JPWO2014199590A1 - Air conditioner - Google Patents

Abstract

In order to provide a high-performance air conditioner in which the blown air flow does not diffuse in the longitudinal direction of the blades (in the direction transverse to the wind flow) and the air flow rate does not decrease, the air blown out from the air outlet At least one end portion of the blade that controls the flow direction in the vertical direction is provided with a wind shielding member that prevents the air flowing along the rear guider from flowing in the longitudinal direction of the blade. As a result, even if the air flowing along the rear guider reaches the downstream part not covered by the side wall provided in the main body of the air conditioner, it is prevented from diffusing left and right by the wind shielding member, and the air volume is reduced. It is not necessary to improve the air blowing performance.

Description

  The present invention relates to an air conditioner, and more particularly to an indoor unit with improved air blowing performance.

  In general, an air conditioner used in a home usually has a large noise source such as a compressor and a vibration source arranged in the outdoor unit to suppress noise and vibration in the room, and has low noise and vibration. A separator type in which a fan, a heat exchanger, and the like are arranged in an indoor unit is used. The indoor unit configured as described above is installed on a wall surface of the room and performs an air conditioning operation so that the room has a desired temperature. The outdoor unit and the indoor unit are mechanically and electrically connected to each other by a refrigerant pipe and a control wiring, and perform an air conditioning operation in cooperation with each other.

  The indoor unit of the air conditioner is provided with a blowout port for blowing out temperature-controlled air into the room, and the blowout port is provided with a wind direction changing means for changing the direction of the blown air. ing. As the air direction changing means, in order to send out the air blown from the outlet toward a desired area in the room, the air flow changed from the outlet to the upper and lower air direction changing blades for changing the flow of the air in the vertical direction, and from the outlet There is used a wind direction changing blade composed of left and right wind direction changing blades that change the flow of the blown air in the left and right direction.

  For example, in order to increase the amount of air blown from the air outlet, the vertical air direction changing blade in the conventional air conditioner is arranged on the substantially extended extension of the rear guider that forms the lower part of the air outlet. (For example, refer patent document 1).

JP 09-287807 A

  However, in the above-described conventional configuration, when the air flowing out from the rear guider to the up / down airflow direction changing blades reaches the downstream side from the portion covered with the side walls provided on both side surfaces of the air conditioner body, both sides are not covered with the side walls. Pressure drops rapidly. And the air diffused in the longitudinal direction (lateral direction with respect to the flow of a wind) of the up-and-down wind direction change blade, and the subject that an air volume fell occurred.

  This invention solves the said conventional subject, and it aims at providing the air conditioner which prevents that the air blown from the blower outlet diffuses and a ventilation volume falls.

  In order to solve the above-described conventional problems, an air conditioner of the present invention includes a main body having an air intake port and an air outlet, a heat exchanger for exchanging heat from the air taken from the intake port, and heat exchange by the heat exchanger. A fan for blowing out the air from the outlet, a rear guider arranged downstream of the fan to guide the air flow to the outlet, and a blade for changing the direction of the air flowing along the rear guider up and down The blades are provided downstream of the rear guider so as to be rotatable continuously with the rear guider, and at least at one end in the longitudinal direction of the blades, the air shield that prevents the air flowing along the rear guider from flowing in the longitudinal direction of the blades The member is provided along the short direction of the blade.

  Thereby, a blade | wing can be utilized as extension of a rear guider and a ventilation performance can be improved. Further, even if the air flowing out from the rear guider to the blades reaches the downstream side of the portion covered with the side wall provided in the air conditioner body, the lateral diffusion is eliminated. As a result, the air volume does not decrease, and the air blowing performance can be further improved.

  The air conditioner according to the present invention includes a main body having an air intake port and an air outlet, a heat exchanger for exchanging heat from the air taken from the intake port, and air exchanged by the heat exchanger from the air outlet. A fan for blowing out, a rear guider disposed downstream of the fan to guide the air flow to the outlet, and a blade for changing the direction of the air flowing along the rear guider up and down. Provided downstream of the rear guider and rotatably, and at least one end in the longitudinal direction of the blade is provided with an abnormal noise prevention member along the short direction of the blade to prevent abnormal noise generated during blowing It is.

