JP2015124624A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blower which is quiet and hardly scatters dust, and which can increase an air amount.SOLUTION: A first blower part 3 which accommodates a first traverse flow fan 9 in a first fan casing 8 having a fist suction port 11 and a first blowout port 12, and a second blower part 4 which accommodates a second traverse flow fan 19 in a second fan casing 18 having a second suction port 21 and a second blowout port 22 are provided with a predetermined gap G. The first blowout port 12 and the second blowout port 22 are opened to the front face side, and a first flow guide surface 13 and a second flow guide surface 23 are provided in front of them respectively. Thus, a main air flow Vm generated by the traverse flow fans 9, 19 flows to the front along both flow guide surfaces 13, 23 by the Coanda effect, and a following air flow Vs generates between both blower parts 3, 4 and outside of both blower parts 3, 4, so that more air than the main air flow Vm can be blown, noise is suppressed low, and dust on an installation surface such as a floor is hardly scattered.

Description

  The present invention relates to a blower such as a fan.

  Conventionally, this type of blower has a base that houses a motor (electric motor) and a mixed flow impeller attached to the motor, and an annular nozzle that is provided with an outlet and a Coanda surface. By ejecting the primary air flow generated by the rotation from the outlet, the primary air flow flows along the Coanda surface, and the secondary air flow is generated along with the primary air flow, thereby increasing the air volume. (See, for example, Patent Document 1). Such a blower is safe because the rotating mixed flow impeller is not exposed.

Japanese Patent No. 5030106

  However, such a blower has the following drawbacks. First, since the mixed flow impeller needs to be accommodated in the base, the diameter of the mixed flow impeller cannot be increased. For this reason, in order to obtain a required air volume, the mixed flow impeller must be rotated at a high speed. Therefore, there has been a problem that noise is increased when the mixed flow impeller is rotated. Next, the air flow generated by the rotation of the mixed flow impeller is sucked from the base and discharged from the outlet of the nozzle. The base portion is placed on a floor or the like. Therefore, there is a problem that dust near the floor is sucked into the base and scattered from the outlet of the nozzle. This problem can be solved by providing a filter at the air inlet of the base. However, if the filter is clogged with dust, not only will the air flow decrease, but an excessive load will be applied to the motor. Another problem arises.

  An object of the present invention is to solve the above-mentioned problems, and to provide a blower that is quiet and difficult to disperse dust and that can increase the air volume.

  According to a first aspect of the present invention, there is provided a blower comprising: a first blower configured to accommodate a first cross-flow fan in a first fan casing having a first suction port and a first blowout port; A second air blower configured to accommodate a second cross-flow fan in a second fan casing having a mouth and a second air outlet, and the first air blower and the second air blower are spaced apart from each other. And the first air outlet and the second air outlet are both open to the front side, and the first airflow surface and the downstream side of the first air outlet and the second air outlet, respectively. A second flow guide surface is provided.

  A blower according to a second aspect of the present invention is the blower according to the first aspect, wherein the first blower and the second blower have a substantially plane-symmetric structure.

  The blower according to claim 3 of the present invention is the blower according to claim 2, wherein the first suction port and the second suction port are provided outward with respect to the symmetry plane.

  Further, according to a fourth aspect of the present invention, the blower according to the second aspect of the present invention is provided with a first guide surface substantially parallel to the symmetric surface in the vicinity of the antisymmetric surface side of the first flow guide surface. A second guide surface that is substantially parallel to the symmetry surface is provided in the vicinity of the antisymmetric surface side of the second flow guide surface.

  By configuring the blower according to claim 1 of the present invention as described above, after the main airflow generated by the both cross-flow fans is discharged forward from the both outlets, the two airflows are caused by the Coanda effect. While flowing as a laminar jet along the surface, a secondary airflow is generated between the air blowing portions and outside the air blowing portions along with the main airflow. For this reason, compared with the main airflow which both cross flow fans generate | occur | produce, the wind of much flow volume can be sent. Moreover, noise can be kept low by using a relatively quiet cross-flow fan. Furthermore, since the outside air is sucked from both the suction ports at a relatively high position in the room, it is possible to make it difficult to disperse dust on the floor surface.

  In addition, by making the said 1st ventilation part and the 2nd ventilation part into a substantially plane-symmetric structure, it can make it difficult to produce a bias | deviation in generation | occurrence | production of a substream between both ventilation parts.

  Further, by providing the first suction port and the second suction port outward with respect to the symmetry plane, the outside air between the two air blowing portions can be hardly sucked from both the suction ports. By sending air forward as a substream, the flow rate can be further increased.

