CN104675754A - Cabinet volute airflow stalling preventing method - Google Patents
Cabinet volute airflow stalling preventing method Download PDFInfo
- Publication number
- CN104675754A CN104675754A CN201310630324.9A CN201310630324A CN104675754A CN 104675754 A CN104675754 A CN 104675754A CN 201310630324 A CN201310630324 A CN 201310630324A CN 104675754 A CN104675754 A CN 104675754A
- Authority
- CN
- China
- Prior art keywords
- cabinet
- spiral case
- airflow
- stalling
- volute
- 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
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
- 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
-
- 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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Abstract
The invention provides a cabinet volute airflow stalling preventing method. The cabinet volute airflow stalling preventing method can solve the problem that airflow stalling of existing cabinet volutes is prone to resulting in abnormal noise. The cabinet volute airflow stalling preventing method comprises the following steps of 1) determining a volute airflow stalling region, performing noise detection on an overall cabinet to obtain a frequency-sound pressure level spectrogram, comprises the A-weighting sound pressure d of entire frequency bands, when the sound pressure of certain frequency band P existing in the entire frequency bands is 5 decibels higher than the d, determining that abnormal noise exists in the frequency band P and the volute airflow stalling region exists; 2) setting a diversion plate in the airflow stalling region, namely, inside a region from the above of a volute fan arranging unit and an airflow outlet, wherein the diversion plate is connected to the bottom plate of a volute and extends in the airflow outlet direction, and the incidence angle between the front end of the diversion plate and the airflow outlet direction is zero. The cabinet volute airflow stalling preventing method can effectively reduce volute airflow stalling, reduce or even eliminate abnormal noise, even the air output of the volute and optimize the integral performance, and meanwhile, is simple in operation and easy to implement.
Description
Technical field
The present invention relates to air conditioner, be specifically related to the method preventing air-flow stall in cabinet-type air conditioner spiral case.
Background technique
Cabinet-type air conditioner centrifugal cutter is after motor drives, static pressure is recovered under the effect of spiral case, because spiral case blower fan top is large to exhaust outlet this section of regional gas stream VELOCITY DIFFUSION angle, cause pressure to increase fast, fraction speed is unbalance, the speed in this region and circumferential velocity are obviously inconsistent, cause air-flow to have some setbacks, easily form eddy current, be called air-flow stall, spiral case blower fan is called air-flow stall zone to exhaust outlet this section of region, and S region as shown in Figure 1 is air-flow stall zone.
Air-flow stall can make to send around cabinet-type air conditioner spiral case " z z z " wheeze or other more ear-piercing sound, be called different sound, different sound is different from noise, and it is more ear-piercing, causes user to be discontented with, complains complaint one after another.Normally by carrying out noise measuring to cabinet-type air conditioner, obtain frequency-sound pressure level frequency spectrum figure, calculate the A weighted sound pressure level d of whole frequency band, if the sound pressure level that there is certain frequency band P in whole frequency band exceeds d value more than 5 decibels, judge that this frequency band P exists different sound, there is air-flow stall zone in spiral case, as shown in Figure 3 and Figure 4.But when only having the sound pressure level when frequency band each in whole frequency band to exceed d value less than 5 decibels, people's ear is imperceptible different sound, and cabinet-type air conditioner comfort just can reach requirement.
Summary of the invention
The invention provides the method for a kind of cabinet-type air conditioner spiral case gas-tight loss speed, the stall of existing cabinet-type air conditioner spiral case air-flow can be solved, easily produce the problem of different sound.
