JP3642016B2 - Sirocco fan and humidification unit equipped with it - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sirocco fan and a humidifying unit including the same.
[0002]
[Prior art]
Conventionally, as shown in FIG. 4, a sirocco fan includes a scroll 42 and an impeller 43 that is accommodated in the scroll 42 and fixed to a rotating shaft 47 of a fan motor 44. When the impeller 43 is rotated by driving the fan motor 44, the air flowing in the direction of arrow A in the suction passage 405 above the impeller is lowered from the suction port 50 of the bell mouth 49 as indicated by arrows B and C. Then, as shown by an arrow D, the air is discharged from the outlet 45 of the scroll 42 to the outside.
[0003]
[Problems to be solved by the invention]
However, in the conventional sirocco fan, the gap between the end face 42a of the scroll 42 on the impeller 43 side and the bottom 43a of the impeller 43 is shown as shown in the large circle enlarged in FIG. Therefore, a part of the air blown from the impeller 43 is caught in the gap, and an air flow as indicated by an arrow T is generated. As a result, there are problems that the air volume is reduced, the noise is increased, and surging is likely to occur.
[0004]
Therefore, an object of the present invention is to provide a sirocco fan that can reduce noise and that does not easily generate surging, and a humidifying unit including the sirocco fan.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the sirocco fan of the invention of claim 1 is a sirocco fan comprising a scroll and an impeller accommodated in the scroll, so that the sirocco fan is positioned at a portion on the outlet side of the scroll. A baffle plate is erected on the end surface of the scroll on the impeller side, and the baffle plate is entirely over the portion of the impeller facing the blowout port, and the bottom (3a) of the impeller (3). It is characterized by extending in an arc shape so as to be close to the peripheral edge.
[0006]
According to the sirocco fan of the first aspect of the present invention, since the arc-shaped baffle plate is erected on the end surface on the impeller side of the scroll so as to be located at the portion on the outlet side of the scroll, the impeller Is not caught between the scroll and the impeller, and flows smoothly and is discharged through the scroll outlet. Therefore, the blown air flow of the impeller is not disturbed, and the air volume increases.
[0007]
In addition, since the blowout air of the impeller flows smoothly without being caught between the scroll and the impeller, noise can be reduced and the occurrence rate of surging can be reduced.
[0008]
The sirocco fan of the invention of claim 2 is characterized in that, in the sirocco fan of claim 1, the baffle plate is curved over an angle range of about 90 degrees.
[0009]
According to the sirocco fan of the second aspect of the invention, the baffle plate is curved over an angle range of about 90 degrees and is located at a part on the outlet side of the scroll. Entanglement between the scroll and the impeller can be reliably prevented.
[0010]
A sirocco fan according to a third aspect of the present invention includes a humidification rotor, a moisture absorption passage that passes through the humidification rotor, a moisture absorption side blower unit provided in the moisture absorption passage, a humidification passage that passes through the humidification rotor, and the humidification passage. A humidifying unit comprising a humidifying air blower unit provided in a passage and a heating means for heating the air in the humidifying passage, wherein the sirocco fan of claim 1 or 2 is used as a moisture absorbing air blower unit. Yes.
[0011]
According to the humidification unit of the third aspect of the invention, since the sirocco fan is used as the moisture absorption side air blowing unit, the air flow rate in the moisture absorption passage is unlikely to fluctuate, and the humidification rotor stably and reliably absorbs moisture from the air in the moisture absorption passage. can do.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a sirocco fan of the present invention and a humidifying unit including the sirocco fan will be described in detail with reference to the illustrated embodiments.
[0013]
FIG. 1 is an exploded perspective view of a humidifying unit including a sirocco fan according to an embodiment of the present invention. As shown in FIG. 1, the humidifying unit includes a main body frame 101, a humidifying rotor 102 that is rotatably fitted to the shaft portion 103 of the main body frame 101, a humidifying passage 104 that passes through the humidifying rotor 102, and a hygroscopic passage 105. And has. The humidification side fan unit 106 is installed in the humidification passage 104, and the sirocco fan 1, which is a moisture absorption side fan unit, is installed in the moisture absorption passage 105. The air flowing through the humidifying passage 104 is heated by a heater 108 as a heating means. Reference numeral 107 denotes an upper lid attached to the upper part of the main body frame 101.
[0014]
FIG. 2 is a view of the humidification unit as viewed from above. 3 is a cross-sectional view taken along line III-III in FIG. In FIG. 2, illustration of the flow path cover 11 attached on the bell mouth 9 is omitted. Moreover, in FIG. 3, the principal part enclosed with the small circle is expanded and it has illustrated in a great circle.
[0015]
