JP5062305B2 - Duct fan - Google Patents

Description

  The present invention relates to a structure of a duct fan in which two blowers are installed in a space such as the back of a ceiling of a building and ventilate by exhausting indoor air from the room to the outside through a duct.

  The present invention also relates to the structure of a duct fan that improves the suction characteristics of the blower and increases the blowing efficiency.

  As shown in FIG. 5, a conventional duct fan 101 is a main body casing, which is composed of two pairs of side plates 102 facing each other and an upper plate and a lower plate, and one of the side plates 102 is connected to an absorption duct 103 for suction. A port 104 is provided, and the other side is provided with a discharge port 106 for connecting a discharge duct 105. A partition plate 108 having an opening 107 separates the side plate 102 on the suction port 104 side and the side plate 102 on the discharge port 106 side of the main body casing 101, and the partition plate 108 and the partition plate 108 A plurality of blowers 111 whose positions are determined by aligning the outlet 110 of the partition plate 108 with the opening 107 of the partition plate 108 are arranged in parallel with the position regulating member 109 provided on the side plate 102 side of the suction port 104 side. It is fixed to. The plurality of blowers 111 can be removed sequentially from the front by removing one side plate 102 of the main casing 101 and removing the position regulating member 109 (see, for example, Patent Document 1).

No. 4-44982

  In such a conventional duct fan, the plurality of fans 111 can be sequentially removed from the front by removing one side plate 102 of the main casing 101 and removing the position regulating member 109. Since the plurality of blowers 111 are arranged in parallel between the plate 108 and the position restricting member 109 provided on the side plate 102 on the suction port 104 side of the partition plate 108, the side plate 102 Even when it is necessary to replace and inspect only the second blower far from the maintenance opening provided on the side, it is necessary to remove the blower sequentially from the front, and both blowers must be removed. There is a problem that it takes time and labor.

  Further, since the main casing 101 has a small space for mounting on the ceiling, it is difficult to install and maintain the main casing 101, so that the main casing 101 is required to be compact.

  In addition, there is a demand for a duct fan that incorporates two suction-type blowers in a compact manner and has improved air blowing efficiency.

  On the other hand, there is a demand for a duct fan in which one double-suction blower and one single-suction blower are housed in a compact manner and the air blowing efficiency is improved.

  Therefore, the present invention is to solve such a conventional problem, and an object of the present invention is to provide a duct fan having a compact structure in which two fans can be taken out individually.

  It is another object of the present invention to provide a duct fan which has two suction blowers in a compact manner and which has improved air blowing efficiency.

  On the other hand, an object is to provide a duct fan that has one double-suction fan and one single-suction fan in a compact manner and has improved blowing efficiency.

  The invention according to claim 1 is a box-shaped housing provided on the surface where the suction port and the discharge port are opposed to each other, a ventilation path formed in the housing from the suction port to the discharge port, and this ventilation A fan-type fan provided with a fan motor unit and a fan casing provided in the road, and a fan casing side plate having a fan inlet on the side opposite to the motor of this both-intake fan, projecting on the inlet side of the casing Since the air current can be attracted in the direction of the impeller central axis of the fan suction port, the fan characteristics can be ensured in an optimum operating state.

  As is apparent from the above description, according to the present invention, the air current can be attracted in the direction of the impeller central axis of the fan suction port, so that the fan characteristics can be ensured in an optimum operating state.

The side view which shows the installation state of the reference example 1 of this invention Plan sectional drawing of the reference example 1 of this invention Plan sectional drawing of the reference example 2 of this invention Plan sectional view of Reference Example 3 of the present invention Plan view of a conventional duct fan Plan sectional drawing of Example 1 of this invention Plan sectional drawing of Example 2 of this invention Plan sectional drawing of Example 3 of this invention Plan sectional drawing of Example 4 of this invention Thermal insulation attachment situation diagram of Example 4 of the present invention

  The first embodiment of the present invention includes a box-shaped housing provided on a surface where the suction port and the discharge port face each other, and a ventilation path formed in the housing so as to reach the discharge port from the suction port. A suction fan side of the housing of the side plate of the fan casing having a fan suction port on the side opposite to the motor of the both suction type blower and a fan motor unit and a fan casing provided in the ventilation path. In addition, a current-transforming plate formed in a protruding shape is provided. Thereby, since an air current can be attracted in the direction of the impeller central axis of the fan suction port, the fan characteristics can be ensured in an optimum operating state.

