JP6979911B2 - Blower for vehicle air conditioning - Google Patents

Description

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

Generally, an air conditioner mounted on a vehicle selects one of the air inside the vehicle (inside air) and the air outside the vehicle (outside air) and blows it as air conditioning air, and heat exchangers for cooling and heat exchangers for heating. After adjusting the temperature, it is configured to supply to each part of the passenger compartment.

In recent years, as a vehicle air-conditioning blower for blowing air-conditioning air, in addition to the inside air circulation mode in which only the inside air is blown and the outside air introduction mode in which only the outside air is blown, the inside / outside air 2 which blows both the inside air and the 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 Documents 1 to 4, the casing of the vehicle air-conditioning blower has an inside air introduction port and an outside air introduction port, and an upper air passage and a lower air passage are formed. .. Blower fans are provided inside the upper air passage and the lower air passage, respectively, and these two blow fans are driven by a common motor. In addition, the casing is provided with an inside / outside air switching damper that opens and closes the inside air introduction port and the outside air introduction port. It is possible to switch between the inside and outside air two-layer flow mode that opens the inside air introduction port and the outside air introduction port. Then, when the above two blower fans are rotated to set 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 air, and when 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 blower for vehicle air conditioning of Patent Document 4, the scroll casing accommodating the blower fan is composed of an upper scroll casing and a lower scroll casing, and the upper part of the lower scroll casing fits into the lower part of the lower scroll casing. By combining, the upper scroll casing and the lower scroll casing are integrated.

Inside the scroll casing, a partition plate extending in the horizontal direction is disposed in the middle portion in the vertical direction, and the inside of the scroll casing is divided into an upper air passage and a lower air passage by the 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.

Japanese Unexamined Patent Publication No. 2000-296710 Japanese Unexamined Patent Publication No. 2001-206044 Japanese Unexamined Patent Publication No. 2011-201501 Japanese Unexamined Patent Publication No. 2015-67260

By the way, the blower fan has a part called a cone part formed so as to extend from a fixed part fixed to the rotating shaft of the motor to the surrounding blades, and the shape is such that the cone part is recessed downward. May be done. That is, if the rotation axis of the motor becomes long, it becomes difficult to secure stability during rotation, so there is a demand for shortening the rotation axis. I need to bring it. On the other hand, since the position of the blade is determined by the position of the scroll casing, in order to shorten the rotation axis of the motor, the central part of the cone part is formed so as to be located below the outer peripheral part. It is necessary to position the fixed part at the bottom.

However, when the cone portion is shaped to be recessed downward in this way, for example, when rainwater or water from car washing enters the inside of the scroll casing from the outside air inlet, the upper surface of the cone portion becomes concave. Therefore, it may collect on the upper surface, and this water may cause a problem.

Therefore, it is conceivable to provide a drain hole in the cone portion, but if the drain hole is provided, the rigidity of the cone portion is lowered, and as a result, deformation or breakage of the blade may occur.

The present invention has been made in view of this point, and an object thereof is to prevent the occurrence of defects by preventing water from accumulating in the cone portion and to secure rigidity while deforming the blades. And to prevent breakage.

In order to achieve the above object, in the present invention, a drain hole is provided in the cone portion so that the water collected on the upper surface of the cone portion is drained to the lower side of the cone portion and the drainage from the cone portion is inhibited. A rib extending in the radial direction was provided so as not to prevent it.

In the first invention, an inside air introduction port for introducing air inside the vehicle interior and an outside air introduction port for introducing air outside the vehicle interior are formed, and an inside / outside air switching damper that opens and closes the inside air introduction port and the outside air introduction port is provided. In a vehicle air-conditioning blower having a housing, a blower fan arranged inside the casing, and a motor having a rotating shaft extending in the vertical direction, the blower fan is placed above the motor. The blower fan is arranged, and the fixed portion fixed to the rotating shaft, a cone portion extending radially from the fixed portion of the rotating shaft, and blades fixed to the radially outer side of the cone portion. The cone portion is formed so as to be recessed downward, and has a plurality of drain holes for draining water on the upper surface of the cone portion to the lower side of the cone portion. A rib extending in the radial direction is provided at a position where the opening of the drain hole is not closed.

According to this configuration, for example, when rainwater or water at the time of car washing infiltrates into the inside of the casing from the outside air inlet and reaches the upper surface of the cone portion, a drain hole is formed in the cone portion. It is drained below. At this time, since the opening of the drain hole is not blocked by the rib, it is difficult for water to remain accumulated on the upper surface of the cone portion.

Further, since the rib inside the cone portion extends in the radial direction, the cone portion having a shape recessed downward is reinforced by the rib to ensure the rigidity of the cone portion.

The second invention is characterized in that, in the first invention, the fixed portion is provided so as to project inward of the cone portion, and the rib is connected to the outer peripheral surface of the fixed portion. And.

According to this configuration, the rib for increasing the rigidity of the cone portion is connected to the outer peripheral surface of the fixed portion, so that the fixed portion and the cone portion are connected, thereby further reinforcing the cone portion. ..

