CN2374678Y

CN2374678Y - Two-way fan

Info

Publication number: CN2374678Y
Application number: CN 99226496
Authority: CN
Inventors: 柴岩芝
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-04-30
Filing date: 1999-04-30
Publication date: 2000-04-19
Anticipated expiration: 2009-04-30

Abstract

The utility model relates to the improvement of the structure of a blower. The utility model is mainly formed in the method that the arrangement mode of blades of the existing centrifugal impeller is changed into the arrangement mode that forward blades and the backward blades are in staggered arrangement; for example, the insides of the forward blades and the backward blades are connected together, and lambdoid shapes can be formed; a volute casing outside the forward blades and the backward blades is a coaxial bidirectional volute casing, and the volute casing is provided with ventilation wind duct and a flow guide wind chamber. So the utility model has the advantages that the structure is reasonable, the wind pressure and the efficiency of the running in the forward direction or in the backward direction are both high, the fabrication of the blades is comparatively simple, the stress is reasonable, etc. The utility model is particularly suitable for being as a warm air blower having the advantages of compact structure, beautiful appearance, comfort, and high practicality.

Description

Two-way blower fan

The utility model relates to a kind of structure improvement of blower fan, especially relates to a kind of forward and reverse equal energy and produces higher blast and two-way efficiently centrifugal fan.

Blower fan mainly contains axial-flow blower (as ventilation fan, axial flow cooker hood etc.) and centrifugal fan (as blower, centrifugal cooker hood etc.).The former is applicable to blast, the occasion that wind speed is lower usually, and the latter is applicable to blast, distinguished and admirable higher occasion more, but its impeller all adopts coaxial design in the same way.Therefore, press the impeller of forward design, when being used as inverted running, the efficient of its ventilation (or air blast) greatly descends.

Simultaneously, the spiral case of existing centrifugal fan adopts unidirectional Archimedes spiral design.Therefore, when dynamic power machine impeller such as motor were made antiport, decreased performance such as its flow, blast were more obvious.

Goal of the invention of the present utility model is gram eye the deficiencies in the prior art, provides a kind of rational in infrastructure, can carry out efficiently forward and reverse ventilation from the formula two-way blower fan.

Another goal of the invention of the present utility model provides a kind of equating efficiently by impeller tangent direction change gear gas and carry out the changes in temperature wind circulation of higher blast by the axial direction of impeller and the uniform two-way blower fan of air-out.

The 3rd goal of the invention of the present utility model is structural feature and the improvement demand in conjunction with bathroom heating device, and a kind of compact structure is provided, the thermal efficiency and blower fan conversion efficiency height, and outward appearance is beneficial to the two-way blower fan that is applicable to heating (ventilation) device of symmetry, design for aesthetic.

Major scheme of the present utility model is: the blade system of the receded disk impeller of blower fan is staggered by some forward blade backward vanes and forms.Described be staggered can be 1 or several forwards (counterclockwise) blade and 1 or several reverse (clockwise) blades alternately, forward can equate with the reverse number of blade, also can unequal (as the ratio in 3: 1) be provided with.

A kind of comparatively typical impeller design scheme is: to be the forward blade intersects partition with backward vane to the blade of described impeller arranges, and two paired blades inboard is continuous, and its cross section is man type; Described spiral case is the coaxial two-direction spiral case, which is provided with a ventilation air channel and another commutation water conservancy diversion air compartment, and both export vertical mutually or are provided with two ventilation air channels parallel to each other.The former can rely on commutation diversion chamber, water conservancy diversion, change wind direction; The latter two ventilation air channels are all tangent with impeller, also can connect the elbow of required camber or shape etc. when needing on it takes a breath the air channel.

Tie up to owing to the air-flow in the utility model spiral case that the centrifugal action of the windward blades of rotary blade produces down.So the wind speed everywhere that enters on commutation water conservancy diversion air compartment or the ventilation duct cross-section is also inconsistent.Therefore, if this air-flow is carried out water conservancy diversion with passages such as bend pipes simply, will certainly turbulization in passage etc., this not only will cause the loss of blast and flow, and make the heater element heat radiation irregular and cause reducing the thermal efficiency, influence working life.For this reason, can in described commutation water conservancy diversion air compartment, be provided with orthogonal commutation inclined-plane and even wind inclined-plane.Wherein said two inclined-planes also can be curved surfaces such as cambered surface, spherical calotte except the plane.For curved surface, the tangent plane of the described center region that mutually vertically is meant this two curved surface is vertical substantially each other.

