WO2019234793A1 - 送風機及び冷凍サイクル装置 - Google Patents
送風機及び冷凍サイクル装置 Download PDFInfo
- Publication number
- WO2019234793A1 WO2019234793A1 PCT/JP2018/021367 JP2018021367W WO2019234793A1 WO 2019234793 A1 WO2019234793 A1 WO 2019234793A1 JP 2018021367 W JP2018021367 W JP 2018021367W WO 2019234793 A1 WO2019234793 A1 WO 2019234793A1
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- WO
- WIPO (PCT)
- Prior art keywords
- point
- straight line
- blower
- propeller fan
- virtual straight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/002—Axial flow fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
- F04D29/544—Blade shapes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/545—Ducts
- F04D29/547—Ducts having a special shape in order to influence fluid flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/40—Vibration or noise prevention at outdoor units
Definitions
- the present invention relates to a blower provided with a fan grill and a refrigeration cycle apparatus provided with the blower.
- a blower equipped with a propeller fan and a bell mouth has been proposed as a blower mounted on a refrigeration cycle apparatus or the like.
- the bell mouth is a part that surrounds the outer peripheral side of the propeller fan and constitutes an air passage.
- the blower provided with the propeller fan and the bell mouth may be provided with a fan grill on the downstream side of the bell mouth outlet in the airflow direction generated by the propeller fan.
- the fan grill is a component that covers the propeller fan and the bell mouth air outlets so that a human finger does not come into contact with the propeller fan.
- the fan grill is a component that prevents a human finger from coming into contact with the propeller fan.
- the fan grill is configured by arranging a plurality of crossings at intervals at which human fingers do not enter. For this reason, the fan grill tends to increase the ventilation resistance and the turbulence of the airflow.
- the fan grill of the blower described in Patent Document 1 includes a plurality of horizontal rails.
- the cross-sectional shape perpendicular to the longitudinal direction of each of the horizontal rails is such that the width in the direction from the upstream end to the downstream end is longer than the width in the direction perpendicular to the direction. That is, the cross-sectional shape perpendicular to the longitudinal direction of each of the cross rails is an elongated shape in the direction from the upstream end to the downstream end.
- each of the cross rail is twisted so that it may become the opposite inclination by the one end side and other end side of a longitudinal direction.
- each of the horizontal rails is twisted at the same angle.
- the airflow blown from the propeller fan is a swirling flow.
- each cross rail by configuring each cross rail as in Patent Document 1, the direction from the upstream end to the downstream end is aligned with the direction of the airflow blown from the propeller fan. Can be done. That is, according to Patent Document 1, by configuring each cross rail as in Patent Document 1, it is possible to reduce ventilation resistance and airflow turbulence, and to reduce noise and energy loss that occur when the blower is driven. It has become.
- the direction of the airflow blown from the propeller fan that is, the inclination of the swirling flow with respect to the rotation axis of the propeller fan is influenced by the shape of the bell mouth in addition to the blade shape of the propeller fan.
- the bell mouth outlet is circular, that is, when the bell mouth outlet is axisymmetric about the rotation axis of the propeller fan
- the degree of inclination of the swirling flow with respect to the rotation axis of the propeller fan Is constant.
- the distance between the edge of the bell mouth outlet and the rotation axis of the propeller fan is constant, the inclination of the swirling flow with respect to the rotation axis of the propeller fan is constant.
- the propeller fan described in Patent Document 1 is based on the assumption that the bell mouth has a circular shape. For this reason, when the bell mouth air outlet is circular, by forming each horizontal rail as in Patent Document 1, the air flow blown from the propeller fan in the direction from the upstream end to the downstream end. Can follow the direction. That is, when the bell mouth has a circular outlet, by configuring each cross rail as in Patent Document 1, it is possible to reduce ventilation resistance and turbulence in airflow, and noise and energy generated when the blower is driven. Loss can be reduced.
- the bell mouth outlet may have a non-axisymmetric shape with the rotation axis of the propeller fan as the central axis.
- the distance between the edge of the bell mouth outlet and the rotation axis of the propeller fan varies depending on the location. Accordingly, the degree of the inclination of the swirling flow with respect to the rotation axis of the propeller fan varies depending on the location at the bell mouth outlet.
- the airflow blown from the propeller fan accelerates within the range where the distance between the edge of the bell mouth outlet and the rotation axis of the propeller fan decreases.
- the inclination of the swirling flow with respect to the rotation axis of the propeller fan becomes small.
- the airflow blown out from the propeller fan decelerates, The inclination of the swirling flow with respect to the rotation axis of the propeller fan becomes large.
- the bell mouth outlet has a non-axisymmetric shape with the rotation axis of the propeller fan as the central axis
- the inclination of the swirling flow with respect to the rotation axis of the propeller fan varies depending on the location at the bell mouth outlet. Therefore, in the case of a blower in which the outlet of the bell mouth is a non-axisymmetric shape with the rotation axis of the propeller fan as the central axis, even if the configuration of each horizontal rail described in Patent Document 1 is adopted for the fan grill, the upstream end There is a problem that the direction from the section toward the downstream end cannot be aligned with the direction of the air flow blown out from the propeller fan, and noise and energy loss generated when the blower is driven cannot be reduced.
- the present invention has been made in order to solve the above-described problems, and in a blower in which the outlet of the bell mouth has a non-axisymmetric shape with the rotation axis of the propeller fan as the central axis, the blower is driven more than before. It is a first object to provide a blower including a fan grill that can reduce noise and energy loss that are sometimes generated. Moreover, this invention makes it the 2nd objective to provide the refrigerating-cycle apparatus provided with the said air blower.
- the blower according to the present invention has a propeller fan that rotates about a rotation axis, a blower outlet, a bell mouth that surrounds the outer peripheral side of the propeller fan, and an airflow direction generated by the propeller fan, than the blower outlet.
- a fan grill having a plurality of first bars arranged on the downstream side, and each of the plurality of first bars has an upstream end on the upstream side and a downstream on the downstream side in the airflow direction.
- a cross-section obtained by cutting an arbitrary first crosspiece in a cross section perpendicular to the longitudinal direction of the arbitrary first crosspiece among the plurality of first crosspieces.
- the rotation axis is perpendicular to the rotation axis.
- the position of the rotation axis is a center point
- a virtual line connecting the center point and an arbitrary point on the edge of the air outlet is a second virtual line
- the length of the second imaginary straight line is a radial distance, and when the second imaginary straight line is rotated about the center point in the rotation direction of the propeller fan, the radial distance of the blowout port starts to decrease.
- the radial distance of the outlet starts to increase behind the first point.
- the second imaginary straight line is rotated in the rotation direction with the edge position as the second point and the center point as the center, the radial outlet ends the expansion of the radial distance behind the second point.
- the edge position of the third point, in the direction of rotation The position of the edge of the outlet that is located behind the first point and ahead of the second point and is an intermediate point between the first point and the second point is the fourth point.
- the position of the edge of the outlet that is located behind the second point and in front of the third point in the direction and is an intermediate point between the second point and the third point is the fifth point
- the position of the edge of the outlet that is behind the first point and forward of the fourth point in the rotational direction is the sixth point
- the radial distance from the center point to the sixth point is the first A radial distance
- a position of the edge of the outlet in which the radial distance is the first radial distance and the radial distance is the first radial distance behind the fifth point in the rotational direction is the seventh point.
- a virtual line connecting the center point and the sixth point is a third virtual line
- a temporary line connecting the center point and the seventh point is
- An imaginary straight line is a fourth virtual straight line
- a point located at an intersection of a virtual circle centered on the central point and the third virtual straight line is an eighth point
- the plurality of first first straight lines Of the crosspieces when the point located at the intersection of the virtual circle and the fourth virtual straight line is defined as the ninth point, the shape of the cut surface at the eighth point and the ninth point is the upstream side
- the width in the first direction from the end portion toward the downstream end portion is longer than the width in the second direction perpendicular to the first direction, and the inclination angle of the eighth point is the ninth angle. It is smaller than the inclination angle of the point.
- the refrigeration cycle apparatus includes the blower according to the present invention, and a heat exchanger that exchanges heat between the refrigerant flowing inside and the air supplied by the blower.
- the air outlet of the bell mouth has a non-axisymmetric shape with the rotation axis of the propeller fan as the central axis, and even when the inclination of the swirling flow changes, from the upstream side end portion than before.
- the direction toward the downstream end can be made to follow the direction of the air flow blown from the propeller fan. Therefore, the blower according to the present invention can reduce noise and energy loss generated when the blower is driven in the blower in which the blowout port of the bell mouth has a non-axisymmetric shape about the rotation axis of the propeller fan.
- FIG. 10 is a cross-sectional view of the first crosspiece at the positions of the eighth point and the ninth point shown in FIG. 9, and the first crosspiece is cut at a cross section perpendicular to the longitudinal direction of the first crosspiece at the positions of the eighth point and the ninth point. The cut surface is shown.
