CN202789701U - Low-noise wall-mounted air-conditioner and cross-flow fan thereof - Google Patents
Low-noise wall-mounted air-conditioner and cross-flow fan thereof Download PDFInfo
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- CN202789701U CN202789701U CN 201220370025 CN201220370025U CN202789701U CN 202789701 U CN202789701 U CN 202789701U CN 201220370025 CN201220370025 CN 201220370025 CN 201220370025 U CN201220370025 U CN 201220370025U CN 202789701 U CN202789701 U CN 202789701U
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- flow fan
- cross flow
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- tubular wine
- snail tongue
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Abstract
The utility model is applicable to air conditioning equipment and provides a cross-flow fan used for a wall-mounted air-conditioner. The cross-flow fan comprises a cross-flow fan wind wheel, a water collection tray and a plurality of volute tongues successively arranged on the water collection tray, wherein each volute tongue is obliquely arranged towards the cross-flow wind fan relative to the axial direction of the cross-flow wind fan. Due to the obliquely arranged volute tongues in the cross-flow fan, gaps between the cross-flow wind wheel and the volute tongues is changed, resonant noise caused by superposition of same frequencies is avoided, and meanwhile, wake flow effect caused by interference between blades of the cross-flow wind wheel and the volute tongues is alleviated, so that noise of the air-conditioner is further lowered, and comfort quality of the air-conditioner is improved. The utility model further provides a low-noise wall-mounted air-conditioner comprising a case body, a heat exchanger, an air inlet, an air outlet, and the cross-flow fan mounted on the case body. The air-conditioner is low in noise and good in utilization comfortability during running.
Description
Technical field
The utility model belongs to the air conditioner field, relates in particular to a kind of low noise wall-hanging air conditioner and cross flow fan thereof.
Background technique
Wall-hanging air conditioner is widely used cross flow fan as the air-supply parts.Noise during the wall-hanging air conditioner operation mainly is the aerodynamic noise that cross flow fan produces, and the aerodynamic noise that cross flow fan produces can be divided into turbulence noise and rotational noise.
The formation reason of turbulence noise is a lot, and the incompressible dimensionless root mean square fluctuation pressure of adhering to turbulent boundary layer that is obtained by great many of experiments is: σ/pt=0.006; The dimensionless root mean square fluctuation pressure of incompressible expansion separated flow is: σ/pt=0.045; σ is dimensionless root mean square fluctuation pressure in the formula; Pt=1/2* ρ * v^2 is dynamic head, and ρ is air density in the formula, and v is air velocity.Above empirical correlation shows that the turbulence noise of blower fan is directly proportional with dynamic head.And the air quantity formula has: q=v*A, A is the flow section area in the formula.Therefore air quantity increases, and corresponding dynamic head increases, and turbulence noise can strengthen.
See also Fig. 1, the snail tongue 21 of existing wall-hanging air conditioner is installed on the water receiving disc 22.Rotational noise is when going out impeller channel because of gas flow, at the noise of outlet port and the 21 collision generations of blower fan snail tongue.The sound output of this noise depend between snail tongue 21 and the tubular wine wheel distance and when bump blade length.The distance that increases between snail tongue 21 and the tubular wine wheel can reduce rotational noise effectively, but the increase of the distance between snail tongue 21 and the tubular wine wheel can reduce compressor flow simultaneously, therefore, the measure that reduces rotational noise by increasing distance between snail tongue 21 and the tubular wine wheel is subject to the restriction of flow factor.The spectrum signature of rotational noise is: locate by frequency (being fundamental frequency f1) and the integral multiple (being harmonics) thereof of snail tongue at tubular wine wheel, the sound intensity level is obviously much higher than other frequency place, and at the f1 place, peak value is the highest especially.When ambient noise is low (as in the night), the fundamental frequency noise can be painful.
The model utility content
The purpose of this utility model is to provide a kind of cross flow fan, the large problem of noise when being intended to solve current wall-hanging air conditioner running.
The utility model is to realize like this, a kind of cross flow fan, be used for wall-hanging air conditioner, described cross flow fan comprises tubular wine wheel, water receiving disc and is arranged at continuously some joint snail tongues on the described water receiving disc that every joint snail tongue is obliquely installed towards described tubular wine wheel with respect to described tubular wine wheel axial direction.