For reaching the object solved the problems of the technologies described above, the present invention is achieved by the following technical solutions: a kind of method of cabinet-type air conditioner spiral case gas-tight loss speed, described spiral case has the base plate, the first side plate of base plate both sides and the second side plate that surround air-flow exhaust outlet, the snail tongue of spiral case is positioned on the first side plate, comprises the steps:
1) spiral case air-flow stall zone is determined, noise measuring is carried out to cabinet-type air conditioner complete machine, obtain frequency-sound pressure level frequency spectrum figure, calculate the A weighted sound pressure level d of whole frequency band, when the sound pressure level that there is certain frequency band P in whole frequency band exceeds d value more than 5 decibels, judging that this frequency band P exists different sound, there is air-flow stall zone in spiral case;
2) in air-flow stall zone, namely the top of spiral case blower fan placement section arranges guide plate to this part area of air-flow exhaust outlet, and the base plate that guide plate is connected to spiral case extends along air-flow air-out direction, and the angle of attack formed between its front end and air-flow air-out direction is zero.
In the inventive solutions, following additional technical feature is also comprised: the perpendicular distance of the front end distance blower fan placement section horizontal center line of described guide plate is a, the perpendicular distance of rear end distance blower fan placement section horizontal center line is b, between the snail tongue of spiral case and the second side plate, minimum range is c; When the sound pressure level of frequency band P exceed d value be greater than 10 decibels time, the position of adjustment guide plate makes 1.14≤a/c≤1.18,3.19≤b/c≤5.93, when the sound pressure level of frequency band P exceeds d value 5-10 decibel, the position of adjustment guide plate makes 1.14≤a/c≤1.18,1.35≤b/c≤1.6.
Described guide plate is arc plate, and its outer side surface starting point tangent line and substantially horizontal angle are α, and except starting point, any point place tangent line and substantially horizontal angle are β, 30 °≤α≤70 ° and α < β < 90 °.
The length range of described guide plate is 60-80mm, and width range is 3-9mm, and altitude range is 10-80mm.
Compared with prior art, adopt the method for cabinet-type air conditioner spiral case gas-tight of the present invention loss speed, spiral case air-out can be made even, effectively reduce the stall of spiral case air-flow, reduce and even eliminate different sound, optimize overall performance; The method is simple to operate, is easy to realize.
Accompanying drawing explanation
Fig. 1 is the structural representation of cabinet-type air conditioner spiral case in prior art;
Fig. 2 is cabinet-type air conditioner spiral case interior flow field analysis chart in prior art;
Fig. 3 is cabinet-type air conditioner overall frequency-sound pressure level frequency spectrum figure mono-in prior art;
Fig. 4 is cabinet-type air conditioner overall frequency-sound pressure level frequency spectrum figure bis-in prior art;
Fig. 5 is the cabinet-type air conditioner worm frame schematic diagram of the method adopting cabinet-type air conditioner spiral case gas-tight of the present invention loss speed;
Fig. 6 is for adopting the embodiment of the present invention one cabinet-type air conditioner spiral case interior flow field analysis chart;
Fig. 7 is for adopting the embodiment of the present invention one cabinet-type air conditioner overall frequency-sound pressure level frequency spectrum figure;
Fig. 8 is for adopting the embodiment of the present invention two cabinet-type air conditioner spiral case interior flow field analysis chart;
Fig. 9 is for adopting the embodiment of the present invention two cabinet-type air conditioner overall frequency-sound pressure level frequency spectrum figure;
Figure 10 is the structural representation of guide plate in the embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technological scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
With reference to Fig. 1, cabinet-type air conditioner spiral case generally comprises the blower fan placement section 6 of base plate 1, the first side plate 2 of base plate 1 both sides and the second side plate 3, base plate 1 bottom, and base plate 1, first side plate 2 and the second side plate 3 surround air-flow exhaust outlet 4, and the snail tongue 5 of spiral case is positioned on the first side plate 2.
