WO2015083371A1

WO2015083371A1 - Fan and outdoor unit equipped with same

Info

Publication number: WO2015083371A1
Application number: PCT/JP2014/006016
Authority: WO
Inventors: 木田　琢己; 杉尾　孝; 司石曽根; 優塩谷
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2013-12-04
Filing date: 2014-12-02
Publication date: 2015-06-11
Also published as: CN108708877A; CN108708877B; CN110985445A; CN110985445B; CN105793578A; CN105793578B

Abstract

In the present invention, the following are provided: a rotor vane (5) having a rotating hub (3) that has a rotating axle (2), and a plurality of rotating blades (4) provided around the rotating hub (3); and a stator vane (8) provided on the discharge side of the rotor vane (5) and having a fixed hub (6) and a plurality of fixed blades (7) provided around the fixed hub (6). Also, to match the outflow of air from the rotor vane (5) where a main flow of air concentrates in the area outside of the center of the rotating blades (4), the fixed blades (7) have a larger attachment angle outside a central portion in the radial direction of the fixed blades (7), as compared to the attachment angle of the fixed blades (7) towards the fixed hub (6) relative to the central portion of the fixed blades (7).

Description

Blower and outdoor unit equipped with the blower

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 hot water heater.

In recent years, in refrigeration equipment such as air conditioners, energy saving is rapidly progressing as a countermeasure to global warming, and it is necessary to reduce the input of equipment. In addition, there is a need for improved heating comfort of air conditioners. For that purpose, the heat exchanger of the outdoor unit has higher performance, and the noise of the blower mounted on the outdoor unit is reduced. Quantification is also essential.

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. 13 is a block diagram showing a conventional outdoor unit. In FIG. 13, 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. I have.

The mouth ring 106 is located on the trailing edge side, which is the blowing side of the propeller fan 105, and guides the blown air flow. An enlarged blowing port 106a having a larger diameter than the front part is provided at the rear part of the mouth ring 106. Is formed. 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 pressure recovery vane 107 collects the swirling flow that causes energy loss in the circumferential direction as a static pressure, so that the axial flow rate can be increased. Further, since the swirl flow from the propeller fan 105 can be decelerated by the static pressure recovery vane 107, noise can be reduced.

However, in the rotary blades (moving blades) of a blower such as the propeller fan 105 used in a conventional outdoor unit, the mainstream is concentrated from the substantially central position to the outer peripheral side at the radial position of the blades. The directional component also increases, and the inflow speed from the wake of the rotor blade increases.

For this reason, when the chord length of the static pressure recovery vane 107, which is a stationary blade, is increased from the central portion toward the outer periphery as in the prior art, the blade surface friction loss and the loss due to the increase in the wake width of the wake increase. It had the problem of end up.

In addition, the leakage flow between the rotating blades of the propeller fan 105, which is a moving blade, and the mouth ring 106 called an orifice, and the influence of the tip vortex generated at the tip of the moving blade are affected by the downstream static pressure recovery vane 107. Reach the leading edge. This influence is particularly great from the center of the stationary blade to the outer peripheral edge. For this reason, if the chord length at the outer peripheral end of the static pressure recovery vane 107 is large as in the prior art, the effect of hindering the flow increases, and the loss due to turbulence only increases, effectively reducing the swirl direction component. The problem was that it could not be recovered as pressure.

In addition, in a rotating blade (blade) of a blower such as a propeller fan 105 used in a conventional outdoor unit or the like, the leading edge or the trailing edge of the fixed blade depends on the mounting angle or shape of the stationary blade such as the static pressure recovery vane 107. Etc., there will be a horizontal part. 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.

Further, the rotating blades (moving blades) of a blower such as the propeller fan 105 used in the conventional outdoor unit having the stationary blades on the downstream side of the moving blades have the following problems. That is, depending on the position and shape of the stationary blade, when the stationary blade or the blowing grill is pressed strongly toward the moving blade side, the stationary blade such as the static pressure recovery vane 107 of the stationary blade comes into contact with the moving blade, and the moving blade or the stationary blade Could be deformed or damaged.

DETAILED DESCRIPTION OF THE INVENTION The present invention improves aerodynamic performance such as low noise and large airflow in an axial flow type or diagonal flow type blower used in an outdoor unit of an air conditioner or heat pump water heater. In addition, an outdoor unit equipped with a blower realizes power saving and low noise.

Further, the present invention is an axial flow type or diagonal flow type blower used for an outdoor unit of an air conditioner or a heat pump water heater. Is to prevent. 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.

Further, the present invention is an axial flow or mixed flow type blower having a stationary blade on the downstream side of a low moving blade, and when the stationary blade is strongly pushed toward the moving blade side, the fixed blade is moved to the moving blade. It is intended to prevent touching. Further, in an outdoor unit equipped with a blower, the stationary blades are prevented from coming into contact with the moving blades when the stationary blades or the blowout grill are strongly pressed toward the moving blades.

JP 2000-130799 A

The blower of the present invention includes a moving blade and a stationary blade, and the stationary blade of the stationary blade has a blade mounting angle with respect to a plane perpendicular to the central axis on the outer peripheral side from the central portion in the radial direction of the stationary blade. Larger than the blade mounting angle on the fixed hub side.

With this configuration, the collision loss at the inlet of the stationary blade of the stationary blade can be suppressed to a small value on the outer peripheral side from the center portion of the stationary blade of the stationary blade, and the swirl direction component can be efficiently recovered to the static pressure.

Therefore, the aerodynamic performance of the blower of the present invention is improved. Moreover, the outdoor unit equipped with the blower of the present invention can realize power saving and noise reduction.

The blower of the present invention includes a moving blade, an orifice, and a stationary blade. The stationary blade of the stationary blade has an axial position at the outer peripheral end of the leading edge that is an edge on the suction side of the stationary blade. It is provided so as to be positioned between the small diameter portion and the discharge side opening.

With this configuration, a strong flow of the swirl direction component from the moving blade flows between the stationary blades of the stationary blade before moving to a radially expanding flow toward the discharge opening of the orifice. As a result, the flow is forcibly converted into an axial flow, so that it can be efficiently recovered to a static pressure.

The blower of the present invention includes a moving blade and a stationary blade, and the stationary blade is provided in a region where the front edge, which is the suction side edge of the fixed blade, is located below the rear edge, which is the blowing side edge. The distance between the fixed blades is larger than the distance between the fixed blades provided in the region where the front edge is located above the rear edge.

This configuration makes it easy to collect water droplets, reduces the horizontal part that is the starting point of ice generation and growth, and eliminates the occurrence of abnormal noise due to ice generation and growth, and stops and breaks the blades. The swirl direction component can be recovered to static pressure well.

