TWI662195B - Blade structure and impeller composed of blade structure - Google Patents
Blade structure and impeller composed of blade structure Download PDFInfo
- Publication number
- TWI662195B TWI662195B TW107103073A TW107103073A TWI662195B TW I662195 B TWI662195 B TW I662195B TW 107103073 A TW107103073 A TW 107103073A TW 107103073 A TW107103073 A TW 107103073A TW I662195 B TWI662195 B TW I662195B
- Authority
- TW
- Taiwan
- Prior art keywords
- section
- pressurizing
- diversion
- pressurizing section
- straight
- Prior art date
Links
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 abstract description 13
- 238000007906 compression Methods 0.000 abstract description 13
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
一種葉片結構及由其組成之葉輪，其葉片結構具有呈板片狀之片體，該片體沿一延伸方向一體延伸，並於該片體上形成有依序相接之一第一加壓段、一第一導流段、一第二加壓段、一第二導流段以及一第三加壓段，其中該第一加壓段、該第二加壓段以及該第三加壓段分別呈平直狀，並於該第一加壓段、該第二加壓段以及該第三加壓段之相對兩側分別凸伸形成有一呈平直狀之連接部，而該第一導流段及該第二導流段則分別沿同一圓心弧線彎曲呈彎弧狀，並藉該葉片結構所組成之葉輪即可對氣體進行多段加壓之動作，以增強其出風量並進而達成大幅提升吸風力之目的。A blade structure and an impeller composed of the blade structure. The blade structure has a plate-like plate body, which integrally extends along an extending direction, and a first pressurizing in sequence is formed on the plate body. Section, a first diversion section, a second compression section, a second diversion section, and a third compression section, wherein the first compression section, the second compression section, and the third compression section The segments are straight, and a straight connecting portion is protruded from each of two opposite sides of the first, second and third pressurizing segments, and the first The diversion section and the second diversion section are respectively curved along the same central arc to form a curved arc, and the impeller composed of the blade structure can perform multi-stage pressurization of the gas to enhance its airflow and further achieve Greatly enhance the purpose of sucking wind.
Description
本發明係與風扇葉片之結構有關，特別是指一種葉片結構及由其組成之葉輪。The present invention relates to the structure of fan blades, and particularly to a blade structure and an impeller composed of the blade structure.
按，習知離心式之葉輪結構，如第６圖所示，主要具有二相對稱間隔設置之側盤６１，並於該二側盤６１之間的環設有數片弧形葉片６２，然由於該等弧形葉片６２皆僅具有單一弧度，而無法提供額外之加壓之功能，因此在實際之運轉使用上，其吸風力並不理想而無法達到較大吸風量及風壓的需求。According to the conventional centrifugal impeller structure, as shown in FIG. 6, it mainly has two side disks 61 arranged symmetrically, and a number of curved blades 62 are arranged in the ring between the two side disks 61. These curved blades 62 only have a single radian and cannot provide the function of additional pressure. Therefore, in actual operation and use, the suction of wind is not ideal and cannot meet the requirements of large suction volume and wind pressure.
再者，由於該等弧形葉片６２之端部皆呈彎弧狀，因此在運轉時無法有效地將氣體完全排出而容易在端部位置形成紊流，並進而導致葉片震動而會有較大之惱人噪音產生，且此等情形在葉片之轉速越快時，其震動現象與噪音將會更為明顯。Furthermore, because the ends of these curved blades 62 are curved, they cannot effectively exhaust gas completely during operation, and it is easy to form turbulence at the end positions, which in turn will cause large vibrations of the blades. Annoying noises are generated, and the vibration and noise of these conditions will become more obvious as the blades rotate faster.
有鑑於此，故如何改進習知弧形葉片６２之缺點，並提供一種吸風力大且可兼顧低噪音需求之葉片結構，即為本發明所欲解決之首要課題。In view of this, therefore, how to improve the shortcomings of the conventional curved blade 62 and provide a blade structure with large wind absorption and which can meet the requirements of low noise is the primary problem to be solved by the present invention.
