JP7108829B2 - Air blower, air supply fan - Google Patents

Description

The present invention relates to a blower and an air supply fan provided with the blower.

Conventionally, it is known that a filter can be easily attached and detached during maintenance of an air supply fan (Patent Document 1).

The air supply fan will be described below with reference to the drawings.

As shown in FIGS. 10 and 11, the air supply fan has a first opening 102 and a second opening 103 located on one surface of the housing 101 facing a direction perpendicular to the thickness direction of the housing 101, and is located inside the housing 101. , has an air flow path 104 that communicates the first opening 102 and the second opening 103, and has a blower 105 that is positioned in the air flow path 104 and sucks air through the first opening 102 and blows it out from the second opening 103. , a block-shaped first filter 106 located downstream of the first opening 102 in the air flow path 104 . In addition, an airflow guide 107 is mounted movably or detachably in front of one surface of the housing, and guides the direction of the flow of air blown out from the second opening 103 . It has a projecting portion 109 for preventing the airflow guide 107 from falling off, and has a structure in which the filter can be attached and detached by removing the airflow guide 107 .

JP 2019-18204 A

Such a conventional air blower has a structure for generating straight airflow in the blowing direction from the blowing portion (second opening). For this reason, when an expanded air passage is arranged immediately after the blow-out portion and a louver (air flow guide) is arranged downstream thereof, the air flow blown out from the louver is uneven, and there is a problem that a uniform air flow cannot be provided. . In addition, there was a problem that the main flow of the air current with a high wind velocity hits the louver and the partial pressure loss increases.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a blower and an air-supply fan capable of obtaining a favorable blowing airflow in accordance with the structure of the downstream side.

In order to achieve this object, the air supply fan according to the present invention includes a suction side plate having a suction opening, an opposing side plate provided parallel to the suction side plate and facing the suction side plate, and connecting the suction side plate and the opposing side plate A scroll having a spiral shape that gradually expands the flow passage cross-sectional area in the outer peripheral direction from the tongue portion downstream, a blowout opening formed by the suction side plate, the opposing side plate and the scroll, and air from the suction opening to the blowout opening. and a fan motor unit that guides the flow path cross section at the blowout opening to the suction side plate side of the dividing plane that divides the thickness direction from the suction side plate to the opposing side plate and is the outer peripheral side end of the spiral shape. and an opposing outer peripheral end portion that is on the side of the opposing side plate relative to the dividing plane and is an outer peripheral side end portion of the spiral shape, and either one of the suction outer peripheral end portion and the opposing outer peripheral end portion is connected to the other outer peripheral end portion. The one outer peripheral end is positioned outer peripheral than the outer peripheral end, the one outer peripheral end is positioned outer peripheral than the blowing vertical tangent line perpendicular to the blowing plane to which the blowing opening belongs, the one outer peripheral end being the tangent to the scroll, and the other outer peripheral end The outer peripheral end of the is located on the inner peripheral side of the blowing vertical tangent line,
The scroll includes a plane plate connecting an intersection point where the blowing vertical tangent line intersects with the scroll and the one outer peripheral end portion located on the outer peripheral side, and a flat plate connecting the intersection point and the other outer peripheral end located on the inner peripheral side and a curved plate that connects the air blower to achieve the intended purpose.

ADVANTAGE OF THE INVENTION According to this invention, the air blower and air supply fan which can obtain the favorable blowing air flow match|combined with the downstream structure can be provided.

FIG. 1 is a perspective cross-sectional view of an air supply fan according to the present invention. FIG. 2 is a schematic configuration diagram showing detachability of the air supply fan according to the present invention. FIG. 3 is an exploded view showing the fan unit. FIG. 4 is an exploded view showing the louver portion. FIG. 5 is a schematic configuration diagram showing a ceiling installation state. 6A and 6B are top and side views showing the shape of the fan casing. FIG. 7A is a schematic diagram showing the shape of the blow-out opening. FIG. 7B is a schematic diagram showing the shape of the blow-out opening. FIG. 8 is a cross-sectional view of an air supply fan equipped with a blower according to the present invention. FIG. 9A is a schematic diagram showing another shape of the blow-out opening. FIG. 9B is a schematic diagram showing another shape of the blow-out opening. FIG. 10 is a structural diagram of a prior art filter dust remover. FIG. 11 is a structural diagram of a prior art filter dust removing device.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for better understanding of the present invention. It should be noted that the following embodiment is an example that embodies the present invention, and does not limit the technical scope of the present invention. In addition, throughout the drawings, the same parts are denoted by the same reference numerals, and the second and subsequent explanations are omitted.

(Embodiment 1)
First, a schematic configuration of an air supply fan 90 according to the present invention will be described with reference to FIGS. 1 to 4. FIG.

The air supply fan 90 is installed, for example, on the indoor ceiling of a building.

The air supply fan 90 includes a housing 1, a filter section 2, a fan unit 3, and a louver section 4, as shown in FIGS.

