WO2020110581A1 - Blower device for vehicle air conditioning - Google Patents

Abstract

A bellmouth opening part 61a disposed so as to be set apart above the upper surface of a motor body 5a is provided inside a casing 20. A blower fan 3 is disposed above the bellmouth opening part 61a. A surrounding plate part 57 extending so as to surround an output shaft 5b is formed on the upper surface of the motor body 5a so as to reach higher than the bellmouth opening part 61a.

Description

Ventilation system for vehicle air conditioning

The present invention relates to a vehicle air-conditioning blower configured to blow air-conditioning air mounted on, for example, an automobile or the like, and particularly to a structure in which a blower fan is driven by a motor arranged below the blower fan. Belongs to the technical field of.

Generally, an air conditioner mounted on a vehicle selects one of air inside the vehicle (inside air) and air outside the vehicle (outside air) and sends it as air for air conditioning, and a heat exchanger for cooling and a heat exchanger for heating. After the temperature is adjusted by means of the above, it is configured to be supplied to each part of the vehicle interior.

In recent years, as a vehicle air conditioning blower that blows air for air conditioning, in addition to the inside air circulation mode that blows only the inside air and the outside air introduction mode that blows only the outside air, the inside and outside air that blows both inside air and outside air 2 A device that can be switched to the laminar flow mode has been put into practical use. That is, as disclosed in Patent Document 1, the casing of the vehicle air-conditioning blower has an inside air inlet and an outside air inlet, and an upper layer air passage and a lower layer air passage. Blower fans are provided inside the upper layer air passage and the lower layer air passage, respectively, and these two blower fans are driven by a common motor. Further, the casing is provided with an inside/outside air switching damper that opens and closes the inside air introduction port and the outside air introduction port, and an inside air circulation mode that opens only the inside air introduction port by this inside/outside air switching damper, an outside air introduction mode that opens only the outside air introduction port, The inside/outside air two-layer flow mode can be switched to open the inside air inlet and the outside air inlet. Then, when the two blowers are rotated to the inside air circulation mode, the inside air introduced from the inside air introduction port flows into the upper air passage and the lower air passage, and when the outside air introduction mode is set, the upper air passage and the lower air passage. The outside air introduced from the outside air introduction port flows into the upper air passage and the outside air introduced from the outside air introduction port flows into the upper air passage while the inside air introduced into the lower air passage from the inside air introduction port Flows.

Also, in Patent Documents 2 to 4, a fan is arranged between the upper surface of the motor and the bell mouth opening, and a rib protruding upward is provided on the upper surface of the motor.

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

By the way, for example, rainwater or water used for car washing may enter the inside of the scroll casing through the outside air inlet, and this water collects on the upper surface of the motor located below the scroll casing.

Here, in the case of Patent Document 1, a bell mouth opening for the upper layer air passage and a bell mouth opening for the lower layer air passage are provided at intervals in the vertical direction, and the bell mouth for the lower layer air passage is provided. The opening has a positional relationship in which the opening is separated upward from the upper surface of the motor and faces the upper surface. Assuming such a positional relationship, when the blower fan rotates, the airflow formed by the rotation of the blower fan approaches the bellmouth opening for the lower-layer air passage upward and approaches the output shaft of the motor. It may flow like. Due to this air flow, water accumulated on the upper surface of the motor may flow to the vicinity of the output shaft of the motor and enter the inside of the motor from the vicinity of the output shaft, which may cause a failure of the motor.

On the other hand, it is conceivable to provide a peripheral wall portion projecting upward on the upper surface of the motor as in Patent Document 1, for example, but the upper end portion of this peripheral wall portion is more than the bell mouth opening portion for the lower layer air passage. Since it is located at the bottom, the water on the air flow easily flows over the peripheral wall to the vicinity of the output shaft and easily enters the inside of the motor. In the case of Patent Document 1, a bell mouth member, which is separate from the peripheral wall portion, is provided, and water is prevented by further providing a wall portion for preventing water intrusion in the bell mouth member. Since the mouse member and the motor are separate members, there is a gap between the bell mouth member and the upper surface of the motor, and it is conceivable that water will flow through this gap to the vicinity of the output shaft of the motor.

Further, in Patent Documents 2 to 4, a rib protruding upward is provided on the upper surface of the motor, but in the structure of Patent Documents 2 to 4, a fan for blowing is arranged between the upper surface of the motor and the bell mouth opening. Therefore, it is difficult to make the height of the rib higher than that of the cone-shaped portion of the blower fan. Therefore, there is a possibility that water may get over the ribs especially when the amount of air blown is large.

The present invention has been made in view of the above points, and an object of the present invention is to prevent water from entering the inside of a motor even when a large amount of air is blown.

In order to achieve the above object, the first invention is a casing formed so that an outside air introduction port for introducing air outside the vehicle compartment is opened to the outside of the vehicle compartment, and a motor main body fixed to a lower portion of the casing, Ventilation for vehicle air conditioning including a motor having an output shaft projecting upward from the motor main body, and a fan for blowing, which is arranged in the casing away from the motor main body upward and is connected to the output shaft. In the apparatus, a bell mouth opening is provided inside the casing, the bell mouth opening being spaced apart from an upper surface of the motor main body, and the blower fan is arranged above the bell mouth opening. A surrounding plate portion that extends so as to surround the output shaft is formed on the upper surface of the main body so as to reach above the bell mouth opening portion.

According to this configuration, since the outside air introduction port is open to the outside of the vehicle compartment, rainwater or water for car wash infiltrate into the inside of the casing through the outside air introduction port, and on the upper surface of the motor body located at the bottom of the casing. It may accumulate. When the motor rotates, the blower fan rotates, and the blower fan causes the air in the casing to flow toward the bellmouth opening and may move toward the output shaft of the motor. Is formed so that the enclosing plate part that surrounds the output shaft reaches above the bell mouth opening, so even if there is a large amount of air flow, the water will flow near the output shaft. It is suppressed by the plate part.

A second aspect of the invention is characterized in that a plurality of the enclosing plate portions are formed on the upper surface of the motor body with a space therebetween in the radial direction of the output shaft.

According to this configuration, the outer enclosing plate portion and the inner enclosing plate portion are formed based on the radial direction of the output shaft. The water on the upper surface of the motor body may exceed the outer enclosing plate, but even if it exceeds the outer enclosing plate, the water does not flow near the output shaft due to the existence of the inner enclosing plate. Suppressed.

