EP3879113A1 - Oblique flow booster fan - Google Patents
Oblique flow booster fan Download PDFInfo
- Publication number
- EP3879113A1 EP3879113A1 EP21161310.4A EP21161310A EP3879113A1 EP 3879113 A1 EP3879113 A1 EP 3879113A1 EP 21161310 A EP21161310 A EP 21161310A EP 3879113 A1 EP3879113 A1 EP 3879113A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outer ring
- inner cylinder
- booster fan
- oblique flow
- impeller
- 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.)
- Granted
Links
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000013566 allergen Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/06—Helico-centrifugal pumps
-
- 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
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
-
- 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
- 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
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4253—Fan casings with axial entry and discharge
-
- 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
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/626—Mounting or removal of fans
Definitions
- the present invention relates to the technical field of fans, and more particularly to an oblique flow booster fan suitable for air purifiers.
- Air purifiers also known as air cleaners, air cleaners, or air purifiers, refer to the ability to absorb, decompose or transform various air pollutants such as particulate matters in the air, including allergens, indoor PM2.5, etc, so as to improve air cleanliness. Furthermore, air purifiers can also solve the air pollution problem of volatile organic compounds in indoors, underground spaces, and cars caused by decoration or other reasons.
- the power source of the air purifier is the fan, and the operation status of the fan directly affects the performance of the air purifier.
- the higher the purification effect required by the air purifier the greater the drag coefficient of the filter screen, and the greater the wind pressure required for the wind turbine fan. It is difficult for traditional centrifugal wind wheels or axial flow wind wheels to meet this high wind pressure requirement, or much noise will be generated if the fan operates at a sufficient wind pressure, which is undesirable.
- One objective of the present invention is to provide an oblique flow booster fan with high wind pressure and low noise.
- an oblique flow booster fan including: an impeller, comprising an impeller body and a plurality of blades connected to the impeller body, each of the blades spirally extended from a top of the impeller body to a bottom of the impeller body, two ends of each of the blades being provided an upper edge and a lower edge respectively, and the upper edge having a width larger than the lower edge; an air guide assembly, comprising an outer ring, an inner cylinder spaced apart in the outer ring, and a plurality of air guide vanes evenly connected between the outer ring and the inner cylinder; a motor, installed in the inner cylinder and having a rotating shaft connected to the impeller body; and a pressurization volute casing, arranged outside the impeller and connected to the outer ring, one end of the pressurization volute casing being provided with an air inlet, and another end of the outer ring being provided with an air outlet.
- the impeller body is upward extended to form the upper edge that is spiral.
- the impeller has an odd number of the blades.
- the fan further includes a connecting base fixed at a top of the inner cylinder, the rotating shaft of the motor is protruded from the connecting base and connected to the impeller body.
- a holder is provided inside the inner cylinder for installing the motor.
- the inner cylinder is a frustum shape, and an outer diameter of a top of the inner cylinder is larger than that of a bottom of the inner cylinder, the inner cylinder is higher than the outer ring in an axial direction of the rotating shaft, and each of the air guide vanes are higher than the outer ring in the axial direction of the rotating shaft.
- each of the air guide vanes has a top side and a bottom side oppositely arranged, the top side is connected to the top of the inner cylinder and located above the outer ring, the bottom side is respectively connected to the inner cylinder and the outer ring, and the top side and the bottom side are bent toward each other in an axial direction of the rotating shaft to make each of the air guide vanes have an arc structure.
- the pressurization volute casing has a neck that is recessed inward, and an inner wall of the neck is spaced from the blades.
- the outer ring and the bottom edge of the pressurization volute casing are provided with protrusions and grooves matching with each other, and the protrusions are protruded along a radial direction of the outer ring.
- the pressurization volute casing includes a first casing and a second casing that are matched with each other, a first fixing part, a second fixing part, an engaging buckle, and a matching block are provided between the first and the second casings, the engaging buckle and the matching block are detachably engaged with each other, the first fixing part and the second fixing part are detachably connected together by a connector.
- the blades of the impeller in the present invention are spirally extended from the top of the impeller body to the bottom, and the air guide assembly including an outer ring, an inner cylinder spaced apart in the outer ring, and a plurality of air guide vanes evenly connected therebetween are configured below the impeller.
- the wind pressure is increased by using oblique flow pressurization principle, and the wind pressure is further increased due to the guidance of the air guide assembly.
