WO2011083723A1

WO2011083723A1 - Air blowing fan, circulator, micro-particle diffusion device, and air circulation method

Info

Publication number: WO2011083723A1
Application number: PCT/JP2010/073674
Authority: WO
Inventors: 雅也高橋; 雅生大塚; 康堅竹田
Original assignee: シャープ株式会社
Priority date: 2010-01-06
Filing date: 2010-12-28
Publication date: 2011-07-14
Also published as: US20120282117A1; CN102753897B; CN102753897A

Abstract

A circulator (1) which is mounted on a side wall (S) in a room or on a ceiling wall (T) located close to the side wall (S) in a room and which circulates air present in the room. The circulator (1) comprises, in order from a first wall surface (P1) adjacent to the side wall (S) in the horizontal direction, a first outlet (4a), a second outlet (4b), and a third outlet (4c) which are disposed next to each other in the horizontal direction. A first air flow (A1) which flows along the ceiling wall (T) and descends along the first wall surface (P1) is delivered from the first outlet (4a), a second air flow (A2) which flows along the ceiling wall (T) and descends along a second wall surface (P2) facing the side wall (S) is delivered from the second outlet (4b), and a third air flow (A3) which flows along the ceiling wall (T) and descends along a third wall surface (P3) facing the first wall surface (P1) is delivered from the third outlet (4c).

Description

Blower fan, circulator, fine particle diffusion device, and air circulation method

The present invention relates to a blower fan that sends out airflow. The present invention also relates to a circulator for circulating indoor air and an air circulation method. The present invention also relates to a microparticle diffusing apparatus that sends microparticles such as ions and diffuses them into a room.

A conventional circulator is disclosed in Patent Document 1. This circulator is installed on the floor of the room, and has a suction opening at the bottom and an outlet at the top. By driving a blower fan arranged inside the circulator, indoor air is sucked in along the floor surface from the suction port, and the air is sent out forward and upward from the blower outlet. Thereby, indoor air can be circulated.

Further, Patent Document 2 discloses a conventional fine particle diffusion device. This fine particle diffusing device is arranged on the top surface of a refrigerator or the like, and a blower fan is provided in a housing having a blower opening at the front. The blower fan is composed of a sirocco fan that sucks in the axial direction and exhausts it in the circumferential direction, and the rotation shaft is arranged vertically. The blower fan and the blower outlet are connected by a blower path. The air blowing path is gradually widened in the left-right direction on the downstream side of the blower fan and is gradually narrowed in the up-down direction. A fine particle generator for generating ions that are fine particles is disposed in the air blowing path.

The airflow generated by the blower fan flows through the airflow path, and the airflow containing the microparticles generated by the microparticle generator is sent forward from the outlet. The air flow path is formed so as to expand in the left-right direction on the downstream side of the blower fan, and the airflow sent from the air outlet spreads in the left-right direction so that the fine particles are diffused into the room. Thereby, positive ions and negative ions can be supplied indoors to sterilize indoor floating bacteria.

Patent Document 3 discloses a circulator that includes a blower fan having a cross-flow impeller and circulates indoor air. This circulator is composed of an air conditioner, and a suction port is opened on the upper surface of the housing, and a blower port is opened on the lower front surface. A heat exchanger is disposed between the blower fan and the suction port disposed in the housing.

The blower fan consists of a cross flow fan that covers the impeller with a casing. The casing has an intake side opening from which the impeller protrudes at one end, extends to the exhaust side of the impeller, and is connected to the outlet. Thereby, the air flow path on the exhaust side of the impeller is formed by the casing. A movable louver that varies the wind direction in the horizontal direction and the vertical direction is provided in the vicinity of the air outlet in the air flow path.

When the blower fan is driven, indoor air is taken into the housing from the suction port and exchanges heat with the heat exchanger. The air exchanged with the heat exchanger is guided to the exhaust side of the blower fan through the intake side opening of the casing. And air is sent out indoors from a blower outlet, indoor air is conditioned and indoor air is circulated.

Also, air is sent in a predetermined direction from the outlet through a movable louver. As a result, air can be sent out in a plurality of directions in the room and circulated to every corner of the room.

JP-A-8-270992 (pages 2-5, FIG. 4) Japanese Patent No. 3797993 (pages 4 to 18, FIGS. 1 and 2) Japanese Unexamined Patent Publication No. 2009-270530 (pages 5-8, FIG. 1)

However, according to the conventional circulator disclosed in Patent Document 1, the air sent out from the outlet does not sufficiently diffuse in the left-right direction in the room. For this reason, there is a problem that it is difficult to circulate air to every corner of the room. If a swing mechanism for swinging the blower fan in the left-right direction is provided, air can be circulated to every corner of the room, but there is a problem that the cost of the circulator increases because the structure becomes complicated. In addition, there is a problem that the air blown forward and upward from the circulator directly hits the user in the living space in the central part of the room, which increases the user's discomfort.

Further, according to the conventional fine particle diffusing device disclosed in Patent Document 2, the airflow flowing through the blower path is spread in the left-right direction and sent forward from the outlet. For this reason, it is possible to send air and fine particles over a wide range in the left-right direction of the room with a simple configuration.

However, since the kinetic energy of the airflow sent from the outlet is taken away by the indoor air, the reach of the airflow is shortened. Further, since the flow path is narrowed in the vertical direction immediately after the blower fan, the kinetic energy of the airflow cannot be sufficiently collected, and the static pressure in the blower path is lowered. Accordingly, there is a problem that the air current does not reach the wall surface in the room far from the fine particle diffusing apparatus, and the air circulation and the fine particle diffusion cannot be performed sufficiently. On the other hand, if the rotational speed of the blower fan is increased to increase the reach of the airflow, there is a problem that noise and power consumption increase.

Also, there is a problem that the air blown forward from the fine particle diffusion device directly hits the user in the living space in the central part of the room and the user's discomfort increases.

In addition, since the blower fan exhausts in the circumferential tangent direction with the rotating shaft arranged vertically, there is a problem that the flow rate of the airflow flowing through the blower path becomes uneven in the left-right direction due to the centrifugal force of the blower fan.

In addition, there are similar problems when fine particles such as fragrances, deodorants, insecticides, and fungicides other than ions are generated by the fine particle generator.

Further, according to the circulator disclosed in Patent Document 3, a movable louver is provided to send air in a plurality of directions in the room, but there is a problem that the structure becomes complicated and the cost is increased. Further, the airflow is bent suddenly near the air outlet by the louver near the air outlet. For this reason, there existed a problem that a pressure loss became large, the ventilation efficiency worsened, and the noise increased.

Also, the louver can be omitted and the air flow path on the exhaust side of the blower fan can be branched to send air in a plurality of directions. However, in this case as well, since the air flow is bent sharply on the exhaust side of the blower fan, the air blowing efficiency is deteriorated and the noise is increased.

In addition, a microparticle diffusion device that provides a microparticle generator for generating microparticles such as ions, fragrances, deodorants, insecticides, and bactericides in the air flow path of the circulator, and sends and diffuses microparticles in the room. Has a similar problem.

An object of the present invention is to provide a circulator and an air circulation method capable of reducing power consumption and sufficiently circulating indoor air. Another object of the present invention is to provide a microparticle diffusing device that can save power and sufficiently diffuse microparticles in a room.

Another object of the present invention is to provide a blower fan capable of improving air blowing efficiency at low cost and reducing noise and sending airflow in a plurality of directions, a circulator using the same, and a fine particle diffusion device.

In order to achieve the above object, a blower fan of the present invention includes a cross-flow type impeller, a first casing that covers the impeller, forms an air flow path, and is juxtaposed in the axial direction of the impeller. It is characterized by the fact that there are two casings, and the blowing direction of the airflow passing through the first casing is different from the blowing direction of the airflow passing through the second casing.

According to this configuration, the crossflow type impeller is covered by the first casing and the second casing arranged side by side in the axial direction, and a blower fan including a crossflow fan is formed. By the rotation of the impeller, the air on the intake side of the blower fan passes through the impeller and flows through the first casing and the second casing. The airflow flowing through the first casing is blown out in a predetermined direction, and the airflow flowing through the second casing is blown out in a direction different from the airflow flowing through the first casing.

According to the present invention, in the blower fan configured as described above, the first casing opens at one end of the first intake side opening from which the impeller projects and extends to the exhaust side of the impeller, and the second casing includes the blade A second intake side opening from which the car protrudes opens at one end and extends to the exhaust side of the impeller, and an opening surface of the first intake side opening and an opening surface of the second intake side opening are formed on the impeller. It is preferable that they are arranged at different angles in the circumferential direction.

According to this configuration, the air on the intake side of the blower fan passes through the impeller by the rotation of the impeller, flows into the first casing from the first intake side opening, and flows into the second casing from the second intake side opening. To do. The opening surface of the first intake-side opening and the opening surface of the second intake-side opening are arranged at different angles in the circumferential direction of the impeller, and the first and second casings respectively have the first and second intake-side openings. And extending in a predetermined direction.

According to the present invention, in the blower fan configured as described above, the first casing in a predetermined range from the first intake side opening is the second casing in the predetermined range from the second intake side opening, as viewed from the axial direction of the impeller. It is preferable to match the shape rotated around the rotation center of the impeller. According to this configuration, the wall surface of the first casing is formed with a predetermined curvature from the first intake side opening, and the wall surface of the second casing is formed with the same curvature as the first casing within a predetermined range from the second intake side opening. The

Further, according to the present invention, in the blower fan configured as described above, the blowing direction of the airflow passing through the first casing and the blowing direction of the airflow passing through the second casing may be different by 90 ° or more.

The blower fan of the present invention is
A first impeller and a second impeller arranged coaxially;
One motor for rotationally driving the first impeller and the second impeller;
A first tubular portion covering the first impeller and opening the first intake port in the axial direction; and a first opening extending from the circumferential surface of the first tubular portion in the circumferential tangential direction and opening the first outlet at the tip. A first casing having an outlet passage;
A second cylindrical part covering the second impeller and opening the second intake port in the axial direction; a second cylindrical part extending in a circumferential tangential direction from the peripheral surface of the second cylindrical part; A second casing having an outlet passage;
The direction in which the first blowing passage extends from the first tubular portion and the direction in which the second blowing passage extends from the second tubular portion are different in the circumferential direction, and the blowing direction of the air flow blown from the first blowing outlet And the blowing direction of the airflow blown out from the second outlet is different.

According to this configuration, the first impeller and the second impeller are connected to the rotation shaft of one motor, and the first impeller and the second impeller are covered with the first casing and the second casing, respectively. Thereby, the ventilation fan which consists of a multiple centrifugal fan is formed. The first impeller and the second impeller are rotated by driving the motor, and the air is sucked into the first casing and the second casing in the axial direction via the first air inlet and the second air inlet. The air that has flowed into the first casing is exhausted in the circumferential tangential direction from the first tubular portion, flows through the first blow-out passage, and is blown out in a predetermined direction from the first blow-out port. The air flowing into the second casing is exhausted from the second tubular part in a direction different from the first blowout passage in the circumferential tangential direction, flows through the second blowout passage, and in a direction different from the second blowout outlet. Blown out.

Further, according to the present invention, in the blower fan configured as described above, it is preferable that an opening area of the first air outlet is smaller than an opening area of the second air outlet. According to this configuration, the airflow is sent out at a high speed from the first outlet having a small opening area, and the airflow is sent out at a low speed from the second outlet having a larger opening area than the first outlet.

In the blower fan configured as described above, it is preferable that the width in the direction perpendicular to the axis of the first outlet is smaller than the width in the direction perpendicular to the axis of the second outlet.

Further, according to the present invention, in the blower fan configured as described above, the first blowing passage is gradually enlarged in the direction perpendicular to the flow path in the direction perpendicular to the axis, and the first blowing outlet is perpendicular to the axis on the downstream side of the upstream portion. And a downstream portion in which the flow path is kept constant or gradually reduced in the direction, and the second blowing passage gradually moves the flow path in the direction perpendicular to the axis between the second tubular portion and the second blow-out opening. It is preferable to be enlarged.