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

According to this configuration, when water collects at a position closer to the output shaft than the surrounding plate part, it becomes possible to discharge the water from the discontinuous part of the surrounding plate part to the outside.

A fourth invention is characterized in that the upper surface of the motor main body is formed so as to be positioned higher as it approaches the output shaft.

According to this configuration, it becomes difficult for water accumulated on the upper surface of the motor body to flow toward the output shaft.

A fifth aspect of the invention is characterized in that a peripheral edge portion of the output shaft in the enclosing plate portion is formed with a protruding portion that protrudes outward in the radial direction of the output shaft.

According to this configuration, it becomes difficult for the water on the upper surface of the motor body to flow from the edge of the surrounding plate to the output shaft. Further, since the projecting portion acts like a rib of the surrounding plate portion, deformation of the surrounding plate portion is suppressed.

In a sixth aspect, the enclosing plate portion includes an inner enclosing plate portion and an outer enclosing plate portion formed at a distance from the inner enclosing plate portion in a radial direction of the output shaft. A portion and the outer surrounding plate portion, each of which is provided with a discontinuous portion in the circumferential direction of the output shaft, 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.

According to this configuration, when the water reaches the inner enclosing plate portion beyond the discontinuous portion of the outer enclosing plate portion, the discontinuous portions are displaced from each other in the circumferential direction of the output shaft. The distance to reach the discontinuity increases. This enhances the effect of suppressing the flow of water near the output shaft.

In a seventh aspect, an opening through which the output shaft is inserted is opened on an upper surface of the motor body, and the enclosing plate portion is arranged in a radial direction more than a peripheral portion of the opening on the upper surface of the motor body. It is characterized by being located outside.

According to this structure, the water accumulated on the upper surface of the motor body is hard to reach the opening.

An eighth aspect of the present invention includes a bell mouth constituent member provided upwardly away from the upper surface of the motor body, the bell mouth constituent member extending substantially horizontally and having an annular plate portion in which the bell mouth opening is formed. And a leg portion that projects downward from the annular plate portion and that is supported radially outward of the output shaft with respect to the surrounding plate portion on the upper surface of the motor body, and the upper surface of the motor body has the The holding portion for holding the leg portion is provided so as to project upward.

According to this configuration, since the holding portion that holds the leg portion of the bell mouth constituent member is separated from the bell mouth opening portion, deterioration of ventilation resistance due to the provision of the holding portion is suppressed.

According to the first aspect of the present invention, the bell mouth opening is provided apart from the upper surface of the motor main body, the fan for blowing is arranged above the bell mouth opening, and the output shaft is provided on the upper surface of the motor main body. Since the enclosing plate part that extends so as to surround it is formed so as to reach above the bell mouth opening, it is possible to suppress water intrusion into the motor even when there is a large air flow, The frequency of failures due to can be significantly reduced.

According to the second aspect of the invention, since the plurality of enclosing plate portions are formed on the upper surface of the motor body with a space therebetween in the radial direction of the output shaft, the effect of suppressing water intrusion into the motor can be further enhanced. it can.

According to the third aspect of the invention, since the enclosing plate portion is discontinuous in the circumferential direction of the output shaft, when water is collected nearer to the output shaft than the enclosing plate portion, the water is separated from the enclosing plate portion. It can be discharged from the continuous part.

According to the fourth aspect of the invention, since the upper surface of the motor main body is positioned higher as it approaches the output shaft, it is difficult for water accumulated on the upper surface of the motor main body to flow toward the output shaft. It is possible to further enhance the effect of suppressing the infiltration of water.

According to the fifth aspect of the invention, since the protruding portion that protrudes outward in the radial direction is formed at the edge portion of the enclosing plate portion, it is difficult for water on the upper surface of the motor body to flow from the edge portion of the enclosing plate portion toward the output shaft. Therefore, it is possible to enhance the effect of suppressing water from entering the inside of the motor, and it is possible to suppress deformation of the enclosing plate portion.

According to the sixth aspect, since the discontinuous portion of the inner enclosing plate portion and the discontinuous portion of the outer enclosing plate portion are displaced from each other in the circumferential direction of the output shaft, the discontinuity portion of the outer enclosing plate portion is inward from the discontinuous portion. The distance to the discontinuous portion of the enclosing plate portion becomes long, so that the effect of suppressing water intrusion into the motor can be further enhanced.

According to the seventh aspect of the invention, since the enclosing plate is positioned outside the peripheral edge of the opening through which the output shaft is inserted, it is possible to prevent water from entering the inside of the motor body through the opening.

According to the eighth invention, when the bell mouth component member is provided as a separate member, the holding portion that holds the leg portion of the bell mouth component member can be separated from the bell mouth opening portion. It is possible to suppress the deterioration of ventilation resistance due to.

It is the perspective view which looked at the ventilation device for air conditioning of vehicles concerning the embodiment of the present invention from the back side of vehicles. It is a left side view of a ventilation device for vehicle air conditioning. It is a bottom view of the ventilation device for vehicle air conditioning. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. FIG. 3 is an exploded perspective view showing a blower fan, bellmouth component members, and a motor. It is a top view of a motor. It is the figure which looked at the motor from the back side. It is the figure which looked at the motor from the right side. It is the figure which looked at the motor which assembled the bell mouth constituent member from the back side. It is the figure which looked at the motor which assembled the bell mouth constituent member from the right side. FIG. 10 is an enlarged view of part A in FIG. 9. FIG. 10 is a sectional view taken along line XII-XII in FIG. 9.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely an example in essence, and is not intended to limit the present invention, its application, or its application.

FIG. 1 is a view of a vehicle air conditioning blower 1 according to an embodiment of the present invention as seen from the vehicle rear side, FIG. 2 is a view of the vehicle air conditioner blower 1 as seen from the left side, and FIG. 3 is shown. It is the figure which looked at the ventilation device 1 for vehicle air conditioning from the lower part. The vehicle air-conditioning blower 1 is provided, for example, in a passenger compartment of an automobile to blow air-conditioning air, and constitutes a vehicle air-conditioner together with an air-conditioning unit and a refrigeration cycle device (not shown). The refrigeration cycle device is a conventionally known device that includes a compressor, a condenser, an expansion valve, and an evaporator. The compressor may be driven by the vehicle engine or an electric motor. May be. The vehicle air conditioner includes a vehicle air conditioner blower 1, a refrigeration cycle device, and an air conditioning controller (not shown) that controls the air conditioning unit.

