CN202326291U

CN202326291U - Hand blower

Info

Publication number: CN202326291U
Application number: CN2011204918936U
Authority: CN
Inventors: 孙江龙; 吕续舰; 杨侠; 万文涛; 黄忠文; 陈显文
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2011-12-01
Filing date: 2011-12-01
Publication date: 2012-07-11
Anticipated expiration: 2021-12-01

Abstract

The utility model provides a detachable hand blower. The detachable hand blower comprises a chassis with an air inlet and an air outlet, a speed increaser, a cranking handle and a centrifugal impeller, wherein the centrifugal impeller is arranged inside the chassis, the exterior of the chassis is in bolt connection with the speed increaser, and the input end and output end of the speed increaser are respectively in key connection with the cranking handle and the impeller. Under the driving of the cranking handle, the impeller is driven to rotate at a high speed by an output shaft of the speed increaser, so that air in the chassis is thrown out of the impeller and blown out through the air outlet due to the generation of a centrifugal force, and new air is replenished from the air inlet due to a negative pressure generated because air around the impeller is thrown out. The hand blower provided by the utility model has the advantages of low noise, high efficiency, large air quantity, high total pressure, low cost, convenience in detaching and repairing and applicability to mass production.

Description

A kind of hand blower

Technical field

The utility model relates to the ventilation equipment field, and being specifically related to a kind of can be the ventilation equipment that under the non-electricity condition, use from dismounting high speed hand blower.

Background technique

Rural area certain customers cook to burn coal, Chai Weizhu; Its blast apparatus that adopts is generally wooden bellows, and this device structure is simple, cost is low, but volume is big, inefficiency, effort; Can not satisfy specific demand; For example, the cooking requirement during field exercise, especially can not satisfy small-size coal mine has a power failure or one is airtight environment needs the specific demand when extraneous air inducing is come in.

The model utility content

The purpose of the utility model is to provide that a kind of volume is little, air quantity is big, total head is high, carry the small-sized hand blower with easy accessibility.

A kind of hand blower comprises casing, speed increaser, rocking handle and centrifugal impeller with intake grill and exhaust outlet, is provided with centrifugal impeller in the housing, and the outside bolt connects speed increaser, and the input end of speed increaser is connected rocking handle and impeller with output terminal difference key.

Further, said intake grill comprises the induced air pipe that is communicated with casing, induced air pipe through cover cover plate and casing above that stubborn connect fixing.

Further, said bottom of shell has the discharge orifice.

Further, said intake grill and exhaust outlet place are provided with copper mesh.

The technique effect of the utility model is embodied in: the utility model adopts the centrifugal fan design principle; Noise is little; Volume is little, and the impeller rotational speed is big, and general hand blower of air quantity and full pressure ratio and foot-operated blower fan are much bigger; Can carry out impeller design as the case may be, to reach different air quantity (0-1000m ³/ h) and total head (0-2.0kPa), can also connect induced air pipe at the intake grill place, to satisfy the ventilation requirement in different engineerings field.Twist through bolt or key or cover plate between the utility model all component and connect mode and assemble, for convenience detach, be easy to carry, satisfy open-air cooking, small-size coal mine has a power failure or closed environment needs the specific demand when extraneous air inducing is come in.

Description of drawings

Fig. 1 is the general shape figure (seeing from the speed increaser end) of the utility model;

Fig. 2 is the general shape figure (seeing from the intake grill end) of the utility model;

Fig. 3 is the circular cover structural drawing of the utility model, the circular cover structural drawing of Fig. 3 a for seeing from the intake grill end, and Fig. 3 b is the A-A sectional view of Fig. 3 a;

Fig. 4 is the centrifugal impeller structural drawing of the utility model, and Fig. 4 a is a front view, and Fig. 4 b is the A-A sectional view of Fig. 4 a.

Embodiment

Describe the utility model in detail below in conjunction with accompanying drawing and preferred embodiment.

Like Fig. 1, shown in 2 and 3, embodiment comprises casing 1, speed increaser 2, rocking handle 3 and impeller.

Casing 1 adopts the thick corrosion resistant plate welding fabrication of 3mm, and the back plating that polishes flat is ironed.In the base 4 of the casing lower end discharge orifice that to offer a diameter be 6mm, in case can't run well after the blower fan water inlet.Intake grill is located on the side plate of casing 1, and intake grill comprises ventilation duct 6 and circular cover 5 (diameter is than the big 10mm of impeller disk diameter), on cover plate 5 and casing after the tapping, can directly and housing is stubborn connects easy accessibility.Exhaust outlet 7 is opened on casing 1.Intake grill and exhaust outlet all are provided with copper mesh, in case big foreign matter gets into blower fan damage impeller.

As shown in Figure 4, impeller adopts duralumin to make, and 12 blade two ends are curled into column and the riveted joint of impeller substrate, and the back metallisation polishes flat.

Speed increaser 2 adopts third-level planetary gear (velocity ratio is selected according to design air flow and total head); Transmission is stable, and stressed even, input and output gear are on same axis; It turns to identical; Utilize screw nut that speed increaser is fixed on the casing, in order to reinforce and to stablize, this face adopts the thick corrosion resistant plate of 5mm.The speed increaser input shaft links to each other with rocking handle 3 (adopting key and keyway), output axle head mounted impeller (adopting key and keyway equally), and it is fastening to utilize fair water cone to add rubber sheet gasket, easy accessibility.

During use; Holding the crank clockwise direction rotates; Output shaft of the speed increaser impeller high speed rotating makes air in the casing produce centrifugal force and is thrown off impeller and blows out through exhaust outlet, and the impeller ambient air is thrown out of and produces negative pressure and make new air replenish into from intake grill.

Claims

1. a hand blower comprises casing, speed increaser, rocking handle and centrifugal impeller with intake grill and exhaust outlet, is provided with centrifugal impeller in the housing, and the outside bolt connects speed increaser, and the input end of speed increaser is connected rocking handle and impeller with output terminal difference key.

2. hand blower according to claim 1 is characterized in that said intake grill comprises the induced air pipe that is communicated with casing, induced air pipe through cover cover plate and casing above that stubborn connect fixing.

3. dismantled and assembled hand blower according to claim 1 is characterized in that said bottom of shell has the discharge orifice.

4. according to claim 1 or 2 or 3 described hand blowers, it is characterized in that said intake grill and exhaust outlet place are provided with copper mesh.