CN203627319U - Centrifugal volute, centrifugal fan with centrifugal volute and air conditioner - Google Patents
Centrifugal volute, centrifugal fan with centrifugal volute and air conditioner Download PDFInfo
- Publication number
- CN203627319U CN203627319U CN201320854585.4U CN201320854585U CN203627319U CN 203627319 U CN203627319 U CN 203627319U CN 201320854585 U CN201320854585 U CN 201320854585U CN 203627319 U CN203627319 U CN 203627319U
- Authority
- CN
- China
- Prior art keywords
- straightway
- axis
- centrifugation blade
- spiral casing
- along
- 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.)
- Withdrawn - After Issue
Links
Images
Abstract
The utility model provides a centrifugal volute, a centrifugal fan with the centrifugal volute and an air conditioner. The centrifugal volute comprises a volute body and a volute tongue. An air channel is formed by the volute body and the volute tongue. The volute tongue protrudes towards the interior of the air channel, and the volute tongue is provided with an outer edge line. The outer edge line is composed of points which have the shortest distance with a wall face facing the volute tongue, on the volute tongue. The outer edge line is provided with a noise reduction segment, the starting point of the noise reduction segment is located at the one second position of the length of the projection, in the axis direction of the centrifugal fan blade, of the outer edge line, and the distance between the noise reduction segment away from the direction of the one second position and the axis of the centrifugal fan blade is gradually increased. The minimum angle formed between the noise reduction segment and the axis of the centrifugal fan blade is an acute angle. According to the centrifugal volute, a noise peak can be effectively reduced, noise can be lowered, and the use comfort is improved.
Description
Technical field
The utility model relates to apparatus of air conditioning field, in particular to a kind of anticentripetal spiral casing, the centrifugal blower with it and air conditioner.
Background technique
The aerodynamic noise of blower fan is because the unsteady flow in gas flow process causes.In gas flow process, gas and gas, gas and object interaction and produce noise.The aerodynamic noise of blower fan is mainly made up of rotational noise and eddy current crack.
The rotational noise of blower fan is because equally distributed blade on blower fan hits gas medium around, causes ambient gas pressure pulsation and the noise that produces.In the time that air flow stream is crossed blade, on blade surface, form boundary layer, boundary layer claims again boundary layer, while referring to that low viscous liquid flows along solid surface, invests a layer fluid of solid surface.Two limits of fan blade are respectively suction limit and pressure limit.The boundary layer on suction limit is easily thickeied, and produces many eddy current.At blade trailing edge, the boundary layer on suction limit and pressure limit converges formation so-called tail district.In tail district, the pressure of air-flow and speed are all significantly less than the numerical value in main air flow district.Thereby in the time that fan blade rotates, in blade exit district, air-flow has very large nonuniformity.This nonuniformity air-flow periodically acts on environment, produces pressure pulsation and forms noise.
And rotational noise shows as spike on noise spectrum, both reached the highest, larger to the noise total value contribution amount of blower fan.So exigence solves the too high problem of current blower fan Rotation Noise peak value.
Model utility content
The utility model aims to provide a kind of anticentripetal spiral casing, has its centrifugal blower and air conditioner, to solve the large problem of noise of centrifugal blower of the prior art.
To achieve these goals, according to an aspect of the present utility model, a kind of anticentripetal spiral casing is provided, this anticentripetal spiral casing comprises spiral case body and snail tongue, spiral case body and snail tongue form air channel, snail tongue is projecting inward to air channel, snail tongue has outer along the line, outer along the line by snail tongue with snail tongue towards the shortest point of the distance of wall form, on outer along the line, there is noise reduction section, the starting point of noise reduction section is positioned at 1/2nd places of the length of outer projection on the axial direction of centrifugation blade along the line, along increasing gradually away from the distance of the direction noise reduction section at 1/2nd places and the axis of centrifugation blade, the minimum angle that noise reduction section becomes with the axis of centrifugation blade is acute angle.
Further, outer first straightway that also comprises along the line, noise reduction section is the second straightway, between the first straightway and the second straightway, forms the first angle.
Further, the second straightway is between the first straightway and the intake grill of anticentripetal spiral casing, the first straightway is parallel to the axis of centrifugation blade, along increasing gradually away from the distance of direction second straightway at 1/2nd places and the axis of centrifugation blade, the minimum angle forming between the second straightway and the axis of centrifugation blade is acute angle.
