blower

Abstract

To provide an air blower capable of suppressing degradation of air blowing performance and coping with miniaturization of a machine body.SOLUTION: An air blower 1 has: a box-shaped machine body 10 provided with a machine body suction port 11 and a machine body discharge port 12 opposed to each other; a first blower 20 disposed inside of the machine body; a second blower 30 disposed inside of the machine body and positioned while deviated from the first blower with respect to a machine body discharge port side; a chamber portion 40 connecting an exhaust port of the first air blower and the machine body discharge port; and clearance portions 50, 60 formed between a top surface and / or a bottom surface of the machine body so that the air can be circulated therein.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a blower device. [Background technology]

[0002] The blower is used in store kitchens, factories, and office buildings where large-volume ventilation is required, and is generally installed by hanging it from the ceiling or in the attic of these facilities.

[0003] The blower's intake and exhaust ports are connected to the facility's duct, and the blower is configured to be located in the middle of the facility's exhaust equipment (between the exhaust air intake port of a kitchen hood or the like and the exhaust port to the outdoors).

[0004] Generally, a blower device is known in which a plurality of blowers are arranged in parallel inside the body of the blower device (see, for example, Patent Document 1 below). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6463168 Summary of the Invention [Problem to be solved by the invention]

[0006] In such a blower device, the multiple blowers must be arranged in parallel within the body, offset in position along a direction perpendicular to the body inlet, so that maintenance of the blower motors can be performed through a maintenance port provided on the side of the body. Since large blowers are arranged offset in position along the direction perpendicular to the body inlet, the body size increases.

[0007] Furthermore, when multiple fans are installed inside the machine, the suction flows from each fan may interfere with each other, causing flow resistance and reducing the blowing performance. To reduce this flow resistance, it is preferable to ensure flow paths between each fan, between the fan and the machine's intake port, and between the fan and the machine's side wall, but this also leads to an increase in the size of the machine.

[0008] A blower device having a plurality of blowers arranged inside it like this tends to increase the size of the entire machine due to maintenance constraints and from the viewpoint of ensuring an internal flow path.

[0009] On the other hand, some facilities, such as store kitchens, require small-sized blower devices with a large air volume, and there has been a demand for a blower device that can meet such demands.

[0010] The present invention has been made to solve the above-mentioned problems, and aims to provide a blower device that suppresses a decrease in blowing performance and is also compatible with miniaturization of the machine body. [Means for solving the problem]

[0011] To achieve the above object, the air blower device according to the present invention includes a box-shaped body having a body inlet and a body outlet arranged opposite each other, the body inlet being provided with a first wall portion where the body inlet is formed, a second wall portion where the body outlet is formed, a third wall portion, and a fourth wall portion arranged opposite the third wall portion; a first air blower arranged inside the body; a second air blower arranged inside the body and positioned offset toward the body outlet with respect to the first air blower; a chamber portion connecting the outlet of the first air blower and the body outlet; a gap portion formed between the chamber portion and a top surface and / or a bottom surface of the body, through which air can flow; and the first blower of 、 The air passage is formed between the side surface opposite the second fan and the fourth wall portion, and allows air to flow through. [Effects of the Invention]

[0012] With the blower configured as described above, a gap through which air can flow is formed between the chamber and the top and / or bottom surfaces of the body, reducing flow resistance toward the first and second blowers and reducing pressure loss. This makes it possible to provide a blower that suppresses deterioration in blowing performance and is also compatible with downsizing of the body. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a schematic perspective view showing an air blower according to an embodiment of the present invention; [Figure 2] 1 is a schematic plan view showing a blower device according to an embodiment of the present invention; [Figure 3] FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 2. [Figure 4] 1 is a schematic front view of a blower device according to an embodiment of the present invention, viewed from the body inlet port side. [Figure 5] FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. [Figure 6] 1 is a schematic side view of a blower device according to an embodiment of the present invention as viewed from the maintenance opening side. [Figure 7] FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 6. [Figure 8] 1 is a schematic rear view of a blower device according to an embodiment of the present invention, viewed from the body outlet side. [Figure 9] FIG. 9 is a schematic cross-sectional view taken along line 9-9 in FIG. 8. [Figure 10] FIG. 10 is a partially enlarged view of part A in FIG. 9. [Figure 11] FIG. 9 is a partial enlarged view of part B in FIG. 8. [Figure 12] FIG. 4 is a diagram illustrating a configuration of a guide portion. [Figure 13] 8 is a schematic diagram corresponding to FIG. 7 of a blower according to a second modification. FIG. [Figure 14] FIG. 10 is a diagram showing airflow vectors on the lower surface of the chamber when a fluid analysis simulation of Example 1 is performed. [Figure 15]FIG. 10 is a diagram showing airflow vectors on the upper surface of the chamber when a fluid analysis simulation of Example 1 is performed. [Figure 16] FIG. 10 is a diagram showing air flow vectors on the lower surface of the chamber when a fluid analysis simulation is performed in Example 2. [Figure 17] FIG. 10 is a diagram showing air volume vectors on the upper surface of the chamber when a fluid analysis simulation of Example 2 is performed. [Figure 18] FIG. 10 is a diagram showing air flow vectors on the lower surface of the chamber when a fluid analysis simulation is performed in Example 3. [Figure 19] FIG. 10 is a diagram showing air volume vectors on the upper surface of the chamber when a fluid analysis simulation is performed in Example 3. [Figure 20] FIG. 10 is a diagram showing air volume vectors on the lower surface of the chamber when a fluid analysis simulation is performed in Comparative Example 1. [Figure 21] FIG. 10 is a diagram showing air volume vectors on the upper surface of the chamber when a fluid analysis simulation is performed in Comparative Example 1. [Figure 22] FIG. 10 is a diagram showing air volume vectors on the lower surface of the chamber when a fluid analysis simulation is performed in Comparative Example 2. [Figure 23] FIG. 10 is a diagram showing air volume vectors on the upper surface of the chamber when a fluid analysis simulation is performed in Comparative Example 2. [Figure 24] 10 is a schematic diagram corresponding to FIG. 7 of a blower device according to a fourth modification. FIG. [Figure 25] 10 is a schematic diagram corresponding to FIG. 7 of a blower according to a fifth modification. FIG. [Figure 26] 10 is a schematic diagram corresponding to FIG. 7 of a blower according to a sixth modification. FIG. [Figure 27] 13 is a schematic view corresponding to FIG. 12 of a guide portion according to a modified example. [Figure 28] 13 is a schematic view corresponding to FIG. 12 of a guide portion according to a modified example. [Figure 29] 13 is a schematic view corresponding to FIG. 12 of a guide portion according to a modified example. [Figure 30]10A and 10B are schematic diagrams for explaining the configuration of a guide portion according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described with reference to Figures 1 to 12. In the description of the drawings, the same elements are given the same reference numerals, and duplicate explanations will be omitted. Furthermore, the dimensional proportions in the drawings are exaggerated for the convenience of explanation, and may differ from the actual proportions.