  Also, a box-shaped housing provided on the surface where the suction port and the discharge port face each other, a ventilation path formed in the casing from the suction port to the discharge port, and a fan provided in the ventilation path A single-suction fan provided with a motor unit and a fan casing, and a current-flow plate formed in a protruding shape on the suction port side of the housing of the fan casing side plate having a fan suction port of the single-suction fan It is characterized by this. Thereby, even if both suction type fans are arranged at a position where the configuration is compact, air current can be attracted in the direction of the impeller central axis of the fan suction port, so that the fan characteristics can be ensured in an optimum operating state.

  Further, the current transformer plate is provided with a sound absorbing material, which can induce airflow in the direction of the impeller central axis of the fan suction port and reduce noise generated from the fan suction port.

  Further, the current transformer plate is constituted by a sound absorbing material, and a current absorbing effect and a sound absorbing effect can be performed by the sound absorbing material alone.

  Moreover, the said current transformation board is formed integrally with the sound-absorbing material provided in the upstream of the scroll wall of an air blower, and attachment man-hour becomes easy.

  Embodiments of the present invention will be described below with reference to the drawings.

(Reference Example 1)
Reference Example 1 will be described with reference to FIGS. 1 is a side view showing the installation state of Reference Example 1, and FIG. 2 is a plan sectional view of Reference Example 1. FIG. As shown in FIG. 2, a first blower 6 and a second blower 7 having a suction adapter 3 at the suction port 2 of the housing 1 and a discharge adapter 5 at the discharge port 4 are built in. The inside of the housing 1 has a partition wall 10 that divides a flow path that flows linearly from the suction port 2 to the discharge port 4 into a first ventilation path 8 and a second ventilation path 9. Each air passage is provided with a fan motor unit 14 having an impeller 11, a motor 12 and an orifice 13, and a fan casing 15. The second blower 7 disposed in the second ventilation path 9 includes a side plate 17 and a partition wall 10 that attach a maintenance plate 16 that covers the maintenance opening 61 in the vicinity of the suction port 2 of the housing 1. The fan discharge port 18 of the second blower 7 is disposed toward the discharge port 4 of the housing 1. The fan discharge port plate 19 divides the second ventilation path 9 between the discharge port 4 and the suction port 2 of the housing 1 and forms a chamber portion 20 on the discharge port 4 side.

  On the other hand, the first blower 6 disposed in the first ventilation path 8 is provided between the anti-maintenance side plate 21 opposite to the side plate 17 to which the maintenance plate 16 of the housing 1 is attached and the partition wall 10. The fan discharge port 18 of one blower 6 is attached to the discharge side plate 22 toward the discharge port 4 of the housing 1. The partition wall 10 has an opening 23 larger than the fan casing 15 of the first blower 6, and a partition plate 24 that covers the opening 23 is attached with screws. Further, the arrangement relationship between the first blower 6 and the second blower 7 is such that the fan casing end 25 of the first blower 6 on the suction port 2 side of the housing 1 and the fan discharge port plate of the second blower 7. 19 is configured not to overlap.

  In the above configuration, when the duct fan is operated, the first blower 6 and the second blower 7 built in the housing 1 are operated, and the air in the room 26 passes through the suction adapter 3 connected to the suction side duct 27 and passes through the housing. It is exhausted to the outdoor 29 through a discharge duct 28 connected to the discharge adapter 5 through the body 1.

  Here, when removing the second blower 7 during maintenance of the duct fan, the maintenance plate 16 can be removed and removed. When the first blower 6 in the first ventilation path 8 is removed, the maintenance plate 16 is first removed, then the partition plate 24 in the partition wall 10 is removed, and the opening 23 and the maintenance opening. Remove from 61 to the outside of the housing 1. At this time, the first blower 6 and the second blower 7 can be taken out separately because the first blower 6 and the second blower 7 do not interfere with each other when the first blower 6 is removed. This is because the position of the fan casing 15 is shifted, so that the first blower 6 can be removed from the maintenance opening 61 without removing the second blower 7.

  Moreover, when attaching, it can carry out by the reverse operation | work.

  The arrangement of the second blower 7 may not be in the vicinity of the suction port 2 of the housing 1.

  Further, the partition wall 10 may not be connected to the suction port 2.

(Reference Example 2)
Reference Example 2 is different from Reference Example 1 in that when only the fan motor unit 14 of the first blower 6 is taken out, it is arranged at a position where it is not interfered with the second blower 7, and reaches from the suction port 2 to the discharge port 4. The distance of the flow path that flows linearly is shortened, that is, the length of the housing 1 is made compact.

  FIG. 3 is a plan sectional view of Reference Example 2. As shown in FIG. 3, the arrangement of the first blower 6 and the second blower 7 is such that the fan casing end 25 of the first blower 6 and the orifice end of the fan motor unit 14 on the suction port 2 side of the housing 1. Between the part 31, the 2nd air blower 7 is arrange | positioned in the position where the fan discharge port plate 19 overlapped.

