WO2019239777A1

WO2019239777A1 - Air-blowing device for vehicle air conditioning

Info

Publication number: WO2019239777A1
Application number: PCT/JP2019/019298
Authority: WO
Inventors: 伯方　俊樹; 武史田中; 米原　真司
Original assignee: 株式会社日本クライメイトシステムズ
Priority date: 2018-06-12
Filing date: 2019-05-15
Publication date: 2019-12-19
Also published as: JP2019214252A; JP7195061B2

Abstract

A partitioning plate 24 for partitioning the interior of a casing into an upper-layer air passage and a lower-layer air passage is disposed inside the casing. A water inflow part 25a, into which flows water that has infiltrated the upper-layer air passage from an outside air introduction port, is formed so as to be recessed in the partitioning plate 24.

Description

Ventilator for vehicle air conditioning

The present invention relates to a vehicle air-conditioning blower that is mounted on, for example, an automobile and blows air-conditioning air, and in particular, a structure in which a blower fan is driven by a motor disposed below the blower fan. Belongs to the technical field.

In general, an air conditioner mounted on a vehicle selects one of air in the vehicle interior (inside air) and air outside the vehicle interior (outside air) and blows it as air-conditioning air, a cooling heat exchanger and a heating heat exchanger. After the temperature is adjusted by the above, it is configured to be supplied to each part of the passenger compartment.

In recent years, as a vehicle air-conditioning blower that blows air for air conditioning, in addition to the inside air circulation mode for blowing only the inside air and the outside air introduction mode for blowing only the outside air, the inside and outside air 2 that blows both the inside air and the outside air 2. Devices that can be switched to the laminar flow mode have been put into practical use. That is, as disclosed in Patent Documents 1 to 5, the casing of the vehicle air conditioning blower is formed with an inside air introduction port and an outside air introduction port, and an upper air passage and a lower air passage. . A blower fan is provided in each of the upper air passage and the lower air passage, and these two blower fans are driven by a common motor. Further, the casing is provided with an inside / outside air switching damper for opening and closing the inside air introduction port and the outside air introduction port, the inside air circulation mode for opening only the inside air introduction port by the inside / outside air switching damper, the outside air introduction mode for opening only the outside air introduction port, The inside / outside air two-layer flow mode that opens the inside air introduction port and the outside air introduction port can be switched. Then, when the two blower fans are rotated to enter 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 When the outside air introduced from the outside air introduction port flows and the inside / outside air two-layer flow mode is set, the outside air introduced from the outside air introduction port flows into the upper air passage while the inside air introduced from the inside air introduction port into the lower air passage Flows.

In the case of the vehicle air-conditioning blower disclosed in Patent Document 4, the scroll casing that houses the blower fan is composed of an upper scroll casing and a lower scroll casing, and the upper part of the lower scroll casing is fitted to the lower part of the lower scroll casing. By combining, the upper scroll casing and the lower scroll casing are integrated.

A partition plate extending in the horizontal direction is disposed inside the scroll casing in the middle in the vertical direction, and the interior of the scroll casing is partitioned into an upper air passage and a lower air passage by this partition plate. The peripheral edge of the partition plate is sandwiched between the lower part of the upper scroll casing and the upper part of the lower scroll casing in the vertical direction.

Further, in the vehicle air conditioning blower disclosed in Patent Document 5, the scroll casing includes an upper scroll casing and a lower scroll casing, and a notch is formed on the upper side of the inner wall surface of the lower scroll casing. The cooling air passage of the motor and the inner space of the lower scroll casing communicate with each other through the notch, and the air flowing through the inner space of the lower scroll casing is taken into the cooling air passage as the cooling air of the motor. Yes.

JP 2000-296710 A JP 2001-206044 A JP 2011-201501 A Japanese Patent Laying-Open No. 2015-67260 Japanese Patent No. 3823480

By the way, rain water and water during car wash may enter the inside of the scroll casing from the outside air inlet. In the case of a vehicle air-conditioning blower that can be switched to an internal / external air two-layer flow mode, a partition plate that partitions the upper air passage and the lower air passage is disposed in the middle portion in the vertical direction, so scrolling from the outside air inlet The water that has entered the inside of the casing drops on the upper surface of the partition plate. In particular, when the blower fan rotates at a high speed, the air flows vigorously in the upper air passage, and the water on the upper surface of the partition plate may move due to the air flow in the upper air passage and enter the motor. If water enters the motor, it may cause motor failure.

The present invention has been made in view of the above point, and the object of the present invention is to provide a scroll casing from an outside air inlet to a vehicle air-conditioning blower that can be switched to a two-layer flow mode. This is to prevent the water that has entered the interior of the motor from entering the motor due to the flow of air.

In order to achieve the above object, in the present invention, the water inflow portion is formed in the partition plate that partitions the upper air passage and the lower air passage, so that the water that has entered the upper air passage from the outside air inlet is temporarily applied to the partition plate. I was able to accumulate.

According to a first aspect of the present invention, there is provided a casing formed so that an inside air introduction port for introducing air inside a vehicle compartment and an outside air introduction port for introducing air outside the vehicle compartment are opened to the outside, and an intermediate in the vertical direction inside the casing. A partition plate that divides the interior of the casing into an upper air passage and a lower air passage communicating with both the inside air introduction port and the outside air introduction port, and the inside of the casing. An inside / outside air switching damper that opens and closes the inside air introduction port and the outside air introduction port, an upper air blowing fan that is disposed in the upper air passage so that a rotation center line extends in the vertical direction, and a rotation center line in the lower air passage A fan for lower layer ventilation arranged so as to extend in the vertical direction, and a motor for rotationally driving the fan for upper layer blowing and the fan for lower layer blowing, and the upper layer fan by the upper layer blowing fan. In the vehicle air-conditioning blower configured to blow the air in the air passage as air-conditioning air and blow the air in the lower-layer air passage as air-conditioning air by the lower-layer blowing fan, the partition plate includes The water inflow portion into which the water that has entered the upper air passage flows from the outside air inlet is formed to be recessed.

According to this configuration, when the inside air introduction port is opened by the operation of the inside / outside air switching damper and the outside air introduction port is closed, the inside air circulation mode in which the inside air is introduced from the inside air introduction port is set. In the inside air circulation mode, the upper layer blowing fan and the lower layer blowing fan rotate, so that the inside air introduced from the inside air introduction port flows through the upper layer air passage and the lower layer air passage and is blown as air for air conditioning. Further, when the inside air introduction port is closed and the outside air introduction port is opened by the operation of the inside / outside air switching damper, the outside air introduction mode in which outside air is introduced from the outside air introduction port is set. In the outside air introduction mode, the upper layer blowing fan and the lower layer blowing fan rotate, so that the outside air introduced from the outside air inlet flows through the upper layer air passage and the lower layer air passage and is blown as air for air conditioning. Further, when the inside air / outside air inlet and the outside air inlet are opened by the operation of the inside / outside air switching damper, the inside / outside air two-layer flow mode is set, and the upper layer blowing fan and the lower layer blowing fan rotate to be introduced from the outside air introduction port. The outside air flows through one of the upper air passage and the lower air passage, and the inside air introduced from the inside air inlet flows through the other and is blown as air for air conditioning.

