TW201002944A - Sirocco fan and air conditioner using the same - Google Patents

Abstract

A sirocco fan and an air conditioner using the sirocco fan. The sirocco fan produces reduced noise when it supplies a predetermined amount of blowing air. The sirocco fan (100) has suction openings (2a) formed at opposite sides of a scroll casing (2) so as to be located on a line extended from the center axis of a fan (1). The sirocco fan satisfies, in the range of 0.1 = k4? = 0.4, the relationships of f(k4?) = 0.34947(k4?)2 - 1.0554(k4?) + 1.8 and 0.75f(k4?) = L/H = f(k4?), where P is the air flow resistance in an air flow path (2c) in Pa, Q the amount of air taken in from the suction openings (2a) in m3/min, L the width of the fan (1) in the direction of its rotation axis in mm, and k a constant, with the height H of the scroll casing (2) set to 246k (mm) and P/Q2 a loss factor ?[Pa/(m3/min)2].

Description

201002944 IX. Description of the invention: [Technical field of the invention] The air conditioner fan and the gas invention are related to the sirocco fan and the use of the fan, in particular, the use of the fan for making a sound for reducing the sound generated Air conditioning unit. [Prior Art] Shape, since the past, there is a multi-blade centrifugal fan that has a cylinder/' and can blow a t-wide band to the air-conditioned object area, and is often used in an indoor unit that constitutes an empty (four), or Dehumidification ::::Net machine, etc. Such a sirocco fan generally has a plurality of elongated cores: a fan which is arranged on the circumference and is formed in a cylindrical shape as a whole, and is housed in a volute casing which is blown out from the mouth. And the air that the Sloan fan takes in from the inhalation, the work m (four), and the air-conditioning object from the air outlet side. As a kind of siro fan, it is proposed to "- a multi-blade fan, including: : here: ... a plurality of multi-blade centrifugation connected along the same shaft: a fan unit, and a plurality of multiples for housing the connection An outer casing of a centrifugal fan-shaped wind feather, the casing is formed to continuously blow air discharged from the plurality of fan units to the outside, and the flow path is continuously connected to the plurality of multi-blade centrifugal fan units. The flow path" (for example, refer to Patent Document 1). Patent Document 1: Japanese Laid-Open Patent Publication No. Hei No. Hei No. 1 324 984 (page, 7 to 8) Ang 2148-9915-PF 5 201002944 ·- [Summary of the Invention] In the blade of the blade, The loss coefficient of the operating point is located closer to the open side than the unstable area, and has a problem that the width of the moving point is narrow and the noise generated by the t in the fan is large at a predetermined air volume. When the sirocco fan supplies a certain amount of air to the air conditioner, the sound generated by the fan becomes large, and becomes noise, and is transmitted to the object area, so that the user feels that the ##° is uncomfortable. In addition, if the predetermined noise is reduced, the blower's airflow $ from the sirocco fan becomes small, and if the blown air volume is increased, the α 喿 sound value becomes large, and the right wei a 〃 有 〃 〃 〃 And the balance of the sound is produced. Further, when the width of the fan is small, the noise is small, and if the coefficient is small, the diameter of the fan must be excessively increased. In addition, in the case where such a Xiluo fan is used for an air conditioner, if the fan width is narrow, the speed distribution in the width direction of the heat exchanger in the case where the switching is performed, and the state of the shift is located on the downstream side of the fan. It becomes uneven, and the heat conductivity month b of the heat exchanger is lowered, and the compressor 0 has a problem of increasing power consumption. Moreover, there is also a problem that the relationship between the loss coefficient and the fan width is not clear. The present invention has been made in order to solve the above problems, and the object of the present invention is to provide a sirocco fan and an air conditioner using the same, and the fan is configured to reduce the occurrence of a blown air supply when a predetermined amount is blown. the sound of. [Means for Solving the Problem] The sirloin fish of the present invention, "including a volute casing, has a suction port for taking in air, a blow port for blowing back the work, and The suction port to the outlet of the wind. The fan is contained in the volute casing.