Therefore, 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.

Further, the blower of the present invention includes a moving blade and a stationary blade, and the stationary blade includes an annular support frame centered on the rotation axis on the outer periphery, and the support frame and the orifice are fixed. .

This configuration can prevent the stationary blade from coming into contact with the moving blade when the stationary blade is strongly pushed toward the moving blade side, thereby deforming or damaging the moving blade or the stationary blade.

Therefore, the blower of the present invention can prevent the stationary blade from coming into contact with the moving blade and deforming or damaging the moving blade or the stationary blade. Moreover, the outdoor unit equipped with the blower of the present invention can prevent the moving blade and the stationary blade from being deformed or damaged.

FIG. 1 is a meridional sectional view of a blower according to a first embodiment of the present invention. FIG. 2 is a front view of the blower as viewed from the discharge side according to the first embodiment of the present invention. 3A is a cross-sectional view taken along the line 3A-3A in FIG. 3B is a cross-sectional view taken along the line 3B-3B of FIG. 3C is a cross-sectional view taken along the line 3C-3C in FIG. FIG. 4 is an explanatory diagram showing the relationship between the radial position of the fixed blade of the blower and the blade mounting angle in the first embodiment of the present invention. FIG. 5 is a perspective view of a principal part showing a connection portion between the fixed blade and the support frame in the first embodiment of the present invention. FIG. 6 is a cross-sectional view of the outdoor unit equipped with the blower according to the first embodiment of the present invention. FIG. 7 is a longitudinal sectional view of another outdoor unit equipped with the blower according to the first embodiment of the present invention. FIG. 8 is a configuration diagram of the blower according to the second embodiment of the present invention. FIG. 9 is a front view as seen from the discharge side of the blower according to the second embodiment of the present invention. FIG. 10 is a front view seen from the discharge side of the blower according to the third embodiment of the present invention. FIG. 11: is the front view seen from the discharge side of the air blower in the 4th Embodiment of this invention. FIG. 12: is the front view seen from the discharge side of the air blower in the 5th Embodiment of this invention. FIG. 13 is a longitudinal sectional view of an outdoor unit of a conventional air conditioner.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(First embodiment)
FIG. 1 is a meridional sectional view of a blower according to a first embodiment of the present invention. Here, the meridional sectional view is a sectional view obtained by rotationally projecting the rotating blade 4 of the moving blade 5 and the fixed blade 7 of the stationary blade 8 on a plane including the rotational axis 2 of the moving blade 5 or the central axis of the stationary blade 8. It is. FIG. 2 is a front view as seen from the discharge side of the blower in the present embodiment.

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. . On the discharge side (downstream side) of the moving blade 5, there is provided a stationary blade 8 having a fixed hub 6 coaxially positioned with the

rotating hub

3 and 13 fixed blades 7 provided around the fixed hub 6. It has been. Further, an orifice 9 is provided 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 with a predetermined gap from the moving blade 5 and the stationary blade 8. Yes.

The rotary shaft 2 is provided on the suction side of the rotor blade 5 and is connected to a drive shaft of a motor 10 that rotationally drives the rotor 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. In addition, the fixed blade 7 is supported by a housing (not shown) 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 an 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 height of the meridional plane at the center of the rotating blade 4 in the radial direction (when the rotating blade 4 of the moving blade 5 is rotated and projected onto a plane including the rotating shaft 2 of the moving blade 5). The length in the axial direction is shorter than h1.

The stationary hub 6 of the stationary blade 8 has a cylindrical shape, and its outer diameter 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 configured to be longer than the radial length of the rotary blade 4.

The orifice 9 has 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 configured as a cylindrical surface having a straight portion extending in the axial direction with a constant diameter, but is configured as a constant diameter circumference without the straight portion. You may do it. 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 moving blade 5 is adjusted in its axial position so that the outer peripheral end of the trailing edge, which is the 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 stationary blade 8 has its axial position adjusted so that the outer peripheral end of the leading edge, which is the suction side edge of the fixed blade 7, is located between the minimum diameter portion 9 x of the orifice 9 and the discharge side opening 9 y. ing. 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 stationary blade 7 of the stationary blade 8 will be described in detail.

As shown in FIG. 1, the meridional height h2 of the fixed vane 7 is configured to be substantially constant from the fixed hub side end 7a, which is the end on the fixed hub 6 side, to the outer peripheral end 7b. Further, as shown in FIG. 2, the front edge of the fixed blade 7 on the surface perpendicular to the rotating shaft 2 of the moving blade 5 is such that the outer peripheral end 7b of the rotating blade 4 of the moving blade 5 with respect to the fixed hub side end 7a. It is inclined with respect to the radial direction so as to be positioned in the counter-rotating direction.

3A is a cross section taken along the line 3A-3A in FIG. 1, and is a cross section on the hub side. 3B is a 3B-3B cross section of FIG. 1, and is a cross section on the outer peripheral side. 3C is a 3C-3C cross section of FIG. 1, and is a cross section of the outer peripheral end. 3A to 3C are diagrams showing the cross-sectional shapes of the rotary blade 4 and the fixed blade 7 at the same radial position, and the relationship between the air flow discharged from the moving blade 5 and the blade mounting angle θ of the fixed blade 7. It is. Here, the blade attachment angle θ is an angle with respect to a plane perpendicular to the rotation axis 2. FIG. 4 is a diagram illustrating the relationship between the radial position of the fixed blade 7 and the blade mounting angle θ.

As shown in FIGS. 3A to 3C, the rotating blade 4 has an arc shape or a blade-shaped cross section that is convex in the counter-rotating direction of the moving blade 5, and the rotating blade trailing edge 4a is located on the discharge side. In this way, it is inclined with respect to the rotating shaft 2 and fixed to the rotating hub 3. The fixed blade 7 has an arc shape or a blade-shaped cross section that is convex in the rotating direction of the moving blade 5, and is a fixed shaft that is also the central axis of the stationary blade 8 so that the leading edge 7 c is located on the suction side. The blade 6 is fixed to the fixed hub 6 with a blade mounting angle θ inclined with respect to a plane perpendicular to the central axis of the hub 6. Here, the blade attachment angle θ is formed by a straight line connecting the front edge 7c, which is the suction side edge of the fixed blade 7, and the rear edge 7d, which is the discharge side edge, and a horizontal plane perpendicular to the central axis of the fixed hub 6. The angle is an angle that increases from the horizontal plane perpendicular to the central axis of the fixed hub 6 toward the suction side or the counter-rotation direction side of the rotor blade 5.