- the two ends of each blade are respectively provided with an upper edge and a lower edge, and the width of the upper edge is greater than the width of the lower edge, thereby reducing the co-frequency resonance and the tail turbulence of the lower edge, thereby controlling the noise. Therefore, the oblique flow booster fan 100 of the present invention has the characteristics of high wind pressure and low noise, when it is applied to an air purifier, the clean air volume (CADR value) of the air purifier is increased accordingly.
- the oblique flow booster fan 100 provided by the present invention is mainly suitable for air purifiers, or other equipments, which is not limited here.
- the oblique flow booster fan 100 of the present invention includes in impeller 110, a air guide assembly 120, a connecting base 130, a motor 140 and a pressurization volute casing 150.
- the connecting base 130 is installed on the air guide assembly 120
- the impeller 110 is installed on the connecting base 130
- the motor 140 is installed between the air guide assembly 120 and the connecting base 130.
- a rotating shaft of the motor 140 is protruded from the connecting base 130 and connected to the impeller 110, for driving the rotation of the impeller 110.
- the pressurization volute casing 150 is covered outside the impeller 110 and connected with the air guide assembly 120, and the pressurization volute casing 150 has a first end near to the impeller 110 provided with an air inlet 150a, and a second end far away from the impeller 110 provided with an air outlet 150b.
- the impeller 110 includes an impeller body 111 and a plurality of blades 112 connected to the impeller body 111, each of the blades 112 is spirally extended from a top of the impeller body 111 to a bottom of the impeller body 111, and a flow channel 113 is formed between two adjacent blades 112. Further, a top end of each blade 112 is provided an upper edge 1121, and a bottom end of each blade 112 is provided a lower edge 1122.
- the distance from the connection starting point of the upper edge 1121 and the impeller body 111 to the end point away from the impeller body 111 is the width of the upper edge 1121.
- the distance from the connection starting point of the lower edge 1122 and the impeller body 111 to the end point away from the impeller body 111 is the width of the lower edge 1122, and the width of the upper edge 1121 is greater than the width of the lower edge 1122, thereby reducing co-frequency resonance and reducing the tail turbulence of the lower edge 1122, thereby controlling and reducing noise.
- the impeller 111 has an odd number of the blades 112.
- nine blades 112 are configured. Combined with the principle of oblique flow pressurization, the wind pressure can be effectively increased. Of course, the number of the blades 112 can be changed according to actual demands.
- the air guide assembly 120 includes an outer ring 121, an inner cylinder 122 spaced apart in the outer ring 121, and a plurality of air guide vanes 123.
- the outer ring 121 is circular
- the inner cylinder 122 is frustum-shaped
- the outer diameter of the top of the inner cylinder 122 is greater than the outer diameter of the bottom of the inner cylinder 122. That is, the outer diameter of the inner cylinder 122 gradually decreases from top to bottom, and such a configuration is conducive to guiding and pressurizing the air flow.
- the inner cylinder 122 is higher than the outer ring 121 in the axial direction of the rotating shaft 141 of the motor 140, and the air guide vanes 123 are evenly connected between the outer ring 121 and the inner cylinder 122. That is, the air guide vanes 123 are evenly arranged along the radial direction of the outer ring 121, and respectively connected to the upper section of the inner cylinder 122 and the top of the outer ring 121. In other words, in the axial direction of the rotating shaft 141, most of the air guide vanes 123 are located above the outer ring 121 (see Fig. 8 ), and the passage formed between two adjacent air guide vanes 123 is conducive to pressurizing the airflow. As a result, the wind pressure of the oblique flow booster fan 100 is increased.
- each air guide vane 123 has a top side 1231 and a bottom side 1232 oppositely arranged, the top side 1231 is connected to the top of the inner cylinder 122 and located above the outer ring 121, the bottom side 1232 is connected to the tops of the inner cylinder 122 and the outer ring 121 respectively, and the top side 1231 and the bottom side 1232 are bent toward each other in an axial direction of the rotating shaft 141 to make each air guide vane 123 have an arc structure. That is, the top side 1231 and the bottom side 1232 deviate from the vertical direction and bend toward each other.
- the outer diameter of the top of the inner cylinder 122 corresponds to the outer diameter of the connecting base 130
- the inner cylinder 122 is provided with a holder 1221 for mounting on the motor 140 and a protruding post 1222 for connecting with the connecting base 130.
- the connecting base 130 is provided with a fixing hole 131 at a position corresponding to the protruding post 1222, and a through hole 132 is also opened in the middle of the connecting base 130.