2148-9915-PF 201002944 is driven by the rotation and is taken from the inlet and the inlet of the air, and the air is blown from the mouthpiece, and the bell is attached to the dome. The suction port is characterized by the fact that the inlet is located on the extension line of the center of rotation of the fan and is formed on both sides of the (four) shaped shell, and the ventilation resistance in the air passage is P [Pa], The amount of air taken in from the suction port is: the width AL of the axis of the fan in the direction of the axis of rotation [_b is a constant 'the complexity of the dome-shaped shell is H=246k[_], and P/Q2 is the loss coefficient. The condition of p [pa/(m3/min) 2] is in the range of 0. 1 g k4 f 〇. 4, and is made f (k4 F) = 〇.34947(k^)2- 1.0554(k^) + 1.8> 0.75f(k^)^ L/HS f(k4|:). The sirocco fan of the present invention includes: a volute casing having a suction port for taking in air, a blow port for blowing air, and a wind path from the suction port to the blow port; the fan is fastened Storing in the volute casing, taking in air from the suction port by blowing and blowing air from the air outlet; and the bell mouth is attached to the suction port of the volute casing; In the extension line of the suction port located at the center of rotation of the fan, the one side of the volute casing is sub-formed, and the ventilation resistance in the air path is P [Pa], and the air taken in from the suction port The amount is Q[mViDin], the width of the fan in the direction of the axis of rotation is L[mm], k is constant, the height of the volute is H = 246k [mm], and P/Q2 is the loss coefficient g [pa/( In the case of m3/min) 2], in the range of 0.1 SS 0_4, g(k4 ζ )-1.39788( k4^ )2-2. 1108( k4f ) + 1.3 , l.SgQ^^ ^ < L/HS2g (k4f). Further, the air conditioner of the present invention is characterized in that the above-mentioned West 2148-9915-PF 7 201002944 Rockwell fan is used. [Effect of the Invention] According to the sirocco fan of the present invention, the fan is widely produced, and the 疋n reed is seen according to the mathematical formula of the 疋n, so that the operating point of the fan is located at the predetermined position... the air can be blown out of the wind* In addition, since the balance is provided between the supply and the sound, it is possible to effectively reduce the sound generated when the air volume is blown. In the first embodiment, the first embodiment is a perspective view of the sirocco fan as a whole in the first aspect of the present invention. Fig. 2 shows the H of the fan 1. Fig. 3 shows the cross section of the sirocco fan _. The overall structure of the Xiluo fan 1〇0 will be described based on Fig. 1 to Fig. 3 . This Silo fan 100 Sun Brake: Air: or indoor unit of an air conditioner such as a dehumidifier, or ^^. In addition, the relationship between the dimensions of the constituent members of the following two drawings, including the first drawing, is different from the actual one. : In the figure: the sirocco fan m is composed of the following members, ^ is a plurality of elongated blade plates (blades) arranged on the circumference, = the whole becomes a cylindrical shape; the 埚-shaped case 2' is a receiving fan Bu is internally formed into a wind path, and the bell mouth 3 is an extension line of the center of rotation of the fan 1 (hereinafter simply referred to as a rotating shaft), and is attached to the dome-shaped housing 2, and has a t-moving center' by rotating Inhale the air and blow the air out. 2148-9915-PF 8 201002944 The clamshell 2 is composed of the following members, the suction port 2a is an opening formed on the rotating shaft, and the air outlet 2b blows air sucked from the suction port 2a to the target region; The path 2c' is opened toward the rotational direction of the fan 1 and has a volute shape (curved shape), and the suction port 2a and the air outlet 2b are communicated. The bell mouth 3 is formed by machining an opening, and is attached to the suction port 2a of the scroll case 2, and is configured to increase the speed of the air taken in from the suction port 2a and supply it to the fan 1. The fan 1 can constitute a fan diameter d by, for example, 192 ran, for example, 15 〇 to 4 mm to form a width dimension L, for example, a number of blades to form a blade number. The volute casing 2 can form a volute-like height H of 246 mm. Further, the shape of the nozzle 3 is determined, for example, depending on the length of the fan diameter ,, and Fig. 4 shows the sirocco 戸

Winning from the fan 100's Q characteristics and KS-Q characteristics of the graphics. The P-Q characteristics and Ks-Q characteristics of the sirocco fan 100 are illustrated in accordance with Fig. 4 y. Here, y [m3/m. 1 v - no static pressure [Pa], ΰ indicates air volume

Lm /min] ' Ks indicates the noise ratio [Xian ^ Ks_SPI 1 n , 曰 Ks is based on the number ^ ^ Ks-SPL - 10 . i0gl 〇 (p. q2.) The noise value is used in the slave installation. In addition, the center of the SPL table, along the axis of rotation; ° 〃 2 the mouth of the suction port 2a of the bell 3 fan 10. The noise generated by the 'spoon position, measured from the Silo wind, and the blank circle mark κ: The black circle symbol indicates the pQ special action point. Temple characteristics. In addition, '(1) to (3) indicate that the p-Q characteristic is expressed in the static pressure of the fan 丨 resistance (the left vertical axis is fixed, The relationship between ventilation hurricane 篁Q (horizontal axis).