本發明之主要目的在於提供一種葉片結構及由其組成之葉輪，其具有吸風力大，且可有效減少震動以降低噪音之功效。The main object of the present invention is to provide a blade structure and an impeller composed of the blade structure, which have a large suction power and can effectively reduce vibration to reduce noise.
為達前述之目的，本發明提供一種葉片結構，具有呈板片狀之片體，該片體沿一延伸方向一體延伸，並於該片體上形成有依序相接之一第一加壓段、一第一導流段、一第二加壓段、一第二導流段以及一第三加壓段，其中該第一加壓段、該第二加壓段以及該第三加壓段分別呈平直狀，並於該第一加壓段、該第二加壓段以及該第三加壓段之相對兩側分別凸伸形成有一呈平直狀之連接部，而該第一導流段及該第二導流段則分別沿同一圓心弧線彎曲呈彎弧狀。In order to achieve the foregoing object, the present invention provides a blade structure having a plate-like sheet body, the sheet body integrally extending along an extending direction, and a first pressing force sequentially formed on the sheet body is formed. Section, a first diversion section, a second compression section, a second diversion section, and a third compression section, wherein the first compression section, the second compression section, and the third compression section The segments are straight, and a straight connecting portion is protruded from each of two opposite sides of the first, second and third pressurizing segments, and the first The diversion section and the second diversion section are respectively curved in a curved shape along the same central arc.
較佳地，該第一加壓段、該第一導流段、該第二加壓段、該第二導流段以及該第三加壓段分別具有一沿該延伸方向延伸之長度，且該第一導流段與該第二導流段之長度分別大於該第一加壓段、該第二加壓段以及該第三加壓段之長度。Preferably, the first pressurizing section, the first diversion section, the second pressurizing section, the second diversion section, and the third pressurizing section each have a length extending along the extension direction, and The lengths of the first diversion section and the second diversion section are respectively longer than the lengths of the first pressurized section, the second pressurized section, and the third pressurized section.
更進一步地，該第一加壓段與該第三加壓段分別位於該片體之兩端位置，而該第二加壓段位於該片體之中央位置。Furthermore, the first pressurizing section and the third pressurizing section are respectively located at two ends of the sheet body, and the second pressurizing section is located at the center position of the sheet body.
再者，本發明更進一步地提供一種葉輪，其包含有： 二圓形側盤，呈同軸心間隔設置； 複數片之片體，等分環設於該二圓形側盤之間，並於該各片體上分別形成有沿一延伸方向依序相接之一第一加壓段、一第一導流段、一第二加壓段、一第二導流段以及一第三加壓段，其中該第一加壓段、該第二加壓段以及該第三加壓段分別呈平直狀，並於該第一加壓段、該第二加壓段以及該第三加壓段之相對兩側分別凸伸形成有一呈平直狀之連接部，且該各片體分別以其連接部對應嵌接於該二圓形側盤上，而該第一導流段及該第二導流段則分別沿同一圓心弧線彎曲呈彎弧狀。Furthermore, the present invention further provides an impeller, which includes: two circular side disks, which are arranged coaxially at intervals; a plurality of pieces of the body, an aliquot ring is provided between the two circular side disks, and A first pressurizing section, a first diversion section, a second pressurizing section, a second diversion section, and a third pressurizing section are sequentially formed on each sheet body in order along a direction of extension. Section, wherein the first pressurizing section, the second pressurizing section, and the third pressurizing section are respectively straight, and are in the first pressurizing section, the second pressurizing section, and the third pressurizing section. Opposite sides of the segments respectively protrude to form a straight connecting portion, and the pieces are correspondingly engaged with the two circular side plates with their connecting portions, and the first diversion segment and the first The two diversion sections are curved along curved lines along the same central arc.
較佳地，該葉輪具有十八片之片體，且各相鄰之片體分別以20度夾角等分環設於該二圓形側盤之間。Preferably, the impeller has eighteen piece bodies, and each adjacent piece body is respectively arranged between the two circular side plates at an angle of 20 degrees.
