Blower

Abstract

To obtain a blower module which prevents oil from accumulating in a body box to make the lower side of the blower module less likely to get dirty with the oil even when used in a hanging manner under an oil mist environment.SOLUTION: A blower module 100 includes: a body box 1 in which openings are formed on a front wall 11 and a rear wall 12; a blower unit 2 which is installed in the body box 1 and blows air suctioned from the opening on the rear wall 12 of the body box 1 from the opening of the front wall 11 of the body box 1 to form airflow; and an oil pan 5 disposed below the body box 1 in a vertical direction. An oil discharge part 7 for discharging the oil from the inside of the body box 1 to the outside is formed on a lower wall 16 of the body box 1. The oil pan 5 receives the oil discharged from the oil discharge part 7.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present disclosure relates to a blower device used by hanging it.

Background Art

[0002] Patent Document 1 discloses a blower device also called an air conveyance fan that forms a belt-shaped air current. The blower device includes a main body box in which a suction port is formed in the back wall and a blowout port is formed in the front wall, an electric motor installed inside the main body box, and a fan attached to the shaft of the electric motor. An air passage connecting the suction port and the blowout port is formed inside the main body box.

[0003] The blower device may be used by hanging it from the ceiling. When the blower device is used by hanging it from the ceiling, it is generally practiced to attach a ceiling suspension leg to the side wall of the main body box and fix the ceiling suspension leg to a ceiling suspension bolt suspended from the ceiling.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when the blower disclosed in Patent Document 1 is used in an oil mist environment, oil mist tends to accumulate in the air passages inside the main body. Therefore, when the blower disclosed in Patent Document 1 is used suspended from the ceiling in an oil mist environment, oil adhering to the air passages inside the main body can seep out as oil droplets between the lower wall of the main body and the air passages during or after operation, causing oil to accumulate, and these oil accumulations may solidify over time. Furthermore, if the blower disclosed in Patent Document 1 is used for a long period of time, the oil accumulations may grow larger, and oil may seep out from the gaps in the main body and drip down, potentially soiling the floor below the blower or items placed below the blower.

[0006] This disclosure is made in view of the above, and aims to provide a blower that, even when suspended and used in an oil mist environment, does not accumulate oil inside the main body and does not easily contaminate the lower part of the blower with oil. [Means for solving the problem]

[0007] To solve the above-mentioned problems and achieve the objective, the blower device according to this disclosure comprises a main body enclosure having openings formed in the front and rear walls, a blower unit installed inside the main body enclosure which draws in air from the opening in the rear wall enclosure and blows it out from the opening in the front wall enclosure to form an airflow, and vertically below the main body enclosure Away from the main unit casing The oil pan is positioned, The ceiling suspension legs are installed on the side wall of the main enclosure and fixed to the ceiling suspension bolts, It is equipped with. The main enclosure's mounting angle can be adjusted relative to the ceiling mounting legs. The oil pan is positioned so that it overlaps with the main enclosure in the vertical projection. The lower wall of the main body has an oil discharge section formed therein for draining oil from the inside of the main body to the outside. The oil pan is used to collect the oil that has been discharged from the oil discharge section. Including the oil dripping from the main body of the box receive. [Effects of the Invention]

[0008] According to this disclosure, even when suspended and used in an oil mist environment, oil does not accumulate inside the main body of the casing, resulting in a blower that is less likely to be contaminated with oil below the blower. [Brief explanation of the drawing]

[0009] [Figure 1] A view of the blower according to Embodiment 1, seen from the intake side. [Figure 2] A view of the blower according to Embodiment 1, seen from the outlet side. [Figure 3] A side view of the blower according to Embodiment 1, as seen from the direction of arrow A shown in Figure 2. [Figure 4] A side view of the blower according to Embodiment 1, as seen from the direction of arrow B shown in Figure 2. [Figure 5] Perspective view showing the blower according to Embodiment 1 [Figure 6] This is a cross-sectional view along line II shown in Figure 2, illustrating a blower according to Embodiment 1 when the airflow discharge direction is parallel to the horizontal direction. [Figure 7] This diagram corresponds to a cross-sectional view along line II shown in Figure 2, and shows a cross-sectional view of the blower according to Embodiment 1 when the airflow direction is diagonally downward. [Figure 8] This diagram corresponds to a cross-sectional view along line II shown in Figure 2, and shows a cross-sectional view of the blower according to Embodiment 1 when the direction of airflow discharge is diagonally upward. [Figure 9] This figure is a side view of the blower according to Embodiment 1, viewed from the direction of arrow A shown in Figure 2, and shows the behavior of the oil pan when the oil pan according to Embodiment 1 is hooked onto the oil pan suspension legs. [Figure 10] Perspective view showing a blower according to Embodiment 2 [Figure 11] Figure 10 is a cross-sectional view along the line XI-XI shown, illustrating the lower wall and oil discharge section of the blower according to Embodiment 2. [Modes for carrying out the invention]

[0010] The blower according to the embodiment will be described in detail below with reference to the drawings.