2148-9915-PF 201002944 The black round mark of the figure shows that the smaller the static pressure is, the more wind and the wind become easier to flow, and the more the static dust is, the more difficult it is to flow in the wind 2e. That is, at the operating point (7), the air volume is easily obtained, and at the operating point (1), the air volume is expected. Therefore, the smaller the static pressure, the larger the air volume, and the larger the static pressure, the smaller the air volume. Further, in the following description, the high static pressure and low air volume side will be referred to as the closing side (the upper left side of the figure), and the low static pressure and high air volume side will be referred to as the open side (the lower right side of the figure). However, as shown in Fig. 4, there is a localized area where the static pressure is small even if the amount of wind is small. This area is referred to as a surging area (the dotted line enclosed area shown in Fig. 4). In this unstable area, the flow of air in the wind path 2c tends to become unstable. That is, the 'unstable area is a region where the possibility of abnormal noise is high due to the instability of air flow. Further, the specific noise Ks (right vertical axis) is not as long as the blank circular mark of Fig. 4, and becomes larger when the air volume Q is increased. This specific noise Ks takes into account the hysteresis value of the static pressure p and the air volume Q. Figure 5 shows the L()/H of the sirocco fan. A graph of the relationship with the loss factor ^. According to Fig. 5, the relationship between the sirocco fan 1 and the loss factor is explained. In the fifth figure, the volute casing is highly sturdy. Fix it to 246mm ' to make the fan width size l. Change between 150 and 50 Omm, using the loss factor I:. = p. / Q. 2 [ p a / ( m 3 / m i n ) 2 ], which becomes the smallest width dimension L than the π 喿 K s. , represents the relationship between Lo/Ho and the loss coefficient f d . In Fig. 5, the vertical axis represents "/Η., the horizontal axis represents the loss coefficient I: 0. The loss coefficient f D = pe / Qa2, and in the P-Q characteristic shown in Fig. 4, the loss coefficient f is shown. The larger the temperature is, the closer it is to the closing side, and the smaller the loss coefficient f is, the closer it is to the open side. Further, the loss coefficient is a value obtained from the position of the operating point (p, Q) 2148-9915-PF 10 201002944 described later. , L()/H, which means that the height h of the volute casing is fixed, and the ratio of the case of the visibility dimension L is changed. From the fifth figure, according to the loss coefficient f, it is known that the specific noise Ks becomes the smallest. The width dimension L. changes, that is, the more the loss coefficient g. The smaller the opening side, the longer the noise size Ks becomes the smallest dimension L. Therefore, from Fig. 5, the loss coefficient 芕〇δ In the case of 〇·1 $f each of the range of 0.4, let f (f) = 〇. 34947 f —l'0554 f+l,8,Lci/Hd= f ( p ), the specific noise Ks becomes The most J is '$(^) = 0.34947^2 - 1.0554^+1.8 is the equation calculated from the graph shown in Fig. 5. Next, the ratio of the noise Ks due to the loss coefficient g^ and the width dimension L〇 is explained. The reason for the change. Fig. 6 shows that the width dimension L is not set to 230 or 30 匪, and the sirlo wind shoulder of the case of the point A is "〇. The p-Q characteristic and the pattern of Ks_q^ & and the 'black circle mark' indicate the width dimension L. The P-q characteristic is the case of 230 mm, and the blank circle mark indicates the width dimension L. The P-Q characteristic for the case of V:-:, the black triangle mark indicates the width dimension L. The Ks-Q characteristic is the case of __, and the blank triangle mark indicates the Ks-Q characteristic of the case where the width dimension L° is 300_. In addition, the operating points described here are based on the design of the unit's air volume, and the design of static pressure (heat exchanger k wind resistance, or single% of the wind path, ventilation of the duct air duct, tears, etc.) Resistance). ’. , word 1 degree size L. When it is set to 230mm or 300mm, when the characteristic of the I-operation point is compared, the _ of the width dimension is longer, and the non-female area is moved to the lower right of the graph of the p-Q characteristic (open

2l48-99i5-pF 201002944 and close to action point A. From the p-q simplifications shown in Fig. 6 to the factory, "/f, ~y, and Ks - Q, the action point that becomes the smallest than the smack Ks is located near the unstable area. However, when the operating point is located in an unstable area or in the vicinity of an unstable area, the flow becomes unstable, and the fluctuation becomes large. SI& If the hoisting, or the time of the wind (4): In the case of a steady flow of stability, the action point needs to be located at 屮X6^ and closer to the open side than the non-female area. That is, for a certain action ΙΉ P π π <",), when the volume of the fan is increased, in the ρ__ Q characteristic map, the unstable region of the unstable zone leaves the open side (that is, the operating point is more likely to occur. Q knows the lower right side of the 14th map. The farther it is, the more different it is. The reason for this is that the area shown in the outer casing is 2M), or the distance between the fan and the fan in the third figure is short. In the present invention, the pre- & _ motion is made larger, and the unstable area is moved. By making the capacity of the fan close to 'the noise generated is small. The point of the operation and the unstable area are here, in order to make the volume of the fan large, or to widen the width of the fan. However, the second is to make the fan diameter change height too high. In the present invention, it is obtained that: - the fan is straightened and the height is increased, and the height of the single unit becomes too high 'to the width of the fan: the second is not used to make the operating point and the unstable area ^, and the setting limit is small. And it can reduce the arpeggio. "The figure 7 of the best unit represents the relationship between the position of each blade of the fan 1 and the position of the blade. According to this: the air volume between the sheets and the fan of the fan 100 丨, θ, 3 brothers The relationship between the position of the sill plate and the position of the blade. The vertical axis indicates the per-leaf

