JPH04116699U - centrifugal fan - Google Patents
centrifugal fanInfo
- Publication number
- JPH04116699U JPH04116699U JP2608691U JP2608691U JPH04116699U JP H04116699 U JPH04116699 U JP H04116699U JP 2608691 U JP2608691 U JP 2608691U JP 2608691 U JP2608691 U JP 2608691U JP H04116699 U JPH04116699 U JP H04116699U
- Authority
- JP
- Japan
- Prior art keywords
- blade
- centrifugal fan
- thickness
- injection molding
- hollow
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000001746 injection moulding Methods 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
(57)【要約】
【目的】 プラスチックの射出成形時における冷却硬化
時間を短縮するとともにこの冷却硬化時の変形歪みを防
止し、かつ、プラスチック材料を節減する。
【構成】 羽根１を中空で翼厚の大きい翼形とし、その
肉厚を射出成形可能な厚さとする。
(57) [Summary] [Purpose] To shorten the cooling hardening time during plastic injection molding, prevent deformation distortion during cooling hardening, and save plastic materials. [Structure] The blade 1 is hollow and has an airfoil shape with a large blade thickness, and the wall thickness is such that it can be injection molded.
Description
【０００１】0001
本考案は空気調和機に好適な遠心ファンに関する。 The present invention relates to a centrifugal fan suitable for air conditioners.
【０００２】0002
従来の遠心ファンの１例が図２及び図３に示され、１は翼形の羽根、２は主板 、３は側板、４はボスで、これらはプラスチック材料を射出成形することによっ て一体成形されている。ボス４は図示しないモ−タのシャフトに固定される。 しかして、モ−タによってこの遠心ファンを矢印方向に回転駆動すると、空気 が吸込口５から軸方向に沿って吸込まれ、羽根１によって付勢され、吹出口６か ら遠心方向に吹き出される。 An example of a conventional centrifugal fan is shown in FIGS. 2 and 3, where 1 is an airfoil-shaped blade and 2 is a main plate. , 3 is the side plate, and 4 is the boss, which are made by injection molding plastic material. It is integrally molded. The boss 4 is fixed to the shaft of a motor (not shown). However, when this centrifugal fan is rotated in the direction of the arrow by a motor, air is is sucked in along the axial direction from the suction port 5, is urged by the blade 1, and is drawn from the air outlet 6. It is blown out in the centrifugal direction.
【０００３】0003
上記従来の遠心ファンにおいては、その羽根１はソリッドとされているため、 プラスチック材料を多く要し、また、射出成形に際して長い冷却硬化時間を要す るのでコストが嵩む。また、この冷却硬化に際して翼厚の大きい部分に「ヒケ」 が発生して翼形が変形し、遠心ファンの性能を低下させるという問題があった。 これに対処するため、プラスチック材料に発泡剤を混入することが試みられた が、これは成形時間が更に長くなり、コストも更に増大するという問題があった 。 In the conventional centrifugal fan mentioned above, the blades 1 are solid, so Requires a lot of plastic material and requires a long cooling and hardening time during injection molding This increases costs. Also, during this cooling and hardening process, "sink marks" appear on the thicker parts of the blade. This caused the problem of deformation of the airfoil shape and deterioration of the performance of the centrifugal fan. To deal with this, attempts have been made to mix foaming agents into plastic materials. However, this had the problem of further increasing molding time and cost. .
【０００４】0004
本考案は上記課題を解決するために提案されたものであって、その要旨とする ところは、プラスチック材料を射出成形することによって一体成形される遠心フ ァンにおいて、射出成形可能な肉厚からなる翼厚の大きい中空羽根を備えること を特徴とする遠心ファンにある。 This invention was proposed to solve the above problems, and its gist is as follows: However, centrifugal flaps are made by injection molding plastic materials. In a fan, a hollow blade with a large thickness that can be injection molded is provided. A centrifugal fan featuring
【０００５】[0005]
【作用】 本考案においては、上記構成を具えているため、羽根の肉厚を全体にほぼ均一 化できる。[Effect] Since this invention has the above configuration, the thickness of the blade is almost uniform throughout. can be converted into
【０００６】[0006]
本考案の１実施例が図１に示されている。 羽根１は中空で翼厚の大きい翼形とされている。この羽根１の肉厚は射出成形 可能な厚さ、即ち、２〜３mm以上とされ、中空部10の厚さは射出成形時の雄型の 強度面から5mm 以上とされ、従って、翼形の翼厚ｔは10mm程度に大きくされてい る。 One embodiment of the invention is shown in FIG. The blade 1 is hollow and has an airfoil shape with a large thickness. The thickness of this blade 1 is injection molded. The thickness of the hollow part 10 is determined to be as thick as possible, that is, 2 to 3 mm or more, and the thickness of the hollow part 10 is the same as that of the male mold during injection molding. From the viewpoint of strength, it is set to be 5 mm or more, and therefore the blade thickness t of the airfoil is increased to approximately 10 mm. Ru.