According to this configuration, the airflow flowing through the first blow-out passage collects kinetic energy at the upstream portion that is gradually expanded in the direction perpendicular to the flow path and is converted into static pressure. The air flow is suppressed in the downstream portion where the flow path is kept constant or gradually reduced, and the flow velocity is reduced. And airflow is sent out from the 1st blower outlet with a small opening area at high speed. The airflow flowing through the second blowing passage is gradually enlarged in the direction perpendicular to the axis of the flow path, and kinetic energy is recovered and converted to static pressure until reaching the second blowing outlet. And an air current is sent out from a 2nd blower outlet with a larger opening area than a 1st blower outlet at low speed.

Further, the present invention, in the blower fan configured as described above, includes a disk in which the first impeller and the second impeller are connected to the motor, and blades that are erected radially on both surfaces of the disk, More preferably, the first intake port and the second intake port are provided on both axial surfaces of the first cylindrical portion and the second cylindrical portion, respectively.

Further, the present invention provides a circulator that is installed on one side wall of a room or a ceiling wall adjacent to one side wall of the room and circulates the air in the room, from the side closer to the first wall surface horizontally adjacent to the one side wall. A first air outlet, a second air outlet, and a third air outlet that are arranged side by side in order in the horizontal direction are provided, and the first air stream that flows along the ceiling wall and descends along the first wall surface is provided from the first air outlet. The second air stream that is sent out, circulates along the ceiling wall and descends along the second wall surface facing the one side wall is sent out from the second air outlet, circulates along the ceiling wall, and faces the first wall surface The third airflow descending along the third wall surface is sent out from the third outlet.

According to this configuration, the circulator is attached to, for example, one side wall of the room, and the first air outlet, the second air outlet, and the third air outlet are provided in this order from the right toward the room. The first air stream sent to the right from the first air outlet flows along the ceiling wall and descends along the right side wall (first wall surface). The second air stream sent forward from the second outlet flows along the ceiling wall and descends along the side wall (second wall surface) facing the mounting surface. The third air stream sent out from the third outlet toward the left flows along the ceiling wall and descends along the left side wall (third wall surface). The airflow descending the first wall surface, the second wall surface, and the third wall surface flows through the indoor floor surface, rises up the attachment surface, and returns to the circulator. Thereby, an air current circulates along the wall surface of the room, and the air in the living space in the center of the room circulates gently. Since the first, second, and third airflows travel along the wall surface by the Coanda effect, the kinetic energy taken away by the indoor air is suppressed, and the reach of the airflow can be increased.

In the circulator having the above-described configuration, the present invention further includes a blower fan including a centrifugal fan or a once-through fan, and a blower path in which the blower fan is disposed with a rotation axis horizontal, and the blower path is a part of the blower fan. The first air outlet, the second air outlet, and the third air outlet, which are divided at the downstream side, have a first divided passage, a second divided passage, and a third divided passage that open to the front end, respectively. It is preferable that the inner wall surface of the three-divided passage is inclined with respect to the vertical plane.

According to this configuration, the air sent in the circumferential direction from the blower fan that has a rotating shaft arranged horizontally is branched and circulated into the first divided passage, the second divided passage, and the third divided passage. The air flowing through the first division passage is guided, for example, in the right direction along the wall surface inclined with respect to the vertical plane, and the first airflow is sent out from the first outlet. The air flowing through the second divided passage is guided forward, and the second air stream is sent out from the second outlet. The air flowing through the third divided passage is guided, for example, in the left direction along the wall surface inclined with respect to the vertical plane, and the third air stream is sent out from the third outlet.

Further, in the circulator having the above-described configuration, the present invention preferably includes a fourth air outlet that sends out a fourth airflow flowing along one side wall downward. According to this structure, the 4th air current sent out downward from the 4th blower outlet falls along an attachment surface.

In the circulator configured as described above, it is preferable that the circulator includes a fourth air outlet that sends out a fourth airflow directed forward and downward, and the flow rate of the fourth airflow is smaller than that of the second airflow. According to this structure, the 4th airflow sent toward the front lower direction from the 4th blower outlet is directly supplied to indoor living space. At this time, since the flow rate of the fourth air stream is smaller than the flow rate of the second air stream, discomfort caused by the fourth air stream directly hitting the user is suppressed.

Further, the present invention provides a housing that opens the suction port and the air outlet, an air passage that is provided in the housing by connecting the air inlet and the air outlet, and is disposed in the air passage in the circumferential direction. A circulator for sending indoor air flowing into the air flow path from the suction port and circulating the air in the room, wherein the air flow path is downstream of the air blowing fan. A vertical direction expansion part that gradually expands the flow path in the vertical direction of the rotation axis of the blower fan on the side, and a flow path that is gradually expanded in the axial direction of the rotation axis on the downstream side of the vertical expansion part and And an axially enlarged portion that is maintained constant in the vertical direction of the rotation axis or that is gradually reduced.

According to this configuration, the blower fan is composed of a centrifugal fan or a cross-flow fan, and for example, the rotation shaft is arranged horizontally. By driving the blower fan, indoor air flows into the blower path from the suction port and is exhausted in the circumferential direction of the blower fan. The vertical expansion portion on the downstream side of the blower fan is gradually expanded in the vertical direction, recovering the kinetic energy of the airflow and converting it into a static pressure. The axially enlarged portion on the downstream side of the vertically enlarged portion gradually expands in the left-right direction and is constant or reduced in the up-down direction. As a result, the airflow flowing through the axially enlarged portion is expanded in the left-right direction and a decrease in the flow velocity is suppressed. And an air current is sent to the wide range of the left-right direction from a blower outlet, and indoor air circulates. The rotation axis of the blower fan may be arranged inclined with respect to the horizontal, or may be arranged vertically.

In the circulator having the above-described configuration, the present invention is preferably enlarged as the flow path area of the axially enlarged portion becomes downstream. According to this configuration, the kinetic energy of the airflow flowing through the axially enlarged portion is recovered and converted to static pressure.

In the circulator having the above-described configuration, the present invention preferably includes a plurality of divided passages that are divided in the axial direction of the rotating shaft continuously from the vertical enlarged portion and the axial enlarged portion. According to this configuration, the airflow flows along the wall surface of the divided passage and is smoothly spread in the axial direction of the rotating shaft.

According to the present invention, in the circulator having the above-described configuration, the casing is disposed in the vicinity of an indoor ceiling wall with the rotating shaft disposed horizontally, and the outlet is formed at an upper end of the casing. It is more preferable to send the airflow along the ceiling wall. According to this structure, the airflow sent along the indoor ceiling wall from the blower outlet circulates along the ceiling wall by the Coanda effect, and the reach distance of the airflow can be further increased.

Further, the present invention provides the circulator having the above-described configuration, wherein the casing is disposed in the vicinity of an indoor ceiling wall with the rotation shaft disposed horizontally, and the outlet is formed at a lower portion of the casing. It is more preferable to send the airflow upward from the top. According to this configuration, the airflow sent upward from the air outlet reaches the indoor ceiling wall and circulates along the ceiling wall due to the Coanda effect, so that the reach distance of the airflow can be further increased.

Further, the circulator of the present invention includes the above-described crossflow type blower fan, and is characterized by sending airflow in a plurality of directions toward the room to circulate the air in the room. According to this structure, the airflow which distribute | circulates a 1st casing is sent out indoors, and the airflow which distribute | circulates a 2nd casing is sent out in the direction different from the airflow which distribute | circulates a 1st casing. The air sent into the room circulates in the room and returns to the intake side of the blower fan.

In the circulator having the above-described configuration, it is preferable that the air flow is sent into the room horizontally or forward and upward by the first casing, and the air flow is sent to the room downward by the second casing. According to this configuration, the airflow flowing through the first casing is sent into the room horizontally or upwardly and circulates in the room. The airflow flowing through the second casing is sent downward into the room and flows along the wall surface on which the circulator is provided.

Further, the circulator of the present invention is characterized in that a blower fan comprising the above-described multiple centrifugal fans is provided in the housing, and air is circulated in a plurality of directions toward the room to circulate the room air. According to this structure, the airflow which distribute | circulates a 1st casing is sent out indoors, and the airflow which distribute | circulates a 2nd casing is sent out in the direction different from the airflow which distribute | circulates a 1st casing. The air sent into the room circulates in the room and returns to the intake side of the blower fan.

In the circulator having the above-described configuration, the first casing sends an air flow vertically upward or rearward upward from the first air outlet, and the second casing sends an air current upward from the second air outlet toward the upper front. May be. According to this configuration, when the circulator is installed in the vicinity of the corner between the one side wall and the floor surface of the room, the airflow flowing through the first casing is blown out along the side wall from the first outlet. The airflow returns to the circulator through the ceiling wall, the side wall facing the circulator, and the floor surface. The airflow flowing through the second casing is sent from the second air outlet toward the indoor living space, and returns to the circulator through the floor surface.

Further, according to the present invention, in the circulator having the above-described configuration, the first casing sends an air flow from the first air outlet toward the front or the front upper side, and the second casing causes the air current to flow from the second air outlet toward the front lower side in the room. It may be sent out. According to this configuration, when the circulator is installed in the vicinity of the corner between the indoor side wall and the ceiling wall, the airflow flowing through the first casing is blown out from the first outlet along the ceiling wall. The airflow returns to the circulator through the side wall facing the circulator, the floor, and the side wall on which the circulator is arranged. The airflow flowing through the second casing is sent from the second air outlet toward the indoor living space, and returns to the circulator through the floor surface and the side wall on which the circulator is arranged.

Further, according to the present invention, in the circulator having the above-described configuration, a first air outlet and a second air outlet are provided on one surface of the casing, and the installation surface facing the one surface is in contact with the indoor floor surface and is installed on the floor surface. In addition, it is preferable that the installation surface can be installed on the side wall in contact with the side wall of the room. According to this configuration, the circulator can cope with both floor placement and wall hanging, and in both cases, indoor air can be circulated well.

In the circulator configured as described above, the present invention may include a HEPA filter that collects dust of air flowing into the first casing and the second casing. According to this configuration, air from which dust has been removed by the HEPA filter is sent out indoors. Although the pressure loss is increased by the HEPA filter, the blowing efficiency is prevented from being lowered by the blowing fan formed by the centrifugal fan having a high static pressure.

The present invention also relates to a microparticle diffusion device that has a microparticle generator that generates microparticles and that is installed on one side wall of a room or a ceiling wall close to one side wall of a room to send microparticles into the room. The first air outlet, the second air outlet, and the third air outlet are arranged in the horizontal direction in order from the side closest to the first wall surface horizontally adjacent to the one side wall, and circulate along the ceiling wall. A first airflow descending along the first wall surface is sent out from the first air outlet, and a second airflow flowing along the ceiling wall and descending along the second wall surface facing the one side wall is sent to the second air outlet. The third airflow is sent from the third blowout port and is sent along the ceiling wall and descends along the third wall surface facing the first wall surface.

According to this configuration, the microparticle diffusion device is attached to, for example, one side wall of the room, and air containing microparticles is sent into the room. The first air stream sent to the right from the first air outlet flows along the ceiling wall and descends along the right side wall (first wall surface). The second air stream sent forward from the second outlet flows along the ceiling wall and descends along the side wall (second wall surface) facing the mounting surface. The third air stream sent out from the third outlet toward the left flows along the ceiling wall and descends along the left side wall (third wall surface). The airflow descending the first wall surface, the second wall surface, and the third wall surface flows through the floor surface in the room, rises on the attachment surface, and returns to the fine particle diffusion device. Thereby, the airflow containing microparticles circulates along the wall surface of the room, and the microparticles diffuse gently into the living space in the center of the room. Since the first, second, and third airflows travel along the wall surface by the Coanda effect, the kinetic energy taken away by the indoor air is suppressed, and the reach of the airflow can be increased.

Further, the present invention provides a housing that opens the suction port and the air outlet, an air passage that is provided in the housing by connecting the air inlet and the air outlet, and is disposed in the air passage in the circumferential direction. A blower fan for sending airflow and a fine particle generator arranged on the downstream side of the blower fan to generate fine particles, and the indoor air flowing into the blower path from the suction port contains fine particles. In the fine particle diffusing device that is sent out from the blower outlet, the blower path has a vertical enlargement part that gradually enlarges the flow path in the direction perpendicular to the rotation axis of the blower fan on the downstream side of the blower fan, and the vertical enlargement And an axially enlarged portion that gradually expands in the axial direction of the rotating shaft and maintains or gradually reduces the flow path in the vertical direction of the rotating shaft.

