CN2648119Y

CN2648119Y - Exhaust fan

Info

Publication number: CN2648119Y
Application number: CN 03208744
Authority: CN
Inventors: 洪淑惠
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-29
Filing date: 2003-08-29
Publication date: 2004-10-13
Anticipated expiration: 2013-08-29

Abstract

The utility model discloses an exhaust fan which includes a shell presenting cylindrical shape with scheduled depth and with a frame in the interior having a proper distance away from the front end, a vane group, a belt wheel which is pivotally connected to the frame, a plurality of vanes fixed on the belt wheel and made of aluminum alloy material in integration forming type; the vanes along the long shaft direction present arc shape; the utility model also includes a drive device, a motor which is fixed on the frame and a drive belt which is connected between the motor and the belt wheel. By the coordination of all components, the exhaust fan has the advantages of cheap manufacturing cost, light weight and energy saving.

Description

Ventilating fan

Technical field

The utility model relates to a kind of air exhausting device, is meant the herding ventilating fan that a kind of flabellum is in light weight, yielding and not cheap for manufacturing cost especially.

Background technique

By the large-scale ventilating fan of existing herding, include a housing on its structure substantially, a motor is fixed in this housing central authorities, and a flabellum group is fixed in the end of exerting oneself of this motor; Can make this ventilating fan be fixed on suitable place by this housing, then can drive this flabellum group by this motor and form one air-flow, and reach the effect that makes farm house heat radiation or peace and quiet air.The flabellum group of existing ventilating fan includes again substantially in order to a pedestal that is connected with motor, and is fixed on several flabellums on this pedestal.

And in order to strengthen effective exhaust air rate, wind direction and the wind speed that the flabellum rotation can form the time, so flabellum mostly is made as and has suitable radian.The flabellum of traditional type mainly contains two kinds of methods on making, one is impact briquetting, and another is a casting.

With impact style moulding person, all be to carry out the punching press first time earlier with the iron and steel thin slice, make to form suitable shape, and then carry out the punching press second time, make along its long axis direction and slightly reverse, the wind-exposuring area when being subjected to motor driven to increase it.The flabellum of this kind pattern, its advantage are that manufacture cost is lower, and after shortcoming then was to use a period of time, this iron and steel sector-meeting reverted to planar gradually, and makes it can't produce enough air quantity and wind speed.

With forging type moulding person, its advantage then is that the flabellum shape changes never, and, can also pedestal and flabellum is simultaneously one-body molded; Its shortcoming then is that manufacture process is comparatively complicated, and makes its cost higher, is exactly with forging type moulding person in addition, its flabellum must have sizable thickness, cause its overall weight excessive, and must use the higher motor of price, its bearing and support also are easier to damage simultaneously.

Aforementioned two kinds of flabellum manufacture methodes also have a common shortcoming, and the difference that must look the housing size dimension is exactly prepared the mould of multiple size in advance, thereby causes the sizable cost burden of its manufacturer.

Summary of the invention

The purpose of this utility model provides a kind of ventilating fan, and it has distortion never, and the quite light two-fold advantage of weight.

For achieving the above object, ventilating fan described in the utility model includes: a housing, be tubular with predetermined depth, and inside is provided with the support apart from the suitable distance of its front end; One flabellum group has a belt pulley that is hubbed on this support, and is fixed in several flabellums on this belt pulley, and each flabellum made in one-body molded mode by aluminum alloy material, is curved along the transverse shape of its long axis direction; One drive unit has a motor that is fixed on this support, and is connected in the respectively drive belt between this motor and this belt pulley.

This enclosure interior is provided with a dividing plate of tool proper area, is formed with a pressure accumulating chamber between this dividing plate and this housing front end; Other has a venetian blind to be fixed on this housing front end, and it has a framework, and is hubbed on several blades on this framework.

Described this belt pulley is provided with the floor that its number equates with this flabellum respectively, and each floor has and each identical surface of flabellum outer rim shape, and should the surface and the axis of rotation of this belt pulley press from both sides a predetermined angle.

The transverse shape of this flabellum is to be the thickness of the thickness of central position greater than its side, perhaps is that to be the thickness of central position identical with the thickness of its side edge.

The utility model has the advantages that: by the cooperation of each assembly, it is cheap for manufacturing cost that this ventilating fan is had, and in light weight and advantage that can save the energy.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the utility model one preferred embodiment.

Fig. 2 is the sectional view of the utility model one preferred embodiment.

Fig. 3 is the three-dimensional exploded view of flabellum group in the utility model one preferred embodiment.

Fig. 4 is along the sectional view of 4-4 direction among Fig. 3.

