Blower

Abstract

To obtain a blower device which makes a lower side of a housing less likely to get dirty because of oil even when used in a hanging manner under an oil mist environment.SOLUTION: A blower device 100 includes: multiple blower units each having a box-like housing formed with an air channel connecting an air inlet with an air outlet, an impeller configured to form airflow flowing from the air inlet to the air outlet in the air channel, and an electric motor for rotating the impeller, the multiple blower units arranged side by side in the housing; an oil pan 101 which receives an oil dropped from the housing; and attachment legs 10 each of which horizontally holds the oil pan 101 immediately below the housing and supports a side surface of the housing in a manner that an airflow blown direction may be changed in a vertical direction. Each attachment leg 10 may change an angle formed by the airflow blowing direction and a horizontal direction.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a blower device that is used in a suspended state. [Background technology]

[0002] Patent Document 1 discloses a blower that forms a belt-shaped air current, also called an air transport fan. The blower that forms a belt-shaped air current includes a main body box having an intake port on the rear side and an outlet port on the front side, an electric motor installed inside the main body box, and a fan attached to the shaft of the electric motor. The blower that forms a belt-shaped air current is sometimes used by being fixed to a ceiling bolt using a ceiling leg attached to the side of the main body box, and suspended from the ceiling. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-28926 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when the blower of the above configuration is used in an oil mist environment, oil mist tends to gather around the main body box. Therefore, when the blower of the above configuration is used while hanging from the ceiling in an oil mist environment, the oil adhering to the top surface and air passage of the main body box turns into oil droplets and drips during operation or after operation is stopped, which may soil the floor below the blower or objects placed below the blower. In addition, the blower may not only use the blower with the airflow blowing direction in the horizontal direction, but may also use the blower with the airflow blowing direction in the diagonal upward or downward direction. In this case, the dirt of the floor below the blower or objects placed below the blower caused by the oil as described above may worsen.

[0005] The present disclosure has been made in consideration of the above, and has an object to provide a blower device that is less likely to contaminate the lower part of the housing with oil even when used while suspended in an oil mist environment. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the blower device of the present disclosure includes a box-shaped housing in which an air passage is formed connecting an intake port and an exhaust port, an impeller that forms an airflow in the air passage from the intake port to the exhaust port, and an electric motor that rotates the impeller, and each of the blower units is arranged side by side within the housing, an oil pan that receives oil dripping from the housing, mounting legs that hold the oil pan horizontally directly below the housing and support the sides of the housing so that the blowing direction of the airflow can be changed in the vertical direction, and a first guide plate disposed under an upper end portion of an upper surface of the air passage on the outlet side, the first guide plate being for guiding oil adhering to the air passage to an oil pan; The mounting legs are capable of changing the angle between the blowing direction of the air current and the horizontal direction. The first guide plate has an L-shape consisting of a vertical plate portion extending in the height direction of the housing and a horizontal plate portion extending in the width direction of the housing, with the vertical plate portion being positioned between the multiple blower units and the horizontal plate portion being positioned below the upper end portion on the outlet side. Effect of the Invention

[0007] According to the present disclosure, it is possible to obtain an air blower that is less likely to contaminate the lower part of the housing with oil even when used while suspended in an oil mist environment. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a view of the blower device according to the first embodiment, seen from the suction port side. [Diagram 2] FIG. 1 is a view of the blower device according to the first embodiment, seen from the air outlet side. [Diagram 3] FIG. 1 is a side view of a blower according to a first embodiment; [Figure 4] 1 is a cross-sectional view parallel to a direction from an inlet to an outlet of a blower according to a first embodiment; [Diagram 5] FIG. 1 is a perspective view showing a mounting leg of a blower according to a first embodiment; [Figure 6] FIG. 1 is a perspective view showing an oil pan of a blower according to a first embodiment; [Figure 7] FIG. 4 is a perspective view of a first guide plate in the blower according to the first embodiment; [Figure 8] FIG. 1 is a perspective view showing an arrangement of a plurality of first guide plates in a blower according to a first embodiment; [Figure 9] FIG. 4 is a perspective view of a second guide plate in the blower according to the first embodiment; [Figure 10] FIG. 1 is a perspective view showing an arrangement of a plurality of second guide plates in the blower according to the first embodiment; [Figure 11] FIG. 1 is a perspective view of a blower according to a first embodiment, in which the blowing direction of an air current is obliquely downward; [Figure 12] FIG. 1 is a perspective view of a blower according to a first embodiment, in which the blowing direction of an air current is obliquely upward; [Figure 13] 1 is a cross-sectional view parallel to a direction from an inlet to an outlet of the blower device according to a first embodiment when the blowing direction of the airflow in the blower device is parallel to the horizontal direction; FIG. [Figure 14] 1 is a cross-sectional view parallel to a direction from an inlet to an outlet of the blower device according to a first embodiment when the blowing direction of the airflow in the blower device is obliquely downward; [Figure 15] 1 is a cross-sectional view parallel to a direction from an inlet to an outlet of the blower device according to a first embodiment when the blowing direction of the airflow in the blower device is obliquely upward; [Figure 16] FIG. 1 is a front view of a main part of a blower device according to a first embodiment; [Figure 17] FIG. 11 is a perspective view of another first guide plate in the blower device according to the first embodiment; [Figure 18] FIG. 11 is a perspective view showing an arrangement of a plurality of other first guide plates in the blower device according to the first embodiment; [Figure 19] FIG. 11 is a side view of another first guide plate in the blower device according to the first embodiment; [Figure 20] Cross-sectional view taken along line XX-XX in FIG. [Figure 21] FIG. 11 is a cross-sectional view of another first guide plate in the blower device according to the first embodiment, illustrating a state in which oil droplets flow through the another first guide plate; [Figure 22] FIG. 11 is a side view of another first guide plate in the blower device according to the first embodiment, illustrating a state in which oil droplets flow through the another first guide plate; [Diagram 23] FIG. 11 is a perspective view of another first guide plate in the blower device according to the first embodiment; [Figure 24] FIG. 11 is a cross-sectional view of another first guide plate in the blower device according to the first embodiment, illustrating a state in which oil droplets flow through the another first guide plate; [Diagram 25] FIG. 4 is a side view of a fixing plate for attaching the first guide plate to the housing according to the first embodiment; [Figure 26] FIG. 1 is a perspective view of a blower device according to a first embodiment, seen from the air outlet side; [Figure 27] FIG. 1 is a perspective view of a blower device according to a first embodiment, seen from the inlet side; [Figure 28] FIG. 1 is a cross-sectional view of a main part showing an attachment portion of a second guide plate according to a first embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a blower device according to an embodiment will be described in detail with reference to the drawings.

[0010] Embodiment 1 FIG. 1 is a view of the blower according to the first embodiment as viewed from the suction port side. In FIG. 1, in order to facilitate understanding of the overall configuration of the blower 100, the second guide plate 106 is omitted. FIG. 2 is a view of the blower according to the first embodiment as viewed from the outlet side. FIG. 3 is a side view of the blower according to the first embodiment as viewed from the side. FIG. 3 shows a state as viewed from the direction of the arrow A in FIG. 2. FIG. 4 is a cross-sectional view parallel to the direction from the suction port to the outlet of the blower according to the first embodiment. Note that in FIG. 4, the first guide plate 105, the second guide plate 106, and the oil pan 101 are omitted.

[0011] In the following description, the depth direction of the housing 1, which is a direction connecting the intake port 2 and the exhaust port 3, is defined as a first direction. The width direction of the housing 1, which is an arrangement direction of a plurality of blower units 80 described later, is defined as a second direction. The first direction is a direction perpendicular to the second direction. The direction corresponding to the height direction of the housing 1 and perpendicular to both the first and second directions is defined as a third direction. In each figure, the arrow X indicates the first direction, the arrow Y indicates the second direction, and the arrow Z indicates the third direction.

[0012] The blower device 100 includes a box-shaped housing 1 forming an outer shell, and a plurality of blower units 80 provided inside the housing 1. The housing 1 has a rectangular box shape with the second direction as the longitudinal direction. The housing 1 has an opening that becomes the suction port 2 on the back side. The housing 1 has an opening that becomes the blower port 3 on the front side. A plurality of air passages 4 connecting the suction port 2 and the blower port 3 are formed inside the housing 1. The air passages 4 extend along the first direction. The plurality of air passages 4 are formed in the second direction at equal intervals. The shape of the air passages 4 is cylindrical. In the first embodiment, a structure in which five air passages 4 are formed is exemplified, but the number of air passages 4 may be four or less or six or more. The air taken into the housing 1 from the suction port 2 passes through each air passage 4 and is blown out from the blower port 3.

