JP2010024873A - Blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blower having an increased air volume, reduced noises and a power saving function, wherein sucked air flows from the side of a suction port toward the suction port. <P>SOLUTION: The blower comprises a fan 11 to be rotated around a rotating shaft 111 for blowing air, a casing 12 storing the fan 11 and having the suction port 121 through which sucked air sucked into the fan 11 passes and a blown air passage 122 into which blown air blown from the fan 11 flows, and a passage forming member 14 arranged outside the casing 12 to form an sucked air passage 141 into which the sucked air flows. The sucked air passage 141 is formed extending in a direction perpendicular to the opening direction of the suction port 121 so that the sucked air flows from the side of the suction port 121 toward the suction port 121. In the sucked air passage 141, a guide member 15 is arranged at a downstream side portion 121b of the sucked air passage 141 in the suction port 121 for guiding the sucked air. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a blower configured such that a fan is accommodated in a casing, and intake air sucked into the fan flows from a side of the suction port of the casing toward the suction port.

  Conventionally, Patent Documents 1 and 2 describe a blower in which a fan is housed in a casing. In the prior art of Patent Document 1, the intake air sucked into the fan is configured to flow straight from the front side of the suction port of the casing toward the suction port. On the other hand, in the prior art of Patent Document 2, the intake air is configured to flow from the side of the intake port toward the intake port.

  In the prior art of Patent Document 1, a filter for purifying intake air is disposed outside the casing and on the front side of the intake port, and a plurality of ribs for supporting the filter are provided around the intake port of the casing.

Then, by setting the direction of the rib so that the air that has passed through the filter is guided to the suction port side by the rib, it is possible to prevent the rib from blocking the flow of the intake air and reducing the air volume.
JP 2006-175930 A JP-A-8-318727

  As shown in FIG. 7, in the prior art of Patent Document 2, since the intake air flows from the side of the intake port 121 toward the intake port 121, the upstream portion 121 a of the intake air in the intake port 121. (The portion surrounded by the broken line L1 in FIG. 7) increases the amount of intake air, and the downstream portion 121b of the intake air (the portion surrounded by the broken line L2 in FIG. 7) decreases the amount of intake air. There is a bias in the amount of intake air. For this reason, there is a problem that efficiency is not good in terms of air volume, noise, and power consumption.

  In order to solve this problem, the present inventor considered applying the rib of Patent Document 1 to the conventional technique of Patent Document 2. However, according to the detailed examination of the present inventor, since Patent Document 1 sets the direction of the rib on the assumption that the intake air flows straight from the front side of the suction port toward the suction port, Patent Document 1 It has been found that even if the rib 1 is applied to the prior art of Patent Document 2 as it is, the uneven intake air amount cannot be eliminated.

  The present invention has been made in view of the above points, and an object of the present invention is to increase air volume, reduce noise, and save power in a blower in which intake air flows from the side of an intake port.

In order to achieve the above object, in the invention described in claim 1, a fan (11) that rotates around a rotating shaft (111) and blows air,
A casing which houses the fan (11) and forms a suction port (121) through which suction air sucked into the fan (11) passes and a blown air passage (122) through which blown air blown out from the fan (11) flows. (12)
A passage forming member (14) disposed outside the casing (12) and forming an intake air passage (141) through which intake air flows,
The intake air passageway (141) extends in a direction perpendicular to the opening direction of the intake port (121) and is formed so that the intake air flows from the side of the intake port (121) toward the intake port (121). ,
The intake air passage (141) is provided with a wind guide member (15) for guiding the intake air to a downstream portion (121b) of the intake air passage (141) in the intake port (121). .

  According to this, since the air guide member (15) guides the intake air to the downstream portion (121b) of the intake air passage (141) in the intake port (121), it is easy to suck the intake air in the intake port (121). The amount of intake air from the upstream portion (121a) of the intake air passage (141) is suppressed, and the intake air is turned to the downstream portion (121b) of the intake air passage (141) in the intake port (121) accordingly. be able to.