214 8-9915-PF 201002944 Inter-blade circumference of the sheet. At 7th (m/min), the horizontal axis indicates the position of the blade. Further, _ "'", the circular mark indicates the relationship between the air volume between the blades of each # _ at the operating point (1) and the position of the 苇Hs piece 在 plate at the operating point (2), and the blank diamond symbol indicates 乍(2) The relationship between the blade of the mother blade and the blade of the blade, the position of the blade of the second & r ri is the volume of the blade and the blade of the blade at the action point (3). The relationship between the positions of the sheets I: the sheet image 'the inner circumference side of the inner circumference side of the inner side of the two m3 blades (blade plates) of the fan 1 on the outer peripheral side of the fan 1 shown on the vertical axis The outer peripheral side of the blade is turned upside down. In addition, the position of the blade plate shown on the horizontal axis of Fig. 7 is that the two pieces of the cymbal plate are divided by ~12 hours. The position of the plate is replaced by the position of the short needle in Figure 7 - _. The operation points (1) to (8) of the figure indicate the same operating point as the first action point (1) to the action point (8). Attached,: Figure 7 shows that the situation near the 30 points when the position of the blade plate is located is 'the more the air volume between the blades on the open side The smaller the amount of wind between the sheets, the larger the ^ / 〇 ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' Γ 。 。 。 。 。 。 。 。 。 。 。 。 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌 肌eQl6 Equation (7) W 〇: Σ Q i 3 Therefore, the distribution of the air volume Qi between the blades is more uniform, the noise value of the muscle and

2148-9915-PF 13 201002944 The smaller the fan input value w. That is, as shown in Fig. 4, in the case of the operating point (1) close to the unstable area, since the distribution of the air volume Qi between the blades is uniform, the specific noise Ks becomes the minimum value, and as shown above, On the contrary, the closer the moving point is to the unstable area, the closer to Le/He= f ( $ ), although the smaller the noise Ks becomes, the more the L()/H()= f ( $ ) is exceeded. Located in an unstable area, it is worse than the noise Ks. On the other hand, the action point is farther away from the open side than the unstable area, in the tongue of the shell (2bl shown in Fig. 3), or the distance between the bell mouth and the fan is short, because the static change becomes larger. Therefore, it is easy to generate abnormal sounds. Therefore, it is assumed that 0 < nS : l and nxf ( f.), when the loss coefficient is small (the air volume is large and the ventilation resistance is small), that is, in the range of 4, when the minimum n of the abnormal sound is not generated, n = 〇75. Therefore, in the case where the loss coefficient is small (the air volume is large and the ventilation resistance is small), it is possible to form a flow that is smaller than the noise Ks and does not generate an abnormal sound. In the above description, the case where the height of the anatomical shell is η^246μ will be described. Next, the case where the size of the eagle-like height is generalized will be described as a constant, and the case where the size of H, Ln=kDQq changes, the law of self-similarity, :P And Q, the mathematical formulas shown below (Formula (3) and (4)) are established. Here, the N system speed. After the formula (3) is sorted, the (5)th (4) formula Q=Q°(D/D〇)3(N/N.) is obtained. The equations (3) and (4) are eliminated. /n. formula. 2148-9915-pp 14 201002944 Equation (5) P°/Q°2= P/Q2(D/D.)3 will be n/Q2, D,. Substituting the equation (6) to obtain the formula U) By using the equation (6) and H = kH8 and L = kLe, 〇·ΐ44〇·4 can be generalized. . Price. ) "./...". ) 〇, L/HS f(k4|:). 〇. 75f(k4f )s that is, in the case where the fan i is used for the air conditioner under the fan, the condition of the enthalpy and the phase loss coefficient of the heat exchanger is small (the wind force is small) By widening the width of the fan: 通风 'ventilation resistance and the speed distribution in the width direction of the heat exchanger is reduced to a small sound, the power consumption of the repeater is unnecessarily increased. - L, so the second is that the sirocco fan 1 is a single suction type. The above L is replaced by L/2iQ and replaced with Q/. If you set 2) 2}, then η = 1.3978; α^2

