JP2006275024A - Blower - Google Patents

Blower Download PDF

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Publication number
JP2006275024A
JP2006275024A JP2005099427A JP2005099427A JP2006275024A JP 2006275024 A JP2006275024 A JP 2006275024A JP 2005099427 A JP2005099427 A JP 2005099427A JP 2005099427 A JP2005099427 A JP 2005099427A JP 2006275024 A JP2006275024 A JP 2006275024A
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Japan
Prior art keywords
centrifugal fan
air passage
scroll casing
air
tongue
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JP2005099427A
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Japanese (ja)
Inventor
Hideto Nagata
英人 永田
Minoru Sekine
実 関根
Emi Shiina
恵美 椎名
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Marelli Corp
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Calsonic Kansei Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent generation of surging noise due to reverse flow of blast while cooling a heat radiation plate. <P>SOLUTION: In a blower 1 forming an air duct 4 composed of a circumference part air duct 4a and a downstream air duct 4b, provided with a scroll casing 5 including a tongue part 7 projecting at a boundary position of the circumference part air duct 4a and the downstream air duct 4b, and having the heat radiation plate 6 arranged in the air duct 4, the heat radiation plate 6 is arranged along a tangential line L1 direction of a centrifugal fan 3 and has one end a1 thereof positioned in an upstream side of a diameter line L2 in a blast direction A, and has an extended line L4 of the plate 6 crossing (b) with a line L3 connecting the tongue part 7 and an outer circumference of a centrifugal fan 3 on a blow off port side of a scroll casing 5, and is arranged in a position where shortest distance S1 from an outer circumference of a centrifugal fan 3, shortest distance S2 from an inner wall surface of the scroll casing 5 and shortest distance S3 from an outer wall surface of the scroll casing 5 are each longer than the distance S between the centrifugal fan 3 and the tongue part 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、送風路内に放熱板が配置されたスクロール式の送風機に関する。   The present invention relates to a scroll type blower in which a heat radiating plate is disposed in a blower passage.

この種の従来の送風機としては、特許文献１に開示されたものがある。この送風機５０は、図４及び図５に示すように、モータ５１と、このモータ５１の駆動力で回転する遠心ファン５２と、遠心ファン５２の外周を被い、内部に送風路５３を形成するスクロールケーシング５４と、このスクロールケーシング５４内の送風路５３に配置された抵抗体の放熱板５５とを備えている。   A conventional blower of this type is disclosed in Patent Document 1. As shown in FIGS. 4 and 5, the blower 50 covers a motor 51, a centrifugal fan 52 that rotates by the driving force of the motor 51, and an outer periphery of the centrifugal fan 52, and forms a blower passage 53 therein. A scroll casing 54 and a resistor heat radiation plate 55 disposed in a blower passage 53 in the scroll casing 54 are provided.

スクロールケーシング５４の送風路５３は、遠心ファン５２の外周側の円周部送風路５３ａと、この円周部送風路５３ａに連続する下流送風路５３ｂとから構成されている。円周部送風路５３ａと下流送風路５３ｂとの境界位置では、スクロールケーシング５４の舌部５６が内周側から外周側に向かって突出されている。抵抗体の放熱板５５は、送風路５３の外壁面５４ａの近傍で、且つ、外壁面５４ａに沿って配置されている。   The air blowing path 53 of the scroll casing 54 includes a circumferential air blowing path 53a on the outer peripheral side of the centrifugal fan 52 and a downstream air blowing path 53b continuous to the circumferential air blowing path 53a. At the boundary position between the circumferential air passage 53a and the downstream air passage 53b, the tongue 56 of the scroll casing 54 protrudes from the inner peripheral side toward the outer peripheral side. The heat radiating plate 55 of the resistor is disposed in the vicinity of the outer wall surface 54a of the air passage 53 and along the outer wall surface 54a.

