CN203146371U

CN203146371U - Minitype centrifugal fan

Info

Publication number: CN203146371U
Application number: CN 201320117077
Authority: CN
Inventors: 翁卫国; 蒋佳卫
Original assignee: SHANGHAI AEOLUS VENTILATION EQUIPMENT CO Ltd
Current assignee: SHANGHAI AEOLUS VENTILATION EQUIPMENT CO Ltd
Priority date: 2013-03-14
Filing date: 2013-03-14
Publication date: 2013-08-21
Anticipated expiration: 2023-03-14

Abstract

The utility model discloses a minitype centrifugal fan which comprises a volute and an impeller. The impeller is arranged in the volute. An air inlet is formed in the side face of the volute. An air outlet is formed in the circumferential face of the volute, and a motor for driving the impeller is arranged on the other side face, opposite to the air outlet, of the volute. The impeller comprises a center plate, an annular cover plate and blades, wherein the blades are circumferentially distributed and connected between the center plate and the annular cover plate. Inserting holes are evenly distributed at the blade installing positions in the center plate and the annular cover plate at intervals. Protruding inserting heads are arranged on two end portions of each blade, the inserting heads are inserted into the inserting holes and are bent to form pressing heads, and the center plate and the annular cover plate are clamped tightly by the pressing heads and the end portions of the blades. The minitype centrifugal fan has the advantages that the impeller is assembled conveniently, and assembling efficiency is high.

Description

A kind of micro-centrifugal fan

Technical field

The utility model belongs to the blower fan technical field, relates in particular to a kind of micro-centrifugal fan.

Background technique

Centrifugal blower is the critical component in ventilation equipment or the ventilation system.Micro-centrifugal fan usually by spiral case, be located at impeller in the spiral case and the motor of drives impeller constitutes.Wherein, draught fan impeller by mid-game, ring-like cover plate and be connected mid-game and ring-like cover plate between circumferential blade constitute.

In the micro-centrifugal fan of prior art, being connected between the blade of impeller and mid-game and the ring-like cover plate is that the mode operation easier of welding is big, and inefficiency by the mode of welding.

In addition, for realizing being connected with the live axle of motor, has reel at the center of mid-game.The reel volume ratio is less and smooth, and pinch can't the application of force with holding, when blower fan assembles, workman's hand can only grasp other parts of blower fan, but owing in the micro-centrifugal fan impeller, no matter be mid-game, ring-like cover plate, or blade, all be to adopt sheeting material to make, therefore, in the assembly process, the necessary extreme care of workman, the person can not make and impeller generation deformation cause quality of product to go wrong.

The model utility content

For this reason, technical problem to be solved in the utility model provides a kind of impeller and assembles micro-centrifugal fan easily, to overcome the deficiency that prior art exists.

For solving the problems of the technologies described above, the utility model adopts following technological scheme:

A kind of micro-centrifugal fan, comprise spiral case, be located at the impeller in the spiral case, the side of described spiral case has intake grill, has exhaust outlet on the side face of described spiral case, described spiral case has the motor of drives impeller with respect to the another side of exhaust outlet, described impeller includes mid-game, ring-like cover plate and be connected mid-game and ring-like cover plate between circumferential blade, it is characterized in that: described mid-game and ring-like cover plate evenly are intervally distributed with jack at blade mounting point circumference, the two end part of described blade have outstanding plug, described plug inserts in the described jack and the bending back forms pressure head, and the end of described pressure head and described blade tightens described mid-game and ring-like cover plate.

Described plug is positioned at the neutral position of the end of described blade.

For the plug that makes things convenient for blade can insert described jack easily, the top of described plug is semicircle, and described jack centre is wide, two is narrow.

Adopt technique scheme, centrifugal blower of the present utility model only needs the plug of blade is inserted the jack of mid-game and ring-like cover plate when assembling, and the plug that bends then just can be realized being connected of blade and mid-game and ring-like cover plate.Therefore, it is easy to assembly that micro-centrifugal fan of the present utility model has impeller, the advantage that packaging efficiency is high.

In addition, the central position of described mid-game is connected with reel, for the sheet material of realizing not grasping impeller just can grasp impeller and can the application of force, avoids causing the distortion of impeller, has groove on the circumferential surface of described reel.

Be convenient processing, described groove is the circular groove along the circumference extension of reel.

In addition, have pin-and-hole in the described circular groove, also be provided with pivot pin in the described pin-and-hole.Pivot pin is used for pressing closer the axle of motor, realizes that the axle of reel and motor is fastenedly connected.

