KR100554469B1 - Sirocco Fan and Sirocco Fan Ass'y - Google Patents

Abstract

The present invention is a sirocco fan having a main plate and a wing formed on one side of the main plate is formed in the center shaft coupling portion for coupling with the motor shaft,

The wing portion and the first wing having a plurality of first wings formed at equal intervals along the circumferential direction on one side of the main plate; The second wing portion is formed coaxially in front of the first wing portion, and has a plurality of second wings that are alternately arranged with the first wings along the circumferential direction, and the second wing portion having a larger width than the width of the first wing portion. It is characterized by having.

Thereby, a sirocco fan is provided which can reduce noise, increase efficiency, and blow air volume.

Sirocco fan, 1st wing, 2nd wing, abacus

Description

Sirocco Fan and Sirocco Fan Assembly {Sirocco Fan and Sirocco Fan Ass'y}

1 is a perspective view of a conventional sirocco fan,

2 is a cross-sectional front view of the sirocco fan of FIG.

3 is a perspective view of the sirocco fan according to the present invention;

4 is a front cross-sectional view of the sirocco fan of FIG. 3;

5 is a cross-sectional view of the sirocco fan assembly with the sirocco fan of FIGS.

* Explanation of symbols for the main parts of the drawings

 1: Sirocco fan 21: 1st wing part

22: second wing portion 50: sirocco fan assembly

51: scroll 53: motor

 a: angle of incidence b: exit angle

 c: tongue angle d: tongue radius

The present invention relates to a sirocco fan, and more particularly, to a sirocco fan having an improved structure for reducing noise and improving performance.                         

The sirocco fan is a fan that sucks air in the rotational axis direction and blows it in the transverse direction with respect to the rotational axis.

As shown in FIG. 1 and FIG. 2, a conventional general sirocco fan 101 includes a main plate 110, a wing 120 formed along one circumferential direction of the main plate 110, and a main plate. It has the annular side plate 130 couple | bonded with the circumference | surroundings of the wing | blade part 120 on the opposite side of 110. As shown in FIG.

In the center of the abacus 110 is formed a shaft coupling portion 111 for coupling with a rotating shaft (not shown) of the motor (not shown), the wing portion 120 is mutually along the circumferential direction of the abacus 110 It is formed of a plurality of wings 121 formed at equal intervals.

The sirocco fan 101 is coupled to a rotating shaft (not shown) of a motor (not shown) in a state rotatably installed in a scroll forming an air flow path, and rotates by a driving force of the motor (not shown) to suck in air. Ventilate.

By the way, in such a conventional sirocco fan, when the air blown in the full width of each blade in the width direction of each blade contacts the cutoff of the scroll while the width direction of each blade and the cutoff in the scroll are parallel to each other, the blade passing frequency (Blade Passing) Frequency: (hereinafter referred to as "BPF") there is a problem that a large noise occurs.

In addition, the conventional sirocco fan has a problem in that the blade width is formed in a single space and the blade area is large, resulting in RPM loss of the motor, thereby degrading the efficiency of the sirocco fan, such as lowering the efficiency and airflow amount.

Accordingly, it is an object of the present invention to provide a sirocco fan that can reduce noise, increase efficiency and blow rate.

According to the present invention, in the sirocco fan having a main plate and a wing formed on one side of the main plate and the main plate is formed in the center shaft coupling portion for coupling with the motor rotation shaft, the wing portion of the abacus A first wing portion having a plurality of first wings formed on the side at equal intervals along the circumferential direction; The second wing portion is formed coaxially in front of the first wing portion, and has a plurality of second wings that are alternately arranged with the first wings along the circumferential direction, and the second wing portion having a larger width than the width of the first wing portion. It is achieved by a sirocco fan characterized by having.

Here, the width of the first wing portion and the width of the second wing portion is preferably formed in a 2: 3 ratio.

At this time, the incidence angle of the first wing and the second wing is 85 ° to 95 °, the exit angle is effective 30 ° to 35 °, the first wing and the second wing is formed to have a curved cross section in the longitudinal direction. It is desirable to be.

