AU716795B2 - Cross flow fan for air conditioner - Google Patents
Cross flow fan for air conditioner Download PDFInfo
- Publication number
- AU716795B2 AU716795B2 AU75343/96A AU7534396A AU716795B2 AU 716795 B2 AU716795 B2 AU 716795B2 AU 75343/96 A AU75343/96 A AU 75343/96A AU 7534396 A AU7534396 A AU 7534396A AU 716795 B2 AU716795 B2 AU 716795B2
- Authority
- AU
- Australia
- Prior art keywords
- cross flow
- flow fan
- hub assembly
- shaft
- blade assemblies
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
M~UMi 1 28/S(91 Regulation 3.2(2)
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT Application Number: Lodged: 9* a
S
S
S
S
Invention Title: CROSS FLOW FAN FOR AIR CONDITONER The following statement is a full description of this invention, including the best method of performing it known to us CROSS FLOW FAN FOR AIR CONDITIONER BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross flow fan for an air filter, and more particularly to a cross flow fan for an air filter which makes it possible to cast a blade assembly and a hub assembly in a same mold.
2. Description of the Prior Art As shown in Figure 1, in an inner chamber of a conventional air conditioner there is provided a cross flow fan 1 for generating a dynamic pressure resulting from a vortex flow while making a clockwise rotation.
By a side of an exhaust vent 5 there is provided a rear guide 2 for converting the dynamic pressure generated by the cross flow fan 1 to a static pressure, and by another side of e the exhaust vent 5 there is provided a stabilizer 3 for S 20 partitioning a suction region and an exhaust region in the inner chamber.
e Adjacent to the cross flow fan 1 there is furnished a heat exchanger 4 for cooling or heating air in accordance with the static and dynamic pressure.
25 The air conditioner having such a structure is heat- 1 oeo i ooooo exchanged when the air passes through the heat exchanger 4 in accordance with rotation of the cross flow fan i, and the heat-exchanged air is flowed through the exhaust vent 5 formed within the stabilizer 3 and exhausted outside the inner chamber of the air conditioner.
Here, the cross flow fan 1 for generating a static pressure is formed of a plastic resin and fabricated by means of an injection molding and an ultrasonic welding.
As shown in Figure 2A, a plurality of blade assemblies are linearly stacked with a doughnut-shaped disc inserted between each of the blade assemblies 10, and a shaft cap 30 is connected using an ultrasonic welding to a side of the set of the blade assembly 10. A shaft 31 extended from a surface portion of the shaft cap 30 is inserted into a bearing (not shown). A hub assembly 20 is connected using an ultrasonic welding to another side of the set of the blade assemblies and a side of the hub assembly 20 is connected to a motor shaft (not shown).
The construction of the blade assemblies 10, the hub assembly 20, the shaft cap 30 will be described.
As shown in Figure 2B, in an inner surface of a first :eeeee disc 11 having a hole 14 therethrough there are fixed a plurality to waved blades 12. In and along an outer surface of the first disc 11 there are radially formed a plurality of waved cuts 13 for receiving respective blades 12. In general, .2 2 ee*ee: nine or ten set of blade assemblies 10 are employed to constitute the cross flow fan 1.
Referring to Figure 2C showing the hub assembly 20 formed by means of an injection molding by using a different mold, a plurality of waved blades 22 are respectively fixed in a corresponding one of the waved cuts 13 formed in the first disc 11 using an ultrasonic welding.
A hub 25 receiving a hub shaft 24 is insertingly formed in the second disc 21 using an injection molding so that a motor shaft (not shown) can be inserted into an opening 28 formed in the top center of the hub shaft 24, wherein the hub shaft 24 is extended to the level of the central portion of the plurality of the second blades 22, and a hole 24b for receiving a connection member is formed in a portion of an extended portion 24a of the hub shaft 24. Here, one of the plurality of blades 22 is removed thus to facilitate a tool insertion therethrough when screwing a bolt into the hole 24b.
As shown in Figure 2D, in and along an inner surface of the shaft cap 30 there are radially formed a plurality of 20 waved cuts 32 for receiving respective blades 12, and in the outer surface of the a shaft 31 being inserted into a bearing oeoe there are formed waved cuts 32.
The fabrication procedures of the thusly composed cross flow fan 1 is as follows.
25 To fabricate the cross flow fan i, the blade assembly e•3 the hub assembly 20 and the shaft cap 30 are initially molded.
Each of the molded casts are assembled an connected by using an ultrasonic welding after carrying out an injection molding for the blade assemblies 10, the hub assembly 20 and the shaft cap Meanwhile, an insert injection molding method is applied to fabricate the hub assembly 20, wherein a melting plastic is poured into a mold which has formed the second disc 21 of the hub assembly 20 and an iron hub is inserted into the melting plastic held in the mold.
However, to fabricate the conventional cross flow fan for an air conditioner, there has been required separate molds for the blade assembly, the hub assembly, and the shaft cap, thereby increasing a production cost.
Further, a mold fabrication for the hub assembly which is basically similar to the blade assembly has been a disadvantage.
Still further, the insert injection molding for directly inserting the hub needed for forming the hub assembly has S 20 taken a considerable fabrication time, and a high mold fraction and a poor workability has decreased product quality.
oooo Additionally, the removal of a blade from the blade assembly for screwing the hub shaft and the motor shaft has led to a decreased wind amount during the operation of the 25 cross flow fan.
4 aee SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a cross flow fan for an air conditioner which makes it possible to cast a blade assembly and a hub assembly in a same mold.
To achieve the above-described object, the cross flow fan for an air conditioner according to the present invention includes a plurality of blade assemblies linearly connected to each other, a hub assembly connected to an end of the o plurality of blade assemblies and formed identical to one of the blade assemblies thus to be cast in a same mold, and a shaft cap connected to another end of the plurality of blade assemblies and receiving a shaft therein.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of an inner chamber of a conventional air conditioner; Figure 2A is a perspective view of a cross flow fan of the conventional air conditioner; Figure 2B is a perspective view of a blade assembly provided in a cross flow -fan of the conventional air conditioner; Figure 2C is a perspective view of a hub assembly provided in a cross flow fan of the conventional air conditioner; Figure 2D is a perspective view of a shaft cap provided in a cross flow fan of the conventional air conditioner; Figure 3A is a perspective view showing a cross flow fan of an air conditioner according to the present invention; Figure 3B is a perspective view showing a blade assembly of a cross flow fan of an air conditioner according to the present invention; and Figure 3C is a perspective assembly view showing a hub assembly and a hub which are provided in a cross flow fan of an air conditioner according to the present invention.
a a DETAILED DESCRIPTION OF THE PRESENT
INVENTION
As shown in Fig. 3A showing a cross flow fan for an air conditioner according to the present invention, a plurality of blade assemblies 110 are linearly stacked to each other, and to an end thereof there is connected a hub assembly 120 which 20 is identical to the blade assembly 110.
An inner surface of a shaft cap 130 having a shaft 131 inserted therein by a bearing is connected using an ultrasonic welding to a plurality of blades 112 (Fig. 3B).
The construction of the blade assembly 110, the hub assembly 120, the shaft cap 130 will be further described.
,0 k
OF)
As shown in Figs. 3B and 3C, through the center of doughnut shaped discs 111, 121 which are provided between the plurality of blade assemblies 110 and the hub assembly 120 there are formed respective holes 114, 128, and a plurality of protrusions 117, 127 are circularly provided on the outer surface of each of the discs 111,121.
A plurality of waved cuts 113, 126 for receiving respective blades 112, 122 are radially and circularly formed in the inner surface of the discs 111, 121, and the plurality of blades 112, 122 are fixed in a corresponding one of a plurality of cuts formed in the inner surface of the discs 111,121.
The protrusions 117, 127 for receiving the hub 125 of the hub assembly 120 serve to prevent a flow noise during rotation of the blade assemblies 110, and an air amount from decreasing.
On a center portion of the hub 125 there is formed a hub shaft 124 and a plurality of vents 127a for receiving the respective protrusions 127 formed on the 15 disc 121.
S•In the center of the end surface of the hub shaft 124 there is formed an opening 124b for receiving a motor shaft, and a connecting hole 124a is formed in a portion of the outer periphery of the hub shaft 124 thus to communicate with 20the opening 124b.
Meanwhile, the blade assembly 110 and the hub assembly 120 are formed of a plastic resin, the hub 125 is formed of iron, and the peripheral surface of the hub shaft 124 is formed of a material such as a rubber to thereby prevent vibration.
The fabrication process of the thusly constituted cross flow fan for an air conditioner according to the present invention will be followed.
The plurality of the blade assemblies 110 and the hub assembly 120 are formed identical to each other, thus to be in common applied to the same mold, and each of the connecting portions are assembled with each other using an ultrasonic welding. The protrusions 127 of the hub assembly 120 are inserted into the respective holes 127a, and the shaft cap 130 is assembled into a corresponding one of the blade assemblies 110.
In another embodiment of the present invention, the protrusions 127 are inserted into the holes 127a, and a nut instead of welding is employed thus to connect the hub 125 to the second disc 121.
i As described above, the cross flow fan for an air conditioner according to the present invention makes it possible to cast the blade assembly and the hub assembly in e the same mold, thereby decreasing a molding cost and fabrication time.
