以下，針對實施形態之離心風扇1及空調裝置60，參照圖面等以做說明。而且，在包含圖1之以下圖面中，各構成構件之相對性尺寸之關係及形狀等，有時係與實際者不同。又，在以下之圖面中，賦予相同編號者，係相同或與此相當者，其係在專利說明書之全部中，當作共通。又，為了容易理解，雖然適宜使用表示方向之用語（例如「上」、「下」、「右」、「左」、「前」及「後」等），但是，這些表示僅係為了方便說明而如此地敘述，其並不用於侷限裝置或零件之配置及方向。Hereinafter, the centrifugal fan 1 and the air conditioner 60 according to the embodiment will be described with reference to the drawings and the like. In addition, in the following drawings including FIG. 1 , the relative dimensions, shapes, etc. of the constituent members may be different from the actual ones. In addition, in the following drawings, those assigned the same number are the same or equivalent, and they are considered to be common throughout the entire patent specification. In addition, for easy understanding, although terms indicating directions (such as "up", "down", "right", "left", "front" and "back", etc.) are used appropriately, these expressions are only for convenience of explanation However, as described, it is not intended to limit the arrangement and direction of devices or parts.
實施形態1.
［離心風扇1］
圖1係概示實施形態1之離心風扇1之立體圖。圖2係概示與旋轉軸RS平行地觀看實施形態1離心風扇1之構造之外觀圖。圖3係概示圖2所示之離心風扇1之A-A線剖面之剖面圖。使用圖1～圖3，說明離心風扇1之基本構造。離心風扇1係例如多葉片風扇，或者，渦輪風扇等之多葉片離心型之風扇，其具有產生氣流之葉輪2、及收納葉輪2於內部之渦卷殼4。離心風扇1係在葉輪2之虛擬之旋轉軸RS之軸向中，空氣自渦卷殼4的單側被吸入之單吸入型之風扇。Implementation form 1.
[Centrifugal fan 1]
Fig. 1 is a perspective view schematically showing a centrifugal fan 1 according to Embodiment 1. Fig. 2 is an external view schematically showing the structure of the centrifugal fan 1 according to Embodiment 1 viewed in parallel with the rotation axis RS. Fig. 3 is a cross-sectional view schematically showing the cross-section of the centrifugal fan 1 shown in Fig. 2 along line A-A. The basic structure of the centrifugal fan 1 is demonstrated using FIGS. 1-3. The centrifugal fan 1 is, for example, a multi-blade fan, or a multi-blade centrifugal fan such as a turbo fan, and has an impeller 2 for generating airflow and a scroll case 4 for accommodating the impeller 2 inside. The centrifugal fan 1 is a single-suction fan in which air is sucked from one side of the scroll case 4 in the axial direction of the imaginary rotating shaft RS of the impeller 2 .
（葉輪2）
葉輪2係離心式之風扇。葉輪2係被驅動裝置6旋轉驅動，藉由旋轉所產生之離心力，強制性地送出空氣往徑向外邊。葉輪2係藉驅動裝置6，往箭頭所示之旋轉方向R旋轉。驅動裝置6係例如馬達，賦予驅動力到葉輪2。如圖3所示，驅動裝置6係被配置於渦卷殼4內，但是，也可以驅動裝置6係被配置於渦卷殼4的外部，藉轉軸（圖示係省略）而與葉輪2的主板2a相連接。(impeller 2)
The impeller 2 is a centrifugal fan. The impeller 2 is driven to rotate by the driving device 6, and the centrifugal force generated by the rotation forces the air to be sent radially outward. The impeller 2 is rotated in the rotation direction R indicated by the arrow by the driving device 6 . The driving device 6 is, for example, a motor, and applies driving force to the impeller 2 . As shown in Figure 3, the driving device 6 is arranged in the scroll casing 4, but it is also possible that the driving device 6 is arranged outside the scroll casing 4, and is connected with the impeller 2 by a rotating shaft (not shown). The main board 2a is connected.
葉輪2係具有：主板2a，被驅動裝置6旋轉驅動；側板2c，呈環狀，與主板2a相向配置；以及複數扇葉2d，一端係被連接於主板2a，另一端係被連接於側板2c，排列於主板2a的周緣部2a1。The impeller 2 has: a main board 2a, which is rotationally driven by the driving device 6; a side plate 2c, which is annular and arranged opposite to the main board 2a; and a plurality of fan blades 2d, one end of which is connected to the main board 2a, and the other end is connected to the side plate 2c , are arranged on the peripheral portion 2a1 of the main board 2a.
主板2a係被連結於驅動裝置6之中心部2a2，係構成相對於被連結於複數扇葉2d之周緣部2a1而言，於旋轉軸RS之軸向中，往側板2c側，亦即，往吸入口2e側膨出之山形之剖面形狀。而且，驅動裝置6係被配置於由主板2a的膨出部分的內側面所形成之凹陷。而且，主板2a之形狀，係不侷限於具有山形之剖面形狀者。主板2a也可以係例如圓盤狀等，形成為板狀之構件。在主板2a的中心部2a2，係設有連接有驅動裝置6之軸部2b。主板2a係透過軸部2b，被驅動裝置6所旋轉驅動。The main board 2a is connected to the central part 2a2 of the driving device 6, and is configured to be toward the side plate 2c side in the axial direction of the rotation shaft RS, that is, toward The cross-sectional shape of a mountain-shaped bulge on the side of the suction port 2e. Furthermore, the drive unit 6 is disposed in a recess formed by the inner surface of the bulged portion of the main plate 2a. Moreover, the shape of the main board 2a is not limited to those having a mountain-shaped cross-section. The main board 2a may also be a member formed in a plate shape, such as a disc shape. At the central portion 2a2 of the main board 2a, a shaft portion 2b to which the driving device 6 is connected is provided. The main board 2a is rotationally driven by the driving device 6 through the shaft portion 2b.
又，葉輪2係具有在旋轉軸RS之軸向中，被安裝於複數扇葉2d的主板2a的相反側的端部之環狀側板2c。側板2c係藉連結複數扇葉2d，維持各扇葉2d的尖端之位置關係，而且，補強複數扇葉2d。Moreover, the impeller 2 has the annular side plate 2c attached to the end part of the blade 2d on the opposite side to the main plate 2a in the axial direction of the rotation shaft RS. The side plate 2c maintains the positional relationship of the tip ends of each fan blade 2d by connecting the plurality of fan blades 2d, and reinforces the plurality of fan blades 2d.
各複數扇葉2d係一端被連接於主板2a，另一端被連接於側板2c，排列於將主板2a之虛擬之旋轉軸RS當作中心之圓周方向。各複數扇葉2d係被配置於主板2a與側板2c之間。各扇葉2d係在主板2a的周緣部2a1中，彼此隔開一定間隔被配置。Each plurality of fan blades 2d is connected at one end to the main board 2a and at the other end to the side board 2c, and is arranged in a circumferential direction centering on the virtual rotation axis RS of the main board 2a. Each plurality of fan blades 2d is arranged between the main board 2a and the side board 2c. The respective blades 2d are attached to the peripheral portion 2a1 of the main plate 2a, and are arranged at a predetermined interval from each other.
如圖1及圖3所示，葉輪2係藉被配置於主板2a之複數扇葉2d，構成為筒狀。而且，葉輪2係在旋轉軸RS之軸向中，於主板2a的相反側的側板2c側，形成有用於流入氣體到由主板2a與複數扇葉2d所圍成之空間47之吸入口2e。As shown in FIGS. 1 and 3 , the impeller 2 is formed in a cylindrical shape by a plurality of blades 2 d disposed on the main plate 2 a. Moreover, the impeller 2 is formed in the axial direction of the rotating shaft RS, on the side plate 2c side opposite to the main plate 2a, for inflowing gas into the space 47 surrounded by the main plate 2a and the plurality of fan blades 2d. Suction port 2e is formed.
葉輪2係藉驅動裝置6驅動，以旋轉軸RS為中心被旋轉驅動。藉葉輪2旋轉，離心風扇1的外部的氣體，係通過被形成於渦卷殼4之吸入口5及葉輪2的吸入口2e，被吸入由主板2a與複數扇葉2d所圍成之空間47。而且，藉葉輪2旋轉，被吸入由主板2a與複數扇葉2d所圍成之空間47之空氣，係通過隣接之扇葉2d們間之空間，被送出到葉輪2的徑向外邊。The impeller 2 is driven by the driving device 6, and is rotationally driven about the rotating shaft RS. By the rotation of the impeller 2, the air outside the centrifugal fan 1 is sucked into the space 47 surrounded by the main board 2a and the plurality of fan blades 2d through the suction port 5 formed in the scroll casing 4 and the suction port 2e of the impeller 2 . And, by the rotation of the impeller 2, the air sucked into the space 47 surrounded by the main board 2a and the plurality of fan blades 2d is sent out to the radial outside of the impeller 2 through the space between the adjacent fan blades 2d.
（渦卷殼4）
如圖1～圖3所示，渦卷殼4係收納葉輪2於內部，整流自葉輪2被吹出之空氣。渦卷殼4係由發泡苯乙烯等之發泡材所形成。而且，渦卷殼4係不侷限於由發泡材所形成者。例如渦卷殼4也可以由樹脂材料所形成，或由金屬材料所形成。渦卷殼4係具有渦卷部41及吐出部42。(scroll shell 4)
As shown in FIGS. 1 to 3 , the scroll casing 4 houses the impeller 2 inside, and rectifies the air blown out from the impeller 2 . The scroll casing 4 is formed of a foam material such as foamed styrene. Furthermore, the scroll casing 4 is not limited to being formed of a foam material. For example, the scroll casing 4 may also be formed of a resin material or a metal material. The scroll casing 4 has a scroll portion 41 and a discharge portion 42 .
（渦卷部41）
渦卷部41係形成轉換葉輪2所產生之氣流之動壓為靜壓之風路。渦卷部41係具有：側壁4a，自旋轉軸RS的軸向覆蓋葉輪2，形成取入空氣之吸入口5；以及周壁4c，自旋轉軸RS之徑向包圍葉輪2。又，渦卷部41係具有使葉輪2所產生之氣流，透過渦卷部41導引到吐出口42a之舌部43。而且，所謂旋轉軸RS之徑向，係指相對於旋轉軸RS之軸向而言垂直之方向。由周壁4c及側壁4a所構成之渦卷部41的內部空間45，係成為自葉輪2被吹出之空氣，沿著周壁4c流動之空間。(Scroll 41)
The scroll portion 41 forms an air path that converts the dynamic pressure of the airflow generated by the impeller 2 into a static pressure. The scroll portion 41 has: a side wall 4a covering the impeller 2 in the axial direction from the rotating shaft RS to form a suction port 5 for taking in air; and a peripheral wall 4c surrounding the impeller 2 in the radial direction from the rotating shaft RS. Further, the scroll portion 41 has a tongue portion 43 that guides the airflow generated by the impeller 2 through the scroll portion 41 to the discharge port 42a. In addition, the radial direction of the rotating shaft RS refers to a direction perpendicular to the axial direction of the rotating shaft RS. The inner space 45 of the scroll portion 41 constituted by the peripheral wall 4c and the side wall 4a is a space where the air blown from the impeller 2 flows along the peripheral wall 4c.
（側壁4a）
如圖1及圖3所示，側壁4a係在係在葉輪2的旋轉軸RS之軸向中，被配置於葉輪2之兩側。如圖3所示，渦卷殼4係側壁4a有第1側壁4a1及第2側壁4a2。(side wall 4a)
As shown in FIGS. 1 and 3 , the side walls 4 a are arranged on both sides of the impeller 2 in the axial direction of the rotation shaft RS of the impeller 2 . As shown in FIG. 3, the side wall 4a of the scroll casing 4 has a first side wall 4a1 and a second side wall 4a2.
第1側壁4a1係沿著旋轉軸RS之軸向中之周壁4c的一邊之第1端部4c11形成。如圖1及圖3所示，第1側壁4a1係在葉輪2的旋轉軸RS之軸向中之主板2a側與側板2c側中，被形成於葉輪2的側板2c側。在第1側壁4a1形成有用於取入空氣之吸入口5，使得空氣可流通於葉輪2與渦卷殼4的外部之間。吸入口5係被形成為圓形，葉輪2係被配置為吸入口5的中心與葉輪2的軸部2b的中心係大概一致。而且，吸入口5之形狀，並不侷限於圓形，其也可以係例如橢圓形等之其他形狀。The first side wall 4a1 is formed along the first end portion 4c11 of one side of the peripheral wall 4c in the axial direction of the rotation shaft RS. As shown in FIGS. 1 and 3 , the first side wall 4a1 is formed on the side of the side plate 2c of the impeller 2 between the side of the main plate 2a and the side of the side plate 2c in the axial direction of the rotation shaft RS of the impeller 2 . A suction port 5 for taking in air is formed on the first side wall 4 a 1 so that air can flow between the impeller 2 and the outside of the scroll case 4 . The suction port 5 is formed in a circular shape, and the impeller 2 is arranged such that the center of the suction port 5 substantially coincides with the center of the shaft portion 2 b of the impeller 2 . Moreover, the shape of the suction port 5 is not limited to a circle, and it can also be other shapes such as oval.
第2側壁4a2係沿著旋轉軸RS的軸向中之周壁4c的另一邊之第2端部4c12形成。如圖1及圖3所示，第2側壁4a2係在葉輪2的旋轉軸RS的軸向中之主板2a側與側板2c側中，被形成於葉輪2的主板2a側。第2側壁4a2係被形成，使得在旋轉軸RS的軸向中，覆蓋葉輪2。第2側壁4a2係被形成為板狀，在第2側壁4a2係未形成有空氣之吸入口5。離心風扇1的渦卷殼4，係在葉輪2的旋轉軸RS之軸向中，於主板2a的單側，具有形成有吸入口5之側壁4a之單吸入型之殼體。The second side wall 4a2 is formed along the second end portion 4c12 of the other side of the peripheral wall 4c in the axial direction of the rotation shaft RS. As shown in FIGS. 1 and 3 , the second side wall 4a2 is formed on the main plate 2a side of the impeller 2 between the main plate 2a side and the side plate 2c side in the axial direction of the rotation shaft RS of the impeller 2 . The second side wall 4a2 is formed so as to cover the impeller 2 in the axial direction of the rotary shaft RS. The 2nd side wall 4a2 is formed in plate shape, and the suction port 5 of air is not formed in the 2nd side wall 4a2. The scroll casing 4 of the centrifugal fan 1 is in the axial direction of the rotating shaft RS of the impeller 2, and has a single suction type casing with a side wall 4a of the suction port 5 formed on one side of the main board 2a.
第1側壁4a1係具有形成與由主板2a與複數扇葉2d所形成之空間47相連通之吸入口5之喇叭口3。被設於第1側壁4a1之吸入口5，如圖1及圖3所示，係由喇叭口3所形成。喇叭口3係整流被葉輪2吸入之氣體，以流入到葉輪2的吸入口2e。The first side wall 4a1 has the bell mouth 3 forming the suction port 5 communicating with the space 47 formed by the main board 2a and the plurality of fan blades 2d. The suction port 5 provided on the first side wall 4a1 is formed by the bell mouth 3 as shown in FIGS. 1 and 3 . The bell mouth 3 rectifies the gas sucked by the impeller 2 to flow into the suction port 2e of the impeller 2 .
