JP6295414B2 - Blower and outdoor unit equipped with the blower - Google Patents

Description

  The present invention relates to an air blower, particularly one mounted on an outdoor unit of a refrigeration apparatus such as an air conditioner or a heat pump type water heater.

  In recent years, in refrigeration apparatuses such as air conditioners, energy saving is rapidly progressing as a countermeasure against global warming, and reduction of input of equipment is demanded. Moreover, in order to improve the heating comfort of the air conditioner, it is indispensable to improve the performance of the heat exchanger of the outdoor unit, reduce the noise of the blower mounted on the outdoor unit, and increase the air volume.

  Conventionally, axial blowers or mixed flow blowers have been used for outdoor unit blowers from the viewpoint of low noise and large air flow, but the blower performance of the blower while maintaining low noise as an outdoor unit. There is a demand for further improvement.

  As a technique for reducing the noise and increasing the air volume of such a blower, a static pressure recovery vane (static blade) that converts the dynamic pressure energy of the air flow into static pressure energy and recovers it downstream of the propeller fan (blower) ) (For example, see Patent Document 1).

  FIG. 9 shows a conventional outdoor unit described in Patent Document 1. In FIG. In FIG. 9, the outdoor unit 101 includes a propeller fan 105, a mouth ring 106 provided on the outer periphery of the propeller fan 105, and a static pressure collection vane 107 provided inside the mouth ring 106 on the discharge side of the propeller fan 105. ing.

  The mouth ring 106 is located on the rear edge side of the propeller fan 105 and guides the air flow blown out, and an enlarged air outlet 106A having a larger diameter than the front part is formed at the rear part of the mouth ring 106. . The static pressure recovery vane 107 is located downstream from the rear edge of the propeller fan 105. The chord length of the static pressure recovery vane 107 is formed so as to increase from the center toward the outer periphery.

  In the outdoor unit configured as described above, the static air flow collecting vane 107 collects the swirling flow that causes energy loss in the circumferential direction as a static pressure, thereby increasing the axial air flow rate. Further, since the swirl flow from the propeller fan 105 can be decelerated by the static pressure recovery vane 107, noise can be reduced.

JP 2000-130799 A

  However, in a rotating blade (blade) of a blower used in a conventional outdoor unit or the like, a horizontal portion exists at the front edge or the rear edge of the fixed blade depending on the mounting angle and shape of the fixed blade. When such a horizontal part exists, there existed the following subjects.

When a blower equipped with fixed blades is installed outdoors or in a refrigerated warehouse, for example, snow and frost accumulated on the top of the blower and its peripheral members are exposed to sunlight under conditions where the ambient temperature is below the freezing point, such as in severe winter. If it can be melted, etc., water droplets may be transmitted to the fixed blades as snow melting water. And this water droplet may accumulate on the horizontal part of a fixed blade | wing, and water may freeze again and it may grow on an icicle. When the growth of icicles goes from the leading edge of the fixed blade toward the windward side, it interferes with the moving blades, which causes problems such as generating abnormal noise or stopping or breaking the moving blades. Such a problem becomes a problem particularly when a blower is provided in equipment installed outdoors such as an outdoor unit.

  The present invention solves the above-described conventional problems, and in an axial flow or mixed flow type blower used for an outdoor unit of an air conditioner or a heat pump water heater, abnormal noise is generated due to the generation or growth of ice. Also, the purpose is to prevent the blades from being stopped or damaged. In addition, in an outdoor unit equipped with a blower, it prevents the generation of abnormal noise due to the generation and growth of ice, and the stop and breakage of moving blades.

  In order to solve the above-described conventional problems, the blower of the present invention includes a moving blade and a stationary blade, and the stationary blade has a space between fixed blades provided in a region where the leading edge is located below the trailing edge. The front edge is larger than the interval between the fixed blades provided in the region located above the rear edge.

  By adopting such a configuration, water droplets can easily collect, the horizontal part that is the starting point of ice generation and growth can be reduced, abnormal noise can be generated due to ice generation and growth, and the blade can be stopped or damaged. And the swirl direction component can be efficiently recovered to static pressure.

  The blower of the present invention can prevent the generation and growth of ice. Further, the outdoor unit equipped with the blower of the present invention does not generate abnormal noise due to the generation or growth of ice, or stop or break the moving blade.

The meridional sectional view of the blower in Embodiment 1 of the present invention The front view seen from the discharge side of the air blower in the embodiment FIG. 1 is a diagram showing the relationship between the discharge airflow from the moving blade and the mounting angle of the stationary blade in the a) AA section, b) BB section, and c) CC section of FIG. The figure which shows the relationship between the radial direction position of a fixed blade | wing and blade | wing attachment angle in the same embodiment The principal part perspective view of the connection part of the fixed blade | wing and support frame in the embodiment Front view from the discharge side of the blower for comparison Cross-sectional view of an outdoor unit equipped with a blower in the same embodiment The front view seen from the discharge side of the air blower in Embodiment 2 of this invention Longitudinal sectional view of an outdoor unit of a conventional air conditioner

  According to a first aspect of the present invention, there is provided a moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, and provided on a discharge side of the moving blade, around the fixed hub and the fixed hub. A stationary blade having a plurality of fixed blades provided, wherein the stationary blade has an interval between the fixed blades provided in a region where the front edge of the fixed blade is located below the rear edge. The front edge is larger than the interval between the fixed blades provided in the region located above the rear edge.

By setting it as this structure, the location where a water droplet tends to collect from the fixed blade | wing of the area | region where water flows in the direction of a moving blade can be reduced. As a result, snow and frost accumulated on the upper part of the blower and its peripheral members are melted by solar radiation and transmitted to the fixed blades, and the snow melted water re-freezes and the ice pillars grow and accumulate on the fixed blades. It is possible to prevent the ice column from growing toward the windward side of the fixed blade from the water droplets. For this reason, it is possible to prevent the icicle from interfering with the moving blades to generate abnormal noise or to stop or break the moving blades.

  According to a second aspect of the present invention, there is provided a moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, and provided on the discharge side of the moving blade, around the fixed hub and the fixed hub. A stationary blade having a plurality of fixed blades provided, and the shape of at least one fixed blade provided in a region where the front edge of the fixed blade is located below the rear edge is the front edge of the fixed blade. Is different from the shape of the fixed blade provided in the region located above the rear edge, and does not provide a horizontal portion from the central portion to the outer peripheral end of the fixed blade.

  By adopting such a configuration, it is possible to reduce the horizontal portion where water droplets are likely to collect from the fixed blade in the region where water flows in the direction of the moving blade. As a result, snow and frost accumulated on the upper part of the blower and its peripheral members are melted by solar radiation and transmitted to the fixed blades, and the snow melted water re-freezes and the ice pillars grow and accumulate on the fixed blades. It is possible to prevent the ice column from growing toward the windward side of the fixed blade from the water droplets. For this reason, it is possible to prevent the icicle from interfering with the moving blades to generate abnormal noise or to stop or break the moving blades.

