upper side of the upper-layer blower fan 30.

The upper wall of the upper scroll casing member 21 is provided with a protruding wall portion 21b that protrudes upward. This protruding wall portion 21b is positioned behind the opening edge of the first bellmouth opening 21a and extends in the left-right direction. The upper end of the protruding wall portion 21b reaches near the lower end of the partition wall portion 2g. The protruding wall portion 21b and the partition wall portion 2g partition the upper side of the upper scroll casing member 21 inside the blower casing 2 in the front-rear direction, and the upstream side of the first air passage R1 is formed in front of the protruding wall portion 21b and the partition wall portion 2g, and the upstream side of the second air passage R2 is formed behind the protruding wall portion 21b and the partition wall portion 2g. The protruding wall portion 21b can be formed to penetrate the filter 8 and can protrude upward from the upper surface of the filter 8.

The first air passage R1 communicates with the interior of the upper scroll casing member 21 via the first bellmouth opening 21a, and the interior of this upper scroll casing member 21 forms part (the downstream portion) of the first air passage R1. The portion above the partition plate 24 forms the downstream portion of the first air passage R1. The upper layer blowing fan 30 is disposed in the first air passage R1 inside the upper scroll casing member 21. When the upper layer blowing fan 30 rotates inside the upper scroll casing member 21, the upper layer blowing fan 30 blows air in the first air passage R1 as air for air conditioning. In other words, the upper layer blowing fan 30 is a member for forming an air flow in the upper layer.

As shown in FIG. 4, the partition plate 24 has a through hole 24a formed therein, through which the upper-level blowing fan 30 is inserted from the second air passage R2 toward the first air passage R1. The diameter of the through hole 24a is larger than the outer diameter of the upper-level blowing fan 30. This makes it possible to easily insert the upper-level blowing fan 30 into the through hole 24a.

As shown in FIG. 2, an upper air outlet 21c connected to the air conditioning unit is formed on the front side of the left wall of the upper scroll casing member 21. The downstream end of the first air passage R1 is connected to the upper air outlet 21c, and the air in the first air passage R1 is blown out of the upper scroll casing member 21 from the upper air outlet 21c.

As shown in FIG. 4, the second air passage R2 extends downward along the rear side of the interior of the upper scroll casing member 21, and the lower portion of the second air passage R2 reaches the bottom wall member 23. The lower wall portion of the lower scroll casing member 22 is spaced upward from the bottom wall member 23, and the lower portion of the second air passage R2 is located between the lower wall portion of the lower scroll casing member 22 and the bottom wall member 23.

As shown in Figures 4 and 5, a bellmouth component 60 is provided inside the scroll casing 20. This bellmouth component 60 is a component that constitutes the vehicle air conditioning blower device 1, and is constructed as a separate component from the scroll casing 20 and the motor 5. The material of the bellmouth component 60 can be a resin material.

The bellmouth component 60 has a bellmouth plate portion (annular plate portion) 61 that extends substantially horizontally, and multiple legs 62. The bellmouth plate portion 61 and the legs 62 can be molded as a single unit, or they can be combined after being molded from separate members.

A second bellmouth opening (the bellmouth opening of the present invention) 61a is formed in the bellmouth plate portion 61. The bellmouth plate portion 61 is supported by the legs 62, and is therefore provided at a distance upward from the upper surface of the motor body 5a of the motor 5. Therefore, the second bellmouth opening 61a is positioned at a distance upward from the upper surface of the motor body 5a, and is positioned so as to face the underside of the blower fan 3.

The second bellmouth opening 61a is substantially circular and is arranged so as to be concentric with the first bellmouth opening 21a in a plan view. The diameter of the second bellmouth opening 61a can be larger than the diameter of the first bellmouth opening 21a. Because the bellmouth plate portion 61 has the second bellmouth opening 61a, the inner edge of the bellmouth plate portion 61 is formed so as to be substantially circular. The outer edge of the bellmouth plate portion 61 is also formed so as to be substantially circular. The bellmouth plate portion 61 is formed in an annular shape as a whole, and the width of the bellmouth plate portion 61 is set to be substantially the same throughout the entire circumferential direction of the bellmouth plate portion 61.