In the outside air introduction mode and the inside / outside air two-layer flow mode, the outside air introduction port is opened by the inside / outside air switching damper, so that rainwater or water during car washing may enter the upper air passage of the casing from the outside air introduction port. The water that has entered the upper air passage is dripped onto the upper surface of the partition plate. Since the water inflow portion is formed in the partition plate, the water dropped on the upper surface of the partition plate flows into the water inflow portion and is temporarily stored. Since the water inflow portion is formed to be recessed, the water that has flowed into the water inflow portion is less likely to move to the outside of the water inflow portion due to the air flow in the upper air passage. Therefore, the water that has entered the upper air passage of the casing from the outside air inlet is prevented from entering the motor.

In a second aspect based on the first aspect, the casing is provided with a cooling air passage for supplying cooling air to the motor, and an upstream end of the cooling air passage communicates with the upper air passage. It is characterized by.

According to this configuration, since the cooling air passage for supplying the cooling air to the motor communicates with the upper air passage, the air flowing through the upper air passage is supplied to the motor. During heating, in the inside / outside air two-layer flow mode, outside air is introduced into the upper air passage, and the outside air is at a lower temperature than the inside air. Therefore, since the low-temperature cooling air is supplied to the motor, the cooling performance of the motor is enhanced.

In addition, since the cooling air passage communicates with the upper air passage, for example, when water accumulates in the lower air passage, the water in the lower air passage does not flow into the motor and water enters the motor. Is suppressed.

The third invention is characterized in that, in the second invention, an upstream end of the cooling air passage is opened in a side wall portion of the casing.

According to this configuration, when water enters the upper air passage, the upstream end of the cooling air passage is opened in the side wall portion, so that the water in the upper air passage hardly flows into the cooling air passage. .

The fourth invention is characterized in that, in the third invention, the partition plate is provided with a lower vertical plate portion covering a lower portion of the opening at the upstream end of the cooling air passage.

According to this configuration, when water enters the upper air passage, the water flow in the upper air passage is blocked by the lower vertical plate portion, and is difficult to flow toward the opening at the upstream end of the cooling air passage. Become.

In a fifth aspect based on the fourth aspect, the partition plate has an extending portion extending toward the inside of the cooling air passage, and the water inflow portion is formed in the extending portion. It is characterized by that.

According to this configuration, when the water that has entered the upper air passage flows toward the inside of the cooling air passage by the flow of the cooling air, the water is temporarily stored in the water inflow portion inside the cooling air passage. Become.

In a sixth aspect based on the fifth aspect, the extending portion is formed with a surrounding wall portion protruding upward from the periphery of the water inflow portion and extending so as to surround the water inflow portion. And

According to this configuration, the water accumulated in the water inflow portion is prevented from coming out of the water inflow portion due to the air flow.

The seventh invention is characterized in that, in the sixth invention, the surrounding wall portion has a lower vertical plate portion covering a lower portion of the opening portion at the upstream end of the cooling air passage.

According to an eighth invention, in any one of the fifth to seventh inventions, the casing includes a lower casing member that forms the lower air passage, and the water inflow portion extends downward from the extension portion. The lower casing member is formed with an accommodating portion for accommodating the water inflow portion, and the lower surface of the water inflow portion is located inside the accommodating portion as it goes downward. It has the lower guide surface which inclines so.

According to this configuration, when the partition plate and the lower casing member are integrated, the water inflow portion of the partition plate is accommodated in the accommodating portion of the lower casing member. At this time, since the lower surface of the water inflow portion has a lower guide surface that is inclined so as to be located inside the housing portion as it goes downward, the water inflow portion is placed inside the housing portion by the lower guide surface. As a result, the assembly workability is improved.

In a ninth aspect based on the seventh aspect, the casing includes an upper casing member that forms the upper air passage, and an upper side of the surrounding wall portion protrudes toward the inside of the upper casing member. An upper guide surface for guiding the upper side of the enclosure wall portion to the inside of the upper casing member is formed on the upper side of the enclosure wall portion.

According to this configuration, when the partition plate and the upper casing member are integrated, the upper guide surface of the enclosure wall portion guides the upper side of the enclosure wall portion to the inside of the upper casing member, and the assembly work Good.

According to a tenth aspect of the invention, in any one of the first to ninth aspects, a drainage passage is formed in a lower portion of the casing, and water is allowed to flow into the drainage passage at a bottom portion of the water inflow portion. A drain hole is formed.

According to this configuration, the water once stored in the water inflow portion flows from the drain hole to the drain passage, so that water intrusion to the motor is suppressed.

According to an eleventh aspect, in the tenth aspect, a cooling air intake port that takes in cooling air to the motor is disposed below the water inflow portion, and when viewed from above and below, the drain hole and the above The cooling air intake ports are separated from each other in the horizontal direction.

This configuration makes it difficult for water dripped from the drain hole to enter the cooling air intake port, so that water intrusion to the motor is suppressed.

In a twelfth aspect based on the eleventh aspect, the bottom of the water inflow portion is formed so as to incline downward toward the direction away from the cooling air intake port, and when viewed from the vertical direction, the drain hole is , Characterized in that it is formed at the lowest part of the bottom of the water inflow part.

According to this configuration, the water in the water inflow portion flows in a direction away from the cooling air intake port due to the inclination of the bottom, and then drops from a portion away from the cooling air intake port in the horizontal direction. Therefore, the dropped water is less likely to enter the cooling air intake port.

According to the first invention, the partition plate that partitions the upper air passage from the lower air passage is formed so as to have a recessed water inflow portion into which water that has entered the upper air passage from the outside air inlet flows. It is possible to prevent water from entering the upper air passage of the casing from entering the motor and to prevent the motor from malfunctioning.

According to the second invention, since the cooling air passage is communicated with the upper air passage, the cooling performance of the motor can be further improved, and the water that has entered the lower air passage of the casing from the outside air inlet is provided. It is possible to prevent the motor from malfunctioning by suppressing intrusion into the motor.

According to the third invention, since the upstream end of the cooling air passage is open to the side wall portion of the casing, if water enters the upper air passage, the water in the upper air passage becomes the cooling air passage. It becomes difficult to flow in and it is possible to prevent the motor from malfunctioning.

According to the fourth aspect of the present invention, the flow of water in the upper air passage can be blocked by the lower vertical plate portion, and it becomes difficult for water to flow toward the opening at the upstream end of the cooling air passage.

According to the fifth aspect of the present invention, the water inflow portion can be formed inside the cooling air passage. Therefore, when the water that has entered the upper air passage flows toward the inside of the cooling air passage due to the flow of the cooling air. The water can be prevented from entering the motor.

According to the sixth aspect of the invention, since the surrounding wall portion surrounding the periphery of the water inflow portion is formed, it is possible to suppress the water accumulated in the water inflow portion from exiting the water inflow portion due to the flow of air. .