如圖3所示，喇叭口3係被形成，使得開口直徑自渦卷殼4的外部往內部，逐漸變小。藉第1側壁4a1的該構造，吸入口5附近的空氣係沿著喇叭口3以滑順地流動，效率良好地自吸入口5往葉輪2流入。As shown in FIG. 3 , the bell mouth 3 is formed such that the diameter of the opening gradually decreases from the outside of the scroll casing 4 to the inside. With this structure of the first side wall 4a1, the air near the suction port 5 flows smoothly along the bell mouth 3, and flows into the impeller 2 from the suction port 5 efficiently.
喇叭口3係在葉輪2之徑向中，須要既定之長度。喇叭口3係當在葉輪2之徑向中，沒有既定之長度時，喇叭口3之曲率變大，沿著喇叭口3流動之氣流有剝離之虞。喇叭口3係在葉輪2之徑向中，須要既定之長度，所以，渦卷殼4係在喇叭口3的內側形成空間46。此空間46係有成為自葉輪2流出之氣流，再流入到葉輪2時所通過之空間之虞。The bell mouth 3 is in the radial direction of the impeller 2 and needs a predetermined length. The bell mouth 3 means that when there is no predetermined length in the radial direction of the impeller 2, the curvature of the bell mouth 3 becomes large, and the airflow flowing along the bell mouth 3 may be peeled off. The bell mouth 3 is tied in the radial direction of the impeller 2 and needs a predetermined length, so the scroll casing 4 is tied inside the bell mouth 3 to form a space 46 . This space 46 may become a space through which the airflow flowing out from the impeller 2 flows into the impeller 2 again.
喇叭口3係具有：喇叭口周壁31，自第1側壁4a1突出，被形成為筒狀；以及空氣取入部32，被形成為環狀，開口直徑係往渦卷殼4的內部，逐漸變小。被形成為環狀之空氣取入部32，係形成外周側的緣部之外周緣部32a，與喇叭口周壁31之突出方向之端部連續，形成內周側的緣部之內周緣部32b係形成吸入口5。需特別說明的是，從圖3、4、6至10、13至18等可看出，側板2c係被收容於喇叭口3內，在葉輪2之徑向中配置於與喇叭口周壁31相向的位置。
The bell mouth 3 has: the bell mouth peripheral wall 31 protruding from the first side wall 4a1 and formed in a cylindrical shape; and the air intake part 32 formed in a ring shape, and the opening diameter is gradually reduced toward the inside of the scroll casing 4 . The ring-shaped air intake portion 32 forms an outer peripheral edge portion 32a on the outer peripheral side, which is continuous with the end portion in the protruding direction of the bell mouth peripheral wall 31, and forms an inner peripheral edge portion 32b on the inner peripheral side. A suction port 5 is formed. It should be noted that, as can be seen from Figures 3, 4, 6 to 10, 13 to 18, etc., the side plate 2c is accommodated in the bell mouth 3, and is arranged in the radial direction of the impeller 2 to face the bell mouth peripheral wall 31 s position.
(周壁4c)
(surrounding wall 4c)
周壁4c係被設於彼此相向之側壁4a間之壁體，在葉輪2之旋轉方向R中，構成彎曲面。周壁4c係使葉輪2所產生之氣流，沿著彎曲之壁面，透過渦卷部41而導引到吐出口42a。周壁4c係例如被配置為與葉輪2的旋轉軸RS之軸向平行，以覆蓋葉輪2。而且，周壁4c也可以係相對於葉輪2的旋轉軸RS之軸向而言傾斜之形態，其並不侷限於被配置成與旋轉軸RS之軸向平行之形態。周壁4c係相對於旋轉軸RS而言，自徑向覆蓋葉輪2，構成與複數扇葉2d相向之內周面。周壁4c係與葉輪2的扇葉2d之空氣之吹出側相向。
The peripheral wall 4c is a wall body provided between the side walls 4a facing each other, and forms a curved surface in the rotation direction R of the impeller 2 . The surrounding wall 4c guides the airflow generated by the impeller 2 to the discharge port 42a through the scroll portion 41 along the curved wall surface. The peripheral wall 4c is arranged, for example, parallel to the axial direction of the rotation shaft RS of the impeller 2 so as to cover the impeller 2 . Furthermore, the peripheral wall 4c may be inclined with respect to the axial direction of the rotating shaft RS of the impeller 2, and is not limited to being arranged parallel to the axial direction of the rotating shaft RS. The peripheral wall 4c covers the impeller 2 from the radial direction with respect to the rotation axis RS, and constitutes an inner peripheral surface facing the plurality of blades 2d. The peripheral wall 4c faces the air blowing side of the blade 2d of the impeller 2 .
如圖2所示，周壁4c係被設於自位於與舌部43之邊界之渦卷開始部41s，沿著葉輪2之旋轉方向R，至位於自舌部43遠離之側之吐出部42與渦卷部41之邊界之渦卷結束部41b。渦卷開始部41s係在構成彎曲面之周壁4c中，由葉輪2之旋轉所產生之氣流的上游側的端部，渦卷結束部41b係由葉輪2之旋轉所產生之氣流的下游側的端部。
As shown in FIG. 2, the peripheral wall 4c is provided from the scroll start portion 41s at the boundary with the tongue portion 43, along the rotation direction R of the impeller 2, to the ejection portion 42 and the outlet portion 42 on the side away from the tongue portion 43. The scroll end portion 41b at the boundary of the scroll portion 41 . The scroll start portion 41s is the end portion on the upstream side of the airflow generated by the rotation of the impeller 2 in the peripheral wall 4c constituting the curved surface, and the scroll end portion 41b is the end portion on the downstream side of the airflow generated by the rotation of the impeller 2. Ends.
周壁4c係於旋轉方向R，被形成為渦卷形狀。渦卷形狀有例如對數螺旋、阿基米德螺旋、或依據漸開曲線等之渦卷形狀。周壁4c的內周面，係構成自成為渦卷形狀之渦卷開始之渦卷開始部41s，至成為渦卷形狀之渦卷結束之渦卷結束部41b，沿著葉輪2之圓周方向滑順地彎曲之曲面。藉這種構造，自葉輪2被送出之空氣，係往吐出部42之方向，滑順地流過葉輪2與周壁4c間之內部空間45。因此，在渦卷殼4內，係空氣之靜壓自舌部43往吐出部42，效率良好地上昇。
The peripheral wall 4c is formed in a scroll shape with respect to the rotation direction R. As shown in FIG. The scroll shape includes, for example, a logarithmic spiral, an Archimedes spiral, or a scroll shape based on an involute curve. The inner peripheral surface of the peripheral wall 4c is formed from the scroll start portion 41s at the beginning of the scroll shape to the scroll end portion 41b at the end of the scroll shape, and is smooth along the circumferential direction of the impeller 2. curved surface. With this structure, the air sent from the impeller 2 flows smoothly through the internal space 45 between the impeller 2 and the peripheral wall 4c in the direction of the discharge portion 42 . Therefore, in the scroll casing 4 , the static pressure of the air is efficiently increased from the tongue portion 43 to the discharge portion 42 .
(吐出部42)
(discharge unit 42)
吐出部42係形成葉輪2所產生以通過渦卷部41之氣流被吐出之吐出口42a。吐出部42係由與沿著周壁4c流動之空氣之流動方向直交之剖面，成為矩形之中空管所構成。而且，吐出部42之剖面形狀，係並不侷限於矩形。吐出部42係形成導引自葉輪2被送出，以流動在周壁4c與葉輪2間之內部空間45之空氣，往渦卷殼4的外部排出之流路。The discharge part 42 forms the discharge port 42a which discharges the airflow which the impeller 2 generate|occur|produced and passed the scroll part 41. The discharge portion 42 is formed of a rectangular hollow tube with a section perpendicular to the flow direction of the air flowing along the peripheral wall 4c. Moreover, the cross-sectional shape of the discharge part 42 is not limited to a rectangle. The discharge part 42 forms a flow path that guides the air sent out from the impeller 2 to flow in the inner space 45 between the peripheral wall 4 c and the impeller 2 to the outside of the scroll casing 4 .
如圖1所示，吐出部42係具有延長板42b、擴散板42c、第1側壁4a1及第2側壁4a2。延長板42b係被形成為自周壁4c的渦卷結束部41b延伸，其係與周壁4c一體形成之板狀之部分。擴散板42c係與渦卷殼4的舌部43一體形成，其係與延長板42b相向配置之板狀之部分。擴散板42c係被形成為與延長板42b之間，具有既定之角度，使得流路之剖面積係沿著吐出部42內之空氣之流動方向逐漸擴大。As shown in FIG. 1, the discharge part 42 has the extension plate 42b, the diffuser plate 42c, the 1st side wall 4a1, and the 2nd side wall 4a2. The extension plate 42b is formed to extend from the scroll end portion 41b of the peripheral wall 4c, and is a plate-shaped portion integrally formed with the peripheral wall 4c. The diffuser plate 42c is formed integrally with the tongue portion 43 of the scroll case 4, and is a plate-shaped portion arranged to face the extension plate 42b. The diffuser plate 42c is formed to have a predetermined angle with the extension plate 42b so that the cross-sectional area of the flow path gradually expands along the flow direction of the air in the discharge portion 42 .
延長板42b與擴散板42c，係被形成於第1側壁4a1與第2側壁4a2之間。如此一來，吐出部42係藉延長板42b、擴散板42c、第1側壁4a1及第2側壁4a2，形成為剖面矩形之流路。The extension plate 42b and the diffusion plate 42c are formed between the first side wall 4a1 and the second side wall 4a2. In this way, the discharge portion 42 is formed into a flow path having a rectangular cross section by the extension plate 42b, the diffuser plate 42c, the first side wall 4a1, and the second side wall 4a2.
（舌部43）
在渦卷殼4中，係於吐出部42的擴散板42c，與周壁4c的渦卷開始部41s之間，形成有舌部43。舌部43係以既定之曲率半徑形成，周壁4c係透過舌部43，與擴散板42c滑順地連接。(tongue 43)
In the scroll case 4, a tongue portion 43 is formed between the diffuser plate 42c of the discharge portion 42 and the scroll start portion 41s of the peripheral wall 4c. The tongue portion 43 is formed with a predetermined radius of curvature, and the peripheral wall 4c passes through the tongue portion 43 to be smoothly connected to the diffuser plate 42c.
舌部43係抑制自被形成於渦卷殼4之渦卷狀流路的渦卷結束點往渦卷開始點流入空氣。舌部43係被設於通風路徑的上游部，具有分流空氣往葉輪2之旋轉方向R流動、及自通風路徑的下游部往吐出口42a之吐出方向流動之角色。又，流入到吐出部42之氣流，係在通過渦卷殼4時，靜壓上昇，成為壓力大於渦卷殼4內。因此，舌部43係具有分隔這種壓力差之功能。The tongue portion 43 suppresses the inflow of air from the scroll end point to the scroll start point of the scroll-shaped flow path formed in the scroll housing 4 . The tongue 43 is provided at the upstream part of the ventilation path, and has the role of diverting the air to flow in the direction of rotation R of the impeller 2, and to flow from the downstream part of the ventilation path to the discharge direction of the discharge port 42a. Moreover, when the airflow flowing into the discharge part 42 passes through the scroll casing 4, the static pressure increases, and the pressure becomes higher than that in the scroll casing 4. Therefore, the tongue 43 has the function of separating this pressure difference.
（遮壁部20）
圖4係圖3所示之離心風扇1的範圍AR之放大圖。使用圖2～圖4，說明遮壁部20。而且，圖2係為了說明遮壁部20的構造，透視喇叭口3以概示被配置於喇叭口3內側之遮壁部20。(shield part 20)
FIG. 4 is an enlarged view of the range AR of the centrifugal fan 1 shown in FIG. 3 . The shielding wall portion 20 will be described using FIGS. 2 to 4 . Moreover, FIG. 2 is for explaining the structure of the shielding wall portion 20 , and the bell mouth 3 is seen through to schematically show the shielding wall portion 20 arranged inside the bell mouth 3 .
如圖3及圖4所示，渦卷殼4係在葉輪2之徑向中，具有被設於喇叭口周壁31與內周緣部32b之間，自側壁4a往葉輪2側延伸之遮壁部20。遮壁部20係阻止自葉輪2流出之氣流，往再流入到葉輪2之方向流動者。亦即，遮壁部20係妨礙自葉輪2流出之氣流，通過空間46者。As shown in Figures 3 and 4, the scroll casing 4 is located in the radial direction of the impeller 2, and has a shielding wall portion that is arranged between the bell mouth peripheral wall 31 and the inner peripheral edge portion 32b and extends from the side wall 4a to the impeller 2 side. 20. The shielding wall portion 20 prevents the air flow flowing out from the impeller 2 from flowing in the direction of reflowing into the impeller 2 . That is, the shielding wall portion 20 prevents the airflow flowing out from the impeller 2 from passing through the space 46 .
遮壁部20係在與旋轉軸RS之軸向平行地觀看之俯視中，位於喇叭口周壁31與內周緣部32b之間。亦即，遮壁部20係在與旋轉軸RS之軸向平行地觀看之俯視中，不位於比內周緣部32b還要靠近旋轉軸RS軸側之位置。The shielding wall portion 20 is located between the bell mouth peripheral wall 31 and the inner peripheral edge portion 32b in a plan view viewed parallel to the axial direction of the rotation shaft RS. That is, the shielding wall portion 20 is not located closer to the axial side of the rotational shaft RS than the inner peripheral edge portion 32b in a plan view viewed parallel to the axial direction of the rotational shaft RS.
如圖2所示，遮壁部20係在與旋轉軸RS之軸向平行之方向上觀看之俯視中，被形成為圓環狀。而且，遮壁部20係在與旋轉軸RS之軸向平行之方向上觀看之俯視中，並不侷限於被形成為圓環狀，其也可以被形成為圓弧狀。As shown in FIG. 2 , the shielding wall portion 20 is formed in an annular shape in a plan view viewed in a direction parallel to the axial direction of the rotation shaft RS. Furthermore, the shielding wall portion 20 is not limited to being formed in an annular shape in a plan view viewed in a direction parallel to the axial direction of the rotation shaft RS, and may be formed in an arcuate shape.
在此，於葉輪2之徑向中，將喇叭口周壁31與形成遮壁部20的內周側的緣部之尖端部20a間之距離，定義為距離DR。距離DR係在將旋轉軸RS當作中心之圓周方向中，長度可為一定，長度也可以改變。亦即，在將旋轉軸RS當作中心之圓周方向中，因為量測之地點而距離DR之長度，可以形成為總是相同長度，或者，因為量測之地點而距離DR之長度，被形成為不同長度。而且，相同之長度係包含完全相同之長度，及概略相同之長度。Here, in the radial direction of the impeller 2 , the distance between the bell mouth peripheral wall 31 and the tip portion 20 a forming the edge portion on the inner peripheral side of the shielding wall portion 20 is defined as a distance DR. The distance DR is in the circumferential direction with the rotation axis RS as the center, and the length may be constant or variable. That is, in the circumferential direction with the rotation axis RS as the center, the length of the distance DR due to the point of measurement may be formed to always be the same length, or the length of the distance DR due to the point of measurement may be formed for different lengths. Also, the same length includes exactly the same length and approximately the same length.
