CN105805026A - Air supply device - Google Patents
Air supply device Download PDFInfo
- Publication number
- CN105805026A CN105805026A CN201610027652.3A CN201610027652A CN105805026A CN 105805026 A CN105805026 A CN 105805026A CN 201610027652 A CN201610027652 A CN 201610027652A CN 105805026 A CN105805026 A CN 105805026A
- Authority
- CN
- China
- Prior art keywords
- air
- cover
- centrifugal fan
- guide fins
- mainboard
- 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.)
- Pending
Links
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
- F04D17/08—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
- F04D29/42—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
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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
- 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
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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
- 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
-
- 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
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
Abstract
The invention provides an air supply device which can reduce separation flow generated on a leading edge of a rib and turbulent noise. The air supply device comprises: a centrifugal fan (30) which is rotatably driven by a fan motor (34) and comprises a mainboard (31), a cover (36) arranged opposite to the mainboard (31) and a plurality of ribs (39) which are arranged between the mainboard (31) and the cover (36), an annular hole (40) which is arranged on the air inlet side of the cover (36) and has specified interval with the cover (36), wherein a plurality of guide fins (44) arrnaged on a peripheral surface of the annular hole (40) and has specified intervals in a circumferential direction, the side end of the cover (36) of the guide fins (44) is inclinedly arranged in the opposite direction of the rotary direction of the centrifugal fan (30).
Description
Technical field
The present invention relates to air-supply arrangement, particularly relate to be widely used in air conditioner indoor set etc. include centrifugal fan and the air-supply arrangement of looping pit (orifice).
Background technology
In prior art, for instance, many uses are installed on the indoor set of conditioner, return again to the air-supply arrangement of indoor for the air after sucking room air and making heat exchange.
As this air-supply arrangement, prior art discloses such as following technology: including: comprise the impeller of cover (shroud) and multiple blade；It is configured at the horn mouth (bellmouth) between cover and air suction inlet, is provided with circumferentially arrangement at a prescribed interval at bell-mouthed outer peripheral face and erects the multiple wall portions (referring for example to patent documentation 1) arranged from outer peripheral face.
Prior art literature
Patent documentation
Patent documentation 1: No. 5195983 publication of Japanese Patent
Summary of the invention
The problem that invention to solve
But, in above-mentioned existing structure, by making air-supply arrangement action, utilize blade to be blown to centrifugal direction by the air sucked, but from a part for the air of impeller blowout along with cycle composition, while flowing into again from cover and bell-mouthed gap portion.
In this situation, in the above prior art, due to multiple wall portions that the rotating shaft being provided with blade at horn mouth extends substantially in parallel, so being flowed into the air of impeller and wall portion again to collide and be forcibly guided to the rotating shaft direction of blade.Therefore, the blade again with leaked-in air and rotation collides and is peeling stream, the problem that turbulent flow noise can increase.
The present invention foundes in view of above-mentioned aspect, its object is to, it is provided that a kind of air-supply arrangement, it is possible to reduce the stripping stream that the leading edge at fin produces, it is possible to reduction turbulent flow noise.
For the method solving problem
For realizing described purpose, the present invention provides a kind of air-supply arrangement, it is characterised in that including: centrifugal fan, and it is by fan electromotor rotation driving, the cover being oppositely disposed including mainboard and above-mentioned mainboard and the multiple fins being configured between above-mentioned mainboard and above-mentioned cover；And looping pit, it is being configured at the air inflow side of above-mentioned cover with the spaced apart specified gap of above-mentioned cover, outer peripheral face at above-mentioned looping pit, circumferentially spaced predetermined distance is provided with multiple guide fins, and the above-mentioned cover side end of above-mentioned guide fins configures obliquely at the rightabout of the direction of rotation of above-mentioned centrifugal fan.
According to this structure, owing to being formed with upper end to be positioned at multiple guide fins that rightabout mode tilts with the direction of rotation of centrifugal fan at the outer peripheral face of looping pit, so circulation cross guide fins by the inclination of the direction of rotation rightabout of centrifugal fan in the way of directed and flow into centrifugal fan again, thus, the fluid inlet angle of circulation stream becomes the angle close to the inlet angle in the short transverse of fin, so circulation stream flows into the direction on the surface along fin.