[0015] FIG. 1 is a schematic perspective view showing a blower 1 according to an embodiment of the present invention. FIG. 2 is a schematic plan view showing the blower 1 according to the embodiment. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 2. FIG. 4 is a schematic front view of the blower 1 according to the embodiment when viewed from the body inlet 11A side. FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 4. FIG. 6 is a schematic side view of the blower 1 according to the embodiment when viewed from the maintenance opening 13A side. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 6. FIG. 8 is a schematic rear view of the blower 1 according to the embodiment when viewed from the body outlet 12A side. FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 8. FIG. 10 is a partial enlarged view of part A in FIG. 9. FIG. 11 is a partial enlarged view of part A in FIG. 8. FIG. 12 is a diagram for explaining the configuration of the guide section 70.

[0016] In the following description, the left-right direction viewed from the body inlet 11A is referred to as the X direction, the direction perpendicular to the body inlet 11A (depth direction of the blower 1) is referred to as the Y direction, and the vertical direction is referred to as the Z direction (see FIG. 1).

[0017] As shown in Figures 1 to 11, the blower device 1 of this embodiment has a box-shaped body 10, a first blower 20 arranged inside the body 10, a second blower 30 arranged inside the body 10, a chamber section 40 arranged inside the body 10, a first gap section (corresponding to the gap section) 50 formed between the chamber section 40 and the top surface (not shown) of the body 10, and a second gap section (corresponding to the gap section) 60 formed between the chamber section 40 and the bottom surface 15 of the body 10.

[0018] As shown in Figures 1 to 3, the machine body 10 has a first wall portion 11 in which the machine body suction port 11A is formed, a second wall portion 12 in which the machine body discharge port 12A is formed, a third wall portion 13 in which the maintenance port 13A and the terminal block panel 13B are formed, a fourth wall portion 14 arranged opposite the third wall portion 13, a bottom surface 15 provided below the first wall portion 11, the second wall portion 12, the third wall portion 13, and the fourth wall portion 14, a drain panel 16 provided below the bottom surface 15 for collecting drain liquid, and a top surface (not shown) provided above the first wall portion 11, the second wall portion 12, the third wall portion 13, and the fourth wall portion 14.

[0019] The first wall portion 11 and the second wall portion 12 are arranged to face each other. The third wall portion 13 and the fourth wall portion 14 are arranged to face each other.

[0020] The bottom surface 15 of the machine body 10 is made up of a rectangular bottom panel, and as shown in Fig. 2, a drain hole 15H is formed in the bottom surface 15. Condensed water and oil generated inside the machine body 10 are usually drained through the drain hole 15H to the drain panel 16. The drain panel 16 is configured to be at least large enough to collect the drain liquid discharged from the drain hole 15H.

[0021] Before describing the detailed configuration of the blower 1, the flow of air inside the blower 1 will be described below.

[0022] As shown in Figures 2 and 4, the casing plate 21B of the first fan 20 is connected and fixed to the first wall portion 11 in which the body suction port 11A is formed, and the first fan 20 is positioned so as to be in contact with the body suction port 11A.

[0023] On the other hand, the second fan 30 is connected and fixed to the second wall portion 12 in which the body outlet 12A is formed, and the second fan 30 is disposed so as to be in contact with the body outlet 12A.

[0024] Since the first fan 20 and the second fan 30 have the above-mentioned configuration, the air flowing into the blower device 1 from the body inlet 11A through the duct is split at the body inlet 11A and flows into flow path A and flow path B as shown in Figures 2 and 4.

[0025] The air that flows into flow path B is further divided at the second fan 30 portion, and as shown in Figure 2, is divided into flow paths B1 and B2, and is sucked in through the intake ports of the first fan 20 and the second fan 30.

[0026] The air flowing through the flow path B1 passes through the first gap 50 and the second gap 60 (sometimes referred to as a gap flow) and flows to the left of the first fan 20 in the X direction.

[0027] Hereinafter, the first suction section 11M (body suction port opening area S1) of the body suction port 11A portion serving as the inlet of the flow path A will be defined.

[0028] As shown in Figure 4, when viewed from the body suction port 11A side, the body suction port 11A has a first suction section 11M formed on the side opposite the motor of the first blower 20 (left side in Figure 4), and a second suction section 11N formed on the motor side (right side in Figure 4).

