CN1057596C - Air conditioner and through-flow incorporated therein - Google Patents
Air conditioner and through-flow incorporated therein Download PDFInfo
- Publication number
- CN1057596C CN1057596C CN 94113719 CN94113719A CN1057596C CN 1057596 C CN1057596 C CN 1057596C CN 94113719 CN94113719 CN 94113719 CN 94113719 A CN94113719 A CN 94113719A CN 1057596 C CN1057596 C CN 1057596C
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- blade
- flow
- fan
- noise
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- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
Abstract
To reduce the level of noise, produced by the rotation of a cross flow fan, for which the number of its blades and the number of the revolutions are responsible, while maintaining the volume of air flow, by bending more deeply the arcuately peripheral outer side of the fan blade. Although the mounting angle theta of the blade 11 of a cross flow fan 12 is the same as that formed conventionally, the end part on its outer peripheral side is bent by a dimension 1 through an angle alpha. By the selection of the optimum dimension and angle for such a fan device, as for the air flow characteristic, the conventional flow volume can be maintained and, as to the noise characteristic, the level of noises produced by the fan rotation becomes 5dB and thus can be made lower than the conventional noise level by 8dB. This can reduce the level of noise, produced by the rotation of the cross flow fan 12, for which the number of its blades 11 and the number of the revolution are responsible, while maintaining the volume of air flow.
Description
The present invention puts it briefly and relates to a kind of air regulator, particularly the ventilation plant of air device.Or rather, the present invention relates to the through-flow incorporated therein that a kind of flow and noise characteristic all are improved, and the air regulator that this through-flow incorporated therein is installed.
Following with reference to traditional air regulator and the shortcoming thereof of accompanying drawing narration.
Fig. 7 shows a kind of known structure that the air regulator of traditional through-flow incorporated therein is housed, and shows air flow channel in the drawings.From this figure, can clearly be seen that, constituted the upstream and downstream runner of through-flow incorporated therein 2 by means of protuberance 3 and housing 4 with several blades 1.Suction grille 5 and heat exchanger 6 are arranged on the suction side of through-flow incorporated therein 2, and shown in arrow among Fig. 7, the discharge directions of through-flow incorporated therein can be opposite with airintake direction.In addition, air mass flow can increase by proportional big amplitude variation with the increase of the axial length of fan, and like this, the axial length that increases or reduce fan simply can obtain any needed air mass flow.Because this never by the special performance that fan replaced of other type, it is very extensive that this through-flow incorporated therein is used in recent years always.
People have done various trials in order to improve flow and the noise characteristic that goes up this class air regulator.Think that the flow of through-flow incorporated therein and noise characteristic are subjected to the influence of established angle θ of fan propeller upper blade very big.Particularly, angle θ is defined as, and the fan propeller center is connected with each blade radial outer end and outside the straight line and blade radial that form, and the inner is connected and angle between the straight line that forms.Usually, by reducing the problem that above-mentioned angle θ can solve needs big air mass flow.People have also done such trial, and the spacing of radiating fin on pitch by increasing suction grille 5 and the heat exchanger 6 is optimized the shape of air outlet slit and reduced air flow resistance and improve flow and noise characteristic.
Disclose a kind of like this exemplary of improved air regulator in Japanese unexamined patent publication 2-203129 number.This improved air regulator has a stabilizer, and this stabilizer and through-flow incorporated therein arrange that at interval wherein the distance between through-flow incorporated therein and the stabilizer little by little changes along the axis of through-flow incorporated therein.
The problem that this known air regulator ran into shown in Figure 7 is to reduce blade angle θ, though can improve Flow characteristics significantly, but weakened noise characteristic, when frequency was n * Z (n is a rotation speed of the fan, and Z represents the fan blade number), the noise peak-peak can appear.
Therefore, when definite blade angle θ, must to keep reducing of noise on the one hand, also need to keep the increase of air mass flow on the other hand, still, satisfy simultaneously that to reduce noise figure and improve these two kinds of requirements of air mass flow be impossible.
It is too complicated and be difficult for the problem that realizes that unexamined Japanese patent gazette 2-203129 number disclosed improved air regulator also run into stabilizer structure.In most of the cases, stabilizer and exhaust base are whole to be constituted, like this, and owing to the complex-shaped structure shape of mould that makes of stabilizer is complicated.Therefore, need as much as possible stabilizer and exhaust base to be separated making, and then fit together, but take this measure, can improve the cost of production of air regulator, this is undesirable.