Further, the cross flow fan for an air conditioner according to the present invention improves productivity by a 8 ea 8 a aoo.o.
simplified fabrication process without employing an insert injection molding when fabricating the hub assembly.
Still further, the number of blades formed in the hub assembly is not less than that of blades formed in the blade assembly so that an air amount is not decreased during the operation of the cross flow fan.
*9 00000 *000
Claims (10)
1. A cross flow fan for an air conditioner, including: a plurality of blade assemblies linearly connected to each other; a hub assembly connected to an end of the plurality of blade assemblies and formed identical to one of the blade assemblies thus to be cast in a same mold; and a shaft cap connected to another end of the plurality of blade assemblies and receiving a shaft therein.
2. The cross flow fan of Claim 1, wherein an ultrasonic welding is applied to connection between the blade assemblies and the hub assembly and between the blade assemblies and the shaft cap.
3. The cross flow fan of Claim 1, wherein the blade assemblies and the hub assembly respectively include: a disc including a plurality of protrusions formed circularly on a surface thereof, and having a plurality of wave cuts formed radially and circularly on the surface thereof formed about the circularly formed protrusions; and S* a plurality of blades formed on another surface of the disc.
4. The cross flow fan of Claim 3, wherein the plurality of blades are formed °in the other surface of the disc thus to correspond to the plurality of blade cuts in location.
The cross flow-fan of Claim 3, wherein the disc of the hub assembly S°includes a hub shaft formed thereon and a plurality of holes formed therethrough thus to receive the plurality of respective protrusions formed on the disc of the hub assembly. 11
6. The cross flow fan of Claim 5, wherein the hub shaft has an opening formed in an end surface thereof for receiving a motor shaft, and a connecting hole formed in a portion of an outer periphery thereof thus to communicate with the opening.
7. The cross flow fan of Claim 5, wherein the plurality of protrusions are respectively inserted into a corresponding one of the holes and applied to an ultrasonic welding.
8. The cross flow fan of Claim 5, wherein the plurality of protrusions inserted in the holes are fastened by a connection means such as a nut.
9. The cross flow fan of Claim 5, wherein the number of the blades formed in the hub assembly is identical to that of the blades formed in the blade assembly. S*
10. A fan as claimed in Claim 1 substantially as herein described with Sreference to the accompanying drawings. C DATED this 27th day of September 1999 LG ELECTRONICS INC S" WATERMARK PATENT TRADEMARK ATTORNEYS 290 BURWOOD ROAD HAWTHORN VICTORIA 3122 AUSTRALIA RCS:SMM:VRH DOC 29 AU7534396.WPC
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950048726A KR0152797B1 (en) | 1995-12-12 | 1995-12-12 | Cross flow fan strucuture of airconditioner |
| KR48726/95 | 1995-12-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU7534396A AU7534396A (en) | 1997-06-19 |
| AU716795B2 true AU716795B2 (en) | 2000-03-09 |
Family
ID=19439267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU75343/96A Ceased AU716795B2 (en) | 1995-12-12 | 1996-12-11 | Cross flow fan for air conditioner |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR0152797B1 (en) |
| CN (1) | CN1152081A (en) |
| AU (1) | AU716795B2 (en) |
| IN (1) | IN191566B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1921321A1 (en) * | 2005-08-05 | 2008-05-14 | Daikin Industries, Ltd. | Cross-flow fan made of resin and method of manufacturing the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100468444B1 (en) * | 2002-03-29 | 2005-01-27 | 휴먼전자 주식회사 | Forming method fan for air conditioning |
| JPWO2013018359A1 (en) * | 2011-08-01 | 2015-03-05 | パナソニック株式会社 | Cross-flow fan |
-
1995
- 1995-12-12 KR KR1019950048726A patent/KR0152797B1/en not_active IP Right Cessation
-
1996
- 1996-12-09 IN IN2121CA1996 patent/IN191566B/en unknown
- 1996-12-11 AU AU75343/96A patent/AU716795B2/en not_active Ceased
- 1996-12-12 CN CN96114358A patent/CN1152081A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1921321A1 (en) * | 2005-08-05 | 2008-05-14 | Daikin Industries, Ltd. | Cross-flow fan made of resin and method of manufacturing the same |
| EP1921321A4 (en) * | 2005-08-05 | 2011-07-20 | Daikin Ind Ltd | Cross-flow fan made of resin and method of manufacturing the same |
| US8092181B2 (en) | 2005-08-05 | 2012-01-10 | Daikin Industries, Ltd. | Resin cross flow fan and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR970045641A (en) | 1997-07-26 |
| AU7534396A (en) | 1997-06-19 |
| KR0152797B1 (en) | 1998-11-02 |
| CN1152081A (en) | 1997-06-18 |
| IN191566B (en) | 2003-12-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) |