CN2697361Y

CN2697361Y - Centrifugal type radiation fan structure for office facilities

Info

Publication number: CN2697361Y
Application number: CN 200420007409
Authority: CN
Inventors: 饶振奇
Original assignee: Forcecon Technology Co Ltd
Current assignee: Forcecon Technology Co Ltd
Priority date: 2004-03-17
Filing date: 2004-03-17
Publication date: 2005-05-04
Anticipated expiration: 2014-03-17

Abstract

The utility model provides a centrifugal type radiation fan structure for office facilities, comprising a shell, a rotating seat, a blade and a connecting ring. The rotating seat is pivotally arranged on a support seat board on the bottom end of the shell in group; the top surface of the rotating seat is relative to the main air inlet of the air inlet cover of the top end of the shell; the centrifugal type radiation fan structure for office facilities is characterized in that: the blade takes the width-form distribution and allocation state of the long blade and the short blade, and moreover, wherein, the long blade is connected with the rotating seat and the connecting ring; the short blade is clamped between the two long blades and the short blade and is caused to be fixedly connected with the connecting ring to take an integral form; the connecting ring is positioned above the blade which is the top side of the rotating seat; the blade surfaces of the long blade and the short blade are parallel to the axial direction of the rotating seat; the efficiency and the purpose of the centrifugal type radiation fan structure for office facilities are that: the centrifugal type radiation fan structure for office facilities can reduce the back flow, increases the air flow work applying and hoists the electric fan performance.

Description

The centrifugal cooling fan structure of business machine

Technical field

The relevant centrifugal cooling fan structure of a kind of business machine of the utility model is meant the innovation structure space kenel design partly of its flabellum especially.

Background technique

Centrifugal fan is to utilize centrifugal force to the gas work done, advance producing the effect that gas flows towards predetermined direction, with mat its as carrying or reaching heat sinking function; The main direct of travel of this air-flow is radially to leave fan through blade along the commentaries on classics again that axially enters of rotatingshaft, in this process, there is two main backflows (Circulation) district will influence fan performance, the first is at axial section, air-flow is by in the axial commentaries on classics process radially, form axial vane surface in the flabellum upper end by fan inlet lid side easily and reflux, shown in arrow A among Fig. 7; It two is at section radially, because the flaring angle of two vane channels, and forms sagittal plane easily and refluxes because of rotating the inertia effect that is caused, shown in arrow B among Fig. 6; For axial vane surface refluxed, air-flow was refluxed by the more little easy more generation axial vane surface in axial commentaries on classics space radially, and according to this, for stressing compact information products, extremely under the limitation situation, axial vane surface refluxes and almost is difficult to avoid in the space; And with regard to sagittal plane refluxes, therefore its backflow phenomenon of wide runner will generally can increase blade to form narrower runner as one feels fit greater than narrow runner; According to above-mentioned principle, below stated with regard to the existing problem points of several common known centrifugal cutter structures:

It is first for example shown in Figure 4, and feature comprises short blade 51, be bonded to the connecting ring 52 of short blade below and in order to link the connection rib 54 of wheel hub 53 and connecting ring 52; The existing problem points of this kind of conventional construction is: one, this connection rib 54 are almost vertical with the air intake air-flow, therefore can produce the counter productive that cutting is blocked to air-flow; Two, connecting ring 52 places the flabellum below, the function of having only the set short blade, and it is positioned at the turning point that air-flow imports just, the smoothness of air-flow is caused the interference of certain degree, make on the runner except the backflow phenomenon that air intake flap 55 inboards are produced the loss that more these connecting rings 52 are caused.

The second routine conventional construction as shown in Figure 5, its feature mainly is to combine axial flow flabellum 60 these positions, its connecting ring 61 then has group and is located at the enforcement aspect of upper, middle and lower side; The existing problem points of this kind of conventional construction is that this axial flow flabellum 60 perhaps is a pressure of wanting to increase the fan wind inlet, use the raising fan performance, but in limited axial space, the powerful vortex shape air-flow that axially reaches that this axial flow flabellum 60 is caused, to upset the inlet flow field of centrifugal flabellum on the contrary, and cause effect poorer than simple centrifugal flabellum on the contrary.

The known cooling fan structure of the 3rd class that disclosed of Fig. 6,7 for another example, its feature is that mainly the blade of this fan comprises the long and

short blade

71,72 of width of cloth shape arranged spaced, this connecting ring 73 then is positioned at those flabellums belows; Existing problem points of this kind of conventional construction and aforementioned first example have identical point, promptly be that this connecting ring 73 places the flabellum below that the function of set short blade 72 is only arranged, and its smoothness to air-flow causes the interference of certain degree, make on the runner except the backflow A phenomenon that air intake flap 74 inboards are produced the loss that more connecting rings 73 are caused.

Thus, at the existing problem points of the known centrifugal radiation fan of above-mentioned each money, how to integrate its advantage, develop the new structure that has more desirable practicability, the industry that remains in fact to be correlated with is developed breakthrough.

Summary of the invention

The technical problem that the utility model desire solves: mainly be that the problem points that the blade structure at known centrifugal radiation fan still exists is improved breakthrough, reflux, promote the air-flow work done to reduce and import smoothness, promote fan performance.

