TW200916662A - Sirocco fan and air conditioner - Google Patents

Abstract

A sirocco fan providing a predetermined airflow rate at a reduced noise level and rotational speed, and an air conditioner having the sirocco fan. The sirocco fan satisfies the relationships of 0.18 = H/L = 0.26, R/L = 0.11, 100 DEG = ss1 = 130 DEG , and 26 DEG = ss2 = 32 DEG , where D is the diameter of a fan, H the maximum height of a deflection, L the chord length of a blade, R the radius of the front edge on the inner peripheral side of the blade, ss1 the entrance angle, and ss2 the exit angle.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sirocco fan that reduces noise and improves air supply characteristics, and an air conditioner having the sirocco fan. [Prior Art] In an air conditioner, an air cleaner, and the like, a sirocco fan is often used in the prior art. The sirocco fan has a vortex-shaped scroll and a plurality of forward fins rotatably disposed in the scroll and arranged in a cylindrical shape. An air conditioner unit F having such a sirocco fan is used, for example, a siro fan of the window air conditioner disclosed in Patent Document i. In the siro fan of the window-mounted air conditioner including the shroud and a plurality of fins disposed at a predetermined interval in the shroud, the fins have 125 to 137. The exit angle is 58 to 63. The entrance ratio of 2 〇· 75~〇. 85 is the ratio of the ratio of the inner and outer diameters of 82 to 0.88 and the maximum bending position of 〇 3 to 〇. ‘ Due to the type of the fins, even if the rotation speed is increased while the air supply amount is maintained, the noise does not become large. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. In the device, t Λ ^ 〇 both the volume of the sirocco fan in the deep sound value is changed to: ΛΙ, and the heat exchanger 2l48-9540-PF; the performance of the Chentf 5 200916662 is reduced, so the compressor is negative .0 negative and large, cop (performance coefficient) is reduced, in order to suppress the decrease of COP, the 曰 纟 w 纟 fan's blowing air volume becomes larger, the raft value becomes larger, there will be 仏, ° ° to the user uncomfortable a feeling of. In view of the above problems, the object of the present invention is to provide a Xiluo fan and an air conditioner having the same, and the Xiluo fan has a large air volume for keeping a predetermined noise. In other words, the noise value and the number of revolutions can be reduced at a given air volume. Means for solving the problem, the Syracuse JgJ household 6 ^ 8 匕 匕 涡 涡 ( ( ( 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 以及 s s s A number of fins, in which the fan is directly searched for D, the maximum curve is 声 Η 冋 Η Η 翼 翼 翼 翼 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 ^