According to this configuration, the blower fan is composed of a centrifugal fan or a cross-flow fan, and for example, the rotation shaft is arranged horizontally. By driving the blower fan, indoor air flows into the blower path from the suction port and is exhausted in the circumferential direction of the blower fan. The vertical expansion portion on the downstream side of the blower fan is gradually expanded in the vertical direction, recovering the kinetic energy of the airflow and converting it into a static pressure. The axially enlarged portion on the downstream side of the vertically enlarged portion gradually expands in the left-right direction and is constant or reduced in the up-down direction. Thereby, the airflow which distribute | circulates an axial direction expansion part is expanded in the left-right direction, and the fall of the flow velocity is suppressed. And the airflow containing the microparticles generated by the microparticle generator is sent from the outlet to a wide range in the left-right direction, and the microparticles diffuse in the room. The rotation axis of the blower fan may be arranged inclined with respect to the horizontal, or may be arranged vertically.

A fine particle diffusion device of the present invention includes the cross-flow type blower fan and a fine particle generation device that generates fine particles, and sends an air flow containing the fine particles in a plurality of directions toward the room. It is characterized by diffusing fine particles. According to this configuration, the fine particles generated by the fine particle generator are included in the airflow flowing through the first casing and the second casing. The airflow flowing through the first casing is sent out indoors, and the airflow flowing through the second casing is sent out in a different direction from the airflow flowing through the first casing. Thereby, microparticles are diffused in the room.

In the fine particle diffusing apparatus having the above-described configuration, it is preferable that the air flow is sent into the room horizontally or forward and upward by the first casing, and the air flow is sent to the room downward by the second casing. According to this configuration, the airflow that circulates through the first casing is sent into the room horizontally or forward and upward, and microparticles are diffused into the room. The airflow flowing through the second casing is sent downward into the room, flows along the wall surface on which the microparticle diffusion device is provided, and microparticles are supplied downward.

The fine particle diffusing device of the present invention includes a fine particle generating device that generates fine particles in the circulator having the multiple centrifugal fans, and sends an air flow including the fine particles in a plurality of directions toward the room. It is characterized by diffusing fine particles. According to this configuration, the fine particles generated by the fine particle generator are included in the airflow flowing through the first casing and the second casing. The airflow flowing through the first casing is sent out indoors, and the airflow flowing through the second casing is sent out in a different direction from the airflow flowing through the first casing. Thereby, microparticles are diffused in the room.

Further, according to the present invention, in the fine particle diffusing apparatus having the above-described configuration, the fine particles generated by the fine particle generator may include any of ions, fragrances, deodorants, insecticides, and bactericides.

The present invention is also directed to an air circulation method in which indoor air is circulated by a circulator installed in the vicinity of a corner between one side wall and a ceiling wall of the room, wherein the circulator is disposed on the first wall surface horizontally adjacent to the one side wall. A first air outlet, a second air outlet, and a third air outlet that are juxtaposed in the horizontal direction in order from the nearest one are provided, and the first airflow that flows along the ceiling wall and descends along the first wall surface is first. A second air stream that is sent out from the air outlet, flows along the ceiling wall, and descends along the second wall surface facing the one side wall is sent out from the second air outlet, and flows along the ceiling wall to be the first. The third airflow descending along the third wall surface facing the wall surface is sent out from the third air outlet.

According to the present invention, a first air outlet, a second air outlet, and a third air outlet that are juxtaposed in the horizontal direction are provided, and the first airflow that flows along the ceiling wall and descends along the first wall surface is provided. A second air stream that is sent out from the first outlet, circulates along the ceiling wall, and descends along the second wall surface facing the one side wall is sent out from the second outlet and circulated along the ceiling wall. A third airflow descending along the third wall surface facing the one wall surface is sent out from the third air outlet.

Thus, since the first, second, and third airflows travel along the wall surface by the Coanda effect, the kinetic energy taken away by the indoor air is suppressed, and the reach of the airflow can be increased. Therefore, it is possible to save power, and since airflow is not directly supplied to the living space, user discomfort can be reduced and indoor air can be circulated sufficiently.

Further, according to the present invention, the vertical expansion section gradually expands the flow path in the vertical direction of the rotation axis of the blower fan, and the axial expansion section moves the flow path on the downstream side of the vertical expansion section of the rotation axis of the blower fan. Since it gradually expands in the axial direction and is maintained constant or gradually contracts in the vertical direction, non-uniform flow rate due to the centrifugal force of the blower fan can be prevented. In addition, after the kinetic energy of the airflow is sufficiently converted into static pressure by the vertical expansion portion and the static pressure is increased, the airflow is spread in the axial direction by suppressing the speed reduction of the airflow at the axial expansion portion. Thereby, power saving can be achieved and the reach of the airflow can be increased. Therefore, indoor air can be circulated sufficiently.

Further, according to the fine particle diffusing apparatus of the present invention, power saving can be achieved and the fine particles can be sufficiently diffused in the room. In addition, since airflow is not directly supplied to the living space, user discomfort can be reduced.

Further, according to the present invention, the first and second casings covering the impeller of the crossflow type blower fan are arranged side by side in the axial direction of the impeller, and the blowing direction of the airflow passing through each of them is different. The airflow can be sent out in the direction of. Further, since the air flow is not bent suddenly, the pressure loss can be prevented from being lowered, and the blowing efficiency can be improved and the noise can be reduced.

According to the present invention, the first and second impellers arranged coaxially are driven by one motor. A direction in which the first blowing passage extends from the circumferential surface of the first cylindrical portion covering the first impeller and a direction in which the second blowing passage extends from the circumferential surface of the second cylindrical portion covering the second impeller are circumferential. The direction of the airflow blown out from the first air outlet differs from the direction of the airflow blown out from the second air outlet. Thereby, airflow can be sent out in a plurality of directions with a simple configuration. Further, since the air flow is not bent suddenly, an increase in pressure loss can be prevented, and the air blowing efficiency can be improved and noise can be reduced.

The perspective view which looked at the microparticle diffusion apparatus of a 1st embodiment of the present invention from the upper part The perspective view which looked at the microparticle diffusion apparatus of a 1st embodiment of the present invention from the lower part The front view of the microparticle diffusion apparatus of 1st Embodiment of this invention Side sectional view of the AA section of FIG. 3 is a cross-sectional top view taken along line BB in FIG. The figure which shows the indoor airflow state of the microparticle diffusion apparatus of 1st Embodiment of this invention. Side surface sectional drawing of the microparticle diffusion apparatus of 2nd Embodiment of this invention. Side surface sectional drawing of the microparticle diffusion apparatus of 3rd Embodiment of this invention. Side surface sectional drawing of the microparticle diffusion apparatus of 4th Embodiment of this invention. The perspective view which looked at the microparticle diffusion apparatus of 5th Embodiment of this invention from upper direction The perspective view which looked at the microparticle diffusion apparatus of 5th Embodiment of this invention from the downward direction The front view of the microparticle diffusion apparatus of 5th Embodiment of this invention 12 is a side sectional view taken along the line DD in FIG. Side sectional view of the EE cross section of FIG. 12 is a cross-sectional top view taken along the line CC of FIG. The figure which shows the air flow state of the room | chamber interior of the microparticle diffusion apparatus of 5th Embodiment of this invention. The perspective view of the microparticle diffusion apparatus of 6th Embodiment of this invention. Side surface sectional drawing of the microparticle diffusion apparatus of 6th Embodiment of this invention. Front sectional drawing which shows the ventilation fan of the microparticle diffusion apparatus of 6th Embodiment of this invention. Side surface sectional drawing of the microparticle diffusion apparatus of 7th Embodiment of this invention. The perspective view of the microparticle diffusion apparatus of 8th Embodiment of this invention. Side surface sectional drawing of the microparticle diffusion apparatus of 8th Embodiment of this invention. Side surface sectional drawing of the microparticle diffusion apparatus of 9th Embodiment of this invention

Embodiments of the present invention will be described below with reference to the drawings. 1, 2, and 3 are a perspective view of the microparticle diffusion device of the first embodiment as viewed from above, a perspective view and a front view as viewed from below. The fine particle diffusion device 1 is covered with a housing 2 and is arranged in the vicinity of a corner between one side wall S and a ceiling wall T (see FIG. 4). The housing 2 may be attached to the side wall S, or may be attached to the ceiling wall T in the vicinity of the side wall S.

A suction port 5 opens on the lower surface of the housing 2. A filter 6 is disposed at the suction port 5. A first air outlet 4a, a second air outlet 4b, and a third air outlet 4c are juxtaposed in the horizontal direction on the front upper portion of the housing 2 in order from the right toward the room. The 1st blower outlet 4a, the 2nd blower outlet 4b, and the 3rd blower outlet 4c are provided in the upper end of the housing | casing 2, and send out air along the ceiling wall T (refer FIG. 4). As will be described in detail later, the first air outlet 4a sends air from the housing 2 to the right, the second air outlet 4b sends air from the housing 2 to the front, and the third air outlet 4c is the housing. Air is sent from 2 to the left.

4 and 5 show a side sectional view taken along the line AA and a top sectional view taken along the line BB in FIG. Inside the housing 2, a blower path 10 that connects the first air outlet 4 a, the second air outlet 4 b, the third air outlet 4 c, and the suction port 5 is provided. A blower fan 8 is disposed in the blower path 10. The blower fan 8 is composed of a cross flow fan (cross-flow fan) in which rotating blades (not shown) are rotationally driven by a fan motor 8a, and a rotating shaft is arranged in the horizontal direction. By driving the fan motor 8a, the blower fan 8 takes in air from the circumferential direction of the rotor blade (not shown) and exhausts it in the circumferential direction. You may form the ventilation fan 8 with the centrifugal fan which has arrange | positioned the rotating shaft to the horizontal direction.

A plurality of first divided passages 10a, second divided passages 10b, and third divided passages 10c divided in the horizontal direction on the downstream side of the blower fan 8 are provided in the blower passage 10 in order. The first divided passage 10a, the second divided passage 10b, and the third divided passage 10c have a first outlet 4a, a second outlet 4b, and a third outlet 4c opened at the front ends, respectively. Further, the inner side wall 10e and the outer side wall 10f of the first divided passage 10a and the third divided passage 10c are formed by curved surfaces inclined with respect to the vertical plane.

In the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c, a vertical expansion portion 11 and an axial expansion portion 12 are formed on the downstream side of the blower fan 8, respectively. The vertical expansion unit 11 gradually expands the flow path in the vertical direction of the rotation axis of the blower fan 8. The axially expanding portion 12 gradually expands the flow path in the axial direction of the rotation axis of the blower fan 8 and gradually decreases in the vertical direction on the downstream side of the vertical expanding portion 11.

In addition, the flow path area of the axial direction expansion part 12 is expanded so that it becomes downstream. The first divided passage 10 a, the second divided passage 10 b, and the third divided passage 10 c are formed continuously with the vertical direction enlarged portion 11 and the axial direction enlarged portion 12.

The

electrodes

7a and 7b of the fine particle generator 7 are arranged so as to be exposed in the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c. The electrode 7a and the electrode 7b are respectively partitioned by a partition wall 10d in the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c.

A voltage having an AC waveform or an impulse waveform is applied to the

electrodes

7a and 7b. A positive voltage is applied to the electrode 7a, and ions generated by ionization combine with moisture in the air to form positive cluster ions mainly composed of H ⁺ (H ₂ O) m. A negative voltage is applied to the electrode 7b, and ions generated by ionization combine with moisture in the air to form negatively clustered ions mainly composed of O ₂ ⁻ (H ₂ O) n. Here, m and n are arbitrary natural numbers.

H ⁺ (H ₂ O) m and O ₂ ⁻ (H ₂ O) n aggregate on the surface of airborne bacteria and odorous components and surround them. Then, as shown in the formulas (1) to (3), the active species [.OH] (hydroxyl radical) or H ₂ O ₂ (hydrogen peroxide) is allowed to collide with the surface of floating bacteria, odorous components, etc. Aggregate to break them. Here, m ′ and n ′ are arbitrary natural numbers. Therefore, indoor sterilization and odor removal can be performed by generating positive ions and negative ions and discharging them from the first air outlet 4a, the second air outlet 4b, and the third air outlet 4c.