[0013] A blower unit 80 is installed in each air passage 4. The blower unit 80 includes an impeller 5 and an electric motor 6 to which the impeller 5 is attached. The impeller 5 rotates about a rotation axis 51 parallel to the first direction, thereby generating an airflow in the air passage 4 from the intake port 2 to the exhaust port 3. The electric motor 6 rotates the impeller 5 about the rotation axis 51. That is, the rotation axis 51 is the central axis of rotation of the impeller 5 and also the central axis of rotation of the shaft of the electric motor 6. The blower unit 80 is fixed on the air passage 4 by a holding portion 15 provided in each air passage 4.

[0014] The impeller 5 is an axial flow impeller that generates an airflow in the axial direction of rotation. The impeller 5 has a boss portion 52 connected to the shaft of the electric motor 6, and a plurality of blade portions 53 extending radially from the boss portion 52.

[0015] The air inlet 2 extends in the second direction and spans multiple air ducts 4. In a certain section of the wall surface of the air duct 4 from the end on the air inlet 2 side toward the downstream, a reduced diameter section 21A is formed, the diameter of which decreases from the upstream side toward the downstream side. The reduced diameter section 21A functions as a bell mouth. Note that "upstream" and "downstream" refer to upstream and downstream with respect to the flow of the air current in the air duct 4.

[0016] The suction port 2 is provided with a protective guard 8 configured in a lattice shape. The protective guard 8 is provided to prevent foreign objects from entering each air passage 4, to prevent injuries caused by fingers or the like touching the blades, and to prevent parts such as the impeller 5 from scattering in the unlikely event that the parts come off. In the first embodiment, the protective guard 8 is described as being configured by arranging wires in a lattice shape, but this is not limited thereto, and the protective guard 8 may be configured of a net or a punched metal obtained by forming a plurality of holes in a metal plate. Even if the protective guard 8 is configured using a net or punched metal, it is possible to pass airflow and obtain the above-mentioned effects of preventing foreign objects from entering, preventing injuries, and preventing parts from scattering.

[0017] The air outlet 3 is formed on the side of the housing 1 opposite to the surface where the air inlet 2 is formed. That is, the air outlet 3 is formed on the surface of the housing 1 opposite to the surface where the air inlet 2 is formed in the first direction across the blower unit 80. The air outlet 3 is formed in a slit shape extending along the second direction and spans a plurality of air passages 4. That is, the air currents that have passed through the plurality of air passages 4 are gathered at the air outlet 3 and blown out as a band-like air current. A plurality of air outlets 3 are formed in the housing 1, and the air outlets 3 are formed in parallel with each other at intervals in the third direction. In the first embodiment, two air outlets 3, an air outlet 3A and an air outlet 3B, are formed in the housing 1. The air outlet 3A and the air outlet 3B are formed symmetrically across a plane parallel to the first direction and the second direction including the plurality of rotation axes 51, that is, symmetrically across the XY plane including the plurality of rotation axes 51. That is, the air outlet 3A and the air outlet 3B are disposed on opposite sides of the XY plane including the multiple rotation axes 51.

[0018] In the air passage 4, a nozzle section 9 is formed, the flow path area of ​​which gradually decreases from the suction port 2 side toward the air outlet 3 side downstream of the motor 6. The nozzle section 9 has a nozzle inclined section 9A and a nozzle flat section 9B. The nozzle inclined section 9A is formed inclined so as to narrow the air passage 4 evenly around the rotation axis 51 in the third direction and gradually decrease the flow path area of ​​the air passage 4. On the other hand, the nozzle flat section 9B is formed parallel to the rotation axis 51 and is connected to the air outlet 3 of the housing 1. That is, the nozzle flat section 9B is a parallel section of the wall surface of the air passage 4, the section from the end on the air outlet 3 side toward the impeller 5 being parallel to the rotation axis 51.

[0019] Between the air outlets 3 arranged in the third direction, a guide portion 7 extending in the second direction is provided. By providing the guide portion 7, the air outlet 3 is divided into two parts, an air outlet 3A and an air outlet 3B. The air outlets 3A and 3B extend in the second direction. In a cross section parallel to the first direction and the third direction, i.e., in a cross section parallel to the XZ plane, the guide portion 7 has a guide protrusion 7A formed in an arc shape with the central position of the guide portion 7 in the third direction as an apex, and a guide flat portion 7B formed downstream of the guide protrusion 7A.

[0020] In a cross section parallel to the first direction and the third direction and including the rotation axis 51, i.e., in a cross section parallel to the XZ plane and including the rotation axis 51, the dimension of the guide protrusion 7A in the third direction decreases as it moves away from the air outlet 3 toward the motor 6. The guide flat portion 7B facing the nozzle flat portion 9B of the air passage 4 is parallel to the nozzle flat portion 9B. The guide portion 7 is formed in a shape that is symmetrical across the XY plane including the multiple rotation axes 51 as a whole.

[0021] The fan device 100 has mounting legs 10 attached to the side surfaces of the housing 1, i.e., both ends of the housing 1 in the second direction. The fan device 100 is attached to a mounting surface by fixing the mounting legs 10 to a suspension bolt (not shown) installed on a mounting surface such as a wall or a ceiling.

[0022] As shown in FIG. 1, the attitude of the housing 1 relative to the mounting leg 10 can be adjusted around a rotation axis 16 provided on the side of the housing 1. That is, the mounting angle of the mounting leg 10 relative to the housing 1 can be adjusted, and the angle between the direction in which the top surface 1a of the housing 1 faces and the vertical direction can be changed within a plane parallel to the side surface 1b of the housing 1. The plane parallel to the side surface 1b of the housing 1 is a plane parallel to the XZ plane. The blowing direction of the airflow can be changed by changing the mounting angle of the housing 1 relative to the mounting leg 10. That is, the mounting leg 10 can change the angle between the blowing direction of the airflow and the horizontal direction.

[0023] Furthermore, "changing the angle between the direction in which the top surface 1a of the housing 1 faces and the vertical direction in a plane parallel to the side surface 1b of the housing 1" can be rephrased as "changing the angle between the blowing direction of the airflow in the blower device 100 and the horizontal direction in a plane parallel to the side surface 1b of the housing 1."

[0024] Fig. 5 is a perspective view showing a mounting leg of the blower according to the first embodiment. As shown in Fig. 3 and Fig. 5, the mounting leg 10 has an insertion hole 17 through which the rotation shaft 16 is inserted, and a plurality of blowing angle adjustment holes 18 provided in a fan shape at equal intervals centered on the insertion hole 17. The insertion hole 17 and the plurality of blowing angle adjustment holes 18 are formed penetrating the mounting leg 10 within the plane of the mounting leg 10.

[0025] The rotating shaft 16 provided on the side surface 1b of the housing 1 is a male screw. The mounting leg 10 is screwed to the side surface 1b of the housing 1 using a nut 19 with the rotating shaft 16 inserted through the insertion hole 17. A blowing angle adjustment protrusion (not shown) is provided on the side surface 1b of the housing 1. The mounting leg 10 can adjust the mounting angle relative to the housing 1 by selecting a blowing angle adjustment hole 18 through which the blowing angle adjustment protrusion is inserted. The blowing angle adjustment protrusion is a male screw. The mounting leg 10 is screwed to the side surface 1b of the housing 1 using a nut 20 with the blowing angle adjustment protrusion inserted through any selected blowing angle adjustment hole 18. This allows the mounting angle of the mounting leg 10 relative to the housing 1 to be adjusted to a desired angle. In FIG. 1, the nut 19 is omitted for ease of understanding of the rotating shaft 16.

[0026] 5, the lower end 10a of the mounting leg 10 has an L-shaped cross section perpendicular to the longitudinal direction of the lower end 10a, and a plurality of insertion holes 10c for fixing the oil pan 101 are formed in a short side portion 10b of the L shape. The longitudinal direction of the lower end 10a is parallel to the first direction, i.e., parallel to the X direction.

[0027] An oil pan 101 that receives oil droplets dripping from the blower device 100 is fixed to the lower end 10a of the mounting leg 10. That is, the lower end 10a of the mounting leg 10 functions as an oil pan suspension leg. The oil pan 101 is disposed vertically below the housing 1. The dimension of the oil pan 101 in the first direction may be a dimension that can receive oil droplets dripping from the blower device 100 in all positions that the blower device 100 can take. Similarly, the dimension of the oil pan 101 in the second direction may be a dimension that can receive oil droplets dripping from the blower device 100 in all positions that the blower device 100 can take.

