CN209129934U - Gas rectifier structure, axial flow blower, air conditioner indoor unit and air-conditioner outdoor unit - Google Patents

Abstract

The utility model discloses a kind of gas rectifier structure, axial flow blower, air conditioner indoor unit and air-conditioner outdoor unit, wherein the gas rectification mechanism includes baffle liner and rectification part, and the baffle liner is annularly arranged, and the baffle liner has air outlet；The rectification part is set to the inner wall of the baffle liner, and the rectification part includes multiple first curved strips, and the opening of first curved strip is arranged towards the air inlet, circumferentially-spaced arrangement of multiple first curved strips along the baffle liner.Technical solutions of the utility model improve air output, reduce noise.

Description

Gas rectification structure, axial flow fan, air conditioner indoor unit and air conditioner outdoor unit

technical field

The utility model relates to the technical field of air conditioners, in particular to a gas rectification structure, an axial flow fan, an air conditioner indoor unit and an air conditioner outdoor unit.

Background technique

During the operation of the wind wheel of the outdoor unit of the air conditioner, the high-speed airflow is mixed with the external static air flow along the guide ring under the action of the wind wheel, resulting in turbulent airflow. A large airflow resistance is formed between them, which leads to an increase in the turbulent noise of the diversion air duct, and also has a certain impact on the air volume.

Utility model content

The main purpose of the present utility model is to provide a gas rectifying structure, which aims to reduce the noise generated when the gas passes through the air duct in the gas rectifying structure.

In order to achieve the above-mentioned purpose, the gas rectification structure proposed by the present utility model includes:

The guide ring is annularly arranged, and the guide ring has an air outlet and an air inlet opposite to the air outlet;

The rectification part is arranged on the inner wall surface of the guide ring, the rectification part includes a plurality of first curved strips, the openings of the first curved strips are arranged towards the air inlet, and the plurality of first curved strips are arranged along the The guide rings are arranged at intervals in the circumferential direction.

In one embodiment, the rectifying portion further includes a plurality of second curved bars, the openings of the second curved bars are disposed toward the air inlet, and the plurality of the second curved bars are along the circumference of the flow guide ring. Arranged at intervals, the second curved strips are located between the first curved strips and the air outlet.

In one embodiment, the first curved strip and the second curved strip are arranged in an arc shape.

In one embodiment, the first curved strips and the second curved strips are arranged in a staggered manner in the circumferential direction of the flow guide ring.

In one embodiment, the projection of the gap between two adjacent first curved strips on the axial direction of the flow guide ring is located in the middle of the second curved strip.

In one embodiment, the first curved strip and the second curved strip are arranged in an arc shape.

In one embodiment, the first curved strip and the second curved strip are arranged in a semi-circular arc shape.

In one embodiment, the first curved strips and/or the second curved strips are arranged in a V-shape.

In one embodiment, the distance between two adjacent first curved strips is L1, and the distance between two adjacent second curved strips is L2, where L1≧L2.

In one embodiment, 2L2≤L1≤4L2.

In an embodiment, the widths of the first curved strip and the second curved strip in the axial direction of the flow guide ring are d1, and 3mm≤d1≤8mm.

In an embodiment, the heights of the first curved strip and the second curved strip in the radial direction of the flow guide ring are greater than or equal to 2 mm and less than or equal to 4 mm.

In one embodiment, the gas rectifying structure further includes an air induction ring and an air inlet opposite to the air outlet, the air induction ring is connected to the periphery of the air inlet of the air guiding ring, and the air induction ring is The direction facing away from the air outlet is flaring.

In one embodiment, the distance between the first curved strip and the peripheral edge of the air inlet is h1, and the distance between the second curved strip and the peripheral edge of the air outlet is h2, and h1<h2.

The utility model further provides an axial flow fan, comprising a gas rectification structure, the gas rectification structure comprising a flow guide ring and a flow rectification part, the flow guide ring is arranged in a ring shape, and the flow guide ring has an air outlet; The rectification part is arranged on the inner wall surface of the guide ring, the rectification part includes a plurality of first curved strips, the first curved strips are protruded towards the air outlet, and the plurality of first curved strips are arranged along the The guide rings are arranged at intervals in the circumferential direction; the guide rings are provided with axial flow fan blades.