A third aspect of the invention is characterized in that, in the first or second invention, the ribs are arranged so as to cross the drainage holes.

According to this configuration, the vicinity of the portion where the drainage hole is formed in the cone portion is reinforced by the rib.

In the fourth aspect of the invention, in any one of the first to third aspects, a first air passage and a second air passage communicating with both the inside air introduction port and the outside air introduction port are formed inside the casing. The blower fan includes a first blade arranged in the first air passage and a second blade arranged in the second air passage, and the first blade makes it possible to use the first blade in the first air passage. The air is blown as air for air conditioning, and the air in the second air passage is blown as air for air conditioning by the second blade, and the first blade and the second blade are on the outer peripheral portion of the cone portion. Is characterized by being combined.

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 fan for blowing air rotates, so that the inside air introduced from the inside air introduction port flows through the first air passage and the second 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 the outside air is introduced from the outside air introduction port is set. In the outside air introduction mode, the fan for blowing air rotates, so that the outside air introduced from the outside air introduction port flows through the first air passage and the second air passage and is blown as air for air conditioning.

In addition, when the inside / outside air introduction port and the outside air introduction port are opened by the operation of the inside / outside air switching damper, the inside / outside air two-layer flow mode is set, and the ventilation fan rotates, so that the outside air introduced from the outside air introduction port becomes the first air. It flows through one of the passage and the second air passage, and the inside air introduced from the inside air introduction port flows through the other and is blown as air for air conditioning.

In a fifth aspect of the invention, in the fourth aspect, the first blade is coupled to the upper surface of the outer peripheral portion of the cone portion, the second blade is coupled to the lower surface of the outer peripheral portion of the cone portion, and the rib is formed. The upper end portion of the first blade is positioned below the lower end portion of the first blade.

According to this configuration, the ribs are less likely to obstruct the flow of wind.

A sixth aspect of the invention is characterized in that, in any one of the first to fifth inventions, a plurality of the ribs are arranged at equal intervals in the circumferential direction of the cone portion.

According to this configuration, the balance during rotation of the blower fan is improved.

In the seventh aspect of the invention, in any one of the first to sixth inventions, on the lower surface of the cone portion, a protruding portion protruding downward from the radial inner end portion of the rotating shaft in the drainage hole is a rib. It is characterized in that it is formed so as to be located directly below.

According to this configuration, the water flowing downward from the drain hole easily flows along the protrusion. Since this protruding portion protrudes from the radial inner end of the rotating shaft in the drain hole, it becomes difficult for water to flow in the direction approaching the rotating shaft, and thus water intrusion into the motor is suppressed. Further, since the protruding portion and the rib are positioned so as to overlap each other in the thickness direction of the cone portion, the rigidity of the cone portion is further improved.

An eighth aspect of the invention is characterized in that, in the seventh aspect, the protrusion extends in the circumferential direction of the rotation axis so as to pass directly below the plurality of ribs.

According to this configuration, the water flowing downward from the drain hole becomes difficult to flow in the direction approaching the rotation axis.

A ninth aspect of the invention is the invention of any one of the first to the eighth, wherein the rib includes a plurality of first ribs and a plurality of second ribs having different heights from each other, and the first rib and the second rib. The ribs are alternately arranged in the circumferential direction of the cone portion.

According to this configuration, by providing a plurality of first ribs and second ribs having different heights, the rigidity of the cone portion is increased, and by arranging these first ribs and second ribs alternately, the balance at the time of rotation is balanced. Become good.

According to a tenth aspect of the present invention, in the ninth invention, the first rib is formed higher than the second rib, and the drainage is provided between the first ribs arranged at intervals in the circumferential direction of the cone portion. It is characterized in that a hole is formed.

According to this configuration, since the height of the first rib is high, the effect of reinforcing the cone portion by the first rib is enhanced. Since the drainage holes are formed between the first ribs having a high reinforcing effect, it is possible to suppress the decrease in the rigidity of the cone portion due to the formation of the drainage holes.

According to the first invention, a drain hole for draining water on the upper surface of the cone portion to the lower side of the cone portion is formed, and a rib extending in the radial direction is formed at a position where the opening of the drain hole is not blocked. It is possible to secure the rigidity of the cone portion while suppressing the occurrence of defects by preventing water from remaining on the upper surface of the portion, and it is possible to prevent deformation and breakage of the blades.

According to the second invention, the rigidity of the cone portion can be further increased by connecting the rib to the outer peripheral surface of the fixed portion.

According to the third invention, by arranging the rib so as to cross the drainage hole, it is possible to increase the rigidity in the vicinity of the portion where the drainage hole is formed in the cone portion without deteriorating the drainage property.

According to the fourth invention, it is possible to switch between the outside air introduction mode, the inside air circulation mode, and the inside / outside air two-layer flow mode to blow air.

According to the fifth invention, since the ribs are less likely to obstruct the flow of wind, a sufficient air volume can be secured.