According to the seventh invention, the flow of water in the upper air passage can be blocked by the lower vertical plate portion. Since the lower vertical plate portion can be a part of the surrounding wall portion, the structure can be simplified.

According to the eighth invention, when the water inflow portion of the partition plate is accommodated in the accommodating portion of the lower casing member, the water inflow portion can be guided to the inside of the accommodating portion by the lower guide surface, and the assembly workability Can be improved.

According to the ninth aspect of the invention, the upper side of the enclosure wall can be guided to the inside of the upper casing member, and the assembly workability can be improved.

According to the tenth aspect, since the drain hole communicating with the drainage passage is formed at the bottom of the water inflow portion, the water once stored in the water inflow portion can be drained from the drainage passage.

According to the eleventh aspect, since the drain hole and the cooling air intake port are separated from each other in the horizontal direction, water dripped from the drain hole can be made difficult to enter the cooling air intake port.

According to the twelfth invention, the bottom of the water inflow portion is formed so as to incline downward toward the direction away from the cooling air intake port, and the drainage hole is formed at the lowest portion of the bottom of the water inflow portion. Further, water dripped from the drain hole can be further prevented from entering the cooling air intake port.

It is the perspective view which looked at the air blower for vehicle air conditioning which concerns on Embodiment 1 of this invention from the vehicle rear side. It is a left view of the ventilation apparatus for vehicle air conditioning. It is a bottom view of the air blower for vehicle air conditioning. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. It is a disassembled perspective view of a scroll casing. It is a top view of the scroll casing which removed the upper casing member. It is sectional drawing of the scroll casing equivalent to the AA line in FIG. It is sectional drawing of the scroll casing equivalent to the BB line in FIG. It is a top view of the scroll casing which removed the upper casing member and the partition plate. It is the perspective view which looked at the partition plate from the upper part. It is a top view of a partition plate. It is the figure which looked at the partition plate from the vehicle rear side. It is a bottom view of a partition plate. It is the perspective view which looked at the partition plate from the downward direction. It is the perspective view which looked at the fan for ventilation from the upper part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

1 is a view of a vehicle air-conditioning blower 1 according to an embodiment of the present invention as seen from the rear side of the vehicle, FIG. 2 is a view of the vehicle air-conditioning blower 1 as seen from the left side, and FIG. It is the figure which looked at the air blower 1 for vehicle air conditioning from the downward direction. The vehicle air-conditioning blower 1 is disposed, 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 apparatus is a conventionally known apparatus including a compressor, a condenser, an expansion valve, and an evaporator. The compressor may be driven by a vehicle engine or an electric motor. May be. The vehicle air conditioner includes a vehicle air conditioner blower 1, a refrigeration cycle apparatus, and an air conditioning control device (not shown) that controls the air conditioning unit.

The air conditioning unit includes, for example, a cooling heat exchanger composed of an evaporator of a refrigeration cycle, a heating heat exchanger composed of a heater core, an air mix damper, a blowing direction switching damper, and an air conditioning casing that accommodates these. Yes. The air-conditioning air blown from the vehicle air-conditioning blower 1 is introduced into the inside of the air-conditioning casing and passes through the cooling heat exchanger and the heating heat exchanger to be conditioned air at a desired temperature. It is supplied to each part of the passenger compartment according to the blowing mode set by the switching damper. The temperature of the conditioned air is adjusted by 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, a heat outlet (also referred to as a foot outlet), etc., and are individually opened and closed by an outlet direction switching damper to change the outlet mode. It can be switched. Generally, the defrost outlet is opened upward and the heat outlet is opened downward. The defrost outlet is an opening for supplying conditioned air to the inner surface of the front window glass. The heat outlet is an opening for supplying conditioned air mainly to the vicinity of the passenger's feet, 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”. This is only defined for convenience of explanation, and does not limit the actual use state, installation state, and assembly state.

The vehicle air-conditioning blower 1 is housed together with an air-conditioning unit inside an instrument panel provided at a front end portion of a vehicle interior (not shown). The air-conditioning unit is disposed at a substantially central portion in the left-right direction inside the instrument panel, while the vehicle air-conditioning blower 1 is located on the passenger seat 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 vehicle, it is arranged on the right side). In this embodiment, the case where the vehicle air-conditioning blower 1 is disposed on the right side of the vehicle will be described. However, when the vehicle air-conditioning blower 1 is disposed on the left side of the vehicle, the structure of this embodiment may be symmetrical. Detailed description is omitted. Further, the position of the vehicle air-conditioning blower 1 is not particularly limited, and can be set as appropriate according to the layout requirements of the vehicle.

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

(Configuration of the vehicle air-conditioning blower 1)
As shown in FIGS. 1 to 4, the 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. A second internal / external air switching damper 7, an air filter 8, and an internal / external 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 accommodated in the blowing casing 2.

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

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

As shown in FIG. 4, the filter 8 is accommodated below the front inside air introduction port 2a, the rear inside air introduction port 2b, and the outside air introduction port 2c inside the blower casing 2. The filter 8 is formed in a plate shape and is disposed so as to extend in the horizontal direction. The peripheral portion of the filter 8 is supported by a filter support portion 2 e provided inside the blower casing 2. A filter insertion hole 2 f 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 2 f is closed by a lid portion 8 a provided at the rear end portion of the filter 8. In addition, the filter 8 can be comprised with a general nonwoven fabric etc., for example.

A partition wall 2g is provided above the filter 8 inside the blower casing 2. The partition wall 2g extends in the vertical direction, and is slightly inclined so as to be positioned closer to the lower end. A first air passage R1 is formed at the front side of the partition wall portion 2g, and a second air passage R2 is formed at the rear side of the partition wall portion 2g. The width in the front-rear direction of the first air passage R1 is set wider than the width in the front-rear direction 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. It has become.

The upstream end (upper end) of the first air passage R1 communicates with the front inside air inlet 2a and the outside air inlet 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 introduction port 2c, but the inside air introduction port communicates with different inside

air introduction ports

2a and 2b. Thereby, it becomes a structure which can introduce | transduce internal air and external air into both 1st air path R1 and 2nd air path R2.

The first inside / outside air switching damper 6 is disposed in front of the partition wall portion 2g inside the blower casing 2, and includes a closing plate portion 6a, a shaft portion 6b, and an end plate portion 6c. The blocking plate portion 6a extends in the left-right direction. The shaft portion 6b also extends in the left-right direction, and is supported so as to be rotatable with respect to the left and right side walls of the blower casing 2. The end plate portion 6c is provided in the vicinity of both ends in the left-right direction of the shaft portion 6b. The end plate portion 6c extends in the radial direction from the shaft portion 6b and continues to both 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. The first inside / outside air switching damper 6 is rotated around the center line of the shaft portion 6b, thereby switching between a state rotated toward the front as shown in FIG. 4 and a state rotated toward the rear although not shown. It is done. When the first inside / outside air switching damper 6 is rotated forward, the front inside air introduction port 2a is closed and the outside air introduction port 2c is opened, so that the inflow of inside air is blocked and the outside air is the first air. It is introduced upstream of the passage R1. On the other hand, when the first inside / outside air switching damper 6 is rotated backward, the front inside air introduction port 2a is opened and the outside air introduction port 2c is closed, so that the flow of outside air is blocked and the inside air is the first. It is introduced upstream of the air passage R1.

