Showing papers on "Bell mouth published in 2000"
Patent•
15 Sep 2000
TL;DR: In this article, a ceiling type air conditioner is provided to reduce noise and improve efficiency of the air conditioning system by reducing the generation of vertex flow between a bell mouse and a shroud by folding the end part of the bell mouth.
Abstract: PURPOSE: A ceiling type air conditioner is provided to reduce noise and improve efficiency of the air conditioner by reducing generation of vertex flow between a bell mouse and a shroud by folding the end part of the bell mouth to form the bell mouth in the shape of sine function. CONSTITUTION: A ceiling type air conditioner includes a bell mouse(58) for guiding air flow for reducing generation of vortex flow at a suction hole between the bell mouse and a shroud(57), so that the air flow amount is increased and the whole efficiency of the air conditioner is improved while reducing the noise due to the vortex flow, wherein the end part of the bell mouth is folded in the shape of sine function curve facing an air flow direction of the suction hole.
5 citations
Patent•
15 Apr 2000
TL;DR: In this article, a sirocco fan having low noise and high performance is composed of a bell mouth, which is projected into the upper area and has different sectional faces according to the azimuth on the basis of the rotary direction of an impeller.
Abstract: PURPOSE: A sirocco fan having low noise and high performance is provided to reduce the noise generated from an inlet and to increase the performance thereof by realizing the equal suction flow field. CONSTITUTION: A sirocco fan having low noise and high performance is composed of a bell mouth(50). The bell mouth is projected into the upper area and has different sectional faces according to the azimuth on the basis of the rotary direction of an impeller. The flow passing through the bell mouth is changed by each part to be fitted into the three-dimensional flow if the bell mouth is formed to be partially different according to the azimuth of the rotation direction of the impeller. Therefore, the sirocco fan improves the flow and reduces the noise by decreasing the resistance of the flow.
4 citations
Patent•
[...]
25 Oct 2000
TL;DR: In this paper, the authors proposed the utility model, which has the advantages of simple structure, convenient construction and installation, good sealing performance and effective prevention of mutual tainting by odour in downdraught.
Abstract: The utility model discloses a socket type flue, which is composed of a tube wall, an upper clamping plate and a lower clamping plate. The upper part of the tube wall is provided with a step-shaped socket, and a bell mouth of the lower part is a flat mouth. The utility model has the advantages of simple structure, convenient construction and installation, good sealing performance and effective prevention of mutual tainting by odour between floors and downdraught.
1 citations