JP2017057772A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blower in which displacement of a mouse is suppressed when a resin bell mouth in which two bell mouths are arranged in parallel is subjected to external force.SOLUTION: The blower 16 includes: a fan 17 including a first fan 17A and a second fan 17B arranged in parallel with the first fan 17A; and the bell mouth 20 formed of a resin material and including a first mouse 21A surrounding a periphery of the first fan 17A and a second mouse 21B surrounding a periphery of the second fan 17B. The first mouse 21A and the second mouse 21B come into contact with each other at their parts facing each other when being subjected to external force and displaced.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a blower, and more particularly to a blower including a resin bell mouth.

The air conditioner includes an indoor unit that exchanges heat between indoor air and an outdoor unit that dissipates heat from the outside air or absorbs heat from the outside air and includes a blower. The blower includes a fan and a bell mouth that surrounds the fan and blows air.
The bell mouth of the blower is made of metal or resin.
A metal bell mouth is high in rigidity, so it is less likely to be deformed by an external force such as a snow load or a wind load. However, the degree of freedom in shape is low due to processing limitations.
On the other hand, a plastic bell mouth can be formed by injection molding, so the degree of freedom of shape is high, but it is less rigid than metal, so it deforms in the direction of gravity when there is snow, for example, and external force is applied. There is a risk. When the bell mouth is deformed, the clearance between the bell mouth and the fan changes, and the performance as an outdoor unit may be reduced.

  In view of this, the inventor disclosed in Patent Document 1 has a first fan and a second fan arranged in parallel, and a first mouse surrounding the periphery of the first fan and a second mouse surrounding the periphery of the second fan. Proposes a blower in which parts facing each other come into contact when displaced by an external force. That is, in the proposal of Patent Document 1, in the resin bell mouth, when the first mouse and the second mouse are displaced by receiving an external force, the opposing portions come into contact with each other, so that the first mouse and the second fan are displaced. And deformation of the bell mouth is prevented.

JP2015-113818A

  In order to ensure the performance of the outdoor unit, it is not enough to prevent the deformation of the bell mouth, and it is necessary to rectify the air from the heat exchanger to the fan. However, in the outdoor unit having a plurality of, for example, two fans as in Patent Document 1, the air flow due to the rotation of each fan affects each other. There is concern that the disturbance will occur.

  Therefore, the present invention can suppress the deformation of the mouse and the turbulence of the air in the region from the motor to the fan when receiving a downward downward external force in a blower in which resin bell mouths are arranged in parallel. An object is to provide a blower.

For this purpose, the blower of the present invention drives a fan having a first fan and a second fan provided in parallel with the first fan, a first motor for driving the first fan, and a second fan. An electric motor having a second motor, a first mouse that surrounds the first fan, a second mouse that surrounds the second fan, and a central section that separates the first mouse and the second mouse A bell mouth formed integrally from a resin material, a first region corresponding to the first motor to the first fan, a second region corresponding to the second motor to the second fan, The first region and the second region are in contact with each other through a partition.
The bell mouth according to the present invention is characterized in that a central section band that separates the first mouse and the second mouse is supported by a partition of the rectifier.

According to the blower of the present invention, since the rectifier having the first region and the second region is provided from the electric motor to the fan, the air flowing from the first motor to the first fan is rectified, and the second motor The air flowing from the second fan to the second fan can be rectified. Moreover, since the first area and the second area are partitioned by the partition, the air flowing through the first area and the second area can be rectified without being influenced by each other.
Furthermore, as for the air blower of this invention, the center division zone between the 1st mouse | mouth and the 2nd mouse | mouth is supported by the partition of a rectifier. Here, when an external force is applied to the bell mouth downward in the vertical direction, the portion of the central zone between the first mouse and the second mouse is most easily deformed downward. However, since the central section band is supported by the partition plate, the blower of the present invention is not easily deformed even if the bell mouth has snow, for example, and receives a downward external force.

The bell mouth in the blower of the present invention preferably has a peripheral edge supported by a rectifier in addition to the central zone.
Thus, the deformation of the bell mouth can be further suppressed by supporting the entire periphery and the central section zone by the rectifier.

The rectifier in the blower of the present invention is preferably supported by a housing that houses the electric motor, the fan, and the rectifier.
Thereby, a deformation | transformation of a bell mouth can be suppressed via a rectification body, without providing the member which supports a rectification body specially.
In addition, the support by the housing | casing of a rectifier includes indirect support via other members, such as a bracket, and direct support by a volt | bolt.