如圖3及圖4所示，遮壁部20係在沿著旋轉軸RS之剖面中，被形成為板狀。而且，遮壁部20並不侷限於被形成為板狀之構造。例如遮壁部20也可以在沿著旋轉軸RS之剖面中，被形成為在旋轉軸RS之軸向中，具有厚度之塊狀。As shown in FIGS. 3 and 4 , the shielding wall portion 20 is formed in a plate shape in a cross section along the rotation axis RS. Moreover, the shielding wall part 20 is not limited to the structure formed in plate shape. For example, the shielding portion 20 may be formed in a block shape having a thickness in the axial direction of the rotational axis RS in a cross section along the rotational axis RS.
如圖3及圖4所示，遮壁部20係被形成為板狀，被形成為往相對於旋轉軸RS而言，垂直之方向上延伸。而且，遮壁部20之延伸方向，並不侷限於在相對於旋轉軸RS而言，垂直之方向，其也可以係相對於與旋轉軸RS垂直之方向而言傾斜之方向。亦即，遮壁部20係也可以在沿著旋轉軸RS之剖面中，相對於與旋轉軸RS垂直之方向而言，被形成為傾斜之形狀。但是，遮壁部20係不包含在相對於第1側壁4a1而言，喇叭口3的形成側的相反側中，被形成為在與旋轉軸RS平行之方向上延伸之形狀。As shown in FIGS. 3 and 4 , the shielding wall portion 20 is formed in a plate shape and is formed to extend in a direction perpendicular to the rotation axis RS. Moreover, the extending direction of the shielding wall portion 20 is not limited to a direction perpendicular to the rotation axis RS, and may also be an inclined direction relative to the direction perpendicular to the rotation axis RS. That is, the shielding wall part 20 may be formed in the shape inclined with respect to the direction perpendicular to the rotation axis RS in the cross section along the rotation axis RS. However, the shielding wall portion 20 is not included in the first side wall 4a1 on the side opposite to the side where the bell mouth 3 is formed, and is formed in a shape extending in a direction parallel to the rotation axis RS.
如圖3及圖4所示，遮壁部20係在主板2a的旋轉軸RS之軸向中，被設於比成為側板2c的主板2a側的端部之主板側端部2c1，還要靠近外周緣部32a側。亦即，遮壁部20係在與主板2a的旋轉軸RS之軸向平行之方向中，被形成於主板側端部2c1之位置與外周緣部32a之位置之間。As shown in FIG. 3 and FIG. 4 , the shielding wall portion 20 is arranged in the axial direction of the rotation axis RS of the main board 2a, and is arranged closer to the main board side end 2c1 that becomes the end of the main board 2a side of the side plate 2c. The outer peripheral edge part 32a side. That is, the shielding wall portion 20 is formed between the position of the main plate side end portion 2c1 and the position of the outer peripheral edge portion 32a in a direction parallel to the axial direction of the rotation axis RS of the main plate 2a.
遮壁部20係在葉輪2之徑向中，與側板2c相向。例如如圖3及圖4所示，遮壁部20係被形成為板狀，其被形成為形成遮壁部20的內周側的緣部之尖端部20a與側板2c，係在葉輪2之徑向中相向。The shielding wall portion 20 is located in the radial direction of the impeller 2 and faces the side plate 2c. For example, as shown in FIG. 3 and FIG. 4 , the shielding wall portion 20 is formed in a plate shape, and it is formed to form the tip portion 20a and the side plate 2c of the edge portion on the inner peripheral side of the shielding wall portion 20, and is fastened between the impeller 2. facing each other radially.
在此，於葉輪2之徑向中，將遮壁部20與側板2c間之距離，當作距離D1。更詳細地說來，係於葉輪2之徑向中，將遮壁部20的尖端部20a與側板2c間之距離，當作距離D1。距離D1係被形成為小於周壁4c與側板2c間之距離。而且，距離D1係被形成為小於喇叭口周壁31與側板2c間之距離。Here, in the radial direction of the impeller 2, the distance between the shielding wall portion 20 and the side plate 2c is defined as a distance D1. More specifically, the distance between the tip portion 20a of the shielding wall portion 20 and the side plate 2c in the radial direction of the impeller 2 is defined as the distance D1. The distance D1 is formed to be smaller than the distance between the peripheral wall 4c and the side plate 2c. Also, the distance D1 is formed to be smaller than the distance between the bell mouth peripheral wall 31 and the side plate 2c.
在實施形態1中，渦卷殼4係在沿著旋轉軸RS之剖面中，具有自喇叭口周壁31往側板2c延伸之遮壁部20。而且，與喇叭口周壁31的第1側壁4a1側的端部與葉輪2的側板2c之位置關係無關地，尖端部20a與側板2c間之距離D1，係被構成為小於周壁4c與側板2c之距離及喇叭口周壁31與側板2c之距離。In Embodiment 1, the scroll casing 4 has the shielding wall portion 20 extending from the bell mouth peripheral wall 31 to the side plate 2c in a cross section along the rotation axis RS. Moreover, regardless of the positional relationship between the end of the first side wall 4a1 side of the bell mouth peripheral wall 31 and the side plate 2c of the impeller 2, the distance D1 between the tip portion 20a and the side plate 2c is configured to be smaller than the distance between the peripheral wall 4c and the side plate 2c. distance and the distance between the bell mouth peripheral wall 31 and the side plate 2c.
圖5係表示遮壁部20的尖端部20a一例之放大圖。尖端部20a係具有主板2a側的壁面形成傾斜面之傾斜部20a1，其被形成為愈往尖端，則厚度變得愈薄。而且，尖端部20a並不侷限於具有傾斜部20a1，其也可以不具有傾斜部20a1。FIG. 5 is an enlarged view showing an example of the tip portion 20 a of the shielding wall portion 20 . The tip portion 20a has an inclined portion 20a1 in which the wall surface on the side of the main plate 2a forms an inclined surface, and is formed so as to become thinner toward the tip. Moreover, the tip portion 20a is not limited to having the inclined portion 20a1, and may not have the inclined portion 20a1.
圖6係表示遮壁部20之第1例之放大示意圖。如圖6所示，當遮壁部20係與第1側壁4a1一體形成時，遮壁部20係自第1側壁4a1突出。如圖6所示，遮壁部20可以具有落差部20b。落差部20b係自第1側壁4a1突出以形成為圓筒狀。落差部20b係在葉輪2之徑向中，與喇叭口周壁31相向。遮壁部20係具有落差部20b，藉此，於旋轉軸RS之軸向中，尖端部20a之形成位置與第1側壁4a1之形成位置係不同。亦即，構成氣流之流路之壁體之遮監部20的壁面，與構成氣流之流路側之壁體之第1側壁4a1的壁面，係形成有落差。FIG. 6 is an enlarged schematic view showing a first example of the shielding portion 20 . As shown in FIG. 6, when the shielding wall portion 20 is integrally formed with the first side wall 4a1, the shielding wall portion 20 protrudes from the first side wall 4a1. As shown in FIG. 6, the shielding wall part 20 may have the step part 20b. The step part 20b protrudes from the 1st side wall 4a1, and is formed in cylindrical shape. The drop portion 20b is located in the radial direction of the impeller 2 and faces the peripheral wall 31 of the bell mouth. The shielding wall portion 20 has a step portion 20b, whereby the formation position of the tip portion 20a is different from the formation position of the first side wall 4a1 in the axial direction of the rotation shaft RS. That is, there is a height difference between the wall surface of the shielding portion 20 constituting the wall of the flow path of the air flow and the wall surface of the first side wall 4a1 of the wall constituting the flow path of the air flow.
遮壁部20的落差部20b係與喇叭口周壁31相抵接，遮壁部20係在葉輪2之徑向中，自喇叭口周壁31往內周緣部32b延伸。亦即，遮壁部20的外周緣部側係與第1側壁4a1一體形成，遮壁部20係在葉輪2之徑向中，自喇叭口周壁31側往內周緣部32b側延伸。而且，遮壁部20的落差部20b，係只要與喇叭口周壁31相向即可，其也可以不與喇叭口周壁31相抵接。The drop portion 20b of the shielding wall portion 20 is in contact with the bell mouth peripheral wall 31 , and the shield wall portion 20 is located in the radial direction of the impeller 2 and extends from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b. That is, the outer peripheral edge side of the shielding wall portion 20 is integrally formed with the first side wall 4a1, and the shielding wall portion 20 extends from the bell mouth peripheral wall 31 side to the inner peripheral edge portion 32b side in the radial direction of the impeller 2 . Furthermore, the step portion 20 b of the shielding wall portion 20 only needs to face the bell mouth peripheral wall 31 , and does not need to be in contact with the bell mouth peripheral wall 31 .
圖7係表示遮壁部20之第2例之放大示意圖。如圖7所示，當遮壁部20係與第1側壁4a1一體形成時，遮壁部20係也可以被形成為在沿著旋轉軸RS之剖面中，自第1側壁4a1往葉輪2一直線地延伸。換言之，構成氣流之流路側之壁體之遮壁部20的壁面，與構成氣流之流路側之壁體之第1側壁4a1的壁面，也可以形成相同平面。而且，在圖7中，在沿著旋轉軸RS之剖面中，雖然敘述第1側壁4a1之厚度與遮壁部20之厚度係相等，但是，第1側壁4a1之厚度與遮壁部20之厚度，可以係相等厚度，或者，也可以係不同厚度。FIG. 7 is an enlarged schematic view showing a second example of the shielding portion 20 . As shown in FIG. 7, when the shielding wall portion 20 is integrally formed with the first side wall 4a1, the shielding wall portion 20 may also be formed so that a straight line extends from the first side wall 4a1 to the impeller 2 in a section along the rotation axis RS. extended. In other words, the wall surface of the shielding wall portion 20 constituting the wall on the flow path side of the air flow may be formed in the same plane as the wall surface of the first side wall 4a1 constituting the wall body on the flow path side of the air flow. Moreover, in FIG. 7, in a section along the rotation axis RS, although the thickness of the first side wall 4a1 is described as being equal to the thickness of the shielding wall portion 20, the thickness of the first side wall 4a1 is equal to the thickness of the shielding wall portion 20. , can be of equal thickness, or, can also be of different thickness.
圖8係表示遮壁部20之第3例之放大示意圖。如圖8所示，當遮壁部20係與第1側壁4a1一體形成時，遮壁部20也可以被形成為在沿著旋轉軸RS之剖面中，自第1側壁4a1往葉輪2延伸。而且，如圖8所示，遮壁部20也可以在第1側壁4a1與尖端部20a之間，具有斜面部20c。斜面部20c係自第1側壁4a1突出，以形成圓錐座之側面形狀。斜面部20c係在沿著旋轉軸RS之剖面中，形成相對於旋轉軸RS之軸向而言傾斜之斜面。遮壁部20係具有斜面部20c，藉此，在旋轉軸RS之軸向中，尖端部20a之形成位置與第1側壁4a1之形成位置係不同。亦即，構成氣流之流路之壁體之遮壁部20的壁面，與構成氣流之流路側之壁體之第1側壁4a1的壁面，係形成有落差。FIG. 8 is an enlarged schematic view showing a third example of the shielding portion 20 . As shown in FIG. 8, when the shielding portion 20 is formed integrally with the first side wall 4a1, the shielding portion 20 may also be formed to extend from the first sidewall 4a1 to the impeller 2 in a section along the rotation axis RS. Furthermore, as shown in FIG. 8, the shielding wall portion 20 may have a slope portion 20c between the first side wall 4a1 and the tip portion 20a. The inclined portion 20c protrudes from the first side wall 4a1 to form the side shape of the conical seat. The slope portion 20c forms a slope inclined with respect to the axial direction of the rotation shaft RS in a cross section along the rotation shaft RS. The shielding part 20 has the slope part 20c, and by this, the formation position of the tip part 20a and the formation position of the 1st side wall 4a1 are different in the axial direction of the rotation axis RS. That is, there is a height difference between the wall surface of the shielding wall portion 20 constituting the wall of the flow path of the air flow and the wall surface of the first side wall 4a1 of the wall constituting the flow path side of the air flow.
圖9係表示遮壁部20之第4例之放大示意圖。如圖6～圖8所示，遮壁部20係與第1側壁4a1一體形成。而且，遮壁部20係不侷限於與第1側壁4a1一體形成之構造。例如如圖9所示，遮壁部20也可以係與喇叭口周壁31一體形成。FIG. 9 is an enlarged schematic view showing a fourth example of the shielding wall portion 20 . As shown in FIGS. 6 to 8 , the shielding wall portion 20 is integrally formed with the first side wall 4a1. Moreover, the shielding wall part 20 is not limited to the structure formed integrally with the 1st side wall 4a1. For example, as shown in FIG. 9 , the shielding wall portion 20 may be integrally formed with the bell mouth peripheral wall 31 .
如圖9所示，當遮壁部20係與喇叭口周壁31一體形成時，遮壁部20係自喇叭口周壁31突出，在葉輪2之徑向中，自喇叭口周壁31往內周緣部32b延伸。亦即，遮壁部20的外周緣部側，係與喇叭口周壁31一體形成，遮壁部20係在葉輪2之徑向中，自喇叭口周壁31往內周緣部32b延伸。與喇叭口周壁31一體形成之遮壁部20，也可以具有上述之落差部20b，或者，斜面部20c。As shown in Fig. 9, when the shielding wall part 20 is integrally formed with the bell mouth peripheral wall 31, the shielding wall part 20 protrudes from the bell mouth peripheral wall 31, and in the radial direction of the impeller 2, from the bell mouth peripheral wall 31 to the inner peripheral edge 32b extended. That is, the outer peripheral edge side of the shielding wall portion 20 is integrally formed with the bell mouth peripheral wall 31 , and the shield wall portion 20 extends from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32 b in the radial direction of the impeller 2 . The shielding wall portion 20 integrally formed with the bell mouth peripheral wall 31 may also have the above-mentioned drop portion 20b, or an inclined portion 20c.
遮壁部20係由發泡苯乙烯等之發泡材所形成。而且，遮壁部20係並不侷限於由發泡材所形成。例如遮壁部20可以由樹脂材料所形成，也可以由金屬材料所形成。The shielding wall portion 20 is formed of a foam material such as foamed styrene. Moreover, the shielding wall portion 20 is not limited to being formed of a foam material. For example, the shielding portion 20 may be formed of a resin material, or may be formed of a metal material.
［離心風扇1之動作例］
當葉輪2旋轉時，渦卷殼4外的空氣，係通過吸入口5以被吸入到渦卷殼4的內部。此時，被吸入渦卷殼4的內部之空氣，係被喇叭口3所導引，以被吸入由葉輪2所形成之空間47。被吸入由葉輪2所形成之空間47之空氣，係在通過複數扇葉2d間之過程中，成為被附加有動壓與靜壓之氣流，而往葉輪2的徑向外側被吹出。[Operation example of centrifugal fan 1]
When the impeller 2 rotates, the air outside the scroll casing 4 is sucked into the scroll casing 4 through the suction port 5 . At this time, the air sucked into the scroll casing 4 is guided by the bell mouth 3 to be sucked into the space 47 formed by the impeller 2 . The air sucked into the space 47 formed by the impeller 2 becomes an air flow with dynamic pressure and static pressure added during passing through the plurality of fan blades 2d, and is blown out radially outward of the impeller 2.