[0029] As shown in Fig. 4, the first suction section 11M is covered by a side surface 11L of the body suction port 11A on the side opposite to the second fan 30 side (the left side in Fig. 4) and a side surface 21L of the casing plate 21B of the casing 21 of the first fan 20 on the side opposite to the second fan 30 side (the left side in Fig. 4). The second suction section 11N is the area indicated by a two-dot chain line in Fig. 4. The area S1 of the first suction section 11M (the body suction port opening area) is larger than one-half the opening area S2 of the discharge port 23 of the first fan 20.

[0030] Generally, a larger body suction port opening area S1 is preferable to increase the amount of air taken in. However, excessively increasing the body suction port opening area S1 leads to an increase in the size of the body. Here, in the configuration of the present invention, by ensuring that the area S1 of the first suction section 11M (body suction port opening area) is at least half the opening area S2 of the outlet 23 of the first fan 20, the main suction volume can be supplemented by air flowing into the main suction port due to clearance flow, even when taking into account the opening ratio between the main suction port on the bellmouth 24 side (see FIG. 5) and the auxiliary suction port on the motor 20M side, and the ratio of blade workload due to the position of the power transmission plate.

[0031] 2 and 4, the air flowing through flow path B1 becomes a gap flow and flows to the left of the first fan 20 in the X direction. However, depending on the position of the fan within the airframe 10, a gap flow may occur to the right of the X direction from flow path A toward flow path B1. For example, in FIG. 2, this corresponds to a configuration in which the first fan 20 and chamber 40 are moved 85 mm toward the third wall 13 and positioned closer to the second fan 30. In this configuration, the bell mouth 34 (left side of FIG. 2), which is the main air intake side of the second fan 30, does not obtain a sufficient suction volume. However, the generation of a gap flow on the right of the X direction from flow path A toward flow path B1 can compensate for the main air intake volume of the second fan 30. Furthermore, by positioning the first fan 20 closer to the second fan 30, the width of the airframe 10 in the X direction can be reduced. Therefore, the airframe 10 can be made smaller while suppressing a decrease in air blowing performance. Furthermore, since the first fan 20 is located closer to the maintenance opening 13A, the first fan 20 can be easily accessed, which contributes to improving the ease of maintenance.

[0032] Next, the internal structure of the machine body 10 will be described with reference to FIGS.

[0033] The first fan 20 is a double-suction fan. In the first fan 20, the bell mouth 24 side (left side in FIG. 2) is the main suction port, and the bell mouth 25 on the motor 20M side (right side in FIG. 2) is the sub-suction port.

[0034] As shown in Figures 5 and 7, motor 20M and the blade portion of sirocco fan 20F are connected by power transmission plate 20S. As shown in Figure 7, power transmission plate 20S is positioned closer to motor 20M than the center of the blades, and divides the space inside sirocco fan 20F into the motor 20M side (right side in Figure 2) and the bellmouth 24 side (left side in Figure 2). Because the blade area on the bellmouth 24 side (left side in Figure 2) is larger and there is no suction resistance member like there is on motor 20M, the bellmouth 24 side (left side in Figure 2), which has higher suction capacity, forms the main suction port, and the bellmouth 25 on the motor 20M side (right side in Figure 2) forms the sub-suction port. The second blower has a similar configuration.

[0035] As shown in FIGS. 1 and 3, the casing 21 of the first fan 20 is disposed so as to contact the air intake 11A of the airframe. As shown in FIG. 1, the casing 21 is composed of a casing body 21A that houses the sirocco fan 20F and casing plates 21B that are provided on both sides of the casing body 21A and connect the casing body 21A to the airframe 10 to secure the first fan 20 to the airframe 10. As shown in FIGS. 3 and 5, the casing body 21A is composed of casing side walls 28 that face each other on the left and right sides of the sirocco fan 20F and a scroll-shaped casing main plate 29 that covers the outer periphery of the sirocco fan. The opening of the casing side wall 28 forms the bell mouth 24. The upper and lower surfaces of the casing plate 21B are connected and fixed to the top and bottom surfaces 15 of the airframe 10, respectively, and one side of the casing plate 21B is connected and fixed to the airframe air intake 11A. This connected and fixed state constitutes one mode in which casing 21 of first fan 20 is disposed close to airframe intake port 11A. In this close-positioned mode, if casing plate 21B is not present, spaces are formed between casing main plate 29 and the top and bottom surfaces of airframe 10. If casing plate 21B is not present, air will also flow into the airframe through these spaces.

[0036] By driving the motor 20M of the first fan 20, air is drawn in through the body inlet 11A, and then from both sides of the first fan 20 in the X direction. The air discharged from the outlet 23 of the first fan 20 moves to the chamber 40, and after moving within the chamber 40, is discharged from the body outlet 12A of the body 10.

[0037] The motor 20M of the first fan 20 can be removed and replaced through a maintenance opening 13A in the third wall portion 13, as shown in FIG.

[0038] The second fan 30 is a double-inlet fan. In the second fan 30, the bell mouth 34 side (left side in FIG. 2) is the main inlet, and the bell mouth 35 on the motor 30M side (right side in FIG. 2) is the sub-inlet. The configuration of the second fan 30 is substantially the same as that of the first fan 20, so a detailed description will be omitted.

[0039] By driving the motor 30M of the second fan 30, air is drawn in through the body inlet 11A, and air is drawn in from both sides in the X direction of the second fan 30. Then, the air discharged from the outlet 33 of the second fan 30 is discharged from the body outlet 12A of the machine body 10.

[0040] The motor 30M of the second fan 30 can be removed and replaced through a maintenance opening 13A in the third wall portion 13, as shown in FIG.

[0041] The chamber 40 is disposed inside the body 10. As shown in Fig. 2, the chamber 40 is disposed on the body outlet 12A side of the first blower 20, and closer to the fourth wall 14 than the second blower 30. The inlet 40A of the chamber 40 is connected to the exhaust port of the first blower 20, and the outlet of the chamber 40 is connected to the body outlet 12A of the second wall 12 of the body 10.

