WO2014199589A1

WO2014199589A1 - Fan and air conditioner using same

Info

Publication number: WO2014199589A1
Application number: PCT/JP2014/002929
Authority: WO
Inventors: 憲昭山本; 酒井　浩一; 正春海老原; 清水　昭彦; 智貴森川
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2013-06-10
Filing date: 2014-06-03
Publication date: 2014-12-18
Also published as: JPWO2014199589A1; CN105247221B; CN105247221A; JP6398086B2

Abstract

This fan has: a crossflow fan; a stabilizer disposed facing the crossflow fan; a rear guider that forms an airflow pathway with respect to the stabilizer; and a side wall disposed in a direction perpendicular to the rotational axis of the crossflow fan. A protrusion is formed protruding to the stabilizer side compared to the central section of the rear guider across a predetermined range of the axial direction with respect to the rotational axis of the crossflow fan from the tip at the output side of the rear guider. As a result, it is possible to secure to the fullest extent an airflow pathway at the central section at which the flow is stable and the air speed is fast, and meanwhile it is possible to stabilize flow and increase static pressure in the vicinity of the side wall at which the flow is unstable and the air speed is slow.

Description

Blower and air conditioner using the same

The present invention relates to a blower and an air conditioner using the blower.

FIG. 11 is a cross-sectional view of a conventional cross flow blower and an indoor unit of an air conditioner using the blower. FIG. 12 is a perspective view showing the vicinity of the side wall of the indoor unit.

11 and 12, in the blower, an air ventilation path is formed by the cross flow fan 102, the rear guider 103, and the stabilizer 104 including the plurality of blades 101. The axial ventilation path is restricted by the left and right side walls 105 arranged in the direction perpendicular to the rotation axis of the cross flow fan 102.

If it is an air conditioner, the air passes through the suction grill 106, the filter 107 and the heat exchanger 108 and flows into the cross flow fan 102. Further, the air flowing into the cross flow fan 102 passes through a ventilation path (diffuser) 109 formed by the rear guider 103, the stabilizer 104, and the side wall 105, and is discharged from the blowout portion of the blower.

Generally, in the cross flow fan having the above-described configuration, the flow of air blown out from the cross flow fan 102 is formed in a two-dimensional flow at the axial center of the cross flow fan 102 in the ventilation path 109. On the other hand, in the vicinity of the side wall 105, the two-dimensional flow of air is disrupted due to the viscosity of the fluid. Therefore, in the vicinity of the side wall 105, there is a problem that the fluctuation component of the air flow increases and the noise of the blower increases.

Further, in the air conditioner, the flow rate of the air is stalled due to the resistance of the heat exchanger 108 and the filter 107, and a further two-dimensional flow disruption is generated in the vicinity of the side wall 105. Therefore, separation of the air flow occurs intermittently, resulting in an unsteady flow, and there is a problem that the flow performance of the cross flow fan 102 is greatly reduced and further noise is increased.

In response to these problems, the shape of the side wall is changed so that the ventilation path in the rotational axis direction of the crossflow fan 102 is gradually reduced in the ventilation path 109 from the blowing section of the crossflow fan 102 to the blowing section of the blower. Has been proposed (see, for example, Patent Document 1). As a result, separation of the flow in the vicinity of the side wall is suppressed, and noise is reduced by stabilizing the flow.

Japanese Patent Application Laid-Open No. 08-121396

The above configuration described in Patent Document 1 is effective for generating abnormal noise during low airflow operation. However, particularly under a large air volume condition such as during high-capacity operation, the configuration described in Patent Document 1 causes a large resistance in the ventilation path. As a result, there has been a problem that the power consumption of the fan motor which is the power of the cross flow fan is increased.

The present invention solves the above-described conventional problems, and reduces noise in the vicinity of the side wall and at the same time improves the air volume performance of the entire air conditioner, and has a high energy-saving performance blower and an air conditioner using the blower. The purpose is to provide a machine.

In order to achieve the above object, a blower according to the present invention includes a cross flow fan, a stabilizer disposed opposite the cross flow fan, a rear guider that forms a ventilation path between the stabilizer, and a cross flow fan. A side wall disposed in a direction perpendicular to the rotation axis, and on the outlet side of the rear guider, on the stabilizer side compared to the center part of the rear guideer over a predetermined range from the end portion in the axial direction of the rotation shaft. The protruding part which protrudes is formed.