- FIG. 10 it is the figure which projected the rotating shaft, the air outlet of the bell mouth, and several 1st crosspieces on the virtual plane perpendicular
- FIG. 3 It is a figure which shows another example of the change of the inclination angle in the air blower which concerns on Embodiment 3 of this invention.
- the air blower which concerns on Embodiment 4 of this invention, it is the figure which projected the rotating shaft, the air outlet of the bell mouth, and several 1st crosspieces on the virtual plane perpendicular
- the cut surface is shown.
- FIG. 1 is a diagram showing a propeller fan of a blower according to Embodiment 1 of the present invention.
- FIG. 1 is a view of the propeller fan 1 observed from the pressure surface side of the blade 3 in the direction of the rotation axis 1 a of the propeller fan 1.
- the pressure surface of the blade 3 is a surface on the side of pushing out air among the surfaces of the blade 3.
- the propeller fan 1 rotates around the rotation shaft 1a. Specifically, as indicated by thin arcuate arrows in FIG. 1, the propeller fan 1 rotates in the direction of the rotation direction 4 about the rotation shaft 1a.
- the propeller fan 1 includes a boss 2 that rotates about a rotating shaft 1a.
- the propeller fan 1 includes a plurality of blades 3 on the outer periphery of the boss 2. That is, the plurality of blades 3 rotate around the rotation shaft 1 a together with the boss 2.
- the wing 3 has a front edge 5, a rear edge 6 and an outer peripheral edge 7 as end portions.
- the leading edge 5 is an end portion that is the front side in the rotation direction of the blade 3.
- the trailing edge 6 is an end portion on the rear side in the rotation direction of the blade 3.
- the outer peripheral edge 7 is a portion that becomes the outer peripheral end of the blade 3 in the radial direction.
- FIG. 2 is a perspective view of the blower according to Embodiment 1 of the present invention, and is a perspective view showing a state where the fan grill is removed.
- FIG. 2 shows the blower 40 with the fan grill 20 removed from the air outlet 11 side of the bell mouth 10.
- the blower 40 according to the first embodiment includes a bell mouth 10.
- the bell mouth 10 has an air outlet 11 and surrounds the outer peripheral side of the propeller fan 1. That is, the bell mouth 10 is a component that constitutes an air passage.
- the edge of the bell mouth outlet has a circular shape around the rotation axis of the propeller fan. That is, in general, the edge of the bell mouth outlet has an axisymmetric shape with the rotation axis of the propeller fan as the central axis.
- the edge 12 of the air outlet 11 of the bell mouth 10 according to the first embodiment has a non-axisymmetric shape with the rotation axis 1a of the propeller fan 1 as the central axis.
- the edge 12 of the air outlet 11 of the bell mouth 10 includes a constant portion 13 and a changing portion 14.
- the constant portion 13 is a portion of the edge 12 where the distance from the rotating shaft 1a is constant.
- the fixed portion 13 has an arc shape centered on the rotating shaft 1a when the fixed portion 13 is observed in the direction of the rotating shaft 1a.
- the changing portion 14 is a portion of the edge 12 where the distance from the rotation axis 1a changes.
- the changing portion 14 has a linear shape when the changing portion 14 is observed in the direction of the rotation axis 1a.
- FIG. 3 is a front view of the fan grill according to Embodiment 1 of the present invention.
- FIG. 4 is a perspective view of the blower according to Embodiment 1 of the present invention, and is a perspective view showing a state where a fan grill is attached.
- FIG. 5 is a cross-sectional view of the first crosspiece of the fan grill according to Embodiment 1 of the present invention, and shows a cut surface obtained by cutting an arbitrary first crosspiece in a cross section perpendicular to the longitudinal direction of the first crosspiece. Yes.
- FIG. 4 shows the blower 40 with the fan grill 20 attached from the air outlet 11 side of the bell mouth 10.
- FIG. 5 is a cross-sectional view of the first crosspiece 21 in the ZZ cross section of FIG. 3, for example.
- the white arrow shown in FIG. 5 has shown the direction of the airflow 90 which blows off from the propeller fan 1 in the cross section shown in FIG.
- the blower 40 includes a fan grill 20 that covers the propeller fan 1 and the air outlet 11 of the bell mouth 10 in a freely ventilated manner so that a human finger does not contact the propeller fan 1.
- the fan grill 20 is disposed on the downstream side of the air outlet 11 of the bell mouth 10 in the airflow direction in which the propeller fan 1 is generated.
- the fan grill 20 has a plurality of first bars 21.
- the plurality of first bars 21 are arranged between the adjacent first bars 21 with an interval such that a human finger is not inserted. That is, the fan grill 20 covers the propeller fan 1 and the air outlet 11 of the bell mouth 10 with a plurality of first crosspieces 21 so as to be freely blown.
- the first bars 21 extending in the vertical direction on the paper surface are arranged at predetermined intervals in the horizontal direction on the paper surface.
- the fan grill 20 includes a plurality of second bars 22 that traverse each of the first bars 21.
- the second bars 22 extending in the horizontal direction of the paper surface are arranged at predetermined intervals in the vertical direction of the paper surface. That is, the plurality of first bars 21 and the plurality of second bars 22 are arranged in a mesh shape.
- the plurality of second bars 22 function to support the first bars 21 and to secure the strength of the first bars 21.
- the number of the second bars 22 is made smaller than the number of the first bars 21.
- each of the first crosspieces 21 has an elongated shape such as an elliptical shape in a cross section cut along a cross section perpendicular to the longitudinal direction of the first crosspiece 21.
- each of the first crosspieces 21 has an upstream end 23 on the upstream side and a downstream end 24 on the downstream side in the airflow direction generated by the propeller fan 1.
- each shape of the 1st crosspiece 21 has the width
- At least a part of the first crosspiece 21 on the cut surface cut in a cross section perpendicular to the longitudinal direction of the first crosspiece 21 is such that the longitudinal direction that is the first direction is relative to the rotation shaft 1 a of the propeller fan 1. Tilted. Specifically, as shown in FIG. 5, a virtual line connecting the upstream end 23 and the downstream end 24 on the cut surface cut in a cross section perpendicular to the longitudinal direction of the first crosspiece 21 is a first virtual straight line 121. And In FIG. 5, a virtual straight line 1 b parallel to the rotation axis 1 a of the propeller fan 1 is drawn. As shown in FIG.
- the downstream end 24 side has an acute angle.
- the angle formed is defined as an inclination angle 140.
- the inclination angle 140 is larger than 0 °. That is, the first virtual straight line 121 is inclined with respect to the virtual straight line 1b. More specifically, in the cut surface cut in a cross section perpendicular to the longitudinal direction of the first crosspiece 21, the first direction from the upstream end 23 to the downstream end 24 is the rotation direction of the propeller fan 1 at the cut surface position.
- the first virtual straight line 121 is inclined with respect to the virtual straight line 1b.
- the airflow blown out from the propeller fan 1 is a swirling flow. That is, the direction of the airflow blown from the propeller fan 1 is inclined with respect to the rotation shaft 1 a of the propeller fan 1. For this reason, as described above, the first imaginary straight line 121 is inclined with respect to the imaginary straight line 1 b, whereby the airflow blown out from the propeller fan 1 easily flows along the first crosspiece 21. If the airflow blown out from the propeller fan 1 can flow along the first crosspiece 21, the ventilation resistance of the fan grill 20 can be reduced. Moreover, if the airflow blown out from the propeller fan 1 can flow along the first crosspiece 21, it is possible to suppress the airflow blown out from the propeller fan 1 from being separated from the surface of the first crosspiece 21. Disturbance can also be suppressed. That is, if the airflow blown out from the propeller fan 1 can flow along the first rail 21, noise and energy loss generated when the blower 40 is driven can be reduced.
- the air outlet 11 of the bell mouth 10 has an axisymmetric shape with the rotation axis 1a of the propeller fan 1 as the central axis
- the degree of inclination of the swirling flow with respect to the rotation axis 1a of the propeller fan 1 is constant.
- the air outlet 11 of the bell mouth 10 has an axisymmetric shape with the rotation axis 1a of the propeller fan 1 as the central axis
- the first virtual straight line 121 with respect to the virtual straight line 1b at each position of the first crosspiece 21. Even if the inclination is constant, the airflow blown out from the propeller fan 1 can flow along the first crosspiece 21.
- the air outlet 11 of the bell mouth 10 has a non-axisymmetric shape with the rotating shaft 1a of the propeller fan 1 as the central axis.
- the inclination of the swirling flow with respect to the rotating shaft 1a of the propeller fan 1 varies depending on the location. Therefore, in the blower 40 according to the first embodiment, when the inclination of the first virtual straight line 121 with respect to the virtual straight line 1b is made constant at each position of the first crosspiece 21, the airflow blown out from the propeller fan 1 is The location which cannot flow along the 1st crosspiece 21 generate
- FIG. 6 is a diagram in which the rotating shaft and the bell mouth outlet are projected onto a virtual plane perpendicular to the rotating shaft in the blower according to Embodiment 1 of the present invention.