[0011] Embodiment 1. Figure 1 is a view of the blower device 100 according to Embodiment 1, seen from the intake port 17 side. Figure 2 is a view of the blower device 100 according to Embodiment 1, seen from the outlet port 18 side. Figure 3 is a side view of the blower device 100 according to Embodiment 1, seen from the direction of arrow A shown in Figure 2. Figure 4 is a side view of the blower device 100 according to Embodiment 1, seen from the direction of arrow B shown in Figure 2. Figure 5 is a perspective view of the blower device 100 according to Embodiment 1. Figure 6 is a cross-sectional view along line II shown in Figure 2, showing the blower device 100 according to Embodiment 1 when the direction of airflow discharge is parallel to the horizontal direction. As shown in Figure 1, the blower device 100 comprises a main body casing 1, a plurality of blower units 2, a plurality of ceiling suspension legs 3, a plurality of oil pan suspension legs 4, and an oil pan 5. The blower device 100 is installed on the ceiling of a factory or the like.

[0012] In the following description, the depth direction of the blower 100 is defined as the X-axis direction, the height direction of the blower 100 is defined as the Y-axis direction, and the width direction of the blower 100 is defined as the Z-axis direction. The + direction in the X-axis direction is forward, and the - direction in the X-axis direction is backward. The + direction in the X-axis direction is the direction from the - side to the + side of the X-axis, and the - direction in the X-axis direction is the direction from the + side to the - side of the X-axis. The + direction in the Y-axis direction is upward, and the - direction in the Y-axis direction is downward. The + direction in the Y-axis direction is the direction from the - side to the + side of the Y-axis, and the - direction in the Y-axis direction is the direction from the + side to the - side of the Y-axis. The + direction in the Z-axis direction is to the right, and the - direction in the Z-axis direction is to the left. The + direction in the Z-axis direction is the direction from the - side to the + side of the Z-axis, and the - direction in the Z-axis direction is the direction from the + side to the - side of the Z-axis. Furthermore, in the following explanation, the direction parallel to the X-axis will be referred to as the front-back direction, the direction parallel to the Y-axis as the up-down direction, and the direction parallel to the Z-axis as the left-right direction.

[0013] As shown in FIGS. 1 and 2, the main body housing 1 is a box-shaped member. The main body housing 1 has a front wall 11, a rear wall 12, left and right side walls 13, 14, an upper wall 15, and a lower wall 16. As shown in FIGS. 3 and 4, the front wall 11 and the rear wall 12 are arranged apart from each other in the front-rear direction. The front wall 11 is arranged in front of the rear wall 12 and separated from the rear wall 12. As shown in FIGS. 1 and 2, the side wall 13 and the side wall 14 are arranged apart from each other in the left-right direction. The upper wall 15 and the lower wall 16 are arranged apart from each other in the up-down direction. The side wall 13, the side wall 14, the upper wall 15, and the lower wall 16 connect the outer edge of the front wall 11 and the outer edge of the rear wall 12.

[0014] As shown in FIG. 1, an opening serving as a suction port 17 is formed in the rear wall 12 of the main body housing 1. As shown in FIG. 2, an opening serving as a blowout port 18 is formed in the front wall 11 of the main body housing 1. Inside the main body housing 1, a plurality of air passages 19 connecting the suction port 17 and the blowout port 18 are formed. The plurality of air passages 19 are formed side by side at equal intervals in the left-right direction. The shape of the air passage 19 is a cylindrical shape that opens in the front-rear direction. The number of air passages 19 is five in the present embodiment, but it may be four or less or six or more.

[0015] As shown in FIG. 6, each air passage 19 includes a first air passage 19a and a second air passage 19b. The first air passage 19a and the second air passage 19b are arranged side by side in the front-rear direction. The air taken into the main body housing 1 from the suction port 17 passes through the first air passage 19a and the second air passage 19b and is blown out from the blowout port 18. In the following description, the side from which the airflow is blown out may be referred to as the blowout side, and the side opposite to the blowout side may be referred to as the suction side. The first air passage 19a is located on the suction side rather than the second air passage 19b. The second air passage 19b is located on the blowout side rather than the first air passage 19a.