'2-H〇8(k^)H.8^ 1.5g(k4n^L/H^2g(k,f )〇J In the case of Luo Ke fan i〇〇 is a single suction type, at 01^β By making 15g(k4|: )SL/H'2g(k4F ), it is possible to form a unit that is smaller than the noise Ks and does not generate abnormal sounds. The situation of the Luo Ke fan i 〇〇 〇〇 疋 疋 疋 疋 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西 西隋 求 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 N 单元 单元 单元 N N N N N N N N N N N N N Here, in the case where the unit is loaded with m fans, the air volume of one fan is Ql/m, the static pressure is L, and the loss coefficient can be obtained. The production, brother knows that 'in the West Loko fan ^ The range of .=f=〇.4 of the double suction type can be made smaller than that by making 〇=咖': I: / Τ fan 10. For the single suction type, in 〇1 ::: Li: Made by her, her coffee is away from... and can be formed smaller than Zhu S Ks The flow of stability. The ninth: the figure shows a schematic cross-sectional view of the longitudinal cross-sectional structure of the bell mouth 3. Fig. 1 is a perspective view of the sirocco fan 1 of the area α without the mouth 3; Lan + Guang, , ... the part of the area of the slave's alpha on the wall of the beast: two:: the area of the rms value "partial enlargement. 11 map shows the domain two == part of the wall on the _ moving value Area == According to Fig. 8 to Fig. 11, the surface comparison is performed in such a manner that the & difference is formed on the side of the dome 2, the ι.., ? The features of the bell mouth 3 mounted on the sirocco fan 1 (10) are described on the side of the vertical fan 100 side of the squirrel 3 shown in Fig. 8. Point (in the bell mouth 3 ^ 'set west each wind ^ A ' ^, the end of the opening °p) point A and: point to the center of the bell mouth 3 and point A, point symmetry point), the other side The end point (the end of the largest opening of the mouth 3 is a line which is the point β and the point B for 浐喈q, (the point which is =1 point symmetry), and the direction drawn from the point Β to the fan] Spiral shell 2 side β 'to the kitchen The point is point C, the line drawn from the direction of the point feather and the side of the volute casing 2 (4) 2148-9915-PF 16 201002944 point C, the intersection of the section AA' and the extension of the shaft of the fan 1 is the point ' 。 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤 钤The rms value of the static pressure fluctuation other than the area α at time 5% is about 5 [mm], and rm [Pa] is taken as an example. In Fig. 9 to Fig. 11, as shown in Fig. 8, according to the mounting method of the bell mouth 3, the static pressure variation of the step formed on the side of the scroll case 2 is compared and the step difference is not formed on the side of the petal case 2. The static pressure of the person changes. Hereinafter, the definition formula of the ~11^ value of the static pressure fluctuation is shown. ((P)(ps) = ps + ps, rms value of (8) = {( Σ ps' (t) 2)}0.5 Here, ps represents the time average, and Ps, (t) represents the static pressure The larger the rms value of the static pressure change on the wall, the greater the noise generated from the wall surface. From the 1st and nth figures, the static pressure variation ratio of the side surface of the shape of the shell 2 is In the case where the step of the clamshell 2 is not formed, the static pressure fluctuation is small. Because of &, the noise generated on the side of the casing 2 can reduce the noise generated. Fig. 12 shows the schematic cross-sectional structure of the sirocco fan 1 (10). The longitudinal section view 'Fig. 13 is a perspective perspective view showing the Xiluo winds. According to Fig. 12 and Fig. 13, the area of the nns value of the static pressure change of the Xiluo fan is shown. Further, in Fig. 12, the portion closest to the outer circumference of the fan i is illustrated as a tongue from the curved portion of the air passage & to the air outlet 31 which constitutes the scroll casing 2 of the sirocco fan 1部卜2148-9915-PF 17 201002944 In Figure 13, the point A, the point 〇 and the point A' 4 4: the parent line passing through the plane and tongue of the figure 8 , the wind is ▲ point is shown as n 2 " the distance becomes the smallest horse "', i D, and the mouth of the bell 3; η Tian is at the point. Friends, point D is close to the point shown as Point Ε, bit "., occupying the center as the center from the point E of the fan 丨 is the point F, located in the η & * shirt direction 65 point of the graphic side, U point 0 as the center from the point F of the wind夕Et solid - the point of view of the reverse direction of the fan 1 is not the point G, and is located at the point 〇 centered on the south η. The point of the rotation direction 40 of the fan 1 of '."έ F For point H,

The M1 household 1 aa ^ 1 is in the direction of rotation 180 of the fan 1 from the point F centered on the point 〇. The point is shown as the point where the pressure of the situation in the derogatory area is r ^ brothers know that the rms value of the static main sill of the sirocco fan 100 is large, ^ ^ ^ your contact point The area of the substantially fixed arc HFG of Η, point F, and point G. Therefore, the length of the line segment BC of the line BC in the circular arc HFG is Χ, and the length of the line segment BC in the approximate arc HIG (the arc connecting the τ τ Λ reverse point Η, the point I and the point G) is In the case of γ, the dry circumference of L/H$ f( f ) or L/HS g( f ) is obtained as ^χ>γ 2 〇

Estimated ping, 7 dry orders 3, the MS value of the static pressure change can be made small and the noise can be made smaller. As shown in Fig. 10 and Fig. 11, for example, 丄H jin does not form a step difference on the side of the volute casing 2, and the rms value of the static pressure fluctuation in the region of the circular arc HFG is the largest I' and the (4) (4) 2 side faces are formed with a step difference. In the case of the 'fourth value of the static pressure fluctuation in the region of the circular arc HFG, the maximum value becomes a step on the side of the volute casing 2, and the team 7 , , 曰, and the noise of the bell mouth 3 are reduced. The reason for this is that the length of the line segment BC is long because the distance between the 'wind and the wind' is longer than the length of the line segment BC, and the static pressure fluctuation due to the rotation of the fan 1 is suppressed. Brother 1 4 shows the siro fan 1 0 0 by moving your muscles ^ 乍 Β

2148-9915-PF 18 201002944 P Q characteristics of the graphics.炸姑黎, According to Fig. 14, the p-Q characteristics of the case where the sirloin of the scorpion shell 2 is 1 ΓΪ, S, ra t η L feathers pass through the point B

And on the side of the volute shell 2 is not shaped as a jasmine + ^ A

The P-Q characteristic of the case of passing the point B is not the result of the #西洛可扇丨0〇. * Chu 1 back in Figure 14 'black circle mark indicates that the west side of the volute case 2 is formed, 夂a ra e , nn ~ the p-Q characteristic of the fan 100, blank 0 § 5 (3⁄4 table) Not in the sentence 9 丨 丨 - J - 4 * TTy» 1 f The P-Q characteristics of the sirocco fan 100 that does not form a step on the side of the 2 sides. Also, too poor id π In the 14th figure, the vertical axis represents static The pressure P[Pa], the horizontal axis represents the air volume Q [m3/min; |. The 14th ® shown in the side of the 蝎-shaped shell 2 is a section of the West Loco fan 1 0 0 and in the volute < 2 When the side is not formed, the sirocco fan i 〇〇 is relatively unsettled, and the 'the open side of the snail shell 2 is slid into the air conditioner, or In the case of a unit such as a dehumidifier or an air cleaner, the size limit of the unit may not be able to lengthen the width of the siro fan 1 。. That is, because the width dimension is short, the operating point is less stable than the noise. More regional

In the case of approaching the open side, since the unstable area can be brought close to the operating point, it is effective for low noise. Fig. 15 is a plan view showing the unintentional overall configuration of the suspended indoor unit 110 in which the sirocco fan 1 is not loaded. Fig. 16 is a cross-sectional view showing the longitudinal sectional structure of the suspended indoor unit 110. According to Fig. 15 and Fig. 6, the static pressure variation in the case where the sirocco fan i 〇 形成 is placed on the side of the snail-shaped device to the rocker to the inner machine 11 〇. Further, in Fig. 15, there is no case where two sirocco fan blades are loaded and the suction space 5 is formed on the side of each of the sufficient directions. Also, in Figure 6, it is indicated by an arrow

2148-9915-PF 19 201002944 The flow of air. In the case where the sirocco fan 1 形成 which forms a step on the side of the dome 2 is mounted on the suspended indoor unit 110, the suction space 5 is reduced by the amount of the step difference due to the step difference formed, and the noise is large. The cause of the cause. The region where the rms value of the above-mentioned static pressure fluctuation is large is the arc hfg, and the rms value of the static pressure fluctuation in other regions is less affected by the distance from the fan 1. Therefore, when the sirocco fan 100 having a step in the region of the circular arc HFG is mounted on the suspended indoor unit 110, the step can be positioned on the downstream side of the suction port 2a, and the amount of decrease in the suction space 5 can be made small. Fig. 17 is a table showing the noise value of the suspended indoor unit 11〇. According to Fig. 17, the noise value generated from the suspended indoor unit of the sirocco fan 100 which is formed on the side of the volute casing 2 is shown, and the step is not formed on the side of the volute casing 2 from I. The noise value generated by the suspension indoor unit U0 of the West Rock Fan i. In addition, it is assumed that the step difference is formed: the area of the circular arc HFG. Further, each represents a noise value when the air volume is 16. As shown in Fig. 17, it is known that the noise value of the step is 42 4_ in the region where the arc HFG is formed when the air volume is 16, and the noise value is 44 〇 in the region of the arc HFG. . Thus, the noise value can be made small by forming a step in the circle < From the above, ## is set by the step in the area of the circular arc HFG, and the decrease in the suction space 5 is suppressed, and the noise value can be made small. Second embodiment

Fig. 18 is a schematic structural view showing a schematic structure of an air conditioning agricultural plant 15 〇 2148-9915-PF 20 201002944 according to a second embodiment of the present invention. Root. According to Fig. 18, the structure of the air conditioner 150 will be described. This empty beta device 150 is loaded with the sirocco fan 100 of the first embodiment. The sirocco fan 1 〇 is used to mount an indoor unit (indoor unit) constituting the air conditioner 1 5 于 in the vicinity of the heat exchanger. In the second embodiment, the differences from the above-described first embodiment will be mainly described, and the same portions as those in the first embodiment will be denoted by the same reference numerals and will not be described. The air conditioner (150) is configured by sequentially connecting a condensing heat exchanger 152, a throttle device 153, and an evaporative heat exchanger 154 with a refrigerant pipe. Here, the sirocco fan 1 of the first embodiment is provided for the indoor unit in which the coagulation type heat exchanger 15 2 or the evaporative heat exchanger 1 4 is provided. That is, the sirocco fan 100 is disposed in the vicinity of the condensing heat exchanger 152 or the evaporative heat exchanger 154 provided in the indoor unit, and has the air supplied to the condensing heat exchanger 152 or the evaporative heat exchanger 154. Features. & fine machine .......... The book is compressed and becomes a state of high temperature and high pressure. The condensing heat exchanger 152 is a heat exchange between air and refrigerant to cause the refrigerant to condense or liquefy. The throttle device 153 depressurizes the refrigerant to expand the person. Evaporative heat exchange = 154 is a heat exchange between air and refrigerant, and the refrigerant is vaporized. By installing the sirocco fan 100, which is the condensed heat exchanger 152 or the evaporative heat exchanger 154, which constitutes the air conditioner 150, the sirocco fan 100 is placed in the air supply unit 150, thereby reducing the communication to the room. noise. Fig. 18 is abbreviated to become high. Here, the arrow indicating the operation of the air conditioner 505 will be briefly described, indicating the flow of the refrigerant. Pressurized by the compressor 15 2148-9915-PF 21 201002944 The warm and high-pressure refrigerant gas flows into the condensing heat exchanger 1 52. In the condensing heat exchanger 152, the refrigerant and the air exchange heat to be condensed, and become a low-temperature, high-pressure liquid refrigerant or a gas-liquid two-phase refrigerant. The refrigerant flowing out of the condensing heat exchanger 152 is then lowered by the throttling device 1 5 3 to become a low-temperature, low-pressure liquid refrigerant or a gas-liquid two-phase refrigerant, and then flows into the evaporative heat exchanger 154. In the evaporative heat exchanger 154, the refrigerant and the air are thermally exchanged and evaporated to become a high-temperature, low-pressure refrigerant gas, which is then sucked into the compressor 1 51. When the greenhouse is in operation, the evaporative heat exchanger 1 54 is loaded in the indoor unit. In the case where the loss coefficient is small and the fan width is wide, the velocity distribution in the width direction of the heat exchanger is nearly uniform, and the heat transfer area of the heat exchanger can be effectively used as compared with the case where the fan width is narrow and the speed distribution is uneven. Therefore, the temperature difference between the air and the refrigerant required to obtain the predetermined air-conditioning performance becomes small, the input power of the compressor becomes small, and it becomes low noise. Further, in the case where the loss coefficient is small, even if the fan diameter does not become large, the noise can be made small as long as the fan width is made wider. Further, in an air conditioner including a plurality of fans having a narrow fan width, by replacing the fan having a wide fan width, even if the number of fans is reduced, the noise value of the air conditioner at a predetermined operating point can be reduced, and The velocity distribution in the width direction of the heat exchanger can be made nearly uniform. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective perspective view showing the inside of a sirocco fan according to an embodiment of the present invention. 2148-9915-PF 22 201002944 Fig. 2 is a vertical diagram of the overall shape of the fan. Fig. 3 shows the J figure. A schematic portrait of the lower sirocco fan. The section of the under-section structure is shown in Figure 4, which shows the figure of the P-Q special girl of the Siluo fan. Inch and K S - Q characteristics Fig. 5 shows the graph of the west, , & y q $ 〆 π , Lo / H 洛 and loss t of the Loco fan. 々 is the day coefficient f. The diagram of Fig. 6 shows the graph of the y characteristic of the genus sylvestris from the p-Q characteristics and the case of Ksi. Fig. 7 is a graph showing the relationship between the air volume between the blades of the mother-slice blade of the wind and the ^ u ^ ¥ feather and the position of the panel. A schematic cross-sectional view of the longitudinal section structure of the 矣 + h nozzle. Figure 9 is a perspective view of a sirocco fan with a thin t b domain (2).

Fig. 10 is a view showing the rms value of the static pressure fluctuation of the portion of the area α which is inferior to the area of the difference α. The enlarged view of the α portion of the value gas region. Figure 11 is a magnified view of the area where the value of the area is abruptly and poorly. The figure is a longitudinal cross-sectional view showing the schematic configuration of the sirocco fan. Fig. 13 is a perspective perspective view showing the sirocco fan. Fig. 14 is a graph showing the 特性-Q characteristic of the sirocco fan passing through the operating point β. Fig. 15 is a plan view showing the schematic overall construction of a suspended indoor unit equipped with a sirocco fan.

2148-9915-PF 23 201002944 ·· Fig. 16 is a cross-sectional view showing the longitudinal sectional structure of the suspended indoor unit. Figure 17 is a table showing the noise values of the suspended indoor unit. Fig. 18 is a schematic structural view showing an unintentional structure of an air-conditioning apparatus according to a second embodiment of the present invention. [Main component symbol description] 1 fan, f' 2 埚-shaped shell, 2 a suction port, 2b air outlet, 2 bl tongue, 2c wind road, 3 bell mouth, 4 tongue, 5 suction space, 1 0 0 west Rocko fan, 110 floating indoor unit, 150 air conditioner, 1 51 compressor, 152 condensing heat exchanger, 153 throttling device, 1 5 4 evaporative heat exchanger 2148-9915-PF 24

Claims (1)

201002944 X. Patent application scope: 1. A siro fan, comprising: a volute shell having a suction port for taking in air, a blow outlet for blowing air, and from the suction port to the a wind passage for blowing the outlet; the fan' is housed in the volute casing, and is driven by the rotation to take in air from the suction port and blow air from the outlet; and the bell mouth is attached to the volute casing The suction port is characterized in that: the suction port is located on an extension line of the center of rotation of the fan, and is formed on both sides of the lancet, and the ventilation resistance in the air path is p[pa], The amount of air taken in from the suction port AQ[mVmin], the constant of the fan, and the height of the volute casing are the H-five coefficient f [paAmVmin) 2], in the case of 〇.l Range of $k4f S0.4, for f(k4 f ) = 〇.34947(k4 f V __ ί nr 0 71^m~ I 0554(k4 f ) + 1. 8, u.75f(k ^ ) ^ L /H^ f (k4 ^ ) 〇2. The wind path of the volute casing of the ith of the patent application scope to the bend of the air outlet (five) is out of the fan The part of the part serves as the tongue, and the part is closest to the longitudinal section of the bell mouth, and the end of the smallest opening of the mouth is set to be the point a in the bell mouth, 钤f The center and the end point of point A are point B, and the point of the hanging woman at the mouth is point A', 2148-9915-PF 25 mouth in / m4 set from the point β to the fan::, symmetrical The point is point B, the intersection point is point c, and the line drawn from the point β to the side of the volute and the intersection of the fan and the face is the point c, the line drawn by ° and the snail The line side of the shell side f is the point where the intersection of the extension line passing through the point of the fan is the point 〇, and the intersection line 'will be the smallest with the point: the point A, the plane and the point of the tongue and the bell mouth. The point is set to point D', and the point h is the point E, and the point 〇 is the center. The point is the point F, .. E. The reverse direction of the fan is set to 40 at this point. The point is the point G, ''', 叱~ point F, the direction of rotation of the fan in the reverse direction of the fan, and the fan § at the point F is located at the point 〇 , 4〇. The point is point H, located at the point 〇; the direction of rotation 180. The point is point j, the point F and the point 砹 is connected to the length of the line segment BC is set to X. When the length of the line H, the point I, and the line segment BC of the substantially circular arc Hig of the point G is γ, in the range of L/HSf(k1), X>Y2 0 is formed. 3. A kind of sirocco fan, including : The volute casing has a suction port for taking in air, a blow port for blowing air for 2148-9915-PF 26 201002944, and a wind passage from the suction port to the blow port; the fan is received In the volute casing, air is taken in from the suction port by the rotational driving and air is blown from the air outlet; and the bell mouth is attached to the suction port of the S-shaped volute casing. And the suction port is located on an extension line of the center of rotation of the fan, and is formed on a single side of the 5 snail-shaped shell, and the ventilation resistance in the air path is p[pa], and is taken in from the suction port. The amount of air is n ], τ " Ί 】 The width of the fan in the direction of the axis of rotation is L [mm], k is a constant, the volute casing. , ^ "The question is shame 246k[nnn], P/Q2 is the phase loss coefficient, [Pa/(mVmin) 2], in the range of 〇. $〇·4, create: 2: Please patent scope The sirocco fan of the third item, wherein the wind path of the volute casing to the portion of the bend that is closest to the outer exit of the 哕JiT The longitudinal section of the mouth, ',, ·. In the smallest mouth of the mouth, ^ ^ 丨 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每 每Β, X ', , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The side of the volute casing 214 8-9915-pp 27 201002944 is set from the point B, the intersection point to the n-plane is the point c, the straight line drawn in the direction of %, and the side of the dome-shaped shell § the line segment ΑΑ ' and - female η 士 艺 ~ Fan's axis extension line intersection point A Et η In this point, 社, 社 咏 又 又 又 又 又 ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° The point where the distance between the thousand face and the a-th and the wing of the * is the smallest is set to the point D, - the point closest to the point D of the bell is the point E, and is located at the point of n 65. The point F/center is the direction in which the fan is reversed from the point E. The point of the reversal of the fan from the point F at the point n is ,,·, 〇 is the point g. Direction The point from the point F to the point of rotation of the fan from the point F is the point H' which is located at the point 180 from the point of rotation of the point. The point is that the fan is connected to the point. 1! The length of the line segment BC at which the point F and the point G is large is X, and HF (5 is again when the length of the line segment BC connecting the point Η, the point I, and the substantially circular arc Hig of the point G is γ In the range of L/HS g(k4 f ), X>Yg 0. 5 · A type of two-tone device, which is characterized in that a sirocco fan as in any one of claims 1 to 4 is used. 2148-9915-PF 28