Thereby, the width of the ventilation path in the region where the projecting portion is formed is narrower than the ventilation path in the central portion. As a result, it is possible to stabilize the flow by suppressing separation of the air flow in the vicinity of the side wall and to reduce noise.

According to the present invention, it is possible to secure air flow performance in the vicinity of the central portion and the side wall on the exit side of the rear guider, and at the same time to stabilize the flow by suppressing separation of the air flow in the vicinity of the side wall, thereby reducing abnormal noise. It becomes possible. Thereby, a low noise and high energy-saving blower and an air conditioner using the blower can be provided.

FIG. 1 is a perspective view showing an indoor unit of an air conditioner using a blower according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the indoor unit. FIG. 3 is an enlarged schematic view of the outlet of the indoor unit. FIG. 4 is a perspective view of the vicinity of the right side wall of the outlet of the indoor unit. FIG. 5 is a sectional view taken along line 5-5 in FIG. 3 in the vicinity of the right side wall of the outlet of the indoor unit. FIG. 6 is a plan view of the outlet of the indoor unit as viewed from an angle perpendicular to the rear guider at the outlet of the outlet. FIG. 7 is a graph showing the relationship between the axial length (L) from the end of the protruding portion and the air volume in the rear guider of the same indoor unit. FIG. 8 is a graph showing the relationship between the angle (D1) of the step portion and the air volume in the rear guider of the same indoor unit. FIG. 9 is a diagram illustrating the positional relationship between the left and right section change blades and the protrusions of the air conditioner using the blower according to Embodiment 2 of the present invention. FIG. 10 is a diagram illustrating a stabilizer of an air conditioner using a blower according to Embodiment 3 of the present invention. FIG. 11 is a cross-sectional view showing a conventional blower and an indoor unit of an air conditioner using the blower. FIG. 12 is a perspective view showing the vicinity of the side wall of the indoor unit.

The first invention includes a cross flow fan, a stabilizer disposed opposite to the cross flow fan, a rear guider that forms an air passage between the stabilizer, and a direction perpendicular to the rotation axis of the cross flow fan And a side wall disposed on the outlet side of the rear guider, the protrusion projecting from the end part toward the stabilizer side over the predetermined range in the axial direction of the rotating shaft from the center part of the rear guider. The part is formed. Thereby, the width | variety of the ventilation path of the area | region in which the protrusion part is formed becomes narrower than the ventilation path in a center part.

With such a configuration, it is possible to maximize the ventilation path composed of the stabilizer and the rear guider in the central portion where the wind speed is fast and the flow is stable. And the static pressure can be improved near the side wall where the wind speed is slow and the flow is unstable, and the flow can be stabilized. Therefore, it is possible to achieve both improvement in air volume performance and reduction in noise due to separation of the flow in the vicinity of the side wall.

A second invention is the first invention, further comprising a plurality of left and right wind direction changing blades that are rotatably provided downstream of the rear guider, and that change the left and right direction of the blowout wind. The step portion to be connected is arranged in a region corresponding to the blade on the side wall side among the plurality of left and right wind direction changing blades.

This makes it possible to minimize the area where noise is prevented by narrowing the ventilation path, and to ensure the central area where the air volume is large.

The third invention satisfies R / 5 ≦ L ≦ 3R, where L is the axial length of the protrusion and R is the radius of the crossflow fan in the first invention.

By adopting such a configuration, it is possible to widen the ventilation path, to appropriately secure the central area where the air volume is large, and to appropriately secure the area that stabilizes the flow near the side wall.

According to a fourth invention, in the first invention, a line connecting the rear guider and the closest point of the crossflow fan from the center point of the crossflow fan, and a line connecting the blowout part of the rear guider from the center point of the crossflow fan. Assuming that the angle formed is X, X satisfies 80 ° ≦ X ≦ 130 °, and the stabilizer has the same shape in the axial direction up to the position where X satisfies the above formula, and exceeds the angle satisfying the above formula. A protruding portion is formed in the region.