According to the sixth invention, since the plurality of ribs are arranged at equal intervals in the circumferential direction of the cone portion, the balance at the time of rotation of the blower fan can be improved.

According to the seventh invention, the water flowing downward from the drain hole becomes difficult to flow in the direction approaching the rotation axis, water intrusion into the motor can be suppressed, and the rigidity of the cone portion is further improved. be able to.

According to the eighth invention, since the protrusion extends in the circumferential direction of the rotation shaft, it is possible to prevent the water flowing downward from the drain hole from flowing in the direction approaching the rotation shaft.

According to the ninth invention, by alternately arranging a plurality of first ribs and a plurality of second ribs having different heights in the circumferential direction of the cone portion, the rigidity of the cone portion can be increased and the rotation of the cone portion can be increased. The balance of time can be improved.

According to the tenth invention, since the drainage hole is formed between the ribs having a high height, it is possible to suppress the decrease in the rigidity of the cone portion due to the formation of the drainage hole.

It is a rear view of the blower device for vehicle air-conditioning which concerns on embodiment of this invention. It is a left side view of a blower device for vehicle air conditioning. It is a bottom view of a blower device for vehicle air conditioning. FIG. 6 is a sectional view taken along line IV-IV in FIG. It is a top view of a fan for blowing air. FIG. 5 is a sectional view taken along line VI-VI in FIG. It is a bottom view of a fan for blowing air. FIG. 5 is a sectional view taken along line VIII-VIII in FIG. It is a perspective view which looked at the fan for blower from above. FIG. 6 is a diagram corresponding to FIG. 6 according to the first modification of the embodiment. FIG. 7 is a diagram corresponding to FIG. 7 according to the first modification of the embodiment. 12A is an enlarged view of part A of FIG. 10, FIG. 12B is a diagram corresponding to FIG. 12A according to the modified example 2, and FIG. 12C is a diagram corresponding to FIG. 12A according to the modified example 3. FIG. 7 is a diagram corresponding to FIG. 7 according to a modified example 4 of the embodiment. It is a figure corresponding to FIG. 7 which concerns on modification 5 of embodiment. FIG. 6 is a diagram corresponding to FIG. 6 according to a modification 6 of the embodiment.

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 essentially merely an example and is not intended to limit the present invention, its application or its use.

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 essentially merely an example and is not intended to limit the present invention, its application or its use.

FIG. 1 is a view of the vehicle air-conditioning blower 1 according to the embodiment of the present invention as viewed from the rear side of the vehicle, FIG. 2 is a view of the vehicle air-conditioning blower 1 as viewed from the left side, and FIG. 3 is a view. It is a figure which looked at the blower device 1 for vehicle air-conditioning from the lower side. The vehicle air-conditioning blower 1 is arranged, for example, in the vehicle interior of an automobile to blow air-conditioning air, and constitutes a vehicle air-conditioning device together with an air-conditioning unit and a refrigeration cycle device (not shown).

The air conditioning unit includes, for example, a cooling heat exchanger consisting of a refrigerating cycle evaporator, a heating heat exchanger consisting of a heater core, an air mix damper, a blowout direction switching damper, and an air conditioning casing accommodating 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, and is made into the air-conditioning air having a desired temperature, and then blown out. It is supplied to each part of the passenger compartment according to the blowout 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.

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 defined only for convenience of explanation, and does not limit the actual usage state, installation state, and assembly state.

Although not shown, the vehicle air-conditioning blower 1 is housed together with the air-conditioning unit inside an instrument panel provided at the front end of the vehicle interior. The air-conditioning unit is arranged in the center of the instrument panel in the left-right direction, while the vehicle air-conditioning blower 1 is located inside the instrument panel on the passenger side of the air-conditioning unit (on the 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, a case where the vehicle air-conditioning blower 1 is arranged on the right side of the vehicle will be described, but when it is arranged on the left side of the vehicle, it may be symmetrical with the structure of this embodiment. Detailed explanation will be omitted.

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

(Configuration of air conditioner for vehicle air conditioning)
As shown in FIG. 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, a first internal / external air switching damper 6, and the like. It includes 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.

The front inside air introduction port 2a and the rear inside air introduction port 2b shown in FIG. 2 and the like, 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 internal air introduction port 2a is formed at a portion on the upper side of the blower casing 2 closer to the front than the central portion in the front-rear direction, and is open to the inside of the vehicle interior. Further, the rear internal air introduction port 2b is formed at a portion on the upper side of the blower casing 2 closer to the rear than the central portion in the front-rear direction, and is open to the inside of the vehicle interior. It is possible to introduce the air (inside air) in the vehicle interior into the inside of the blower casing 2 from the front inside air introduction port 2a and the rear inside air introduction port 2.

As shown in FIG. 4, on the upper side of the blower casing 2, the outside air introduction duct portion 2d is provided in the blower casing 2 so as to bulge upward from the portion between the front inside air introduction port 2a and the rear inside air introduction port 2b. It is integrally molded. The upper side of the outside air introduction duct portion 2d extends forward. The outside air introduction port 2c is open 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 interior via the cowl. The air outside the vehicle interior (outside air) can be introduced into the inside of the blower casing 2 from the outside air introduction port 2c.