- FIG. 7 is a figure for demonstrating the distance of a rotating shaft and the blower outlet of a bellmouth in the air blower concerning Embodiment 1 of this invention.
- the center point 100, the second virtual straight line 122, and the radial distance 130 are defined as follows.
- the position of the rotation shaft 1 a of the propeller fan 1 is set as the center point 100.
- a virtual straight line connecting the center point 100 and an arbitrary point on the edge 12 of the air outlet 11 of the bell mouth 10 is defined as a second virtual straight line 122.
- the length of the second virtual straight line 122 is a radial distance 130. That is, the radial distance 130 represents the distance between the rotating shaft 1 a of the propeller fan 1 and an arbitrary point on the edge 12 of the air outlet 11 of the bell mouth 10.
- the range from the point A to the point B shown in FIG. 6 is a range in which the fixed portion 13 is formed in the edge 12 of the air outlet 11.
- the constant portion 13 has an arc shape centered on the rotation shaft 1a.
- the radial distance 130 is constant without changing. That is, in the range from the point A to the point B, the distance from the rotating shaft 1a of the propeller fan 1 is constant.
- the radial distance 130 is constant without changing as in the range from the point A to the point B.
- the radial distance 130 changes as in the range from the point B to the point D.
- the radial direction distance 130 becomes constant similarly to the range from the A point to the B point and the range from the D point to the E point.
- FIG. 8 is a diagram for explaining the state of the swirling flow of the blower according to Embodiment 1 of the present invention.
- FIG. 8 shows the blower 40 with the fan grill 20 removed from the air outlet 11 side of the bell mouth 10. Due to the rotation of the propeller fan 1, the airflow around the blade 3 flows from the front edge 5 side of the blade 3 and is discharged from the rear edge 6 of the blade 3. When the airflow passing between the blades 3 flows along the blades 3, the direction is changed by the inclination and warpage of the blades 3, and the static pressure increases due to the change in momentum. The airflow blown out from the propeller fan 1 is inclined in the direction of the rotation axis 4a and radially outward with respect to the direction of the rotation shaft 1a as the blades 3 turn. That is, the airflow blown out from the propeller fan 1 becomes a swirling flow.
- the air outlet 11 of the bell mouth 10 has a non-axisymmetric shape with the rotating shaft 1a of the propeller fan 1 as the central axis. For this reason, in the blower 40 according to the first embodiment, the following phenomenon occurs in the airflow blown from the propeller fan 1.
- the radial distance 130 decreases. That is, in the range from the point B to the point C, the side wall 15 of the edge 12 of the air outlet 11 approaches the rotating shaft 1 a of the propeller fan 1 as the propeller fan 1 rotates in the rotation direction 4. Therefore, the blown airflow from the propeller fan 1 that spreads outward in the radial direction while turning is corrected in the direction of the rotation axis 1 a by the range from the point B to the point C in the side wall 15 of the edge 12 of the outlet 11. . Therefore, as shown as an air flow 91 in FIG. 8, in the range from the point B to the point C, the blown air flow from the propeller fan 1 has a strong component in the direction of the rotating shaft 1a and a small inclination with respect to the rotating shaft 1a.
- the radial distance 130 increases in the range from the point C to the point D in the changing portion 14 at the edge 12 of the air outlet 11 of the bell mouth 10. That is, in the range from the point C to the point D, the side wall 15 of the edge 12 of the outlet 11 moves away from the rotating shaft 1 a of the propeller fan 1 as the propeller fan 1 rotates in the rotation direction 4. For this reason, the blown airflow from the propeller fan 1 spreading outward in the radial direction while turning is likely to spread outward in the radial direction. Therefore, as shown as an air flow 92 in FIG. 8, in the range from the point C to the point D, the blown air flow from the propeller fan 1 has a large inclination with respect to the rotating shaft 1a.
- the inclination angle 140 that is the inclination of the first virtual straight line 121 with respect to the virtual straight line 1b is varied depending on the location as follows.
- FIG. 9 and 10 are diagrams in which the rotating shaft, the bell mouth outlet, and the plurality of first bars are projected onto a virtual plane perpendicular to the rotating shaft in the blower according to Embodiment 1 of the present invention.
- FIG. 11 is a cross-sectional view of the first crosspiece at the positions of the eighth point and the ninth point shown in FIG. 9, and the first crosspiece is perpendicular to the longitudinal direction of the first crosspiece at the positions of the eighth point and the ninth point.
- disconnected by the various cross section is shown.
- Fig.11 (a) is sectional drawing of the 1st crosspiece 21 in the 8th point shown in FIG.
- FIG.11 (b) is sectional drawing of the 1st crosspiece 21 in the 9th point shown in FIG.
- the third virtual straight line 123, the fourth virtual straight line 124, the eighth point 108, and the ninth point 109 are defined as follows.
- the position of the edge 12 of the air outlet 11 at which the radial distance 130 starts to decrease is defined as a first point 101. That is, the first point 101 is, for example, the point B in FIG.
- the second imaginary straight line 122 is rotated about the center point 100 in the rotation direction 4 of the propeller fan 1, the position of the edge 12 of the air outlet 11 at which the radial distance 130 starts to increase behind the first point 101.
- the second point 102 is assumed. That is, the second point 102 is, for example, the point C in FIG.
- the third point 103 is, for example, the point D in FIG.
- Position of the edge 12 of the air outlet 11 that is located behind the first point 101 and ahead of the second point 102 in the rotational direction 4 of the propeller fan 1 and serving as an intermediate point between the first point 101 and the second point 102 Is a fourth point 104.
- the position of the edge 12 of the air outlet 11 that is located behind the second point 102 and ahead of the third point 103 in the rotational direction 4 of the propeller fan 1 and serving as an intermediate point between the second point 102 and the third point 103 Is a fifth point 105.
- a position of the edge 12 of the outlet 11 that is behind the first point 101 and forward of the fourth point 104 in the rotation direction 4 of the propeller fan 1 is defined as a sixth point 106.
- a radial distance 130 from the center point 100 to the sixth point 106 is defined as a first radial distance 131.
- a virtual straight line connecting the center point 100 and the sixth point 106 is defined as a third virtual straight line 123.
- a virtual straight line connecting the center point 100 and the seventh point 107 is defined as a fourth virtual straight line 124.
- a point located at the intersection of the virtual circle 150 having an arbitrary radius centered on the central point 100 and the third virtual straight line 123 is defined as an eighth point 108.
- a location located at the intersection of the virtual circle 150 and the fourth virtual straight line 124 is defined as a ninth point 109.
- the position that becomes the eighth point 108 among the plurality of first bars 21 is an arbitrary one of the portions existing in the region P1 shown in FIG. It becomes a place.
- the place that becomes the ninth point 109 is one part of the plurality of first crosspieces 21 that exists in the region Q ⁇ b> 1 shown in FIG. 10. It will be a place to satisfy.
- the region P1 is a virtual straight line connecting the center point 100 and the first point 101, and a portion between the first point 101 and the fourth point 104 in the changing portion 14 of the edge 12 of the outlet 11; This is an area partitioned by a virtual straight line connecting the center point 100 and the fourth point 104.
- the region Q1 is an imaginary straight line connecting the center point 100 and the fifth point 105, and a portion between the fifth point 105 and the third point 103 in the changing portion 14 of the edge 12 of the outlet 11; This is an area partitioned by a virtual straight line connecting the center point 100 and the third point 103.
- the region P1 only needs to include at least the range of the region P1 shown in FIG. For this reason, the region P1 may include a region located in front of the region P1 shown in FIG. 10 in the rotation direction 4 of the propeller fan 1.
- the position of the edge 12 of the air outlet 11 that is an intermediate point between the points A and B shown in FIG. A region between the virtual straight line and a virtual straight line connecting the center point 100 and the fourth point 104 may be defined as a region P1.
- the region Q1 only needs to include at least the range of the region Q1 shown in FIG. Therefore, the region Q1 may include a region located behind the region Q1 illustrated in FIG. 10 in the rotation direction 4 of the propeller fan 1.
- the position of the edge 12 of the air outlet 11 that is an intermediate point between the point D and the point E shown in FIG. A region between this virtual straight line and a virtual straight line connecting the center point 100 and the fifth point 105 may be defined as a region Q1.
- the blown airflow from the propeller fan 1 has a smaller inclination with respect to the rotating shaft 1a than the region Q1 shown in FIG. .
- the inclination of the blown airflow from the propeller fan 1 with respect to the rotation shaft 1a is larger than in the region P1 shown in FIG.