The inner circumferential side of the bellmouth plate portion 61 is curved so that it is positioned higher as it approaches the second bellmouth opening 61a. The outer circumferential side of the curved portion of the bellmouth plate portion 61 is flat, and in this flat portion, multiple bellmouth drainage holes 61b (shown in FIG. 5) are formed at intervals in the circumferential direction. That is, on the outer circumferential side of the second bellmouth opening 61a of the bellmouth plate portion 61, bellmouth drainage holes 61b are formed to drain water from the upper surface of the bellmouth plate portion 61 downward of the bellmouth plate portion 61, and the formation of these bellmouth drainage holes 61b prevents water from remaining pooled on the upper surface of the bellmouth plate portion 61. Water dripping downward from the bellmouth drainage holes 61b flows into the drain passage D described later and is drained to the outside of the vehicle compartment from a drain portion provided in the air conditioning unit.

The bellmouth drainage holes 61b can be formed at equal intervals in the circumferential direction of the bellmouth plate portion 61, i.e., in the circumferential direction of the blower fan 3, but they may also be formed at unequal intervals. In addition, the number of bellmouth drainage holes 61b is three in this embodiment, but it may be one or two, or four or more. The bellmouth drainage holes 61b may be circular, elliptical, slit-shaped, rectangular, etc.

The legs 62 protrude downward from the periphery of the opening of the bellmouth drainage holes 61b on the underside of the bellmouth plate portion 61, and are portions for supporting the bellmouth plate portion 61 from below. Since the legs 62 extend from the periphery of the opening of each bellmouth drainage hole 61b, three legs are provided in this embodiment. The number of legs 62 and the number of bellmouth drainage holes 61b do not have to match, and one may be greater than the other.

As shown in FIG. 12, the leg 62 has a concave cross section that opens radially inward of the blower fan 3. This makes it difficult for air flowing from the outside to the inside of the blower fan 3 when the blower fan 3 rotates to flow inward of the leg 62, so the leg 62 acts as a wind shield that prevents wind from reaching the periphery of the opening of the bellmouth drainage hole 61b.

The lower end of the leg 62 is supported radially outward of the output shaft 5b rather than the surrounding plate portions 55-57 (described in detail later) on the upper surface of the motor body 5a. In this embodiment, the bottom surface of the scroll casing 20 is formed by the upper surface of the cover portion 50 (described later) of the motor body 5a, so the lower end of the leg 62 comes into contact with the outer periphery of the cover portion 50 from above. Thus, the bellmouth component 60 is supported by the cover portion 50, and the height of the second bellmouth opening 61a is determined to the desired height.

The lower part of the second air passage R2 is connected to the inside of the lower scroll casing member 22 via the second bellmouth opening 61a, and the inside of the lower scroll casing member 22 is a part (downstream part) of the second air passage R2. The part below the partition plate 24 is the downstream part of the second air passage R2. The lower layer blowing fan 31 is disposed in the downstream part of the second air passage R2 inside the lower scroll casing member 22. When the lower layer blowing fan 31 rotates, the lower layer blowing fan 31 blows air in the second air passage R2 as air for air conditioning. In other words, the lower layer blowing fan 31 is a member for forming an air flow in the lower layer.

As shown in FIG. 2, a lower air outlet 22c connected to the air conditioning unit is formed on the front side of the left wall of the lower scroll casing member 22. The lower air outlet 22c is located directly below the upper air outlet 21c. The downstream end of the second air passage R2 is connected to the lower air outlet 22c, and the air in the second air passage R2 is blown out of the lower scroll casing member 22 from the lower air outlet 22c.