The air conditioning unit includes, for example, a cooling heat exchanger including an evaporator of a refrigeration cycle, a heating heat exchanger including a heater core, an air mix damper, a blowing direction switching damper, and an air conditioning casing that houses these. There is. The air-conditioning air blown from the vehicle air-conditioning blower 1 is introduced into the air-conditioning casing, passes through the cooling heat exchanger and the heating heat exchanger to become the conditioned air of a desired temperature, and then blows out. It is supplied to each part of the vehicle compartment according to the blowout mode set by the switching damper. The temperature of the conditioned air is adjusted according to the amount of air passing through the heating heat exchanger set by the air mix damper. Although not shown, the air-conditioning air outlets include, for example, a defrost outlet, a vent outlet, and a heat outlet (also referred to as a foot outlet), which are individually opened and closed by an outlet switching damper to set the outlet mode. It is possible to switch. In general, the defrost outlet is open upward and the heat outlet is open downward. The defrost outlet is an opening for supplying conditioned air to the inner surface of the windshield. The heat outlet is an opening mainly for supplying the conditioned air to the vicinity of the occupant's feet, and can be formed at the end of the heat duct.

In this embodiment, the vehicle front side is simply referred to as “front”, the vehicle rear side is simply referred to as “rear”, the vehicle left side is simply referred to as “left”, and the vehicle right side is simply referred to as “right”. However, this is only defined for the convenience of description, and does not limit the actual use state, installation state, or assembly state.

The vehicle air conditioning blower 1 is housed together with an air conditioning unit inside an instrument panel (not shown) provided at the front end of the vehicle compartment. The air-conditioning unit is arranged inside the instrument panel at a substantially central portion in the left-right direction, while the vehicle air-conditioning blower 1 has a passenger-side side of the air-conditioning unit inside the instrument panel (left side in the case of a right-hand drive vehicle). , In the case of a left-hand drive car, it is placed on the right side). In this embodiment, the case where the vehicle air-conditioning blower 1 is arranged on the right side of the vehicle will be described. However, when it is arranged on the left side of the vehicle, the structure of this embodiment may be left-right symmetric. Detailed description is omitted. Further, the position where the vehicle air-conditioning blower 1 is installed is not particularly limited, and can be appropriately set according to the vehicle layout request.

(Vehicle configuration)
Although not shown, the vehicle in which the vehicle air conditioning blower 1 is provided includes a dash panel (partitioning member) for partitioning the engine room and the vehicle compartment. The engine room is provided in the front part of the vehicle, and is provided with an engine, a transmission, and the like. The dash panel extends substantially vertically. A cowl extending in the left-right direction is arranged on the upper part of the dash panel. A communication port that communicates with the outside of the vehicle compartment is formed in the cowl. Since the cowl is arranged outside the vehicle compartment, rainwater, water for washing the vehicle, snow, etc. may enter the cowl.

(Structure of the vehicle air conditioning blower 1)
As shown in FIGS. 1 to 4, a vehicle air conditioning blower 1 includes a blower casing 2, a blower fan 3, a motor 5 for rotationally driving the blower fan 3, and a first inside/outside air switching damper 6. 2, 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, the second inside/outside air switching damper 7, and the air filter 8 are housed in the blower casing 2.

A front inside air inlet 2a and a rear inside air inlet 2b shown in FIG. 2 and an outside air inlet 2c shown in FIG. 4 are formed on the upper side of the blower casing 2. As shown in FIG. 2, the front inside air introduction port 2a is formed at a position closer to the front than the central portion in the front-rear direction on the upper side of the blower casing 2, and opens in the vehicle compartment. Further, the rear inside air introduction port 2b is formed at a position on the upper side of the blower casing 2 closer to the rear than the central portion in the front-rear direction, and opens into the vehicle interior. Air (inside air) in the vehicle compartment can be introduced into the blower casing 2 through the front inside air inlet 2a and the rear inside air inlet 2.

As shown in FIG. 4, on the upper side of the blower casing 2, the outside air introducing duct portion 2d is installed in the blower casing 2 so as to bulge upward from a portion between the front inside air introducing port 2a and the rear inside air introducing port 2b. It is integrally molded. The upper side of the outside air introducing duct portion 2d extends forward. An outside air introduction port 2c is opened at the front end of this outside air introduction duct portion 2d. The outside air introducing duct portion 2d is connected to the cowl, and the outside air introducing port 2c communicates with the outside of the vehicle compartment through the cowl and is opened to the outside of the vehicle compartment. Air (outside air) outside the vehicle compartment can be introduced into the blower casing 2 through the outside air inlet 2c.

As shown in FIG. 4, the filter 8 is housed inside the blower 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 so as to extend in the horizontal direction. The peripheral portion of the filter 8 is supported by the filter support portion 2e provided inside the blower casing 2. A filter insertion hole 2f for inserting the filter 8 into the blower casing 2 is formed in the rear wall portion of the blower casing 2. The filter insertion hole 2f is closed by a lid 8a provided at the rear end 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 blower casing 2 above the filter 8. The partition wall portion 2g extends in the up-down direction, and is slightly inclined so that the partition wall portion 2g is positioned closer to the lower end portion so as to be located later. Inside the blower casing 2, a first air passage R1 is formed on the front side of the partition wall portion 2g, and a second air passage R2 is formed on the rear side of the partition wall portion 2g. The width of the first air passage R1 in the front-rear direction is set wider than the width of the second air passage R2 in the front-rear direction, and the cross-sectional area of the first air passage R1 is wider than the cross-sectional area of the second air passage R2. Is becoming

