JP2008155654A - Vehicular air blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air blower having machining property of a shutter door not varied with conventional, straightening flowing air and capable of enhancing suction efficiency. <P>SOLUTION: The vehicular air blower is provided with: an air guiding flap 14 mounted to the shutter door 12 turnably/movably in a parallel provision direction of both taking-in ports (10, 11) along an inner surface of the shutter door 12; and a movable rod 16 for relatively turning the flap 14 relative to the shutter door 12 in the parallel provision direction of both taking-in ports (10, 11) interlocking with turning of the shutter door 12 in the parallel provision direction (arrow A1 direction) of both taking-in ports (10, 11). Further, the movable rod 16 is set so as to straighten air introduced from one of both taking-in ports (10, 11) opened by the shutter door 12 into an air introduction case part 7 toward an air blower fan (blower fan 5) so as to guidably direct the flap 14. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle blower used for, for example, a vehicle air conditioner.

  In general, in an air conditioner for a vehicle such as an automobile, air outside the vehicle compartment (outside air) and air inside the vehicle compartment (inside air) are selectively sucked in by a blower device and air conditioning such as temperature adjustment is performed. Etc. can be blown out.

  In such a blower, for example, an internal air intake and an external air intake are provided on the upstream side of the blower fan, and one of the two intakes is closed by a rotary door whose outer peripheral surface is an arc, and the other of the two intakes is connected. It is known that the inside air and the outside air can be selectively sucked into the vehicle air conditioner by opening.

As such an air blower, one in which an air guide protrusion for uniforming the flow of sucked air is provided on the inner peripheral surface of the rotary door is known (for example, see Patent Document 1). .
Japanese Patent No. 3622299

  However, in the conventional delivery device, since the air guide protrusion is formed integrally with the rotary door, at least two of the first guide portion of the air flowing in from the inside air inlet and the second air guide portion flowing in from the outside air inlet. It is necessary to provide one. For this reason, the shape of the rotary door is complicated, and it is difficult to say that the workability of the rotary door (shutter door) is necessarily good.

  Therefore, an object of the present invention is to provide a vehicle blower that can improve the suction efficiency by rectifying the inflowing air without changing the workability of the shutter door.

In order to achieve this object, the present invention provides an air introduction case portion provided on the upstream side of the blower fan, an internal air intake port provided in the air introduction case portion, and the internal air intake port. Advancing and retreating in the direction in which the two intakes are juxtaposed to the air introduction case via an outside air intake provided in the air introduction case and a door rotation shaft positioned downstream of the two intakes In a vehicle air blower provided with a shutter door that is attached to be capable of selectively opening and closing the inside air inlet and the outside air inlet,
An air guide flap attached to the shutter door so as to be rotatable in the direction in which the both intakes are arranged along the inner surface of the shutter door, and the direction in which the both intakes of the shutter door are arranged in parallel. And a flap rotating means for rotating the flap relative to the shutter door in the juxtaposed direction with respect to the shutter door in conjunction with the rotation, and the flap rotating means is opened by the shutter door. It is set as the vehicle air blower set so that the flap may be directed so that air introduced into the air introduction case part from one of the intake ports can be rectified and guided toward the air blowing fan. Features.

  According to this configuration, the processability of the shutter door is the same as before, and the inflowing air can be rectified to improve the suction efficiency.

Embodiments of the present invention will be described below with reference to the drawings.
[Constitution]
1 and 2 are schematic cross-sectional views showing an example of a vehicle blower used in a vehicle air conditioner. 1 and 2, a vehicle blower includes a blower main body (blower main body) 1 and an inflow air switching device (introduction air) that is positioned upstream of the blower main body 1 and that flows in (introduces) inside and outside air. Switching device) 2.