The second inside / outside air switching damper 7 is disposed on the rear side of the partition wall 2g inside the blower casing 2, and similarly to the first inside / outside air switching damper 6, the closing plate portion 7a, 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 to switch between a state where the second inside / outside air switching damper 7 is rotated backward as shown in FIG. It is done. When the second inside / outside air switching damper 7 is rotated backward, 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. It is introduced in the upstream part. On the other hand, when the second inside / outside air switching damper 7 is rotated 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 is second. It is introduced upstream 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 an inside / outside air switching actuator 9 shown in FIGS. Although not shown, the inside / outside air switching actuator 9 is controlled by an air conditioning control device. A link member 9 a is engaged with the shaft portion 6 b of the first inside / outside air switching damper 6 and the shaft portion 7 b of the second inside / outside air switching damper 7, and the link member 9 a 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 well-known technique 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 is omitted. Alternatively, 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 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 backward, and the first inside / outside air switching damper. The internal air circulation mode in which the second internal / external air switching damper 7 is rotated forward and the first internal / external air switching damper 6 is rotated forward and the second internal / external air switching is performed. Of the three modes, the inside / outside air two-layer flow mode in which the damper 7 is rotated forward, the mode can be switched to an arbitrary mode.

In the outside air introduction mode, since the first inside / outside air switching damper 6 is rotated forward and the second inside / outside air switching damper 7 is rotated backward, the first air passage R1 and the second air passage R2 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 becomes outside air. On the other hand, in the inside air circulation mode, the first inside / outside air switching damper 6 rotates backward and the second inside / outside air switching damper 7 rotates forward, so that the first air passage R1 and the second air passage R2 are rotated. Only shyness is introduced. 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 internal / external air two-layer flow mode, the first internal / external air switching damper 6 rotates forward and the second internal / external air switching damper 7 rotates forward, so that the external air is in the first air passage R1. The inside 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 simultaneously introduced into the blower casing 2, and can also be simply referred to as a 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 conventionally known automatic air conditioner control. By setting the inside / outside air two-layer flow mode, in winter, relatively dry outside air is supplied to the defrost outlet, and the windshield glass is well cleared, while relatively warm inside air is supplied to the heat outlet. Heating efficiency can be improved. Therefore, it is possible to achieve both improvement in heating capacity and improvement in antifogging properties.

A scroll casing 20 in which the blower fan 3 is accommodated is provided below the

inside air inlets

2a, 2b and the outside air inlet 2c of the blower casing 2. As shown in FIGS. 1 and 2, the scroll casing 20 includes an upper scroll casing member 21 in which an upper layer blowing fan 30 is accommodated, a lower scroll casing member 22 in which a lower layer blowing fan 31 is accommodated, and a bottom wall. It is divided into members 23. As shown in FIG. 4, a partition plate 24 for partitioning the inside of the scroll casing 20 into a first air passage R 1 and a second air passage R 2 is disposed at an intermediate portion in the vertical direction inside the scroll casing 20. ing. The inside of the scroll casing 20 is partitioned up and down by a partition plate 24, a first air passage R 1 is formed above the partition plate 24, and a second air passage R 2 is formed below the partition plate 24. Therefore, the first air passage R1 that is located above the partition plate 24 can be referred to as an upper air passage, and the second air passage R2 that is located below the partition plate 24 is referred to as a lower layer. It can be called an air passage.

When the lower part of the upper scroll casing member 21 and the upper part of the lower scroll casing member 22 are fitted, the upper scroll casing member 21 and the lower scroll casing member 22 are integrated. Further, the lower scroll casing member 22 and the bottom wall member 23 are fitted together, so that the lower scroll casing member 22 and the bottom wall member 23 are integrated.

As shown in FIG. 15, the blower fan 3 includes an upper layer blower fan 30 and a lower layer blower fan 31. The upper layer blowing fan 30 and the lower layer blowing fan 31 are integrated and rotated by a common motor 5. As shown in FIG. 4, the upper layer blowing fan 30 is disposed in the first air passage R 1 with the rotation center line extending in the vertical direction. The lower layer blower fan 31 is disposed in the second air passage R2 with the rotation center line extending in the vertical direction.

A substantially circular first bell mouth opening (upper bell mouth opening) 21 a 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 disposed so as to face the lower surface of the filter 8. The upper layer blowing fan 30 is positioned directly below the first bell mouth opening 21 a, and therefore the first bell mouth opening 21 a is also opposed to the upper side of the upper layer blowing fan 30. The upper side of the upper layer blowing fan 30 is an air suction side, and air is sucked from the upper side of the upper layer blowing fan 30.

The upper wall portion of the upper scroll casing member 21 is provided with a protruding wall portion 21b that protrudes upward. The protruding wall 21b is positioned behind the opening edge of the first bell mouth opening 21a and extends in the left-right direction. The upper end portion of the protruding wall portion 21b reaches the vicinity of the lower end portion 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 located 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 first air passage R1 communicates with the inside of the upper scroll casing member 21 through 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 a downstream portion of the first air passage R1. The upper layer blower fan 30 is disposed in the first air passage R 1 inside the upper scroll casing member 21. When the upper layer blowing fan 30 rotates inside the upper scroll casing member 21, the air in the first air passage R1 is blown by the upper layer blowing fan 30 as air conditioning air. That is, the upper layer blower fan 30 is a member for forming an air flow 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 blowing fan 30 is inserted from the second air passage R2 toward the first air passage R1. The diameter of the through hole 24 a is larger than the outer diameter of the upper layer blower fan 30. Thereby, it becomes possible to easily insert the upper layer blowing fan 30 into the through hole 24a.

As shown in FIG. 2, an upper air outlet 21 c connected to the air conditioning unit is formed on the front side of the left side wall portion of the upper scroll casing member 21. 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 of the upper scroll casing member 21 from the upper air outlet 21c. Yes.

As shown in FIG. 4, the second air passage R 2 extends downward in the rear side of the upper scroll casing member 21, and the lower portion of the second air passage R 2 reaches the bottom wall member 23. Yes. The lower wall portion of the lower scroll casing member 22 is spaced upward from the bottom wall member 23, and the lower side of the second air passage R2 is interposed between the lower wall portion of the lower scroll casing member 22 and the bottom wall member 23. The part is located.

4 and 5, a bell mouth constituent member 60 is provided inside the scroll casing 20. The bell mouth constituent member 60 is a member constituting the vehicle air-conditioning blower 1, and is constituted by a member different from the scroll casing 20. The bell mouth constituent member 60 is formed with a second bell mouth opening (lower bell mouth opening) 61 a disposed so as to face the lower side of the blower fan 3 and in the radial direction of the blower fan 3. It has a bell mouth plate portion 61 that extends and a plurality of leg portions (wind shield portions) 62. The bell mouth plate part 61 and the leg part 62 are made of a resin material and are integrally formed.