In one embodiment, two axial flow fan blades are arranged in the guide ring, wherein one of the axial flow fan blades blows the air flow toward the air outlet in the direction of rotation, and the other axial flow fan blades The direction of rotation when blowing the air toward the air outlet is reversed.

The utility model further provides an air conditioner indoor unit, the air conditioner indoor unit includes an axial flow fan, the axial flow fan includes a gas rectification structure, and the gas rectification structure includes a guide ring and a rectification part, and the guide ring is in the shape of a rectifier. annular arrangement, the guide ring has an air outlet; the rectification part is arranged on the inner wall surface of the guide ring, and the rectification part includes a plurality of first curved strips, and the first curved strips face the outlet. The tuyere is protrudingly arranged, and a plurality of the first curved strips are arranged at intervals along the circumferential direction of the diversion ring; an axial flow fan blade is arranged in the diversion ring.

The utility model also provides an air conditioner outdoor unit, the air conditioner outdoor unit includes a casing and a wind wheel mounted on the casing, the casing has a front panel, and the front panel is provided with a channel corresponding to the position of the wind rotor. A gas rectifying structure is installed on the inner periphery of the through hole, and the gas rectifying structure includes a guide ring and a rectifying part, the guide ring is arranged in an annular shape, and the guide ring has an air outlet; the The rectification part is arranged on the inner wall surface of the guide ring, the rectification part includes a plurality of first curved strips, the first curved strips are protruded towards the air outlet, and the plurality of first curved strips are arranged along the Circumferential spaced arrangement of the guide rings.

The technical scheme of the utility model reduces the backflow of gas along the inner wall of the guide ring by arranging the first arc-shaped protruding strip on the inner wall of the guide ring, and finally increases the air output and reduces the noise.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained based on the structures shown in these drawings without any creative effort.

1 is a schematic diagram of the assembly structure of an embodiment of the gas rectification structure of the present invention on the front panel of an outdoor unit;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the sectional view along the I-I line of Fig. 2;

FIG. 4 is an enlarged view of part A in FIG. 3 .

Description of reference numbers:

The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the difference between the various components under a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, the descriptions involving "first", "second", etc. in the present invention are only for description purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present utility model.

The utility model provides a gas rectification structure, an air conditioner outdoor unit including the gas rectification structure, an axial flow fan including the gas rectification structure, and an air conditioner indoor unit including the axial flow fan.

The above-mentioned air conditioner indoor unit may be a floor-standing air conditioner indoor unit, a ceiling unit, a wall-mounted unit, a mobile air conditioner, a duct unit, and the like.

Please refer to FIG. 1 to FIG. 3 , the present invention proposes a gas rectifying structure 10 , which includes a guide ring 11 and a rectifying portion 12 , the guide ring 11 is annularly arranged, and the guide ring 11 has an air inlet W and air outlet P. The rectifying portion 12 is disposed on the inner wall surface of the guide ring 11 , and the rectifying portion 12 includes a plurality of first curved bars 12 a , and the openings of the first curved bars 12 a are disposed toward the air inlet W, and a plurality of first curved bars 12 a are arranged. The first curved strips 12a are arranged at intervals along the circumference of the flow guide ring 11 . (The first curved strip 12a can be arranged in a C-shape, also can be arranged in a V-shape, can also be arranged in a U-shape, can also be arranged in a W-shape, can also be other regular or irregular, the opening is oriented The shape of the air inlet. Here, the first curved strip 12a is not a closed annular structure, so it forms an opening without a closed part relative to the annular structure)

Usually, the guide ring 11 is used in conjunction with the wind wheel. For ease of expression, the subsequent description of the gas rectifying structure 10 and its beneficial effects is mainly described by taking the installation on the outdoor unit of the air conditioner as an example.

The air conditioner outdoor unit includes a casing (not shown in the drawings) and a wind wheel (not shown in the drawings) installed in the casing, the casing has a front panel 20 (refer to FIG. 1 ), the front panel 20 is provided with a through hole 200 corresponding to the position of the wind wheel, and the gas rectifying structure 10 is installed on the inner periphery of the opening 200 . When the outdoor unit of the air conditioner is running, the wind wheel is running, and the outside air passes through the heat exchanger and enters into the guide ring 11 through the air inlet W of the guide ring 11 , and then is blown out from the air outlet P of the guide ring 11 .