[0016] As shown in FIGS. 1 and 2, the blower unit 2 is installed inside the main body housing 1, and blows out the air sucked from the suction port 17 of the rear wall 12 of the main body housing 1 from the blowout port 18 of the front wall 11 of the main body housing 1 to form an air flow. One blower unit 2 is installed in each air passage 19. A plurality of blower units 2 are stored side by side inside the main body housing 1. The plurality of blower units 2 are installed side by side in the left - right direction.

[0017] As shown in FIG. 6, the blower unit 2 has a fan 21 and an electric motor 22 that drives the fan 21. The fan 21 rotates about the rotation axis 23 to generate an air flow from the suction port 17 to the blowout port 18 in the air passage 19. The electric motor 22 rotates the fan 21 about the rotation axis 23. That is, the rotation axis 23 is the central axis of the rotation of the fan 21 and also the central axis of the rotation of the shaft of the electric motor 22. The blower unit 2 is locked to the inner surface of the air passage 19 by a holding portion (not shown) provided in each air passage 19. The fan 21 is an axial - flow fan in this embodiment, but it may be other than an axial - flow fan.

[0018] In the second air passage 19b, a guide portion 9 is provided. By providing the guide portion 9, the blowout port 18 is divided into two parts, namely the first blowout port 18a and the second blowout port 18b. The guide portion 9 has a guide convex portion 9a formed in an arc shape that protrudes toward the suction port 17, and a guide flat portion 9b formed on the blowout port 18 side and having a flat shape. The guide convex portion 9a is formed in an arc shape with the central position in the vertical direction of the guide portion 9 as the apex.

[0019] A protective guard 10 is provided at the intake port 17. The protective guard 10 is constructed, for example, by arranging multiple wires in a grid pattern. The protective guard 10 serves to prevent foreign objects from entering each air passage 19, prevent injuries caused by fingers or other objects coming into contact with the fan 21, and prevent parts from flying off in the event that parts such as the fan 21 become detached. The protective guard 10 is not limited to the illustrated example. The protective guard 10 may be made of a mesh, for example, or of perforated metal obtained by forming multiple holes in a metal plate. Even if the protective guard 10 is made of a mesh or perforated metal, air can still pass through the protective guard 10, and the aforementioned effects such as preventing foreign objects from entering, preventing injuries, and preventing parts from flying off can be obtained.

[0020] The outlet 18 is formed on the wall of the main body 1 opposite to the wall forming the intake port 17. That is, the outlet 18 is formed on the wall of the main body 1 opposite to the wall forming the intake port 17, with the blower unit 2 in between. As shown in Figure 2, the outlet 18 is formed in a slit shape that is longer in the left-right direction than in the vertical direction, and spans multiple air passages 19. As a result, the airflow that has passed through each of the multiple air passages 19 converges at the outlet 18 and is blown out as a band-shaped airflow.

[0021] As shown in Figures 3 and 4, each of the side walls 13 and 14 of the main enclosure 1 is provided with a pivot shaft 20 extending in the left-right direction. The pivot shaft 20 is, for example, a bolt. The main enclosure 1 is rotatable about the pivot shaft 20 relative to the ceiling suspension legs 3. That is, by rotating the main enclosure 1 about the pivot shaft 20, the mounting angle of the main enclosure 1 relative to the ceiling suspension legs 3 can be changed. The mounting angle of the main enclosure 1 refers to the angle formed between the direction in which the top wall 15 of the main enclosure 1 faces and the horizontal direction in a plane parallel to the side walls 13 and 14 of the main enclosure 1.

[0022] As shown in Figures 1 and 2, the ceiling suspension legs 3 are installed on the side walls 13 and 14 of the main enclosure 1. The ceiling suspension legs 3 are fixed to ceiling suspension bolts (not shown). The blower 100 is installed on the ceiling by fixing the ceiling suspension legs 3 to the ceiling suspension bolts suspended from the ceiling. One ceiling suspension leg 3 is installed on each of the left and right side walls 13 and 14 of the main enclosure 1. The ceiling suspension legs 3 are L-shaped plate-like members. The ceiling suspension legs 3 are formed by bending and drilling a single metal plate.

