Blower device, inlet duct flange, and packaging method

Abstract

To suppress increase in packaging dimension even in an air blower having a flow divider plate, in comparison with an air blower having no flow divider plate.SOLUTION: An intake duct flange 31 comprises: a cylinder part 311 that has an intake side end part 312 in which an intake side opening 312a communicating with an intake port 20a is formed, an upstream duct side opening 313a communicating with an upstream duct, and an upstream duct side end part 313 formed to be insertable into a discharge side opening 322a of a discharge port duct flange 32 when removed from an outside casing 20; and a flow divider plate 314 that is provided inside the cylinder part 311, and is formed so that the upstream duct side end part 313 side is convex.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an inlet duct flange, a blower device, and a packaging method. [Background technology]

[0002] Conventionally, there has been a blower device that includes an outer casing having an inlet and an outlet that are connected to a duct via a duct flange, and a centrifugal blower that is housed inside the outer casing and generates an airflow that draws in air from the inlet and blows it out from the outlet. In this blower device, pressure loss occurs due to turbulence in the airflow inside the outer casing, and the volume of air blown out from the outlet can decrease.

[0003] Patent Document 1 discloses a technique for suppressing turbulence in the airflow inside the outer casing and a decrease in the amount of air blown out from the outlet by providing a flow dividing plate inside the outer casing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] WO2020 / 148905 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, when storing or transporting a blower, it is desirable to reduce the total value of the height, width, and depth of the exterior packaging, such as the packaging box, of the blower (hereinafter referred to as the packaging dimension). One method for reducing the packaging dimension is, for example, stacking the duct flanges removed from the outlet and inlet ports and inserting them into the inlet port from the opposite direction to the attachment direction of the duct flanges. However, in this case, the duct flanges interfere with the flow dividing plate provided inside the outer casing, making it impossible to insert the duct flange into the inlet port.

[0006] The present disclosure has been made to solve the problems described above, and aims to prevent the packaging dimensions of a blower device having a diversion plate from becoming larger than those of a blower device not having a diversion plate. [Means for solving the problem]

[0007] The intake duct flange of the present disclosure includes an outer casing in which an intake port for taking in air from an upstream duct and an outlet port for discharging air to a downstream duct are formed, a centrifugal blower that is housed inside the outer casing and generates an airflow that discharges the air taken in from the upstream duct through the outlet port, and The housing is removable from the outer casing. An intake duct flange for a blower, comprising: an outlet duct flange having an outlet side end portion formed with an outlet side opening communicating with an outlet, a downstream duct side opening communicating with a downstream duct, and a downstream duct side end portion formed so as to be insertable into an intake when removed from an outer casing, The housing is removable from the outer casing. The device is provided with a cylindrical portion having an intake side end portion formed with an intake side opening communicating with the intake port, an upstream duct side opening communicating with the upstream duct, and an upstream duct side end portion formed so as to be insertable into the discharge side opening of the discharge port duct flange when removed from the outer casing, and a flow dividing plate provided inside the cylindrical portion and formed so that the upstream duct side end portion is convex. When the cylindrical portion is removed from the outer casing, the It is characterized by: Effect of the Invention

[0008] According to the present disclosure, even in a blower device having a flow dividing plate, it is possible to prevent the packaging dimensions from becoming larger than in a blower device not having a flow dividing plate. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a blower device according to an embodiment. [Diagram 2] 2 is a cross-sectional view of the blower device shown in FIG. 1, as viewed in the direction indicated by arrow A1. [Diagram 3] FIG. 2 is a diagram showing the configuration of an inlet duct flange and an outlet duct flange. [Figure 4] FIG. 4 is a flow chart showing a procedure for packaging the blower device. [Diagram 5] FIG. 11 is a diagram comparing the packaging dimensions of the air blower and the air blower. [Figure 6] FIG. 11 is a diagram showing a configuration of a blower device according to a second embodiment. [Figure 7] FIG. 11 is a diagram showing a configuration of a blower device 1 according to a third embodiment. [Figure 8] FIG. 11 is a diagram showing a configuration of a blower device 1 according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a blower device according to an embodiment of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiment described below. The configuration shown in the embodiment shows an example of the contents of the present invention, and it is possible to combine it with another known technology, and it is also possible to omit or change a part of the configuration without departing from the gist of the present invention.