較佳地，該二圓形側盤上分別開設有複數個對應該各片體之連接部的平直狀嵌孔，而該各片體分別以其連接部對應嵌接於該二圓形側盤之平直狀嵌孔中，使該各片體定位於該二圓形側盤之間。Preferably, the two circular side plates are respectively provided with a plurality of straight insertion holes corresponding to the connecting portions of the respective sheet bodies, and the respective sheet bodies are correspondingly engaged with the two circular sides with their connecting portions. The flat inserting holes of the disc enable the pieces to be positioned between the two circular side discs.
而本發明之上述目的與優點，不難從下述所選用實施例之詳細說明與附圖中獲得深入了解。The above-mentioned objects and advantages of the present invention can be easily understood from the detailed description and accompanying drawings of selected embodiments below.
如第１、２圖所示，本發明提供一種葉片結構，具有呈一體板片狀之片體１１，並於該片體１１上形成有沿一延伸方向依序相接之一第一加壓段１１１、一第一導流段１１２、一第二加壓段１１３、一第二導流段１１４以及一第三加壓段１１５，其中：As shown in FIG. 1 and FIG. 2, the present invention provides a blade structure having a sheet body 11 having an integrated plate shape, and a first pressing force sequentially formed along the extending direction is formed on the sheet body 11. Section 111, a first diversion section 112, a second pressurized section 113, a second diversion section 114, and a third pressurized section 115, of which:
該第一加壓段１１１、該第二加壓段１１３以及該第三加壓段１１５分別呈平直狀，並於該第一加壓段１１１、該第二加壓段１１３以及該第三加壓段１１５之相對兩側分別一體凸伸形成有一呈平直狀之連接部１２，而該第一導流段１１２及該第二導流段１１４則分別沿同一圓心弧線Ｒ彎曲呈彎弧狀。The first pressurizing section 111, the second pressurizing section 113, and the third pressurizing section 115 are respectively straight, and are formed in the first pressurizing section 111, the second pressurizing section 113, and the third pressurizing section. The opposite sides of the pressurizing section 115 are integrally protruded to form a straight connecting portion 12 respectively, and the first diversion section 112 and the second diversion section 114 are respectively curved along the same central arc R to form a curved arc. shape.
該第一加壓段１１１與該第三加壓段１１５分別位於該片體１１之兩端位置，而該第二加壓段１１３位於該片體１１之中央位置，且該第一加壓段１１１、該第一導流段１１２、該第二加壓段１１３、該第二導流段１１４以及該第三加壓段１１５分別具有一沿該延伸方向延伸之長度Ｌ１、Ｌ２、Ｌ３、Ｌ４、Ｌ５，該第一導流段１１２與該第二導流段１１４之長度Ｌ２、Ｌ４相等，而該第一導流段１１２與該第二導流段１１４之長度Ｌ２、Ｌ４分別大於該第一加壓段１１１、該第二加壓段１１３及該第三加壓段１１５之長度Ｌ１、Ｌ３、Ｌ５。The first pressurizing section 111 and the third pressurizing section 115 are respectively located at both ends of the sheet body 11, and the second pressurizing section 113 is located at the center position of the sheet body 11, and the first pressurizing section 111, the first diversion section 112, the second pressurized section 113, the second diversion section 114 and the third pressurized section 115 each have a length L1, L2, L3, L4 extending along the extension direction. , L5, the lengths L2 and L4 of the first diversion section 112 and the second diversion section 114 are equal, and the lengths L2 and L4 of the first diversion section 112 and the second diversion section 114 are greater than the first diversion section 112 respectively. The lengths L1, L3, and L5 of a pressurizing section 111, the second pressurizing section 113, and the third pressurizing section 115.
而藉由上述結構特徵所組成之葉片結構，透過其呈平直狀之第一加壓段１１１、第二加壓段１１３及第三加壓段１１５即可提供葉片在運轉時，可有效地對氣流進行一拍擊加壓之動作，並進而即可對氣體進行多段加壓之動作，以增強其出風量並進而即可達成大幅提升吸風力之目的；且由於該第一導流段１１２與該第二導流段１１４之長度Ｌ２、Ｌ４分別大於該第一加壓段１１１、該第二加壓段１１３以及該第三加壓段１１５之長度Ｌ１、Ｌ３、Ｌ５，因此該第一加壓段１１１、該第二加壓段１１３以及該第三加壓段１１５所提供之加壓動作，並不致影響葉片運轉時氣體流動時之順暢性。With the blade structure composed of the above structural features, the first pressure section 111, the second pressure section 113, and the third pressure section 115, which are straight, can provide the blade effectively during operation. Performing a single tap and pressurizing action on the air flow, and then multi-stage pressurizing action on the gas to increase its air output and further achieve the purpose of greatly increasing the suction wind; and because the first diversion section 112 The lengths L2 and L4 of the second diversion section 114 are longer than the lengths L1, L3, and L5 of the first compression section 111, the second compression section 113, and the third compression section 115, respectively. The pressurizing action provided by the pressurizing section 111, the second pressurizing section 113, and the third pressurizing section 115 does not affect the smoothness of the gas flow during the blade operation.
