CN2138271Y

CN2138271Y - Indoor noiseless ventilator

Info

Publication number: CN2138271Y
Application number: CN 92228081
Authority: CN
Inventors: 李海黎
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-22
Filing date: 1992-07-22
Publication date: 1993-07-14
Anticipated expiration: 2002-07-22

Abstract

The utility model discloses an indoor noiseless ventilator. A cap-shaped throat part with concave check valve and a bent air pipe designed with a streamline shape are adopted. Thus the utility model can obviously improve the 'aeolian' noise produced by an original ventilating device.

Description

Indoor noiseless ventilator

The utility model relates to a kind of indoor exchange device, and this device can obviously improve " wind ring " noise that ventilation unit produced in the past.

At present, be used for the ventilation unit of indoor air-changing,, " wind ring " noise often occur, very disturb the people because designs such as air conduit and non-return valve are improper.

The purpose of this utility model provides a kind of ventilation unit, and it can not only reach the purpose of indoor air-changing, and can obviously reduce the noise that ventilation unit brought in the past.

The purpose of this utility model is achieved in that at the indoor exhaust wind machine for example the air outlet of smoke exhaust ventilator, use in toilet ventilating fan is provided with a hat throat, the crown portion of hat throat has Yi Fangdong, studs with a circle rubber strip along four limits in square hole, upper end in square hole, lift a non-return valve by pin, non-return valve of the present utility model, different with non-return valve in the past, it is the design of spill cambered surface, concave surface is inside, and is recessed in indoor exhaust wind machine direction, to evagination in crooked airduct direction.Air-flow has the expansion of outflow effect behind this outlet throat and non-return valve.Non-return valve is at ordinary times by deadweight sealing hole, and is indoor to prevent that outside air from blowing back into.The planar section of hat throat is fixed on the exhaust blower air outlet slit by screw, and the other end of hat throat and a crooked airduct join.The shape system of crooked airduct is by the inwardly expansion gradually of air intake end, and behind bend, by being tapered to air outlet slit end shape, air outlet slit end and indoor public ventilation shaft join, and reach the purpose of indoor air-changing with this.This crooked airduct meets airflow design, and making air-flow discharge is a linear flow, and therefore, it is minimum that air drag becomes in this shape ventilation unit, can obviously improve because the noise that air vibration produced.

Owing to adopt such scheme, only need that original ventilation equipment are carried out part and change, both can reach the purpose that reduces noise, simple in structure.

The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is the structural map of the utility model embodiment.

Fig. 2 is the combination schematic diagram of the utility model and exhaust blower.

Hole, 1. hat throats, 2. hat throat side 3. hold-down screws 4. non-return valves 5. non-return valve pins 6. crooked airduct air intake end 7. airduct bends 8. crooked airduct air outlet slit ends among the figure.

In Fig. 1, non-return valve (4) links to each other with hat throat (1) by non-return valve pin (5), one end of hat throat joins by hold-down screw (3) and exhaust blower air outlet, the other end and crooked airduct air intake end (6) join, and the air outlet slit end of crooked airduct communicates with indoor public ventilation shaft.

9 is exhaust blowers in combination schematic diagram shown in Figure 2, the 10th, and the utility model after the combination.

Claims

1, a kind of indoor ventilator unit that prevents noise is characterized in that: at indoor exhaust wind machine air outlet place, be provided with a hat throat, the crooked airduct that is provided with a non-return valve in the throat and is undertaken in this outlet throat.

2, the indoor ventilator unit that prevents noise according to claim 1 is characterized in that: a non-return valve is equipped with by pin corresponding to offering a skewed hole on the exhaust blower air outlet slit position in hat outlet throat on hole.

3, the indoor ventilator unit that prevents noise according to claim 1 is characterized in that: non-return valve system is the design of spill cambered surface, form to concave in indoor exhaust wind machine direction, to evagination in crooked airduct direction.

4, the indoor ventilator unit that prevents noise according to claim 1 is characterized in that: crooked airduct system is pursued behind bend again and is tapered to air outlet slit end shape by the expansion that extends internally of air intake end.