  For this reason, since the intake air flowing from the side of the suction port (121) can be efficiently sucked from the entire circumference of the suction port (121), the suction efficiency can be improved. As a result, it is possible to increase the air volume, reduce noise, and reduce power consumption.

  The invention according to claim 2 is characterized in that, in the blower according to claim 1, a plurality of the air guide members (15) are arranged so as to surround the outer peripheral side of the suction port (121).

  Thus, the intake air flowing from the side of the suction port (121) can be sucked more efficiently from the entire circumference of the suction port (121), so that the suction efficiency can be further improved. As a result, it is possible to increase the air volume, reduce noise, and further reduce power consumption.

  According to a third aspect of the present invention, in the blower according to the first or second aspect, the air guide member (15) is disposed only on the upstream side of the intake air passage (141) with respect to the intake port (121). It is characterized by. Thereby, a structure can be simplified and cost can be reduced.

  According to a fourth aspect of the present invention, in the blower according to any one of the first to third aspects, the air guide member (15) is formed in a plate shape parallel to the opening direction of the suction port (121). It is characterized by being. Thereby, the structure of an air guide member (15) can be simplified and cost can be reduced.

In the invention according to claim 5, in the blower according to claim 4, the opening direction of the suction port (121) is parallel to the rotation axis (111),
The wind guide member (15) has an end on the side away from the suction port (121) facing the upstream side of the suction air passage (141), and an end on the side close to the suction port (121) is the rotation of the fan (11). It is formed in the shape of a curved plate that faces the direction.

  According to this, pre-turning can be given to intake air, when intake air flows along a curved-plate-like rib (15). Then, by giving a pre-swirl to the intake air, the intake air flows in a direction that does not oppose the rotation direction of the fan (11).

  For this reason, since the intake air can be smoothly sucked from the suction port (121), the suction efficiency can be further improved, and the air volume can be further increased, the noise can be reduced, and the power consumption can be reduced. it can.

  According to a sixth aspect of the present invention, in the blower according to any one of the first to fifth aspects, the intake air passage (141) swells along the flow of the intake air guided by the air guide member (15). Further, the intake air passage (141) is such that a part of the surface on the casing (12) side is lower than the surface on the intake air passage (141) side in the casing (12). It has a shape.

  Accordingly, since the intake air can be smoothly turned to the downstream portion (121b) of the intake air passage (141) in the intake port (121), the suction efficiency can be further improved, and the air volume can be further increased. Increase, noise and power consumption can be reduced.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
A first embodiment of the present invention will be described. FIG. 1 is a longitudinal sectional view showing a blower 10 in the present embodiment, and FIG. 2 is a transverse sectional view of the blower 10. The blower 10 according to the present embodiment is an application of the blower according to the present invention to a vehicle air conditioner, and is disposed at a portion on the passenger seat side below the instrument panel at the front of the vehicle interior. In addition, the arrow of the up-down direction of FIG. 1 has shown the up-down direction at the time of vehicle mounting.

  The blower 10 blows air (indoor air) and outside air (outdoor air) switched and introduced from an inside / outside air switching device (not shown) toward an air conditioning unit (not shown). In the air conditioning unit, the air blown from the blower is heat-exchanged by a heat exchanger to become air-conditioned air having a desired temperature and is blown out toward the vehicle interior.

  The blower 10 is a centrifugal multiblade blower, and is a resin fan that rotates around a rotating shaft 111 and sucks air from one axial end (upper side in FIG. 1) and blows it radially outward. 11 and a resin scroll casing 12 that houses the fan 11.

  The scroll casing 12 forms a suction port 121 through which suction air sucked into the fan 11 passes, and a blown air passage 122 through which blown air blown out from the fan 11 flows.

