JP2022017807A - Blower for vehicle air conditioning - Google Patents

Abstract

To provide a blower for a vehicle air conditioning which enables improvement of accuracy of balance adjustment of a blowing fan while enabling variations of each part to be absorbed and enables improvement of workability during the balance adjustment in a case in which a bell mouth constitution part is formed separately from a casing.SOLUTION: A blower for vehicle air conditioning includes temporary holding parts 70 for temporarily holding support leg parts 62 of a bell mouth constitution part 60 on a motor flange part 5f when the motor flange part 5f is removed from a casing. The temporary holding part 70 can be switched between a fixed state, in which the temporary holding part 70 fixes the support leg part 62 to the motor flange part 5f, and a non-fixed state, in which the temporary holding part 70 holds the support leg part 62 without fixing the support leg part 62 to the motor flange part 5f, by rotational operation of the bell mouth constitution part 60 around a rotary shaft 5c.SELECTED DRAWING: Figure 7

Description

The present invention relates to a vehicle air-conditioning blower mounted on, for example, an automobile.

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 is used as a cooling heat exchanger and a heating heat exchanger. 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 3, the casing of the air conditioner for vehicle air conditioning 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 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.

Since the air conditioners of Patent Documents 1 to 3 have a structure in which air is sucked from below the lower layer blower fan, a bellmouth component having a bellmouth opening is arranged below the lower layer blower fan. There is. Since the bell mouth component is a member located between the lower layer blower fan and the motor, it is difficult to integrally mold it with the casing, and as disclosed in Patent Documents 2 and 3, it is separate from the casing. It is said that.

Japanese Unexamined Patent Publication No. 2011-23589 Japanese Unexamined Patent Publication No. 2017-171020 Japanese Unexamined Patent Publication No. 2019-171983

By the way, in the manufacturing process of the air conditioner, the lower layer blower fan may be fixed to the motor and assembled to the casing in an integrated state. In this case, since it is difficult to assemble the bell mouth component later, it is necessary to integrate the bell mouth component with the motor. In Patent Document 3, when the motor is removed from the casing, the bell mouth component is engaged with the motor with some rattling. As a result, it is possible to absorb variations in the manufacturing of each part.

However, the structure that gives the bell mouth component rattling may cause a problem when adjusting the balance of the blower fan. That is, when the balance of the blower fan is adjusted, the blower fan is actually rotated, but the vibration when the blower fan is rotated causes the bell mouth component to rattle, and as a result, the accuracy of the balance adjustment is improved. There was a risk of deterioration. In addition, the rattling of the bell mouth component may make it difficult for the operator to adjust the balance.

Therefore, before adjusting the balance, it is conceivable to temporarily fix the bell mouth component member to the motor by using a jig, tape, a clip, or the like so as not to rattle the motor. However, there is a problem that the cost for preparing jigs, tapes, clips and the like is high, and temporary fixing work using them is required, which causes an increase in man-hours. In addition, if this assembly is performed with the tape, clip, etc. attached, there is a risk of causing a problem.

The present invention has been made in view of this point, and an object of the present invention is to blow air while making it possible to absorb manufacturing variations of each part when the bell mouth component is made of a member different from the casing. The purpose is to improve the accuracy of the balance adjustment of the fan and to improve the workability at the time of balance adjustment.

In order to achieve the above object, 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 the inside air introduction port and the outside air introduction port are formed. A first air passage and a second air passage communicating with both of the above are formed inside, and inside the casing and the casing containing the inside / outside air switching dampers that open and close the inside air introduction port and the outside air introduction port. It has a centrifugal blower fan having a first blade and a second blade, and a rotating shaft arranged under the blower fan and extending in the vertical direction to drive the blower fan to rotate. A motor having a motor flange portion extending in the radial direction of the rotating shaft and fixed to the bottom wall portion of the casing is a separate member from the casing, and is arranged so as to face the lower side of the blower fan. A bellmouth component having a bellmouth opening and a support leg for arranging the bellmouth opening at a predetermined height is provided in the first air passage by the first blade of the blower fan. In a vehicle air-conditioning blower configured to blow air as air-conditioning air and blow air in the second air passage as air-conditioning air by the second blade of the blower fan, the motor flange portion. Is provided with a temporary holding portion for temporarily holding the support leg portion to the motor flange portion when the support leg portion is removed from the casing, and the temporary holding portion is provided around the rotation axis of the bell mouth component. It is possible to switch between a fixed state in which the support leg portion is fixed to the motor flange portion and a non-fixed state in which the support leg portion is held to the motor flange portion and is not fixed. It is characterized by that.

According to this configuration, in the inside air circulation mode in which the inside air is introduced from the inside air introduction port, the inside air introduced from the inside air introduction port is turned into the first air passage by the first blade and the second blade by rotating the blower fan. And, it flows through 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. Furthermore, 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. That is, 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.

Further, when assembling the bell mouth component to the casing, the support leg portion of the bell mouth component is temporarily held by the temporary holding portion on the motor flange portion before the motor flange portion is assembled to the casing. At this time, by holding the support leg portion in a non-fixed state with respect to the motor flange portion, the bell mouth component can be displaced with respect to the motor flange portion. The non-fixed state is a state in which the motor is displaceable without being fixed in one place and can move with respect to the motor flange portion. The bell mouth component can be displaced in the axial direction of the rotation axis or in the circumferential direction with respect to the motor flange portion.

Therefore, when the motor flange portion is attached to the casing, even if there is a variation between the motor flange portion and the bell mouth component, a variation between the bell mouth component and the casing, and a variation between the motor flange portion and the casing, the bell By dislocating the mouse component with respect to the motor flange portion, it is possible to absorb the variation of each portion and to assemble the motor flange portion and the bell mouth component to the casing without difficulty.

Further, when adjusting the balance of the blower fan, the support leg portion of the bell mouth component can be fixed to the motor flange portion by rotating the bell mouth component. .. As a result, even if vibration is generated by rotating the blower fan, the bell mouth component does not rattle, and the accuracy of balance adjustment can be improved. Further, since the bell mouth component does not rattle, it becomes easy for the operator to perform the balance adjustment work.