[0023] As shown in Figures 3 and 4, the oil pan suspension legs 4 are installed on the side walls 13 and 14 of the main body 1, overlapping the ceiling suspension legs 3. The oil pan suspension legs 4 are installed on the side walls 13 and 14 of the main body 1, overlapping the ceiling suspension legs 3. One oil pan suspension leg 4 is installed on each of the left and right side walls 13 and 14 of the main body 1. The oil pan suspension legs 4 are flat plate-shaped members. The oil pan suspension legs 4 are formed by cutting and drilling a single metal plate. The oil pan suspension legs 4 have mounting holes 41 into which fastening components that fasten the oil pan suspension legs 4, the ceiling suspension legs 3, and the main body 1 are inserted. The fastening components are a rotating shaft 20 and a nut 6. The oil pan suspension legs 4 are fixed to the side walls 13 and 14 of the main body 1 together with the ceiling suspension legs 3 by the rotating shaft 20 and the nut 6.

[0024] As shown in Figure 5, the oil pan 5 is fixed to the oil pan suspension legs 4 and positioned vertically below the main body casing 1. The oil pan 5 serves to catch oil falling from the main body casing 1. When installing the blower 100, the main body casing 1 is first mounted to the ceiling using the ceiling suspension legs 3, then the oil pan suspension legs 4 are attached to the side walls 13 and 14 of the main body casing 1, and the oil pan 5 is attached to the main body casing 1 using the oil pan suspension legs 4. In other words, since the oil pan suspension legs 4 and the oil pan 5 are independent components of the main body casing 1, the blower 100 can also be formed by retrofitting the oil pan suspension legs 4 and the oil pan 5 to an existing blower.

[0025] Next, the oil pan suspension legs 4 and the oil pan 5 will be described in more detail with reference to Figures 3 to 5.

[0026] As shown in Figures 3 and 4, multiple screw holes 42 are provided in the lower edge of each of the left and right oil pan suspension legs 4. There are two screw holes 42 on each of the left and right oil pan suspension legs 4. The two screw holes 42 are spaced apart from each other in the front-to-back direction. The screw holes 42 penetrate the oil pan suspension leg 4 in the left-to-right direction. In the following description, when distinguishing between the two screw holes 42 of each oil pan suspension leg 4, the screw hole 42 on the suction side will be referred to as the first screw hole 42a, and the screw hole 42 on the discharge side will be referred to as the second screw hole 42b.

[0027] As shown in Figure 5, the oil pan 5 is a concave-shaped member that opens upward. The oil pan 5 has a bottom wall 51 and rising walls 52 and 53 that rise from the left and right ends of the bottom wall 51. The bottom wall 51 of the oil pan 5 is inclined so that it is located downward as you move from the discharge side to the suction side. The depth of the oil pan 5 increases as you move from the discharge side to the suction side. An outlet 55 is provided in the suction side portion of the bottom wall 51 of the oil pan 5. An oil discharge pipe (not shown) is connected to the outlet 55. The oil received in the oil pan 5 is discharged through the outlet 55 and the pipe. Because the oil pan 5 is deeper on the suction side than on the discharge side and has an outlet 55 on the suction side, the center of gravity of the oil pan 5 is on the suction side.

[0028] As shown in Figures 3 and 4, each of the left and right vertical walls 52 and 53 is provided with multiple screw fixing parts 54 that are fixed to the oil pan suspension legs 4 by screws 8. There are two screw fixing parts 54 on each of the left and right vertical walls 52 and 53. The two screw fixing parts 54 are spaced apart from each other in the front-to-back direction. The screw fixing parts 54 are holes that penetrate the oil pan 5 in the left-to-right direction. Screws 8 for fastening the oil pan suspension legs 4 and the oil pan 5 are inserted into the screw holes 42 of the oil pan suspension legs 4 and the screw fixing parts 54 of the oil pan 5. In this embodiment, the oil pan 5 is fixed to the oil pan suspension legs 4 at four points using four screws 8. In the following description, when distinguishing between the two screw fixing parts 54 on each of the vertical walls 52 and 53, the screw fixing part 54 on the suction side will be referred to as the first screw fixing part 54a, and the screw fixing part 54 on the discharge side will be referred to as the second screw fixing part 54b.

[0029] The shape of the first screw fixing portion 54a on each of the left and right rising walls 52 and 53 is circular. The shape of the second screw fixing portion 54b on each of the left and right rising walls 52 and 53 is generally hook-shaped. More specifically, the shape of the second screw fixing portion 54b is such that it extends downward from the upper edge of the rising wall 52 and 53, and then extends toward the discharge side. In other words, the second screw fixing portion 54b, which is the furthest from the center of gravity of the oil pan 5 among the multiple screw fixing portions 54, is shaped to be hooked onto the screw 8 inserted into the oil pan suspension leg 4. That is, the second screw fixing portion 54b located on the side of the oil pan 5 opposite to the part with the center of gravity is shaped to be hooked onto the screw 8.