  In addition, the blower 10 is disposed outside the electric motor 13 that drives the fan 11 and the scroll casing 12, and forms an intake air passage 141 that guides the inside air and the outside air from the inside / outside air switching device to the inlet 121 as intake air. And a resin-made passage forming member 14.

  The fan 11 has a rotating shaft 111 arranged in parallel with the vertical direction. The inlet 121 of the scroll casing 12 opens in the vertical direction. That is, the opening direction of the suction port 121 is parallel to the rotation shaft 111 of the fan 11.

  In this example, the suction port 121 is disposed so as to open upward on the upper side of the fan 11. In this example, the suction port 121 is formed in a bell mouth shape, and the opening is circular. In FIG. 2, the illustration of the bell mouth shape of the suction port 121 is omitted for convenience of illustration, and the suction port 121 is illustrated as a simple circular hole.

  The blowing air passage 122 of the scroll casing 12 is formed in a spiral shape, and the blowing air from the fan 11 is collected and rectified. The electric motor 13 is disposed on the side opposite to the suction port 121, that is, on the lower side of the fan 11.

  In this example, the passage forming member 14 is disposed above the scroll casing 12. The passage forming member 14 may be constituted by a part of a case (not shown) that forms an air passage of the inside / outside air switching device, or the passage forming member 14 is formed integrally with the scroll casing 12. May be.

  The intake air passage 141 formed in the passage forming member 14 extends in a direction perpendicular to the direction of the rotation shaft 111 (the left-right direction in FIGS. 1 and 2). In this embodiment, since the side walls on both sides in the width direction (the vertical direction in FIG. 2) of the passage forming member 14 are formed in parallel planes, the width of the intake air passage 141 is constant.

  The intake air introduced from the inside / outside air switching device flows through the intake air passage 141 in the passage forming member 14 in a direction perpendicular to the direction of the rotation shaft 111 and then flows into the fan 11 through the suction port 121. It has become. Accordingly, as indicated by an arrow A1 in FIGS. 1 and 2, the intake air flows from the side of the suction port 121 toward the suction port 121 and is sucked into the suction port 121.

  A plurality of plate-like ribs 15 are disposed in the intake air passage 141 in a state standing in the opening direction of the suction port 121 (the direction of the rotation shaft 111). The rib 15 serves as an air guide member that guides the intake air so that the intake air sucked into the suction port 121 is turned to the downstream portion 121b of the suction air in the suction port 121. In this example, ten ribs 15 are formed in a rectangular flat plate shape and arranged in parallel with the opening direction of the suction port 121 (the direction of the rotation axis 111).

  Further, in this example, the rib 15 is protruded upward from the lower wall surface of the passage forming member 14, and a gap is provided between the upper end of the rib 15 and the upper wall surface of the passage forming member 14. However, the gap is provided. Alternatively, the upper end of the rib 15 may be brought into contact with the upper wall surface of the passage forming member 14. Further, the rib 15 may protrude downward from the upper wall surface of the passage forming member 14, and a gap may be provided between the upper end of the rib 15 and the lower wall surface of the passage forming member 14.

  The rib 15 can be formed of, for example, a resin. Further, the rib 15 may be formed integrally with the passage forming member 14, or may be formed separately from the passage forming member 14 and fixed to the passage forming member 14 by an appropriate fixing means.

  As shown in FIG. 2, the plurality of ribs 15 are arranged in a distributed manner so as to surround the outer peripheral side of the suction port 121. The plurality of ribs 15 are arranged so as to be dense on the upstream side of the intake air passage 141 and sparse on the downstream side of the intake air passage 141.

  Further, the plurality of ribs 15 are arranged at a predetermined angle with respect to the intake air passage 141. More specifically, of the plurality of ribs 15, the rib 15 located on the upstream side (the left side in FIG. 2) of the intake air passage 141 is located on the intake air passage 141 toward the downstream side of the intake air passage 141. It is arranged at an angle that faces the outside in the width direction.