- the motor 140 is installed in the holder 1221, and the rotating shaft 141 of the motor 140 is extended above the connecting base 130 through the through hole 132 on the connecting base 130 to connect to the impeller body 111, and then the connecting base 130 is clamped on the top of the inner cylinder 122, and the fixing hole 131 on the connecting base 130 is screwed to the protruding post 1222, thereby realizing the fixing between the connecting base 130 and the inner cylinder 122.
- the pressurization volute casing 150 is arranged outside the impeller 110 and connected with the outer ring 121, and the end of the pressurization volute casing 150 adjacent to the impeller 110 is provided an air inlet 150a, the other end of the pressurization volute casing 150 is provided with an air outlet 150b.
- the pressurization volute casing 150 has a neck 150c that is recessed inward and located at a position adjacent to the air inlet 150a, and there is a certain gap between the inner wall of the neck 150c and the blades 112.
- the pressurization volute casing 150 includes a first casing 151 and a second casing 152 that are matched with each other.
- the first casing 151 is provided with first fixing parts 1511 and engaging buckles 1512
- the second casing 152 is provided with second fixing parts 1521 that match with the first fixing parts 1511 and matching blocks 1522 that match with the engaging buckles 1512.
- the engaging buckles 1512 and the matching blocks 1522 can be detachably engaged with each other, and the first fixing parts 1511 and the second fixing parts 1521 can be detachably connected together by a connector (such as a bolt).
- the edge of the outer ring 121 has a protrusion 1211 protruded in the radial direction (see Fig. 9 ), and the first casing 151 or the second casing 152 is correspondingly provided with a clamping block.
- a clamping block 1513 is protruded from the bottom of the first casing 151, and the clamping block 1513 is provided with a groove (not shown) corresponding to the protrusion 1211.
- the first casing 151 is engaged with the outer ring 121 by the engagement between the protrusion 1211 and the clamping block 1513.
- the engagement parts also can be configured between the second casing 152 and the outer ring 121.
- the motor 140 drives the impeller 110 to rotate, so that the airflow enters the pressurization volute casing 150 from the air inlet 150a, and flow in the flow channel 113 along the arrow in Fig. 4 .
- the wind pressure can be effectively increased due to the oblique flow pressurization principle and the guidance of the air guide assembly 120.
- the widths of the upper edges 1121 of the blades 112 are greater than the widths of the lower edge 1122 thereof, therefore the co-frequency resonance can be reduced, and the tail turbulence of the lower edge 1122 can be reduced as well, thereby controlling and reducing the noise.
- the blades 112 of the impeller 110 in the present invention are spirally extended from the top of the impeller body to the bottom, and the air guide assembly 120 including an outer ring 121, an inner cylinder 122 spaced apart in the outer ring 121, and a plurality of air guide vanes 123 evenly connected therebetween are configured below the impeller 110.
- the wind pressure is increased by using oblique flow pressurization principle, and the wind pressure is further increased due to the guidance of the air guide assembly 120.
- each blade 112 are respectively provided with an upper edge 1121 and a lower edge 1122, and the width of the upper edge 1121 is greater than the width of the lower edge 1122, thereby reducing the co-frequency resonance and the tail turbulence of the lower edge 1122, thereby controlling the noise. Therefore, the oblique flow booster fan 100 of the present invention has the characteristics of high wind pressure and low noise, when it is applied to an air purifier, the clean air volume (CADR value) of the air purifier is increased accordingly.
- the clean air volume (CADR value) of the air purifier is increased accordingly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Eye Examination Apparatus (AREA)
Abstract
Description
- The present invention relates to the technical field of fans, and more particularly to an oblique flow booster fan suitable for air purifiers.
- Air purifiers, also known as air cleaners, air cleaners, or air purifiers, refer to the ability to absorb, decompose or transform various air pollutants such as particulate matters in the air, including allergens, indoor PM2.5, etc, so as to improve air cleanliness. Furthermore, air purifiers can also solve the air pollution problem of volatile organic compounds in indoors, underground spaces, and cars caused by decoration or other reasons.
- The power source of the air purifier is the fan, and the operation status of the fan directly affects the performance of the air purifier. The higher the purification effect required by the air purifier, the greater the drag coefficient of the filter screen, and the greater the wind pressure required for the wind turbine fan. It is difficult for traditional centrifugal wind wheels or axial flow wind wheels to meet this high wind pressure requirement, or much noise will be generated if the fan operates at a sufficient wind pressure, which is undesirable.
