CN2104964U

CN2104964U - Ventilation fan with rotary vanes

Info

Publication number: CN2104964U
Application number: CN 91228416
Authority: CN
Inventors: 罗国明
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-11-16
Filing date: 1991-11-16
Publication date: 1992-05-20

Abstract

The utility model relates to a ventilation fan with rotary blades. When the ventilation fan doesn't work, all the blades are almost in the same plane to close the air passage of the ventilation fan. When the ventilation fan works, under the action of a couple of centrifugal blocks, the blades rotate around a blade rotary shaft for an angle through a blade angle regulating rotary disk and a blade swinging rod. The ventilation fan mainly comprises an electric motor, a machine frame, a front cover, a blade support disk, a blade angle regulating rotary disk, blades with a rotary shaft and a swinging rod, and a couple of centrifugal blocks. The utility model has the advantages of small starting electric current, high energy utilization rate, and effective prevention of dust from entering rooms and can be widely used in kitchens, toilets, and places needing ventilation in dwelling houses.

Description

Ventilation fan with rotary vanes

The utility model relates to a kind of ventilation fan, particularly relates to a kind of ventilation fan with rotor blade.

Existing ventilation fan mainly contains two kinds, and a kind of is worn-out open type, and this ventilation fan blade is to be fixedly mounted on its rotor, and its ventilation flue is unobstructed, but outdoor dust easily flows into indoor by the air channel.Another kind is the ventilation fan that baffle plate is arranged, and this baffle plate mostly is louvre type.During ventilation fan work, baffle plate is opened; When quitting work, flapper closure.The flabellum of this kind ventilation fan also is to be fixedly mounted on the rotor.Though there have the ventilation fan energy blocks dust of baffle plate to flow into to be indoor, and its ventilation flue resistance is increased, scavenging efficiency is low.In addition, because the flabellum of existing ventilation fan all is to be fixedly mounted on the rotor, the electric motor starting resistance of ventilation fan is just big, and starting current is big.

The purpose of this utility model is to provide a kind of ventilation fan with rotor blade, and this fan can close up blade automatically preventing in the outdoor dust inlet chamber when not working, and starting current is little, energy saving.

The motor of the ventilation fan of the utility model band rotor blade is installed on the frame, and protecgulum and frame snap together and form a ventilation fan air channel.Fixed installation one supporting blades dish on the motor output shaft, blade evenly is contained on the supporting blades dish circle edge rotationally, blade angle modulation rotating disk is housed on the inner convex platform of supporting blades dish rotationally, be provided with a pair of centrifugal in the supporting blades dish outside, described centrifugal relative output shaft symmetric arrangement, on the bearing pin that each centrifugal is contained in outside the supporting blades dish rotationally, centrifugal is provided with one and pulls pin, this curve bath that passes on the supporting blades dish of pulling pin puts in pulling out in the groove on the blade angle modulation rotating disk, described curve bath with pull out groove and intersect, evenly have the groove that equates with blade quantity on the blade angle modulation rotating disk periphery, swing arm on the blade rotor matches with described groove, also be provided with a spring in the supporting blades dish outside, centrifugal center that relies on the supporting blades dish of this spring compressing, when centrifugal under centrifugal action, overcome spring force and make and pull pin when in curve bath, outwards sliding, blade angle modulation rotating disk also rotates an angle, thereby makes blade turn to working state from closed condition.

The utility model compared with prior art can effectively prevent in the dust inlet chamber, the drafting efficiency height, and the electric motor starting electric current is little, saves the energy.

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, so that understand the utility model faster and betterly.

Fig. 1 is the ventilation fan front view of band rotor blade;

The sectional view of Fig. 2 for cutting open along A-A line among Fig. 1;

Fig. 3 is the partial sectional view of the main structure of the ventilation fan of band rotor blade;

Fig. 4 be B along Fig. 3 to view, the fan blade lid is removed;

Fig. 5 is the front view of the blade angle modulation rotating disk of the ventilation fan of band rotor blade;

The sectional view of Fig. 6 for cutting open along the C-C line among Fig. 5;

Fig. 7 is the front view of blade;

Fig. 8 is the side view of blade;

Fig. 9 is a centrifugal front view;

Figure 10 is the side view of Fig. 9.