- the inclination angle 140 of the eighth point 108 existing in the region P1 is made smaller than the inclination angle 140 of the ninth point 109 existing in the region Q1. .
- the inclination angle 140 of the first crosspiece 21 By setting the inclination angle 140 of the first crosspiece 21 in this way, the inclination angle 140 can be reduced in the region P1 where the inclination of the airflow blown from the propeller fan 1 with respect to the rotation axis 1a is small.
- the inclination angle 140 can be increased in the region Q1 where the inclination of the blown airflow from the propeller fan 1 with respect to the rotation axis 1a is large.
- the blower 40 according to the first embodiment can reduce the ventilation resistance of the fan grill 20 as compared with the conventional one. Moreover, the air blower 40 which concerns on this Embodiment 1 can suppress that the airflow which blown off from the propeller fan 1 peels from the surface of the 1st crosspiece 21 etc. conventionally, and suppresses disturbance of an airflow conventionally. You can also That is, the air blower 40 according to the first embodiment can reduce noise and energy loss generated when the air blower 40 is driven as compared with the conventional case.
- the inclination angle 140 of the portion of the plurality of first bars 21 existing in the region P1 is set to the same inclination angle. Moreover, the inclination angle 140 of the part which exists in the area
- produce at the time of the drive of the air blower 40 is aimed at.
- the inclination angle 140 of the portion existing in The region P2 is an imaginary straight line connecting the center point 100 and the fourth point 104, and a portion between the fourth point 104 and the second point 102 in the changing portion 14 of the edge 12 of the outlet 11; This is an area partitioned by a virtual straight line connecting the center point 100 and the second point 102.
- region Q2 is an imaginary straight line connecting the center point 100 and the second point 102, and a portion between the second point 102 and the fifth point 105 in the changing portion 14 of the edge 12 of the outlet 11; This is an area partitioned by a virtual straight line connecting the center point 100 and the fifth point 105.
- FIG. 12 is a diagram in which, in the blower according to Embodiment 1 of the present invention, a rotation shaft, a bell mouth outlet, and a plurality of first bars are projected onto a virtual plane perpendicular to the rotation shaft.
- the tenth point 110, the second radial distance 132, the eleventh point 111, the fifth virtual straight line 125, the sixth virtual straight line 126, the twelfth point 112, and the thirteenth point 113 are Define as follows.
- the position of the edge 12 of the outlet 11 that is behind the fourth point 104 and forward of the second point 102 in the rotation direction 4 of the propeller fan 1 is defined as a tenth point 110.
- a radial distance 130 from the center point 100 to the tenth point 110 is defined as a second radial distance 132.
- the position of the edge 12 of the air outlet 11 at which the radial distance 130 becomes the second radial distance 132 at the rear of the second point 102 and forward of the fifth point 105 in the rotation direction 4 of the propeller fan 1 is the eleventh point.
- a virtual straight line connecting the center point 100 and the tenth point 110 is defined as a fifth virtual straight line 125.
- a virtual straight line connecting the center point 100 and the eleventh point 111 is defined as a sixth virtual straight line 126.
- a location located at the intersection of the virtual circle 150 and the fifth virtual straight line 125 is defined as a twelfth point 112.
- a point located at the intersection of the virtual circle 150 and the sixth virtual straight line 126 is defined as a thirteenth point 113.
- the location that becomes the twelfth point 112 among the plurality of first crosspieces 21 is any one of the portions that exist in the region P2 shown in FIG. It becomes a place. Further, among the plurality of first crosspieces 21, the portion that becomes the thirteenth point 113 is one portion of the plurality of first crosspieces 21 that exists in the region Q ⁇ b> 2 shown in FIG. 10. It will be a place to satisfy.
- the blown airflow from the propeller fan 1 has a smaller inclination with respect to the rotating shaft 1a than the region Q2 shown in FIG. .
- the inclination of the blown airflow from the propeller fan 1 with respect to the rotation shaft 1a is larger than in the region P2 shown in FIG.
- the inclination angle 140 of the twelfth point 112 existing in the region P2 is made smaller than the thirteenth point 113 existing in the region Q2.
- the inclination angle 140 of the first crosspiece 21 By setting the inclination angle 140 of the first crosspiece 21 in this way, the inclination angle 140 can be reduced in the region P2 where the inclination of the airflow from the propeller fan 1 with respect to the rotation axis 1a is small.
- the inclination angle 140 can be increased in the region Q2 where the inclination of the blown airflow from the propeller fan 1 with respect to the rotation axis 1a is large.
- the airflow blown from the propeller fan 1 is also in the first crosspiece 21 in the regions P2 and Q2 where the inclination of the blown airflow from the propeller fan 1 with respect to the rotation shaft 1a is different. Can flow along. Therefore, the blower 40 according to the first embodiment can further reduce the ventilation resistance of the fan grill 20. Moreover, the air blower 40 which concerns on this Embodiment 1 can further suppress that the airflow which blown off from the propeller fan 1 peels from the surface of the 1st crosspiece 21, etc., and can also further suppress disorder of an airflow. That is, the air blower 40 according to the first embodiment can further reduce noise and energy loss generated when the air blower 40 is driven.
- the inclination angle 140 of the twelfth point 112 existing in the region P2 is the same as the inclination angle 140 of the eighth point 108 existing in the region P1. Moreover, the inclination angle 140 of the part which exists in the area
- the configuration of the plurality of second crosspieces 22 is not particularly mentioned.
- the plurality of second bars 22 may be configured similarly to the plurality of first bars 21 described above. Ventilation resistance and airflow turbulence can be further reduced, and noise and energy loss generated when the blower 40 is driven can be further reduced.
- FIG. 1 The shape of the air outlet 11 of the bell mouth 10 shown in Embodiment 1 is an example.
- the air outlet 11 of the bell mouth 10 may have the following shape.
- items that are not particularly described are the same as those in Embodiment 1, and the same functions and configurations as those in Embodiment 1 are described using the same reference numerals.
- FIG. 13 is a diagram in which the rotating shaft and the bell mouth outlet are projected onto a virtual plane perpendicular to the rotating shaft in the blower according to Embodiment 2 of the present invention.
- FIG. 14 is a diagram for explaining the distance between the rotating shaft and the bell mouth outlet in the blower according to Embodiment 2 of the present invention.
- FIG. 15 is a diagram in which, in the blower according to Embodiment 2 of the present invention, a rotation shaft, a bell mouth outlet, and a plurality of first bars are projected onto a virtual plane perpendicular to the rotation shaft.
- the difference between the blower 40 shown in the first embodiment and the blower 40 according to the second embodiment is the shape of the changing portion 14 at the edge 12 of the air outlet 11 of the bell mouth 10.
- Embodiment 1 when the change part 14 was observed in the rotating shaft 1a direction, the change part 14 became a linear shape.
- Embodiment 2 when the change part 14 is observed in the rotating shaft 1a direction, the change part 14 becomes circular arc shape.
- the radius of curvature of the changing portion 14 according to the second embodiment is larger than the radius of curvature of the constant portion 13.
- any one point of the edge 12 of the air outlet 11 that is one end of the second imaginary straight line is set to the rotation direction 4 that is the rotation direction of the propeller fan 1.
- the radial distance 130 changes as in the first embodiment.
- the range from the F point to the H point is the changing portion 14.
- the radial distance 130 decreases in the range from the F point to the G point. That is, in the range from the point F to the point G, the distance from the rotating shaft 1a of the propeller fan 1 decreases.
- the radial distance 130 increases. That is, in the range from the point G to the point H, the distance from the rotating shaft 1a of the propeller fan 1 increases.
- the same change as in the first embodiment occurs in the airflow blown out from the propeller fan 1 due to the influence of the changing unit 14. That is, in the range from the F point to the G point where the radial distance 130 is decreasing, the component of the airflow from the propeller fan 1 in the direction of the rotating shaft 1a becomes strong and the inclination with respect to the rotating shaft 1a becomes small. On the other hand, in the range from the G point to the H point where the radial distance 130 increases, the blown airflow from the propeller fan 1 has a large inclination with respect to the rotating shaft 1a.
- the eighth point 108 and the ninth point 109 are defined as in the first embodiment.
- the first point 101 is, for example, the point F in FIG.
- the second point 102 is, for example, the point G in FIG.
- the third point is, for example, point H in FIG.
- the inclination angle 140 of the eighth point 108 is made smaller than the inclination angle 140 of the ninth point 109.
- the inclination angle 140 can be reduced in the region P1 where the inclination of the blown airflow from the propeller fan 1 with respect to the rotating shaft 1a is small as in the first embodiment.
- the inclination angle 140 can be increased in the region Q1 where the inclination of the blown airflow from the propeller fan 1 with respect to the rotation axis 1a is large.