- Therefore, it is necessary to provide a new type of fan with high wind pressure and low noise to solve the above-mentioned problems in the prior art.
- One objective of the present invention is to provide an oblique flow booster fan with high wind pressure and low noise.
- To achieve the mentioned above objective, the present invention provides an oblique flow booster fan including: an impeller, comprising an impeller body and a plurality of blades connected to the impeller body, each of the blades spirally extended from a top of the impeller body to a bottom of the impeller body, two ends of each of the blades being provided an upper edge and a lower edge respectively, and the upper edge having a width larger than the lower edge; an air guide assembly, comprising an outer ring, an inner cylinder spaced apart in the outer ring, and a plurality of air guide vanes evenly connected between the outer ring and the inner cylinder; a motor, installed in the inner cylinder and having a rotating shaft connected to the impeller body; and a pressurization volute casing, arranged outside the impeller and connected to the outer ring, one end of the pressurization volute casing being provided with an air inlet, and another end of the outer ring being provided with an air outlet.
- Preferably, the impeller body is upward extended to form the upper edge that is spiral.
- Preferably, the impeller has an odd number of the blades.
- Preferably, the fan further includes a connecting base fixed at a top of the inner cylinder, the rotating shaft of the motor is protruded from the connecting base and connected to the impeller body.
- Preferably, a holder is provided inside the inner cylinder for installing the motor.
- Preferably, the inner cylinder is a frustum shape, and an outer diameter of a top of the inner cylinder is larger than that of a bottom of the inner cylinder, the inner cylinder is higher than the outer ring in an axial direction of the rotating shaft, and each of the air guide vanes are higher than the outer ring in the axial direction of the rotating shaft.
- Preferably, each of the air guide vanes has a top side and a bottom side oppositely arranged, the top side is connected to the top of the inner cylinder and located above the outer ring, the bottom side is respectively connected to the inner cylinder and the outer ring, and the top side and the bottom side are bent toward each other in an axial direction of the rotating shaft to make each of the air guide vanes have an arc structure.
- Preferably, the pressurization volute casing has a neck that is recessed inward, and an inner wall of the neck is spaced from the blades.
- Preferably, the outer ring and the bottom edge of the pressurization volute casing are provided with protrusions and grooves matching with each other, and the protrusions are protruded along a radial direction of the outer ring.
- Preferably, the pressurization volute casing includes a first casing and a second casing that are matched with each other, a first fixing part, a second fixing part, an engaging buckle, and a matching block are provided between the first and the second casings, the engaging buckle and the matching block are detachably engaged with each other, the first fixing part and the second fixing part are detachably connected together by a connector.
- In comparison with the prior art, the blades of the impeller in the present invention are spirally extended from the top of the impeller body to the bottom, and the air guide assembly including an outer ring, an inner cylinder spaced apart in the outer ring, and a plurality of air guide vanes evenly connected therebetween are configured below the impeller. In such a specific configuration, the wind pressure is increased by using oblique flow pressurization principle, and the wind pressure is further increased due to the guidance of the air guide assembly. In addition, the two ends of each blade are respectively provided with an upper edge and a lower edge, and the width of the upper edge is greater than the width of the lower edge, thereby reducing the co-frequency resonance and the tail turbulence of the lower edge, thereby controlling the noise. Therefore, the oblique
flow booster fan 100 of the present invention has the characteristics of high wind pressure and low noise, when it is applied to an air purifier, the clean air volume (CADR value) of the air purifier is increased accordingly. - The accompanying drawings facilitate an understanding of the various embodiments of this invention. In such drawings:
-
Fig. 1 is a perspective view of an oblique flow booster fan according to an embodiment of the present invention; -
Fig. 2 is another perspective view of the oblique flow booster fan ofFig. 1 ; -
Fig. 3 is a partial perspective view of the oblique flow booster fan ofFig. 1 , with the first casing is removed; -
Fig. 4 is a sectional view of the oblique flow booster fan ofFig. 1 ; -
Fig. 5 is a perspective view of a blade of oblique flow booster fan ofFig. 3 ; -
Fig. 6 is a plan view ofFig. 5 ; -