  The blower body 1 includes a fan case 3 having a bottom wall 3a and an upper wall 3b, and a drive motor 4 fixed to the lower surface of the bottom wall 3a. The drive motor 4 has a rotation output shaft 4a, and the rotation output shaft 4a protrudes into the fan case 3 through the bottom wall 3a. The blower body 1 has a blower fan (blower fan) 5 that is rotatably disposed in a fan case 3. The blower fan 5 is attached to the rotation output shaft 4 a and is driven to rotate by the drive motor 4. The air sucked into the blower body 1 is sent to an evaporator, a heater core or the like of a vehicle air conditioner (not shown) and air-conditioned, and then blown into the vehicle interior. In addition, since a well-known structure can be employ | adopted about this structure, the detailed description is abbreviate | omitted. Reference numeral 6 denotes a suction opening of the blower body 1 and is provided on the upper wall 3b.

  The inflow air switching device 2 includes an air introduction case portion 7 that is disposed on the upstream side of the blower body 1 and that is formed integrally with the upper wall 3 a of the fan case 3. 1 and 2 communicates with the suction opening 6 of the blower body 1. Moreover, the air introduction case part 7 has a pair of engaging walls 7a and 7b which are located in the upstream and are provided at intervals on the left and right. A ventilation path (opening) 8 is formed between the engagement walls 7a and 7b.

  Further, an air filter 9 disposed below (on the downstream side) the ventilation path 8 is attached to the air introduction case portion 7. The air filter 9 divides the inside of the air introduction case portion 7 into upper and lower chambers A and B. Further, the air introduction case portion 7 has an inside air intake (inside air introduction port) 10 and an outside air intake (outside air introduction port) 11 located on the upstream side of the blower fan 5. The inside air inlet 10 and the outside air inlet 11 are arranged side by side adjacent to each other in FIG.

  Further, as shown in FIG. 1, the air introduction case portion 7 is formed with a door arrangement space C located between the inside air inlet 10 and the outside air inlet 11 and the ventilation path 8. This door installation space C has opposing side walls 7c and 7c as shown in FIG. In this door arrangement space C, a shutter door 12 for switching between opening and closing of the inside air inlet 10 and the outside air inlet 11 is arranged.

  As shown in FIGS. 3 and 4, the shutter door 12 has side walls 12 a and 12 a facing each other. As shown in FIGS. 3 and 4, the side wall 12a has an acute end portion 12a1 and an arcuate edge portion 12a2 opposite to the end portion 12a1, and the side surface has a sector shape (sector shape). Is formed.

  Door rotation shafts 13 and 13 having the same axis are integrally formed on the outer surfaces of the end portions 12a1 and 12a1 of the side walls 12a and 12a. Further, as shown in FIGS. 3 and 4, the shutter door 12 has a continuous wall 12 b that connects arcuate edges 12 a 2 and 12 a 2 of the side walls 12 a and 12 a. As shown in FIG. 1, the cross-sectional shape of the continuous wall 12 b is formed in a circular arc so that the axis of the door rotation shafts 13, 13 is the center of curvature (center of radius).

  As shown in FIG. 4, the door rotation shafts 13 and 13 are rotatably attached to the side walls 7c and 7c of the door installation space C, and the shutter door 12 is connected to the inside air intake port 10 and the outside air in FIG. The inlets 11 are held on the side walls 7c and 7c so as to be rotatable in the direction in which the intakes 11 are arranged side by side (the direction indicated by arrow A1). Although illustration is omitted, one of the rotation shafts 13 and 13 can be rotated by a door rotation operation means such as a drive motor, solenoid or manual operation knob not shown. Yes.

  Further, a flap 14 is disposed between the side walls 12a of the shutter door 12 as shown in FIG. The flap 14 is attached to the side walls 12a and 12a via the flap rotation shaft 14a so that the free edge portion can be rotated in the direction in which the inside air inlet 10 and the outside air inlet 11 are juxtaposed (the direction indicated by the arrow A1). It has been. Here, assuming a meridian R through which the angles α and β formed through the door rotation shaft 13 and the edges 12a3 and 12a3 of the side wall 12a in the direction of arrow A1 are equal, the center of the flap rotation shaft 14a is It is located on the meridian O.