自葉輪2被吹出之空氣，係在渦卷部41中，被導引於周壁4c的內側與扇葉2d間之時，動壓係被轉換為靜壓，通過渦卷部41後，自被形成於吐出部42之吐出口42a，被往渦卷殼4之外吹出。而且，自葉輪2被吹出之空氣，係於葉輪2的旋轉軸RS之軸向上具有速度分佈，在被使用之環境中，往葉輪2的側板2c側偏移。The air blown out from the impeller 2 is in the scroll portion 41, and when it is guided between the inner side of the peripheral wall 4c and the fan blade 2d, the dynamic pressure system is converted into a static pressure. After passing through the scroll portion 41, it is automatically The discharge port 42 a formed in the discharge part 42 blows out to the outside of the scroll casing 4 . Furthermore, the air blown from the impeller 2 has a velocity distribution in the axial direction of the rotation axis RS of the impeller 2, and is deviated toward the side plate 2c of the impeller 2 in the environment in which it is used.
［離心風扇1之作用效果］
圖10係表示實施形態1之離心風扇1內之風流之示意圖。首先，如上所述，離心風扇1的渦卷殼4係在葉輪2之徑向中，具有被設於喇叭口周壁31與內周緣部32b之間，自側壁4a往葉輪2側延伸之遮壁部20。而且，遮壁部20與側板2c間之距離D1，係被形成為小於周壁4c與側板2c間之距離及喇叭口周壁31與側板2c間之距離。[Effect of Centrifugal Fan 1]
Fig. 10 is a schematic diagram showing the air flow in the centrifugal fan 1 of the first embodiment. First, as mentioned above, the scroll casing 4 of the centrifugal fan 1 is located in the radial direction of the impeller 2, and has a shielding wall that is arranged between the bell mouth peripheral wall 31 and the inner peripheral edge portion 32b and extends from the side wall 4a to the impeller 2 side. Section 20. Furthermore, the distance D1 between the shielding wall portion 20 and the side plate 2c is formed to be smaller than the distance between the peripheral wall 4c and the side plate 2c and the distance between the bell mouth peripheral wall 31 and the side plate 2c.
自葉輪2流出之氣流FA，如圖10所示，係藉具有該構造之遮壁部20，阻止往再流入葉輪2之方向之流動，而沿著在葉輪2之徑向上延伸之遮壁部20流動。而且，氣流FA係自葉輪2被吹出之空氣，往葉輪2的側板2c側偏移，其係自側板2c的附近被吹出之空氣。The airflow FA flowing out from the impeller 2, as shown in FIG. 20 flows. Furthermore, the airflow FA is the air blown from the impeller 2, which deviates toward the side plate 2c side of the impeller 2, and is the air blown from the vicinity of the side plate 2c.
自葉輪2流出之氣流FA係藉遮壁部20，抑制再流入到葉輪2之情事。自葉輪2流出氣流FA係抑制再流入到葉輪2之情事，所以，自葉輪2流出之氣流FA係不會衝撞到扇葉2d，而產生當作扇葉2d之風切聲之噪音。因此，具有遮壁部20之離心風扇1，可防止自葉輪2流出之氣流FA再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。The airflow FA flowing out from the impeller 2 is suppressed from flowing into the impeller 2 again by the shielding wall portion 20 . The airflow FA flowing out from the impeller 2 is suppressed from flowing into the impeller 2 again, so the airflow FA flowing out from the impeller 2 will not collide with the fan blade 2d and generate noise as the wind cutting sound of the fan blade 2d. Therefore, the centrifugal fan 1 having the shielding portion 20 can prevent the airflow FA flowing out from the impeller 2 from flowing into the impeller 2 again, and at the same time suppress the noise generated by the airflow.
又，自葉輪2流出之氣流FA，係再流入到葉輪2之方向之流動被阻止，而沿著在葉輪2之徑向上延伸之遮壁部20流動。因此，被遮壁部20拒止流動之氣流FA，係不與自葉輪2流出之其他氣流FB及氣流FC相干涉。而且，也不會產生由被遮壁部20拒止流動之氣流FA，與自葉輪2流出之氣流FB及氣流FC之干涉所致之噪音。因此，具有遮壁部20之離心風扇1，係防止自葉輪2流出之氣流再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。Furthermore, the flow of the airflow FA flowing out from the impeller 2 is prevented from flowing into the impeller 2 again, and flows along the shielding wall portion 20 extending in the radial direction of the impeller 2 . Therefore, the airflow FA that is prevented from flowing by the shielding wall portion 20 does not interfere with the other airflows FB and FC flowing out from the impeller 2 . Furthermore, noise due to interference between the air flow FA blocked by the shielding wall portion 20 and the air flow FB and air flow FC flowing out from the impeller 2 does not occur. Therefore, the centrifugal fan 1 having the shielding portion 20 prevents the airflow flowing out from the impeller 2 from flowing into the impeller 2 again, and at the same time suppresses the noise generated by the airflow.
圖11係表示第1比較例之離心風扇1L內之風流之示意圖。比較例之離心風扇1L的渦卷殼4L，係不具有遮壁部20。在離心風扇1L內，自葉輪2被吹出之空氣，係在葉輪2的旋轉軸RS之軸向上具有速度分佈，在被使用之環境中，往葉輪2的側板2c側偏移。此時，一部份之氣流VR係逆流，不流動在渦卷殼4的內部空間45內，而通過側壁4a與側板2c間之間隙空間48，通過喇叭口3的內側，再度流入到葉輪2的內部。如此一來，自流動在渦卷殼4內之氣流洩漏，沿著喇叭口3裏側流動之氣流VR，係再流入到葉輪2的內部以衝撞到扇葉2d，而產生當作扇葉2d之風切聲之較大噪音。Fig. 11 is a schematic diagram showing the air flow in the centrifugal fan 1L of the first comparative example. The scroll casing 4L of the centrifugal fan 1L of the comparative example does not have the shielding wall portion 20 . In the centrifugal fan 1L, the air blown out from the impeller 2 has a velocity distribution in the axial direction of the rotating shaft RS of the impeller 2, and deviates toward the side plate 2c side of the impeller 2 in the environment in which it is used. At this time, a part of the air flow VR is counter-current and does not flow in the inner space 45 of the scroll casing 4, but passes through the gap space 48 between the side wall 4a and the side plate 2c, passes through the inner side of the bell mouth 3, and flows into the impeller 2 again. internal. In this way, from the leakage of the airflow flowing in the scroll casing 4, the airflow VR flowing along the inner side of the bell mouth 3 will flow into the inside of the impeller 2 to collide with the fan blade 2d, and generate a flow as the fan blade 2d. Loud noise of wind cutting.
圖12係表示第2比較例之離心風扇1R內之風流之示意圖。比較例之離心風扇1R的渦卷殼4R，係不具有遮壁部20，設有在葉輪2的旋轉軸RS之軸向上延伸之防回流板120。比較例之離心風扇1R，係藉在葉輪2的旋轉軸RS之軸向上延伸之防回流板120，逆流之氣流BR係往旋轉軸RS之軸向彎曲。因此，往旋轉軸RS之軸向彎曲，沿著防回流板120流動之逆流之氣流BR，有妨礙自葉輪2流出之氣流BA之流動之虞。又，往旋轉軸RS之軸向彎曲，沿著防回流板120流動之逆流之氣流BR，係與自葉輪2流出之氣流BA相干涉，而有產生噪音之虞。Fig. 12 is a schematic diagram showing the air flow in the centrifugal fan 1R of the second comparative example. The scroll casing 4R of the centrifugal fan 1R of the comparative example does not have the shielding wall portion 20, but is provided with a backflow prevention plate 120 extending in the axial direction of the rotation shaft RS of the impeller 2. In the centrifugal fan 1R of the comparative example, the backflow prevention plate 120 extending in the axial direction of the rotating shaft RS of the impeller 2 bends the counterflow airflow BR toward the axial direction of the rotating shaft RS. Therefore, the counterflow airflow BR that bends toward the axial direction of the rotation shaft RS and flows along the backflow prevention plate 120 may obstruct the flow of the airflow BA that flows out from the impeller 2 . Also, the countercurrent airflow BR that bends toward the axial direction of the rotating shaft RS and flows along the backflow prevention plate 120 interferes with the airflow BA flowing out from the impeller 2, which may cause noise.
相對於此，在實施形態1之離心風扇1內，如圖10所示，自葉輪2流出之氣流FA，係藉具有該構造之遮壁部20，再流入到葉輪2之方向之流動係被阻止，而沿著在葉輪2之徑向上延伸之遮壁部20流動。結果，離心風扇1係可防止自葉輪2流出之氣流FA，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。又，自葉輪2流出之氣流FA係沿著遮壁部20流動，所以，遮壁部20不會生成妨礙自葉輪2被吹出之空氣流動之氣流。On the other hand, in the centrifugal fan 1 of Embodiment 1, as shown in FIG. 10 , the airflow FA flowing out from the impeller 2 passes through the shielding wall portion 20 having this structure, and then flows in the direction of the impeller 2. block, and flow along the shielding wall portion 20 extending radially of the impeller 2 . As a result, the centrifugal fan 1 can prevent the airflow FA flowing out from the impeller 2 from flowing into the impeller 2, and suppress the noise generated by the airflow. Also, the airflow FA flowing out from the impeller 2 flows along the shielding wall portion 20, so the shielding wall portion 20 does not generate an airflow that hinders the flow of the air blown out from the impeller 2.
又，此遮壁部20係在主板2a的旋轉軸RS之軸向中，被設於比側板2c的主板側端部2c1還要靠近外周緣部32a側。在此情形下，遮壁部20係不妨礙自葉輪2被吹出之氣流之流動。因此，具有遮壁部20之離心風扇1，係可防止自葉輪2流出之氣流，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。Moreover, this shielding wall part 20 is provided in the axial direction of the rotation shaft RS of the main board 2a, and is provided on the side of the outer peripheral edge part 32a rather than the main board side end part 2c1 of the side plate 2c. In this case, the shielding wall portion 20 does not hinder the flow of the airflow blown out from the impeller 2 . Therefore, the centrifugal fan 1 having the shielding wall portion 20 can prevent the airflow flowing out from the impeller 2 from flowing into the impeller 2 again, and can suppress the noise generated by the airflow at the same time.
又，遮壁部20係在葉輪2之徑向中，與側板2c相向。因此，自喇叭口周壁31往內周緣部32b延伸之遮壁部20，可減少第1比較例所示之側壁4a與側板2c間之間隙空間48。因此，自葉輪2流出之氣流FA，如圖10所示，係藉具有該構造之遮壁部20，再流入到葉輪2之方向之流動被阻止，而沿著在葉輪2之徑向上延伸之遮壁部20流動。結果，離心風扇1係可防止自葉輪2流出之氣流FA，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。Moreover, the shielding wall portion 20 is arranged in the radial direction of the impeller 2 and faces the side plate 2c. Therefore, the shielding wall portion 20 extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b can reduce the gap space 48 between the side wall 4a and the side plate 2c shown in the first comparative example. Therefore, the airflow FA flowing out from the impeller 2, as shown in FIG. The shielding portion 20 flows. As a result, the centrifugal fan 1 can prevent the airflow FA flowing out from the impeller 2 from flowing into the impeller 2, and suppress the noise generated by the airflow.
又，尖端部20a係具有主板2a側的壁面形成傾斜面之傾斜部20a1。而且，主板2a側的壁面，係與自葉輪2被吹出之空氣相接觸之面。遮壁部20係為了確保強度，在旋轉軸RS之軸向中，最好盡量具有厚度。但是，當係在旋轉軸RS之軸向中，具有厚度之遮壁部20時，因為尖端部20a之位置，尖端部20a有阻礙自葉輪2被吹出之空氣之流動之虞。當尖端部20a具有傾斜部20a1時，自葉輪2被吹出之空氣，變得很容易沿著傾斜部20a1的傾斜面流動。因此，遮壁部20係藉具有傾斜部20a1，可使自葉輪2被吹出之空氣較容易流動。Furthermore, the tip portion 20a has an inclined portion 20a1 in which the wall surface on the side of the main plate 2a forms an inclined surface. Furthermore, the wall surface on the side of the main plate 2a is a surface in contact with the air blown out from the impeller 2 . In order to secure the strength, the shielding wall portion 20 preferably has as thick as possible in the axial direction of the rotation shaft RS. However, when the shielding wall portion 20 has a thickness in the axial direction of the rotating shaft RS, the tip portion 20a may hinder the flow of air blown from the impeller 2 due to the position of the tip portion 20a. When the tip portion 20a has the inclined portion 20a1, the air blown from the impeller 2 easily flows along the inclined surface of the inclined portion 20a1. Therefore, the shielding wall portion 20 can make the air blown out from the impeller 2 flow more easily by having the inclined portion 20 a 1 .
又，遮壁部20係在旋轉軸RS之軸向上觀看之俯視中，被形成為環狀。因此，離心風扇1係不考慮流入吸入口5之空氣之流量之較多部分與較少部分地，可決定吐出口42a之方向。Moreover, the shielding wall portion 20 is formed in a ring shape in a plan view viewed in the axial direction of the rotation shaft RS. Therefore, the centrifugal fan 1 can determine the direction of the discharge port 42a without considering the large portion and the small portion of the flow rate of the air flowing into the suction port 5 .
又，遮壁部20係與側壁4a一體形成。渦卷殼4係藉具有該構造，可減少零件數量，可使組裝較容易。又，渦卷殼4係藉具有該構造，可削減製造成本及材料成本等成本。Moreover, the shielding wall part 20 is formed integrally with the side wall 4a. The scroll casing 4 has this structure, which can reduce the number of parts and make assembly easier. Moreover, since the scroll casing 4 has this structure, costs such as manufacturing cost and material cost can be reduced.
或者，遮壁部20係與喇叭口周壁31一體形成。渦卷殼4係遮壁部20藉具有該構造，可減少零件數量，可使組裝較容易。又，渦卷殼4係遮壁部20藉具有該構造，可削減製造成本及材料成本等成本。Alternatively, the shielding wall portion 20 is integrally formed with the bell mouth peripheral wall 31 . With this structure of the scroll casing 4 and the shielding wall portion 20, the number of parts can be reduced and the assembly can be made easier. Moreover, since the scroll casing 4 and the shielding portion 20 have this structure, costs such as manufacturing cost and material cost can be reduced.
又，渦卷殼4係由發泡材所形成。渦卷殼4係藉具有該構造，可輕量化離心風扇1。又，渦卷殼4係藉具有該構造，可較容易進行造型。又，渦卷殼4係藉具有該構造，可削減製造成本及材料成本等成本。Also, the scroll casing 4 is formed of a foam material. The scroll casing 4 has this structure, which can reduce the weight of the centrifugal fan 1 . Moreover, the scroll casing 4 is formed by having this structure, so that it can be molded more easily. Moreover, since the scroll casing 4 has this structure, costs such as manufacturing cost and material cost can be reduced.
