JP2018193958A - Blower - Google Patents

Abstract

A blower capable of reducing the external dimensions of a product and reducing the size is obtained. A main body box having a main body exhaust port formed on one side surface and a main body intake port formed on any other side surface, and a first suction port having a side surface perpendicular to the one side surface. And a centrifugal fan 30 having a fan 4 provided opposite to the second suction port, and a motor 1 provided on the first suction port side to drive the fan 4, and connected to the motor 1 and an external power source. And a terminal block 13 provided inside the main body box. [Selection] Figure 2

Description

  The present invention relates to a blower device in which a centrifugal blower is incorporated in a box.

  A blower equipped with a centrifugal blower may be used as a blower installed in a space behind a ceiling or a wall of a building to ventilate a room. A blower equipped with a centrifugal blower generally has a fan and a motor that drives the fan. A blower equipped with a centrifugal blower generally has a structure in which a double-suction centrifugal blower having suction ports on both sides of the fan casing, that is, the motor side and the fan side, is incorporated in the outer casing. doing.

  In recent years, for example, an effective space such as a living room space has been expanded, and in an air blower, a reduction in installation space is required. For this reason, while the miniaturization of the main body of an air blower is calculated | required, higher output and noise reduction are also calculated | required.

  In general, power supply to the motor in the above-described blower is performed from a terminal block provided outside the outer casing, and the terminal block is covered with a metal or resin electrical box that can be opened and closed. Patent Literature 1 discloses a blower device in which an electrical box having components such as a terminal block, a capacitor, and an abnormality detection relay are attached to the outside of the machine body.

JP 2013-221721 A

  However, in the blower described in Patent Document 1, since the electrical box is attached to the outside of the fuselage, the dimension obtained by adding the dimension of the electrical box to the dimension of the fuselage is the outermost dimension of the blower, The actual product external dimensions were larger than the dimensions of the fuselage.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the air blower which can be reduced in size by reducing a product external dimension.

  In order to solve the above-described problems and achieve the object, the present invention provides a main body box having a main body exhaust port formed on one side surface and a main body intake port formed on any other side surface, and one side surface. A centrifugal blower having a fan having a side surface forming a right angle and provided with a first suction port and a second suction port facing each other, and a motor provided on the first suction port side to drive the fan; A terminal block connected to the motor and an external power source and provided inside the main body box.

  According to the present invention, it is possible to obtain an air blower that can be reduced in size by reducing the outer dimensions of the product.

The perspective view which shows the external appearance of the air blower concerning Embodiment 1 of this invention. It is sectional drawing of the air blower concerning Embodiment 1 of this invention, and the longitudinal cross-sectional view along line II-II in FIG. Airflow analysis sectional view analyzing the flow velocity of the airflow that flows inside a general blower in which the electrical box protecting the terminal block and its power supply section is arranged outside the outer casing It is sectional drawing of the other air blower concerning Embodiment 1 of this invention, and is a figure which shows the example arrange | positioned in the state which the shielding board inclined with respect to the lower surface of an outer side casing

  Below, the air blower concerning embodiment of this invention is demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments. Moreover, in the following drawings, the relationship of the size of each component may be different from the actual one.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing an appearance of the blower 50 according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of the blower device 50 according to the first embodiment of the present invention, and is a vertical cross-sectional view taken along line II-II in FIG. The arrows in FIG. 2 indicate air paths described later. The blower device 50 according to the first embodiment is installed in a space such as the back of a ceiling of a building, and a duct provided on the back of the ceiling is attached to the duct connection component 9 to suck in indoor air and exhaust it to the outside for ventilation. I do.

  In the blower device 50 according to the first embodiment, a fan casing 2 is housed in an outer casing 3 having a rectangular parallelepiped shape that is a main body box that forms an outline of the blower device 50. The air blower 30 is installed.

  The outer casing 3 has a main body exhaust port 6 formed on one side surface and a main body intake port 5 formed on any other side surface. In FIG. 1, the outer casing 3 is provided with a main body inlet 5 on one side of two side faces opposed in the longitudinal direction and a main body outlet 6 on the other side. The main body intake port 5 is provided with a duct connection component 9a which is a duct connection component 9 for intake air. The main body exhaust port 6 is provided with a duct connection part 9b which is an exhaust duct connection part 9. A duct (not shown) provided on the back of the ceiling is connected to the duct connecting component 9a and the duct connecting component 9b.

  The outer casing 3 includes a fan-side intake air passage 18a that connects the main body intake port 5 and an anti-motor side intake port 4b described later, and a main body intake port 5 and a motor-side intake port 4a described later. And a motor-side intake air passage 18b to be connected. Further, the outer casing 3 has an exhaust air passage 21 that connects an exhaust port 17 and a main body exhaust port 6 described later, which is an exhaust air passage.

