KR102163861B1 - Sirroco fan - Google Patents

Abstract

The present invention and a motor; An impeller having a plurality of blades disposed on the abacus connected to the motor and having a rim connected to the plurality of blades; It includes a scroll housing in which the impeller is rotatably accommodated and a bell mouse is formed to guide air sucked into the impeller, and the bell mouse is partially inserted into the inner space of the plurality of blades, and the bell mouse is inserted into the inner space of the plurality of blades. The depth of a part is 0.02 to 0.08 times the width of the impeller, and there is an advantage of being able to digest noise with flow loss.

Description

Sirroco fan

The present invention relates to a sirocco fan, and in particular, to a sirocco fan having a bell mouse.

In general, a sirocco fan is a fan having a number of short front curved blades (hereinafter referred to as all-curved blades), and is widely used in ventilation systems or air conditioners because of its low noise.

The sirocco fan may include an impeller in which a plurality of curved blades are disposed, and a scroll housing surrounding the impeller, and the scroll housing may be formed with a bell mouse to guide air intake on at least one of the left and right sides of the impeller.

KR Special 2001-0017351 A (March 5, 2001)

The conventional sirocco fan has a problem in that compaction is limited due to a large number of parts and a space in which the guide plate is installed by installing a separate guide plate for removing the recirculation area of the air flow inside the suction panel.

The present invention and a motor; An impeller having a plurality of blades disposed on a main plate connected to the motor and having a rim connected to the plurality of blades; And a scroll housing in which the impeller is rotatably accommodated and a bell mouse for guiding the air sucked into the impeller is formed, and a part of the bell mouse is inserted into the inner space of the plurality of blades, and the bell mouse is the plurality of blades The depth of the part inserted into the inner space of is 0.02 to 0.08 times the width of the impeller.

The bell mouse may have a diameter of an end positioned in the inner space less than an inner diameter of the plurality of blades.

The present invention and a motor; An impeller having a first blade portion formed on one surface of the main plate connected to the motor and a second blade portion formed on the other surface of the main plate; The impeller is rotatably accommodated and includes a scroll housing having a first bell mouse for guiding the air sucked into the first blade part, and a second bell mouse for guiding the air sucked into the second blade part, and the first A part of the bell mouse is inserted into the inner space of the first blade part and the depth inserted into the inner space of the first blade part is 0.02 to 0.08 times the width of the impeller, and the second bell mouse part is the second blade. A depth inserted into the inner space of the negative and inserted into the inner space of the second blade is 0.02 to 0.08 times the width of the impeller.

The first bell mouse may have a diameter of an end positioned in the inner space of the first blade portion smaller than an inner diameter of the first blade portion.

The second bell mouse may have a diameter of an end positioned in an inner space of the second blade portion smaller than an inner diameter of the second blade portion.

The present invention and a motor; An impeller having a first blade portion formed on one surface of the main plate connected to the motor and a second blade portion formed on the other surface of the main plate; The impeller is rotatably accommodated and includes a scroll housing having a first bell mouse for guiding the air sucked into the first blade part, and a second bell mouse for guiding the air sucked into the second blade part, and the first A part of the bell mouse is inserted into the inner space of the first blade and the depth inserted into the inner space of the first blade is 0.02 to 0.04 times the width of the impeller, and the second bell mouse is partially inserted into the second blade. The depth inserted into the inner space of the negative and inserted into the inner space of the second blade is 0.02 to 0.04 times the width of the impeller.

In the present invention, the end of the bell mouse is inserted into the inner space of the plurality of blades to prevent leakage into the space between the plurality of blades and the bell mouse during the flow flowing into the scroll housing, and the air blown from the plurality of blades can be prevented from being blown from the plurality of blades. There is an advantage of improving fan efficiency by minimizing backflow between the blades.

In addition, with a simple configuration in which the end of the bell mouse is inserted into the inner space of a plurality of blades, flow loss can be minimized, the number of parts can be minimized, and compactness is possible.

In addition, since the end of the bell mouse is inserted to a depth that minimizes noise, there is an advantage of minimizing noise as well as flow loss.