It addition, the present invention is on the basis of described structure, it is characterised in that the outermost end of the above-mentioned cover side end of above-mentioned guide fins is positioned at leans on the position outside radial direction than the suction side opening of above-mentioned cover.
It addition, the present invention is on the basis of described structure, it is characterised in that the outermost end of the suction side open side of the above-mentioned looping pit of above-mentioned guide fins is positioned at leans on the position outside radial direction than the suction side opening of above-mentioned looping pit.
The effect of invention
Air-supply arrangement according to the present invention, by forming guide fins at looping pit, the resistance that circulation stream produces when circulation can be made to increase, circulation stream can be reduced, and circulation stream can be made to flow into the direction on the surface along fin, it is possible to reduce the stripping stream produced at the front-end edge of fin, and can significantly reduce and circulate the turbulent flow noise that stream brings.It addition, by reducing turbulent flow noise, it is possible to increase the wind pushing performance of centrifugal fan, its result can reduce centrifugal fan, it is possible to realize lightweight and cost degradation.
Accompanying drawing explanation
Fig. 1 indicates that the longitudinal section of the 1st embodiment of the indoor unit of the air-supply arrangement applying the present invention.
Fig. 2 is the axonometric chart of the air-supply arrangement of the 1st embodiment.
Fig. 3 is the sectional view of the air-supply arrangement of the 1st embodiment.
Fig. 4 is the axonometric chart of the air-supply arrangement of the 2nd embodiment.
Fig. 5 is the sectional view of the air-supply arrangement of the 2nd embodiment.
Description of reference numerals
10 ceiling flush type indoor units
14 air conditioner main bodys
18 heat exchangers
20 air-supply arrangements
22 decoration panels
30 centrifugal fans
31 mainboards
34 fan electromotors
36 covers (shroud)
37 discharge side openings
38 suction side openings
39 fins
40 looping pits (orifice)
41 discharge side openings
42 suction side openings
44 guide fins
Detailed description of the invention
Hereinafter, with reference to accompanying drawing, the embodiment of the air-supply arrangement of the present invention is illustrated.
Fig. 1 is the sectional side view of the ceiling flush type indoor unit of the air-supply arrangement that invention applies the 1st embodiment.
In present embodiment, as it is shown in figure 1, ceiling flush type indoor unit 10 be arranged on building ceiling 11 and be arranged at this ceiling 11 lower section ceiling 12 between ceiling void 13.
As it is shown in figure 1, this ceiling flush type indoor unit 10 includes the air conditioner main body 14 being formed as the box of open underneath, air conditioner main body 14 is arranged in the way of being hung from ceiling by hanger bolt 15.In the inner side of this air conditioner main body 14, the state contacted with the inner surface with the side plate 17 of air conditioner main body 14 is configured with the heat insulating member 16 of foamed styrene, it is prevented that the condensation of side plate 17.
Lower surface at the upper plate of air conditioner main body 14 is provided with air-supply arrangement 20, and between this air-supply arrangement 20 and heat insulating member 16, the mode of the side to surround air-supply arrangement 20 is configured with vertical view and is bent to form the heat exchanger 18 into substantially tetragon.
Heat exchanger 18 is to work as the vaporizer of cold-producing medium when for blowdown firing, the heat exchanger 18 worked as the radiator of cold-producing medium when warming operation.Heat exchanger 18 carries out the heat exchange of room air and the cold-producing medium being inhaled into the inside of air conditioner main body 14, when for blowdown firing, air-conditioning room air is cooled down, when warming operation, room air is heated.
It addition, in the downside of heat exchanger 18, be configured with drain pan 19 in the way of corresponding with the lower surface of heat exchanger 18.This drain pan 19 is for accepting the drain water produced by heat exchanger 18.It addition, be formed with the suction inlet 21 of air-supply arrangement 20 at the middle body of drain pan 19.