上記構成において、遠心ファン５２が回転すると、スクロールケーシング５４内に空気の回転流が発生し、この回転空気流によってスクロールケーシング５４の内周側が減圧され、外周側が加圧される。これによって内周側の空気吸引口よりスクロールケーシング５４内に空気が吸引され、スクロールケーシング５４内に吸引された空気が円周部送風路５３ａで回転流となって下流送風路５３ｂを介して下流の空調ユニット６０に送風される。この送風が放熱板５５の周囲を通過することによって放熱板５５が冷却される。このように、送風機５０の送風を利用して放熱板５５上の抵抗体を冷却するようになっている。
実開平２−１４９３０４号公報 In the above configuration, when the centrifugal fan 52 rotates, a rotating flow of air is generated in the scroll casing 54, and the inner peripheral side of the scroll casing 54 is depressurized and the outer peripheral side is pressurized by the rotating air flow. As a result, air is sucked into the scroll casing 54 from the air suction port on the inner peripheral side, and the air sucked into the scroll casing 54 becomes a rotating flow in the circumferential air blowing path 53a and is downstream via the downstream air blowing path 53b. The air conditioning unit 60 is blown. The air flow passes through the periphery of the heat radiating plate 55 to cool the heat radiating plate 55. In this way, the resistor on the heat radiating plate 55 is cooled by using the air blower 50.
Japanese Utility Model Publication No. 2-149304

しかしながら、スクロール式の送風機５０では、円周部送風路５３ａと下流送風路５３ｂの境界位置で内周側から外周側に向かって舌部５６が配置されている。従って、送風路５３内の舌部５６の近傍領域は、円周部送風路５３ａの空気回転流Ｂの上流側となることや、円周部送風路５３ａから下流送風路５３ｂへの送風が回転空気流の遠心力を利用することから減圧領域となる。このように舌部５６の辛抱領域が減圧領域となると、下流送風路５３ｂに入り込んだ送風が舌部５６の近傍領域を通って円周部送風路５３ａに逆流し、逆流された空気が遠心ファン５２に吸引される。すると、このような送風の逆流によってサージング音が発生するという問題がある。   However, in the scroll type blower 50, the tongue portion 56 is disposed from the inner peripheral side toward the outer peripheral side at the boundary position between the circumferential portion air passage 53a and the downstream air passage 53b. Accordingly, the region near the tongue 56 in the air blowing path 53 is on the upstream side of the air rotation flow B of the circumferential air blowing path 53a, and the air blowing from the circumferential air blowing path 53a to the downstream air blowing path 53b is rotated. Since the centrifugal force of the air flow is used, the pressure is reduced. Thus, when the perseverance region of the tongue 56 becomes a decompression region, the air that has entered the downstream air passage 53b flows back to the circumferential air passage 53a through a region near the tongue 56, and the air that has flowed back is a centrifugal fan. 52 is aspirated. Then, there exists a problem that a surging sound generate | occur | produces by the backflow of such ventilation.

そこで、本発明は、放熱板を冷却しつつ、送風の逆流によるサージング音の発生を極力防止できる送風機を提供することを目的とする。   Then, an object of this invention is to provide the air blower which can prevent generation | occurrence | production of the surging sound by the backflow of ventilation, as much as possible, cooling a heat sink.

上記目的を達成する請求項１の発明は、駆動源の駆動で回転される遠心ファンと、この遠心ファンの外周を被いつつ、遠心ファンの外周側にスクロール状の円周部送風路とこの円周部送風路に連続する下流送風路からなる送風路と該遠心ファンの円周に沿って該円周部送風路の最上流部から最下流部に向かって突出する舌部とを具備するスクロールケーシングとを備え、該送風路内に平板状の放熱板が配置された送風機において、前記放熱板は、前記遠心ファンの接線方向に沿って配置されると共に前記放熱板の一端が当該接線の直径線よりも送風方向の上流側に、且つ、前記遠心ファンの外周と前記舌部とを結んだ線と前記放熱板の延長線とが前記スクロールケーシングの吹出口側で交差し、且つ、前記遠心ファンの外周からの最短距離と、前記スクロールケーシングの内壁面からの最短距離と、前記スクロールケーシングの外壁面からの最短距離とが共に前記遠心ファンと前記舌部間の距離よりも離れた位置に配置されたことを特徴とする。   The invention according to claim 1 that achieves the above object includes a centrifugal fan that is rotated by driving of a drive source, a scroll-shaped circumferential air passage on the outer peripheral side of the centrifugal fan, An air passage composed of a downstream air passage that is continuous with the circumferential air passage, and a tongue that protrudes from the most upstream portion of the circumferential air passage toward the most downstream portion along the circumference of the centrifugal fan. In the blower including a scroll casing and a flat radiator plate disposed in the air passage, the radiator plate is arranged along a tangential direction of the centrifugal fan, and one end of the radiator plate is connected to the tangent line. The line connecting the outer periphery of the centrifugal fan and the tongue and the extension line of the heat sink intersect at the upstream side in the blowing direction from the diameter line on the outlet side of the scroll casing, and The shortest distance from the outer periphery of the centrifugal fan The shortest distance between the inner wall surface of the scroll casing, characterized in that the shortest distance from the outer wall surface of the scroll casing is arranged together at a position away than the distance between the centrifugal fan and the tongue.