In the second invention, the temporary holding portion has a first protruding portion protruding in the radial direction of the rotating shaft from the lower portion of the supporting leg portion and a second protruding portion protruding in the circumferential direction of the rotating shaft from the supporting leg portion. It includes a protruding portion and a holder portion that protrudes upward from the upper surface of the motor flange portion and into which the lower portion of the support leg portion is inserted, and the holder portion is engaged with the upper surface of the first protruding portion. The engagement hole that allows the first protrusion to move around the rotation axis and the lower surface of the second protrusion when the bell mouth component is rotated in one direction until it is in a fixed state. On the other hand, it is characterized by having a contact portion that separates from the second protruding portion when rotated until it is in a non-fixed state.

According to this configuration, the bell mouth component is temporarily held by the motor flange portion by engaging the first protruding portion of the support leg portion of the bell mouth component with the engaging hole of the holder portion of the motor flange portion. .. When engaged, the engaging holes allow the first protrusion to move around the axis of rotation and can be in a non-fixed state.

On the other hand, when the bell mouth component is rotated until it is in a fixed state, the lower surface of the second protruding portion of the support leg portion comes into contact with the contact portion of the holder portion. Since the upper surface of the first protrusion engages with the engagement hole, the support legs are restricted from moving in the vertical direction by the first protrusion and the second protrusion, and the bell mouth component is fixed to the motor flange portion. To.

Therefore, it is possible to switch between the non-fixed state and the fixed state by a simple operation of rotating the bell mouth component.

The third invention is characterized in that the lower surface of the second protrusion is gradually raised in one direction.

According to this configuration, when the bell mouth component is rotated in one direction so as to be in a fixed state, the lower surface of the second protruding portion is raised at the initial stage, so that when the bell mouth component is in contact with the contact portion, the lower surface is raised. The surface pressure is low, and the surface pressure gradually increases as the bell mouth component rotates. As a result, the bell mouth component can be fixed to the motor flange portion as if it were tightened.

A fourth aspect of the invention is characterized in that the vertical dimension of the engaging hole is set longer than the vertical dimension of the first protruding portion.

As a result, the bell mouth component can be displaced in the vertical direction with respect to the motor flange portion in the non-fixed state.

In the fifth aspect of the invention, the temporary holding portion includes a protruding portion protruding in the radial direction of the rotating shaft from the lower portion of the supporting leg portion, and a holder portion provided on the upper surface of the motor flange portion. The holder portion is provided at a distance upward from the upper surface of the motor flange portion, and the holder side plate portion forms a gap between the holder portion and the upper surface of the motor flange portion so that the protrusion can be inserted from the circumferential direction. And a convex portion formed on a portion of the upper surface of the motor flange portion facing the holder side plate portion, and the distance between the tip surface of the convex portion and the lower surface of the holder side plate portion is the protrusion. A portion of the lower surface of the holder side plate portion that is set to be the same as the vertical dimension of the portion or narrower than the vertical dimension of the protruding portion and is separated from the convex portion in the circumferential direction of the rotation shaft, and the motor flange portion. The distance from the upper surface of the motor is set wider than the vertical dimension of the protrusion.

According to this configuration, the protruding portion of the support leg portion of the bell mouth component is inserted between the holder side plate portion of the holder portion of the motor flange portion and the upper surface of the motor flange portion, and the tip surface of the convex portion is formed. When arranged between the lower surface of the holder side plate portion, it is sandwiched between the tip surface of the convex portion and the lower surface of the holder side plate portion to restrict the movement in the vertical direction, and the bell mouth component is fixed to the motor flange portion. As a result, the bell mouth component does not rattle when adjusting the balance of the blower fan.

On the other hand, when the bell mouth component is rotated and the protruding portion of the support leg is arranged in a portion where the distance between the lower surface of the holder side plate portion and the upper surface of the motor flange portion is wide, the protruding portion is arranged with respect to the motor flange portion. It becomes possible to move up and down. As a result, the bell mouth component can be in a non-fixed state.

A sixth aspect of the invention is characterized in that the holder portion includes a base portion protruding upward from the upper surface of the motor flange portion, and the holder side plate portion is integrally molded on the upper portion of the base portion.

According to this configuration, the holder side plate portion can be integrally molded with the motor flange portion together with the base portion. Further, when the bell mouth component is rotated and the protruding portion abuts on the base portion, the rotation of the bell mouth component is stopped. That is, the base can be used as a stopper.

A seventh aspect of the invention is characterized in that the bell mouth component is vertically sandwiched between the casing and the motor flange portion when the motor flange portion is in a state of being assembled to the casing. do.

According to this configuration, when the motor flange portion is assembled to the casing, the bell mouth component is sandwiched in the vertical direction by the casing and the motor flange portion, so that rattling of the bell mouth component is suppressed. This makes it possible to prevent the generation of vibration and abnormal noise during operation.

In the eighth aspect of the invention, the bell mouth component has a bell mouth plate portion formed with the bell mouth opening and extending in the radial direction of the ventilation fan, and the bell mouth plate portion has the bell mouth plate portion. It is characterized in that a fitting portion that fits into the ridge portion formed in the casing is provided.

According to this configuration, the bell mouth component can be positioned in a state where the fitting portion of the bell mouth plate portion is fitted to the ridge portion of the casing.

According to the present invention, when the bell mouth component is made a separate member from the casing, it is possible to improve the accuracy of the balance adjustment of the blower fan while facilitating the assembling work by making it possible to absorb the variation of each part. At the same time, workability at the time of balance adjustment can be improved.