^{_{H + (H 2 O) m}} + O 2 - (H 2 O) n → · OH + 1 / 2O 2 + (m + n) H 2 O
... (1)
^{_{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ 2 OH + O ₂ + (m + m ′ + n + n ′) H ₂ O (2)
^{_{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ H ₂ O ₂ + O ₂ + (m + m ′ + n + n ′) H ₂ O (3)

In the fine particle diffusion device 1 configured as described above, when the blower fan 8 and the fine particle generator 7 are driven, indoor air is taken into the housing 2 from the suction port 5. The air taken into the housing 2 is collected by the filter 6 and flows through the air blowing path 10 and is guided to the air blowing fan 8.

Exhaust air from the blower fan 8 is branched into a first divided passage 10a, a second divided passage 10b, and a third divided passage 10c, and is led to the first outlet 4a, the second outlet 4b, and the third outlet 4c, respectively. At this time, if the rotation axis of the blower fan 8 is arranged vertically, the air flow becomes uneven in the left-right direction due to centrifugal force. For this reason, the rotational axis of the blower fan 8 can be horizontally arranged to make the airflow in the left-right direction uniform. In addition, since the inner side wall 10e of the first divided passage 10a and the third divided passage 10c is inclined with respect to the vertical plane, the airflow straightly traveling in the circumferential tangential direction from the blower fan 8 can be easily curved.

Further, the flow path is expanded in the vertical direction by the vertical expansion section 11 and the flow path is expanded in the left-right direction by the axial expansion section 12. In the vertical expansion section 11 upstream of the axial expansion section 12, the influence of the centrifugal force of the blower fan 8 exhausted in the circumferential direction is large. For this reason, since the airflow proceeds in a direction perpendicular to the rotation axis of the blower fan 8, it is not desirable to spread it to the left and right. Then, the kinetic energy of the airflow is recovered and converted into a static pressure by expanding the flow path in the vertical direction by the vertical expansion unit 11, and the static pressure is increased. Thereby, the ventilation capability of the microparticle diffusion apparatus 1 can be improved. In addition, the width in the left-right direction of the flow path may be made constant by the vertical enlargement unit 11 or may be slightly reduced. At this time, the flow path area is gradually expanded toward the downstream.

Since the axial expansion section 12 expands the flow path in the left-right direction with the centrifugal force of the blower fan 8 weakened, the airflow can be smoothly curved and expanded in the left-right direction without increasing the pressure loss. Moreover, since the flow path is restricted in the vertical direction, the airflow can be more smoothly spread in the left-right direction, and the speed reduction of the airflow can be suppressed. At this time, since the flow path area of the axially expanded portion 12 increases as it becomes downstream, the kinetic energy can also be recovered and converted into static pressure in the axially expanded portion 12 to increase the static pressure. In addition, the vertical width of the flow path may be maintained constant by the axially enlarged portion 12, or the flow path area may be maintained constant.

The air flow flowing through the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c includes positive ions and negative ions by the microparticle generator 7. Thereby, the airflow containing a positive ion and a negative ion is sent out from the 1st blower outlet 4a, the 2nd blower outlet 4b, and the 3rd blower outlet 4c.

FIG. 6 shows the state of the airflow in the room D sent out from the microparticle diffusion device 1. The first airflow A1 sent to the right from the first outlet 4a flows along the ceiling wall T and descends along the right side wall (first wall surface P1). The second airflow A2 sent forward from the second outlet 4b flows along the ceiling wall T and along the side wall (second wall surface P2) facing the side wall S on which the microparticle diffusion device 1 is arranged. Descent. The third airflow A3 sent to the left from the third outlet 4c flows along the ceiling wall T and descends along the left side wall (third wall surface P3).

The airflow descending the first wall surface P1, the second wall surface P2, and the third wall surface P3 flows through the indoor floor surface F, rises along the side wall S, and returns to the suction port 5 of the microparticle diffusion device 1. Thereby, airflow circulates along each wall surface in a room, and it can spread ions to every corner of a room. In addition, ions gradually diffuse into the living space in the center of the room due to the airflow flowing along the wall surface. Since the first, second, and third airflows A1, A2, and A3 travel along the wall surface due to the Coanda effect, kinetic energy taken away by indoor air is suppressed. Thereby, power consumption can be suppressed and the reach | attainment distance of an airflow can be enlarged.

Note that the polarity of ions generated by the

electrodes

7a and 7b may be switched every predetermined period. That is, positive ions are generated from the electrode 7a and negative ions are generated from the electrode 7b. When a predetermined period elapses, negative ions are generated from the electrode 7a and positive ions are generated from the electrode 7b. When a predetermined time further elapses, positive ions are generated from the electrode 7a and negative ions are generated from the electrode 7b, and this operation is repeated.

Thus, positive ions and negative ions are alternately sent to the left end and the right end of the air flow that is sent to the left and right of the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c. Therefore, positive ions and negative ions can be distributed at a high concentration over a wide range in the left-right direction in the room.

According to the present embodiment, the first air outlet 4a, the second air outlet 4b, and the third air outlet 4c arranged side by side in the horizontal direction are provided, circulate along the ceiling wall T, and descend along the first wall surface P1. The first air flow A1 is sent out from the first air outlet 4a, and the second air flow A2 flowing along the ceiling wall T and descending along the second wall surface P2 facing the side wall S is sent out from the second air outlet. Then, the third air flow A3 that flows along the ceiling wall T and descends along the third wall surface P3 facing the first wall surface P1 is sent out from the third air outlet 4c.

Thereby, since the first, second, and third airflows A1, A2, and A3 proceed along the wall surface by the Coanda effect, the kinetic energy taken away by the indoor air is suppressed. That is, when the airflow does not follow the ceiling wall T, the upper side of the airflow attracts ambient air (air between the ceiling wall T and the airflow), and the surrounding air loses kinetic energy and is damaged. When the airflow is along the ceiling wall T, the kinetic energy is lost due to the frictional resistance of the wall surface, but is generally much smaller than the kinetic energy lost when the airflow does not follow the ceiling wall T. In the conventional air conditioner described in the above-mentioned Patent Document 2, the kinetic energy is deprived by the surrounding air because the air flow is not along the ceiling wall T, and the reach distance of the air flow is shortened accordingly.

For this reason, this embodiment can increase the reach of the air current and spread ions to every corner of the room. Therefore, it is possible to save power, and since airflow is not directly supplied to the living space, user discomfort can be reduced and ions can be sufficiently diffused into the room.

Further, the rotation axis of the blower fan 8 composed of a centrifugal fan or a cross-flow fan is horizontally arranged, and the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c in which the blower passage 10 is divided on the downstream side of the blower fan. Since the inner side wall 10e of the first divided passage 10a and the third divided passage 10c is inclined with respect to the vertical plane, the air flow is made uniform in the left-right direction and the air flow straight in the circumferential tangential direction is easily obtained. Can be curved.

In addition, the vertical expansion unit 11 gradually expands the flow path in the direction perpendicular to the rotation axis of the blower fan 8, and the axial expansion unit 12 moves the flow path downstream of the vertical expansion unit 11 to the rotation axis of the blower fan 8. It gradually expands in the axial direction and gradually decreases in the vertical direction. Thereby, the non-uniformity of the flow rate due to the centrifugal force of the blower fan 8 can be prevented, and the airflow can be spread in the axial direction of the rotation shaft of the blower fan 8.

In addition, since the flow passage area is not restricted by the vertically enlarged portion 11 immediately after the blower fan 8, the kinetic energy of the airflow is sufficiently recovered to increase the static pressure. Then, the axial direction expansion part 12 suppresses the speed reduction of the air current, and the air current is expanded in the axial direction. Thereby, the reach distance of the airflow can be increased without increasing the rotational speed of the blower fan 8. Therefore, power saving and noise reduction of the fine particle diffusion device 1 can be achieved, and ions can be sufficiently diffused into the room.

In addition, in the vertical expansion part 11, the influence of the centrifugal force of the blower fan 8 is large, and even if the width in the left-right direction of the flow path is gradually widened, not only the effect of spreading the airflow to the left and right is lowered, but rather May be reduced. For this reason, the width in the left-right direction of the flow path may be kept constant by the vertical enlargement unit 11 or may be slightly reduced. Moreover, you may maintain the width | variety of the up-down direction of a flow path with the axial direction expansion part 12 constant.

In addition, since the flow path area of the axially expanded portion 12 increases as it becomes downstream, the kinetic energy can also be collected and converted into static pressure in the axially expanded portion 12 to further increase the static pressure. The flow path area may be kept constant by the axially enlarged portion 12. At this time, the recovery of the kinetic energy in the axial expansion portion 12 is reduced, but the static pressure can be increased more than in the conventional case by the recovery of the kinetic energy in the vertical expansion portion 11.

Moreover, since it has a plurality of first divided passages 10a, second divided passages 10b, and third divided passages 10c that are divided in the axial direction of the blower fan 8 continuously from the vertical direction enlarged portion 11 and the axial direction enlarged portion 12, The airflow can flow along the wall surfaces of the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c, and the airflow can be smoothly spread in the axial direction of the blower fan 8.

Further, the rotation axis of the blower fan 8 is horizontally arranged, the casing 2 is arranged in the vicinity of the ceiling wall T in the room, and the first outlet 4a, the second outlet 4b, and the third outlet 4c are connected to the casing 2. The airflow is sent out along the ceiling wall T. Thereby, the airflow sent out along the ceiling wall T distribute | circulates along the ceiling wall T by the Coanda effect. Therefore, the reach distance of the air current can be made longer.

Next, FIG. 7 shows a side sectional view of the microparticle diffusion device of the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals. In the present embodiment, the first air outlet 4 a, the second air outlet 4 b, and the third air outlet 4 c that are horizontally arranged in the same manner as in the first embodiment open in the lower front surface of the housing 2. Further, the suction port 5 opens on the upper surface of the housing 2. Other parts are the same as those in the first embodiment.

The case 2 of the fine particle diffusion device 1 is attached to the one side wall S of the room with a predetermined gap H between the case 2 and the ceiling wall T. The first divided passage 10a, the second divided passage 10b, and the third divided passage 10c (see FIG. 4) are inclined upward by a predetermined angle with respect to the horizontal. Thereby, after the first airflow A1, the second airflow A2, and the third airflow A3 reach the ceiling wall T, they circulate along the ceiling wall T.

1st airflow A1 sent toward the right from the 1st blower outlet 4a distribute | circulates along the ceiling wall T, and falls along the right side wall (1st wall surface P1 (refer FIG. 6)). The second airflow A2 sent forward from the second outlet 4b flows along the ceiling wall T and faces the side wall S on which the microparticle diffusion device 1 is disposed (second wall surface P2 (FIG. 6). D) Follow d). The third airflow A3 sent to the left from the third outlet 4c flows along the ceiling wall T and descends along the left side wall (third wall surface P3 (see FIG. 6)). The airflow descending the first wall surface P1, the second wall surface P2, and the third wall surface P3 flows through the floor F in the room, rises along the side wall S, and the suction port 5 from the side of the microparticle diffusion device 1. Return to.

According to the present embodiment, as in the first embodiment, the first, second, and third airflows A1, A2, and A3 travel along the wall surface by the Coanda effect, so that the kinetic energy taken away by the indoor air is suppressed. Is done. For this reason, the reach | attainment distance of an airflow can be enlarged and ion can be spread to every corner of a room. Therefore, it is possible to save power, and since airflow is not directly supplied to the living space, user discomfort can be reduced and ions can be sufficiently diffused into the room.

Note that the fine particle diffusion device 1 of the first embodiment may be attached to the side wall S with a predetermined gap H from the ceiling wall T. Then, similarly to the present embodiment, the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c are inclined upward by a predetermined angle with respect to the horizontal. Accordingly, the first airflow A1, the second airflow A2, and the third airflow A3 can be distributed along the ceiling wall T after reaching the ceiling wall T.