1 is a diagram showing an example in which a sirocco fan according to the present invention is applied to an air conditioner;
2 is a partially cut-away plan view showing the interior of an embodiment of a sirocco fan according to the present invention;
3 is a partially cut-away side view showing the inside of an embodiment of a sirocco fan according to the present invention;
4 is a perspective view showing an impeller of an embodiment of a sirocco fan according to the present invention,
5 is an enlarged cross-sectional view of a main part of an embodiment of a sirocco fan according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram showing an example in which an embodiment of a sirocco fan according to the present invention is applied to an air conditioner, FIG. 2 is a partially cut-away plan view showing the interior of an embodiment of a sirocco fan according to the present invention, and FIG. It is a partially cut-away side view showing the inside of one embodiment of the sirocco fan according to the present invention, Figure 4 is a perspective view showing the impeller of one embodiment of the sirocco fan according to the present invention, and Figure 5 is an enlarged cross-sectional view of the main part of the sirocco fan embodiment according to the present invention .

The air conditioner shown in FIG. 1 includes a cabinet 2; A heat exchanger 4 installed inside the cabinet 2; It may include a sirocco fan 6 that passes air through the heat exchanger 4 and sucks and blows the air that has passed through the heat exchanger 4.

The air conditioner may be one of a stand type air conditioner, a wall-mounted type air conditioner, a ceiling type air conditioner, and a duct type air conditioner. When the air conditioner is composed of a duct type air conditioner, a suction duct that guides the air in the air-conditioned room to be sucked into the heat exchanger 4 may be connected to the cabinet 2, and the cabinet 2 or the sirocco fan 6 A discharge duct that guides the air blown from the sirocco fan 6 to be discharged to the air-conditioned room may be connected.

Sirocco fan 6 includes a motor 12; It includes an impeller 14 rotated by the motor 12 and a scroll housing 16 in which the impeller 14 is rotatably accommodated.

The motor 12 is a driving source that rotates the impeller 14, and the rotation shaft 13 can be directly connected to the impeller 14, and the rotation shaft is connected to the impeller 14 through a power transmission member such as a belt or pulley. It is possible to become.

Sirocco fan 6 may be configured such that one motor 12 rotates one impeller 14. In this case, the impeller 14 is connected to a rotating shaft protruding to one of the left and right sides of the motor 12, and one impeller 14 may be surrounded by one scroll housing 16.

Sirocco fan 6 may be configured such that one motor 12 rotates a plurality of impellers 14. In this case, the motor 12 may be composed of a double-axis motor positioned between a pair of impellers 14. The rotation shaft protruding to the left of the motor 12 may be connected to the impeller located on the left side of the motor 12, and the rotation shaft protruding to the right of the motor 12 may be connected to the impeller located on the right side of the motor 12. In addition, each of the impellers 14 may be surrounded by each of the scroll housings 16.

The impeller 14 includes a main plate 22, a plurality of blades 24, and a rim 30. In the impeller 14, a plurality of blades 24 are disposed on a main plate 22 connected to the motor 12, and a rim 30 is connected to the plurality of blades 24.

The main plate 22 may have a rotation shaft coupling portion to which the rotation shaft 13 of the motor 12 is coupled.

The plurality of blades 24 may be formed on at least one of one surface and the other surface of the main plate 22. A plurality of blades 24 may be arranged on the abacus 22 at regular intervals. Air may be blown in the radial direction of the impeller 14 through the gap between the plurality of blades 24.

The sirocco fan may have a plurality of blades 24 disposed on only one side of the abacus 22, and in this case, air may be sucked in only one direction of the impeller 14, and the sirocco fan becomes a single suction sirocco fan. I can.

The sirocco fan may have a plurality of blades 24 disposed on one side and the other side of the abacus 22 with the abacus 22 interposed therebetween. In this case, air may be sucked in two directions of the impeller 14, and the sirocco fan may be a double suction sirocco fan.

Each of the plurality of blades 24 may be composed of an all-curved blade that is bent forward in the rotation direction. Each of the plurality of blades 24 may have different distances between one end and the rotational center axis X of the impeller 14 and a distance between the other end and the rotational center blade X of the impeller 14.

Of the plurality of blades 24, one end having a relatively short distance from the rotational center axis (X) of one end and the other end is a leading edge (25, leading edge;), and a distance from the rotational center axis (X) of one end and the other end. The other end that is relatively far away is the trailing edge (26, trailing edge).

The plurality of blades 24 may be formed to be spaced apart from each other in the circumferential direction, and may be arranged to have a hollow cylindrical shape as a whole, and an inner space S may be formed inside the plurality of blades 24.

The rim 30 may function as a support member for supporting the plurality of blades 24 by connecting the plurality of blades 24.

When the sirocco fan is a double suction sirocco fan, the impeller 14 may include a first blade portion 23A formed on one surface of the abacus 22 and a second blade portion 23B formed on the other surface of the abacus 22. I can.