  Thereby, a blade | wing can be utilized as extension of a rear guider and a ventilation performance can be improved. Furthermore, an annoying abnormal sound that occurs near the outlet of the main body can also be prevented.

FIG. 1 is a longitudinal sectional view showing an air conditioner according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram illustrating a state during the air conditioning operation of the air conditioner according to the first embodiment. FIG. 3 is a schematic diagram illustrating an operation example of the up / down air direction changing blades during the air conditioning operation of the air conditioner according to the first embodiment. FIG. 4 is a schematic diagram illustrating another operation example of the up / down air direction changing blades during the air conditioning operation of the air conditioner according to the first embodiment. FIG. 5 is a schematic diagram illustrating still another operation example of the up / down air direction changing blades during the air conditioning operation of the air conditioner according to the first embodiment. FIG. 6 is a perspective view showing a lower blade of a vertical airflow direction changing blade of the air conditioner according to the first embodiment. FIG. 7 is a perspective view showing a lower blade of an up-and-down air direction changing blade of an air conditioner according to Embodiment 2 of the present invention. FIG. 8 is a perspective view showing the lower blade of the up / down air direction changing blade of the air conditioner according to Embodiment 3 of the present invention.

  The air conditioner according to the first aspect includes a main body having an air inlet and an outlet, a heat exchanger for exchanging heat from the air taken in from the inlet, and the air exchanged by the heat exchanger is blown out from the outlet. And a rear guider that is arranged downstream of the fan and guides the air flow to the outlet, and a blade that changes the direction of the air flowing along the rear guider up and down, and the blade is downstream of the rear guider. A wind-shielding member is provided that is continuous and rotatable with the rear guider, and at least one end in the longitudinal direction of the blades to prevent the air flowing along the rear guider from flowing in the longitudinal direction of the blades. .

  Thereby, a blade | wing can be utilized as extension of a rear guider and a ventilation performance can be improved. Furthermore, even if the air flowing out from the rear guider to the blades reaches the downstream side of the portion covered by the side wall of the air conditioner body, the blades are provided with a wind shielding member, so that they diffuse in the lateral direction (longitudinal direction of the blades). There is no airflow. As a result, it is possible to further improve the blowing performance.

  In the air conditioner of the second aspect, in particular, in the air conditioner of the first aspect, at one end in the longitudinal direction of the blades, the air conditioner is disposed adjacent to the inside of the wind shielding member, and is generated at the time of blowing. A noise prevention member for preventing noise is provided.

  Thereby, generation | occurrence | production of the noise which generate | occur | produces at the time of ventilation can be prevented, and comfort improves.

  In the air conditioner according to the third aspect, in particular, in the air conditioner according to the first aspect, the width of the wind shielding member decreases from the downstream side toward the upstream side at the upstream end portion.

  Thereby, since the shape of the upstream edge part of a wind-shielding member becomes a shape which reduces the pressure loss of a ventilation path, improvement of ventilation performance is attained.

  In the air conditioner of the fourth aspect, in particular, in the air conditioner of the first aspect, the wind shielding member is rotatable in the longitudinal direction of the blades.

  Thereby, the right-and-left direction can be divided and comfortable air conditioning can be performed.

  An air conditioner according to a fifth aspect includes a main body having an air intake port and an air outlet, a heat exchanger that exchanges heat with air taken from the intake port, and blows out air that has been heat-exchanged by the heat exchanger from the air outlet. And a rear guider disposed downstream of the fan to guide the air flow to the outlet, and a blade that changes the direction of the air flowing along the rear guider up and down, the blade being downstream of the rear guider A noise prevention member is provided along the short direction of the blade to prevent the noise generated at the time of blowing at at least one end in the longitudinal direction of the blade. Yes.

  Thereby, a blade | wing can be utilized as extension of a rear guider and a ventilation performance can be improved. Furthermore, it is possible to prevent abnormal noise that occurs during air blowing and to realize comfortable air conditioning.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment, The various air conditioner to which the structure based on the same technical idea was applied is included.

(Embodiment 1)
The air conditioner of Embodiment 1 is a so-called separate type air conditioner in which an indoor unit and an outdoor unit are connected to each other by a refrigerant pipe, a control wiring, and the like. The indoor unit and the outdoor unit constitute a heat pump, and the outdoor unit is provided with a compressor. The indoor unit in the air conditioner of Embodiment 1 is a wall-mounted indoor unit that is attached to a wall surface in the room.