  According to a third invention, in the first or second invention, the plurality of fixed blades are formed such that at least one of the front edge or the rear edge is curved, and among the plurality of fixed blades, the front edge is the rear edge. The fixed vane that is further below and at least a part of the outer peripheral end is below the fixed hub side end is provided with the outer peripheral end of the fixed vane below the central portion of the fixed vane.

  By adopting such a configuration, it is possible to eliminate a horizontal portion where water droplets easily collect on the fixed blade.

  4th invention is the 1st or 2nd invention. WHEREIN: The fixed blade | wing whose front edge is below a rear edge is comprised in the same shape as the fixed blade | wing which has a front edge above a rear edge among several fixed blades. Then, at least a part of the central portion of the fixed blade does not include the fixed blade that is positioned below the outer peripheral end of the fixed blade.

  By adopting such a configuration, it is possible to prevent water droplets from accumulating on the fixed blade while minimizing the decrease in the number of the stationary blades and maintaining the maximum effect of the stationary blades.

  According to a fifth invention, in the second invention, the fixed blade not provided with a horizontal portion is a fixed blade whose front edge is below the rear edge, among the plurality of fixed blades, and whose front edge is above the rear edge. When configured in the same shape as the blade, at least a part of the central portion of the fixed blade is a fixed blade that is positioned below the outer peripheral end of the fixed blade.

  By adopting such a configuration, it is possible to prevent water droplets from accumulating on the fixed blades while minimizing the number of fixed blades having different shapes and maximizing the effect of the stationary blades.

  In a sixth aspect based on the second aspect, the mounting angle of the fixed blade not provided with the horizontal portion is the same as the mounting angle of the other fixed blade.

  By adopting such a configuration, it is possible to prevent water droplets from accumulating on the fixed blades while minimizing the performance degradation accompanying the change in shape of the fixed blades.

7th invention is the outdoor unit which mounts the air blower of any one invention of 1st-6th. With this configuration, snow and frost accumulated on the upper part of the outdoor unit are melted by solar radiation and transmitted to the fixed blades of the blower, and the snow melts re-freeze to grow ice pillars. It is possible to prevent water droplets from collecting on the fixed blade in the region where water flows in the direction of the blade. As a result, it is possible to prevent an icicle from growing toward the windward side of the fixed blade, interfering with the moving blade, generating abnormal noise, and stopping or damaging the moving blade.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.
(Embodiment 1)
FIG. 1 is a meridional sectional view of a blower according to Embodiment 1 of the present invention. Here, the meridional sectional view is a sectional view obtained by rotationally projecting the rotating blade of the moving blade or the fixed blade of the stationary blade on a plane including the rotating shaft of the moving blade or the central axis of the stationary blade. FIG. 2 is a front view seen from the discharge side of the blower in the embodiment of the present invention.

  As shown in FIGS. 1 and 2, the blower 1 includes a rotating hub 3 attached to a rotating shaft 2 and a moving blade 5 having two rotating blades 4 provided around the rotating hub 3. . A stationary blade 8 having a fixed hub 6 and eleven fixed blades 7 provided around the fixed hub 6 is provided on the discharge side (downstream side) of the moving blade 5. A predetermined gap is maintained between the moving blade 5 and the stationary blade 8 at a position corresponding to the outer periphery on the discharge side of the moving blade 5 and the outer periphery on the suction side (upstream side) of the stationary blade 8, and an orifice 9 is provided. .

  Such a blower 1 is installed and used so that the rotating shaft 2 is parallel to the ground.

  As shown in FIG. 2, the stationary blade 8 is configured such that the front edge 71 of the fixed blade 7 is upstream of the rear edge 72 of the fixed blade 7 in the rotation direction of the moving blade 5. For this reason, when the blower 1 is viewed from the discharge side, the front edge 71 of the fixed blade 7 is positioned above the rear edge 72 in the region on the right side of the fixed hub 6, and the region on the left side of the fixed hub 6. Then, the front edge 71 is positioned below the rear edge 72. That is, in the region on the right side of the fixed hub 6, the fixed blade 7 is inclined downward from the windward side toward the leeward side, and in the region on the left side of the fixed hub 6, the fixed blade 7 is inclined upward from the windward side to the leeward side. It becomes.

  Further, in the region substantially below the rotating shaft 2, the outer peripheral end 7 b of the front edge 71 or the rear edge 72 is positioned below the fixed hub side end 7 a of the same fixed blade 7. As will be described later, the outer peripheral end 7b of the fixed blade 7 is provided so as to be positioned (offset) in the counter-rotating direction of the moving blade 5 from the fixed hub side end 7a. For this reason, the region where the outer peripheral end 7b of the front edge 71 or the rear edge 72 is located below the fixed hub side end 7a of the same fixed blade 7 is the distance obtained by offsetting the outer peripheral end 7b to the height of the rotary shaft 2. Below the added height.

  As shown in FIG. 2, the 11 fixed blades 7 of the stationary blade 8 are all configured in the same shape. However, in the region on the left side of the fixed hub 6 as viewed from the direction in which the rotating direction of the rotor blade 5 is clockwise, the interval (pitch) between the fixed blades 7 is larger than the region on the right side of the fixed hub 6.

  More specifically, the stationary blade 8 is located in a region (region X1 surrounded by a broken line in FIG. 2) on the left side of the fixed hub 6 and the center in the vertical direction when viewed from the direction in which the rotating direction of the moving blade 5 is clockwise. The fixed blades 7 are provided with eleven fixed blades 7 so that the interval (pitch) between the fixed blades 7 is large and the other regions have the same interval (equal pitch).

  The pitch of the fixed blades 7 adjacent to the region X1 is three times the pitch of the fixed blades 7 in other regions. That is, if the fixed blades 7 are disposed in the region X1 at the same pitch as the fixed blades 7 provided in the region other than the region X1, two fixed blades 7 are disposed in the region X1.

  A front edge (suction side edge) 71 of the fixed blade 7 is linearly formed from a fixed hub side end 7a which is an end on the fixed hub 6 side to an outer peripheral end 7b which is an end on the outer peripheral side. Further, the trailing edge (ejection-side edge) 72 has a curved shape from the fixed hub side end 7a to the outer peripheral end 7b. The rear edge 72 has a curved shape in which the central portion is recessed in the direction of the front edge 71.

  The stationary blade 8 is a region (indicated by a broken line in FIG. 2) in which the front edge 71 is below the rear edge 72 and at least a part of the outer peripheral end 7b is below the fixed hub side end 7a. The fixed blade 7 that is located in the enclosed region X2) is provided with the outer peripheral end 7b of the fixed blade 7 below the central portion 7m of the same fixed blade 7.