  Here, when only the fan motor unit 14 of the first blower 6 in the first ventilation path 8 is removed during the maintenance of the duct fan, the maintenance plate 16 is first removed, and then the partition in the partition wall 10 is separated. The plate 24 is removed and removed from the opening 23 and the maintenance opening 61 to the outside of the housing 1. At this time, the first blower 6 and the second blower 7 can be taken out separately because the first blower 6 and the second blower 7 do not interfere with each other when the first blower 6 is removed. This is because the position of the fan casing 15 is shifted, so that the first blower 6 can be detached from the maintenance opening without removing the second blower 7.

(Reference Example 3)
The third reference example has a configuration in which the width of the channel that flows linearly from the suction port 2 to the discharge port 4 is narrower than that of the reference example 1, that is, the width of the housing 1 is made compact. . FIG. 4 is a plan sectional view of Reference Example 3.

  As shown in FIG. 4, the fan motor unit 14 of the first blower 6 on the first ventilation path 8 side or the first blower 6 is removed from the maintenance opening 61 without removing the second blower 7. At this time, the first and second blowers are arranged such that the fan casing 15 of the second blower 7 overlaps the scroll width 42 sandwiched between both fan casing side plates 41 of the fan casing 15 of the first blower 6. The configuration is as follows. For this reason, the first flow path 8 and the second flow path 9 are separated from the first blower 6 in the linear flow path from the suction port 2 to the discharge port 4. The first partition 44 located on the second ventilation path 9 side from the center line 43 of the suction port and the discharge port, and the first ventilation from the center line 43 of the housing 1 facing the second blower 7. The second partition 45 disposed on the side of the road 8 is divided by a step partition 46 connecting the first and second partitions. Due to this partition structure, even if the distance between the first and second blowers is narrowed, the flow of wind can be made smooth to reduce the air path resistance, and the air blowing characteristics can be ensured. Thereby, the width | variety of the housing | casing 1 can be made narrow and compact.

  Here, when removing the first blower 6 in the first ventilation path 8 during maintenance of the duct fan, first, the maintenance plate 16 is removed, and then the partition plate 24 in the partition wall 10 is removed. The opening 23 and the maintenance opening 61 can be removed from the housing 1.

Example 1
The first embodiment is different from the third embodiment in that a current transformation plate 56 that changes the flow of the airflow at the fan suction port 51 is provided. Therefore, the same reference numerals are used for the same parts as those of the reference example 3, and the description thereof is omitted. The blower in Reference Example 3 includes a double suction blower and a single suction blower. In Example 1, the blower is a double suction blower. FIG. 6 is a plan sectional view of Example 1 of the present invention.

  As shown in FIG. 6, in the second ventilation path 9, the scroll wall 54 is provided in the ventilation suction path 53 of the fan casing side plate 52 having the fan suction port 51 on the opposite motor side of the second suction fan 50. It is the structure which provided the rectangular-shaped current transformation board 56 which protrudes from the edge part 55 by the side of the fan inlet 51 of this, and interrupts | blocks a flow path.

  In this configuration, the air flowing in from the suction port 2 hits the scroll wall 54 and the rectangular current transformer plate 56, so that the air flows over the current transformer plate 56 and flows in the direction of the impeller center shaft 57 of the fan suction port 51. Therefore, the fan characteristics can be ensured in an optimum operating state. This is because when the wall surface flow along the fan casing side plate 52 flows in from the fan suction port 51, the incident angle of the suction airflow becomes smaller with respect to the fan impeller, and the fan efficiency is reduced. Therefore, if the flow of the wind is changed so as to suppress the flow of the wall surface flow and flow in the direction of the impeller central axis 57 of the fan suction port 51, the airflow can be induced in the direction of the impeller central axis of the fan suction port 51. As a result, fan efficiency can be increased.

(Example 2)
The second embodiment is different from the first embodiment in that the number of both suction blowers 50 is changed from two to one, and the other configurations and functions are the same as those of the first embodiment. Therefore, the same reference numerals are used for the same portions as those in the first embodiment, and description thereof is omitted. FIG. 7 is a plan sectional view of Example 2 of the present invention.

  As shown in FIG. 7, the air suction passage 53 of the fan casing side plate 52 having the fan suction port 51 on the side opposite to the motor of the both suction type blower 50 protrudes from the end portion 55 of the scroll wall 54 on the fan suction port 51 side. It is set as the structure which provided the rectangular current plate 56 which interrupts | blocks a flow path. That is, since the current transformation plate 56 formed in a protruding shape prevents the wall surface flow along the fan casing side plate 52 and induces the suction flow in the direction of the impeller central shaft 57 of the fan suction port 51, the fan characteristics are optimized. It can be secured in the operating state. Conventionally, the housing 1 can be made compact with respect to the suction port 60 matched with the dimension of the suction side duct 27. That is, the conventional suction flow hits the scroll wall 54 and flows in the direction of the impeller central shaft 57 of the fan suction port 51 beyond the scroll wall 54. If the width in the direction perpendicular to the flow path of the housing 1 is reduced in this state, the position of the scroll wall 54 is lowered with respect to the suction port 60, and the suction flow does not hit the scroll wall 54. Look for it. Therefore, the fan efficiency is improved by providing the current changing plate 56 and changing the flow of the wind so as to flow in the direction of the impeller central shaft 57 of the fan suction port 51.

(Example 3)
The third embodiment is different from the second embodiment in that both suction fans 50 are changed to a single suction fan 71, and the other configurations and functions are the same as those in the second embodiment. Therefore, the same parts as those in the second embodiment are denoted by the same reference numerals, and the description thereof is omitted. FIG. 8 is a plan sectional view of Example 3 of the present invention.

  As shown in FIG. 8, a fan suction side 53 of a fan casing side plate 52 having a fan suction port 51 on the side opposite to the motor of the single suction blower 71 protrudes from an end portion 55 of the scroll wall 54 on the fan suction port 51 side. It is set as the structure which provided the rectangular current plate 56 which interrupts | blocks a flow path. That is, the current plate 56 formed in a protruding shape prevents the wall surface flow along the fan casing side plate 52 and induces the suction flow in the direction of the impeller central shaft 57 of the fan suction port 51, so that the fan characteristics Can be ensured in an optimum operating state.

Example 4
The fourth embodiment is different from the third embodiment in that the sound-absorbing material 72 is provided on the current-transforming plate 56 and the sound-absorbing material 72 is used in place of the current-transforming plate 56. Same as Example 3. Therefore, the same reference numerals are used for the same parts as those in the third embodiment, and description thereof is omitted. FIG. 9 is a plan cross-sectional view of Embodiment 7 of the present invention, and FIG.

  As shown in FIG. 9, a sound absorbing material 72 is provided on a rectangular current plate 56. As a result, the suction noise from the fan can be absorbed by the sound absorbing material 72. Further, as shown in FIG. 10, the scroll wall 54 is provided with a sound absorbing material A73 in order to reduce the suction noise from the fan, and the sound absorbing material A73 attached to the current transformer plate 56 is integrated with the scroll wall 54. To do. As a result, simplification at the production stage and reduction of man-hours at the assembly stage can be achieved.

  The present invention can also be applied to exhaust.

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Suction port 4 Discharge port 6 1st air blower 7 2nd air blower 8 1st ventilation path 9 2nd ventilation path 10 Partition partition 14 Fan motor unit 15 Fan casing 16 Maintenance plate 17 Side plate 24 Partition Plate 25 Fan casing end portion 31 Orifice end portion 41 Fan casing side plate 42 Scroll width 43 Center line 44 First partition 45 Second partition 46 Step partition 50 Double suction fan 51 Fan suction port 52 Fan casing side plate 53 Ventilation suction passage 54 Scroll Wall 55 End 56 Current transformer plate 57 Impeller central shaft 60 Suction port 61 Maintenance opening
71 Single suction blower 72 Sound absorbing material 73 Sound absorbing material A

Claims (5)

A box-shaped housing having suction and discharge ports facing each other;
A ventilation path formed in the housing from the suction port to the discharge port;
A fan motor unit provided in the ventilation path and a double suction fan provided with a fan casing;
A duct fan, characterized in that a current plate formed in a protruding shape is provided on a suction port side of the housing of a side plate of a fan casing having a fan suction port on the opposite motor side of the both suction type fans. A box-shaped housing having suction and discharge ports facing each other;
A ventilation path formed in the housing from the suction port to the discharge port;
A single-suction blower provided with a fan motor unit and a fan casing provided in the ventilation path;
A duct fan, characterized in that a current-transforming plate formed in a protruding shape is provided on a suction port side of the housing of a fan casing side plate having a fan suction port of the single suction type blower. The duct fan according to claim 1, wherein a sound absorbing material is provided on the current transformer plate. The duct fan according to claim 1, wherein the current transformer plate is made of a sound absorbing material. The duct fan according to any one of claims 1 to 4, wherein the current transformer plate is formed integrally with a sound absorbing material provided on an upstream side of a scroll wall of a blower.

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