[0011] Embodiment 1 FIG. 1 is a perspective view of a blower 1 according to the first embodiment. The blower 1 according to the first embodiment is connected to a duct (upstream duct D1) provided on the upstream side of the air passage as viewed from the blower 1 via an inlet duct flange 31. The blower 1 is also connected to a duct (downstream duct D2) provided on the downstream side of the air passage as viewed from the blower 1 via an outlet duct flange 32. The blower 1 is installed in a space such as the ceiling of a building while connected to the upstream duct D1 and the downstream duct D2. The blower 1, for example, generates an airflow that takes in indoor air from the upstream duct D1 into the inside of the outer casing 20 and expels the air to the downstream duct D2.

[0012] Next, the configuration of the blower 1 will be described. FIG. 2 is a cross-sectional view of the blower 1 shown in FIG. 1, as viewed in the direction indicated by the arrow A1. The blower 1 includes an outer casing 20, an outlet duct flange 32, an inlet duct flange 31, and a centrifugal blower .

[0013] The outer casing 20 is a housing, and has an inlet 20a for taking in air into the housing and an outlet 20b for expelling air to the outside of the housing formed on opposing sides. The outer casing 20 houses a centrifugal blower 40.

[0014] The centrifugal blower 40 is housed inside the outer casing 20, and generates an air flow that draws in air from the inlet 20a of the outer casing 20 and discharges it from the outlet 20b. The centrifugal blower 40 has a fan 41, a motor 42, and a scroll casing 43. The fan 41 is, for example, a sirocco fan, and rotates about a rotation axis X by the driving force of the motor 42. The motor 42 is provided in the axial direction of the rotation axis X of the fan 41. The scroll casing 43 houses the motor 42 and the fan 41. The scroll casing 43 may house only a part of the motor 42. The scroll casing 43 is formed to surround the fan 41, and includes a pair of side walls 431, 432 that cover the fan 41 from the axial direction of the rotation axis X, and a peripheral wall 433 that covers the fan 41 from the radial direction of the rotation axis X. An air intake 431a is formed in the side wall 431. An intake port 432a is formed in the side wall 432. An outlet port 433a communicating with the outlet port 20b of the outer casing 20 is formed in the peripheral wall 433.

[0015] As the fan 41 rotates, the centrifugal blower 40 draws in air from an intake port 431a of a side wall 431 provided in the axial direction of the rotation axis X of the fan 41 and an intake port 432a of a side wall 432. The centrifugal blower 40 also discharges the drawn air from an outlet 433a (discharge port 20b of the outer casing 20) of a peripheral wall 433 provided in the radial direction of the rotation axis X of the fan 41.

[0016] The discharge port duct flange 32 has a hollow cylindrical portion 321. The cylindrical portion 321 has a discharge side end portion 322 and a downstream duct side end portion 323. The discharge side end portion 322 has a discharge side opening 322a formed therein that communicates with the discharge port 20b when installed. The downstream duct side end portion 323 has a downstream duct side opening 323a formed therein that communicates with the downstream duct D2 when installed.

[0017] The inlet duct flange 31 has a hollow cylindrical portion 311 and a flow dividing plate 314. The cylindrical portion 311 has an inlet side end portion 312 and an upstream duct side end portion 313. The inlet side end portion 312 is formed with an inlet side opening 312a that communicates with the inlet 20a when installed. The upstream duct side end portion 313 is formed with an upstream duct side opening 313a that communicates with the upstream duct D1 when installed.

[0018] The flow dividing plate 314 is provided inside the tubular portion 311, and is formed so as to be convex on the upstream duct side end portion 313 side. The flow dividing plate 314 divides the airflow AC1 that has flowed from the upstream duct D1 into the inlet duct flange 31, along an inclination with the convex portion as the apex, into an airflow AC11 that flows toward the air intake 431a of the side wall 431, and an airflow AC12 that flows toward the air intake 432a of the side wall 432.