With this configuration, in the region where the flow from the closest point of the cross flow fan and rear guider to the outlet is unstable, the cross flow fan's axial rear guider shape can be the same and the flow can be stabilized. It becomes. Furthermore, it is possible to appropriately narrow the ventilation path from the region where the wind speed is slow and flow separation occurs near the side wall.

In a fifth aspect based on the first aspect, the stepped portion gradually decreases in height from the protruding portion to the central portion.

By adopting such a configuration, it is possible to suppress separation of the air flow at the step portion.

In a sixth aspect based on the first aspect, the inclination angle of the stepped portion is 60 degrees or less.

According to a seventh aspect, in the first aspect, a protruding portion is formed on the outlet side of the stabilizer so as to protrude from the end portion toward the rear guider side as compared with the central portion of the stabilizer over a predetermined axial range. .

By adopting such a configuration, it is possible to appropriately secure the air volume while preventing noise generation on the stabilizer side.

The eighth invention is an air conditioner in which a heat exchanger and the blower according to any one of the first to seventh inventions are provided in a main body having a suction port and a blowout port.

With such a configuration, an air conditioner with low noise and high air volume performance can be provided.

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

(Embodiment 1)
FIG. 1 is a perspective view showing an indoor unit of an air conditioner using a blower according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the indoor unit.

1 and 2, a main body 1 of an indoor unit of an air conditioner includes a blower having a cross flow fan 3, a rear guider 5, and a stabilizer 4 between a suction port 1a and a blower port 1b, and a heat exchanger 2. With. The cross flow fan 3 is operated to take in indoor air from the suction port 1a, and blow out the air heat-exchanged by the heat exchanger 2 from the blower port 1b.

In the ventilation path 13 from the crossflow fan 3 to the outlet 1b, a stabilizer 4, a rear guider 5 that forms a bottom wall from the back side of the crossflow fan 3 to the outlet 1b, left and right side walls (not shown), and The cross section is substantially arc-shaped, and upper and lower blades 6 for controlling the vertical direction of the blown air are formed.

The term “stabilizer” described above is a member located near the downstream of the crossflow fan 3 and having a curved surface shape for stabilizing vortices generated near the front of the crossflow fan 3, and downstream of the member. It means that includes both the wall portion that is located on the side and that forms the upper side of the ventilation path of the air conveyed by the crossflow fan 3. A ventilation path 13 is formed by the rear guider 5, the stabilizer 4, and the side wall (not shown).

FIG. 3 is an enlarged schematic view from the cross flow fan 3 to the outlet 1b. FIG. 4 is a perspective view of the vicinity of the right side wall of the outlet of the indoor unit. FIG. 5 is a sectional view taken along line 5-5 in FIG. 3 in the vicinity of the right side wall. FIG. 6 is a plan view seen from an angle perpendicular to the rear guider 5 at the outlet of the outlet.

In the present embodiment, on the outlet side of the rear guider 5, a protrusion that protrudes toward the stabilizer 4 side from the end portion 5 c in the rotational axis direction of the cross flow fan 3 compared to the central portion 5 a 1 of the rear guider 5. Part 5a2 is formed. In other words, the cross-sectional shape of the flow path from the vicinity of the side wall 12 to the outlet side of the rear guider 5 outlet of a certain length with respect to the axial direction of the cross flow fan 3 is the flow path from the rear side of the rear guider outlet of the central portion 5a1. The flow path is narrower than the cross-sectional shape.

Thereby, the width of the ventilation path 13 in the region where the projecting portion 5a2 is formed is narrower than the ventilation path 13 in the central portion 5a1 (distance in a direction perpendicular to the rotation axis direction of the cross flow fan 3). As a result, in the central part 5a1 where the wind speed is fast and the flow is stable, the ventilation path can be secured to the maximum. On the other hand, in the vicinity of the side wall 12 where the wind speed is slow and the flow is unstable, it is possible to improve the static pressure and stabilize the flow. Therefore, it is possible to achieve both improvement in air volume performance and reduction in noise due to separation of the flow in the vicinity of the side wall.

On the exit side of the rear guider 5, a protruding portion 5a2, a central portion 5a1, and a step portion 5b that connects the protruding portion 5a2 and the central portion 5a1 are formed.