The technological scheme of dealing with problems: the centrifugal cooling fan structure of a kind of business machine, it comprises a housing, a rotary seat, some blades and connecting ring; Wherein this rotary seat pivot group is on the support seat board of housing bottom, and the end face of the rotary seat then main air inlet with housing top air intake flap is relative; Its technical characterstic comprises: those blades are long and short blade width of cloth shape configuration status spaced apart, and wherein linear leaf connects rotary seat and connecting ring, and short blade then is located between two linear leafs and makes it be fixed in connecting ring and is Construction integration; This connecting ring is positioned at the blade top, also be the top side of rotary seat, and the interior ring edge of this connecting ring is relative with the main air inlet edge of housing; The blade face of this long and short blade all with the parallel to an axis of rotary seat.

The effect of contrast prior art:

The centrifugal radiation fan of the business machine that the utility model disclosed, mainly be to be that deviated splitter vane distribution and linear leaf connect rotary seat and connecting ring by this blade, short blade is located between linear leaf and makes it be fixed in blade face that connecting ring and connecting ring be positioned at the blade top and make relative and the long and short blade in the main air inlet edge of connecting ring interior ring edge and housing all forms design with the structure of the parallel to an axis of rotary seat, advances the practical effect and the purpose that reduce backflow, enhancement air-flow work done and importing smoothness, lifting fan performance to reach.

Description of drawings

Fig. 1 is an exploded perspective view of the present utility model.

Fig. 2 is top plan view of the present utility model (not comprising housing).

Fig. 3 is an assembled sectional view of the present utility model.

Fig. 4 is the exploded perspective view of the first routine conventional construction.

Fig. 5 is the exploded perspective view of the second routine conventional construction.

Fig. 6 is the top plan view of the 3rd routine conventional construction.

Fig. 7 is the assembled sectional view of the 3rd routine conventional construction.

The component symbol explanation

10 ... housing 11 ... support seat board

12 ... air intake flap 13 ... main air inlet

20 ... rotary seat 30 ... connecting ring

31 ... interior ring edge 41 ... linear leaf

42 ... short blade

Embodiment

Further understand and understanding for your auditor can be had the purpose of this utility model, feature and effect, cooperate graphic detailed description now as back:

At first, consult shown in Fig. 1,2,3, be the preferred embodiment of business machine of the present utility model with centrifugal cooling fan structure, it comprises a housing 10, a rotary seat 20, some blades and connecting ring 30; Wherein these rotary seat 20 pivot groups are on the support seat board 11 of housing 10 bottoms, and the end face of the rotary seat 20 then main air inlet 13 with housing 10 top air intake flaps 12 is relative; Its feature comprises:

Those blades are that linear leaf 41, short blade 42 are width of cloth shape configuration status spaced apart, and wherein, each linear leaf 41 connects rotary seat 20 and connecting

ring

30, and 42 of short blades are located in 41 of two linear leafs and make it be fixed in connecting ring 30 and are Construction integration;

This connecting ring 30 is positioned at the blade top, also is the top side of rotary seat 20, and makes the interior ring edge 31 of this connecting ring 30 relative with main air inlet 13 edges of housing 10;

The blade face of this long and

short blade

41,42 all with the parallel to an axis of rotary seat 20.

Wherein, can be provided with a short blade 42 to plural groups between this two linear leaf 41.

It is true as follows that the utility model effect is promoted:

1. the utility model is by a knot to plural groups short blade 42 is set between two linear leafs 41 The structure characteristics can reach the advantage of taking into account low backflow and the resistance of low air intake.

With the first case conventional construction comparatively speaking, the utility model connects rotating seat 20 and connecting ring 30 be exactly blade itself, the blade face is close with the inlet air flow angle, therefore it is harmless right to possess linkage function The effect of air-flow work done; Except this, be arranged at the structural design of blade top by this connecting ring 30, make It is sitting at backflow place of main air inlet 13, so that lacked the interference loss of connecting ring in the runner, and anti-And because of these connecting ring 30 close formed anchor ring of air intake lid gaps, reduced flabellum outlet high-pressure spray To the leakage rate of flabellum import low-pressure area, make this connecting ring 30 itself avoid asking of extra interference gas channel Topic, more effects that reduce flow leakage, real in negative function being transferred to the good behaviour of positive function.

With the second case conventional construction comparatively speaking, the utility model unanimously adopts the knot of centrifugal type inpeller The configuration attitude can be kept well smoothly inlet streams state.

4. the conventional construction that discloses with Fig. 4,5 comparatively speaking, the structure kenel of this long and short blade Though identical, the difference that the utility model is located at the blade top by connecting ring 30 designs, and makes connection Ring 30 is sitting at backflow place of main air inlet 13, so that lacked the interference loss of connecting ring in the runner, And reduced flabellum outlet height because of this connecting ring 30 near the formed anchor ring of air intake lid gap on the contrary Baric flow is to the leakage rate of flabellum import low-pressure area, and it is logical to make this connecting ring 30 itself avoid the extra interference air-flow The problem in road, more effect and advantages that reduce flow leakage.

Claims

1. centrifugal cooling fan structure of business machine, it comprises a housing, a rotary seat, some blades and connecting ring; Wherein this rotary seat pivot group is on the support seat board of housing bottom, and the end face of the rotary seat then main air inlet with housing top air intake flap is relative; It is characterized in that: those blades are long and short blade width of cloth shape configuration status spaced apart, and wherein linear leaf connects rotary seat and connecting ring, and short blade then is located between two linear leafs and is fixed in connecting ring and is Construction integration; This connecting ring is positioned at the blade top, also be the top side of rotary seat, and the interior ring edge of this connecting ring is relative with the main air inlet edge of housing; The blade face of this long and short blade all with the parallel to an axis of rotary seat.

2. the centrifugal cooling fan structure of business machine according to claim 1 is characterized in that: be provided with a short blade to plural groups between this two linear leaf.