CN1241248A - Centrifugal blower, method of mfg. same, and air-conditioner provided with same - Google Patents

Centrifugal blower, method of mfg. same, and air-conditioner provided with same Download PDF

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Publication number
CN1241248A
CN1241248A CN98801427A CN98801427A CN1241248A CN 1241248 A CN1241248 A CN 1241248A CN 98801427 A CN98801427 A CN 98801427A CN 98801427 A CN98801427 A CN 98801427A CN 1241248 A CN1241248 A CN 1241248A
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CN
China
Prior art keywords
mentioned
blade
wheel hub
impeller
centrifugal blower
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Granted
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CN98801427A
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Chinese (zh)
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CN1133819C (en
Inventor
佐柳恒久
阪本秀昭
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Daikin Industries Ltd
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Daikin Industries Ltd
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Publication of CN1241248A publication Critical patent/CN1241248A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)

Abstract

A centrifugal blower comprising a vane wheel having a hub, a shroud disposed so as to be spaced at a predetermined distance from and opposed to the hub, and a plurality of vanes extending between an outer circumferential portion of the hub and that of the shroud and arranged substantially radially around the axis of the hub, wherein a rear edge of each of the vanes is formed in a saw-toothed shape having a lengthwise extending wavy edge in which alternate projections and recesses extend in the widthwise direction of the vane. Because this configuration, it can minimize the turbulence of the air flow at the rear edge, and reduce an air supply noise.

