CN2765100Y

CN2765100Y - Wind-return preventing type air draft device

Info

Publication number: CN2765100Y
Application number: CN 200420113605
Authority: CN
Inventors: 崔民秀; 王言
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-22
Filing date: 2004-11-22
Publication date: 2006-03-15
Anticipated expiration: 2014-11-22

Abstract

The utility model relates to a wind-return preventing type wind draft device which is the improvement of a pipeline structure with a non-return valve in an exhaust air duct. The utility model provides the wind-return preventing type wind draft device which can prevent the returning wind and the back flow without cleaning. The utility model comprises an exhaust duct, and has the essential structure that the wall of the upper duct of the exhaust duct is provided with an upper opening and a lower opening which are separately connected with an upper wind-return channel and a lower wind-return channel which are upward opened and are in parallel with the duct wall, and an opening between the upper wind-return channel and the lower wind-return channel is a venting channel. The outside of the duct is provided with an outer diversion pipe, wherein the upper part and the lower part of which are opened.

Description

The anti-air exhausting device of formula against the wind

Technical field:

The utility model is the improvement that has the non-return valve pipeline configuration in the exhaust duct.

Background technology:

At present, the external a plurality of air drafts of the shared exhaust duct source of building for stoping in the contrary wind cigarette inlet chamber, is provided with non-return valve usually between pipeline and air draft source; Owing to use for a long time, will speckle with greasy dirt on the valve, cause that valve closing is tight, valve event is dumb; Not even action does not just have anti-effect against the wind.

The utility model content:

The utility model is exactly at the problems referred to above, and a kind of air exhausting device with anti-contrary wind formula that prevents to flow backwards against the wind and need not clean is provided.

The utility model adopts following technical scheme: the utility model comprises exhaust duct, its structural feature is that the wall of the top conduit of exhaust duct is provided with upper shed, under shed, upper shed, under shed make progress with opening respectively and superinverse air channel, the subinverse air channel parallel with catheter wall links to each other, and the opening between superinverse air channel, the subinverse air channel is an airway; The arranged outside of conduit has the outer mozzle of last lower open mouth.

The beneficial effects of the utility model:

1, can prevent in the contrary wind inlet chamber:

During air draft normally, the wind of indoor air draft source fair speed enters in the public exhaust duct through the passage of exhaust duct, conduit; And make the both sides of discharging wind produce low-pressure area, created condition for circulating against the wind; When contrary wind, then discharge outside the conduit by the contrary wind road respectively against the wind, discharge again with public exhaust duct;

2, can not clean, can not keep in repair:

Because the low-pressure area that the utility model utilizes the air draft high-speed motion to produce allows and discharges at low-pressure area against the wind, does not normally discharge and do not influence air draft; Therefore, only utilize the setting of pipeline against the wind to achieve the goal, and need not any movable part, for example, non-return valve; Therefore, this utility unit can often clean, need not keep in repair, for the user provides convenience;

3, air draft is effective:

Because the outer mozzle of lower open mouth is low-pressure area between outer mozzle and the conduit on the arranged outside of conduit has, can more help just more helping the high efficiency raising of air draft of the present utility model with by the contrary wind discharge of pipeline against the wind;

4, simple in structure:

Assembly of the present utility model is few, and body is simple, and stable performance is easy to make, and is easy to popularize.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that the A of Fig. 1 is to view;

Fig. 3 is the vertical view of Fig. 1.

The specific embodiment:

The utility model comprises exhaust duct 1, the wall 2 of the top conduit 10 of exhaust duct 1 is provided with upper shed 9, under shed 3, upper shed 9, under shed 3 make progress with opening respectively and superinverse air channel 8, the subinverse air channel 5 parallel with conduit 10 walls 2 links to each other, and the opening between superinverse air channel 8, the subinverse air channel 5 is an airway 6; The arranged outside of conduit 10 has and goes up uncovered 11, lower open mouth 14 outer mozzles 15.

Upper shed 9, under shed 3 can be oval 16; The same upper shed 9 in superinverse air channel 8, subinverse air channel 5, under shed 3 junctions are arc 7, arc 4, are convenient to air draft.

Can be fire trapping ring 12 outside the exhaust duct 1, fire trapping ring 12 can be purchased from market.

Also can be provided with spilled water hole 13, so that the ponding in the exhaust duct 1 is discharged in the bottom of exhaust duct 1.

Claims

1, the anti-air exhausting device of formula against the wind, comprise exhaust duct (1), the wall (2) that it is characterized in that the top conduit (10) of exhaust duct (1) is provided with upper shed (9), under shed (3), upper shed (9), under shed (3) make progress with opening respectively and superinverse air channel (8), subinverse air channel (5) parallel with conduit (10) wall (2) link to each other, and the opening between superinverse air channel (8), subinverse air channel (5) is airway (6); The arranged outside of conduit (10) has uncovered (11), the outer mozzle of lower open mouth (14) (15) of going up.

2, the air exhausting device of anti-contrary wind formula according to claim 1 is characterized in that upper shed (9), under shed (3) are oval (16).

3, the air exhausting device of anti-contrary wind formula according to claim 1 is characterized in that same upper shed (9), under shed (3) junction of superinverse air channel (8), subinverse air channel (5) is arc (7), arc (4).

4, the air exhausting device of anti-contrary wind formula according to claim 1 is characterized in that being outside the exhaust duct (1) fire trapping ring (12).

5, the air exhausting device of anti-contrary wind formula according to claim 1 is characterized in that being provided with spilled water hole (13) in the bottom of exhaust duct (1).