The housing 1 is hollow and has a flat rectangular plate shape. The housing 1 includes a side surface 60, an opposite side surface 61 facing the side surface 60, a top surface 62 adjacent to the side surface 60 and the opposite side surface 61, a bottom surface 63 facing the top surface 62, the side surface 60, the top surface 62, and a back surface 64 adjacent to the bottom surface 63 and a front surface 65 facing the back surface 64 . Further, the housing 1 includes a rod-shaped fixing portion 29 extending from the top surface 62 to the bottom surface 63 on the opposite side surface 61 .

The front face 65 is a rectangular opening, and the direction connecting the side face 60 and the opposite side face 61 is taken as the longitudinal direction.

The side surface 60, the reverse side surface 61, the top surface 62, the bottom surface 63, and the back surface 64 are each rectangular. In the side surface 60 and the opposite side surface 61, the direction connecting the front surface 65 and the back surface 64 is taken as the longitudinal direction. Side 60 is provided with an air inlet opening 70 . Moreover, the side surface 60 and the opposite side surface 61 are provided with hanging portions 28 .

The hanging portion 28 protrudes outward from the housing 1 from the side surface 60 and the opposite side surface 61 . The hanging part 28 is engaged with a wire or the like connected to the ceiling, thereby making it possible to hang the housing 1 from the ceiling. The hanging part 28 can attach the housing 1 with both the top surface 62 and the bottom surface 63 facing the ceiling.

The filter section 2 includes a filter 5 , a filter holding section 6 and a filter frame 7 .

The filter 5 has, for example, a rectangular shape, and separates and accumulates dust contained in the air passing through the filter 5 . The top surface of the filter 5 faces the top surface 62 of the housing 1 and the bottom surface thereof faces the bottom surface 63 of the housing 1 . The filter 5 has an upstream surface located on the upstream side and a downstream surface located on the downstream side with reference to the flow of air passing through the filter 5 in the state of being placed in the air supply fan. . The filter 5 has a grip portion 8 .

The gripping portions 8 are provided on the side surface facing the front surface 65 and the side surface facing the back surface 64 of the filter 5 . The grip part 8 is, for example, a piece of cloth connected to the filter 5 and is used when pulling out the filter 5 from the housing 1 .

The filter holding portion 6 is a plate-like rectangular member having the same size as the top surface and the bottom surface of the filter 5 . The filter holding portion 6 is installed at two places, a top surface 62 inside the housing 1 and a bottom surface 63 inside the housing 1 . The two filter holding portions 6 each have a plane parallel to the top surface 62, and two rails 9 are provided on each plane with the same interval as the thickness from the upstream surface to the downstream surface of the filter 5. Prepare.

The rail 9 restricts the movement of the filter 5 inside the housing 1 in the direction connecting the rear surface 64 and the front surface 65 at the top surface and the bottom surface of the filter 5 .

The filter frame 7 is parallel to the front face 65 and has a plate shape. The filter frame 7 has an insertion opening 10 as an opening for inserting the filter 5 in the center, and a filter cover 11 covering the insertion opening 10 .

The filter cover 11 is parallel to the front face 65 and has a plate shape. When the air supply fan is in operation, installing the filter cover 11 can prevent air from flowing out from the gap. Filter cover 11 also restrains movement of filter 5 in a direction perpendicular to front face 65 .

The fan unit 3 functions as an air blower, and includes a fan casing 12, a fan motor unit 31, a front fixing plate 30, and a controller 16, as shown in FIG.

The fan casing 12 has a hollow flat plate shape with a predetermined thickness, and includes a suction side plate 32, an opposing side plate 13, a scroll 33, and a blowout opening 72, as shown in FIGS.

The suction side plate 32 is a substantially circular flat plate, and is provided facing the top surface 62 of the fan unit 3 with a certain distance therebetween. The suction side plate 32 has a suction opening 71 near the center of the flat plate.

The suction opening 71 is provided as a circular opening on the side surface of the suction side plate 32 , in other words, the scroll 33 , and faces the top surface 62 when the fan unit 3 is fixed inside the housing 1 .

The opposing side plate 13 is installed parallel to the bottom surface 63 side of the fan casing 12 , that is, the opposing surface of the suction side plate 32 as a base for arranging the motor 14 at a predetermined position.

The scroll 33 connects the suction side plate 32 and the opposing side plate 13 . The scroll 33 has a tongue portion 76 in the vicinity of one end portion 74, and extends downstream from the tongue portion 76, i.e., toward an outer peripheral side end portion 75, so that a flow passage cross-sectional area formed between the below-described impeller 15 extends toward the outer periphery. It has a spiral shape that gradually expands in the direction. In addition, since the one end portion 74 is closer to the suction opening 71 located substantially in the center than the outer peripheral end portion 75, it can be rephrased as an inner peripheral end portion. Also, since the one end 74 is close to the tongue 76 , it can be rephrased as the tongue-side end 48 .