It addition, as depicted in figs. 1 and 2, at the lower surface of air conditioner main body 14, the decoration panel 22 of substantially tetragon is installed in the way of covering the open lower side of air conditioner main body 14.
Middle body at decoration panel 22 is formed with the suction inlet 23 that the suction inlet 21 with drain pan 19 connects, and is releasably provided with the suction grid 24 covering suction inlet 23 in this suction inlet 23 part.It is provided with the filter 25 for removing the dust etc. in air in air conditioner main body 14 side sucking grid 24.
It is respectively formed with the air after being regulated by air delivers to the blow-off outlet 26 of indoor decorating the outside of suction inlet 23 of panel 22 and the position along each limit of decoration panel 22.It addition, be respectively equipped with the wing flap (flap) (not shown) changing wind direction at each blow-off outlet 26.
And, by making air-supply arrangement 20 action, room air is sucked from suction inlet 21,23, and by carrying out heat exchange again through heat exchanger 18 after filter 25, the air after being regulated by air from blow-off outlet 26 delivers to indoor.
Fig. 2 is the axonometric chart of the air-supply arrangement 20 of first embodiment of the present invention.Fig. 3 is the side cross-sectional views of the air-supply arrangement 20 of first embodiment of the present invention.Additionally, the arrow R in Fig. 2 represents the rotation direct of travel of centrifugal fan 100.
As shown in Figures 2 and 3, air-supply arrangement 20 includes centrifugal fan 30, and centrifugal fan 30 includes the mainboard 31 being formed as the tabular of ring-type.Mainboard 31 includes the plate portion 32 of ring-type and is formed at the core in this plate portion 32 and the motor incorporating section 33 of rounding frustum shape extended downwards.
Be accommodated with fan electromotor 34 in motor incorporating section 33, the rotating shaft 35 of fan electromotor 34 extends downwards and links with the bottom surface of motor incorporating section 33.And, drive fan electromotor 34 by rotating, make driving mainboard 31 spinning movement by rotating shaft 35.
Being connected with cover 36 at mainboard 31, cover 36 is formed in the way of side face is formed as the ring-type of arcuation.The upper limb of cover 36 becomes discharge side opening 37, and the lower edge of cover 36 becomes the suction side opening 38 less than discharge side opening 37 diameter.
It is formed with, between the inner peripheral surface of the plate portion 32 of mainboard 31 and cover 36, the multiple fins 39 configured at predetermined intervals in circumference.These each fins 39 by relative to the installation direction of mainboard 31 with different relative to the installation direction of cover 36 in the way of there is twisted shapes.
Configured under at cover 36 has looping pit 40, and looping pit 40 is formed in the way of side face is formed as the ring-type of arcuation.The upper limb of looping pit 40 becomes the discharge side opening 41 less than suction side opening 38 diameter of cover 36, and the lower edge of looping pit 40 becomes the suction side opening 42 bigger than discharge side opening 41 diameter.Outer circumferential side at the suction side opening 42 of looping pit 40 is provided with the substrate 43 of ring-type.
It addition, in the present embodiment, the outer peripheral face at looping pit 40 is provided with the multiple guide fins 44 in the configuration of circumferentially spaced predetermined distance.The outermost end of the upper end of each guide fins 44 has the prominent length that the external diameter of the suction side opening 38 with cover 36 is roughly the same, and the bottom of guide fins 44 is formed in the way of being positioned at the inner end portion of substrate 43.It addition, in the present embodiment, the upper end of guide fins 44 is formed slopely to be positioned at the rightabout mode with the direction of rotation of centrifugal fan 30.
Secondly, the effect of present embodiment is illustrated.
By driving fan electromotor 34, make centrifugal fan 30 rotate in prescribed direction by rotating shaft 35 and drive.Being driven by the rotation of this centrifugal fan 30, suck room air from suction inlet 21,23, the air of this suction is sent to the suction side opening 38 (following, the flowing of this air is called main flow) of cover 36 from the suction side opening 42 of looping pit 40.