As shown in FIG. 4, the filter 8 is housed below the front inside air introduction port 2a, the rear inside air introduction port 2b, and the outside air introduction port 2c inside the ventilation casing 2. The filter 8 is formed in a plate shape and is arranged so as to extend in the horizontal direction. The peripheral edge 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 portion 8a provided at the rear end portion of the filter 8. The filter 8 can be made of, for example, a general non-woven fabric.

A partition wall portion 2g is provided above the filter 8 inside the blower casing 2. The partition wall portion 2g extends in the vertical direction, and is slightly inclined so as to be positioned later as it approaches the lower end portion. A first air passage R1 is formed on the upper side of the inside of the ventilation casing 2 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. It has become.

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. Further, the upstream end portion (upper end portion) 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 the common outside air introduction port 2c, but the inside air introduction port communicates with different inside air introduction ports 2a and 2b. As a result, the structure is such that 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 arranged inside the ventilation 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 blocking plate portion 6a extends in the left-right direction. The shaft portion 6b also extends in the left-right direction and is rotatably supported with respect to 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 radially from the shaft portion 6b and is connected to the left and right ends of the closing plate portion 6a. The closing plate portion 6a, the shaft portion 6b, and the end plate portion 6c are integrally molded. The first inside / outside air switching damper 6 is rotated around the center line of the shaft portion 6b to switch between a state of being rotated toward the front as shown in FIG. 4 and a state of being rotated toward the rear (not shown). Be 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 the inside air is blocked and the outside air becomes the first air. It is introduced in the upstream part of the passage R1. On the other hand, when the first inside / outside air switching damper 6 is rotated toward the rear, the front inside air introduction port 2a is opened to close the outside air introduction port 2c, so that the inflow of outside air is blocked and the inside air becomes the first. It is introduced in the upstream part of the air passage R1.

The second inside / outside air switching damper 7 is arranged inside the ventilation casing 2 on the rear side of the partition wall portion 2g, and like the first inside / outside air switching damper 6, the closing plate portion 7a and the shaft portion 7b. It is provided with 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 in which it is rotated toward the rear as shown in FIG. 4 and a state in which it is rotated toward the front (not shown). Be 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 is sent to the second air passage R2. Introduced in the upstream part of. On the other hand, when the second inside / outside air switching damper 7 is in a state of rotating forward, the rear inside air introduction port 2b is opened and the outside air introduction port 2c is closed, so that the inflow of the outside air is blocked and the inside air becomes the second. It is introduced in 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 and the like. Although not shown, the inside / outside air switching actuator 9 is controlled by an air conditioning control device. 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 actuator 9 for switching the inside / outside air. By doing so, the first inside / outside air switching damper 6 and the second inside / outside air switching damper 7 can be interlocked with each other. As 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, a conventionally known method can be used, so 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 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, an outside air introduction mode in which the first inside / outside air switching damper 6 is rotated forward and the second inside / outside air switching damper 7 is rotated backward, and a first inside / outside air switching damper. The inside air circulation mode in which the 6 is rotated backward 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 the second inside / outside air is switched. It is possible to switch to any mode among the three modes of the inside / outside air two-layer flow mode in which the damper 7 is rotated forward.

In the outside air introduction mode, the first inside / outside air switching damper 6 rotates toward the front and the second inside / outside air switching damper 7 rotates toward the rear, so that the first air passage R1 and the second air passage R2 have Only outside air is introduced. 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 have Only shyness is introduced. In the inside / outside air two-layer flow mode, the first inside / outside air switching damper 6 rotates forward and the second inside / outside air switching damper 7 rotates forward, so that the outside air is sent to the first air passage R1. It is introduced, and inside air is introduced into the second air passage R2. The inside / outside air two-layer flow mode is a mode used during heating.

Switching between the inside air circulation mode, the outside air introduction mode, and the inside / outside air two-layer flow mode is performed by a conventionally well-known auto air conditioner control. By setting the inside / outside air two-layer flow mode, relatively dry outside air is supplied to the defrost outlet in winter to clear the fogging of the front window glass well, and relatively warm inside air is supplied to the heat outlet. The heating efficiency can be improved.

Below the inside air introduction ports 2a and 2b and the outside air introduction port 2c of the blower casing 2, a scroll casing 20 in which the blower fan 3 is housed is provided. As shown in FIGS. 1 and 2, the scroll casing 20 includes an upper scroll casing 21 in which a portion of the blower fan 3 provided with the upper blade (first blade) 30 is accommodated, and a lower side of the blower fan 3. It is divided into a lower scroll casing 22 in which a portion provided with the blade (second blade) 31 is accommodated. The upper scroll casing 21 and the lower scroll casing 22 are integrated by fitting the lower portion of the upper scroll casing 21 and the upper portion of the lower scroll casing 22. The upper blade 30 and the lower blade 31 can also be referred to as blades.