The impeller 14 includes a plurality of first blades 24A formed on one surface of the main plate 22 and a first rim 30A connecting the plurality of first blades 24A to form a first blade portion 23A. can do. The first blade portion 23A is formed such that a plurality of first blades 24A are spaced apart from each other in the circumferential direction, and the plurality of first blades 24A may be disposed to have a hollow cylindrical shape as a whole, and the first blade portion The inner space (S1) may be formed in the center of 23A.

The impeller 14 has a plurality of second blades 24B formed on the other surface of the main plate 22 and a second rim 30B connecting the plurality of second blades 24B to form a second blade portion 23B. can do. The second blade portion 23B is formed such that a plurality of second blades 24B are spaced apart from each other in the circumferential direction, and the plurality of second blades 24B may be disposed to have a hollow cylindrical shape as a whole, The inner space (S2) may be formed in the center of (23B).

The scroll housing 16 may be formed to surround the impeller 14.

A bell mouse I may be formed in the scroll housing 16 to guide air sucked into the impeller 14. The bell mouse (I) may be partially inserted into the inner space (S) of the plurality of blades (24).

The scroll housing 16 may be provided with an air discharge unit O through which air flowed when the impeller 14 is rotated is discharged.

The scroll housing 16 may include a pair of side plates 42 and 44 and a scroll unit 44 connecting the pair of side plates 42 and 44. The scroll housing 16 may be formed such that two side plates 42 and 44 facing each other are connected to each other with a scroll unit 44. The scroll housing 16 may further include a straight portion 48 extending from the scroll portion 44 in the air discharge direction and connecting the left and right side plates 42 and 44. The scroll housing 16 may further include a discharge guide 50 extending away from the straight portion 48 toward the air discharge direction and connecting the pair of side plates 42 and 44.

Bell mouse (I) may be formed on at least one of the pair of side plates (42, 43). The bell mouse (I) may be formed only on one of the side plates 42 and 43 in the case of a single suction sirocco fan. The bell mouse (I) may be formed on each of the side plates 42 and 43 in the case of a double suction type sirocco fan.

The air discharge part O may be formed between the pair of side plates 42 and 43 and the straight part 48 and the discharge guide 50.

The bell mouse (I) may be partially inserted into the inner space (S) of the plurality of blades (24). The bell mouse (I) may be disposed so that the end (T) located inside the scroll housing (16) is inserted into the impeller (14). The bell mouse (I) has a portion of the outer circumference inserted into the inner space (S) of the plurality of blades 24 may face the leading edge 25 of the plurality of blades 24. The bell mouse (I) is partially inserted into the inner space (S) of the plurality of blades 24, thereby minimizing leakage between the plurality of blades 24 and the bell mouse (I). The bell mouse (I) may have a diameter (D1) of the end (T) of the portion located in the inner space (S) is smaller than the inner diameter (D2) of the plurality of blades 24.

The sirocco fan may have different noise depending on the depth (L2) of the part inserted into the inner space (S) of the plurality of blades 24 of the bell mouse (I), and the sirocco fan has a plurality of blades with a depth that minimizes noise. It is preferable to be inserted into the inner space (S) of (24).

The depth L2 of a portion of the bell mouse I inserted into the inner space S of the plurality of blades 24 may be 0.02 to 0.08 times the width of the impeller L1.

In the case of a double-suction sirocco fan, the first bell mouse I1 guides the air sucked into the first blade part 23A to the scroll housing 16, and the air sucked through the second blade part 23B. A second bell mouse (I2) to guide the can be formed.

The first bell mouse I1 may be formed to protrude from one side plate 42 of the scoral housing 16 toward the main plate 22 of the impeller 14.

The first bell mouse I1 may have a diameter D1 of the end T located in the inner space S1 of the first blade part 23A less than the inner diameter D2 of the first blade part 23A. .

The first bell mouse (I1) is partially inserted into the inner space (S1) of the first blade portion (23A) and the depth (L1) inserted into the inner space (S1) of the first blade portion (23A) is the impeller width It may be 0.02 to 0.08 times of (L1).

The second bell mouse I2 may be formed to protrude from the other side plate 43 of the scoral housing 16 toward the main plate 22 of the impeller 14.

The second bell mouse (I2) may have a diameter (D1) of the end (T) located in the inner space (S2) of the second blade portion (23B) smaller than the inner diameter (D2) of the second blade portion (23B). .

The second bell mouse (I2) is partially inserted into the inner space (S2) of the second blade portion (23B) and the depth (L1) inserted into the inner space (S20) of the second blade portion (23B) is the impeller width ( It may be 0.02 to 0.08 times of L1).