As shown in FIG. 3, the sirocco fan 1 includes a scroll 2 and an impeller 3 that is accommodated in the scroll 2 and is fixed to the rotating shaft 7 of the fan motor 4. A plurality of blades 8 are provided on the peripheral portion of the impeller 3 at a predetermined interval in the circumferential direction. A bell mouth 9 having a suction port 10 is disposed above the impeller 3. The scroll 2 has a blowout port for discharging the air sucked from the suction port 10 of the bell mouth 9 to the outside, and the end face 2a on the impeller 3 side of the scroll 2 is rectified as a baffle plate. Ribs 6 are erected. As shown in FIG. 2, the rectifying rib 6 is formed so as to be positioned at a portion on the outlet 5 side of the scroll 2. Further, the entire rectifying rib 6 extends in an arc shape along the peripheral edge of the impeller 3 and is curved over an angle range of approximately 90 degrees.
[0016]
According to the sirocco fan 1 having the above-described configuration, when the fan motor 4 is driven and the impeller 3 rotates, the air flowing in the direction A through the moisture absorption passage 105 flows from the suction port 10 of the bell mouth 9 to the arrows B, C, After being sucked in the E and F directions, it is discharged from the outlet of the scroll 2 in the direction of arrow D. At this time, since the flow regulating rib 6 is erected on the end surface 2a of the scroll 2 on the impeller 3 side, the blown air of the impeller 3 is sent to the end surface 2a of the scroll 2 on the impeller 3 side and the bottom 3a of the impeller 3. 3 and flows into the smooth as shown by an arrow S in FIG. 3 and is discharged from the outlet of the scroll 2 to the outside. As a result, the blown air flow of the impeller 3 is not disturbed, and the air volume in the moisture absorption passage 105 is increased.
[0017]
Further, since the air blown from the impeller 3 flows smoothly as shown by the arrow S, noise can be reduced, surging is unlikely to occur, and so-called surging resistance is improved.
[0018]
Also, because they erected the rectifying ribs 6 on the end face 2a of the scroll 2, for example, water that has entered from the air outlet can be prevented from coming into contact with the fan motor 4.
[0019]
Further, since the baffle plate is curved over an angle range of about 90 degrees and is located at a portion on the outlet 5 side of the scroll 2, the air blown out from the impeller 3 is generated between the scroll 2 and the impeller 3. It can be surely prevented from being caught in between.
[0020]
Further, in the humidification unit, the sirocco fan 1 is used as the moisture absorption side air blowing unit, so that the air flow rate in the moisture absorption passage 105 is unlikely to fluctuate, and the humidification rotor 102 can stably and reliably absorb moisture from the air in the moisture absorption passage 105. it can.
[0021]
【The invention's effect】
As is clear from the above, the sirocco fan of the invention of claim 1 has an arc-shaped baffle standing on the end face of the scroll impeller side so as to be positioned at the scroll outlet side portion. The air blown from the impeller is not caught between the scroll and the impeller, and the air volume can be increased.
[0022]
In addition, since the blowout air of the impeller flows smoothly without being caught between the scroll and the impeller, noise can be reduced and the occurrence rate of surging can be reduced.
[0023]
In the sirocco fan according to the second aspect of the invention, since the baffle is curved over an angle range of about 90 degrees and is located at a portion on the outlet side of the scroll, the blowout air of the impeller is supplied to the scroll and the blade. It can be surely prevented from getting caught between cars.
[0024]
Since the humidification unit of the invention of claim 3 uses the sirocco fan of claim 1 or 2 as a moisture absorption side blower unit, the air flow rate of the moisture absorption passage is unlikely to fluctuate, and the humidification rotor is stable from the air of the moisture absorption passage. Can absorb moisture reliably.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a humidifying unit including a sirocco fan according to an embodiment of the present invention.
FIG. 2 is a top view of the humidification unit.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a cross-sectional view of a conventional sirocco fan.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sirocco fan 2 Scroll 2a End surface 3 Impeller 3a Bottom part 5 Air outlet 6 Rectification rib

Claims (3)

In a sirocco fan comprising a scroll (2) and an impeller (3) accommodated in the scroll (2),
A baffle plate (6) is erected on the end surface (2a) of the scroll (2) on the impeller (3) side so as to be positioned on the side of the outlet (5) of the scroll (2). The baffle plate (6) is circular so that all of the baffle plate (6) is close to the periphery of the bottom (3a) of the impeller (3) over the portion of the impeller (3) facing the outlet (5). A sirocco fan characterized by extending in an arc. The sirocco fan according to claim 1,
A sirocco fan characterized in that the baffle plate (6) is curved over an angle range of approximately 90 degrees. A humidification rotor (102), a moisture absorption passage (105) passing through the humidification rotor (102), a moisture absorption side air blowing unit provided in the moisture absorption passage (105), and a humidification passage (via the humidification rotor (102)) 104), a humidifying unit provided with a humidifying air blowing unit (106) provided in the humidifying passage (104), and heating means (108) for heating the air in the humidifying passage (104),
A humidification unit characterized in that the sirocco fan (1) according to claim 1 or 2 is used as a moisture absorption side blower unit.

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