The blowout opening 72 is provided as an opening in the vicinity of the outer peripheral end 75 of the scroll 33 and faces the front surface 65 when the fan unit 3 is fixed inside the housing 1 . The blowout opening 72 is formed surrounded by the suction side plate 32 , the opposing side plate 13 , one end portion 74 of the scroll 33 , and the outer peripheral side end portion 75 . The details of the shape of the blow-out opening 72 will be described later.

The fan motor unit 31 is a driving section for guiding air from the suction opening 71 to the blowing opening 72, and includes a motor 14 and an impeller 15. As shown in FIG.

The motor 14 has a rotating shaft 17 that rotates when energized, and the rotating shaft 17 protrudes toward the top surface 62 from the bottom surface 63 side of the fan casing 12 toward the internal space. The motor 14 is installed on the bottom surface 63 side of the opposing side plate 13 .

The impeller 15 is connected to the rotating shaft 17 in the inner space of the fan casing 12 and blows air by rotating the rotating shaft 17 . The impeller 15 is desirably a low-noise, high-static-pressure sirocco fan.

Next, the cross-sectional shape of the blowout opening 72 will be described in detail with reference to FIGS. 6, 7A, 7B and 8. FIG. 7A and 7B are schematic diagrams showing the shape of the blow-out opening 72. FIG. As shown in FIGS. 7A and 7B, two types of blowout openings 72 are shown. Also, the shape of the blowout opening 72 of the fan casing 12 shown in FIG. 6 corresponds to FIG. 7A.

The channel cross section at the blowout opening 72 includes a dividing plane 41, a suction outer peripheral end portion 42, and an opposing outer peripheral end portion 43, as shown in FIGS. 7A and 7B.

The dividing plane 41 is parallel to the suction side plate 32 and the opposing side plate 13 and is a plane that virtually divides the thickness direction from the suction side plate 32 to the opposing side plate 13 . In a region on the dividing plane 41 that connects an end portion 77 of the opposing outer peripheral end portion 43 on the side of the suction side plate 32 and an end portion 78 of the outer peripheral suction end portion 42 on the side of the opposing side plate 13, FIG. A split plate 79 is arranged as indicated by the solid line in FIG. 7B.

The dividing plate 79 has a substantially triangular shape including one curved side. In other words, the edge on the side of the blowout opening 72 is the side indicated by the above-described solid straight line, and the upstream edge thereof has a substantially triangular shape with an intersection point 45 to be described later as the vertex.

The suction outer peripheral end portion 42 is positioned closer to the suction side plate 32 than the dividing plane 41 and at the outer peripheral side end portion 75 of the scroll 33 .

The opposing outer peripheral end portion 43 is positioned closer to the opposing side plate 13 than the dividing plane 41 and at an outer peripheral end portion 75 of the scroll 33 .

One of the suction outer peripheral end portion 42 and the opposing outer peripheral end portion 43 is located on the outer peripheral side of the blowing vertical tangent line 44 , and the other is located on the inner side of the blowing vertical tangent line 44 . Here, the blowing vertical tangent line 44 is a tangent line to the outer peripheral curved surface of the scroll 33 and perpendicularly crosses the blowing plane 34 to which the blowing opening 72 belongs. Although there are two such tangent lines on the scroll 33 , the tangent line on the downstream side or the tangent line on the outer peripheral side end portion 75 side can be used as the blowing vertical tangent line 44 . A point of intersection 45 is defined as an intersection point where the blowout vertical tangent line 44 intersects the scroll 33 .

In FIG. 7A, the opposing outer peripheral end portion 43 is located on the outer peripheral side of the blowing vertical tangent line 44, and in FIG. 7B, the suction outer peripheral end portion 42 is located on the outer peripheral side of the blowing vertical tangent line 44. That is, in the case of FIG. 7A, the blown airflow on the suction side plate 32 side of the blowing opening 72 is blown toward the tongue portion 76 side, and the blown airflow on the opposite side plate 13 side is blown toward the outer peripheral side. In FIG. 7B, the airflow on the suction side plate 32 side of the blowing opening 72 blows out in the direction of the outer circumference, and the airflow on the opposite side plate 13 side blows out in the direction of the tongue portion 76 side. The opposite is true. Consequently, Figures 7A and 7B project a similar longitudinally expanding airflow.

The division structure of the suction outer peripheral end portion 42 and the opposing outer peripheral end portion 43 by the dividing plane 41 divides the blowing airflow into the airflow blowing from the suction outer peripheral end portion 42 and the airflow blowing from the opposing outer peripheral end portion 43 in two directions. has the effect of widening the width of the blown airflow. Therefore, the outer peripheral end portion located on the outer peripheral side of the blowing vertical tangent line 44 may be either the suction outer peripheral end portion 42 or the opposing outer peripheral end portion 43 . However, in order to use a mold for manufacturing, FIG. 7A, in which the opposite outer peripheral end portion 43 is located on the outer peripheral side of the blowing vertical tangent line 44, is preferable considering that the ejection direction is one direction.

The scroll 33 further includes a plane plate 46 , a curved plate 47 , and an inner Coanda curved surface 50 .