  That is, among the plurality of fixed blades 7, the front edge 71 is located below the rear edge 72, and at least a part of the outer peripheral end 7b is located in a region (region X2 in FIG. 2) located below the fixed hub side end 7a. The fixed blade 7 to be provided does not include a portion (horizontal portion) that is horizontal to the ground at the front edge 71 or the rear edge 72.

  In other words, if the stationary blade 8 is disposed in the region X1 at the same pitch as the stationary blade 7 provided in a region other than the region X1, the stationary blade 8 is at least of the central portion 7m of the stationary blade 7. A part of the fixed blade 7 is configured to be in a state excluding the fixed blade 7 which is positioned below the outer peripheral end 7b.

  The rotating shaft 2 is provided on the suction side of the moving blade 5 and is connected to a driving shaft of a motor 10 that rotationally drives the moving blade 5. Since the motor 10 and the orifice 9 are both supported by a housing (not shown), the relative positions of the moving blade 5 and the orifice 9 are adjusted and held. Further, the fixed blade 7 is supported by the housing via the support frame 11, so that the relative positions of the stationary blade 8 and the orifice 9 are adjusted and held. The support frame 11 is a substantially annular member provided on the outer peripheral side of the stationary blade 8 and is formed integrally with the stationary blade 8.

  The rotating hub 3 of the moving blade 5 has a cylindrical shape or a truncated cone shape whose diameter increases toward the discharge side. The axial length of the rotating hub 3 is the meridian height at the center of the rotating blade 4 (the axial length when the rotating blade 4 of the moving blade 5 is rotationally projected onto a plane including the rotating shaft 2 of the moving blade 5. A) It is configured to be shorter than h1.

  The stationary hub 6 of the stationary blade 8 has a cylindrical shape, and the outer diameter thereof is the same as the diameter at the discharge-side end face of the rotating hub 3 (that is, the largest diameter of the rotating hub 3). The axial length of the fixed hub 6 is shorter than that of the rotating hub 3. The axial length of the fixed hub 6 is the meridian height of the fixed blade 7 (the axial length when the fixed blade 7 of the stationary blade 8 is rotationally projected onto a plane including the central axis of the stationary blade 8) h2. Is almost the same.

  The outer diameter of the stationary blade 8 is larger than the outer diameter of the moving blade 5, that is, the radial length of the fixed blade 7 is longer than the radial length of the rotating blade 4.

  The orifice 9 includes a minimum diameter portion 9x. In the minimum diameter portion 9x, the gap between the rotor blade 5 and the outer peripheral end of the rotary blade 4 is minimized. In FIG. 1, the minimum diameter portion 9x is formed of a cylindrical surface having a straight portion extending in the axial direction with a constant diameter. However, the minimum diameter portion 9x is configured as a constant diameter circumference without the straight portion. May be. The diameter of the orifice 9 increases from the minimum diameter portion 9x to the discharge side, and a discharge side opening 9y is formed at the end on the discharge side. In addition, the diameter of the orifice 9 increases from the minimum diameter portion 9x to the suction side, and a suction side opening 9z is formed at the end on the suction side.

  The position of the moving blade 5 in the axial direction is adjusted so that the outer peripheral end of the rear edge (discharge-side edge) of the rotary blade 4 faces the minimum diameter portion 9 x of the orifice 9. The moving blade 5 is positioned such that the discharge side end of the rotary hub 3 faces the minimum diameter portion 9x of the orifice 9, or between the minimum diameter portion 9x of the orifice 9 and the discharge side opening 9y. Thus, the position in the axial direction is adjusted.

  The position of the stationary blade 8 in the axial direction is adjusted such that the outer peripheral end of the front edge 71 of the fixed blade 7 is located between the minimum diameter portion 9x of the orifice 9 and the discharge side opening 9y. Further, the stationary blade 8 is provided so as to form a predetermined gap S between the outer peripheral end on the front edge side of the fixed blade 7 and the orifice 9. Since the outer diameter of the stationary blade 8 is larger than the outer diameter of the moving blade 5 and the diameter of the orifice 9 increases toward the discharge side, the clearance S is formed at the outer peripheral end of the trailing edge of the rotating blade 4 of the moving blade 5. And the gap between the minimum diameter portion 9x of the orifice 9 and substantially the same. The stationary blade 8 is adjusted in the axial direction so that the suction side end of the fixed hub 6 is positioned between the minimum diameter portion 9x of the orifice 9 and the discharge side opening 9y.

  Here, the shape of the fixed blade 7 of the stationary blade 8 will be described in detail. As shown in FIG. 1, the height (meridional surface height) h2 of the fixed blade 7 on the meridian surface is configured to be substantially constant from the end (fixed hub side end) 7a on the fixed hub 6 side to the outer peripheral end 7b. Has been. Further, as shown in FIG. 2, the front edge 71 of the fixed blade 7 on the surface perpendicular to the rotating shaft 2 of the moving blade 5 has an outer peripheral end 7b with respect to the fixed hub side end 7a. Are inclined so as to be positioned in the counter-rotating direction.

  3A is the same on the hub side (A-A cross section in FIG. 1), b) outer peripheral side (BB cross section in FIG. 1), and c) outer peripheral end (CC cross section in FIG. 1). It is a figure which shows the cross-sectional shape of the rotary blade 4 and the fixed blade 7 in the cross section in a radial position, and the relationship between the air flow discharged from the moving blade 5, and the blade attachment angle of the fixed blade 7. FIG. 4 is a diagram showing the relationship between the radial position of the fixed blade 7 and the blade mounting angle.

  As shown in FIG. 3, the rotary blade 4 has an arc shape or a wing-like cross section that is convex in the counter-rotating direction of the moving blade 5, and the rotary shaft 2 so that the trailing edge is located on the discharge side. The rotary hub 3 is fixed to the rotating hub 3 at an angle. The fixed blade 7 has an arc shape or a blade-shaped cross section that is convex in the rotation direction of the moving blade 5, and is a surface perpendicular to the central axis of the fixed hub 6 so that the leading edge is located on the suction side. Is fixed to the fixed hub 6 with a blade mounting angle θ that is inclined with respect to. Here, the blade attachment angle θ is an angle formed by a straight line connecting the front edge 71 and the rear edge 72 of the fixed blade 7 and a horizontal plane perpendicular to the central axis of the fixed hub 6, and is perpendicular to the central axis of the fixed hub 6. The angle increases from the horizontal plane toward the suction side or the counter-rotation direction side of the rotor blade 5.

  The blade attachment angle θ of the fixed blade 7 is configured to vary depending on the position of the fixed blade 7 in the radial direction.