又，遮壁部20係由發泡材所形成。渦卷殼4係遮壁部20藉具有該構造，可輕量化離心風扇1。又，渦卷殼4係遮壁部20藉具有該構造，可較容易進行造型。又，渦卷殼4係遮壁部20藉具有該構造，可削減製造成本及材料成本等成本。In addition, the shielding wall portion 20 is formed of a foam material. The centrifugal fan 1 can be reduced in weight by having the structure of the scroll casing 4 and the shielding wall portion 20 . In addition, since the scroll casing 4 and the shielding wall portion 20 have this structure, it can be molded more easily. Moreover, since the scroll casing 4 and the shielding portion 20 have this structure, costs such as manufacturing cost and material cost can be reduced.
又，離心風扇1還包括賦予驅動力到葉輪2之驅動裝置6。即使離心風扇1係使驅動裝置6設於內，也可防止自葉輪2流出之氣流FA，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。In addition, the centrifugal fan 1 further includes a driving device 6 for applying a driving force to the impeller 2 . Even if the centrifugal fan 1 is provided with the driving device 6 inside, the airflow FA flowing out from the impeller 2 can be prevented from flowing into the impeller 2 again, and the noise generated by the airflow can be suppressed at the same time.
實施形態2.
［離心風扇1A］
圖13係實施形態2離心風扇1A之放大圖。圖13所示之離心風扇1A，係圖3所示之離心風扇1的範圍AR之部分之放大圖。而且，對於具有與圖1～圖12之離心風扇1相同之構造之部位，係賦予相同編號，其說明則省略之。實施形態2之離心風扇1A，係實施形態1之離心風扇1中之遮壁部20之形狀不同。因此，在以下之說明中，係使用圖13，針對實施形態2之離心風扇1A的遮壁部21，以與實施形態1之離心風扇1的遮壁部20不同之點為中心做說明。Implementation form 2.
[Centrifugal fan 1A]
Fig. 13 is an enlarged view of the centrifugal fan 1A of the second embodiment. The centrifugal fan 1A shown in FIG. 13 is an enlarged view of a part of the range AR of the centrifugal fan 1 shown in FIG. 3 . In addition, the parts having the same structure as those of the centrifugal fan 1 shown in FIGS. 1 to 12 are given the same reference numerals, and description thereof will be omitted. The centrifugal fan 1A of the second embodiment is different from the centrifugal fan 1 of the first embodiment in the shape of the shielding wall portion 20 . Therefore, in the following description, using FIG. 13 , the shielding wall portion 21 of the centrifugal fan 1A according to the second embodiment will be described centering on the differences from the shielding wall portion 20 of the centrifugal fan 1 according to the first embodiment.
（遮壁部21）
渦卷殼4係在葉輪2之徑向中，具有自喇叭口周壁31往內周緣部32b延伸之遮壁部21。遮壁部21係阻止自葉輪2流出之氣流，再流入到葉輪2之方向上之流動者。遮壁部21係由發泡苯乙烯等之發泡材所形成。而且，遮壁部21並不侷限於由發泡材所形成。例如遮壁部21也可以係由樹脂材料所形成，或者，由金屬材料所形成。(shield part 21)
The scroll casing 4 is located in the radial direction of the impeller 2 and has a shielding wall portion 21 extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b. The shielding wall part 21 prevents the airflow flowing out from the impeller 2 from flowing into the direction of the impeller 2 again. The shielding wall portion 21 is formed of a foam material such as foamed styrene. Moreover, the shielding wall portion 21 is not limited to being formed of a foam material. For example, the shielding portion 21 may also be formed of a resin material, or may be formed of a metal material.
而且，遮壁部21係可以為一個構件之構造，或者，組合兩個以上構件以構成。例如遮壁部21也可以藉發泡材、樹脂材料、或金屬材料，以一個構件構成之。或者，遮壁部21也可以係藉遮壁部20、及填充遮壁部20與空氣取入部32間之填充構件21a而被構成。填充構件21a雖然期望與遮壁部21為相同構件，但是，其也可以係不同構件。填充構件21a係例如發泡材、樹脂材料、或金屬材料。Furthermore, the shielding wall portion 21 may be configured as a single member, or may be formed by combining two or more members. For example, the shielding wall portion 21 may be formed as a single member by a foam material, a resin material, or a metal material. Alternatively, the shielding wall portion 21 may be constituted by the shielding wall portion 20 and the filling member 21 a filling the space between the shielding wall portion 20 and the air intake portion 32 . The filling member 21a is desirably the same member as the shielding wall portion 21, but may be a different member. The filling member 21a is, for example, a foam material, a resin material, or a metal material.
如圖13所示，遮壁部21係在沿著旋轉軸RS之剖面中，被形成為塊狀。遮壁部21係在旋轉軸RS之軸向中，與空氣取入部32相抵接。又，如圖13所示，遮壁部21係被形成為相對於旋轉軸RS而言，於垂直方向上延伸。As shown in FIG. 13 , the shielding wall portion 21 is formed in a block shape in a cross section along the rotation axis RS. The shielding wall portion 21 is in contact with the air intake portion 32 in the axial direction of the rotation shaft RS. Moreover, as shown in FIG. 13, the shielding wall part 21 is formed so that it may extend in the vertical direction with respect to the rotation axis RS.
如圖13所示，遮壁部21係在主板2a的旋轉軸RS之軸向中，被設於比成為側板2c的主板2a側的端部之主板側端部2c1，還要靠近外周緣部32a側。亦即，遮壁部21係在與主板2a的旋轉軸RS之軸向平行之方向中，被形成於主板側端部2c1之位置與外周緣部32a之位置之間。As shown in FIG. 13 , the shielding wall portion 21 is arranged in the axial direction of the rotation axis RS of the main plate 2a, and is provided closer to the outer peripheral portion than the main plate-side end portion 2c1 serving as the end portion of the side plate 2c on the main plate 2a side. 32a side. That is, the shielding wall portion 21 is formed between the position of the main plate side end portion 2c1 and the position of the outer peripheral edge portion 32a in a direction parallel to the axial direction of the rotation axis RS of the main plate 2a.
遮壁部21係在葉輪2之徑向中，與側板2c相向。例如如圖13所示，遮壁部21係被形成為形成遮壁部21的內周側的緣部之尖端部20a的一部份與側板2c，係在葉輪2之徑向中相向。在此，於葉輪2之徑向中，將遮壁部21與側板2c間之距離當作距離D1。距離D1係被形成為小於周壁4c與側板2c間之距離。而且，距離D1係被形成為小於喇叭口周壁31與側板2c間之距離。而且，尖端部20a也可以具有傾斜部20a1。The shielding wall portion 21 is located in the radial direction of the impeller 2 and faces the side plate 2c. For example, as shown in FIG. 13 , the shielding wall portion 21 is formed so that a part of the tip portion 20 a forming the inner peripheral edge of the shielding wall portion 21 and the side plate 2 c face each other in the radial direction of the impeller 2 . Here, in the radial direction of the impeller 2, the distance between the shielding wall portion 21 and the side plate 2c is defined as a distance D1. The distance D1 is formed to be smaller than the distance between the peripheral wall 4c and the side plate 2c. Also, the distance D1 is formed to be smaller than the distance between the bell mouth peripheral wall 31 and the side plate 2c. Moreover, the tip part 20a may have the inclined part 20a1.
在實施形態2中，渦卷殼4係在沿著旋轉軸RS之剖面中，具有自喇叭口周壁31往側板2c延伸之遮壁部21。而且，與喇叭口周壁31的第1側壁4a1側的端部與葉輪2的側板2c之位置關係無關地，尖端部20a與側板2c間之距離D1，係小於周壁4c與側板2c之距離及喇叭口周壁31與側板2c之距離。In Embodiment 2, the scroll casing 4 has the shielding wall portion 21 extending from the bell mouth peripheral wall 31 to the side plate 2c in a cross section along the rotation axis RS. Moreover, regardless of the positional relationship between the end of the first side wall 4a1 side of the bell mouth peripheral wall 31 and the side plate 2c of the impeller 2, the distance D1 between the tip portion 20a and the side plate 2c is smaller than the distance between the peripheral wall 4c and the side plate 2c and the distance between the horn The distance between the perioral wall 31 and the side plate 2c.
［離心風扇1A之作用效果］
遮壁部21係在旋轉軸RS之軸向中，與空氣取入部32相抵接。因此，如圖13所示，遮壁部21係在沿著旋轉軸RS之剖面中，形成為塊狀。遮壁部21係與遮壁部20相比較下，在旋轉軸RS之軸向上具有厚度，藉此，可確保強度大於遮壁部20。[Effect of Centrifugal Fan 1A]
The shielding wall portion 21 is in contact with the air intake portion 32 in the axial direction of the rotation shaft RS. Therefore, as shown in FIG. 13 , the shielding portion 21 is formed in a block shape in a cross section along the rotation axis RS. Compared with the shielding wall portion 20 , the shielding wall portion 21 has a thickness in the axial direction of the rotation axis RS, thereby ensuring greater strength than the shielding wall portion 20 .
又，離心風扇1A係具有遮壁部21，藉此，其與具有遮壁部20之情形同樣地，可防止自葉輪2流出之氣流，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。Also, the centrifugal fan 1A has the shielding wall portion 21, whereby, like the case of having the shielding wall portion 20, it can prevent the airflow flowing out from the impeller 2 from flowing into the impeller 2 again, and at the same time, it can suppress the flow caused by the airflow. the noise produced.
實施形態3.
［離心風扇1B］
圖14係實施形態3之離心風扇1B之放大圖。圖14所示之離心風扇lB，係圖3所示之離心風扇1的範圍AR之部分之放大圖。而且，在具有與圖1～圖13之離心風扇1等相同之構造之部位，係賦予相同之編號，省略其說明。實施形態3之離心風扇1B，係實施形態1之離心風扇1中之遮壁部20之形狀不同。因此，在以下之說明中，使用圖14，針對實施形態3之離心風扇lB的遮壁部22，以與實施形態1之離心風扇1的遮壁部20不同之點為中心做說明。Implementation form 3.
[Centrifugal fan 1B]
Fig. 14 is an enlarged view of a centrifugal fan 1B of Embodiment 3. The centrifugal fan 1B shown in FIG. 14 is an enlarged view of the part of the range AR of the centrifugal fan 1 shown in FIG. 3 . In addition, the parts having the same structure as those of the centrifugal fan 1 in FIGS. 1 to 13 are given the same reference numerals, and description thereof will be omitted. The centrifugal fan 1B of the third embodiment is different from the centrifugal fan 1 of the first embodiment in the shape of the shielding wall portion 20 . Therefore, in the following description, using FIG. 14 , the shielding wall portion 22 of the centrifugal fan 1B according to the third embodiment will be described centering on the differences from the shielding wall portion 20 of the centrifugal fan 1 according to the first embodiment.
（遮壁部22）
如圖14所示，渦卷殼4係在葉輪2之徑向中，具有自喇叭口周壁31往內周緣部32b延伸之遮壁部22。遮壁部22係阻止自葉輪2流出之氣流，再流入到葉輪2之方向上之流動。遮壁部22係由與遮壁部20同樣之材料所形成。(shield part 22)
As shown in FIG. 14 , the scroll casing 4 is located in the radial direction of the impeller 2 and has a shielding wall portion 22 extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b. The shielding wall portion 22 prevents the flow of the airflow flowing out from the impeller 2 and then flowing into the direction of the impeller 2 . The shielding wall portion 22 is formed of the same material as that of the shielding wall portion 20 .
遮壁部22係在與旋轉軸RS之軸向平行之方向上觀看之俯視中，被形成為圓環狀。而且，遮壁部22係在與旋轉軸RS之軸向平行之方向上觀看之俯視中，並不侷限於被形成為圓環狀，其也可以被形成為圓弧狀。The shielding wall portion 22 is formed in an annular shape in a plan view viewed in a direction parallel to the axial direction of the rotation shaft RS. In addition, the shielding wall portion 22 is not limited to being formed in an annular shape in a plan view viewed in a direction parallel to the axial direction of the rotation shaft RS, and may be formed in an arcuate shape.
如圖14所示，遮壁部22係在沿著旋轉軸RS之剖面中，被形成為板狀。而且，遮壁部22並不侷限於被形成為板狀之構造。例如、遮壁部22係也可以被形成為在旋轉軸RS之軸向中，具有厚度之塊狀。遮壁部22也可以具有傾斜部20a1。As shown in FIG. 14 , the shielding wall portion 22 is formed in a plate shape in a cross section along the rotation axis RS. Moreover, the shielding wall part 22 is not limited to the structure formed in plate shape. For example, the shielding portion 22 may be formed in a block shape having a thickness in the axial direction of the rotation shaft RS. The shielding wall portion 22 may have an inclined portion 20a1.
如圖14所示，遮壁部22係被形成為板狀，被形成為相對於旋轉軸RS而言，在垂直之方向上延伸。而且，遮壁部22之延伸方向，係並不侷限於相對於旋轉軸RS而言，垂直之方向，其也可以係相對於與旋轉軸RS垂直之方向而言，傾斜之方向。亦即，遮壁部22係也可以被形成為在沿著旋轉軸RS之剖面中，相對於與旋轉軸RS垂直之方向而言，傾斜之形狀。但是，遮壁部22係不包含被形成為在與旋轉軸RS平行之方向上延伸之形狀。As shown in FIG. 14 , the shielding wall portion 22 is formed in a plate shape and is formed to extend in a direction perpendicular to the rotation axis RS. Moreover, the extending direction of the shielding wall portion 22 is not limited to a direction perpendicular to the rotation axis RS, and may also be an inclined direction relative to the direction perpendicular to the rotation axis RS. That is, the shielding wall part 22 may be formed in the shape inclined with respect to the direction perpendicular to the rotation axis RS in the cross section along the rotation axis RS. However, the shielding portion 22 does not include a shape formed to extend in a direction parallel to the rotation axis RS.
如圖14所示，遮壁部22係在主板2a的旋轉軸RS之軸向中，被設於比成為側板2c的主板2a側的端部之主板側端部2c1，還要靠近外周緣部32a側。亦即，遮壁部22係在與主板2a的旋轉軸RS之軸向平行之方向中，被形成於主板側端部2c1之位置與外周緣部32a之位置之間。As shown in FIG. 14 , the shielding wall portion 22 is arranged in the axial direction of the rotation axis RS of the main plate 2a, and is provided closer to the outer peripheral portion than the main plate-side end portion 2c1 that becomes the end portion of the side plate 2c on the main plate 2a side. 32a side. That is, the shielding wall portion 22 is formed between the position of the main plate side end portion 2c1 and the position of the outer peripheral edge portion 32a in a direction parallel to the axial direction of the rotation axis RS of the main plate 2a.