The blade mounting angle θ of the fixed blade 7 is configured to be different depending on the position of the fixed blade 7 in the radial direction.

As shown in FIGS. 3A 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 minimized. Then, the blade attachment angle θ increases as it goes to the outer peripheral side of the fixed blade 7 in the radial direction, and becomes a blade attachment angle θm at the central portion 7m of the fixed blade 7, as shown in FIG. As it goes further to the outer peripheral side than the central portion 7m, the blade mounting angle θ is further expanded, and is maximized between the central portion 7m and the outer peripheral end 7b of the fixed blade 7 as shown in FIG. 3B and FIG. Angle θb). The blade mounting angle θ gradually decreases further on the outer peripheral side than the position where the blade mounting angle θb is reached, and reaches the blade mounting angle θc at the outer peripheral end 7b of the fixed blade 7 as shown in FIGS. 3C and 4. 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 mounting angles θb and θc on the outer peripheral side from the central portion 7m are larger than the blade mounting angles θab on the fixed hub 6 side from the central portion 7m. In addition, the blade attachment angle θb is maximized on the outer peripheral side from the central portion 7m.

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 of the fixed blade 7 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 central 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 connecting 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 principal 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 7d side of the stationary blade 7. FIG. As shown in FIG. 5, the outer peripheral end 7 b of the fixed blade 7 is provided with a plate-like extension portion 12 that extends the fixed blade 7 in the radial direction only on the rear edge 7 d 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 portion 12 is the same as the thickness of the fixed blade 7 at the extension portion trailing edge 12a, but is formed so as to increase toward the extension portion front edge 12b 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 a leg portion 13 protruding to 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 meridian surface height h2 of the fixed blade 7. Further, as shown in FIG. 1, 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, a predetermined gap T is formed between the front edge 7 c side of the fixed blade 7 and the support frame 11 by joining the outer peripheral side end portion of the extension portion 12 and the end portion of the leg portion 13 on the fixed hub 6 side. Then, it is 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 end portion 13 a on the blowing side of the leg portion 13 is joined so as to be positioned on the same plane as the extending portion rear edge 12 a of the extending portion 12 and the rear edge 7 d of the fixed blade 7. Is done. For this reason, the front edge 7 c of the fixed blade 7 projects from the support frame 11 toward the suction side. Further, the rear edge 7d of the fixed blade 7 protrudes from the support frame 11 to the discharge side.

Note that, 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. With this configuration, it is easy to secure sufficient strength to hold the stationary blade 8 on the support frame 11.

In the present embodiment, the stationary blade 7 of the stationary blade 8 is fixed to the orifice 9 or the casing through an annular support frame 11 centering on a rotation shaft provided on the outer periphery thereof. Therefore, even when the stationary blade 8 is pushed in the direction of the moving blade 5, a predetermined gap between the stationary blade 8 and the moving blade 5 can be maintained, and the stationary blade 7 of the stationary blade 8 It is possible to prevent the moving blade 5 and the stationary blade 8 from being deformed or damaged by coming into contact with the rotating blade 4 of the moving blade 5.

In particular, in the present embodiment, the plurality of fixed blades 7 include an extension portion 12 and a leg portion 13 extending from the outer peripheral end of the extension portion 12 in the direction of the orifice 9, and the extension portion 12 and the leg portion 13 are interposed therebetween. Are held in the orifice 9 or the housing. Therefore, even when the stationary blade 8 is pushed and displaced in the direction of the moving blade 5, the extension portion 12 and the leg portion 13 absorb the displacement, and the moving blade 5 and the stationary blade 8 are deformed or damaged. Can be prevented.

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

First, when the rotary shaft 2 is driven to rotate 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.

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, the energy is lost.

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 θ of the fixed blade 7 is a blade 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 radial center portion of the rotary blade 4. Compared to the mounting angle θa, the blade mounting angle θb on the outer peripheral side of the central portion 7m is made larger. 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 this embodiment, the blade mounting angle θ is maximized between the central portion 7m of the fixed blade 7 and the outer peripheral end 7b, and the blade mounting angle at the outer peripheral end 7b of the fixed blade 7 is adjusted accordingly. Since θc is made smaller than the blade mounting angle θm at the central portion 7m, the collision loss at the inlet of the fixed blade 7 at the outer peripheral end 7b of the fixed blade 7 of the stationary blade 8 can be suppressed to be 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 extending toward the outer peripheral side of the fixed blade 7, and the increase in loss due to the surface friction loss of the fixed blade 7 and the increase in the wake width of the wake can be suppressed.

Further, if the blade mounting angle θ at the outer peripheral end 7b of the fixed blade 7 is smaller than the blade mounting angle θ 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, Due to the blade tip vortex generated at the blade tip of the blade 5, 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 discharged airflow can be efficiently recovered to 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. The discharge airflow passes at different timings depending on the radial position of the fixed blade 7. For this reason, the noise generated when the discharge airflow passes through the fixed blade 7 can be shifted, and the noise generated when passing through the stationary blade 8 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. The axial position of the outer peripheral edge of the edge is provided so as to be positioned between the minimum diameter portion 9x of the orifice 9 and the discharge side opening 9y. With such a configuration, a discharge airflow having a large swirl direction component in a region extending from the outer peripheral side to the outer peripheral end of the moving blade 5 flows in a radial direction toward the discharge-side opening 9y (radial component) Before the transition to the flow). 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, when all the strong flow of the swirl direction component in the vicinity of the outer peripheral end 7b of the stationary blade 7 of the stationary blade 8 is forced to be converted into the axial component, the flow on the trailing edge 7d side in the vicinity of the outer peripheral end 7b of the fixed blade 7 And a flow from the outer peripheral side of the stationary blade 8 occurs, and a flow that is not converted into static pressure is generated on the rear edge 7d side near the outer peripheral end 7b of the fixed blade 7. However, in this embodiment, since the predetermined gap S is provided between the outer peripheral end of the stationary blade 7 on the front edge 7c side of the stationary blade 7 and the orifice 9, the suction surface from the pressure surface side of the front edge 7c. A slight leakage flow can be intentionally generated on the side. As a result, the contracted flow is less likely to occur on the rear edge 7d side of the outer peripheral end 7b and can be efficiently recovered as a 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 is disturbed 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 extended portion 12 in which only the rear edge 7 d side of the outer peripheral end 7 b of the fixed blade 7 is extended, and the front edge 7 c of the fixed blade 7. The side is not fixed to the support frame 11. 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 7 c side of the fixed blade 7.