  As shown in FIGS. 3 and 4, at the end where the fixed blade 7 and the fixed hub 6 are in contact (fixed hub side end 7a), the blade mounting angle θa is minimum. Then, the blade attachment angle θ increases as it goes to the outer peripheral side in the radial direction of the fixed blade 7, and becomes the blade attachment angle θm at the central portion 7 m of the fixed blade 7. As it goes further to the outer peripheral side than the central portion 7m, the blade attachment angle θ further increases, and becomes the maximum (blade attachment angle θb) between the central portion 7m and the outer peripheral end 7b of the fixed blade 7. Further on the outer peripheral side than the position where the blade attachment angle θb is reached, the blade attachment angle θ gradually decreases and becomes the blade attachment angle θc at the outer peripheral end 7 b of the fixed blade 7. The blade attachment angle θc is larger than the blade attachment angle θa at the fixed hub side end 7a and smaller than the blade attachment angle θm at the center portion 7m.

That is, the blade attachment angle θbc on the outer peripheral side from the central portion 7m is larger than the blade attachment angle θab on the fixed hub 6 side from the central portion 7m. In addition, on the outer peripheral side from the central portion 7 m, the blade mounting angle θ
b is maximized.

  The meridional height of the fixed blade 7 is substantially constant regardless of the position in the radial direction, and the blade mounting angle θ of the fixed blade 7 varies depending on the position in the radial direction. The curvature of the arc is the smallest at the fixed hub side end 7a in contact with 6, and the curvature of the arc is maximized between the central portion 7m and the outer peripheral end 7b. Further, the curvature of the arc at the outer peripheral end 7b is larger than the curvature of the arc at the fixed hub side end 7a and smaller than the curvature of the arc at the center portion 7m. Further, the curvature of the arc on the outer peripheral side from the center portion 7m is larger than the curvature of the arc on the fixed hub 6 side from the center portion 7m.

  Next, the shape of the connection portion between the stationary blade 7 of the stationary blade 8 and the support frame 11 will be described in detail. FIG. 5 is a perspective view of a main part of the connecting portion between the stationary blade 7 of the stationary blade 8 and the support frame 11 as viewed from the rear edge side of the stationary blade 7. As shown in FIG. 5, the outer peripheral end 7 b of the fixed blade 7 is provided with a plate-like extension 12 that extends the fixed blade 7 in the radial direction only on the rear edge side of the fixed blade 7. One surface of the extension portion 12 (the surface on the concave side of the fixed blade 7) is formed with the same curvature as the concave side of the arc of the fixed blade 7, while the back surface is parallel to the central axis of the fixed hub 6. It is formed with. For this reason, the thickness of the extension 12 is the same as the thickness of the fixed blade 7 on the rear edge side, but is formed so as to increase toward the front edge side. Further, the length (the meridional section height) of the extension 12 in the central axis direction is formed to be shorter than the length of the leg 13 described later in the central axis direction. Further, the height of the meridional section of the extension 12 is formed to be substantially constant regardless of the position in the radial direction.

  On the other hand, the support frame 11 is provided with leg portions 13 projecting toward the discharge side. The leg portion 13 is a plate-like member having both surfaces formed in parallel with the central axis of the fixed hub 6, and the thickness of the leg portion 13 is the same as the thickness of the fixed blade 7. Further, the length of the leg portion 13 in the central axis direction is formed to be shorter than the meridional surface height h2 of the fixed blade 7. Further, the leg portion 13 is provided so as to support the fixed blade 7 at a radial position on the outer peripheral side from the discharge side opening 9 y of the orifice 9.

  Then, by joining the outer peripheral side end of the extension part 12 and the fixed hub 6 side end part of the leg part 13, a predetermined gap T is formed between the front edge side of the fixed blade 7 and the support frame 11. , Supported by the support frame 11. In addition, it is desirable that the fixed blade 7, the extension portion 12, the leg portion 13, and the support frame 11 are integrally formed in order to ensure strength.

  Further, as shown in FIG. 5, the outlet side end portion 13 e of the leg portion 13 is joined so as to be positioned on the same plane as the outlet side end portion 12 e of the extension portion 12 and the rear edge 72 of the fixed blade 7. . For this reason, the front edge 71 of the fixed blade 7 protrudes from the support frame 11 to the suction side. Further, the rear edge of the fixed blade 7 protrudes from the support frame 11 to the discharge side.

  As shown in FIG. 2, the length at which the extension 12 connects the fixed blade 7 and the support frame 11 (the length in the radial direction of the extension 12) varies depending on the position where the fixed blade 7 is attached. The extension 12 of the fixed blade 7 located on the top, bottom, left and right in the direction of gravity is short, and the extension of the other fixed blade 7 is long. According to this, it becomes easy to ensure sufficient strength to hold the stationary blade 8 on the support frame 11.

  About the air blower comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, when the rotating shaft 2 is rotationally driven by the motor 10, the moving blade 5 rotates counterclockwise as shown in FIG. 2, and air is guided to the moving blade 5 from the side where the motor 10 is disposed. At that time, dynamic pressure and static pressure are applied to the air by the plurality of rotating blades 4 and the orifices 9 provided around the rotating blades 4.

  Then, the air (discharged airflow) discharged from the moving blade 5 is guided to the stationary blade 8. As shown in FIG. 3, the inflow velocity V of air guided to the stationary blade 8 has an angle with respect to the axial direction of the rotating shaft 2, and the axial flow direction component Va flowing in the axial direction and the moving blade 5 And a turning direction component Vt flowing in the rotation direction. The axial flow direction component Va is a speed related to the air volume, but the swirl direction component Vt is perpendicular to the axial direction, that is, a circumferential direction component, and thus is not related to the air volume, but merely stirs the air. If it is not smoothly turned in the axial direction, it will be lost energy.

  Therefore, by using the stationary blade 8 having a plurality of fixed blades 7, the swirl direction component of the discharge airflow of the moving blade 5 is reduced, and the swirl direction component (swirling flow) that causes energy loss is recovered as a static pressure. The air blowing action is achieved while improving the efficiency.

  Here, the blade mounting angle of the fixed blade 7 is set to the blade mounting angle θa on the fixed hub 6 side from the central portion 7m in accordance with the discharge airflow of the moving blade 5 where the main flow is concentrated on the outer peripheral side from the central portion of the rotating blade 4. In comparison, the blade attachment angle θb on the outer peripheral side from the central portion 7m is increased. For this reason, the collision loss at the inlet of the fixed blade 7 is smaller in the region on the outer peripheral side than the central portion 7m where the swirl direction component at the inlet of the stationary blade 8 is larger than the region on the fixed hub 6 side from the central portion 7m. In this way, the turning speed component can be efficiently recovered to static pressure.

