JP4505885B2 - Blower, air conditioner using the same, and air purifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
[0002]
The present invention relates to a blower provided with a fan guide, an air conditioner using the same, and an air cleaner.
[Prior art]
[0003]
Conventionally, in an outdoor unit of a separate type air conditioner, an axial flow or a mixed flow blower is often used as a blower, and in an indoor unit, a centrifugal blower is often used as a blower.
[0004]
In FIG. 5, the outdoor unit Z01 of the air conditioner provided with the axial blower 52 is shown. This outdoor unit Z01 has a heat exchanger 60 facing the suction port 58 in a rectangular casing 51 having a suction port 58 and a blower port 59, and blades 54, .. And the fan 52 that is rotationally driven by the motor 55 faces the air outlet 59, and is accommodated and disposed so as to surround the outer periphery of the impeller 53. A fan guide 56 is arranged. In the outdoor unit Z01, the fan guide 56 partitions the upstream side and the downstream side of the impeller 53 so that a pressure increasing action is obtained. From this, the suction port 58 side is moved to the outlet 59 side. An air flow is formed.
[Problems to be solved by the invention]
[0005]
By the way, in the axial flow or the mixed flow blower used as the air conditioner blower and the centrifugal blower as described above, there is a problem that the blowing efficiency is lowered or the blowing noise is increased for the following reasons. Is concerned.
[0006]
In the case of an axial flow or mixed flow blower, this will be described taking the case of an axial flow blower as an example. As shown in FIG. 5, when the air flow A is formed by the rotation of the axial flow blower 52, as shown in FIG. The blade end 54a of each blade 54, 54,... Of the blower 52, particularly in the portion corresponding to the fan guide 56, bypasses the blade end portion 54a of the blade 54 and its high pressure surface side. A blade tip flow that flows from the side toward the low pressure surface is generated, and a blade tip vortex M as shown by a spiral arrow is generated in the blade tip 54a by the blade tip flow. In this case, the blade tip vortex M is unstable and fluctuates depending on various blowing conditions such as a change in the operating state of the blower 52 or a non-axisymmetric flow of air. As a result, the air flow separation is increased on the surface of the blade 54 and the turbulence is increased. As a result, in the blower 52, the blowing noise is increased and the blowing performance is lowered (i.e. A decrease in static pressure).
[0007]
Then, this invention is made | formed for the purpose of providing the air blower which realized coexistence with the reduction of ventilation noise, and the improvement of ventilation performance, an air conditioner, and an air cleaner using the same.
[Means for Solving the Problems]
[0008]
In the present invention, the following configuration is adopted as a specific means for solving such a problem.
[0009]
In the first invention of the present application, a fan guide that changes in diameter in a curved shape toward the suction side of the impeller 11 on the outer peripheral side of the axial flow or mixed flow impeller 11 provided with the blades 12, 12,. 15 is disposed on the inner surface 15a of the fan guide 15 from the suction side opening 15b side of the fan guide 15 toward the proximity portion 15c adjacent to the blade end 12a of the blade 12. An air guide portion 9 for guiding is provided, and the air guide portion 9 is configured by a plurality of grooves 10, 10,... Extending on the inner surface 15a in the radial direction or inclined with respect to the radial direction. It is a feature.
[0010]
In the second invention of the present application, in the blower according to the first invention, the grooves 10, 10,... Constituting the air guide portion 9 are arranged at least on the suction side on the inner surface 15 a of the fan guide 15. It is characterized in that it is provided in a range from the opening 15b or the vicinity thereof to the proximity portion 15c.
[0011]
The air conditioner according to the third invention of the present application is characterized by including the blower 1 according to the first or second invention on the upstream side or the downstream side of the heat exchanger 5.
[0012]
The air cleaner according to the fourth invention of the present application is characterized by including the blower 1 according to the first or second invention on the upstream side or the downstream side of the air reforming device.
【The invention's effect】
[0013]
In the present invention, the following effects can be obtained by adopting such a configuration.
[0014]
(1) According to the blower according to the first invention of the present application, when the impeller 11 rotates, a blade tip vortex is generated at the blade tip portion 12a of the blade 12, and in this case, the blade Since the end vortex is generated at a low pressure and a pressure difference is generated between the suction side opening 15b and the vicinity of the suction side opening 15b, the air in the vicinity of the suction side opening 15b Guided by the air guide portion 9 and introduced from the suction side opening 15b side toward the proximity portion 15c, the introduction air suppresses fluctuations of the blade tip vortex as much as possible. As a result, in the blower, an increase in blowing noise and a reduction in blowing performance due to the fluctuation of the blade tip vortex are prevented as much as possible, and low noise and high efficiency operation is realized.
[0015]
Further, the air guide portion 9 is constituted by a plurality of grooves 10, 10,... Extending on the inner surface 15a in the radial direction or inclined with respect to the radial direction, thereby providing a simpler and less expensive structure. A low noise and high efficiency blower can be provided at a lower cost.