接著如第３～５圖所示，本發明更進一步提供一種利用上述葉片結構所組成之葉輪２０，該葉輪２０主要由二圓形側盤２１以及複數片環設於該二圓形側盤２１間之片體１１所構成，其中：Next, as shown in FIGS. 3 to 5, the present invention further provides an impeller 20 composed of the above-mentioned blade structure. The impeller 20 is mainly composed of two circular side disks 21 and a plurality of rings are arranged on the two circular side disks 21. The interval sheet 11 is composed of:
該二圓形側盤２１，呈同軸心間隔對稱設置，而該各片體１１以同向曲面等分環設於該二圓形側盤２１之間，並分別以朝向該二圓形側盤２１之軸心方向呈環狀配置，且於該二圓形側盤２１上分別開設有複數個對應該各片體１１兩側連接部１２之平直狀嵌孔２２，而該各片體１１分別以其兩側之連接部１２對應嵌接於該二圓形側盤２１之平直狀嵌孔２２中，使該各片體１１定位於該二圓形側盤２１之間，且該二圓形側盤２１上對應該各連接部１２所開設之平直狀嵌孔２１具有容易加工、組裝之優點，而該葉輪２０具有十八片之片體１１，且各相鄰之片體１１分別以20度夾角等分環設於該二圓形側盤２１之間，使各相鄰片體１１之間可分別形成有一氣流通道２３。The two circular side plates 21 are symmetrically arranged at a concentric interval, and the pieces 11 are arranged between the two circular side plates 21 in an equally curved surface, and are respectively oriented toward the two circular side plates. The axis direction of 21 is arranged in a ring shape, and a plurality of straight insertion holes 22 corresponding to the connecting portions 12 on both sides of each sheet body 11 are respectively formed on the two circular side plates 21, and the sheet bodies 11 The connecting portions 12 on both sides are respectively engaged with the straight insertion holes 22 of the two circular side plates 21, so that the pieces 11 are positioned between the two circular side plates 21, and the two The straight side insert 21 provided on the circular side plate 21 corresponding to each connecting portion 12 has the advantage of being easy to process and assemble, and the impeller 20 has eighteen pieces 11 and each adjacent piece 11 Rings are divided between the two circular side plates 21 at an angle of 20 degrees, so that an air flow channel 23 can be formed between each adjacent sheet body 11.
而當該葉輪２０被驅動而開始轉動時，即可令氣體進入各相鄰片體１１之氣流通道２３中，並透過該各片體１１呈平直狀之第一加壓段１１１之拍擊，以可對氣體進行第一段之加壓，而經第一段加壓後之氣體接著再經由該第一導流段１１２之導流，而進入該第二加壓段１１３中進行第二段之加壓，最後再經由該第二導引段１１４之導流，而可由該第三加壓段１１５拍擊加壓後迅速排出，如此一來，即可藉由增強其出風量而達成大幅提升吸風力之目的。When the impeller 20 is driven and starts to rotate, the gas can be caused to enter the air flow channel 23 of each adjacent sheet body 11 and pass through the flapping of the first pressurizing section 111 which is flat and straight. So that the gas can be pressurized in the first stage, and the pressurized gas in the first stage then passes through the first diversion section 112 for diversion and enters the second pressurization section 113 for the second time. The pressure of the segment is finally passed through the second guide segment 114, and then the third pressure segment 115 can be quickly discharged after being tapped and pressurized. In this way, it can be achieved by increasing its air output. Greatly enhance the purpose of sucking wind.