The plane plate 46 is a plane plate having a linear shape when viewed from above, connecting the vicinity of the intersection 45 and an outer peripheral edge located on the outer peripheral side (for example, the opposite outer peripheral edge 43 in FIG. 7A). The plane plate 46 includes an outer peripheral side Coanda curved surface 49 that gently expands toward the downstream near the blowout opening 72 and intersects with the blowout plane 34 .

The curved surface plate 47 has a curved shape that connects the vicinity of the intersection 45 and an outer peripheral end located on the inner peripheral side (for example, the suction outer peripheral end 42 in FIG. 7A), and has a curved shape that accommodates the suction opening 71 on the inner surface when viewed from above. It is a curved board. The curved surface plate 47 has a curved surface that follows the curved shape of the scroll 33 from the upstream end of the intersection 45 to the outer peripheral end on the inner peripheral side.

The inner Coanda curved surface 50 is provided in the vicinity of the tongue portion 76 , that is, in the vicinity of the tongue portion side end portion 48 . The inner peripheral Coanda curved surface 50 is a curved surface that gently expands the blowout opening 72 toward the downstream in the vicinity of the blowout opening 72 , and the downstream end intersects the blowout plane 34 .

The outer Coanda curved surface 49 and the inner Coanda curved surface 50 uniformly expand the blown airflow to the left and right by causing the blown airflow to flow along the blowout plane 34 due to the Coanda effect. The Coanda effect is a phenomenon in which viscous fluids are attracted closer to walls.

As for the air volume distribution of the outlet of the sirocco fan, the maximum air volume is at the opposite side plate 13 side of the outer peripheral end, and the air volume decreases from the outer peripheral end toward the tongue. Therefore, in order to equalize the ratio of the airflow blown in the longitudinal direction, the area of the lower outlet of the opposing side plate 13 is changed from the dividing plane 41 . Specifically, the dividing plane 41 includes a position where the distance from the suction side plate 32 and the opposing side plate 13 is equal, and is positioned on the opposing side plate 13 side, so that the dividing plane 41 is located on the opposing side plate 13 side and the suction side plate 32 . The air volume on the side can be made uniform. “Located on the opposite side plate 13 side” refers to a position where the distance between the dividing plane 41 and the suction side plate 32 is longer than the distance between the dividing plane 41 and the opposite side plate 13 .

The schematic configuration of the air supply fan 90 according to the present invention will be described again with reference to FIGS. 1 to 4. FIG.

The front fixing plate 30 has an L shape when viewed from the top, and one side surface of the L shape is provided at a position of the fan unit 3 facing the front surface 65 of the housing 1 . Also, the other side surface adjacent to the one side surface of the L-shape is arranged parallel to the opposite side surface 61 of the housing 1 . The front fixed plate 30 has an opening on one side surface to which the blowout opening 72 of the fan casing 12 described above is connected. One side of the L-shape is arranged parallel to the filter frame 7 and the filter cover 11 and forms the same plane 66 .

In other words, the same surface 66 is composed of the filter frame 7, the filter cover 11, and one side surface of the L shape. Strictly speaking, the same plane 66 shown in the drawing has unevenness. Since it can be regarded as the same surface, it is defined as the same surface. In other words, the same plane 66 does not need to be an exact plane (flat plane), and may be a plane that is the same in the working direction. The blowout plane 34 to which the blowout openings 72 belong can also be the same plane 66 .

The control unit 16 has a plate shape and accommodates a control board for controlling the motor 14 inside. The control unit 16 is fixed to the other side surface of the fan casing 12 and controls rotation of the rotating shaft 17 . The control unit 16 is detachable from the housing 1 together with the fan unit 3 . However, the control section 16 may be provided separately from the fan unit 3 , that is, the fan unit 3 and the control section 16 may be individually and independently detachable from the housing 1 .

The louver portion 4 includes an adjuster 19 and a louver 20, as shown in FIG.

The adjuster 19 has an outer peripheral wall 21 and a contact surface 22 .

The outer peripheral wall 21 has a hollow rectangular parallelepiped shape. The outer peripheral wall 21 is attached to the housing 1 through the front surface 65 of the housing 1, and the outer peripheral surface of the outer peripheral wall 21 is inside the wall surface surrounded by the side surface 60, the reverse side surface 61, the top surface 62, and the bottom surface 63. touch. The outer peripheral wall 21 can slide inside the housing 1 in a direction perpendicular to the front face 65 . The outer peripheral wall 21 has a surface in contact with the side surface 60 fixed to the side surface 60 and a surface in contact with the opposite side surface 61 to the opposite side surface 61 by screws, and can be removed from the housing 1 by removing the screws. That is, the adjuster 19 can be attached to and detached from the housing 1 . Further, the fixing position of the outer peripheral wall 21 and the housing 1 by screws is variable in the direction perpendicular to the front face 65 . The adjuster 19 can be attached to the housing 1 through the front face 65 in any vertical direction. A slidable attachment/detachment structure in which the positions of the adjuster 19 and the housing 1 are variable is referred to as a louver mounting structure.

