CN2331898Y

CN2331898Y - So undproofing ventilation machine installed on roof

Info

Publication number: CN2331898Y
Application number: CN 98230713
Authority: CN
Inventors: 许林; 吴景章; 刘小燕
Original assignee: 许林
Priority date: 1998-05-14
Filing date: 1998-05-14
Publication date: 1999-08-04
Anticipated expiration: 2008-05-14

Abstract

The utility model relates to a silencing ventilator on a roof, which belongs to the technical field of the ventilator. The silencing ventilator on a roof comprises a machine base, an air inlet, an impeller, a motor, an air inlet pipeline, and an air cap. The motor and the impeller are arranged in the air inlet pipeline; a pipe wall of the air inlet pipeline is composed of a housing and sound-absorbing materials which are lined on the housing; a curved surface of the air cap corresponding to a pipe opening of the air inlet pipeline is a perforating curved surface of a convex arc, and the internal part of the curved surface is clamped and lined with the sound-absorbing materials. The utility model has advantages of simple structure, good silencing effect, and reduced noise pollution to environment. The silencing ventilator on a roof is suitable for a ventilating device of an industrial factory building.

Description

Roof noise elimination ventilation blower

The utility model belongs to the ventilation blower technical field, relates to a kind of roof noise elimination ventilation blower.

Powerroof ventilator with its simple installation, attractive in appearance, do not influence characteristics such as architectural appearance, ventilation effect be good, be widely used on the building of industries such as electric power, chemical industry, metallurgy, traffic, weaving.But existing ventilator structure is that motor is installed in out the blast cap place is serious to room external environment noise pollution, when common roof ventilator runs well, its noise figure is generally at 70-88dB (A), because building density is big in the city, and industrial premises and the civil buildings situation about being located in that crosses one another is more, therefore noise pollution causes dried scratching to city dweller's life, work, study, and influences people's physical and mental health.

The purpose of this utility model be to provide a kind of simple in structure, noise is low, apply to the roof noise elimination ventilation blower of industrial premises air-conditioning requirement.

The purpose of this utility model realizes with the following methods.This roof noise elimination ventilation blower comprises support, air inlet, impeller, motor, intake stack, blast cap, motor and impeller are installed in the intake stack, the tube wall of intake stack is made up of shell, the sound-absorbing material of lining on shell, the curved surface of the relative intake stack mouth of pipe of blast cap is the convex arc perforated curved-surface, folder lining sound-absorbing material in the curved surface.Below in conjunction with the embodiment accompanying drawing, the utility model will be further described.

Fig. 1 is the utility model structural representation;

Fig. 2 is an A partial enlarged drawing among Fig. 1.

Among the figure:

1-support 2-air intake 3-impeller 4-motor

5-shell 6-wind goes out 7-support fixation bar 8-blast cap

9-sound-absorbing material 10-expanded metal lath 11-convex arc perforated curved-surface 12-sound-absorbing material

Also be lined with expanded metal lath (10) on the sound-absorbing material on the tube wall of intake stack (5), it is better fixing that sound-absorbing material (9) is obtained, and help manufacturing.

Main feature of the present utility model is by the resistance noise reduction principle, rationally adjusts the blower fan internal placement, thereby reaches the purpose that reduces the blower fan running noise.In the present embodiment, motor (4) and impeller (3) are installed in the intake stack (5), noise is suppressed, being installed in the volume that directly noise is reached outside the room in the blast cap than motor reduces greatly, intake stack (5) is lined with sound-absorbing material and expanded metal lath (10) forms the noise elimination cylindrical shell, because motor and impeller are installed in the noise elimination cylindrical shell, the noise elimination cylindrical shell has extended, can prolong the time that air communication is crossed the noise elimination cylindrical shell, favourable increase noise elimination effect.And the convex arc perforated curved-surface (11) on the blast cap (8) forms the diffusing fluid of partial noise elimination.Therefore in use enter the pneumatic noise and the noise of motor sound wave bump noise elimination cylinder inner surface sound absorption wall of noise elimination cylindrical shell from air inlet (2), sound-absorbing material absorbs the acoustic energy of incident, and change it into heat energy, the diffusing fluid of noise elimination under the blast cap is further made noise reduction process to silencing pot body exit flow, thereby reach the effect of whole noise reduction, the noise of the wind of discharge can be reduced to below the 60dB (A).

The utility model is simple in structure, and it is effective to eliminate the noise, suitable ventilation equipment as industrial premises.

Claims

1, a kind of roof noise elimination ventilation blower, comprise support (1), air inlet (2), impeller (3), motor (4), intake stack (5), blast cap (8), it is characterized in that motor (4) and impeller (3) are installed in the intake stack (5), the tube wall of intake stack (5) is made up of shell (13), the sound-absorbing material (9) of lining on shell (13), blast cap (8) curved surface of the intake stack mouth of pipe relatively is convex arc perforated curved-surface (11), folder lining sound-absorbing material (12) in the curved surface.

2, noise elimination ventilation blower in roof according to claim 1 is characterized in that also being lined with expanded metal lath (10) on the sound-absorbing material (9) on the tube wall of intake stack (5).