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 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 61 has the second bell mouth opening 61a, the inner edge of the bell mouth plate 61 is formed in a substantially circular shape. The outer edge portion of the bell mouth plate portion 61 is also formed to be substantially circular. The bell mouth plate 61 is formed in an annular shape as a whole, and the width of the bell mouth plate 61 is set to be substantially the same in the entire circumferential direction of the bell mouth plate 61.

The inner peripheral side of the bell mouth plate 61 is formed to be curved so as to be located closer to the second bell mouth opening 61a. The outer peripheral side of the bell mouth plate portion 61 is flatter than the curved portion, and a plurality of bell mouth drain holes 61b are spaced apart from each other in the circumferential direction. Is formed. That is, the bell mouth drain hole for draining the water on the upper surface of the bell mouth plate 61 to the lower side of the bell mouth plate 61 on the outer peripheral side of the second bell mouth opening 61 a in the bell mouth plate 61. 61 b is formed, and the formation of the bell mouth drain hole 61 b prevents water from remaining on the upper surface of the bell mouth plate portion 61. The water dripped downward from the bell mouth drain hole 61b flows into a drain passage D, which will be described later, and is drained outside 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 may be at irregular intervals. The number of bell mouth drain holes 61b is three in this embodiment, but may be one or two, or four or more. The bell mouth drain hole 61b may have a slit shape, a rectangular shape, or the like in addition to a circular shape or an elliptical shape.

The leg portion 62 extends downward from the periphery 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 part 62 is extended from the circumference | surroundings of opening of each bellmouth drain hole 61b, in this embodiment, three will be provided. The number of the leg portions 62 and the number of the bell mouth drain holes 61b may not be matched, and one may be larger than the other.

The leg portion 62 has a concave cross section that opens inward in the radial direction of the blower fan 3. As a result, the air flowing from the outside in the radial direction to the inside of the blower fan 3 during the rotation of the blower fan 3 becomes difficult to flow inward of the leg portion 62. It acts as a wind shield that suppresses the wind from reaching the periphery of the opening of the hole 61b.

The lower end portion of the leg portion 62 is in contact with the bottom surface of the scroll casing 20. In this embodiment, since the bottom surface of the scroll casing 20 is constituted by the outer peripheral portion of a cover portion 5d (described later) that covers the body portion 5b of the motor 5 from above, the lower end portion of the leg portion 62 is the bottom portion of the cover portion 5d. The outer peripheral portion comes into contact from above. Therefore, the bell mouth constituent member 60 is supported with respect to the cover portion 5d, and the height of the second bell mouth opening 61a is determined to be a desired height.

The lower part of the second air passage R2 communicates with the inside of the lower scroll casing member 22 via the second bell mouth opening 61a, and the inside of the lower scroll casing member 22 is in the second air passage R2. Part (downstream part). A portion below the partition plate 24 is a downstream portion of the second air passage R2. The lower layer blower fan 31 is disposed in the downstream portion of the second air passage R 2 inside the lower scroll casing member 22. When the lower layer blowing fan 31 rotates, the air in the second air passage R2 is blown by the lower layer blowing fan 31 as air for air conditioning. That is, the lower layer blower fan 31 is a member for forming an air flow in the lower layer.

As shown in FIG. 2, a lower air outlet 22 c connected to the air conditioning unit is formed on the front side of the left wall portion of the lower scroll casing member 22. The lower air outlet 22c is located directly below the upper air outlet 21c. The lower 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 of the lower scroll casing member 22 from the lower air outlet 22c. It has become.

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

The bottom wall member 23 is formed with a lower end opening 23a, and the motor 5 is attached via the motor attachment member 5a. A blower fan 3 is disposed above the motor 5. The motor attachment member 5 a is fixed to the bottom wall member 23. The motor 5 is attached to the motor attachment member 5a. The motor 5 includes a main body 5b incorporating a rotor and the like, a rotary shaft 5c extending in the vertical direction, and a cover 5d that covers the main body 5b from above. In a state where the motor 5 is fixed, the main body portion 5b, the rotating shaft 5c, and the cover portion 5d protrude upward from the lower end opening 23a of the bottom wall member 23. The rotating shaft 5c protrudes upward from the upper end portion of the main body 5b, passes through the cover 5d, and further protrudes upward from the cover 5d. The first bell mouth opening 21a and the second It is arranged concentrically with the bell mouth opening 61a. The upper end portion of the rotating shaft 5c is located above the second bell mouth opening 61a.

The cover portion 5d is provided with a cylindrical portion 5e surrounding the rotating shaft 5c. The cylindrical part 5e can be formed in a cylindrical shape and is arranged concentrically with the rotating shaft 5c. A plurality of arc-shaped wall portions may be provided instead of the cylindrical portion 5e. The rotating shaft 5c protrudes upward from the upper end portion of the cylindrical portion 5e.

The blower fan 3 is fixed to the rotary shaft 5c, and the blower fan 3 and the rotary shaft 5c rotate integrally. Therefore, when a voltage is applied to the main body portion 5b of the motor 5, the rotational force of the rotating shaft 5c is transmitted to the blower fan 3, and the upper layer blower fan 30 rotates in the first air passage R1, and the lower layer blower is used. The fan 31 rotates in the second air passage R2. An air conditioning control device (not shown) is connected to the main body 5b of the motor 5, and a voltage is applied by the air conditioning control device so as to achieve a desired rotation speed.

(Configuration of the blower fan 3)
As shown in FIG. 15, the blower fan 3 includes a fixed portion 33 fixed to the rotation shaft 5c of the motor 5, a cone portion 34 extending from the fixed portion 33 in the radial direction of the rotation shaft 5c, An upper layer blowing fan 30 composed of a large number of upper blades fixed to the radially outer side of the cone part 34 and a lower layer blowing fan 31 composed of a large number of lower blades fixed to the outer side of the cone part 34 in the radial direction. I have. The fixed portion 33, the cone portion 34, the upper blade, and the lower blade can be formed as an integrally molded product made of a resin material, but can also be configured by combining different members. The blower fan 3 is a centrifugal fan.

The fixed portion 33 is formed in a cylindrical shape having an insertion hole 33a into which the rotating shaft 5c of the motor 5 is inserted. The upper part of the fixed part 33 protrudes upward from the upper surface of the inner peripheral part 34 b of the cone part 34, and therefore the upper part of the fixed part 33 is positioned so as to protrude inside the cone part 34. . The insertion hole 33a of the fixed portion 33 extends in the vertical direction, and both the upper end and the lower end of the insertion hole 33a are open. The rotating shaft 5c of the motor 5 is fixed in a state of being inserted into the insertion hole 33a. Since the means for fixing the fixed portion 33 to the rotating shaft 5c of the motor 5 is conventionally the periphery, detailed description thereof will be omitted.

