Bell mouth

About: Bell mouth is a research topic. Over the lifetime, 603 publications have been published within this topic receiving 1624 citations.

An outdoor unit of an air-conditioning system

Abstract: To provide an outdoor unit of an air-conditioning system characterized in that the outdoor unit has a reduced bodily size. The outdoor unit is characterized in that said bell mouth 13 is provided with a damping portion 14 which extends in an upstream direction from part of the circumference of said bell mouth 13 , said part 4 of the circumference located on a side opposite to said heat exchanger 7 where said propeller fan 12 and a side panel 4 are positioned close to each other.

Axial blower, air conditioner, and ventilation fan

Abstract: PROBLEM TO BE SOLVED: To provide an axial blower of noise performance and efficiency improved by reducing jet stream generated at a gap between an outer circumference end edge of blades and a bell mouth, and an air conditioner and a ventilation fan using the axial blower. SOLUTION: In this axial blower, the bell mouth 5 is disposed at an outer circumference of an impeller 4 comprising a plurality of forward swept wing type blades 13. The bell mouth 5 includes a throttling part 52 formed oppositely to the outer circumference of the impeller 4 so as to partition a blow out zone and a suction zone of the blower, a suction side opening part 51 expanding a suction side of the throttling part 52, and a blow out side opening part 53 expanding a blow out side. The throttling part 52 comprises a first throttling part 52a forming a gap g of necessary minimum dimension n with the outer circumference end edge R of the blades 13 and a second throttling part 52b forming a gap of dimension greater than the necessary minimum dimension n with the outer circumference end edge R of the blades 13. The second throttling part 52b is formed at a blow out side of the first throttling part 52a. COPYRIGHT: (C)2011,JPO&INPIT

Interface structure for pipelines

Abstract: The utility model relates to an interface structure for pipelines, which is particularly suitable for connection of cast pipelines. A socket is inserted into a bell mouth, a press flange is compressed on the left end surface of a rubber ring placed between the socket and the bell mouth through a bolt and a nut, a support ring is arranged between the right end surface of the rubber ring and both the socket and the bell mouth, and the size H of the support ring is larger than 2h and smaller than H1. The interface structure for the pipelines has a simple structure, is secure in connection and is suitable for the pipeline with various calibers.

Axial-flow blower

Abstract: PURPOSE:To realize the reduction of noise by arranging vanes of 2(n+1) pieces (n is a positive integral number) alternatively in the direction of the air flow. CONSTITUTION:In this axial-flow blower, a bell mouth 2 with a circular arc- form section is furnished at the air intake side of a cylindrical wind tunnel 1, and an impeller rotated by an electric motor 3 is furnished inside the wind tunnel 1. In this case, the impeller is composed by furnishing vanes 7 and 8 around a vane boss 6 which is installed to the output shaft 5 of the motor 3, arranging alternatively in the direction of the air flow. And the total numbers of the vanes 7 and 8 are made 2(n+1) (n is a positive integral number), and it is made 6 vanes in the figure. Consequently, the peak noise which is determined by the product of the number of vanes and the rotation frequency can be divided into two, and the noise can be reduced.

Circular hot air welding tip

Abstract: The utility model relates to a ring welding tip with hot gas, which is provided with a wind gun joint The clamp nut is arranged on top of and outside the wind gun joint, and the bottom of the wind gun joint is connected with the upside of the bell mouth for dispelling wind In addition, a sealing board is arranged at the bottom of the bell mouth for dispelling wind The technical proposal: four square outlet air holes are arranged on the sealing board of the bell mouth, a ring outer circumferential boarding is arranged at the bottom of the sealing board, and the ring inner circumferential boarding is arranged on the inside of the outer circumferential boarding In addition, a ring passage is connected with the outlet air hole The utility model overcomes the shortcomings in prior art such as difficulties in welding, high cost and low welding quality, and provides the ring welding tip of hot gas with the simple structure, low cost, homogeneous blowing, and perfect welding effect