- the inclination angle 140 of the portion of the plurality of first bars 21 existing in the region P1 is set to the same inclination angle. Moreover, the inclination angle 140 of the part which exists in the area
- the blower 40 according to the second embodiment is also blown out from the propeller fan 1 in the region P1 and the region Q1 where the inclination of the blown airflow from the propeller fan 1 with respect to the rotation shaft 1a is different, as in the first embodiment.
- the airflow can flow along the first crosspiece 21. Therefore, the air blower 40 according to the second embodiment can also reduce the ventilation resistance of the fan grill 20 as compared with the conventional one, as in the first embodiment.
- the air blower 40 which concerns on this Embodiment 2 can also suppress that the airflow which blown off from the propeller fan 1 peels from the surface of the 1st crosspiece 21 etc. similarly to Embodiment 1, compared with the former, Disturbance can be suppressed more than before. That is, the blower 40 according to the second embodiment can reduce noise and energy loss generated when the blower 40 is driven, as in the first embodiment.
- the twelfth point 112 and the thirteenth point 113 may be defined, and the inclination angle 140 of the twelfth point 112 may be smaller than the thirteenth point 113.
- Embodiment 3 FIG. Of the plurality of first bars 21, the portions existing in the region P ⁇ b> 1 and the region P ⁇ b> 2 may have different inclination angles 140 for each place. Moreover, the inclination angle 140 may differ in the part which exists in the area
- items that are not particularly described are the same as those in the first or second embodiment, and the same reference numerals are used for the same functions and configurations as those in the first or second embodiment. Will be described.
- FIG. 16 is a diagram illustrating an example of a change in the inclination angle in the blower according to Embodiment 3 of the present invention.
- the continuous line shown in FIG. 16 has shown the change of the inclination angle 140 of the air blower 40 which concerns on this Embodiment 3.
- FIG. 16 the broken line shown in FIG. 16 has shown the change of the inclination angle 140 of the air blower 40 shown in Embodiment 1.
- FIG. 16 is a diagram illustrating an example of a change in the inclination angle in the blower according to Embodiment 3 of the present invention.
- the continuous line shown in FIG. 16 has shown the change of the inclination angle 140 of the air blower 40 which concerns on this Embodiment 3.
- the broken line shown in FIG. 16 has shown the change of the inclination angle 140 of the air blower 40 shown in Embodiment 1.
- the region P ⁇ b> 1 and the region P ⁇ b> 2 among the plurality of first bars 21 As for the existing part, when the inclination angle 140 is seen in the rotation direction 4 of the propeller fan 1, the inclination angle 140 changes. Note that the method of increasing / decreasing the inclination angle 140 shown in FIG. 16 is merely an example. Further, as can be seen from the solid line from the second point 102 to the third point 103 shown in FIG. 16, in the blower 40 according to the third embodiment, the region Q1 and the region Q2 among the plurality of first bars 21 are arranged. As for the existing part, when the inclination angle 140 is seen in the rotation direction 4 of the propeller fan 1, the inclination angle 140 changes. Note that the method of increasing / decreasing the inclination angle 140 shown in FIG. 16 is merely an example.
- the noise and energy generated when the blower 40 is driven by making the inclination angle 140 of the eighth point 108 smaller than the inclination angle 140 of the ninth point 109. Loss can be reduced more than before. Also, in the blower 40 configured as in the third embodiment, the noise and energy loss generated when the blower 40 is driven can be reduced by making the inclination angle 140 of the twelfth point 112 smaller than the thirteenth point 113. Further reduction can be achieved.
- the blowing airflow from the propeller fan 1 is inclined with respect to the rotating shaft 1a. Becomes larger. Even in the range in which the side wall 15 moves away from the rotating shaft 1 a of the propeller fan 1 at the changing portion 14 of the edge 12 of the outlet 11, the inclination of the blown airflow from the propeller fan 1 with respect to the rotating shaft 1 a is the edge of the outlet 11. It changes with the shape of the 12 change parts 14.
- the blower 40 according to the third embodiment when the portion existing in the region P1 and the region P2 among the plurality of first rails 21 is viewed in the rotation direction of the propeller fan 1, the inclination angle 140 is observed. In this case, the inclination angle 140 changes. Further, in the blower 40 according to the third embodiment, when a portion existing in the region Q1 and the region Q2 among the plurality of first crosspieces 21 is viewed in the rotation direction of the propeller fan 1, the inclination angle 140 is observed. In this case, the inclination angle 140 changes. By comprising in this way, the airflow blown out from the propeller fan 1 can flow further along the 1st crosspiece 21, and ventilation resistance and disturbance of an airflow can further be reduced. Therefore, by configuring the blower 40 as in the third embodiment, noise and energy loss generated when the blower 40 is driven can be further reduced.
- FIG. 17 is a diagram illustrating another example of the change in the inclination angle in the blower according to Embodiment 3 of the present invention.
- region P2 among the some 1st crosspieces 21 was changed smoothly.
- the inclination angle 140 of a portion of the plurality of first bars 21 existing in the region P ⁇ b> 1 and the region P ⁇ b> 2 may be changed stepwise.
- the inclination angle 140 of a portion of the plurality of first bars 21 existing in the region Q1 and the region Q2 may be changed stepwise.
- Embodiment 4 FIG.
- the inclination angle 140 of the first crosspiece 21 may be varied according to the distance from the rotating shaft 1a. Noise and energy loss generated when the blower 40 is driven can be further reduced.
- items not particularly described are the same as those in any of the first to third embodiments, and the same functions and configurations as those in any of the first to third embodiments are the same. This will be described using the reference numeral.
- FIG. 18 is a diagram in which, in the blower according to Embodiment 4 of the present invention, a rotating shaft, a bell mouth outlet, and a plurality of first bars are projected onto a virtual plane perpendicular to the rotating shaft.
- FIG. 19 is a cross-sectional view of the first beam at the positions of the 15th and 16th points shown in FIG. 18, and the first beam at the positions of the 15th and 16th points in the longitudinal direction of the first beam. The cut surface cut
- vertical to is shown.
- FIG. 19A is a cross-sectional view of the first crosspiece 21 at the fifteenth point shown in FIG.
- FIG.19 (b) is sectional drawing of the 1st crosspiece 21 in the 16th point shown in FIG.
- the fourteenth point 114, the seventh virtual straight line 127, the fifteenth point 115, and the sixteenth point 116 are defined as follows.
- the position of the edge 12 of the outlet 11 that is behind the first point 101 and forward of the third point 103 in the rotation direction 4 of the propeller fan 1 is defined as a fourteenth point 114.
- a virtual straight line connecting the center point 100 and the fourteenth point 114 is defined as a seventh virtual straight line 127.
- any one position located at the intersection with the seventh virtual straight line 127 is defined as a fifteenth point 115.
- a point located at the intersection with the seventh virtual straight line 127 at a position farther from the center point 100 than the fifteenth point 115 is defined as a sixteenth point 116.
- the inclination angle 140 of the sixteenth point 116 is larger than the inclination angle 140 of the fifteenth point 115. Yes. That is, in the blower 40 according to the fourth embodiment, among the plurality of first crosspieces 21, the position located on the virtual straight line connecting the arbitrary point on the changing portion 14 of the edge 12 and the center point 100 is The inclination angle 140 is larger at the center point 100, that is, at a location away from the rotation shaft 1a.
- the swirling flow blown out from the propeller fan 1 increases in speed as it moves away from the rotating shaft 1a. For this reason, the inclination with respect to the rotating shaft 1a becomes large, so that the airflow which blows off from the propeller fan 1 leaves
- Embodiment 5 By adopting the setting configuration of the inclination angle 140 of the first crosspiece 21 shown in the fifth embodiment in the blower 40 shown in the first to fourth embodiments, noise and energy loss generated when the blower 40 is driven. Can be further reduced.
- items that are not particularly described are the same as in any of Embodiments 1 to 4, and the same functions and configurations as in any of Embodiments 1 to 4 are the same. This will be described using the reference numeral.
- FIG. 20 is a diagram in which a rotating shaft, a bell mouth outlet, and a plurality of first bars are projected onto a virtual plane perpendicular to the rotating shaft in the blower according to Embodiment 5 of the present invention.
- FIG. 21 is a cross-sectional view of the first beam at the positions of the 17th and 18th points shown in FIG. 20, and the first beam is moved in the longitudinal direction of the first beam at the positions of the 17th and 18th points. The cut surface cut
- vertical to is shown.
- FIG. 21A is a cross-sectional view of the first crosspiece 21 at the 17th point shown in FIG.
- FIG. 21B is a cross-sectional view of the first crosspiece 21 at the 18th point shown in FIG.
- FIGS. 21A and 21B are views in which a cross section of the first crosspiece 21 is observed from the same direction. Specifically, FIGS. 21A and 21B are views in which a cross section of the first crosspiece 21 is observed from the lower side of the drawing. That is, FIG. 21A is a cross-sectional view taken along the line XX of FIG. FIG. 21B is a YY sectional view of FIG.
