JP2006199092A - Blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blower, restraining the generation of large noise while sufficiently sucking the air. <P>SOLUTION: This blower includes: an intake case 4 fitted to an air intake port 8 of a casing 3 storing a fan 2 driven in rotation and provided with an inside air introduction port 11 and an outside air introduction port 12 respectively communicating with the air intake port 8; and a switching door 20 in which a plate-like closed part 23 is formed integrally with a rotating shaft 21 by a connecting part 22 provided at both ends of the closed part 23, which is rotatably disposed in the interior of the intake case 4 so that the inside air introduction port 11 is fully opened at one end of a rotary area and also the outside air introduction port 12 is totally closed by the closed part 23, and so that the inside air introduction port 11 is totally closed at the other end of the rotary area and also the outside air introduction port 12 is fully opened. In the blower, at least one side 22a of the connecting part 22 is provided with a ventilating hole 25 penetrating in the board thickness direction and a region of the intake case 4 opposite to the ventilating hole 25 is provided with a turning part 27 for guiding the air to the air intake port 8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a blower that supplies air to an air conditioning unit for a vehicle.

  A conventional blower described in Patent Document 1 is shown in FIG. This blower is configured by attaching an intake case 110 that takes in internal and external air and supplies air to the casing 100 on the upper portion of the casing 100.

  The casing 100 accommodates a centrifugal multiblade fan (fan) 101 that is rotationally driven by a fan drive motor 102. A bell mouth 104 having an air intake port 103 opened is provided on the upper portion of the fan 101 in the casing 100.

  The intake case 110 is attached to the casing 100 while being opened to the inside air introduction port 111 and the outside air introduction port 112, so that these introduction ports 111 and 112 communicate with the inside of the casing 100. In addition, a switching door 113 that switches between inside and outside air is disposed inside the intake case 110. The switching door 113 is rotated about the door shaft 114 to close one of the inlets 111 and 112 and open the other, so that the inside air and the outside air can be switched and introduced. Inside air or outside air is supplied to the casing 100.

Such a blower is disposed on the back side of the instrument panel in the passenger compartment while being attached to the unit case of the vehicle air conditioning unit.
Japanese Patent Laid-Open No. 10-175416

  In a vehicle, a cross car beam C, which is a vehicle body structure, is generally disposed on the back side of an instrument panel. The cross car beam C extends in the vehicle width direction within the instrument panel, and thus the vehicle body. It works to reinforce. Such a cross car beam C is often arranged near the inside air inlet 111 of the intake case 110 due to the structure of the instrument panel. In this case, the cross car beam C is sucked into the intake case 110 from the inside air inlet 111. Air resistance.

  For this reason, there is a problem that it is difficult to suck sufficient air into the intake case 110. Further, there is a problem that a large noise is generated by the cross car beam C when air is sucked into the intake case 110.

  The present invention can sufficiently suck in air and suppress the generation of a large noise even when such a body structure such as the cross car beam C is disposed in the vicinity. An object is to provide a blower capable.

  The invention described in claim 1 is an intake case that is attached to an air intake port of a casing that accommodates a fan that is driven to rotate, and that has an inside air introduction port and an outside air introduction port that respectively communicate with the air intake port. The closed portion is formed integrally with the rotary shaft by connecting portions provided at both ends of the closed portion, and is disposed rotatably inside the intake case, while the inside air inlet is fully opened at one end side of the rotation area. The air blower provided with a switching door that fully closes the outside air introduction port by the closing portion, and fully opens the outside air introduction port while fully closing the inside air introduction port by the closing portion on the other end side of the rotation region, One of the connecting parts is formed with a ventilation hole penetrating in the thickness direction, and a turning part for guiding air to the air intake is formed at a portion of the intake case facing the ventilation hole.

  Invention of Claim 2 is a blower of Claim 1, Comprising: The said connection part is provided with the cone shape which becomes wide toward a closing part from a rotating shaft, The said turning part follows this cone-shaped slope. It is characterized by having a flat surface.

  According to the present invention, the ventilation hole is formed in the connecting portion of the switching door in the intake case, and the inside air or the outside air selectively introduced into the intake case passes through the ventilation hole and is turned in the intake case. And is introduced from the turning section to the air intake. For this reason, inside air and outside air can be smoothly supplied into the casing, and a sufficient amount of air can be secured.

  Thereby, the inside air inlet and the outside air inlet of the intake case can be arranged at positions away from the vehicle structure such as a cross car beam, and the increase in air resistance due to the vehicle structure is eliminated, and the vehicle structure It is also possible to suppress the occurrence of large noise caused by the noise.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is an exploded perspective view of an intake case, FIG. 3 is a cross-sectional view showing an arrangement with a vehicle structure, and FIG. 4 is a plan view showing an air flow. is there.