On the other hand, the object is, according to another field of the present invention, a sirocco fan having a main plate and the wing portion formed on one side of the main plate is formed in the center shaft coupling portion for coupling with the motor shaft; In a sirocco fan assembly having a scroll to form a receiving space of the sirocco fan and a flow path of air, the wing portion of the sirocco fan has a plurality of first wings formed at equal intervals along the circumferential direction on one side of the main plate It has a first wing having a plurality, and a plurality of second blades are formed coaxially in front of the first wing, and alternately arranged with the first wings in the circumferential direction, the width larger than the width of the first wing It is also achieved by the sirocco fan assembly, characterized in that it has a second wing portion having.

Here, the wing portion has an outer diameter of 77mm to 79mm, an inner diameter of 61mm to 63mm, and a width of 25 to 27mm, the width of the first wing portion and the width of the second wing portion is formed in a 2: 3 ratio; The scroll preferably has a tongue angle of 80 ° to 85 ° and a tongue radius of 2.6mm to 2.8mm.

At this time, the incidence angle of the first and second wings is 85 ° to 95 °, the exit angle is 30 ° to 35 °, the first wing and the second wings are provided with 20 to 25, respectively, the first The wing and the second wing are effectively formed to have a curved cross section in the longitudinal direction.

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

Figure 3 is a perspective view of the sirocco fan according to the present invention, Figure 4 is a front cross-sectional view of the sirocco fan of FIG. As shown in these drawings, the sirocco fan 1 according to the present invention is the main plate 10 and the main plate 10 is formed with a shaft coupling portion 11 for coupling with the rotation shaft of the motor 53 in the center; A pair of wing portions 20 formed on one side of the support plate, an annular partition plate 30 for partitioning both wing portions 20, and an outer circumferential end portion of the second wing portion 22 to be described later. And an annular side plate 40.

The wing part 20 includes a first wing part 21 having a plurality of first wings 21a formed at equal intervals along one circumferential direction on one side of the main plate 10, and the first wing part 21 of the first wing part 21. It is formed coaxially in the front and consists of a second blade portion 22 having a plurality of second blades 22a along the circumferential direction.

At this time, the first wing portion 21 and the second wing portion 22 is formed so that both wing portions 20 are partitioned by the partition plate 30 in a state where the width has a width difference of 2: 3 ratio. . This is achieved by forming the first wing portion 21 and the second wing portion 22 having different widths in one sirocco fan 1, thereby dividing the areas of the first and second wings 21a and 22a into smaller ones. ) To minimize the RPM loss.

In addition, the first wings 21a and the second wings 22a are formed to be alternately arranged with each other, which forms the vanes of the first and second wings 21 and 22 on different lines to separate frequency bands. It is to. As a result, when the sirocco fan 1 is rotated in a state in which the scroll 51 is installed, air blown in the width direction of the first blade 21a and the second blade 22a alternates with the cutoff in the scroll 51. The BPF is separated by contacting with each other and the abnormal noise is reduced.

Also, as shown in FIGS. 4 and 5, the first wing 21a and the second wing 22a have an incident angle a of 85 ° to 95 °, and an exit angle b of 30 ° to 30 °. It is formed at 35 degrees, and the first wing 21a and the second wing 22a are formed to have a curved cross section in the longitudinal direction. This is to increase the kinetic energy of the sirocco fan (1) and at the same time to increase the area of both wings to improve the performance of the sirocco fan (1) by increasing the efficiency and blowing amount.

5 is a cross-sectional view of the sirocco fan assembly in which the sirocco fan of FIGS. 3 and 4 is installed. As shown in this figure, the sirocco fan assembly 50 includes a scroll 51 forming an appearance and a flow path of air, the aforementioned sirocco fan 1 installed in the scroll 51, and a sirocco fan 1. ) As a motor 53 for rotating. Hereinafter, as shown in FIG. 5, an example applied to a hair dryer using the sirocco fan assembly 50 according to the present invention will be described.

A motor installation space (not shown) and a sirocco fan accommodation portion 51a are formed at one side of the scroll 51 forming the exterior of the hair dryer, and the sirocco fan accommodation portion 51a opposite the motor installation space (not shown) is provided. On the outside is formed an air inlet 51b through which outside air flows. The scroll 51 is provided with an air discharge port 51c facing forward from the sirocco fan accommodation portion 51a. The scroll 51 has the dimensions of the main part such as the tongue radius d including the tongue angle c and correlated with the specifications of the sirocco fan 1 to influence the performance of the sirocco fan 1.