請求項２の発明は、請求項１記載の送風機であって、前記放熱板は、その端部が前記遠心ファンの中心と前記舌部の先端とを結ぶ直線よりも送風方向の上流側に配置されたことを特徴とする。   Invention of Claim 2 is an air blower of Claim 1, Comprising: The said heat sink is arrange | positioned in the upstream of the ventilation direction rather than the straight line which connects the center of the said centrifugal fan, and the front-end | tip of the said tongue part. It is characterized by that.

本願発明によれば、遠心ファンが回転すると、円周部送風路に空気の回転流が発生し、この回転空気流が下流送風路を介して排出され、送風路に配置された放熱板の周囲を送風が通過する。又、このような円周部送風路から下流送風路への送風によって、円周部送風路と下流送風路の境界の舌部付近が減圧領域になり、下流送風路から円周部送風路に逆風が流れようとするが、その逆流の流れる位置に放熱板が配置されるため逆風の発生が極力阻止される。以上より、放熱板を放熱でき、しかも、送風の逆流によるサージング音の発生を極力防止できる。   According to the present invention, when the centrifugal fan rotates, a rotating flow of air is generated in the circumferential air passage, and this rotating air flow is discharged through the downstream air passage, and the periphery of the heat radiating plate disposed in the air passage. The blast passes through. In addition, due to the air flow from the circumferential air passage to the downstream air passage, the vicinity of the tongue at the boundary between the circumferential air passage and the downstream air passage becomes a decompression region, and the downstream air passage becomes the circumferential air passage. Although the reverse wind is about to flow, the heat sink is arranged at the position where the reverse flow flows, so that the generation of the reverse wind is prevented as much as possible. From the above, it is possible to dissipate heat from the heat radiating plate and to prevent generation of surging noise due to the backflow of air.

以下、本発明の一実施形態を図面に基づいて説明する。図１〜図３は本発明の一実施形態を示し、図１は送風機１の横断面図、図２は送風機１の平面図、図３は図２のＡ−Ａ線断面図である。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of the present invention, FIG. 1 is a cross-sectional view of the blower 1, FIG. 2 is a plan view of the blower 1, and FIG. 3 is a cross-sectional view taken along line AA of FIG.

図１〜図３に示すように、送風機１は、駆動源であるモータ２（図３に示す）と、このモータ２の駆動力で回転する遠心ファン３と、遠心ファン３の外周を被い、内部に送風路４を形成するスクロールケーシング５と、このスクロールケーシング５の送風路４に配置された抵抗体の放熱板６とを備えている。   As shown in FIGS. 1 to 3, the blower 1 covers a motor 2 (shown in FIG. 3) that is a driving source, a centrifugal fan 3 that is rotated by the driving force of the motor 2, and an outer periphery of the centrifugal fan 3. A scroll casing 5 that forms an air passage 4 inside, and a resistor heat dissipating plate 6 disposed in the air passage 4 of the scroll casing 5 are provided.

遠心ファン３は、多数のフィン部が円筒状に配置されている。遠心ファン３が回転すると、多数のフィン部間の空気が外周側に送り出すような空気流を形成する。   The centrifugal fan 3 has a large number of fins arranged in a cylindrical shape. When the centrifugal fan 3 rotates, an air flow is formed such that the air between the numerous fin portions is sent to the outer peripheral side.

スクロールケーシング５の送風路４は、遠心ファン３の外周側に配置される円周部送風路４ａと、この円周部送風路４ａに連続する下流送風路４ｂとから構成されている。スクロールケーシング５には、遠心ファン３の円周に沿って円周部送風路４ａの最上流部から最下流部に向かって突出する舌部７（図１に示す）又、スクロールケーシング５の上下面で、且つ、遠心ファン３の内周位置には、空気吸い込み口８がそれぞれ形成されている。スクロールケーシング５の下流送風路４ｂの他端には、空気吹出し口（図示せず）が形成され、この空気吹き出し口にはエバポレータ等を内蔵する空調ユニット（図示せず）が接続される。   The air blowing path 4 of the scroll casing 5 includes a circumferential air blowing path 4a disposed on the outer peripheral side of the centrifugal fan 3 and a downstream air blowing path 4b continuous with the circumferential air blowing path 4a. The scroll casing 5 includes a tongue 7 (shown in FIG. 1) that protrudes from the most upstream portion of the circumferential air passage 4 a toward the most downstream portion along the circumference of the centrifugal fan 3. Air suction ports 8 are formed on the lower surface and on the inner peripheral position of the centrifugal fan 3. An air outlet (not shown) is formed at the other end of the downstream air passage 4b of the scroll casing 5, and an air conditioning unit (not shown) incorporating an evaporator or the like is connected to the air outlet.