The cone part 34 is formed so as to be recessed downward. That is, the cone part 34 has the outer peripheral part 34a and the inner peripheral part 34b, and the outer peripheral part 34a and the inner peripheral part 34b are integrally molded. The inner peripheral portion 34 b extends radially outward from the intermediate portion in the vertical direction of the outer peripheral surface of the fixed portion 33. The inner peripheral portion 34b can be inclined or curved so as to be positioned closer to the radially outer end portion. The outer peripheral portion 34a extends upward from the radially outer end portion of the inner peripheral portion 34b, and is inclined or curved so that the closer to the upper end portion, the closer to the radially outer side. The shapes of the outer peripheral portion 34a and the inner peripheral portion 34b are merely examples, and the outer peripheral portion 34a and the inner peripheral portion 34b may be smoothly continuous, or the boundary portion between the outer peripheral portion 34a and the inner peripheral portion 34b. It may be a continuous shape so that can be clearly seen.

The outer peripheral part 34a and the inner peripheral part 34b make the shape of the cone part 34 depressed downward, for example, a shape that can also be called a saddle type or a concave type. Further, the upper end portion of the outer peripheral portion 34 a of the cone portion 34 extends outward in the radial direction, and this extended portion extends in a direction substantially orthogonal to the rotation shaft 5 c of the motor 5. Further, the lower end portion of the outer peripheral portion 34 a is the lowest portion of the cone portion 34.

The cone portion 34 is provided with a plurality of drain holes 34 c for draining water on the upper surface of the cone portion 34 to the lower side of the cone portion 34. The plurality of drain holes 34c are provided at the lower end portion of the outer peripheral portion 34a of the cone portion 34, that is, at the lowest portion of the cone portion 34, and are arranged at intervals in the circumferential direction of the rotating shaft 5c. Further, the inner peripheral portion 34b can be inclined so as to be positioned closer to the radially outer end portion, and as a result, the inner peripheral portion 34b is inclined downward toward the lower edge portion of the drain hole 34c. The water on the upper surface of the inner peripheral portion 34b is likely to flow toward the drain hole 34c.

The intervals between the drain holes 34c can be equal. Further, the drain hole 34c is located away from the upper end portion of the cylindrical portion 5e of the cover portion 5d and positioned radially outward from the cylindrical portion 5e. Accordingly, the drain hole 34c is located outside the cylindrical portion 5e in plan view.

A plurality of first ribs 35 and second ribs 36 extending in the radial direction of the rotation shaft 5 c are provided on the upper surface of the cone portion 34. The first rib 35 and the second rib 36 are connected to the outer peripheral surface of the fixed portion 33 and are also connected to the outer peripheral portion 34 a of the cone portion 34. That is, the first rib 35 and the second rib 36 are reinforcing ribs extending in the radial direction from the outer peripheral surface of the fixed portion 33 until reaching the outer peripheral portion 34a of the cone portion 34. The fixed portion 33, the outer peripheral portion 34a, Can also be referred to as connecting ribs that connect the two. The first rib 35 is higher than the second rib 36, and the radial dimension of the first rib 35 is set longer than the radial dimension of the second rib 36. Although the thickness of the first rib 35 and the second rib 36 can be equal, the thickness may be different from each other. The first ribs 35 and the second ribs 36 are alternately provided in the circumferential direction of the rotation shaft 5c. The lower ends of the first rib 35 and the second rib 36 are connected to the inner peripheral part 34 b of the cone part 34. Therefore, the fixed portion 33, the inner peripheral portion 34 b of the cone portion 34, and the outer peripheral portion 34 a of the cone portion 34 are connected and integrated by the first rib 35 and the second rib 36.

The second rib 36 is disposed so as to cross the drain hole 34c. In plan view, the second rib 36 passes through the center of the opening width of the drainage hole 34c, and as a result, one drainage hole 34c is disposed across the second rib 36, The drain hole 34c is divided into two at the center of the opening width. By disposing the second rib 36 in this way, the second rib 36 can be provided at a position where the opening of the drain hole 34c is not closed. Since the first rib 35 is provided at a position away from the opening of the drain hole 34c, the first rib 35 is also a rib provided at a position where the opening of the drain hole 34c is not closed. One or both of the first rib 35 and the second rib 36 may be omitted.

The plurality of first ribs 35 are arranged at equal intervals in the circumferential direction of the rotation shaft 5c. The plurality of second ribs 36 are also arranged at equal intervals in the circumferential direction of the rotation shaft 5c. The intervals between the first ribs 35 and the second ribs 36 adjacent to each other in the circumferential direction of the rotation shaft 5c are all set equal. Thereby, the balance at the time of rotation of the fan 3 for ventilation becomes favorable.

(Motor 5 cooling structure)
The scroll casing 20 is provided with a cooling structure for the motor 5. That is, as shown in FIGS. 6 to 9 and the like, a cooling air passage S for supplying cooling air to the motor 5 is formed on the left side of the scroll casing 20 so as to extend in the vertical direction. The upper part of the cooling air passage S is an upstream part and extends upward from the partition plate 24. As shown in FIGS. 6 and 7, the upper scroll casing member 21 has a side wall portion 21 d for defining the first air passage R 1. As shown in FIG. 7, the upstream end opening S1 of the cooling air passage S is opened in the side wall portion 21d so as to face the first air passage R1. As a result, the upstream end of the cooling air passage S communicates with the first air passage R1.

As shown in FIG. 5, the left side portion of the upper scroll casing member 21 is provided with an upper concave portion 21 e formed so as to be recessed upward and opened downward. An upstream portion of the cooling air passage S is configured by the internal space of the upper concave portion 21e. A cylindrical 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 directly below the upper concave portion 21e. As for this cylindrical part 22e, the upper end part and the lower end part are open | released. The upper end portion of the cylindrical portion 22e is connected to the lower end portion of the upper concave portion 21e, and the internal space of the upper concave portion 21e communicates with the internal space of the cylindrical portion 22e. An intermediate portion in the vertical direction of the cooling air passage S is constituted by an internal space of the cylindrical portion 22e.

On the left side of the bottom wall member 23, there is provided a lower concave portion 23e formed so as to be depressed downward and opened upward. The lower concave portion 23e is formed so as to be located immediately below the cylindrical portion 22e, and the lower end portion of the cylindrical portion 22e is connected to the upper end portion of the lower concave portion 23e so that the cylindrical portion 22e The internal space communicates with the internal space of the lower concave portion 23e. The lower portion of the cooling air passage S is constituted by the internal space of the lower concave portion 23e.

As shown in FIG. 8 and the like, a bulging portion 23 f that bulges to the rear side is formed in the lower portion of the left side portion of the bottom wall member 23. The bulging portion 23f is opened downward. The internal space of the bulging portion 23f communicates with the internal space of the lower concave portion 23e, and the lower end portion (downstream end portion) of the cooling air passage S is configured by the internal space of the bulging portion 23f. That is, the cooling air passage S is constituted 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 bulging portion 23f, and becomes a long passage in the vertical direction. The lower end portion is bent rearward and opened downward.