  Further, when the moving blade 5 is an axial flow type or a mixed flow type and only the discharge side of the rotating blade 4 of the moving blade 5 is surrounded by the orifice 9, a large blade tip vortex is formed on the outer periphery of the rotating blade 4. Occurs, and the discharge air velocity on the outer peripheral side of the rotor blade 5 is greatly reduced. In particular, when a leakage flow that is influenced by the blade tip vortex and flows backward from the gap between the orifice 9 and the rotary blade 4 to the suction side occurs, the axial component of the discharge airflow is greatly reduced. However, in the present embodiment, the blade mounting angle is maximized between the central portion 7m and the outer peripheral end 7b, and the blade mounting angle θc at the outer peripheral end 7b of the fixed blade 7 is adjusted to the central portion accordingly. Since it is made smaller than the blade attachment angle θm at 7 m, the collision loss at the inlet of the fixed blade 7 at the outer peripheral end 7 b of the fixed blade 7 of the stationary blade 8 can be suppressed small.

  For this reason, while being able to collect | recover efficiently a turning speed component to a static pressure from the center part 7m of the fixed blade | wing 7 to an outer peripheral side, the fixed blade | wing 7 which is easy to receive to the influence of the leakage flow of the rotating blade 4 of a moving blade 5, or a blade tip vortex. Even at the outer peripheral end 7b, the turning speed component can be efficiently recovered to static pressure.

  In the region from the fixed hub side end 7a of the fixed blade 7 to the portion where the blade mounting angle θ on the outer peripheral side is the maximum, the blade mounting angle θ of the fixed blade 7, particularly the inlet angle, matches the discharge air flow angle of the moving blade 5. Therefore, the swirl velocity component of the airflow discharged from the moving blade 5 can be efficiently converted to a static pressure without increasing the meridional height h2 of the fixed blade 7 and increasing the chord length.

  Further, the chord length can be suppressed without increasing toward the outer peripheral side of the fixed blade 7, and an increase in loss due to an increase in the surface friction loss of the fixed blade 7 and the wake width of the wake can be suppressed.

Further, if the blade mounting angle at the outer peripheral end 7b of the fixed blade 7 is smaller than the blade mounting angle in the region on the outer peripheral side from the central portion 7m, the leakage flow between the moving blade 5 and the orifice 9 or the moving blade 5 Due to the tip vortex generated at the tip of the blade, the angle of the discharge airflow from the outer peripheral end of the moving blade 5 is likely to be greatly affected. However, in the present embodiment, the meridional height h2 of the fixed blade 7 is provided so as to be substantially constant from the fixed hub side end 7a to the outer peripheral end 7b, so that the vicinity of the outer peripheral end 7b of the fixed blade 7 However, it can be suppressed without increasing the meridian height. For this reason, when the chord length of the outer peripheral end 7b of the stationary blade 7 of the stationary blade 8 is large, the fluctuation of the flow that is greatly affected is suppressed as much as possible, and the loss due to the turbulence is suppressed. The swirl velocity component of the discharge airflow of
It can be efficiently recovered at static pressure.

  Further, the fixed blade 7 is provided on the plane perpendicular to the rotating shaft 2 of the moving blade 5 such that the outer peripheral side is inclined in the counter-rotating direction of the moving blade 5 with respect to the hub side. Since the discharge airflow passes at different timings depending on the radial position of the fixed blade 7, the noise generated when the discharge airflow passes through the fixed blade 7 can be shifted and generated when it passes through the stationary blade 8. The amount of noise can be reduced.

  In addition, a predetermined gap between the outer peripheral end of the rotating blade 4 of the moving blade 5 and the orifice 9 expands from the minimum diameter portion 9x toward the discharge side opening 9y, and in front of the fixed blade 7 of the stationary blade 8. By providing the axial position of the outer peripheral end of the edge 71 so as to be positioned between the minimum diameter portion 9x of the orifice 9 and the discharge-side opening 9y, in the region from the outer peripheral side of the moving blade 5 to the outer peripheral end. The discharge airflow having a large swirl direction component can be caused to flow between the blades of the fixed blade 7 before shifting to a flow that expands in the radial direction toward the discharge side opening 9y (flow having a radial direction component). For this reason, a discharge air current with a large swirl direction component can be forcibly converted into an axial direction component, and can be efficiently recovered as a static pressure.

  Further, if all the strong swirl direction component flows in the vicinity of the outer peripheral edge 7b of the stationary blade 7 of the stationary blade 8 are forced to be converted into the axial component, the flow and static flow on the rear edge near the outer peripheral end 7b of the fixed blade 7 are static. A contracted flow is generated between the blade 8 and the flow from the outer peripheral side, and a flow that is not converted into static pressure is generated on the rear edge side in the vicinity of the outer peripheral end 7 b of the fixed blade 7. However, in the present embodiment, a predetermined gap S is provided between the outer peripheral end of the stationary blade 7 on the front edge side of the stationary blade 7 and the orifice 9, so that the pressure surface side of the front edge is intended to be on the suction surface side. Therefore, a slight leakage flow can be generated. This makes it difficult for contraction to occur on the rear edge side of the outer peripheral end 7b, and it can be efficiently recovered as static pressure. Further, the slight leakage flow from the pressure surface side to the negative pressure side in the gap S can be smoothly decelerated along the expanding discharge side opening 9y on the discharge side of the orifice 9, so that the flow loss increases. There is nothing.

  Further, a turbulent tip vortex generated in the vicinity of the outer peripheral end of the rotary blade 4 flows downstream, and a disturbance occurs when it collides with the extension portion 12 from the outer peripheral side of the fixed blade 7. However, in the present embodiment, the stationary blade 8 is fixed to the support frame 11 by the extension portion 12 in which only the rear edge side of the outer peripheral end 7b of the fixed blade 7 is extended, and the front edge side of the fixed blade 7 is the support frame. 11 is not fixed. That is, the extension portion 12 is positioned on the rear edge side of the fixed blade 7. For this reason, the turbulence of the airflow in the extension part 12 can be reduced on the front edge side of the fixed blade 7.

  Further, similarly to the operation of the fixed blade 7 with the orifice 9 described above, since the predetermined gap T is provided between the outer peripheral end of the fixed blade 7 of the stationary blade 8 on the front edge side and the support frame 11, the front edge A slight leakage flow can be intentionally generated from the pressure surface side to the suction surface side. This makes it difficult for contraction to occur on the rear edge side of the outer peripheral end 7b, and it can be efficiently recovered as static pressure. Further, the slight leakage flow from the pressure surface side to the negative pressure side in the gap T can be smoothly decelerated along the expanding discharge side opening 9y on the discharge side of the orifice 9, so that the flow loss increases. There is nothing.

  Further, since one surface of the extension portion 12 is formed with the same curvature as the concave portion of the arc of the fixed blade 7, the static pressure can be efficiently recovered without disturbing the flow on the rear edge side of the fixed blade 7 as much as possible.