Table 1 is a table comparing the noise according to the depth (L2) of the end 33 of the bell mouse (I) is inserted into the inner space (S) of a plurality of blades 24, the end (T) of the bell mouse (I) This is the result of measuring noise under the same condition as all other factors other than the depth (L2) where) is inserted.

Bell mouse insertion depth ratio (L2/L1) noise 0 (Comparative Example 1) Standard noise (dB) 0.02 Standard noise (dB)-0.4 (dB) 0.04 Standard noise (dB)-0.6 (dB) 0.08 Standard noise (dB)-0.3 (dB) 0.1 (Comparative Example 2) Standard noise (dB) +0.4 (dB)

Table 1 shows the reference noise (0 dB) for Comparative Example 1 in which the end (4) of the bell mouse (I) is not inserted into the inner space (S) of the blade (24), and the end (4) of the bell mouse (I) is ) Is the result of comparing the relative noise according to the depth of insertion.

The end (T) of the bell mouse (I) is preferably inserted up to a position 0.02 to 0.08 times the width of the impeller (L1).

Referring to Table 1, it is confirmed that the end (T) of the bell mouse (I) is -0.3 (dB) to -0.6 (dB) less than the reference noise when inserted at a depth of 0.02 to 0.08 times the width of the impeller (L1). Can be.

Here, the width L1 of the impeller 14 may be a length in the direction of the rotational center axis X of the impeller 14.

The end (T) of the bell mouse (I) is inserted into the inner space (S) of the plurality of blades 24 at a depth of 0.04 times the width (L1) of the impeller (14), and the noise may be the smallest. It is most preferable that the end (T) of (I) is inserted to a depth of 0.04 times the width (L1) of the impeller (14).

Meanwhile. Referring to Table 1, in the case of Comparative Example 2 in which the end (T) of the bell mouse (I) is inserted at a depth of 0.1 times the width (L1) of the impeller 14, it is confirmed that it is rather 0.4 (dB) larger than the reference noise. May be, and the end (T) of the bell mouse (I) is preferably inserted to a depth of 0.02 to 0.08 times the impeller width (L1).

12: motor 14: impeller
16: scroll housing 22: abacus
24: blade 25: leading edge
26: posterior 30: rim
42,44: side plate 46: scroll unit
I: Bellmouth O: Air outlet

Claims (5)

With a motor;
An impeller having a plurality of blades disposed on a main plate connected to the motor and having a rim connected to the plurality of blades;
The impeller is rotatably accommodated and includes a scroll housing formed with a bell mouse for guiding the air sucked into the impeller,
Part of the bell mouse is inserted into the inner space of the rim,
The bell mouse is a sirocco fan having a depth of a portion inserted into the inner space of the rim of 0.02 to 0.08 times the width of the impeller. The method of claim 1,
The bell mouse has a sirocco fan having a diameter of an end positioned in the inner space smaller than an inner diameter of the plurality of blades. With a motor;
An impeller having a first blade portion formed on one surface of the abacus connected to the motor and connected to a first rim, and a second blade portion formed on the other surface of the abacus and connected to a second rim;
The impeller is rotatably accommodated and includes a scroll housing having a first bell mouse for guiding air sucked into the first blade part, and a second bell mouse for guiding air sucked into the second blade part,
Part of the first bell mouse is inserted into the inner space of the first rim and a depth inserted into the inner space of the first rim is 0.02 to 0.08 times the width of the impeller,
The second bell mouse is partially inserted into the inner space of the second rim and the depth inserted into the inner space of the second rim is 0.02 to 0.08 times the width of the impeller. The method of claim 3,
The first bell mouse has a diameter of an end positioned in the inner space of the first rim less than the inner diameter of the first blade portion,
The second bell mouse has a sirocco fan having a diameter of an end positioned in the inner space of the second rim smaller than the inner diameter of the second blade portion. With a motor;
An impeller having a first blade portion formed on one surface of the abacus connected to the motor and connected to a first rim, and a second blade portion formed on the other surface of the abacus and connected to a second rim;
The impeller is rotatably accommodated and includes a scroll housing having a first bell mouse for guiding air sucked into the first blade part, and a second bell mouse for guiding air sucked into the second blade part,
A part of the first bell mouse is inserted into the inner space of the first rim and a depth inserted into the inner space of the first rim is 0.02 to 0.04 times the width of the impeller,
The second bell mouse is partially inserted into the inner space of the second rim and the depth inserted into the inner space of the second rim is 0.02 to 0.04 times the width of the impeller.

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