遮壁部22係被形成為板狀，在旋轉軸RS之軸向中，與側板2c相向。換言之，遮壁部22係被形成為板狀，形成遮壁部22的內周側的緣部之尖端部22a與側板2c，係在葉輪2之徑向中，不相向。遮壁部22的尖端部22a係在葉輪2之徑向中，位於比側板2c還要靠近旋轉軸RS側之位置。離心風扇1B係在與旋轉軸RS之軸向平行地觀看之俯視中，自旋轉軸RS的軸側往外側，依序配置有內周緣部32b、尖端部22a、側板2c、及喇叭口周壁31。The shielding wall portion 22 is formed in a plate shape, and faces the side plate 2c in the axial direction of the rotation shaft RS. In other words, the shielding wall portion 22 is formed in a plate shape, and the tip portion 22a forming the inner peripheral edge of the shielding wall portion 22 and the side plate 2c are not opposed to each other in the radial direction of the impeller 2 . The tip portion 22a of the shielding wall portion 22 is located in the radial direction of the impeller 2 and is located closer to the rotation axis RS side than the side plate 2c. Centrifugal fan 1B is viewed from a plane parallel to the axial direction of the rotating shaft RS, and from the axial side of the rotating shaft RS to the outside, the inner peripheral edge portion 32b, the tip portion 22a, the side plate 2c, and the bell mouth surrounding wall 31 are sequentially arranged. .
在此，在與旋轉軸RS之軸向平行之方向中，將遮壁部22與側板2c間之距離當作距離D2。更詳細地說來，在與旋轉軸RS之軸向平行之方向中，將與葉輪2相向之遮壁部22的相向面22b與側板2c間之距離，當作距離D2。距離D2係被形成為小於周壁4c與側板2c間之距離。而且，距離D2係被形成為小於喇叭口周壁31與側板2c間之距離。Here, the distance between the shielding wall portion 22 and the side plate 2 c is defined as a distance D2 in a direction parallel to the axial direction of the rotation shaft RS. More specifically, the distance between the facing surface 22b of the shielding wall portion 22 facing the impeller 2 and the side plate 2c in a direction parallel to the axial direction of the rotating shaft RS is taken as the distance D2. The distance D2 is formed to be smaller than the distance between the peripheral wall 4c and the side plate 2c. Also, the distance D2 is formed to be smaller than the distance between the bell mouth peripheral wall 31 and the side plate 2c.
在實施形態3中，渦卷殼4係在沿著旋轉軸RS之剖面中，具有自喇叭口周壁31往內周緣部32b延伸之遮壁部22。而且，與喇叭口周壁31的第1側壁4a1側的端部與葉輪2的側板2c之位置關係無關地，遮壁部22的相向面22b與側板2c間之距離D2，係小於周壁4c與側板2c之距離及喇叭口周壁31與側板2c之距離。In the third embodiment, the scroll casing 4 has the shielding wall portion 22 extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b in a cross section along the rotation axis RS. Moreover, regardless of the positional relationship between the end of the first side wall 4a1 side of the bell mouth peripheral wall 31 and the side plate 2c of the impeller 2, the distance D2 between the facing surface 22b of the shielding wall portion 22 and the side plate 2c is smaller than that between the peripheral wall 4c and the side plate. 2c and the distance between the bell mouth peripheral wall 31 and the side plate 2c.
［離心風扇1B之作用效果］
離心風扇1B的渦卷殼4係具有遮壁部22。在葉輪2之徑向中，具有被設於喇叭口周壁31與內周緣部32b之間，自喇叭口周壁31往內周緣部32b延伸之遮壁部22。而且，此遮壁部22係在旋轉軸RS之軸向中，與側板2c相向。又，遮壁部22與側板2c間之距離D2，係被形成為小於周壁4c與側板2c間之距離及喇叭口周壁31與側板2c間之距離。[Effect of Centrifugal Fan 1B]
The scroll casing 4 of the centrifugal fan 1B has a shielding wall portion 22 . In the radial direction of the impeller 2, there is a shielding wall portion 22 provided between the bell mouth peripheral wall 31 and the inner peripheral edge portion 32b, and extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b. And, this shielding wall portion 22 faces the side plate 2c in the axial direction of the rotation shaft RS. Also, the distance D2 between the shielding wall portion 22 and the side plate 2c is formed to be smaller than the distance between the peripheral wall 4c and the side plate 2c and the distance between the bell mouth peripheral wall 31 and the side plate 2c.
離心風扇1B係具有該構成的遮壁部22，藉此，可防止自葉輪2被吹出之空氣，在再流入到葉輪2之方向上流動。因此，自葉輪2流出之氣流，再流入到葉輪2之情事係被抑制，所以，自葉輪2流出之氣流係不會衝撞到扇葉2d，而產生當作扇葉2d之風切聲之噪音。因此，具有遮壁部22之離心風扇lB，係可防止自葉輪2流出之氣流，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。The centrifugal fan 1B has the shielding wall portion 22 having such a structure, whereby the air blown out from the impeller 2 can be prevented from flowing in the direction of reflowing into the impeller 2 . Therefore, the flow of the airflow flowing out from the impeller 2 into the impeller 2 is suppressed, so the airflow flowing out from the impeller 2 will not collide with the fan blade 2d, and generate noise as the wind cutting sound of the fan blade 2d. . Therefore, the centrifugal fan 1B having the shielding wall portion 22 can prevent the airflow flowing out from the impeller 2 from flowing into the impeller 2 again, and simultaneously suppress the noise generated by the airflow.
又，自葉輪2流出之氣流，在再流入到葉輪2之方向上之流動係被阻止，而沿著在葉輪2之徑向上延伸之遮壁部22流動。因此，藉遮壁部22而流動被拒止之氣流，不會與自葉輪2流出之其他氣流相干涉。因此，也不會產生由藉遮壁部22而流動被拒止之氣流，與自葉輪2流出之氣流相干涉所致之噪音。結果，離心風扇1B係可防止自葉輪2流出之氣流，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。Moreover, the flow of the airflow flowing out from the impeller 2 is prevented from flowing into the impeller 2 again, and flows along the shielding wall portion 22 extending in the radial direction of the impeller 2 . Therefore, the blocked airflow flowing through the shielding wall portion 22 will not interfere with other airflows flowing out from the impeller 2 . Therefore, there is no noise caused by interference of the air flow blocked by the shielding wall portion 22 with the air flow flowing out from the impeller 2 . As a result, the centrifugal fan 1B can prevent the airflow flowing out from the impeller 2 from flowing into the impeller 2 again, and suppress the noise generated by the airflow.
實施形態4.
〔離心風扇1C〕
圖15係實施形態4之離心風扇1C之放大圖。圖15所示之離心風扇1C，係圖3所示之離心風扇1的範圍AR之部分之放大圖。而且，對於具有與圖1～圖14之離心風扇1等相同構造之部位，係賦予相同之編號，省略其說明。實施形態4之離心風扇1C，係實施形態3之離心風扇lB中之遮壁部22之形狀不同。因此，在以下之說明中，使用圖15，針對實施形態4之離心風扇lC的遮壁部23，以與實施形態3之離心風扇1B的遮壁部22不同之點為中心做說明。Implementation form 4.
〔Centrifugal fan 1C〕
Fig. 15 is an enlarged view of a centrifugal fan 1C according to Embodiment 4. The centrifugal fan 1C shown in FIG. 15 is an enlarged view of a part of the range AR of the centrifugal fan 1 shown in FIG. 3 . In addition, the parts having the same structure as those of the centrifugal fan 1 in FIGS. 1 to 14 are given the same reference numerals, and description thereof will be omitted. The centrifugal fan 1C of Embodiment 4 is different in the shape of the shielding wall part 22 in the centrifugal fan 1B of Embodiment 3. Therefore, in the following description, using FIG. 15 , the shielding wall portion 23 of the centrifugal fan 1C according to the fourth embodiment will be described centering on the differences from the shielding wall portion 22 of the centrifugal fan 1B according to the third embodiment.
（遮壁部23）
渦卷殼4係在葉輪2之徑向中，具有自喇叭口周壁31往內周緣部32b延伸之遮壁部23。遮壁部23係阻止自葉輪2流出之氣流，於再流入到葉輪2之方向上流動。遮壁部23係由發泡苯乙烯等之發泡材所形成。而且，遮壁部23係並不侷限於由發泡材所形成。例如遮壁部23也可以由樹脂材料所形成，或者，由金屬材料所形成。(shield part 23)
The scroll casing 4 is located in the radial direction of the impeller 2 and has a shielding wall portion 23 extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b. The shielding wall portion 23 prevents the airflow flowing out from the impeller 2 from flowing in the direction of reflowing into the impeller 2 . The shielding wall portion 23 is formed of a foam material such as foamed styrene. Moreover, the shielding wall portion 23 is not limited to being formed of a foam material. For example, the shielding portion 23 may be formed of a resin material, or may be formed of a metal material.
而且，遮壁部23可以係一個構件之構造，也可以係組合兩個以上構件以構成。例如遮壁部23可以藉發泡材、樹脂材料、或金屬材料，以一個構件構成。或者，遮壁部23係藉遮壁部22、及填充遮壁部22與空氣取入部32間之填充構件23a而被構成。填充構件23a雖然期望為與遮壁部22相同之構件，但是，其也可以係不同之構件。填充構件23a係例如發泡材、樹脂材料、或金屬材料。Furthermore, the shielding wall portion 23 may be configured as a single member, or may be configured by combining two or more members. For example, the shielding wall portion 23 may be constituted as one member by a foam material, a resin material, or a metal material. Alternatively, the shielding wall portion 23 is constituted by the shielding wall portion 22 and the filling member 23 a filling the gap between the shielding wall portion 22 and the air intake portion 32 . The filling member 23a is desirably the same member as the shielding wall portion 22, but may be a different member. The filling member 23a is, for example, a foam material, a resin material, or a metal material.
如圖15所示，遮壁部23係在沿著旋轉軸RS之剖面中，被形成為塊狀。遮壁部23係在旋轉軸RS之軸向中，與空氣取入部32相抵接。又，如圖15所示，遮壁部23係被形成為在相對於旋轉軸RS而言，垂直之方向上延伸。而且，尖端部22a也可以具有傾斜部20a1。As shown in FIG. 15 , the shielding wall portion 23 is formed in a block shape in a cross section along the rotation axis RS. The shielding wall portion 23 is in contact with the air intake portion 32 in the axial direction of the rotation shaft RS. Furthermore, as shown in FIG. 15 , the shielding wall portion 23 is formed to extend in a direction perpendicular to the rotation axis RS. Moreover, the tip part 22a may have the inclined part 20a1.
如圖15所示，遮壁部23係在主板2a的旋轉軸RS之軸向中，被設於比成為側板2c的主板2a側的端部之主板側端部2c1，還要靠近外周緣部32a側。亦即，遮壁部23係在與主板2a的旋轉軸RS之軸向平行之方向中，被形成於主板側端部2c1之位置與外周緣部32a之位置之間。As shown in FIG. 15, the shielding wall part 23 is provided in the axial direction of the rotation axis RS of the main board 2a, and is provided closer to the outer peripheral edge than the main board side end part 2c1 which becomes the end part of the main board 2a side of the side plate 2c. 32a side. That is, the shielding wall portion 23 is formed between the position of the main plate side end portion 2c1 and the position of the outer peripheral edge portion 32a in a direction parallel to the axial direction of the rotational axis RS of the main plate 2a.
在此，於與旋轉軸RS之軸向平行之方向中，將遮壁部23與側板2c間之距離，當作距離D2。更詳細地說來，於與旋轉軸RS之軸向平行之方向中，將與葉輪2相向之遮壁部23的相向面22b與側板2c間之距離，當作距離D2。距離D2係被形成為小於周壁4c與側板2c間之距離。而且，距離D2係被形成為小於喇叭口周壁31與側板2c間之距離。Here, the distance between the shielding wall portion 23 and the side plate 2c in a direction parallel to the axial direction of the rotation shaft RS is defined as a distance D2. More specifically, the distance between the facing surface 22b of the shielding wall portion 23 facing the impeller 2 and the side plate 2c in a direction parallel to the axial direction of the rotating shaft RS is taken as the distance D2. The distance D2 is formed to be smaller than the distance between the peripheral wall 4c and the side plate 2c. Also, the distance D2 is formed to be smaller than the distance between the bell mouth peripheral wall 31 and the side plate 2c.
在實施形態4中，渦卷殼4係在沿著旋轉軸RS之剖面中，具有自喇叭口周壁31往內周緣部32b延伸之遮壁部23。而且，與喇叭口周壁31的第1側壁4a1側的端部與葉輪2的側板2c之位置關係無關地，遮壁部23的相向面22b與側板2c間之距離D2，係小於周壁4c與側板2c之距離及喇叭口周壁31與側板2c之距離。In the fourth embodiment, the scroll casing 4 has the shielding wall portion 23 extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b in a cross section along the rotation axis RS. Moreover, regardless of the positional relationship between the end of the first side wall 4a1 side of the bell mouth peripheral wall 31 and the side plate 2c of the impeller 2, the distance D2 between the facing surface 22b of the shielding wall portion 23 and the side plate 2c is smaller than that between the peripheral wall 4c and the side plate. 2c and the distance between the bell mouth peripheral wall 31 and the side plate 2c.
［離心風扇1C之作用效果］
遮壁部23係在旋轉軸RS之軸向中，與空氣取入部32相抵接。因此，如圖15所示，遮壁部23係在沿著旋轉軸RS之剖面中，被形成為塊狀。遮壁部23係與遮壁部22相比較下，藉在旋轉軸RS之軸向上具有厚度，可確保強度大於遮壁部22。[Effect of Centrifugal Fan 1C]
The shielding wall portion 23 is in contact with the air intake portion 32 in the axial direction of the rotation shaft RS. Therefore, as shown in FIG. 15 , the shielding portion 23 is formed in a block shape in a cross section along the rotation axis RS. Compared with the shielding wall portion 22 , the shielding wall portion 23 has a thickness in the axial direction of the rotation axis RS, thereby ensuring a greater strength than the shielding wall portion 22 .
又，離心風扇1C係藉具有遮壁部23，其與具有遮壁部22之情形同樣地，可防止自葉輪2流出之氣流，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。Also, the centrifugal fan 1C is provided with the shielding wall portion 23, which, like the case with the shielding wall portion 22, can prevent the airflow flowing out from the impeller 2 from flowing into the impeller 2 again, and can suppress the airflow generated by the airflow at the same time. noise.
實施形態5.
［離心風扇1D］
圖16係實施形態5之離心風扇1D之放大圖。圖16所示之離心風扇1D，係圖3所示之離心風扇1的範圍AR之部分之放大圖。而且，對於具有與圖1～圖15之離心風扇1等相同構造之部位，係賦予相同之編號，省略其說明。實施形態5之離心風扇1D，係實施形態3之離心風扇1B中之遮壁部22之形狀不同。因此，在以下之說明中，使用圖16，針對實施形態5之離心風扇1D的遮壁部24，以與實施形態3之離心風扇1B的遮壁部22不同之點為中心做說明。Implementation form 5.
[Centrifugal fan 1D]
Fig. 16 is an enlarged view of a centrifugal fan 1D according to Embodiment 5. The centrifugal fan 1D shown in FIG. 16 is an enlarged view of a part of the range AR of the centrifugal fan 1 shown in FIG. 3 . In addition, the parts having the same structure as those of the centrifugal fan 1 in FIGS. 1 to 15 are given the same reference numerals, and description thereof will be omitted. The centrifugal fan 1D of the fifth embodiment is different from the centrifugal fan 1B of the third embodiment in the shape of the shielding wall portion 22 . Therefore, in the following description, using FIG. 16 , the shielding wall portion 24 of the centrifugal fan 1D according to the fifth embodiment will be described focusing on the differences from the shielding wall portion 22 of the centrifugal fan 1B according to the third embodiment.