[0030] The first screw fixing portion 54a of the rising wall 52 shown in Figure 3 and the first screw fixing portion 54a of the rising wall 53 shown in Figure 4 are misaligned in the front-to-back direction. In other words, the first screw fixing portion 54a of the rising wall 52 and the first screw fixing portion 54a of the rising wall 53 are in asymmetrical positions.

[0031] Next, with reference to Figures 5 and 6, the configuration of the lower wall 16 of the main body casing 1 and the oil pan 5 will be described in more detail.

[0032] As shown in Figure 6, an oil discharge section 7 is formed in the lower wall 16 of the main body 1 for discharging oil from the inside to the outside of the main body 1. The oil discharge section 7 is a through hole that penetrates from the inner surface 16a to the outer surface 16b of the lower wall 16 of the main body 1. As shown in Figure 5, the shape of the oil discharge section 7 is circular in this embodiment, but it may be changed as appropriate. There are four oil discharge sections 7 in this embodiment, but there may be three or fewer, or five or more. One oil discharge section 7 is located at each of the four corners of the rectangular lower wall 16. The arrangement of the oil discharge sections 7 is not limited to the illustrated example and may be changed as appropriate. In the following description, when distinguishing between the four oil discharge sections 7, they will be referred to as oil discharge section 7a, oil discharge section 7b, oil discharge section 7c, and oil discharge section 7d.

[0033] The oil discharge sections 7a and 7b are located at the same position in the front-rear direction. The oil discharge sections 7a and 7b are located apart from each other in the left-right direction. The oil discharge sections 7c and 7d are located at the same position in the front-rear direction. The oil discharge sections 7c and 7d are located apart from each other in the left-right direction. The oil discharge sections 7a and 7c are located at the same position in the left-right direction. The oil discharge sections 7a and 7c are located apart from each other in the front-rear direction. The oil discharge sections 7b and 7d are located at the same position in the left-right direction. The oil discharge sections 7b and 7d are located apart from each other in the front-rear direction.

[0034] The oil pan 5 receives the oil discharged from the oil discharge port 7. The dimensions of the oil pan 5 should be such that it can receive the oil discharged from the oil discharge port 7 at all possible mounting angles of the main body 1.

[0035] Next, the main path of oil droplet movement will be described with reference to Figures 6 to 8. Figure 7 is a cross-sectional view corresponding to the cross-sectional view along line II shown in Figure 2, showing the blower 100 according to Embodiment 1 when the airflow direction is diagonally downward. Figure 8 is a cross-sectional view corresponding to the cross-sectional view along line II shown in Figure 2, showing the blower 100 according to Embodiment 1 when the airflow direction is diagonally upward. Figures 6 to 8 show the blower 100 suspended from the ceiling of the desired place of use. In Figures 6 to 8, solid arrows indicate the direction of flow of oil droplets. In Figures 6 to 8, white arrows indicate the direction of airflow from the intake port 17 to the outlet port 18 of the blower 100.

[0036] First, with reference to Figure 6, the main path of oil droplets when the airflow direction in the blower 100 is parallel to the horizontal direction will be explained. Some of the oil droplets that accumulate on the upper surface 19c of the inner surface of the air passage 19 either drip onto the lower surface 19d of the inner surface of the air passage 19, or flow downward along the inner surface of the air passage 19 and reach the lower surface 19d of the inner surface of the air passage 19. Some of the oil droplets that reach the lower surface 19d flow along the lower surface 19d towards the intake port 17 and drip from the intake port 17 into the oil pan 5. In addition, some of the oil droplets that reach the lower surface 19d seep out into the space S between the air passage 19 and the lower wall 16 of the main body casing 1 through the groove 19g formed between the lower surface 19e of the inner surface of the first air passage 19a and the lower surface 19f of the inner surface of the second air passage 19b. Oil droplets that seep into the space S drip onto the lower wall 16 of the main body 1, and then travel down the lower wall 16 of the main body 1 and drip into the oil pan 5 from one of the oil discharge ports 7a, 7b, 7c, or 7d. The oil droplets that have dripped into the oil pan 5 are discharged from the blower 100 through the discharge port 55 and piping (not shown).