  Further, a first guide surface that is substantially parallel to the symmetry surface is provided in proximity to the antisymmetric surface side of the first flow guide surface, and a symmetry surface is provided in proximity to the antisymmetric surface side of the second flow guide surface. By providing a second guide surface that is substantially parallel to the air flow, it is possible not only to smoothly merge the follower airflow generated on the outside of the air blowing sections with the main airflow discharged along both the airflow guide surfaces. Turbulence of the main airflow at the end of the flow guide surface can be suppressed.

It is a perspective view of the air blower which shows 1st embodiment of this invention. FIG. FIG. It is an AA expanded sectional view same as the above. It is explanatory drawing which shows the drive structure of the 1st and 2nd crossflow fan. It is a perspective view which shows a main airflow and a substream. It is explanatory drawing which shows the drive structure of the 1st and 2nd crossflow fan in the air blower which shows 2nd embodiment of this invention. It is a perspective view of the air blower which shows 3rd embodiment of this invention. FIG. It is a BB expanded sectional view similarly. It is explanatory drawing which shows the drive structure of the 1st and 2nd crossflow fan. It is a perspective view which shows a main airflow and a substream. It is a front view of the air blower which shows 4th embodiment of this invention. It is CC sectional drawing similarly.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 is a blower of the present invention. The blower 1 includes a base 2, a first blower 3, a second blower 4, and a head 5. The first blower 3 and the second blower 4 are each configured to be vertically long, and are provided side by side with a gap G in front view. And between the said 1st ventilation part 3 and the 2nd ventilation part 4, the distribution | circulation space P penetrated to the front and back is formed. Further, the first blower 3 and the second blower 4 are substantially plane-symmetric with respect to the symmetry plane S.

  The base 2 is configured to be installed on an installation surface such as a floor F. A first motor 6 and a second motor 7 are accommodated in the base 2.

The first blower 3 is provided on the upper left side of the base 2. The first air blowing unit 3 includes a vertically long first fan casing 8 and a first cross-flow fan 9. The first fan casing 8 has a fan housing chamber 10 inside, and a vertically long first suction port 11 and a vertically long first air outlet 12. The first suction port 11 is provided in the rear part of the first fan casing 8 so as to be biased toward the antisymmetric surface S side. On the other hand, the first air outlet 12 opens toward the front slightly behind the position where the gap G between the first air blowing part 3 and the second air blowing part 4 is the narrowest. A first flow guide surface 13 is formed on the downstream side (that is, the front side) of the first air outlet 12. Further, the first air outlet 12 is formed with a first directing portion 14 for guiding the airflow to the first flow guide surface 13. The first flow guide surface 13 is provided on the antisymmetric surface S side of the first air outlet 12. In addition, the first flow guide surface 13 has a convex shape on the upstream side and a downstream side on the downstream side so that the distance from a later-described second flow guide surface 23 increases toward the front, and the main air flow Vm flows almost directly in front. It is formed in a smooth curved surface that is concave. Further, a first guide surface 15 is formed close to the anti-symmetric surface S of the first flow guide surface 13. The first guide surface 15 is formed substantially parallel to the symmetry plane S. The first transverse fan 9 is accommodated in the fan accommodating chamber 10. The first cross-flow fan 9, a plurality of fins are arranged in annular, being formed as a whole an elongated cylindrical, with the rotation axis X ₁ is provided so as to be perpendicular, the first electric motor in said base portion 2 6 is connected. The first suction port 11 is provided with a louver 16 for preventing a user's finger or the like from touching the first cross flow fan 9. Also, the first conductive flow surface 13, as well is provided on the rotating shaft X ₁ side of the first air outlet 12, the first ShirubeMuko portion 14 is provided on the distal side of the first air outlet 12.