Further, a bottom wall member 23 is provided below the scroll casing 20. The bottom wall member 23 is a member constituting the scroll casing 20. The scroll casing 20 is composed of the upper scroll casing 21, the lower scroll casing 22, and the bottom wall member 23. Further, inside the scroll casing 20, a partition plate 24 for vertically partitioning the inside of the scroll casing 20 is disposed, and the partition plate 24 is also a member constituting the scroll casing 20. A through hole 24a is formed in the partition plate 24.

A substantially circular first bell mouth opening 21a is formed on the upper wall portion of the upper scroll casing 21 so as to open inside the ventilation casing 2. The first bell mouth opening 21a is arranged so as to face the lower surface of the filter 8 and communicates with the first air passage R1. Further, the upper wall portion of the upper scroll casing 21 is provided with a protruding wall portion 21b protruding upward. 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 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 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 passage is in front of the protruding wall portion 21b and the partition wall portion 2g. R1 is formed, and 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 21 via the first bellmouth opening 21a, and the inside of the upper scroll casing 21 is a part of the first air passage R1. Above the partition plate 24 is the first air passage R1. The portion of the blower fan 3 provided with the upper blade 30 is arranged in the first air passage R1 inside the upper scroll casing 21. When the first blower fan 3 rotates inside the upper scroll casing 21, the air in the first air passage R1 is blown as air conditioning air by the portion of the blower fan 3 provided with the upper blade 30. That is, the portion of the blower fan 3 provided with the upper blade 30 is a portion that forms an air flow in the upper layer.

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

As shown in FIG. 4, the second air passage R2 extends downward toward the rear side inside the upper scroll casing 21, and the lower end portion of the second air passage R2 reaches the bottom wall member 23. The lower wall portion of the lower scroll casing 22 is separated upward from the bottom wall member 23, and the lower end portion of the second air passage R2 is located between the lower wall portion of the lower scroll casing 22 and the bottom wall member 23. is doing. The lower wall portion of the lower scroll casing 22 is provided with a bell mouth component 22b having a substantially circular second bell mouth opening 22a formed therein. The second bell mouth opening 22a is arranged so as to face the bottom wall member 23 and communicates with the lower end portion of the second air passage R2. The second bell mouth opening 22a and the first bell mouth opening 21a are located concentrically. The bell mouth component 22b is adapted to fit into the peripheral edge of the opening 22c formed in the lower wall of the lower scroll casing 22.

The lower end of the second air passage R2 communicates with the inside of the lower scroll casing 22 via the second bellmouth opening 22a, and the inside of the lower scroll casing 22 is a part of the second air passage R2. It has become. Below the partition plate 24 is the second air passage R2. The portion of the blower fan 3 provided with the lower blade 31 is arranged in the second air passage R2 inside the lower scroll casing 22. When the blower fan 3 rotates, the air in the second air passage R2 is blown as air conditioning air by the portion of the blower fan 3 provided with the lower blade 31. That is, the portion of the blower fan 3 provided with the lower blade 31 is a portion that forms an air flow in the lower layer.

As shown in FIG. 2, a lower air outlet 22c connected to the air conditioning unit is formed on the front side of the left wall portion of the lower scroll casing 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 so that 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 22. 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 22 and covers the lower end portion. The peripheral edge portion of the bottom wall member 23 is formed so as to fit into the peripheral edge portion of the lower end portion of the lower scroll casing 22, and the peripheral edge portion of the bottom wall member 23 and the peripheral edge portion of the lower end portion of the lower scroll casing 22. Air does not leak from between the parts.

A motor 5 is attached to the bottom wall member 23 via the motor mounting member 5a. A blower fan 3 is arranged on the upper side of the motor 5. The motor mounting member 5a 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 portion 5b containing a rotor and the like, a rotating shaft 5c extending in the vertical direction, and a cover portion 5d that covers the main body portion 5b from above. The rotating shaft 5c is provided so as to project upward from the upper end portion of the main body portion 5b, penetrate the cover portion 5d, and further project upward from the cover portion 5d, and the first bell mouth opening 21a and the second bell mouth opening 21a and the second. It is arranged concentrically with the bell mouth opening 22a. The upper end of the rotating shaft 5c is located above the second bell mouth opening 22a.

The cover portion 5d is provided with a tubular portion 5e that surrounds the circumference of the rotating shaft 5c. The tubular portion 5e can be formed in a cylindrical shape and is arranged concentrically with the rotating shaft 5c. Instead of the tubular portion 5e, a plurality of arc-shaped wall portions may be provided. The rotating shaft 5c projects upward from the upper end of the tubular portion 5e.

A blower fan 3 is fixed to the rotary shaft 5c, and the blower fan 3 and the rotary shaft 5c rotate integrally with the rotary shaft 5c. Therefore, when a voltage is applied to the main body 5b of the motor 5, the rotational force of the rotating shaft 5c is transmitted to the blower fan 3, and the portion of the blower fan 3 provided with the upper blade 30 is the first air passage R1. The portion of the blower fan 3 provided with the lower blade 31 rotates inside 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 have a desired rotation speed.

