Noise reduction flow collector for centrifugal fan, centrifugal fan and air conditioning system

Abstract

The invention provides a noise reduction flow collector for a centrifugal fan, the centrifugal fan and an air conditioning system. The noise reduction flow collector comprises an assembly section (1),a flow guide section (2) and groove structures (3), wherein the assembly section (1) is matched with a volute structure of the centrifugal fan and is used for fixing a flow collector body, the flow guide section (2) is connected to the assembly section, the airflow is guided along the flow guide section from the outside of the flow collector body, the flow guide section (2) comprises a windward surface and a leeward surface, and the groove structures (3) are formed in the leeward surface of the flow guide section (2) and are blind grooves. According to the noise reduction flow collector, thecentrifugal fan and the air conditioning system, after the swirling airflow flows through the grooves, the flowing direction is changed, the swirling airflow deviates from the original trajectory, andtherefore a large vortex can be avoided, and the strength of the vortex can be dispersed; and meanwhile, impact and friction are generated between the airflow and the inner walls of the grooves so that the vortex speed can be decreased, the energy can be consumed, and therefore the vortex noise of the space area of the top of a centrifugal fan blade and the flow collector body can be effectivelyreduced, the noise reduction effect can be effectively improved, in addition, the structure is simple, and the processing cost is low.

Description

technical field [0001] The invention belongs to the technical field of fans, and in particular relates to a noise reduction collector for a centrifugal fan, a centrifugal fan and an air conditioning system. Background technique [0002] In the air duct structure of the conventional centrifugal cabinet machine air conditioner, in order to ensure the good flow collection effect of the collector and prevent the collision between the centrifugal fan blade and the collector during operation, there is often a gap between the top of the centrifugal fan blade and the collector. Large space gap. When the air conditioner is running, the multi-blade centrifugal blades often entrain air at the top of the blades, forming a vortex and generating large eddy current noise. [0003] In order to reduce the eddy current noise, the patent CN105570201 uses the cavity structure to absorb and reduce noise according to the principle of Helmholtz resonance. The cavity structure is complicated, the ...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the current collector structure applied to the centrifugal fan in the prior art has a bad noise reduction effect, thereby providing a noise reduction collector for the centrifugal fan, Centrifugal fans and air conditioning systems

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