  Further, as shown in FIGS. 1 and 2, on the inner surface of the continuous wall 12b of the shutter door 12, a rod extending in the direction in which the inside air inlet 10 and the outside air inlet 11 are juxtaposed (the direction indicated by the arrow A1). A guide 15 is fixed. As shown in FIG. 4, the rod guide 15 is disposed at the approximate center between the side walls 12a and 12a, and a guide hole 15a extending in the direction of arrow A1 is formed between the rod guide 15 and the connecting wall 12b. Is formed. In this guide hole 15a, a movable rod 16 having a rectangular cross section is held as a flap rotating means so as to be slidable in the direction of arrow A1.

  When the movable rod 16 has one end portion 16a and one edge portion 12b1 in the direction of arrow A1 of the connecting wall 12b in contact with the engaging wall 7a as shown in FIG. 2, the other end portion 16b is an arrow of the connecting wall 12b. A predetermined amount protrudes from the other edge portion 12b2 in the A1 direction. Similarly, when the movable rod 16 has the other end portion 16b and the other edge portion 12b2 of the connecting wall 12b in the arrow A1 direction in contact with the engaging wall 7b as shown in FIG. 1, the one end portion 16a is connected to the connecting wall 12b. A predetermined amount protrudes from one edge 12b1 in the arrow A1 direction.

Moreover, as shown in FIGS. 4 to 6, an engagement hole 17 is formed at the center in the longitudinal direction of the movable rod 16, and extends in the longitudinal direction of the rod guide 15 at the center in the longitudinal direction of the rod guide 15. A slit 18 is formed. An engaging shaft 19 is integrally provided at a free edge facing the continuous wall 12b of the flap 14. The engagement shaft 19 is inserted through the slit 18 into the engagement hole 17 of the movable rod 16 so as to be rotatable in the direction of the arrow A1.
[Action]
Next, the operation of the vehicle blower having such a configuration will be described.

In the vehicle blower of this configuration, the shutter is operated by rotating one of the rotating shafts 13 and 13 by a door rotating operation means such as a drive motor or solenoid (not shown) or an operation knob for manual operation. The door 12 is rotated in the direction in which the inside air inlet 10 and the outside air inlet 11 are juxtaposed (the direction indicated by the arrow A1), and the shutter door 12 is connected to one of the inside air inlet 10 and the outside air inlet 11 as shown in FIG. It can be selectively closed (shielded) as shown in FIG.
(Outside air suction)
Moreover, when the shutter door 12 is turned to the inside air intake 10 side from the state in which the shutter door 12 is closed (shielded) as shown in FIG. The end 16b first comes into contact with the engagement wall 7b, and the rotation of the movable rod 16 is prevented. When the shutter door 12 is further rotated to the engagement wall 7b side from this state, it moves relative to the movable rod 16 until the continuous wall 12b contacts the engagement wall 7b.

  At this time, the movable rod 16 moves the shutter door 12 with respect to the flap 14 until the flap 14 changes from the state of FIG. 2 to the state of FIG. That is, the movable rod 16 rotates the flap 14 relative to the shutter door 12 around the flap rotation shaft 14a until the flap 14 changes from the state of FIG. 2 to the state of FIG. Is directed upward and downward on the inside air intake 10 side. When the continuous wall 12b comes into contact with the engagement wall 7b, one end 16a of the movable rod 16 protrudes from the continuous wall 12b toward the outside air inlet 11 as shown in FIG.

  When the blower fan 5 is rotated by the drive motor (blower motor) 4 in this state, air outside the vehicle is sucked into the air introduction case portion 7 from the outside air intake port 11 as indicated by arrows D1, D2, and D3. The air sucked into the air introduction case portion 7 as shown by the arrows D1 and D2 from the engagement wall 7a side and the intermediate portion in the direction of the arrow A1 of the outside air inlet 11 passes through the communication passage 8 and the air filter 9. Flows up.