And, from suction side opening 38 leaked-in air of cover 36 when the cross-section of centrifugal fan 30, fluid flowing path bending in substantially parallel two arc-shaped that the outer peripheral face of the motor incorporating section 33 by the side face of cover 36 and mainboard 31 is formed, and boosted by multiple fins 39, carry to centrifugal direction.After having carried out heat exchange to the air of centrifugal direction conveying by heat exchanger 18, from blow-off outlet 26 to indoor air-supply.
On the other hand, a part for the air carried to the centrifugal direction of centrifugal fan 30 is with cycle composition, generate the inner side being flowed into cover 36 from the gap between the suction side opening 38 and the discharge side opening 41 of looping pit 40 of cover 36 the air stream being flowed into centrifugal fan 30 again (following, this air stream is called circulation stream).
Now, in present embodiment, owing to being formed with multiple guide fins 44 at the outer peripheral face of looping pit 40, so circulation stream is after directed fin 44 stops, then it is flowed into centrifugal fan 30.Therefore, compared with the situation not forming guide fins 44, the resistance that circulation stream bears when circulation increases, it is possible to reduce the circulation stream being flowed into centrifugal fan 30 again.
Additionally, in present embodiment, owing to the upper end of guide fins 44 is formed slopely to be positioned at the rightabout mode with the direction of rotation of centrifugal fan 30, so circulation cross guide fins 44 by the inclination of the direction of rotation rightabout of centrifugal fan 30 in the way of directed, then be flowed into centrifugal fan 30.Thus, the fluid inlet angle of circulation stream becomes the angle of the inlet angle of the short transverse close to fin 39, so circulation stream flows into the direction on the surface along fin 39.It is as a result, it is possible to reduce the stripping stream produced at the front-end edge of fin 39.
As mentioned above, in present embodiment, by forming guide fins 44 at looping pit 40, the resistance that circulation stream bears can be increased when circulation, circulation stream can be reduced, further, it is possible to make circulation stream flow into the direction on the surface along fin 39, it is possible to reduce the stripping stream produced at the front-end edge of fin 39, it is possible to significantly reduce and circulate the turbulent flow noise that stream brings.
It addition, by reducing turbulent flow noise, it is possible to increase the wind pushing performance of centrifugal fan 30, its result can reduce centrifugal fan 30, it is possible to realize lightweight and cost degradation.
Then the 2nd embodiment of the present invention is illustrated.
Fig. 4 is the axonometric chart of the air-supply arrangement 20 of second embodiment of the present invention.Fig. 5 is the side cross-sectional views of the air-supply arrangement 20 of second embodiment of the present invention.Additionally, for the part mark same symbol identical with above-mentioned 1st embodiment, also the description thereof will be omitted.
As shown in Figure 4 and Figure 5, in present embodiment, also identical with above-mentioned 1st embodiment, the outer peripheral face at looping pit 40 is provided with the multiple guide fins 44 in the configuration of circumferentially spaced predetermined distance.And, in present embodiment, the outermost end of the upper end of each guide fins 44 has the outer radial of the suction side opening 38 compared to cover 36 than periphery more by the prominent length that radial direction foreign side is prominent, and the outermost end of the bottom of guide fins 44 has the prominent length that the outer radial radial direction foreign side of the suction side opening 42 compared to looping pit 40 is prominent.That is, in present embodiment, compared to the 1st embodiment, the width dimensions of guide fins 44 is made to be formed greatly.
Other parts are the structure identical with above-mentioned 1st embodiment.
In present embodiment, identical with above-mentioned 1st embodiment, by driving fan electromotor 34 to rotate driving centrifugal fan 30, room air is sucked from suction inlet, this air being inhaled into is sent to via looping pit 40 and cover 36 inside of centrifugal fan 30, is boosted by multiple fins 39 and carry to centrifugal direction.
On the other hand, after the circulation stream of centrifugal fan 30 is stopped by multiple guide fins 44, then it is flowed into centrifugal fan 30.At this, in the present embodiment, owing to the width dimensions of guide fins 44 is formed greatly, it is possible to increase the resistance that circulation stream bears when circulation further, it is possible to reduce circulation stream further.