[0019] By including the flow dividing plate 314, the blower device 1 can rectify the airflow inside the outer casing 20, compared to a case where the blower device 1 does not include the flow dividing plate 314. The rectifying effect of the flow dividing plate 314 is maintained until the airflow passes through the flow dividing plate 314 and is sucked into the air intake port 431a of the side wall 431 or the air intake port 432a of the side wall 432. This suppresses separation of the airflow inside the outer casing 20 and the generation of vortexes (reduced pressure loss), and as a result, the blower device 1 can suppress a decrease in the amount of air blown out from the discharge port 20b.

[0020] FIG. 3 is a diagram showing the configuration of the inlet duct flange 31 and the outlet duct flange 32. As shown in FIG. The downstream duct side end 323 of the discharge port duct flange 32 is formed to be narrower than the inlet 20a. As a result, the downstream duct side end 323 of the discharge port duct flange 32 is formed so as to be insertable into the inlet 20a when removed from the outer casing 20.

[0021] Additionally, the upstream duct side end 313 of the inlet duct flange 31 is formed to be narrower than the inlet 20a and the discharge side opening 322a of the discharge duct flange 32. As a result, the upstream duct side end 313 of the inlet duct flange 31 is formed so as to be insertable into the inlet 20a and the discharge side opening 322a of the discharge duct flange 32 when removed from the outer casing 20.

[0022] FIG. 4 is a flow diagram showing a procedure for packaging the air blower 1. As shown in FIG. An operator inserts the downstream duct side end 323 of the discharge port duct flange 32 into the inlet 20a of the outer casing 20 (step ST1). In addition, an operator inserts the upstream duct side end 313 of the inlet duct flange 31 into the discharge side opening 322a of the discharge port duct flange 32 (step ST2). In this embodiment, the work is performed in the order of step ST1 and step ST2, but the work may be performed in the order of step ST2 and step ST1.

[0023] FIG. 5 is a diagram comparing the packaging dimensions of the air blower 1 and the air blower 1. In FIG. Fig. 5(1) shows the packaging dimension W1 when the blower 1 is packaged. Fig. 5(2) shows the packaging dimension W2 when the blower 1 is installed. When packaged, the blower 1 does not have a flow dividing plate inside the outer casing 20, so that the downstream duct side end 323 of the outlet duct flange 32 and the upstream duct side end 313 of the inlet duct flange 31 can be inserted into the inlet 20a of the outer casing 20. This allows the packaging dimension of the blower 1 to be smaller than when the blower 1 is not inserted into the inlet 20a of the outer casing 20 (Fig. 5(2)).

[0024] As described above, the air blower 1 is configured to have the flow dividing plate 314 inside the inlet duct flange 31, so that the downstream duct side end 323 of the outlet duct flange 32 and the upstream duct side end 313 of the inlet duct flange 31 can be inserted into the inlet 20a of the outer casing 20. As a result, even if the air blower 1 has the flow dividing plate 314, the packaging dimensions can be suppressed from being large compared to the air blower 1 that does not have the flow dividing plate 314. Furthermore, in the air blower 1, the flow dividing plate 314 does not protrude outside the inlet duct flange 31. As a result, even if the air blower 1 has the inlet duct flange 31 inserted into the inlet 20a of the outer casing 20, the flow dividing plate 314 does not protrude outside the inlet duct flange 31, so that the packaging dimensions of the air blower 1 can be reduced.

[0025] Embodiment 2 In the first embodiment, the flow dividing plate 314 is provided inside the inlet duct flange 31. However, the flow dividing plate 314 only needs to be movable inside the inlet duct flange 31 when packaged, and may be provided movably outside the inlet duct flange 31 when installed.

