JP3582469B2 - Centrifugal fan device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a centrifugal fan device used for, for example, an air conditioner or a humidifier.
[0002]
[Prior art]
Conventionally, as this type of centrifugal fan device, there is one as shown in FIGS. As shown in FIG. 4, the centrifugal fan device includes a sirocco fan 1 and a suction passage 2 extending to one side in a lateral direction above the sirocco fan 1. In the sirocco fan 1, a rotor 5 fixed to a rotating shaft 4 of a motor 3 is arranged in a casing 6, and air is sucked downward from a bell mouth 8. On the other hand, the suction passage 2 extends in a direction perpendicular to the rotation axis 4 of the sirocco fan 1 and to the right with respect to the sirocco fan 1. 3 and 4, air sucked from the right side of the suction passage 2 as shown by an arrow X is drawn into the sirocco fan 1 from a bell mouth 8 as shown by arrows S and T, and an arrow Y As shown in the figure.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned conventional centrifugal fan device, since the suction passage 2 extends in a direction orthogonal to the rotation shaft 4 of the sirocco fan 1 and only to the right, air (wind) flowing through the suction passage 2 is As shown by arrows S and T in FIG. 3, the air is sucked into the sirocco fan 1 from the inside of the bell mouth 8, that is, from the right area of the suction port 10, but the wind does not reach the inside of the suction passage 2, that is, the left end. However, there is a problem that the air is not sufficiently sucked from the left region of the suction port 10. As described above, since the intake air volume of the intake port 10 of the sirocco fan 1 is not well-balanced, there is a problem that noise increases and surging easily occurs.
[0004]
Therefore, an object of the present invention is to provide a well-balanced suction air volume at a suction port even when gas is sucked from a suction passage extending to one side of a centrifugal fan, reduce noise, increase air volume, and increase surging. It is an object of the present invention to provide a centrifugal fan device which is less likely to cause the problem.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the centrifugal fan device according to the first aspect of the present invention
In a centrifugal fan device including a centrifugal fan and a suction passage extending in a direction intersecting with the rotation axis of the centrifugal fan and one side of the centrifugal fan,
In the suction passage, a partition guide member for guiding the gas to the back of the suction passage is provided ,
The partition guide member divides the inside of the suction passage into two or three or more passage areas, and divides a suction port into two or more areas,
The airflow flowing through one of the passage areas is sucked from one area of the suction port, while the airflow flowing through the other one of the passage areas reaches the inside of the suction path and the other one of the suction ports. It is characterized in that air is sucked from the area and air flows flowing through the plurality of passage areas (W1, W2) do not merge with each other until they are sucked into each area of the suction port .
[0006]
According to the above configuration, the gas flowing through the suction passage is guided to the inside of the suction passage by the partition guide member. Therefore, the centrifugal fan can sufficiently suck the gas from the area deep in the suction passage, and can suck the gas from the entire area of the suction port in a well-balanced manner. Therefore, the noise can be reduced, the air volume can be increased, and the resistance to surging can be improved (surging can hardly occur).
[0007]
A centrifugal fan device according to a second aspect of the present invention is the centrifugal fan device according to the first aspect, wherein the partition guide member is curved so as to give a pre-swirl to a suction airflow of a suction port of the centrifugal fan. Features.
[0008]
According to the above configuration, the suction airflow that flows through the suction passage and is sucked into the centrifugal fan is pre-rotated by the curved portion of the partition guide member. Therefore, the efficiency of the centrifugal fan is improved, and the air volume is increased.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
The centrifugal fan device according to this embodiment differs from the centrifugal fan device shown in FIGS. 3 and 4 only in the configuration of the suction passage 22 as shown in FIGS. Therefore, the same components as those of the conventional example shown in FIGS. 3 and 4 are denoted by the same reference numerals, and the description thereof will be omitted or simply described, and only different components will be described in detail.
[0012]
As shown in FIG. 2, the suction passage 22 is disposed above a sirocco fan 1 as an example of a centrifugal fan. The suction passage 22 extends only to the right in a direction orthogonal to the rotation shaft 4 of the sirocco fan 1.
[0013]
As shown in FIGS. 1 and 2, a curved partition guide member 23 is provided in the suction passage 22 to divide the inside of the suction passage 22 into two passage areas W1 and W2. The passage area W1 includes most of the portion corresponding to the maximum work area (predetermined large work area indicated by M in FIG. 1) M of the sirocco fan 1, and includes the suction port 10 inside the bell mouth 8. In FIG. 1, it includes a region opposed to most of the right side and most of the lower side. On the other hand, the passage area W2 reaches the inside of the suction passage 22 (the left end in FIGS. 1 and 2), and receives the airflow sent from the right side as shown by an arrow X in FIGS. , That is, to the left end, and further downward in FIG.
[0014]
The curved portion 23a of the partitioning guide member 23 is provided with an airflow sucked into the suction port 10 of the sirocco fan 1 and, as shown by arrows S, V, U and T, a turning direction given by the rotor 5 of the sirocco fan 1 to the airflow. By giving a pre-turn in the same direction, the efficiency is improved and the air volume is improved.
[0015]
In the centrifugal fan device having the above configuration, the airflow flowing in the suction passage 22 as indicated by the arrow X flows through the two passage areas W1 and W2 divided by the partition guide member 23. The airflow flowing through the passage area W1 is sucked from most of the right and lower areas of the suction port 10 in FIG. 1 as indicated by arrows T and U, while the airflow flowing through the passage area W2 is It reaches to the back, and is sucked as shown by arrows S and V from most of the left and upper regions in FIG. Therefore, the sirocco fan 1 can sufficiently suck the gas from the area deep in the suction passage 22, and can suck the gas from the entire area of the suction port 10 in a well-balanced manner. Therefore, noise can be reduced, the air volume can be increased, and surging can hardly occur.