In the present embodiment, as shown in FIG. 3, the rear guider 5 has the same shape (including substantially the same shape) in the major axis direction of the cross flow fan 3 in the region where the angle X is less than 110 degrees. In the region where the angle X is 110 degrees or more, the protruding portion 5a2 is formed in the vicinity of the side wall 12. Here, the angle X connects the line connecting the rear guider 5 and the closest point A of the crossflow fan 3 from the center point of the crossflow fan 3 and the blowout part B of the rear guider 5 from the center point of the crossflow fan 3. It means the angle made with the line. In other words, the angle X refers to the line segment connecting the rear guider 5 and the closest point A of the cross flow fan 3 from the center point of the cross flow fan 3 to the formation start portion of the protrusion 5a2 from the center point of the cross flow fan 3. This is the angle formed by the line segment that connects.

By adopting such a configuration, it is possible to stabilize the air flow in the region where the flow from the closest point A to the outlet is unstable. At the same time, in the vicinity of the side wall 12, the flow velocity can be appropriately narrowed in a region where the wind speed becomes slow and separation occurs.

The angle X may be set appropriately according to the relative positional relationship between the crossflow fan 3, the stabilizer 4, and the rear guider 5, but is preferably set in a range of 80 ° ≦ X ≦ 130 °. If X is larger than 130 °, the region where the protrusion 5a2 is formed is too small to sufficiently improve the static pressure, and the flow cannot be stabilized. When X is smaller than 80 °, the protruding portion 5a2 becomes a resistance on the upstream side of the rear guider 5, and the amount of air flowing out from the outlet is reduced.

FIG. 7 shows the air volume when the cross flow fan 3 is fixed at the same rotational speed and the axial length L of the protruding portion 5a2 of the rear guider 5 is changed in the present embodiment. Here, R is the radius of the cross flow fan 3. In this configuration, the air volume performance reaches a peak at L = 1.3R, but depending on the characteristics of the cross flow fan and the magnitude of the ventilation resistance, the protrusion 5a2 of the rear guider 5 has a range of R / 5 ≦ L ≦ 3R. The axial length L may be adjusted as appropriate.

Also, the step H2 with respect to the central portion 5a1 of 5a2 near the left and right side walls at the tip of the outlet shown in FIG. 5 may be set according to the magnitude of the ventilation resistance.

In the present embodiment, a nozzle storage space (not shown) for the automatic filter cleaning function is secured near the right side wall. Therefore, the ventilation resistance is particularly high in the vicinity of the right side wall, and the rear guider 5 in the vicinity of the right side wall has a peak air volume performance at H2 = 0.11H1 with respect to the height H1 of the outlet of the outlet. On the other hand, in the vicinity of the left side where the draft resistance is relatively low, the air volume performance reaches a peak at H2 = 0.08H1.

In recent years, there has been a tendency to increase ventilation resistance in order to improve the efficiency of heat exchangers, such as the heat exchanger being composed of three to four rows to improve energy saving performance. Is required. For this reason, the present embodiment capable of realizing both improvement in the air volume performance of the central main air passage section and improvement of the static pressure in the vicinity of the side wall is particularly effective for air conditioners with high energy saving performance in recent years.

Further, in the present embodiment, as shown in FIGS. 4 to 6, particularly FIG. 5, the stepped portion 5b is configured to smoothly connect the protruding portion 5a2 and the central portion 5a1. Here, “smoothly” means that the height gradually decreases from the protruding portion 5a2 to the central portion 5a1. By adopting this configuration, an indoor unit of an air conditioner with high air volume performance that suppresses flow separation at the step portion 5b and particularly reduces noise is realized.

FIG. 8 shows the air flow when the cross flow fan 3 is fixed at the same rotational speed and the angle D1 (see FIG. 5) formed by the step portions 5b and 5a1 is changed. The angle D1 can be rephrased as the inclination angle of the step portion 5b.

When D1 is 90 degrees, that is, when the air volume of the shape having the stepped portion 5a1 and the central portion 5a2 is 100%, the air volume performance is improved as the angle is reduced, and the air volume performance reaches a peak when D1 is 30 degrees. .