  The centrifugal blower 30 includes a motor 1 and a double-suction fan 4 including multi-blade centrifugal blades attached to an output shaft (not shown) of the motor 1. The fan 4 has a side surface perpendicular to one side surface of the outer casing 3 in which the main body exhaust port 6 is formed. The fan 4 includes a motor side suction port 4a that is a first suction port provided on the motor 1 side, and a counter motor side that is a second suction port provided in the fan 4 so as to face the motor side suction port 4a. This is a double-suction fan provided opposite to the suction port 4b.

  The fan casing 2 has a scroll-shaped fan-side fan casing 2a having a fan-side intake port 7 and disposed on the fan 4 side, and a scroll-shaped fan-side fan casing 2a disposed on the motor 1 side having a motor-side intake port 8. And a motor-side fan casing 2b. The fan casing 2 includes an exhaust port 17 formed by the fan side fan casing 2a and the motor side fan casing 2b.

  The centrifugal blower 30 is installed in the fan casing 2 such that a part of the motor 1 and the fan 4 are surrounded by the fan side fan casing 2a and the motor side fan casing 2b. The motor 1 is located inside the motor side air inlet 8. The output shaft direction of the motor 1 is a direction perpendicular to the upper surface 3a and the lower surface 3b, which are a pair of side surfaces facing each other in the outer casing 3, and corresponds to the X direction in FIG. The fan side air inlet 7 and the motor side air inlet 8 face each other in the output shaft direction of the motor 1.

  The centrifugal blower 30 is disposed so as to be offset toward the exhaust port 17 side of the outer casing 3 so that the fan 4 rotates horizontally. Further, power to the motor 1 is supplied via a terminal block 13 provided in the outer casing 3 connected to the motor 1 and an external power source (not shown). The terminal block 13 is connected to electric wires such as a motor power line 16 drawn from the motor 1 and a cabtyre cable drawn from an external power source. The centrifugal blower 30 may be disposed so as to be offset toward the exhaust port 17 side of the outer casing 3 so that the fan 4 rotates vertically.

  As shown in FIG. 2, the terminal block 13 is provided inside the outer casing 3 so that the main body exhaust port 6 is located on the lower surface 3 b of the outer casing 3, which is the other side connected to the surface provided with the main body exhaust port 6. It is arranged in the side space. That is, the terminal block 13 is a space adjacent to the corner on the downstream side in the air flow direction from the main body intake port 5 toward the main body exhaust port 6 inside the outer casing 3, and is separated from the motor side intake air passage 18b. It is arranged in the windless space 12 that is the separated space.

  The windless space 12 is formed by arranging the shielding plate 14. As shown in FIG. 2, the shielding plate 14 is attached to the motor 1 side of the terminal block 13 inside the outer casing 3. That is, the shielding plate 14 is, like the terminal block 13, the main body exhaust port more than the motor 1 on the lower surface 3 b of the outer casing 3, which is a surface connected to the surface provided with the main body exhaust port 6. 6 side is arranged. The shield plate 14 has one end connected to the lower surface 3b of the outer casing 3, the other end connected to the motor-side fan casing 2b, and is provided perpendicular to the lower surface 3b of the outer casing 3 facing the motor 1. ing. That is, the shielding plate 14 is attached in parallel to the output shaft of the motor 1. And the shielding board 14 and the motor side fan casing 2b are arrange | positioned over the full width of the width direction of the outer side casing 3, ie, the paper surface depth direction in FIG. Therefore, the shielding plate 14 is arranged on the main body exhaust port 6 side of the motor 1 so as to close the motor-side intake air passage 18b.

  The material of the shielding plate 14 is not particularly limited. However, it is preferable to ensure the strength by using a material such as a metal plate or resin having the same degree of rigidity as the outer casing 3 in consideration of the ability to insert and remove the cabtyre cable into the terminal block 13.

  The noise source in the blower 50 is the centrifugal blower 30 including the motor 1 and the fan 4 that are driving units. For this reason, the porous sound-absorbing component 10 made of a material such as glass wool is attached to the tip 2c on the upstream side of the fan casing 2 to reduce noise. Further, the porous sound absorbing component 10 may be further attached to the inner surface of the centrifugal blower 30 or the outer casing 3. Thereby, noise can be further reduced. Moreover, the porous sound-absorbing component 10 has a feature that it becomes an air passage because the component itself allows air to pass therethrough.