  On the other hand, of the plurality of ribs 15, the rib 15 located on the downstream side (right side in FIG. 2) of the intake air passage 141 is the width direction of the intake air passage 141 toward the downstream side of the intake air passage 141. It is arranged at an angle that faces the inside.

  FIG. 3 shows the flow of intake air at the inlet 121 in the configuration of FIG. In FIG. 3, some symbols are omitted for the sake of illustration. The intake air flowing through the intake air passage 141 passes between the plurality of ribs 15 and is guided to the intake port 121.

  At this time, since the plurality of ribs 15 are arranged at the above-mentioned angle with respect to the intake air passage 141, the upstream portion 121a of the intake air passage 141 in the intake port 121 (indicated by the broken line L1 in FIG. 3). The amount of intake air from the portion of the intake port 121 is suppressed, and the intake air is rotated to the downstream portion 121b of the intake port 121 (the portion surrounded by the broken line L2 in FIG. 3). It becomes.

  In other words, it is possible to suppress the amount of intake air from the portion 121a in the intake port 121 where it is easy to suck in the intake air, and to turn the intake air to the portion 121b in the intake port 121 where it is difficult to suck in the intake air.

  For this reason, since the intake air flowing from the side of the suction port 121 can be efficiently sucked from the entire circumference of the suction port 121, the suction efficiency can be improved. As a result, it is possible to increase the air volume, reduce noise, and reduce power consumption.

  In addition, by arranging the rib 15 located on the downstream side of the intake air passage 141 among the plurality of ribs 15 at the above-described angle, the rib 15 is effectively guided to the downstream portion 121b of the intake air passage 141 in the intake port 121. Can do. For this reason, since the suction efficiency can be improved effectively, it is possible to effectively increase the air volume, reduce noise, and reduce power consumption.

(Second Embodiment)
In the first embodiment, ten ribs 15 are arranged so as to surround the outer peripheral side of the suction port 121. However, in the second embodiment, two ribs 15 are sucked as shown in FIG. It is arranged only on the upstream side of the intake air passage 141 from the port 121.

  As a result, similarly to the first embodiment, the amount of intake air from the upstream side portion of the intake air passage 141 where intake air is easy to be sucked in the suction port 121 is suppressed, and the suction air is sucked into the suction port 121 accordingly. Since the intake air can be sent to the difficult downstream portion of the intake air passage 141, it is possible to increase the air volume, reduce the noise, and reduce the power consumption.

(Third embodiment)
In the first embodiment, the rib 15 is formed in a flat plate shape, but the rib 15 may be formed in a curved plate shape as in the third embodiment shown in FIG.

  More specifically, the end of the rib 15 on the side away from the suction port 121 faces the upstream side of the suction air passage 141, and the end near the suction port 121 faces the rotation direction R of the fan 31. It is formed in a curved plate shape.

  In the example of FIG. 5, eight ribs 15 are arranged. Of the eight ribs 15, two ribs 15 positioned on the most upstream side of the intake air passage 141 are formed in a flat plate shape, and the rest Six pieces are formed in the above-mentioned curved plate shape.

  According to this, the intake air flows along the curved plate-like ribs 15, whereby the intake air can be given a pre-turn. Then, by giving a pre-turn to the intake air, the intake air flows in a direction that does not oppose the rotation direction R of the fan 11.

  For this reason, since the intake air can be smoothly sucked from the suction port 121, the suction efficiency can be further improved, and the air volume can be further increased, the noise can be reduced, and the power consumption can be reduced.

(Fourth embodiment)
In the first embodiment, the side walls on both sides in the width direction (vertical direction in FIG. 2) of the passage forming member 14 are formed in a plane parallel to each other, and the width direction dimension of the intake air passage 141 is made constant. In the fourth embodiment, as shown in FIG. 6, the side wall is formed into a curved shape that swells outward in the width direction of the intake air passage 141, and the width direction dimension of the intake air passage 141 follows the flow of the intake air. It is changed as follows.