  As shown in FIGS. 1 and 3, the blower 1 of this embodiment includes a casing 3 that houses a fan 2 and an intake case 4 that is attached to the casing 3.

  The fan 2 is a centrifugal multiblade fan or the like, and is driven to rotate by driving a fan driving motor 5 provided on the outer surface of the casing 3. As shown in FIG. 4, a scroll casing in which the air passage 6 gradually increases in cross section around the fan 2 is used as the casing 3. The terminal portion of the air passage 6 is opened to form an air outlet 7, and air is supplied from the air outlet 7 into the unit case of the air conditioner.

  The suction of the air into the casing 3 is performed from above the fan 2 in the figure, and a bell mouth 9 having an air intake port 8 is provided above the fan 2 in the casing 3.

  The intake case 4 is attached to the casing 3 so as to face the bell mouth 9. In this embodiment, as shown in FIG. 4, the intake case 4 includes two members, a first case 4a and a second case 4b, and the intake case 4 is configured by abutting these cases 4a and 4b. It is like that.

  The intake case 4 takes inside air and outside air into the inside, and therefore, the inside air introduction port 11 and the outside air introduction port 12 are opened. These inlets 11 and 12 are formed in the first case 4 a, and open at the side surface portion of the intake case 4 when the intake case 4 is assembled. The inside air introduction port 11 includes a main inside air introduction port 11a provided on an arcuate curved surface and an auxiliary inside air introduction port 11b provided on a fan-like plane provided on an arcuate edge of the arcuate curved surface. It is configured and the ventilation resistance at the time of air introduction is reduced by ensuring a sufficient opening area, and noise generation is prevented. The intake case 4 has an opening at the bottom facing the bell mouth 9 in order to supply the inside air and the outside air introduced into the casing 3 from the bell mouth 9 into the casing 3 through the air intake port 8. And in the inside of such an intake case 4, the switching door 20 which switches inside air and outside air is arrange | positioned.

  As shown in FIGS. 2 to 4, the switching door 20 includes a plate-like main closing portion 23 a constituting the closing portion 23, a substantially fan-shaped connecting portion 22, and a rotating shaft 21. The connecting portions 22 provided at both ends are integrally formed including the rotating shaft 21. The rotating shaft 21 is supported by a support portion 4 c formed on the intake case 4, so that the switching door 20 can rotate within the intake case 4.

  The main closing portion 23a is a rectangular plate-like member that is curved in an arc shape, and closes the outside air introduction port 12 and the main inside air introduction port 11a on the outer surface side 26a, and air along the surface of the inner surface side 26b. The direction of the air flow introduced into the intake case 4 is directed to the air intake 8.

  The connection part 22 is comprised from the ventilation member 22a and the connection member 22b, and each is provided in the circular-arc-shaped both-ends edge part of the main closing part 23a.

  The ventilation member 22a has a substantially conical surface shape, and a support shaft 21a that constitutes the rotation shaft 21 is provided at the top. A plurality of ventilation holes 25 penetrating in the plate thickness direction are provided. The vent hole 25 communicates the inner and outer surfaces of the connecting portion 22, and the inside air or the outside air introduced into the intake case 4 passes through and flows out between the connecting portion 22 and the intake case 4. Yes.

  The connecting member 22b has a substantially fan shape, and a support shaft 21b that constitutes the rotary shaft 21 is provided at the top. Further, the connecting member 22b slides along the wall surface of the intake case 4 provided with the auxiliary inside air introduction port 11b in a state where the switching door 20 is mounted in the intake case 4, and the main inside air introduction port 11a. Is closed by the main closing portion 23a, the auxiliary inside air introduction port 11b is closed, and the main inside air introduction port 11a is opened by the main closing portion 23a so as to open the auxiliary inside air introduction port 11b. The closing portion 23 is also configured as an auxiliary closing portion for opening and closing the auxiliary inside air introduction port 11b.

  Note that the support shafts 21a and 21b constituting the rotary shaft 21 are provided so as to be linearly positioned on the same axis.

  Further, a sealing material 24 is installed on the outer peripheral edge of the closing portion 23 composed of the main closing portion 23a and the connecting member 22b, and the closing portion 23 closes the inside air introduction port 11 and the outside air introduction port 12. In this state, the air introduced into the intake case 4 is configured not to flow into the closed inlet.

  The switching door 20 has the above-described configuration, so that the outside air introduction port (12) is fully closed by the closing portion 23 while the inside air introduction port 11 is fully opened on one end side of the rotation region, and the other of the rotation region. The outside air inlet 12 is fully opened while the inside air inlet 11 is fully closed by the closing portion 23 on the end side.