  Further, the stationary blade 8 has a pitch of the fixed blade 7 in a region where the front edge 71 of the fixed blade 7 is located below the rear edge 72 (region on the left side of the fixed hub 6 in FIG. 2). The edge 71 is larger than the pitch of the fixed blades 7 in the region located above the rear edge 72 (the region on the right side of the fixed hub 6 in FIG. 2).

  For this reason, it is possible to reduce the occurrence of a portion where the fixed blade 7 is horizontal in the region where the fixed blade 7 is provided so that water flows in the direction of the moving blade 5. Thereby, it is possible to prevent the snow accumulated on the upper part of the blower 1 and its peripheral members from being melted and the water accumulated in the horizontal part of the fixed blade 7 from growing on the moving blade 5 side as an ice column. For this reason, the ice column does not interfere with the moving blade to generate abnormal noise, and the moving blade does not stop or break.

  Further, among the plurality of fixed blades 7, the fixed blade 7 in which the front edge 71 is below the rear edge 72 and at least a part of the outer peripheral end 7 b is below the fixed hub side end 7 a is the outer peripheral end of the fixed blade 7. 7 b is provided below the central portion 7 m of the same fixed blade 7. Alternatively, among such fixed blades 7, at least a part of the central portion 7 m is not provided with a fixed blade that is positioned below the outer peripheral end 7 b of the same fixed blade 7.

  For this reason, the fixed blade 7 in which the front edge 71 is below the rear edge 72 and at least a part of the outer peripheral end 7b is below the fixed hub side end 7a has a horizontal portion at the front edge 71 or the rear edge 72. There is no. Thereby, it is possible to prevent the snow accumulated on the upper portion of the blower 1 and its peripheral members from being melted and collecting on the horizontal portion of the fixed blade 7 to generate or grow an ice column.

  This point will be described in more detail with reference to FIG. FIG. 6 shows a blower in which fixed blades 7 having the same diameter as the fixed blades 7 arranged in other regions are also arranged in the region X1 for comparison with the present embodiment.

  In the case of the blower of FIG. 6 in which the rotating direction of the moving blade 205 is clockwise when viewed from the discharge side, the stationary blade 207 of the stationary blade that is on the right side of the fixed hub 206 is from the windward side to the leeward side. Even if a water droplet falls from above, it does not flow in the direction of the moving blade 205. However, what is on the left side is inclined upward from the windward side toward the leeward side, so that water droplets falling from above may flow down in the direction of the moving blade 205.

  When the water droplets falling from above are melted snow, etc., the fixed blade 7 grows as an icicle not only on the windward side, that is, in the direction of the moving blade 205, and interferes with the moving blade 205. As a result, abnormal noise may be generated, or the moving blade 5 may be stopped or damaged.

  In FIG. 6, of the water droplets that have fallen from above, the water droplets that flow in the direction of the moving blade 205 are water droplets that are less likely to flow in the left-right direction (the direction of the outer peripheral end 7 b or the fixed hub side end 7 a). . Such water droplets are conspicuously generated at a portion where the front edge 71 of the fixed blade 7 is horizontal (front edge horizontal portion 71f) or a portion where the rear edge 72 is horizontal (rear edge horizontal portion 72f).

  Such a horizontal portion is likely to occur when the entire front edge 71 or rear edge 72 of the fixed blade 7 is horizontal or curved when viewed from the discharge side. In particular, the leading edge 71 or the trailing edge 72 of the fixed blade 7 is curved when viewed from the discharge side, as described above, the blade mounting angle θ of the fixed blade 7 varies depending on the radial position of the fixed blade 7. This is likely to occur when configured as described above.

  However, in the present embodiment, as shown in FIG. 2, the fixed blade 7 has a large pitch in a region where the front edge 71 of the fixed blade 7 is located below the rear edge 72. As compared with the above, it is possible to reduce the fixed blade 7 provided in a state in which water easily flows in the direction of the moving blade 5 to have a horizontal portion.

Since the front edge 71 or the rear edge 72 of the fixed blade 7 on the left side of the fixed hub 6 does not have a horizontal portion, the water droplets flow in the left-right direction without stagnation, so that the ice column toward the moving blade 5 does not grow.

  In particular, the fixed blade 7 has a front edge 71 formed in a curved shape, the front edge 71 is below the rear edge 72, and at least a part of the outer peripheral end 7b is below the fixed hub side end 7a. Since the outer peripheral end 7b of the fixed blade is provided below the central portion 7m (the fixed blade disposed in the region X2 in FIG. 2), it is possible to eliminate a horizontal portion where water droplets easily collect.

  Further, from the stationary blade having the configuration shown in FIG. 6, except for the two fixed blades 7 on the left side of the fixed hub 206 and having the front edge horizontal portion 71f or the rear edge horizontal portion 72f, 11 blades as shown in FIG. In the stationary blade 8 configured as the fixed blade 7, an icicle grows in the direction of the moving blade 5, and does not interfere with the moving blade 5 to generate abnormal noise, and the moving blade 5 does not stop or break. . Further, the effect of collecting the static pressure of the stationary blade 8 can be maximized by minimizing the decrease in the number of fixed blades included in the stationary blade 8.

  Furthermore, in this embodiment, since the loss of the flow caused by supporting the stationary blade 8 on the casing that holds the orifice 9 can be reduced, the reduction in the efficiency of the static pressure recovery in the stationary blade 8 can be suppressed as much as possible. it can.

  Further, the thickness of the extension portion 12 is the same as the thickness of the fixed blade 7 on the rear edge side, and becomes thicker toward the front edge side, so that the air flow direction greatly varies on the front edge side of the extension portion 12. It is possible to suppress the flow loss due to peeling that can be performed on the downstream side of the extension portion 12 and to secure the strength necessary for holding the fixed blade 7.

  Further, since the fixed blade 7 is supported at a radial position on the outer peripheral side of the discharge side opening 9 y of the orifice 9, the fixed blade 7 is outside the airflow flowing along the leg 13 along the discharge side opening 9 y of the orifice 9. The resistance on the discharge side of the orifice 9 can be reduced.

  Further, since the fixed blade 7 is supported so that the rear end of the fixed blade 7 protrudes to the blow-out side from the support frame 11, the airflow flowing through the leg portion 13 along the discharge side opening 9 y of the orifice 9 is supported. The resistance on the discharge side of the orifice 9 can be reduced.

  In addition, in the region X1, not only the fixed blade 7 is provided, but also the extension portion 12 and the leg portion 13 are not provided, so that water drops accumulate in the horizontal portions of the extension portion 12 and the leg portion 13, and ice It does not become the starting point of occurrence or growth.