- the 17th point 117 and the 18th point 118 are defined as follows. Any one of the plurality of first bars 21 is defined as a 17th point 117. Among the plurality of first bars 21, a point that is point-symmetric with the 17th point 117 when the center point 100 is set as the center of symmetry is defined as an 18th point 118.
- the airflow blown out from the propeller fan 1 is a swirling flow as described above. For this reason, when the blowing airflow from the propeller fan 1 passing through two points having the center point 100 as the center of symmetry is observed from the same direction, the inclination of the blowing airflow from the propeller fan 1 with respect to the rotation axis 1a is reversed. Therefore, by setting the inclination angle 140 of the first crosspiece 21 as in the fifth embodiment, the airflow blown from the propeller fan 1 can further flow along the first crosspiece 21, and the ventilation Resistance and airflow turbulence can be further reduced. For this reason, the noise and energy loss which generate
- the inclination angle 140 at the 17th point 117 and the inclination angle 140 at the 18th point 118 need not be the same.
- the inclination angle 140 at the seventeenth point 117 may be appropriately determined according to the inclination of the blown airflow from the propeller fan 1 passing through the seventeenth point 117 with respect to the rotation axis 1a.
- the inclination angle 140 at the eighteenth point 118 may be appropriately determined according to the inclination of the blown airflow from the propeller fan 1 passing through the eighteenth point 118 with respect to the rotation axis 1a.
- the position of the seventeenth point 117 shown in FIG. 20 is a position where the blown airflow from the propeller fan 1 is affected by the changing portion 14 of the edge 12. Specifically, the blown airflow from the propeller fan 1 passing through the 17th point 117 is forced to flow by the side wall 15, and the inclination with respect to the rotating shaft 1 a is smaller than the blown airflow from the propeller fan 1 passing through the 18th point 118. Become.
- the position of the eighteenth point 118 shown in FIG. 20 is a position where the blown airflow from the propeller fan 1 is not affected by the changing portion 14 of the edge 12.
- the blowing airflow from the propeller fan 1 passing through the eighteenth point 118 has a smaller inclination with respect to the rotating shaft 1a than the blowing airflow from the propeller fan 1 passing through the seventeenth point 117. Accordingly, in FIG. 21, the inclination angle 140 at the 17th point 117 is smaller than the inclination angle 140 at the 18th point 118.
- Embodiment 6 By manufacturing the fan grill 20 shown in the first to fifth embodiments with the configuration of the sixth embodiment, in addition to the effects shown in the first to fifth embodiments, the fan grill 20 is manufactured. It is also possible to obtain an effect that it becomes easy.
- items that are not particularly described are the same as those in any of the first to fifth embodiments, and the same functions and configurations as those in the first to fifth embodiments are the same. This will be described using the reference numeral.
- FIG. 22 is an enlarged perspective view of a part of the fan grill of the blower according to Embodiment 6 of the present invention.
- FIG. 23 is a diagram in which a rotating shaft, a bell mouth outlet, and a fan grille are projected onto a virtual plane perpendicular to the rotating shaft in the blower according to Embodiment 6 of the present invention.
- FIG. 23 is a diagram for explaining a region P1 and a region Q1 in the sixth embodiment.
- the inclination angle 140 is the same between the adjacent second bars 22. ing. Specifically, in FIG. 22, each of the first bars 21 extends obliquely upward to the right on the paper surface.
- the first crosspiece 21 is constituted by a plurality of crosspiece portions 21 a divided at the position of the second crosspiece 22.
- the crosspiece portion 21a is configured such that the inclination angle 140 does not change.
- each of the first rails 21 according to the sixth embodiment changes the inclination angle 140 for each rail part 21a and changes the inclination angle 140 with the second rail 22 as a boundary.
- Each of the second bars 22 according to the sixth embodiment has an elongated cross section perpendicular to the longitudinal direction, like each of the first bars 21.
- Each of the second bars 22 according to the sixth embodiment has an inclination angle 140 of, for example, 0 °.
- the fan grill 20 is manufactured, for example, by resin injection molding. In this case, when the first crosspiece 21 is twisted and the inclination angle 140 is continuously changed, the structure of the mold part for forming the first crosspiece 21 becomes complicated.
- one first crosspiece 21 is constituted by a plurality of crosspiece portions 21a as in the sixth embodiment, and the crosspiece portion It is also conceivable to change the inclination angle 140 for each 21a.
- the inclination angle 140 is changed at a location other than the position of the second crosspiece 22, the end portions of the adjacent crosspiece portions 21a are directly connected to each other.
- the area of the connection portion is reduced. For this reason, when the edge part of the adjacent crosspiece part 21a is connected directly, the function which prevents the foreign material penetration
- the end of the crosspiece portion 21a is connected to the side surface of the second crosspiece 22.
- the area of a connection location can be enlarged.
- the entire end portion of the crosspiece 21 a can be connected to the side surface of the second crosspiece 22.
- the fan grill 20 according to the sixth embodiment can prevent insufficient strength at the connection points.
- the inclination angle 140 of the crosspiece portion 21a does not change.
- molds the crosspiece part 21a does not become complicated. Accordingly, the fan grill 20 can be easily manufactured by configuring the fan grill 20 as in the sixth embodiment.
- the fan grill 20 when the fan grill 20 is configured as in the sixth embodiment, there is no connection portion between the first beam 21 and the second beam 22 on an imaginary straight line connecting the center point 100 and the first point 101.
- the inclination angle 140 cannot be varied on the virtual straight line.
- the fan grill 20 when there is no connection portion between the first beam 21 and the second beam 22 on an imaginary straight line connecting the center point 100 and the fourth point 104, The inclination angle 140 cannot be varied on the virtual straight line.
- the area P1 cannot be partitioned as shown in FIG. Therefore, when the fan grill 20 is configured as in the sixth embodiment, as shown in FIG. 23, the region P1 may be partitioned stepwise at the position of the second bar 22. And the area
- the fan grill 20 when the fan grill 20 is configured as in the sixth embodiment, there is no connection between the first beam 21 and the second beam 22 on an imaginary straight line connecting the center point 100 and the third point 103.
- the inclination angle 140 cannot be varied on the virtual straight line.
- the fan grill 20 when there is no connection portion between the first beam 21 and the second beam 22 on an imaginary straight line connecting the center point 100 and the fifth point 105, The inclination angle 140 cannot be varied on the virtual straight line.
- the area Q1 cannot be partitioned as shown in FIG. Therefore, when the fan grill 20 is configured as in the sixth embodiment, as shown in FIG. 23, the region Q1 may be partitioned stepwise at the position of the second rail 22. And what is necessary is just to have the area
- each of the second bars 22 has an elongated shape perpendicular to the longitudinal direction as in the sixth embodiment, considering the ease of manufacturing the fan grill 20, each of the second bars 22 is It is preferable not to change the inclination angle 140 for each place in the second crosspiece 22.
- Embodiment 7 FIG.
- the refrigeration cycle apparatus includes a blower, and a heat exchanger that exchanges heat between the refrigerant flowing inside and the air supplied by the blower.
- the blower 40 shown in the first to sixth embodiments can be used as a blower of such a refrigeration cycle apparatus, for example.
- an example in which the blower 40 described in the first to sixth embodiments is used as an air conditioner that is an example of a refrigeration cycle apparatus will be introduced. More specifically, in the following example using the blower 40 in the refrigeration cycle apparatus, the blower 40 is used as the blower of the outdoor unit of the air conditioner.
- items not particularly described are the same as those in any of the first to sixth embodiments, and the same functions and configurations as those in any of the first to sixth embodiments are the same. This will be described using the reference numeral.
- FIG. 24 is a perspective view when the outdoor unit of the air conditioner according to Embodiment 7 of the present invention is viewed from the air outlet side.
- FIG. 25 is a view of the internal structure of the outdoor unit of an air conditioner according to Embodiment 7 of the present invention as viewed from above.
- FIG. 26 is a perspective view of an outdoor unit of an air conditioner according to Embodiment 7 of the present invention when viewed from the air outlet side, and shows a state where the fan grill is removed.
- FIG. 27 is a perspective view showing the internal structure of the outdoor unit for an air-conditioning apparatus according to Embodiment 7 of the present invention. Note that the arrows on the straight line shown in FIG. 25 indicate the air flow around the outdoor unit 50.
- the outdoor unit 50 of the air conditioner includes an outdoor unit body 51 that is a casing.
- the outdoor unit main body 51 includes a side surface 51a, a side surface 51c, a front surface 51b, a back surface 51d, a top surface 51e, and a bottom surface 51f.
- the side surface 51a and the back surface 51d are formed with a suction port 51h for sucking air into the outdoor unit main body 51 from the outside.
- an air outlet 53 for blowing air out of the outdoor unit main body 51 to the outside is formed in the front panel 52 constituting a part of the front surface 51b.