[0028] If blower device 100 is installed in an environment where oil mist is likely to occur, such as a metal parts factory or a kitchen, the airflow sucked into housing 1 causes oil mist to gather around housing 1 and adhere to housing 1, making it easy for oil droplets to occur. Since blower device 100 has oil pan 101 disposed vertically below housing 1, oil droplets dripping from housing 1 are received by oil pan 101. Therefore, even if blower device 100 is used suspended from a ceiling in an oil mist environment, it is unlikely to soil the floor surface below blower device 100 or objects placed below blower device 100.

[0029] The mounting leg 10 has a function of fixing the housing 1 to a suspension bolt (not shown) installed on a mounting surface such as a wall or ceiling to mount the blower 100 to the mounting surface, and a function of holding the oil pan 101 horizontally regardless of the direction of the airflow from the blower 100. In other words, the mounting leg 10 combines the functions of a suspension leg for fixing the housing 1 to the suspension bolt and an oil pan suspension leg for holding the oil pan 101 horizontally. By having the mounting leg 10 function as both a suspension leg and an oil pan suspension leg, the number of steps and parts required for installing the blower 100 can be reduced.

[0030] FIG. 6 is a perspective view showing an oil pan of the blower according to the first embodiment. As shown in FIG. 6, oil pan 101 has a thin rectangular box shape with the longitudinal direction in the second direction and the top open. The bottom surface of oil pan 101 is inclined downward from the outlet 3 side to the inlet 2 side in the first direction. In addition, an oil drain 103 is provided on the rear side of the bottom surface of oil pan 101 to drain oil accumulated in oil pan 101 to the outside from oil pan 101. Since the bottom surface of oil pan 101 is inclined, oil droplets that drop into oil pan 101 flow along the bottom surface along the inclination and accumulate around oil drain 103.

[0031] The oil pan 101 has a fixing flange 101b, which is screwed to the mounting leg 10, screwed to a side surface 101a of the oil pan 101. The cross section of the fixing flange 101b perpendicular to the longitudinal direction is L-shaped. A short side portion 101c of the L-shape of the fixing flange 101b is bent perpendicular to the side surface 101a of the fixing flange 101b, and has a plurality of insertion holes (not shown) for fixing the fixing flange 101b to the mounting leg 10.

[0032] The oil pan 101 is fixed to the mounting leg 10 by screwing the L-shaped short side portion 101c of the fixing flange 101b to the short side portion 10b of the lower end portion 10a of the mounting leg 10, and is held by the mounting leg 10. As shown in FIG. 2, the oil pan 101 is fixed to the mounting leg 10 by screwing the L-shaped short side portion 101c of the fixing flange 101b to the L-shaped short side portion 10b of the lower end portion 10a of the mounting leg 10 with the insertion hole of the fixing flange 101b and the Mounting leg 10 The mounting leg 10 is secured to the mounting leg 10 by a screw 102 which passes through the insertion hole 10c of the mounting leg 10 and a nut (not shown).

[0033] When blower device 100 is attached to the mounting surface, the longitudinal direction of side surface 101a of oil pan 101 and the longitudinal direction of fixed flange 101b are parallel to the horizontal direction regardless of the installation posture of blower device 100. In other words, when blower device 100 is attached to the mounting surface, the longitudinal direction of side surface 101a of oil pan 101 and the longitudinal direction of fixed flange 101b are held parallel to the horizontal direction regardless of the installation posture of blower device 100. When blower device 100 is attached to the mounting surface, the longitudinal direction of side surface 101a of oil pan 101 and the longitudinal direction of fixed flange 101b are held parallel to the horizontal direction in this manner, which can be said to be a state in which oil pan 101 is held parallel to the horizontal direction.

[0034] As described above, oil pan 101 is fixed to mounting legs 10 and held in a horizontal direction. As a result, in blower device 100, even if the blowing direction of the airflow blown out from housing 1 becomes obliquely upward or downward by changing the attitude of housing 1, it is possible to maintain the attitude of the oil pan in a horizontal direction.

[0035] In the blower 100, as the impeller 5 rotates, air flows into the blower 100 through the gaps in the slits in the protective guard 8, as shown by the arrow F in FIG. 4. The airflow flowing into the blower 100 flows from each intake port 2 into each air duct 4. Static pressure and dynamic pressure are added to the airflow that flows into each air duct 4 by the impeller 5. The airflow that passes through the impeller 5 is divided into two by the action of the guide portion 7 and the nozzle portion 9. The divided airflows become zonal airflows extending in a second direction and are released from the air outlet 3 into the space to be air-conditioned. The released zonal airflows are used for purposes such as air curtains and circulation.

[0036] The housing 1 includes a first guide plate 105 and a second guide plate 106, which are guide plates for guiding oil droplets that have gathered in the air passage 4 or on the top surface 1a of the housing 1 to the oil pan 101. The first guide plate 105 is a blow-out side guide plate arranged on the blow-out port 3 side of the housing 1. The second guide plate 106 is a suction side guide plate arranged on the suction port 2 side of the housing 1.

[0037] The multiple first guide plates 105 are arranged in a vertical lattice pattern at the air outlet 3, protruding in a first direction away from the air outlet 3, and form a path for oil droplets that have gathered on the air passage 4 or the upper surface 1a of the housing 1 to move to the oil pan 101. The multiple first guide plates 105 are also installed in locations that are unlikely to obstruct the airflow blown out from the air outlet 3, and play a role in rectifying the swirling air blown out from the blower unit 80, which is an axial fan, to blow it out of the air passage 4 efficiently.

[0038] The multiple second guide plates 106 are arranged in a vertical lattice pattern at the suction port 2, protruding in a direction away from the suction port 2 in the first direction, and form a path for oil droplets that have gathered on the air passage 4 or the upper surface 1a of the housing 1 to move to the oil pan 101. The multiple second guide plates 106 are also installed in locations that are unlikely to obstruct the airflow sucked into the suction port 2, and play a role in rectifying the airflow sucked into the air passage 4 and efficiently guiding it to the air passage 4.

[0039] Fig. 7 is a perspective view of a first guide plate in the blower according to the first embodiment. Fig. 8 is a perspective view showing an arrangement of a plurality of first guide plates in the blower according to the first embodiment. Fig. 8 shows only the plurality of first guide plates 105, focusing on the positional relationship of the plurality of first guide plates 105 in the blower 100. The plurality of first guide plates 105 are not in contact with each other when fixed to the housing 1.

[0040] The first guide plate 105 is a metal folded product formed by folding a metal plate, which is a metal plate-shaped part, into an L shape. As shown in FIG. 2, the first guide plate 105 is disposed between two adjacent blower units 80 in the second direction and at a position corresponding to the center of each air passage 4 and each blower unit 80. The first guide plate 105 has an L shape constituted by a vertical plate portion 105a and a horizontal plate portion 105b. Here, "vertical" corresponds to the height direction of the housing 1, and corresponds to the third direction and the arrow Z. Moreover, "horizontal" corresponds to the width direction of the housing 1 and the arrangement direction of the multiple blower units 80, and corresponds to the second direction and the arrow Y.

[0041] The vertical plate portion 105a has a plate shape, and its longitudinal direction is parallel to the vertical direction when the blower device 100 is attached to the attachment surface. When attached to the housing 1, the vertical plate portions 105a of the plurality of first guide plates 105 are arranged in a vertical lattice shape, as shown in Figs. 2 and 8.

[0042] The horizontal plate portion 105b has a plate shape and is bent from the upper end of the vertical plate portion 105a and extends along the second direction. In the second direction, the horizontal plate portion 105b is inclined downward from the free end portion 105c away from the upper end of the vertical plate portion 105a toward the connecting end portion 105d that connects to the upper end of the vertical plate portion 105a. That is, the horizontal plate portion 105b is an inclined surface that is inclined downward from the free end portion 105c toward the connecting end portion 105d. That is, the horizontal plate portion 105b is an inclined surface that is inclined downward toward the connecting end portion 105d that is the connecting portion with the vertical plate portion 105a.

[0043] First guide plate 105 is disposed in housing 1 with vertical plate portion 105a protruding in the second direction in a direction away from air outlet 3 at a position between two adjacent air blowing units 80 and corresponding to the center of each air passage 4 and each air blowing unit 80. First guide plate 105 is disposed with horizontal plate portion 105b protruding in the first direction in a direction away from air outlet 3 below the upper end portion on the air passage 4's upper surface on the air outlet 3 side.