Fig. 7 is a front view ofFig. 5 ; -
Fig. 8 is an exploded view of a air guide assembly, a motor and a connecting base inFig. 3 ; -
Fig. 9 is another perspective view of the air guide assembly inFig. 8 ; and -
Fig. 10 is exploded view of a pressurization volute casing of the oblique flow booster fan inFig. 1 . - The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. The oblique
flow booster fan 100 provided by the present invention is mainly suitable for air purifiers, or other equipments, which is not limited here. - As illustrated in
Figs. 1-4 , the obliqueflow booster fan 100 of the present invention includes inimpeller 110, aair guide assembly 120, a connectingbase 130, amotor 140 and apressurization volute casing 150. The connectingbase 130 is installed on theair guide assembly 120, theimpeller 110 is installed on theconnecting base 130, and themotor 140 is installed between theair guide assembly 120 and theconnecting base 130. Specifically, a rotating shaft of themotor 140 is protruded from theconnecting base 130 and connected to theimpeller 110, for driving the rotation of theimpeller 110. Thepressurization volute casing 150 is covered outside theimpeller 110 and connected with theair guide assembly 120, and thepressurization volute casing 150 has a first end near to theimpeller 110 provided with anair inlet 150a, and a second end far away from theimpeller 110 provided with anair outlet 150b. - Referring to
Figs. 3-7 , theimpeller 110 includes animpeller body 111 and a plurality ofblades 112 connected to theimpeller body 111, each of theblades 112 is spirally extended from a top of theimpeller body 111 to a bottom of theimpeller body 111, and aflow channel 113 is formed between twoadjacent blades 112. Further, a top end of eachblade 112 is provided anupper edge 1121, and a bottom end of eachblade 112 is provided alower edge 1122. - Referring to
Figs. 5-7 , the distance from the connection starting point of theupper edge 1121 and theimpeller body 111 to the end point away from theimpeller body 111 is the width of theupper edge 1121. Correspondingly, the distance from the connection starting point of thelower edge 1122 and theimpeller body 111 to the end point away from theimpeller body 111 is the width of thelower edge 1122, and the width of theupper edge 1121 is greater than the width of thelower edge 1122, thereby reducing co-frequency resonance and reducing the tail turbulence of thelower edge 1122, thereby controlling and reducing noise. - Preferably, the
impeller 111 has an odd number of theblades 112. As a preferred embodiment, nineblades 112 are configured. Combined with the principle of oblique flow pressurization, the wind pressure can be effectively increased. Of course, the number of theblades 112 can be changed according to actual demands. - Referring to
Figs. 4 ,8-9 , theair guide assembly 120 includes anouter ring 121, aninner cylinder 122 spaced apart in theouter ring 121, and a plurality ofair guide vanes 123. Specifically, theouter ring 121 is circular, theinner cylinder 122 is frustum-shaped, and the outer diameter of the top of theinner cylinder 122 is greater than the outer diameter of the bottom of theinner cylinder 122. That is, the outer diameter of theinner cylinder 122 gradually decreases from top to bottom, and such a configuration is conducive to guiding and pressurizing the air flow. Meanwhile, theinner cylinder 122 is higher than theouter ring 121 in the axial direction of the rotatingshaft 141 of themotor 140, and theair guide vanes 123 are evenly connected between theouter ring 121 and theinner cylinder 122. That is, theair guide vanes 123 are evenly arranged along the radial direction of theouter ring 121, and respectively connected to the upper section of theinner cylinder 122 and the top of theouter ring 121. In other words, in the axial direction of the rotatingshaft 141, most of theair guide vanes 123 are located above the outer ring 121 (seeFig. 8 ), and the passage formed between two adjacentair guide vanes 123 is conducive to pressurizing the airflow. As a result, the wind pressure of the obliqueflow booster fan 100 is increased. - Referring to
Figs. 8-9 , eachair guide vane 123 has atop side 1231 and abottom side 1232 oppositely arranged, thetop side 1231 is connected to the top of theinner cylinder 122 and located above theouter ring 121, thebottom side 1232 is connected to the tops of theinner cylinder 122 and theouter ring 121 respectively, and thetop side 1231 and thebottom side 1232 are bent toward each other in an axial direction of the rotatingshaft 141 to make eachair guide vane 123 have an arc structure. That is, thetop side 1231 and thebottom side 1232 deviate from the vertical direction and bend toward each other. - Referring again to