[0016]
(2) According to the blower according to the second invention of the present application, the grooves 10, 10,... Constituting the air guide portion 9 are arranged at least on the suction side opening on the inner surface 15 a of the fan guide 15. 15b or the vicinity thereof to the proximity portion 15c, the grooves 10, 10,... Are provided in the most effective part for suppressing fluctuations of the blade tip vortex by air introduction. Simplification of the structure and cost reduction are further promoted.
[0017]
(3) According to the air conditioner pertaining to the third invention of the present application, a high level of quietness is provided by providing the blower according to the first or second invention on the upstream side or downstream side of the heat exchanger 5. An air conditioner having operability and air conditioning performance can be obtained.
[0018]
(4) According to the air cleaner according to the fourth invention of the present application, by providing the blower according to the first or second invention on the upstream side or the downstream side of the air reforming device, high-level quiet operation is achieved. Thus, an air cleaner having high performance and air cleaning performance can be obtained.
DETAILED DESCRIPTION OF THE INVENTION
[0019]
Hereinafter, each invention of the present application will be specifically described based on preferred embodiments.
[0020]
1st Embodiment (refer FIG.1 and FIG.2)
FIG. 1 shows an outdoor unit Z1 of a separate type air conditioner that includes an axial blower according to the first to third aspects of the invention. This outdoor unit Z1 has a rectangular housing shape, and has a blower outlet 3 on the front surface thereof, and a suction port 4 on the back surface and one side surface thereof, and a heat exchanger in a casing 2 provided therewith. 5, the air blower 1 described below faces the air inlet 4 and the air blower 1 to be described below faces the air outlet 3, and is configured to be accommodated and disposed (illustration of other devices is omitted). ).
[0021]
The blower 1 includes an axial-flow impeller 11 in which a plurality of blades 12, 12,... Are attached to the outer periphery of a straight cylindrical boss 13 at a predetermined interval in the circumferential direction, and a motor that rotationally drives the impeller 11 6 and a fan guide 15 disposed on the outer peripheral side of the impeller 11 so as to surround it.
[0022]
The fan guide 15 is a member according to the gist of the present invention, and is arranged on the outer peripheral side of the impeller 11 so that the upstream side (suction side) space and the downstream side (blowout side) of the impeller 11. The space is partitioned, and an air flow from the upstream side to the downstream side of the impeller 11 is generated by the pressure-increasing action of the air. The fan guide 15 has an annular plate-like flange portion 15A, a straight tube portion 15B extending continuously in the direction perpendicular to the plane direction of the flange portion 15A, and a leading end of the straight tube portion 15B. And it is comprised by three parts of the curved part 15C which diameter changes gradually as it reaches the front. And this fan guide 15 is provided in the peripheral part of the said suction inlet 3 of the said casing 2 in the state which orient | assigned the said curved part 15C to the machine inner side.
[0023]
In a state where the fan guide 15 is attached to the outer peripheral side of the impeller 11, the flange portion 15A of the fan guide 15 and the blade trailing edge 12c of the impeller 11 substantially coincide with each other in the axial direction. The vane leading edge 12b of the wheel 11 extends forward from the suction side opening 15b of the fan guide 15 (that is, the end of the curved portion 15C), and the straight tube portion 15B of the fan guide 15 extends to the impeller 11. Are close to the blade tips 12a, 12a,.
[0024]
In this embodiment, the invention of the present application is applied, and among the inner surface 15a of the fan guide 15, the suction side opening 15b (that is, the outer end portion of the curved portion 15C) and the proximity portion 15c (that is, the inner surface 15a). An air guide portion 9 described below is provided in an annular region between the straight tube portion 15B and the curved portion 15C and a portion located closest to the blade blade end portion 12a of the impeller 11). Yes.
[0025]
As will be described later, the air guide portion 9 guides the air in the vicinity of the suction side opening 15b of the fan guide 15 from the proximity portion 15c side toward the proximity portion 15c along the inner surface 15a. In this embodiment, as shown in FIGS. 1 and 2, the air guide portion 9 is provided with a plurality of grooves arranged on the inner surface 15a of the fan guide 15 at a predetermined pitch. It is composed of 10, 10,.
[0026]
As shown in the left part of the center line L in FIG. 2, the groove 10 has a specific structure such as a groove extending in the radial direction of the fan guide 15 (that is, radially), or the right side of the center line L. As shown in the portion, a groove extending at a predetermined angle with respect to the radial direction of the fan guide 15 is suitable, but the groove 10 is not limited to these, and the groove 10 is straight as shown in FIG. Instead of forming in a shape, for example, it may be configured in a curved shape or a bent shape. When the groove 10 is an inclined groove, the inclination direction of the groove 10 is such that the outer end is the rotational direction of the impeller 11 with respect to the inner end (the direction of the arrow “R” in FIG. 2). The direction is set to be located on the rear side.
[0027]
As described above, by providing the air guide portion 9 composed of a large number of grooves 10, 10,... On the inner surface 15a of the fan guide 15, the operation noise of the blower 1 is reduced and the operation efficiency is improved. As a result, the outdoor unit Z1 having a high level of quiet operation and air conditioning performance can be obtained.