It is a perspective view which looked at the blower device for vehicle air-conditioning which concerns on Embodiment 1 of this invention from the rear. It is a rear view of the said blower for vehicle air conditioning. It is a left side view of the blower device for vehicle air conditioning. It is an exploded perspective view of the blower for vehicle air-conditioning which omitted the fan for blower, the bell mouth component, and the motor. It is an exploded perspective view of a fan for blower, a bell mouth component, and a motor. It is a perspective view which shows the state which integrated the blower fan, the bell mouth component, and the motor. It is a perspective view which shows the state which temporarily held the bell mouth component to a motor. It is a perspective view which looked at the holder part of Embodiment 1 from above. It is a side view which looked at the lower part of a leg part from the outside in the radial direction. It is a side view which shows just before inserting a leg part into a holder part. FIG. 10A is a view corresponding to FIG. 10A showing a case where the radial protrusion of the leg is engaged with the holder to be in a non-fixed state. FIG. 10A is a diagram corresponding to FIG. 10A showing a case where the legs are displaced to the lower end position to be in a non-fixed state. FIG. 10A is a diagram corresponding to FIG. 10A showing a fixed state. It is a perspective view which looked at the fixed temporary holding part from above. FIG. 3 is an enlarged view of the lower part of the circumferential protrusion according to the first embodiment. FIG. 14A is a diagram corresponding to FIG. 14A according to a modified example of the first embodiment. It is a figure corresponding to FIG. 7 which concerns on Embodiment 2 of this invention. It is a perspective view which shows the state before the temporary holding by the temporary holding part which concerns on Embodiment 2. FIG. It is a perspective view which shows the case where the temporary holding part which concerns on Embodiment 2 is in a fixed state. It is a perspective view which shows the case where the temporary holding part which concerns on Embodiment 2 is in a non-fixed state.

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.

(Embodiment 1)
FIG. 1 is a perspective view of the vehicle air-conditioning blower 1 according to the first embodiment of the present invention as viewed from the rear side of the vehicle, and FIG. 2 is a view of the vehicle air-conditioning blower 1 as viewed from the rear side. FIG. 3 is a view of the vehicle air-conditioning blower 1 as viewed from the left. 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 the convenience of explanation, and does not limit the actual usage state, installation state, posture at the time of assembly, and the like.

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 the engine, the 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 FIGS. 4 and 5, 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 inside / outside air switching damper 7, an air filter 8 (shown by a broken line in FIG. 2), and an inside / outside air switching actuator 9 (shown in FIGS. 1, 2 and 4) are provided. 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.

On the upper side of the blower casing 2, the left side inside air introduction port 2a and the right side inside air introduction port 2b shown in FIG. 2 and the like, and the outside air introduction port 2c shown in FIG. 3 are formed. As shown in FIG. 2, the left internal air introduction port 2a is formed in a wide range from a portion on the upper side of the blower casing 2 to the right of the central portion in the left-right direction to the vicinity of the left end portion, and is open in the vehicle interior. There is. Further, the right inside air introduction port 2b is formed from a portion on the upper side of the blower casing 2 to the right of the central portion in the left-right direction to the vicinity of the right end portion, and is open to the inside of the vehicle interior. The left-right dimension of the left inside air introduction port 2a is set longer than the left-right dimension of the right side inside air introduction port 2b. It is possible to introduce the air (inside air) in the vehicle interior into the inside of the blower casing 2 from the left side inside air introduction port 2a and the right side inside air introduction port 2. The opening area of the left inside air introduction port 2a is set wider than the opening area of the right side inside air introduction port 2b.

As shown in FIG. 3, on the upper side of the blower casing 2, the outside air introduction duct portion 2d is integrally molded with the blower casing 2 so as to extend forward. A long outside air introduction port 2c is opened in the left-right direction at the front end portion 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. 2, the filter 8 is housed below the left side inside air introduction port 2a, the right side inside air introduction port 2b, and the outside air introduction port 2c inside the ventilation casing 2. In FIG. 4, the filter 8 is omitted. 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 a filter support portion (not shown) provided inside the blower casing 2. The filter 8 can be made of, for example, a general non-woven fabric.

As shown in FIG. 4, 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. As shown in FIG. 1, inside the ventilation casing 2, a first air passage R1 is formed on the left side of the partition wall portion 2g, and a second air passage R2 is formed on the right side of the partition wall portion 2g. .. The width of the first air passage R1 in the left-right direction is set wider than the width of the second air passage R2 in the left-right 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 left 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 right 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.

As shown in FIG. 4, the first inside / outside air switching damper 6 is arranged on the left side of the partition wall portion 2g inside the ventilation casing 2, and includes the closing plate portion 6a, the shaft portion 6b, and the end plate portion 6c. It is equipped with. The blocking plate portion 6a extends in the left-right direction. The shaft portion 6b also extends in the left-right direction, and the shaft portion 6b is rotatably supported with respect to the side wall portion 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 block 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 switched between a state of being rotated forward and a state of being rotated backward by rotating around the center line of the shaft portion 6b. When the first inside / outside air switching damper 6 is rotated backward, the left 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 is sent to the first air passage R1. Introduced in the upstream part of. On the other hand, when the first inside / outside air switching damper 6 is rotated forward, the left side inside air introduction port 2a is opened to block 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 on the right side of the partition wall portion 2g inside the blower casing 2, and like the first inside / outside air switching damper 6, the closing plate portion 7a, the shaft portion 7b, and the ends. It is provided with a plate portion 7c. The second inside / outside air switching damper 7 is switched between a state of being rotated backward and a state of being rotated forward by rotating around the center line of the shaft portion 7b. When the second inside / outside air switching damper 7 is rotated backward, the right 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 rotated forward, the right side inside air introduction port 2b is opened to block the outside air introduction port 2c, so that the inflow of 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 (shown in FIGS. 1 to 3) 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 engaged with the shaft portion 9a. The first inside / outside air switching damper 6 and the second inside / outside air switching damper 7 can be interlocked by rotating the inside / outside air switching actuator 9. 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 separately driven by the inside / outside air switching actuator 9 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, the outside air introduction mode in which the first inside / outside air switching damper 6 is rotated backward and the second inside / outside air switching damper 7 is rotated backward, and the first inside / outside air switching damper 6 is rotated forward. The inside air circulation mode in which the second inside / outside air switching damper 7 is rotated forward and the first inside / outside air switching damper 6 is rotated backward and the second inside / outside air switching damper 7 is rotated forward. It is possible to switch to any mode among the three modes of the inside / outside air two-layer flow mode to be operated.