The bottom wall member 23 is a cover-like member formed to cover the lower end of the lower scroll casing member 22. The peripheral edge of the bottom wall member 23 is formed to fit into the peripheral edge of the lower end of the lower scroll casing member 22, so that air does not leak between the peripheral edge of the bottom wall member 23 and the peripheral edge of the lower end of the lower scroll casing member 22.

A lower end opening 23a is formed in the bottom wall member 23. The motor body 5a of the motor 5 is configured to fit into the lower end opening 23a, and is fastened to the bottom wall member 23 by a fastening member with the motor body 5a fitted into the lower end opening 23a from below.

The motor 5 has a motor body 5a fixed to the bottom wall member 23, which is the lower part of the air blower casing 2, as well as an output shaft 5b protruding upward from the motor body 5a. The motor body 5a has an internal mechanism that incorporates a rotor, etc., and a cover part 50 that covers this internal mechanism from above. The upper surface of the motor body 5a is formed by the upper surface of the cover part 50. An opening 50a through which the output shaft 5b is inserted is formed in the center of the cover part 50 so as to penetrate the cover part 50 in the vertical direction, and therefore the opening 50a opens into the upper surface of the motor body 5a.

The output shaft 5b is inserted through the opening 50a of the cover 50 and protrudes upward from the upper surface of the motor body 5a, and is arranged concentrically with the first bellmouth opening 21a and the second bellmouth opening 61a. The upper end of the output shaft 5b is located above the second bellmouth opening 61a. The blower fan 3 is fixed to the upper side of the output shaft 5b, and the blower fan 3 and the output shaft 5b rotate together. Therefore, when a voltage is applied to the motor body 5a, the rotational force of the output shaft 5b is transmitted to the blower fan 3, and the upper blower fan 30 rotates in the first air passage R1 and the lower blower fan 31 rotates in the second air passage R2. An air conditioning control device (not shown) is connected to the motor body 5a, and a voltage is applied by the air conditioning control device to achieve the desired rotation speed.

4 and 5, the cover portion 50 has an outer peripheral wall portion 51 extending in the vertical direction, a horizontal wall portion 52 extending from the upper end of the outer peripheral wall portion 51 radially inward of the output shaft 5b, an inner peripheral wall portion 53 extending upward from the inner end of the horizontal wall portion 52, and an inclined wall portion 54 formed so as to be positioned higher as it approaches the output shaft 5b from the upper end of the inner peripheral wall portion 53 radially inward of the output shaft 5b. The radial outer end of the outer peripheral wall portion 51 is a portion that fits into the inner peripheral surface of the lower end opening 23a of the bottom wall member 23. The inner peripheral wall portion 53 and the inclined wall portion 54 are portions formed to correspond to the shape of the internal mechanism of the motor main body 5a. In addition, due to the formation of the inclined wall portion 54, the upper surface of the motor main body 5a is shaped to be positioned higher as it approaches the output shaft 5b. Furthermore, the outer peripheral wall portion 51, the horizontal wall portion 52, the inner peripheral wall portion 53, and the inclined wall portion 54 are continuous in the circumferential direction of the output shaft 5b and are integrally molded, for example, from a resin material.

A lower surrounding plate portion 55, an outer surrounding plate portion 56, and an inner surrounding plate portion 57 are formed on the upper surface of the cover portion 50. The lower surrounding plate portion 55, the outer surrounding plate portion 56, and the inner surrounding plate portion 57 are integrally molded with the inclined wall portion 54.

The lower surrounding plate portion 55 protrudes upward from the outer peripheral portion of the inclined wall portion 54 and extends to surround the output shaft 5b. The upper end of the lower surrounding plate portion 55 is located below the second bellmouth opening 61a and the bellmouth plate portion 61. The lower surrounding plate portion 55 has a plurality of slits 55a that are continuous from the upper end to the lower end and spaced apart from each other in the circumferential direction of the output shaft 5b. The formation of these slits 55a provides the lower surrounding plate portion 55 with a portion that is discontinuous in the circumferential direction of the output shaft 5b (discontinuous portion). The lower surrounding plate portion 55 may be continuous in the circumferential direction.