The second air blowing part 4 is provided on the upper right side of the base part 2. The second air blowing unit 4 includes a vertically long second fan casing 18 and a second transverse flow fan 19. The second fan casing 18 has a fan accommodating chamber 20 inside, and has a vertically long second suction port 21 and a vertically long second air outlet 22. The second suction port 21 is provided in the rear part of the second fan casing 18 so as to be biased toward the antisymmetric surface S side. On the other hand, the second air outlet 22 opens toward the front slightly behind the position where the gap G between the first air blower 3 and the second air blower 4 is the narrowest. A second flow guide surface 23 is formed on the downstream side (that is, the front side) of the second air outlet 22. The second air outlet 22 is formed with a second directing portion 24 for guiding the air flow to the second air guide surface 23. The second flow guide surface 23 is provided on the antisymmetric surface S side of the second air outlet 22. In addition, the second flow guide surface 23 has a convex shape on the upstream side and a concave shape on the downstream side so that the main air flow Vm flows almost directly in front at the tip while the distance from the first flow guide surface 13 increases toward the front. A smooth curved surface is formed. Furthermore, a second guide surface 25 is formed close to the anti-symmetric surface S side of the second flow guide surface 23. The second guide surface 25 is formed substantially parallel to the symmetry plane S. The second transverse fan 19 is accommodated in the fan accommodating chamber 20. The second cross flow fan 19, a plurality of fins are arranged in annular, being formed as a whole an elongated cylindrical, with the rotation axis X ₂ is provided so as to be perpendicular, the second electric motor within said base 2 7 is connected. The second suction port 21 is provided with a louver 26 for preventing a user's finger or the like from touching the second cross flow fan 19. Further, the second conductive flow surface 23, with provided on the rotary shaft X ₂ side of the second air outlet 22, the second ShirubeMuko portion 24 is provided on the distal side of the second air outlet 22.

  As described above, the first blower 3 and the second blower 4 are substantially plane-symmetric with respect to the symmetry plane S. Accordingly, the shape of the first fan casing 8 and the shape of the second fan casing 18 are opposite to each other. Specifically, the first fan casing 8 is formed such that the first suction port 11 is biased to the left side which is the antisymmetric surface S side. On the other hand, the second fan casing 18 is formed such that the second suction port 21 is biased to the right side which is the antisymmetric surface S side. Further, the first fan casing 8 has the first air outlet 12 formed on the right side which is the symmetry plane S side. On the other hand, the second fan casing 18 has the second air outlet 22 formed on the left side which is the symmetry plane S side. The first fan casing 8 is formed such that the first flow guide surface 13 is curved from the right side on the symmetrical plane S side of the first outlet 12 toward the left side on the antisymmetric plane S side. Is done. On the other hand, in the second fan casing 18, the second flow guide surface 23 is curved from the right side that is the symmetrical plane S side of the second outlet 22 toward the right side that is the antisymmetric plane S side. Formed. Further, the first fan casing 8 is formed such that the first guide surface 15 is close to the left side which is the antisymmetric surface S side of the first flow guide surface 13. On the other hand, the second fan casing 18 is formed such that the second guide surface 25 is close to the right side which is the antisymmetric surface S side of the second flow guide surface 23. The first cross flow fan 9 and the second cross flow fan 19 are also substantially plane symmetric with respect to the symmetry plane S (the positions of the first cross flow fan 9 and the second cross flow fan 19 are the same). The phase difference is not taken into account.) That is, the first cross flow fan 9 and the second cross flow fan 19 have the fins formed in opposite directions, and the rotation direction of the first cross flow fan 9 is clockwise in plan view. The direction of rotation of the cross flow fan 19 is counterclockwise in plan view. Note that it is preferable that both the suction ports 11 and 21 are opened so as to face obliquely rearward outward as in the present embodiment. If the outside air is sucked into the suction ports 11 and 21 from the obliquely rearward outside as the main airflow Vm, the flow space P defined between the blower portions 3 and 4 from the wide range behind the blower 1 is obtained. This is because more air can be sucked as the inner substream Vsi.

  The head 5 is provided so as to connect the upper end of the first blower 3 and the upper end of the second blower 4. An operation unit 28 is provided on the head 5.

Next, the operation of this embodiment will be described. When the user operates the operation unit 28 to start the operation of the blower 1, both the electric motors 6 and 7 are activated. When these electric motors 6 and 7 operate, the cross flow fans 9 and 19 of the air blowing sections 3 and 4 rotate about the rotation axes X ₁ and X ₂ . As described above, the first cross-flow fan 9 rotates clockwise in a plan view. In contrast, the second cross-flow fan 19 rotates counterclockwise in plan view. The rotational speed of the first crossflow fan 9 is the same as the rotational speed of the second crossflow fan 19. As the first cross-flow fan 9 rotates, outside air is sucked from the first suction port 11 and blown out from the first blower port 12 vigorously. As shown in FIG. 4, the airflow blown out from the first air outlet 12 once flows slightly inward along the first flow guide surface 13 in the circulation space P by the Coanda effect, and then smoothly. The direction is changed to flow outward along the first flow guide surface 13, and further to the front of the first flow guide surface 13. In addition, since the airflow blown out from the first air outlet 12 is directed to the first air guide surface 13 by the first guide portion 14, it can be surely along the first air guide surface 13. Similarly, when the second cross-flow fan 19 rotates, outside air is sucked from the second suction port 21 and blown out from the second blow-out port 22 vigorously. As shown in FIG. 4, the air flow blown out from the second air outlet 22 once flows inward slightly along the second flow guide surface 23 in the circulation space P by the Coanda effect, and then smoothly. The direction is changed, the air flows outward along the second flow guide surface 23, and further flows almost directly in the vicinity of the tip of the first flow guide surface 23. In addition, since the airflow blown out from the second air outlet 22 is also directed to the second air guide surface 23 by the second guide portion 24, it can be surely along the second air guide surface 23. Thus, both the said ventilation parts 3 and 4 generate the main airflow Vm, respectively.