With reference to accompanying drawing, the ventilation fan of band rotor blade of the present utility model, it is mainly by frame 1, protecgulum 2, motor 23, supporting blades dish 6; Blade angle modulation rotating disk 9, a pair of centrifugal 10 and blade 3 compositions.Frame 1 and protecgulum 2 snap together and form a ventilation fan air channel 5.Supporting blades dish 6 is fixed on the motor output shaft 12 by pin 13 and fan blade lid 4.Blade 3 evenly is housed on the circle edge of supporting blades dish 6 rotationally.Four peripheries of blade 3 all are arc, and whole blade 3 also is arc (with reference to Fig. 7, Fig. 8).Blade angle modulation rotating disk 9 is housed on the inner convex platform 14 of supporting blades dish 6 rotationally.Blade angle modulation rotating disk 9 is provided with two relative grooves 21 that pull out, and also evenly is provided with the groove that equates with blade 3 numbers on its periphery, and in the present embodiment, blade is 6.Be provided with a pair of centrifugal 10 in the outside of supporting blades dish 6, described centrifugal 10 relative output shaft 12 symmetric arrangement.On the bearing pin 11 that each centrifugal 10 is contained in supporting blades dish 6 outsides rotationally.Be provided with one for centrifugal 10 and pull pin 16, these 16 curve baths 19 that pass on the supporting blades dish 6 of pulling pin put in pulling out in the groove 21 on the blade angle modulation rotating disk 9.Also be provided with a spring 18, this centrifugal 10 center that relies on supporting blades dish 6 of spring 18 compressings.The groove 21 that pulls out on curve bath 19 on the supporting blades dish 6 and the blade angle modulation rotating disk 9 intersects.Blade 3 is provided with a blade rotor 7, and this blade rotor 7 is rotationally connected with supporting blades dish 6.Also be provided with swing arm 8 on blade rotor 7, this swing arm 8 matches with groove 22 on the blade angle modulation rotating disk 9.Also be provided with on the supporting blades dish 6 with blade angle modulation rotating disk 9 peripheries on groove 22 corresponding grooves 20, swing arm 8 ends on the blade also reach in this groove 20.Blade 3 is closing up the 2-4% that overlaps each other when closing the air channel.One back-up ring 15 also is housed on the inner convex platform 14 of supporting blades dish, is used to prevent moving axially of blade angle modulation rotating disk 9.In the footpath of output shaft 12 pin 13 is housed upwards, the radial groove on the inner convex platform 14 of this pin 13 and supporting blades dish 6 matches, so that supporting blades dish 6 is rotated with output shaft 12.It is covered with fan blade lid 4 centrifugal 10 front, this fan blade lid 4 is threaded with the output shaft front end, and is fastened on the supporting blades dish 6.

When motor 23 work, driven by motor supporting blades dish 6 rotates, and centrifugal 10 is also rotated together, and under action of centrifugal force, the power that overcomes spring 18 makes centrifugal 10 and outwards swing around bearing pin 11, and pulling pin on centrifugal 10 16 outwards slided along curve bath 19 at this moment.Make blade angle modulation rotating disk 9 rotate an angle around inner convex platform 14, blade angle modulation rotating disk 9 also drives 8 swings of blade oscillating bar, thereby makes blade 3 rotate an angle around its rotating shaft 7.Thereby make blade 3 turn to working state from closed condition.Because motor 23 is when starting, blade 3 is closed, and does not almost have what resistance, and therefore, motor 23 starting currents are little.Like this, when selecting motor, can select lower-powered motor.When motor cuts off the power supply, output shaft 12 also stops operating with supporting blades dish 6, at this moment, centrifugal 10 on the outer lug boss 17 that leans against supporting blades dish 6 under the effect of spring 18, rotate by the 16 drive blade angle modulation rotating disks 9 of pulling pin on centrifugal 10, close ventilation flue 5 thereby make 8 backswing of blade oscillating bar that blade 3 is closed up.

Claims

1, a kind of ventilation fan with rotor blade, it is characterized in that motor is installed on the frame, protecgulum and frame snap together and form a ventilation fan air channel, fixed installation one supporting blades dish on the motor output shaft, the equal heart of blade is contained on the supporting blades dish circle edge rotationally, blade angle modulation rotating disk is housed on the inner convex platform of supporting blades dish rotationally, be provided with a pair of centrifugal in the supporting blades dish outside, described centrifugal relative output shaft symmetric arrangement, on the bearing pin that each centrifugal is contained in outside the supporting blades dish rotationally, centrifugal is provided with one and pulls pin, this curve bath that passes on the supporting blades dish of pulling pin puts in pulling out in the groove on the blade angle modulation rotating disk, described curve bath with pull out groove and intersect, evenly have the groove that equates with blade quantity on the blade angle modulation rotating disk periphery, swing arm on the blade rotor matches with described groove, also be provided with a spring in the supporting blades dish outside, this centrifugal center that relies on the supporting blades dish of spring compressing, when centrifugal under centrifugal action, overcoming spring force makes and pulls pin in curve bath when outwards sliding, blade angle modulation rotating disk also rotates an angle, thereby makes blade turn to working state from closed condition.

2, ventilation fan according to claim 1, it is characterized in that also being provided with on the supporting blades dish with blade angle modulation rotating disk periphery on the corresponding groove of groove, the blade oscillating boom end also reaches in this groove.

3, ventilation fan according to claim 1, its special sheet are that four peripheries of described blade all are arc, and whole blade also is an arc.

4, ventilation fan according to claim 1 is characterized in that closing up the 2-4% that overlaps each other when cutting out the air channel at blade.

5, ventilation fan according to claim 1 is characterized in that on the inner convex platform of supporting blades dish a back-up ring being housed also, is used to prevent moving axially of blade angle modulation rotating disk.

6, ventilation fan according to claim 1 is characterized in that output shaft directly upwards adorns a pin, and the radial groove on the inner convex platform of this pin and supporting blades dish matches, so that the supporting blades dish is rotated with output shaft.

7, ventilation fan according to claim 1 is characterized in that centrifugal front covers it with fan blade lid, and this fan blade lid is threaded with the output shaft front end, and is fastened on the supporting blades dish.