[0042] The chamber portion 40 forms a flow path through which the air discharged from the outlet 23 of the first blower 20 reaches the body outlet 12A.

[0043] As shown in Fig. 2, the chamber 40 is configured so that the flow path area gradually increases from the outlet 23 of the first blower 20 toward the body outlet 12A. Here, for example, if the flow path area suddenly increases or decreases from the outlet 23 of the first blower 20 toward the body outlet 12A, this is undesirable because it increases pressure loss in the chamber. In contrast, the chamber 40 of the blower device 1 according to this embodiment is configured so that the flow path area gradually increases from the outlet 23 of the first blower 20 toward the body outlet 12A, thereby reducing pressure loss in the chamber 40.

[0044] As shown in Figure 2, the chamber section 40 has an inclined section 41 that is provided on the right side in the X direction and slopes from the exhaust port 23 of the first blower 20 to the body discharge port 12A toward the second blower 30 (right side in the X direction), and a straight section 42 that is provided on the left side in the X direction and is configured along the Y direction.

[0045] The inclination angle of the inclined portion 41 with respect to the Y direction is not particularly limited, but is preferably 10 to 40 degrees, and more preferably 20 to 25 degrees. By providing the inclined portion 41 in this manner, the flow of air toward the main inlet on the bell mouth 34 side of the second fan 30 can be rectified and turbulence within the airframe 10 can be suppressed. Therefore, a decrease in air blowing performance can be more suitably suppressed. Note that the above-mentioned preferable angle can be set appropriately within this range even when the straight portion 42 is inclined with respect to the Y direction.

[0046] 2 and 3, the inlet 40A of the chamber 40 has substantially the same flow path area and shape as the outlet 23 of the first blower 20. This reduces pressure loss at the boundary between the inlet 40A of the chamber 40 and the outlet 23 of the first blower 20.

[0047] For example, if straight section 42 were not parallel to the Y direction but were inclined to the left in the X direction as it moved in the positive direction of the Y direction, the left side of chamber section 40 in the X direction would be blocked, preventing effective flow of gap air from first gap 50 and second gap 60. In contrast, straight section 42 of blower 1 according to this embodiment is arranged parallel to the Y direction, and therefore does not block the left side of chamber section 40, allowing effective flow of gap air from first gap 50 and second gap 60.

[0048] 1 and 3, the chamber 40 has an upper surface 43 and a bottom surface 44. A first gap 50 is formed between the upper surface 43 of the chamber 40 and the top surface of the body 10. A second gap 60 is formed between the bottom surface 44 of the chamber 40 and the bottom surface 15 of the body 10.

[0049] As shown in Fig. 7, the first gap 50 is formed at least closer to the airframe discharge port 12A than the opening edge 30E of the air intake of the second fan 30 on the airframe discharge port 12A side. Also, as shown in Fig. 7, the second gap 60 is formed at least closer to the airframe discharge port 12A than the opening edge 30E of the air intake of the second fan 30 on the airframe discharge port 12A side. With this configuration, the first gap 50 and the second gap 60 are formed in an area where the second fan 30 has little suction, so that a gap flow can be effectively formed.

[0050] Next, the configuration of the machine body 10 will be described in more detail with reference to FIGS.

[0051] In the machine body 10, the first wall portion 11 in which the machine body inlet 11A is provided has a first panel (not shown) and a second panel (not shown). In addition, in the machine body 10, the second wall portion 12 in which the machine body outlet 12A is provided has a first panel 12B and a second panel 12C, as shown in Figures 8 to 11.

[0052] Here, since the first panel of the first wall portion 11 and the first panel 12B of the second wall portion 12, as well as the second panel of the first wall portion 11 and the second panel 12C of the second wall portion 12, have approximately the same configuration, the following will describe the configuration of the first panel 12B and the second panel 12C of the second wall portion 12 as representatives.

[0053] As shown in Fig. 10, second panel 12C is adjacent to first panel 12B on the outer side in the Y direction. Second panel 12C is formed contiguous with bottom surface 15. In other words, a flange portion (corresponding to second panel 12C) rising in the Z direction is connected to an end surface of bottom surface 15, and this flange portion and bottom surface 15 form a shallow, box-shaped body bottom plate. First wall portion 11 to fourth wall portion 14, which have first panel 12B, are arranged so as to contact the inside of the flange portion of bottom surface 15 of body 10, and walls 11 to 14 are fixed to a top panel above to form body 10 of blower 1.

[0054] As shown in Figures 8 and 10, the first panel 12B and the second panel 12C are connected to the drain panel 16 by a connection portion 80. Here, as shown in Figures 2 and 4, the length of the drain panel in the Y direction is longer than the bottom surface 15, and it protrudes outward by a predetermined width in a plan view. On the other hand, the width of the drain panel 16 in the X direction is shorter than the bottom surface 15.

[0055] The connecting portion 80 is not particularly limited, but is composed of an L-shaped member 80a with a generally L-shaped cross section that extends from the drain panel 16. One side of the L-shaped member 80a has the same length as the protruding width of the drain panel 16, and the other side is connected to the first panel 12B and the second panel 12C with screws. Through this connecting portion 80, the drain panel 16 and the fuselage 10 are connected in a state where they protrude outward a predetermined width.

[0056] As shown in Figures 8, 10, and 11, the second panel 12C has a guide portion 70 that guides drain liquid flowing down from the duct connection port 17 of the body 10 to the drain panel 16. Note that the second panel 12C on which the guide portion 70 is formed is part of the body bottom plate that constitutes the box-shaped body 10, and is not a component provided separately for guiding drain liquid. For this reason, by forming the guide portion 70 in an existing component, it is possible to effectively utilize the existing component and reduce component costs.