  Note that, as described above, since both the suction ports 11 and 21 are formed vertically long, outside air is sucked from a wide range in the vertical direction. For this reason, a large amount of dust on the installation surface such as the floor F is not sucked and scattered. Further, since the source of the main airflow Vm is the cross-flow fans 9 and 19 with relatively low operating noise, noise can be suppressed low. Further, as described above, both the inlets 11 and 21 are provided to be deviated toward the antisymmetric surface S side (that is, the outer side), so that the cross flow fans 9 and 19 are rearward with respect to the symmetrical surface S, respectively. Aspirate outside air from the outside.

  Then, the air blowers 3 and 4 generate the main airflow Vm, respectively, so that the substream Vs is generated along with the main airflow Vm. The secondary airflow Vs includes an internal secondary airflow Vsi that flows through the circulation space P and an external secondary airflow Vso that flows on the antisymmetric surface S side (ie, the outside) of the air blowing units 3 and 4. As described above, the cross flow fans 9 and 19 suck the outside air from the diagonally rear side with respect to the symmetry plane S, so that the outside air behind the circulation space P is passed through the suction ports 11 and 21. Without being sucked, it can pass through the circulation space P as the inner substream Vsi. Further, the main air flow Vm flows along the both flow guide surfaces 13 and 23, so that the inner substream Vsi is generated so as to be dragged by the main air flow Vm along the both flow guide surfaces 13 and 23. At the same time, the main airflow Vm flows along both the flow guide surfaces 13 and 23, thereby creating a low pressure region in the circulation space P. The outside air enters the circulation space P from the upstream side (that is, the rear side) of the circulation space P. Flows in. As described above, the main air flow Vm flows along the both flow guide surfaces 13 and 23, so that a larger air volume can be generated as compared with the case where the main air flow Vm is merely blown out from the air outlets 12 and 22. Further, as described above, the first guide surface 15 and the second guide surface 25 are provided close to the anti-symmetric surface S side (that is, the outer side) of the both flow guide surfaces 13 and 23, respectively. Since the outer follower air flow Vso generated outside the casings 8 and 18 flows along the both guide surfaces 15 and 25, the outer follower air flow Vso and the main air flow Vm discharged along the both guide surfaces 13 and 23 Not only can they smoothly merge, but also the turbulence of the main airflow Vm at the tip portions of the both flow guide surfaces 13 and 23 can be suppressed. Further, as described above, since the air blowing units 3 and 4 are plane-symmetric with respect to the symmetry plane S, the inner substream Vsi passing through the circulation space P is connected to the first air blowing unit 3 side and the second air blowing unit 3 side. It becomes substantially uniform on the air blowing unit 4 side. Similarly, the outer secondary airflow Vso is also substantially uniform on the first air blowing unit 3 side and the second air blowing unit 4 side. Therefore, it is possible to make the generation of the secondary airflow Vs less likely to occur.

  In FIG. 6, only the main airflow Vm and the secondary airflow Vs generated by the first air blowing unit 3 are described for the sake of simplification, but the main airflow Vm is similarly applied to the second air blowing unit 4. In addition, a substream Vs is generated.