Two-way blower fan described in the utility model can be applicable to occasions such as industry, constructure ventilation, is particularly useful for conversion ventilation at any time or occasions such as air blast direction, flow path.For example, to combine with heater element by the two-way blower fan of motor direct-drive, design novel heating installation device, it can be provided with the changes in temperature air channel on the interior outside of the box body wall that is connected with spiral case, and it is built-in with electrical heating element (ceramic heating element, electric heating tube, quartz tube etc.).A kind of preferable scheme can also be that described changes in temperature air channel can be by lead air channel and add hot-flow flue and form of convergent; Describedly add the inboard that hot-flow flue is located at rectangular box, its electrical heating element that is built-in with by the insulating trip that is arranged in parallel with the air channel and evenly dish electric heating wire placed on it constitute.

In addition, impeller adjacent blades outer rim gap h is 1 with the ratio of the spacing H of every pair of blade inboard: 1.5-2.5; And the interior outside of blade is the circular arc cylinder; The chord length 1 of blade is 1 with the ratio of its height L: 4-6.

Therefore, the utlity model has rational in infrastructure, can equate at any time just carrying out efficiently, oppositely ventilation, Blade Design is simpler, stressed comparatively reasonable, design for Injection Mould is made comparatively simple, just, reverse pressure, characteristics such as wind speed is all higher and basic identical, especially commutation water conservancy diversion air compartment that in snail body of the present utility model, is provided with and the changes in temperature air channel that is provided with heater element, make air under the wind speed about 8m/s, more evenly blow electric heating element through little windages such as electric heating wire, and vertical high speed is blown downwards near ground, thereby make the lighter warm air of proportion diffuse to room to be heated rapidly, make room temperature even, the generation of non-uniform phenomenons such as no thermocline.When ambient temperature is 13 ℃, heating element electric power 2000W is to 2.5m ²The bathroom heat, promptly be warming up to 28 ℃ in 20 minutes, temperature can reach 32 ℃ in 30 minutes, and can at any time foul air be drained into fast outdoorly, built that air is fresh, gentle, comfortable environment.In addition, add hot-flow flue and place a side in the rectangular box, and the structural design of face shield such as lampshade, wind canopy, the warm-air drier that makes utilization the utility model blower fan make also has compact structure simultaneously, and cost is lower, good quality, the design model novelty, beautiful shape meets characteristics such as dwelling house decoration design trend, is a kind of to the heat desirable substitute products of electric heating appliance of existing infrared bulb or quartz tube illumination heating device (as super bath) and electric heating tube.

Fig. 1 is the structural representation of a kind of impeller of the present utility model;

Fig. 2 is the B-B sectional view of Fig. 1;

Fig. 3 is applied in a kind of structural representation in the heating installation device with the utility model;

Fig. 4 is the A-A part sectioned view of Fig. 3.

Below by embodiment, structure of the present utility model and typical application are described specifically.

Referring to the impeller 1 of the two-way blower fan shown in accompanying drawing 1 and the accompanying drawing 2 is to be made of 22 pairs of man type blades 5 around the impeller boss 3 of being located at central authorities and the uniform impeller and impeller body therebetween 2.Impeller body 2 central indents, and between impeller body and impeller boss, be provided with cross stiffening rib 4.Described blade 5 constitutes by the backward vane 52 of design in the direction of the clock with by the forward blade 51 that counterclockwise designs, and the interior outside of its blade is respectively the circular arc cylinder that radius is 12mm and 13mm.Gap between forward blade 51 adjacent one another are and backward vane 52 outer rims has constituted axial strip air outlet 53, and its spacing h is advisable with 8mm.All structures of above-mentioned impeller 1 can adopt the ABS material to make with the mold integral injection moulding.

Spiral case 7 can adopt two Archimedes spiral designs, and its central authorities are equipped with motor 6, motor shaft with place the impeller boss 3 of the impeller 1 of spiral case inboard directly to join.On the spiral case 7 in impeller 1 outside, be provided with a commutation water conservancy diversion air compartment 71 and ventilation air channel 72.In commutation water conservancy diversion air compartment 71, be provided with commutation inclined-plane 711 and even wind inclined-plane 712 (referring to accompanying drawing 3 and accompanying drawing 4).The opening surface of spiral case 7 is connected with casing 8, and by being located at the convergent guiding air channel 811 of square casing 8 one side inwalls, air-flow is changed its course and evenly blow at high speed, make air and heater element of being located in it evenly fully contacts through the long and narrow air channel 812 of heating of section.Described electrical heating element 9 by the insulating trip 91 that is arranged in parallel with the air channel and evenly dish electric heating wire 92 placed on it constitute.