In addition, since the fixed blade 7 acts on the orifice 9 as described above, a predetermined gap T is provided between the outer peripheral end of the stationary blade 7 on the front edge 7c side of the fixed blade 7 and the support frame 11. A slight leakage flow can be intentionally generated from the pressure surface side to the suction surface side of the leading edge. As a result, the contracted flow is less likely to occur on the rear edge 7d side of the outer peripheral end 7b and can be efficiently recovered as a 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, as shown in FIG. 5, one surface of the extension 12 is formed with the same curvature as the arc recess of the fixed blade 7, so that the flow on the rear edge 7 d side of the fixed blade 7 can be disturbed as much as possible. The static pressure can be recovered efficiently.

As described above, in the present embodiment, the loss of flow caused by supporting the stationary blade 8 on the casing that holds the orifice 9 can be reduced, so that the efficiency of static pressure recovery in the stationary blade 8 can be reduced as much as possible. Can be suppressed.

Further, the thickness of the extension 12 is the same as the thickness of the fixed blade 7 on the extension trailing edge 12a side and becomes thicker toward the front edge, so that the direction of the air flow is on the extension leading edge 12b side of the extension 12. It becomes possible to match the direction of the flow that fluctuates greatly, and it is possible to suppress the flow loss due to the separation that occurs on the downstream side of the extension portion 12 and to secure the strength necessary to hold 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.

Hereinafter, the outdoor unit on which the above blower is mounted will be described. FIG. 6 is a cross-sectional view of an outdoor unit equipped with the blower of the present embodiment.

As shown in FIG. 6, the outdoor unit includes a compressor 22, an outdoor heat exchanger 23, and the like in a casing 21 that forms 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.

Furthermore, 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. Further, the blowout grill 25 may be held by the housing 21 or the support frame 11.

Such an outdoor unit constitutes a refrigeration cycle by being connected to an indoor unit of an air conditioner equipped with an indoor heat exchanger or a unit of a heat pump 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, the stationary blade 7 and the blowout 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 a certain 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 8 is fixed. The positional relationship between the blade 7 and the orifice 9 does 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.

Note that the outdoor unit on which the blower of the present embodiment is mounted may not be a front blowing type outdoor unit as shown in FIG. 6, but may be a top blowing type outdoor unit.

FIG. 7 is a longitudinal sectional view of an outdoor unit of a top blowing type equipped with a blower according to the present embodiment. The outdoor unit in FIG. 7 is different from the outdoor unit described in FIG. 6 in that the direction of blowing air from the blower 1 is only the direction of blowing out from the upper surface portion 21b of the casing 21. Since it becomes the structure and effect | action similar to the case of the front blowing type demonstrated, description is abbreviate | omitted.

Further, in the present embodiment, the stationary blade 7 of the stationary blade 8 is fixed to the orifice 9 or the housing via the support frame 11. Therefore, even when the blowing grill 25 or the stationary blade 8 is pushed in the direction of the moving blade 5, a predetermined gap between the blowing grill 25 or the stationary blade 8 and the moving blade 5 can be maintained. It is possible to prevent the stationary blade 7 of the stationary blade 8 from coming into contact with the moving blade 5 to deform or break the moving blade 5 or the stationary blade 8.

(Second Embodiment)
FIG. 8 is a meridional sectional view of another blower according to the second embodiment of the present invention. FIG. 9 is a front view as seen from the discharge side of another blower according to the second embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals, and description thereof is omitted.

Hereinafter, only differences between the present embodiment and the first embodiment of the present invention will be described.

As shown in FIG. 8, in the present embodiment, the extension part front edge 12 b side of the extension part 12 is substantially parallel to the front part 21 a shown in FIG. 6, while the extension part rear edge 12 a side is the side of the fixed blade 17. As it goes to the outer peripheral side, it is inclined so as to approach the front portion 21a side. For this reason, the meridional section height of the extension portion 12 is formed so as to become shorter toward the outer peripheral side of the fixed blade 17.

A blade tip vortex generated in the vicinity of the outer peripheral end of the rotary blade 4 flows downstream, and is disturbed when it collides with the extension 12 from the outer periphery of the fixed blade 17. In this embodiment, the meridional section of the extension 12 is used. By lowering the height toward the outer peripheral side, the turbulence of the flow in the extension portion 12 can be kept small, and the flow resistance can be reduced.

Further, as shown in FIG. 9, in this embodiment, the extension portion 12 is provided only on some of the fixed blades 17. The total number of fixed blades 17 is 13, while the number of fixed blades 17x provided with the extension 12 is five. In the upper part of the gravity direction, two fixed blades 17y not provided with the extension 12 are arranged next to the fixed blade 17x provided with the extension 12, and in the lower part of the fixed blade 17x provided with the extension 12. Next, one fixed blade 17y not provided with the extension 12 is disposed. That is, the number of the fixed blades 17y provided between the two fixed blades 17x provided with the extension portion 12 and not provided with the extension portion 12 is smaller in the lower portion than the upper portion of the housing 21 shown in FIG. Is.

In the present embodiment, at least a part of the plurality of fixed blades 17 includes an extension portion 12 and a leg portion 13 extending from the outer peripheral end of the extension portion 12 in the direction of the orifice 9. Is held by the orifice 9 or the casing. Therefore, even when the stationary blade 8 is pushed and displaced in the direction of the moving blade 5, the extension portion 12 and the leg portion 13 absorb the displacement, and the moving blade 5 and the stationary blade 8 are deformed or damaged. Can be prevented. And since the extension part 12 is provided only in some fixed blades 17 instead of all the fixed blades 17, the loss of the flow by providing the extension part 12 is not the whole fixed blades 17, Since it remains in a part, the efficiency improvement in the stationary blade 18 having the fixed hub 16 and the fixed blade 17 is not hindered.

Furthermore, by placing the fixed blade 17x provided with the extension 12 in the lower part in the gravity direction, a sufficient strength for holding the stationary blade 18 on the support frame 11 can be secured.

As described above, the blower according to the present embodiment has a fixed blade as a moving blade when the stationary blade is strongly pressed toward the moving blade side, while achieving both improved aerodynamic performance and higher efficiency. It is possible to prevent the moving blades and the stationary blades from being deformed or damaged. In addition, the outdoor unit equipped with the blower of this embodiment achieves power saving and low noise, while the stationary blade comes into contact with the moving blade when the blowing grill is pushed strongly toward the moving blade side. It is possible to prevent the moving blade and the stationary blade from being deformed or damaged.

(Third embodiment)
Hereinafter, a blower according to a third embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

In the description of the present embodiment, the same components as those in the first embodiment of the present invention or the second embodiment of the present invention are denoted by the same reference numerals and description thereof is omitted.