[0026] FIG. 6 is a diagram showing a configuration of the blower 1 according to the second embodiment. FIG. 6(1) is a diagram showing the inlet duct flange 31 when the blower 1 is installed. The airflow dividing plate 314 of the inlet duct flange 31 is provided rotatably around the shaft 315. The shaft 315 is provided at a position closer to the intake end 312 than the upstream duct end 313 inside the tube portion 311. When the blower 1 is installed, the airflow dividing plate 314 is moved so that the upstream side of the airflow, i.e., the upstream duct end 313 side, is convex. The airflow dividing plate 314 is also moved so that a part of it is located outside the tube portion 311. This enables the blower 1 to suppress the resistance of the airflow passing through the inside of the tube portion 311 (reducing pressure loss), and as a result, the decrease in the amount of air blown out from the discharge port 20b can be suppressed.

[0027] FIG. 6(2) is a diagram showing the inlet duct flange 31 when the blower 1 is packaged. When the air blower 1 is stored, the airflow dividing plate 314 is moved and installed so that the entirety of the air blower 1 is located inside the tube portion 311. As a result, even though the air blower 1 has an airflow dividing plate, the packaging dimensions can be prevented from becoming larger than those of an air blower that does not have an airflow dividing plate.

[0028] Embodiment 3 In embodiment 2, the flow dividing plate 314 is composed of a single member that is rotatable around an axis 315 provided inside the cylindrical portion 311 of the inlet duct flange 31, but it may also be composed of two members (e.g., plates).

[0029] FIG. 7 is a diagram showing a configuration of a blower 1 according to the third embodiment. The flow dividing plate 314 is composed of a first plate 314a and a second plate 314b that can rotate independently around the shaft 315. When installed, the first plate 314a is provided so that an intersection K1 between the side wall 431 and the peripheral wall 433 is located on an extension of the first plate 314a. The second plate 314b is provided so that an intersection K2 between the side wall 432 and the peripheral wall 433 is located on an extension of the second plate 314b. With this configuration, the intake port duct flange 31 can reduce pressure loss and, as a result, suppress a decrease in the amount of air blown out from the discharge port 20b even when the intake port duct flange 31 is used in a blower device 1 having different positional relationships between the shaft 315 and the intake port 431a and between the shaft 315 and the intake port 432a.

[0030] Embodiment 4 In embodiment 1, the inlet duct flange 31 has the function of diverting the airflow flowing in from the upstream duct D1 using the flow diverter plate 314, but it may also have the function of suppressing the airflow flowing in from the outer casing 20, i.e., backflow.

[0031] FIG. 8 is a diagram showing a configuration of a blower 1 according to the fourth embodiment. The inlet duct flange 31 has a flow dividing plate 314 formed in a size capable of being inscribed in the inner wall of the cylindrical portion 311, and a shaft 315. The flow dividing plate 314 is composed of a first plate 314a and a second plate 314b that are independently rotatable about the shaft 315.

[0032] 8(2), when a backflow of air occurs, the force of the backflowing air causes the flow dividing plate 314 (first plate 314a and second plate 314b) to rotate about shaft 315 and be pressed against the inner wall of the tubular portion 311. The inlet duct flange 31 has the first plate 314a and second plate 314b inscribed in the inner wall of the tubular portion 311, thereby suppressing the backflow of air.

[0033] On the other hand, when the blower 1 is operating, as shown in Fig. 8 (1), the force of the airflow causes the airflow dividing plate 314 (first plate 314a and second plate 314b) to rotate about the axis 315 and move to the upstream side of the airflow, i.e., to a position where the upstream duct side end 313 becomes convex. The inlet duct flange 31 straightens the airflow with the first plate 314a and second plate 314b, thereby reducing pressure loss and, as a result, suppressing a decrease in the amount of air blown out from the outlet 20b. [Explanation of symbols]

[0034] 1 blower, 20 outer casing, 20a intake, 20b discharge, 31 intake duct flange, 311 tube portion, 312 intake side end, 312a intake side opening, 313 upstream duct side end, 313a upstream duct side opening, 314 flow dividing plate, 314a first plate, 314b second plate, 315 shaft, 32 discharge duct flange, 321 tube portion, 322 discharge side end, 322a discharge side opening, 323 downstream duct side end, 323a downstream duct side opening, 40 centrifugal blower, 41 fan, 42 motor, 43 scroll casing, 431 side wall, 431a intake, 432 side wall, 432a intake, 433 peripheral wall, 433a blowing outlet.