(Configuration of blower fan 3)
As shown in FIGS. 5 to 9, the blower fan 3 has a fixed portion 33 fixed to the rotating shaft 5c of the motor 5 and a cone portion 34 extending from the fixed portion 33 in the radial direction of the rotating shaft 5c. And a large number of upper blades 30 and lower blades 31 fixed on the radial outer side of the cone portion 34. The fixed portion 33, the cone portion 34, the upper blade 30, and the lower blade 31 can be 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 rotation shaft 5c of the motor 5 is inserted. The upper portion of the fixed portion 33 projects upward from the upper surface of the inner peripheral portion 34b of the cone portion 34, and therefore the upper portion of the fixed portion 33 is positioned so as to project inward of the cone portion 34. .. The insertion hole 33a of the fixed portion 33 extends in the vertical direction, and both the upper end portion and the lower end portion 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 has been conventional, detailed description thereof will be omitted.

The cone portion 34 is formed so as to be recessed downward. That is, the cone portion 34 has an outer peripheral portion 34a and an inner peripheral portion 34b, and the outer peripheral portion 34a and the inner peripheral portion 34b are integrally molded. The inner peripheral portion 34b extends radially outward from the vertical intermediate portion of the outer peripheral surface of the fixed portion 33. The inner peripheral portion 34b can be formed to be inclined or curved so as to be positioned lower as it approaches the radial outer end portion. The outer peripheral portion 34a extends upward from the radial outer end portion of the inner peripheral portion 34b, and is inclined or curved so as to be located radially outward as it approaches the upper end portion. The shapes of the outer peripheral portion 34a and the inner peripheral portion 34b are examples, and the outer peripheral portion 34a and the inner peripheral portion 34b may have a smoothly continuous shape, 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 portion 34a and the inner peripheral portion 34b form a shape in which the shape of the cone portion 34 is recessed downward, and the shape can be called, for example, a bowl shape or a concave shape. Further, the upper end portion of the outer peripheral portion 34a of the cone portion 34 extends outward in the radial direction, and this extending portion extends in a direction substantially orthogonal to the rotation axis 5c of the motor 5. Further, the lower end portion of the outer peripheral portion 34a is the lowest portion of the cone portion 34.

The lower end portion of the upper blade 30 is coupled to the upper surface of the extending portion of the outer peripheral portion 34a of the cone portion 34, and is provided so as to extend upward from the upper surface. The upper end portion of the lower blade 31 is coupled to the lower surface of the extending portion of the outer peripheral portion 34a of the cone portion 34, and is provided so as to extend downward from the lower surface. When the blower fan 3 rotates, air is sucked from above the upper blade 30, blown out radially from between the upper blades 30 adjacent to each other in the circumferential direction, and air is sucked from below the lower blade 31. It blows out in the radial direction from between the lower blades 31 adjacent to each other in the circumferential direction.

The cone portion 34 is provided with a plurality of drain holes 34c for draining water on the upper surface of the cone portion 34 below the cone portion 34. The plurality of drain holes 34c are provided at the lower end 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 rotation shaft 5c. Further, the inner peripheral portion 34b can be tilted so as to be positioned lower as it approaches the radial outer end portion, whereby the shape is such that the inner peripheral portion 34b is tilted downward toward the lower edge portion of the drainage hole 34c. , Water on the upper surface of the inner peripheral portion 34b easily flows toward the drain hole 34c.

The intervals between these drain holes 34c can be made equal. Further, the drainage hole 34c is positioned upward from the upper end portion of the tubular portion 5e of the cover portion 5d and radially outward from the tubular portion 5e. Therefore, in a plan view, the drainage hole 34c is located outside the tubular portion 5e.

As shown in FIG. 5, a plurality of first ribs 35 and second ribs 36 extending in the radial direction of the rotation shaft 5c 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 34a 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 to the outer peripheral portion 34a of the cone portion 34, and the fixed portion 33 and the outer peripheral portion 34a. It can also be called a connecting rib that connects the above. 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. The wall thicknesses of the first rib 35 and the second rib 36 can be the same, but the thicknesses may be different from each other. The first rib 35 and the second rib 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 portion 34b of the cone portion 34. Therefore, the fixed portion 33, the inner peripheral portion 34b of the cone portion 34, and the outer peripheral portion 34a of the cone portion 34 are connected and integrated by the first rib 35 and the second rib 36.

The second rib 36 is arranged so as to cross the drain hole 34c. In a plan view, the second rib 36 passes through the central portion of the opening width of the drain hole 34c, so that one drain hole 34c is arranged so as to straddle the one second rib 36. It will be divided into two at the center of the drainage hole 34c opening width. By arranging 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. Further, 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. In addition, one or both of the first rib 35 and the second rib 36 may be omitted.