- the interior of the outdoor unit main body 51 is divided into a blower chamber 56 and a machine chamber 57 by a partition plate 51g.
- the blower chamber 56 accommodates the propeller fan 1 and the bell mouth 10 of the blower 40 shown in any of the first to sixth embodiments.
- the propeller fan 1 of the blower 40 is connected to a fan motor 61 on the back surface 51 d side via a shaft portion 62, and is rotationally driven by the fan motor 61.
- the air outlet 11 of the bell mouth 10 of the blower 40 is connected to the front panel 52 of the outdoor unit so as to surround the outer periphery of the air outlet 53.
- the bell mouth 10 may be configured integrally with the front panel 52, or may be configured as a separate body from the front panel 52. By the bell mouth 10, the air path near the air outlet 53 is separated from other spaces in the air blowing chamber 56.
- the blower 40 includes the fan grill 20 at a position downstream of the air outlet 11 of the bell mouth 10 in the airflow direction in which the propeller fan 1 is generated.
- fan grill 20 is provided on front panel 52.
- the front panel 52 covers the air outlet 53 formed in the front panel 52 together with the propeller fan 1 of the blower 40 and the air outlet 11 of the bell mouth 10 so as to allow ventilation. Thereby, contact with an object etc. and propeller fan 1 is prevented, and safety is aimed at.
- a heat exchanger 68 is accommodated in the blower chamber 56.
- the heat exchanger 68 has a substantially L shape in plan view, and is disposed so as to face the suction port 51h formed in the side surface 51a and the back surface 51d.
- the heat exchanger 68 exchanges heat between the refrigerant flowing inside and the air supplied by the blower 40.
- a fin-and-tube heat exchanger is used as the heat exchanger 68. That is, the heat exchanger 68 includes a plurality of fins arranged at predetermined intervals, and a plurality of heat transfer tubes penetrating each fin in the juxtaposition direction of the fins. A refrigerant circulating in the refrigerant circuit flows in each heat transfer tube.
- a compressor 64 is accommodated.
- the compressor 64 is connected to a heat exchanger 68 through a pipe 65 and the like.
- the compressor 64 and the heat exchanger 68 are connected to an indoor heat exchanger (not shown), an expansion valve, and the like to constitute a refrigerant circuit.
- a substrate box 66 is stored.
- Devices such as the fan motor 61 and the compressor 64 mounted on the outdoor unit 50 are controlled by a control board 67 provided in the board box 66.
- the outdoor unit 50 of the air conditioner according to the seventh embodiment includes the blower 40 shown in any one of the first to sixth embodiments in which noise and energy loss are reduced as compared with the conventional one. For this reason, the outdoor unit 50 of the air conditioner according to the seventh embodiment is an outdoor unit with low noise and low energy loss.
- blower 40 shown in the first to sixth embodiments can be used in a refrigeration cycle apparatus other than an air conditioner.
- a water heater that is an example of a refrigeration cycle apparatus includes an outdoor unit including a heat exchanger that exchanges heat between a refrigerant flowing inside and air supplied by a blower.
- the blower 40 shown in Embodiments 1 to 6 may be used as an outdoor unit of a water heater.
- 1 propeller fan 1a rotating shaft, 1b virtual straight line, 2 boss, 3 blades, 4 rotating direction, 5 leading edge, 6 trailing edge, 7 outer periphery, 8 airflow, 10 bell mouth, 11 outlet, 12 edge, 13 constant Part 14, change part, 15 side wall, 20 fan grille, 21 first pier, 21a pier part, 22 second pier, 23 upstream end, 24 downstream end, 40 blower, 50 outdoor unit, 51 outdoor unit Main body, 51a side surface, 51b front surface, 51c side surface, 51d back surface, 51e top surface, 51f bottom surface, 51g partition plate, 51h inlet, 52 front panel, 53 outlet, 56 blower chamber, 57 machine chamber, 61 fan motor, 62 shaft Part, 64 compressor, 65 piping, 66 substrate box, 67 control substrate, 68 heat exchanger, 90 airflow, 91 airflow, 92 Flow, 100 center point, 101 1st point, 102 2nd point, 103 3rd point, 104 4th point, 105 5th point, 106 6th
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Abstract
Description
図1は、本発明の実施の形態1に係る送風機のプロペラファンを示す図である。なお、図1は、プロペラファン1の回転軸1a方向に、該プロペラファン1を翼3の圧力面側から観察した図となっている。翼3の圧力面とは、翼3の表面のうち、空気を押し出す側の表面である。
本実施の形態1に係る送風機40は、ベルマウス10を備えている。ベルマウス10は、吹出口11を有し、プロペラファン1の外周側を囲っている。すなわち、ベルマウス10は、風路を構成する部品である。
プロペラファン1の回転により、翼3周辺の気流は、翼3の前縁5側から流入し、翼3の後縁6から放出される。翼3間を通過する気流は、翼3に沿って流れるときに翼3の傾き及び反りにより方向が変えられ、運動量変化により静圧が上昇する。プロペラファン1から吹き出される気流は、翼3の旋回にしたがって、回転軸1a方向に対して回転方向4側及び半径方向外側に傾斜した向きとなる。すなわち、プロペラファン1から吹き出される気流は、旋回流となる。
図12に示す仮想平面において、第10点110、第2径方向距離132、第11点111、第5仮想直線125、第6仮想直線126、第12点112、及び第13点113を次のように定義する。
実施の形態1で示したベルマウス10の吹出口11の形状は、一例である。プロペラファン1の回転軸1aを中心軸として非軸対称形状となっているベルマウス10の吹出口11に対して、実施の形態1のように第1桟21の傾斜角度を設定することにより、送風機40の駆動時に発生する騒音及びエネルギー損失を従来よりも低減できる。例えば、ベルマウス10の吹出口11は、次のような形状であってもよい。なお、本実施の形態2において、特に記述しない項目については実施の形態1と同様とし、実施の形態1と同一の機能及び構成については同一の符号を用いて述べることとする。
複数の第1桟21のうちで領域P1及び領域P2に存在する部分は、場所毎に傾斜角度140が異なっていてもよい。また、複数の第1桟21のうちで領域Q1及び領域Q2に存在する部分は、場所毎に傾斜角度140が異なっていてもよい。なお、本実施の形態3において、特に記述しない項目については実施の形態1又は実施の形態2と同様とし、実施の形態1又は実施の形態2と同一の機能及び構成については同一の符号を用いて述べることとする。
図16では、複数の第1桟21のうちで領域P1及び領域P2に存在する部分の傾斜角度140を、滑らかに変化させた。これに限らず、例えば図17に示すように、複数の第1桟21のうちで領域P1及び領域P2に存在する部分の傾斜角度140を、階段状に変化させていってもよい。同様に、例えば図17に示すように、複数の第1桟21のうちで領域Q1及び領域Q2に存在する部分の傾斜角度140を、階段状に変化させていってもよい。