Hereinafter, only differences between the present embodiment and the first embodiment of the present invention and the second embodiment of the present invention will be described.

As shown in FIG. 10, the front edge 7 c of the fixed blade 7 is configured to be upstream of the rear edge 7 d of the fixed blade 7. For this reason, when the blower 1 is viewed from the discharge side, the front edge 7c of the fixed blade 7 is located above the rear edge 7d 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 7c of the fixed blade 7 is positioned below the rear edge 7d. 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.

In the region substantially below the rotary shaft 2 shown in FIG. 1, the outer peripheral end 7 b of the fixed blade 7 front edge 7 c or rear edge 7 d is positioned below the fixed hub side end 7 a of the same fixed blade 7. It becomes. 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. Therefore, the region where the outer peripheral end 7b of the front edge 7c or the rear edge 7d of the fixed blade 7 is located below the fixed hub side end 7a of the same fixed blade 7 is offset from the outer peripheral end 7b to the height of the rotary shaft 2. It is below the height of the added distance.

As shown in FIG. 10, the eleven fixed blades 7 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, in a region (region X1 surrounded by a broken line in FIG. 10) 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 blades 5 is clockwise, the fixed blades 7 are connected to each other. 11 is provided with eleven fixed blades 7 so that the interval (pitch) is large, and the other intervals are equal (equal pitch).

The pitch of the fixed blades 7 close 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.

The front edge 7c, which is the edge on the suction side of the fixed blade 7, is linearly formed from the fixed hub side end 7a which is the end on the fixed hub 6 side to the outer peripheral end 7b which is the end on the outer peripheral side. Further, the rear edge 7d, which is the edge on the discharge side of the fixed blade 7, is configured in a curved shape from the fixed hub side end 7a to the outer peripheral end 7b. The rear edge 7d has a curved shape that is recessed in the central portion 7m in the direction of the front edge 7c.

The stationary blade 8 shown in FIG. 1 having the fixed hub 6 and the fixed blade 7 has a front edge 7c below the rear edge 7d among the plurality of fixed blades 7, and at least a part of the outer peripheral end 7b is a fixed hub side end. The fixed blade 7 to be located in a region below the region 7a (region X2 surrounded by a broken line in FIG. 2) is provided with an outer peripheral end 7b of the fixed blade 7 below the central portion 7m of the same fixed blade 7. ing.

That is, among the plurality of fixed blades 7, the front edge 7c is located below the rear edge 7d, 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 7c or the rear edge 7d.

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.

In addition, as shown in FIG. 10, the length (the radial direction length of the extension part 12) which the extension part 12 connects with the fixed blade | wing 7 and the support frame 11 changes with positions where the fixed blade | wing 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.

As described above, the blower and the stationary blade 8 in the present embodiment are configured so that the fixed blade 7 has a fixed blade 7 in a region where the front edge 7c of the fixed blade 7 is positioned below the rear edge 7d (region on the left side of the fixed hub 6 in FIG. 10). The pitch is larger than the pitch of the fixed blade 7 in the region where the front edge 7c of the fixed blade 7 is located above the rear edge 7d (the region on the right side of the fixed hub 6 in FIG. 10).

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 7 c is below the rear edge 7 d 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.

Therefore, the fixed blade 7 having the front edge 7c below the rear edge 7d and at least a part of the outer peripheral end 7b below the fixed hub side end 7a has a horizontal portion at the front edge 7c or the rear edge 7d. 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. 11 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. 11 in which the rotating direction of the moving blade 5 is clockwise when viewed from the discharge side, the stationary blade 7 on the right side of the stationary hub 6 among the stationary blades 7 of the stationary blade 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 5. However, what is on the left side is inclined upward from the leeward side toward the leeward side, so that water droplets falling from above may flow down in the direction of the moving blade 5.

When the water droplets falling from above are melted snow or the like, the stationary blades 7 not only flow down toward the windward side, that is, in the direction of the moving blades 5 but grow as icicles and interfere with the moving blades 5. As a result, abnormal noise may be generated, or the moving blade 5 may be stopped or damaged.

In FIG. 11, of the water droplets that have fallen from above, the one that flows in the direction of the moving blade 5 is a water droplet that is less likely to flow in the left-right direction of the fixed blade 7 (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 7c of the fixed blade 7 is horizontal (front edge horizontal portion 7e) or a portion where the rear edge 7d is horizontal (rear edge horizontal portion 7f).

Such a horizontal portion is likely to occur when the entire front edge 7c or rear edge 7d of the fixed blade 7 is horizontal or curved when viewed from the discharge side. In particular, the leading edge 7c or the trailing edge 7d 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. 10, the fixed blade 7 has a large pitch in a region where the front edge 7c of the fixed blade 7 is located below the rear edge 7d. 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.

And since the front edge 7c or the rear edge 7d 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 7c formed in a curved shape, a front edge 7c below the rear edge 7d, and at least a part of the outer peripheral end 7b 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. 10), it is possible to eliminate a horizontal portion where water droplets easily collect.

11 except for the two stationary blades 7 on the left side of the fixed hub 6 and having the front edge horizontal portion 7e or the rear edge horizontal portion 7f, 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.

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, the two fixed blades 7 are removed from the stationary blade having the configuration shown in FIG. 11, 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. is doing. 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 that of the region on the right side of the fixed hub 6, the region on the left side of the fixed hub 6 can also be set to an equal pitch. 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 become the arrangement | positioning of the fixed blade | wing which does not produce a horizontal part.

In the present embodiment, the front edge 7c of the fixed blade 7 is linear and the rear edge 7d is curved. However, from the viewpoint of not providing a place where water droplets are likely to collect, the front edge 7c is curved. The trailing edge 7d may be linear.

And the outdoor unit in which the air blower in this Embodiment is mounted can prevent the fixed blade | wing 7 of the shape where water flows in the direction of the moving blade 5 having a horizontal part. 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 blade 7 of the stationary blade 8 and the blowing grill 25 (refer to FIG. 6 below) are not directly fixed, but are fixed to the casing 21, so that they are dropped. Even if an external force is applied to the blowing grill 25 due to the artificial pressure from the front, 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, The positional relationship between the stationary blade 7 of the stationary blade 8 and the orifice 9 does 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.

(Fourth embodiment)
Hereinafter, a blower according to a fourth embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

In the description of this embodiment, the same components as those in the first embodiment of the present invention, the second embodiment of the present invention, or the third embodiment of the present invention are denoted by the same reference numerals. The description is omitted.

Hereinafter, only differences between the present embodiment and the first embodiment of the present invention, the second embodiment of the present invention, or the third embodiment of the present invention will be described.