Description

Centrifugal blower and manufacture method thereof and air conditioner with this centrifugal blower
Technical field
The invention belongs to blade structure and have the centrifugal blower and the manufacture method thereof of feature and air conditioner with this centrifugal blower.
Background technique
In general, centrifugal blower has impeller, this impeller is by being that the multi-disc blade that the center roughly is radial configuration constitutes between the peripheral part of the guard shield that is fixed on wheel hub on the electric machine rotational axis, disposes in opposite directions with set interval with respect to this wheel hub and peripheral part that is across above-mentioned wheel hub and above-mentioned guard shield and with the axle center of above-mentioned wheel hub, by the rotation of this impeller, produce from the front edge side of above-mentioned blade air-flow to the trailing edge side flow.
In addition, this centrifugal blower, the axial portions of stating impeller thereon is provided with suction port, can around this impeller, blow out by the blow-off outlet that is located at this impeller outer perimembranous from this suction port inhaled air, the suction of this air and the form that blows out, indoor set with air conditioner, particularly be configured in ceiling embedded type on the ceiling or the desired air circulation form of ceiling hanging type air conditioner (promptly, central position from the room sucks air, and it is carried out the form that blows out to indoor whole zone after the air conditioning) consistent, so being used as the used for indoor machine blower more, centrifugal blower is applied.
But in the centrifugal blower, the pressure side and the pressure difference between the suction surface of carrying out on the blade of air blast operation are bigger than the blower of other forms such as axial blower.Therefore, rotation along with impeller, on the pressure side of blade from its leading edge to trailing edge high pressure draught that flows and the low-pressure air current that on suction surface, flows to trailing edge from its leading edge, when the two reaches set counterpressure at interflow, the trailing edge place of this impeller, the pressure gradient at this trailing edge position is big, and correspondingly loss of velocity is also big.And the vane trailing edge of existing general centrifugal blower is shaped as the shape that the shape that is in line extends on the width of blade direction, and therefore, aforesaid loss of velocity takes place on the whole trailing edge of impeller simultaneously.Its result, trailing edge position air turbulence degree strengthens, and produces bigger air blast noise.Therefore, for centrifugal blower, people's strong request realizes its quietization, though past attempts has the people to propose various solutions, does not obtain satisfied result.In addition, the requirement of this quietization, for being equipped with centrifugal blower as the air-conditioning air blast with blower and being disposed at the indoor set of indoor air conditioner, particularly strong.
Disclosure of an invention
, the objective of the invention is to for this reason, provide and can reduce the centrifugal blower of air blast noise and silencing type air conditioner with simple and cheap structure with this centrifugal blower, and, the good manufacture method of this centrifugal blower is provided.
The invention provides a kind of like this centrifugal blower, this centrifugal blower has by the wheel hub that is fixed on the running shaft, dispose and be formed with the guard shield of suction port in opposite directions in its axial portions with set interval with respect to this wheel hub, and be across between the peripheral part of the peripheral part of above-mentioned wheel hub and above-mentioned guard shield and be that the center is the impeller that the multi-disc blade of radial configuration is constituted generally with the axle center of above-mentioned wheel hub, rotation by this impeller, can produce from the front edge side of above-mentioned blade air-flow to the trailing edge side flow, it is characterized in that, above-mentioned vane trailing edge is along the mutual warpage of length of blade direction, simultaneously the zigzag fashion that extends to the width of blade direction.
As this centrifugal blower, because above-mentioned vane trailing edge is the zigzag fashion that extends to the width of blade direction simultaneously along the mutual warpage of length of blade direction, thereby this rear edge part alternately exists long part of length of blade and short part, therefore, flow through above-mentioned blade pressure side air-flow with flow through the air-flow of suction surface, the two is interim and carries out lentamente on the total length of the interflow of hinder marginal part office at this trailing edge.Its result, vane trailing edge is made straight line shape and interflow simultaneous situation on the whole trailing edge of blade of air-flow is compared with for example resembling prior art, the pressure gradient and the loss of velocity of the air-flow that produces because of the interflow of hinder marginal part office air-flow reduce, correspondingly, the disorderly degree of this hinder marginal part office air-flow is inhibited and the air blast noise is reduced.That is,, can realize quietization of centrifugal blower at an easy rate by vane trailing edge being made the simple and cheap like this structure of zigzag fashion.
If a plurality of teeth of the above-mentioned zigzag fashion of formation are respectively triangle roughly, then compare with for example being made into complicated polygon, can make the simple in structure of forming die, correspondingly, can obtain to make the distinctive effect cheap for manufacturing cost of centrifugal blower.