Further, the intake case 4 is formed with a turning portion 27 so as to correspond to the ventilation hole 25. The turning portion 27 is formed in the intake case 4 so as to face the ventilation member 22a of the switching door 20. Further, the turning portion 27 corresponds to the conical shape of the ventilation member 22a and is formed in a plane along the conical shape. For this reason, in this embodiment, it is an inclined surface inclined toward the casing 3. Thereby, the direction change part 27 guides air so that it may flow into the bell mouth 9 of the casing 3. Further, an air introduction space 28 into which air flows is provided between the inner surface of the turning portion 27 and the outer surface of the ventilation member 22a as shown in FIG. The air introduction space 28 communicates with the inside of the casing 3 through the bell mouth 9.

Thus, the direction change part 27 inclines and the air introduction space 28 is provided between the ventilation member 22a, so that the air that has passed through the ventilation holes 25 flows into the bell mouth 9 from the air introduction space 28. Is possible. Further, since the turning portion 27 is inclined, it is possible to avoid interference with the vehicle structure even if a vehicle structure such as the cross car beam C is disposed (see FIG. 3).
Next, the operation of this embodiment will be described with reference to FIGS.

  When the switching door 20 rotates in the intake case 4, one of the inside air introduction port 11 and the outside air introduction port 12 is blocked, and the other communicates with the inside of the intake case 4. The air is introduced into the intake case 4. The introduced air passes through the back side of the main closing portion 23a, is sucked into the casing 3 from the air intake 8 of the bell mouth 9, and is supplied into the unit case from the air outlet 7 by the fan 2 that is driven to rotate. Is done.

  At this time, a part of the air flowing along the main closing portion 23a reaches the ventilation member 22a and flows out into the air introduction space 28 from the ventilation hole 25 of the ventilation member 22a. The air that has flowed out flows to the bell mouth 9 side by the action of the deflecting portion 27, is sucked into the casing 3 from the air intake port 8 of the bell mouth 9, and is blown from the air outlet 7 by the driving force of the fan as described above. Supplied in the unit case.

  In such an embodiment, since the air sucked into the intake case 4 passes through the ventilation hole 25 formed in the ventilation member 22a of the switching door 20, and then is introduced into the casing 3 from the turning portion 27, the inside air And the outside air can be smoothly supplied into the casing 3, and a sufficient amount of air can be secured. Therefore, as shown in FIG. 3, even if the vehicle structure such as the cross car beam C is located in the vicinity of the blower, the inside air introduction port 11 and the outside air introduction port 12 of the intake case 4 are separated from the cross car beam C. Can be placed at different positions. As a result, the increase in air resistance due to the vehicle structure such as the cross car beam C is eliminated, air can be sucked in smoothly, and generation of large noise caused by the vehicle structure can be suppressed.

  The present invention is not limited to the above embodiment, and various modifications are possible. For example, the blower of the present invention may be used in an apparatus other than the vehicle air conditioner. Further, the ventilation member 22a which is the connecting portion 22 may have a shape other than the conical surface shape.

It is a disassembled perspective view which shows the air blower of one Embodiment of this invention. It is a disassembled perspective view of an intake case. It is sectional drawing which shows the internal structure of an air blower. It is a top view which shows the flow of the air in an air blower. It is sectional drawing of the conventional air blower described in patent document 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Blower 2 ... Fan 3 ... Casing 4 ... Intake case 8 ... Air intake 11 ... Inside air introduction port 12 ... Outside air introduction port 20 ... Switching door 21 ... Rotating shaft 22 ... Connection part 22a ... One side of connection part 23 ... Closure part 25 ... Ventilation hole 27 ... Turning direction

Claims (2)

An inside air introduction port (11) and an outside air introduction port (12) that are attached to the air intake port (8) of the casing (3) that accommodates the fan (2) that is rotationally driven and communicate with the air intake port (8), respectively. ) And a plate-like closing portion (23) are integrally formed with the rotating shaft (21) by connecting portions (22) provided at both ends of the closing portion (23), and While being rotatably disposed inside the intake case (4), the outside air introduction port (12) is fully closed by the closing portion (23) while the inside air introduction port (11) is fully opened on one end side of the rotation region. A blower provided with a switching door (20) that fully opens the outside air introduction port (12) while fully closing the inside air introduction port (11) by the closing part (23) on the other end side of the rotation region,
A ventilation hole (25) penetrating in at least one of the connecting portions (22) (22a) in the thickness direction;
A blower characterized in that a turning portion (27) for guiding air to an air intake (8) is formed in a portion of the intake case (4) facing the ventilation hole (25). The blower according to claim 1,
The connecting portion (22) has a conical shape that becomes wider from the rotating shaft (21) toward the closing portion (23),
The blower characterized in that the turning portion (27) has a flat surface along the conical slope.

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