Description of drawings

Below in conjunction with accompanying drawing and concrete enforcement the utility model is elaborated:

Fig. 1 is the structural representation of micro-centrifugal fan;

The side view of Fig. 1 of Fig. 2;

Fig. 3 is the novel structural representation of the utility model;

Fig. 4 is the side schematic view of Fig. 3.

Fig. 5 is the structural representation of mid-game;

Fig. 6 is ring-like structure of cover plate schematic representation;

Fig. 7 is the structural representation of blade;

Fig. 8 is the structure of reel.

Among the figure:

The 10-spiral case, 11-intake grill, 12-exhaust outlet, 20-motor, the 30-impeller, 40-protective housing, 100-mid-game, 101-center hole, the ring-like cover plate of 200-, 300-blade, 400-reel, 401-end face, 403-prolong ring limit, 404-crimping, the 500-circular groove, 601-pin-and-hole, 602-bearing pin, the 701-jack, 702-plug, 703-pressure head.

Embodiment

As depicted in figs. 1 and 2, micro-centrifugal fan of the present utility model is made of spiral case 10, motor 20, impeller 30 and protective housing 40.

Wherein, one of them side of spiral case 10 has intake grill 11, is covered with protective housing 40 on this intake grill, on the side face of spiral case 10 (namely perpendicular to the air intake direction) exhaust outlet 12 is arranged.Impeller 30 is installed in the spiral case 10, and motor 20 is installed in the another side of the spiral case 10 relative with intake grill 11, and its axle is connected with impeller 30.

As shown in Figure 3 and Figure 4, impeller 30 include mid-game 100, ring-like cover plate 200 and be connected mid-game and ring-like cover plate 200 between circumferential blade 300.Be connected with reel 400 at mid-game 300 internal surface centers.

As shown in Figure 5 and Figure 6, be distributed with jack 701 in mid-game 100 with the position circle weekly interval that ring-like cover plate 200 is positioned at the blade 300 that is connected, the centre of jack 701 is wide, and two is narrow.As shown in Figure 7, have outstanding plug 702 in the neutral position at the two end part of blade 300, the top of plug 702 is semicircle.

In conjunction with shown in Figure 3, when blade 300 is connected with ring-like cover plate 200 with mid-game 100, be that plug 702 with blade 300 inserts in the jack 701 of mid-games 100 and ring-like cover plate 200, then plug is bent, the surface that is attached to mid-game 100 and ring-like cover plate 200 forms pressure head 703, and pressure head 703 tightens mid-game 100 and ring-like cover plate 200 with the end of blade 300.

Fig. 3 is in conjunction with shown in Figure 8, for the sheet material of realizing not grasping impeller just can grasp impeller and can the application of force, reel 400 has the circular groove 500 that extends along circumference at circumferential surface, has pin-and-hole 601 in this circular groove 500, be provided with pivot pin 602 in the pin-and-hole 601, this pivot pin 602 is used for holding out against the axle of motor.

In micro-centrifugal fan of the present utility model, only need the plug of blade is inserted the jack of mid-game and ring-like cover plate during the impeller assembling, the plug that bends then just can be realized being connected of blade and mid-game and ring-like cover plate, have easy to assembly, the advantage that packaging efficiency is high.In addition, the utility model also has by grasping the advantage that the reel application of force does not cause the impeller distortion.

Claims

1. micro-centrifugal fan, comprise spiral case, be located at the impeller in the spiral case, the side of described spiral case has intake grill, has exhaust outlet on the side face of described spiral case, described spiral case has the motor of drives impeller with respect to the another side of exhaust outlet, described impeller includes mid-game, ring-like cover plate and be connected mid-game and ring-like cover plate between circumferential blade, it is characterized in that: described mid-game and ring-like cover plate evenly are intervally distributed with jack at blade mounting point circumference, the two end part of described blade have outstanding plug, described plug inserts in the described jack and the bending back forms pressure head, and the end of described pressure head and described blade tightens described mid-game and ring-like cover plate.

2. micro-centrifugal fan according to claim 1, it is characterized in that: described plug is positioned at the neutral position of the end of described blade.

3. micro-centrifugal fan according to claim 1 is characterized in that: the top of described plug is for semicircle, and is wide in the middle of the described jack, two is narrow.

4. micro-centrifugal fan according to claim 1, it is characterized in that: the central position of described mid-game is connected with reel, has groove on the circumferential surface of described reel.

5. micro-centrifugal fan according to claim 4 is characterized in that: the circular groove that described groove extends for the circumference along reel.

6. micro-centrifugal fan according to claim 5 is characterized in that: have pin-and-hole in the described circular groove, also be provided with pivot pin in the described pin-and-hole.