The upper end portions of the first rib 35 and the second rib 36 are positioned below the lower end portions of the upper blade 30. As a result, the first rib 35 and the second rib 36 are less likely to obstruct the flow of wind, so that a sufficient amount of air can be secured.

Further, the plurality of first ribs 35 are arranged at equal intervals in the circumferential direction of the rotation shaft 5c. Further, the plurality of second ribs 36 are also arranged at equal intervals in the circumferential direction of the rotation shaft 5c. The distances 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 to be equal. As a result, the balance of the blower fan 3 during rotation is improved.

(Action and effect of the 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 ports 2c are closed by the operation of the inside / outside air switching dampers 6 and 7, the outside air introduction ports 2c are closed. The inside air circulation mode is set so that the inside air is introduced from the inside air introduction ports 2a and 2b. In the inside air circulation mode, the ventilation fan 3 rotates, 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 and is blown as air conditioning 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 / outside air switching dampers 6 and 7, the outside air introduction mode in which the outside air is introduced from the outside air introduction port 2c is set. In the outside air introduction mode, the ventilation fan 3 rotates, 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 and is blown as air conditioning air.

Further, when the inside / outside air introduction ports 2a and 2b and the outside air introduction port 2c are opened by the operation of the inside / outside air switching dampers 6 and 7, the inside / outside air two-layer flow mode is set and the ventilation fan 3 rotates to rotate the outside air introduction port 2c. The outside air introduced from the above flows through the first air passage R1, the inside air introduced from the inside air introduction ports 2a and 2b flows through the second air passage R2, and is blown as air conditioning air. That is, according to the vehicle air-conditioning blower 1 according to this embodiment, it is possible to switch between the outside air introduction mode, the inside air circulation mode, and the inside / outside air two-layer flow mode to blow air.

For example, rainwater or water from car washing may enter the inside of the scroll casing 20 from the outside air introduction port 2c. When water enters the inside of the scroll casing 20, it may reach the upper surface of the cone portion 34 of the blower fan 3. When the water reaches the upper surface of the cone portion 34, the drain hole 34c is formed in the cone portion 34, so that the water is drained from the drain hole 34c to the lower side of the cone portion 34. Therefore, it is difficult for water to remain accumulated on the upper surface of the cone portion 34. At this time, the water that reaches the upper surface of the cone portion 34 flows toward the lowest portion of the cone portion 34, but the drain hole 34c is provided at the lowest portion of the cone portion 34. The effect that water is less likely to stay on the upper surface of the cone portion 34 becomes even more remarkable.

At this time, since the drainage hole 34c is located radially outside the tubular portion 5e of the cover portion 5d, the water dripping from the drainage hole 34c flows outside the tubular portion 5e, and the motor. The infiltration of water into the main body 5b of 5 is suppressed.

Further, since the first rib 35 and the second rib 36 inside the cone portion 34 extend in the radial direction, the cone portion 34 having a downwardly recessed shape is reinforced by the first rib 35 and the second rib 36. The rigidity of the cone portion 34 can be sufficiently ensured.

(Other embodiments)
The above embodiments are merely exemplary in all respects and should not be construed in a limited way. Further, all modifications and modifications belonging to the equivalent scope of the claims are within the scope of the present invention.

As in the first modification of the embodiment shown in FIGS. 10, 11 and 12A, the lower surface of the cone portion 34 has a protruding portion 34d protruding downward from the radial inner end portion of the rotating shaft 5c in the drainage hole 34c. It may be formed. As a result, the water flowing downward from the drain hole 34c easily flows along the protrusion 34d. Since the protruding portion 34d protrudes from the radial inner end of the rotating shaft 5c in the drain hole 34c, it becomes difficult for water to flow in the direction approaching the rotating shaft 5c, and thus water intrusion into the motor 5 is suppressed. Will be done. A plurality of protruding portions 34d extend in the circumferential direction of the rotating shaft 5c and are provided. Further, the protruding portions 34d can be provided at equal intervals in the circumferential direction of the rotating shaft 5c. The protrusion 34d can also be formed so as to extend in an arc shape concentric with the rotation shaft 5c.

The protrusion 34d is located directly below the first rib 35 and the second rib 36. Since the protrusion 34d extends in the circumferential direction, the protrusion 34d common to the portion where the first rib 35 is formed in the cone portion 34 and the portion where the second rib 36 is formed in the cone portion 34 is located. It will be. Further, since the protruding portion 34d and the first rib 35 and the second rib 36 are positioned so as to overlap each other in the thickness direction (vertical direction) of the cone portion 34, the rigidity of the cone portion 34 is further improved.

As shown in FIG. 12A, the width W of the lower end surface 34e of the protrusion 34d can be 1.0 mm or less. As a result, the water that has flowed along the protrusion 34d to the lower end surface 34e is likely to drip.

As in the second modification of the embodiment shown in FIG. 12B, the lower end surface 34e of the protruding portion 34d may be a curved surface.