When the angle is /3ι and the exit angle is cold 2, 0.18SH/L — 0.26 Λ R /1 ^ (1 1 1 inn./ Ι'ΙΟΟ ^^i^130°>26°^/32^32°&gt The COP of the air conditioner can be increased when the noise is variable, and the COP of the air conditioner can be increased. [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a plan view (a) and a side view (b) showing the internal structure of the inner unit of the sirocco fan-equipped hollow space device according to the first embodiment of the present invention. In Fig. 1, 10 is an indoor air conditioner. The indoor unit includes a heat exchanger 3 that heats the air of the sirocco fan 1, the motor 2 that simultaneously drives the sirocco fan, and the air blown by the sirocco fan 1. The siro fan 1 has thirst a scroll-shaped scroll 6 and a plurality of fins rotatably arranged in the scroll 2148-954〇-pF;chentf 6 200916662 6 and arranged in a cylindrical shape. In the figure, 4 is an air suction port, 5 is The blowing port of the cold air or the warm air, 7 is the rotating shaft of the fan motor 2. The indoor unit 10 includes cold refrigerant composed of a compressor, a condenser, an expansion valve, and a hair dryer. The circuit is configured to carry out an indoor cold room or a warm room. In addition, as an example of the style of the present embodiment, the sirocco fan 1 has a fan diameter of 0 160 _, a width of 19 〇 _, and a number of wings of 4 ,, heat. The exchanger 3 has 12 sections of heat transfer tubes, the column spacing of the heat transfer tubes is 12.7 La, the section spacing is 2〇4_ 'the length of the heat transfer tube axis is ·_, the ventilation resistance ΔPH.WW] (7) speed [, / s]). In addition, the indoor unit 70 1〇 is 680 mm deep, 21 〇 high, and 960 mm wide. The air in the room is sucked from the inside of the room by 1ηΑΑττ ^ to the suction port 4 of the early stage 10, and the cylindrical portion of the suction port of the thirteen tube 6 is axially rotated by the fan motor 2 in the scroll 6 The air line that gives the moving port to the -# Da force and the pressure of the sputum is blown out from the venting opening in the wind path of the opening and the inner illusion, and is placed in the ηhai wind road and blown out indoors. . 2, the cold wind or the warm wind from the blowout 5 brother 2 picture shows the Xiluo kitchen households from the survey, the figure, the third round is the implementation type: the description of the parameters of each shape, Figure 4 and Figure 3; : Figure of the fan's wing shape, Silo wind... Stacked and compared illustration. The air volume of the feather's noise value is the diameter of the fan from the west, the π ream, the chord ί ^ 'the radius R of each fan 1 , the entrance angle to the inner peripheral edge of the wing π sigh The relationship of the angle 2 is determined by the fan diameter D and the inner circumference of the wing, 弋. Moreover, the + W of the + J edge is omitted from illustration. The meaning of the number of each of the above parameters is as follows. The fan diameter D is Silo 2l48-9540-pp; the length of the external circle of the fin 8 of the fan 1 of the fan 1 is the diameter of the circumference of the circle. The chord length L is the inner circumference of the curve 9 of the 8th. The length Lu of the straight line u of the 'slot sheet one/and 9a and the outer peripheral end 9b is the maximum length of the sag 12 of the straight line u with respect to the curve 9 of the i ^ 8 A ^ most R fins 8. The angle formed by the inner circumference wire 13 of the inner circumference 2 of the curve 9 of the wing "I" is the curve. The angle formed by the outer peripheral wires 15 and 16 of the outer periphery 9b of the curve 9 of the outer edge of the curve 9 of the fin 8 is shown. Incident angle Money line is the angle formed by the curved line 14 of the inner 9 a of the curve 9 of the airfoil 8 and the direction of the wind of the # Λ t feng. The radius R of the leading edge of the blade is the radius of the arc portion formed on the leading edge of the airfoil 8; in other respects, the conventional sirocco fan has the symbol 1 〇〇 indicating that the fan (10) is compared with the sirocco fan 1 There is no disadvantage of less air volume at the time of the (four) sound. In the case where the H/L becomes smaller, the R/L becomes larger, and the angle of the horn is uncomfortable, etc., the air volume at the time of the predetermined noise becomes small. As a result, when it is installed in the indoor unit 10, the tear is blocked. q The performance from 卩", and the benefit 3 is reduced, the load of the compressor is large, and the C0P is lowered.

Therefore, when the indoor unit is equipped with a siro fan 1 〇. When the air volume at the time of the predetermined noise is small, the performance of the heat exchanger 3 is lowered. When the money is set to stand, when the air conditioning capacity is obtained, in the case of the cold room operation, the cold: the temperature rises to the above need to operate in the greenhouse. In this case, the temperature of the refrigerant rises above the required temperature, so the temperature difference between the refrigerant temperature and the indoor temperature must be large, the load of the compressor becomes large, and there is a problem that C〇P falls. S Table 1 shows the values of h/l and R/lh2 of the sirocco fan 1A of the present embodiment i and the conventional sirocco fan (10). And the value of L/D is 0.17. 2l48-9540-PF; Chentf 8 200916662 Table 1 The shape of the fins is 17Γ 17ΓΖΖΓ /52 Fan ΙΑ Fan 100 22 —0.28 --_°·16 ---J〇〇° f—_J〇〇. ~~-_43° ______ 43° 1~iU 戟 四 四 四 四 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇 风扇The conditions are all the same. At 16m3/min, 嗓咅^J彳 goes to f 47Γ2 Noise value dB revolutions rpm Fan 1A 46.5 Small. As shown in Table 2, since H/L = 〇22, the noise value and the number of revolutions Table 3 indicate the values of h/l and R/Lu2 of the sirocco fan of the present embodiment. "Western parameters