D1 can be appropriately selected according to the step H2 of the projecting portion 5a2 with respect to the central portion 5a1, etc., but it is preferably configured at an average of 60 degrees or less in order to suppress separation of the air flow in the stepped portion 5b.

Further, in the present embodiment, the angle D1 is configured to be substantially constant, and this configuration can further suppress the flow separation at the step portion 5b.

In addition, in this Embodiment, although the structure which provides the protrusion part 5a2 in the side wall 12 vicinity of right-and-left both sides was demonstrated, you may provide the protrusion part 5a2 in either right or left.

In the present embodiment, the blower used for the indoor unit of the air conditioner has been described as an example. However, the blower can be applied to general blowers composed of a crossflow fan and a casing, and is particularly suitable for a blower having high ventilation resistance near the side wall. Useful.

(Embodiment 2)
Next, the air blower of Embodiment 2 which concerns on this invention and an air conditioner using the same are demonstrated using FIG. FIG. 9 is a diagram for explaining the positional relationship between the left and right wind direction changing blades 20 and the protrusions 5a2 of the air conditioner. In the blower of the second embodiment and the air conditioner using the blower, the same reference numerals are given to portions showing substantially the same functions and operations as those of the first embodiment, and the description thereof is omitted. The basic configuration and operation of the blower of the second embodiment and the air conditioner using the same are the same as the configuration and operation of the blower of the first embodiment and the air conditioner using the same. Therefore, in the description of the second embodiment, only the positional relationship between the left / right wind direction changing blade 20 and the protruding portion 5a2 will be described.

As shown in FIG. 9, downstream of the rear guider 5, a plurality of left and right wind direction changing blades 20 that are rotatably provided and change the left and right direction of the blowing air are arranged. The step portion 5 b of the rear guider 5 is arranged in a region corresponding to the blade 20 a closest to the side wall among the plurality of left and right wind direction changing blades 20. Here, the “corresponding region” means a region where the blade 20 a on the most side wall side is projected onto the rear guider 5.

When the left / right wind direction changing blade 20 is rotated, the distance between the blade 20a closest to the side wall and the side wall 12 is changed by the rotation of the blade 20a, and the air flow is unstable and noise is likely to be generated. . This is because the side wall 12 is fixedly arranged. On the other hand, the distance between adjacent blades other than the blades 20a is constant even when the blades rotate, and the air flow is stable. This is because the plurality of blades of the left / right wind direction changing blade 20 rotate so as to be parallel to each other.

Therefore, with the above-described configuration, the region where the projecting portion 5a2 is formed to narrow the ventilation path is limited to the area where noise is likely to occur, and the ventilation path is secured to the maximum in the area where the wind speed is fast and the flow is stable. can do.

Note that the stepped portion 5b does not necessarily have to be arranged only in the region corresponding to the blade 22a on the most side wall side, and is out of the predetermined range outside the corresponding region within the range where the effects of the present embodiment are achieved. It may be.

(Embodiment 3)
Next, the air blower of Embodiment 3 which concerns on this invention and an air conditioner using the same are demonstrated using FIG. FIG. 10 is a diagram for explaining the protruding portion 4 a 2 provided on the outlet side of the stabilizer 4. In the blower of the third embodiment and the air conditioner using the same, the same reference numerals are given to the portions showing substantially the same functions and operations as those of the first embodiment, and the description thereof is omitted. The basic configuration and operation of the blower of Embodiment 3 and the air conditioner using the same are the same as the configuration and operation of the blower of Embodiment 1 and the air conditioner using the same.

In the present embodiment, on the outlet side of the stabilizer 4, a protrusion protruding toward the rear guider 5 compared to the central portion 4 a 1 of the stabilizer 4 over a predetermined range from the end portion 4 c in the rotation axis direction of the cross flow fan 3. Part 4a2 is formed. On the outlet side of the stabilizer 4, a protruding portion 4 a 2, a step portion 4 b, and a central portion 4 a 1 are formed.