In addition, if it is plane or circular-arc that make the end that will have triangular shaped above-mentioned each tooth, then be the prominent situation of acute angle-shaped point and compare with for example this end, can reduce this end and wait impaired possibility because of fracture, correspondingly, can improve the life-span of centrifugal blower.
In addition, owing to constitute the following setting of above-mentioned each tooth of above-mentioned zigzag fashion, promptly establish its tooth depth for " H ", when tooth pitch is " S ", external diameter " D " with respect to above-mentioned impeller is set at 0.005＜H/D＜0.015 and 0.01＜S/D＜0.02, so can more effectively reduce the air blast noise, further improve the quiet performance of centrifugal blower.
In addition, the invention provides the manufacture method of above-mentioned centrifugal blower.This method is, at first make the wheel hub that will constitute impeller and each blade integrated one-body molded body, then the engaged at end of the above-mentioned blade of above-mentioned one-body molded body fix and this one-body molded body respectively moulding guard shield and obtain the method for impeller.
Above-mentioned one-body molded body is made like this, be used for being provided with in two faces on the thick direction of sheet of the above-mentioned wheel hub of moulding a face of above-mentioned blade the 1st forming die, can relative with the 1st forming die deciliter ground dispose in opposite directions be used for the above-mentioned wheel hub of moulding another face the 2nd forming die and at the position, gap between above-mentioned each blade respectively on the length direction at this blade the configuration of advance and retreat ground, be used for moulding and be located at a plurality of the 3rd forming dies of the above-mentioned zigzag fashion on the above-mentioned vane trailing edge at least;
Above-mentioned the 1st forming die, above-mentioned the 2nd forming die and above-mentioned each the 3rd forming die are set on separately the set assembling position, between above-mentioned each forming die, inject fused raw material in the formed die cavity and make it moulding;
Above-mentioned the 1st forming die and above-mentioned the 2nd forming die are separated from each other and carry out form removal, simultaneously, above-mentioned each the 3rd forming die is moved to the length direction of above-mentioned blade carry out form removal.
If use its structure can't carry out the demoulding (promptly for configuration toward each other and to the manufacture method of the forming die (for example the 1st forming die and the 2nd forming die) of direction in opposite directions deciliter with existing, since with the perpendicular direction of stripping direction on be extended with above-mentioned tooth), so can't realize the moulding of above-mentioned zigzag fashion, and according to the present invention, because being used for the stripping direction of above-mentioned the 3rd forming die of this zigzag fashion of moulding is on the length direction of above-mentioned blade, thereby this zigzag fashion of moulding at an easy rate.Therefore, the situation that obtains above-mentioned one-body molded body with for example above-mentioned wheel hub and each blade being assembled them after the moulding is respectively compared, the manufacturing of above-mentioned one-body molded body and then above-mentioned impeller becomes easily, consequently, can provide centrifugal blower with cheaper price.
And the present invention also provides and adopts above-mentioned centrifugal blower as the air conditioner of air-conditioning air-supply with blower.According to this invention, have the peculiar effect of this centrifugal blower, that is, high quietization is reflected on the ride quality of air conditioner from cover to cover, can provide the quietness can better air conditioner, this effect be that to be arranged on the occasion of indoor indoor set particularly remarkable for this air conditioner.
The simple declaration of accompanying drawing
Fig. 1 is the stereogram of centrifugal blower involved in the present invention.
Fig. 2 is the sectional view with air conditioner of centrifugal blower shown in Figure 1.
Fig. 3 is the enlarged view of the trailing edge portion of centrifugal blower shown in Figure 1.
Fig. 4 is the IV-IV sectional view of Fig. 3.
Fig. 5 is the explanatory drawing of the mould-forming manufacture method of impeller.
Fig. 6 is the VI-VI sectional view of Fig. 5.
The best form of implementation of invention
Below, the form of implementation shown in conjunction with the accompanying drawings is described in detail centrifugal blower involved in the present invention and manufacture method thereof and air conditioner with this centrifugal blower.
Fig. 1 illustrates the impeller 10 of the related centrifugal blower X of form of implementation of the present invention.Fig. 2 illustrates the indoor set Z of the air conditioner with this centrifugal blower X.
Above-mentioned centrifugal blower X as depicted in figs. 1 and 2, by motor 19 with drive the impeller 10 that rotates by this motor 19 and constitute.Above-mentioned impeller 10 has: wheel hub 11, and this wheel hub 11 constitutes by roughly being conical central part 11a, plate shaped flange 11b and assembly department 11c, and its assembly department 11c is fixed on the motor shaft 11a of above-mentioned motor 19; Dispose and be formed with the guard shield 12 of blower suction port 16 in opposite directions at its axis central part with set interval with respect to this wheel hub 11; At the peripheral part of above-mentioned wheel hub 11, specifically be exactly to be across between the peripheral part of the peripheral part of plate shaped flange 11b and above-mentioned guard shield 12 and in a circumferential direction uniformly-spaced to be a plurality of blades 13 of radial configuration.This impeller 10 with the peripheral part of above-mentioned wheel hub 11 and above-mentioned guard shield 12 as blower blow-off outlet 17, simultaneously, with from the path of above-mentioned blower suction port 16 till the above-mentioned blower blow-off outlet 17 as air ventilation path 18.