Further, every joint snail tongue is spent greater than 0 degree and less than or equal to 5 with respect to the absolute value at described tubular wine wheel axial direction angle of inclination.
Preferably, the absolute value at described angle of inclination is 3 degree.
Further, every joint snail tongue is identical along described tubular wine wheel axial direction angle of inclination.
Further, every joint snail tongue is different along described tubular wine wheel axial direction angle of inclination.
Further, described tubular wine wheel comprises that at least three joints save in the wind wheels, and joint is h along described tubular wine wheel axial length in every joint wind wheel, and the scope of every joint snail tongue length L is: 0.2h≤L≤3h.
Preferably, every joint snail tongue length is identical, every joint snail tongue length L=1h.
Particularly, the described snail tongue length difference that respectively saves.
By described some snail tongues that is obliquely installed are set in cross flow fan, thereby changed the size of tubular wine wheel and snail tongue gap, so that along each the blade base segment on the axial direction (being described tubular wine wheel rotation centerline) of tubular wine wheel and the noise of snail tongue interaction institute output certain phase difference is arranged, the resonance noise of having avoided the same frequency stack to bring, thereby reduced the tubular wine wheel rotational noise.Simultaneously, the snail tongue has also alleviated interference effect between tubular wine wheel blade and the snail tongue and the wake effect of output after tilting.And then the reduction air-conditioning noise, the travelling comfort quality of raising air-conditioning.
Another purpose of the present utility model is to provide a kind of low noise wall-hanging air conditioner, comprise casing, be installed on heat exchanger in the described casing, be arranged at the intake grill on the described casing and be arranged at exhaust outlet on the described casing, aforesaid cross flow fan is installed in the described casing.
Further, described low noise wall-hanging air conditioner also comprises the air-guiding strip that is installed on described exhaust outlet place.
During described air conditioner running, noise is low, and comfort is good.
Description of drawings
Fig. 1 is the perspective view of the water receiving disc of the cross flow fan that provides of prior art.
Fig. 2 is the perspective view of the water receiving disc of the cross flow fan that provides of the utility model embodiment.
Fig. 3 is the partial enlarged drawing of circle part among Fig. 2.
Fig. 4 is the perspective view of the cross flow fan that provides of the utility model embodiment, comprising water receiving disc shown in Figure 2.
Fig. 5 is that the cross flow fan of Fig. 4 is along the cross-sectional schematic of K-K line.
Fig. 6 is the partial enlarged drawing of circle part among Fig. 4.
Fig. 7 is the perspective view of tubular wine wheel of the cross flow fan of Fig. 4.
Fig. 8 is the cross-sectional schematic of the low noise wall-hanging air conditioner that provides of the utility model embodiment.
Fig. 9 is the partial enlarged drawing of circle part among Fig. 8.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
In order to reduce the running noises of cross flow fan, numerous engineers and researcher have worked out the resultful scheme of part from the impeller of blower assistant, comprise from initial prismatic blade equidistantly distributing, develop into that prismatic blade does not equidistantly distribute, dihedral vane, oblique twisted blade tubular wine wheel.
There is very large randomness in the Leaf positional distribution of tubular wine wheel of not being equally spaced, and its noiseproof feature usually can not be estimated very accurately, and the design time cycle is long, the expense height.
Dihedral vane and tiltedly the twisted blade tubular wine wheel is with respect to the prismatic blade wind wheel, its cost of production is higher, and processing speed is slow, and up-to-standard rate is low, and when the river rises the boat goes up thereby cause the cost of wind wheel, finally increases the cost of air conditioner.
The another kind of mode that provides the utility model reduces the air conditioner noise in when running, namely reduces the running noise of air conditioner by the structure that changes the snail tongue.
See also Fig. 2 to Fig. 9, the utility model embodiment discloses a kind of low noise wall-hanging air conditioner, comprise casing 11, be installed on heat exchanger 12 in the described casing 11, be arranged at the intake grill 13 on the described casing 11 and be arranged at exhaust outlet 14 on the described casing 11, in the described casing 11 cross flow fan 15 is installed also.Described cross flow fan 15 comprises tubular wine wheel 151, water receiving disc 153 and is arranged at continuously some joint snail tongues 154 on the described water receiving disc 153 that every joint snail tongue 154 is obliquely installed towards described tubular wine wheel 151 with respect to described tubular wine wheel 151 axial directions.