[0057] In this embodiment, the guide portion 70 is a recess formed in a recessed shape in the reference surface 12S of the second panel 12C, as shown in Fig. 11. Here, the reference surface 12S of the second panel 12C is a plane along the X direction at a portion of the top surface of the second panel 12C where the guide portion 70 does not exist.

[0058] As shown in FIGS. 8 and 10, the guide portion 70 is provided vertically below the duct connection port 17 in the second wall portion 12 (corresponding to the side surface on which the duct connection port 17 is provided).

[0059] As shown in Fig. 8, when viewed from the duct connection port 17 side, at least a portion of the guide portion 70 is formed in an area more inward than the end of the drain panel 16. Furthermore, as shown in Fig. 11, when viewed from the duct connection port 17 side, at least a portion of the guide portion 70 is provided outside the outflow point P of the drain liquid at the duct connection port 17. With this configuration, the drain liquid can be suitably collected in the drain panel 16.

[0060] In this specification, the outflow point P of the drain liquid is defined as the point where the drain liquid leaking from the duct connection port 17 first comes into contact with the first panel 12B.

[0061] As shown in FIGS. 11 and 12, the guide portion 70 has a first end 71 and a second end 72 that start to move away from the reference surface 12S of the second panel 12C in the Z direction.

[0062] As shown in Fig. 11, an outflow point P of the drain liquid is provided between the first end 71 and the second end 72 in the X direction. As shown in Fig. 12, the guide portion 70 has a first inclined portion 73 that is located below the first end 71 in the Z direction and inclined inward in the X direction, a second inclined portion 74 that is located below the second end 72 in the Z direction and inclined inward in the X direction, and a straight portion 75 that connects the first inclined portion 73 and the second inclined portion 74 along the X direction. That is, in this embodiment, the guide portion 70 has a trapezoidal shape that is narrower at the bottom in the Z direction than at the top.

[0063] As described above, since the guide portion 70 includes the first inclined portion 73, the drain liquid can be made to flow along the first inclined portion 73 and can be suitably collected in the drain panel 16.

[0064] Here, for example, if the guide section 70 is not provided, the drain liquid flowing out from the outflow point P flows along the second panel 12C toward the outside of the fuselage 10. In contrast, by providing the guide section 70, the guide section 70 can stop the drain liquid from flowing outward in the X direction and guide it toward the drain panel 16. In addition, the first inclined section 73 makes it easier for droplets to form in the direction of gravity, so the drain liquid can be suitably dropped onto the drain panel 16.

[0065] 8, when first panel 12B, second panel 12C, and drain panel 16 are connected by connection portion 80, connection portion 80 is positioned below second end 72 and inside the lowest point of first inclined portion 73. With this configuration, drain liquid does not drip onto connection portion 80, and deterioration of connection portion 80 can be prevented.

[0066] 2 and 10, the drain panel 16 has an opening 16H that protrudes outward in the Y direction beyond the second panel 12C in a plan view. With this configuration, the drain liquid dripping from the guide portion 70 can be collected through the opening 16H, allowing for efficient collection of the drain liquid.

[0067] As described above, the blower device 1 according to this embodiment includes a box-shaped body 10 having body inlet 11A and body outlet 12A arranged opposite each other, a first blower 20 disposed inside body 10, a second blower 30 disposed inside body 10 and positioned offset toward body outlet 12A relative to first blower 20, a chamber 40 connecting outlet 23 of first blower 20 and body outlet 12A, and gaps 50, 60 formed between chamber 40 and top and / or bottom surface 15 of body 10, allowing air to flow. With the blower device 1 configured in this manner, gaps 50, 60 allowing air to flow are formed between chamber 40 and top and / or bottom surface 15 of body 10, reducing flow resistance toward first blower 20 and second blower 30 and reducing pressure loss. Therefore, it is possible to provide a blower device 1 that can suppress a decrease in blowing performance and also accommodates a reduction in the size of the body 10.

[0068] Furthermore, chamber 40 forms a flow path through which air discharged from outlet 23 of first blower 20 reaches body outlet 12A, and the flow path area of ​​chamber 40 gradually increases from outlet 23 of first blower 20 toward body outlet 12A. According to blower device 1 configured in this manner, the flow path area gradually increases from outlet 23 of first blower 20 toward body outlet 12A, so that pressure loss in chamber 40 can be reduced.

[0069] Additionally, chamber 40 has an inclined portion 41 that slopes from exhaust port 23 of first fan 20 to body outlet 12A toward second fan 30. With blower device 1 configured in this manner, the flow of air toward the main inlet port on the bell mouth 34 side of second fan 30 can be rectified, suppressing turbulence within body 10. This makes it possible to more effectively suppress a decrease in blowing performance.

[0070] Furthermore, the side of chamber 40 opposite second blower 30 is formed to be parallel to the orthogonal direction (Y direction) perpendicular to body inlet 11A. With blower device 1 configured in this manner, the left side of chamber 40 is not blocked, and gap flows from first gap 50 and second gap 60 can be effectively circulated.

[0071] Furthermore, first fan 20 is a double-intake fan, and casing 21 of first fan 20 is disposed in contact with body inlet 11A. When viewed from the body inlet 11A side, body inlet 11A has first inlet section 11M formed on the side opposite the motor of first fan 20 and second inlet section 11N formed on the motor side. The area S1 of first inlet section 11M (body inlet opening area) is larger than half the opening area of ​​exhaust port 23 of first fan 20. With blower device 1 configured in this manner, even when taking into account the opening ratio between the main inlet on the bellmouth 24 side (see FIG. 5) and the auxiliary inlet on the motor 20M side, and the proportion of blade workload due to the position of the power transmission plate, the main suction volume can be supplemented by air flowing into the main inlet due to clearance flow.