  The air introduction case 7 is wider than the outside air intake 11. For this reason, assuming that there is no flap 14, the air sucked into the air introduction case portion 7 from the shutter door 12 side deviates from the position corresponding to the suction opening 6 of the blower body 1. That is, as shown by the broken line arrow D3 ', it flows so as to diffuse toward the engagement wall 7b. In this state, since the path from the outside air intake 11 into the air introduction case portion 7 until the air is sucked into the blower body 1 from the suction opening 6 becomes longer as indicated by the arrow D3 ', the suction efficiency is poor. Become.

However, since the flap 14 is actually provided, a part of the air sucked into the air introduction case portion 7 from the shutter door 12 side as shown by the arrow D3 flows to the shutter door 12 side. The flow is deflected (rectified) by 14 to the side corresponding to the lower suction opening 6. As a result, as shown by the arrow D3 from the shutter door 12 side, the air sucked into the air introduction case portion 7 has a shorter path to the suction opening 6 and the suction efficiency is improved.
(Inside air suction)
Further, when the shutter door 12 is turned to the outside air inlet 11 side from the state in which the shutter door 12 closes (shields) the interior air inlet 10 as shown in FIG. 1, one end of the movable rod 16 held by the shutter door 12. The portion 16a first contacts the engagement wall 7a, and the rotation of the movable rod 16 is prevented. When the shutter door 12 is further rotated toward the engagement wall 7a from this state, the shutter 12 moves relative to the movable rod 16 until the continuous wall 12b contacts the engagement wall 7a.

  At this time, the movable rod 16 moves the shutter door 12 with respect to the flap 14 until the flap 14 changes from the state of FIG. 1 to the state of FIG. That is, the movable rod 16 rotates the flap 14 relative to the shutter door 12 around the flap rotation shaft 14a until the flap 14 changes from the state of FIG. 1 to the state of FIG. Is directed upward and downward on the outside air intake 11 side. When the continuous wall 12b comes into contact with the engaging wall 7a, the other end 16b of the movable rod 16 protrudes from the continuous wall 12b toward the inside air inlet 10 as shown in FIG.

  When the blower fan 5 is rotated by the drive motor (blower motor) 4 in this state, the air (inside air) in the vehicle compartment from the inside air inlet 10 enters the air introduction case portion 7 as indicated by arrows E1, E2, E3. Inhaled. Then, air (inside air) sucked into the air introduction case portion 7 as shown by arrows E1 and E2 from the intermediate wall portion in the arrow A1 direction of the engagement wall 7b side and the inside air inlet 10 passes through the communication path 8. It flows to the air filter 9.

  Note that the inside of the air introduction case portion 7 is wider than the inside air intake 10. Therefore, assuming that there is no flap 14, the air (inside air) sucked into the air introduction case portion 7 from the shutter door 12 side as indicated by the arrow E <b> 3 is a position corresponding to the suction opening 6 of the blower body 1. So as to diffuse away from the engaging wall 7a as shown by the broken arrow E3 '. In this state, since the path from which the air sucked into the air introduction case part 7 from the inside air intake port 10 is sucked into the blower body 1 from the suction opening 6 becomes longer as indicated by the arrow E3 ', the suction efficiency is poor. Become.

However, since the flap 14 is actually provided, a part of the air (inside air) sucked into the air introduction case portion 7 from the shutter door 12 side as shown by the arrow E3 flows to the shutter door 12 side. However, the flow is deflected (rectified) to the side corresponding to the lower suction opening 6 by the flap 14. As a result, as shown by the arrow E3 from the shutter door 12 side, the air (inside air) sucked into the air introduction case portion 7 has a short path to the suction opening 6 and the suction efficiency is improved.
(Experimental example)
FIG. 7 shows the rotational speed N, static pressure Ps (Pa) of the blower fan 5 of the vehicle blower, the input Pin (W) to the drive motor 4 and the overall efficiency ηt, and the air volume (air flow) G from the blower fan 5. It shows the relationship.