As in the modified example 3 of the embodiment shown in FIG. 12C, the lower portion of the protrusion 34d can be formed so as to be pointed downward. Also in the cases of Modifications 2 and 3, the water flowing along the protrusion 34d is likely to drip.

As in the modified example 4 of the embodiment shown in FIG. 13, a convex portion 34f protruding outward in the radial direction may be formed at the end portion of the protruding portion 34d. As a result, it is possible to prevent water from flowing inward in the radial direction from between the protrusions 34d adjacent to each other in the circumferential direction.

As in the modified example 5 of the embodiment shown in FIG. 14, the protruding portion 34d may be formed into an annular shape continuous in the circumferential direction of the rotating shaft 5c.

As in the modified example 6 of the embodiment shown in FIG. 15, the vertical plate portion 37 and the horizontal plate portion 38 may be provided on the outer peripheral portion 34a of the cone portion 34 of the blower fan 3. The vertical plate portion 37 extends downward from the lower surface of the outer peripheral portion 34a of the cone portion 34 and is formed in an annular shape. The horizontal plate portion 38 extends radially outward from the lower end portion of the vertical plate portion 37. The upper end portion of the lower blade 31 is coupled to the lower surface of the horizontal plate portion 38.

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

1 Blower for vehicle air conditioning 2 Blower casing 2a, 2b Inside air introduction port 2c Outside air introduction port 3 Blower fan 5 Motor 5b Main body 5c Rotating shaft 5d Cover part 5e Cylindrical part 20 Scroll casing 30 Upper blade (first blade)
31 Lower blade (second blade)
33 Fixed part 34 Cone part 34c Drainage hole 34d Protruding part 35 1st rib 36 2nd rib R1 1st air passage R2 2nd air passage

Claims (10)

A casing in which an inside air introduction port for introducing air inside the vehicle interior and an outside air introduction port for introducing air outside the vehicle interior are formed, and an inside / outside air switching damper for opening / closing the inside air introduction port and the outside air introduction port is housed.
A fan for blowing air arranged inside the casing,
In a vehicle air-conditioning blower equipped with a motor having a rotating shaft extending in the vertical direction,
The blower fan is placed above the motor,
The blower fan includes a fixed portion fixed to the rotating shaft, a cone portion extending in the radial direction of the rotating shaft from the fixed portion, and a blade fixed to the radial outside of the cone portion. ,
The cone portion is formed so as to be recessed downward, and has a plurality of drain holes for draining water on the upper surface of the cone portion to the lower portion of the cone portion.
A blower for vehicle air conditioning, characterized in that a rib extending in the radial direction is provided inside the cone portion at a position where the opening of the drain hole is not closed. In the vehicle air-conditioning blower according to claim 1,
The fixed portion is provided so as to project inward of the cone portion.
The rib is a blower for vehicle air conditioning, characterized in that it is connected to the outer peripheral surface of the fixed portion. In the vehicle air-conditioning blower according to claim 1 or 2.
The rib is a blower for vehicle air conditioning, characterized in that it is arranged so as to cross the drain hole. In the vehicle air-conditioning blower according to any one of claims 1 to 3.
Inside the casing, a first air passage and a second air passage communicating with both the inside air introduction port and the outside air introduction port are formed.
The blower fan includes a first blade arranged in the first air passage and a second blade arranged in the second air passage, and the first blade blows air in the first air passage. It is configured to blow air as air conditioning air, and the air in the second air passage is blown as air conditioning air by the second blade.
A vehicle air-conditioning blower having the first blade and the second blade coupled to the outer peripheral portion of the cone portion. In the vehicle air-conditioning blower according to claim 4,
The first blade is coupled to the upper surface of the outer peripheral portion of the cone portion.
The second blade is coupled to the lower surface of the outer peripheral portion of the cone portion.
A vehicle air-conditioning blower characterized in that the upper end portion of the rib is positioned below the lower end portion of the first blade. In the vehicle air-conditioning blower according to any one of claims 1 to 5.
A vehicle air-conditioning blower having a plurality of the ribs arranged at equal intervals in the circumferential direction of the cone portion. In the vehicle air-conditioning blower according to any one of claims 1 to 6.
A vehicle air conditioner characterized in that a protrusion protruding downward from the radial inner end portion of the rotation shaft in the drain hole is formed on the lower surface of the cone portion so as to be located directly below the rib. Blower for. In the vehicle air-conditioning blower according to claim 7.
The blower for vehicle air conditioning, wherein the protrusion extends in the circumferential direction of the rotation axis so as to pass directly below the plurality of ribs. In the vehicle air-conditioning blower according to any one of claims 1 to 8.
The ribs include a plurality of first ribs and a plurality of second ribs having different heights from each other.
A vehicle air-conditioning blower characterized in that the first rib and the second rib are alternately arranged in the circumferential direction of the cone portion. In the vehicle air-conditioning blower according to claim 9,
The first rib is formed higher than the second rib,
A vehicle air-conditioning blower having the drainage holes formed between the first ribs arranged at intervals in the circumferential direction of the cone portion.

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