As an example of the scroll 51 and the sirocco fan 1, the tongue angle c of the scroll 51 is formed to be 80 ° to 85 °, and the tongue radius d is 2.6 mm to 2.8 mm. The sirocco fan 1 has an outer diameter of 77 mm to 79 mm, an inner diameter of 61 mm to 63 mm, and a width of 25 to 27 mm, and as described above, the width of the first wing part 21 and the second wing. The width of the portion 22 may be formed in a 2: 3 ratio.

The incidence angles a of the first wing 21a and the second wing 22a are 85 ° to 95 °, the exit angle b is 30 ° to 35 °, and the first wing 21a and the second wing 22a. The wings 22a are provided with 20-25 pieces, respectively. In addition, the first wing 21a and the second wing 22a may be formed to have a curved cross section in the longitudinal direction.

Here, the specifications of the scroll 51 and the sirocco fan 1 may be changed in various ways depending on the application target.

With this arrangement, a hair dryer equipped with a sirocco fan assembly 50, "A" and "B" according to the present invention, and a hair mounted with a conventional sirocco fan assembly ("C") having a single wing portion are provided. The performance of the dryer was compared as shown in the table below.

First, Table 1 compares the specifications of the conventional sirofan assembly with the specifications of the sirofan assembly according to the present invention.

Table 1

Item "C" "A" "B" Sirocco Fan Outer Diameter (mm) 78.4 78.4 78.4 Sirocco Fan Inner Diameter (mm) 64.6 62 62 Sirocco fan width (mm) 24 26.75 26.5 Number of wings 20 25 20 Wing angle (degree) 35 90 90 Wing exit angle (degrees) 61 32 32 Tongue angle (degrees) 74 82 82 Tongue radius (mm) 7.5 2.73 2.73 Wingspan rain 1: 1 2: 3 2: 3

And, Table 2 and Table 3 shows the flow rate and the sirocco fan speed (RPM) of the conventional sirocco fan assembly ("C") and the sirocco fan assembly ("A" and "B") according to the voltage (Voltage) It is a comparison.                     

TABLE 2

Voltage (v) "C" flow rate "A" flow rate "B" flow rate "A" / "C" flow ratio "B" / "C" flow ratio 2 5.35 6.23 6.76 6.23 6.76 3 10.69 12.70 13.12 12.70 13.12 6 15.46 18.32 18.60 18.32 18.60 8 19.61 23.15 23.26 23.15 23.26 10 23.19 27.27 27.19 27.27 27.19 12 26.41 30.57 30.41 30.57 30.41 14 28.86 33.09 33.03 33.09 33.03 16 35.02 35.02 18 36.57 36.57

TABLE 3

Voltage (v) R P M "C" "A" "B" 2 1497 1446 1557 3 2965 2830 2939 6 4238 3948 4119 8 5350 4910 5083 10 6270 5650 5895 12 7120 6265 6460 14 7650 6703 6955 16 7409 18 7696

As can be seen from these Tables 2 and 3, the flow rate of the siroccofan assembly ("A" and "B") according to the present invention is increased by 17% and 20%, respectively, compared to the conventional siroccofan assembly ("C"). It was.

In addition, compared to the conventional sirocco fan assembly ("C"), the sirocco fan assembly ("A" and "B") according to the present invention was confirmed that the relatively high flow rate appears at a low RPM.

On the other hand, Table 4 shows the same flow rate (21m ³ / s × 10 ³ ) noise level of the conventional sirofan assembly ("C", AC 75V) and the sirofan assembly ("B", DC 7V, 2.8A) according to the present invention ).