  In FIG. 7, the rotational speed N, static pressure Ps (Pa), input Pin (W) to the drive motor 4 and total efficiency ηt when the flap 14 is provided on the shutter door 12 are indicated by a one-dot chain line. The rotation speed N, static pressure Ps (Pa), input Pin (W) to the drive motor 4 and the overall efficiency ηt when the rectifying protrusion is integrally formed on the inner surface of the door 12 instead of the flap 14 are solid lines. It is shown.

  As can be seen from FIG. 8, the rotational speed N with respect to the air volume G, the static pressure Ps (Pa), the input Pin (W) to the drive motor 4, the total efficiency ηt, and the like are the same as when the flap 14 is provided on the shutter door 12. Substantially the same results were obtained when the rectifying protrusions were integrally formed on the inner surface of the shutter door 12 instead of the flap 14.

  As a result, even if the flap 14 is provided on the shutter door 12 in the vehicle blower as in the above-described embodiment, the workability of the shutter door 12 remains the same as before, the inflowing air is rectified, the suction efficiency, etc. Was able to improve.

  In addition, the angle of the flap 14 when one of the inside air intake port 10 and the outside air intake port 11 is selectively closed by the shutter door 12 is adjusted by providing the movable rod 16 described above so that the expansion and contraction can be adjusted from a plurality of rods. It can also be possible.

  As described above, the vehicle blower according to the embodiment of the present invention is provided in the air introduction case portion 7 provided on the upstream side of the blower fan (blower fan 5) and the air introduction case portion 7. An inside air inlet 10, an outside air inlet 11 provided in parallel with the inside air inlet 10 and provided in the air introduction case portion 7, and a door positioned on the downstream side of the both inlets (10, 11) The air intake case portion 7 is attached to the air introduction case portion 7 via a rotation shaft 13 so as to be able to advance and retreat in the direction in which the both intake ports (10, 11) are juxtaposed, and opens and closes the inside air intake port 10 and the outside air intake port 11 Is provided with a shutter door 12 for selectively performing the above. Moreover, the air blower for a vehicle is provided with an air guide flap 14 attached to the shutter door 12 so as to be rotatable along the inner surface of the shutter door 12 in the direction in which the intake ports (10, 11) are arranged side by side. In conjunction with the rotation of the shutter doors 12 in the direction in which the both inlets (10, 11) are juxtaposed (in the direction of arrow A1), 11) flap rotation means (movable rod 16) for relative rotation in the juxtaposed direction. In addition, the flap rotating means (movable rod 16) is configured to supply the air introduced into the air introduction case portion 7 from one of the intake ports (10, 11) opened by the shutter door 12 to the blower fan. The flap 14 is set so as to be directed so as to be rectified and guided toward the (blower fan 5).

  According to this configuration, when the shutter door 12 is rotated in the side-by-side direction (arrow A1 direction) of the both intakes (10, 11) and one of the both intakes (10, 11) is closed, The flap 14 can be directed up and down at a position close to the other of the two inlets (10, 11). As a result, air introduced into the air introduction case portion 7 from one of the intake ports (10, 11) can be rectified and guided by the flap 14 toward the blower fan (blower fan 5). The workability of No. 12 is the same as before, and the inflowing air can be rectified to improve the suction efficiency and the like.

  In the vehicle blower according to the embodiment of the present invention, the flap 14 is connected to the shutter door 12 in the juxtaposition direction (arrow A1) via a flap rotation shaft 14a parallel to the axis of the door rotation shaft 13. The edge of the flap 14 is provided so as to be slidable along the inner surface of the shutter door 12. Further, the flap rotating means (movable rod 16) extends in the direction in which the both intakes (10, 11) are arranged side by side (in the direction of arrow A1) and is arranged in the direction in which the shutter door 12 is arranged in parallel (indicated by the arrow). A movable rod 16 movably mounted in the (A1 direction) is used, and the edge of the flap 14 is rotatable relative to the juxtaposed direction (arrow A1 direction) at an intermediate position in the longitudinal direction of the movable rod 16. When the shutter door 12 closes one of the two inlets (10, 11), the movable rod 16 is engaged with the movable door 16 when the shutter door 12 closes one of the inlets (10, 11). 10, 11) engaging portions (engaging walls 7 a, 7 b) that are moved to the other side of the air introducing case portion 7 are provided.