  FIG. 1 is a longitudinal sectional view showing a schematic configuration of an indoor unit in an air conditioner according to Embodiment 1 of the present invention, and shows a state when an air conditioning operation is stopped.

  As shown in FIG. 1, the indoor unit 1 includes a main body 2 having a front opening 2a and an upper opening 2b that serve as an air intake, and an outlet 2c that blows out heat-exchanged air. A movable front panel 3 that opens and closes the opening 2a is provided. Inside the main body 2, a filter 4 for removing dust contained in room air, a heat exchanger 5 for exchanging heat of the taken room air, and the front opening 2 a and the upper surface opening 2 b are taken in through the filter 4. There is provided a fan 6 that is a cross-flow fan that exchanges heat in the indoor air with the heat exchanger 5 and generates an airflow for blowing out the air from the outlet 2c into the room. The ventilation path 10 extending from the downstream side of the fan 6 to the upstream side of the air outlet 2c is disposed on the downstream side of the fan 6 to guide the air flow, and the stabilizer disposed to face the rear guider 7. 11 and both side walls (not shown) of the main body 2. In addition, the term “stabilizer” described above may be referred to as a stabilizer only for a member that is located near the downstream of the fan 6 and that has a curved surface shape for stabilizing the vortex generated near the front of the fan 6. . In this embodiment, the wall portion that is located on the downstream side of this member and that forms the upper side of the ventilation path of the air conveyed by the fan 6 is also referred to as “stabilizer”.

  In the air outlet 2c for blowing out the air heat-exchanged in the air conditioner of the first embodiment, the air outlet 2c opens and closes the air outlet 2c and can change the air blowing direction up and down. The up-and-down wind direction change blade 8 is provided. Furthermore, left and right wind direction changing blades 9 which are left and right wind direction changing means capable of changing the air blowing direction to the left and right are provided inside the air outlet 2c.

  In the state when the air-conditioning operation is stopped as shown in FIG. 1, the front panel 3 is in close contact with the main body 2 to close the front opening 2a, and the up / down air direction changing blade 8 is housed in the outlet 2c to close the outlet 2c. doing.

  FIG. 2 is a schematic diagram illustrating a state during an air conditioning operation in the air conditioner of the first embodiment. As shown in FIG. 2, the front panel 3 moves by a predetermined distance in a direction away from the main body 2 to open the front opening 2a.

  The up-and-down air direction changing blade 8 includes a lower blade 8a that is an example of a first blade and an upper blade 8b that is an example of a second blade provided above the lower blade 8a. The upper and lower wind direction changing blades 8 control the blowing direction of the air blown out from the air outlet 2c in cooperation with the lower blade 8a and the upper blade 8b. The lower blade 8a is configured to rotate by a predetermined angle by the rotation operation of the lower blade drive shaft. The upper blade 8b is configured to rotate and move toward and away from the lower blade 8a while being held substantially parallel to the lower blade 8a by control, for example.

  Note that a guide mini blade 8c, which is an example of a third blade, is provided on the upper blade 8b of the vertical wind direction changing blade 8. The guide mini blade 8c has a function of generating an air flow that protects the main flow formed by the lower blade 8a and the upper blade 8b. Thus, by providing the guide mini blade 8c on the upper surface of the upper blade 8b, mixing of the surrounding air to the main flow is prevented, and the attenuation of the flow in the main flow is suppressed.

  In addition, the left-right wind direction change blade | wing 9 is comprised by the several blade, and is controlled so that the blowing direction of the air which blows off from the blower outlet 2c may be changed into the left-right direction.

  In the above configuration, when the air conditioner starts the air-conditioning operation, the front panel 3 is moved away from the main body 2 by a predetermined distance, the front opening 2a is opened, and the up-and-down wind direction changing blade 8 is opened and blown. The outlet 2c is opened. Thus, the fan 6 is driven in a state where the front opening 2a and the air outlet 2c are opened, and the room air is taken into the indoor unit 1 through the front opening 2a and the upper opening 2b. The taken-in room air passes through the filter 4, undergoes heat exchange in the heat exchanger 5, and is sucked into the fan 6. The air sucked into the fan 6 and subjected to heat exchange passes through the ventilation path 10 formed on the downstream side of the fan 6 and is blown out from the outlet 2c.