且由於本發明所提供之葉片結構，呈平直狀之第一加壓段１１１及第三加壓段１１５係分別位於該片體１１之兩端位置，並藉由其呈平直狀之形狀，而可有效地將氣體加壓排出，藉此即可使其運轉時不易於其端部位置形成紊流，並進而即可有效減少葉片於運轉時所產生之震動與噪音。Moreover, due to the blade structure provided by the present invention, the first pressing section 111 and the third pressing section 115 which are straight are respectively located at both ends of the sheet body 11 and have a straight shape through them. The gas can be effectively discharged under pressure, thereby making it difficult to form turbulence at the end position during operation, and further reducing the vibration and noise generated by the blade during operation.
再者，本發明所提供之葉輪２０係以多達十八片之片體以20度夾角等分環設於該二圓形側盤２１之間，並藉由增加該各片體１１之數量即可更進一步地增強本發明所提供葉輪１０之出風量。In addition, the impeller 20 provided by the present invention is provided with up to eighteen pieces of the body at a 20-degree angle between the two circular side plates 21, and by increasing the number of each piece 11 That is, the air output of the impeller 10 provided by the present invention can be further enhanced.
綜上所述，當可使熟知本項技藝者明瞭本發明確可達成前述目的，實已符合專利法之規定，因此依法提出申請。In summary, when those skilled in the art can be made aware that the present invention can indeed achieve the aforementioned purpose, it has indeed complied with the provisions of the Patent Law, and therefore filed an application in accordance with the law.
（習知部分）(Learning section)
６１‧‧‧側盤 61 · ‧‧Side plate
６２‧‧‧弧形葉片 62‧‧‧ curved blade
（本發明部分） (Part of the invention)
１１‧‧‧片體 11‧‧‧ pieces
１１１‧‧‧第一加壓段 111 · ‧‧The first pressurizing section
１１２‧‧‧第一導流段 112 · ‧‧ first diversion section
１１３‧‧‧第二加壓段 113 · ‧‧Second pressurizing section
１１４‧‧‧第二導流段 114 · ‧‧Second Diversion Section
１１５‧‧‧第三加壓段 115 · ‧‧The third pressurized section
１２‧‧‧連接部 12‧‧‧ Connection Department
Ｒ‧‧‧圓心弧線 R‧‧‧ center arc
Ｌ１、Ｌ２、Ｌ３、Ｌ４、Ｌ５‧‧‧長度 L1, L2, L3, L4, L5‧‧‧ length
２１‧‧‧圓形側盤 21‧‧‧ round side plate
２２‧‧‧平直狀嵌孔 22‧‧‧Straight caulking
２３‧‧‧氣流通道 23‧‧‧airflow channel
第１圖為本發明所提供葉片結構之立體外觀圖。 第２圖為本發明所提供葉片結構之側視圖。 第３圖為本發明所提供葉輪之分解示意圖。 第４圖為本發明所提供葉輪於組裝後立體外觀圖。 第５圖為本發明所提供葉輪之結構示意圖。 第６圖為習知離心式葉輪之結構示意圖。FIG. 1 is a three-dimensional appearance view of a blade structure provided by the present invention. Figure 2 is a side view of the blade structure provided by the present invention. FIG. 3 is an exploded view of the impeller provided by the present invention. FIG. 4 is a perspective view of the impeller provided in the present invention after assembly. FIG. 5 is a schematic structural diagram of an impeller provided by the present invention. Figure 6 shows the structure of a conventional centrifugal impeller.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107103073A TWI662195B (en) | 2018-01-29 | 2018-01-29 | Blade structure and impeller composed of blade structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107103073A TWI662195B (en) | 2018-01-29 | 2018-01-29 | Blade structure and impeller composed of blade structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TWI662195B true TWI662195B (en) | 2019-06-11 |
| TW201932718A TW201932718A (en) | 2019-08-16 |
Family
ID=67764441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW107103073A TWI662195B (en) | 2018-01-29 | 2018-01-29 | Blade structure and impeller composed of blade structure |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TWI662195B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010209797A (en) * | 2009-03-10 | 2010-09-24 | Daikin Ind Ltd | Cross-flow fan, and air conditioner including the same |