  Further, a part of the bottom wall surface of the passage forming member 14 is formed in a shape recessed to a position lower than the upper surface of the scroll casing 12, and a part of the bottom surface (the surface on the scroll casing 12 side) of the intake air passage 141 is scrolled. The position is lower than the upper surface of the casing 12 (the surface on the intake air passage 141 side).

  Thereby, since the intake air can be smoothly turned to the downstream portion of the intake air passage 141 where the intake air is difficult to be sucked in the suction port 121, the suction efficiency can be further improved, and the air volume can be further increased. Noise and power consumption can be reduced.

(Other embodiments)
In each said embodiment, although the wind guide member in this invention is comprised by the plate-shaped rib 15, it is not limited to this, A wind guide member is comprised by the member which has various shapes other than plate shape. be able to.

  Moreover, each said embodiment is only what illustrated the example of application of this invention, and this invention is not limited to this. For example, in each of the above embodiments, the present invention is applied to a vehicle air conditioner, but can be applied to various air conditioners such as a stationary air conditioner.

  For example, in each of the above embodiments, the present invention is applied to a centrifugal multiblade fan. However, if the air blower is configured so that intake air flows from the side of the intake port toward the intake port, It can be applied to various blowers such as an axial blower and a once-through blower.

It is a longitudinal cross-sectional view which shows the air blower in 1st Embodiment of this invention. It is a cross-sectional view of the blower of FIG. It is sectional drawing which shows the flow of the intake air in FIG. It is sectional drawing which shows the air blower in 2nd Embodiment of this invention. It is sectional drawing which shows the air blower in 3rd Embodiment of this invention. (A) is a cross-sectional view of the blower in 4th Embodiment, (b) is a longitudinal cross-sectional view of the blower of (a). It is sectional drawing which shows the air blower in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Fan 111 Rotating shaft 12 Casing 121 Intake port 121a The upstream part of the intake air passage 121b Out of the intake port 121b The downstream part of the intake air passage in the intake port 14 The passage formation member 141 The intake air passage 15 The air guide member

Claims (6)

A fan (11) that rotates about a rotation shaft (111) and blows air;
The fan (11) is housed, and an inlet (121) through which intake air sucked into the fan (11) passes, and a blown air passage (122) through which blown air blown out from the fan (11) flows. A casing (12) to be formed;
A passage forming member (14) disposed outside the casing (12) and forming an intake air passage (141) through which the intake air flows.
The intake air passage (141) extends in a direction perpendicular to the opening direction of the intake port (121), and the intake air is directed from the side of the intake port (121) toward the intake port (121). Formed to flow,
In the intake air passage (141), an air guide member (15) for guiding the intake air to the downstream portion (121b) of the intake air passage (141) in the intake port (121) is disposed. Blower characterized by.   The blower according to claim 1, wherein a plurality of the air guide members (15) are arranged so as to surround an outer peripheral side of the suction port (121).   The blower according to claim 1 or 2, wherein the air guide member (15) is disposed only upstream of the intake air passage (141) with respect to the intake port (121).   The blower according to any one of claims 1 to 3, wherein the air guide member (15) is formed in a plate shape parallel to an opening direction of the suction port (121). The opening direction of the suction port (121) is parallel to the rotation axis (111),
The air guide member (15) has an end on the side away from the inlet (121) facing the upstream side of the intake air passage (141), and an end on the side close to the inlet (121). The blower according to claim 4, wherein the blower is formed in a curved plate shape that faces the rotation direction of (11). The intake air passage (141) has a shape swelled along the flow of the intake air guided by the air guide member (15),
Further, the intake air passage (141) has a shape such that a part of the surface on the casing (12) side is at a position lower than the surface on the intake air passage (141) side in the casing (12). It has, The air blower as described in any one of Claim 1 thru | or 5 characterized by the above-mentioned.

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