From the inward portion of the inclined wall portion 54, an outer surrounding plate portion 56 that extends to surround the output shaft 5b protrudes upward. The outer surrounding plate portion 56 is formed to reach above the second bellmouth opening 61a. The outer surrounding plate portion 56 has a plurality of slits 56a that are continuous from the upper end to the lower end and are formed at intervals in the circumferential direction of the output shaft 5b. By forming these slits 56a, the outer surrounding plate portion 56 has a portion that is discontinuous in the circumferential direction of the output shaft 5b (discontinuous portion). The outer surrounding plate portion 56 may be continuous in the circumferential direction.

From the portion of the inclined wall 54 that is more inward than the outer surrounding plate 56, an inner surrounding plate 57 extends upward and surrounds the output shaft 5b. The outer surrounding plate 56 and the inner surrounding plate 57 are formed on the upper surface of the motor body 5a with a gap between them in the radial direction of the output shaft 5b. The inner surrounding plate 57 is formed to reach above the second bellmouth opening 61a. The upper end of the inner surrounding plate 57 is located above the upper end of the outer surrounding plate 56.

The inner surrounding plate portion 57 has a plurality of slits 57a that are continuous from the upper end to the lower end and are spaced apart from one another in the circumferential direction of the output shaft 5b. The formation of these slits 57a provides the inner surrounding plate portion 57 with a portion that is discontinuous in the circumferential direction of the output shaft 5b (discontinuous portion). The inner surrounding plate portion 57 may be continuous in the circumferential direction.

The discontinuous portion of the inner surrounding plate portion 57 and the discontinuous portion of the outer surrounding plate portion 56 are offset from each other in the circumferential direction of the output shaft 5b. That is, the formation position of the slit 57a of the inner surrounding plate portion 57 and the formation position of the slit 56a of the inner surrounding plate portion 57 are different from each other when the circumferential direction of the output shaft 5b is used as a reference, and the formation positions of both slits 56a, 57a are set so that the slit 57a of the inner surrounding plate portion 57 and the slit 56a of the outer surrounding plate portion 56 do not overlap each other when viewed from the side. In addition, the inner surrounding plate portion 57 and the inner surrounding plate portion 57 are located radially outward from the peripheral portion of the opening 50a on the upper surface of the motor body 5a.

At the end of the slit 57a in the inner surrounding plate 57 (the circumferential edge of the output shaft 5b), a protrusion 57b is formed that protrudes radially outward from the output shaft 5b. The protrusion 57b is shaped like a rib that extends continuously from the upper edge to the lower edge of the slit 57a and is connected to the upper surface of the inclined wall 54. The formation of this protrusion 57b improves the rigidity of the inner surrounding plate 57, making it possible to suppress deformation of the inner surrounding plate 57.

On the upper surface of the cover part 50, an outer holding part 52a and an inner holding part 52b that hold the leg part 62 of the bellmouth component 60 are provided so as to protrude upward. As shown in Figures 11 and 12, a protrusion 62a that protrudes radially outward is formed on the lower part of the leg part 62. The outer holding part 52a is a part that holds the leg part 62 from the radially outward side, and has an engagement hole 52c with which the protrusion part 62a engages. The inner holding part 52b is a part that holds the leg part 62 from the radially inward side. As a result, the leg part 62 is held from both radial sides by the outer holding part 52a and the inner holding part 52b, and the bellmouth component 60 is positioned relative to the cover part 50.

(Configuration of blower fan 3)
As shown in Fig. 4, the blower fan 3 is disposed above the second bellmouth opening 61a, and includes a fixed part 33 fixed to the output shaft 5b of the motor 5, a cone part 34 extending from the fixed part 33 in the radial direction of the rotating shaft 5c, an upper layer blower fan 30 consisting of a number of upper blades fixed to the radial outside of the cone part 34, and a lower layer blower fan 31 consisting of a number of lower blades fixed to the radial outside of the cone part 34. The fixed part 33, the cone part 34, the upper blades and the lower blades can be integrally molded from a resin material, or can be formed by combining separate members. The blower fan 3 is a centrifugal fan.

The fixed part 33 is formed in a cylindrical shape into which the output shaft 5b of the motor 5 is inserted. The means for fixing the fixed part 33 to the output shaft 5b of the motor 5 has traditionally been peripheral, so a detailed explanation will be omitted.

(Cooling structure of motor 5)
The scroll casing 20 is provided with a cooling structure for the motor 5. That is, as shown by the dashed lines in Figures 1 and 2, a cooling air passage S for supplying cooling air to the motor 5 is formed so as to extend in the vertical direction on the left side of the scroll casing 20. An upper portion of the cooling air passage S is an upstream portion, and extends above the partition plate 24. The upstream end of the cooling air passage S communicates with the first air passage R1.

The upper scroll casing member 21 has an upper concave portion 21e on the left side thereof, which is recessed upward and open downward. The internal space of this upper concave portion 21e constitutes the upstream portion of the cooling air passage S. The lower scroll casing member 22 has a cylindrical portion 22e on the left side thereof, which extends in the vertical direction and is located directly below the upper concave portion 21e. The cylindrical portion 22e has open upper and lower ends. The upper end of the cylindrical portion 22e is connected to the lower end of the upper concave portion 21e, and the internal space of the upper concave portion 21e and the internal space of the cylindrical portion 22e are connected to each other. The vertical middle portion of the cooling air passage S is constituted by the internal space of the cylindrical portion 22e.

A lower concave portion 23e is provided on the left side of the bottom wall member 23, which is recessed downward and opens upward. This lower concave portion 23e is formed to be located directly below the cylindrical portion 22e, and the lower end of the cylindrical portion 22e is connected to the upper end of the lower concave portion 23e, so that the internal space of the cylindrical portion 22e and the internal space of the lower concave portion 23e are in communication. The lower portion of the cooling air passage S is formed by the internal space of the lower concave portion 23e.

A bulge 23f that bulges out toward the rear is formed in the lower portion of the left side of the bottom wall member 23. The bulge 23f is open downward. The internal space of the bulge 23f is connected to the internal space of the lower concave portion 23e, and the internal space of the bulge 23f forms the lower end (downstream end) of the cooling air passage S. In other words, the cooling air passage S is formed by the internal space of the upper concave portion 21e, the internal space of the cylindrical portion 22e, the internal space of the lower concave portion 23e, and the internal space of the bulge 23f, and is a long passage in the vertical direction, the lower end of which is bent backward and open downward.

A cooling air intake port (not shown) for taking in cooling air to the motor 5 is formed in the portion of the motor body 5a located directly below the bulge 23f. The cooling air intake port is connected to the internal space of the bulge 23f, i.e., the lower end of the cooling air passage S. Therefore, air from the first air passage R1 flows through the cooling air passage S and is taken into the motor 5 through the cooling air intake port.

(Configuration of the drain passage D)
As shown in Fig. 4, a drain passage D is formed in the lower portion of the scroll casing 20. The drain passage D is formed in the bottom wall member 23 and is located below the second air passage R2. The downstream end of the drain passage D is connected to the air conditioning unit, and water in the drain passage D flows into the air conditioning unit and is drained to the outside of the vehicle cabin through a drain portion provided in the air conditioning unit. The drain portion provided in the air conditioning unit is a portion for draining condensed water generated on the surface of the cooling heat exchanger, and is a conventionally well-known portion. A drain hose or the like extending to the outside of the vehicle cabin is connected to this drain portion, although not shown.