FIG. 8 shows a part of the motor mounting member 5 a of the motor 5. The motor attachment member 5a is formed so as to reach directly below the bulging portion 23f of the bottom wall member 23. A cooling air intake port 5f for taking in cooling air to the motor 5 is formed in a portion of the motor mounting member 5a located immediately below the bulging portion 23f. The cooling air intake port 5f is connected to the internal space of the bulging portion 23f, that is, the lower end portion of the cooling air passage S. Accordingly, 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 5f. The shape of the cooling air intake port 5f is not particularly limited and can be an arbitrary shape.

(Configuration of drainage passage D)
As shown in FIG. 4, a drainage 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 out of the passenger compartment from a drain portion provided in the air conditioning unit. In addition, the drain part provided in the air conditioning unit is a part for draining the condensed water generated on the surface of the heat exchanger for cooling, and has been conventionally known. Although not shown, a drain hose or the like extending outside the vehicle compartment is connected to the drain portion.

(Configuration of partition plate 24)
As shown in FIGS. 5 to 7 and the like, the partition plate 24 is an integrally molded product of a resin material, and has an extending portion 25 that extends in the horizontal direction toward the inside of the cooling air passage S. The extending portion 25 is integrally formed with the main body portion of the partition plate 24, but may be provided as a separate member. The extending portion 25 is formed so that a water inflow portion 25a into which water that has entered the first air passage R1 flows from the outside air introduction port 2c is depressed downward, that is, bulges downward. That is, the water that has entered the first air passage R1 from the outside air introduction port 2c may accumulate on the upper surface of the partition plate 24, and the water accumulated on the upper surface of the partition plate 24 flows into the cooling air passage S by the air flow. May flow towards. This phenomenon may be particularly noticeable when the airflow is high. Since the water inflow portion 25a is recessed downward in the cooling air passage S, the water flowing toward the inside of the cooling air passage S flows into the water inflow portion 25a. Thereby, water is once stored by the water inflow part 25a.

The extending portion 25 is formed with a surrounding wall portion 25b that protrudes upward from the periphery of the water inflow portion 25a and extends so as to surround the water inflow portion 25a. The surrounding wall portion 25b is preferably continuous in the circumferential direction, but only a part may be interrupted. The upper side of the surrounding wall portion 25 b protrudes toward the inside of the upper concave portion 21 e of the upper casing member 21. On the upper side of the surrounding wall portion 25b, an upper guide surface 25e for guiding the upper side of the surrounding wall portion 25b to the inside of the upper casing member 21 is formed. For example, when the partition plate 24 and the upper casing member 21 are integrated, the upper side of the surrounding wall portion 25b is guided into the upper casing member 21 by the upper guide surface 25e of the surrounding wall portion 25b. Assembling workability is improved, and work in a short time becomes possible.

The enclosure wall portion 25b has a lower vertical plate portion 25c that covers the lower portion of the upstream end opening S1 (shown in FIG. 7) of the cooling air passage S. As shown in FIG. 10, the lower vertical plate portion 25c extends in the left-right direction and also in the vertical direction. The lower vertical plate portion 25c can be a part of the surrounding wall portion 25b, or the lower vertical plate portion 25c can be formed separately from the surrounding wall portion 25b. The height of the lower vertical plate portion 25c and the height of the surrounding wall portion 25b may be the same, or one may be higher than the other.

The horizontal dimension of the lower vertical plate portion 25c substantially matches the horizontal dimension of the upstream end opening S1 of the cooling air passage S. Further, the lower end portion of the lower vertical plate portion 25c coincides with the lower end portion of the upstream end opening S1 of the cooling air passage S. Further, the upper end portion of the lower vertical plate portion 25c is located at the middle portion in the vertical direction of the upstream end opening S1 of the cooling air passage S. As a result, the substantially lower half of the upstream end opening S1 of the cooling air passage S can be covered by the lower vertical plate portion 25c, so that the water in the first air passage R1 flows into the cooling air passage S, ie, the It is difficult to flow toward the exit 25 side.

As shown in FIG. 7, since the water inflow portion 25 a is formed so as to bulge downward, the upper portion of the cylindrical portion 22 e of the lower casing member 22 in a state assembled to the lower casing member 22. Is housed in. Accordingly, the cylindrical portion 22e of the lower casing member 22 serves as a housing portion that houses the water inflow portion 25a. The lower surface of the water inflow portion 25a has a lower guide surface 25d that is inclined so as to be located radially inward of the cylindrical portion 22e as it goes downward. For example, when the partition plate 24 is assembled to the lower casing member 22 and the partition plate 24 and the lower casing member 22 are integrated, the water inflow portion 25a of the partition plate 24 is replaced with the cylindrical portion of the lower casing member 22. Since the lower surface of the water inflow portion 25a has a lower guide surface 25d that is inclined so as to be located radially inward of the tubular portion 22e as it goes downward, The water inflow portion 25a is guided to the inside of the cylindrical portion 22e by the side guide surface 25d, and the assembling workability is improved.

A drain hole 25g for allowing water to flow into the drainage passage D is formed in the bottom 25f of the water inflow portion 25a. The drain hole 25g is formed so as to penetrate the bottom part 25f in the vertical direction, and water once stored in the bottom part 25f of the water inflow part 25a is dripped downward from the drain hole 25g. The water dripped downward from the drain hole 25g flows into the drain passage D from the bell mouth drain hole 61b, for example. A passage for allowing the water dropped from the drain hole 25g to flow into the drain passage D may be provided in the scroll casing 20.

As described above, the cooling air intake port 5f (shown in FIG. 8) for taking in cooling air to the motor 5 is disposed below the water inflow portion 25a. In FIG. 6, the cooling air intake port 5f is indicated by a broken line. When viewed from above and below, the drain hole 25g of the water inflow portion 25a and the cooling air intake port 5f are separated from each other in the horizontal direction. In this embodiment, as shown in FIG. 6, the drain hole 25g of the water inflow portion 25a is located in front of the cooling air intake port 5f and on the right side of the cooling air intake port 5f. As a result, the drainage hole 25g of the water inflow portion 25a and the cooling air intake port 5f can be sufficiently separated in the horizontal direction, so that water dripped from the drainage hole 25g of the water inflow portion 25a is cooled by the cooling air intake port 5f. It becomes difficult to enter.

Further, as shown in FIG. 7, the bottom 25f of the water inflow portion 25a is located below the upstream end opening S1 of the cooling air passage S. The bottom portion 25f of the water inflow portion 25a is formed to be inclined downward in a direction away from the cooling air intake port 5f. And as shown in FIG. 7, the drain hole 25g is formed in the lowest part in the bottom part 25f of the water inflow part 25a. Thereby, the water in the water inflow portion 25a flows in a direction away from the cooling air intake port 5f due to the inclination of the bottom portion 25f, and then drops from a portion away from the cooling air intake port 5f in the horizontal direction. Therefore, the dropped water is less likely to enter the cooling air intake port 5f.

Two or more drain holes 25g may be formed. The shape of the drain hole 25g is not limited to a circular shape, and may be, for example, a slit shape. The position where the drain hole 25g is formed is not limited to the illustrated position, and can be any position.