[0044] The upper surface of air passage 4 is the upper surface of the wall surface that constitutes air passage 4, and is the upper surface of the cylindrical inner surface of air passage 4. That is, first guide plate 105 is arranged so that horizontal plate portion 105b is located under the end portion on the air outlet 3 side of the upper surface of the wall surface that constitutes air passage 4. First guide plate 105 is arranged so that a part of the rear side of horizontal plate portion 105b enters air passage 4 and protrudes from air outlet 3 in a direction away from air outlet 3 in the first direction.

[0045] In the first guide plate 105 configured in this manner, oil droplets that have dropped onto the horizontal plate portion 105b flow due to gravity along the inclination of the horizontal plate portion 105b to the upper end of the vertical plate portion 105a, then flow downward along the vertical plate portion 105a, and finally drop from the vertical plate portion 105a into the oil pan 101. The arrows in Fig. 8 indicate the direction in which the oil droplets that have dropped onto the horizontal plate portion 105b flow in the first guide plate 105.

[0046] Fig. 9 is a perspective view of a second guide plate in the blower according to embodiment 1. Fig. 10 is a perspective view showing an arrangement of a plurality of second guide plates in the blower according to embodiment 1. Fig. 10 shows only the plurality of second guide plates 106, focusing on the positional relationship of the plurality of second guide plates 106 in the blower 100.

[0047] The second guide plate 106 is a metal folded product formed by bending a metal plate, which is a metal plate-like component, into a U-shape. The second guide plate 106 has a U-shape composed of two vertical plate portions 106a and a horizontal plate portion 106b.

[0048] The longitudinal direction of the vertical plate portion 106a is parallel to the vertical direction when the blower device 100 is attached to the attachment surface. When attached to the housing 1, the vertical plate portions 106a of the second guide plates 106 are arranged in a vertical lattice pattern as shown in FIG.

[0049] The horizontal plate portion 106b is bent from the upper ends of the two vertical plate portions 106a and extends along the second direction. The horizontal plate portion 106b is connected to the upper ends of the two vertical plate portions 106a and extends in the second direction. The horizontal plate portion 106b is high at the center in the second direction and inclined downward toward the end portions in the second direction. In other words, the horizontal plate portion 106b is an inclined surface that is inclined downward from the center in the second direction toward the end portions in the second direction.

[0050] The second guide plate 106 is disposed in the housing 1 with the vertical plate portion 106a protruding in the second direction between two adjacent blower units 80 in a state where it protrudes in a direction away from the suction port 2 in the first direction. The second guide plate 106 is disposed with the horizontal plate portion 106b protruding below the upper end portion on the suction port 2 side of the upper surface of the air passage 4 in a state where it protrudes in a direction away from the suction port 2 in the first direction.

[0051] In the second guide plate 106 configured in this manner, oil droplets that have dropped onto the horizontal plate portion 106b flow due to gravity along the inclination of the horizontal plate portion 106b to the upper end of the vertical plate portion 106a, then flow downward along the vertical plate portion 106a, and finally drop from the vertical plate portion 106a into the oil pan 101. The arrows in Fig. 10 indicate the direction in which the oil droplets that have dropped onto the horizontal plate portion 106b flow in the second guide plate 106.

[0052] Fig. 11 is a perspective view of the blower device according to the first embodiment when the blowing direction of the air current is obliquely downward. Fig. 12 is a perspective view of the blower device according to the first embodiment when the blowing direction of the air current is obliquely upward. Figs. 11 and 12 show a state in which the blower device 100 is hung from the ceiling of a desired place of use. In Figs. 11 and 12, for ease of understanding, the number of blower units 80 is shown as one.

[0053] As shown by arrow B in Fig. 11, when the airflow direction of blower device 100 is obliquely downward, oil droplets collected on the upper surface of the wall surface constituting air passage 4 and on upper surface 1a of housing 1 flow by gravity to horizontal plate portion 105b of first guide plate 105 as shown by arrow C in Fig. 11, then flow downward from horizontal plate portion 105b along vertical plate portion 105a, and finally drip from vertical plate portion 105a into oil pan 101. Also, oil droplets collected on the upper surface of the wall surface constituting air passage 4 may flow directly to vertical plate portion 105a of first guide plate 105 by gravity, then flow downward along vertical plate portion 105a, and finally drip from vertical plate portion 105a into oil pan 101.

[0054] In this way, the blower device 100 uses the multiple first guide plates 105 to collect the drip path of the oil droplets from the housing 1 at the first guide plates 105, thereby limiting and narrowing the drip path of the oil droplets, and causes the oil droplets to finally drip from the first guide plates 105 into the oil pan 101. In this way, the multiple first guide plates 105 in the blower device 100 can prevent the oil droplets adhering to the upper surfaces of the walls constituting the air passage 4 and the top surface 1a of the housing 1 from dripping onto the floor surface.

[0055] Moreover, the first guide plates 105 are arranged with the in-plane direction of the plate-like shape parallel to the blowing direction of the airflow of the blower device 100. That is, the in-plane direction of the vertical plate portion 105a and the in-plane direction of the horizontal plate portion 105b of the first guide plates 105 are parallel to the blowing direction of the airflow of the blower device 100. As a result, the first guide plates 105 rectify the swirling flow blown out from the blower unit 80, which is an axial fan, to blow it out of the air passage 4 efficiently, and are suppressed from interfering with the blown airflow.

[0056] As shown by arrow D in Fig. 12, when the airflow of blower 100 is blown obliquely upward, oil droplets collected on the upper surface of the wall surface constituting air passage 4 and on top surface 1a of housing 1 flow by gravity to horizontal plate portion 106b of second guide plate 106, as shown by arrow E in Fig. 12, and then flow downward from horizontal plate portion 106b along vertical plate portion 106a, and finally drip from vertical plate portion 106a into oil pan 101. Also, oil droplets collected on the upper surface of the wall surface constituting air passage 4 may flow directly to vertical plate portion 106a of second guide plate 106 by gravity, and then flow downward along vertical plate portion 106a, and finally drip from vertical plate portion 106a into oil pan 101.

[0057] In this way, the blower device 100 uses the multiple second guide plates 106 to consolidate the drip path of the oil droplets from the housing 1 to the second guide plates 106, thereby limiting and narrowing the drip path of the oil droplets, and causes the oil droplets to finally drip from the second guide plates 106 into the oil pan 101. As a result, in the blower device 100, the multiple second guide plates 106 can prevent the oil droplets adhering to the upper surfaces of the walls constituting the air passage 4 and the top surface 1a of the housing 1 from dripping onto the floor surface.

[0058] Further, the second guide plates 106 are arranged such that the in-plane direction of the plate-shaped vertical plate portion 106a is parallel to the airflow intake direction and the airflow outlet direction of the blower device 100. That is, the second guide plates 106 have the in-plane direction of the vertical plate portion 106a and the in-plane direction of the horizontal plate portion 106b parallel to the airflow intake direction and the airflow outlet direction of the blower device 100. As a result, the second guide plates 106 straighten the airflow sucked into the air passage 4 to efficiently guide it to the air passage 4, while being prevented from interfering with the sucked airflow.

[0059] FIG. 13 is a cross-sectional view parallel to the direction from the inlet to the outlet of the blower device according to the first embodiment when the blowing direction of the airflow in the blower device according to the first embodiment is parallel to the horizontal direction. FIG. 14 is a cross-sectional view parallel to the direction from the inlet to the outlet of the blower device according to the first embodiment when the blowing direction of the airflow in the blower device according to the first embodiment is diagonally downward. FIG. 15 is a cross-sectional view parallel to the direction from the inlet to the outlet of the blower device according to the first embodiment when the blowing direction of the airflow in the blower device according to the first embodiment is diagonally upward. FIG. 16 is a front view of the main part of the blower device according to the first embodiment as seen from the front side. FIGS. 13 to 16 show a state in which the blower device 100 is hung from the ceiling of a desired place of use. In FIGS. 13 to 16, the solid arrows indicate the direction in which oil droplets flow. In FIGS. 13 to 15, the outline arrows indicate the direction from the inlet 2 to the outlet 3 of the blower device 100.

[0060] With reference to FIG. 13, a main movement path of oil droplets in the case where the blowing direction of the airflow in the blowing device 100 is parallel to the horizontal direction will be described. Some of the oil droplets collected on the upper surface of the wall surface constituting the air passage 4 drip onto the lower surface of the wall surface that is the lower surface of the wall surface constituting the air passage 4, or flow along the wall surface constituting the air passage 4 to the lower surface, and drip along the lower surface from the intake port 2 to the oil pan 101. Some of the oil droplets collected on the upper surface of the wall surface constituting the air passage 4 flow onto the first guide plate 105, flow downward along the first guide plate 105, and finally drip from the first guide plate 105 to the oil pan 101. Furthermore, when a plurality of oil droplets collected on the lower surface of the wall surface constituting the air passage 4 join together to form an oil pool, they drip along the lower surface of the wall surface from the outlet port 3 to the oil pan 101.

[0061] Further, some of the oil droplets collected on the upper surface 1a of the housing 1 flow onto the first guide plate 105, flow downward along the first guide plate 105, and finally drip from the first guide plate 105 into the oil pan 101. Further, the oil droplets collected on the first guide plate 105 flow downward along the first guide plate 105, and finally drip from the first guide plate 105 into the oil pan 101. Further, the oil droplets collected on the second guide plate 106 flow downward along the second guide plate 106, and finally drip from the second guide plate 106 into the oil pan 101.

[0062] With reference to Fig. 14, a main movement path of oil droplets when the blowing direction of the airflow in the blowing device 100 is obliquely downward will be described. Some of the oil droplets collected on the upper surface of the wall surface constituting the air passage 4 drip onto the lower surface of the wall surface constituting the air passage 4, or flow along the wall surface constituting the air passage 4 to the lower surface, and drip along the lower surface from the outlet 3 to the oil pan 101. Some of the oil droplets collected on the upper surface of the wall surface constituting the air passage 4 flow onto the first guide plate 105, flow downward along the first guide plate 105, and finally drip from the first guide plate 105 to the oil pan 101. Some of the oil droplets collected on the lower surface of the wall surface constituting the air passage 4 drip along the lower surface from the outlet 3 to the oil pan 101.

[0063] Also, some of the oil droplets that have collected on the upper surface 1a of the housing 1 flow onto the first guide plate 105, flow downward along the first guide plate 105, and finally drip from the first guide plate 105 into the oil pan 101. Also, the oil droplets that have collected on the first guide plate 105 flow downward along the first guide plate 105, and finally drip from the first guide plate 105 into the oil pan 101. Also, the oil droplets that have collected on the second guide plate 106 flow downward along the second guide plate 106, and further flow downward along the outer surface of the housing 1, and finally drip from the lower end of the housing 1 into the oil pan 101.

[0064] With reference to FIG. 15, a main movement path of oil droplets when the blowing direction of the airflow in the blowing device 100 is obliquely upward will be described. Some of the oil droplets collected on the upper surface of the wall surface constituting the air passage 4 drip onto the lower surface of the wall surface constituting the air passage 4, or flow along the wall surface constituting the air passage 4 to the lower surface, and drip along the lower surface from the suction port 2 into the oil pan 101. Some of the oil droplets collected on the upper surface of the wall surface constituting the air passage 4 flow onto the second guide plate 106, flow downward along the second guide plate 106, further flow downward along the outer surface of the housing 1, and finally drip from the lower end of the housing 1 into the oil pan 101. Some of the oil droplets collected on the lower surface of the wall surface constituting the air passage 4 drip along the lower surface from the suction port 2 into the oil pan 101.

[0065] Also, some of the oil droplets collected on the upper surface 1a of the housing 1 flow to the second guide plate 106, flow downward along the second guide plate 106, further flow downward along the outer surface of the housing 1, and finally drip from the lower end of the housing 1 into the oil pan 101. Also, the oil droplets collected on the first guide plate 105 flow downward along the first guide plate 105. Thereafter, the oil droplets finally drip from the first guide plate 105 into the oil pan 101, or further flow downward along the outer surface of the housing 1, and finally drip from the lower end of the housing 1 into the oil pan 101. Also, the oil droplets collected on the second guide plate 106 flow downward along the second guide plate 106, further flow downward along the outer surface of the housing 1, and finally drip from the lower end of the housing 1 into the oil pan 101.

[0066] 16, a description will be given of the main movement path of oil droplets on first guide plate 105. Oil droplets that have collected from the upper surface of the wall forming air passage 4 and top surface 1a of housing 1 to horizontal plate portion 105b of first guide plate 105 flow downward from horizontal plate portion 105b along vertical plate portion 105a, and finally drip from vertical plate portion 105a into oil pan 101.

[0067] It should be noted that which of the two surfaces of the plate material of first guide plate 105 the oil droplets travel down depends on the position at which the oil droplets reach first guide plate 105. The same applies to second guide plate 106.

[0068] Furthermore, the dimension of oil pan 101 in the X direction, i.e., the first direction, should be the minimum dimension required to receive oil droplets dripping from blower device 100, in any of the following cases: when the airflow direction in blower device 100 is parallel to the horizontal direction, when the airflow direction in blower device 100 is diagonally downward, and when the airflow direction in blower device 100 is diagonally upward.

[0069] Next, modified examples of the shape of the above-mentioned first guide plate 105 will be described. Fig. 17 is a perspective view of another first guide plate in the blower according to the first embodiment. Fig. 18 is a perspective view showing an arrangement state of a plurality of other first guide plates in the blower according to the first embodiment. Fig. 18 shows only the plurality of other first guide plates 201, focusing on the positional relationship of the plurality of other first guide plates 201 in the blower 100. The plurality of other first guide plates 201 are not in contact with each other when fixed to the housing 1.

[0070] The other first guide plate 201 is a metal folded product formed by folding a metal plate, which is a metal plate-like part, into an L shape, similar to the above-mentioned first guide plate 105. The other first guide plate 201 is disposed, similar to the above-mentioned first guide plate 105, between two adjacent blower units 80 in the second direction and at a position corresponding to the center of each air passage 4 and each blower unit 80. The other first guide plate 201 has an L shape constituted by a vertical plate portion 201a and a horizontal plate portion 201b.

[0071] The horizontal plate portion 201b is bent from the upper end of the vertical plate portion 201a and extends along the second direction. In the second direction, the horizontal plate portion 201b is inclined downward from a free end portion 201c away from the upper end portion of the vertical plate portion 201a toward a connecting end portion 201d that connects to the upper end portion of the vertical plate portion 201a. In other words, the horizontal plate portion 201b has an inclined surface that is inclined downward from the free end portion 201c toward the connecting end portion 201d.

[0072] The vertical plate portion 201a corresponds to the vertical plate portion 105a of the above-mentioned first guide plate 105. The longitudinal direction of the vertical plate portion 201a is parallel to the vertical direction when the blower device 100 is attached to the attachment surface. The vertical plate portions 201a of the other first guide plates 201 are arranged in a vertical lattice shape when attached to the housing 1.

[0073] The vertical plate portion 201a has an upper end portion 201e connected to a connection end portion 201d of the horizontal plate portion 201b. The vertical plate portion 201a has a housing-side side surface 202 that is located on the suction port 2 side in the first direction and has a longitudinal direction parallel to the vertical direction when the blower device 100 is attached to the attachment surface.

[0074] The vertical plate portion 201a has a first outer slope 203, which is an outer side surface located on the outside in the first direction when the blower device 100 is attached to the attachment surface, and is located from the upper end portion 201e of the vertical plate portion 201a to a middle portion 201g that is a position halfway between the lower end portion 201f and the upper end portion 201e of the vertical plate portion 201a. The vertical plate portion 201a has a second outer slope 204, which is an outer side surface located on the outside in the first direction when the blower device 100 is attached to the attachment surface, and is located from the middle portion 201g of the vertical plate portion 201a to the lower end portion 201f of the vertical plate portion 201a. The outside is the side away from the housing 1 in the direction from the air inlet 2 toward the air outlet 3.

[0075] The first outer slope 203 is an inclined surface that slopes from the outside toward the suction port 2 in an upper region ranging from the upper side on the horizontal plate portion 201b side to the lower side on the lower end portion 201f side of the vertical plate portion 201a. That is, the first outer slope 203 is an inclined surface that slopes toward the suction port 2 from the upper end portion 201e of the vertical plate portion 201a toward the midway portion 201g of the vertical plate portion 201a.

[0076] The second outer slope 204 is an inclined surface that slopes from the outside toward the suction port 2 in a lower region ranging from the upper side on the horizontal plate portion 201b side to the lower side on the lower end portion 201f side of the vertical plate portion 201a. That is, the second outer slope 204 is an inclined surface that slopes toward the suction port 2 from the middle portion 201g of the vertical plate portion 201a toward the lower end portion 201f of the vertical plate portion 201a. The inclination angle of the second outer slope 204 is larger than that of the first outer slope 203.