However, kinetic energy is lost before the first airflow A1, the second airflow A2, and the third airflow A3 reach the ceiling wall T. For this reason, in order to shorten the distance to the ceiling wall T, it is desirable to set the gap H to 30 cm or less, and it is desirable to set the predetermined angle to 20 ° or less so that the airflow smoothly follows the ceiling wall T. Moreover, it is more desirable to form the 1st blower outlet 4a, the 2nd blower outlet 4b, and the 3rd blower outlet 4c along the ceiling wall T like 1st Embodiment.

Next, FIG. 8 shows a side sectional view of the microparticle diffusion device of the third embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals. In the present embodiment, a lower passage 13 that is exhausted downward from the blower fan 8 is provided. Other parts are the same as those in the first embodiment.

In the lower passage 13, a part of the housing of the blower fan 8 extends downward at both ends in the axial direction, and opens the fourth outlet 4 d on the lower surface of the housing 2. The 4th airflow A4 sent out from the 4th blower outlet 4d falls along the side wall S where the microparticle diffusion apparatus 1 is arranged. At this time, the flow rate of the fourth air stream A4 is smaller than the flow rate of the second air stream A2, and is, for example, about 10% of the flow rate of the second air stream A2.

The fourth airflow A4 sent out from the fourth outlet 4d descends along the side wall S. At this time, the flow rate of the fourth air stream A4 is smaller than the flow rate of the second air stream A2, and is, for example, about 10% or less of the flow rate of the second air stream A2. Since the first, second, and third airflows A1, A2, and A3 return to the suction port 5 through the entire room, ions near the side wall S may be insufficient. Therefore, the fourth air flow A4 descends the side wall S to replenish ions in the vicinity of the side wall, and returns to the suction port 5 together with the first, second, and third air currents A1, A2, and A3 that ascend the side wall S.

According to the present embodiment, since the fourth air outlet 4d that sends out the fourth airflow A4 along the side wall S on which the microparticle diffusion device 1 is disposed is provided, ions in the vicinity of the side wall S can be replenished. At this time, the fourth airflow A4 becomes resistance to the first, second, and third airflows A1, A2, and A3 returning to the suction port 5. However, since the flow rate of the fourth airflow A4 is smaller than the flow rate of the second airflow A2, resistance due to the fourth airflow A4 can be suppressed. In addition, you may provide the 4th blower outlet 4d in 2nd Embodiment shown in above-mentioned FIG.

Next, FIG. 9 shows a side sectional view of the microparticle diffusion device of the fourth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals. In the present embodiment, the second divided passage 10b is further branched at the front end. Other parts are the same as those in the first embodiment.

A wedge-shaped partition plate 13 spreading forward is provided at the front end of the second divided passage 10b. Thereby, the 2nd blower outlet 4b is formed above the partition plate 13, and the 4th blower outlet 4d is formed below. The second airflow A2 sent from the second outlet 4b flows in the same manner as in the first embodiment.

4th airflow A4 sent out from the 4th blower outlet 4d is sent out to the front lower direction toward the living space of the central part of a room. At this time, the flow rate of the fourth air stream A4 is smaller than the flow rate of the second air stream A2, and is, for example, about 10% or less of the flow rate of the second air stream A2. The fourth airflow A4 supplements ions in the indoor living space, joins the second airflow A2 on the floor F, and returns to the suction port 5.

According to the present embodiment, since the fourth air outlet 4d that sends out the fourth airflow A4 heading forward and downward is provided, ions in the living space in the center of the room can be replenished. At this time, there is a possibility that the fourth air flow A4 directly hits the user, but since the flow rate of the fourth air flow A4 is smaller than the flow rate of the second air flow A2, the user's discomfort can be suppressed. In addition, you may provide the 4th blower outlet 4d in 2nd Embodiment shown in above-mentioned FIG.

FIG. 10, FIG. 11 and FIG. 12 are a perspective view of the microparticle diffusion device of the fifth embodiment as seen from above, a perspective view and a front view as seen from below. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals.

The fine particle diffusing apparatus 1 is covered with a housing 2 and installed on a side wall S in the vicinity of a corner between one side wall S and a ceiling wall T (see FIG. 4). A predetermined gap H (see FIG. 13) is provided between the housing 2 and the ceiling wall T (see FIG. 13).

A first suction port 5a is opened on the lower surface of the housing 2, and a second suction port 5b is opened on both sides of the upper surface. Filters 6 are disposed in the first suction port 5a and the second suction port 5b, respectively. A first air outlet 4a, a second air outlet 4b, and a third air outlet 4c are juxtaposed in the horizontal direction on the front upper portion of the housing 2 in order from the right toward the room. The 4th blower outlet 4d opens in the both sides of the lower surface of the housing | casing 2. FIG.

The 1st blower outlet 4a, the 2nd blower outlet 4b, and the 3rd blower outlet 4c are provided in the upper end of case 2, and send out the air which flows along ceiling wall T (refer to Drawing 13). As will be described in detail later, the first air outlet 4a sends air from the housing 2 to the right, the second air outlet 4b sends air forward from the housing 2, and the third air outlet 4c is the housing. Air is sent from 2 to the left. Moreover, the 4th blower outlet 4d sends out air toward the downward direction.

13 and 14 show a side sectional view taken along the line DD and a side sectional view taken along the line EE in FIG. A blower fan 30 including a cross flow fan (cross-flow fan) is disposed in the housing 2. The blower fan 30 is formed by covering a crossflow impeller 33 with a first casing 31 and a second casing 32.

The impeller 33 is rotationally driven by a fan motor 33a (see FIG. 10), and the rotation shaft is arranged horizontally. The blower fan 30 draws air from the circumferential direction of the impeller 33 and exhausts it in the circumferential direction by driving the fan motor 33a. The first casing 31 and the second casing 32 are juxtaposed in the axial direction of the impeller 33, and the second casing 32 is disposed on both sides of the first casing 31.

In the housing 2, a first air passage 10 through which air flowing from the first suction port 5a flows and a second air passage 20 through which air flowing from the second suction port 5b circulates are provided. An air flow path on the downstream side of the impeller 33 in the first blower path 10 is formed by the first casing 31, and an air flow path on the downstream side of the impeller 33 in the second blower path 20 is formed by the second casing 32. .

The first casing 31 has a first intake-side opening 31a opened at one end, and an approximately half circumference of the impeller 33 is disposed so as to protrude from the first intake-side opening 31a. A gap between the impeller 33 and the first casing 31 is formed in the minimum in the vicinity of the first intake side opening 31a. The flow passage area on the upstream side of the impeller 33 in the first air blowing path 10 is larger than the first intake side opening 31a. The wall surface of the first casing 31 is curved with a predetermined curvature, and the first air outlet 4a, the second air outlet 4b, and the third air outlet 4c are opened at the tip. Thereby, the 1st ventilation path 10 which connected the 1st blower outlet 4a, the 2nd blower outlet 4b, the 3rd blower outlet 4c, and the 1st suction inlet 5a is formed.

The second casing 32 is provided with a second intake side opening 32a at one end, and approximately half of the circumference of the impeller 33 projects from the second intake side opening 32a. A gap between the impeller 33 and the second casing 32 is formed in the vicinity of the second intake side opening 32a. The flow passage area on the upstream side of the impeller 33 of the second air blowing path 20 is larger than the second intake side opening 32a. The wall surface of the second casing 32 is curved with a predetermined curvature, and the fourth outlet 4d opens at the tip. Thereby, the 2nd ventilation path 20 which connected the 4th blower outlet 4d and the 2nd suction inlet 5b is formed.

Further, the vicinity of the first intake side opening 31a of the first casing 31 is rotationally moved by a predetermined angle θ around the rotation center from the second intake side opening 32a of the second casing 32 when viewed in the axial direction. Matches the shape. Thereby, the opening surface of the first intake side opening 31a and the opening surface of the second intake side opening 32a are arranged at different angles in the circumferential direction.

For this reason, the 1st casing 31 and the 2nd casing 32 are formed in the optimal shape for the ventilation fan 30 which consists of a cross flow fan, and the flow path of the exhaust side of the 1st ventilation path 10 and the 2nd ventilation path 20 is formed. Can do. Thereby, the airflow which distribute | circulates the 1st ventilation path 10 and the 2nd ventilation path 20 is not abruptly bent, but pressure loss can be reduced and ventilation efficiency can be improved, and noise can be reduced.

FIG. 15 is a top sectional view taken along the line CC of FIG. A plurality of first divided passages 10a, second divided passages 10b, and third divided passages 10c divided in the horizontal direction on the downstream side of the blower fan 30 are provided in the first blower passage 10 in order. The first divided passage 10a, the second divided passage 10b, and the third divided passage 10c have a first outlet 4a, a second outlet 4b, and a third outlet 4c opened at the front ends, respectively. Further, the inner side wall 10e and the outer side wall 10f of the first divided passage 10a and the third divided passage 10c are formed by curved surfaces inclined with respect to the vertical plane.

In the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c, a vertical expansion portion 11 and an axial expansion portion 12 (see FIG. 14) are formed on the downstream side of the blower fan 30, respectively. The vertical expansion unit 11 gradually expands the flow path in the vertical direction of the rotation axis of the blower fan 30. The axial enlargement unit 12 gradually expands the flow path in the axial direction of the rotating shaft of the blower fan 30 and gradually reduces in the vertical direction on the downstream side of the vertical expansion unit 11. Further, the axially enlarged portion 12 is inclined upward by a predetermined angle with respect to the horizontal.

The

electrodes

7a and 7b of the microparticle generator 7 similar to the above are exposed and arranged in the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c. The electrode 7a and the electrode 7b are respectively partitioned by a partition wall 10d in the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c. Further, as shown in FIG. 13 described above, the same fine particle generator 7 is also disposed in the second air passage 20 with the

electrodes

7a and 7b exposed.

In the fine particle diffusion device 1 having the above configuration, when the blower fan 30 and the fine particle generation device 7 are driven, indoor air is taken into the housing 2 from the first suction port 5a and the second suction port 5b. The air taken into the housing 2 is collected by the filter 6, flows through the first air passage 10 and the second air passage 20, and is guided to the air fan 30.

The airflow flowing through the second casing 20 of the second air passage 20 is blown out downward and rearward from the fourth outlet 4d. And it flows down along the side wall S to which the microparticle diffusion apparatus 1 is attached.

The airflow flowing through the first casing 31 of the first air passage 10 branches into the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c. And each airflow is guide | induced to the 1st blower outlet 4a, the 2nd blower outlet 4b, and the 3rd blower outlet 4c. At this time, if the rotation axis of the blower fan 30 is arranged vertically, the air flow becomes uneven in the left-right direction due to centrifugal force. For this reason, the rotational axis of the blower fan 30 can be horizontally arranged to make the airflow in the left-right direction uniform. In addition, since the inner side walls 10e of the first divided passage 10a and the third divided passage 10c are inclined with respect to the vertical plane, the airflow straightly traveling in the circumferential tangential direction from the blower fan 30 can be easily curved.

Further, the flow path is expanded in the vertical direction by the vertical expansion section 11 and the flow path is expanded in the left-right direction by the axial expansion section 12. In the vertical expansion section 11 upstream of the axial expansion section 12, the influence of the centrifugal force of the blower fan 30 exhausted in the circumferential direction is large. For this reason, since the airflow proceeds in a direction perpendicular to the rotation axis of the blower fan 30, it is not desirable to spread it to the left and right. By enlarging the flow path in the vertical direction by the vertical enlargement unit 11, the kinetic energy of the airflow is recovered and converted into static pressure, and the static pressure is increased. Thereby, the ventilation capability of the microparticle diffusion apparatus 1 can be improved. In addition, the width in the left-right direction of the flow path may be made constant by the vertical enlargement unit 11 or may be slightly reduced. At this time, the flow path area is gradually expanded toward the downstream.

Since the axial direction expansion section 12 expands the flow path in the left-right direction with the centrifugal force by the blower fan 30 weakened, the airflow can be smoothly curved and expanded in the left-right direction without increasing the pressure loss. Moreover, since the flow path is restricted in the vertical direction, the airflow can be more smoothly spread in the left-right direction, and the speed reduction of the airflow can be suppressed. At this time, since the flow path area of the axially expanded portion 12 increases as it becomes downstream, the kinetic energy can also be recovered and converted into static pressure in the axially expanded portion 12 to increase the static pressure. In addition, the vertical width of the flow path may be maintained constant by the axially enlarged portion 12, or the flow path area may be maintained constant.