The method of cabinet-type air conditioner spiral case gas-tight loss speed of the present invention comprises the steps:
1) spiral case air-flow stall zone is determined, noise measuring is carried out to cabinet-type air conditioner complete machine, obtain frequency-sound pressure level frequency spectrum figure, calculate the A weighted sound pressure level d of whole frequency band, when the sound pressure level that there is certain frequency band P in whole frequency band exceeds d value more than 5 decibels, judging that this frequency band P exists different sound, there is air-flow stall zone in spiral case;
With reference to the region S shown in Fig. 2 spiral case interior flow field analysis chart, the top of the blower fan placement section 6 of the main corresponding spiral case in air-flow stall zone is to this part region of air-flow exhaust outlet 4.
2) in air-flow stall zone, above the blower fan placement section 6 of i.e. spiral case, guide plate 7 is set to this part area of air-flow exhaust outlet 4, the base plate 1 that guide plate 7 is connected to spiral case extends along air-flow air-out direction 4, the angle of attack formed between its front end and air-flow air-out direction is zero, and namely the bearing of trend of its front end is parallel with air-flow air-out direction.Arrange the cabinet-type air conditioner spiral case of guide plate 7 as shown in Figure 5, air-flow air-out direction is as shown in the arrow at spiral case air-flow exhaust outlet 4 place in Fig. 5.
It should be noted that, being its front end with guide plate 7 near one end of blower fan placement section 6 in the present embodiment, is its rear end near one end of air-flow exhaust outlet 4; In addition, guide plate 7 can be one-body molded or be welded on base plate 1 with spiral case.
Find through test of many times and flow field analysis, the method of the cabinet-type air conditioner spiral case gas-tight loss speed that the embodiment of the present invention provides, the sound pressure level of frequency band P exceeds the concrete size of the A weighted sound pressure level d of whole frequency band, the shape of guide plate 7, concrete mounting point and size has certain influence to employing the method rear defence air-flow stall effect.
Below by specific embodiment analytic explanation in addition.
Embodiment one
As shown in Figure 5, the perpendicular distance defining its front end distance blower fan placement section 6 horizontal center line of guide plate 7 in the present embodiment is a, the perpendicular distance of rear end distance blower fan placement section 6 horizontal center line is b, between snail tongue 5 and the second side plate 3, minimum range is c, outer side surface starting point tangent line and the substantially horizontal angle of arc deflector 7 are α, and except starting point, any point place tangent line and substantially horizontal angle are β.
By carrying out noise measuring to cabinet-type air conditioner complete machine, obtain frequency-sound pressure level frequency spectrum figure, calculate the A weighted sound pressure level d of whole frequency band, compare by calculating, the sound pressure level that there is frequency band 250-300Hz and 450-520Hz in this spectrogram exceeds d value more than 10 decibels, as shown in Figure 3, judge that this frequency band exists the gentle stream stall zone of different sound; The guide plate 7 of arc is set above the blower fan placement section 6 of spiral case to this part area of air-flow exhaust outlet 4, the position of guide plate 7 should meet 1.14≤a/c≤1.18,3.19≤b/c≤5.93,30 °≤α≤70 °, α < β < 90 °, best with a/c=1.16, b/c=4.56, α=44.5 °, β=68 ° gas-tight loss effect.
Compare stall zone S area in Fig. 1 as stall zone S area in Fig. 6 greatly to reduce, can calculate from Fig. 7 spectrogram simultaneously and compare the concrete numerical values recited that 250-300Hz and 450-520Hz frequency band sound pressure level exceeds d value and be down to less than 5 decibels, namely spiral case air-out is even, avoid the generation of air-flow stall event and reduce different sound, optimize overall performance, improve comfort.
Based on technique scheme, optionally, the concrete size of guide plate 7 can make the appropriate adjustments according to different operating mode, but with its length L scope 60-80mm, width W scope 3-9mm, height H scope 10-80mm is advisable, as shown in Figure 10.
Certainly, in the present embodiment, guide plate 7 can be also other shapes, as lineal shape plate or trapezoidal plate etc.