【０００７】[0007]
本考案においては、羽根を中空としたため、中空部の分だけプラスチック材料 を節減できる。 そして、羽根の肉厚を射出成形可能な最少の厚さで均一化しうるので、射出成 形時の冷却硬化時間を短くしうるとともにその際「ヒケ」が発生することもない ので、変形歪みのない翼形を迅速に得ることができる。 この結果、遠心ファンのコストを低減できるとともに変形歪みに起因する遠心 ファンの性能低下を防止できる。 In this invention, since the blade is hollow, plastic material is used for the hollow part. can be saved. In addition, since the wall thickness of the blade can be made uniform to the minimum thickness that can be injection molded, The cooling and hardening time during molding can be shortened, and "sink marks" do not occur during this process. Therefore, an airfoil without deformation distortion can be quickly obtained. As a result, the cost of centrifugal fans can be reduced, and centrifugal Prevents deterioration in fan performance.
【図１】本考案の１実施例を示す部分的断面図である。FIG. 1 is a partial cross-sectional view showing one embodiment of the present invention.
【図２】従来の遠心ファンの平面図である。FIG. 2 is a plan view of a conventional centrifugal fan.
【図３】従来の遠心ファンの一部を破断して示す側面図
である。FIG. 3 is a partially cutaway side view of a conventional centrifugal fan.
１ 羽根 10 中空部 ２ 主板 1 feather 10 Hollow part 2 Main plate
Claims (1)
よって一体成形される遠心ファンにおいて、射出成形可
能な肉厚からなる翼厚の大きい中空羽根を備えることを
特徴とする遠心ファン。1. A centrifugal fan integrally molded by injection molding a plastic material, characterized in that it includes hollow blades with a large blade thickness and made of a wall thickness that can be injection molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2608691U JPH04116699U (en) | 1991-03-27 | 1991-03-27 | centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2608691U JPH04116699U (en) | 1991-03-27 | 1991-03-27 | centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04116699U true JPH04116699U (en) | 1992-10-19 |
Family
ID=31910640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2608691U Pending JPH04116699U (en) | 1991-03-27 | 1991-03-27 | centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04116699U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007040236A1 (en) | 2005-10-06 | 2007-04-12 | Mitsubishi Electric Corporation | Turbo fan and air conditioner |
| EP1878923A2 (en) | 2003-11-27 | 2008-01-16 | Daikin Industries, Ltd. | Impeller of centrifugal fan and centrifugal fan disposed with the impeller |
| US9234524B2 (en) | 2011-12-13 | 2016-01-12 | Minebea Co., Ltd. | Boundary layer controlled logarithmic spiral blade |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6146493A (en) * | 1985-07-24 | 1986-03-06 | Hitachi Ltd | Manufacture of impeller for synthetic resin pump |
-
1991
- 1991-03-27 JP JP2608691U patent/JPH04116699U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6146493A (en) * | 1985-07-24 | 1986-03-06 | Hitachi Ltd | Manufacture of impeller for synthetic resin pump |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1878923A2 (en) | 2003-11-27 | 2008-01-16 | Daikin Industries, Ltd. | Impeller of centrifugal fan and centrifugal fan disposed with the impeller |
| US8007240B2 (en) | 2003-11-27 | 2011-08-30 | Daikin Industries, Ltd. | Impeller of centrifugal fan and centrifugal fan disposed with the impeller |
| WO2007040236A1 (en) | 2005-10-06 | 2007-04-12 | Mitsubishi Electric Corporation | Turbo fan and air conditioner |
| EP2980414A1 (en) | 2005-10-06 | 2016-02-03 | Mitsubishi Electric Corporation | Turbofan and air conditioner |
| US9234524B2 (en) | 2011-12-13 | 2016-01-12 | Minebea Co., Ltd. | Boundary layer controlled logarithmic spiral blade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19960924 |