  When the air blower 50 is in operation, the fan 4 is driven by the motor 1, so that the main body inlet of the outer casing 3 is passed through the duct by the rotation of the double-suction fan 4 as shown by the arrow 20 in FIG. 5 is taken into the blower 50. The air taken into the blower 50 is branched in two directions by the porous sound absorbing component 10 and passes through the fan-side intake air passage 18a and the motor-side intake air passage 18b formed in the outer casing 3, respectively. From the fan side air inlet 7 and the motor side air inlet 8 of the centrifugal blower 30, the air is sucked into the fan 4 and merges. Thereafter, the merged air is discharged from the exhaust port 17 of the fan casing 2, blown from the main body exhaust port 6 of the outer casing 3 through the exhaust air passage 21, and discharged to the outside from the duct. Therefore, the blower 50 has a feature that the path from the intake air to the exhaust gas is linear.

  FIG. 3 is a cross-sectional view of the air flow analysis in which the flow velocity of the air flow flowing inside a general air blower in which the electrical box protecting the terminal block 13 and its power supply unit is arranged outside the outer casing 3 is analyzed. The cross section shown in FIG. 3 corresponds to the cross section of FIG. In FIG. 3, the same members as those of the blower device 50 are denoted by the same reference numerals.

  In a general air blower in which an electrical box, which is a protective part for protecting the terminal block and its power supply unit, is disposed outside the outer casing, the electrical box is disposed outside the outer casing. The dimension which added the dimension of the electrical equipment box to the dimension became the outermost dimension as the blower, and the substantial outer dimension of the main body of the blower was larger than the dimension of the outer casing.

  Further, as shown in FIG. 3, in the motor-side intake air passage 18 b on the motor 1 side, less air passes through the corner region 31 on the exhaust port 17 side than the motor 1. For this reason, the wind speed of the air which passes through the area | region 31 of a corner part becomes non-uniform | heterogenous, and it becomes a cause of noise deterioration because the whirlpool of air generate | occur | produces. That is, the corner region 31 not only does not easily function as an air path in the blower 50, but also contributes to noise deterioration due to the difference in velocity of the airflow and the generation of vortex. Here, the corner region 31 corresponds to the space adjacent to the corner on the downstream side in the air flow direction from the main body intake port 5 toward the main body exhaust port 6 in the outer casing 3 described above.

  On the other hand, in the blower device 50, as shown in FIG. 2, the space corresponding to the corner region 31 is partitioned by the shielding plate 14, so that the air to the corner region 31 where air eddy current tends to occur is generated. The inflow is blocked and a windless space 12 is formed. And the terminal block 13 is arrange | positioned in the windless space 12, and the outer casing is not provided.

  Thereby, in the air blower 50, the substantial main body outer dimensions of the air blower become the outer dimensions of the outer casing 3, and the electrical equipment is compared with the case where the electrical box that houses the terminal block 13 is disposed outside the outer casing. The size of the outer casing 3 can be reduced by reducing the outer dimension of the outer casing 3 by the size of the box. That is, in the blower device 50, the space inside the blower device 50 can be effectively used by housing the terminal block 13 in the outer casing 3, and the blower device 50 can be reduced in size by omitting the electrical box.

  Further, in the blower device 50, the inflow of air into the corner region 31 where air eddy current is likely to occur is blocked by the shielding plate 14, and the generation of air eddy current generated in the corner region 31 is suppressed, Noise of the blower 50 can be suppressed. That is, preventing the inflow of air into a space that is difficult to function as an air passage in the blower device 50 leads to a rectifying effect, and the air blowing performance due to the pressure difference between the fan-side intake air passage 18a and the motor-side intake air passage 18b. Is suppressed, and it is possible to reduce the pressure loss of the airflow passing through the motor-side intake air passage 18b on the motor 1 side and the vortex of the airflow, and the noise value generated in the motor-side intake air passage 18b on the motor 1 side can be reduced. Can be reduced. In order to obtain the rectification effect and the noise value reduction effect to the maximum, it is preferable that the non-wind space 12 is completely separated from the motor-side intake air passage 18b, but the non-wind space 12 is completely separated from the motor-side intake air. Even when the air passage 18b is not separated, the rectifying effect and the noise value reducing effect can be obtained.

  Further, the outer casing 3 also serves as an electrical box or electrical cover that is a protective component for protecting the terminal block 13. Thereby, in the air blower 50, manufacture and attachment of an electrical equipment box or an electrical equipment cover become unnecessary, and the cost of the air blower 50 can be reduced.