  As described above, the blower 1 of the present embodiment includes the first blower unit configured by accommodating the first cross-flow fan 9 in the first fan casing 8 having the first suction port 11 and the first blower port 12. 3 and the second air blowing part 4 configured to accommodate the second cross-flow fan 19 in the second fan casing 18 having the second suction port 21 and the second blower port 22, with a predetermined gap G. The first air outlet 12 and the second air outlet 22 are provided so as to open to the front side, and the first air outlet 12 and the second air outlet 22 are respectively provided in front of the downstream side of the first air outlet 12 and the second air outlet 22. By providing the one flow surface 13 and the second flow surface 23, the main airflow Vm generated by the cross flow fans 9 and 19 is blown forward from both the air outlets 12 and 22, and then by the Coanda effect. While flowing along both flow guide surfaces 13 and 23, along with the main airflow Vm Since the air flow Vs is generated in the distribution space P between the air blowing units 3 and 4 and the outside of the air blowing units 3 and 4, it is possible to send a larger amount of wind than the main air flow Vm and to suppress noise. Furthermore, dust on the installation surface such as the floor F can be made difficult to be scattered.

  Further, by making the first air blowing part 3 and the second air blowing part 4 substantially plane-symmetrical with respect to the symmetry plane S, the sub-air flow Vs in the circulation space P between the air blowing parts 3 and 4 is obtained. It is possible to make the generation less likely to be biased.

  Further, by providing the first suction port 11 and the second suction port 21 outward with respect to the symmetry plane S, the outside air between the air blowing units 3 and 4 can be hardly sucked from the suction ports 11 and 21. The flow rate can be further increased by sending more air forward between the air blowing units 3 and 4 as the inner substream Vsi.

  Further, a first guide surface 15 that is substantially parallel to the symmetric surface S is provided in the vicinity of the antisymmetric surface S side of the first flow guide surface 13, and on the antisymmetric surface S side of the second flow guide surface 23. By providing a second guide surface 25 that is close to and parallel to the symmetry plane S, the external follower air flow Vso generated outside the air blowing sections 3 and 4 is discharged along the both air guide surfaces 13 and 23. In addition to being able to smoothly merge with the main airflow Vm, the disturbance of the main airflow Vm at the ends of the both flow guide surfaces 13 and 23 can be suppressed.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the blower 31 of this embodiment, the first cross flow fan 9 and the second cross flow fan 19 are driven by a common electric motor 32. The first cross flow fan 9 and the second cross flow fan 19 are configured to rotate in the opposite directions by the gear group 33. Since other configurations are the same as those in the first embodiment, the description thereof is omitted. Moreover, since an effect | action and an effect are also common in 1st embodiment, description is abbreviate | omitted.

  Next, a third embodiment of the present invention will be described with reference to FIGS. 41 is a blower of the present invention. The blower 41 includes the base 2, the first blower 43, the second blower 44, and the head 5. The first air blowing part 43 and the second air blowing part 44 are each configured to be vertically long, and are provided side by side with a gap G in front view. The first blower 43 and the second blower 44 are substantially plane-symmetric with respect to the symmetry plane S.

  The base 2 is configured to be installed on an installation surface such as a floor F. A first motor 6 and a second motor 7 are accommodated in the base 2.

The first air blowing part 43 is provided on the upper left side of the base part 2. The first air blowing section 43 includes a vertically long first fan casing 48 and a first cross flow fan 49. The first fan casing 48 has a fan accommodating chamber 50 therein, a vertically long first suction port 51 at the rear, and a vertically long first air outlet 52 at the front. The first air outlet 52 opens forward, and a vertically long first flow guide surface 53 is formed on the downstream side (that is, the front side). The first flow guide surface 53 is provided on the antisymmetric surface S side of the first air outlet 52. In addition, the first flow guide surface 53 has a convex shape on the upstream side and a downstream side on the downstream side so that the distance from the second flow guide surface 63 to be described later increases toward the front and the main air flow Vm flows almost directly in front. It is formed in a smooth curved surface that is concave. And the convex part of said 1st flow surface 53 protrudes a little rather than the virtual extension surface of the side surface 54 by the side of the symmetrical surface S in the vicinity of said 1st blower outlet 52. As shown in FIG. Further, a first guide surface 55 is formed close to the anti-symmetric surface S side of the first flow guide surface 53. The first guide surface 55 is formed substantially parallel to the symmetry plane S. The first transverse fan 49 is accommodated in the fan accommodating chamber 50. The first cross flow fan 49, a plurality of fins are arranged in annular, being formed as a whole an elongated cylindrical, with the rotation axis X ₃ is provided so as to be perpendicular, the first electric motor in said base portion 2 6 is connected. The first suction port 51 is provided with a louver 56 for preventing a user's finger or the like from touching the first cross flow fan 49. The first flow guide surface 53 is provided on the centrifugal side of the first air outlet 52.