The airflow flowing through the first air passage 10 and the second air passage 20 includes positive ions and negative ions by the microparticle generator 7. Thereby, the airflow containing a positive ion and a negative ion is sent out from the 1st blower outlet 4a, the 2nd blower outlet 4b, the 3rd blower outlet 4c, and the 4th blower outlet 4d.

FIG. 16 shows the state of the airflow in the room D sent out from the fine particle diffusion device 1. The first airflow A1 sent to the right from the first outlet 4a flows along the ceiling wall T and descends along the right side wall (first wall surface P1). The second airflow A2 sent forward from the second outlet 4b flows along the ceiling wall T and along the side wall (second wall surface P2) facing the side wall S on which the microparticle diffusion device 1 is arranged. Descent. The third airflow A3 sent to the left from the third outlet 4c flows along the ceiling wall T and descends along the left side wall (third wall surface P3).

4th airflow A4 sent out from the 4th blower outlet 4d falls along the side wall S where the microparticle diffusion apparatus 1 is arranged. At this time, the flow rate of the fourth air stream A4 is smaller than the flow rate of the second air stream A2, and is, for example, about 10% of the flow rate of the second air stream A2.

The airflow descending the first wall surface P1, the second wall surface P2, and the third wall surface P3 flows through the indoor floor surface F, rises along the side wall S, and returns to the first suction port 5a of the microparticle diffusion device 1. In addition, a part of the air in the room returns from above the fine particle diffusion device 1 to the second suction port 5b. Thereby, airflow circulates along each wall surface in a room, and it can spread ions to every corner of a room. In addition, ions gradually diffuse into the living space in the center of the room due to the airflow flowing along the wall surface. Since the first, second, and third airflows A1, A2, and A3 travel along the wall surface due to the Coanda effect, kinetic energy taken away by indoor air is suppressed.

That is, when the airflow does not follow the ceiling wall T, the upper side of the airflow attracts ambient air (air between the ceiling wall T and the airflow), and the surrounding air loses kinetic energy and is damaged. When the airflow is along the ceiling wall T, the kinetic energy is lost due to the frictional resistance of the wall surface, but is generally much smaller than the kinetic energy lost when the airflow does not follow the ceiling wall T. Thereby, power consumption can be suppressed and the reach | attainment distance of an airflow can be enlarged.

Also, since the first, second, and third airflows A1, A2, and A3 return to the first suction port 5a through the entire room, ions near the side wall S may be insufficient. For this reason, 4th airflow A4 can descend | fall the side wall S, and can supplement the ion of the side wall vicinity. At this time, since the flow rate of the fourth airflow A4 is smaller than the flow rate of the second airflow A2, resistance due to the fourth airflow A4 can be suppressed.

Moreover, since the axial direction expansion part 12 of the 1st ventilation path | route 10 inclines upwards only predetermined angle with respect to the horizontal, 1st airflow A1, 2nd airflow A2, and 3rd airflow A3 reached | attained the ceiling wall T. Later, it can be distributed along the ceiling wall T. However, kinetic energy is deprived before the first airflow A1, the second airflow A2, and the third airflow A3 reach the ceiling wall T. For this reason, it is desirable to set the gap H to 30 cm or less in order to shorten the distance to the ceiling wall T, and the inclination angle of the airflow flowing through the axial expansion portion 12 so that the airflow smoothly follows the ceiling wall T. It is desirable to make it 20 degrees or less.

Note that the polarity of ions generated by the

electrodes

According to the present embodiment, the first and

second casings

31 and 32 that cover the impeller 33 of the blower fan 30 are juxtaposed in the axial direction of the impeller 33, and the blowing direction of the airflow that passes through each of them is different. The airflow can be sent out in a plurality of directions. Therefore, ions can be easily distributed to every corner of the room. Further, since the air flow is not bent suddenly, the pressure loss can be prevented from being lowered, and the blowing efficiency can be improved and the noise can be reduced.

The first casing 31 extends at the exhaust side of the impeller 33 by opening the first intake side opening 31a from which the impeller 33 projects at one end, and the second casing 32 is the second intake side from which the impeller 33 projects. The opening 32 a is opened at one end and extends to the exhaust side of the impeller 33. The opening surface of the first intake side opening 31 a and the opening surface of the second intake side opening 32 a are arranged at different angles in the circumferential direction of the impeller 33. Thereby, the 1st,

2nd casings

31 and 32 can be easily formed in the optimal shape with a low pressure loss with respect to the ventilation fan 30. FIG. Moreover, it can form easily so that the blowing direction (front upper direction) of the airflow which passes the 1st casing 31 and the blowing direction (lower direction back) of the airflow which passes the 2nd casing 32 differ by 90 degrees or more.

Further, the first casing 31 within a predetermined range from the first intake side opening 31 a is located at the center of rotation of the impeller 33 when the second casing 32 within the predetermined range from the second intake side opening 32 a is viewed from the axial direction of the impeller 33. Since it coincides with the shape rotated and moved around, the first and

second casings

31 and 32 having optimum shapes can be formed more easily.

In addition, since the first casing 31 sends an air flow into the room forward and upward and the second casing 32 sends the air flow into the room downward, the ions can be easily distributed to every corner of the room. . When the gap H is small, the first casing 31 may blow out the airflow in the horizontal direction.

In addition, since the first casing 31 sends an air flow into the room forward and upward, and the second casing 32 sends the air flow into the room downward, the indoor air can be easily circulated to every corner. . When the gap H is small, the first casing 31 may blow out the airflow in the horizontal direction.

In the first to fifth embodiments, the fine particle generator 7 may be omitted, and a circulator that circulates the airflow in the room using the first, second, third, and fourth airflows A1, A2, A3, and A4. At this time, since the first, second, and third airflows A1, A2, and A3 travel along the wall surface by the Coanda effect, the kinetic energy taken away by the indoor air is suppressed, and the reach of the airflow can be increased. it can. Therefore, it is possible to save power, and since airflow is not directly supplied to the living space, user discomfort can be reduced and indoor air can be circulated sufficiently.

Next, FIGS. 17 and 18 are a perspective view and a side sectional view showing a microparticle diffusion device of a sixth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals. The fine particle diffusion device 1 is covered with a housing 2 formed of a resin molded product. The fine particle diffusion device 1 is an installation surface in which the bottom surface of the housing 2 comes into contact with the indoor floor surface F, and is placed on the floor surface F. The fine particle diffusing device 1 is disposed in the vicinity of a corner between the one side wall S and the floor surface F.

A suction port 5 for taking indoor air into the housing 2 is opened in the lower part of the front surface and the back surface of the housing 2. A first air outlet 43 and a second air outlet 53 that blow out an air flow are opened on an upper surface facing the installation surface of the housing 2. As will be described in detail later, the opening area of the first outlet 43 disposed at the rear is formed smaller than the opening area of the second outlet 53 disposed at the front.

A blower fan 40 is arranged in the housing 2. FIG. 19 is a front sectional view of the blower fan 40. The blower fan 40 includes a motor 9 having a rotation shaft 9a extending in the left-right direction, and a plurality of first and

second impellers

41 and 51 are attached to the rotation shaft 9a. Accordingly, the first and

second impellers

41 and 51 are arranged coaxially and are driven to rotate by the motor 9.

The first impeller 41 has a disc 41a connected to the rotary shaft 9a and a plurality of blades 41b erected radially on both sides of the disc 41a. Similarly, the 2nd impeller 51 has the disc 51a connected with the rotating shaft 9a, and the some blade 51b erected on both surfaces of the disc 51a radially.

The first impeller 41 and the second impeller 51 are respectively disposed in a first casing 42 and a first casing 52 that form an air flow path. Where air flowing into the housing 2 from the suction port 5 (see FIG. 17) flows between the first and

second casings

42 and 52 and the housing 2 and between the first and

second casings

42 and 52. A fixed gap is formed.

The first casing 42 has a first tubular portion 42a and a first outlet passage 42c. The first cylindrical portion 42a is formed in a substantially cylindrical shape covering the first impeller 41, and opens the first intake port 42b on both end surfaces in the axial direction. The first outlet passage 42c extends upward in the circumferential tangential direction from the peripheral surface of the first tubular portion 42a, and opens a first outlet 43 (see FIG. 18) at the tip.

Similarly, the 1st casing 52 has the 2nd cylindrical part 52a and the 2nd blowing passage 52c. The 2nd cylindrical part 52a is formed in the substantially cylindrical shape which covers the 2nd impeller 11, and opens the 2nd inlet port 52b in the both end surfaces of an axial direction. The second outlet passage 52c extends upward in the circumferential tangential direction from the peripheral surface of the second cylindrical portion 52a, and opens the second outlet 53 (see FIG. 18) at the tip.

As a result, the blower fan 40 forms a multiple centrifugal fan (sirocco fan or turbo fan), and the first and

second impellers

41 and 51 rotate in the axial direction from the first and

second intake ports

42b and 52b. Intake and exhaust in the circumferential direction.

As shown in FIG. 18, the first cylindrical portion 42a and the second cylindrical portion 52a are arranged so as to be substantially coincident with each other in a side view. The direction in which the first blowing passage 42c extends from the first tubular portion 42a and the direction in which the second blowing passage 52c extends from the second tubular portion 52a are different in the circumferential direction. Thereby, the direction of the airflow which blows off from the 1st,

2nd blower outlets

43 and 53 differs. That is, the airflow is sent from the first air outlet 43 toward the vertically upper side or slightly rearward rearwardly upward as indicated by the arrow B1, and from the second air outlet 53 toward the upper front side as indicated by the arrow B2. The airflow is sent out.

Also, the first blow-out passage 42c is gradually expanded in a direction perpendicular to the axis of the flow path at the upstream portion 42d immediately after the first cylindrical portion 42a. Further, the downstream portion 42e on the downstream side of the upstream portion 42d gradually reduces the flow path in the direction perpendicular to the axis until reaching the first outlet 43. The second blowing passage 52c is gradually enlarged in the flow path in the direction perpendicular to the axis between the second tubular portion 52a and the second blowing outlet 53. As a result, the width in the direction perpendicular to the axis of the first outlet 43 is smaller than the width in the direction perpendicular to the axis of the second outlet 53, and the opening area of the first outlet 43 is equal to that of the second outlet 53. It is smaller than the opening area.

A plurality of electrodes (not shown) of the microparticle generator 7 similar to the above are exposed and arranged in the first and

second blowing passages

42c and 52c.

In the fine particle diffusion device 1 configured as described above, when the motor 9 of the blower fan 40 and the fine particle generation device 7 are driven, indoor air is taken into the housing 2 from the suction port 5. The air taken into the housing 2 flows into the first and

second casings

42 and 52 through the first and

second intake ports

42b and 52b. The air that has flowed into the first and

second casings

42 and 52 is exhausted in the circumferential direction from the first and second cylindrical portions 12a and 22a, and flows through the first and

second outlet passages

42c and 52c. The air flowing through the first and

second outlet passages

42c and 52c contains ions, and is blown out from the first and

second outlets

43 and 53 in the directions of arrows B1 and B2, respectively.

At this time, since the flow path is expanded in the direction perpendicular to the rotation shaft 9a at the upstream portion 42d of the first outlet passage 42c, the kinetic energy of the airflow is recovered and converted into static pressure, and the static pressure is increased. Thereby, the ventilation capability of the ventilation fan 40 can be improved. Further, since the flow path is narrowed in the direction perpendicular to the rotation shaft 9a at the downstream portion 42e, it is possible to suppress a decrease in the speed of the airflow. Thereby, a high-speed airflow can be blown out from the 1st blower outlet 43 with a small opening area.

Therefore, the air blown vertically upward or rearward upward from the first outlet 43 rises along the side wall S in the vicinity of the microparticle diffusion device 1. And it returns to the microparticle diffusion apparatus 1 through the ceiling wall, the side wall facing the microparticle diffusion apparatus 1 and the floor surface F. In addition, ions gradually diffuse into the living space in the center of the room due to the airflow flowing along the wall surface. Thereby, airflow circulates along each wall surface in a room, and it can spread ions to every corner of a room.