In the blower of the present invention, the housing includes a rectifying plate corresponding to the partition of the rectifying body, and is divided into a region corresponding to the first region of the rectifying member and a region corresponding to the second region of the rectifying member by the rectifying plate. It is preferred that
Thereby, since the flow of air is rectified to a certain level when introduced into the rectifier, the effect of rectification by the rectifier can be improved.

  According to the present invention, since the bell mouth is supported by the rectifier that realizes rectification from the electric motor to the fan, the rectifier has a function of preventing the bell mouth from being deformed without providing a special member in addition to the rectifier. Can be combined. Thereby, since the resin bell mouth may be displaced when receiving external force, the fan was mainly used for one blower, but the present invention can suppress the deformation of the bell mouth due to the external force, This makes it possible to apply a plastic bell mouth to a blower equipped with two fans.

The schematic structure of the outdoor unit of the air conditioner concerning this Embodiment is shown, (a) is a top view, (b) is a side view. The bell mouth concerning this Embodiment is shown, (a) is the IIb-IIb arrow directional cross-sectional view of (b), (b) is the IIa-IIa arrow directional cross-sectional view of (a). The rectification | straightening body concerning this Embodiment is shown, (a) is the IIIb-IIIb arrow sectional drawing of (b), (b) is the IIIa-IIIa arrow sectional drawing of (a). The bell mouth and rectifier concerning this embodiment are shown, (a) is a top view and (b) is an IVb-IVb arrow directional cross-sectional view of (a). It is a figure which shows the rectifier and bellmouth concerning a modification.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, an outdoor unit 1 for an air conditioner according to an embodiment of the present invention includes a housing 10 having a suction port 12 formed on a side surface 10 </ b> A, and a heat exchanger 15 provided inside the housing 10. And a blower 16 for discharging the air that has passed through the heat exchanger 15. In addition, although the heat exchanger 15 is not illustrated, it is used in this embodiment as a general term for the heat exchangers 15A and 15B. The same applies to the blower 16, the fan 17, the electric motor 18, and the like.

The blower 16 includes a fan 17, an electric motor 18 that drives the fan 17, a bell mouth 20 that houses the fan 17, and a rectifier 30 that is provided from the electric motor 18 to the fan 17.
When the electric motor 18 is driven, the air Air sucked into the housing 10 from the inlet 12 passes through the heat exchanger 15 as shown in FIG. 1B, and then moves in the vertical direction (FIG. 1B). In the up and down direction) and discharged from the bell mouth 20 toward the outside. The casing 10 is provided with a rectifying plate 19 at a position obtained by dividing the width direction X (FIG. 1A) into two equal parts, and the air Air sucked from the respective suction ports 12 is divided into blowers 16A and 16B. It flows toward. The rectifying plate 19 is provided over the entire area in the depth direction Y (FIG. 1A) of the housing 10.

The fan 17 includes a first fan 17A and a second fan 17B provided in parallel with the first fan 17A.
The electric motor 18 includes a first motor 18A that drives the first fan 17A and a second motor 18B that drives the second fan 17B. The first motor 18A and the second motor 18B are supported by the housing 10 at predetermined positions. For example, the first motor 18 </ b> A and the second motor 18 </ b> B can be supported at predetermined positions of the housing 10 by being fixed to a bracket fixed to the housing 10.

Next, the bell mouth 20 will be described with reference to FIGS.
The bell mouth 20 is provided so as to cover the upper surface 10 </ b> B of the casing 10 of the outdoor unit 1. The bell mouth 20 is made of a resin material and is integrally formed by, for example, injection molding.
The bell mouth 20 includes a base 23, a first mouse 21A, and a second mouse 21B.
The base 23 has a rectangular outer peripheral edge in plan view, and a flat plate portion except for the first mouse 21A and the second mouse 21B. The base 23 is fixed to the housing 10 by means such as a fastener including a screw.