In the outside air introduction mode, the first inside / outside air switching damper 6 rotates backward and the second inside / outside air switching damper 7 rotates rearward, so that the outside air is in the first air passage R1 and the second air passage R2. Only introduced. In the inside air circulation 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 first air passage R1 and the second air passage R2 are used. Only shyness is introduced. In the inside / outside air two-layer flow mode, the first inside / outside air switching damper 6 rotates backward and the second inside / outside air switching damper 7 rotates forward, so that outside air is introduced into the first air passage R1. Then, 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 FIG. 3, 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 blade (first blade) in the blower fan 3. It is divided into a lower scroll casing 22 in which a portion provided with the two blades) 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 of the blower fan 3 can also be called blades.

Further, as shown in FIG. 4, 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.

As shown in FIG. 4, a substantially circular first bell mouth opening (upper bell mouth opening) 21a is formed on the upper wall portion of the upper scroll casing 21 so as to open inside the blower casing 2. There is. 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. The upper side of the blower fan 3 is located directly below the first bellmouth opening 21a, and therefore the first bellmouth opening 21a also faces the upper side of the blower fan 3. The upper side of the blower fan 3 is the air suction side, and the air is sucked into the upper side of the blower fan 3 from the upper side to the lower side of the blower fan 3.

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. 4, the partition plate 24 is formed with a through hole 24a for inserting the blower fan 3 from the second air passage R2 toward the first air passage R1. The diameter of the through hole 24a is larger than the outer diameter of the portion of the blower fan 3 provided with the upper blade 30. This makes it possible to insert the upper portion of the blower fan 3 into the through hole 24a from the bottom to the top of the through hole 24a.

As shown in FIG. 3, 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 on the right 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.

Inside the scroll casing 20, bell mouth components 60 shown in FIGS. 5 to 7 are provided. The bell mouth component 60 is a member that constitutes the vehicle air-conditioning blower device 1, and is composed of a member different from the scroll casing 20. By using the bell mouth component 60 that is separate from the scroll casing 20, there is an advantage that the degree of freedom in molding of the bell mouth component 60 is improved. The scroll casing 20 and the bell mouth component 60 are made of resin.

In the bell mouth component 60, a second bell mouth opening (lower bell mouth opening) 61a arranged so as to face the lower side of the blow fan 3 is formed, and the bell mouth component 60 is formed in the radial direction of the blow fan 34. It has an extended bell mouth plate portion 61 and a plurality of leg portions (supporting leg portions) 62. The bell mouth plate portion 61 and the leg portion 62 are integrally molded by, for example, an injection molding method.

As shown in FIG. 4, a substantially circular mounting hole 22d to which the bell mouth component 60 is mounted is formed on the lower wall portion of the lower scroll casing 22. The mounting hole 22d is located concentrically with the first bell mouth opening 21a and has a larger opening than the second bell mouth opening 61a. A ridge portion 22e projecting downward is formed on the peripheral edge portion of the mounting hole 22d of the lower scroll casing 22. The ridge portion 22e extends concentrically with the mounting hole 22d in the circumferential direction of the mounting hole 22d.

As shown in FIG. 5 and the like, the second bell mouth opening 61a is substantially circular and is arranged so as to be concentrically located with the first bell mouth opening 21a in a plan view. The diameter of the second bell mouth opening 61a can be made larger than the diameter of the first bell mouth opening 21a. Since the bell mouth plate portion 61 has the second bell mouth opening portion 61a, the inner edge portion of the bell mouth plate portion 61 is formed so as to form a substantially circular shape. The outer edge portion of the bell mouth plate portion 61 is also formed so as to form a substantially circular shape. The bell mouth plate portion 61 is formed in an annular shape as a whole, and the width of the bell mouth plate portion 61 is set to be substantially the same in the entire circumferential direction of the bell mouth plate portion 61.

The inner peripheral side of the bell mouth plate portion 61 is curved so as to be located upward as it approaches the second bell mouth opening 61a. The outer peripheral side of the bell mouth plate portion 61 from the curved portion is formed flat, and a plurality of drain holes 61b are formed in the flat formed portion at intervals in the circumferential direction. Has been done. That is, on the outer peripheral side of the bell mouth plate portion 61 with respect to the second bell mouth opening 61a, a drain hole 61b for draining the water on the upper surface of the bell mouth plate portion 61 to the lower side of the bell mouth plate portion 61 is provided. It is formed, and the formation of the drain hole 61b prevents water from remaining accumulated on the upper surface of the bell mouth plate portion 61.

The 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 unequal intervals. The number of drain holes 61b is three in this embodiment, but may be one or two, or four or more. The drainage hole 61b may have a circular shape, an elliptical shape, a slit shape, a rectangular shape, or the like.

The bell mouth plate 61 of the bell mouth plate 61 is provided with a fitting portion 61c that fits into the ridge portion 22e of the lower scroll casing 22. The fitting portion 61c is composed of a concave portion that opens upward, and is continuous in the circumferential direction of the second bell mouth opening 61a so as to surround the second bell mouth opening 61a. The outer peripheral wall portion 61d of the fitting portion 61c projects upward and continuously extends in the circumferential direction of the second bell mouth opening portion 61a. By inserting the ridge portion 22e of the lower scroll casing 22 into the fitting portion 61c, the fitting portion 61c is in a state of being fitted to the ridge portion 22e.

The leg portion 62 extends downward from the periphery of the opening of the drain hole 61b on the lower surface of the bell mouth plate portion 61, and supports the bell mouth plate portion 61 from below. The leg portion 62 is also a portion for arranging the bell mouth opening 61a at a predetermined height. Since the legs 62 extend downward from the periphery of the openings of the drain holes 61b, three legs 62 are provided in this embodiment. The number of legs 62 and the number of drain holes 61b do not have to match, and one may be greater than the other. The number of legs 62 is preferably 3 or more.

The leg portion 62 has a concave cross section that opens inward in the radial direction of the blower fan 3. As a result, when the blower fan 3 is rotated, the air flowing from the radial outer side to the inner side of the blower fan 3 is less likely to flow inward of the leg portion 62, so that the leg portion 62 has a drain hole 61b. It acts as a windshield that prevents the wind from reaching around the opening.

The lower end of the leg 62 is in contact with the bottom surface of the scroll casing 20. In this embodiment, although details will be described later, since the motor flange portion 5f of the motor 5 is composed of the outer peripheral portion of the cover portion 5d, the lower end portion of the leg portion 62 is the motor flange that is the bottom surface of the scroll casing 20. The leg portion 62 is supported by the motor flange portion 5f in contact with the upper surface of the portion 5f from above. Therefore, the bell mouth component 60 is supported with respect to the cover portion 5d.

The lower end of the second air passage R2 communicates with the inside of the lower scroll casing 22 via the second bellmouth opening 61a, 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 FIGS. 1 and 3, 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.

As shown in FIG. 4, the bottom wall member 23 is a cover-shaped member having a plate-shaped portion formed so as to cover the lower end portion of the lower scroll casing 22. 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 drainage passage (not shown) is formed in the bottom wall member 23. The water collected on the lower layer side is drained to the outside from the drainage passage of the bottom wall member 23.

As shown in FIGS. 2 and 3, a motor 5 is attached to the bottom wall member 23. As shown in FIG. 5, a motor mounting member 5a is provided on the peripheral edge of the motor 5. A fastening member S such as a screw can be inserted through the motor mounting member 5a and screwed into a screw hole (not shown) of the bottom wall member 23. The mounting structure of the motor 5 does not have to be a structure using the fastening member S, and may be a so-called twist lock structure.

As shown in FIG. 5 and the like, the blower fan 3 is arranged on the upper side of the motor 5. 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 resin 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 61a. The upper end of the rotating shaft 5c is located above the second bell mouth opening 61a.

The cover portion 5d is provided with an arc-shaped portion 5e that surrounds the circumference of the rotating shaft 5c. The arcuate portion 5e is arranged concentrically with the rotation axis 5c. The rotation shaft 5c projects upward from the upper end portion of the arcuate portion 5e. One arc-shaped portion 5e may be provided, or two or more arc-shaped portions 5e may be provided.

The central portion of the 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.

A motor flange portion 5f extending in the radial direction of the rotating shaft 5c is provided at the lower portion of the motor 5. The motor flange portion 5f is fixed to the bottom wall member 23 of the scroll casing 20 so as to be vertically sandwiched between the motor mounting member 5a and the bottom wall member 23 via packing (not shown). .. The motor flange portion 5f is composed of an outer peripheral portion of the cover portion 5d, and is a bottom wall portion of the scroll casing 20 as shown in FIG. 9 and the like.

(Structure of temporary holding part)
As shown in FIGS. 6 and 7, the vehicle air conditioner blower 1 motors the leg portion 62 of the bell mouth component 60 when the motor flange portion 5f of the motor 5 is in a state of being removed from the scroll casing 20. The flange portion 5f is provided with a temporary holding portion 70 for temporary holding. The temporary holding portion 70 is provided for each leg portion 62, and therefore, in the present embodiment, three temporary holding portions 70 are provided.

Temporary holding means that the bell mouth component 60 is easily displaceable with respect to the motor flange portion 5f, while the bell mouth component 60 is suppressed from being separated from the motor flange portion 5f. And the motor flange portion 5f are integrated. The reason for temporarily holding the bell mouth component 60 is to integrate the bell mouth component 60 with the motor flange portion 5f and assemble it before assembling it to the scroll casing 20 to reduce the man-hours on the assembling line. Therefore, before assembling the bell mouth component 60 and the motor flange portion 5f to the scroll casing 20, it is sufficient that the bell mouth component 60 is integrated to the extent that the bell mouth component 60 does not separate from the motor flange portion 5f, and the bell mouth component 60 is intentionally integrated. If the 60 is to be removed from the motor flange portion 5f, it can be removed without causing damage or the like, and at this time, a tool such as a driver is not required.

On the other hand, after the bell mouth component 60 and the motor flange portion 5f are assembled to the scroll casing 20, the bell mouth component 60 is sandwiched in the vertical direction by the scroll casing 20 and the motor flange portion 5f, so that the temporary holding portion 70 No need to hold by.

Further, if the bell mouth component 60 is made a separate member from the scroll casing 20, the number of parts increases, and it may be difficult to assemble the bell mouth component 60 at a target position. That is, when the bell mouth component 60 is made a separate member from the scroll casing 20 and assembled to the motor flange portion 5f of the motor 5, at least three members of the bell mouth component 60, the scroll casing 20 and the motor flange portion 5f are attached. In addition, since shape errors are allowed in each member within the manufacturing tolerance, there are variations between the motor flange portion 5f and the bell mouth component 60, and the bell mouth component 60. And the scroll casing 20 will vary, and the motor flange portion 5f and the scroll casing 20 will vary. If it is attempted to absorb the variation generated in each of these three parts, the assembling work itself becomes difficult, and at least one part of the bell mouth component 60, the scroll casing 20, and the motor flange portion 5f It is conceivable that an unreasonable force will be applied, resulting in deformation or breakage of the relevant part. On the other hand, in the temporary holding portion 70 of the present embodiment, the bell mouth component 60 is made displaceable with respect to the motor flange portion 5f before being assembled to the scroll casing 20.

Hereinafter, the temporary holding unit 70 will be described in detail. Before assembling to the scroll casing 20, the bell mouth component 60 is rotatable around the rotation shaft 5c with respect to the motor flange portion 5f, and the operator moves the bell mouth component 60 around the rotation shaft 5c. It can be rotated. The temporary holding portion 70 is in a fixed state in which the leg portion 62 is fixed to the motor flange portion 5f by a rotation operation around the rotation shaft 5c of the bell mouth component 60, and the leg portion 62 is attached to the motor flange portion 5f. It is configured to be able to switch to a non-fixed state in which it is held in a non-fixed state.

That is, as shown in FIG. 7 and the like, the temporary holding portion 70 includes a radial protrusion (first protrusion) 71 and a circumferential protrusion (second protrusion) 72 protruding from the leg 62, and a motor flange portion. A holder portion 73 projecting upward from the upper surface of 5f is provided. The radial protrusion 71 is composed of a convex portion that protrudes radially outward from the radial outer surface of the rotation shaft 5c at the lower portion of the leg portion 62. The circumferential protrusion 72 is composed of a ridge portion that protrudes from the leg portion 62 in the circumferential direction of the rotation shaft 5c and extends in the vertical direction. As shown enlarged in FIG. 14A, the lower surface of the circumferential protrusion 72 has an inclined surface 72a that gradually rises in one direction in the circumferential direction of the rotating shaft 5c. The inclined surface 72a may be configured by connecting two or more inclined surfaces having different angles.

As in the modified example shown in FIG. 14B, the curved surface 72c may be provided instead of the inclined surface 72a. Further, the inclined surface and the curved surface may be combined.

Further, a proximal end surface 72b extending in a substantially horizontal direction is formed on the other side of the inclined surface 72a on the lower surface of the circumferential protrusion 72 in the circumferential direction. The circumferential direction of the rotation axis 5c is indicated by an arrow A in FIG. 7, and the clockwise direction is defined as one of the circumferential directions, and the counterclockwise direction is defined as the other of the circumferential directions. It is also shown in FIGS. 8 and 9. In the present specification, the circumferential direction of the rotating shaft 5c may be simply referred to as a circumferential direction, and the radial direction of the rotating shaft 5c may be simply referred to as a radial direction.

As shown in FIG. 8, the holder portion 73 is integrally molded with the motor flange portion 5f, and is formed in a cylindrical shape into which the lower portion of the leg portion 62 of the bell mouth component 60 is inserted. The holder portion 73 is formed from an outer wall portion 74 located on the outer side in the radial direction, a side wall portion 75 extending radially inward from one end in the circumferential direction of the outer wall portion 74, and the other end in the circumferential direction of the outer wall portion 74. It is provided with another side wall portion 76 extending inward in the radial direction. The lower portion of the leg portion 62 of the bell mouth component 60 is inserted between the one side wall portion 75 and the other side wall portion 76, and the outer wall portion 74 is arranged radially outside the leg portion 62 in this state.

An engagement hole 74a is formed in the lower portion of the outer wall portion 74. The engagement hole 74a is formed so as to penetrate the outer wall portion 74 in the thickness direction. As shown in FIG. 10B, when the lower portion of the leg portion 62 is inserted into the holder portion 73, the radial protrusion 71 of the leg portion 62 is arranged inside the engagement hole 74a, and the upper surface of the radial protrusion 71 is engaged. It abuts and engages with the upper edge of the hole 74a from below. The height of the radial protrusion 71 may be set to such a height that the bell mouth component 60 does not separate from the motor flange portion 5f when assembled to the scroll casing 20 in the assembled state.

The vertical dimension of the engagement hole 74a is set longer than the vertical dimension of the radial protrusion 71. As a result, the radial protrusion 71 can move in the vertical direction in the engagement hole 74a (see FIG. 11). Further, the circumferential dimension of the engaging hole 74a is set longer than the circumferential dimension of the radial protrusion 71. As a result, the engaging hole 74a can be allowed to move in the circumferential direction of the radial protruding portion 71 in a state where the upper edge portion thereof is in contact with the upper surface of the radial protruding portion 71 and engaged with the engaging hole 74a. , The radial protrusion 71 becomes movable in the circumferential direction in the engagement hole 74a. That is, since the bell mouth component 60 can be displaced in both the radial and circumferential directions with respect to the motor flange portion 5f in a state where the radial protrusion 71 is arranged in the engagement hole 74a, the bell mouth configuration is configured. The member 60 is integrated with the motor flange portion 5f in a non-fixed state. The non-fixed state is a state in which the bell mouth component 60 can be displaced without being fixed in one place, and as described above, the bell mouth component 60 can move with respect to the motor flange portion 5f.

As shown in FIG. 8, the radial inner portion of the one side wall portion 75 is lower than the outer portion, and the upper surface 75a of the radial inner portion can abut on the lower surface of the circumferential protrusion 72. It is said to be a contact part. When the bell mouth component 60 is rotated in one direction in the circumferential direction, the circumferential protrusion 72 of the leg portion 62 moves in the same direction, and the inclined surface 72a of the circumferential protrusion 72 becomes the upper surface 75a of the one side wall portion 75. Contact with. When the circumferential protrusion 72 further moves in the same direction, the bell mouth component 60 is displaced upward due to the inclined surface 72a abutting on the upper surface 75a of the one side wall portion 75, and the radial protrusion 71 The upper surface approaches the upper edge of the engagement hole 74a. Then, when the circumferential protrusion 72 further moves in the same direction and the base end surface 72b of the circumferential protrusion 72 comes into contact with the upper surface 75a of the one side wall portion 75, the upper surface of the radial protrusion 71 becomes the engagement hole 74a. Engage with the upper edge (see FIGS. 12 and 13). That is, when the bell mouth component 60 is rotated in one direction until it is in a fixed state, the upper surface of the radial protrusion 71 engages with the upper edge of the engagement hole 74a, and the circumferential protrusion 72 Since the proximal end surface 72b abuts on the upper surface 75a of the one side wall portion 75, the bell mouth component 60 is prevented from being displaced in the vertical direction. In addition, the upper surface of the radial protrusion 71 engages with the upper edge of the engagement hole 74a, and the proximal end surface 72b of the circumferential protrusion 72 is in contact with the upper surface 75a of the one side wall portion 75. The frictional force between them becomes large, and the bell mouth component 60 is less likely to be displaced in the rotation direction. Therefore, the bell mouth component 60 is in a fixed state.

On the other hand, the bell mouth component 60 in the fixed state can be turned into the non-fixed state by rotating the bell mouth component 60 toward the other in the circumferential direction. When the bell mouth component 60 is rotated until it is in a non-fixed state, the circumferential protrusion 72 is separated from the upper surface 75a of the one side wall portion 75, so that the bell mouth component 60 can be displaced in the circumferential direction and the vertical direction. Become. The amount of displacement in each direction at this time can be set, for example, in the range of 1 mm or more and 3 mm or less.