The upstream end (upper end) of the first air passage R1 communicates with the front inside air introduction port 2a and the outside air introduction port 2c. The upstream end (upper end) of the second air passage R2 communicates with the rear inside air introduction port 2b and the outside air introduction port 2c. The first air passage R1 and the second air passage R2 communicate with a common outside air inlet 2c, but the inside air inlets communicate with different inside air inlets 2a and 2b. As a result, a structure in which the inside air and the outside air can 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 in front of the partition wall portion 2g, and includes a closing plate portion 6a, a shaft portion 6b, and an end plate portion 6c. The closing plate portion 6a extends in the left-right direction. The shaft portion 6b also extends in the left-right direction and is rotatably supported by the left and right side wall portions of the blower casing 2. The end plate portion 6c is provided near both ends of the shaft portion 6b in the left-right direction. The end plate portion 6c extends in the radial direction from the shaft portion 6b and is continuous with the left and right end portions of the closing plate portion 6a. The closing plate portion 6a, the shaft portion 6b, and the end plate portion 6c are integrally formed. By rotating the first inside/outside air switching damper 6 around the center line of the shaft portion 6b, a state in which the first inside/outside air switching damper 6 rotates forward as shown in FIG. Can be switched to. When the first inside/outside air switching damper 6 is turned to the front, the front inside air inlet 2a is closed and the outside air inlet 2c is opened, so that the inflow of the inside air is blocked and the outside air becomes the first air. It is introduced into the upstream part of the passage R1. On the other hand, when the first inside/outside air switching damper 6 is rotated rearward, the front inside air introduction port 2a is opened and the outside air introduction port 2c is closed, so that the inflow of outside air is blocked and the inside air becomes the first inside air. It is introduced into the upstream part of the air passage R1.

The second inside/outside air switching damper 7 is disposed inside the blower casing 2 on the rear side of the partition wall portion 2g, and like the first inside/outside air switching damper 6, includes the closing plate portion 7a and the shaft portion 7b. And an end plate portion 7c. The second inside/outside air switching damper 7 is rotated around the center line of the shaft portion 7b so as to switch between a state in which the damper is rotated rearward as shown in FIG. 4 and a state in which it is rotated forward (not shown). Be done. When the second inside/outside air switching damper 7 is turned rearward, the rear inside air introduction port 2b is closed and the outside air introduction port 2c is opened, so that the inflow of the inside air is blocked and the outside air flows into the second air passage R2. Will be introduced in the upstream part of. On the other hand, when the second inside/outside air switching damper 7 is turned forward, the rear inside air introduction port 2b is opened and the outside air introduction port 2c is closed, so that the inflow of outside air is blocked and the inside air enters the second state. It is introduced into the upstream part of the air passage R2.

The first inside/outside air switching damper 6 and the second inside/outside air switching damper 7 are driven by the inside/outside air switching actuator 9 shown in FIGS. 1 and 2. Although not shown, the inside/outside air switching actuator 9 is controlled by an air conditioning controller. 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 link member 9a is rotated by the inside/outside air switching actuator 9. By doing so, the first inside/outside air switching damper 6 and the second inside/outside air switching damper 7 can be interlocked. Since a conventionally known method can be used for the interlocking structure of the first inside/outside air switching damper 6 and the second inside/outside air switching damper 7 using the link member 9a, detailed description thereof will be omitted. Further, the first inside/outside air switching damper 6 and the second inside/outside air switching damper 7 may be separately driven 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, an outside air introduction mode in which the first inside/outside air switching damper 6 is rotated forward and a second inside/outside air switching damper 7 is rotated backward, and a first inside/outside air switching damper. 6 is rotated rearward and the second inside/outside air switching damper 7 is rotated forward, and the first inside/outside air switching damper 6 is rotated forward and second inside/outside air is switched. The damper 7 can be switched to an arbitrary one of three modes including an inside/outside air two-layer flow mode in which the damper 7 is rotated forward.

In the outside air introduction mode, since the first inside/outside air switching damper 6 rotates forward and the second inside/outside air switching damper 7 rotates rearward, the first air passage R1 and the second air passage R2 are not connected to each other. Only outside air is introduced. Therefore, the outside air introduction mode of this embodiment can also be called an all outside air mode in which all the air introduced into the blower casing 2 is outside air. On the other hand, in the inside air circulation mode, since the first inside/outside air switching damper 6 rotates rearward and the second inside/outside air switching damper 7 rotates frontward, the first air passage R1 and the second air passage R2. Only shyness is introduced into. Therefore, the inside air circulation mode of this embodiment can also be called an all inside air mode in which all the air introduced into the blower casing 2 becomes 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 toward the front, so that outside air flows in the first air passage R1. The internal air is introduced into the second air passage R2. The inside/outside air two-layer flow mode is a mode used at the time of heating, and the outside air and the inside air are introduced into the blower casing 2 at the same time, and can be simply referred to as the two-layer mode.

Switching between the inside air circulation mode, the outside air introduction mode, and the inside/outside air two-layer flow mode is performed by the conventionally known automatic air conditioner control. By using the two-layer internal/external air mode, it is possible to supply relatively dry outside air to the defrost outlet in winter and to clear the windshield windshield, while supplying relatively warm inside air to the heat outlet. The heating efficiency can be improved. Therefore, it is possible to improve both the heating capacity and the antifogging property.

A scroll casing 20 in which the blower fan 3 is housed is provided below the inside air inlets 2a and 2b and the outside air inlet 2c of the blower casing 2. As shown in FIG. 1 and FIG. 2, the scroll casing 20 includes an upper scroll casing member 21 in which an upper layer blower fan 30 is housed, a lower scroll casing member 22 in which a lower layer blower fan 31 is housed, and a bottom wall. And a member 23. As shown in FIG. 4, a partition plate 24 for partitioning the inside of the scroll casing 20 into a first air passage R1 and a second air passage R2 is provided at an intermediate portion in the vertical direction inside the scroll casing 20. ing. The inside of the scroll casing 20 is vertically divided by a partition plate 24, a first air passage R1 is formed above the partition plate 24, and a second air passage R2 is formed below the partition plate 24. Therefore, the first air passage R1 located above the partition plate 24 can be called the upper layer air passage, and the second air passage R2 located below the partition plate 24 is located in the lower layer. It can be called an air passage.

The upper scroll casing member 21 and the lower scroll casing member 22 are integrated by fitting the lower portion of the upper scroll casing member 21 and the upper portion of the lower scroll casing member 22. Further, the lower scroll casing member 22 and the bottom wall member 23 are fitted to each other so that the lower scroll casing member 22 and the bottom wall member 23 are integrated with each other.

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 are rotationally driven by the common motor 5. As shown in FIG. 4, the upper-layer blower fan 30 is disposed in the first air passage R1 in a posture in which the rotation center line extends in the vertical direction. The lower-layer blower fan 31 is disposed in the second air passage R2 with the rotation center line extending vertically. The upper layer blowing fan 30 and the lower layer blowing fan 31 may be integrally formed, or may be combined as separate members.