FIG. 12 is a front view seen from the discharge side of the blower in the fourth embodiment of the present invention. Note that in this embodiment, the same components as those in the other embodiments are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 8, a stationary blade 8 having a fixed hub 6 and twelve fixed blades 7 provided around the fixed hub 6 is provided on the discharge side (downstream side) of the moving blade 5. Yes. In the stationary blade 8, the pitch of the stationary blades 7 is other than the rotation axis 2 (hereinafter referred to as FIG. 1) on the left side of the rotation shaft 2 (refer to FIG. 1) and the center in the vertical direction. It is comprised so that it may become twice the pitch of the fixed blade | wing 7 in an area | region. 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 27 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 27 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 27 is a shape which does not provide a horizontal part from the center part 27m of a fixed blade | wing to the outer peripheral end 7b.

More specifically, the shape between the central portion 27m of the fixed blade 27 and the fixed hub side end 27a is the same shape as the other fixed blades 7, and the shape between the central portion 27m and the outer peripheral end 27b is different. . The rear edge 27d of the fixed blade 27 is configured in a curved shape between the central portion 27m of the fixed blade 27 and the fixed hub side end 27a, but is linear between the central portion 27m and the outer peripheral end 27b. Is formed.

The meridian height h2 of the fixed blade 27 is the same as the meridian surface height h2 of the other 11 fixed blades 7 (refer to FIG. 1 hereinafter), and is constant from the fixed hub side end 27a to the outer peripheral end 27b. It is. The blade mounting angle θ of the fixed blade 27 (refer to FIGS. 3A and 3B below) is the same as the blade mounting angle θ of the other 11 fixed blades 7, and the blade on the outer peripheral end 27b side from the central portion 27m. The mounting angle θb is made larger than the blade mounting angle θa on the fixed hub side end 27a side from the central portion 27m.

Therefore, the front edge 27c of the fixed blade 27 is linearly formed between the central portion 27m of the fixed blade 27 and the fixed hub side end 27a, like the other 11 fixed blades 7. Between the central portion 27m and the outer peripheral end 27b, a curved shape is formed.

Alternatively, if the stationary blades 18 having the same shape are arranged in the region X1 at the same pitch as the stationary blades 7 provided in the region other than the region X1 shown in FIG. 10, the stationary blade 18 is as follows. That is, in the fixed blade 7 in which at least a part of the central portion 7m of the fixed blade 7 is located below the outer peripheral end 7b of the same fixed blade 7, there are many places where the front edge 7c or the rear edge 7d is horizontal. The configuration is such that one of the stationary blades is removed, and a part of the shape of the stationary blade of one of the fewer horizontal portions is corrected. In the present embodiment, as shown in FIG. 12, the shape of at least one of the fixed blades 7 in a region where the front edge 7c of the fixed blade 7 is located below the rear edge 7d 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 7c, the front edge 27c, the rear edge 7d, and the rear edge 27d of the fixed blade 7 and the fixed blade 27 on the left side of the fixed hub 6 do 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.

In addition, one stationary blade 27 other than the two stationary blades 7 on the left side of the stationary hub 6 and having the front edge horizontal portion 7e or the rear edge horizontal portion 7f is removed from the stationary blade having the configuration shown in FIG. Partially modified the shape, the horizontal part of the trailing edge 27d was changed to a part where the slope changes on the left and right sides, so that there was no horizontal part and the part was inclined to one side. For this reason, the water droplets flow in the left-right direction (in the direction of the outer peripheral end 27b or the fixed hub side end 27a) without stagnation, so that an ice column toward the moving blade 5 grows and interferes with the moving blade 5 to generate abnormal noise. The rotor blade 5 does not stop or break. 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.

In addition, the shape modification from the fixed blade 7 to the fixed blade 27 has modified the curved shape formed by the trailing edge 7d of the fixed blade 7, but the meridian surface height h2 in FIG. 1 and the blade mounting angle in FIGS. 3A to 3C. θ is not changed. For this reason, the shape of the front edge 27c of the fixed blade 27 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 8 to collect 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 7c of the fixed blade 7 is linear and the rear edge 7d is curved. However, from the viewpoint of not providing a place where water droplets are likely to collect, the front edge 7c is curved. The trailing edge 7d may be linear. In this case, the fixed blade 27 whose shape is changed is linear between the central portion 27m of the front edge 27c and the fixed hub side end 27a, and is curved between the central portion 27m and the outer peripheral end 27b. In addition, a curved shape may be formed between the central portion 27m of the rear edge 27d and the fixed hub side end 27a, and a linear shape may be formed between the central portion 27m and the outer peripheral end 27b.

As described above, the blower according to the present embodiment can prevent the fixed blade 7 arranged in a shape such that water flows 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 in the fixed blade | wing 7 or the fixed blade | wing 27, or an icy pillar generate | occur | produces or grows. 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.

Further, 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 present invention provides a moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, an orifice provided on the outer peripheral side of the moving blade, and a moving blade. And a stationary blade having a fixed hub and a plurality of fixed blades provided around the fixed hub. In addition, the fixed blade has a blade attachment angle with respect to a surface perpendicular to the rotation axis on the outer peripheral side from the central portion in the radial direction of the fixed blade, and a blade attachment angle on the fixed hub side from the central portion in the radial direction of the fixed blade. I tried to get bigger.

With this configuration, the main flow of the air flow discharged from the rotor blades is concentrated, and the swirl direction component becomes large.The collision loss at the stationary blade inlet of the stationary blade is reduced from the center of the stationary blade stationary blade. It can be kept small. For this reason, a turning direction component can be efficiently recovered to a static pressure.

Further, according to the present invention, the blade mounting angle of the fixed blade is maximized between the central portion in the radial direction of the fixed blade and the outer peripheral end.

With this configuration, the blade mounting angle at the outer peripheral end of the fixed blade is slightly smaller than the blade mounting angle from the center to the outer peripheral side, so the collision loss at the inlet of the fixed blade is kept small at the outer peripheral end of the fixed blade. be able to. For this reason, the swirl direction component can be efficiently recovered to the static pressure from the center portion of the fixed blade to the outer peripheral side and further to the outer peripheral end.

Further, in the present invention, the blade mounting angle at the outer peripheral end of the fixed blade is made smaller than the blade mounting angle at the central portion in the radial direction of the fixed blade.

This configuration makes it possible to reduce the collision loss at the fixed blade inlet at the outer peripheral edge of the fixed blade. For this reason, the swirl direction component can be efficiently recovered to the static pressure from the center to the outer periphery of the fixed blade, and the swirl can be efficiently swung even at the outer peripheral end affected by the leakage flow of the rotating blades of the rotor blade and the tip vortex. Directional components can be recovered to static pressure.