[0077] The other first guide plate 201 has an outer side surface of the vertical plate portion 201a formed of a first outer inclined surface 203 and a second outer inclined surface 204, thereby ensuring a function of rectifying the swirling flow blown out from the blower unit 80, which is an axial fan, and can collect oil droplets that have dropped onto the other first guide plate 201 in the oil pan 101. That is, the other first guide plate 201 is provided with the second outer inclined surface 204 as a path connecting the lower end of the housing 1, which is the lowest point of the housing 1, and the first outer inclined surface 203, so that the oil droplets that have flowed downward along the other first guide plate 201 can be made to flow further downward along the outer surface of the housing 1 from the second outer inclined surface 204, and finally drip from the lower end of the housing 1 into the oil pan 101.

[0078] A case where the blower device 100 shown in Fig. 11 described above includes another first guide plate 201 instead of the first guide plate 105 will be described with reference to Fig. 11. Here, the first guide plate 105 in Fig. 11 is replaced with the other first guide plate 201. Oil droplets collected on the upper surface of the wall surface constituting the air passage 4 and the upper surface 1a of the housing 1 flow by gravity to the horizontal plate portion 201b of the other first guide plate 201, and further flow downward from the horizontal plate portion 201b along the vertical plate portion 201a, and finally drip from the vertical plate portion 201a into the oil pan 101, as shown by the arrow C in Fig. 11 described above. Here, the other first guide plate 201 allows oil droplets that have run from the horizontal plate portion 201b to the first outer slope 203 of the vertical plate portion 201a to flow from the first outer slope 203 to the second outer slope 204, and then from the second outer slope 204 along the outer surface of the housing 1, flowing downward, and finally dripping from the lower end of the housing 1 into the oil pan 101, where they can be collected.

[0079] Also, with regard to the above-mentioned first guide plate 105 having the same outer shape as the other first guide plate 201, the same effects as those of the other first guide plate 201 can be obtained.

[0080] Fig. 19 is a side view of another first guide plate in the blower according to the first embodiment. Fig. 19 shows a state seen from the direction of the arrow G in Fig. 17. Fig. 20 is a cross-sectional view taken along the line XX-XX in Fig. 19. Fig. 21 is a cross-sectional view of another first guide plate showing a state in which oil droplets flow through the other first guide plate in the blower according to the first embodiment. Fig. 21 is a view corresponding to Fig. 20. Fig. 22 is a side view of another first guide plate showing a state in which oil droplets flow through the other first guide plate in the blower according to the first embodiment. Fig. 22 is a view corresponding to Fig. 19.

[0081] As shown in Figures 19 and 20, the other first guide plate 201 has an end bent portion 207 in which the outer end of the vertical plate portion 201a in the first direction is bent and folded back toward the first surface 205 of the vertical plate portion 201a.

[0082] As shown in Figs. 17 and 20, the other first guide plate 201 has a recess 208 on the second surface 206 that extends parallel to the outer side surface of the other first guide plate 201. That is, the other first guide plate 201 has a recess 208 that extends parallel to the outer side surface of the other first guide plate 201 on the surface opposite to the surface where the end bent portion 207 of the vertical plate portion 201a is folded back. The recess 208 extends parallel to the first outer inclined surface 203 and the second outer inclined surface 204 that are the outer side surfaces of the vertical plate portion 201a, and also extends parallel to the outer side surface of the horizontal plate portion 201b. The second surface 206 is a surface that faces the opposite side to the side where the first surface 205 faces in the vertical plate portion 201a. If the first surface 205 is one surface of the other first guide plate 201, the second surface 206 can be said to be the other surface of the other first guide plate 201. In addition, a surface of the horizontal plate portion 201b continuing from the first surface 205 can also be said to be one surface of the other first guide plate 201. In addition, a surface of the horizontal plate portion 201b continuing from the second surface 206 can also be said to be the other surface of the other first guide plate 201.

[0083] In the other first guide plate 201 configured in this manner, similar to the first guide plate 105 described above, oil droplets that drip onto the horizontal plate portion 201b flow due to gravity along the slope of the horizontal plate portion 201b to the upper end portion 201e of the vertical plate portion 201a, then flow downward along the vertical plate portion 201a, and finally drip from the vertical plate portion 201a into the oil pan 101.

[0084] Here, as shown in FIG. 21, an oil droplet 221 adhering to the first surface 205 side of the other first guide plate 201 sticks to the step between the first surface 205 and the end bent portion 207 due to surface tension, and as shown in FIG. 22, moves downward along the end bent portion 207 and is guided to the lower end portion 201f of the vertical plate portion 201a, and drips from the lower end portion 201f into the oil pan 101.

[0085] As shown in FIG. 21, an oil droplet 222 adhering to the second surface 206 side of the other first guide plate 201 sticks to the recess 208 of the second surface 206 due to surface tension, descends along the recess 208, is guided to the lower end 201f of the vertical plate portion 201a, and drips from the lower end 201f into the oil pan 101.

[0086] Next, a modified example of the shape of the end bent portion 207 in the other first guide plate described above will be described. FIG. 23 is a perspective view of the other first guide plate in the blower according to the first embodiment. The other first guide plate 211 shown in FIG. 23 is different from the other first guide plate 201 described above in the shape of the end bent portion 207. In FIG. 23, the same components as those in the other first guide plate 201 described above are given the same reference numerals as those in the other first guide plate 201. FIG. 24 is a cross-sectional view of the other first guide plate showing a state in which oil droplets flow through the other first guide plate in the blower according to the first embodiment. FIG. 24 is a view corresponding to FIG. 20.

[0087] The other first guide plate 211 has an end bent portion 212 in which the outer end of the vertical plate portion 201a in the second direction is bent toward the second surface 206 and further folded back toward the first surface 205. On the second surface 206 side, a concave curved surface portion 213, which is a bent portion, is formed at the location where the outer end of the vertical plate portion 201a is bent toward the second surface 206.

[0088] In the other first guide plate 211 configured in this manner, as in the other first guide plate 201 described above, oil droplets that drip onto the horizontal plate portion 201b flow due to gravity along the slope of the horizontal plate portion 201b to the upper end portion 201e of the vertical plate portion 201a, then flow downward along the vertical plate portion 201a, and finally drip from the vertical plate portion 201a into the oil pan 101.

[0089] Here, as shown in FIG. 24, the oil droplet 223 adhering to the first surface 205 side of the other first guide plate 211 sticks to the step between the first surface 205 and the end bent portion 212 due to surface tension, descends along the end bent portion 212, is guided to the lower end portion 201f of the vertical plate portion 201a, and drips from the lower end portion 201f into the oil pan 101.

[0090] As shown in Figure 24, an oil droplet 224 adhering to the second surface 206 side of the other first guide plate 201 sticks to the concave curved surface portion 213 of the second surface 206 due to surface tension, descends along the concave curved surface portion 213, is guided to the lower end portion 201f of the vertical plate portion 201a, and drips from the lower end portion 201f into the oil pan 101.

[0091] Next, a method of attaching first guide plate 105 to housing 1 will be described. Fig. 25 is a side view of a fixing plate for attaching the first guide plate to the housing according to the first embodiment. Fig. 26 is a perspective view of the blower according to the first embodiment as viewed from the air outlet side. First guide plate 105 is fixed to housing 1 by being fixed to fixing plate 110 provided on housing 1.

[0092] The fixing plate 110 is a plate-shaped fixing component for fixing the first guide plate 105 to the housing 1, and is a metal cut product cut into a desired shape from a metal sheet. The fixing plate 110 provided in the blower device 100 includes an upper fixing plate 111 and a lower fixing plate 112. The upper fixing plate 111 is the first fixing plate 110 in the blower device 100. The lower fixing plate 112 is the second fixing plate 110 in the blower device 100.

[0093] 2 and 26, the upper fixed plate 111 is a fixed plate 110 that is disposed relatively above the housing 1 in the third direction and fixed to the housing 1. The upper fixed plate 111 is disposed with the in-plane direction of the upper fixed plate 111 parallel to the first direction and the third direction, that is, with the in-plane direction of the upper fixed plate 111 parallel to the XZ plane.

[0094] The upper fixing plate 111 is disposed in a position above the center position of the guide portion 7 in the third direction in the third direction and fixed to the housing 1. The upper fixing plate 111 is disposed in a position between the air outlet 3A and the guide portion 7 in the first direction and fixed to the housing 1. The upper fixing plate 111 is disposed in a position between two adjacent blower units 80 in the second direction and at a position corresponding to the center of each air passage 4 and each blower unit 80 and fixed to the housing 1. When the upper fixing plate 111 is disposed in a position corresponding to the center of each air passage 4 and each blower unit 80, a part of the back side is inserted into the air passage 4. The upper fixing plate 111 can be fixed to the housing 1 by, for example, welding. The method of fixing the upper fixing plate 111 to the housing 1 is not particularly limited.

[0095] 25, upper fixing plate 111 is formed with through holes 111a for fixing first guide plate 105 to upper fixing plate 111 with screws. Also, upper fixing plate 111 has a curved surface 111b on the rear side in the in-plane direction that conforms to the outer shape of guide portion 7 so as not to interfere with guide portion 7 when upper fixing plate 111 is disposed at a position corresponding to the center of each air passage 4 and each blower unit 80, as shown in FIG.

[0096] On the other hand, as shown in Fig. 7, a through hole 105e is formed on the upper side of the vertical plate portion 105a of the first guide plate 105 for fixing the first guide plate 105 to the upper fixing plate 111 with a screw. Also, as shown in Fig. 7, a first through hole 105e is formed on the side surface of the vertical plate portion 105a of the first guide plate 105 facing the housing 1. 1 The outer side is the side away from the housing 1 in the direction from the air inlet 2 to the air outlet 3.

[0097] 2 and 26, the lower fixed plate 112 is a fixed plate 110 that is disposed relatively below the housing 1 in the third direction and fixed to the housing 1. The lower fixed plate 112 is disposed with the in-plane direction of the lower fixed plate 112 parallel to the first direction and the third direction, that is, with the in-plane direction of the lower fixed plate 112 parallel to the XZ plane.

[0098] The lower fixing plate 112 is disposed in a position lower than the center position of the guide portion 7 in the third direction in the third direction and fixed to the housing 1. The lower fixing plate 112 is disposed in a position between the air outlet 3B and the guide portion 7 in the first direction and fixed to the housing 1. The lower fixing plate 112 is disposed in a position between two adjacent blower units 80 in the second direction and at a position corresponding to the center of each air passage 4 and each blower unit 80 and fixed to the housing 1. When the lower fixing plate 112 is disposed in a position corresponding to the center of each air passage 4 and each blower unit 80, a part of the back side is inserted into the air passage 4. The lower fixing plate 112 can be fixed to the housing 1 by, for example, welding. The method of fixing the lower fixing plate 112 to the housing 1 is not particularly limited.

[0099] As shown in FIG. 25, the lower fixing plate 112 is configured to fix the first guide plate 105 to the Lower fixing plate 112 25, the outer shape of the side surface on the rear side in the in-plane direction is curved surface 112b that conforms to the outer shape of guide section 7 so as not to interfere with guide section 7 when lower fixing plate 112 is disposed at a position corresponding to the center of each air passage 4 and each blower unit 80.

[0100] On the other hand, as shown in FIG. 7, the vertical plate portion 105a of the first guide plate 105 has a through hole 105f formed on the lower side thereof for fixing the first guide plate 105 to the lower fixing plate 112 with a screw.

[0101] The first guide plate 105 is attached to the housing 1 from the outside by fitting the guide portion 7 into the recess 105g, aligning the through hole 105e of the first guide plate 105 with the through hole 111a of the upper fixed plate 111, and aligning the through hole 105f of the first guide plate 105 with the through hole 112a of the lower fixed plate 112. The first guide plate 105 is fixed to the upper fixed plate 111 by passing a screw 121 through the through hole 105e of the first guide plate 105 and the through hole 111a of the upper fixed plate 111, and using a nut (not shown). The first guide plate 105 is fixed to the lower fixed plate 112 by passing a screw 122 through the through hole 105f of the first guide plate 105 and the through hole 112a of the lower fixed plate 112, and using a nut (not shown).

[0102] This makes it possible to fix the first guide plate 105 to the housing 1. Note that the first guide plate 105 may be fixed to the upper fixed plate 111 and the lower fixed plate 112 by welding.

[0103] Next, a method of attaching the second guide plate 106 to the housing 1 will be described. FIG. 27 is a perspective view of the blower according to the first embodiment, seen from the inlet side. FIG. 28 is a cross-sectional view of the essential parts showing the attachment part of the second guide plate according to the first embodiment. FIG. 28 shows a cross-sectional view of the essential parts of the part of region H in FIG. 27. The second guide plate 106 is attached to the housing 1. Back It is a part on the side Back The fixing portion 1c is fixed to the housing 1.

[0104] 9 and 28, two mounting flanges 106c are provided on the rear side of the end sides in the second direction of the horizontal plate portion 106b of the second guide plate 106. That is, the second guide plate 106 is provided with two mounting flanges 106c on the rear side of both end sides in the Y direction of the horizontal plate portion 106b.

[0105] The mounting flange 106c protrudes from the rear end of the horizontal plate portion 106b toward the rear side, and then bends upward at a right angle and extends along the third direction. That is, the mounting flange 106c has an L-shape in a cross section parallel to the in-plane direction of the vertical plate portion 106a of the second guide plate 106. The mounting flange 106c is fixed to the housing 1 using screws 123. Back As shown in FIG. 9, a through hole 106d is formed in the base 106 for fixing the base 106 to the portion 1c.

[0106] On the other hand, the case 1 Back The mounting flange 106c is attached to the portion 1c using the screw 123. Back In order to fix the portion 1c, a female screw hole (not shown) is formed.

[0107] The second guide plate 106 has a through hole 106d. Back Align the screw hole in part 1c with the screw hole in part 1c, and insert it from the outside. Back The second guide plate 106 is attached to the portion 1c. The second guide plate 106 is connected to the through hole 106d of the second guide plate 106. Back By screwing the screw 123 into the screw hole of the portion 1c from the outside, Back In this way, the second guide plate 106 can be fixed to the housing 1.

[0108] Here, since the mounting flange 106c has the above-mentioned L-shape, as shown in FIG. ,vertical A clearance 130 is formed in the first direction between the side surface 106e of the plate portion 106a on the housing 1 side and the protective guard 8. Vertical plate portion 106a is fixed to the housing 1 without interfering with the protective guard 8.

[0109] According to the above-mentioned blower device 100, a blower device is realized which comprises: a box-shaped housing in which an air passage is formed connecting an intake port and an exhaust port; a plurality of blower units each having an impeller that forms an airflow in the air passage from the intake port to the exhaust port; and an electric motor that rotates the impeller, and which are arranged side by side within the housing; an oil pan that receives oil dripping from the housing; and mounting legs that hold the oil pan horizontally directly below the housing and support the sides of the housing so that the airflow direction can be changed in the vertical direction, and the mounting legs are capable of changing the angle between the airflow direction and the horizontal direction.

[0110] As described above, the blower 100 that is used while being suspended from a ceiling surface or the like has a first guide plate 105. Air outlet 3 In preparation for this, the second guide plate 106 is Intake port 2 In preparation for this, the oil pan 101 is held parallel to the horizontal direction regardless of the installation position of the blower device 100. Therefore, in the blower device 100, the oil pan 101 can receive oil droplets that have collected in the blower device 100 regardless of the installation position of the blower device 100, i.e., regardless of the blowing direction of the airflow from the blower device 100. This makes it possible to prevent the bottom of the blower device 100 from becoming dirty with oil due to the oil that has collected in the blower device 100.

[0111] In addition, in the blower 100, the mounting leg 10 is installed with its longitudinal direction parallel to the vertical direction. The oil pan 101 is fixed to the mounting leg 10 and held in a horizontal direction. In the blower 100, when the blowing direction of the airflow from the blower 100 is set to be obliquely upward or downward, the blowing direction of the airflow is changed by changing the attitude of the housing 1 with respect to the mounting leg 10. As a result, in the blower 100, even if the blowing direction of the airflow blown out from the housing 1 becomes obliquely upward or downward, the attitude of the oil pan 101 can be maintained in a horizontal direction. Therefore, in the blower 100, even if the blowing direction of the airflow blown out from the housing 1 becomes obliquely upward or downward, the oil pan 101 does not tilt from the horizontal direction, so that the oil pan 101 can reliably perform the function of receiving and storing oil droplets dripping from the blower 100.

[0112] Moreover, the in-plane direction of first guide plate 105 attached to housing 1 is parallel to the direction from inlet 2 to outlet 3 of blower 100. This prevents first guide plate 105 from interfering with the airflow blown out from air passage 4, and rectifies the swirling airflow blown out from air passage 4, allowing the air to be blown out from air passage 4 efficiently.

[0113] Moreover, the in-plane direction of second guide plate 106 attached to housing 1 is parallel to the direction from inlet 2 to outlet 3 of blower device 100. This prevents second guide plate 106 from interfering with the intake airflow sucked into air passage 4, and rectifies the intake airflow sucked into air passage 4 to efficiently guide it to air passage 4.

[0114] In addition, in the case of a typical configuration in which oil pan 101 is tilted at the same time as the airflow from the blower is blown diagonally upward or downward, the dimensions of oil pan 101 must be significantly larger than the dimensions of the housing in order to receive oil droplets.

[0115] In contrast, the blower device 100 according to the first embodiment can hold the oil pan 101 horizontally regardless of the blowing direction of the airflow of the blower device 100. For this reason, in the blower device 100, the dimension of the oil pan 101 in the X direction, i.e., the first direction, may be set to the minimum dimension necessary to receive oil droplets dripping from the blower device 100 in any of the cases where the blowing direction of the airflow of the blower device 100 is parallel to the horizontal direction, the blowing direction of the airflow of the blower device 100 is diagonally downward, and the blowing direction of the airflow of the blower device 100 is diagonally upward. As a result, in the blower device 100, the oil pan 101 can be made smaller and lighter than in the case of the general configuration described above, and the blower device 100 can be made smaller and lighter, making the installation work easier.

[0116] Generally, blowers are used to transport hot or dirty air inside a factory in a ductless manner to a wall-mounted ventilation fan or opening, but in environments where oil mist is generated, there is a concern that oil adhering to the inside of the blower's air duct will drip from the intake or exhaust port and onto the floor, so their use is avoided.

[0117] In contrast, the blower device 100 according to the first embodiment can prevent the lower part of the blower device 100 from being soiled with oil due to the oil that has collected in the blower device 100 as described above, and therefore can be actively used even in an environment where oil mist is generated. Moreover, the blower device 100 can prevent the lower part of the blower device 100 from being soiled with oil regardless of the installation position of the blower device 100, i.e., regardless of the blowing direction of the airflow from the blower device 100, and therefore has a high degree of freedom in its applications.

[0118] As described above, in the blower device 100 of embodiment 1, even when it is hung from a ceiling or the like in an oil mist environment, the lower part of the housing 1 is less likely to be soiled with oil, and the oil pan 101 can be made smaller and lighter, which enables the blower device 100 to be made smaller and lighter, thereby providing the effect of obtaining a blower device 100 that is easy to install.

[0119] The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies. Parts of the configurations may be omitted or modified without departing from the spirit of the invention.

[0120] Various aspects of the present disclosure are summarized below as appendices.

[0121] (Appendix 1) A box-shaped housing having an air passage connecting an intake port and an exhaust port; a plurality of blower units each including an impeller that forms an airflow in the air passage from the air inlet to the air outlet, and an electric motor that rotates the impeller, the blower units being arranged side by side within the housing; an oil pan for receiving oil dripping from the housing; a mounting leg that holds the oil pan horizontally directly below the housing and supports a side surface of the housing so that the blowing direction of the airflow can be changed in the vertical direction; Equipped with The mounting legs are capable of changing an angle between the blowing direction of the airflow and a horizontal direction; A blower device characterized by the above. (Appendix 2) a first guide plate disposed under an upper end portion of an upper surface of the air passage on the air outlet side for guiding oil adhering to the air passage to the oil pan; 2. The blower device according to claim 1, (Appendix 3) The first guide plate is The housing has an L-shape including a vertical plate portion extending in a height direction and a horizontal plate portion extending in a width direction of the housing, The vertical plate portion is disposed between the plurality of blower units, The horizontal plate portion is disposed below the upper end portion on the air outlet side. 3. The blower device according to claim 2, (Appendix 4) The horizontal plate portion has an inclined surface that is inclined downward toward a connection portion with the vertical plate portion. 4. The blower device according to claim 3, (Appendix 5) the first guide plate has an end bent portion in which an end of the vertical plate portion in a direction from the suction port toward the air outlet and away from the housing is bent toward one surface of the vertical plate portion; 5. The blower device according to claim 3 or 4, (Appendix 6) the first guide plate has a recess on the other surface of the first guide plate, the recess extending parallel to an outer side surface of the first guide plate; 6. The blower device according to claim 3, wherein the blower is a fan. (Appendix 7) a second guide plate disposed under an upper end portion of an upper surface of the air passage on the side of the suction port, for guiding oil adhering to the air passage to the oil pan; 7. The blower device according to claim 1, [Explanation of symbols]

[0122] 1 Housing, 1a top, 1b,101a,106e side, 1c Back part, 2 suction port, 3, 3A, 3B blowing port, 4 air passage, 5 impeller, 6 motor, 7 guide part, 7A guide protrusion, 7B guide flat part, 8 protective guard, 9 nozzle part, 9A nozzle inclination part, 9B nozzle flat part, 10 mounting leg, 10a, 201f lower end part, 10b, 101c short side part, 10c, 17 insertion hole, 15 holding part, 16, 51 rotating shaft, 18 blowing angle adjustment hole, 19, 20 nut, 21A reduced diameter part, 52 boss part, 53 blade part, 80 blowing unit, 100 blowing device, 101 oil pan, 101b fixing flange, 102, 121, 122, 123 screw, 103 oil drain, 105 First guide plate, 105a, 106a, 201a Vertical plate portion, 105b, 106b, 201b Horizontal plate portion, 105c, 201c Free end portion, 105d, 201d Connection end portion, 105e, 105f, 106d, 111a, 112a Through hole, 105g, 208 Recess, 106 Second guide plate, 106c Mounting flange, 110 Fixing plate, 111 Upper fixing plate, 111b, 112b Curved surface portion, 112 Lower fixing plate, 130 Clearance, 201, 211 Other first guide plate, 201e Upper end portion, 201g Mid portion, 202 Housing side surface, 203 First outer inclined surface, 204 Second outer inclined surface, 205 First surface, 206 2nd side, 207,212 End bend, 213 Concave curved surface, 221,222,223,224 Oil drop.

Claims

1. A box-shaped housing having an air passage connecting an intake port and an exhaust port; a plurality of blower units each including an impeller that forms an airflow in the air passage from the air inlet to the air outlet, and an electric motor that rotates the impeller, the blower units being arranged side by side within the housing; an oil pan for receiving oil dripping from the housing; a mounting leg that holds the oil pan horizontally directly below the housing and supports a side surface of the housing so that the blowing direction of the airflow can be changed in the vertical direction; a first guide plate disposed under an upper end portion of an upper surface of the air passage on the outlet side, the first guide plate configured to guide oil adhering to the air passage to the oil pan; Equipped with The mounting legs are capable of changing an angle between the blowing direction of the airflow and a horizontal direction, The first guide plate is The housing has an L-shape including a vertical plate portion extending in a height direction and a horizontal plate portion extending in a width direction of the housing, The vertical plate portion is disposed between the plurality of blower units, The horizontal plate portion is disposed below the upper end portion on the air outlet side. A blower device characterized by the above.

2. The horizontal plate portion has an inclined surface that is inclined downward toward a connection portion with the vertical plate portion. The blower device according to claim 1 .

3. the first guide plate has an end bent portion in which an end of the vertical plate portion in a direction from the suction port toward the air outlet and away from the housing is bent toward one surface of the vertical plate portion; The blower device according to claim 2 .

4. the first guide plate has a recess on the other surface of the first guide plate, the recess extending parallel to an outer side surface located on the outer side in a direction connecting the suction port and the air outlet of the first guide plate; The blower device according to claim 3 .

5. a second guide plate is provided, which is disposed under an upper end portion of the upper surface of the air passage on the side of the suction port, and which constitutes a path for oil adhering to the air passage or oil collected on the upper surface of the housing to move to the oil pan, and which guides the oil adhering to the air passage or oil collected on the upper surface of the housing to the oil pan; The blower device according to any one of claims 1 to 4,

6. A box-shaped housing having an air passage connecting an intake port and an exhaust port; a plurality of blower units each including an impeller that forms an airflow in the air passage from the air inlet to the air outlet, and an electric motor that rotates the impeller, the blower units being arranged side by side within the housing; an oil pan for receiving oil dripping from the housing; a mounting leg that holds the oil pan horizontally directly below the housing and supports a side surface of the housing so that the blowing direction of the airflow can be changed in the vertical direction; a first guide plate that is disposed under an upper end portion of the upper surface of the air passage on the side of the air outlet, and that constitutes a path for oil adhering to the air passage or oil collected on the upper surface of the housing to move to the oil pan, and that guides the oil adhering to the air passage or the oil collected on the upper surface of the housing to the oil pan; Equipped with The mounting legs are capable of changing an angle between the blowing direction of the airflow and a horizontal direction; A blower device characterized by the above.

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