CN202216357U

CN202216357U - Roof ventilator capable of preventing air from flowing back

Info

Publication number: CN202216357U
Application number: CN2011202759704U
Authority: CN
Inventors: 梁国富
Original assignee: SHANGYU VENTILATING MACHINERY CO Ltd
Current assignee: SHANGYU VENTILATING MACHINERY CO Ltd
Priority date: 2011-08-01
Filing date: 2011-08-01
Publication date: 2012-05-09
Anticipated expiration: 2021-08-01

Abstract

The utility model discloses a roof ventilator capable of preventing air from flowing back. The roof ventilator comprises a roof ventilator shell. A stop lever is fixed at an air inlet of the roof ventilator shell. A gravity check valve consists of a frame body and a plurality of blades which are hinged with the frame body. The blade is divided into a relatively shorter blade segment and a relatively longer blade segment by taking a hinge shaft as a center. The relatively longer blade segment of the outermost blade is pressed against the frame body. The stop lever is arranged on the upper parts of the blades. A distance from the bottom of the stop lever to the hinge shaft which serves as the center is shorter than a distance from the top of the relatively longer blade segment to the hinge shaft which serves as the center. The frame body is fixed at the air inlet of the roof ventilator shell. By the roof ventilator, outdoor air can be effectively prevented from flowing back into a room through a roof ventilator channel, and indoor air is kept clean.

Description

A kind of powerroof ventilator that prevents that wind from refluxing

Technical field:

The utility model relates to the ventilation blower technical field, more specifically to a kind of windproof reflux of powerroof ventilator.

Background technology:

The prior roofs ventilation blower is placed on and is used for indoor ventilation on roof or the roof, and its weak point is: when outdoor wind was big, outdoor wind energy to indoor backflow, caused room air pollution through the powerroof ventilator passage.

The utility model content:

The purpose of the utility model is exactly the deficiency to prior art, and a kind of powerroof ventilator that prevents that wind from refluxing is provided, and it can prevent effectively that outdoor wind from passing through the powerroof ventilator passage to indoor backflow, keeps the cleaning of room air.

The technological solution of the utility model is following:

A kind of powerroof ventilator that prevents that wind from refluxing comprises the roof ventilation engine housing, is fixed with pin at the air inlet place of roof ventilation engine housing, and the gravity check-valves is made up of framework and several blades that are hinged on the framework; Blade is that the center is divided into short section blade, long section blade with the jointed shaft; The long section blade of that blade on the wherein limit is pressed against on the framework; Pin places the top of blade; The distance at pin bottom to jointed shaft center is less than the distance at long section vane tip to jointed shaft center, and framework is fixed on the air inlet place of roof ventilation engine housing.

Said lever has one, framework welding or through being bolted to the air inlet place of roof ventilation engine housing.

The beneficial effect of the utility model is:

It can prevent effectively that outdoor wind from passing through the powerroof ventilator passage to indoor backflow, keeps the cleaning of room air.

Description of drawings:

Fig. 1 is the structural representation of the utility model

The structural representation of lever when Fig. 2 is the gravity closure of check ring and gravity check-valves

The structural representation of lever and gravity check-valves when Fig. 3 opens for the gravity check-valves

Fig. 4 is lever and gravity check-valves matching relationship sketch map

Among the figure: 1, roof ventilation engine housing; 2, pin; 3, gravity check-valves; 31, framework; 32, blade; 33, jointed shaft; 321, short section blade; 322, long section blade.

The specific embodiment:

Embodiment: see shown in Fig. 1 to 4; A kind of powerroof ventilator that prevents that wind from refluxing; Comprise roof ventilation engine housing 1, be fixed with pin 2 at the air inlet place of roof ventilation engine housing 1, gravity check-valves 3 is made up of framework 31 and several blades 32 that are hinged on the framework 31; Blade 32 is that the center is divided into short section blade 321, long section blade 322 with jointed shaft 33; The long section blade 322 of that blade 32 on the wherein limit is pressed against on the framework 31; Pin 2 places the top of blade 32; The distance H at pin 2 bottoms to jointed shaft 33 centers less than long section blade 322 tops to jointed shaft 33 centers apart from S, framework 31 is fixed on the air inlet place of roof ventilation engine housing 1.

Said lever 2 has one, framework 31 welding or through being bolted to the air inlet place of roof ventilation engine housing 1.

Operation principle: see shown in Figure 3ly, when powerroof ventilator was opened, under the effect of exhausting, blade was holded up, and long section blade 322 withstands on the lever 2, and at this moment, room air is outwards extracted out.

See shown in Figure 2; When powerroof ventilator is closed; This moment, the gravity check-valves 3 cut out, and the long section blade 322 of that blade 32 on the wherein limit is pressed against on the framework 31, and outdoor wind is blocked in outdoor by gravity check-valves 3; Prevent that outdoor wind from passing through the powerroof ventilator passage to indoor backflow, keeps the cleaning of room air.

Claims

1. powerroof ventilator that can prevent that wind from refluxing; Comprise roof ventilation engine housing (1); It is characterized in that: be fixed with pin (2) at the air inlet place of roof ventilation engine housing (1), gravity check-valves (3) is made up of framework (31) and several blades (32) of being hinged on the framework (31); Blade (32) is that the center is divided into short section blade (321), long section blade (322) with jointed shaft (33); The long section blade (322) of that blade (32) on the wherein limit is pressed against on the framework (31); Pin (2) places the top of blade (32); The distance (H) at pin (2) bottom to jointed shaft (33) center is less than the distance (S) at long section blade (322) top to jointed shaft (33) center, and framework (31) is fixed on the air inlet place of roof ventilation engine housing (1).

2. a kind of powerroof ventilator that prevents that wind from refluxing according to claim 1, it is characterized in that: lever (2) has one, framework (31) welding or through being bolted to the air inlet place of roof ventilation engine housing (1).