In order to reflect the noise reduction effect of the gas rectification structure 10 of the present solution, the noise reduction structures of the rectification part 12 are provided in a variety of ways and are compared with each other.

The first comparative example: the rectification part is arranged in a bent "V", and its opening faces the air inlet W of the guide ring 11;

Second comparative example: the rectifying part is arranged in a bent "V", and its opening faces the air outlet P of the guide ring 11;

The third comparative example: the rectifying part is arranged in a curved "C" (similar to the shape of the first curved strip 12a), and its opening faces the air outlet P of the guide ring 11 .

Fourth comparative example: no rectifying portion is provided in the guide coil 11 .

Table 1

Speed (r/min) Air volume (m³/h) Noise (dBA) first comparative example 850 2130 51.4 Second Comparative Example 850 2183 51.2 The third comparative example 850 2165 51.5 Fourth comparative example 850 2170 51.2 Example 1 850 2204 50.6

It can be seen from the above table that the air output in this embodiment is significantly higher than that of the three comparative examples, and the noise is lower than that of the three comparative examples.

In addition, in the fourth comparative example, it can be seen that the air outlet volume is relatively low, which is 2170 m ³ /h. After setting the opening of the V-shaped rectifying portion toward the air outlet P of the guide ring 11, the air outlet volume is reduced, and the noise is also high. However, when the opening of the V-shaped rectifying portion is set toward the air inlet W of the deflector 11, the air outlet volume increases significantly. It can be seen that, whether the first curved strip is C-shaped or V-shaped, as long as its opening faces the air inlet W, it has the effect of increasing the air output.

It should also be noted that the height of the first curved strip in the radial direction of the guide ring should not be too large, otherwise it will cause greater resistance to the airflow. Here, the height of the first curved strip is preferably less than 10mm.

On the basis of the previous embodiment, in order to improve the noise reduction effect, in this embodiment, a second curved strip 12b is added. Specifically, the rectifying portion 12 further includes a plurality of second curved bars 12b, and the second curved bars 12b are protruded toward the air outlet P (the second curved bars are bent away from the air inlet), and a plurality of the The second curved strips 12b are arranged at intervals along the circumferential direction of the guide ring 11 , and the second curved strips 12b are located between the first curved strips 12a and the air outlet P. As shown in FIG. (The second curved strip 12b can be arranged in a C-shape, it can also be arranged in a V-shape, it can also be arranged in a U-shape, it can also be arranged in a W-shape, it can also be other regular or irregular, the opening is oriented shape of the air inlet)

Similarly, in order to test the increase of the second curved bar 12b and the influence of the position of the second curved bar 12b on the air output and noise of the entire gas rectifying mechanism, the following examples are compared:

In the second embodiment, the second curved strip 12b and the first curved strip 12a are arranged in parallel in the axial direction of the guide ring 11;

In the third embodiment, the first curved strips 12a and the second curved strips 12b are arranged in a staggered manner in the circumferential direction of the diverter ring 11 (as shown in FIG. 1 );

In the fourth embodiment, the projection of the gap between two adjacent first curved strips 12a on the axial direction of the guide ring 11 is located in the middle of the second curved strip 12b (approximately located in the second curved strip 12b). The center of the strip 12b, or its vicinity. The arc length of the second curved strip can be divided into three equal parts, and divided into a first part, a second part and a third part in sequence, and the arc length between the two first curved strips 12a can be divided into three equal parts. The projection of the gap is in the second section).

Table 2

From the comparison of the above four embodiments, it can be found that the first embodiment and the fourth embodiment are both better than other embodiments in terms of air output. In terms of noise, although the second embodiment is the lowest, its air output is also the lowest.

In the above embodiment, the first curved strip 12a and the second curved strip 12b may be circular arcs, elliptical arcs, or other regular or irregular arcs. However, considering that the guide ring 11 is generally arranged in a cylindrical shape, in order to make the flow velocity and noise of the airflow along the inner wall of the guide cylinder relatively consistent, in this embodiment, the first curved strip 12a and the second curved strip 12b are arranged in an arc shape.