実施の形態1~実施の形態3で示した送風機40において、第1桟21の傾斜角度140を回転軸1aからの距離に応じて異ならせてもよい。送風機40の駆動時に発生する騒音及びエネルギー損失をさらに低減できる。なお、本実施の形態4において、特に記述しない項目については実施の形態1~実施の形態3のいずれかと同様とし、実施の形態1~実施の形態3のいずれかと同一の機能及び構成については同一の符号を用いて述べることとする。
実施の形態1~実施の形態4で示した送風機40に本実施の形態5で示す第1桟21の傾斜角度140の設定構成を採用することにより、送風機40の駆動時に発生する騒音及びエネルギー損失をさらに低減できる。なお、本実施の形態5において、特に記述しない項目については実施の形態1~実施の形態4のいずれかと同様とし、実施の形態1~実施の形態4のいずれかと同一の機能及び構成については同一の符号を用いて述べることとする。
実施の形態1~実施の形態5で示したファングリル20を本実施の形態6の構成で製作することにより、実施の形態1~実施の形態5で示した効果に加え、ファングリル20の製作が容易になるという効果を得ることもできる。なお、本実施の形態6において、特に記述しない項目については実施の形態1~実施の形態5のいずれかと同様とし、実施の形態1~実施の形態5のいずれかと同一の機能及び構成については同一の符号を用いて述べることとする。
冷凍サイクル装置は、送風機と、内部を流れる冷媒と送風機によって供給された空気とが熱交換する熱交換器と、を備えている。実施の形態1~実施の形態6で示した送風機40は、例えば、このような冷凍サイクル装置の送風機として用いることができる。以下では、冷凍サイクル装置の一例である空気調和機に、実施の形態1~実施の形態6で示した送風機40を用いた例について紹介する。より詳しくは、冷凍サイクル装置に送風機40を用いた以下の例では、空気調和機の室外機の送風機として、送風機40を用いている。なお、本実施の形態7において、特に記述しない項目については実施の形態1~実施の形態6のいずれかと同様とし、実施の形態1~実施の形態6のいずれかと同一の機能及び構成については同一の符号を用いて述べることとする。
Claims (6)
- 回転軸を中心に回転するプロペラファンと、
吹出口を有し、前記プロペラファンの外周側を囲うベルマウスと、
前記プロペラファンが発生する気流方向において前記吹出口よりも下流側に配置され、複数の第1桟を有するファングリルと、
を備え、
前記複数の第1桟のそれぞれは、前記気流方向に、上流側となる上流側端部と、下流側となる下流側端部とを有し、
前記複数の第1桟のうち、任意の第1桟を該任意の第1桟の長手方向と垂直な断面で切断した切断面において、
前記上流側端部と前記下流側端部とを結ぶ仮想直線を第1仮想直線、
前記第1仮想直線と前記回転軸と平行な仮想直線とがなす角度のうち、前記下流側端部側に鋭角に形成される角度を傾斜角度と定義し、
前記回転軸と垂直で、前記回転軸、前記吹出口及び前記複数の第1桟を投影した仮想平面において、
前記回転軸の位置を中心点、
前記中心点と前記吹出口の縁の任意の一点とを結ぶ仮想直線を第2仮想直線、
前記第2仮想直線の長さを径方向距離、
前記中心点を中心として前記プロペラファンの回転方向に前記第2仮想直線を回転させた際に、前記径方向距離が縮小し始める前記吹出口の前記縁の位置を第1点、
前記中心点を中心として前記回転方向に前記第2仮想直線を回転させた際に、前記第1点の後方において前記径方向距離が拡大し始める前記吹出口の前記縁の位置を第2点、
前記中心点を中心として前記回転方向に前記第2仮想直線を回転させた際に、前記第2点の後方において前記径方向距離の拡大が終了する前記吹出口の前記縁の位置を第3点、
前記回転方向において前記第1点よりも後方で前記第2点よりも前方に位置し、前記第1点と前記第2点との中間点となる前記吹出口の前記縁の位置を第4点、
前記回転方向において前記第2点よりも後方で前記第3点よりも前方に位置し、前記第2点と前記第3点との中間点となる前記吹出口の前記縁の位置を第5点、
前記回転方向において前記第1点よりも後方で前記第4点よりも前方となる前記吹出口の前記縁の位置を第6点、
前記中心点から前記第6点までの前記径方向距離を第1径方向距離、
前記回転方向において前記第5点よりも後方で前記第3点よりも前方となり、前記径方向距離が前記第1径方向距離となる前記吹出口の前記縁の位置を第7点、
前記中心点と前記第6点とを結ぶ仮想直線を第3仮想直線、
前記中心点と前記第7点とを結ぶ仮想直線を第4仮想直線、
前記複数の第1桟のうちで、前記中心点を中心とする仮想円と前記第3仮想直線との交点に位置する箇所を第8点、
前記複数の第1桟のうちで、前記仮想円と前記第4仮想直線との交点に位置する箇所を第9点と定義した場合、
前記第8点及び前記第9点における前記切断面の形状は、前記上流側端部から前記下流側端部へ向かう第1方向の幅が該第1方向と垂直な第2方向の幅よりも長い形状となっており、
前記第8点の前記傾斜角度は、前記第9点の前記傾斜角度よりも小さい送風機。 - 前記仮想平面において、
前記回転方向において前記第4点よりも後方で前記第2点よりも前方となる前記吹出口の前記縁の位置を第10点、
前記中心点から前記第10点までの前記径方向距離を第2径方向距離、
前記回転方向において前記第2点よりも後方で前記第5点よりも前方となり、前記径方向距離が前記第2径方向距離となる前記吹出口の前記縁の位置を第11点、
前記中心点と前記第10点とを結ぶ仮想直線を第5仮想直線、
前記中心点と前記第11点とを結ぶ仮想直線を第6仮想直線、
前記複数の第1桟のうちで、前記仮想円と前記第5仮想直線との交点に位置する箇所を第12点、
前記複数の第1桟のうちで、前記仮想円と前記第6仮想直線との交点に位置する箇所を第13点と定義した場合、
前記第12点及び前記第13点における前記切断面の形状は、前記第1方向の幅が前記第2方向の幅よりも長い形状となっており、
前記第12点の前記傾斜角度は、前記第13点の前記傾斜角度よりも小さい請求項1に記載の送風機。 - 前記仮想平面において、
前記回転方向において前記第1点よりも後方で前記第3点よりも前方となる前記吹出口の前記縁の位置を第14点、
前記中心点と前記第14点とを結ぶ仮想直線を第7仮想直線、
前記複数の第1桟のうちで、第7仮想直線との交点に位置する任意の1箇所を第15点、
前記複数の第1桟のうちで、前記第15点よりも前記中心点から離れた位置において第7仮想直線との交点に位置する箇所を第16点と定義した場合、
前記第15点及び前記第16点における前記切断面の形状は、前記第1方向の幅が前記第2方向の幅よりも長い形状となっており、
前記第16点の前記傾斜角度は、前記第15点の前記傾斜角度よりも大きい請求項1又は請求項2に記載の送風機。 - 前記仮想平面において、
前記複数の第1桟のうちの任意の1箇所を第17点、
前記複数の第1桟のうちで、前記中心点を対称の中心としたときに前記第17点と点対称の位置になる箇所を第18点と定義した場合、
同方向から前記第17点及び前記第18点を観察した際、
前記第17点と前記第18点とは、傾斜方向が逆になっている請求項1~請求項3のいずれか一項に記載の送風機。 - 前記ファングリルは、前記複数の第1桟のそれぞれを横切る複数の第2桟を備え、
前記複数の第1桟のうちの任意の1つを観察した際、前記複数の第2桟のうちの隣接する第2桟の間において前記傾斜角度が同じになっている請求項1~請求項4のいずれか一項に記載の送風機。 - 請求項1~請求項5のいずれか一項に記載の送風機と、
内部を流れる冷媒と前記送風機によって供給された空気とが熱交換する熱交換器と、
を備えた冷凍サイクル装置。
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| EP18921380.4A EP3805571A4 (en) | 2018-06-04 | 2018-06-04 | Blower and refrigeration cycle device |
| PCT/JP2018/021367 WO2019234793A1 (ja) | 2018-06-04 | 2018-06-04 | 送風機及び冷凍サイクル装置 |
| US17/047,098 US11397011B2 (en) | 2018-06-04 | 2018-06-04 | Air-sending device and refrigeration cycle apparatus |
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| JP2004156884A (ja) * | 2002-11-08 | 2004-06-03 | Daikin Ind Ltd | 送風ユニットのファンガード |
| TWM243573U (en) * | 2003-09-19 | 2004-09-11 | Sunonwealth Electr Mach Ind Co | Airflow guiding structure for a heat dissipating fan |
| JP2010117044A (ja) | 2008-11-11 | 2010-05-27 | Mitsubishi Heavy Ind Ltd | 空気調和機用室外機 |
| EP2801763B1 (en) * | 2011-12-19 | 2017-06-21 | Mitsubishi Electric Corporation | Outdoor unit and refrigeration cycle device with outdoor unit |
| JP6109313B2 (ja) * | 2013-07-05 | 2017-04-05 | 三菱電機株式会社 | 送風機及び室外機 |
| DE202015104813U1 (de) * | 2015-09-10 | 2015-10-15 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Strömungsleitgitter zur Anordnung an einem Ventilator |
| JP6849938B2 (ja) | 2016-05-31 | 2021-03-31 | 株式会社富士通ゼネラル | 空気調和機の室外機 |
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2018
- 2018-06-04 WO PCT/JP2018/021367 patent/WO2019234793A1/ja not_active Ceased
- 2018-06-04 EP EP18921380.4A patent/EP3805571A4/en not_active Withdrawn
- 2018-06-04 US US17/047,098 patent/US11397011B2/en active Active
- 2018-06-04 JP JP2020523857A patent/JP6880321B2/ja not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01159498A (ja) * | 1987-12-14 | 1989-06-22 | Mitsubishi Electric Corp | 送風装置 |
| JP2007163036A (ja) | 2005-12-14 | 2007-06-28 | Daikin Ind Ltd | 空気調和機用室外機 |
| JP2015108316A (ja) * | 2013-12-04 | 2015-06-11 | パナソニックIpマネジメント株式会社 | 送風機、およびその送風機を搭載した室外ユニット |
| JP2017223173A (ja) * | 2016-06-16 | 2017-12-21 | 三菱電機株式会社 | 送風機および冷凍サイクル装置の室外機 |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6880321B2 (ja) | 2021-06-02 |
| EP3805571A4 (en) | 2021-05-26 |
| JPWO2019234793A1 (ja) | 2020-12-17 |
| US11397011B2 (en) | 2022-07-26 |
| US20210164670A1 (en) | 2021-06-03 |
| EP3805571A1 (en) | 2021-04-14 |
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