A substantially circular first bell mouth opening (upper bell mouth opening) 21a is formed on the upper wall portion of the upper scroll casing member 21 so as to open inside the blower casing 2. The first bell mouth opening 21 a is arranged so as to face the lower surface of the filter 8. The upper layer blowing fan 30 is located immediately below the first bell mouth opening 21a, and therefore, the first bell mouth opening 21a also faces the upper side blowing fan 30 above. The upper side of the upper layer blower fan 30 is the air suction side, and the air is sucked in from the upper side of the upper layer blower fan 30.

A protruding wall portion 21b protruding upward is provided on the upper wall portion of the upper scroll casing member 21. The protruding wall portion 21b is positioned behind the opening edge portion of the first bell mouth opening portion 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 upper side of the upper scroll casing member 21 inside the blower casing 2 is partitioned in the front-rear direction by the protruding wall portion 21b and the partition wall portion 2g, and the first air is provided in front of the protruding wall portion 21b and the partition wall portion 2g. The upstream side of the passage R1 is formed, 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 so as to penetrate the filter 8 and can be projected upward from the upper surface of the filter 8.

The first air passage R1 communicates with the inside of the upper scroll casing member 21 via the first bell mouth opening 21a, and the inside of the upper scroll casing member 21 is a part of the first air passage R1 (downstream side). Part). The upper side of the partition plate 24 is the downstream side portion of the first air passage R1. The upper-layer blower fan 30 is arranged in the first air passage R1 inside the upper scroll casing member 21. When the upper-layer blower fan 30 rotates inside the upper scroll casing member 21, the upper-layer blower fan 30 blows air in the first air passage R1 as air conditioning air. That is, the upper layer blower fan 30 is a member for forming a flow of air in the upper layer.

As shown in FIG. 4, the partition plate 24 is formed with a through hole 24a into which the upper-layer blower 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 layer blower fan 30. This allows the upper-layer blower fan 30 to be easily inserted into the through hole 24a.

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

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

As shown in FIGS. 4 and 5, a bell mouth component member 60 is provided inside the scroll casing 20. The bellmouth constituent member 60 is a member that constitutes the vehicle air-conditioning blower 1, and is a separate member from the scroll casing 20 and the motor 5. The material of the bellmouth constituent member 60 may be a resin material.

The bell mouth component member 60 has a bell mouth plate portion (annular plate portion) 61 that extends substantially horizontally and a plurality of legs 62. The bell mouth plate portion 61 and the leg portion 62 may be integrally formed, or may be formed by separate members.

A second bell mouth opening portion (bell mouth opening portion of the present invention) 61 a is formed in the bell mouth plate portion 61. Since the bell mouth plate portion 61 is supported by the leg portion 62, the bell mouth plate portion 61 is provided apart from the upper surface of the motor main body 5a of the motor 5 upward. Therefore, the second bellmouth opening 61a is arranged apart from the upper surface of the motor main body 5a upward, and is arranged so as to face the lower side of the blower fan 3.

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

The inner peripheral side of the bell mouth plate portion 61 is formed in a curved shape so as to be positioned higher as it approaches the second bell mouth opening portion 61a. An outer peripheral side of the curved portion of the bell mouth plate portion 61 is formed flat, and a plurality of bell mouth drain holes 61b (shown in FIG. 5) are formed in the flat portion. It is formed at intervals in the circumferential direction. That is, a bell mouth drainage hole for draining water on the upper surface of the bell mouth plate portion 61 to the lower side of the bell mouth plate portion 61 on the outer peripheral side of the bell mouth plate portion 61 from the second bell mouth opening portion 61a. 61b is formed, and the formation of the bell mouth drain hole 61b prevents water from remaining on the upper surface of the bell mouth plate portion 61. The water dripped downward from the bellmouth drainage hole 61b flows into a drainage passage D, which will be described later, and is drained out of the vehicle compartment from a drain portion provided in the air conditioning unit.

The bell mouth drain holes 61b can be formed at equal intervals in the circumferential direction of the bell mouth plate portion 61, that is, in the circumferential direction of the blower fan 3, but they may be formed at irregular intervals. Although the number of the bell mouth drain holes 61b is three in this embodiment, it may be one or two, or may be four or more. The bell mouth drain hole 61b may have a circular shape, an elliptical shape, a slit shape, a rectangular shape, or the like.

The leg portion 62 projects downward from the periphery of the opening of the bell mouth drain hole 61b on the lower surface of the bell mouth plate portion 61, and is a portion for supporting the bell mouth plate portion 61 from below. Since the leg portions 62 extend from the periphery of the openings of the bell mouth drain holes 61b, three leg portions 62 are provided in this embodiment. The number of legs 62 and the number of bellmouth drain holes 61b may not be the same, and one may be larger than the other.

As shown in FIG. 12, the leg portion 62 has a concave cross section that opens inward in the radial direction of the blower fan 3. As a result, when the blower fan 3 is rotated, it is difficult for the air flowing from the outside to the inside in the radial direction of the blower fan 3 to flow inwardly of the leg portion 62. It acts as a wind shield that suppresses wind from reaching around the opening of the hole 61b.

The lower end of the leg portion 62 is adapted to be supported more radially outside the output shaft 5b than the surrounding plate portions 55 to 57 (details will be described later) on the upper surface of the motor body 5a. In this embodiment, since the bottom surface of the scroll casing 20 is configured by the upper surface of the cover portion 50 (described later) of the motor body 5a, the lower end portion of the leg portion 62 is located above the outer peripheral portion of the cover portion 50 from above. You will come into contact. Therefore, the bell mouth component member 60 is supported by the cover portion 50, and the height of the second bell mouth opening 61a is determined to be the desired height.

The lower portion of the second air passage R2 communicates with 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 has a second air passage R2. Is a part (downstream side part). The portion below the partition plate 24 is the downstream side portion of the second air passage R2. The lower-layer blower fan 31 is arranged inside the lower scroll casing member 22 at a downstream side portion of the second air passage R2. When the lower-layer blower fan 31 rotates, the lower-layer blower fan 31 blows the air in the second air passage R2 as air-conditioning air. That is, the lower-layer blower fan 31 is a member for forming a flow of air in the lower layer.

As shown in FIG. 2, a lower side air outlet 22c connected to the air conditioning unit is formed on the front side of the left side wall portion of the lower side 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 communicates with the lower air outlet 22c, and the air in the second air passage R2 is blown out from the lower air outlet 22c to the outside of the lower scroll casing member 22. It has become.