The second air blowing part 44 is provided on the upper right side of the base part 2. The second air blowing unit 44 includes a vertically long second fan casing 58 and a second transverse flow fan 59. The second fan casing 58 has a fan accommodating chamber 60 therein, a vertically long second suction port 61 at the rear, and a vertically long second air outlet 62 at the front. The second air outlet 62 opens forward, and a vertically long second flow guide surface 63 is formed on the downstream side (that is, the front side). The second flow guide surface 63 is provided on the antisymmetric surface S side of the second air outlet 62. Further, the distance between the second flow guide surface 63 and the first flow guide surface 53 increases toward the front, and the upstream side is convex and the downstream side is concave so that the main airflow Vm flows almost directly in front. Formed into a smooth curved surface. And the convex part of said 2nd flow surface 63 protrudes a little rather than the virtual extension surface of the side surface 64 by the side of the symmetrical surface S in the vicinity of said 2nd blower outlet 62. As shown in FIG. Further, a second guide surface 65 is formed close to the anti-symmetric surface S side of the second flow guide surface 63. The second guide surface 65 is formed substantially parallel to the symmetry plane S. The second transverse fan 59 is accommodated in the fan accommodating chamber 60. The second cross flow fan 59, a plurality of fins are arranged in annular, being formed as a whole an elongated cylindrical, with the rotation axis X ₄ are provided so as to be perpendicular, the second electric motor within said base 2 7 is connected. The second suction port 61 is provided with a louver 66 for preventing a user's finger or the like from touching the second transverse flow fan 59. The second flow guide surface 63 is provided on the centrifugal side of the second air outlet 62.

  As described above, the first air blowing part 43 and the second air blowing part 44 are substantially plane symmetric with respect to the symmetry plane S. Accordingly, the shape of the first fan casing 48 and the shape of the second fan casing 58 are opposite to each other. Specifically, the first fan casing 48 is formed such that the first air outlet 52 is biased to the left side, which is slightly antisymmetrical surface S side. On the other hand, the second fan casing 58 is formed such that the second air outlet 62 is biased to the right side, which is slightly on the antisymmetric surface S side. The first fan casing 48 is formed such that the first flow guide surface 53 is curved on the left side which is the antisymmetric surface S side of the first air outlet 52. On the other hand, the second fan casing 58 is formed such that the second flow guide surface 63 is curved on the right side which is the antisymmetric surface S side of the second air outlet 62. Further, the first fan casing 48 is formed such that the first guide surface 55 is close to the left side which is the antisymmetric surface S side of the first flow guide surface 53. On the other hand, the second fan casing 58 is formed such that the second guide surface 65 is close to the right side which is the antisymmetric surface S side of the second flow guide surface 63. The first cross flow fan 49 and the second cross flow fan 59 are also substantially plane-symmetric with respect to the symmetry plane S (note that the positions of the first cross flow fan 49 and the second cross flow fan 59 are the same). The phase difference is not taken into account.) That is, the first cross-flow fan 49 and the second cross-flow fan 59 have the fins formed in opposite directions, and the rotation direction of the first cross-flow fan 49 is counterclockwise in plan view. The direction of rotation of the cross flow fan 59 is clockwise in plan view.

  The head 5 is provided to connect the upper end of the first blower 43 and the upper end of the second blower 44. An operation unit 28 is provided on the head 5.

The difference between the present embodiment and the first embodiment is the rotational direction of the cross flow fan and the formation position of the flow guide surface. That is, in the present embodiment, the rotation direction of the first cross-flow fan 49 is counterclockwise in a plan view, and the rotation direction of the second cross-flow fan 59 is clockwise in a plan view. In this embodiment, the rotation direction of the first cross-flow fan 9 is clockwise in a plan view, and the rotation direction of the second cross-flow fan 19 is counterclockwise in a plan view. In the present embodiment, the first flow guide surface 53 and the second flow guide surface 63 are provided on the centrifugal side of the first air outlet 52 and the second air outlet 62, respectively. In the embodiment, the first flow guide surface 13 and the second flow guide surface 23 are provided on the rotation axes X ₁ and X ₂ sides of the first blow-out port 12 and the second blow-out port 22, respectively.