[0037] Next, referring to Figure 7, the main path of oil droplets when the airflow direction in the blower 100 is diagonally downward will be described. When the airflow direction in the blower 100 is diagonally downward, the outlet 18 is located diagonally downward relative to the intake 17. Some of the oil droplets that collect on the upper surface 19c of the inner surface of the air passage 19 either drip onto the lower surface 19d of the inner surface of the air passage 19, or flow downward along the inner surface of the air passage 19 and reach the lower surface 19d of the inner surface of the air passage 19, or drip into the oil pan 5. Some of the oil droplets that reach the lower surface 19d flow along the lower surface 19d towards the outlet 18 and drip from the outlet 18 into the oil pan 5. Furthermore, some of the oil droplets that reach the lower surface 19d seep out through the groove 19g formed between the lower surface 19e of the inner surface of the first air passage 19a and the lower surface 19f of the inner surface of the second air passage 19b into the space S between the air passage 19 and the lower wall 16 of the main body 1. The oil droplets that seep out into space S drip onto the lower wall 16 of the main body 1 and travel down the lower wall 16 of the main body 1 to drip into the oil pan 5 from either the oil discharge section 7a or 7b. The oil droplets that drip into the oil pan 5 are discharged from the blower 100 through the discharge port 55 and piping (not shown).

[0038] Next, referring to Figure 8, the main path of oil droplets when the airflow direction in the blower 100 is diagonally upward will be described. When the airflow direction in the blower 100 is diagonally upward, the intake port 17 is located diagonally below the outlet port 18. Some of the oil droplets that have accumulated on the upper surface 19c of the inner surface of the air passage 19 either drip onto the lower surface 19d of the inner surface of the air passage 19, or flow downward along the inner surface of the air passage 19 and reach the lower surface 19d of the inner surface of the air passage 19. Some of the oil droplets that reach the lower surface 19d flow along the lower surface 19d towards the intake port 17 and drip from the intake port 17 into the oil pan 5. Furthermore, some of the oil droplets that reach the lower surface 19d seep out through the groove 19g formed between the lower surface 19e of the inner surface of the first air passage 19a and the lower surface 19f of the inner surface of the second air passage 19b into the space S between the air passage 19 and the lower wall 16 of the main body 1. The oil droplets that seep out into space S drip onto the lower wall 16 of the main body 1 and travel down the lower wall 16 of the main body 1 to drip into the oil pan 5 from either the oil discharge section 7c or 7d. The oil droplets that drip into the oil pan 5 are discharged from the blower 100 through the discharge port 55 and piping (not shown).

[0039] Next, the effects of the blower 100 according to this embodiment will be described with reference to Figures 3, 4, 6, and 9. Figure 9 is a side view of the blower 100 according to Embodiment 1, viewed from the direction of arrow A shown in Figure 2, and is a side view showing the behavior of the oil pan 5 when the oil pan 5 according to Embodiment 1 is hooked onto the oil pan suspension legs 4.

[0040] When the blower 100 shown in Figure 6 is installed in an environment where oil mist is likely to be generated, such as a metal parts processing plant, the air drawn into the blower 100 tends to collect oil mist in the air passage 19 inside the main body 1. As the oil mist adheres to the air passage 19 inside the main body 1, oil droplets tend to be generated. In this embodiment, an oil discharge section 7 is formed on the lower wall 16 of the main body 1 to discharge oil from the inside to the outside of the main body 1, and an oil pan 5 is positioned vertically below the main body 1 to receive the oil discharged from the oil discharge section 7. As a result, oil droplets generated in the air passage 19 drip from the oil discharge section 7 into the oil pan 5. Therefore, in this embodiment, even if the blower 100 is suspended from the ceiling and used in an oil mist environment, oil does not accumulate inside the main body 1, and the area below the blower 100 is less likely to be soiled with oil. In other words, in this embodiment, the floor surface below the blower 100 or items installed below the blower 100 are less likely to be soiled.

[0041] In this embodiment, as shown in Figures 3 and 4, the oil pan 5 is provided with a plurality of screw fixing parts 54 that are fixed to the oil pan suspension legs 4 by screws 8. Of the plurality of screw fixing parts 54, the second screw fixing part 54b, which is furthest from the center of gravity of the oil pan 5, is shaped to hook onto the screw 8 inserted into the oil pan suspension legs 4. With this configuration, when attaching the oil pan 5 to the oil pan suspension legs 4, the second screw fixing part 54b, which is located on the discharge side and furthest from the center of gravity of the oil pan 5, is first hooked onto the screw 8 inserted into the oil pan suspension legs 4. At this time, since the center of gravity of the oil pan 5 is on the suction side, the oil pan 5 rotates around the screw 8 so that the suction side portion of the oil pan 5, where the discharge port 55 is provided, is located downwards, as shown by the dashed line in Figure 9. With the second screw fixing part 54b hooked onto the screw 8, the oil pan 5 is suspended from the oil pan suspension legs 4. In other words, the oil pan 5 will not fall from the oil pan suspension legs 4. Therefore, when attaching the oil pan 5 to the oil pan support legs 4, it is no longer necessary to constantly support the oil pan 5, and the oil pan 5 can be easily attached to the oil pan support legs 4 by one person. Then, the intake side portion of the oil pan 5, where the discharge port 55 is provided, is lifted, and the screw 8 is screwed into the first screw fixing part 54a and the first screw hole 42a, and the screw 8 that was hooked onto the second screw fixing part 54b is screwed into the second screw hole 42b. By performing this attachment work on each of the left and right oil pan support legs 4, the oil pan 5 can be attached to each of the left and right oil pan support legs 4.