Further, in the present invention, the meridional surface height, which is the height projected by the fixed blade from the fixed hub side to the outer peripheral end on the plane including the rotation axis, is constant.

With this configuration, the chord length can be suppressed without extending from the fixed hub side to the outer peripheral side of the fixed blade, so that it is possible to suppress an increase in the surface friction loss of the fixed blade and an increase in loss due to an increase in the wake width of the wake. In addition, since the chord length can be kept near the outer peripheral edge of the fixed blade without increasing the length, the rotor blade and orifice, which are easily affected when the chord length at the outer peripheral edge is long (when the meridian height is high), The influence of the leakage flow between the blades and the tip vortex generated at the tip of the rotor blade can be minimized. For this reason, it is possible to recover the swirl direction component of the air flow at the outer peripheral end of the fixed blade to a static pressure while suppressing an increase in loss due to turbulence.

Further, according to the present invention, the stationary blade is inclined in the counter-rotating direction of the moving blade with respect to the stationary hub side on the plane perpendicular to the rotation axis.

With this configuration, when the air flow discharged from the moving blade passes through the stationary blade of the stationary blade, the air flow passes at different timings for each position in the radial direction. The amount of noise can be reduced.

The present invention also provides a moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, an orifice provided on the outer peripheral side of the moving blade, and a discharge side of the moving blade. And a stationary blade having a fixed hub and a plurality of fixed blades provided around the fixed hub. In addition, the orifice includes a minimum diameter portion where the gap with the outer peripheral end of the rotary blade is minimum, and a discharge side opening provided on the discharge side of the minimum diameter portion and having a diameter larger than the minimum diameter portion. Furthermore, the fixed blade is provided so that the axial position of the outer peripheral end of the front edge, which is the edge on the suction side of the fixed blade, is located between the smallest diameter portion of the orifice and the discharge side opening.

With this configuration, before the discharge airflow in the region from the outer peripheral side to the outer peripheral end of the moving blade moves toward the flow having the radial component as it moves toward the discharge-side opening of the orifice, It will flow between the wings. For this reason, the flow can be forcibly converted in the axial direction and can be efficiently recovered to a static pressure.

In the present invention, a predetermined gap is provided between the outer peripheral end of the leading edge and the orifice.

By adopting this configuration, a slight leakage flow is intentionally generated from the pressure surface side to the suction surface side of the leading edge of the stationary blade, so that the trailing edge, which is the edge on the blowout side near the outer peripheral edge of the stationary blade. Since it can suppress that the flow which is not converted into a static pressure generate | occur | produces, it can collect | recover static pressure efficiently.

Further, the present invention, at least a part of the plurality of fixed blades provided on the stationary blade, is provided with an extended portion that extends in the radial direction only the rear edge side of the outer peripheral end, the stationary blade via the extended portion, It is held in a casing that holds the orifice.

With this configuration, even if the extension is provided, the flow of air flowing into the front edge side of the fixed blade is not disturbed, so that the flow loss can be minimized. For this reason, the stationary blade can be held in the casing that holds the orifice without hindering the improvement in efficiency due to the static pressure recovery in the stationary blade. Moreover, the loss of the flow in an extension part can be made still smaller by providing an extension part in a part instead of all of a plurality of fixed blades.

The present invention also provides a moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, provided on the discharge side of the moving blade, and provided around the fixed hub and the fixed hub. A stationary blade having a plurality of fixed blades. The stationary blade has a trailing edge in which the fixed blade provided in the region where the leading edge of the fixed blade is located below the trailing edge is the leading edge, which is the suction side edge of the fixed blade, and the blowing side edge. It is larger than the interval between the fixed blades provided in the region located above.

This configuration can reduce the number of spots where water droplets tend to collect from the fixed blades in the region where water flows in the direction of the moving blades. 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 the moving blades.

The present invention also provides a moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, provided on the discharge side of the moving blade, and provided around the fixed hub and the fixed hub. A stationary blade having a plurality of fixed blades. Further, 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 shape of the fixed blade provided in a region where the front edge of the fixed blade is located above the rear edge. And different. In addition, a horizontal portion is not provided from the center portion to the outer peripheral end of the fixed blade.

This configuration can reduce the horizontal part where water droplets tend to collect from the fixed blades in the region where water flows in the direction of the moving blades. 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.

Further, according to the present invention, at least one of the front edge or the rear edge of the plurality of fixed blades is formed in a curved shape, and among the plurality of fixed blades, the front edge is below the rear edge, and at least one of the outer peripheral ends. An outer peripheral end of the fixed blade of which the portion is below the fixed hub side end is provided below the central portion of the fixed blade.

This configuration eliminates the horizontal part where water droplets tend to collect on the fixed blade.

In addition, the present invention comprises, among the plurality of fixed blades, a fixed blade whose front edge is below the rear edge in the same shape as the fixed blade whose front edge is above the rear edge, and At least a part of the fixed blades that are positioned below the outer peripheral edge of the fixed blade is not provided.

With this configuration, it is possible to prevent water droplets from accumulating on the fixed blade while minimizing the reduction in the number of stationary blades and maintaining the maximum effect of the stationary blade.

Further, according to the present invention, the fixed blade not provided with the horizontal portion is configured with the same shape as the fixed blade whose front edge is above the rear edge, among the plurality of fixed blades, whose front edge is below the rear edge. In addition, 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.

This configuration makes it possible to prevent water droplets from accumulating on the fixed blades while minimizing the number of fixed blades having different shapes and maintaining the effect of the stationary blades to the maximum.

Also, in the present invention, the mounting angle of the fixed blade without the horizontal portion is the same as the mounting angle of the other fixed blades.

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

The present invention also provides a moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, an orifice provided on the outer peripheral side of the moving blade, and a discharge side of the moving blade. And a stationary blade having a fixed hub and a plurality of fixed blades provided around the fixed hub. Further, the stationary blade is provided with an annular support frame around the rotation axis on the outer periphery thereof, and the support frame and the orifice are fixed.

This configuration can prevent the stationary blade from coming into contact with the moving blade when the stationary blade is strongly pressed toward the moving blade, and the deformation or damage of the moving blade or the stationary blade.

Further, according to the present invention, at least a part of the plurality of fixed blades provided on the stationary blade includes an extension portion extending only in the radial direction only at the rear edge side of the outer peripheral end, and the direction from the outer peripheral end of the extension portion toward the orifice. The stationary blade is held by the orifice through the extension portion and the leg portion.