Next, the operation of this embodiment will be described. When the user operates the operation unit 28 to start the operation of the blower 41, the electric motors 6 and 7 are activated. When these electric motors 6 and 7 operate, the cross flow fans 49 and 59 of the air blowing parts 43 and 44 rotate around the rotation axes X ₃ and X ₄ . As described above, the first cross-flow fan 49 rotates counterclockwise in plan view. On the other hand, the second cross-flow fan 59 rotates clockwise in plan view. The rotational speed of the first cross flow fan 49 is the same as the rotational speed of the second cross flow fan 59. As the first cross-flow fan 49 rotates, outside air is sucked from the first suction port 51 and blown out from the first blow-out port 52 vigorously. As shown in FIG. 10, the airflow blown out from the first blowout port 52 along the first flow guide surface 53 in the circulation space P defined between the air blowing parts 43 and 44 by the Coanda effect. It flows to the outside and further flows almost directly in the vicinity of the tip of the first flow guide surface 53. Similarly, when the second cross-flow fan 59 rotates, outside air is sucked from the second suction port 61 and blown out from the second blow-out port 62 vigorously. As shown in FIG. 10, the airflow blown out from the second air outlet 62 also flows outward along the second airflow surface 63 in the circulation space P by the Coanda effect, and further, the second airflow Near the tip of the surface 63, it flows almost directly in front. Thus, both the said ventilation parts 43 and 44 generate the main airflow Vm, respectively.

  As described above, since both the suction ports 51 and 61 are formed vertically long, the outside air is sucked from a wide range in the vertical direction. For this reason, a large amount of dust on the installation surface such as the floor F is not sucked and scattered. Further, since the source of the main air flow Vm is the cross-flow fans 49 and 59 with relatively low operating noise, noise can be suppressed low.

  And the said ventilation parts 43 and 44 generate | occur | produce the main airflow Vm, respectively, and the substream Vs is generate | occur | produced with these main airflows Vm. The secondary air flow Vs includes an internal secondary air flow Vsi that flows through the distribution space P and an external secondary air flow Vso that flows through the antisymmetric surface S side (that is, the outside) of the air blowing portions 43 and 44. The transverse fans 49 and 59 suck outside air from behind, and a part of the outside air behind the circulation space P passes through the circulation space P as an inner substream Vsi. Further, the main air flow Vm flows along the both flow guide surfaces 53 and 63, so that the inner sub flow Vsi is generated so as to be dragged by the main air flow Vm along the both flow guide surfaces 53 and 63. At the same time, the main air flow Vm flows along the both flow guide surfaces 53 and 63, so that a low pressure region is created in the circulation space P, and outside air enters the circulation space P from the upstream side (that is, the rear side) of the circulation space P. Flows in. As described above, the main air flow Vm flows along the both flow guide surfaces 53 and 63, so that a larger air volume can be generated as compared with the case where the main air flow Vm is merely blown out from the air outlets 52 and 62. Further, as described above, the first guide surface 55 and the second guide surface 65 are provided close to the anti-symmetric surface S side (that is, the outer side) of the both flow guide surfaces 53 and 63, respectively. Since the outer follower air flow Vso generated outside the casings 48 and 58 flows along the both guide surfaces 55 and 65, the outer follower air flow Vso and the main air flow Vm discharged along the both guide surfaces 53 and 63 Not only can they smoothly merge, but also the turbulence of the main airflow Vm at the ends of both the flow guide surfaces 53 and 63 can be suppressed. Furthermore, as described above, since both the air blowing portions 43 and 44 are plane-symmetrical with respect to the symmetry plane S, the inner substream Vsi passing through the circulation space P is connected to the first air blowing portion 43 side and the second air blowing portion 43 side. It becomes substantially equal on the air blower 44 side. Similarly, the outer secondary airflow Vso is also substantially uniform on the first air blowing unit 43 side and the second air blowing unit 44 side. Therefore, it is possible to make the generation of the secondary airflow Vs less likely to occur.

  In FIG. 11, only the main airflow Vm and the secondary airflow Vs generated by the first air blowing unit 43 are described for simplification of description, but the main airflow Vm is similarly applied to the second air blowing unit 44. In addition, a substream Vs is generated.

  As described above, the blower 41 of the present embodiment includes the first blower unit configured by accommodating the first cross-flow fan 49 in the first fan casing 48 having the first suction port 51 and the first blower port 52. 43 and a second air blowing part 44 configured to house a second cross-flow fan 59 in a second fan casing 58 having a second inlet 61 and a second outlet 62, with a predetermined gap G. The first air outlet 52 and the second air outlet 62 are both provided so as to open to the front side, and the first air outlet 52 and the second air outlet 62 are respectively provided in front of the downstream side of the first air outlet 52 and the second air outlet 62. By providing the one flow surface 53 and the second flow surface 63, the main airflow Vm generated by the cross flow fans 49 and 59 is blown forward from both the air outlets 52 and 62, and then by the Coanda effect. While flowing along both flow guide surfaces 53 and 63, the main airflow Since the secondary air flow Vs is generated in the distribution space P between the air blowing portions 43 and 44 and the outside of the air blowing portions 43 and 44 along with m, it is possible to send a wind having a larger flow rate than the main air flow Vm. Noise can be suppressed low, and dust on the installation surface such as the floor F can be made difficult to be scattered.