In the previous embodiment, the arc shapes of the first curved strip 12a and the second curved strip 12b may be a 1/5 arc, a 1/4 arc, a 1/3 arc, or a is a 1/2 arc (semi-circle), in order to compare their respective advantages, the experimental comparison is as follows:

table 3

Speed (r/min) Air volume (m³/h) Noise (dBA) Embodiment 5 (1/5 arc) 850 2195 51.2 Embodiment 6 (1/4 arc) 850 2199 50.9 Embodiment 7 (1/3 arc) 850 2202 51 Embodiment 8 (1/2 arc) 850 2204 50.6

Relatively speaking, with the increase of the arc, the air volume increases slightly, but the increase is not obvious; but the noise is obviously reduced. In general, the first curved strip 12a and the second curved strip 12b are preferably arranged in a semi-circular arc shape.

Please refer to FIG. 3 and FIG. 4. Many factors will affect the air output and noise. For example, the distance between two adjacent first curved bars 12a is the change of L1, and the distance between adjacent two adjacent second curved bars 12b The distance between them is the change of L2; the width of the first curved strip 12a and the second curved strip 12b in the axial direction of the guide ring is d1; the first curved strip 12a and the second curved strip 12b The heights of the curved strips 12b in the radial direction of the baffle ring, etc.

Considering that the main function of the first curved strip 12a and the second curved strip 12b is to prevent backflow, and on the basis of preventing backflow, the second curved strip 12b plays a larger role. The distance L2 between two adjacent second curved strips 12b is not too small, otherwise the wind pressure between the second curved strips 12b and the air outlet P is not enough, which will easily lead to backflow. And the distance L1 between the two adjacent first curved strips 12a is not easy to be too small, otherwise the wind pressure between the first curved strips 12a and the air inlet W will be too large, which is not conducive to the air intake. In view of this, in one embodiment, L1≧L2.

In order to further verify the influence of L1 and L2 on the air volume and noise, the following experimental design is made:

Table 4

It can be seen from the above table that with the gradual increase of the ratio between L1 and L2, the air output and noise are relatively stable, and the noise is gradually decreasing. When L1=5L2, it is found that the air volume has a downward trend, and the noise value is also relatively increased. It can be seen that 2L2≤L1≤4L2 is better.

In addition, in order to test the influence of d1 on the air volume and noise, the test is as follows:

table 5

It can be seen from the above table that when d1 is between 2mm and 7mm, the air output is relatively stable, and when d1 is between 5mm and 9mm, the noise value is stable and low. To sum up, relatively speaking, when 3mm≤d1≤8mm, the air output is relatively high, and the noise value is relatively low and stable.

In order to test the influence of the heights of the first curved strip 12a and the second curved strip 12b in the radial direction of the baffle on the air output and noise, the test is as follows:

Table 6

It can be seen from Table 6 that when the heights of the first curved strips 12a and the second curved strips 12b in the radial direction of the baffle 11 are greater than or equal to 2 mm and less than or equal to 4 mm, the noise and air volume are optimal.

Please refer to FIG. 1 and FIG. 3 , in a preferred embodiment, in order to facilitate the air intake and also to reduce the noise generated during the air intake, the gas rectifying structure 10 further includes an air induction ring 13 , and the air induction ring 13 The ring 13 is connected to the peripheral edge of the air inlet W of the guide ring 11 , and the air induction ring 13 is flaring in the direction facing away from the air outlet P.

Continuing to refer to FIGS. 3 and 4 , on the basis of the previous embodiment, it is considered that the wind wheel of the outdoor unit of the air conditioner will protrude into the guide ring 11 from the air inlet W, and be approximately located in the front 2/3 of the guide ring 11 In the position of , in order to make the fan blades correspond to the positions of the air guides, in this embodiment, the distance between the first curved strip 12a and the periphery of the air inlet W is h1, and the second curved strip 12b The distance from the periphery of the air outlet P is h2, and h1<h2.

Since the airflow will cause the end of the fan blade to vibrate (especially the airflow backflow), resulting in noise, the overall position of the rectifier 12 is adjusted to the position close to the air inlet W, and the airflow around the end of the fan rotor will reduce the vibration of the fan rotor. generated noise.

The present invention also provides an axial flow fan, which comprises the above-mentioned gas rectification structure 10, and an axial flow fan blade is arranged in the guide ring 11. Here, the number of the axial flow fan blades may be one, two, or three or even more.

Considering the cost, noise and air output, it is a preferred embodiment that the axial fan is provided with two axial fan blades.