Therefore, main purpose of the present invention provides a kind of air regulator with through-flow incorporated therein, and the through-flow incorporated therein of this air regulator can move under low noise operating mode under the prerequisite that does not reduce air mass flow.
In order to realize this purpose, according to the present invention, provide a kind of air regulator, it comprises
One protuberance and a housing, both are in conjunction with the air upstream and downstream runner that forms around a through-flow incorporated therein; And the suction grille and the heat exchanger that are arranged on the intakeport of described runner, it is characterized in that be provided with a plurality of blades, each blade is a circular arc, stretch to outer circumferential side from the center line of described through-flow incorporated therein; Described blade is crooked at outer circumferential side near its place, end.
According to the present invention,, therefore, when having kept the intrinsic air mass flow of fan, reduced noise peak widely in lobe numbers and the generation of the pairing Frequency point of rotation speed of the fan product place owing to improved the shape of through-flow incorporated therein blade.
Above and other objects of the present invention, characteristics and advantage in conjunction with the accompanying drawings can be clear by following most preferred embodiment.
Fig. 1 is the generalized section of air regulator of the present invention;
Fig. 2 is the sectional drawing of through-flow incorporated therein blade of the present invention;
Fig. 3 is a frequency--the noise characteristic curve, expressed the effect that the present invention produced.
Fig. 4 is the plotted curve that the relative blade radial with noise of air mass flow outer end vane curvature changes;
Fig. 5 is the graph of relation between the bending length of through-flow incorporated therein air mass flow and blade;
Fig. 6 is an improved through-flow incorporated therein front schematic view of the present invention, and blade is distorted shape along the fan axis among the figure;
Fig. 7 is a kind of generalized section of known air regulator;
Fig. 8 is a known air regulator noise characteristic plotted curve shown in Figure 7.
The structure of the air regulator of the present invention that through-flow incorporated therein is installed has been shown among Fig. 1, and this also is embodiments of the invention, air flow channel shown in this figure.From Fig. 1, can clearly be seen that,, constituted and have if in the upstream and downstream runner of the through-flow incorporated therein 12 of individual blade 11 by protuberance 3 and housing 4.Suction grille 5 and heat exchanger 6 are arranged on the suction side of through-flow incorporated therein 12.
Blade 11 is installed on the fan 12 with the fixed angle identical with conventional fan shown in Figure 7.The shape of blade 11 is except its radial outer end portion, remaining part is identical with the blade shape of conventional fan, promptly according to the present invention, length is that the radial outer end portion of the blade 11 of L becomes curved shape, and this curved section is the α angle with respect to the plane of this length initial point place tangent plate shape in the outer end.Therefore, connect in the blade radial, formed blade angle θ ' between the straight line of outer end and the straight line that is connected fan propeller center and blade radial outer end is greater than the established angle of conventional fan blade shown in Fig. 7 θ.
According to the present invention, by selecting the size of suitable length and angle α, can under the prerequisite that does not reduce air mass flow, reduce noise, as shown in Figure 3, noise has been reduced 8 decibels and reduce to 25 decibels.Like this might be when keeping needed air mass flow, and reduce the noise of through-flow incorporated therein, therefore eliminated user's worry.
Fig. 4 shows the air mass flow of through-flow incorporated therein and the situation that noise changes with angle α.More particularly, in Fig. 4, Y axis Y is represented air mass flow and noise figure, and axis of abscissa is represented the bend ratio of blade radial outer end, with the ratio (α/θ) expression of angle α with the established angle θ of blade installation on fan propeller.When the bend angles alpha of blade radial outer end is zero, promptly when the shape of the shape of blade and traditional through-flow incorporated therein blade is identical, the air mass flow maximum.But, the fan of this shape, its noise figure maximum.(increase of α/θ) can make noise figure reduce to bend ratio, but will inevitably bring reducing of air mass flow.
Obviously, the reduction for the noise that makes through-flow incorporated therein reduces and don't can bring air mass flow significantly should preferably be chosen in the bending angle of blade tip the scope that ratio cc/θ is 0.35-0.55.
Fig. 5 show air mass flow and with the length l of bending blade part to the relation between the bending blade partial-length of ratio (l/L) expression of blade total length L (referring to Fig. 2).When ratio l/L surpassed 0.17, air mass flow can reduce significantly, and when ratio l/L less than 0.1 the time, processing of leaves is just very difficult.Therefore, the bending length of blade radial outer end is preferably selected like this with respect to the total length L of blade, and the scope of ratio l/L is decided to be 0.1-0.7.