放熱板６は、平板状に形成され、例えばその表面に抵抗体が配設されており、少なくとも以下の３条件を満たす送風路４の位置に配置されている。第１に、放熱板６は、遠心ファン３の接線Ｌ１の方向に沿って、且つ、その一端ａ１が当該接線Ｌ１の直径線Ｌ２よりも送風方向Ａの上流側に位置されている。第２に、放熱板６は、遠心ファン３の外周と舌部７とを結んだ線Ｌ３と、放熱板６の延長線Ｌ４とがスクロールケーシング５の吹出口側で交差ｂするよう配置されている。第３に、放熱板６は、遠心ファン３の外周からの最短距離Ｓ１と、スクロールケーシング５の内壁面からの最短距離Ｓ２と、スクロールケーシング５の外壁面からの最短距離Ｓ３とが共に遠心ファン３と舌部７間の距離Ｓよりも離れた位置に配置されている。   The heat radiating plate 6 is formed in a flat plate shape, for example, a resistor is disposed on the surface thereof, and is disposed at a position of the air passage 4 satisfying at least the following three conditions. 1stly, the heat sink 6 is located along the direction of the tangent L1 of the centrifugal fan 3, and the one end a1 is located in the upstream of the ventilation direction A rather than the diameter line L2 of the said tangent L1. Secondly, the heat radiating plate 6 is arranged such that a line L3 connecting the outer periphery of the centrifugal fan 3 and the tongue 7 intersects with an extension line L4 of the heat radiating plate 6 on the outlet side of the scroll casing 5. Yes. Third, the heat radiating plate 6 is a centrifugal fan having a shortest distance S1 from the outer periphery of the centrifugal fan 3, a shortest distance S2 from the inner wall surface of the scroll casing 5, and a shortest distance S3 from the outer wall surface of the scroll casing 5. 3 and the tongue 7 are arranged at positions farther than the distance S.

つまり、放熱板６は、第１及び第２の条件より、送風路４の舌部７寄りの位置に配置されるが、円周部送風路４ａの回転空気流の流れを阻害せず、且つ、むしろ回転空気流のスムーズな流れを担保する位置に配置される。第３の条件より、放熱板６は、円周部送風路４ａの幅より狭くなるような箇所を新たに送風路４内に形成しない位置に設置される。   That is, the heat radiating plate 6 is disposed at a position closer to the tongue portion 7 of the air passage 4 than the first and second conditions, but does not hinder the flow of the rotating air flow in the circumferential portion air passage 4a, and Rather, it is arranged at a position that ensures a smooth flow of the rotating air flow. From the 3rd condition, the heat sink 6 is installed in the position which does not newly form the location in the ventilation path 4 which becomes narrower than the width | variety of the circumferential part ventilation path 4a.

又、この実施形態では、上記３条件に加え、第４の条件として、放熱板６は、その他端ａ２が遠心ファン３の中心Ｏと舌部７の先端とを結ぶ直線Ｌ５よりも送風方向Ａの上流側に配置されている。   In this embodiment, in addition to the above three conditions, as a fourth condition, the heat radiating plate 6 has the other end a2 in the blowing direction A than the straight line L5 connecting the center O of the centrifugal fan 3 and the tip of the tongue portion 7. It is arranged on the upstream side.

上記構成において、遠心ファン３が回転すると、遠心ファン３の内周側の圧力が外周側よりも下がり、空気吸い込み口８よりスクロールケーシング５内に空気が吸引される。この吸引された空気は遠心ファン３の回転によって円周部送風路４ａに送られ、遠心ファン３の回転によって回転流となる。円周部送風路４ａの空気回転流はその遠心力によって下流送風路４ｂを通って下流に送風される。そして、送風路４内に配置された放熱板６の周囲を送風が通過するため、放熱板６が冷却される。   In the above configuration, when the centrifugal fan 3 rotates, the pressure on the inner peripheral side of the centrifugal fan 3 is lower than that on the outer peripheral side, and air is sucked into the scroll casing 5 from the air suction port 8. The sucked air is sent to the circumferential air passage 4 a by the rotation of the centrifugal fan 3, and becomes a rotating flow by the rotation of the centrifugal fan 3. The air rotation flow of the circumferential air passage 4a is blown downstream by the centrifugal force through the downstream air passage 4b. And since ventilation passes the circumference | surroundings of the heat sink 6 arrange | positioned in the ventilation path 4, the heat sink 6 is cooled.

又、送風路４内の送風は、円周部送風路４ａの空気回転流の遠心力によるため、円周部送風路４ａと下流送風路４ｂの境界位置では、その内周側である舌部７付近の圧力が低下して減圧領域になり、下流送風路４ｂから舌部７の近傍領域を通って送風が円周部送風路４ａに逆流しようとする。しかし、その逆流が形成される位置には放熱板６が配置されているため、逆風の発生が極力阻止される。   In addition, since the air in the air passage 4 is due to the centrifugal force of the air rotation flow in the circumferential air passage 4a, the tongue on the inner circumferential side at the boundary position between the circumferential air passage 4a and the downstream air passage 4b. The pressure in the vicinity of 7 decreases to a reduced pressure region, and the air flows from the downstream air passage 4b through the region in the vicinity of the tongue portion 7 to flow backward to the circumferential air passage 4a. However, since the heat radiating plate 6 is disposed at a position where the backflow is formed, generation of the backwind is prevented as much as possible.

以上により、放熱板６を冷却しつつ、送風の逆流によるサージング音の発生を極力防止できる。   As described above, it is possible to prevent the generation of surging sound due to the backflow of the air as much as possible while cooling the heat sink 6.

また、空気吸い込み口８から水が進入した場合には、比重の重い水は送風路４の外壁面に沿って、若しくは、外壁面の近傍を送風と共に流れるため、送風路４の内周側に配置された放熱板６に水が掛かる可能性が低減され、被水による故障が減少するという効果もある。   In addition, when water enters from the air suction port 8, water having a high specific gravity flows along with the air flow along the outer wall surface of the air passage 4 or in the vicinity of the outer wall surface. The possibility of water splashing on the arranged radiator plate 6 is reduced, and there is an effect that failure due to water is reduced.

本発明の一実施形態を示し、送風機の横断面図である。1 shows an embodiment of the present invention and is a cross-sectional view of a blower. 本発明の一実施形態を示し、送風機の平面図である。1 is a plan view of a blower according to an embodiment of the present invention. 本発明の一実施形態を示し、図２のＡ−Ａ線断面図である。FIG. 3 shows an embodiment of the present invention and is a cross-sectional view taken along line AA in FIG. 2. 従来例の送風機の斜視図である。It is a perspective view of the air blower of a prior art example. 従来例の送風機の横断面図である。It is a cross-sectional view of a blower of a conventional example.

符号の説明Explanation of symbols

１ 送風機
２ モータ（駆動源）
３ 遠心ファン
４ 送風路
４ａ 円周部送風路
４ｂ 下流送風路
５ スクロールケーシング
６ 放熱板
７ 舌部 1 Blower 2 Motor (drive source)
3 Centrifugal fan 4 Air passage 4a Circumferential air passage 4b Downstream air passage 5 Scroll casing 6 Heat sink 7 Tongue

Claims (2)