  FIG. 4 is a cross-sectional view of another blower 51 according to the first embodiment of the present invention, and shows an example in which the shielding plate 14 is disposed in an inclined state with respect to the lower surface 3b of the outer casing 3. . Although FIG. 2 shows the case where the shielding plate 14 is provided perpendicular to the lower surface 3b of the outer casing 3 facing the motor 1, the arrangement of the shielding plate 14 is not limited to this. As shown in FIG. 4, the shielding plate 14 sucks air from the main body inlet 5 of the outer casing 3 through the motor-side intake air passage and hits the shielding plate 14 with respect to the lower surface 3 b of the outer casing 3. You may provide with the inclination which guides to the motor side suction inlet 4a which is a suction inlet of the fan 4. FIG. That is, the shielding plate 14 guides the air sucked from the main body inlet 5 of the outer casing 3 and hitting the shielding plate 14 to the motor-side inlet 8 of the motor-side fan casing 2 b with respect to the lower surface 3 b of the outer casing 3. It may be provided with an inclination. Also in this case, the shielding plate 14 is disposed on the main body exhaust port 6 side of the motor 1 so as to close the motor-side intake air passage 18b.

  As shown in FIG. 4, the mounting angle of the shielding plate 14 with respect to the lower surface 3 b of the outer casing 3 in the direction in which the air hitting the shielding plate 14 is guided to the motor side suction port 4 a, that is, the shielding plate 14 with respect to the lower surface 3 b of the outer casing 3. By changing the inclination angle, the shielding plate 14 can have a rectifying effect. In this case, the inclination angle and the base point of the shielding plate 14 are not particularly limited, but it is necessary to satisfy the conditions for forming the windless space 12 by arranging the shielding plate 14.

  Further, the case where the shielding plate 14 is arranged with the edge of the motor-side intake port 8 of the motor-side fan casing 2b closer to the main body exhaust port 6 than the motor 1 as the base point is the case where the largest windless space 12 is taken. In consideration of pressure loss, it is preferable that the inclination angle is set in a range that does not interfere with the motor 1.

  As described above, in the blower device 50 according to the first embodiment, the space that does not function as the air path on the motor 1 side is divided by the shielding plate 14 to form the windless space 12, and the terminal block 13 is disposed in the windless space 12. Is done. And in the air blower 50, the outer casing 3 serves also as the electrical equipment box or electrical equipment cover which is a protection component which protects the terminal block 13. FIG. Accordingly, the terminal block 13 is accommodated in the outer casing 3 by effectively utilizing the inside of the outer casing 3 and an electric box or an electric cover is not required, and the power supply to the motor 1 is realized while reducing the size of the blower 50. Supply becomes possible.

  In the air blowers 50 and 51 according to the first embodiment, since the generation of air eddy currents generated in the corner region 31 by the shielding plate 14 can be suppressed or prevented, the air blowing performance is improved and the noise is suppressed. Can do. Furthermore, since the outer casing 3 also serves as a protective component that protects the terminal block 13, it is not necessary to provide a protective component that protects the terminal block 13, making it unnecessary to manufacture and attach the protective component, and to reduce the cost of the blower 50. Can be reduced.

  Therefore, in the air blowers 50 and 51 according to the first embodiment, the air blower capable of reducing the size, improving the air blowing performance, and suppressing the noise by effectively utilizing the inside of the outer casing 3. Is obtained.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  1 motor, 2 fan casing, 2a fan side fan casing, 2b motor side fan casing, 2c tip, 3 outer casing, 3a top surface, 3b bottom surface, 4 fan, 4a motor side suction port, 4b anti-motor side suction port, 5 body Air intake port, 6 Main body exhaust port, 7 Fan side air intake port, 8 Motor side air intake port, 9 Duct connection component, 9a Duct connection component, 9b Duct connection component, 10 Porous sound absorption component, 12 No wind space, 13 Terminal block, 14 Shield plate, 16 Motor power line, 17 Exhaust port, 18a Fan side intake air path, 18b Motor side intake air path, 20 Air flow, 21 Exhaust air path, 30 Centrifugal blower, 31 Corner area, 50, 51 apparatus.

Claims (7)

A main body box having a main body exhaust port formed on one side surface and a main body air inlet port formed on any other side surface;
A fan having a side surface perpendicular to the one side surface and provided with a first suction port and a second suction port facing each other; and a motor provided on the first suction port side to drive the fan. A centrifugal blower having,
A terminal block connected to the motor and an external power source and provided inside the main body box;
The air blower characterized by comprising. The terminal block is disposed in the body exhaust port side of the motor inside the main body box;
The air blower according to claim 1. The terminal block is disposed inside the main body box on the other side surface connected to the side surface provided with the main body exhaust port,
The air blower according to claim 2. In the main body box, a shielding plate is provided that forms a separation space separated from the motor-side intake air passage connected from the main body intake port to the first intake port closer to the main body exhaust port than the motor. about,
The air blower according to claim 3. The shielding plate is provided perpendicular to the other side surface;
The air blower according to claim 4. The shielding plate is provided with an inclination to guide the air hitting the shielding plate through the motor-side intake air passage to the first suction port with respect to the other side surface;
The air blower according to claim 4. The terminal block is disposed in the separation space;
The air blower according to any one of claims 4 to 6, wherein:

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