The bottom wall member 23 is a cover-like member that is formed so as to cover the lower end of the lower scroll casing member 22 and covers the lower end. The peripheral edge portion of the bottom wall member 23 is formed so as to be fitted to the peripheral edge portion of the lower end portion of the lower scroll casing member 22, and the peripheral edge portion of the bottom wall member 23 and the lower end portion of the lower scroll casing member 22. Air is prevented from leaking from the periphery of the.

The bottom wall member 23 is formed with a lower end opening 23a. 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 in a state where the motor body 5a is fitted into the lower end opening 23a from below. Fixed.

The motor 5 has, in addition to the motor body 5a fixed to the bottom wall member 23 that is the lower part of the blower casing 2, an output shaft 5b protruding upward from the motor body 5a. The motor body 5a has an internal mechanism including a rotor and the like, and also has a cover portion 50 that covers the internal mechanism from above. The upper surface of the motor body 5a is configured by the upper surface of the cover portion 50. An opening 50a through which the output shaft 5b is inserted is formed in the central portion of the cover portion 50 so as to penetrate the cover portion 50 in the vertical direction. Therefore, the opening portion 50a opens on the upper surface of the motor body 5a. It will be.

The output shaft 5b is inserted into the opening 50a of the cover 50, protrudes upward from the upper surface of the motor body 5a, and is arranged concentrically with the first bell mouth opening 21a and the second bell mouth 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, the upper-layer blower fan 30 rotates in the first air passage R1, and the lower-layer blower fan 31 moves. It 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 so as to achieve a desired rotation speed.

As shown in FIGS. 4 and 5, the cover portion 50 includes an outer peripheral side peripheral wall portion 51 extending in the vertical direction, and a horizontal wall portion 52 extending from the upper end portion of the outer peripheral side peripheral wall portion 51 inward in the radial direction of the output shaft 5b. The inner peripheral wall portion 53 extends upward from the inner end portion of the horizontal wall portion 52, and the inner peripheral wall portion 53 is positioned so as to be located higher as it gets closer to the output shaft 5b inward in the radial direction of the output shaft 5b from the upper end portion of the inner peripheral wall portion 53. And the formed inclined wall portion 54. The radially outer end portion of the outer peripheral side peripheral wall portion 51 is a portion fitted to the inner peripheral surface of the lower end opening portion 23 a 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 body 5a. Further, due to the formation of the inclined wall portion 54, the upper surface of the motor body 5a has a shape that is positioned higher as it approaches the output shaft 5b. Further, the outer peripheral side 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 formed of, for example, a resin material.

A lower enclosing plate portion 55, an outer enclosing plate portion 56, and an inner enclosing 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 formed with the inclined wall portion 54.

The lower enclosing plate portion 55 projects upward from the outer peripheral side portion of the inclined wall portion 54 and extends so as to surround the output shaft 5b. The upper end of the lower enclosing plate portion 55 is located below the second bell mouth opening 61 a and the bell mouth plate portion 61. A plurality of slits 55a that are continuous from the upper end to the lower end of the lower enclosing plate portion 55 are formed at intervals in the circumferential direction of the output shaft 5b. Due to the formation of the slit 55a, the lower enclosing plate portion 55 is provided with a portion (discontinuous portion) that is discontinuous in the circumferential direction of the output shaft 5b. The lower surrounding plate portion 55 may be continuous in the circumferential direction.

An outer enclosing plate portion 56, which extends so as to enclose the output shaft 5b, projects upward from a portion inside the lower enclosing plate portion 55 of the inclined wall portion 54. The outer enclosing plate portion 56 is formed so as to reach above the second bell mouth opening portion 61a. A plurality of slits 56a continuous from the upper end to the lower end of the outer enclosing plate portion 56 are formed at intervals in the circumferential direction of the output shaft 5b. Due to the formation of the slit 56a, the outer surrounding plate portion 56 is provided with a portion (discontinuous portion) which is discontinuous in the circumferential direction of the output shaft 5b. The outer enclosing plate portion 56 may be continuous in the circumferential direction.

An inner enclosing plate portion 57 that extends so as to surround the output shaft 5b projects upward from a portion inside the outer enclosing plate portion 56 of the inclined wall portion 54. The outer enclosing plate portion 56 and the inner enclosing plate portion 57 are formed on the upper surface of the motor body 5a with a space therebetween in the radial direction of the output shaft 5b. The inner enclosing plate portion 57 is formed so as to reach above the second bell mouth opening portion 61a. The upper end of the inner enclosing plate portion 57 is located above the upper end of the outer enclosing plate portion 56.

A plurality of slits 57a that are continuous from the upper end to the lower end of the inner enclosing plate portion 57 are formed at intervals in the circumferential direction of the output shaft 5b. Due to the formation of the slits 57a, the inner surrounding plate portion 57 is provided with a portion (discontinuous portion) which is discontinuous in the circumferential direction of the output shaft 5b. The inner surrounding plate part 57 may be continuous in the circumferential direction.

The discontinuous portion of the inner enclosing plate portion 57 and the discontinuous portion of the outer enclosing plate portion 56 are displaced from each other in the circumferential direction of the output shaft 5b. That is, the forming position of the slit 57a of the inner surrounding plate portion 57 and the forming 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 taken as a reference, and viewed from the side. At this time, the slits 57a of the inner enclosing plate portion 57 and the slits 56a of the outer enclosing plate portion 56 are set so that the slits 56a and 57a are formed so as not to overlap each other. In addition, the inner enclosing plate portion 57 and the inner enclosing plate portion 57 are located radially outside of the peripheral portion of the opening 50a on the upper surface of the motor body 5a.

A protrusion 57b that protrudes radially outward of the output shaft 5b is formed at the end of the slit 57a (the circumferential edge of the output shaft 5b) in the inner surrounding plate 57. The protruding portion 57b has a rib shape that continuously extends from the upper edge to the lower edge of the slit 57a, and is continuous with the upper surface of the inclined wall portion 54. The formation of the protruding portion 57b improves the rigidity of the inner surrounding plate portion 57, and the deformation of the inner surrounding plate portion 57 can be suppressed.