Further, the first straightway is between the second straightway and the intake grill of anticentripetal spiral casing, the first straightway is parallel to the axis of centrifugation blade, along increasing gradually away from the distance of direction second straightway at 1/2nd places and the axis of centrifugation blade, the minimum angle forming between the second straightway and the axis of centrifugation blade is acute angle.
Further, the first straightway is between the second straightway and the intake grill of anticentripetal spiral casing, along increasing gradually away from the distance of direction first straightway at 1/2nd places and the axis of centrifugation blade, the minimum angle that the first straightway becomes with the axis of centrifugation blade is acute angle, along increasing gradually away from the distance of direction second straightway at 1/2nd places and the axis of centrifugation blade, the minimum angle forming between the second straightway and the axis of centrifugation blade is acute angle.
Further, also comprise the 3rd straightway outward along the line, the 3rd straightway is connected between the first straightway and the second straightway, along increasing gradually away from the distance of direction first straightway of the 3rd straightway and the axis of centrifugation blade, along increasing gradually away from the distance of direction second straightway of the 3rd straightway and the axis of centrifugation blade.
According on the other hand of the present utility model, a kind of centrifugal blower is provided, comprise anticentripetal spiral casing and be arranged on the centrifugation blade in anticentripetal spiral casing, anticentripetal spiral casing is above-mentioned anticentripetal spiral casing.
According on the other hand of the present utility model, a kind of air conditioner is provided, air conditioner comprises anticentripetal spiral casing, anticentripetal spiral casing is above-mentioned anticentripetal spiral casing.
Application the technical solution of the utility model, anticentripetal spiral casing comprises spiral case body and snail tongue, spiral case body and snail tongue form air channel, snail tongue is projecting inward to air channel, snail tongue has outer along the line, outer along the line by snail tongue with snail tongue towards the shortest point of the distance of wall form, there is noise reduction section outward along the line, the starting point of noise reduction section is positioned at 1/2nd places of outer projected length on the axial direction of centrifugation blade along the line, along increasing gradually away from the distance of this noise reduction section of direction at this 1/2nd place and the axis of centrifugation blade, the minimum angle that noise reduction section becomes with the axis of centrifugation blade is acute angle.The noise reduction section of snail tongue can increase the mobile space of fluid, reduces turbulent flow, to reduce to enter the attenuation of the air quantity in anticentripetal spiral casing, thereby reduces noise peak, to reduce noise.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the perspective view of embodiment's of the present utility model centrifugal blower;
Fig. 2 shows according to the plan view of the centrifugal blower of Fig. 1;
Fig. 3 shows the enlarged view at the A place in Fig. 1 of the first embodiment of the present utility model;
Fig. 4 shows the enlarged view at the A place in Fig. 1 of the second embodiment of the present utility model;
Fig. 5 shows the A place enlarged view in Fig. 1 of the 3rd embodiment of the present utility model; And
Fig. 6 shows the plan view of centrifugal blower of the present utility model.
Description of reference numerals: 30, snail tongue; 311, the first straightway; 312, the second straightway; 60, centrifugation blade; 70, exhaust outlet.
Embodiment
Hereinafter also describe the utility model in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
As shown in Figures 1 to 6, according to embodiment of the present utility model, anticentripetal spiral casing comprises spiral case body and snail tongue 30, spiral case body and snail tongue 30 form air channel, snail tongue 30 is projecting inward to air channel, snail tongue 30 has outer along the line, outer along the line by snail tongue 30 with snail tongue 30 towards the shortest point of the distance of wall form, there is noise reduction section outward along the line, the starting point of noise reduction section is positioned at 1/2nd places of outer projected length on the axial direction of centrifugation blade 60 along the line, along increasing gradually away from the distance of this noise reduction section of direction at this 1/2nd place and the axis of centrifugation blade 60, the minimum angle that noise reduction section becomes with the axis of centrifugation blade 60 is acute angle.The noise reduction section of snail tongue 30 can increase the mobile space of fluid, reduces turbulent flow, to reduce to enter the attenuation of the air quantity in anticentripetal spiral casing, thereby reduces noise peak, to reduce noise.