Embodiment two
With above-described embodiment unlike, the present embodiment medium frequency section 250-300Hz sound pressure level exceeds d value 8 decibels, now adopt the cabinet-type air conditioner spiral case being provided with guide plate 7, the position of guide plate 7 should meet 1.14≤a/c≤1.18,1.35≤b/c≤1.6,30 °≤α≤70 °, best with a/c=1.16, b/c=1.53, α=44.5 °, β=68 ° gas-tight loss effect.
Compare stall zone S area in Fig. 1 as stall zone S area in Fig. 8 greatly to reduce, can calculate from Fig. 9 simultaneously and compare the concrete numerical values recited that 250-300Hz frequency band sound pressure level exceeds d value and be down to less than 5 decibels, namely spiral case air-out is even, avoid the generation of air-flow stall event and reduce different sound, optimize overall performance, improve comfort.
The above is only preferred embodiment of the present invention, and be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solution of the present invention content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (6)
1. cabinet-type air conditioner spiral case gas-tight runs off a method for speed, and described spiral case has the base plate, the first side plate of base plate both sides and the second side plate that surround air-flow exhaust outlet, and the snail tongue of spiral case is positioned on the first side plate, it is characterized in that comprising the steps:
1) spiral case air-flow stall zone is determined, noise measuring is carried out to cabinet-type air conditioner complete machine, obtain frequency-sound pressure level frequency spectrum figure, calculate the A weighted sound pressure level d of whole frequency band, if the sound pressure level that there is certain frequency band P in whole frequency band exceeds d value more than 5 decibels, judging that this frequency band P exists different sound, there is air-flow stall zone in spiral case;
2) in air-flow stall zone, namely the top of spiral case blower fan placement section arranges guide plate to this part area of air-flow exhaust outlet, and the base plate that guide plate is connected to spiral case extends along air-flow air-out direction, and the angle of attack formed between its front end and air-flow air-out direction is zero.
2. the method for cabinet-type air conditioner spiral case gas-tight loss speed according to claim 1, is characterized in that: the perpendicular distance of the front end distance blower fan placement section horizontal center line of described guide plate is a, the perpendicular distance of rear end distance blower fan placement section horizontal center line is b, between the snail tongue of spiral case and the second side plate, minimum range is c; When the sound pressure level of frequency band P exceed d value be greater than 10 decibels time, the position of adjustment guide plate makes 1.14≤a/c≤1.18,3.19≤b/c≤5.93, when the sound pressure level of frequency band P exceeds d value 5-10 decibel, the position of adjustment guide plate makes 1.14≤a/c≤1.18,1.35≤b/c≤1.6.
3. the method for cabinet-type air conditioner spiral case gas-tight loss speed according to claim 2, it is characterized in that: described guide plate is arc plate, its outer side surface starting point tangent line and substantially horizontal angle are α, except starting point, any point place tangent line and substantially horizontal angle are β, 30 °≤α≤70 ° and α < β < 90 °.
4. the method for cabinet-type air conditioner spiral case gas-tight loss speed according to claim 1, is characterized in that: the length range of described guide plate is 60-80mm, and width range is 3-9mm, and altitude range is 10-80mm.
5. the method for the cabinet-type air conditioner spiral case gas-tight loss speed according to claim 2 or 4, is characterized in that: described guide plate is lineal shape plate or trapezoidal plate.