An outer holding portion 52a and an inner holding portion 52b that hold the legs 62 of the bellmouth component member 60 are provided on the upper surface of the cover portion 50 so as to project upward. As shown in FIG. 11 and FIG. 12, the leg portion 62 is provided at its lower portion with a protrusion portion 62a that protrudes outward in the radial direction. The outer holding portion 52a is a portion that holds the leg portion 62 from the outside in the radial direction, and has an engagement hole 52c with which the protrusion portion 62a is engaged. The inner holding portion 52b is a portion that holds the leg portion 62 from the inside in the radial direction. As a result, the leg portion 62 is held from both sides in the radial direction by the outer holding portion 52a and the inner holding portion 52b, and the bell mouth component member 60 is positioned with respect to the cover portion 50.

(Structure of blower fan 3)
As shown in FIG. 4, the blower fan 3 is arranged above the second bell mouth opening 61a, and the fixed portion 33 fixed to the output shaft 5b of the motor 5 and the fixed portion 33 are fixed. A cone portion 34 extending in the radial direction of the rotating shaft 5c, an upper-layer blower fan 30 including a plurality of upper blades fixed to the outside of the cone portion 34 in the radial direction, and a cone portion 34 fixed to the outside of the cone portion 34 in the radial direction. And a lower-layer blower fan 31 including a large number of lower blades. The fixed portion 33, the cone portion 34, the upper blade and the lower blade may be integrally molded products made of a resin material, but may be configured by combining different members. The blower fan 3 is a centrifugal fan.

The fixed part 33 is formed in a tubular shape into which the output shaft 5b of the motor 5 is inserted. Since the means for fixing the fixed portion 33 to the output shaft 5b of the motor 5 has conventionally been the surroundings, detailed description thereof will be omitted.

(Motor 5 cooling structure)
The scroll casing 20 is provided with a cooling structure for the motor 5. That is, as shown by broken lines in FIGS. 1 and 2, a cooling air passage S for supplying cooling air to the motor 5 is formed in the left side portion of the scroll casing 20 so as to extend in the vertical direction. The upper side portion of the cooling air passage S is an upstream side 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 is provided on the left side thereof with an upper concave portion 21e formed so as to be recessed upward and opened downward. The upstream side portion of the cooling air passage S is configured by the internal space of the upper concave portion 21e. A tubular portion 22e extending in the vertical direction is formed on the left side portion of the lower scroll casing member 22 so as to be positioned immediately below the upper concave portion 21e. An upper end and a lower end of the tubular portion 22e are open. The upper end of the tubular 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 tubular portion 22e communicate with each other. The vertical middle part of the cooling air passage S is formed by the internal space of the tubular portion 22e.

A bottom concave portion 23e is formed on the left side of the bottom wall member 23 so as to be recessed downward and open upward. The lower concave portion 23e is formed so as to be located immediately below the tubular portion 22e, and the lower end portion of the tubular portion 22e is connected to the upper end portion of the lower concave portion 23e so that the lower portion of the tubular portion 22e is connected. The internal space and the internal space of the lower concave portion 23e communicate with each other. The lower portion of the cooling air passage S is formed by the internal space of the lower concave portion 23e.

A bulging portion 23f that bulges rearward is formed on the lower portion of the left side portion of the bottom wall member 23. The bulging portion 23f is opened downward. The inner space of the bulging portion 23f communicates with the inner space of the lower concave portion 23e, and the inner space of the bulging portion 23f constitutes the lower end portion (downstream end portion) of the cooling air passage S. That is, the cooling air passage S is formed by the internal space of the upper concave portion 21e, the internal space of the tubular portion 22e, the internal space of the lower concave portion 23e, and the internal space of the bulging portion 23f, and becomes a long passage in the vertical direction. , Its lower end is bent rearward and opened downward.

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

(Structure of drainage passage D)
As shown in FIG. 4, a drain passage D is formed in the lower portion of the scroll casing 20. The drainage passage D is formed in the bottom wall member 23 and is located below the second air passage R2. The downstream end of the drainage passage D is connected to the air conditioning unit, and the water in the drainage passage D flows into the air conditioning unit and is drained to the outside of the vehicle compartment from the drain portion provided in the air conditioning unit. The drain part provided in the air conditioning unit is a part for draining condensed water generated on the surface of the cooling heat exchanger, and is well known in the art. Although not shown, a drain hose or the like extending to the outside of the vehicle compartment is connected to the drain portion.

(Operation and effect of the embodiment)
As described above, according to the vehicle air conditioning blower 1 of this embodiment, when the inside air/outside air switching dampers 6 and 7 open the inside air inlets 2a and 2b and the outside air inlet 2c is closed, The inside air circulation mode in which the inside air is introduced from the inside air introduction ports 2a and 2b is set. In the inside air circulation mode, the inside air introduced from the inside air introduction ports 2a and 2b flows through the first air passage R1 and the second air passage R2 by the rotation of the upper-layer blower fan 30 and the lower-layer blower fan 31 for air conditioning. It is blown as air. When the inside air/outside air switching dampers 6 and 7 close the inside air inlets 2a and 2b and open the outside air inlet 2c, the outside air introduction mode in which outside air is introduced from the outside air inlet 2c is set. In the outside air introduction mode, by rotating the first air passage R1 and the second air passage R2, the outside air introduced from the outside air introduction port 2c flows through the first air passage R1 and the second air passage R2 to serve as air conditioning air. Blown. Further, when the inside air/outside air switching dampers 6 and 7 are operated to open the inside air inlets 2a, 2b and the outside air inlet 2c, the inside/outside air two-layer flow mode is set, and the upper layer blowing fan 30 and the lower layer blowing fan 31 rotate. As a result, both air are blown as air conditioning air.

In the outside air introduction mode and the inside/outside air two-layer flow mode, since the outside air introduction port 2c is opened by the inside/outside air switching dampers 6 and 7, rainwater or water for car wash is supplied from the outside air introduction port 2c to the first air passage R1 of the blower casing 2. May penetrate into. The water that has entered the first air passage R1 may collect on the upper surface of the motor main body 5a located at the lower portion of the blower casing 2, that is, the upper surface of the cover portion 50. When the motor 5 rotates, the blower fan 3 rotates, and the blower fan 3 causes the air in the blower casing 2 to flow toward the second bellmouth opening 61a and approaches the output shaft 5b of the motor 5. Although it may flow, since the enclosing plate portions 56 and 57 extending so as to surround the output shaft 5b are formed on the upper surface of the motor main body 5a so as to reach above the second bell mouth opening 61a, Even when the air volume is large, water is suppressed from flowing to the vicinity of the output shaft 5b. Therefore, it is possible to prevent water from entering the inside of the motor 5, and it is possible to significantly reduce the frequency of failure of the motor 5 due to water entering.