In conjunction with referring to Fig. 2 to 6, in the present embodiment, outer first straightway 311 that also comprises along the line, noise reduction section is to become the first angle between the second straightway 312, the first straightways 311 and the second straightway 312.In other embodiments, outer can be also circular arc or other structure along the line, only needs to guarantee that snail tongue 30 can increase fluid circulation space, reduces turbulent flow.
The length of the first straightway 311 and the second projection of straightway 312 in the direction of the axis of parallel eccentric fan blade 60 is the half of the length outer along the line of snail tongue 30, can realize like this in the time that anticentripetal spiral casing is applied in centrifugal blower, phase place axially the staggering along centrifugation blade 60 of the periodicity effect producing when each blade rotary of centrifugation blade 60, after each like this Phase Stacking, can weaken total acoustic pressure pulsation, improve the too high problem of centrifugal blower Rotation Noise peak value.
Wherein, in conjunction with referring to Fig. 3, the second straightway 312 is between the first straightway 311 and intake grill, the first straightway 311 is parallel to the axis of centrifugation blade 60, increase gradually with the distance of the axis of centrifugation blade 60 along direction the second straightway 312 away from 1/2nd places, the minimum angle that the second straightway 312 becomes with the axis of centrifugation blade 60 is acute angle.Making like this near the part snail tongue of intake grill is oblique snail tongue, to increase the mobile space of fluid, reduces turbulent flow, to reduce to enter the attenuation of the air quantity in anticentripetal spiral casing, thereby reduces noise peak, to reduce noise.
In this kind of structure, the first angle forming between the first straightway 311 and the second straightway 312 is greater than 90 degree and is less than 180 degree.
In conjunction with referring to Fig. 4, the first straightway 311 is between the second straightway 312 and intake grill, the first straightway 311 is parallel to the axis of centrifugation blade 60, increase gradually with the distance of the axis of centrifugation blade 60 along direction the second straightway 312 away from 1/2nd places, the minimum angle that the second straightway 312 becomes with the axis of centrifugation blade 60 is acute angle.
In this kind of structure, the first angle forming between the first straightway 311 and the second straightway 312 is greater than 90 degree and is less than 180 degree.
In conjunction with referring to Fig. 5, the first straightway 311 is between the second straightway 312 and intake grill, increase gradually with the distance of the axis of centrifugation blade 60 along direction the first straightway 311 away from 1/2nd places, the minimum angle that the first straightway 311 becomes with the axis of centrifugation blade 60 is acute angle, increase gradually with the distance of the axis of centrifugation blade 60 along direction the second straightway 312 away from 1/2nd places, the minimum angle that the second straightway 312 becomes with the axis of centrifugation blade 60 is acute angle.Can increase fluid circulation space by this kind of structure, reduce turbulent flow, thereby reduce the air quantity attenuation in anticentripetal spiral casing, thereby realize the object that reduces noise peak.
In other embodiments, also comprise the 3rd straightway outward along the line, the 3rd straightway is connected between the first straightway 311 and the second straightway 312, increase gradually with the distance of the axis of centrifugation blade 60 along direction the first straightway 311 away from the 3rd straightway, increase gradually with the distance of the axis of centrifugation blade 60 along direction the second straightway 312 away from the 3rd straightway.
According to embodiment of the present utility model on the other hand, centrifugal blower comprises anticentripetal spiral casing and be arranged on the centrifugation blade 60 in anticentripetal spiral casing, and this anticentripetal spiral casing is above-mentioned anticentripetal spiral casing.Above-mentioned anticentripetal spiral casing can reduce gas and enter the turbulent flow producing in centrifugal blower, and then reduces the noise peak of gas.
According to embodiment of the present utility model on the other hand, air conditioner comprises anticentripetal spiral casing, and anticentripetal spiral casing is above-mentioned anticentripetal spiral casing.
Specifically can participate in the laboratory data of following table: the unit of the each parameter in another following each table is international unit.
Table 1 is the laboratory data of the before measurement of comparative example 1.Comparative example 1 is the technological scheme of the centrifugal blower of the original snail tongue structure before improving.Wherein before measurement is the test of carrying out in the front side of centrifugal blower.
Table 1
Table 2 is the laboratory data of embodiment 1 and embodiment's 2 before measurement.Embodiment 1 and embodiment 2 are the technological scheme of the centrifugal blower of the snail tongue structure after improving.Embodiment 1 laboratory data that be before measurement identical with comparative example 1 with embodiment 2.Wherein the angle of the first angle in embodiment 2 is greater than the angle of the first angle in embodiment 1.
