JP2015152005A - Fanless electric fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fanless electric fan capable of feeding air by increasing a flow speed and a flow rate even if the fan is simply configured.SOLUTION: There is provided a drive air-blowing part having a blowout port part 20 and a suction port part, inner air AI sucked at the suction port part is blown out of a blowout port 31 of the blowout port part and mixture air AM containing inner air and auxiliary air is fed out while entraining it. The blowout port part comprises a housing 22 extending from the drive air-blowing part. The housing has a rear side outer air flowing-in port 36 and a front side auxiliary air, i.e. outer air flowing-out port 37 and also has a communication passage 35 with a shape gradually narrowing on the flowing-out port side. On both sides of the flowing-out port, are provided with blowout ports. The communication passage and the blowout port are extended along an axial direction of the housing up to a part near a ceiling wall at the extremity end of the housing and arranged there.

Description

  The present invention relates to a fanless fan configured without exposing rotary blades for supplying air to the outer surface side.

  Conventionally, a fanless fan has been configured to include a blowing port portion having an air blowing port and a driving air blowing unit having an air suction port portion so that air can be supplied to the blowing port portion. (For example, refer to Patent Documents 1 and 2). Then, the internal air sucked in at the suction port is blown out from the linear blower port extending in the vertical direction of the blow-out port unit, or is blown out from the annular blow-out port of the blow-out port unit, The external air is used as auxiliary air, and the mixed air of the internal air and auxiliary air is supplied while entrained.

JP2013-142331A JP 2010-138906 A

  However, in the fanless fan disclosed in Patent Document 1, internal air is blown out from a single slit-like blowout port extending in the vertical direction, and external air on both the left and right sides of the blowout port is engulfed as auxiliary air to be fed forward. Since the surrounding area of the external air to be entrained is a large open space, it is difficult to entrain the auxiliary air by increasing the flow velocity, and the air flow is improved by increasing the flow rate and flow velocity. There was room.

  Similarly, in the fanless fan of Patent Document 2, the center side of the ring-shaped blowout port is a region of external air to be entrained, but the opening is large and the blowout port faces the front side. In combination with the large space on the center side, there is room for improvement in terms of increasing the flow velocity and entraining external air.

  The present invention solves the above-described problems, and an object of the present invention is to provide a fanless fan that can supply air with an increased flow rate and flow rate even with a simple configuration.

A fanless fan according to the present invention includes an air outlet part provided with an air outlet,
A driving air blowing unit having an air suction port so that air can be supplied to the air blowing port,
The internal air sucked in at the suction port is blown out from the blow-out port of the blow-out port, and the mixed air of the internal air and the auxiliary air is entrained using external air around the blow-out port as auxiliary air. A fanless fan configured to supply,
The outlet portion includes a columnar housing extending from a connecting portion with the driving air blowing portion,
As a cross section in the direction perpendicular to the axis of the housing,
The external air inflow opening provided on the back side of the housing and serving as the auxiliary air, and the external air outflow opening provided on the front side of the housing and serving as the auxiliary air are provided. And a communication passage having a shape gradually narrowing toward the outflow opening side,
The blowout opening is provided on both sides of the outflow opening,
The communication path having the inflow opening and the outflow opening, and the blowout port extend from the connection portion to the vicinity of the ceiling wall portion at the front end of the housing along the axial direction of the housing. It is characterized by being arranged.

  In the fanless fan according to the present invention, the driving air blower is activated, and the internal air sucked from the suction port is supplied to the blower port and blown out from the blower port. Since the air outlets are opened on both sides of the outflow opening, the mixed air in which the auxiliary air composed of the internal air and the external air is mixed while the external air is drawn in from the inflow opening side of the communication path. It will be fed to the front side.

  At that time, since the communication path for entraining the external air is gradually narrowed from the inflow opening to the outflow opening, the entrained external air is blown out from the outflow opening at an increased flow velocity, and as a result, the external air further entrained. This increases the flow rate of the mixed air of the internal air and the auxiliary air composed of the external air, and the mixed air is fed to the front side.

  And, such an operational effect can be achieved by simply forming the shape from the inflow opening to the outflow opening in the communication passage in which the external air is engulfed into a tapered shape, and disposing the outlets on both sides of the outflow opening. This can be achieved with a simple configuration.

  Therefore, the fanless fan according to the present invention can supply air with an increased flow rate and flow rate, even if it is simply configured.