Fig. 5 is the sectional view of another preferred embodiment of flabellum in the utility model.

Embodiment

See also each figure, ventilating fan of the present utility model (20) includes a housing (30), and is located at an inner flabellum group (40) of housing (30) and a drive unit (50).

This housing (30) is the rectangle tubular with appropriate depth, and a dividing plate (32) is located at its inside, and at a distance of the suitable distance of this housing (30) front end one, and therebetween forming a pressure accumulating chamber (34), its central authorities also are provided with a circular hole; One support (36) is fixed on the inside of this housing (30); One venetian blind (38) is fixed in this housing (30) front end, and it has a framework (380) and is hubbed at most the blades (382) that this framework (380) upward can be swung.

This flabellum group (40) includes a belt pulley (42) and is fixed on four flabellums (44) on this belt pulley (42).This belt pulley (42) is hubbed on this support (36) with one of its center portion bearing support (420), and be positioned at the circular hole central authorities of this dividing plate (32), four floors (424) are connected between this belt pulley (42) inner edge and the bearing support (420) with being radiation-like, its surperficial slightly inclined and press from both sides an angle, and the camber that slightly caves in the axle center of this bearing support (420).Each flabellum (44) is to make in one-body molded mode with aluminum alloy material, and its transverse shape is curved, and the outer rim of its protrusion can be posted by floor (424) surface, is locked with screw again.

This drive unit (50) includes a motor (52) that is fixed in this housing (30) internal corners place, and be connected in this motor (52) exert oneself the end and this belt pulley (42) between a drive belt (54).

After this motor (52) is activated, can drives belt pulley (42) via drive belt (54) and rotate, and form one towards this housing (30) rear airflow flowing by this flabellum (44) respectively.And because this air-flow is mobile backwards, therefore, be positioned at the pressure accumulating chamber (34) of this housing (30) front end, its internal pressure will reduce and form a suction, and then force each blade (382) on this venetian blind (38) to be swung up, can enter its inside by this housing (30) front end swimmingly for air, discharge by its rear end again.

And after this drive unit (26) shuts down,, and form the state that closes ventilating fan (20) front end because no longer at the inner suction that forms of this pressure accumulating chamber (34), therefore respectively this blade (382) can be sagging naturally because of gravitational relation.

Utilize the technology of aluminium alloy extruded moulding in the utility model, can also have three advantages:

One, the manufacturer can prepare the quite long material of most branches in advance, according to circumstances its stamp is broken into required length then, in the housing (30) that is assemblied in different sizes, and needn't must prepare most group moulds as the design of traditional type.

Two, because its quality of aluminum alloy material is quite light, its rotation can be driven easily, therefore the manufacture cost of ventilating fan (20) can be effectively reduced with miniature motor.

Three, because the aluminium extruding material can the required shape of each flabellum of straight forming (44), and need not again, so its shape can permanent fixation with the stamping technology moulding, and the phenomenon that can not deform.

Shape as for its transverse section of each flabellum (44), shown in Figure 4 except that being made as preceding taking off, central authorities with the side position have same thickness person outside, see also Fig. 5, its thickness that also can be set as central position is constant, and makes the shape of dual-side thickness attenuation, the material consumption when making the flabellum (44) with this shape not only can slightly save its manufacturing, and can reduce the resistance of air that is met with again in the running, and more save electric power.

Claims

1. a ventilating fan is characterized in that, includes:

One housing is the tubular with predetermined depth, and inside is provided with the support apart from the suitable distance of its front end;

One flabellum group has a belt pulley that is hubbed on this support, and is fixed on several flabellums on this belt pulley, and each flabellum made in one-body molded mode by aluminum alloy material, is curved along the transverse shape of its long axis direction;

One drive unit has a motor that is fixed on this support, and is connected the drive belt between each motor and this belt pulley.

2. ventilating fan according to claim 1 is characterized in that: described this enclosure interior is provided with a dividing plate of tool proper area, is formed with a pressure accumulating chamber between this dividing plate and this housing front end; Other has a venetian blind to be fixed on this housing front end, and it has a framework, and is hubbed on several blades on this framework.

3. ventilating fan according to claim 1, it is characterized in that: described this belt pulley is provided with the floor that its number equates with this flabellum respectively, each floor has and each identical surface of flabellum outer rim shape, and should the surface and the axis of rotation of this belt pulley press from both sides a predetermined angle.

4. ventilating fan according to claim 1 is characterized in that: the transverse shape of described this flabellum is to be the thickness of the thickness of central position greater than its side.

5. ventilating fan according to claim 1 is characterized in that: the transverse shape of described this flabellum is that to be the thickness of central position identical with the thickness of its side edge.