Since the air flow blown out from the first air outlet 43 advances along the wall surface by the Coanda effect, the kinetic energy taken away by the indoor air is suppressed. That is, when the airflow does not follow the wall surface, the wall surface side of the airflow attracts ambient air (air between the wall surface and the airflow), and the surrounding air loses kinetic energy and is damaged. When the airflow is along the wall surface, the kinetic energy is lost due to the frictional resistance of the wall surface, but is generally much smaller than the kinetic energy lost when the airflow does not follow the wall surface. Thereby, power consumption can be suppressed and the reach | attainment distance of an airflow can be enlarged. Note that the width in the direction perpendicular to the rotation axis 9a of the flow path may be kept constant at the downstream portion 42e of the first outlet passage 42c.

Further, the flow path of the second blowing passage 52c is expanded from the second cylindrical portion 52a to the second blowing outlet 53 in a direction perpendicular to the rotation shaft 9a. For this reason, the kinetic energy of airflow is collect | recovered and converted into a static pressure, and a static pressure is raised. Thereby, the ventilation capability of the microparticle diffusion apparatus 1 can be improved more. And a low-speed air current is blown out from the 2nd blower outlet 53 with a large opening area.

The ions are replenished into the living space in the central part of the room by the air blown forward and upward from the second air outlet 53. Moreover, since the airflow blown out from the second air outlet 53 is low speed, it is possible to prevent discomfort caused by the wind hitting the user of the living space.

Note that the polarity of ions generated by each electrode of the microparticle generator 7 may be switched every predetermined period. That is, positive ions are generated from one electrode and negative ions are generated from the other electrode. When a predetermined period elapses, negative ions are generated from one electrode and positive ions are generated from another electrode. Further, when a predetermined period elapses, positive ions are generated from one electrode and negative ions are generated from the other electrode, and this operation is repeated.

This will send positive ions and negative ions alternately to the left and right ends of the airflow. Therefore, positive ions and negative ions can be distributed at a high concentration over a wide range in the left-right direction in the room.

According to the present embodiment, the first and

second impellers

41 and 51 arranged coaxially are driven by one motor 9. And the direction from which the 1st blowing path 42c extends from the surrounding surface of the 1st cylindrical part 42a which covers the 1st impeller 41, and the 2nd blowing path 52c from the surrounding surface of the 2nd cylindrical part 21a which covers the 2nd impeller 51 The direction in which the air flow extends differs from the circumferential direction, and the blow direction (B1) of the airflow blown from the first blower outlet 43 is different from the blow direction (B2) of the airflow blown from the second blower outlet 53. Thereby, airflow can be sent out in a plurality of directions with a simple configuration. Further, since the air flow is not bent suddenly, an increase in pressure loss can be prevented, and the air blowing efficiency can be improved and noise can be reduced.

Also, since the opening area of the first outlet 43 is smaller than the opening area of the second outlet 53, the wind speed of the first outlet 43 can be made larger than the wind speed of the second outlet 53. Thereby, the reach | attainment distance of the airflow which blows off from the 1st blower outlet 43 can be enlarged. In addition, it is possible to prevent the user from feeling uncomfortable when the airflow blown from the second outlet 53 is sent to the indoor living space.

Further, since the width in the direction perpendicular to the axis of the first air outlet 43 is smaller than the width in the direction perpendicular to the axis of the second air outlet 53, the wind speed of the first air outlet 43 can be easily set to the second air outlet 53. It can be larger than the wind speed.

Also, the upstream portion 42d of the first outlet passage 42c gradually expands in the direction perpendicular to the axis of the flow path, and the downstream portion 42e maintains the flow path constant in the direction perpendicular to the axis or is gradually reduced. Thereby, since the flow path area is not throttled in the upstream part 42c immediately after the 1st impeller 41, the kinetic energy of airflow is fully collect | recovered, static pressure can be raised, and ventilation efficiency can be improved. Thereafter, the speed reduction of the airflow is suppressed at the downstream portion 42e, and the airflow is blown out from the first air outlet 43 having an opening area smaller than that of the second air outlet 53. Thereby, the reach | attainment distance of the airflow which blows off from the 1st blower outlet 43 can be enlarged more, without making the rotation speed of the ventilation fan 40 large.

In addition, the second blowing passage 52c is gradually enlarged in the direction perpendicular to the axis of the flow path, and the airflow is blown out from the second blowing outlet 53 having a large opening area. Thereby, the kinetic energy of the airflow can be sufficiently recovered to increase the static pressure and the air blowing efficiency can be improved, and the airflow slower than the first air outlet 43 can be easily blown out from the second air outlet 53. .

Further, the first casing 42 sends out an air flow from the first air outlet 43 vertically upward or rearward upward, and the first casing 52 sends out the air current from the second air outlet 53 toward the upper front. For this reason, when the fine particle diffusion device 1 is installed in the vicinity of a corner between the one side wall S and the floor surface F in the room, the high-speed air flow blown out from the first air outlet 43 causes the side wall S, the ceiling wall, the opposing side wall, Pass through floor F. Accordingly, ions can be sufficiently diffused in the room. In addition, a low-speed air flow is blown out from the second outlet 53 toward the indoor living space, so that ions in the living space can be replenished and user discomfort can be prevented.

The first and

second impellers

41 and 51 have blades 41b and 21b on both sides of the discs 41a and 21a, and the first and

second intake ports

42b and 52b are the first and second cylindrical portions 42a, respectively. , 52a is provided on both surfaces in the axial direction, and thus the blower fan 40 having a small size and a large air volume can be easily realized.

Next, FIG. 20 shows a side sectional view of the fine particle diffusion device 1 of the seventh embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the sixth embodiment shown in FIGS. In the present embodiment, the HEPA filter 60 is provided in the housing 2 so as to face the suction port 5. Other parts are the same as in the sixth embodiment.

The HEPA filter 60 collects air dust flowing into the housing 2 from the suction port 5. Thereby, clean air from which dust has been removed is sent into the room.

According to this embodiment, the same effect as that of the sixth embodiment can be obtained. In addition, even if the HEPA filter 60 having a large pressure loss is provided in the flow path, since the blower fan 40 is constituted by a centrifugal fan having a high static pressure, it is possible to prevent a reduction in the blowing efficiency.

Next, FIGS. 21 and 22 are a perspective view and a side sectional view showing the microparticle diffusion device of the eighth embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the sixth embodiment shown in FIGS. The fine particle diffusion device 1 is covered with a housing 2 formed of a resin molded product. The fine particle diffusion device 1 is an installation surface in which the rear surface of the housing 2 is in contact with one side wall S of the room, and is hung on the side wall S. The fine particle diffusing device 1 is disposed near the corner between the side wall S and the ceiling wall T. A predetermined gap H is provided between the housing 2 and the ceiling wall T.

A suction port 5 for taking indoor air into the housing 2 is opened on the upper surface of the housing 2. A first air outlet 43 and a second air outlet 53 that blow out airflow are opened on the front surface facing the installation surface of the housing 2. The opening area of the 1st blower outlet 43 distribute | arranged to upper part is formed smaller than the opening area of the 2nd blower outlet 53 distribute | arranged to lower part.

A blower fan 40 similar to that shown in FIG. And the 1st blowing path 42c of the 1st casing 42 which covers the 1st impeller 41 extends in the circumferential tangential direction from the surrounding surface of the 1st cylindrical part 42a, and opens the 1st blower outlet 43 at the front-end | tip. The second blowing passage 52c of the second casing 52 covering the second impeller 51 extends in the circumferential tangential direction from the peripheral surface of the second cylindrical portion 52a, and opens the second outlet 53 at the tip.

The first cylindrical portion 42a and the second cylindrical portion 52a are arranged so as to be substantially coincident with each other in a side view. The direction in which the first blowing passage 42c extends from the first tubular portion 42a and the direction in which the second blowing passage 52c extends from the second tubular portion 52a are different in the circumferential direction. Thereby, the direction of the airflow which blows off from the 1st,

2nd blower outlets

43 and 53 differs. That is, the airflow is sent from the first air outlet 43 toward the front or slightly above the horizontal as shown by the arrow B3, and from the second air outlet 53 toward the front and lower as shown by the arrow B4. Airflow is sent out.

Further, the same fine particle generator 7 as described above is disposed in the first and

second blowing passages

42c and 52c.

second casings

42 and 52 through the first and

second intake ports

42b and 52b. The air that has flowed into the first and

second casings

second outlet passages

42c and 52c.

The air flowing through the first blowing passage 42c contains ions, and the kinetic energy of the airflow is recovered and converted into static pressure at the upstream portion 42d, thereby increasing the static pressure. And the speed reduction of an airflow is suppressed by the downstream part 42e, and a high-speed airflow is blown in the direction of arrow B3 from the 1st blower outlet 43 with a small opening area.

The air blown out from the first air outlet 43 horizontally or forward and upward flows along the ceiling wall T. Then, it returns to the fine particle diffusion device 1 through the side wall and the floor surface F facing the fine particle diffusion device 1. In addition, ions gradually diffuse into the living space in the center of the room due to the airflow flowing along the wall surface. Thereby, airflow circulates along each wall surface in a room, and it can spread ions to every corner of a room.

Also, in the second blow-out passage 52c, the air contains ions, and the kinetic energy of the airflow is recovered and converted into a static pressure, thereby increasing the static pressure. Thereby, the ventilation capability of the microparticle diffusion apparatus 1 can be improved more. Then, a low-speed air current is blown out in the direction of arrow B4 from the second outlet 53 having a large opening area.

The ions are replenished to the living space in the central part of the room by the air blown forward and downward from the second outlet 53. Moreover, since the airflow blown out from the second air outlet 53 is low speed, it is possible to prevent discomfort caused by the wind hitting the user of the living space.

According to this embodiment, the same effect as that of the sixth embodiment can be obtained. In addition, the first casing 42 sends an air flow from the first air outlet 43 horizontally or upward to the front, and the first casing 52 sends an air current from the second air outlet 53 to the front and downward. For this reason, when the fine particle diffusion device 1 is installed in the vicinity of the corner between the one side wall S and the ceiling wall T in the room, the high-speed airflow blown from the first air outlet 43 causes the ceiling wall T, the opposite side wall, and the floor surface F Pass through. Accordingly, ions can be sufficiently diffused in the room. In addition, a low-speed air flow is blown out from the second outlet 53 toward the indoor living space, so that ions in the living space can be replenished and user discomfort can be prevented.

Next, FIG. 23 shows a side cross-sectional view of the fine particle diffusion device 1 of the ninth embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the eighth embodiment shown in FIGS. In the present embodiment, the HEPA filter 60 is provided in the housing 2 so as to face the suction port 5. Other parts are the same as in the eighth embodiment.

According to this embodiment, the same effect as that of the eighth embodiment can be obtained. In addition, even if the HEPA filter 60 having a large pressure loss is provided in the flow path, since the blower fan 40 is constituted by a centrifugal fan having a high static pressure, it is possible to prevent a reduction in the blowing efficiency.

In the sixth to ninth embodiments, the fine particle generator 7 may be omitted, and a circulator that circulates the airflow in the room by blowing air from the first and

second outlets

43 and 53 may be used. Thereby, airflow can be blown out in a plurality of directions to sufficiently circulate indoor air. At this time, an increase in pressure loss can be prevented, air blowing efficiency can be improved, and noise can be reduced.

Moreover, since the high-speed air flow blown out from the first air outlet 43 proceeds along the wall surface by the Coanda effect, the kinetic energy taken away by the indoor air is suppressed, and the reach distance of the air flow can be increased. Moreover, the airflow blown out from the second outlet 53 is sent to the living space at a low speed, and the user's discomfort can be prevented.

Further, although the blower fan 40 is constituted by two centrifugal fans, it may be constituted by three or more centrifugal fans. Further, the motor 9 of the blower fan 40 is formed on both shafts having the rotating shaft 9a extending in two directions, but may be formed on one shaft extending in one direction.