Foursquare casing 8 adopts the polycarbonate plastic injection moulding to make, and centre is fixed with porcelain lamp holder 95 through support 94 in it, which is provided with lighting burner 88.At the front end of casing 8, be covered with the face shield 86 of square symmetry design, and rely on extension spring 93 and casing 8 to fix.Lighting burner 88 front portions just in time lean out by the hole of face shield 86 central authorities, are provided with lampshade 87 around the hole, are arranged with air grid 85 around it.Blow out vertically downward through the air grid 85 of a side mean wind velocity through the warm braw of electric heating wire heating, lighter warm braw is blown near ground with 8m/s; And enter in the casing 8 in the air grid of the cool air of bathroom (or indoor) by its excess-three side of cover 86, under the effect of the impeller 1 that is rotated counterclockwise, after commutation water conservancy

diversion air compartment

71 and 81 heating of changes in temperature air channel, blow out in the air grid 85 by an above-mentioned side again.The direct brute force of warm air that will be lighter is blown near ground, drives the indoor air major cycle thus, and room temperature is evenly raise.

When indoor air is muddy, press the ventilation switch, make the rotation of motor 1 clockwise direction, make air under the effect of reverse impeller 52, discharge outdoor along the tangent direction of spiral case 7 through ventilation air channel 72.Simultaneously, the air spontaneous current of outdoor cleaning is gone into indoor, can realize the timely replacing of indoor air effectively, easily.

Claims

1, a kind of two-way blower fan includes electric motor driven receded disk impeller and is located at its outer spiral case, and the blade system that it is characterized in that described impeller (1) is staggered by some forward blades (51) and backward vane (52) and forms.

2, two-way blower fan as claimed in claim 1 is characterized in that described impeller (1) blade to be forward blade (51) intersects partition with backward vane (52) arranging, and two paired blades are inboard links to each other, and its cross section is man type; Described spiral case (7) is the coaxial two-direction spiral case, which is provided with a ventilation air channel (72) and another commutation water conservancy diversion air compartment (71), and both openings are vertical mutually.

3, two-way blower fan as claimed in claim 1 it is characterized in that described impeller (1) is forward blade (51) and backward vane (52) cross arrangement, and two paired blades is inboard continuous, and its cross section is man type; Described spiral case (7) is the coaxial two-direction spiral case, which is provided with two ventilation air channels (72) parallel to each other.

4, two-way blower fan as claimed in claim 1 or 2 is characterized in that being provided with in the described commutation water conservancy diversion air compartment (71) orthogonal commutation inclined-plane (711) and even wind inclined-plane (712).

5, as claim 1 or 2 or 3 described two-way blower fans, it is characterized in that on the inwall of the casing 8 that is connected with spiral case (7), being provided with changes in temperature air channel (81), it is built-in with electrical heating element (9).

6, two-way blower fan as claimed in claim 4 is characterized in that being provided with changes in temperature air channel (81) on the inwall of the casing 8 that is connected with spiral case, and it is built-in with electrical heating element (9).

7,, it is characterized in that described changes in temperature air channel (81) is by convergent guiding air channel (811) with add hot-flow flue (812) and form as claim 1 or 2 or 3 described two-way blower fans; Describedly add the inboard that hot-flow flue (812) is located at rectangular box (8), its electrical heating element that is built-in with (9) by the insulating trip (91) that is arranged in parallel with the air channel and evenly dish electric heating wire (92) placed on it constitute.

8, two-way blower fan as claimed in claim 4 is characterized in that described changes in temperature air channel 81 is by convergent guiding air channel 811 with add hot-flow flue 812 and form; Describedly add the inboard that hot-flow flue 812 is located at rectangular box 8, its electrical heating element that is built-in with 9 by the insulating trip 91 that is arranged in parallel with the air channel and evenly dish electric heating wire 92 placed on it constitute.

9,, it is characterized in that impeller (1) adjacent blades outer rim gap h and the ratio of the spacing H of every pair of blade inboard are 1: 1.5-2.5 as claim 1 or 2 or 3 described two-way blower fans; And the interior outside of blade (5) is the circular arc cylinder; The chord length 1 of blade (5) is 1 with the ratio of its height L: 4-6.

10, two-way blower fan as claimed in claim 4 is characterized in that impeller (1) adjacent blades outer rim gap h and the ratio of the spacing H of every pair of blade inboard are 1: 1.5-2.5; And the interior outside of blade (5) is the circular arc cylinder; The chord length 1 of blade (5) is 1 with the ratio of its height L: 4-6.