Figs. 3-4 and8 , the outer diameter of the top of theinner cylinder 122 corresponds to the outer diameter of the connectingbase 130, and theinner cylinder 122 is provided with aholder 1221 for mounting on themotor 140 and a protrudingpost 1222 for connecting with theconnecting base 130. Theconnecting base 130 is provided with afixing hole 131 at a position corresponding to the protrudingpost 1222, and a throughhole 132 is also opened in the middle of theconnecting base 130. During installation, themotor 140 is installed in theholder 1221, and therotating shaft 141 of themotor 140 is extended above the connectingbase 130 through the throughhole 132 on the connectingbase 130 to connect to theimpeller body 111, and then theconnecting base 130 is clamped on the top of theinner cylinder 122, and thefixing hole 131 on the connectingbase 130 is screwed to the protrudingpost 1222, thereby realizing the fixing between theconnecting base 130 and theinner cylinder 122. - Referring to
Figs. 1 to 4 and10 again, thepressurization volute casing 150 is arranged outside theimpeller 110 and connected with theouter ring 121, and the end of thepressurization volute casing 150 adjacent to theimpeller 110 is provided anair inlet 150a, the other end of thepressurization volute casing 150 is provided with anair outlet 150b. In addition, thepressurization volute casing 150 has aneck 150c that is recessed inward and located at a position adjacent to theair inlet 150a, and there is a certain gap between the inner wall of theneck 150c and theblades 112. - More specifically, the
pressurization volute casing 150 includes afirst casing 151 and asecond casing 152 that are matched with each other. Thefirst casing 151 is provided with first fixingparts 1511 and engagingbuckles 1512, and thesecond casing 152 is provided withsecond fixing parts 1521 that match with thefirst fixing parts 1511 and matchingblocks 1522 that match with the engagingbuckles 1512. After thefirst casing 151 is connected to thesecond casing 152, the engagingbuckles 1512 and the matching blocks 1522 can be detachably engaged with each other, and thefirst fixing parts 1511 and thesecond fixing parts 1521 can be detachably connected together by a connector (such as a bolt). - As shown in
Figs. 9-10 again, the edge of theouter ring 121 has aprotrusion 1211 protruded in the radial direction (seeFig. 9 ), and thefirst casing 151 or thesecond casing 152 is correspondingly provided with a clamping block. In this embodiment, aclamping block 1513 is protruded from the bottom of thefirst casing 151, and theclamping block 1513 is provided with a groove (not shown) corresponding to theprotrusion 1211. In such a configuration, thefirst casing 151 is engaged with theouter ring 121 by the engagement between theprotrusion 1211 and theclamping block 1513. Of course, the engagement parts also can be configured between thesecond casing 152 and theouter ring 121. - As shown in
Figs. 1-10 again, when the obliqueflow booster fan 100 of the present invention works, themotor 140 drives theimpeller 110 to rotate, so that the airflow enters the pressurization volute casing 150 from theair inlet 150a, and flow in theflow channel 113 along the arrow inFig. 4 . In such a way, the wind pressure can be effectively increased due to the oblique flow pressurization principle and the guidance of theair guide assembly 120. At the same time, since the widths of theupper edges 1121 of theblades 112 are greater than the widths of thelower edge 1122 thereof, therefore the co-frequency resonance can be reduced, and the tail turbulence of thelower edge 1122 can be reduced as well, thereby controlling and reducing the noise. - In conclusion, the
blades 112 of theimpeller 110 in the present invention are spirally extended from the top of the impeller body to the bottom, and theair guide assembly 120 including anouter ring 121, aninner cylinder 122 spaced apart in theouter ring 121, and a plurality ofair guide vanes 123 evenly connected therebetween are configured below theimpeller 110. In such a specific configuration, the wind pressure is increased by using oblique flow pressurization principle, and the wind pressure is further increased due to the guidance of theair guide assembly 120. In addition, the two ends of eachblade 112 are respectively provided with anupper edge 1121 and alower edge 1122, and the width of theupper edge 1121 is greater than the width of thelower edge 1122, thereby reducing the co-frequency resonance and the tail turbulence of thelower edge 1122, thereby controlling the noise. Therefore, the obliqueflow booster fan 100 of the present invention has the characteristics of high wind pressure and low noise, when it is applied to an air purifier, the clean air volume (CADR value) of the air purifier is increased accordingly. - It should be noted that, other structures of the air purifier involved in the present invention can be conventional designs well known to those of ordinary skill in the art, and thus no detailed description will be given here.
- The foregoing description of the present invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. Such modifications and variations that may be apparent to those skilled in the art are intended to be included within the scope of this invention as defined by the accompanying claims.