And the fanless electric fan which concerns on this invention is as a cross section of the axial orthogonal direction of the said housing,
The both side walls on the inner peripheral side of the communication path are inclined wall portions that approach each other from the inflow opening side to the outflow opening side, and parallel wall portions that are parallel to each other at the end portion on the outflow opening side And comprising
The parts of the outlets on both sides of the communication path are respectively
A storage chamber for storing the internal air from the suction port portion is provided between both side walls of the communication path on the inner peripheral side of the housing,
A gap is provided between the parallel wall portion and an inner wall portion extending inward from the outer peripheral side of the housing as being parallel to the parallel wall portion,
It is desirable that the outlet is provided between the parallel wall portion and the inner wall portion.

  In such a configuration, the parallel air portion and the inner wall portion on the outflow opening side that are parallel to each other allow the internal air and the auxiliary air entrained by the external air to easily flow in parallel, while crossing each other. Since the flow to the side can be suppressed, the decrease in the flow rate can be suppressed and the mixed air can be fed to the front side.

  Furthermore, in the fanless fan according to the present invention, it is desirable that an opening width dimension between the parallel wall portions facing each other in the outflow opening is set in a range of 4 to 12 mm.

  In such a configuration, since the opening width dimension of the outflow opening is not as narrow as less than 4 mm, it is easy to ensure the flow rate of the mixed air, and since it is not large so as to exceed 12 mm, the flow velocity of the mixed air is reduced. It can suppress, and it can comprise simply, without causing the enlargement of a drive ventilation part.

Furthermore, in the fanless fan according to the present invention, the inner wall portion has a tip portion protruding inward of the housing from an intersection of the parallel wall portion and the inclined wall portion in the side wall of the communication path. Close to the shaft center side of the housing,
Each of the opposing parallel wall portions is arranged such that a tip portion away from the inclined wall portion is disposed closer to the axial center side of the housing than a base portion on the outer peripheral side of the housing in the inner wall portion. desirable.

  In such a configuration, the front end portion of the parallel wall portion is disposed on the inner side of the housing than the inner wall portion, so that the external air can be smoothly involved by the internal air. Further, since the internal air is guided by the inner wall portion that extends to the front side with a length longer than the parallel wall portion, the reduction of the speed toward the front is suppressed, and the air is blown out smoothly from the outlet. It is possible to wind the external air forward.

It is a perspective view of the fanless electric fan of one embodiment concerning the present invention. It is a schematic cross-sectional view of the fanless fan of the embodiment. It is a schematic longitudinal cross-sectional view along the left-right direction of the fanless fan of embodiment. It is a schematic longitudinal cross-sectional view along the front-back direction of the fanless fan of embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, a fanless fan 10 according to an embodiment includes a driving fan unit 11 having a substantially truncated cone shape on the lower side and a driving fan. The air outlet portion 20 is provided on the upper portion of the portion 11 and includes air outlets 31 (31L, 31R) for airflow. The outlet 20 is configured by providing a substantially cylindrical housing 22.

  The drive air blower unit 11 is configured by disposing a drive fan 12 that is rotationally driven by a predetermined drive motor. When the drive fan 12 is operated, the drive air blower unit 11 sucks ambient air A from the suction port 13 on the back side. , And fed to the upper branch 18 side. The drive fan 12 is connected to a power cord (not shown) connected to a predetermined commercial power source, and is turned ON / OFF by operating a switch (not shown) on the operation unit 16 on the front side.

  A filter 14 is disposed in the suction port 13.

  The branching portion 18 is disposed in the connecting portion 17 between the driving air blowing portion 11 and the housing 22 and has a triangular prism shape. The air A supplied from the drive air blower 11 is branched into the left and right sides at the branching part 18 as the internal air AI, and is supplied to the left and right storage chambers 30 (30L, 30R) on the outlet part 20 side. .

  As shown in FIG. 2, the housing 22 of the air outlet 20 includes a communication passage 35 and storage chambers 30 </ b> L and 30 </ b> R connected to the air outlets 31 </ b> L and 31 </ b> R, as shown in FIG. 2. The In the housing 22, the cross-sectional shape in the direction perpendicular to the axis of the housing 22 is a left-right symmetric shape in the arrangement portion of the communication passage 35 and the storage chambers 30 </ b> L and 30 </ b> R.