  In the present embodiment, two fixed blades 7 are removed from the stationary blade having the configuration shown in FIG. 6, and the pitch of the fixed blades 7 in the region on the left side of the fixed hub 6 is made unequal, thereby increasing the pitch. However, the present invention is not limited to this, and if the pitch of the region on the left side of the fixed hub 6 is larger than the region on the right side of the fixed hub 6, the region on the left side of the fixed hub 6 may be set to the same pitch. it can. In addition, when the area | region on the left side from the fixed hub 6 is also made into equal pitch, it is desirable to design so that the stationary blade 8 whole may be rotated a little and it may be set as the fixed blade arrangement | positioning which a horizontal part does not produce.

  In the present embodiment, the front edge 71 of the fixed blade 7 is linear and the rear edge 72 is curved. However, from the viewpoint of avoiding the location where water droplets tend to collect, the front edge 71 is curved. The trailing edge 72 may be linear.

  Hereinafter, the outdoor unit on which the blower is mounted will be described. FIG. 7 is a cross-sectional view of an outdoor unit equipped with the blower of the present embodiment.

As shown in FIG. 7, the outdoor unit includes a compressor 22, an outdoor heat exchanger 23, and the like in a casing 21 constituting an outer shell. The motor 10 is fixed to the housing 21 via a motor fixing tool 24 on a pillar fixed to the bottom of the housing 21, so that the blower 1 has the discharge side opening 9 y of the orifice 9 in the housing 21. It is being fixed to the housing | casing 21 so that it may correspond to the front part 21a. Further, the support frame 11 is fixed to the front portion 21 a of the casing 21, so that the blower 1 is fixed to the casing 21.

  Further, a blowing grill 25 is provided on the front portion 21a of the casing 21 so as to cover the stationary blade 8 protruding from the front portion 21a to the front surface (discharge side). The blow-out grill 25 is supported at a position on the outer peripheral side further than the support frame 11.

  Such an outdoor unit constitutes a refrigeration cycle by being connected to an indoor unit of an air conditioner including an indoor heat exchanger or a unit of a heat pump type hot water heater. Then, the air around the outdoor unit is blown to the outdoor heat exchanger 23 by the blower 1, so that heat exchange is performed with the refrigerant flowing in the heat transfer pipe of the outdoor heat exchanger 23 by the operation of the compressor 22.

  In the outdoor unit configured as described above, it is possible to prevent the fixed blade 7 having such a shape that water flows down in the direction of the moving blade 5 from having a horizontal portion. For this reason, it is possible to prevent the snow accumulated in the upper part of the outdoor unit from being melted and accumulating on the fixed blade 7, generating icicles, and growing.

  Further, in such an outdoor unit, the stationary blades 7 and the blowing grill 25 of the stationary blade 8 are not directly fixed, but are fixed to the casing 21. Even if an external force is applied to the blowing grill 25 due to the pressure, the external force is absorbed to some extent by the deformation of the front portion 21a of the casing 21, so that the stationary blade 8 is deformed or the stationary blade 7 of the stationary blade 8 is fixed. And the positional relationship between the orifice 9 and the orifice 9 do not shift. For this reason, it is not necessary to increase the strength of the blowing grill 25, and the outdoor unit can be configured at low cost.

  Moreover, since the stationary blade 7 and the blowing grill 25 of the stationary blade 8 can be configured separately, the molding accuracy when the stationary blade 7 is molded can be improved, and the static pressure can be efficiently recovered at a low cost. A possible stationary blade 8 can be manufactured. For example, when the fixed blade 7 and the blowing grill 25 are integrally formed, it is necessary to provide a fin for eliminating the undercut at a position where the fixed blade 7 and the blowing grill 25 intersect.

  Here, undercut refers to a shape that cannot be released only in the direction of opening the mold when the molded product is taken out (released) from the mold in the molding process. If it is not provided, it cannot be manufactured with a mold that opens only in the vertical direction, and it is necessary to provide a slide core (side core) that slides in the horizontal direction, which increases the cost of the mold and increases the manufacturing cost.

  However, in the present embodiment, it is not necessary to provide a fin for eliminating such an undercut. Therefore, by providing a fin on the fixed blade 7, performance degradation when the stationary blade 8 collects static pressure is suppressed. Can do.

(Embodiment 2)
FIG. 8 is a front view as seen from the discharge side of the blower according to Embodiment 2 of the present invention. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

Only the differences between the present embodiment and the first embodiment will be described below.
As shown in FIG. 8, a stationary blade 18 having a fixed hub 6 and 12 fixed blades 7 provided around the fixed hub 6 is provided on the discharge side (downstream side) of the moving blade 5. Yes. The stationary blades 18 have a fixed blade 7 pitch in the region corresponding to the center in the vertical direction on the left side of the rotating shaft 2 when viewed from the direction in which the rotating direction of the moving blade 5 is clockwise. It is configured to be twice the pitch. That is, if the fixed blades 7 having the same shape are arranged at an equal pitch, one fixed plate is provided in a region corresponding to the center in the vertical direction on the left side of the rotary shaft 2 when viewed from the direction in which the rotating direction of the moving blade 5 is clockwise. The blade | wing 7 will be arrange | positioned.

  The shape of the fixed blade 17 provided in the region on the left side of the fixed hub 6 when viewed from the direction in which the rotation direction of the moving blade 5 is clockwise is the same as that of the fixed blade 7 provided in the region on the right side of the fixed hub 6. It is different from the shape.

  The fixed blades 17 having different shapes are arranged such that if the fixed blades 7 having the same shape are arranged at an equal pitch, at least a part of the central portion 7m of the fixed blade is positioned below the outer peripheral end 7b of the fixed blade. It is. And the fixed blade | wing 17 is a shape which does not provide a horizontal part from the center part 17m of a fixed blade | wing to the outer peripheral end 7b.

  More specifically, the shape between the central portion 17m of the fixed blade 17 and the fixed hub side end 17a is the same shape as the other fixed blades 7, and the shape between the central portion 17m and the outer peripheral end 17b is different. . The rear edge 172 is formed in a curved shape between the central portion 17m of the fixed blade 17 and the fixed hub side end 17a, but is formed in a straight shape between the central portion 17m and the outer peripheral end 17b. Yes.

  The meridional surface height h2 of the fixed blade 17 is the same as the meridian surface height h2 of the other 11 fixed blades 7, and is constant from the fixed hub side end 17a to the outer peripheral end 17b. The blade mounting angle θ of the fixed blade 17 is the same as the blade mounting angle θ of the other 11 fixed blades 7, and the blade mounting angle θb on the outer peripheral end 17b side from the central portion 17m is fixed from the central portion 17m. It is larger than the blade mounting angle θa on the hub side end 17a side.