Above-mentioned wheel hub 11 is that near the position, axle center of the plectane body of set diameter is formed to the moulding of thickness of slab direction depression, as described later, is integrally formed through mould-forming with resin material with blade 13.
Above-mentioned guard shield 12 is for having the ring bodies of circular section, with above-mentioned wheel hub 11 grades be to form through mould-forming with resin material respectively.And, after these guard shield 12 moulding, with engaging fixing with the integrally formed one-body molded body 15 (with reference to Fig. 5 and Fig. 6) of each blade 13 of above-mentioned wheel hub 11.
Above-mentioned blade 13 is for having the plate body of crooked streamline section, as previously mentioned across at the peripheral part of the peripheral part of above-mentioned wheel hub 11 and above-mentioned guard shield 12 between the two and form uniformly-spaced to be radial configuration multi-disc (this form of implementation is 8) in a circumferential direction, form through mould-forming with resin material with above-mentioned wheel hub 11.
In addition, the maximum of this blade 13 is characterised in that the structure of its trailing edge 13b.That is, the blade 13 of this form of implementation is as Fig. 1～Fig. 4 shown in respectively, and its trailing edge 13b resembles to be straight line shape the prior art, but the zigzag fashion 20 that mutual warpage extends to the width of blade direction simultaneously on the length of blade direction.This zigzag fashion 20 is by along trailing edge 13b and continuous tooth 21 constitutes, and this form of implementation further adopts the present invention, the shape that makes this tooth 21 as shown in Figure 3 and Figure 4, the pass of the external diameter " D " of the platform shape that leg-of-mutton end is slightly linearly and the size of this tooth 21 and impeller 10 is: when the tooth depth of this tooth 21 is " H ", tooth pitch during for " S ", have the relation of " 0.005＜H/D＜0.015 " and " 0.01＜S/D＜0.02 ".As this form of implementation, the end 21a of tooth 21 is shown in Figure 4 circular-arc, but also can be plane.
At this, the manufacture method (being the manufacture method of above-mentioned centrifugal blower X) of above-mentioned impeller 10 is described.
As mentioned above, in wheel hub 11, guard shield 12 and a plurality of blade 13 as the component parts of above-mentioned impeller 10, above-mentioned wheel hub 11 is with they one-body molded (one-body molded body 15) with each blade 13, and above-mentioned guard shield 12 is and above-mentioned one-body molded body 15 moulding respectively, after above-mentioned each parts-moulding, above-mentioned guard shield 12 is engaged with above-mentioned one-body molded body 15 (for example welding or bonding) thereby and they are become one obtain above-mentioned impeller 10, this manufacturing step is existing known technology.
But, as existing centrifugal blower, though because the trailing edge 13b of above-mentioned blade 13 is a straight line shape, so during with the above-mentioned one-body molded body 15 of mould-forming, can be by using configuration toward each other and can making at an easy rate to a pair of forming die (for example upper die and lower die) of direction in opposite directions deciliter, but blade 13 its trailing edge 13b of this form of implementation are zigzag fashion 20, therefore, use aforesaid a pair of forming die moulding with this each blade 13 and the one-body molded body 15 that above-mentioned wheel hub 11 is made of one, can't carry out owing to there is the release problems of these zigzag fashion 20 parts.
For this reason, as this form of implementation, the moulding of this one-body molded body 15 is adopted manufacture method of the present invention and is made with following 3 kinds of forming dies (be counterdie 31, patrix 32 and a plurality of deviate from mould 33).
Above-mentioned counterdie 31 as shown in Figure 5 and Figure 6, it is a kind of like this forming die, have promptly that the moulding of being used for is provided with the wheel hub internal surface forming surface 31a that states blade 13 sides on the above-mentioned one-body molded body 15, the blade forming face 31b of the leading edge 13a that is used for the above-mentioned blade 13 of moulding and for described later deviate from that mould 33 keeps embedded spaces deviate from mould embedding part 31c, corresponding with " the 1st forming die " in the claim.
Above-mentioned patrix 32 is for to have the forming die that the moulding of being used for is not provided with the hub outside surface forming surface 32a that states blade 13 sides on the above-mentioned one-body molded body 15, and is corresponding with " the 2nd forming die " in the claim.
Above-mentionedly deviate from mould 33 and have: be configured in and state sawtooth forming surface 33a between each blade 13, that be used for the above-mentioned zigzag fashion 20 of moulding on the above-mentioned one-body molded body 15, and be used for the blade forming face 33b of trailing edge 13b part of the above-mentioned blade 13 of moulding as forming die; Corresponding with " the 3rd forming die " in the claim.