| CN203362558U (en) * | 2013-07-23 | 2013-12-25 | 长沙金马冶金设备有限公司 | Suction fan for secondary lead process |
| CN103573694A (en) * | 2012-07-26 | 2014-02-12 | 珠海格力电器股份有限公司 | Cross-flow impeller, cross-flow fan and wall-mounted air conditioner |
| US20140093366A1 (en) * | 2012-10-03 | 2014-04-03 | Minebea Co., Ltd. | Centrifugal fan |
| CN104019059A (en) * | 2013-02-28 | 2014-09-03 | 泰拉尔株式会社 | Centrifugal blower |
| CN104806565A (en) * | 2014-01-23 | 2015-07-29 | 德昌电机(深圳)有限公司 | Centrifugal impeller, fan and household device |
| TWM566273U (en) * | 2018-01-29 | 2018-09-01 | 王勝豊 | Blade structure and impeller composed thereof |
-
2018
- 2018-01-29 TW TW107103073A patent/TWI662195B/en not_active IP Right Cessation
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010209797A (en) * | 2009-03-10 | 2010-09-24 | Daikin Ind Ltd | Cross-flow fan, and air conditioner including the same |
| CN103573694A (en) * | 2012-07-26 | 2014-02-12 | 珠海格力电器股份有限公司 | Cross-flow impeller, cross-flow fan and wall-mounted air conditioner |
| US20140093366A1 (en) * | 2012-10-03 | 2014-04-03 | Minebea Co., Ltd. | Centrifugal fan |
| CN104019059A (en) * | 2013-02-28 | 2014-09-03 | 泰拉尔株式会社 | Centrifugal blower |
| CN203362558U (en) * | 2013-07-23 | 2013-12-25 | 长沙金马冶金设备有限公司 | Suction fan for secondary lead process |
| CN104806565A (en) * | 2014-01-23 | 2015-07-29 | 德昌电机(深圳)有限公司 | Centrifugal impeller, fan and household device |
| TWM566273U (en) * | 2018-01-29 | 2018-09-01 | 王勝豊 | Blade structure and impeller composed thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201932718A (en) | 2019-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7219748B2 (en) | Impellers, impellers, and axial-flow, diagonal-flow or radial-flow ventilators used for impellers of ventilation systems | |
| CN208294835U (en) | Blade and the axial wheel for using it | |
| JP2008223741A (en) | Centrifugal blower | |
| TWI662195B (en) | Blade structure and impeller composed of blade structure | |
| TWM240487U (en) | Modified centrifugal fan wheel | |
| WO2015146007A1 (en) | Air-blowing device | |
| JP2009541661A (en) | Centrifugal impeller | |
| CN101349282A (en) | Impeller set | |
| CN211423009U (en) | Frequency-adjustable noise-reducing centrifugal ventilator and volute thereof | |
| JP2004506141A (en) | Centrifugal fan | |
| TWM566273U (en) | Blade structure and impeller composed thereof | |
| WO2018179075A1 (en) | Propeller fan | |
| CN110925240A (en) | Frequency-adjustable noise-reducing centrifugal ventilator and volute thereof | |
| CN107143526B (en) | Centrifugal fan | |
| JP5478465B2 (en) | Multiblade centrifugal fan and multiblade centrifugal blower | |
| WO2019011315A1 (en) | Centrifugal vane wheel and centrifugal fan comprising same and dust collector | |
| JP2014139412A (en) | Multiblade centrifugal fan and multiblade centrifugal blower including the same | |
| JP2000009083A (en) | Impeller | |
| US3859009A (en) | Centrifugal blower | |
| JP2011202560A (en) | Electric blower and electric vacuum cleaner using the same | |
| WO2018028205A1 (en) | Wind wheel and blower using the same | |
| CN111219363B (en) | Fan shell and fan wheel combined structure and fan shell thereof | |
| WO2022191034A1 (en) | Propeller fan and refrigeration device | |
| CN216591868U (en) | Check valve structure and range hood | |
| WO2021051789A1 (en) | Induced draft fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Annulment or lapse of patent due to non-payment of fees |