-----~~_____^±1 In Table 4, the single 兀10 is equipped with a siro fan 1 Β fan ίο. The noise value when the air volume blown is 16mVmin is the same except for the sirocco fan.噪音 noise value溆

5555? revolution rpm 2l48-9540-PF; chentf 200916662 Table 4 does not, because R / L = 0 · n, noise value, number of revolutions Table 5 shows the sirocco fan 1C of the present embodiment 1 and the conventional The value of H/L, R/T ^ 叼西洛J tt/LR/L, cold, and /5 2 of the West Fan fan 100. parameter

In Table 6, the indoor unit 1A is equipped with a sirocco fan ic and a fan 1 (10), and the noise value when the air volume blown is 16 mVmin, and the conditions other than the sirocco fan are all the same. The noise value and the 3 rpm rpm are as shown in Table 5 and Table 6. 'The sirocco fan 1D and the conventional west' of the present embodiment 1 are represented by two τηΓ, and the H/L of each of the fan 100 is The value of R/LU2. Xiluo P table 7 wing shape parameters

1〇0' 10 2148-954〇-PF;chentf 200916662 All conditions except the sirocco fan are the same Table 8 16m3/min Noise value dB revolutions rpm

The noise value and the number of revolutions are as shown in Tables 7 and 8. Since 10,000 is shown in Table 9, h/Lu, R/l== 〇, /?2=29. When the indoor single open 1n private 1 ' ^ 110 Dan 1R 3 / • Main morning 疋 10 equipped with the sirocco fan 1 blowing the wind 1 is 16m / min noise value, the number of revolutions. Table 9: Noise value at 16mVmin

Noise value dB revolutions rpm Fan 45.3 1088 Groups of 1, 2, 2 2 As shown in Table 9, 'At the most appropriate η / 1, r / l, combined, the noise value, the number of revolutions will be the smallest. Next, for h/L=0.22, r/Bu 〇u, n〇. ^ The reason why the noise value and the number of revolutions become smaller at 29°° is explained. When H/L is more than 0.26, the degree of bending of the fins is increased, and the wind is separated from the airfoil side by the wind, and a stall occurs, which causes noise and increases the number of revolutions. On the other hand, in the case where H/L & Q18 is small, the degree of curvature of the fin is small. The lowering of the lift of the fin is a cause of noise value and increase in the number of revolutions. When the R/L value is larger than 0.11, the air pressure is lowered at the leading edge of the airfoil due to an increase in static pressure and a decrease in dynamic pressure, which causes a noise value and an increase in the number of revolutions. When not, when it is larger than 130°, the inflow area of the inflow between the wings is reduced to 2148-9540-PF; and the Chent 200916662 is the cause of the noise value and the increase of the number of revolutions, the angle of incidence of the fins becomes larger; The reason for the increase in D is D. On the other hand, when ^1 is greater than 100. Small becomes the cause of the stall and becomes the noise value when /?2 is greater than 32. At this time, the degree of bending of the fins becomes small, and the lift force becomes small, which causes a noise value and an increase in the number of revolutions. On the other hand, when; 5 2 is less than 2 6 . At the time of the flow, the flow rate between the wings is increased due to the decrease in the outflow area of the inter-wing flow. Since the airflow between the wings of the West Loco is a certain degree of stall, when the speed of the sputum + 丨 is increased, the stalled airflow near the leading edge is generated near the trailing edge. Hey. $T t Dan attaches. When it is attached, the static variation of the airfoil becomes large, which causes noise increase. In the implementation type 2, H/L = 〇. 22, R/L = 0. η, /3, in the implementation type = 110 °, /§ 2 = 29 °, West, owe, 丄西洛In the fan 1, as shown in Fig. 5, the side of the negative pressure side of the leading edge is roughly cut off, and the sirocco fan, which is called a straight line, is 丨χ. The front edge of the sirocco fan 1 has a semicircular arc shape. The table shows the noise value 'number of revolutions' when the sirocco fan 1 and the roco fan IX are mounted on the inner unit 10 and the air volume is 16 m3/min. The conditions other than the sirocco fans are all the same. ^10 Noise and number of revolutions at 16mVmin---- TT Ge Ren __ 西洛可风扇 IX 西洛可风扇1 Noise value dB __45.3 45 8 revolutions rpm .. ...... _ ________ 1088 1103 ~ As shown in Table 10, when the negative pressure side of the leading edge of the shape formed by the semicircular arc of the sirocco fan is removed, the noise value and the number of revolutions can be made small. Next, the reason will be described. In Fig. 6 and Fig. 7, the relative velocity distribution inside the fan near the main board at 2148-954〇-PF; Chent 12 200916662 is shown, and in Table u, the static pressure (1) GGrpm and the air volume 8 mVmin) during the single operation are shown. The ratio of the relative speed of the inside of the fan of the sirocco fan 1 of the sirocco fan side of the negative pressure side of the cutting edge shown in Fig. 7 is compared with the ratio of the relative speed of the inside of the fan. The velocity distribution in the vicinity of the front edge and the edge of the negative pressure surface side becomes large. The speed on the negative pressure side of the leading edge where the wind easily flows is increased by the removal of the negative pressure surface side, and the number of revolutions becomes smaller as shown in Table 10, and the noise value becomes small. also,