This air conditioner is by arranging described some snail tongues 154 that is obliquely installed in cross flow fan 15, to change the frequency of air-flow and 154 collisions of blower fan snail tongue, frequency (be fundamental frequency f1) and the integral multiple (be harmonics) thereof of air-flow by snail tongue 154 had modulating action, ripple to any one frequency, no longer has significant noise summit, but noise energy is spread in the wider frequency band, thereby the noise when reducing the air conditioner running.In the present embodiment, the noise when reducing the running of air conditioner by changing snail tongue 154 structures also has simple in structure, production technology is controlled, cost is low, and these snail tongue 154 structures can also cooperate prismatic blade 152 structure tubular wine wheels 151 simultaneously, the cost that indirectly reduces.
In the present embodiment, by described some snail tongues 154 are obliquely installed along described tubular wine wheel 151 axial directions, make the gap of the described tubular wine wheel 151 of described snail tongue 154 distances different, so that different from the frequency of described snail tongue 154 each positions collision from the air-flow of described cross flow fan 15 outflows, be difficult to form unified harmonics, that is: noise energy is spread in the wider frequency band noise when turning round to reduce air conditioner.
Please specifically consult Fig. 3, Fig. 6 and Fig. 9, in the present embodiment, some snail tongues 154 are tilted, the edge m of the outer surface that links to each other of two adjacent snail tongues 154, n is not on the same face, and it is staggeredly located out, with stepped.The gap d 1 of the described tubular wine wheel 151 of described edge m distance is unequal with the gap d 2 of the described tubular wine wheel 151 of described edge n distance, i.e. d1 ≠ d2.Thereby changed the size of tubular wine wheel 151 with snail tongue 154 gaps, so that along each blade 152 base segment on the axial direction (being described tubular wine wheel 151 rotation centerlines) of tubular wine wheel 151 and the noise of snail tongue 154 interactions institute output certain phase difference is arranged, the resonance noise of having avoided the same frequency stack to bring, thereby reduced tubular wine wheel 151 rotational noises.Simultaneously, after snail tongue 154 tilts, also alleviated interference effect between the blade 152 of tubular wine wheel 151 and the snail tongue 154 and the wake effect of output.And then the reduction air-conditioning noise, the travelling comfort quality of raising air-conditioning.Described snail tongue 154 is cascade and distributes, and has guaranteed that the radial clearance of snail tongue 154 tubular wine wheels 151 axially can not be enlarged to invalid scope along tubular wine wheel 151.
Further, please again consult Fig. 2 to Fig. 7, in the present embodiment, every joint snail tongue 154 is spent greater than 0 degree and less than or equal to 5 with respect to the absolute value at described tubular wine wheel 151 axial direction angles of inclination.Preferably, the absolute value at described angle of inclination is 3 degree.Described tubular wine wheel 151 comprises that at least three joints save in the wind wheels, and joint is h along described tubular wine wheel 151 axial lengths in every joint wind wheel, and the scope of every joint snail tongue 154 length L is: 0.2h≤L≤3h.Preferably, every joint snail tongue 154 length are identical, every joint snail tongue 154 length L=1h.
Described snail tongue 154 is simple in structure, and production technology is controlled, and cost is low, and this structure can also cooperate prismatic blade 152 structure tubular wine wheels 151 simultaneously, to reduce the cost of cross flow fan 15 assemblies.
In the present embodiment, design a 32G low noise wall-hanging air conditioner, described low noise wall-hanging air conditioner is equipped with above-mentioned cross flow fan 15, and every joint snail tongue 154 tilts with equal angular along described tubular wine wheel 151 axial directions, choosing the angle of inclination is 3 degree, gets every joint snail tongue 154 length L=1h.Compare when the running of the 32G low noise wall-hanging air conditioner that designs in the present embodiment and existing 32G wall-hanging air conditioner is installed, obtain following laboratory data:
As seen from the above table, the low noise wall-hanging air conditioner of present embodiment is in the contrast of high, medium and low third gear and relative existing wall-hanging air conditioner, and the noise during running all has the decline about 3dB (A); Simultaneously, power also descends to some extent, and is namely more energy-conservation; Then maintain an equal level mutually on the ventilation: in, low-grade air quantity has 2m
3The increase of/h only has 2m on the high wind shelves
3The decline of/h.