  For this reason, the front edge 171 of the fixed blade 17 is linearly formed between the central portion 17m of the fixed blade 17 and the fixed hub side end 17a, like the other 11 fixed blades 7. Between the central portion 17m and the outer peripheral end 17b, a curved shape is formed.

Alternatively, if the stationary blade 18 has the same shape as the fixed blade 7 provided in the region X1 at the same pitch as the fixed blade 7 provided in a region other than the region X1, at least a part of the central portion 7m of the fixed blade 7 is provided. Of the fixed blades 7 that are positioned below the outer peripheral end 7b of the same fixed blade 7 except that one of the front blades 71 or the rear edge 72 that has more horizontal portions is removed. At the same time, a part of the shape of one stationary blade having a smaller horizontal portion is corrected.
In the present embodiment, as shown in FIG. 8, the shape of at least one of the fixed blades 7 in a region where the front edge 71 of the fixed blade 7 is located below the rear edge 72 is different. Compared to the stationary blades of FIG. 5, it is possible to reduce the fixed blade 7 provided in a state where water easily flows in the direction of the moving blade 5 from having a horizontal portion.

  And since the front edge 71, the front edge 171, or the rear edge 72 or the rear edge 172 of the fixed blade 7 or the fixed blade 17 on the left side of the fixed hub 206 does not have a horizontal portion, water droplets flow in the left-right direction without stagnation. Therefore, the icicle heading toward the moving blade 5 does not grow.

Further, the other stationary blade 17 except for one of the two stationary blades 7 on the left side of the stationary hub 6 and having the front edge horizontal portion 71f or the rear edge horizontal portion 72f is removed from the stationary blade having the configuration of FIG. Since the shape of the rear edge 172 was changed to a portion where the slope changes on the left and right sides, and the shape was inclined to one side without a horizontal portion, the water droplets were stagnated. Without moving to the left and right direction (outer peripheral end 17b direction or fixed hub side end 17a direction), the ice column toward the moving blade 5 grows and interferes with the moving blade 5 to generate abnormal noise or the moving blade 5 stops. No damage or damage. Furthermore, the effect of collecting the static pressure of the stationary blade 18 can be maximized by minimizing the number of fixed blades having different shapes.

  Further, in the shape modification from the fixed blade 7 to the fixed blade 17, the curved shape formed by the trailing edge 72 of the fixed blade 7 was modified, but the meridional surface height h2 in FIG. 1 and the blade attachment angle θ in FIG. 3 were changed. Not done. For this reason, the shape of the leading edge 71 of the fixed blade 17 is also different from that of the fixed blade 7, but there is almost no deterioration in the performance of recovering the static pressure due to this correction. This is because the performance of the stationary blade to recover the static pressure is greatly affected by the meridian surface height h2 and the blade mounting angle θ.

  In the present embodiment, one fixed blade 7 is removed from the stationary blade having the configuration shown in FIG. This is because the entire fixed blade 7 of the former fixed blade 7 is almost horizontal, and the risk of icicles can be avoided more reliably than by correcting the shape. Therefore, depending on the posture of the fixed blade 7, the shape of all the fixed blades that may grow ice pillars may be corrected without removing the former fixed blade 7.

  In the present embodiment, the front edge 71 of the fixed blade 7 is linear and the rear edge 72 is curved. However, from the viewpoint of avoiding the location where water droplets tend to collect, the front edge 71 is curved. The trailing edge 72 may be linear. In this case, the fixed blade 17 whose shape is changed is linear between the central portion 17m of the front edge 171 and the fixed hub side end 17a, and is curved between the central portion 17m and the outer peripheral end 17b. At the same time, a curved shape may be formed between the central portion 17m of the rear edge 172 and the fixed hub side end 17a, and a linear shape may be formed between the central portion 17m and the outer peripheral end 17b.

  As described above, the blower according to the present embodiment can prevent the fixed blade 7 arranged in such a shape that water flows down in the direction of the moving blade 5 from having a horizontal portion. For this reason, it can prevent that the snow etc. which accumulated on the upper part of the air blower 1 and its peripheral member melt | dissolve, and it accumulates on the fixed blade | wing 7 or the fixed blade | wing 17, generation | occurrence | production of an ice column, or growing. As a result, the ice column does not interfere with the moving blade to generate abnormal noise, and the moving blade does not stop or break.

  Moreover, the outdoor unit equipped with the blower of the present embodiment can prevent the fixed blade 7 having a shape such that water flows down in the direction of the moving blade 5 from having a horizontal portion. For this reason, it is possible to prevent the snow accumulated in the upper part of the outdoor unit from being melted and accumulating on the fixed blade 7, generating icicles, and growing.

  As described above, the blower having the configuration according to the present invention is capable of improving both aerodynamic performance and high efficiency, and at the ambient temperature conditions below the freezing point such as in the severe winter season, Can be prevented, and the blades can be prevented from being damaged. Therefore, it can be applied to applications such as air conditioning equipment for air conditioners such as home and commercial use, and heat pump equipment such as water heaters.

DESCRIPTION OF SYMBOLS 1 Blower 2 Rotating shaft 3 Rotating hub 4 Rotating blade 5, 205 Rotor blade 6, 206 Fixed hub 7, 17, 207 Fixed blade 7a, 17a Fixed hub side end 7b, 17b Outer peripheral end 7m, 17m Central part 71, 171 Front edge 72, 172 Trailing edge 8, 18 Stator blade 9 Orifice 9x Minimum diameter portion 9y Discharge side opening 9z Suction side opening 10 Motor 11 Support frame 12 Extension portion 13 Leg portion 21 Housing 21a Front portion 22 Compressor 23 Outdoor heat exchange 24 Motor fixture 25 Blowout grill

Claims (4)

A rotating blade having a rotating hub having a rotating shaft parallel to the ground, and a plurality of rotating blades provided around the rotating hub, and provided on the discharge side of the moving blade, around the fixed hub and the fixed hub A blower mounted on an outdoor unit of an air conditioner, wherein the stationary blade has a front edge of the fixed blade from a rear edge. The interval between the fixed blades provided in the region located below the machine is larger than the interval between the fixed blades provided in the region located above the outdoor unit with the front edge of the fixed blade above the rear edge. Blower. In the plurality of fixed blades, at least one of a front edge or a rear edge is formed in a curved shape, and among the plurality of fixed blades, a front edge is located below the rear unit from the rear edge, and at least an outer peripheral end of the plurality of fixed blades The blower according to claim 1, wherein the fixed blade partly below the fixed hub side end has an outer peripheral end of the fixed blade provided below the outdoor unit from a central portion of the fixed blade. The blower according to claim 2, wherein the mounting angle of the fixed blade not provided with the horizontal portion is the same as the mounting angle of the other fixed blade. The outdoor unit which mounts the air blower of any one of Claim 1 to 3.