From the static pressure shown in Table 11, the same number of revolutions of the sirocco fan IX on the negative pressure side of the leading edge can be obtained, and the highest static pressure at the same air volume can be obtained by cutting off the negative pressure side of the leading edge. The effect that the wind is easy to flow is obtained. Table 11 Static pressure at llOOrpm, air volume 8m3/min Static pressure Pa

XIRORO fan IX 6Ϊ73 [Brief Description of the Drawings] Fig. 1 is a schematic plan view (a) and a side view (b) showing the internal structure of an indoor unit of an air conditioner of a sirocco fan in the first embodiment of the present invention. ). Fig. 2 is an explanatory view showing parameters of the shape of the fin of the sirocco fan of the first embodiment. Fig. 3 is a view showing the shape of a fin of a sirocco fan of the first embodiment. Fig. 4 is a view showing a comparison of the shape of the fin of the sirocco fan of the first embodiment and the shape of the conventional fin. Fig. 5 is a view showing a wing shape 2l48-9540-PF of the sirocco fan of the implementation type 1 and 2; and a Chentf 13 200916662. Fig. 6 is a view showing the distribution of the sirocco fan in the embodiment 1. Fig. 7 is a view showing the distribution of the sirocco fan in the embodiment 1. [Main component symbol description] 1 ~ West Loco fan; 2 ~ fan motor; 3 ~ heat exchanger; 4 ~ suction port; 5 ~ blowing outlet; 6 ~ scroll; 7 ~ shaft; 8 ~ wing; Curve; 1〇~ indoor unit; 11~ straight line (chord length L); 12~ vertical line; 13~ inner circumference wiring; 14~ curve wiring; 1 5~ peripheral wiring; 16~ curve wiring. Relative catching speed Relative speed 2148-9540-PF/Chentf 14

Claims (1)

200916662 X. Patent application scope: 1. A siro fan, comprising: a scroll; a plurality of fins arranged in a cylindrical shape and rotatably disposed in the scroll, wherein the fan diameter is D, the maximum curve The height is H, the chord length is L, the radius of the inner peripheral edge of the inner wing is R, the inlet angle is cold, the exit angle is /?2, 0·18$ H/LS 0. 26, R/LS 0· η, 100° S /3 Θ 130°, 26 ° S yS 2$ 32. . 2. The sirocco fan according to claim 1, wherein the inner peripheral side leading edge of the wing has a slightly semicircular arc shape, and the negative pressure side of the fin is cut into a substantially straight shape. 3. An air conditioning unit comprising a sirocco fan as described in claim 1 or 2. 2148-9540-PF; Chentf 15