6. the method for cabinet-type air conditioner spiral case gas-tight loss speed according to claim 1, is characterized in that: described frequency band P is 250-300Hz and/or 450-520Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310630324.9A CN104675754B (en) | 2013-12-02 | 2013-12-02 | The method that cabinet-type air conditioner spiral case gas-tight is lost in speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310630324.9A CN104675754B (en) | 2013-12-02 | 2013-12-02 | The method that cabinet-type air conditioner spiral case gas-tight is lost in speed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104675754A true CN104675754A (en) | 2015-06-03 |
| CN104675754B CN104675754B (en) | 2017-11-07 |
Family
ID=53311217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310630324.9A Active CN104675754B (en) | 2013-12-02 | 2013-12-02 | The method that cabinet-type air conditioner spiral case gas-tight is lost in speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104675754B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017128958A1 (en) * | 2016-01-29 | 2017-08-03 | 青岛海尔洗衣机有限公司 | Clothes dryer |
| CN109958659A (en) * | 2019-03-10 | 2019-07-02 | 江苏大学镇江流体工程装备技术研究院 | A kind of centrifugal pump with flow-guiding structure |
| WO2023103121A1 (en) * | 2021-12-08 | 2023-06-15 | Tcl空调器(中山)有限公司 | Volute casing, air passage assembly, and air conditioner |
| WO2023103123A1 (en) * | 2021-12-08 | 2023-06-15 | Tcl空调器(中山)有限公司 | Volute structure, air duct assembly and air conditioner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61207898A (en) * | 1985-03-12 | 1986-09-16 | Matsushita Electric Ind Co Ltd | Electric blower |
| CN2535590Y (en) * | 2001-12-30 | 2003-02-12 | 王基晨 | Low-noise centrifugal fan |
| CN101307778A (en) * | 2007-05-18 | 2008-11-19 | 乐金电子(天津)电器有限公司 | Centrifugal fan assembled guide vane vortex tongue structure |
-
2013
- 2013-12-02 CN CN201310630324.9A patent/CN104675754B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017128958A1 (en) * | 2016-01-29 | 2017-08-03 | 青岛海尔洗衣机有限公司 | Clothes dryer |
| CN109958659A (en) * | 2019-03-10 | 2019-07-02 | 江苏大学镇江流体工程装备技术研究院 | A kind of centrifugal pump with flow-guiding structure |
| WO2023103121A1 (en) * | 2021-12-08 | 2023-06-15 | Tcl空调器(中山)有限公司 | Volute casing, air passage assembly, and air conditioner |
| WO2023103123A1 (en) * | 2021-12-08 | 2023-06-15 | Tcl空调器(中山)有限公司 | Volute structure, air duct assembly and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104675754B (en) | 2017-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104675754A (en) | Cabinet volute airflow stalling preventing method | |
| Velarde-Suárez et al. | Reduction of the aerodynamic tonal noise of a forward-curved centrifugal fan by modification of the volute tongue geometry | |
| CN203641114U (en) | Cabinet machine volute capable of preventing airflow from stalling | |
| CN206755301U (en) | A kind of noise reduction range hood | |
| CN203642431U (en) | Cabinet volute and cabinet air conditioner | |
| CN104454648B (en) | Volute, low-noise centrifugal fan and air conditioner | |
| JP5923690B2 (en) | Range food | |
| KR20150054674A (en) | Centrifugal fan | |
| CN205002265U (en) | Air purifier | |
| CN109882452A (en) | A kind of radiator fan denoising device and its method based on acoustics cut-off | |
| EP2484981A1 (en) | Suction apparatus | |
| CN203570691U (en) | Diffuser for centrifugal ventilators and motor | |
| JP6503552B2 (en) | Active silencer and blower provided with the same | |
| JP2017068231A (en) | Blower | |
| CN203670270U (en) | Cross-flow impeller, cross-flow fan and wall-mounted air conditioner | |
| Čudina et al. | Noise generation by vacuum cleaner suction units: Part II. Effect of vaned diffuser on noise characteristics | |
| CN201843837U (en) | Mute type air conditioning fan | |
| CN110185640B (en) | Centrifugal fan and household appliance | |
| JP2017129322A (en) | Air blowing device | |
| JP6236628B2 (en) | Active silencer | |
| JP6191005B2 (en) | Ventilation fan | |
| CN211176963U (en) | Fan and lampblack absorber | |
| CN203797889U (en) | Volute and air conditioner with same | |
| JP6439139B2 (en) | Blower | |
| JP2008051414A (en) | Interior unit for air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |