JP2017187242A - Air blowing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an air blowing device capable of shortening the dimensions of a main body box both in a direction of connecting a suction opening and a discharge opening of the main body box and in a direction perpendicular thereto.SOLUTION: An air blowing device has a first fan 4 and a second fan 5 which are installed inside an outer casing 1. The first fan 4 is installed at the most upstream side of a main body air flow, that flows into the outer casing 1 from a box suction opening 2 and flows out from a box discharge opening 3, and is of a double suction type. The second fan 5, which is on the downstream side of the main body air flow, is of a single suction type and is provided with a partition wall 15 separating the suction side of the second fan 5 and the discharge side of the first fan 4. The first fan 4 and the second fan 5 are installed at positions where the second fan 5 does not block a fan discharge opening 13 of the first fan 4, in a state that a fan casing of the first fan 4 and a fan casing of the second fan 5 are contacted with each other via the partition wall 15 and in a state that the axial direction of a motor 6 of the first fan 4 and the axial direction of a motor 6 of the second fan 5 cross each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a blower device in which a plurality of centrifugal blowers are incorporated in a main body box.

  Conventionally, a ventilation device equipped with a plurality of centrifugal blowers has been used as a ventilation device installed in a space behind a ceiling. Such a blower generally has a structure in which a plurality of centrifugal blowers having a centrifugal fan and a driving motor and having suction ports on opposite side surfaces of the fan casing are incorporated in the main body box. Yes. Such an air blower has been devised with regard to a structure for incorporating a centrifugal blower in order to reduce the size of the main body box and simplify the maintenance.

  However, a plurality of centrifugal fans incorporated into the main body box in order to suppress a decrease in air blowing efficiency due to the occurrence of interference between the airflows flowing from the suction port formed in the main body box to the suction port of each centrifugal fan Cannot be placed in contact with each other. Disposing a distance between the centrifugal blowers hinders downsizing of the blower.

  The invention disclosed in Patent Document 1 reduces the size of the main body box in the direction connecting the suction port and the discharge port by arranging the blowers in the direction connecting the suction port and the discharge port of the main body box. Yes. In the invention disclosed in Patent Document 2, the width of the linear flow path from the suction port to the discharge port of the blower main body is narrowed, and the main body is downsized in the width direction.

Japanese Patent No. 5012260 Japanese Patent No. 4661068

  In recent years, there is a tendency to reduce the space behind the ceiling in order to widen the indoor space. In the invention disclosed in Patent Document 1, the dimensions of the main body box can be shortened in the direction connecting the suction port and the discharge port of the box, but the direction connecting the suction port and the discharge port of the box. The dimension in the direction perpendicular to the length becomes longer. In contrast, the invention disclosed in Patent Document 2 can reduce the size of the main body box in the direction orthogonal to the direction connecting the suction port and the discharge port of the main body box. The dimension in the direction connecting the suction port and the discharge port becomes longer.

  This invention is made in view of the above, Comprising: Obtaining the air blower which can shorten the dimension of a main body box in both the direction which connects the suction inlet and discharge outlet of a main body box, and a direction orthogonal to this With the goal.

  In order to solve the above-described problems and achieve the object, the present invention includes a main body box provided with a box body suction port and a box body discharge port on two opposite surfaces, and a plurality of units installed inside the main body box body. Among the plurality of blowers, the blower is installed in the uppermost stream of the main body airflow flowing into the main body box from the box suction port and out of the main body box from the box discharge port. The first blower is a double suction type, and the blowers other than the first blower among the multiple blowers are a single suction type. The plurality of blowers are located downstream of the main body airflow at the position where the blower on the downstream side of the main body airflow does not block the blower outlet of the blower on the upstream side of the main body airflow. Installed in a state where the fan casing of the blower on the side is in contact with each other, and the axial direction of the motor of the blower on the upstream side of the main body airflow and the axial direction of the fan motor on the downstream side of the main body airflow intersect ing.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that the air blower which can shorten the dimension of a main body box in both the direction which connects the suction inlet and discharge outlet of a main body box, and a direction orthogonal to this is produced.

The perspective view of the air blower which concerns on Embodiment 1 of this invention. The perspective view of the air blower which concerns on Embodiment 1. FIG. Side view of the blower according to Embodiment 1 The perspective view of the air blower which concerns on Embodiment 2 of this invention. The perspective view of the air blower which concerns on Embodiment 2. FIG. Side view of the air blower according to Embodiment 2.

  Hereinafter, a blower according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
1 and 2 are perspective views of the air blower according to Embodiment 1 of the present invention. In addition, the upper surface and side surfaces of the box are shown through so that the internal structure can be visually recognized. FIG. 3 is a side view of the air blower according to the first embodiment. The blower according to Embodiment 1 is installed in a space behind the ceiling of a building, and a duct provided on the ceiling is attached to the box body inlet 2 and the box body outlet 3 to suck indoor air. Exhaust is performed by exhausting outside the room.

  The outer casing 1 that is a main body box is provided with a box suction port 2 and a box discharge port 3 on two opposing surfaces. Inside the outer casing 1, a double suction type first blower 4 and a single suction type second blower 5 are installed. The first blower 4 and the second blower 5 include an impeller 11, a motor 6, and a fan casing 7. The first blower 4 sucks in from the two surfaces of the non-motor side blower suction port 12 and the motor side blower suction port 14, and the blower discharge port 13 provided in the fan casing 7 toward the box discharge port 3. Air is flown into. The second blower 5 sucks in from one surface of the blower suction port 17 on the counter-motor side and flows air to the blower discharge port 18 provided in the fan casing 7 toward the box discharge port 3. The first blower 4 and the second blower 5 flow the main body airflow that flows into the outer casing 1 from the box suction port 2 and flows out of the outer casing 1 from the box discharge port 3 into the outer casing 1. Form. 1 and 2, the main body air flow is indicated by arrows.

  In the outer casing 1, the first blower 4 and the second blower 5 are installed so that the first blower 4 is on the upstream side in the main body airflow direction and the second blower 5 is on the downstream side of the main body airflow. ing. As for the 1st air blower 4 which is a both suction type, the motor 6 is cooled with the suction airflow of 1st air blower 4 itself. On the other hand, as for the 2nd air blower 5 which is a single suction type, the motor 6 is not cooled with the suction airflow of 2nd air blower 5 itself. Therefore, the motor 6 of the second blower 5 is exhausted by the exhaust of the first blower 4 by installing the first blower 4 on the upstream side of the main body airflow and installing the second blower 5 on the downstream side of the main body airflow. To be able to cool. Specifically, the motor 6 of the second blower 5 is disposed so as to face the blower outlet 13 of the first blower 4.

  When the second blower 5 is a double suction type, it is necessary to separate the air supply air path on the motor side of the second blower 5 from the first blower 4, and the number of parts increases and the internal structure becomes complicated, Manufacturing cost will increase. For this reason, the blower according to the first embodiment is configured such that the first blower 4 installed on the upstream side of the main body airflow is a double suction type, and the second blower 5 installed on the downstream side of the main body airflow is a single suction type. Yes. The blower inlet 17 of the second blower 5 and the blower outlet 13 of the first blower 4 are separated by a partition wall 15 provided in the outer casing 1. The partition 15 is provided with an opening 15 a through which the main body airflow passes at a position corresponding to the blower discharge port 13 of the first blower 4, and the blower suction ports 12, 14 of the first blower 4 are connected to the partition 15. Is isolated from the blower outlet 13. Since there is no blower suction port on the motor side of the second blower 5, it is not necessary to separate the motor side of the second blower 5 from the blower discharge port 13 of the first blower 4.

  The first blower 4 is installed in a state where the axial direction of the motor 6 of the first blower 4 is inclined with respect to the bottom surface 1 a of the outer casing 1 when viewed from the box suction port 2 of the outer casing 1. ing. The second blower 5 is installed so that the axial direction of the motor 6 of the first blower 4 and the axial direction of the motor 6 of the second blower 5 are orthogonal to each other when viewed from the box suction port 2. Yes. The fan casing 7 of the first blower 4 and the fan casing 7 of the second blower 5 are in contact with each other via a partition wall 15 at a position where the blower discharge port 13 of the first blower 4 is not blocked. Depending on the installation angle and the installation position of the first blower 4, the suction air passage of the second blower 5 may be reduced, which may adversely affect the blowing performance of the second blower 5. The installation angle and installation position of the first blower 4 are set so that a suction air passage can be secured. Specifically, the first air blower 4 and the first air blower 4 are arranged so that the fan casing 7 of the first air blower 4 does not protrude toward the air blower air inlet 17 of the second air blower 5 in a side view as viewed from the box air inlet 2. Two blowers 5 are installed.

  As shown in FIG. 3, the first blower 4 and the second blower 5 are the fans of the first blower 4 at a position where the second blower 5 does not block the blower outlet 13 of the first blower 4. The casing 7 and the fan casing 7 of the second blower 5 are in contact with each other, and the axial direction of the motor 6 of the first blower 4 intersects with the axial direction of the motor 6 of the second blower 5. Has been. Therefore, the first blower 4 and the second blower 5 partially overlap in a side view as viewed from the box suction port 2. Therefore, compared with the structure arranged so that the 1st air blower 4 and the 2nd air blower 5 may not overlap, the dimension of the width direction of the outer casing 1 can be shortened, and a ceiling projection area can be made small.

  Moreover, compared with the structure arrange | positioned without making the 1st air blower 4 and the 2nd air blower 5 contact, the length dimension of the direction which ties the box suction inlet 2 and the box discharge outlet 3 of the outer casing 1 is set. Can be shortened. Therefore, the blower according to Embodiment 1 can reduce the dimensions of the outer casing 1 both in the direction connecting the box suction port 2 and the box discharge port 3 and in the direction orthogonal thereto.

  In the above description, the axial direction of the motor 6 of the first blower 4 and the axial direction of the motor 6 of the second blower 5 are orthogonal in a side view. The angle in the side view between the direction and the axial direction of the motor 6 of the second blower 5 is not limited to a right angle. If the 1st blower 4 and the 2nd blower 5 do not block the blower discharge port 13 of the 1st blower 4 and the 2nd blower 5 can ensure the suction air course of the 2nd blower 5. The angle in a side view between the axial direction of the motor 6 of the first blower 4 and the axial direction of the motor 6 of the second blower 5 is not limited to a specific angle. In addition, both the first blower 4 and the second blower 5 are not installed to be inclined with respect to the bottom surface 1 a of the outer casing 1, but only one of them is inclined to the bottom surface 1 a of the outer casing 1. Good.

Embodiment 2. FIG.
4 and 5 are perspective views of the air blower according to Embodiment 2 of the present invention. In addition, the upper surface and side surfaces of the box are shown through so that the internal structure can be visually recognized. 4 and 5, the main body airflow is indicated by arrows. FIG. 6 is a side view of the air blower according to the second embodiment. The blower according to the second embodiment is different from the first embodiment in that the number of blowers installed in the outer casing 1 is three. The first blower 4 is a double suction type, and the second blower 5 and the third blower 16 are a single suction type.

  The blower inlet 17 of the second blower 5 and the blower outlet 13 of the first blower 4 are separated by a partition wall 15 provided in the outer casing 1. The partition 15 is provided with an opening 15 a through which the main body airflow passes at a position corresponding to the blower discharge port 13 of the first blower 4, and the blower suction ports 12, 14 of the first blower 4 are connected to the partition 15. Is isolated from the blower outlet 13. Since there is no blower suction port on the motor side of the second blower 5, it is not necessary to separate the motor side of the second blower 5 from the blower discharge port 13 of the first blower 4. The blower inlet 19 of the third blower 16 is isolated from the blower outlet 18 of the second blower 5 by a partition wall 21 provided in the outer casing 1. The partition wall 21 is provided with an opening 21 a through which the main body airflow passes at a position corresponding to the blower discharge port 18 of the second blower 5, and the blower suction port 17 of the second blower 4 is blown by the partition wall 21. It is isolated from the discharge port 18. Since there is no blower suction port on the motor side of the third blower 16, it is not necessary to separate the motor side of the third blower 16 from the blower discharge port 18 of the second blower 5.

  The first blower 4 is installed in a state where the axial direction of the motor 6 is perpendicular to the bottom surface 1 a of the outer casing 1 when viewed from the box suction port 2. The second blower 5 is a fan casing of the first blower 4 at a position where the axial direction of the motor 6 is parallel to the bottom surface 1a of the outer casing 1 and does not block the blower outlet 13 of the first blower 4. 7 and the fan casing 7 of the second blower 5 are placed in contact with each other via a partition wall 15. The third blower 16 has a fan casing of the second blower 5 at a position where the axial direction of the motor 6 is perpendicular to the bottom surface 1a of the outer casing 1 and does not block the blower outlet 18 of the second blower 5. 7 and the fan casing 7 of the third blower 16 are placed in contact with each other via a partition wall 21.