Further, since the plurality of enclosing plate portions 55 to 57 are formed on the upper surface of the motor main body 5a so as to be spaced from each other in the radial direction of the output shaft 5b, the effect of suppressing water intrusion into the motor 5 can be further enhanced. it can.

Further, since the enclosing plate portions 55 to 57 are discontinuous in the circumferential direction of the output shaft 5b, when water is collected in a place closer to the output shaft 5b than the lower enclosing plate portion 55, or from the outer enclosing plate portion 56. Also, when water is collected near the output shaft 5b, the water can be discharged to the outside from the discontinuous portions of the enclosing plate portions 55 and 56.

Moreover, since the upper surface of the motor body 5a is located higher as it approaches the output shaft 5b, it becomes difficult for water accumulated on the upper surface of the motor body 5a to flow toward the output shaft 5b, and the water inside the motor 5 is prevented. The effect of suppressing the infiltration of water can be further enhanced.

Further, since the protruding portion 57b that protrudes outward in the radial direction is formed on the edge portion of the inner surrounding plate portion 57, the water on the upper surface of the motor body 5a flows from the edge portion of the inner surrounding plate portion 57 toward the output shaft 5b. As a result, the effect of suppressing water intrusion into the motor 5 can be enhanced. Moreover, the deformation of the inner surrounding plate portion 57 can be suppressed. Note that similar protrusions may be provided on the outer enclosing plate portion 56 and the lower enclosing plate portion 55.

Further, since the non-continuous portion of the inner enclosing plate portion 57 and the non-continuous portion of the outer enclosing plate portion 56 are displaced from each other in the circumferential direction of the output shaft 5b, the non-continuous portion of the outer enclosing plate portion 56 is separated from the inner enclosing plate portion. The distance to the discontinuous portion of the portion 57 becomes longer, so that the effect of suppressing water infiltration into the motor 5 can be further enhanced.

Further, since the enclosing plate portions 55 to 57 are positioned outside the peripheral portion of the opening 50a through which the output shaft 5b is inserted, it is possible to prevent water from entering the inside of the motor body 5a through the opening 50a.

Further, when the bell mouth component member 60 is provided as a separate member, the holding portions 52a and 52b that hold the leg portions 62 of the bell mouth component member 60 can be separated from the second bell mouth opening portion 61a, so that the holding portion 52a. , 52b, it is possible to suppress deterioration of ventilation resistance.

The above embodiments are merely examples in all respects, and should not be limitedly interpreted. Furthermore, all modifications and changes belonging to the equivalent 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 having a structure in which it is not possible to switch to the two-layer internal/external air mode.

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

1 Vehicle Air Conditioning Blower 2 Blower Casings 2a, 2b Inside Air Inlet 2c Outside Air Inlet 5 Motor 5a Motor Body 5b Output Shaft 6 1st Inside/Outside Air Switching Damper 7 2nd Inside/Outside Air Switching Damper 20 Scroll Casing 30 Upper Layer Fan 31 Lower layer blower fan 50a Openings 52a, 52b Holding portion 56 Outer side enclosing plate portion 56a Slit (discontinuous portion)
57 inner surrounding plate part 57a slit (non-continuous part)
57b protrusion 60 bellmouth component member 61 bellmouth plate portion (annular plate portion)
61a Second bell mouth opening (bell mouth opening)
62 leg R1 first air passage (upper air passage)
R2 second air passage (lower air passage)

Claims (8)

1. A casing formed so that an outside air introduction port for introducing air outside the vehicle compartment is opened to the outside of the vehicle compartment,
   A motor having a motor body fixed to the lower part of the casing, and an output shaft protruding upward from the motor body;
   A vehicle air-conditioning blower provided with an air blower fan that is arranged above the motor body inside the casing away from the motor main body, and is connected to the output shaft.
   Inside the casing, there is provided a bell mouth opening which is arranged apart from the upper surface of the motor main body upward,
   The blower fan is disposed above the bell mouth opening,
   The vehicle air-conditioning blower, wherein an enclosing plate portion that extends so as to surround the output shaft is formed on an upper surface of the motor body so as to reach above the bell mouth opening portion.
2. The vehicle air-conditioning blower according to claim 1,
   A vehicle air-conditioning blower, wherein a plurality of the enclosing plate portions are formed on the upper surface of the motor main body at intervals in the radial direction of the output shaft.
3. The vehicle air-conditioning blower according to claim 1,
   A blower for vehicle air conditioning, wherein the surrounding plate portion is provided with a discontinuous portion in the circumferential direction of the output shaft.
4. The vehicle air-conditioning blower according to claim 1,
   The air conditioner blower according to claim 1, wherein an upper surface of the motor body is formed so as to be positioned higher as it approaches the output shaft.
5. The vehicle air-conditioning blower according to claim 4,
   A blower for vehicle air conditioning, characterized in that a projection portion is formed at a peripheral edge portion of the output shaft in the surrounding plate portion so as to project radially outward of the output shaft.
6. The air conditioning blower for a vehicle according to claim 2,
   The enclosing plate portion includes an inner enclosing plate portion and an outer enclosing plate portion formed at a distance from the inner enclosing plate portion in a radial direction of the output shaft,
   Each of the inner surrounding plate portion and the outer surrounding plate portion is provided with a discontinuous portion in the circumferential direction of the output shaft,
   The air-conditioning blower for a vehicle, wherein the discontinuous portion of the inner enclosing plate portion and the discontinuous portion of the outer enclosing plate portion are displaced from each other in the circumferential direction of the output shaft.
7. The vehicle air-conditioning blower according to claim 1,
   An opening for inserting the output shaft is opened on the upper surface of the motor body,
   The vehicle air-conditioning blower, wherein the surrounding plate portion is located radially outward of a peripheral portion of the opening on the upper surface of the motor body.
8. The vehicle air-conditioning blower according to claim 1,
   A bellmouth component member provided upwardly away from the upper surface of the motor body,
   The bell mouth component member extends substantially horizontally, and has an annular plate portion in which the bell mouth opening is formed, and projects downward from the annular plate portion, and the output is higher than that of the surrounding plate portion on the upper surface of the motor body. And a leg portion supported on the radially outer side of the shaft,
   A blower for vehicle air conditioning, wherein a holding portion for holding the leg portion is provided on an upper surface of the motor body so as to project upward.

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