The contact surface 22 is provided at the downstream end of the outer peripheral wall 21 as a rib that is perpendicular to the direction of the air flowing through the outer peripheral wall 21 and rises outward from the outer peripheral wall 21 . A contact surface 22 is fixed to the louver 20 .

Louver 20 includes support wall 27 , upper surface 23 , lower surface 24 , right surface 25 , left surface 26 and ventilation openings 73 .

The support wall 27 is a rectangular frame, rises parallel to the air flowing from the adjuster 19 , and is fixed to the contact surface 22 .

One side of the upper surface 23 at the downstream end is connected to the upper side of the support wall 27 (frame body). One side of the upstream end of the upper surface 23 extends in the inner peripheral direction of the frame, and is arranged to be inclined upstream of the frame, that is, toward the adjuster 19 .

The lower surface 24 has one side of the downstream end connected to the lower side of the frame. One side of the upstream end of the lower surface 24 extends in the inner peripheral direction of the frame, and is arranged to be inclined upstream of the frame. However, one side of the upstream end of the lower surface 24 is located downstream of one side of the upstream end of the upper surface 23 .

The right surface 25 and the left surface 26 are connected at one side of the downstream end to the side surface of the frame, and extend inclined toward the inner peripheral direction of the frame from the side surface toward the upstream direction. The right surface 25 and the left surface 26 are connected to the sides of the upper surface 23 and the lower surface 24, respectively. Here, the side edge is an edge connected to the edge of one side of the upstream end and the edge of one side of the downstream end of the upper surface 23 and the lower surface 24 . Note that the terms top surface, bottom surface, right surface, and left surface are based on the positions shown with reference to the display in FIG. Further, the adjuster 19 can be attached to the housing 1 in any vertical direction as described above. Therefore, the direction of the louver 20 does not matter either up or down. Therefore, when the louver 20 is attached, the upper surface may be positioned vertically downward and the right surface may be positioned on the left side.

The ventilation opening 73 is an opening surrounded by one side of the upstream end of the upper surface 23, one side of the upstream end of the lower surface 24, the right surface 25, and the left surface 26, and has a rectangular shape. The longitudinal direction of the ventilation opening 73 is the direction parallel to the top surface 62 , in other words, the direction connecting the right surface 25 and the left surface 26 .

The louver 20 guides the direction of the air passing through the ventilation opening 73 due to the louver shape formed by the upper surface 23 , the lower surface 24 , the right surface 25 and the left surface 26 . That is, with the above configuration, the air passing through the ventilation openings 73 is guided along the downstream side surface of the upper surface 23 in the direction of one side of the downstream end of the upper surface 23, upward as shown in FIG. . Furthermore, the air passing through the ventilation opening 73 is guided by the right surface 25 and the left surface 26 and is guided from the ventilation opening 73 in a direction that spreads to the left and right. Also, the louver 20 is arranged parallel to the same plane 66 . Here, the surface of the louver 20 refers to the opening surface of the internal space formed by the support wall 27 .

Further, since the position where the adjuster 19 is fixed to the housing 1 is variable, as a result, the louver 20 can be mounted at a variable distance from the housing 1 . Similarly, since the adjuster 19 can be attached to the housing 1 in any vertical direction, the louver 20 can be attached vertically.

The filter unit 2 (filter 5), the fan unit 3, the control unit 16, and the louver 20 configured as described above are provided detachably with respect to the housing 1. FIG. That is, as shown in FIG. 2, the filter 5 can be attached to and detached from the housing 1 by sliding it along the rails 9 and inserting it through an insertion opening 10 forming the filter frame 7 . Further, the fan unit 3 can be inserted into and removed from the inside of the housing 1 independently of the filter 5 by being inserted through an opening adjacent to the insertion port 10 provided on the same surface 66 . Further, since the control unit 16 is fixed to the fan unit 3 , it can be attached and detached together with the attachment and detachment of the fan unit 3 . The inserted fan unit 3 can be fixed to the fixing portion 29 . In particular, a structure in which the fan unit 3, the filter 5, and the control unit 16 can be detachably arranged on the same surface 66 of the housing 1 is called a detachable structure.

The louver 20 can be attached and detached parallel to the same surface 66 and with a variable distance from the housing 1 by the louver attachment structure described above. When the louver 20 is attached to the housing 1 based on the louver mounting structure, a positive pressure space 80 surrounded by the same surface 66, the louver 20, the side surface 60, the opposite side surface 61, the top surface 62, and the bottom surface 63 is formed. It is formed. That is, the air supply fan 90 has the positive pressure space 80 .

The cross-sectional area of the positive pressure space 80 is larger than the opening area of the blowout opening 72 . Here, the cross-sectional area is the cross-sectional area of the positive pressure space 80 in the direction perpendicular to the flow of air ejected from the blow-out opening 72 . Further, as shown in FIG. 1, the length X of the long side forming the ventilation opening 73 is longer than the distance Y in the direction parallel to the long side of the blowing opening 72 . Therefore, the blowing shape of the fan casing produces a uniform air flow that spreads in two directions to the left and right, thereby reducing the pressure loss when blowing from the louver, thereby effectively supplying air.

As shown in FIG. 1, the air supply fan 90 configured as described above has an air passage 18 that communicates from the air supply opening 70 in the housing 1 to the suction opening 71 via the fan unit 3 .

The schematic configuration of the air supply fan 90 has been described above.

Next, a procedure for installing the air supply fan 90 will be described with reference to FIG.

The air supply fan 90 is preferably mounted in the corner of the ceiling of the room, as shown in FIG. 5, and the vent opening 73 is positioned to challenge the center of the room. By covering the housing 1 with the interior wall and the decorative wall 67, the external appearance of the housing 1 is hidden, and only the louver 20 as a decorative plate is exposed indoors. However, since a louver 20 having a ventilation opening 73 for supplying air to the room is attached to the front face 65 of the housing 1, a decorative wall 67 facing the front face 65 is provided with a hole having the same shape as the front face 65. ing.

The housing 1 is hung from the ceiling by a hanging portion 28 using a wire or the like. The housing 1 can be mounted with both the top surface 62 and the bottom surface 63 facing the ceiling. In other words, the housing 1 can be installed on the ceiling regardless of whether the direction of the air supply opening 70 determined by the direction of the ventilation opening 73 is arranged to the left or right with respect to the front face 65 . That is, the air supply fan 90 shown in the left side of FIG. 5 is the air supply fan 90 shown on the left side of FIG. is the air supply fan 90 shown on the right side of FIG.

Further, the adjuster 19 may be attached to the housing 1 in any vertical direction. That is, the louver 20 can be attached to the housing 1 through the front face 65 without being affected by the vertical orientation of the housing 1 . By adopting such a structure, the direction of the air supply opening 70 in the housing 1 can be determined by the installer according to the installation environment, so that workability is improved without being conscious of the direction of the duct piping.

The adjuster 19 can be moved in the direction parallel to the front face 65 within the housing 1 by the louver mounting structure described above, and the fixed distance from the housing 1 is variable. That is, the louver 20 can be installed with a variable distance from the housing 1 . When the housing 1 is covered with the decorative wall 67, a gap is generated between the front face 65 and the decorative wall 67. - 特許庁On the other hand, the louver mounting structure that makes the distance variable prevents the air from flowing out from the air supply fan 90 and facilitates the alignment of the decorative wall 67 and the louver 20 . Therefore, it is not necessary to adjust the positions of the housing 1 and the decorative wall 67 at the time of construction, and the workability is simplified.

Next, the operation of the air supply fan 90 will be described with reference to FIGS. 1 and 5. FIG.

When the motor 14 is energized in the installation state shown in FIG.

Due to the rotation of the impeller 15 , the air supply fan 90 supplies air from the outside through the air supply opening 70 into the housing 1 and passes through the filter 5 installed in the air passage 18 . At this time, since the filter 5 separates and accumulates dust in the air, the supplied air is purified.

The fan unit 3 guides the air purified by the filter 5 from the suction opening 71 to the blowing opening 72 .

The air blown out from the blow-out opening 72 is pressurized in the positive-pressure space 80 and is sent out from the ventilation opening 73 with a uniform air volume. At this time, the louver 20 guides the wind direction.

When the air supply fan 90 performs the air supply operation described above for a predetermined period of time, the filter 5 separates and accumulates dust contained in the air. becomes.

Therefore, the user can easily expose the same surface 66 by facing the front 65 from the indoor side and removing the louvers 20 attached to the front 65 . Next, after removing the filter cover 11 from the same surface 66 , the filter 5 is removed from the same surface 66 by grasping the gripping portion 8 provided on the filter 5 and sliding the filter 5 forward and pulling it out.

The removed filter 5 is cleaned, or a new filter is separately attached to the housing 1 from the insertion port 10 in the reverse order. By attaching the filter cover 11 and the louver 20 to their original positions, the air supply fan 90 becomes operable, and the maintenance of the filter 5 is completed.

Further, the fan unit 3 requires periodic inspection for cleaning the ventilation air passage. Moreover, when the motor 14, the impeller 15, or the control unit 16 fails, replacement or the like is required.

At this time, the user removes the louver 20 attached to the front face 65 from the inside of the room and looks at the same face 66, similarly to when the filter 5 is replaced. The fan unit 3 is fixed with screws to the filter frame 7 and a fixing portion 29 attached inside the housing 1 and installed at a predetermined position inside the housing 1 . Therefore, this screw is removed, the fan unit 3 is slid forward from the front surface 65 and pulled out, and removed from the same surface 66. - 特許庁After cleaning or inspecting the fan unit 3 or after cleaning the inside of the housing 1, the fan unit 3 is attached to its original position so that the air supply fan 90 becomes operable, and the maintenance of the fan unit 3 is completed.

Further, since the control section 16 is integrated with the fan unit 3 , the control section 16 can also be easily attached and detached from the same surface 66 .

As described above, the air supply fan 90 can be maintained only from the front 65 direction even if it is covered with the decorative wall 67 . In other words, since the fan unit 3, the filter 5, and the control unit 16 can be attached and detached from the same surface, access from the filter 5 on the upstream side to the blowout opening 72 on the downstream side becomes easy during maintenance, and maintainability is improved. It can be a tall supply fan 90 .

In addition, since the opening area of the blow-out opening 72 is smaller than the cross-sectional area of the positive pressure space 80, dust that cannot be completely collected by the filter 5 accumulates in the positive pressure space 80 outside the blow-out opening 72 through which air diffuses. easier to do. For this reason, since the cleaning target in the fan casing 12 is limited to the vicinity of the blowout opening 72, the cleaning range is narrow and can be easily performed.

(Modification)
As another shape of the outlet opening 72 of the fan casing 12 shown in FIG. 6, the shapes shown in FIGS. 9A and 9B may be used.

9A and 9B, the outlet opening 72 has a central outer peripheral edge 91 between the suction outer peripheral edge 42 and the opposing outer peripheral edge 43 . More specifically, the central outer peripheral end portion 91 is located between the suction outer peripheral end portion 42 and the opposing outer peripheral end portion 43 in the thickness direction from the suction side plate 32 to the opposing side plate 13 (vertical direction in FIGS. 9A and 9B). To position. In addition, the central outer peripheral end portion 91 is located between the suction outer peripheral end portion 42 and the opposing outer peripheral end portion 43 in the radial direction of the spiral shape (horizontal direction in FIGS. 9A and 9B). Further, the central outer peripheral end portion 91 is parallel to the suction outer peripheral end portion 42 and the opposing outer peripheral end portion 43 in the cross section of the flow path, and is provided on the blowout vertical tangent line 44 .

In the above configuration, the fan casing 12 has two split planes 41 .

The divided structure consisting of the suction outer peripheral end portion 42, the central outer peripheral end portion 91, and the opposing outer peripheral end portion 43 is divided into the airflow blowing from the suction outer peripheral end portion 42, the airflow blowing from the central outer peripheral end portion 91, and the opposing outer peripheral end portion. By dividing the air currents blown out from 43 into three directions, the width of the blown air currents can be widened and the air can be blown in three directions at a uniform volume. In other words, the airflow blowing out from the suction outer peripheral end portion 42 and the opposing outer peripheral end portion 43 expands left and right along the plane plate 46 and the curved plate 47 . On the other hand, the blowing airflow that is blown out from the central outer peripheral end portion 91 is the blowing airflow that goes straight from the blowing opening 72 , that is, the blowing airflow that is perpendicular to the surface of the blowing opening 72 . In other words, the blowing airflow that expands to the left and right by the suction outer peripheral end portion 42 and the opposing outer peripheral end portion 43 and the blowing airflow that advances straight from the central outer peripheral end portion 91 make the airflow that blows out from the blowing opening 72 in the spiral-shaped radial direction uniform. can be

In addition, due to the difference in air blowing characteristics of the fan casing 12 and the impeller 15, in order to make the blowout of the spiral shape uniform in the radial direction, the central outer peripheral end portion 91 may You can place it by shifting it.

Further, the central outer peripheral end portion 91 may have the same length in the thickness direction as the suction outer peripheral end portion 42 and the opposed outer peripheral end portion 43 . , the opposing outer peripheral end portion 43 divides the thickness direction of the fan casing 12 into three equal parts. As a result, the airflow in the thickness direction is equally divided in terms of area. However, similarly, the lengths of the suction outer peripheral end portion 42, the central outer peripheral end portion 91, and the opposing outer peripheral end portion 43 may be adjusted according to the difference in air blowing characteristics of the fan casing 12 and the impeller 15.

For example, when the impeller 15 is a sirocco fan, the length in the thickness direction is shortened in the order of the suction outer peripheral end portion 42, the central outer peripheral end portion 91, and the opposing outer peripheral end portion 43 in terms of air blowing characteristics. By satisfying the relationship of central outer peripheral end portion 91>opposed outer peripheral end portion 43, the air volume in the thickness direction can be made uniform.

The air supply fan according to the present invention can blow out an air flow that spreads in two directions due to the blowing shape of the fan casing. It is effective as a good air blower etc.

Reference Signs List 1 housing 2 filter section 3 fan unit 4 louver section 5 filter 6 filter holding section 7 filter frame 8 grip section 9 rail 10 insertion opening 11 filter cover 12 fan casing 13 opposing side plate 14 motor 15 impeller 16 control section 17 rotating shaft 18 Air passage 19 Adjuster 20 Louver 21 Peripheral wall 22 Contact surface 23 Upper surface 24 Lower surface 25 Right surface 26 Left surface 27 Support wall 28 Hanging part 29 Fixing part 30 Front fixing plate 31 Fan motor unit 32 Suction side plate 33 Scroll 34 Blowing plane 41 Division plane 42 Suction outer peripheral end 43 Opposite outer peripheral end 44 Outlet vertical tangent 45 Intersection 46 Plane plate 47 Curved plate 48 Tongue side end 49 Outer Coanda curved surface 50 Inner Coanda curved surface 60 Side 61 Reverse side 62 Top surface 63 Bottom surface 64 Rear surface 65 Front surface 66 Same surface 67 Decorative wall 70 Air supply opening 71 Suction opening 72 Blow-out opening 73 Ventilation opening 74 One end 75 Outer peripheral side end 76 Tongues 77, 78 End 79 Divider plate 80 Positive pressure space 90 Air supply fan 91 Central outer edge 101 Housing 102 First opening 103 Second opening 104 Air flow path 105 Blower 106 First filter 107 Airflow guide 108 Second filter 109 Protruding part

Claims (15)

a suction side plate having a suction opening;
an opposing side plate provided parallel to and facing the suction side plate;
a scroll having a spiral shape that connects the suction side plate and the opposing side plate and gradually expands the flow passage cross-sectional area in the outer peripheral direction from the tongue toward the downstream;
a blowout opening formed by the suction side plate, the opposing side plate, and the scroll;
a fan motor unit that guides air from the suction opening to the blowing opening,
The cross section of the flow passage at the blowout opening is
a suction outer peripheral end portion that is closer to the suction side plate than a dividing plane that divides the thickness direction from the suction side plate to the opposing side plate and that is an outer peripheral side end portion of the spiral shape;
an opposing outer peripheral end portion that is closer to the opposing side plate than the dividing plane and is an outer peripheral end portion of the spiral shape,
one of the suction outer peripheral end portion and the opposing outer peripheral end portion is positioned further on the outer peripheral side than the other outer peripheral end portion;
The one outer peripheral end is
located on the outer peripheral side of a blowing vertical tangent line that is a tangent line of the scroll and that perpendicularly intersects the blowing plane to which the blowing opening belongs,
The other outer peripheral end is
Located on the inner peripheral side of the blowing vertical tangent,
The scroll
a flat plate that connects an intersection point where the blowing vertical tangent line intersects the scroll and the one outer peripheral end located on the outer peripheral side;
and a curved plate that connects the intersection and the other outer peripheral end located on the inner peripheral side . The plane plate is
2. The fan according to claim 1 , further comprising an outer peripheral Coanda curved surface that gently expands toward the downstream in the vicinity of the blowing opening and intersects with the blowing plane. The tongue-side end of the scroll is
2. The fan according to claim 1, further comprising an inner peripheral Coanda curved surface that gradually expands toward the downstream in the vicinity of the blowing opening and intersects with the blowing plane. The suction outer peripheral end is
2. The blower according to claim 1, wherein the blower is located on the inner peripheral side of the opposed outer peripheral end portion. The suction outer peripheral end is
2. The fan according to claim 1, which is located on the outer peripheral side of said opposed outer peripheral end. The dividing plane is
2. The fan according to claim 1, wherein the blower is provided at a position where the distance to the suction side plate and the distance to the opposing side plate are equal. The dividing plane is
2. The fan according to claim 1, wherein the blower is provided at a position where the distance to the suction side plate is longer than the distance to the opposing side plate. The cross section of the flow path further includes:
It is positioned between the suction outer peripheral end portion and the opposing outer peripheral end portion in the thickness direction from the suction side plate to the opposing side plate, and is between the suction outer peripheral end portion and the opposing outer peripheral end portion in the radial direction of the spiral shape. 2. The fan of claim 1, comprising a central peripheral edge located therebetween. The central outer peripheral edge is
9. The fan according to claim 8 , wherein the cross section of the flow path is parallel to the suction outer peripheral end portion and the opposing outer peripheral end portion. The central outer peripheral edge is
10. The blower according to claim 9 , which is positioned on a blowing vertical tangent which is a tangent to the scroll and perpendicularly intersects a blowing plane to which the blowing openings belong. The central outer peripheral edge is
9. The blower according to claim 8 , wherein the length in the thickness direction is equal to the suction outer peripheral end portion and the opposing outer peripheral end portion. a housing;
an air supply opening for supplying air from outside the housing;
a blowout opening for blowing out the air in the housing;
a filter for purifying the air supplied from the air supply opening;
a louver having a ventilation opening and guiding a wind direction of the air blown out from the blow-out opening on the downstream side of the blow-out opening;
and the blower according to any one of claims 1 to 11 , wherein air is guided from the air supply opening to the blowout opening. The louver is
arranged parallel to the blowing plane,
13. The air supply fan according to claim 12 , wherein a positive pressure space is provided between the blowout plane and the louvers for converting the air blown out from the blowout opening into a positive pressure space. The positive pressure space is
14. The air supply fan according to claim 13 , wherein the cross-sectional area of the vertical cross section with respect to the flow of air from upstream to downstream is larger than the opening area of the blow-out opening. The vent opening is
14. The air supply fan according to claim 13 , wherein the length of the long side forming the ventilation opening is longer than the distance between the two ends of the blow-out opening positioned on a straight line parallel to the long side.

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