Claims

1. an outer casing having an intake port for taking in air from the upstream duct and an exhaust port for discharging air to the downstream duct; a centrifugal blower that is housed inside the outer casing and generates an airflow that discharges the air taken in through the upstream duct from the discharge port; a discharge port duct flange that is detachably provided from the outer casing and has a discharge side end portion formed with a discharge side opening communicating with the discharge port, a downstream duct side opening communicating with the downstream duct, and a downstream duct side end portion formed so as to be insertable into the inlet when removed from the outer casing; An intake duct flange for a blower comprising: a cylindrical portion that is detachably provided from the outer casing and has an intake side end portion formed with an intake side opening communicating with the intake port, an upstream duct side opening communicating with the upstream duct, and an upstream duct side end portion formed so as to be insertable into the discharge side opening of the discharge port duct flange when removed from the outer casing; a flow dividing plate provided inside the cylindrical portion, the upstream duct side end side being formed to be convex, and the flow dividing plate not protruding outside the cylindrical portion when the cylindrical portion is removed from the outer casing; An intake duct flange comprising:

2. The flow dividing plate is The housing is formed so as to be rotatable about an axis provided inside the cylindrical portion and to be able to be stored inside the cylindrical portion when removed from the outer casing. The inlet duct flange of claim 1 .

3. The flow dividing plate is The shaft is formed so as to be capable of rotating about an axis provided inside the cylindrical portion and being inscribed in the cylindrical portion.

3. The inlet duct flange according to claim 1 or 2.

4. an outer casing having an intake port for taking in air from the upstream duct and an exhaust port for discharging air to the downstream duct; a centrifugal blower that is housed inside the outer casing and generates an airflow that discharges the air taken in through the upstream duct from the discharge port; a discharge port duct flange that is detachably provided from the outer casing and has a discharge side end portion formed with a discharge side opening communicating with the discharge port, a downstream duct side opening communicating with the downstream duct, and a downstream duct side end portion formed so as to be insertable into the inlet when removed from the outer casing; an intake duct flange including a cylindrical portion which is detachably provided from the outer casing and has an intake side end portion formed with an intake side opening communicating with the intake, an upstream duct side opening communicating with the upstream duct, and an upstream duct side end portion formed so as to be insertable into the discharge side opening of the discharge duct flange when removed from the outer casing; and a flow dividing plate which is provided inside the cylindrical portion and is formed so that the upstream duct side end portion is convex and does not protrude outside the cylindrical portion when the cylindrical portion is removed from the outer casing; A blower device comprising:

5. An outer casing having an intake port for taking in air from an upstream duct and an exhaust port for discharging air to a downstream duct; a centrifugal blower that is housed inside the outer casing and generates an airflow that discharges the air taken in through the upstream duct from the discharge port; a discharge port duct flange having a discharge side end portion formed with a discharge side opening communicating with the discharge port, a downstream duct side opening communicating with the downstream duct, and a downstream duct side end portion formed so as to be insertable into the inlet when removed from the outer casing; A packaging method for packaging a blower device comprising: an intake port duct flange having an intake side end portion formed with an intake side opening communicating with the intake port, an upstream duct side opening communicating with the upstream duct, and a tubular portion having an upstream duct side end portion formed so as to be insertable into the discharge side opening of the discharge port duct flange when removed from the outer casing; and a flow dividing plate provided inside the tubular portion and formed so that the upstream duct side end portion is convex, The downstream duct end of the outlet duct flange is inserted into the inlet. a flange insertion step; The upstream duct side end of the intake duct flange is connected to the upstream duct side end of the discharge duct flange. an inlet duct flange insertion step for inserting into the discharge side opening; A method for packaging a blower device, comprising:

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