[0042] In this embodiment, as shown in Figures 3 and 4, the first screw fixing portion 54a on the left rising wall 52 and the first screw fixing portion 54a on the right rising wall 53 are in asymmetrical positions. This allows the oil pan 5 to be properly attached to the main body casing 1 via the oil pan suspension legs 4 without misplacing the front and rear mounting positions of the oil pan 5. In other words, the oil pan 5 can be properly attached to the main body casing 1 via the oil pan suspension legs 4 with the shallower portion of the oil pan 5 facing the discharge side and the deeper portion of the oil pan 5 facing the suction side.

[0043] Next, a modified example of Embodiment 1 will be described.

[0044] In this embodiment, as shown in Figures 3 and 4, the first screw fixing portion 54a of the left rising wall 52 and the first screw fixing portion 54a of the right rising wall 53 were in asymmetrical positions, but they may also be in symmetrical positions.

[0045] In this embodiment, as shown in Figures 3 and 4, the second screw fixing part 54b, which is furthest from the center of gravity of the oil pan 5 among the multiple screw fixing parts 54, was shaped to be hooked onto a screw 8 inserted into the oil pan suspension leg 4. However, it may also be shaped in a way that does not allow it to be hooked onto the screw 8. For example, the second screw fixing part 54b may have the same circular hole as the first screw fixing part 54a.

[0046] In this embodiment, as shown in Figures 3 and 4, the center of gravity of the oil pan 5 was on the suction side, but it may also be on the discharge side. That is, the oil pan 5 may be deeper on the discharge side than on the suction side and may have a discharge port 55 on the discharge side. In such a structure, the first screw fixing part 54a among the multiple screw fixing parts 54 will be the screw fixing part 54 furthest from the center of gravity of the oil pan 5, and the shape of the first screw fixing part 54a may be such that it can be hooked onto a screw 8 inserted into the oil pan suspension leg 4. Specifically, the shape of the first screw fixing part 54a may be such that it extends downward from the upper edge of the rising wall 52, 53 and then extends towards the suction side.

[0047] Embodiment 2. Next, the blower 100A according to Embodiment 2 will be described with reference to Figures 10 and 11. Figure 10 is a perspective view showing the blower 100A according to Embodiment 2. Figure 11 is a cross-sectional view along the line XI-XI shown in Figure 10, showing the lower wall 16 and the oil discharge section 7 in the blower 100A according to Embodiment 2. In this embodiment, the configuration of the oil discharge section 7 differs from that of Embodiment 1 described above. In Embodiment 2, parts that overlap with those of Embodiment 1 described above are denoted by the same reference numerals and their description is omitted.

[0048] As shown in Figure 11, in this embodiment, the oil discharge section 7 includes a through hole 71 and a projection 72. The oil discharge section 7 is formed in a cylindrical shape having a central axis C. The through hole 71 penetrates from the inner surface 16a to the outer surface 16b of the lower wall 16 of the main body casing 1. The inner surface 16a of the lower wall 16 is the surface facing the inside of the main body casing 1. The outer surface 16b of the lower wall 16 is the surface facing the outside of the main body casing 1.

[0049] The projection 72 extends downward from the opening edge of the through hole 71 on the outer surface 16b of the lower wall 16. The shape of the projection 72 can be cylindrical. In this embodiment, the projection 72 is cylindrical, but it may also be, for example, a square tube. In this embodiment, the shape of the through hole 71 when viewed along the through direction is circular, but it may be appropriately changed to match the shape of the projection 72.

[0050] The inner surface 16a of the lower wall 16 and the inner surface 72a of the projection 72 are perpendicular to each other. The inner surface 71a of the through hole 71 connecting the inner surface 16a of the lower wall 16 and the inner surface 72a of the projection 72 of the main body 1 is formed as an arc surface that decreases in diameter from the inner surface 16a of the lower wall 16 toward the inner surface 72a of the projection 72.