The first mouse 21 </ b> A and the second mouse 21 </ b> B are formed so as to rise from the base 23 (FIG. 2B), and are arranged in contact with each other via the central section band 24 without being spaced in the width direction X. (FIG. 2A). The central section band 24 is provided at a position that bisects the first mouse 21A and the second mouse 21B of the bell mouth 20 in the width direction X. Here, the central section band 24 extends vertically from the base portion 23. Or it continues to the upper end in the height direction.
The first mouse 21A has a cylindrical shape and is provided so as to surround the first fan 17A. The first mouse 21A is provided with a clearance H from the outer peripheral edge of the first fan 17A.
The second mouse 21B has a cylindrical shape having the same shape and size as the first mouse 21A, and is provided so as to surround the second fan 17B. The second mouse 21B is arranged at a position symmetrical with the first mouse 21A with the reference line C that bisects the bell mouth 20 in the width direction X as the axis of symmetry.
In the present embodiment, the first mouse 21 </ b> A and the second mouse 21 </ b> B are formed so as to come into contact with each other at the central section band 24.

  As shown in FIG. 2B, the bell mouth 20 has an upstream end 20A located on the upstream side in the direction of blowing by the fan 17 and a downstream end 20B located on the downstream side in the direction of blowing. The bell mouth 20 is formed so that the opening area is constant from the upstream end 20A toward the downstream end 20B.

Next, the rectifier 30 will be described with reference to FIGS. 1, 3, and 4.
The rectifier 30 is provided from the electric motor 18 to the fan 17, and regulates the air flow from the electric motor 18 to the fan 17. The rectifier 30 can rectify by partitioning a region corresponding to the first motor 18A and the first fan 17A and a region corresponding to the second motor 18B and the second fan 17B. As with the bell mouth 20, the rectifying body 30 can be integrally formed by injection molding, or can be formed by bending a metal plate.

The rectifying body 30 has an outer shell and includes a side wall 31 formed in an oval shape in plan view.
As shown in FIG. 3A, the side wall 31 has an upstream end 30A located on the upstream side in the direction of blowing by the fan 17 and a downstream end 30B located on the downstream side in the direction of blowing. The side wall 31 is formed so that the opening area continuously narrows from the upstream end 30A toward the downstream end 30B by the outer periphery bulging from the upstream end 30A toward the downstream end 30B. The side wall 31 has the same dimensions as the peripheral edge of the base 23 of the bell mouth 20 at the downstream end 30B.
As shown in FIG. 3B, the side wall 31 has a height h and covers the blower 16 from the periphery from the electric motor 18 to the fan 17. As a result, the vicinity of the inside of the side wall 31 flows into the bell mouth 20 while undergoing a rectifying action from the upstream end 30A toward the downstream end 30B as the fan 17 rotates.

The rectifier 30 is provided with a flat partition 33 at a position that bisects in the width direction X when viewed in plan.
The partition 33 has the same height h as the side wall 31 and partitions the inside of the side wall 31 into a first region 35A and a second region 35B. The first area 35A accommodates the first fan 17A and the first motor 18A inside, and the second area 35B accommodates the second fan 17B and the first motor 18A.
The rectifying body 30 accommodates the whole area in the vertical direction of the electric motor 18 and the fan 17 together with the bell mouth 20. That is, the height h of the rectifying body 30 can vary depending on the height of the bell mouth 20. If the bell mouth 20 accommodates the entire area of the fan 17, the rectifying body 30 accommodates only the electric motor 18. If the bell mouth 20 accommodates only a part of the fan 17, the rectifier 30 is formed to accommodate the electric motor 18 and other parts of the fan 17. The vertical regions of the first region 35A and the second region 35B are determined by the above guidelines.
The rectifying plate 19 of the casing 10 described above is provided at a position corresponding to the partition 33 of the rectifying body 30, and the regions partitioned by the rectifying plate 19 correspond to the first region 35A and the second region 35B, respectively.

The outdoor unit 1 of the present embodiment is characterized by the arrangement of the bell mouth 20 and the rectifying body 30, and in particular, the bell mouth 20 is mounted on the rectifying body 30 as shown in FIGS. And supported. That is, the rectifying body 30 is supported at a predetermined position inside the housing 10, and the bell mouth 20 can be fixed to the bracket while being placed on the rectifying body 30. In this case, the rectifier 30 is indirectly supported by the housing 10.
As described above, the dimensions at the upstream end 20 </ b> A of the bell mouth 20 are the same as the dimensions at the downstream end 30 </ b> B of the rectifying body 30, and the bisected position in the bell mouth 20 and the bisected position in the rectifying body 30 are the same. Match. Therefore, when the bell mouth 20 is placed on the rectifying body 30, the side wall 31 of the rectifying body 30 contacts the peripheral portion of the bell mouth 20, and the side wall 31 supports the peripheral portion of the bell mouth 20. In addition, the partition 33 of the rectifier 30 is in contact with the central section band 24 of the bell mouth 20, and the partition 33 supports the central section band 24. That is, the bell mouth 20 includes the entire bell mouth 20 including the central section band 24, and the rectifier 30 is mechanically supported.