[0072] In addition, in a plan view, the gaps 50, 60 are formed at least closer to the body outlet 12A side than the opening edge 30E on the body outlet 12A side of the suction port of the second fan 30. With the blower device 1 configured in this manner, the first gap 50 and the second gap 60 are formed in an area where the suction of the second fan 30 is small, so that a gap flow can be effectively formed.

[0073] Next, a modified example of the blower device 1 according to the above embodiment will be described.

[0074] <Variation 1> In the above-described embodiment, the blower 1 has the first gap 50 and the second gap 60. However, the blower according to the first modification may have a configuration that does not have the first gap 50 and the second gap 60. The other configurations are the same as those of the blower 1 according to the embodiment. With this configuration, the chamber 40 forms a flow path through which air discharged from the outlet 23 of the first blower 20 reaches the body outlet 12A, and the flow path area of ​​the chamber 40 gradually increases from the outlet 23 of the first blower 20 toward the body outlet 12A, thereby suppressing a decrease in blowing performance and enabling the body 10 to be made smaller.

[0075] <Variation 2> As shown in FIG. 13 , the right side of the chamber 240 of the blower device 2 according to Modification 2 is linearly configured along the Y direction. Also, as shown in FIG. 13 , the blower device 2 according to Modification 2 includes a guide member 90 arranged on the side of the chamber 240 facing the second blower 30 (the right side in the X direction) in a plan view. Similar to the inclined portion 41 of the blower device 1 according to the embodiment, the guide member 90 has a guide gap through which air flows between the top and bottom surfaces 15 of the body 10. The guide member 90 slopes from the outlet 23 of the first blower 20 toward the body outlet 12A toward the second blower 30 (the right side). The provision of the guide member 90 in this manner allows the air flow toward the bell mouth 34 (the left side in FIG. 2 ), which is the main intake port side of the second blower 30, to be rectified, thereby suppressing turbulence within the body 10. This improves blowing performance.

[0076] <Simulation> A fluid analysis simulation was carried out to examine the blowing performance of the blower according to the present invention. The results of the analysis will be described below.

[0077] The internal fan conditions of the first fan 20 and the second fan 30 are: static pressure 850 Pa, air volume 0 m 3 / h, static pressure 700Pa, air volume 2000m 3 / h, static pressure 460Pa, air volume 3000m 3 / h, static pressure 300Pa, air volume 3500m3 / h, air volume 4200m at static pressure 0Pa 3 / h was substituted into the first fan 20 and the second fan 30, respectively, to perform a simulation.

[0078] The following six items were measured. Referring to Fig. 2, <item 1> was the left suction air volume in the X direction of first fan 20 (air volume flowing into bell mouth 24), <item 2> was the right suction air volume in the X direction of first fan 20 (air volume flowing into bell mouth 25), <item 3> was the left suction air volume in the X direction of second fan 30 (air volume flowing into bell mouth 34), <item 4> was the right suction air volume in the X direction of second fan 30 (air volume flowing into bell mouth 35), <item 5> was the volumetric flow rate, and <item 6> was the inlet / outlet pressure difference.

[0079] In <Items 1 to 4>, the air volumes flowing into the bell mouths 24, 25, 34, and 35 of the first fan 20 and the second fan 30 were calculated.

[0080] <Item 5> measured the volume of fluid (air) flowing per unit time at the outlet of the blower 1. The higher the volumetric flow rate, the greater the amount of air that can be moved, meaning higher blowing performance.

[0081] In item 6, the pressure difference between the inlet and outlet was calculated. The lower the pressure difference, the less pressure loss there is within the blower, meaning higher blower performance.

[0082] Fluid analysis simulation was performed for the following five examples and comparative examples.

[0083] Example 1 A fluid analysis simulation was performed by modeling the configuration of the blower 1 according to the above-described embodiment. The model is shown in Figures 14 and 15. In this model, gaps 50 and 60 and an inclined portion 41 are formed.

[0084] <Example 2> A fluid analysis simulation was performed by modeling the configuration of the blower according to the above-described modified example 1. The model is shown in Figures 16 and 17. In this model, there are no gaps 50, 60 and an inclined portion 41 is formed.

[0085] Example 3 A fluid analysis simulation was performed by modeling a configuration to verify the effect of the guide member. The model is shown in Figures 18 and 19. A guide member 90 is formed without gaps 50 and 60. The chamber has a straight shape with no inclined portions.

[0086] <Comparative Example 1> A fluid analysis simulation was performed on a blower according to Comparative Example 1, which did not have first gap 50 or second gap 60, did not have guide member 90, and had a straight right wall of the chamber. The model is shown in Figures 20 and 21.

[0087] <Comparative Example 2> A fluid analysis simulation was performed by modeling a configuration in which the left side of the first fan 20 is closed. The model is shown in Figures 22 and 23.

[0088] The results of the fluid analysis simulation are shown in Table 1. Also, Figures 14 to 23 are diagrams showing air volume vectors on the upper and lower surfaces of the chamber when fluid analysis simulations were performed for Examples 1 to 3 and Comparative Examples 1 and 2.

[0089] [Table 1]

[0090] Here, the results of the fluid analysis simulation will be considered. First, "Example 1" and "Example 2" will be considered. The structural difference between "Example 1" and "Example 2" is the presence or absence of gaps 50, 60.

[0091] Comparing "Example 1" and "Example 2", "Example 1" is 36.79m3 / h volumetric flow rate is high, and the "left air volume of the first fan" and "right air volume of the first fan" are 74.74 m 3 / h, 48.17m 3 / h airflow is high. Furthermore, looking at the airflow vectors in "Example 1," as shown in Figures 14 and 15, it can be seen that air flows from the left air duct of the second fan 30 → the gap → the left air duct of the first fan 20 → the left air inlet of the first fan. This gap flow increases the workload of the first fan. Furthermore, the flow velocity in the negative direction is faster on the side of the outlet of the fan body in the gap than on the edge of the opening on the outlet of the fan body of the second fan's inlet. Therefore, forming a gap in this area can provide a high flow path effect.