Claims (10)
- An oblique flow booster fan, comprising:an impeller, comprising an impeller body and a plurality of blades connected to the impeller body, each of the blades spirally extended from a top of the impeller body to a bottom of the impeller body, two ends of each of the blades being provided an upper edge and a lower edge respectively, and the upper edge having a width larger than the lower edge;an air guide assembly, comprising an outer ring, an inner cylinder spaced apart in the outer ring, and a plurality of air guide vanes evenly connected between the outer ring and the inner cylinder;a motor, installed in the inner cylinder and having a rotating shaft connected to the impeller body; anda pressurization volute casing, arranged outside the impeller and connected to the outer ring, one end of the pressurization volute casing being provided with an air inlet, and another end of the outer ring being provided with an air outlet.
- The oblique flow booster fan according to claim 1, wherein the impeller body is upward extended to form the upper edge that is spiral.
- The oblique flow booster fan according to claim 1, wherein the impeller has an odd number of the blades.
- The oblique flow booster fan according to claim 1, further comprising a connecting base fixed at a top of the inner cylinder, the rotating shaft of the motor is protruded from the connecting base and connected to the impeller body.
- The oblique flow booster fan according to claim 1, wherein a holder is provided inside the inner cylinder for installing the motor.
- The oblique flow booster fan according to claim 1, wherein the inner cylinder is a frustum shape, and an outer diameter of a top of the inner cylinder is larger than that of a bottom of the inner cylinder, the inner cylinder is higher than the outer ring in an axial direction of the rotating shaft, and each of the air guide vanes are higher than the outer ring in the axial direction of the rotating shaft.
- The oblique flow booster fan according to claim 1, wherein each of the air guide vanes has a top side and a bottom side oppositely arranged, the top side is connected to the top of the inner cylinder and located above the outer ring, the bottom side is respectively connected to the inner cylinder and the outer ring, and the top side and the bottom side are bent toward each other in an axial direction of the rotating shaft to make each of the air guide vanes have an arc structure.
- The oblique flow booster fan according to claim 1, wherein the pressurization volute casing has a neck that is recessed inward, and an inner wall of the neck is spaced from the blades.
- The oblique flow booster fan according to claim 1, wherein the outer ring and the bottom edge of the pressurization volute casing are provided with protrusions and grooves matching with each other, and the protrusions are protruded along a radial direction of the outer ring.
- The oblique flow booster fan according to claim 1, wherein the pressurization volute casing comprises a first casing and a second casing that are matched with each other, a first fixing part, a second fixing part, an engaging buckle, and a matching block are provided between the first and the second casings, the engaging buckle and the matching block are detachably engaged with each other, the first fixing part and the second fixing part are detachably connected together by a connector.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202020282730.6U CN211820009U (en) | 2020-03-09 | 2020-03-09 | Diagonal flow booster fan |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3879113A1 true EP3879113A1 (en) | 2021-09-15 |
EP3879113C0 EP3879113C0 (en) | 2023-06-07 |
EP3879113B1 EP3879113B1 (en) | 2023-06-07 |
Family
ID=73007833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21161310.4A Active EP3879113B1 (en) | 2020-03-09 | 2021-03-08 | Oblique flow booster fan |
Country Status (4)
Country | Link |
---|---|
US (1) | US20210277914A1 (en) |
EP (1) | EP3879113B1 (en) |
CN (1) | CN211820009U (en) |
ES (1) | ES2949813T3 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120195749A1 (en) | 2004-03-15 | 2012-08-02 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
GB2541601B (en) | 2014-06-06 | 2021-02-17 | Airius Ip Holdings Llc | Columnar air moving devices, systems and methods |
USD987054S1 (en) * | 2019-03-19 | 2023-05-23 | Airius Ip Holdings, Llc | Air moving device |
GB2596757B (en) | 2019-04-17 | 2023-09-13 | Airius Ip Holdings Llc | Air moving device with bypass intake |
USD996595S1 (en) * | 2021-03-09 | 2023-08-22 | Foshan Samyoo Electronic Co., Ltd. | Air purifier |
USD989931S1 (en) * | 2021-03-09 | 2023-06-20 | Foshan Samyoo Electronic Co., Ltd. | Air purifier |
DE212022000171U1 (en) * | 2021-06-04 | 2024-04-16 | Shenzhen Jisu Technology Co., Ltd. | Neck fan |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080178879A1 (en) * | 2007-01-29 | 2008-07-31 | Braebon Medical Corporation | Impeller for a wearable positive airway pressure device |