  In addition, the first air blowing portion 43 and the second air blowing portion 44 are substantially plane-symmetrical with respect to the symmetry plane S, so that the sub-airflow Vs in the circulation space P between the air blowing portions 43 and 44 is obtained. It is possible to make the generation less likely to be biased.

  Further, a first guide surface 55 that is substantially parallel to the symmetric surface S is provided adjacent to the anti-symmetric surface S side of the first flow guide surface 53, and on the anti-symmetric surface S side of the second flow guide surface 63. By providing a second guide surface 65 that is close to and parallel to the symmetry surface S, the outer follower air flow Vso generated outside the air blowing portions 43 and 44 is discharged along the both air flow surfaces 53 and 63. In addition to being able to smoothly merge with the main airflow Vm, the turbulence of the main airflow Vm at the end portions of both the flow guide surfaces 53 and 63 can be suppressed.

  Next, a fourth embodiment of the present invention will be described based on FIGS. 71 is a blower of the present invention. The blower 71 includes a base 72, a first blower 73, a second blower 74, a third blower 75, and a fourth blower 76. The first blower 73 and the second blower 74 are each configured to be vertically long, and are provided side by side with a gap Gx in a front view. Similarly, the said 3rd ventilation part 75 and the 4th ventilation part 76 are provided in the up-down direction with the space | interval Gy by front view. And the said 1st ventilation part 73, the 2nd ventilation part 74, the 3rd ventilation part 75, and the 4th ventilation part 76 are arranged in a square shape, and are integrally formed. Further, the first to fourth air blowing parts 73, 74, 75, 76 are substantially plane symmetric with respect to the symmetry plane S. The structure of the first to fourth air blowing parts 73, 74, 75, 76 is the same as that of the first embodiment. Therefore, description of other configurations is omitted. Moreover, since an effect | action and an effect are also common in 1st embodiment, description is abbreviate | omitted.

  In addition, this invention is not limited to the above embodiment, A various deformation | transformation implementation is possible within the range of the summary of invention. For example, in each of the above embodiments, the flow guide surface is provided so as to face the flow space defined between the air blowing portions. However, the flow guide surface for keeping the main air flow along the outside of the flow space by the Coanda effect. May be provided. Moreover, in each said embodiment, although the inlet port was formed so that it might face the back diagonally outer side or the back, it was sufficient by devising, such as the space | interval of ventilation parts, the shape of a current-flow surface, or the shape of a crossflow fan. If the secondary airflow can be generated in the circulation space, the suction port may be opened so as to face the rearward diagonally inner side.

1, 31, 41, 71 Blower 3, 43, 73 First blower 4, 44, 74 Second blower 8, 48 First fan casing 9, 49 First crossflow fan 11, 51 First inlet 12, 52 1st blower outlet 13,53 1st flow surface 15,55 1st guide surface 18,58 2nd fan casing 19,59 2nd crossflow fan 21,61 2nd inlet port 22,62 2nd blower port 23 63 Second guide surface 25, 65 Second guide surface G Gap S Symmetry surface Vm Main air flow Vs Sub-air flow

Claims (4)

A first air blowing part configured to accommodate a first cross-flow fan in a first fan casing having a first inlet and a first outlet, and a second fan casing having a second inlet and a second outlet A second air blower configured to accommodate the second cross-flow fan therein,
The first air blowing part and the second air blowing part are provided at a predetermined interval, and the first air outlet and the second air outlet are both provided to open to the front side, and the first air outlet and A blower characterized in that a first flow guide surface and a second flow guide surface are provided on the downstream side of the second air outlet, respectively.   The blower according to claim 1, wherein the first blower and the second blower have a substantially plane-symmetric structure.   The blower according to claim 2, wherein the first suction port and the second suction port are provided outward with respect to a symmetry plane.   Providing the first guide surface substantially parallel to the symmetry plane close to the anti-symmetric surface side of the first flow guide surface, close to the anti-symmetric surface side of the second flow guide surface, The blower according to claim 2, wherein a substantially parallel second guide surface is provided.

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