Above the wheel hub internal surface forming surface 31a of above-mentioned counterdie 31, the attitude of pointing to above-mentioned counterdie 31 sides with its hub outside surface forming surface 32a disposes above-mentioned patrix 32, this patrix 32 can be with respect to above-mentioned counterdie 31 to direction in opposite directions deciliter, and, above-mentionedly deviate from respectively that mould 33 is following respectively to be configured between above-mentioned counterdie 31 and the patrix 32, promptly and the perpendicular direction of the direction in opposite directions of this counterdie 31 and patrix 32 on and respectively deviating from by this mould 33 state between each blade 13 on the above-mentioned one-body molded body 15 of moulding respectively.By each forming die 31,32 and 33 of such configuration, just between them, formed and be used for the die cavity of the above-mentioned one-body molded body 15 of moulding.Therefore, the resin raw material of injection fusion is plastic above-mentioned one-body molded body 15 in this die cavity.
Inject after this resin material and moulding be over, respectively with each forming die 31,32 and 33 form removals.At this moment, above-mentioned patrix 32 is to move towards the direction that is separated with above-mentioned counterdie 31 and realize form removal.And above-mentioned respectively to deviate from mould 33 be to move to the side by the length of blade direction along above-mentioned blade 13 to carry out form removal.By this forming method, although above-mentioned one-body molded body 15 is for the trailing edge 13b of above-mentioned each blade 13 has the form of zigzag fashion 20, still can moulding at an easy rate by this one-body molded body 15 of moulding.After above-mentioned one-body molded body 15 moulding, above-mentioned guard shield 12 engaged on the end 22 of being fixed in above-mentioned each blade 13 and obtain above-mentioned impeller 10.
As above among the centrifugal blower X of Zhi Zaoing, the trailing edge 13b of each blade 13 of above-mentioned impeller 10 is a zigzag fashion 20, therefore, when carrying out air blast with above-mentioned impeller 10 rotations of above-mentioned motor 19 drivings, its air blast noise is littler than the blower (the trailing edge 13b that is above-mentioned blade 13 is the blower of straight line shape) of existing structure, can obtain very high quiet performance.
Promptly, make zigzag fashion 20 by trailing edge 13b with above-mentioned blade 13, at this trailing edge 13b position, blade 13 is that long part alternately exists with short part on length, therefore, flow through above-mentioned blade 13 pressure side one side air-flow and suction surface one side of flowing through air-flow the two at the interflow at trailing edge 13b position, be on the total length of this trailing edge 13b, to be interim ground slowly to carry out.Its result is accompanied by at the interflow of this trailing edge 13b position air-flow and the pressure gradient and the loss of velocity of the air-flow that produces diminish, and correspondingly, the disorder of this trailing edge 13b position air-flow is suppressed and has reduced the air blast noise.
In addition, when as this form of implementation, the relation of the external diameter " D " of the size of each tooth 21 on the above-mentioned zigzag fashion 20 and above-mentioned impeller 10 is set for: when the tooth depth of this tooth 21 for " H ", tooth pitch during for " S ", during for " 0.005＜H/D＜0.015 " and " 0.01＜S/D＜0.02 ", can more effectively reduce the air blast noise, further improve the quiet performance of centrifugal blower.
On the other hand, as shown in Figure 2, has the centrifugal blower X of said structure and the above-mentioned indoor set Z that constitutes as outfit, the peculiar effect of this centrifugal blower X, be that the quiet performance of aforesaid height will be reflected on the ride quality of this indoor set Z from cover to cover, its result can provide the indoor set Z of high quiet performance by adopting above-mentioned centrifugal blower X.
The simple in structure of above-mentioned indoor set Z is described as follows.That is, above-mentioned indoor set Z is that central position on the ventilation road 4 of shell 1 disposes above-mentioned centrifugal blower X and disposing heat exchanger 5 and constitute around this centrifugal blower X.Be numbered 2 among this figure, for the blower suction port 16 corresponding suction ports of above-mentioned centrifugal blower X, these suction port 2 places dispose horn mouth 8, and, the suction inlet grid 6 that is equipped with filter 7 is installed below this horn mouth 8.In addition, at the outer circumferential side of above-mentioned suction inlet grid 6, the downstream side of facing above-mentioned heat exchanger 5 is formed with blow-off outlet 3.
So as this indoor set Z, by the operation of above-mentioned centrifugal blower X, the indoor air that sucks from above-mentioned suction port 2 is blown side out to above-mentioned heat exchanger 5 by the blower blow-off outlet 17 of this centrifugal blower X.And this blow out air is by during the above-mentioned heat exchanger 5, and carries out the circuit refrigeration agent in these heat exchanger 5 sides and carries out heat exchange and become warm braw or cold wind and blow out to indoor from above-mentioned blow-off outlet 3, realizes intensification or cooling that this is indoor.The possibility of industrial utilization
Centrifugal blower of the present invention is except can be used as the use in refrigeration system blower is used, can also use at all spectra of transferring fluid, and, air conditioner of the present invention as being equipped with this centrifugal blower particularly can be applied in the various buildings as ceiling embedded type or ceiling hanging type indoor set.

