Cross-flow fan

A cross-flow fan and cross-flow wind wheel technology, which is applied in the direction of mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of increased noise and easy to become harsh sounds, etc., to improve aerodynamic noise and suppress end wall corners Vortex, the effect of improving sound quality

Inactive Publication Date: 2009-03-04
GUANGDONG MIDEA ELECTRIC APPLIANCES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the vicinity of the volute tongue, it is easy to generate consistent (trend) pressure pulsation in the axial direction of the conventional wind wheel, so it is easy to generate large high-order harmonic components. If this harmonic is included in t

Method used

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Examples

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Embodiment

[0020] The structural diagram of the cross-flow fan duct for air conditioning is as follows: figure 1 As shown, there is an air intake grille 15 provided at the air inlet, and a chassis 12 is connected to the air intake grille, and a folded strip evaporator 16 supported by the chassis is provided near the air intake grille 15 . The air entering from the air intake grille 15 passes through the strip-shaped evaporator, crosses the cross-flow fan 11, and is guided by the louver deflector 14 to the indoor environment. The air outlet frame 13 and the air deflector support bar 14 are arranged at the position close to the wind wheel connected with the louver air deflector, and the cross-flow fan 11 includes a cross-flow wind wheel 21, a chassis volute 22, and an air outlet frame volute, wherein the chassis volute The cross-sectional shape of the shell includes the chassis drainage line 1, the rear guide volute curve 2 and the chassis air outlet profile 3, the cross-sectional shape of...

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Abstract

The present invention relates to a cross flow fan. The cross flow fan comprises a cross flow wind wheel, a chassis scroll casing and an outtake-frame scroll casing; wherein, the sectional shape of the chassis scroll casing comprises a chassis drainage line, a rear guiding scroll casing curve and a chassis air outlet-shaped line; the sectional shape of the outtake-frame scroll casing comprises a scroll casing tongue part and a front guiding scroll casing curve; and the distance valve between the scroll casing tongue part parallel to the axial direction of a rotary shaft and the outer edge of a vane wheel of the cross flow fan is variable. The scroll casing tongue part (4) is axially toothed, corrugated or skewed and twisted. Through the axial change of the volute structure and the function of the wind wheel, the cross flow fan can axially generate inconsistent (trend) pressure fluctuation to inhibit the large ultraharmonics components generated by the cross flow fan and the wind wheel in order to eliminate the harsh sound caused by the ultraharmonics contained in noise, and meanwhile, by changing the axial structure of the cross flow fan, the axial flow of a flow field in the cross flow fan can help to inhibit the generation and development of end wall corner vortexes, swirls in the clearance flow of the wind wheel, and the like, thus reducing aerodynamic noise and finally improving the sound quality of the whole machine and controlling the noise level of the whole machine.

Description

technical field [0001] The invention is a cross-flow fan, which belongs to the transformation technology of the cross-flow fan. Background technique [0002] Compared with the axial flow fan and the centrifugal fan, the cross-flow fan has a higher total pressure coefficient under a certain flow coefficient, and its requirement for the radial size of the wind wheel is very small (small volume); it can be freely used according to the requirements of the air volume The choice of impeller length, and the characteristics of uniform and concentrated air supply and low noise, although its efficiency is low compared with axial flow and centrifugal fans, it is used in low-pressure ventilation and ventilation occasions such as household appliances, laser instruments, and agriculture. Material cleaning and other aspects have been widely used. With the improvement of industrial production, science and technology, and people's requirements for the cleanliness and comfort of working and ...

Claims

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Application Information

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IPC IPC(8): F04D29/42F04D29/66
CPCF04D17/04
Inventor 周拨姜凤华张敏程竑理
Owner GUANGDONG MIDEA ELECTRIC APPLIANCES CO LTD
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