  When the air from the fan 6 passes through the ventilation path 10, the air from the fan 6 is guided by the rear guider 7 and the stabilizer 11 disposed on the downstream side of the fan 6, and blown out from the air outlet 2 c. Air from the fan 6, which is a cross-flow fan, flows along the curved surface of the rear guider 7 provided on the outer periphery of the fan 6 and is blown out from the air outlet 2 c.

  The blowing direction of the air blown out from the air outlet 2c is controlled by the up / down air direction changing blade 8 and the left / right air direction changing blade 9. Operations such as angle adjustment of the up / down air direction changing blade 8 and the left / right air direction changing blade 9 are controlled by a control device (not shown) that controls the air conditioner.

  3 to 5 show an example of the operation of the up / down air direction changing blade 8 during the air-conditioning operation in the air conditioner of Embodiment 1, and the rotation operation of the lower blade 8a and the upper blade 8b forming the main flow is shown. FIG.

  The upper and lower wind direction changing blades 8 rotate together with the lower blade 8a and the upper blade 8b by the rotation of the drive shaft that drives the lower blade 8a, and the upper blade 8b rotates while the lower blade 8a is fixed. It is the structure which can also be performed.

  The up-and-down air direction changing blade 8 in the air conditioner of Embodiment 1 is provided at the outlet 2c that is the downstream side end (downstream end) of the ventilation path 10, and the air blown from the outlet 2c is desired smoothly. Can be reached. In particular, the lower blade 8a is provided at the downstream end (downstream end) of the rear guider 7 and is in a position where the rear guider 7 is extended, and functions as a diffuser that exhibits a high rectifying effect on the air from the outlet 2c. Have.

  FIG. 3 shows an operation example in which the blowing surface 13 of the lower blade 8a is driven so as to be positioned linearly so as to be substantially continuous with the surface of the downstream end portion of the guide surface 14 of the rear guider 7. Yes. In the operation example shown in FIG. 3, the air from the blower outlet 2c is blown diagonally downward, and shows the state at the maximum air volume. At this time, the up-and-down wind direction changing blade 8 exhibits the function as a diffuser to the maximum. In addition, the blowing surface 13 of the lower blade | wing 8a is an upward surface in FIG. 3, and is a surface along which the main flow of the air which blows off from the blower outlet 2c flows.

  FIG. 4 is an operation example in which the blowout surface 13 of the lower blade 8a is driven so as to be positioned at an obtuse angle with respect to the surface of the downstream end portion of the guide surface 14 of the rear guider 7, and the blowout port 2c. The direction in which the air is blown out is substantially horizontal. FIG. 4 is an operation example during a general cooling operation.

  In FIG. 5, the blowing surface 13 of the lower blade 8 a faces downward in the vertical direction from the blowing direction of the guide surface 14 of the rear guider 7, that is, the direction of the extension line G extending along the guide surface 14. In addition, the blowing direction of air from the outlet 2c is a substantially downward direction. FIG. 5 is an operation example during normal heating operation.

  In the air conditioner of the first embodiment configured as described above, the air blown from the outlet 2c is diffused in the longitudinal direction of the lower blade 8a on the lower blade 8a of the vertical wind direction changing blade 8. The wind shield member 12 is provided so that the air blowing performance does not deteriorate.

  FIG. 6 is a perspective view showing a state in which the wind shielding member 12 (12a, 12b) is provided on the lower blade 8a of the vertical wind direction changing blade 8. FIG.

  The wind shield member 12 is provided in the direction in which air flows on both sides of the lower blade 8a. More specifically, the wind-shielding member 12 is formed at substantially both ends in the longitudinal direction of the lower blade 8a along the short direction of the lower blade 8a. The wind shield member 12 is formed from the lower blade 8a in a direction substantially orthogonal to the surface of the lower blade 8a. The height of the wind shield member 12 (the direction substantially orthogonal to the surface of the lower blade 8a) is larger than the maximum thickness of the lower blade 8a.

  The wind shield member 12 preferably has a width that decreases from the downstream side toward the upstream side at the upstream end. This prevents the windshield member 12 from becoming a large resistance when air flows.