Table 2
Table 3 is the laboratory data of the rear survey of comparative example 1.Comparative example 1 is the technological scheme of the centrifugal blower of the original snail tongue structure before improving.Wherein survey afterwards the test of carrying out for the rear side of centrifugal blower.
Table 3
Table 4 is the laboratory data of embodiment 1 and embodiment's 2 rear survey.Embodiment 1 and embodiment 2 are the technological scheme of the centrifugal blower of the snail tongue structure after improving.Embodiment 1 laboratory data that be rear survey identical with comparative example 1 with embodiment 2.Wherein the angle of the first angle in embodiment 2 is greater than the angle of the first angle in embodiment 1.
Table 4
From showing above-mentioned laboratory data that snail tongue scheme after improvement, compared with former snail tongue scheme, all decreases at each wind shelves at the noise peak at fundamental frequency place, the improve successful of the snail tongue scheme after improvement to Rotation Noise.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect: snail tongue tilts to make from centrifugation blade to snail tongue room and snail tongue radius increases gradually, have reduced the interaction that sound is interfered, and have reduced noise peak.Incline tongue interacts the non-permanent power (non-permanent power is that speed and pressure do not change in time) from centrifugation blade to snail tongue room and has produced certain phase difference, on blade also there is certain phase difference in non-permanent power like this, the result that the noise that the non-permanent power of out of phase produces superposes mutually must be less than the stack of straight snail tongue cophasing noise that non-permanent power produces, and then has reduced Rotation Noise.Oblique snail tongue structure does not affect aeroperformance and technique is convenient to realize, without increasing cost of production.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. an anticentripetal spiral casing, comprise spiral case body and snail tongue (30), described spiral case body and described snail tongue (30) form air channel, described snail tongue (30) is projecting inward to described air channel, it is characterized in that, described snail tongue (30) has outer along the line, described outer along the line by described snail tongue (30) with described snail tongue (30) towards the shortest point of the distance of wall form, described have noise reduction section on along the line outward, the starting point of described noise reduction section is positioned at 1/2nd places of the length of described outer projection on the axial direction of centrifugation blade (60) along the line, distance along the axis away from noise reduction section described in the direction at described 1/2nd places and described centrifugation blade (60) increases gradually, the minimum angle that described noise reduction section becomes with the axis of described centrifugation blade (60) is acute angle.
2. anticentripetal spiral casing according to claim 1, it is characterized in that, described outer the first straightway (311) that also comprises along the line, described noise reduction section is the second straightway (312), between described the first straightway (311) and described the second straightway (312), forms the first angle.
3. anticentripetal spiral casing according to claim 2, it is characterized in that, described the second straightway (312) is positioned between described the first straightway (311) and the intake grill of anticentripetal spiral casing, described the first straightway (311) is parallel to the axis of described centrifugation blade (60), along increasing gradually away from the second straightway (312) described in the direction at described 1/2nd places and the distance of the axis of described centrifugation blade (60), the minimum angle forming between described the second straightway (312) and the axis of described centrifugation blade (60) is acute angle.
4. anticentripetal spiral casing according to claim 2, it is characterized in that, described the first straightway (311) is positioned between described the second straightway (312) and the intake grill of anticentripetal spiral casing, described the first straightway (311) is parallel to the axis of described centrifugation blade (60), along increasing gradually away from the second straightway (312) described in the direction at described 1/2nd places and the distance of the axis of described centrifugation blade (60), the minimum angle forming between described the second straightway (312) and the axis of described centrifugation blade (60) is acute angle.
5. anticentripetal spiral casing according to claim 2, it is characterized in that, described the first straightway (311) is positioned between described the second straightway (312) and the intake grill of anticentripetal spiral casing, along increasing gradually away from the first straightway (311) described in the direction at described 1/2nd places and the distance of the axis of described centrifugation blade (60), the minimum angle that described the first straightway (311) becomes with the axis of described centrifugation blade (60) is acute angle, along increasing gradually away from the second straightway (312) described in the direction at described 1/2nd places and the distance of the axis of described centrifugation blade (60), the minimum angle forming between the axis of described the second straightway (312) and described centrifugation blade (60) is acute angle.
6. anticentripetal spiral casing according to claim 2, it is characterized in that, described outer the 3rd straightway that also comprises along the line, described the 3rd straightway is connected between described the first straightway (311) and described the second straightway (312), along increasing gradually away from the first straightway (311) described in the direction of described the 3rd straightway and the distance of the axis of described centrifugation blade (60), along increasing gradually away from the second straightway (312) described in the direction of described the 3rd straightway and the distance of the axis of described centrifugation blade (60).
7. a centrifugal blower, comprises anticentripetal spiral casing and is arranged on the centrifugation blade (60) in described anticentripetal spiral casing, it is characterized in that, described anticentripetal spiral casing is the anticentripetal spiral casing described in any one in claim 1 to 6.
8. an air conditioner, described air conditioner comprises anticentripetal spiral casing, it is characterized in that, described anticentripetal spiral casing is the anticentripetal spiral casing described in any one in claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320854585.4U CN203627319U (en) | 2013-12-20 | 2013-12-20 | Centrifugal volute, centrifugal fan with centrifugal volute and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320854585.4U CN203627319U (en) | 2013-12-20 | 2013-12-20 | Centrifugal volute, centrifugal fan with centrifugal volute and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203627319U true CN203627319U (en) | 2014-06-04 |
Family
ID=50813802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320854585.4U Withdrawn - After Issue CN203627319U (en) | 2013-12-20 | 2013-12-20 | Centrifugal volute, centrifugal fan with centrifugal volute and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203627319U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329290A (en) * | 2014-10-29 | 2015-02-04 | 珠海格力电器股份有限公司 | Centrifugal fan and air conditioner with centrifugal fan |
| CN104728172B (en) * | 2013-12-20 | 2017-04-12 | 珠海格力电器股份有限公司 | Centrifugal volute, centrifugal fan with same and air conditioner |
-
2013
- 2013-12-20 CN CN201320854585.4U patent/CN203627319U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728172B (en) * | 2013-12-20 | 2017-04-12 | 珠海格力电器股份有限公司 | Centrifugal volute, centrifugal fan with same and air conditioner |
| CN104329290A (en) * | 2014-10-29 | 2015-02-04 | 珠海格力电器股份有限公司 | Centrifugal fan and air conditioner with centrifugal fan |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104728172B (en) | Centrifugal volute, centrifugal fan with same and air conditioner | |
| CN104196761A (en) | Double-air-inlet centrifugal fan | |
| CN204006333U (en) | Air-conditioner | |
| CN203627319U (en) | Centrifugal volute, centrifugal fan with centrifugal volute and air conditioner | |
| CN104074803A (en) | Cross-flow fan and air conditioner with same | |
| CN103511334A (en) | Impeller and manufacturing method thereof, centrifugal fan and sweeper | |
| CN104564816A (en) | Fan blade and electric fan with fan blade | |
| CN203641103U (en) | Volute of centrifugal fan and air conditioner | |
| CN203584898U (en) | Low-noise high-efficiency central air conditioner outdoor machine cooling axial-flow fan | |
| CN203067346U (en) | Double-inlet centrifugal wind wheel and conditioner adopting same | |
| CN110513327A (en) | Diagonal flow fan and household appliance | |
| CN205214538U (en) | Hair drier | |
| JPS6043193A (en) | Tangent blower | |
| CN204003615U (en) | A kind of spiral case of centrifugal blower | |
| CN203628954U (en) | Tubular air duct system and air conditioner with same | |
| CN207814038U (en) | Through-flow fan blade blade, through-flow fan blade, indoor unit and air conditioner | |
| CN104405654A (en) | Mute axial flow fan | |
| CN209704915U (en) | Centrifugation blade, courtyard machine and the air-conditioning system with it | |
| CN110185640B (en) | Centrifugal fan and household appliance | |
| CN209012125U (en) | Axial-flow windwheel and warm-air drier | |
| CN203584899U (en) | Fan blade and electric fan provided with same | |
| JP2007093136A (en) | Range hood | |
| CN209083670U (en) | Fan blade and fan | |
| CN202659571U (en) | Axial-flow fan blade and air conditioner comprising axial-flow fan blades | |
| CN109681447A (en) | With can noise reduction spiral tougue fan assembly and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20170412 |