[0016]
Further, the suction airflow flowing through the passage areas W1 and W2 of the suction passage 22 and sucked into the suction port 10 of the sirocco fan 1 is, as shown by arrows S, T, U and V, a curved portion 23a of the partitioning guide member 23. Gives a pre-turn. Therefore, the efficiency of the sirocco fan 1 is improved, and the air volume is increased.
[0017]
Furthermore, since the curved portion 23a of the partition guide member 23 is curved so as to surround a region corresponding to most of the maximum work region M of the sirocco fan 1, a pre-swirl flow particularly effective in the maximum work region M is provided. Made. Therefore, the efficiency of the sirocco fan 1 can be further improved, and the air volume can be increased.
[0018]
5 and 6 show another embodiment. In this embodiment, the sirocco fan 101 rotates in the direction opposite to that of the sirocco fan 1 of the previous embodiment, and the partition guide member 123 curves in the opposite direction to the partition guide member 23 of the previous embodiment. ing.
[0019]
In the centrifugal fan device having the above configuration, the airflow flowing in the suction passage 122 as indicated by the arrow X flows through the two passage regions W1 and W2 divided by the partition guide member 123. The airflow flowing through the passage region W2 is sucked from the right and upper regions of the suction port 10 in FIG. 5 as indicated by arrows S and V, while the airflow flowing through the passage region W1 reaches the inside of the suction passage 22. As shown by arrows U and T from the left and lower regions of the suction port 10 in FIG. Therefore, the sirocco fan 101 can sufficiently suck the gas from the area deep in the suction passage 122, and can suck the gas from the entire area of the suction port 10 in a well-balanced manner. Therefore, noise can be reduced, the air volume can be increased, and surging can hardly occur.
[0020]
Further, the suction airflow flowing through the passage areas W1 and W2 of the suction passage 122 and sucked into the suction port 10 of the sirocco fan 101 is, as shown by arrows S, V, U, and T, caused by the curved portion of the partition guide member 123. , A pre-turn is given. Therefore, the efficiency of the sirocco fan 101 is improved, and the air volume is increased.
[0021]
In the above embodiment, one partition guide member 23 is provided. However, a plurality of partition guide members may be provided so that the inside of the suction passage is divided into three or more passage areas so that the air flow can reach the inside of the suction passage.
[0022]
Further, in the above embodiment, the suction passages 23, 123 extend to one side in a direction orthogonal to the rotation axis 4 of the sirocco fans 1, 101, but the suction passages intersect the rotation axis obliquely, and It may extend to either one side.
[0023]
In the above-described embodiment, the sirocco fans 1 and 101 are used as the centrifugal fans of the centrifugal fan device. However, the centrifugal fan is not limited to the sirocco fan.
[0024]
【The invention's effect】
As is apparent from the above, according to the first aspect of the present invention, a partition guide member is provided in a suction passage extending to one side in a direction intersecting with the rotation axis of the centrifugal fan, for guiding gas to a depth of the suction passage. Therefore, the centrifugal fan can sufficiently suck the gas from the deep area of the suction passage, and can well suck the gas from the entire area of the suction port, so that the noise can be reduced, and The air volume can be increased, and the resistance to surging can be improved.
[0025]
According to the second aspect of the present invention, the suction airflow that flows through the suction passage and is drawn into the centrifugal fan is given a pre-swirl by the curved portion of the partition guide member, so that the efficiency of the centrifugal fan is improved and the air volume is increased. Can be increased.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a centrifugal fan device according to an embodiment of the present invention, which is cut at a suction passage.
FIG. 2 is a longitudinal sectional view of the centrifugal fan device of the embodiment.
FIG. 3 is a cross-sectional view of a conventional centrifugal fan device cut at a location of a suction passage.
FIG. 4 is a longitudinal sectional view of the conventional centrifugal fan device.
FIG. 5 is a cross-sectional view of a centrifugal fan device according to another embodiment of the present invention, which is cut at a suction passage.
FIG. 6 is a longitudinal sectional view of the centrifugal fan device of the embodiment.
[Explanation of symbols]
1, 101 Sirocco fan 4 Rotary shaft 10 Suction port 22, 122 Suction passage 23, 123 Partition guide member 23a Curved portion M Maximum work area

Claims (2)

A centrifugal fan (1,101) and a suction extending in a direction intersecting with a rotation axis (4) of the centrifugal fan (1,101) and at one side with respect to the centrifugal fan (1,101). A centrifugal fan device having a passage (22, 122);
Partition guide members (23, 123) are provided in the suction passages (22, 122) to guide the gas to the interior of the suction passages (22, 122) .
The partition guide members (23, 123) divide the inside of the suction passage (22) into two or more passage regions (W1, W2), and divide the suction port (10) into two or more regions.
The airflow flowing through one of the passage areas (W1) is sucked from one area of the suction port (10), while the airflow flowing through the other one of the passage areas (W2) flows through the suction path (22). It reaches to the back and is made to be sucked from another area of the suction port (10), and the airflow flowing through the plurality of passage areas (W1, W2) is sucked into each area of the suction port (10). The centrifugal fan device is configured so as not to merge with each other . The centrifugal fan device according to claim 1, wherein the partition guide members (23, 123) are curved so as to give a pre-swirl to a suction airflow of a suction port (10) of the centrifugal fan (1,101). A centrifugal fan device characterized by the above-mentioned.

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