Thereby, the width of the ventilation path 13 in the region where the projecting portion 4a2 is formed is narrower than the ventilation path 13 in the central portion 4a1. As a result, the ventilation path 13 can be secured to the maximum in the central portion 4a1 where the wind speed is fast and the flow is stable. On the other hand, in the vicinity of the side wall 12 where the wind speed is slow and the flow is unstable, it is possible to improve the static pressure and stabilize the flow. Therefore, it is possible to achieve both improvement in air volume performance and reduction in noise due to separation of the flow in the vicinity of the side wall.

In addition, the protrusion part 4a2 may be provided in the side wall 12 vicinity of both right and left sides, and the protrusion part 4a2 may be provided in either right or left. Further, the protrusion 4 a 2 of the stabilizer 4 may be provided together with the protrusion 5 a 2 of the rear guider 5. The protrusion 5a2 of the rear guider 5 may not be provided, and the protrusion 4a2 may be provided only on the stabilizer 4.

When projecting portions are provided on both the stabilizer 4 and the rear guider 5, the stepped portion 4 b of the stabilizer 4 may be disposed in the same region in the axial direction as compared to the stepped portion 5 b of the rear guider 5, or on the side wall side or You may arrange | position at the center part side. Note that the stepped portion 4b of the stabilizer 4 is preferably disposed on the side wall side in the axial direction as compared with the stepped portion 5b of the rear guider 5. By making the axial length of the protruding portion 5a2 of the rear guider 5 larger than the axial length of the protruding portion 4a2 of the stabilizer 4, it is possible to realize a reduction in noise due to separation of the flow near the side wall. This is because the main flow of wind blown out from the cross flow fan 3 (most wind) flows along the rear guider 5.

The present invention, in a blower using a cross-flow fan, improves the air flow performance near the central portion and the side wall, which is the mainstream, and at the same time stabilizes the flow by suppressing separation near the side wall, thereby reducing noise. Can do. Therefore, the present invention is useful for an air conditioner indoor unit and a general blower using a cross flow fan.

DESCRIPTION OF SYMBOLS 1 Main body 1a Suction port 1b Outlet 2 Heat exchanger 3 Cross flow fan 4 Stabilizer 4a1 Center part 4a2 Projection part 4b Step part 4c End part 5 Rear guider 5a1 Center part 5a2 Projection part 5b Step part 5c End part 6 Upper and lower blades 13 Ventilation path 20 Left and right wind direction change blade

Claims

Cross flow fan,
A stabilizer disposed to face the cross flow fan;
A rear guider that forms a ventilation path with the stabilizer;
A side wall disposed in a direction perpendicular to the rotation axis of the cross flow fan,
The blower in which the protrusion part which protrudes in the said stabilizer side compared with the center part of the said rear guider is formed in the exit side of the said rear guideer over the predetermined range from the edge part to the axial direction of the said rotating shaft.
A plurality of left and right wind direction changing blades that are rotatably provided downstream of the rear guider and change the left and right direction of the blowing air;
2. The blower according to claim 1, wherein a stepped portion connecting the projecting portion and the central portion in the rear guider is disposed in a region corresponding to the blade on the side wall side of the plurality of left and right wind direction changing blades.
The blower according to claim 1, wherein when the axial length of the protruding portion is L and the radius of the crossflow fan is R, R / 5≤L≤3R is satisfied.
When the angle between the line connecting the rear guider and the closest point of the crossflow fan from the center point of the crossflow fan and the line connecting the blowout part of the rear guider from the center point of the crossflow fan is X , X satisfies 80 ° ≦ X ≦ 130 °,
The said stabilizer is the same shape in the said axial direction to the position of the angle where X satisfy | fills the said numerical formula, The said protrusion part is formed in the range beyond the angle which satisfy | fills the said numerical formula. Blower.
2. The blower according to claim 1, wherein the stepped portion connecting the protruding portion and the central portion in the rear guider gradually decreases in height from the protruding portion to the central portion.
The blower according to claim 5, wherein an inclination angle of the stepped portion is 60 degrees or less.
2. The blower according to claim 1, wherein a protruding portion that protrudes toward the rear guider side compared to a central portion of the stabilizer is formed on an outlet side of the stabilizer over a predetermined range from the end portion in the axial direction. .
An air conditioner including a heat exchanger and the blower according to any one of claims 1 to 7 in a main body having a suction port and a blowout port.