CN2455951Y - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
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- CN2455951Y CN2455951Y CN 00242772 CN00242772U CN2455951Y CN 2455951 Y CN2455951 Y CN 2455951Y CN 00242772 CN00242772 CN 00242772 CN 00242772 U CN00242772 U CN 00242772U CN 2455951 Y CN2455951 Y CN 2455951Y
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- hubcap
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Abstract
The utility model relates to a centrifugal fan. A plurality of vanes are arranged of equal interval between a hub and the periphery of a protecting cover in an outer circumferential direction, wherein, the hub and the protecting cover are arranged oppositely. The centrifugal fan is characterized in that the hub is formed with cooling air through holes which penetrate the hub at the part corresponding to a concave part, and the concave part is provided with a hub cover at the part near an air circulation path side; the hub cover covers the cooling air through holes from the air circulation path side under the states of ensuring that a certain gap is kept between the hub cover and the concave part, and meantime, the outer circumferential part of the hub cover is provided with an opening to the air circulation path, wherein, the outer diameter of the opening is 150 mm to 200 mm. Vanes are additionally arranged inside the gap to follow the rotation of the hub to generate air flow which flows from the cooling air through holes to the outer circumferential side. The utility model has the advantages of small size, favorable cooling effect, and simple structure.
Description
The utility model relates to centrifugal blower.
The general impeller of centrifugal blower, this impeller keep certain intervals by the wheel hub that connects motor shaft with this wheel hub and are arranged on the guard shield on its opposite, and cross over the two peripheral part and form at most blade that circumferencial direction equally spaced is provided with.At this moment, because must originally generally be axial portions forming the suction port that forms from the axial portions air ventilation path till the blow-off outlet that forms at above-mentioned wheel hub peripheral part between above-mentioned wheel hub and the guard shield at above-mentioned guard shield towards the above-mentioned wheel hub of the recessed formation of above-mentioned guard shield one side.And utilize the modal feature of this wheel hub, in the recess of wheel hub, motor is arranged to the state of submerging, realized that thus centrifugal blower is in axial miniaturization.
, when like this motor being arranged to submerge state in the recess of wheel hub, though realized the centrifugal blower miniaturization, near the circulation of the air this motor is interrupted, causes the cooling performance of this motor to reduce, and can cause that this motor is overheated, reliability is impaired.In the aircondition of centrifugal blower being located in the little spatial enclosure, the reduction of this motor cooling performance is remarkable especially.
In light of this situation, proposed many technological schemes originally,, prevented as far as possible that this motor was overheated in centrifugal blower, to make cooling air in the circulation energetically of motor part.Method as one of them is that it is disclosed that for example the spy opens flat 6-341659 communique.
This known example is the cooling air through hole that is communicated with inside and outside the position corresponding with above-mentioned wheel hub recess forms a plurality of and wheel hub, at the above-mentioned cooling air through hole formation position of above-mentioned wheel hub hubcap is set simultaneously, separate certain intervals with inboard (being above-mentioned air ventilation path side) and cover this cooling air throughhole portions, form near the of said motor and arrive the cooling airflow in above-mentioned air ventilation path through passage through the clearance portion between above-mentioned cooling air through hole and above-mentioned wheel hub and hubcap respectively with above-mentioned wheel hub.This example is the part of the blow out air that will follow the running of above-mentioned centrifugal blower and blow out from above-mentioned blade, the centrifugal blower inhalation power that utilization acts on above-mentioned cooling air throughhole portions (in other words, be the front and back pressure difference of above-mentioned cooling air through hole), and through above-mentioned cooling airflow through passage import energetically said motor near.
, in this motor cooling construction, when the hubcap commercialization, be difficult to constitute ideal dimensions.And above-mentioned cooling construction only utilizes the centrifugal blower attraction force that acts on the cooling air throughhole portions that forms on the above-mentioned wheel hub to make the cooling air circulation, and cooling air importing effect naturally can be restricted.If but therefore improve cooling air importing effect, and then must increase the opening area of the above-mentioned cooling air through hole that forms at above-mentioned wheel hub, and enlarge hubcap, but can make hubcap excessive like this, be unfavorable to product.
The utility model purpose provides has the centrifugal blower that size is suitable for the hubcap of commercialization, and the aircondition that possesses this centrifugal blower.
The utility model is a kind of centrifugal blower, have by wheel hub 11, the impeller 10 that guard shield 12 and a plurality of blade 13 are formed, wheel hub 11 has at axis central part to the recessed recess 11e of a side of thickness of slab direction, link to each other simultaneously with the motor drive shaft 14b of the motor 14 that is provided with among this recess 11e, guard shield 12 and this wheel hub 11 separate that certain intervals is oppositely arranged and and this wheel hub 11 between form air ventilation path 23, simultaneously be provided with blower fan suction port 19 at its axis central part, a plurality of blades 13 along the circumferential direction uniformly-spaced are arranged between the peripheral part and above-mentioned guard shield 12 peripheral parts of opposed facing above-mentioned wheel hub 11, be characterized in, on the position corresponding of above-mentioned wheel hub 11 with above-mentioned recess 11e, be formed on the cooling air through hole 16 that the thickness of slab direction connects this wheel hub 11, at the position of the above-mentioned recess 11e of above-mentioned wheel hub 11 hubcap 15 is housed in addition by above-mentioned air ventilation path 23 1 sides, this hubcap 15 guarantee and above-mentioned recess 11e between have under the state of certain interval portion 18 and cover above-mentioned cooling air through hole 16 from above-mentioned air ventilation path 23 1 sides, its peripheral part is to above-mentioned air flow path footpath 23 openings simultaneously, and the external diameter of above-mentioned hubcap 15 forms in the scope of 150mm to 200mm.In this structure, it is 178mm that hubcap 15 can form external diameter.
In addition, in above-mentioned structure, hubcap 15 possesses the inclined plane part 15a that plat part 15b and the outer periphery with this plat part 15b are connected, are inclined to simultaneously conical surface shape, and the facial 15a that tilts can form the shape of axial length 50mm～60mm, internal diameter 80mm～130mm, external diameter 150mm～200mm.In this structure, the facial 15a of the inclination of hubcap 15 can form the shape of axial length 55mm, internal diameter 105mm, external diameter 178mm.
Adopt above-mentioned structure, be created in case follow the running of centrifugal blower X in the air ventilation path 23 and flow A1 to blower fan blow-off outlet 20 flow air from blower fan suction port 19, then owing to air ventilation path 23 openings of the above-mentioned cooling air through hole 16 that on above-mentioned wheel hub 11, forms towards the upstream side (being the suction side) of above-mentioned blade 13, after the inhalation power that acts on these cooling air through hole 16 parts just makes near recess 11e part from above-mentioned wheel hub 11 (be said motor 14) be imported into above-mentioned clearance portion 18 by above-mentioned cooling air through hole 16, the air stream A2 that should flow to air ventilation path 23 1 sides again from the peripheral part of this clearance portion 18 produces, can be energetically with said motor 14 coolings by this air stream A2.And hubcap can form the size configurations that is suitable for commercialization.
In above-mentioned structure, be preferably in the clearance portion 18 between wheel hub 11 and the hubcap 15 to be provided with and follow the rotation of above-mentioned wheel hub 11 and be created in the blade 17 that flows to the air stream A2 of its outer circumferential side in the above-mentioned clearance portion 18 from above-mentioned cooling air through hole 16.At this moment, above-mentioned blade 17 preferably the length of roller hub one side than short by hubcap one side.Specifically, can be by hubcap one side be 60mm, roller hub one side is 47mm, highly is 5mm～10mm.
At this moment, between above-mentioned wheel hub 11 and above-mentioned hubcap 15, form above-mentioned blade 17, the air-supply effect of following the rotation of above-mentioned impeller 10 just to produce above-mentioned blade 17.The air-supply of this blade 17 has encouraged flowing of above-mentioned air stream A2 that the inhalation power of centrifugal blower X causes, the flow of this air stream A2 is increased, and the air of volume like this is offered said motor 14 parts as cooling air.Thus, can prevent the overheated of said motor 14 more reliably, improve the reliability of this motor 14 more, and then improve the reliability of centrifugal blower X.And avoided increasing the problem that causes wheel hub reduction in strength and centrifugal blower reliability decrease because of the opening area of cooling air through hole.
Do not increase when this blade 17 being set owing to the flow-rate ratio of the above-mentioned air stream A2 of the air-supply effect cooling air utilization that produce, that be used as motor 14 of above-mentioned blade 17, therefore for example when the necessary flow of above-mentioned air stream A2 is identical, as long as increase flow by above-mentioned blade 17, just can dwindle the opening area of above-mentioned cooling air through hole 16, because the minimizing of this opening area just can correspondingly make the strength character of above-mentioned wheel hub 11 improve.
Promptly, adopt centrifugal blower of the present utility model, by adopting clearance portion 18 that above-mentioned blade 17 this extremely simple and easy and cheap construction are set, just can not only guarantee the strength character of above-mentioned wheel hub 11 but also guarantee the reliability of said motor 14 15 of above-mentioned wheel hub 11 and hubcaps.
In above-mentioned structure, preferably above-mentioned blade 17 is formed one with above-mentioned wheel hub 11 or hubcap 15.
Adopt this structure, with for example this blade 17 is compared with the structure that above-mentioned wheel hub 11 or hubcap 15 splits form, part number reduces, the corresponding thus operation that has reduced when part is made, simultaneously when centrifugal blower X assembles, can reduce its number of working processes, more cheap centrifugal blower X finally can be provided.
The utility model also is provided on the ventilation road 4 in the shell 1 the centrifugal blower X of above-mentioned structure and the aircondition of heat exchanger 6 is set.
Adopt such structure, though centrifugal blower X is arranged in the shell 1, the ventilated of said motor 14 is interrupted, but because the air-supply effect of the blade 17 that is provided with in the clearance portion 18 of 15 of the above-mentioned wheel hub 11 of above-mentioned centrifugal blower X and hubcaps, can supply with said motor 14 more cooling airs, prevent the overheated of motor as much as possible, therefore can provide reliability higher air conditioner.
Simple declaration to accompanying drawing
Fig. 1 is the sectional view of centrifugal blower of the present utility model.
Fig. 2 is that II-II major component of Fig. 1 is to view.
Fig. 3 represents the size of hubcap.
Fig. 4 represents the size of hubcap blade.
Fig. 5 is the sectional view of air conditioner of the present utility model.
The air conditioner that specifies centrifugal blower of the present utility model and this centrifugal blower is housed below in conjunction with preferable example shown in the drawings.
Fig. 1 and Fig. 2 represent the centrifugal blower X of the utility model example.This centrifugal blower X has impeller 10, this impeller 10 by and the wheel hub 11 that is coupling of the motor drive shaft 14b of motor 14, and this wheel hub 11 separates that certain intervals is oppositely arranged and form the guard shield 12 of blower fan suction port 19 at its axis central part, across the peripheral part of the peripheral part of above-mentioned wheel hub 11 and above-mentioned guard shield 12 between and form at a plurality of blades 13 that circumferencial direction uniformly-spaced is provided with.Above-mentioned impeller 10 be the peripheral part of above-mentioned wheel hub 11 and above-mentioned guard shield 12 as blower fan blow-off outlet 20, simultaneously path from above-mentioned blower fan suction port 19 to above-mentioned blower fan blow-off outlet 20 as air ventilation path 23.
Above-mentioned wheel hub 11 be near the axle center of the plectane body of certain diameter to the moulding of thickness of slab direction depression, by be positioned at its peripheral part and along the outside planar surface portion 11a that extends with the direction of the axle center quadrature of wheel hub 11, the axial portions that is positioned at this wheel hub 11 and along extend with the direction of its axle center quadrature and this shaft core position forms certain diameter mounting hole 11d the 11c of inner side plane portion, reach conical surface-shaped that the outer circumferential side with all sides of above-mentioned outside planar surface portion 11a and the above-mentioned inner side plane 11c of portion the links to each other facial 11b that tilts and form.So above-mentioned wheel hub 11 becomes in the facial 11b of above-mentioned inclination and the 11c of inner side plane portion part to the recessed form of above-mentioned air flow path footpath 23 1 sides.This recessed portion is the state of submerging said motor 14 is set as recess 11e in recess 11e.
On the facial 11b of the above-mentioned inclination of above-mentioned wheel hub 11, form a plurality of (this example is 5) slotted hole shape cooling air through hole 16 in the position of the above-mentioned inner side plane 11c of portion of deflection with above-mentioned recess 11e and 23 connections of above-mentioned air ventilation path.And on the above-mentioned inner side plane 11c of portion of above-mentioned wheel hub 11,, hubcap 15 described below is installed in order to cover cooling air through hole 16 from above-mentioned air ventilation path 23 1 sides.
Above-mentioned hubcap 15 is the integrally formed product of resin, play along Lower Half from the facial 11b of above-mentioned inclination of above-mentioned wheel hub 11 the above-mentioned inner side plane 11c of portion part shape and be plate-like, have be positioned at its outer circumferential side and the inclination facial 15a corresponding with the facial 11b of the inclination of above-mentioned wheel hub 11, through flexure plane and with the underpart of this facial 15a that tilts continuously and with the corresponding planar surface portion 15b of the 11c of inner side plane portion of above-mentioned wheel hub 11, and and the continuous hub portion 15c of all sides of this planar surface portion 15b.On above-mentioned hub portion 15c, metal insertion part 15d is installed, the motor drive shaft 14b of said motor 14 is connected with above-mentioned hubcap 15 and above-mentioned wheel hub 11 by insertion part 15b.
Inner face (being the inner face of concave side) at the facial 15a of above-mentioned inclination of above-mentioned hubcap 15 along the circumferential direction equally spaced forms one with hubcap 15 to the 5 laminated rib shape blades 17 that radially extend.The height dimension of blade 17 and in the following setting in the formation position of circumferencial direction: with the 11c of inner side plane portion of 15 pairs of above-mentioned wheel hubs 11 of this hubcap from it under inboard involutory state, the upper side of this blade 17 is close to or near the surface of the facial 11b of the inclination of above-mentioned wheel hub 11, and each blade 17 is corresponding with the neutral position of above-mentioned each cooling air through hole 16 on the above-mentioned wheel hub 11 separately simultaneously.Above-mentioned hubcap 15 is by being based in locating stud 22 on it and embedding above-mentioned wheel hubs 11 and in circumferencial direction and radial location, and is fixed on the above-mentioned wheel hub 11 by each set screw 21.
Above-mentioned hubcap 15 as shown in Figure 3, the outside dimension of the facial 15a that tilts (internal diameter size of peripheral part) φ D1 is 178mm approximately, height dimension H is 55mm approximately.And the internal diameter size φ D2 of the facial 15a that tilts is 130mm approximately, and the outside dimension φ D3 of planar surface portion 15b is 84mm approximately.And, tilting when not establishing curved part between facial 15a and the planar surface portion 15b, the internal diameter size φ D2 of the facial 15a that tilts and the boundary dimension φ D3 of planar surface portion 15b can be 105mm.On the other hand, above-mentioned blade 17 depends on the about 60mm of length dimension L1 of hubcap 15 1 sides as shown in Figure 4, the about 47mm of length dimension L2 of roller hub 11, and height dimension H1 is 9mm, H2 is 5mm.And, between wheel hub 11 and blade 17, form the roughly clearance C of the 1.5mm of homogeneous.These sizes are the preferred valueses that are suitable for product, allow error to a certain degree.
After being installed on above-mentioned hubcap 15 on the above-mentioned wheel hub 11, between this wheel hub 11 and hubcap 15, form and to have the size suitable or bigger gap size (this size is different because of the size of above-mentioned clearance C) and in the coniform clearance portion 18 of its peripheral part and above-mentioned air ventilation path 23 open communication with the height dimension of above-mentioned blade 17.Above-mentioned each cooling air through hole 16 is in the face of this gap portion 18 openings.So the recess 11e in the outside of above-mentioned wheel hub 11 respectively cools off through hole 16 and above-mentioned clearance portion 18 and is communicated with above-mentioned air ventilation path 23 through above-mentioned.
In the centrifugal blower X that constructs like this, when said motor 14 runnings, when above-mentioned impeller 10 rotates, the air-supply effect of above-mentioned each blade 13 makes the air that sucks in the air ventilation path 23 from above-mentioned blower fan suction port 19 blow out (seeing air stream A1) as blow out air from above-mentioned blower fan blow-off outlet 20.
Follow air-supply effect, just the inhalation power that produces by air-supply at above-mentioned each cooling air through hole 16 partial action towards above-mentioned air ventilation path 23 openings of above-mentioned blade 13 upstream sides as the original function of this centrifugal blower X.So, because the pressure difference inside and outside the above-mentioned cooling air through hole 16, make the air of above-mentioned recess 11e one side be inhaled into above-mentioned clearance portion 18 1 sides by above-mentioned cooling air through hole 16, between above-mentioned recess 11e and above-mentioned clearance portion 18 and above-mentioned air flow path 23, produce the air stream A2 that flows to above-mentioned air ventilation path 23 by above-mentioned cooling air through hole 16 from above-mentioned recess 11e.This air stream A2 partly cools off the motor body 14a that is arranged on the said motor 14 in the above-mentioned recess 11e, just can prevent that it is overheated.
Have again, in this example, above-mentioned each blade 17 also is set in above-mentioned clearance portion 18, follow the rotation of above-mentioned impeller 10, each blade 17 is also brought into play the air-supply effect, the air-supply effect of each blade 17 more encouraged because of above-mentioned cooling air through hole 16 inside and outside pressure differences produce the flowing of the formed above-mentioned air stream A2 of inhalation power, the flow of this air stream A2 is increased.The flow of this air stream A2 increases, and the air quantity that has caused being imported into the motor body 14a part of said motor 14 as cooling air increases.Its result, the cooling performance of said motor 14 has been compared raising significantly with the original structure that above-mentioned blade 17 is not set, prevent the overheated of said motor 14 more reliably, improved the operational reliability of said motor 14, and then improve the reliability of above-mentioned centrifugal blower X.
On the other hand, as mentioned above, by being set, above-mentioned blade 17 make the cooling air air quantity increase of supplying with said motor 14 can obtain higher cooling performance, so for example cooling off the required cooling air quantities of said motor 14 with original (occasion of above-mentioned blade 17 is not set) when identical, only increase air quantity by above-mentioned blade 17, the opening area of above-mentioned cooling air through hole 16 is dwindled, and the minimizing of the opening area of this cooling air through hole 16 is related to the strength character raising of above-mentioned wheel hub 11 again.
So, the centrifugal blower X of this example is provided with the so extremely simple and cheap construction of above-mentioned blade 17 by adopting in above-mentioned clearance portion 18, the cooling performance that can improve said motor 14 is to improve its reliability, and the strength character that can improve above-mentioned wheel hub 11 again is to improve the reliability on its intensity.
But, this example is that above-mentioned blade 17 and above-mentioned hubcap 15 are formed one, and also above-mentioned blade 17 and above-mentioned wheel hub 11 can be formed one in other examples of the application.Be that above-mentioned blade 17 is made straight rib shape in addition in this example, but in other examples, also this blade 17 can be made and same crooked tabular of above-mentioned blade 13.
In this example, be that blade 17 is set in hubcap 15, but blade 17 may not be set.Even do not establish blade 17,, can take into account the strength character of wheel hub 11 and the cooling performance of motor equally as long as hubcap 15 is made ideal dimensions when the commercialization.
Fig. 5 represents to be equipped with the indoor set Z of type-dividing conditioner of the centrifugal blower X of above-mentioned structure.This indoor set Z is embedded in embedding ceiling-type indoor set the ceiling board 24 from an indoor side, and the central part of the ventilation flue 4 in shell 1 is provided with above-mentioned centrifugal blower X, and heat exchanger 6 is set around this centrifugal blower X simultaneously.Symbol 2 among this figure is suction ports corresponding with the blower fan suction port 19 of above-mentioned centrifugal blower X, at these suction port 2 places horn mouth 9 is set, and at the downside of this horn mouth 9 the suction grid 7 that possesses filter 8 is installed simultaneously.At the outer circumferential side of above-mentioned suction grid 7, form blow-off outlet 3 in the face of downstream one side of above-mentioned heat exchanger 6.
In above-mentioned indoor set Z, by the running of above-mentioned centrifugal blower X, the indoor air that will suck from above-mentioned suction port 2 blows out from blower fan blow-off outlet 20 heat exchanger 6 of this centrifugal blower X.And this blow out air blows out to indoor from above-mentioned blow-off outlet 3 as warm braw or cold wind during by above-mentioned heat exchanger 6 and after the refrigeration agent that is circulated in this heat exchanger 6 carries out heat exchange, indoorly makes warm or refrigeration (reference air stream A1) to this.
On the other hand, the part of the blow out air that blows out from the blower fan blow-off outlet 20 of above-mentioned centrifugal blower X, gap between the upper side (being the upper side of above-mentioned wheel hub 11) of the impeller 10 by above-mentioned centrifugal blower X and the top board 1a of above-mentioned shell 1, importing is held in the recess 11e of above-mentioned wheel hub 11 of said motor 14, simultaneously, be imported into the gas among this recess 11e, because the inhalation power of above-mentioned air ventilation path 23 1 sides that produce along with the rotation of above-mentioned impeller 10, add the air-supply effect of the above-mentioned blade 17 in the clearance portion 18 that is located between above-mentioned wheel hub 11 and the hubcap 15, and flow in the above-mentioned clearance portion 18, and blow out (reference air stream A2) to the top in above-mentioned air flow path footpath 23 from this clearance portion 18 by the cooling air through hole 16 of above-mentioned wheel hub 11.Because the effect of this air stream A2, although said motor 14 is set at the bad position of ventilated, cooling motor body 14a positively prevents the overheated of said motor 14 effectively, and then guarantees the high reliability of above-mentioned indoor set Z.That is, resemble the structure that indoor set Z is arranged on said motor 14 ventilated bad position in the shell 1 like this,, can realize significant especially effect owing to used the above-mentioned centrifugal blower X of the cooling performance that can improve this motor 14.
Claims (8)
1. a centrifugal blower has the impeller of being made up of wheel hub (11), guard shield (12) and a plurality of blade (13) (10),
Wheel hub (11) has at axis central part to the recessed recess (11e) of a side of thickness of slab direction, links to each other with the motor drive shaft (14b) of the motor (14) that is provided with in this recess (11e) simultaneously,
Guard shield (12) and this wheel hub (11) separate that certain intervals is oppositely arranged and and this wheel hub (11) between form air ventilation path (23), be provided with blower fan suction port (19) at its axis central part simultaneously,
A plurality of blades (13) along the circumferential direction uniformly-spaced are arranged between the peripheral part of the peripheral part of opposed facing above-mentioned wheel hub (11) and above-mentioned guard shield (12),
It is characterized in that, on the position corresponding of above-mentioned wheel hub (11), be formed on the cooling air through hole (16) that the thickness of slab direction connects this wheel hub (11) with above-mentioned recess (11e),
On the other hand, hubcap (15) is equipped with at the position by above-mentioned air ventilation path (23) one sides at the above-mentioned recess (11e) of above-mentioned wheel hub (11), this hubcap (15) guarantee and above-mentioned recess (11e) between have under the state of certain interval portion (18) and cover above-mentioned cooling air through hole (16) from above-mentioned air ventilation path (23) one sides, its peripheral part is to above-mentioned air flow path footpath (23) opening simultaneously
The external diameter of above-mentioned hubcap (15) forms in the scope of 150mm to 200mm.
2. centrifugal blower according to claim 1 is characterized in that, the external diameter of hubcap (15) is 178mm.
3. centrifugal blower according to claim 1 is characterized in that, above-mentioned hubcap (15) possesses the inclined plane part (15a) that plat part (15b) and the outer periphery with this plat part (15b) are connected, are inclined to simultaneously conical surface shape,
The axial length of inclination facial (15a) is that 50mm～60mm, internal diameter are that 80mm～130mm, external diameter are 150mm～200mm.
4. centrifugal blower according to claim 3 is characterized in that, the axial length of the inclination face (15a) of above-mentioned hubcap (15) is that 55mm, internal diameter are that 105mm, external diameter are 178mm.
5. according to each described centrifugal blower in the claim 1 to 4, it is characterized in that setting is followed the rotation of above-mentioned wheel hub (11) and is created in the blade (17) that flows to the air stream (A2) of its outer circumferential side in the above-mentioned clearance portion (18) from above-mentioned cooling air through hole (16) in the clearance portion (18) between above-mentioned wheel hub (11) and hubcap (15).
6. centrifugal blower according to claim 5 is characterized in that, the length of roller hub one side of above-mentioned blade (17) is than the weak point by hubcap one side.
7. centrifugal blower according to claim 6 is characterized in that, the length by hubcap one side of above-mentioned blade (17) is 60mm, and roller hub one side is 47mm, highly is 5mm～10mm.
8. according to each described centrifugal blower in the claim 5 to 7, it is characterized in that above-mentioned blade 17 forms one with above-mentioned wheel hub (11) or hubcap (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00242772 CN2455951Y (en) | 2000-08-22 | 2000-08-22 | Centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00242772 CN2455951Y (en) | 2000-08-22 | 2000-08-22 | Centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2455951Y true CN2455951Y (en) | 2001-10-24 |
Family
ID=33602824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00242772 Expired - Lifetime CN2455951Y (en) | 2000-08-22 | 2000-08-22 | Centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2455951Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112292802A (en) * | 2018-05-11 | 2021-01-29 | 株式会社日立产业机器 | Rotating electrical machine |
-
2000
- 2000-08-22 CN CN 00242772 patent/CN2455951Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112292802A (en) * | 2018-05-11 | 2021-01-29 | 株式会社日立产业机器 | Rotating electrical machine |
| CN112292802B (en) * | 2018-05-11 | 2023-12-08 | 株式会社日立产业机器 | Rotary electric machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20100822 Granted publication date: 20011024 |