(Action and effect of the embodiment)
As described above, according to the first embodiment, in the inside air circulation mode in which the inside air is introduced from the left side inside air introduction port 2a and the right side inside air introduction port 2b, the blower fan 3 rotates to cause both inside air introduction ports 2a. The inside air introduced from 2b flows through the first air passage R1 and the second air passage R2 by the upper blade 30 and the lower blade 31, and is blown to the heat exchanger as air conditioning air. Further, when both the inside air introduction ports 2a and 2b are closed and the outside air introduction port 2c is opened by the operation of the first inside / outside air switching damper 6 and the second inside / outside air switching damper 7, the outside air is introduced from the outside air introduction port 2c. Enter the outside air introduction mode. In the outside air introduction mode, the blower 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 to the heat exchanger as air conditioning air. .. Further, when both the inside 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. That is, 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.

Further, when assembling the bell mouth component 60 to the scroll casing 20, the leg portion 62 of the bell mouth component 60 is temporarily held to the motor flange portion 5f by the temporary holding portion 70 before assembling the motor flange portion 5f to the scroll casing 20. Can be done. At this time, by integrating the leg portion 62 with respect to the motor flange portion 5f in a non-fixed state, the bell mouth component 60 can be displaced with respect to the motor flange portion 5f. Therefore, when the motor flange portion 5f is attached to the scroll casing 20, there are variations between the motor flange portion 5f and the bell mouth component 60, variations between the bell mouth component 60 and the scroll casing 20, and the motor flange portion 5f and the scroll casing 20. Even if there is a variation with the scroll casing 20, the bellmouth component 60 is displaced with respect to the motor flange portion 5f to absorb the variation in each portion, and the motor flange portion 5f and the bellmouth component 60 with respect to the scroll casing 20. Can be assembled without difficulty.

Further, when adjusting the balance of the blower fan 3, the bell mouth component 60 is rotated to bring the leg portion 62 of the bell mouth component 60 into a fixed state fixed to the motor flange portion 5f. can do. As a result, even if vibration occurs when the blower fan 3 is rotated at a predetermined rotation speed, the bell mouth component 60 does not rattle, and the accuracy of balance adjustment can be improved. Further, since the bell mouth component 60 does not rattle, it becomes easy for the operator to perform the balance adjustment work.

Further, at the time of blowing air, the second bell mouth opening 61a is arranged so as to face the lower side of the blowing fan 3, so that the blowing efficiency is improved. Then, for example, when rainwater or water at the time of car washing enters the inside of the scroll casing 20 from the outside air introduction port 2c, it may collect on the upper surface of the bell mouth plate portion 61. The water on the upper surface of the bell mouth plate 61 flows from the drain hole 61b of the bell mouth plate 61 to the lower side of the bell mouth plate 61.

At this time, since the leg portion 62 extending downward is provided around the opening of the drain hole 61b on the lower surface of the bell mouth plate portion 61, the wind is suppressed from reaching around the opening of the drain hole 61b. .. Therefore, the water flowing below the bell mouth plate portion 61 is less likely to be wound up by the air sucked into the blower fan 3, so that the drainage property can be improved.

(Embodiment 2)
FIG. 15 shows a motor 5 and a bell mouth component 60 according to the second embodiment of the present invention. In the second embodiment, the configuration of the temporary holding portion 70 is different from that of the first embodiment, and the other parts are the same as those of the first embodiment. Therefore, the parts different from the first embodiment will be described in detail below. ..

As shown in FIG. 16, the temporary holding portion 70 of the second embodiment has a protruding portion 81 protruding in the radial direction of the rotation shaft 5c from the lower portion of the leg portion 62 of the bell mouth component 60, and the upper surface of the motor flange portion 5f. It is provided with a holder portion 85 provided. The protruding portion 81 projects radially outward from the radial outer surface of the rotating shaft 5c at the lower portion of the leg portion 62, and has a plate shape having a predetermined width in the circumferential direction.

The holder portion 85 includes a base portion 83a projecting upward from the upper surface of the motor flange portion 5f, a holder side plate portion 83b integrally molded on the upper portion of the base portion 83a, and a convex portion 84. The holder side plate portion 83b is provided at an interval upward from the upper surface of the motor flange portion 5f, and forms a gap between the holder side plate portion 83b and the upper surface of the motor flange portion 5f so that the protrusion 81 can be inserted from the circumferential direction. It is a part. The holder side plate portion 83b extends from the upper portion of the base portion 83a toward the other in the circumferential direction, and the gap is opened toward the other in the circumferential direction. Therefore, the protrusion 81 can be inserted into the gap by moving it in one direction in the circumferential direction.

The convex portion 84 is formed on the upper surface of the motor flange portion 5f so as to face the holder side plate portion 83b, and projects upward toward the holder side plate portion 83b. The distance between the lower surface of the holder side plate portion 83b and the upper surface (tip surface in the protruding direction) of the convex portion 84 is set to be substantially the same as or slightly narrower than the vertical dimension of the protruding portion 81.

On the other hand, the distance between the portion of the lower surface of the holder side plate portion 83b separated from the convex portion 84 in the circumferential direction and the upper surface of the motor flange portion 5f is set wider than the vertical dimension of the protruding portion 81. Specifically, a recessed portion 83c formed so as to be recessed upward is formed in a portion of the lower surface of the holder side plate portion 83b separated from the convex portion 84 in the circumferential direction. The recessed portion 83c has a size and a shape into which the protruding portion 81 can be inserted.