US20190024676A1 (en) * | 2017-07-18 | 2019-01-24 | Delta Electronics, Inc. | Boost fan structure |
US20190145657A1 (en) * | 2017-11-14 | 2019-05-16 | Regal Beloit America, Inc. | Blower assembly for use in an air handling system and method for assembling the same |
US20190219062A1 (en) * | 2018-01-12 | 2019-07-18 | Nidec Corporation | Air blower and cleaner |
-
2020
- 2020-03-09 CN CN202020282730.6U patent/CN211820009U/en active Active
- 2020-08-28 US US17/005,698 patent/US20210277914A1/en not_active Abandoned
-
2021
- 2021-03-08 ES ES21161310T patent/ES2949813T3/en active Active
- 2021-03-08 EP EP21161310.4A patent/EP3879113B1/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080178879A1 (en) * | 2007-01-29 | 2008-07-31 | Braebon Medical Corporation | Impeller for a wearable positive airway pressure device |
US20190024676A1 (en) * | 2017-07-18 | 2019-01-24 | Delta Electronics, Inc. | Boost fan structure |
US20190145657A1 (en) * | 2017-11-14 | 2019-05-16 | Regal Beloit America, Inc. | Blower assembly for use in an air handling system and method for assembling the same |
US20190219062A1 (en) * | 2018-01-12 | 2019-07-18 | Nidec Corporation | Air blower and cleaner |
Also Published As
Publication number | Publication date |
---|---|
EP3879113C0 (en) | 2023-06-07 |
CN211820009U (en) | 2020-10-30 |
US20210277914A1 (en) | 2021-09-09 |
ES2949813T3 (en) | 2023-10-03 |
EP3879113B1 (en) | 2023-06-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3879113B1 (en) | Oblique flow booster fan | |
WO2017054503A1 (en) | Air purifier and air supply device thereof | |
US9528374B2 (en) | Turbofan, and air-conditioning apparatus | |
CN105026769A (en) | Centrifugal compressor | |
EP3462039B1 (en) | Electric fan and vacuum cleaner having same | |
JP2010084701A (en) | Blowing device | |
JPH09126193A (en) | Centrifugal blower | |
CN104454634A (en) | Range hood and fan system thereof | |
JP2010133297A (en) | Centrifugal blower | |
JP4505885B2 (en) | Blower, air conditioner using the same, and air purifier | |
JP5024349B2 (en) | Blower, air conditioner using the same, and air purifier | |
JPH11264396A (en) | Air blower | |
CN114616426A (en) | Diffuser, diffuser assembly and air conditioner having the same | |
JP3311526B2 (en) | Axial blower | |
CN107339261B (en) | Strong-suction multi-wing centrifugal fan | |
GB2334756A (en) | Fan unit with two fans, guide vanes and tapering duct | |
JP3233286U (en) | Diagonal pressure booster | |
JP6839040B2 (en) | Centrifugal fluid machine | |
US11913460B2 (en) | Exhaust fan | |
CN212643162U (en) | Turbine fan blade, impeller and turbine fan | |
EP3833875A1 (en) | Radial ventilator | |
CN219865582U (en) | Impeller for centrifugal fan with double air inlets, centrifugal fan and range hood | |
CN221074691U (en) | Fresh air fan | |
CN218882567U (en) | Fan with windshield structure | |
CN220566298U (en) | Variable camber guide vane and compressor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20210308 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F04D 29/42 20060101ALI20221202BHEP Ipc: F04D 29/44 20060101ALI20221202BHEP Ipc: F04D 29/62 20060101ALI20221202BHEP Ipc: F04D 17/06 20060101AFI20221202BHEP |
|
INTG | Intention to grant announced |
Effective date: 20221220 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: AT Ref legal event code: REF Ref document number: 1575856 Country of ref document: AT Kind code of ref document: T Effective date: 20230615 Ref country code: DE Ref legal event code: R096 Ref document number: 602021002629 Country of ref document: DE |
|
U01 | Request for unitary effect filed |
Effective date: 20230707 |
|
U07 | Unitary effect registered |
Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI Effective date: 20230720 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2949813 Country of ref document: ES Kind code of ref document: T3 Effective date: 20231003 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230907 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230607 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230607 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230908 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230607 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231007 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230607 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230607 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230607 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231007 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230607 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230607 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602021002629 Country of ref document: DE |
|
U20 | Renewal fee paid [unitary effect] |
Year of fee payment: 4 Effective date: 20240227 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20240308 |