[0051] In this embodiment, the oil discharge section 7 includes a through hole 71 that penetrates from the inner surface 16a to the outer surface 16b of the lower wall 16 of the main body 1, and a cylindrical projection 72 that extends downward from the opening edge of the through hole 71 on the outer surface 16b of the lower wall 16 of the main body 1. With this configuration, oil droplets flow downward along the inner surface 71a of the through hole 71, then along the inner surface 72a of the projection 72, and drip into the oil pan 5 from the opening at the lower end of the projection 72. Therefore, oil droplets can be dripped into the oil pan 5 at a position away from the outer surface 16b of the lower wall 16 of the main body 1. In other words, it is possible to prevent oil droplets dripping from the oil discharge section 7 from flowing along the outer surface 16b of the lower wall 16. Thus, it is possible to prevent the outer surface 16b of the lower wall 16 from being contaminated by oil.

[0052] In this embodiment, the inner surface 71a of the through hole 71 connecting the inner surface 16a of the lower wall 16 of the main body 1 and the inner surface 72a of the projection 72 is formed as an arc-shaped surface that decreases in diameter from the inner surface 16a of the lower wall 16 of the main body 1 towards the inner surface 72a of the projection 72, thereby allowing oil droplets to flow smoothly.

[0053] The configurations shown in the above embodiments are examples only, and it is possible to combine them with other known technologies, combine different embodiments, and omit or modify parts of the configuration without departing from the gist of the invention. [Explanation of Symbols]

[0054] 1 Main body casing, 2 Blower unit, 3 Ceiling mounting feet, 4 Oil pan mounting feet, 5 Oil pan, 6 Nut, 7, 7a, 7b, 7c, 7d Oil discharge section, 8 Screw, 9 Guide section, 9a Guide protrusion, 9b Guide flat section, 10 Protective guard, 11 Front wall, 12 Rear wall, 13, 14 Side walls, 15 Top wall, 16 Bottom wall, 16a, 71a, 72a Inner surface, 16b Outer surface, 17 Intake port, 18 Outlet, 18a First outlet, 18b Second outlet, 19 Air passage, 19a First air passage, 19b Second air passage, 19c Upper surface, 19d, 19e, 19f Lower surface, 19g Groove, 20, 23 Rotating shaft, 21 Fan, 22 Electric motor, 41 Mounting hole, 42 Screw hole, 42a First screw hole, 42b Second screw hole, 51 Bottom wall, 52, 53 Rising wall, 54 Screw fixing part, 54a First screw fixing part, 54b Second screw fixing part, 55 Outlet, 71 Through hole, 72 Projection, 100, 100A Blower, C Central axis, S Space.

Claims

1. The main body is a box-shaped structure with openings formed in the front and rear walls, A blower unit is installed inside the main body enclosure and blows air drawn in through an opening in the rear wall of the main body enclosure and blows it out through an opening in the front wall of the main body enclosure to form an airflow. An oil pan is positioned vertically below the main body of the box, and is separated from the main body of the box. The ceiling suspension legs are installed on the side wall of the main body enclosure and fixed to ceiling suspension bolts, Equipped with, The main body enclosure can have its mounting angle changed relative to the ceiling suspension legs. The oil pan is positioned so as to overlap with the main body in the vertical projection. An oil discharge section is formed in the lower wall of the main body of the casing for discharging oil from the inside to the outside of the main body of the casing. The blower is characterized in that the oil pan receives the oil dripping from the main body, including the oil discharged from the oil discharge section.

2. The blower according to claim 1, characterized in that the oil discharge portion includes a through hole that penetrates from the inner surface to the outer surface of the lower wall of the main body, and a cylindrical projection that extends downward from the opening edge of the through hole on the outer surface of the lower wall of the main body.

3. The blower according to claim 2, characterized in that the inner surface of the through hole connecting the inner surface of the lower wall of the main body and the inner surface of the projection is formed as an arc surface that decreases in diameter from the inner surface of the lower wall of the main body toward the inner surface of the projection.

4. The ceiling suspension legs are installed one on each of the left and right side walls of the main body enclosure, The main body box is equipped with oil pan suspension legs, one on each side wall, which are superimposed on the ceiling suspension legs, The oil pan has left and right rising side walls, Each of the rising side walls of the oil pan is provided with a plurality of screw fixing parts that are fixed to the oil pan suspension legs by screws. The center of gravity of the oil pan in the front-to-back direction, where the front wall and the rear wall face each other, is located in front of or behind the center of the oil pan in the front-to-back direction. The blower according to any one of 1 to 3, characterized in that, of the plurality of screw fixing parts on each of the rising side walls, the screw fixing part furthest from the center of gravity of the oil pan in the front-rear direction is shaped to be hooked onto the screw inserted into the oil pan suspension leg.

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