  In the blower according to Embodiment 2, the axial direction of the motor 6 of the first blower 4 and the axial direction of the motor 6 of the second blower 5 are orthogonal to each other, and the axial direction of the motor 6 of the second blower 5 is The axial direction of the motor 6 of the third blower 16 is orthogonal, the second blower 5 does not block the blower discharge port 13 of the first blower 4, and the third blower 16 is of the second blower 5. The blower discharge port 18 is configured not to be blocked. The axial direction of the motor 6 of the first blower 4 is orthogonal to the axial direction of the motor 6 of the second blower 5, and the axial direction of the motor 6 of the second blower 5 and the axis of the motor 6 of the third blower 16. By arranging the first blower 4, the second blower 5, and the third blower 16 so that the directions are orthogonal to each other, it is easy to secure a suction air passage for the second blower 5 and the third blower 16. Become. The height of the outer casing 1 is set so that the suction air passage of the second blower 5 and the suction air passage of the third blower 16 can be secured.

  As shown in FIG. 6, the first blower 4, the second blower 5, and the third blower 16 partially overlap in a side view as viewed from the box suction port 2. Therefore, when compared with a configuration in which the first blower 4, the second blower 5, and the third blower 16 are arranged so as not to overlap, the dimension in the width direction of the outer casing 1 can be shortened and the ceiling projected area can be reduced. it can.

  In the above description, the axial direction of the motor 6 of the first blower 4 and the axial direction of the motor 6 of the second blower 5 are orthogonal in a side view. The angle in the side view between the direction and the axial direction of the motor 6 of the second blower 5 is not limited to a right angle. If the 1st blower 4 and the 2nd blower 5 do not block the blower discharge port 13 of the 1st blower 4 and the 2nd blower 5 can ensure the suction air course of the 2nd blower 5. The angle in a side view between the axial direction of the motor 6 of the first blower 4 and the axial direction of the motor 6 of the second blower 5 is not limited to a specific angle. Moreover, although the axial direction of the motor 6 of the second blower 5 and the axial direction of the motor 6 of the third blower 16 were orthogonal to each other in a side view, the axial direction of the motor 6 of the second blower 5 and the third direction. The angle of the blower 16 in the side view with the axial direction of the motor 6 is not limited to a right angle. As long as the third blower 16 does not block the blower discharge port 18 of the second blower 5 and the suction air passage of the third blower 16 can be secured, the second blower 5 and the third blower 16 can be secured. The angle in a side view between the axial direction of the motor 6 of the second blower 5 and the axial direction of the motor 6 of the third blower 16 is not limited to a specific angle. In addition, the first blower 4, the second blower 5, and the third blower 16 are not all inclined and installed with respect to the bottom surface 1 a of the outer casing 1, but only a part of the first blower 4, the second blower 5 and the third blower 16 May be installed at an angle.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  DESCRIPTION OF SYMBOLS 1 Outer casing, 1a Bottom face, 2 Box body inlet, 3 Box body outlet, 4 1st fan, 5 2nd fan, 6 Motor, 7 Fan casing, 11 Impeller, 12, 14, 17, 19 Blower Suction port, 13, 18, 20 Blower discharge port, 15, 21 Partition, 15a, 21a opening, 16 Third blower.

Claims (2)

A main body box having a box body suction port and a box body discharge port on two opposing surfaces, and a blower device having a plurality of blowers installed inside the main body box body,
Among the plurality of blowers, the first blower installed in the uppermost stream of the main body airflow flowing into the main body box from the box suction port and out of the main body box from the box discharge port, Both suction type,
Among the plurality of blowers, a blower other than the first blower is a single suction type,
Among the plurality of fans, a partition that separates the suction side of a fan other than the first fan and the exhaust side of the first fan,
The plurality of blowers include a fan casing of a blower that is an upstream side of the main body airflow at a position where the blower that is the downstream side of the main body airflow does not block the blower outlet of the blower that is the upstream side of the main body airflow. A state where the fan casing of the blower on the downstream side of the main body airflow is in contact with the partition wall, and the axial direction of the motor of the blower on the upstream side of the main body airflow and the blower on the downstream side of the main body airflow A blower characterized in that it is installed in a state where it intersects with the axial direction of the motor.   The blower according to claim 1, wherein an axial direction of a motor of a blower that is upstream of the main body airflow is orthogonal to an axial direction of a motor that is downstream of the main body airflow.

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