  According to this configuration, when closing one of the two intake ports (10, 11) with a simple configuration, one flap 14 is directed up and down at a position close to the other of the two intake ports (10, 11). Can do.

  In the vehicle blower according to the embodiment of the present invention, when the shutter door 12 closes one of the intake ports (10, 11), the movable rod 16 is an edge in the rotational direction of the shutter door 12. A predetermined amount protrudes from the portion to the other side of the intake ports (10, 11).

  According to this configuration, when closing one of the two intake ports (10, 11) with a simpler configuration, one flap 14 is directed up and down at a position close to the other of the two intake ports (10, 11). be able to.

It is a schematic sectional drawing of the air blower for vehicles which concerns on this invention. It is a schematic sectional drawing explaining the effect | action of the air blower for vehicles which concerns on this invention. It is a schematic perspective view of the shutter door shown in FIG. It is sectional drawing which follows the V1-V1 line | wire of FIG. It is the elements on larger scale of FIG. It is explanatory drawing which shows the relationship between the rod guide of FIG. 1, and a movable rod. It is a characteristic line figure which shows the experimental example of the air blower for vehicles which concerns on this invention.

Explanation of symbols

4 ... Blower fan
7 ... Air introduction case portions 7a, 7b ... engagement walls (engagement means)
DESCRIPTION OF SYMBOLS 10 ... Inside air inlet 11 ... Outside air inlet 12 ... Shutter door 14 ... Flap 16 ... Movable rod (flap rotation means)

Claims (3)

An air introduction case provided on the upstream side of the blower fan, an internal air intake provided in the air introduction case, and an external air intake provided in the air introduction case in parallel with the internal air intake And is attached to the air introduction case portion so as to be capable of moving forward and backward in the direction in which the both intakes are arranged in parallel via a door rotation shaft positioned downstream of the both intakes, In a vehicle air blower comprising a shutter door that selectively opens and closes the outside air inlet,
An air guide flap attached to the shutter door so as to be rotatable and movable in the juxtaposition direction of the two intake ports along the inner surface of the shutter door;
Flap rotating means for rotating the flap relative to the shutter door in the juxtaposed direction of the shutter doors in conjunction with the pivoting of the shutter doors in the juxtaposed direction;
The flap rotation means directs the flap so that air introduced into the air introduction case from one of the intake ports opened by the shutter door can be rectified and guided toward the blower fan. A vehicle blower characterized by being set as described above. 2. The vehicle blower device according to claim 1, wherein the flap is rotatably attached to the shutter door in the juxtaposed direction via a flap rotation shaft that is parallel to an axis of the door rotation shaft, and The edge of the flap is provided so as to be slidable along the inner surface of the shutter door,
The flap rotating means uses a movable rod that extends toward the side-by-side direction of the two intake ports and is attached to the shutter door so as to be movable in the side-by-side direction. The movable rod is held at an intermediate position in the longitudinal direction of the movable rod so as to be relatively rotatable in the juxtaposed direction. When the shutter door closes one of the intake ports, the movable rod is engaged with the movable rod. An air blower for a vehicle, wherein an engagement portion for moving the shutter door to the other side of the two intake ports is provided in the air introduction case portion.   2. The blower for a vehicle according to claim 1, wherein when the shutter door closes one of the two inlets, the movable rod moves from an edge of the shutter door in the rotational direction to the other side of the two inlets. A vehicular air blower characterized by protruding a predetermined amount.

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