Claims (6)

1. centrifugal blower (X) with impeller (10), this impeller (10) has: be fixed on the wheel hub (11) on the motor shaft (19a) of motor (19), dispose in opposite directions with set interval and be formed with the guard shield (12) of suction port (16) with respect to this wheel hub (11) in its axial portions, and across being the multi-disc blade (13) that the center roughly is radial configuration between the peripheral part of the peripheral part of above-mentioned wheel hub (11) and above-mentioned guard shield (12) and with the axle center of above-mentioned wheel hub (11); By the rotation of this impeller (10), produce air-flow from leading edge (13a) side direction trailing edge (13b) side flow of above-mentioned blade (13), it is characterized in that,
The trailing edge (13b) of above-mentioned blade (13) is the zigzag fashion (20) that mutual warpage extends to the width of blade direction simultaneously on the length of blade direction.
2. centrifugal blower as claimed in claim 1 is characterized in that, a plurality of teeth (21) that constitute above-mentioned zigzag fashion (20) are respectively triangle roughly.
3. centrifugal blower as claimed in claim 2 is characterized in that, the end of above-mentioned each tooth (21) is plane or circular-arc.
4. as claim 1,2 or 3 centrifugal blower, it is characterized in that, each tooth (21) that constitutes above-mentioned zigzag fashion (20) is set for: establishing its tooth depth is: " H ", tooth pitch are 0.005＜H/D＜0.015 and 0.01＜S/D＜0.02 with respect to the pass of the external diameter " D " of above-mentioned impeller (10) when " S ".
5. the manufacture method of the above-mentioned impeller (10) of the centrifugal blower with impeller (10), this impeller (10) has wheel hub (11), the guard shield (12) that disposes in opposite directions with set interval with respect to this wheel hub, and across between the peripheral part of the peripheral part of above-mentioned wheel hub (11) and above-mentioned guard shield (12), being configured, and its trailing edge (13b) is the multi-disc blade (13) of the zigzag fashion (20) that mutual warpage extends to the width of blade direction simultaneously on the length of blade direction, it is characterized in that, when making
Use is used on the thick direction of sheet of the above-mentioned wheel hub of moulding (11) being provided with in two faces the 1st forming die (31) of a face of above-mentioned blade (13),
With the 1st forming die (31) can relative deciliter ground another face that dispose in opposite directions, that be used for the above-mentioned wheel hub of moulding (11) the 2nd forming die (32),
And can be respectively at the position, gap of above-mentioned each blade (13) advance and retreat ground configuration on the length of blade direction of this blade (13), be used for moulding and be located at a plurality of the 3rd forming dies (33) of the above-mentioned zigzag fashion (20) on the trailing edge (13b) of above-mentioned blade (13) at least;
Above-mentioned the 1st forming die (31), above-mentioned the 2nd forming die (32) and above-mentioned each the 3rd forming die (33) are set in respectively on separately the set assembling position, and the injection fused raw material makes it moulding to formed die cavity between these each forming dies (31,32,33) in;
Then, above-mentioned the 1st forming die (31) and above-mentioned the 2nd forming die (32) are separated from each other and carry out form removal, simultaneously, above-mentioned each the 3rd forming die (33) is moved to the length of blade direction of above-mentioned blade carry out form removal, thereby produce the one-body molded body (15) that above-mentioned wheel hub (11) and above-mentioned each blade (13) become one;
Afterwards, the engaged at end of the above-mentioned blade (13) on above-mentioned one-body molded body (15) is fixed the guard shield (12) with this one-body molded body (15) difference moulding, thereby obtains above-mentioned impeller (10).
6. an air conditioner (Z) is characterized in that, disposes claim 1,2,3 or 4 described centrifugal blowers (X) and heat exchanger (5) in shell (1) in the formed ventilation road (4).
CNB988014270A 1997-09-30 1998-09-28 Centrifugal blower, method of mfg. same, and air-conditioner provided with same Expired - Lifetime CN1133819C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP09265401A JP3092554B2 (en) 1997-09-30 1997-09-30 Centrifugal blower, method for manufacturing the same, and air conditioner equipped with the centrifugal blower
JP265401/97 1997-09-30
JP265401/1997 1997-09-30

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CN1241248A true CN1241248A (en) 2000-01-12
CN1133819C CN1133819C (en) 2004-01-07

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EP (1) EP0942175B1 (en)
JP (1) JP3092554B2 (en)
CN (1) CN1133819C (en)
AU (1) AU712784B2 (en)
DE (1) DE69827764T2 (en)
ES (1) ES2234153T3 (en)
HK (1) HK1021556A1 (en)
WO (1) WO1999017027A1 (en)

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JPH11101198A (en) 1999-04-13
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DE69827764T2 (en) 2005-12-29
HK1021556A1 (en) 2000-06-16
WO1999017027A1 (en) 1999-04-08
EP0942175A4 (en) 2002-05-08
EP0942175A1 (en) 1999-09-15
CN1133819C (en) 2004-01-07
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EP0942175B1 (en) 2004-11-24
AU9186298A (en) 1999-04-23
ES2234153T3 (en) 2005-06-16

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