Fig. 6 shows a kind of improvement of the present invention, and wherein blade 11 twists along the fan axis.This improved structure reduces the noise component(s) value at some Frequency point places so effectively, and these Frequency points are not the products of lobe numbers and rotation speed of the fan.
Be appreciated that by above-mentioned, according to the present invention, blade will be made such shape, the radial outer end portion that makes the one predetermined length is curved shape with respect to the remaining part of blade, and the remaining part of blade begins bending from the end that is close to the fan axis, like this, can not reduce air mass flow, need not be provided with under the situation of complicated shape stabilizer and protuberance, can reduce noise peak effectively, air regulator is moved under stable operating mode by the long-pending pairing Frequency point place appearance of rotation speed of the fan and lobe numbers.If the noise peak of known air regulator allows, so, air regulator of the present invention can turn round under the operating mode that air mass flow increases, and like this, has increased the air-conditioning effect.
Claims (4)
1. air regulator, it comprises: a protuberance and a housing, both are in conjunction with the air upstream and downstream runner that forms around a through-flow incorporated therein; And the suction grille and the heat exchanger that are arranged on described runner intakeport, it is characterized in that be provided with a plurality of blades, each blade is a circular arc, stretch to outer circumferential side from the center line of described through-flow incorporated therein; Described blade is crooked at outer circumferential side near its place, end.
2. air regulator as claimed in claim 1 is characterized in that, the curved section of described blade is towards the center curvature of described circular arc.
3. air regulator as claimed in claim 1 or 2, it is characterized in that, the bend angle of described blade be this blade major component of removing its radial outer end portion setting angle 0.35-0.55 doubly, the length of the radial outer end portion of described bending be distance between the radial outer end of described blade and the inner 0.1-0.17 doubly.
4. air regulator as claimed in claim 1 or 2, its feature, described blade is along the axis distortion of described through-flow incorporated therein.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP225434/1993 | 1993-09-10 | ||
| JP22543493A JP3329015B2 (en) | 1993-09-10 | 1993-09-10 | Air conditioner |
| JP225434/93 | 1993-09-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1106125A CN1106125A (en) | 1995-08-02 |
| CN1057596C true CN1057596C (en) | 2000-10-18 |
Family
ID=16829314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94113719 Expired - Fee Related CN1057596C (en) | 1993-09-10 | 1994-09-10 | Air conditioner and through-flow incorporated therein |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3329015B2 (en) |
| CN (1) | CN1057596C (en) |
| MY (1) | MY112401A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323631C (en) * | 2004-02-03 | 2007-07-04 | Lg电子株式会社 | Air-blowing apparatus of cleaner |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006152886A (en) * | 2004-11-26 | 2006-06-15 | Toshiba Kyaria Kk | Cross-flow fan, and indoor unit of air conditioner |
| JP5269036B2 (en) * | 2010-11-08 | 2013-08-21 | 三菱電機株式会社 | Cross-flow fan and air conditioner equipped with the same |
| CN105971909B (en) * | 2016-05-05 | 2019-01-11 | 江苏汉威燃烧科技有限公司 | Through-flow blower unit and through-flow electric appliance |
| CN105971908B (en) * | 2016-05-05 | 2018-07-06 | 四川圣锦高新科技股份有限公司 | A kind of noise reduction draft mechanism and through-flow electric appliance |
| CN109612056B (en) * | 2018-12-19 | 2021-06-11 | 创维空调科技(安徽)有限公司 | Air deflector control method and device and computer readable storage medium |
| CN110553399B (en) * | 2019-07-17 | 2021-07-20 | 珠海格力电器股份有限公司 | Cross flow air duct assembly and fan heater |
| CN112524093A (en) * | 2019-09-17 | 2021-03-19 | 广东美的环境电器制造有限公司 | Air guide assembly and air supply device |
-
1993
- 1993-09-10 JP JP22543493A patent/JP3329015B2/en not_active Expired - Fee Related
-
1994
- 1994-09-07 MY MYPI94002339A patent/MY112401A/en unknown
- 1994-09-10 CN CN 94113719 patent/CN1057596C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323631C (en) * | 2004-02-03 | 2007-07-04 | Lg电子株式会社 | Air-blowing apparatus of cleaner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3329015B2 (en) | 2002-09-30 |
| MY112401A (en) | 2001-06-30 |
| CN1106125A (en) | 1995-08-02 |
| JPH0783459A (en) | 1995-03-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |