TWI352780B - - Google Patents

Abstract

A sirocco fan capable of reducing a noise value and a number of revolutions when obtaining a predetermined air-blowing amount, and an air-conditioning apparatus provided with the sirocco fan are provided. In the sirocco fan provided with a scroll 6, a fan body, which is rotatably disposed in the scroll 6 and includes a large number of blades arranged in a cylindrical manner, and a motor for rotationally driving the fan body, the scroll 6 is provided with two straight line portions 12 and 13 being approximately in parallel with each other on a whorl-like outer shape thereof, and a rotation shaft of the motor is positioned nearer to the straight line portion 12 situated nearer a tongue portion 8 of the scroll.

Description

1352780 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a noise reduction and Rockefeller fan and air blending device. In the prior art, in the conventional technology, in the sirocco fan, the part of the air flow blown by the vortex tube will be from the wind (a): the cock is known to have a countercurrent from the thirsty roll. phenomenon. When a countercurrent center is generated, the flow creates a conflict. ' Not only the air supply volume is reduced, but the noise is increased. 1 The reverse flow phenomenon of the volute is the shape of the bell mouth of the scroll inlet: The area in the circumferential direction changes. (For example,

In addition to the tongue, the auxiliary tongue is placed to protrude from the tongue (2:; 2). [J] Patent Document 1: Japanese Laid-Open Patent Publication No. Hei 9-1-26193 (p. 4-5, Fig. 2) Patent Document 2: JP-A 20 0 6-1 38268 (page 4, Fig. j, Fig. 3) Contents] [Problems to be Solved by the Invention] On the one hand, in the air conditioning device equipped with the conventional sirocco fan, the amount of air blown by the sirocco fan becomes smaller at a predetermined noise value, and the performance of the heat exchanger is lowered. The load of the compressor becomes larger, the COp (performance coefficient) drops 2148-9541-PF, and the Chentf 5 1352780 is low, and in order to suppress the COP reduction, the noise value becomes larger when going, and the amount of blown air of the fan becomes larger θ , . . ° to give the user a feeling of discomfort. And borrowed = this 'the purpose of the present invention is to provide a sirocco fan and change: the air conditioning of the sirocco fan [to make the air volume at a given noise] 5 The noise value and the number of revolutions can be reduced at a given air volume. 其他 The other purpose of the invention is to suppress the inverse of the shape of the scroll, and to maintain the air volume and reduce the noise value.

[Means for Solving the Problem] The sirocco fan of the present month includes a vortex f, a fan body rotatably disposed in the vortex and having a plurality of fins arranged in a cylindrical shape, and a fan body that is rotationally driven The motor, wherein the scroll has two straight portions that are slightly parallel in the outer shape of the scroll, such that the rotation axis of the motor is located at a position close to the straight portion of the tongue of the scroll. [Effects of the Invention] According to the present invention, a sirocco fan includes a scroll, a fan body rotatably disposed in the vortex and having a plurality of fins arranged in a cylindrical shape, and a fan body that is rotationally driven The motor, wherein the scroll has two straight portions in a spiral shape on the outer opening/upward, so that the rotating shaft of the motor is located close to the straight portion of the tongue of the scroll, whereby It can increase the air volume at a given noise level and increase the COP when air conditioning is performed. [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Embodiment 1 2148-9541-PF; Ghentf 6 1352780 'In the first embodiment, a plan view and an internal view of the internal structure of the sirocco fan unit are provided. In the first view, the sei is an indoor unit constituting the inner air conditioner. , including a pair of siro fans, 眸 眸 _ 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 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3.西洛可风扃】目士丁...Father replaced heat ^ ^ Fan 1 has a scroll-shaped scroll 6 and can be rotated

It is disposed in the scroll 6 and is a fan body which is a plurality of fins which are arranged in a cylindrical shape. In the figure, 4 is ^^"^072, n屯 is the rolling and inlet, 5 is the outlet of the cold or warm wind, 7 is the rotating shaft of the fan motor 2, and 8 is the tongue. In the above-mentioned interior, there is a structure of a cold "road" (four) row room (four) cold room with a refrigerant composed of a compressor, a valve, and an evaporator (not shown), and too, every five points, In an example of the first embodiment, the sirocco fan i has a fan diameter of "16", a width of 19 〇, and the number of fins is

The first and second figures of the air conditioning device of the present invention are 0. The heat exchange H 3 has a 12-segment heat transfer tube, and the column spacing of the heat transfer tube is 12.7 liters, and the interval between the segments is 2〇·4_, The length of the heat transfer tube axis is 7〇〇_, the ventilation resistance ΔΡ1 = 23. lVUpaKv: speed [m/s]). The indoor air is taken in from the suction port 4 of the indoor unit 1 and is sucked in axially from the suction port of the scroll 6. The cylindrical fin row that is driven by the fan motor 2 and rotated in the scroll 6 blows air of a dynamic pressure and a static pressure from a discharge port that is opened in the air passage of the indoor unit 10, and is installed in the air passage. The hot parent converter 3 performs heat exchange 'becoming cold air or warm air and blowing out from the air outlet 5 to the room. Fig. 2 is a view showing the positional relationship between the rotation axis of the motor and the erroneous opening 7 2148-954l-PF; the center of the Chentf / ου in the first embodiment of the present invention, and the point 0 is the center of the 7 *Takaguchi 9 and the point is the motor. The center of the shaft of 2 (the center of rotation of the fan). The scroll 6a of the present embodiment has two linear portions 12 and 13 which are slightly parallel in a spiral shape, and the center of the rotating shaft 7 of the fan motor 2 is removed. It is near the straight portion 12 of the tongue 8 of the thirteen tube 6. _, the fan heart ρ is the same as the heart, and the eccentric position is set to the straight line portion J 2 which is biased toward the tongue 8 . Table 1 shows the blowing air in the indoor unit and 1 bm / min, the length of 〇p is Omm, the noise value is 2mm, the length of the rotation OP is 0mm 2mm, the noise value is dB 45.8 45.3 - the number of revolutions rpm Π 10 03 1092~ ~— From Table 1, it can be seen that the hobby is 2 at any time, and the noise value and the number of revolutions become small. Next, the reason will be explained. Table 2 shows the maximum air volume between the wings when the length of the 0P is 〇_ and (4) is U〇3 rpm, the length of the 0P is 2 mm, and the number of revolutions is 1〇9_. The air volume is 16m3/min. Table 2 Maximum airflow between wings at lSmVmin

^ From Table 2, the maximum air volume between the wings is 0 Ρ and the length is 2 with less. The sound pressure shyness is proportional to 6 times the speed. The noise value is expressed by the following equation: SPL = 10 log. 〇(p/p〇)2 [dB] P : sound pressure energy [Pa], p〇: 2xl (T5 [pa] The noise value becomes smaller, that is, in order to make the sound pressure smaller, the speed of the big one becomes smaller. 'Xiloco fan is unevenly distributed between the wings, | 2148-9541-PF; Cheatf 8 1352780 Static pressure fluctuation occurs on the wall surface of the motor support table 14 to become η 喿 在 在 在 在 马达 马达 马达 马达 马达 马达 马达 马达 马达 马达 马达 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 具有 ' ' ' ' ' ' ' ' ' ' ' ' ' Further, the static pressure fluctuation of the wall surface of the motor support base 14 can be suppressed. Further, since the number of revolutions is hardly changed, even if the vent hole 15 is provided in the motor support base 14, the suction space of the sirocco fan does not change.

As described above, the structure in which the vent 15 is provided in the motor support table 14 may be a combination of the above-described first embodiment and the second embodiment. (Embodiment 4) Fig. 7 is a perspective view showing the ribs 16 provided on both sides of the tongue portion 8 of the scroll of the embodiment. Figure 8 is a side view of it. The rib 16 is slightly rectangular, and the point farthest from the fan body 风扇 of the fan 16 is point X, and the point farthest from the fan body j 圆弧 of the arc portion of the tongue portion 8 is point Y, which is closest to the body 11. The point is point Z, and the line χ γ $ χζ. Further, Fig. 9 shows the quick-producing component perpendicular to the air outlet 18 when the rib 16 is not provided. In Fig. 9, the counterflow region 20 of the green main u Dingshan μ of the air outlet 18, which is indicated by the dotted line, flows from the outside to the inside of the fan. In the first figure, in order to prove the countercurrent phenomenon, for example, smoke The flow line when entering from the line 21 on the suction port 17 is indicated. Table 5 shows the noise value and the number of revolutions when the air volume of the indoor unit is 16 mVmin with and without ribs. Table 5 Arpeggio value and number of ribs at 16m3/min with or without noise value dB 44.4 4573 rpm rpm 1077 1092 2148-9541-PF; Chentf 1352780 As shown in Table 5, by setting ribs, the audible value and number of revolutions can be made. Become smaller. / The reason is that when there is a rib without a rib and a flow of a heat exchanger or the like, the ventilating impedance of the damper becomes large, and in the sirocco fan and the human outlet 18 shown in Fig. 9, a wind is generated. The backflow phenomenon of the inside of the fan is blown out. The reason for the increase in the tone value and the number of revolutions. As shown in Figure 10, from

The wind blown between the fins on the main board side flows along the scroll to the two of the scroll, and does not flow into the blowout port 8 near the both ends of the tongue 8, but flows into the gap between the tongue 8 and the fan body 11, Even if it flows between the fins, it is blown from between the fins on the main board side, and the airflow 22 blown to the outside of the scroll is generated. When such a stream of air is caught in the tongue. In the vicinity of the two ends of the crucible, the static pressure fluctuation of the wall surface becomes large, and the airflow passing through the airfoil is increased by a plurality of times, and the air volume circulating inside the fan is increased, and the air pressure of the airfoil is also increased, and the static pressure fluctuation of the airfoil surface is also increased. The value increases. On the other hand, in the case of the rib 16 , the wind blown from the fins on the main board side along the scroll, the net; the 工; Gongshan & n, both ends of the tube, at the tongue 8 In the vicinity of the end, the noise value and the number of revolutions are smaller than those in the case where the flow port 1 which flows into the gap between the tongue portion 8 and the fan body 11 flows into the air outlet 18 and the ribs are not shown in Table 5. Moreover, the width of the rib 16 ranges from 5 to 10 mm. Further, the structure of the rib 16 of the present embodiment may be the structure of any of the above-described first to third embodiments and a combination thereof. BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1a and 1b are schematic plan views and side views of an internal structure of an indoor unit including an air conditioner for a sirocco fan according to an embodiment of the present invention. 2148-9541-PF; Chent 12 1352780 Fig. 2 is a view showing the positional relationship in the first embodiment. The center of the cornice and the center of the rotating shaft are shown in Fig. 4. The fourth embodiment is the horse supporting the σ, the fan motor, and the fan body. Fig. 5 is a perspective view of the motor support table of Fig. 4. Fig. 6 is a perspective view showing the vent opening of the motor support table.

The seventh circle is a schematic view in which ribs are provided at both ends of the tongue portion of the scroll in the fourth embodiment. The eighth is the side of the rib of Figure 7. Figure 9 is a velocity distribution diagram of the outlet of the sirocco fan. Fig. 10 is a diagram showing the phenomenon of backflow of the outlet of the sirocco fan. [Main component symbol description] 1 ~ sirocco fan; 2~ fan motor; 3~ heat exchanger; 4~ suction port; 5~ blower; 6~ scroll; 7~ shaft; 8~ tongue;钤铛口; 1 0~ indoor unit; 11^^fan body; 12--straight line; 13^^ straight part, 14--motor support table; 15, ^ vent; 16--rib; 17- one, 1 8 ~ blowout; 20, ^ countercurrent zone; 2 2 ~ airflow. 2l48-9541-PF; Chentf 13

Claims (1)

1352780 ^ No. 097110727, June 24, 100, revised replacement page X. Patent application scope: 1. A siro fan, comprising: a scroll; a fan body rotatably disposed in the scroll and arranged a plurality of cylindrical fins; and a motor 'rotatingly driving the fan body, wherein the scroll has two linear portions that are slightly parallel in a spiral shape, so that the rotation axis of the motor is located near the vortex The position of the straight portion near the tongue of the tube. 2. A sirocco fan comprising: a scroll; a fan body rotatably disposed in the scroll and having a plurality of fins arranged in a cylindrical shape; and a motor for rotationally driving the fan body The center of the scroll is coincident with the center of rotation of the fan, and the scroll has a straight portion that is slightly parallel in a spiral shape, and the shortest distance between the two straight portions that are slightly parallel is Η ' The straight portions are parallel, and the intersection point between the parallel line passing through the center of the bell recording port and the outer shape of the scroll is point A, and the point on the outer shape of the scroll having the largest shape of the scroll and the center of rotation of the fan is point B, and the center of the fan is rotated. 0, the intersection of the perpendicular line perpendicular to the straight line portion and the straight line portion is point C, point G, and the fan radius is R ', when the angle between the line 〇A and the line 〇B is β, 〇. 72 S2R/HS0.82 '0.3 '(OC-R) 〇.45,0 $7〇. , 〇B^〇c. 3. A sirocco fan, comprising: a scroll tube; a fan body rotatably disposed in the scroll tube and having an arrangement of 2148-9541-PF1 1352780] 24th day of the next year, the replacement page 097Π a plurality of cylindrical vanes 0727, and a motor 'rotatingly driving the fan body, wherein the motor is supported on the support table, and too, +, J, and the suppression is set on the support table The vent of the static pressure that is generated by the fan body. 4. The sirocco fan according to claim 1 or 2, wherein a vent is provided on a support table of the motor. 5. A sirocco fan comprising: a scroll; a fan body rotatably disposed in the scroll and having a plurality of fins arranged in a cylindrical shape; and a motor rotationally driving the fan body, wherein Both ends of the tongue portion of the scroll are provided with ribs that suppress the air backflow phenomenon from the outside of the fan body toward (4). 2. The sirocco fan of claim 2, wherein the ribs are provided at both ends of the tongue of the scroll. An air conditioner comprising the sirocco fan according to any one of claims 1 to 6. 2148-9541-PF1 15