[0092] Furthermore, when comparing "Example 1" and "Comparative Example 2", "Example 1" is 53.13m 3 / h volumetric flow rate is high. Also, the "first fan left air volume" and "first fan right air volume" are 89.98 m 3 / h, 57.93m 3 / h, the air volume is large in "Example 1." In "Comparative Example 2," it is thought that the first fan cannot perform a sufficient job because there is no air circulation due to the gap.

[0093] Next, when comparing "Example 2" and "Comparative Example 1", "Example 2" is 62.95m 3 The difference in structure between "Example 2" and "Comparative Example 1" is the inclined chamber portion, and it can be seen that the gradual expansion of the chamber portion improves the air blowing performance.

[0094] Next, when comparing "Example 3" and "Comparative Example 1", "Example 3" has a length of 77.94 m 3 / h volumetric flow rate is high. The guide members improve the airflow performance. In addition, the "second fan left side airflow" and "second fan right side airflow" are 26.67 m 3 / h, 17.05m 318 to 21, it can be seen that the air flow toward the "second fan left inlet" is rectified in "Example 3" in comparison of the air flow vectors.

[0095] The configuration of the blower device according to the present invention has been described above through embodiments and modifications, but the present invention is not limited to the above-described embodiments and modifications, and can be modified in various ways within the scope of the claims.

[0096] For example, in the above-described embodiment, the blower 1 has the first gap 50 and the second gap 60. However, the blower may have either the first gap 50 or the second gap 60.

[0097] In the above-described embodiment, the chamber section has a flow path area that gradually increases from the outlet of the first blower 20 toward the body outlet 12A, but the flow path area may be constant.

[0098] Furthermore, in the above-described embodiment, the side of the chamber portion opposite the second blower 30 side was formed to be parallel to the Y direction, but it may also be configured to be inclined with respect to the Y direction.

[0099] In the above-described embodiment, the first fan 20 is provided with a casing plate 21B, but as shown in Fig. 24, the first fan 20 does not have to be provided with a casing plate 21B. In this configuration, when viewed from the airframe body inlet 11A side, the first suction section 11M is an area covered by the side surface 11L of the airframe body inlet 11A on the side opposite to the second fan 30 side (the left side in Fig. 4) and the side surface 21L of the casing plate 21B of the casing 21 of the first fan 20 on the side opposite to the second fan 30 side (the left side in Fig. 4). In this modified example, the area of ​​the first suction section 11M can be reduced to approximately 90% of the area of ​​the first suction section 11M in the embodiment because a space for air flow is formed between the casing main plate 29 and the top and bottom surfaces of the fuselage 10.If the area is 90% or more, the main suction volume can be supplemented by the air flowing into the main suction port due to gap flow, even when taking into account the opening ratio of the main suction port on the bell mouth 24 side (see Figure 5) and the secondary suction port on the motor 20M side, and the proportion of blade work depending on the position of the power transmission plate.

[0100] Furthermore, in the above-described embodiment, the casing 21 of the first fan 20 is disposed so as to be in contact with the airframe body inlet 11A. However, as shown in FIG. 25, the casing 21 of the first fan 20 does not necessarily have to be in contact with the airframe body inlet 11A as long as it is located close to the airframe body inlet 11A. In the configuration in which the gap flow described in the above-described embodiment occurs, the positional relationship between the casing 21 of the first fan 20 and the airframe body inlet 11A shown in FIG. 25 is one embodiment in which they are located close to each other. In this configuration, as shown in FIG. 25, the first suction compartment 11M is defined by the side surface 11L of the airframe body inlet 11A opposite the second fan 30 side (the left side in FIG. 4), the left side surface of the casing plate 21B in FIG. 25, the top surface of the airframe, and the bottom surface of the airframe. That is, in the embodiment of FIG. 25, the first suction compartment 11M is defined by the airframe body components, not the side in which the airframe is viewed. More specifically, it is an area defined by lines connecting a first point where an imaginary line extending in the Z direction from the side 11L on the opposite side of the body inlet 11A from the second blower 30 side (left side in Figure 4) meets the top surface of the body, a second point where the imaginary line meets the bottom surface of the body, a third point where the end of the side of the casing plate 21B on the left side in Figure 25 closest to the body inlet meets the top surface of the body, and a fourth point where the end of the side of the casing plate 21B on the left side in Figure 25 closest to the body inlet meets the bottom surface of the body. The lengths of the lines connecting the first point and the third point and the lines connecting the second point and the fourth point, i.e., the distance between the side 11L on the side opposite the second fan 30 side of the body inlet 11A (left side in Figure 4) and the end of the left side of the casing plate 21B in Figure 25 closest to the body inlet, vary depending on the proximity between the body inlet 11A and the casing 21 of the first fan 20. The length of the line connecting the fluctuating first point and the third point (the line connecting the second point and the fourth point) can be calculated geometrically from the length of the line connecting the first point and the third point (the line connecting the second point and the fourth point) when the casing 21 of the first blower 20 is positioned so as to be in contact with the body inlet 11A, and the distance from the third point (fourth point) to the body inlet 11A when the casing 21 of the first blower 20 is positioned close to the body inlet 11A, i.e., the proximity distance.25, the length of the line connecting the fluctuating first and third points (the line connecting the second and fourth points) can be calculated in this manner to calculate the area S1 of the first suction section 11M (machine body suction inlet opening area). Even in this configuration, by ensuring that the area S1 of the first suction section 11M (machine body suction inlet opening area) is at least half the opening area S2 of the exhaust port 23 of the first fan 20, the main suction volume can be supplemented by the air flowing into the main suction inlet due to the gap flow, even when taking into account the opening ratio between the main suction inlet on the bellmouth 24 side (see FIG. 5) and the auxiliary suction inlet on the motor 20M side and the proportion of blade workload due to the position of the power transmission plate.