  The communication path 35 is provided on the back side of the housing 22 and is provided with an opening 36 for the external air AO that serves as the auxiliary air AS, and the outflow of the external air AO that is provided on the front side of the housing 22 and serves as the auxiliary air AS. And has a shape that gradually narrows toward the outflow opening 37 side. That is, both side walls 40 (40L, 40R) on the inner peripheral side of the communication path 35 are provided with inclined wall portions 41 (41L, 41R) that approach each other from the inflow opening 36 side to the outflow opening 37 side. Furthermore, the side walls 40L and 40R are configured to include parallel wall portions 42 (42L and 42R) that are parallel to each other at the end portion on the outflow opening 37 side.

  The storage chambers 30 </ b> L and 30 </ b> R are rooms for storing the internal air AI from the suction port 13, and are disposed between both side walls 40 </ b> L and 40 </ b> R of the communication path 35 on the inner peripheral side of the housing 22. That is, the arcuate storage chamber 30L is provided between the left curved portion 25 and the side wall 40L of the substantially half split cylindrical shape in the outer peripheral wall portion 24 of the housing 22 and between the right curved portion 26 and the side wall 40R. , 30R are disposed.

  Outlet openings 31L and 31R are disposed on both sides of the outflow opening 37 on the front side of the storage chambers 30L and 30R.

  The communication passage 35 having the inflow opening 36 and the outflow opening 37, and the outlets 31L and 31R, together with the storage chambers 30L and 30R, from the connecting portion 17 along the axial direction CD of the housing 22, The housing 22 is disposed so as to extend to the vicinity of the disk-shaped ceiling wall 23 at the tip of the housing 22.

  The outlets 31 (31L, 31R) on the left and right sides of the outflow opening 37 on the front side of the storage chambers 30L, 30R are parallel to the parallel wall portions 42L, 42R and the inner wall portions 28 (28L, 28R), respectively. Between them. The inner wall portions 28L, 28R are spaced from the parallel wall portions 42L, 42R and the front side of the left curved portion 25 and the right curved portion 26 on the outer peripheral side of the housing 22 so as to be parallel to the parallel wall portions 42L, 42R. It arrange | positions so that it may extend inward from the edge of a side.

  Further, the inner side wall portions 28L and 28R respectively have a tip portion 28a projecting inward of the housing 22 at the intersection between the parallel wall portions 42L and 42R and the inclined wall portions 41L and 41R on the side walls 40L and 40R of the communication passage 35. 43, the housing 22 is disposed closer to the axial center C side.

  Further, the opposing parallel wall portions 42L and 42R are arranged such that the distal end portion 42a that is separated from the inclined wall portions 41L and 41R has an axial center of the housing 22 from the base portion 28b on the outer peripheral side of the housing 22 in the inner wall portions 28L and 28R. It is arranged close to the C side. The pull-in amount P from the base portion 28b of the inner wall portion 28 to the axis C side at the distal end portion 42a of the parallel wall portion 42 is preferably in the range of 1 to 4 mm, and in the embodiment, it is 2 mm.

  In addition, the opening width dimension W between the parallel wall portions 42L and 42R facing each other in the outflow opening is within a range of 4 to 12 mm in order to secure a flow rate and a flow velocity of the auxiliary air AS including the stable external air AO. Is desirable, and in the case of the embodiment, it is set to 6 mm.

  In order to secure a stable flow rate and flow velocity of the internal air AI, it is desirable that the inner wall portions 28L and 28R have a gap h1 between the parallel wall portions 42L and 42R within a range of 1 to 5 mm. In the case of the embodiment, it is desirable that the distance is 2.5 mm, and the gap h2 between the inclined wall portions 41L and 41R is in the range of 1 to 4 mm. In the case of the embodiment, the gap h2 is 1.5 mm.

  Furthermore, the mutual angle θ between the inclined wall portions 41L and 41R is preferably within a range of 30 to 50 ° in order to secure stable entrainment (retraction) of the external air AO, and is 40 ° in the embodiment.

  Furthermore, in the case of the embodiment, the length dimension L1 of the inner wall portions 28L and 28R is 10 mm, and the length dimension L2 of the parallel wall portions 42L and 42R is 5 mm.

  In the case of the embodiment, the height dimension H0 is 800 mm, and the diameter dimension D0 of the housing 22 is 100 mm.