As shown in FIG. 16, in a state where the protruding portion 81 of the bell mouth component 60 is arranged on the other side in the circumferential direction from the holder portion 85 of the motor flange portion 5f, the bell mouth component 60 is rotated in one direction in the circumferential direction. Then, as shown in FIG. 17A, the protruding portion 81 of the bell mouth component 60 enters the holder portion 85 from the open portion of the holder portion 85. When the protruding portion 81 reaches between the lower surface of the holder side plate portion 83b and the upper surface of the convex portion 84, it is vertically sandwiched by the lower surface of the holder side plate portion 83b and the upper surface of the convex portion 84. This prevents the bell mouth component 60 from being displaced in the vertical direction. In addition, the bellmouth component 60 rotates in the rotation direction due to the frictional force between the lower surface of the holder side plate portion 83b and the upper surface of the protruding portion 81 and the frictional force between the upper surface of the convex portion 84 and the lower surface of the protruding portion 81. It becomes difficult to displace. Therefore, the bell mouth component 60 is in a fixed state.

When the bell mouth component 60 in the fixed state is further rotated toward one of the circumferential directions, as shown in FIG. 17B, the protruding portion 81 of the bell mouth component 60 is on the back side of the holder portion 85, that is, one of the circumferential directions. Move to the side. As a result, the protruding portion 81 of the bell mouth component 60 is separated from the convex portion 84, so that the bell mouth component 60 can be displaced in the circumferential direction and the vertical direction.
In particular, by inserting the protruding portion 81 of the bell mouth component 60 into the recessed portion 83c, the amount of vertical displacement of the bell mouth component 60 can be increased.

According to the second embodiment, as in the first embodiment, when the bell mouth component 60 is made of a member different from the casing 2, the accuracy of the balance adjustment of the blower fan 3 can be absorbed while absorbing the variation of each part. It is possible to improve the workability at the time of balance adjustment.

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 described above, the vehicle air conditioner blower according to the present invention can be used, for example, as a blower unit of the 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 5f Motor flange part 60 Bellmouth component 61a Bellmouth opening 62 Leg 70 Temporary holding part 71 Radial protrusion Part (first protruding part)
72 Circumferential protrusion (second protrusion)
72a Inclined surface 72b Base end surface 73 Holder part 74a Engagement hole 75a Top surface 81 Protruding part 83a Base part 83b Holder side plate part 84 Convex part R1 First air passage R2 Second air passage

Claims (8)

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 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. Is formed inside, and a casing containing an inside / outside air switching damper that opens / closes the inside air introduction port and the outside air introduction port, and
A centrifugal fan, which is arranged inside the casing and has a first blade and a second blade,
A motor that is disposed below the blower fan and has a vertically extending rotation shaft that drives the blower fan to rotate, and extends in the radial direction of the rotation shaft and is fixed to the bottom wall portion of the casing. A motor with a flange and
A bell mouth that is a separate member from the casing and has a bell mouth opening arranged so as to face the lower side of the blower fan and a support leg portion for arranging the bell mouth opening at a predetermined height. Equipped with components
The first blade of the blower fan blows the air in the first air passage as air conditioning air, and the second blade of the blower fan blows the air in the second air passage as air conditioning air. In a vehicle air-conditioning fan configured to
A temporary holding portion for temporarily holding the support leg portion to the motor flange portion when the motor flange portion is removed from the casing is provided.
The temporary holding portion is in a fixed state in which the support leg portion is fixed to the motor flange portion by a rotation operation of the bell mouth component member around the rotation axis, and the support leg portion is attached to the motor flange portion. A blower for vehicle air conditioning, which is characterized by being able to switch between a non-fixed state and a non-fixed state. In the vehicle air-conditioning blower according to claim 1,
The temporary holding portion includes a first protruding portion protruding in the radial direction of the rotating shaft from the lower portion of the supporting leg portion, a second protruding portion protruding in the circumferential direction of the rotating shaft from the supporting leg portion, and the motor. It is provided with a holder portion that protrudes upward from the upper surface of the flange portion and into which the lower portion of the support leg portion is inserted.
The holder portion has an engaging hole that allows the first protruding portion to move around the axis of rotation in a state of being engaged with the upper surface of the first protruding portion, and until the bell mouth component is fixed. It is characterized by having a contact portion that abuts on the lower surface of the second protrusion when rotated in one direction, and separates from the second protrusion when rotated until it is in a non-fixed state. Blower for vehicle air conditioning. In the vehicle air-conditioning blower according to claim 2,
A vehicle air-conditioning blower having a lower surface of the second protruding portion gradually increasing in one direction. In the vehicle air-conditioning blower according to claim 2 or 3.
The vertical dimension of the engaging hole is set to be longer than the vertical dimension of the first protrusion. In the vehicle air-conditioning blower according to claim 1,
The temporary holding portion includes a protruding portion protruding in the radial direction of the rotating shaft from the lower portion of the supporting leg portion, and a holder portion provided on the upper surface of the motor flange portion.
The holder portion is provided at a distance upward from the upper surface of the motor flange portion, and the holder side plate portion forms a gap between the holder portion and the upper surface of the motor flange portion so that the protrusion can be inserted from the circumferential direction. And a convex portion formed on a portion of the upper surface of the motor flange portion facing the holder side plate portion.
The distance between the tip surface of the convex portion and the lower surface of the holder side plate portion is set to be the same as the vertical dimension of the protruding portion or narrower than the vertical dimension of the protruding portion.
The distance between the portion of the lower surface of the holder side plate portion separated from the convex portion in the circumferential direction of the rotation axis and the upper surface of the motor flange portion is set wider than the vertical dimension of the protruding portion. A blower for vehicle air conditioning. In the vehicle air-conditioning blower according to claim 5,
The holder portion includes a base portion that projects upward from the upper surface of the motor flange portion.
A vehicle air-conditioning blower characterized in that the holder side plate portion is integrally molded on the upper portion of the base portion. In the vehicle air-conditioning blower according to any one of claims 1 to 6.
The bell mouth component is a blower for vehicle air conditioning, characterized in that the motor flange portion is vertically sandwiched between the casing and the motor flange portion when the motor flange portion is assembled to the casing. .. In the vehicle air-conditioning blower according to any one of claims 1 to 7.
The bell mouth component has a bell mouth plate portion that is formed with the bell mouth opening and extends in the radial direction of the blower fan.
The bell mouth plate portion is provided with a fitting portion that fits into a ridge portion formed in the casing.

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