駆動源（２）の駆動で回転される遠心ファン（３）と、この遠心ファン（３）の外周を被いつつ、遠心ファン（３）の外周側にスクロール状の円周部送風路（４ａ）とこの円周部送風路（４ａ）に連続する下流送風路（４ｂ）からなる送風路（４）と該遠心ファン（３）の円周に沿って該円周部送風路（４ａ）の最上流部から最下流部に向かって突出する舌部（７）とを具備するスクロールケーシング（５）とを備え、該送風路（４）内に平板状の放熱板（６）が配置された送風機（１）において、
前記放熱板（６）は、
前記遠心ファン（３）の接線（Ｌ１）方向に沿って配置されると共に前記放熱板（６）の一端（ａ１）が当該接線（Ｌ１）の直径線（Ｌ２）よりも送風方向（Ａ）の上流側に、且つ、
前記遠心ファン（３）の外周と前記舌部（７）とを結んだ線（Ｌ３）と前記放熱板（６）の延長線（Ｌ４）とが前記スクロールケーシング（４）の吹出口側で交差（ｂ）し、且つ、
前記遠心ファン（３）の外周からの最短距離（Ｓ１）と、前記スクロールケーシング（５）の内壁面からの最短距離（Ｓ２）と、前記スクロールケーシング（５）の外壁面からの最短距離（Ｓ３）とが共に前記遠心ファン（３）と前記舌部（７）間の距離（Ｓ）よりも離れた位置に配置されたことを特徴とする送風機（１）。 The centrifugal fan (3) rotated by the drive of the drive source (2) and the outer peripheral side of the centrifugal fan (3) while covering the outer periphery of the centrifugal fan (3), the scroll-shaped circumferential air passage (4a) ) And a downstream air passage (4b) continuous to the circumferential air passage (4a), and the circumferential air passage (4a) along the circumference of the centrifugal fan (3). A scroll casing (5) having a tongue (7) projecting from the most upstream part toward the most downstream part, and a flat plate-like heat radiating plate (6) is disposed in the air passage (4). In the blower (1),
The heat sink (6)
It is arranged along the tangent (L1) direction of the centrifugal fan (3), and one end (a1) of the heat radiating plate (6) is more in the blowing direction (A) than the diameter line (L2) of the tangent (L1). Upstream, and
A line (L3) connecting the outer periphery of the centrifugal fan (3) and the tongue (7) and an extension line (L4) of the heat radiating plate (6) intersect at the outlet side of the scroll casing (4). (B) and
The shortest distance (S1) from the outer periphery of the centrifugal fan (3), the shortest distance (S2) from the inner wall surface of the scroll casing (5), and the shortest distance (S3) from the outer wall surface of the scroll casing (5) And the centrifugal fan (3) and the tongue (7) are arranged at a position separated from the distance (S). 請求項１記載の送風機（１）であって、
前記放熱板（６）は、その端部（ａ２）が前記遠心ファン（３）の中心（Ｏ）と前記舌部（７）の先端とを結ぶ直線（Ｌ５）よりも送風方向（Ａ）の上流側に配置されたことを特徴とする送風機（１）。
The blower (1) according to claim 1, wherein
The heat radiating plate (6) has an end (a2) in the air blowing direction (A) rather than a straight line (L5) connecting the center (O) of the centrifugal fan (3) and the tip of the tongue (7). A blower (1) characterized by being arranged upstream.
JP2005099427A 2005-03-30 2005-03-30 Blower Withdrawn JP2006275024A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
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WO2011055594A1 (en) * 2009-11-09 2011-05-12 三菱重工業株式会社 Multiblade centrifugal fan and air conditioner using same
CN107532612A (en) * 2015-04-22 2018-01-02 三菱重工汽车空调系统株式会社 Cfentrifugal blower
CN109323437A (en) * 2018-11-19 2019-02-12 奥克斯空调股份有限公司 A kind of the air-flow adjustment structure and air conditioner in air duct
CN110594195A (en) * 2018-06-12 2019-12-20 日本电产株式会社 Air blower
WO2023103118A1 (en) * 2021-11-30 2023-06-15 Tcl空调器(中山)有限公司 Volute structure, air duct component, and air conditioner

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011055594A1 (en) * 2009-11-09 2011-05-12 三菱重工業株式会社 Multiblade centrifugal fan and air conditioner using same
US9011092B2 (en) 2009-11-09 2015-04-21 Mitsubishi Heavy Industries, Ltd. Multi-blade centrifugal fan and air conditioner employing the same
US9644631B2 (en) 2009-11-09 2017-05-09 Mitsubishi Heavy Industries, Ltd. Multi-blade centrifugal fan and air conditioner employing the same
EP2500582A4 (en) * 2009-11-09 2017-10-18 Mitsubishi Heavy Industries, Ltd. Multiblade centrifugal fan and air conditioner using same
CN107532612A (en) * 2015-04-22 2018-01-02 三菱重工汽车空调系统株式会社 Cfentrifugal blower
US10288085B2 (en) 2015-04-22 2019-05-14 Mitsubishi Heavy Industries Thermal Systems, Ltd. Centrifugal blower
CN107532612B (en) * 2015-04-22 2020-03-13 三菱重工制冷空调系统株式会社 Centrifugal blower
CN110594195A (en) * 2018-06-12 2019-12-20 日本电产株式会社 Air blower
CN109323437A (en) * 2018-11-19 2019-02-12 奥克斯空调股份有限公司 A kind of the air-flow adjustment structure and air conditioner in air duct
WO2023103118A1 (en) * 2021-11-30 2023-06-15 Tcl空调器(中山)有限公司 Volute structure, air duct component, and air conditioner

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