Additionally, in present embodiment, inclination by guide fins 44, circulation stream is guided in the way of tilting to the direction of rotation rightabout with centrifugal fan 30, it is possible to make the fluid inlet angle of circulation stream become the angle close to the inlet angle in the short transverse of fin 39, it is possible to make circulation stream flow into the direction on the surface along fin 39.It is as a result, it is possible to reduce further the stripping stream that the front-end edge at fin 39 produces.
As mentioned above, in present embodiment, also identical with above-mentioned 1st embodiment, by forming guide fins 44 at looping pit 40, it is possible to increase the resistance that circulation stream produces when circulation further, and reduce circulation stream further, and, circulation stream can be made to flow into the direction on the surface along fin 39, it is possible to reduce further the stripping stream that the front-end edge at fin 39 produces, it is possible to significantly reduce and circulate the turbulent flow noise that stream causes.
It addition, by reducing turbulent flow noise, it is possible to increase the wind pushing performance of centrifugal fan 30, its result can reduce centrifugal fan 30, it is possible to realize lightweight and cost degradation.
Additionally, this invention is not limited to the respective embodiments described above, various change can be carried out within a range not departing from the gist of the invention as required.
Claims (3)
1. an air-supply arrangement, it is characterised in that including:
Centrifugal fan, it is by fan electromotor rotation driving, the cover being oppositely disposed including mainboard and described mainboard and the multiple fins being configured between described mainboard and described cover；With
Looping pit, it is being configured at the air inflow side of described cover with the spaced apart specified gap of described cover,
At the outer peripheral face of described looping pit, circumferentially spaced predetermined distance being provided with multiple guide fins, the described cover side end of described guide fins configures obliquely at the rightabout of the direction of rotation of described centrifugal fan.
2. air-supply arrangement as claimed in claim 1, it is characterised in that:
The outermost end of the described cover side end of described guide fins is positioned at leans on the position outside radial direction than the suction side opening of described cover.
3. air-supply arrangement as claimed in claim 1 or 2, it is characterised in that:
The outermost end of the suction side open side of the described looping pit of described guide fins is positioned at leans on the position outside radial direction than the suction side opening of described looping pit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-005989 | 2015-01-15 | ||
| JP2015005989A JP2016132991A (en) | 2015-01-15 | 2015-01-15 | Blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105805026A true CN105805026A (en) | 2016-07-27 |
Family
ID=56437758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610027652.3A Pending CN105805026A (en) | 2015-01-15 | 2016-01-15 | Air supply device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2016132991A (en) |
| CN (1) | CN105805026A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112703350A (en) * | 2018-09-14 | 2021-04-23 | 三星电子株式会社 | Outdoor unit of air conditioner |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020230206A1 (en) * | 2019-05-10 | 2020-11-19 | 三菱電機株式会社 | Air-conditioning device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3510328B2 (en) * | 1994-06-17 | 2004-03-29 | 三菱重工業株式会社 | Centrifugal fan |
| JPH102299A (en) * | 1996-06-14 | 1998-01-06 | Matsushita Refrig Co Ltd | Centrifugal blower |
| JP4844678B2 (en) * | 2010-02-10 | 2011-12-28 | ダイキン工業株式会社 | Centrifugal blower |
| JP5293684B2 (en) * | 2010-06-03 | 2013-09-18 | 三菱電機株式会社 | Air conditioner indoor unit |
-
2015
- 2015-01-15 JP JP2015005989A patent/JP2016132991A/en active Pending
-
2016
- 2016-01-15 CN CN201610027652.3A patent/CN105805026A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112703350A (en) * | 2018-09-14 | 2021-04-23 | 三星电子株式会社 | Outdoor unit of air conditioner |
| CN112703350B (en) * | 2018-09-14 | 2023-01-17 | 三星电子株式会社 | Outdoor unit of air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016132991A (en) | 2016-07-25 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160727 |