  In the fanless fan 10 according to the embodiment, when a predetermined switch of the operation unit 16 is turned on, the drive fan 12 of the drive blower unit 11 is activated, and the internal air AI sucked from the suction port 13 is blown out. It is fed to the section 20 and blown out from the blowout ports 31L and 31R. Since the blowout ports 31L and 31R are opened on both sides of the outflow opening 37, the auxiliary air made up of the internal air AI and the external air AO while entraining the external air AO from the inflow opening 36 side of the communication path 35. The mixed air AM mixed with the air AS is fed to the front side.

  At that time, since the communication passage 35 into which the external air AO is entrained has a shape that gradually narrows from the inflow opening 36 to the outflow opening 37, the entrained external air AO is blown out from the outflow opening 37 with an increased flow velocity. As a result, the amount of external air AO to be entrained also increases, and the flow rate and flow rate of the entire mixed air AM of the internal air AI and the auxiliary air AS composed of the external air AO are increased, so that the mixed air AM is fed forward. Will be.

  Such an effect is obtained by simply forming the shape from the inflow opening 36 to the outflow opening 37 in the communication passage 35 into which the external air AO is entrained into a tapered shape, and the outlets on both sides of the outflow opening 37. It is only necessary to arrange 31L and 31R, and this can be achieved with a simple configuration.

  Therefore, even if the fanless fan 10 of the embodiment is simply configured, it can supply air with an increased flow rate and flow rate.

  In the fanless fan 10 of the embodiment, the mixed air AM can be supplied at a flow rate that is approximately 16 times the flow rate of the air A that is used alone by the drive fan 12. The reach was able to be extended 1.5 times.

  In the embodiment, as the cross section of the housing 22 in the direction orthogonal to the axis, the inclined wall portions 40L and 40R on the inner peripheral side of the communication passage 35 approach each other from the inflow opening 36 side to the outflow opening 37 side. 41 and parallel wall portions 42L and 42R that are parallel to each other at the end portion on the outflow opening 37 side. Furthermore, the internal air AI from the suction inlet 13 is stored between the portions of the outlet 20 on both sides of the communication passage 35 and both side walls 40 </ b> L and 40 </ b> R of the communication passage 35 on the inner peripheral side of the housing 22. Storage chambers 30L, 30R to be provided, parallel wall portions 42L, 42R and gaps h1 are provided, and inner wall portions 28L, 28R extending inward from the outer peripheral side of the housing 22 in parallel with the parallel wall portions 42L, 42R are provided, The outlets 31L and 31R are provided between the parallel wall portions 42L and 42R and the inner wall portions 28L and 28R.

  Therefore, in the embodiment, the parallel air portions 42L and 42R and the inner wall portions 28L and 28R parallel to each other on the outflow opening 37 side cause the internal air AI and the auxiliary air AS including the external air AO to be parallel to each other. Since it is easy to flow, it is possible to suppress the flow to the front side while crossing each other, and thus it is possible to supply the mixed air AM to the front side while suppressing a decrease in the flow velocity.

  Furthermore, in the embodiment, the opening width dimension W between the parallel wall portions 42L and 42R facing each other in the outflow opening 37 is set to 6 mm within the range of 4 to 12 mm.

  Therefore, in the fanless fan 10 of the embodiment, since the opening width dimension W of the outflow opening 37 is not as narrow as less than 4 mm, it is easy to ensure the flow rate of the mixed air AM and is not so large as to exceed 12 mm. Therefore, a decrease in the flow rate of the mixed air AM can be suppressed, and the drive air blower 11 can be simply configured without causing an increase in size.

  Furthermore, in the embodiment, the inner wall portions 28L and 28R are formed so that the tip end portion 28a protruding inside the housing 22 is formed between the parallel wall portions 42L and 42R and the inclined wall portions 41L and 41R in the side walls 40L and 40R of the communication path 35. The intersection 43 is disposed closer to the axis C side of the housing 22. Further, the opposite parallel wall portions 42L and 42R are arranged so that the distal end portion 42a away from the inclined wall portions 41L and 41R has the axial center of the housing 22 from the base portion 28b on the outer peripheral side of the housing 22 in the inner wall portions 28L and 28R. It is arranged close to the C side.