[0101] In the above-described embodiment, the first fan 20 is arranged along the Y direction. However, the first fan 20 may be arranged at an angle with respect to the Y direction, as shown in Fig. 26. In this configuration, when viewed from the airframe body inlet 11A side, the first suction section 11M is an area covered by the side surface 11L of the airframe body inlet 11A on the opposite side to the second fan 30 side (the left side in Fig. 4) and the side surface 21L of the casing plate 21B of the casing 21 of the first fan 20 on the opposite side to the second fan 30 side (the left side in Fig. 4). Even in this configuration, by ensuring that the area S1 of the first suction section 11M (machine suction port opening area) is at least half the opening area S2 of the exhaust port 23 of the first blower 20, the main suction volume can be supplemented by air flowing into the main suction port due to gap flow, even when taking into account the opening ratio between the main suction port on the bell mouth 24 side (see Figure 5) and the secondary suction port on the motor 20M side, and the proportion of blade work due to the position of the power transmission plate.

[0102] In the above-described embodiment, the guide portion 70 has a trapezoidal shape with a narrower bottom. However, the guide portion 170 may have a triangular shape with a vertex at the bottom, as shown in FIG. 27. Furthermore, the guide portion 270 may be formed of a convex portion that is formed in a convex shape from the reference surface 12S of the second panel 12C, as shown in FIG. 28. Furthermore, the guide portion 370 may be configured to include the guide portion 170 and the guide portion 270, as shown in FIG. 29.

[0103] Furthermore, the shape of the guide portion is not limited to the above-mentioned triangular or trapezoidal shape, but may be a circle, an ellipse, a right triangle, a mortar shape, or the like.

[0104] Furthermore, in the above-described embodiment, the entire guide portion 70 is disposed inside the drain panel 16 in the X direction, but a part of the guide portion may be disposed outside the drain panel 16 in the X direction.

[0105] 8, in the above-described embodiment, when the first panel 12B, the second panel 12C, and the drain panel 16 are connected by the connection part 80, the connection part 80 is positioned below the first end part 71 and inside the lowest point of the first inclined part 73. However, as shown in FIG. 30, when the first panel 12B, the second panel 12C, and the drain panel 16 are connected by the connection part 80, the connection part 80 may be positioned below the first end part 71 and outside the lowest point of the first inclined part 73. Even with this configuration, drain liquid does not drip onto the connection part 80, and deterioration of the connection part 80 can be prevented. [Explanation of symbols]

[0106] 1, 2, 3 blower, 10 aircraft, 11A Aircraft intake, 12A Machine outlet, 12B Panel 1, 12C 2nd panel, 12S reference plane, 15 bottom, 16 drain panel, 16H opening, 17 Duct connection port, 20 1st blower, 20M motor, 21 casing, 23 outlet; 30 second blower, 30E opening edge, 30M motor, 31 casing, 33 outlet; 40, 240 chamber section, 41 slope, 42 straight section, 50 first gap portion (gap portion), 60 second gap portion (gap portion), 70, 170, 270, 370 induction part, 71 first end; 72 second end; 73 1st slope, 74 2nd slope, 80 connection parts, 90 Guide member, P Outflow point.

Claims

1. a box-shaped body having a body inlet and a body outlet provided opposite to each other, the box-shaped body including a first wall portion in which the body inlet is formed, a second wall portion in which the body outlet is formed, a third wall portion, and a fourth wall portion disposed opposite to the third wall portion; a first fan disposed inside the fuselage; a second fan disposed inside the machine body and positioned toward the machine body outlet side relative to the first fan; a chamber portion connecting an outlet of the first blower and the body outlet; A gap formed between the chamber and the top and / or bottom surface of the body, allowing air to flow; a flow path formed between the chamber portion, a side of the first fan opposite the second fan, and the fourth wall portion, through which air can flow;

2. the chamber portion forms a flow path through which the air discharged from the outlet of the first blower reaches the body outlet, The blower device according to claim 1 , wherein the chamber portion has a flow path area that gradually increases from the outlet of the first blower toward the body outlet.

3. The blower device according to claim 2 , wherein the chamber portion has an inclined portion that slopes from the outlet of the first blower to the body discharge port toward the second blower.

4. a guide member disposed on a side surface of the chamber portion facing the second fan in a plan view; The blower device according to any one of claims 1 to 3, wherein the guide member has a guide gap portion through which the air flows between the top surface and / or the bottom surface of the body, and is inclined from the exhaust port of the first blower to the body discharge port toward the second blower.

5. The blower device according to any one of claims 1 to 4, wherein the side of the chamber portion opposite the second blower side is formed so as to be parallel to a direction perpendicular to the body intake port.

6. the first fan is a double-inlet fan including a casing shell that houses a fan, casing side walls that have a main suction port and a sub-suction port and are disposed on both sides of the fan, and a motor that is disposed on the sub-suction port side of the casing side walls, a casing of the first fan is disposed adjacent to the airframe intake port, When viewed from the aircraft intake side, The airframe suction port has a first suction compartment formed on a side opposite to the motor of the first fan and a second suction compartment formed on a side closer to the motor, The blower device according to any one of claims 1 to 5, wherein an area of ​​the first suction section is larger than half an opening area of ​​the outlet of the first blower.

7. The blower device according to any one of claims 1 to 6, wherein, in a plan view, the gap portion is formed at least closer to the body outlet side than the opening edge of the intake port of the second blower on the body outlet side.

Images