（遮壁部24）
渦卷殼4係在葉輪2之徑向中，具有自喇叭口周壁31往內周緣部32b延伸之遮壁部24。遮壁部24係阻止自葉輪2流出之氣流，於再流入到葉輪2之方向上流動。(shield part 24)
The scroll casing 4 is located in the radial direction of the impeller 2 and has a shielding wall portion 24 extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b. The shielding wall portion 24 prevents the airflow flowing out from the impeller 2 from flowing in the direction of reflowing into the impeller 2 .
遮壁部24係被形成為板狀，遮壁部24的尖端部22a係在葉輪2之徑向中，與空氣取入部32相抵接。The shielding wall portion 24 is formed in a plate shape, and the tip portion 22 a of the shielding wall portion 24 is located in the radial direction of the impeller 2 and is in contact with the air intake portion 32 .
在此，於與旋轉軸RS之軸向平行之方向中，將遮壁部24與側板2c間之距離，當作距離D2。更詳細地說來，於與旋轉軸RS之軸向平行之方向中，將與葉輪2相向之遮壁部24的相向面22b與側板2c間之距離，當作距離D2。距離D2係被形成為小於周壁4c與側板2c間之距離。而且，距離D2係被形成為小於喇叭口周壁31與側板2c間之距離。Here, the distance between the shielding wall portion 24 and the side plate 2c in a direction parallel to the axial direction of the rotation shaft RS is defined as a distance D2. More specifically, the distance between the facing surface 22b of the shielding wall portion 24 facing the impeller 2 and the side plate 2c in a direction parallel to the axial direction of the rotating shaft RS is taken as the distance D2. The distance D2 is formed to be smaller than the distance between the peripheral wall 4c and the side plate 2c. Also, the distance D2 is formed to be smaller than the distance between the bell mouth peripheral wall 31 and the side plate 2c.
在實施形態5中，渦卷殼4係在沿著旋轉軸RS之剖面中，具有自喇叭口周壁31往內周緣部32b延伸之遮壁部24。而且，與喇叭口周壁31的第1側壁4a1側的端部與葉輪2的側板2c之位置關係無關地，遮壁部24的相向面22b與側板2c間之距離D2，係小於周壁4c與側板2c之距離及喇叭口周壁31與側板2c之距離。In the fifth embodiment, the scroll casing 4 has the shielding wall portion 24 extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b in a cross section along the rotation axis RS. Moreover, regardless of the positional relationship between the end of the first side wall 4a1 side of the bell mouth peripheral wall 31 and the side plate 2c of the impeller 2, the distance D2 between the facing surface 22b of the shielding wall portion 24 and the side plate 2c is smaller than that between the peripheral wall 4c and the side plate. 2c and the distance between the bell mouth peripheral wall 31 and the side plate 2c.
［離心風扇1D之作用效果］
遮壁部24係在葉輪2之徑向中，與空氣取入部32相抵接。因此，遮壁部24係與遮壁部22相比較下，抵接之位置係增加，所以，可確保強度大於遮壁部22。[Effect of Centrifugal Fan 1D]
The shielding wall portion 24 is located in the radial direction of the impeller 2 and abuts against the air intake portion 32 . Therefore, compared with the shielding wall portion 22 , the shielding wall portion 24 has an increased contact position, so that the strength can be ensured to be greater than that of the shielding wall portion 22 .
又，離心風扇1D係藉具有遮壁部24，其與具有遮壁部22之情形同樣地，可防止自葉輪2流出之氣流，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。Also, the centrifugal fan 1D is provided with the shielding wall portion 24, which, like the case with the shielding wall portion 22, can prevent the airflow flowing out from the impeller 2 from flowing into the impeller 2 again, and can suppress the airflow generated by the airflow at the same time. noise.
實施形態6.
〔離心風扇1E］
圖17係實施形態6之離心風扇1E之放大圖。圖17所示之離心風扇1E，係圖3所示之離心風扇1的範圍AR之部分之放大圖。而且，對於具有與圖1～圖16之離心風扇1等相同構成之部位，係賦予相同之編號，省略其說明。實施形態5之離心風扇1E，係實施形態3之離心風扇1B中之遮壁部22之形狀不同。因此，在以下之說明中，使用圖17，針對實施形態6之離心風扇1E的遮壁部25，以與實施形態3之離心風扇1B的遮壁部22不同之點為中心做說明。Implementation form 6.
[Centrifugal fan 1E]
Fig. 17 is an enlarged view of a centrifugal fan 1E of Embodiment 6. The centrifugal fan 1E shown in FIG. 17 is an enlarged view of a part of the range AR of the centrifugal fan 1 shown in FIG. 3 . In addition, the parts having the same configuration as those of the centrifugal fan 1 in FIGS. 1 to 16 are given the same reference numerals, and description thereof will be omitted. The centrifugal fan 1E of the fifth embodiment is different from the centrifugal fan 1B of the third embodiment in the shape of the shielding wall portion 22 . Therefore, in the following description, using FIG. 17 , the shielding wall portion 25 of the centrifugal fan 1E according to the sixth embodiment will be described centering on the differences from the shielding wall portion 22 of the centrifugal fan 1B according to the third embodiment.
（遮壁部25）
渦卷殼4係在葉輪2之徑向中，具有自喇叭口周壁31往內周緣部32b延伸之遮壁部25。遮壁部25係阻止自葉輪2流出之氣流，於再流入到葉輪2之方向上流動。遮壁部25係由發泡苯乙烯等之發泡材所形成。而且，遮壁部25係不侷限於由發泡材所形成。例如遮壁部25也可以由樹脂材料所形成，或者，由金屬材料所形成。(shield part 25)
The scroll casing 4 is located in the radial direction of the impeller 2 and has a shielding wall portion 25 extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b. The shielding wall portion 25 prevents the airflow flowing out from the impeller 2 from flowing in the direction of reflowing into the impeller 2 . The shielding wall portion 25 is formed of a foam material such as foamed styrene. Moreover, the shielding wall portion 25 is not limited to being formed of a foam material. For example, the shielding portion 25 may be formed of a resin material, or may be formed of a metal material.
而且，遮壁部25係可以藉一個構件構成，也可以組合兩個以上構件以構成。例如遮壁部25也可以藉發泡材、樹脂材料、或金屬材料，以一個構件構成。或者，遮壁部25也可以藉遮壁部22、及填充遮壁部22與空氣取入部32間之填充構件25a以構成。填充構件25a雖然期望與遮壁部22為相同構件，但是，其也可以係不同構件。填充構件25a係例如發泡材、樹脂材料、或金屬材料。In addition, the shielding wall part 25 may be comprised by one member, and may combine two or more members. For example, the shielding wall portion 25 may be constituted as a single member by a foam material, a resin material, or a metal material. Alternatively, the shielding wall portion 25 may also be constituted by the shielding wall portion 22 and the filling member 25 a filling the gap between the shielding wall portion 22 and the air intake portion 32 . The filling member 25a is desirably the same member as the shielding wall portion 22, but may be a different member. The filling member 25a is, for example, a foam material, a resin material, or a metal material.
如圖17所示，遮壁部25係在沿著旋轉軸RS之剖面中，被形成為塊狀。遮壁部25係在旋轉軸RS之軸向中，與空氣取入部32相抵接。又，如圖17所示，遮壁部25係被形成為在相對於旋轉軸RS而言，垂直之方向上延伸。遮壁部25的尖端部22a係在葉輪2之徑向中，與空氣取入部32相抵接。As shown in FIG. 17 , the shielding portion 25 is formed in a block shape in a cross section along the rotation axis RS. The shielding wall portion 25 is in contact with the air intake portion 32 in the axial direction of the rotation shaft RS. Moreover, as shown in FIG. 17, the shielding part 25 is formed so that it may extend in the direction perpendicular|vertical to the rotation axis RS. The tip portion 22 a of the shielding wall portion 25 is located in the radial direction of the impeller 2 and abuts against the air intake portion 32 .
在此，於與旋轉軸RS之軸向平行之方向中，將遮壁部25與側板2c間之距離，當作距離D2。更詳細地說來，於與旋轉軸RS之軸向平行之方向中，將與葉輪2相向之遮壁部25的相向面22b與側板2c間之距離，當作距離D2。距離D2係被形成為小於周壁4c與側板2c間之距離。而且，距離D2係被形成為小於喇叭口周壁31與側板2c間之距離。Here, the distance between the shielding wall portion 25 and the side plate 2c in a direction parallel to the axial direction of the rotation shaft RS is defined as a distance D2. More specifically, the distance between the facing surface 22b of the shielding wall portion 25 facing the impeller 2 and the side plate 2c in a direction parallel to the axial direction of the rotating shaft RS is taken as the distance D2. The distance D2 is formed to be smaller than the distance between the peripheral wall 4c and the side plate 2c. Also, the distance D2 is formed to be smaller than the distance between the bell mouth peripheral wall 31 and the side plate 2c.
在實施形態6中，渦卷殼4係在沿著旋轉軸RS之剖面中，具有自喇叭口周壁31往內周緣部32b延伸之遮壁部25。遮壁部25係填充由與葉輪2相向之側的喇叭口3所形成之空間。而且，與喇叭口周壁31的第1側壁4a1側的端部與葉輪2的側板2c之位置關係無關地，遮壁部25的相向面22b與側板2c間之距離D2，係小於周壁4c與側板2c之距離及喇叭口周壁31與側板2c之距離。In Embodiment 6, the scroll casing 4 has the shielding wall portion 25 extending from the bell mouth peripheral wall 31 to the inner peripheral edge portion 32b in a cross section along the rotation axis RS. The shielding wall portion 25 fills the space formed by the bell mouth 3 on the side facing the impeller 2 . Moreover, regardless of the positional relationship between the end of the first side wall 4a1 side of the bell mouth peripheral wall 31 and the side plate 2c of the impeller 2, the distance D2 between the facing surface 22b of the shielding wall portion 25 and the side plate 2c is smaller than that between the peripheral wall 4c and the side plate. 2c and the distance between the bell mouth peripheral wall 31 and the side plate 2c.
［離心風扇1E之作用效果］
遮壁部25係在旋轉軸RS之軸向中，與空氣取入部32相抵接。因此，如圖17所示，遮壁部25係在沿著旋轉軸RS之剖面中，被形成為塊狀。遮壁部25係與遮壁部23相比較下，在旋轉軸RS之軸向上具有厚度，藉此，可確保強度大於遮壁部23。[Effect of Centrifugal Fan 1E]
The shielding wall portion 25 is in contact with the air intake portion 32 in the axial direction of the rotation shaft RS. Therefore, as shown in FIG. 17 , the shielding portion 25 is formed in a block shape in a cross section along the rotation axis RS. Compared with the shielding wall portion 23 , the shielding wall portion 25 has a thickness in the axial direction of the rotation axis RS, thereby ensuring greater strength than the shielding wall portion 23 .
又，離心風扇1E係具有遮壁部25，藉此，其與具有遮壁部23之情形同樣地，可防止自葉輪2流出之氣流，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。Also, the centrifugal fan 1E has the shielding wall portion 25, whereby, like the case with the shielding wall portion 23, it can prevent the airflow flowing out from the impeller 2 from flowing into the impeller 2 again, and at the same time, it can suppress the flow caused by the airflow. the noise produced.
實施形態7.
［離心風扇1F］
圖18係實施形態7之離心風扇1F之剖面示意圖。圖18係概示渦卷殼4之剖面者。而且，對於具有與圖1～圖17之離心風扇1等相同構造之部位，係賦予相同之編號，省略其說明。相對於實施形態1之離心風扇1等，係自渦卷殼4的單側吸入空氣之單吸入型之風扇而言，實施形態7之離心風扇1F等，係自渦卷殼4的兩側吸入空氣之雙吸入型之風扇。Implementation form 7.
[Centrifugal fan 1F]
Fig. 18 is a schematic sectional view of a centrifugal fan 1F according to Embodiment 7. FIG. 18 is a schematic diagram of a section of the scroll casing 4. In addition, the parts having the same structure as those of the centrifugal fan 1 in FIGS. 1 to 17 are given the same reference numerals, and description thereof will be omitted. Compared with the centrifugal fan 1 etc. of Embodiment 1, which is a single-suction type fan which sucks in air from one side of the scroll casing 4, the centrifugal fan 1F of Embodiment 7 etc. sucks in air from both sides of the scroll casing 4. Air double suction fan.
離心風扇1F係在葉輪2F之虛擬之旋轉軸RS之軸向中，自渦卷殼4的兩側吸入空氣之雙吸入型之風扇。離心風扇1F係具有：葉輪2，產生氣流；以及渦卷殼4，收納葉輪2於內部。The centrifugal fan 1F is a double-suction fan that sucks air from both sides of the scroll casing 4 in the axial direction of the imaginary rotating shaft RS of the impeller 2F. The centrifugal fan 1F has: an impeller 2 for generating airflow; and a scroll casing 4 for accommodating the impeller 2 inside.
（葉輪2）
如圖18所示，葉輪2係具有：主板2a，呈圓盤狀；側板2c，呈環狀，與主板2a相向配置；以及複數扇葉2d，一端係被連接於主板2a，另一端係被連接於側板2c，排列於主板2a的周緣部2a1。(impeller 2)
As shown in Figure 18, the impeller 2 has: a main board 2a, which is disc-shaped; a side plate 2c, which is annular and arranged opposite to the main board 2a; and a plurality of fan blades 2d, one end of which is connected to the main board 2a, and the other end is It is connected to the side plate 2c and arranged on the peripheral portion 2a1 of the main plate 2a.
主板2a只要係板狀即可，其也可以係例如多角形等，圓盤狀以外之形狀。而且，主板2a並不侷限於以一塊板狀構件構成，其也可以一體固定複數塊板狀構件以被構成。The main plate 2a may be in the form of a plate, and may be in a shape other than a disc, such as a polygon. Moreover, the main board 2a is not limited to being constituted by one plate-shaped member, and may be constituted by integrally fixing a plurality of plate-shaped members.
複數扇葉2d係在旋轉軸RS之軸向中，被設於主板2a的兩側。同樣地，側板2c係在旋轉軸RS之軸向中，分別被設於主板2a的兩側。A plurality of fan blades 2d are arranged on both sides of the main board 2a in the axial direction of the rotating shaft RS. Similarly, the side plates 2c are arranged on both sides of the main plate 2a in the axial direction of the rotation shaft RS.
葉輪2係藉被配置於主板2a之複數扇葉2d，被構成為筒狀。而且，葉輪2係在旋轉軸RS之軸向中，於主板2a的相反側的側板2c側，形成有用於流入氣體到由主板2a與複數扇葉2d所圍成之空間47之吸入口2e。葉輪2係在構成主板2a之板面的兩側，分別配置有扇葉2d及側板2c，於構成主板2a之板面的兩側，形成有葉輪2的吸入口2e。The impeller 2 is configured in a cylindrical shape by a plurality of blades 2d arranged on the main plate 2a. Moreover, the impeller 2 is formed in the axial direction of the rotating shaft RS, on the side plate 2c side opposite to the main plate 2a, for inflowing gas into the space 47 surrounded by the main plate 2a and the plurality of fan blades 2d. Suction port 2e is formed. The impeller 2 is configured with fan blades 2d and side plates 2c on both sides of the plate surface constituting the main plate 2a, and a suction port 2e of the impeller 2 is formed on both sides of the plate surface constituting the main plate 2a.
（渦卷殼4）
渦卷殼4係收納離心風扇1F用之葉輪2F於內部，整流自葉輪2F被吹出之空氣。渦卷殼4係具有渦卷部41及吐出部42。(scroll shell 4)
The scroll casing 4 houses the impeller 2F of the centrifugal fan 1F inside, and rectifies the air blown out from the impeller 2F. The scroll casing 4 has a scroll portion 41 and a discharge portion 42 .
（渦卷部41）
渦卷部41係形成轉換葉輪2F所產生之氣流之動壓為靜壓之風路。渦卷部41係具有側壁4a及周壁4c。
（側壁4a）
側壁4a係在葉輪2F的旋轉軸RS之軸向中，被配置於葉輪2F的兩側。在渦卷殼4的側壁4a形成有吸入口5，使得空氣可流通在葉輪2F與渦卷殼4的外部之間。(Scroll 41)
The scroll portion 41 forms an air path that converts the dynamic pressure of the airflow generated by the impeller 2F into a static pressure. The scroll portion 41 has a side wall 4a and a peripheral wall 4c.
(side wall 4a)
The side walls 4 a are disposed on both sides of the impeller 2F in the axial direction of the rotation shaft RS of the impeller 2F. A suction port 5 is formed on a side wall 4 a of the scroll case 4 so that air can circulate between the impeller 2F and the outside of the scroll case 4 .
離心風扇1F係在渦卷殼4中，具有兩個側壁4a。兩個側壁4a係被形成為中介著周壁4c，分別相向。更詳細地說來，如圖18所示，渦卷殼4係側壁4a具有第1側壁4a1及第2側壁4a21。The centrifugal fan 1F is attached to the scroll casing 4 and has two side walls 4a. The two side walls 4a are formed to face each other with the peripheral wall 4c interposed therebetween. More specifically, as shown in FIG. 18, the side wall 4a of the scroll casing 4 has a first side wall 4a1 and a second side wall 4a21.
第1側壁4a1係沿著旋轉軸RS之軸向中之周壁4c的一邊的第1端部4c11以被形成。在第1側壁4a1形成有用於取入空氣之吸入口5，使得空氣可流通在葉輪2與渦卷殼4的外部之間。第2側壁4a21係沿著旋轉軸RS之軸向中之周壁4c的另一邊的第2端部4c12以被形成。在第2側壁4a21形成有用於取入空氣之吸入口5，使得空氣可流通在葉輪2與渦卷殼4的外部之間。離心風扇1F的渦卷殼4，係在葉輪2的旋轉軸RS之軸向中，係在主板2a的兩側，具有形成有吸入口5之側壁4a之雙吸入型之殼體。The first side wall 4a1 is formed along the first end portion 4c11 of one side of the peripheral wall 4c in the axial direction of the rotation shaft RS. A suction port 5 for taking in air is formed on the first side wall 4 a 1 so that air can flow between the impeller 2 and the outside of the scroll case 4 . The second side wall 4a21 is formed along the second end portion 4c12 of the other side of the peripheral wall 4c in the axial direction of the rotation shaft RS. A suction port 5 for taking in air is formed on the second side wall 4a21 so that air can flow between the impeller 2 and the outside of the scroll case 4 . The scroll casing 4 of the centrifugal fan 1F is in the axial direction of the rotating shaft RS of the impeller 2, and is on both sides of the main board 2a.
第1側壁4a1係具有形成連通到由主板2a與複數扇葉2d所形成之空間47之吸入口5之喇叭口3。被設於第1側壁4a1之吸入口5，如圖18所示，係由喇叭口3所形成。同樣地，第2側壁4a21係具有形成連通到由主板2a與複數扇葉2d所形成之空間47之吸入口5之喇叭口3。被設於第2側壁4a21之吸入口5，如圖18所示，係由喇叭口3所形成。The first side wall 4a1 has the bell mouth 3 forming the suction port 5 connected to the space 47 formed by the main board 2a and the plurality of fan blades 2d. The suction port 5 provided on the first side wall 4a1 is formed by the bell mouth 3 as shown in FIG. 18 . Similarly, the second side wall 4a21 has the bell mouth 3 forming the suction port 5 connected to the space 47 formed by the main board 2a and the plurality of fan blades 2d. The suction port 5 provided on the second side wall 4a21 is formed by the bell mouth 3 as shown in FIG. 18 .
（遮壁部20）
渦卷殼4係在旋轉軸RS之軸向中，於主板2a的兩側分別具有遮壁部20。亦即，遮壁部20係具有：第1遮壁部27，被配置於第1側壁4a1側；以及第2遮壁部28，被配置於第2側壁4a21側。(shield part 20)
The scroll casing 4 is in the axial direction of the rotating shaft RS, and has shielding wall portions 20 on both sides of the main plate 2a. That is, the shielding wall part 20 has the 1st shielding wall part 27 arrange|positioned at the 1st side wall 4a1 side, and the 2nd shielding wall part 28 arrange|positioned at the 2nd side wall 4a21 side.
［離心風扇1F之作用效果］
離心風扇1F係藉具有第1遮壁部27及第2遮壁部28，即使係雙吸入型之風扇，也可與具有遮壁部20之情形同樣地，可以抑制自葉輪2流出之氣流，再流入到葉輪2之情事，同時可抑制由氣流所產生之噪音。[Effect of Centrifugal Fan 1F]
The centrifugal fan 1F has the first shielding wall portion 27 and the second shielding wall portion 28. Even if it is a double-suction fan, it can suppress the airflow flowing out from the impeller 2 as in the case of having the shielding wall portion 20. When it flows into the impeller 2, the noise generated by the airflow can be suppressed at the same time.
實施形態8.
［空調裝置60］
圖19係概示實施形態8之空調裝置60一例之前側視圖。圖20係概示實施形態8之空調裝置60一例之立體圖。而且，圖19及圖20係為了說明空調裝置60的內部構造，透過框體61而表示內部構造。又，對於具有與圖1～圖18之離心風扇1等相同構成之部位，係賦予相同之編號，省略其說明。Implementation form 8.
[Air conditioner 60]
Fig. 19 is a front side view schematically showing an example of an air conditioner 60 according to the eighth embodiment. Fig. 20 is a perspective view schematically showing an example of an air conditioner 60 according to the eighth embodiment. 19 and 20 show the internal structure through the frame body 61 in order to explain the internal structure of the air conditioner 60 . In addition, the parts having the same configuration as those of the centrifugal fan 1 in FIGS. 1 to 18 are given the same reference numerals, and description thereof will be omitted.
實施形態8之空調裝置60係包括：離心風扇1～離心風扇1F之任一者以上；熱交換器10，被配置於與離心風扇1等的吐出口42a相向之位置；以及框體61，收納離心風扇1及熱交換器10。而且，在以下之說明中，表示離心風扇1之情形，係當作離心風扇1～離心風扇1F之任一者。實施形態8之空調裝置60，係地板放置型之空調裝置60，但是，空調裝置60並不侷限於地板放置型者。例如空調裝置60可以係天花板設置型之空調裝置60，也可以係壁掛型之空調裝置60。The air conditioner 60 of the eighth embodiment includes: any one or more of the centrifugal fan 1 to the centrifugal fan 1F; the heat exchanger 10 is arranged at a position facing the outlet 42a of the centrifugal fan 1; Centrifugal fan 1 and heat exchanger 10. In addition, in the following description, the case where the centrifugal fan 1 is shown is regarded as any one of the centrifugal fan 1 to the centrifugal fan 1F. The air conditioner 60 of the eighth embodiment is a floor-mounted air-conditioner 60, however, the air-conditioner 60 is not limited to the floor-mounted type. For example, the air conditioner 60 may be a ceiling-mounted air conditioner 60 or a wall-mounted air conditioner 60 .
框體61係具有前表面部61a、背面部61b、頂面部61c、底面部61d、左側面部61e及右側面部61f，被形成為長方體狀。而且，管體61之形狀係並不侷限於長方體狀，例如也可以係圓柱狀、四角柱狀、圓錐狀、具有複數角部之形狀、具有複數曲面部之形狀等之其他形狀。The frame body 61 has a front surface part 61a, a back surface part 61b, a top surface part 61c, a bottom surface part 61d, a left side part 61e, and a right side part 61f, and is formed in the shape of a cuboid. Moreover, the shape of the pipe body 61 is not limited to a rectangular parallelepiped, for example, it can also be cylindrical, quadrangular, conical, with multiple corners, with multiple curved surfaces, and other shapes.
在左側面部61e及右側面部61f之任一者或兩者，形成有用於流入空氣到框體61內之吸入口61g。吸入口61g係例如在上下方向上較長之長形開口。吸入口61g只要係被形成於與離心風扇1的旋轉軸RS之軸向垂直之位置即可，例如也可以在前表面部61a或背面部61b形成有吸入口61g。圖20所示之吸入口61g係一例，吸入口61g之位置、大小及形狀等，並不侷限於圖20之構造。於吸入口61g也可以配置有去除空氣中的塵埃之過濾器。Either one or both of the left side surface 61e and the right side surface 61f are formed with a suction port 61g through which air flows into the housing 61 . The suction port 61g is, for example, an elongated opening that is long in the vertical direction. The suction port 61g should just be formed in the position perpendicular to the axial direction of the rotation shaft RS of the centrifugal fan 1, For example, the suction port 61g may be formed in the front surface part 61a or the back surface part 61b. The suction port 61g shown in FIG. 20 is an example, and the position, size and shape of the suction port 61g are not limited to the structure shown in FIG. 20 . A filter for removing dust in the air may also be arranged at the suction port 61g.
在前表面部61a的上部，形成有通過熱交換器10，以進行熱交換之空氣流出之吹出口63。吹出口63係例如矩形之開口。在此吹出口63設有控制風向之複數葉片67。葉片67之構造，係可調整風向往上下方向及左右方向。In the upper part of the front surface part 61a, the air outlet 63 through which the air which performs heat exchange flows out through the heat exchanger 10 is formed. The outlet 63 is, for example, a rectangular opening. The air outlet 63 is provided with a plurality of blades 67 for controlling the wind direction. The structure of the blade 67 can adjust the wind direction to the up-down direction and the left-right direction.
框體61的內部係形成有：第1空間64，配置有離心風扇1；以及第2空間65，配置有熱交換器10。第1空間64及第2空間65係被分隔板62所分隔。離心風扇1係被安裝於分隔板62。The inside of the housing 61 is formed with a first space 64 in which the centrifugal fan 1 is arranged, and a second space 65 in which the heat exchanger 10 is arranged. The first space 64 and the second space 65 are partitioned by the partition plate 62 . The centrifugal fan 1 is attached to the partition plate 62 .
第1空間64係透過吸入口61g，而與框體61的外部相連通之空間，其係離心風扇1的吸入側的空間。第2空間65係透過吹出口63，而與框體61的外部相連通之空間，其係離心風扇1的吹出側的空間。第1空間64與第2空間65，係透過離心風扇1而相連通。離心風扇1的葉輪2係形成空氣自吸入口61g被吸入框體61內，自吹出口63往空調對象空間被吹出之流動。The first space 64 is a space communicating with the outside of the housing 61 through the suction port 61g, and is a space on the suction side of the centrifugal fan 1 . The second space 65 is a space communicating with the outside of the frame body 61 through the air outlet 63 , and is a space on the air outlet side of the centrifugal fan 1 . The first space 64 and the second space 65 communicate through the centrifugal fan 1 . The impeller 2 of the centrifugal fan 1 forms a flow in which air is sucked into the frame 61 from the suction port 61g and blown out from the air outlet 63 to the space to be air-conditioned.
熱交換器10係被配置於與離心風扇1的吐出口42a相向之位置，在框體61的第2空間65中，被配置於離心風扇1所吐出之空氣之風路上。熱交換器10係調整自吸入口61g被吸入框體61內，自吹出口63往空調對象空間被吹出之空氣之溫度。而且，熱交換器10係可適用眾所周知之構造者。The heat exchanger 10 is arranged at a position facing the discharge port 42 a of the centrifugal fan 1 , and is arranged in the air path of the air discharged from the centrifugal fan 1 in the second space 65 of the housing 61 . The heat exchanger 10 adjusts the temperature of the air sucked into the frame 61 from the suction port 61g and blown out from the air outlet 63 to the space to be air-conditioned. Moreover, the heat exchanger 10 can apply a well-known structure.
［空調裝置60之動作例］
藉圖3所示之驅動裝置6之驅動，當葉輪2旋轉時，空調對象空間之空氣，係通過吸入口61g以被吸入框體61的內部。被吸入框體61的內部之空氣，係被喇叭口3所導引，被葉輪2吸入。被葉輪2吸入後之空氣，係往葉輪2的徑向外側被吹出。自葉輪2被吹出之空氣，係在通過渦卷殼4的內部後，自渦卷殼4的吐出口42a被吹出，被供給到熱交換器10。被供給到熱交換器10之空氣，係在通過熱交換器10時，在與流動在熱交換器10內之冷媒之間，進行熱交換，進行調整溫度及濕度。通過熱交換器10後之空氣，係自吹出口63往空調對象空間被吹出。[Operation example of the air conditioner 60 ]
Driven by the driving device 6 shown in FIG. 3 , when the impeller 2 rotates, the air in the air-conditioned space is drawn into the frame body 61 through the suction port 61g. The air sucked into the frame body 61 is guided by the bell mouth 3 and sucked by the impeller 2 . The air sucked by the impeller 2 is blown out radially outward of the impeller 2 . The air blown out from the impeller 2 passes through the inside of the scroll case 4 , is blown out from the discharge port 42 a of the scroll case 4 , and is supplied to the heat exchanger 10 . When the air supplied to the heat exchanger 10 passes through the heat exchanger 10, it exchanges heat with the refrigerant flowing in the heat exchanger 10 to adjust the temperature and humidity. The air passing through the heat exchanger 10 is blown out from the air outlet 63 to the space to be air-conditioned.
〔空調裝置60之作用效果］
實施形態8之空調裝置60，係包括實施形態1之離心風扇1等，所以，可獲得與實施形態1之離心風扇1等同樣之效果。因此，空調裝置60係例如可抑制由離心風扇1內的氣流所產生之噪音。[Effects of the air conditioner 60]
The air conditioner 60 of the eighth embodiment includes the centrifugal fan 1 and the like of the first embodiment, so the same effects as those of the centrifugal fan 1 and the like of the first embodiment can be obtained. Therefore, the air conditioner 60 can suppress the noise generated by the air flow in the centrifugal fan 1, for example.
上述各實施形態1～8，係可彼此組合以實施之。又，以上之實施形態所示之構造，僅係表示一例，其也可以與其他眾所周知之技術組合，在不脫逸要旨之範圍內，也可以省略或變更構造的一部份。The above-mentioned embodiments 1 to 8 can be implemented in combination with each other. In addition, the structure shown in the above embodiment is only an example, it can also be combined with other well-known techniques, and a part of structure can also be omitted or changed within the range which does not deviate from the gist.