  Since the wind shielding members 12 are provided on both sides of the lower blade 8a, air continuously flowing from the rear guider 7 to the blowing surface 13 of the lower blade 8a leaks to both sides in the longitudinal direction of the lower blade 8a at the maximum air volume. Since it flows in the downstream direction, the function as the diffuser of the up-and-down wind direction changing blade 8 is further strengthened. Thereby, ventilation performance improves and the input to the motor which drives the fan 6 required in order to implement | achieve the same air volume can be reduced, Therefore Energy saving is realizable. Furthermore, the reachability of air in the space is also improved. Therefore, comfortable air conditioning can be realized.

  The wind shielding member 12 may be rotatable in the longitudinal direction of the lower blade 8a. The left and right wind direction changing blades 9 rotate the wind shielding member 12 in the left and right directions in accordance with the change in the blowing direction of the air blown from the air outlet 2c to the left and right directions. It is possible to prevent the blowing from being hindered. Thereby, more comfortable air conditioning becomes possible.

  In addition, the height of the wind shielding member 12 is not necessarily a uniform height and a uniform width. The height and width of the wind-shielding member 12 may change from upstream to downstream in consideration of stowability when the operation is stopped or in consideration of further improving the blowing performance. Moreover, you may provide the wind-shielding member 12 only in either one instead of both right and left of the both ends of the lower blade | wing 8a.

(Embodiment 2)
FIG. 7 is a perspective view showing the lower blade 8a among the upper and lower wind direction changing blades 8 of the air conditioner according to the second embodiment of the present invention.

  The lower blade 8a of this embodiment is provided with an abnormal noise prevention member 15 that is disposed adjacent to the inside of the wind shield member 12 (12a, 12b) and prevents annoying abnormal noise that occurs during ventilation. It has been.

  As in the first embodiment, the air sucked into the fan 6 is guided to the ventilation path 10 formed on the downstream side of the fan 6 by the rear guider 7 and the stabilizer 11 arranged on the downstream side of the fan 6. And it blows off from the blower outlet 2c through the ventilation path 10 (refer FIG. 2).

  At this time, the air flow causes friction with a side wall (not shown) formed in the main body 2, so that the wind speed of the air in the vicinity of the side wall becomes smaller than other portions due to friction loss. When air is blown out from the air outlet and discharged into the open area, the pressure rapidly decreases. Therefore, air flow disturbances such as unstable air flow and reverse suction (reverse air flow) occur near the side wall where the wind speed is low. Due to the disturbance of the air flow, an annoying noise is generated, which causes discomfort to people in the space where the air conditioner is used.

  However, according to the configuration of the present embodiment, the noise prevention member 15 (15a, 15b) functions to suppress the backflow of air in the vicinity of the wind shielding member 12, so that reverse suction is prevented and air turbulence is eliminated. be able to. That is, a high rectifying effect can be exhibited with respect to the air from the air outlet, and an annoying abnormal sound can be suppressed.

  Although the noise prevention member 15 has a certain level of noise prevention effect even if it is arranged on the rear guider 7, it is more abnormal if the noise prevention member 15 is provided on the lower blade 8a which is the final end from which air is blown out. The prevention effect is great. Moreover, when the noise prevention member 15 is arrange | positioned on the rear guider 7, the noise prevention member 15 becomes a hindrance of an air flow, and there exists a concern about big deterioration of ventilation performance. On the other hand, when the noise preventing member 15 is provided on the lower blade 8a which is the final end from which the air is blown out, the deterioration of the blowing performance is minimized.

  When the wind shield member 12 is rotated in the longitudinal direction of the lower blade 8a, the noise preventing members 15a and 15b are also rotated together with the wind shield members 12a and 12b and are blown out from the outlet 2c. The air blowing direction can be prevented from being hindered when the air blowing direction is divided into the left and right directions.

  In addition, an annoying abnormal sound may be generated only on the left side toward the air outlet 2c, may be generated only on the right side, may be generated on both sides, or one may be louder than the other. For this reason, although the arrangement | positioning of the noise prevention member 15 has a case where both the right and left noise prevention members are required and the case where only one side is sufficient, these can be selected arbitrarily.

  The noise prevention member 15 will be described more specifically. The noise preventing member 15 is formed along the short direction of the lower blade 8 a adjacent to the inside of the wind shielding member 12. And the noise prevention member 15 is formed in the direction substantially orthogonal to the surface of the lower blade 8a from the lower blade 8a. In addition, the height of the noise preventing member 15 (the direction substantially orthogonal to the surface of the lower blade 8a) is smaller than the height of the wind shielding member 12. More preferably, the height of the noise preventing member 15 is smaller than the maximum thickness of the lower blade 8a. Moreover, it is preferable that the noise prevention member 15 increases in width from the upstream side toward the downstream side.

(Embodiment 3)
FIG. 8 is a perspective view showing the lower blade 8a among the upper and lower wind direction changing blades 8 in the air conditioner according to the third embodiment of the present invention.

  In this embodiment, the windshield member 12 (12a, 12b) is not provided on the lower blade 8a, but only the noise preventing member 15 (15a, 15b) for preventing annoying abnormal noise is provided.

  Even in the absence of the wind shielding member 12, it is possible to prevent reverse suction and air turbulence near the side wall of the main body 2. This is particularly useful when the lower blade 8a is disposed close to the air outlet 2c.

  In the state where there is no wind shield member 12, it is preferable that one side surface of the noise preventing member 15 be provided on the same plane as the side surface of the lower blade 8a.

  In addition, although the shape of the noise prevention member 15 was demonstrated as a quadrangular pyramid in FIG. 7, FIG. 8, it is not restricted to this shape. As an example of other shapes, the shape of the noise preventing member 15 may be a triangular pyramid or a quadrangular prism. The noise preventing member 15 is preferably widened from the upstream side toward the downstream side, but is not limited thereto. Any shape that can prevent reverse suction and air turbulence while preventing the noise prevention member 15 from causing pressure loss in the ventilation path as much as possible is acceptable. Further, the left and right noise preventing members do not have to have the same shape.

  As described above, in the air conditioner according to the present invention, the airflow is not diffused in the lateral direction, the air volume is not reduced, and the air blowing performance is improved. As a result, it is possible to blow out air from the air outlet so as to reach a desired area with high performance, and it is possible to perform comfortable air conditioning. Therefore, it is useful as an air conditioner used for business use and general homes. is there.

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Main body 2a Front opening part 2b Upper surface opening part 2c Outlet 3 Front panel 4 Filter 5 Heat exchanger 6 Fan 7 Rear guider 8 Up and down wind direction change blade 8a Lower blade 8b Upper blade 8c Guide mini blade 9 Left and right wind direction change blade 10 Ventilation path 11 Stabilizer 12 Wind shielding member 13 Blowing surface 14 Guide surface 15 Abnormal noise preventing member

Claims (5)

A body having an air intake and an air outlet;
A heat exchanger for exchanging heat from the air taken from the intake;
A fan for blowing out the air exchanged by the heat exchanger from the outlet;
A rear guider disposed downstream of the fan and guiding the flow of air to the outlet;
A blade that changes the direction of the air flowing along the rear guider up and down,
The blade is provided downstream of the rear guider and continuously with the rear guider so as to be rotatable.
At least one end in the longitudinal direction of the blade is provided with a wind shield member that prevents air flowing along the rear guider from flowing in the longitudinal direction of the blade along the short direction of the blade. Air conditioner. The noise prevention member for preventing the noise which generate | occur | produces at the one end of the longitudinal direction of the said blade | wing adjacent to the inner side of the said wind-shielding member and generate | occur | produces at the time of ventilation is provided. Air conditioner. The air conditioner according to claim 1, wherein the wind-shielding member has a width that decreases from the downstream side toward the upstream side at an upstream end portion. The air conditioner according to claim 1, wherein the wind shielding member is rotatable in a longitudinal direction of the blade. A body having an air intake and an air outlet;
A heat exchanger for exchanging heat from the air taken from the intake;
A fan for blowing out the air exchanged by the heat exchanger from the outlet;
A rear guider disposed downstream of the fan and guiding the flow of air to the outlet;
A blade that changes the direction of the air flowing along the rear guider up and down,
The blade is provided downstream of the rear guider and continuously with the rear guider so as to be rotatable.
An air conditioner in which at least one end in the longitudinal direction of the blade is provided with a noise preventing member for preventing noise generated during blowing along the short direction of the blade.

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