For an axial fan with two axial fans, a counter-cyclone is a preferred embodiment, that is, the direction of rotation when one of the axial fans blows the air toward the air outlet P is different from that of the other. When the axial flow fan blows the airflow to the air outlet P, the rotation direction is opposite.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structural transformations made by using the contents of the description and drawings of the present invention under the inventive concept of the present invention, or Direct/indirect applications in other related technical fields are included in the scope of patent protection of the present invention.

Claims (18)

1. a gas rectification structure, is characterized in that, comprises: The guide ring is annularly arranged, and the guide ring has an air outlet and an air inlet opposite to the air outlet; The rectification part is arranged on the inner wall surface of the guide ring, the rectification part includes a plurality of first curved strips, the openings of the first curved strips are arranged towards the air inlet, and the plurality of first curved strips are arranged along the The guide rings are arranged at intervals in the circumferential direction. 2 . The gas rectifying structure according to claim 1 , wherein the rectifying part further comprises a plurality of second curved bars, the openings of the second curved bars are arranged toward the air inlet, and the plurality of the first curved bars are arranged. 3 . Two curved strips are arranged at intervals along the circumference of the air guide ring, and the second curved strip is located between the first curved strip and the air outlet. 3 . The gas rectifying structure according to claim 2 , wherein the first curved strip and the second curved strip are arranged in an arc shape. 4 . 4 . The gas rectifying structure according to claim 3 , wherein the first curved strip and the second curved strip are arranged in a staggered manner in the circumferential direction of the flow guide ring. 5 . 5 . The gas rectifying structure according to claim 4 , wherein the projection of the gap between two adjacent first curved strips on the axial direction of the flow guide ring is located on the second curved strip. 6 . the middle of. 6. The gas rectifying structure according to claim 2, 3, 4 or 5, wherein the first curved strip and the second curved strip are arranged in a circular arc shape. 7 . The gas rectifying structure according to claim 6 , wherein the first curved strip and the second curved strip are arranged in a semi-circular arc shape. 8 . 8 . The gas rectifying structure according to claim 2 , wherein the first curved strips and/or the second curved strips are arranged in a V shape. 9 . 9. The gas rectifying structure according to claim 2, 3, 4 or 5, wherein the distance between two adjacent first curved strips is L1, and the distance between two adjacent second curved strips is L1. The spacing is L2, L1≥L2. 10. The gas rectifying structure according to claim 9, wherein 2L2≤L1≤4L2. 11. The gas rectifying structure according to claim 2, 3, 4 or 5, wherein the width of the first curved strip and the second curved strip in the axial direction of the flow guide ring is d1 , 3mm≤d1≤8mm. 12. The gas rectifying structure according to claim 2, 3, 4 or 5, wherein the height of the first curved strip and the second curved strip in the radial direction of the guide ring is greater than or equal to 2 mm and less than or equal to 4mm. 13. The gas rectification structure according to any one of claims 2 to 5, wherein the gas rectification structure further comprises an air induction ring and an air inlet opposite to the air outlet, and the air induction ring is connected to the air inlet. The air inlets of the air guide ring are connected to the periphery of the air inlets, and the air induction rings are flaring in the direction facing away from the air outlet. 14. The gas rectifying structure according to claim 13, wherein the distance between the first curved strip and the periphery of the air inlet is h1, and the distance between the second curved strip and the periphery of the air outlet is h1. The spacing is h2, h1<h2. 15. An axial-flow fan, comprising a motor and an axial-flow fan blade, characterized in that, further comprising the gas rectification structure according to any one of claims 1 to 14, wherein the motor is installed on the gas rectification structure, so The axial flow fan blade is arranged in the guide ring, and the axial flow fan blade is installed on the motor. 16 . The axial flow fan according to claim 15 , wherein two axial flow fan blades are arranged in the guide ring, and one of the axial flow fan blades rotates when blowing the airflow to the air outlet. 17 . The direction is opposite to the rotation direction of the other axial flow fan when blowing the air flow to the air outlet. 17. An air conditioner indoor unit, comprising the axial flow fan according to claim 15 or 16. 18. An air conditioner outdoor unit, characterized in that the air conditioner outdoor unit comprises a casing and a fan wheel mounted on the casing, the casing has a front panel, and the front panel is provided with a position corresponding to the position of the fan rotor. A through hole, the gas rectifying structure according to any one of claims 1 to 14 is installed on the inner periphery of the through hole.