In other embodiments, every joint snail tongue 154 can be got 3 degree such as the angle of inclination of a snail tongue 154 with different angles of inclination along described tubular wine wheel 151 axial directions, and another angle is got-3 degree etc.; The length of each snail tongue 154 also can be made into not identical, and namely a joint snail tongue 154 length are relatively long, and another joint is relatively short; Also can make the gap of the described tubular wine wheel 151 of described snail tongue 154 distances different, so that different from the frequency of described snail tongue 154 each positions collision from the air-flow of described cross flow fan 15 outflows, be difficult to form unified harmonics, thereby noise energy is spread in the wider frequency band noise when turning round to reduce air conditioner.
Further, described low noise wall-hanging air conditioner also comprises the air-guiding strip 141 that is installed on described exhaust outlet 14 places.To change the direction of low noise wall-hanging air conditioner air-out.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. cross flow fan, be used for wall-hanging air conditioner, described cross flow fan comprises tubular wine wheel and water receiving disc, it is characterized in that: described cross flow fan also comprises the some joint snail tongues that are arranged at continuously on the described water receiving disc, and every joint snail tongue is obliquely installed towards described tubular wine wheel with respect to described tubular wine wheel axial direction.
2. cross flow fan as claimed in claim 1 is characterized in that: every joint snail tongue with respect to the absolute value at described tubular wine wheel axial direction angle of inclination greater than 0 degree and less than or equal to 5 degree.
3. cross flow fan as claimed in claim 2 is characterized in that: the absolute value at described angle of inclination is 3 degree.
4. cross flow fan as claimed in claim 1, it is characterized in that: every joint snail tongue is identical along described tubular wine wheel axial direction angle of inclination.
5. cross flow fan as claimed in claim 1 is characterized in that: every joint snail tongue is different along described tubular wine wheel axial direction angle of inclination.
6. such as each described cross flow fan of claim 1-5, it is characterized in that: described tubular wine wheel comprises that at least three joints save in the wind wheels, and joint is h along described tubular wine wheel axial length in every joint wind wheel, and the scope of every joint snail tongue length L is: 0.2h≤L≤3h.
7. cross flow fan as claimed in claim 6, it is characterized in that: every joint snail tongue length is identical, every joint snail tongue length L=1h.
8. cross flow fan as claimed in claim 6 is characterized in that: the described snail tongue length difference that respectively saves.
9. low noise wall-hanging air conditioner, comprise casing, be installed on heat exchanger in the described casing, be arranged at the intake grill on the described casing and be arranged at exhaust outlet on the described casing, it is characterized in that: be equipped with in the described casing such as the described cross flow fan in the arbitrary top of claim 1-8.
10. low noise wall-hanging air conditioner as claimed in claim 9, it is characterized in that: described low noise wall-hanging air conditioner also comprises the air-guiding strip that is installed on described exhaust outlet place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220370025 CN202789701U (en) | 2012-07-27 | 2012-07-27 | Low-noise wall-mounted air-conditioner and cross-flow fan thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220370025 CN202789701U (en) | 2012-07-27 | 2012-07-27 | Low-noise wall-mounted air-conditioner and cross-flow fan thereof |
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| Publication Number | Publication Date |
|---|---|
| CN202789701U true CN202789701U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220370025 Expired - Fee Related CN202789701U (en) | 2012-07-27 | 2012-07-27 | Low-noise wall-mounted air-conditioner and cross-flow fan thereof |
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| CN (1) | CN202789701U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864991A (en) * | 2016-05-31 | 2016-08-17 | 珠海格力电器股份有限公司 | Air duct structure and air conditioner |
-
2012
- 2012-07-27 CN CN 201220370025 patent/CN202789701U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864991A (en) * | 2016-05-31 | 2016-08-17 | 珠海格力电器股份有限公司 | Air duct structure and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20200727 |