(Effects of the embodiment)
As described above, according to the vehicle air-conditioning blower device 1 of this embodiment, when the inside/outside air switching dampers 6 and 7 are operated to open the inside air inlets 2a and 2b and close the outside air inlet 2c, the vehicle enters an inside air circulation mode in which inside air is introduced from the inside air inlets 2a and 2b. In the inside air circulation mode, the upper-layer blowing fan 30 and the lower-layer blowing fan 31 rotate, so that the inside air introduced from the inside air inlets 2a and 2b flows through the first air passage R1 and the second air passage R2 and is blown as air for air conditioning. In addition, when the inside/outside air switching dampers 6 and 7 are operated to close the inside air inlets 2a and 2b and open the outside air inlet 2c, the vehicle enters an outside air introduction mode in which outside air is introduced from the outside air inlet 2c. In the outside air introduction mode, the first air passage R1 and the second air passage R2 rotate, and the outside air introduced from the outside air inlet 2c flows through the first air passage R1 and the second air passage R2 and is blown as air for air conditioning. Furthermore, when the inside/outside air switching dampers 6 and 7 operate to open the inside air inlets 2a, 2b and the outside air inlet 2c, the system enters the inside/outside air two-layer flow mode, and the upper layer blowing fan 30 and the lower layer blowing fan 31 rotate to blow both airs as air for air conditioning.

In the outside air introduction mode and inside/outside air two-layer flow mode, the outside air inlet 2c is opened by the inside/outside air switching dampers 6 and 7, so rainwater or water from washing the car may enter the first air passage R1 of the air blower casing 2 from the outside air inlet 2c. The water that has entered the first air passage R1 may accumulate on the upper surface of the motor body 5a located at the bottom of the air blower casing 2, that is, on the upper surface of the cover part 50. When the motor 5 rotates, the air blower fan 3 rotates, and the air in the air blower casing 2 may flow toward the second bellmouth opening 61a and in a direction approaching the output shaft 5b of the motor 5. However, the surrounding plate parts 56 and 57 that extend to surround the output shaft 5b are formed on the upper surface of the motor body 5a so as to reach above the second bellmouth opening 61a, so that even when the amount of air blown is large, the water is prevented from flowing to the vicinity of the output shaft 5b. This prevents water from entering the motor 5, significantly reducing the frequency of failures caused by water ingress into the motor 5.

In addition, the multiple surrounding plate sections 55-57 are formed on the top surface of the motor body 5a with intervals between each other in the radial direction of the output shaft 5b, which further enhances the effect of preventing water from entering the inside of the motor 5.

In addition, because the surrounding plate portions 55-57 are discontinuous in the circumferential direction of the output shaft 5b, if water accumulates nearer to the output shaft 5b than the lower surrounding plate portion 55, or nearer to the output shaft 5b than the outer surrounding plate portion 56, the water can be discharged to the outside through the discontinuous portions of the surrounding plate portions 55, 56.

In addition, because the upper surface of the motor body 5a is located higher as it approaches the output shaft 5b, water that has accumulated on the upper surface of the motor body 5a is less likely to flow in a direction approaching the output shaft 5b, which further enhances the effect of preventing water from entering the interior of the motor 5.

In addition, a protrusion 57b that protrudes radially outward is formed on the edge of the inner enclosing plate 57, making it difficult for water on the upper surface of the motor body 5a to flow from the edge of the inner enclosing plate 57 toward the output shaft 5b, thereby improving the effect of suppressing water infiltration into the inside of the motor 5. It is also possible to suppress deformation of the inner enclosing plate 57. Note that a similar protrusion may be provided on the outer enclosing plate 56 or the lower enclosing plate 55.

In addition, since the discontinuous portion of the inner enclosing plate portion 57 and the discontinuous portion of the outer enclosing plate portion 56 are offset from each other in the circumferential direction of the output shaft 5b, the distance from the discontinuous portion of the outer enclosing plate portion 56 to the discontinuous portion of the inner enclosing plate portion 57 is longer, thereby further enhancing the effect of preventing water from entering the inside of the motor 5.

In addition, because the surrounding plate portions 55-57 are positioned outside the periphery of the opening 50a through which the output shaft 5b passes, it is possible to prevent water from entering the inside of the motor body 5a through the opening 50a.