[0028]
That is, when the impeller 11 rotates, the air flowing from the pressure surface side of the blade 12 toward the negative pressure surface side in the portion corresponding to the fan guide 15 and the position near the fan guide 15 in the blade end portion 12a of the blade 12. As a result, a tip vortex is generated at the tip 12a. In this case, the blade tip vortex generation site (that is, the position in the vicinity of the proximity portion 15c) is a low pressure region, and a pressure difference is generated between the region near the suction side opening 15b. For this reason, the air in the vicinity of the suction side opening 15b is guided to the grooves 10, 10,... Of the air guide 9 by the pressure difference, and the proximity portion from the suction side opening 15b side. Introduced towards 15c. Since the flow of the introduced air is stable as compared with the blade tip vortex, the variation of the blade tip vortex is suppressed as much as possible by the introduced air. As a result, in the blower 1, both an increase in blowing noise and a decrease in blowing performance due to the fluctuation of the blade tip vortex are prevented as much as possible, and low noise and high efficiency operation is realized. Yes (see FIG. 7).
[0029]
Further, in the outdoor unit Z1 provided with the blower 1, a high level of quiet operation and air conditioning performance are realized based on the characteristics of the blower 1.
[0030]
Second embodiment (see FIGS. 3 and 4)
FIG. 3 shows a mixed flow blower 1 (applied to an outdoor unit of a separate air conditioner as in the case of the first embodiment) according to the inventions of claims 1 to 3. . This mixed flow blower 1 includes a mixed flow impeller 11 having a plurality of blades 12, 12,... Attached to the outer peripheral surface of a truncated cone-shaped boss 13, a motor 6 that rotationally drives the impeller 11, The fan guide 15 is arranged on the outer peripheral side of the impeller 11 so as to surround it.
[0031]
And in this air blower 1, the air guide part 9 is formed in the site | part corresponding to the curved part 15C among the inner surfaces 15a of the said fan guide 15 similarly to the case of the said 1st Embodiment. Further, as in the case of the first embodiment, the air guide portion 9 is composed of a large number of grooves 10, 10,... As shown in FIG. 4, a groove extending in the radial direction of the fan guide 15 as illustrated in the left portion of the center line L, or a groove inclined with respect to the radial direction as illustrated in the right portion.
[0032]
Also in the air blower 1 of this embodiment, the effect similar to the air blower 1 of the said 1st Embodiment is obtained, The detailed description is abbreviate | omitted.
[0033]
Others (1) In the above embodiments, the case where the blower 1 is applied as the air conditioner blower 1 has been described as an example. However, the blower of the present invention is an air reformer such as a deodorizing device or a dust removing device. The present invention can also be applied as a blower for an air cleaner equipped with a device.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a blower according to a first embodiment of the present invention and an air conditioner using the blower.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
FIG. 3 is a cross-sectional view of main parts of a blower according to a second embodiment of the present invention.
4 is a view taken along arrow IV-IV in FIG. 3;
FIG. 5 is a cross-sectional view of a conventional air conditioner.
6 is a perspective view of the blower shown in FIG.
FIG. 7 is a “noise / static pressure-air volume” performance comparison diagram of the blower according to the present invention and the conventional blower.
[Explanation of symbols]
1 is a blower, 2 is a casing, 3 is a suction port, 4 is an outlet, 5 is a heat exchanger, 6 is a motor, 9 is an air guide, 10 is a groove, 11 is an impeller, 12 is a blade, and 13 is a boss , 15 is a fan guide, 18 is an air guide, 19 is a groove, 20 is an impeller, 21 is a side plate, 22 is a shroud, 23 is a blade, 24 is a fan inlet, 25 is a fan outlet, 26 is an inlet panel, 30 is a fan guide, Z1 is an outdoor unit, and Z2 is an indoor unit.

Claims (4)

A fan guide that changes in diameter in a curved shape toward the suction side of the impeller (11) on the outer peripheral side of the axial flow or mixed flow impeller (11) provided with the blades (12), (12),. (15) is a blower comprising:
On the inner surface (15a) of the fan guide (15), a proximity portion (15c) adjacent to the blade tip (12a) of the blade (12) from the suction side opening (15b) side of the fan guide (15). An air guide (9) for guiding air toward the
The air guide (9) is constituted by a plurality of grooves (10), (10),... Extending on the inner surface (15a) in the radial direction or inclined with respect to the radial direction. Blower featuring. In claim 1 ,
The grooves (10), (10),... Constituting the air guide (9) are at least the suction side opening (15b) on the inner surface (15a) of the fan guide (15) or the vicinity thereof. It is provided in the range from the said proximity | contact part (15c), The air blower characterized by the above-mentioned. An air conditioner comprising the blower (1) according to claim 1 or 2 on the upstream side or the downstream side of the heat exchanger (5). An air cleaner comprising the blower (1) according to claim 1 or 2 on the upstream side or the downstream side of the air reforming device.

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