Table 4

1/3 octave center frequency Frequency band range Noise (dB) "C" "A" 125 112-141 52.219 52.237 160 141-178 51.438 52.732 200 178-224 47.984 45.947 250 224-282 48.459 46.937 315 282-355 47.797 47.915 400 355-447 58.956 46.207 500 447-562 55.623 44.617 630 562-708 54.441 45.983 800 708 ~ 891 61.211 56.068 1000 891-1120 61.46 52.33 1250 1120 ~ 1410 58.578 55.328 1600 1410-1780 59.063 45.955 2000 1780-2240 51.602 44.21 2500 2240 ~ 2820 49.08 37.27 3150 2820-3550 46.302 38.624 4000 3550-4470 48.645 39.946 5000 4470 ~ 5620 44.645 37.874 6300 5620 ~ 7080 38.555 32.857 8000 7080 ~ 8910 40.085 36.661 10000 8910 ~ 11200 37.662 35.812

As can be seen from this table, the noise floor uses a 1/3 octave frequency band to calculate the total noise level of the conventional sirocco fan assembly ("C") and the sirofan assembly ("B") according to the present invention. The noise of each band was recorded.

Calculation of total noise level

dB = 10log ₁₀ (10 ^{0.1 × dB1} +10 ^{0.1 × dB2} + ....)

Of the siroccofan assembly ("B") according to the present invention was 62.14 dB, and the conventional siroccofan assembly ("C") was 68.17 dB, resulting in the siroccofan assembly ("B") according to the present invention. The noise reduction was about 6 dB.

As described above, the sirocco fan according to the present invention reduces the area of the first and second wings by forming wing portions having different widths of the first and second wings, thereby minimizing the RPM loss of the motor and increasing the efficiency and airflow amount. have.

In addition, by alternately arranging the first wings and the second wings of both wings to separate the frequency bands of the first and second wings, the air blown in the width direction of the first and second wings alternates with the cutoff in the scroll. The BPF is separated in contact with each other, reducing the noise.

In the above and embodiments, but described by applying the sirocco fan and its assembly according to the invention to a hair dryer according to the technical idea of the present invention, the sirocco fan and its assembly according to the present invention is applicable to a vacuum cleaner or an air conditioner Of course.

As described above, according to the present invention, there is provided a sirocco fan that can reduce noise, increase efficiency, and blow air volume.

Claims (8)

In the sirocco fan having a main plate formed in the center and the shaft engaging portion for coupling with the motor rotation shaft, and a wing formed on one side of the main plate, The wing portion, the first wing having a plurality of first wings formed at equal intervals along the circumferential direction on one side of the main plate, and is formed coaxially in front of the first wing and the first along the circumferential direction It consists of the 2nd wing part which has a plurality of 2nd wings arrange | positioned mutually with 1 wing, The width of the first wing portion and the width of the second wing portion has a ratio of 2: 3, the incidence angle of the first wing and the second wing is 85 to 95 degrees, the exit angle is 30 to 35 degrees, The first and second wings have a curved cross section in the longitudinal direction, and the first and second wings have an outer diameter of 77 mm to 79 mm, an inner diameter of 61 mm to 63 mm, and a width of 25 mm to 27 mm. sirocco fan that features things. delete delete delete A sirocco fan having a main plate having a shaft engaging portion formed therein for coupling with a motor rotating shaft at a center thereof, and a wing formed at one side of the main plate; In a sirocco fan assembly having a scroll to form a receiving space of the sirocco fan and a flow path of air, The wing of the sirocco fan is formed coaxially in front of the first wing portion having a plurality of first wings formed at equal intervals along the circumferential direction on one side of the main plate, and the circumferential direction According to the first wings are made of a second wing having a plurality of second wings that are alternately arranged with each other, The width of the first wing portion and the width of the second wing portion has a ratio of 2: 3, the incidence angle of the first wing and the second wing is 85 to 95 degrees, the exit angle is 30 to 35 degrees, The first and second wings have a curved cross section in the longitudinal direction, and the first and second wings have an outer diameter of 77 mm to 79 mm, an inner diameter of 61 mm to 63 mm, and a width of 25 mm to 27 mm. sirocco fan assembly, characterized in that a. The method of claim 5, Wherein said scroll has a tongue angle of 80 ° to 85 ° and a tongue radius of 2.6 mm to 2.8 mm. The method of claim 5, Sirocco fan assembly, characterized in that the first wing and the second wing is provided with 20 to 25, respectively. delete

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