(Effect of embodiment)
As described above, according to the vehicle air-conditioning blower 1 according to this embodiment, when the inside

air introduction ports

2a and 2b are opened and the outside air introduction port 2c is closed by the operation of the inside and outside

air switching dampers

6 and 7, 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 upper layer blowing fan 30 and the lower layer blowing fan 31 rotate, so that 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 for air conditioning. Blown as air. Further, when the inside

air introduction ports

2a and 2b are closed and the outside air introduction port 2c is opened by the operation of the inside and outside

air switching dampers

6 and 7, the outside air introduction mode in which outside air is introduced from the outside air introduction port 2c is set. In the outside air introduction mode, the first air passage R1 and the second air passage R2 rotate, so that the outside air introduced from the outside air introduction port 2c flows through the first air passage R1 and the second air passage R2 as air conditioning air. Be blown. Further, when the inside

air introduction ports

2a, 2b and the outside air introduction port 2c are opened by the operation of the inside / outside

air switching dampers

6, 7, 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. Thus, both air is blown as air for air conditioning.

In the outside air introduction mode and the inside / outside air two-layer flow mode, the outside air introduction port 2c is opened by the inside / outside

air switching dampers

6 and 7, so that rain water or water during car washing flows from the outside air introduction port 2c to the first air passage R1 of the blower casing 2. May invade. The water that has entered the first air passage R1 drops on the upper surface of the partition plate 24. Since the water inflow portion 25a is formed in the partition plate 24, the water dropped on the upper surface of the partition plate 24 flows into the water inflow portion 25a and is temporarily stored. Since the water inflow portion 25a is formed to be recessed, the water that has flowed into the water inflow portion 25a is less likely to move to the outside of the water inflow portion 25a due to the air flow in the first air passage R1. Therefore, the water that has entered the first air passage R1 of the blower casing 2 from the outside air inlet 2c is prevented from entering the motor 5.

Further, since the cooling air passage S for supplying the cooling air to the motor 5 communicates with the first air passage R1, the air flowing through the first air passage R1 is supplied to the motor 5. During heating, in the inside / outside air two-layer flow mode, outside air is introduced into the first air passage R1, and the outside air is at a lower temperature than the inside air. Therefore, since the low-temperature cooling air is supplied to the motor 5, the cooling performance of the motor 5 is enhanced.

Further, since the cooling air passage S communicates with the first air passage R1, for example, when water accumulates in the first air passage R1, water in the first air passage R1 flows into the motor 5. And the ingress of water into the motor 5 is suppressed.

The above-described embodiments are merely examples in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

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.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioning blower 2

Blower casing

2a, 2b Inside air introduction port 2c Outside air introduction port 5 Motor 5f Cooling air intake port 6 First inside / outside air switching damper 7 Second inside / outside air switching damper 20 Scroll casing 21 Upper casing member 22 Lower side Casing member 24 Partition plate 25 Extension portion 25a Water inflow portion 25b Enclosure wall portion 25c Lower vertical plate portion 25e Upper guide surface

25f Bottom portion

25g Drain hole 30 Upper layer fan 31 Lower layer fan D Drain passage R1 First air passage (Upper air passage)
R2 Second air passage (lower air passage)
S Cooling air passage

Claims

A casing formed so that an inside air introduction port for introducing air inside the vehicle interior and an outside air introduction port for introducing air outside the vehicle compartment are opened to the outside;
A partition plate disposed in an intermediate portion in the vertical direction inside the casing, and partitioning the inside of the casing into an upper air passage and a lower air passage communicating with both the inside air introduction port and the outside air introduction port;
An inside / outside air switching damper disposed inside the casing and opening and closing the inside air introduction port and the outside air introduction port;
An upper air blowing fan disposed in the upper air passage so that a rotation center line extends in the vertical direction;
A lower layer blower fan disposed in the lower layer air passage so that the rotation center line extends in the vertical direction;
A motor for rotationally driving the upper layer blowing fan and the lower layer blowing fan,
The vehicle air conditioning fan configured to blow air in the upper air passage as air conditioning air by the upper air blowing fan and to blow air in the lower air passage as air conditioning air by the lower air blowing fan. In the device
A blower for vehicle air conditioning, wherein the partition plate is formed to have a recessed water inflow portion into which water that has entered the upper air passage from the outside air introduction port flows.
The blower for vehicle air conditioning according to claim 1,
A cooling air passage for supplying cooling air to the motor is formed in the casing,
An air blower for vehicle air conditioning, wherein an upstream end of the cooling air passage communicates with the upper air passage.
The blower for vehicle air conditioning according to claim 2,
An air blower for vehicle air conditioning, wherein an upstream end of the cooling air passage is opened in a side wall portion of the casing.
The blower for vehicle air conditioning according to claim 3,
A blower for vehicle air conditioning, wherein the partition plate is provided with a lower vertical plate portion that covers a lower portion of the opening at the upstream end of the cooling air passage.
The vehicle air conditioner blower according to claim 4,
The partition plate has an extending portion extending toward the inside of the cooling air passage,
A blower for vehicle air conditioning, wherein the water inflow portion is formed in the extension portion.
In the vehicle air conditioner blower according to claim 5,
An air blower for vehicle air conditioning, wherein the extending portion is formed with a surrounding wall portion that protrudes upward from the periphery of the water inflow portion so as to surround the water inflow portion.
The blower for vehicle air conditioning according to claim 6,
The vehicle air-conditioning blower according to claim 1, wherein the surrounding wall portion includes a lower vertical plate portion that covers a lower portion of the opening at the upstream end of the cooling air passage.
The vehicle air-conditioning blower according to any one of claims 5 to 7,
The casing has a lower casing member that forms the lower air passage,
The water inflow part is formed to bulge downward from the extension part,
The lower casing member is formed with an accommodating portion for accommodating the water inflow portion,
The blower for vehicle air conditioning, wherein the lower surface of the water inflow portion has a lower guide surface that is inclined so as to be located inside the housing portion as it goes downward.
In the vehicle air-conditioning blower according to claim 7,
The casing has an upper casing member that forms the upper air passage,
The upper side of the surrounding wall portion protrudes toward the inside of the upper casing member, and an upper guide surface that guides the upper side of the surrounding wall portion to the inside of the upper casing member is formed above the surrounding wall portion. An air blower for vehicle air conditioning characterized by being formed.
In the air blower for vehicle air conditioning as described in any one of Claim 1 to 9,
In the lower part of the casing, a drainage passage is formed,
A blower for vehicle air conditioning, wherein a drainage hole for allowing water to flow into the drainage passage is formed at the bottom of the water inflow portion.
The blower for vehicle air conditioning according to claim 10,
Below the water inflow portion, a cooling air intake port that takes in cooling air to the motor is arranged,
The vehicle air conditioning blower characterized in that the drain hole and the cooling air intake port are separated from each other in the horizontal direction when viewed from above and below.
In the air blower for vehicle air conditioning according to claim 11,
The bottom of the water inflow portion is formed so as to incline downward toward the direction away from the cooling air intake port,
The vehicle air-conditioning blower according to claim 1, wherein the drain hole is formed at a lowest portion of the bottom of the water inflow portion when viewed in the vertical direction.