Alternatively, the installation surface of the microparticle diffusion device 1 according to the sixth and seventh embodiments may be brought into contact with the side wall S in the room to hang the microparticle diffusion device 1 on the wall. Thereby, the microparticle diffusion device 1 similar to the eighth and ninth embodiments is obtained. Accordingly, it is possible to realize the fine particle diffusing apparatus 1 that circulates indoor air well and diffuses fine particles to every corner of the room in both cases, corresponding to both floor placement and wall hanging.

Further, the fine particle diffusion device 1 may be placed on the floor by bringing the installation surface of the fine particle diffusion device 1 according to the eighth and ninth embodiments into contact with the floor surface. Thereby, the microparticle diffusion apparatus 1 similar to the sixth and seventh embodiments is obtained. Accordingly, it is possible to realize the fine particle diffusing apparatus 1 that circulates indoor air well and diffuses fine particles to every corner of the room in both cases, corresponding to both floor placement and wall hanging.

Further, in the first to ninth embodiments, the microparticle diffusion device 1 sends out positive ions and negative ions generated by the microparticle generator 7 to sterilize the room. The fine particle diffusion device 1 that generates only negative ions by the fine particle generator 7 and obtains an indoor relaxation effect may be used. Alternatively, the fine particle diffusing device 1 that generates a fragrance, a deodorant, an insecticide, a bactericidal agent, or the like by the fine particle generator 7 and performs indoor deodorization, insecticide, sterilization, or the like may be used.

The present invention can be used for a circulator that circulates indoor air. Moreover, according to this invention, it can utilize for the microparticle spreading | diffusion apparatus which sends out microparticles, such as an ion, a fragrance | flavor, a deodorant, an insecticide, and a disinfectant, and diffuses it indoors.

DESCRIPTION OF SYMBOLS 1 Fine particle diffusion apparatus 2 Housing | casing 4a, 43

1st blower outlet

4b, 53 2nd blower outlet 4c 3rd blower outlet 4d 4th blower outlet 5 Suction port 5a 1st suction port 5b 2nd suction port 6 Filter 7

Fine particle Generator

8, 30, 40 Blower fan 10 Blower passage 10a First divided passage 10b Second divided passage 10c Third divided passage 11 Vertically enlarged portion 12 Axial enlarged portion 13 Lower passage 14 Partition plate 20 Second blower route 31 First 1 casing 32 2nd casing 33 impeller 41

first impeller

41a,

51a disc

41b, 51b blade 42 first casing 42a first cylindrical portion 42b first air inlet 42c first outlet passage 42d upstream portion 42e downstream portion 51 2nd impeller 52 2nd casing 52a 2nd cylindrical part 52b 2nd intake 52c the second air passage 60 HEPA filter A1 first airflow A2 second airflow A3 third airflow A4 fourth airflow F floor P1 first wall surface P2 second wall P3 third wall S sidewall T ceiling wall

Claims

A cross-flow type impeller, a first casing and a second casing that cover the impeller to form an air flow path and are juxtaposed in the axial direction of the impeller, and blow out airflow through the first casing An air blowing fan characterized in that the direction and the direction of air flow passing through the second casing are different.
The first casing opens at one end a first intake side opening from which the impeller projects and extends to the exhaust side of the impeller, and the second casing has one end at the second intake side opening from which the impeller projects. And the opening surface of the first intake side opening and the opening surface of the second intake side opening are arranged at different angles in the circumferential direction of the impeller. The blower fan according to claim 1.
The first casing in a predetermined range from the first intake side opening is rotated around the rotation center of the impeller as viewed from the axial direction of the impeller from the second intake side opening. The blower fan according to claim 2, wherein the blower fan matches the shape.
The blower fan according to claim 2, wherein the blowing direction of the airflow passing through the first casing differs from the blowing direction of the airflow passing through the second casing by 90 ° or more.
A first impeller and a second impeller arranged coaxially;
One motor for rotationally driving the first impeller and the second impeller;
A first tubular portion covering the first impeller and opening the first intake port in the axial direction; and a first opening extending from the circumferential surface of the first tubular portion in the circumferential tangential direction and opening the first outlet at the tip. A first casing having an outlet passage;
A second cylindrical part covering the second impeller and opening the second intake port in the axial direction; a second cylindrical part extending in a circumferential tangential direction from the peripheral surface of the second cylindrical part; A second casing having an outlet passage;
The direction in which the first blowing passage extends from the first tubular portion and the direction in which the second blowing passage extends from the second tubular portion are different in the circumferential direction, and the blowing direction of the air flow blown from the first blowing outlet And the blowing direction of the airflow which blows off from a 2nd blower outlet differ.
6. The blower fan according to claim 5, wherein an opening area of the first air outlet is smaller than an opening area of the second air outlet.
The blower fan according to claim 6, wherein the width in the direction perpendicular to the axis of the first outlet is smaller than the width in the direction perpendicular to the axis of the second outlet.
The first blowout passage is gradually expanded in the direction perpendicular to the flow path in the direction perpendicular to the axis, and the flow path is maintained constant or gradually reduced in the direction perpendicular to the axis to the first blowout port downstream of the upstream portion. And a second blowout passage is gradually enlarged in the direction perpendicular to the axis between the second tubular portion and the second blowout opening. The blower fan as described in.
The first impeller and the second impeller have a disk connected to the motor, and blades standing radially on both sides of the disk, and the first intake port and the second intake port are respectively The blower fan according to claim 5, wherein the blower fan is provided on both axial surfaces of the first cylindrical portion and the second cylindrical portion.
In a circulator that is installed on one side wall of a room or a ceiling wall close to one side wall of the room and circulates the air in the room, the circulators are arranged in the horizontal direction in order from the side closest to the first wall surface adjacent to the one side wall in the horizontal direction. A first air outlet, a second air outlet, and a third air outlet that are provided, and a first air stream that flows along the ceiling wall and descends along the first wall surface is sent out from the first air outlet; The second airflow that flows along the second wall surface that flows along the second wall and faces the one side wall is sent out from the second outlet, and flows along the ceiling wall to the third wall surface that faces the first wall surface. The circulator characterized by sending out the 3rd air current which descends along from the 3rd blower outlet.
A blower fan comprising a centrifugal fan or a cross-flow fan, and a blower path in which the blower fan is disposed with the rotation axis horizontal, and the blower path is divided on the downstream side of the blower fan to form a first outlet, The second blower outlet and the third blower outlet each have a first divided passage, a second divided passage, and a third divided passage that open to the front end, and the inner wall surfaces of the first divided passage and the third divided passage are vertical surfaces. The circulator according to claim 10, wherein the circulator is inclined with respect to the circulator.
The circulator according to claim 10, further comprising a fourth outlet for sending downward the fourth airflow flowing along the one side wall.
The circulator according to claim 10, further comprising a fourth blow-out port that sends out a fourth air flow directed forward and downward, wherein a flow rate of the fourth air flow is smaller than a flow rate of the second air flow.
A housing that opens the suction port and the air outlet, an air passage that is connected to the air inlet and the air outlet, and is provided in the housing, and an air that is arranged in the air passage and sends out an airflow in the circumferential direction And a circulator that circulates indoor air from the air outlet and circulates the indoor air flowing into the air flow path from the suction port, wherein the air flow path is a flow path downstream of the air blower fan. A vertical expansion portion that gradually expands in the vertical direction of the rotation axis of the blower fan, and a flow path that gradually expands in the axial direction of the rotation shaft on the downstream side of the vertical expansion portion and that in the vertical direction of the rotation shaft A circulator having an axially enlarged portion that is maintained constant or gradually reduced.
The circulator according to claim 14, wherein the flow path area of the axially enlarged portion is enlarged as it goes downstream.
The circulator according to claim 14, further comprising a plurality of divided passages that are divided in the axial direction of the rotary shaft in succession to the vertical enlarged portion and the axial enlarged portion.
The casing is disposed in the vicinity of an indoor ceiling wall with the rotating shaft horizontally, and the air outlet is formed at the upper end of the casing and airflow is sent from the outlet along the ceiling wall. The circulator according to claim 14.
The casing is disposed in the vicinity of an indoor ceiling wall with the rotating shaft horizontally, and the air outlet is formed in the lower part of the casing and airflow is sent upward from the air outlet. The circulator according to claim 14.
A circulator comprising the blower fan according to claim 1, wherein air is circulated in a plurality of directions toward the room to circulate the room air.
21. The circulator according to claim 19, wherein the first casing sends the airflow into the room horizontally or forward and upward, and the second casing sends the airflow downward into the room.
A circulator characterized in that the blower fan according to claim 5 is provided in a housing, and air is circulated in a plurality of directions toward the room to circulate the air in the room.
The air current is sent from the first air outlet vertically upward or rearward upward by the first casing, and the air current is sent from the second air outlet toward the front upper direction by the second casing. Circulators.
The air flow is sent out from the first air outlet horizontally or forward and upward by the first casing, and the air current is sent out indoors from the second air outlet toward the front and lower by the second casing. The circulator described.
A first air outlet and a second air outlet are provided on one surface of the housing, and the installation surface facing the one surface can be in contact with the indoor floor surface and installed on the floor surface. The circulator according to claim 22 or 23, wherein the circulator can be installed on a side wall in contact with the circulator.
The circulator according to claim 21, further comprising a HEPA filter that collects dust of air flowing into the first casing and the second casing.
In a microparticle diffusion device that has a microparticle generator for generating microparticles and is installed on one side wall of a room or a ceiling wall close to one side wall of a room and sends out microparticles into the room, A first blower outlet, a second blower outlet, and a third blower outlet arranged in the horizontal direction in order from the side closest to the first wall surface adjacent in the horizontal direction are provided and circulate along the ceiling wall along the first wall surface. The first airflow descending from the first air outlet is sent out from the first air outlet, and the second air current flowing along the ceiling wall and descending along the second wall facing the one side wall is sent out from the second air outlet, A fine particle diffusing apparatus, characterized in that a third air stream flowing along a wall and descending along a third wall surface facing the first wall surface is sent out from a third air outlet.
A housing that opens the suction port and the air outlet, an air passage that is connected to the air inlet and the air outlet, and is provided in the housing, and an air that is arranged in the air passage and sends out an airflow in the circumferential direction A fan and a fine particle generator arranged on the downstream side of the blower fan to generate fine particles, and the fine air contained in the indoor air flowing into the blower passage from the suction port is sent out from the outlet In the fine particle diffusing apparatus, the air flow path is formed on the downstream side of the blower fan, and the flow passage is gradually enlarged in the vertical direction of the rotation axis of the blower fan, and on the downstream side of the vertical enlargement unit. A fine particle diffusing apparatus, comprising: an axially expanding portion that gradually expands the flow path in the axial direction of the rotating shaft and maintains constant in the vertical direction of the rotating shaft or gradually decreases.
A blower fan according to claim 1 and a microparticle generator for generating microparticles, wherein the microparticles are diffused into the room by sending an air flow containing microparticles in a plurality of directions toward the room. A fine particle diffusion device.
29. The microparticle diffusion device according to claim 28, wherein an air flow is sent into the room horizontally or upward by the first casing, and an air stream is sent out indoors by the second casing downward.
A microparticle generator for generating microparticles is provided in the circulator according to claim 21, and the microparticles are diffused into the room by sending an air flow including microparticles in a plurality of directions toward the room. Particle diffusion device.
The fine particles according to any one of claims 27 to 30, wherein the fine particles generated by the fine particle generator include any one of ions, fragrances, deodorants, insecticides, and bactericides. Diffuser.
In an air circulation method in which indoor air is circulated by a circulator installed in the vicinity of a corner between one side wall and a ceiling wall of the room, the circulator is horizontally arranged in order from the side closer to the first wall surface adjacent to the one side wall in the horizontal direction. A first air outlet, a second air outlet, and a third air outlet that are arranged side by side in the direction are provided, and a first air stream that flows along the ceiling wall and descends along the first wall surface is sent out from the first air outlet. The second air stream that flows along the ceiling wall and descends along the second wall surface facing the one side wall is sent out from the second outlet, and flows along the ceiling wall and faces the first wall surface. 3. A method of circulating air, wherein a third airflow descending along the three wall surfaces is sent out from a third outlet.