With this configuration, it is possible to prevent the fixed blade from contacting the moving blade and deforming or damaging the moving blade or the stationary blade, while suppressing an increase in input and noise increase due to an increase in resistance of the flow near the outer periphery of the fixed blade. .

In the present invention, the fixed blade and the support frame are integrally formed.

This configuration increases the strength of the fixed blade and the support frame, and prevents the fixed blade from coming into contact with the moving blade and deforming or damaging the moving blade or the stationary blade.

Further, the present invention is an outdoor unit equipped with the blower of the present invention mentioned above. With this configuration, the outdoor unit can prevent the stationary blades and the blowing grille from coming into contact with the moving blades and deforming or damaging the moving blades and the stationary blades.

As described above, since the blower having the configuration according to the present invention can achieve both improvement in aerodynamic performance and high efficiency, air conditioning equipment for home and commercial use air conditioners, home refrigerator refrigerators and vending machines. It can be applied not only to refrigeration equipment such as refrigeration equipment, heat pump equipment such as water heaters, and electronic equipment having thermoelectric components, but also to AV equipment and waste heat recovery equipment.

DESCRIPTION OF SYMBOLS 1 Blower 2 Rotating shaft 3 Rotating hub 4 Rotating blade 4a Rotating blade trailing edge 5

Rotor blade

6,16

Fixed hub

7, 17, 17x, 17y, 27

Fixed blade

7a, 17a, 27a Fixed

hub side end

7b, 17b,

27b End

7c, 17c,

27c Leading edge

7d, 17d, 27d Trailing edge 7e Leading edge horizontal part 7f Trailing edge

horizontal part

7m, 17m,

27m Center part

8, 18 Stator blade 9 Orifice 9x Minimum diameter part 9y Discharge side opening 9z Suction Side opening portion 10 Motor 11 Support frame 12 Extension portion 12a Extension portion rear edge 12b Extension portion front edge 13 Leg portion 21 Case 21a Front portion 22 Compressor 23 Outdoor heat exchanger 24 Motor fixture 25 Blowing grill

Claims

A moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, an orifice provided on an outer peripheral side of the moving blade, and provided on a discharge side of the moving blade, A stationary blade having a stationary hub and a plurality of stationary blades provided around the stationary hub,
The fixed blade has a blade attachment angle with respect to a plane perpendicular to the central axis of the stationary blade on the outer peripheral side from the central portion in the radial direction of the fixed blade. The blower is characterized in that it is larger than the blade mounting angle at.
The blower according to claim 1, wherein a blade mounting angle of the fixed blade is maximized between a central portion in the radial direction of the fixed blade and an outer peripheral end.
The blower according to claim 1, wherein a blade attachment angle at an outer peripheral end of the fixed blade is formed to be smaller than a blade attachment angle at a central portion in the radial direction of the fixed blade.
The meridional surface height, which is the height of the fixed blade, which is the height projected from the fixed hub side to the outer peripheral end on the plane including the central axis of the stationary blade, is constant. Blower.
A moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, an orifice provided on an outer peripheral side of the moving blade, and provided on a discharge side of the moving blade, A stationary blade having a stationary hub and a plurality of stationary blades provided around the stationary hub,
The orifice includes a minimum diameter portion where a gap between the orifice and the outer peripheral end of the rotary blade is minimized, and a discharge side opening provided on the discharge side of the minimum diameter portion and having a diameter larger than the minimum diameter portion. ,
The fixed blade is provided such that an axial position of an outer peripheral end of a front edge which is an edge on the suction side of the fixed blade is located between the minimum diameter portion and the discharge side opening. Blower.
The blower according to claim 5, wherein the fixed blade is provided so as to have a predetermined gap between an outer peripheral end of a front edge of the fixed blade and the orifice.
At least a part of the plurality of fixed blades provided on the stationary blade is provided with an extension portion that extends in a radial direction only at a rear edge side that is a blow-off edge of an outer peripheral end, and the stationary blade includes the extension portion. It is hold | maintained through the housing | casing which hold | maintains the said orifice, The air blower of Claim 5 characterized by the above-mentioned.
A moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, a plurality of rotating blades provided on the discharge side of the moving blade and provided around the fixed hub and the fixed hub A stationary blade having a fixed blade of
The stationary blade has an interval between the fixed blades provided in a region where a leading edge which is an edge on the suction side of the fixed blade is located below a rear edge which is an edge on the outlet side. The blower characterized by being larger than the space | interval of the said fixed blade | wing provided in the area | region located above a rear edge.
A moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, a plurality of rotating blades provided on the discharge side of the moving blade and provided around the fixed hub and the fixed hub A stationary blade having a fixed blade of
The shape of at least one of the fixed blades provided in the region where the front edge of the fixed blade is located below the rear edge is the fixed blade provided in the region where the front edge of the fixed blade is located above the rear edge. A blower characterized in that a horizontal portion is not provided from the center portion to the outer peripheral end, in addition to the shape of the 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, the front edge is below the rear edge, and at least a part of the outer peripheral end is fixed. The blower according to any one of claims 8 and 9, wherein the fixed blade located below the hub side end has an outer peripheral end of the fixed blade provided below the central portion of the fixed blade.
Among the plurality of fixed blades, the fixed blade whose front edge is below the rear edge is configured in the same shape as the fixed blade whose front edge is above the rear edge, and at least a part of the central portion of the fixed blade is The blower according to any one of claims 8 and 9, wherein the blower is not provided with a fixed blade that is positioned below an outer peripheral end of the fixed blade.
The fixed blade not provided with the horizontal portion is configured with the same shape as the fixed blade whose front edge is above the rear edge, among the plurality of fixed blades, the fixed blade whose front edge is lower than the rear edge, and The blower according to claim 9, wherein at least a part of a central portion of the fixed blade is a fixed blade that is positioned below the outer peripheral end of the fixed blade.
A moving blade having a rotating hub having a rotating shaft and a plurality of rotating blades provided around the rotating hub, an orifice provided on the outer peripheral side of the moving blade, and a discharge side of the moving blade, fixed A stationary blade having a hub and a plurality of stationary blades provided around the stationary hub, and the stationary blade includes an annular support frame centering on a rotation axis on an outer periphery thereof, and the support frame and the A blower characterized in that an orifice is fixed.
At least a part of the plurality of fixed blades provided on the stationary blade includes an extension portion extending only in a radial direction at a rear edge side of the outer peripheral end, and a leg portion extending from the outer peripheral end of the extension portion toward the orifice. The blower according to claim 13, wherein the stationary blade is held by the orifice through the extension portion and the leg portion.
The outdoor unit which mounts the air blower of any one of Claim 1, 5, 8, 9, and 13.