Furthermore, when the bellmouth component 60 is provided as a separate component, the retaining portions 52a, 52b that hold the legs 62 of the bellmouth component 60 can be separated from the second bellmouth opening 61a, thereby suppressing the deterioration of airflow resistance caused by providing the retaining portions 52a, 52b.

The above-described embodiment is merely illustrative in all respects and should not be interpreted as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. For example, the present invention can be applied to a vehicle air conditioning blower that is not structured to switch to a two-layer air flow mode.

As described above, the vehicle air conditioning blower device according to the present invention can be used, for example, as a blower unit for a vehicle air conditioning device.

REFERENCE SIGNS LIST 1 Vehicle air conditioning blower device 2 Blower casing 2a, 2b Inside air inlet 2c Outside air inlet 5 Motor 5a Motor body 5b Output shaft 6 First inside/outside air switching damper 7 Second inside/outside air switching damper 20 Scroll casing 30 Upper-layer blower fan 31 Lower-layer blower fan 50a Openings 52a, 52b Holding portion 56 Outer surrounding plate portion 56a Slit (discontinuous portion)
57 Inner surrounding plate portion 57a Slit (discontinuous portion)
57b: Protrusion 60: Bellmouth component 61: Bellmouth plate portion (annular plate portion)
61a Second bellmouth opening (bellmouth opening)
62 Leg R1 First air passage (upper air passage)
R2 Second air passage (lower air passage)

Claims (6)

a casing having an outside air inlet for introducing air outside the vehicle cabin, the outside air inlet being formed so as to be open to the outside of the vehicle cabin;
a motor having a motor body fixed to a lower portion of the casing and an output shaft protruding upward from the motor body;
a blower fan disposed inside the casing and spaced above the motor body and connected to the output shaft,
A bell-mouth opening is provided inside the casing and is disposed above and away from an upper surface of the motor body,
The blower fan is disposed above the bell-mouth opening,
The motor body has a cover portion that covers the rotor from above,
The cover portion has an inclined wall portion that is inclined so as to be positioned higher as it approaches the output shaft,
a plurality of surrounding plate portions extending to surround the output shaft are integrally formed on an upper surface of the inclined wall portion so as to reach above the bellmouth opening and to be spaced apart from one another in the radial direction of the output shaft . The vehicle air conditioning blower device according to claim 1 ,
The vehicle air-conditioning blower device, wherein the surrounding plate portion is provided with a discontinuous portion in a circumferential direction of the output shaft. The vehicle air-conditioning blower device according to claim 1 or 2 ,
a projection projecting radially outward from the output shaft on an edge of the surrounding plate in a circumferential direction of the output shaft; The vehicle air conditioning blower device according to claim 1 ,
The surrounding plate portion includes an inner surrounding plate portion and an outer surrounding plate portion formed at a distance from the inner surrounding plate portion in the radial direction of the output shaft,
The inner surrounding plate portion and the outer surrounding plate portion each have a discontinuous portion in a circumferential direction of the output shaft,
The vehicle air-conditioning blower device, wherein the discontinuous portion of the inner enclosing plate portion and the discontinuous portion of the outer enclosing plate portion are offset from each other in a circumferential direction of the output shaft. The vehicle air-conditioning blower device according to any one of claims 1 to 4 ,
An opening through which the output shaft is inserted is provided on an upper surface of the motor body,
The surrounding plate portion is located radially outward of a peripheral edge portion of the opening on the upper surface of the motor body. The vehicle air-conditioning blower device according to any one of claims 1 to 5 ,
A bell-mouth component is provided above and spaced apart from the upper surface of the motor body,
the bellmouth component member extends substantially horizontally and has an annular plate portion in which the bellmouth opening is formed, and a leg portion that protrudes downward from the annular plate portion and is supported radially outward of the output shaft relative to the surrounding plate portion on the upper surface of the motor body,
a motor body having a top surface on which a holder for holding the leg portion is provided so as to protrude upward;

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