  Therefore, in the embodiment, the front end portion 42a of the parallel wall portions 42L and 42R is disposed inside the housing 22 with respect to the inner wall portions 28L and 28R, so that the external air AO can be smoothly involved by the internal air AI. Can do. Further, since the internal air AI is guided by the inner side wall portions 28L and 28R that are longer than the parallel wall portions 42L and 42R and extend to the front side, the reduction of the speed toward the front is suppressed, and the blowout is performed. It is blown out from the ports 31L and 31R, and can smoothly wind the external air AO forward.

  In the embodiment, the operation of driving ON and driving OFF of the driving fan 12 has been exemplified. However, the rotational speed of the fan can be adjusted, and the air volume can be adjusted, or a timer function can be appropriately provided. The operation may be performed for a predetermined time. Furthermore, the fanless fan 10 may be provided with a swing mechanism by installing the driving air blower 11 on a rotating base so that the direction of the outlets 31L and 31R can be changed. Furthermore, a heating device that can be electrically turned on / off using a heater wire or the like is built in the driving air blower 11 so as to generate a heated internal air AI, and the fanless fan of the present invention is used as a heater. You may comprise so that it can utilize.

DESCRIPTION OF SYMBOLS 10 ... Fanless fan, 11 ... Drive fan part, 12 ... Drive fan, 13 ... Suction inlet part, 17 ... Connection part, 20 ... Outlet part, 22 ... Housing, 23 ... Ceiling wall part, 28 (28L, 28R) ... inner wall part, 28a ... tip part, 28b ... original part, 30 (30L, 30R) ... storage chamber, 31 (31L, 31R) ... outlet, 35 ... communication passage, 36 ... opening for inflow, 37 ... for outflow Opening, 40 (40L, 40R) ... side wall, 41 (41L, 41R) ... inclined wall part, 42 (42L, 42R) ... parallel wall part, 42a ... tip part, 43 ... crossing part,
C: axial center of (housing 22), CD: axial direction of (housing 22), W: opening width dimension (outflow opening 37), h1: gap (between inner wall portion 28 and parallel wall portion 42),
A ... Air, AI ... Internal air, AO ... External air, AS ... Auxiliary air, AM ... Mixed air.

Claims (4)

An air outlet part with an air outlet;
A driving air blowing unit having an air suction port so that air can be supplied to the air blowing port,
The internal air sucked in at the suction port is blown out from the blow-out port of the blow-out port, and the mixed air of the internal air and the auxiliary air is entrained using external air around the blow-out port as auxiliary air. A fanless fan configured to supply,
The outlet portion includes a columnar housing extending from a connecting portion with the driving air blowing portion,
As a cross section in the direction perpendicular to the axis of the housing,
The external air inflow opening provided on the back side of the housing and serving as the auxiliary air, and the external air outflow opening provided on the front side of the housing and serving as the auxiliary air are provided. And a communication passage having a shape gradually narrowing toward the outflow opening side,
The blowout opening is provided on both sides of the outflow opening,
The communication path having the inflow opening and the outflow opening, and the blowout port extend from the connection portion to the vicinity of the ceiling wall portion at the front end of the housing along the axial direction of the housing. A fanless fan characterized by being installed and arranged. As a cross section in the direction perpendicular to the axis of the housing,
The both side walls on the inner peripheral side of the communication path are inclined wall portions that approach each other from the inflow opening side to the outflow opening side, and parallel wall portions that are parallel to each other at the end portion on the outflow opening side And comprising
The parts of the outlets on both sides of the communication path are respectively
A storage chamber for storing the internal air from the suction port portion is provided between both side walls of the communication path on the inner peripheral side of the housing,
A gap is provided between the parallel wall portion and an inner wall portion extending inward from the outer peripheral side of the housing as being parallel to the parallel wall portion,
The fanless fan according to claim 1, wherein the blowout port is provided between the parallel wall portion and the inner wall portion.   3. The fanless fan according to claim 2, wherein an opening width dimension between the parallel wall portions facing each other in the outflow opening is set in a range of 4 to 12 mm. The inner wall portion has a tip portion protruding inward of the housing, arranged closer to the axial center side of the housing than the intersection of the parallel wall portion and the inclined wall portion in the side wall of the communication path. Let
The opposing parallel wall portions are arranged such that the distal end portions that are separated from the inclined wall portions are closer to the axial center side of the housing than the base portion on the outer peripheral side of the housing in the inner wall portion. The fanless fan according to claim 2 or 3, wherein the fanless fan is provided.

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