[Action and effect]
Hereinafter, the operation and effect of the outdoor unit 1 according to the present embodiment will be described.
The outdoor unit 1 includes a rectifier 30 from the electric motor 18 to the fan 17. The rectifying body 30 includes a first area 35A and a second area 35B. The first area 35A corresponds to the blower 16A, and the second area 35B corresponds to the blower 16B. Therefore, the rectifier 30 can rectify the air flowing through the blower 16A and rectify the air flowing through the blower 16B. Moreover, since the first region 35A and the second region 35B are partitioned by the partition 33, the first region 35A and the second region 35B can rectify the air flowing through each of them without being influenced by each other. .

Next, in the outdoor unit 1, the bell mouth 20 is placed on the rectifying body 30, and in particular, a central section band 24 provided at a position that bisects the bell mouth 20 is supported by the partition 33 of the rectifying body 30. Here, assuming that there is snow on the bell mouth 20, the portion of the central section band 24 that bisects the bell mouth 20 receives the load due to the snow and is most easily deformed downward in the vertical direction. However, in the outdoor unit 1, the central section band 24 is supported by the partition 33, and the rectifying body 30 including the partition 33 is supported by the housing 10, so that it is difficult to be deformed even if there is snow on the bell mouth 20. .
In addition, since the side wall 31 of the rectifying body 30 also supports the peripheral portion of the bell mouth 20, deformation of the bell mouth 20 is further suppressed.

As described above, since the outdoor unit 1 supports the bell mouth 20 by the rectifier 30 that realizes rectification from the electric motor 18 to the fan 17, without providing a special member in addition to the rectifier 30. The rectifier 30 can also have a function of preventing deformation of the bell mouth 20.
Conventionally, since a plastic bell mouth may be displaced when subjected to an external force, the fan is mainly used for one blower. However, in this embodiment, deformation of the bell mouth 20 due to the external force can be suppressed. This makes it possible to apply the resin bell mouth 20 to a two-fan blower provided with two fans.

Next, when the first mouse 21A receives an external force, the first mouse 21A tends to be displaced in a direction approaching the second mouse 21B. On the other hand, when the second mouse 21B receives an external force, the second mouse 21B tends to be displaced in a direction approaching the first mouse 21A.
However, in the bell mouth 20 of the present embodiment, the first mouse 21A and the second mouse 21B are provided without a gap, and are in contact with each other by the central section band 24, and both are formed integrally. Therefore, when the bell mouth 20 receives a downward external force, a force is applied to the central section band 24 from the first mouse 21A side. Similarly, when the bell mouth 20 receives a downward external force, a force is applied to the central section band 24 from the second mouse 21B side. Since the forces applied to both are opposite, both forces applied to the central section band 24 are canceled out. Therefore, the displacement of the first mouse 21A and the second mouse 21B is suppressed.
When the displacement of the first mice 21A and 21B is suppressed, the set clearance H can be maintained. Therefore, it is possible to prevent the performance of the blower 16 from being degraded and the bell mouth 20 and the fans 17A and 17B from being damaged due to the contact between the first mice 21A and 21B and the fans 17A and 17B.

Although the present embodiment has been described above, the configuration described in the above embodiment can be selected or changed to other configurations as appropriate without departing from the gist of the present invention. It is.
For example, in the above embodiment, the partition 33 of the rectifier 30 has the same height h as the side wall 31, but the present invention does not require that the side wall 31 and the partition 33 have the same height. As long as the support of the 33 central section band 24 is secured, for example, as shown in FIG. 5A, the partition 33 may be lower. However, it is preferable that the partition 33 has the same height h as the side wall 31 in order to rectify the airflow.

  Moreover, in the said embodiment, although the partition 33 of the rectification | straightening body 30 had a plate-shaped form, this invention is not limited to this. For example, as shown in FIG. 5B, an arcuate shape can be adopted so as to correspond to the embodiment in which the side wall 31 is squeezed. Thereby, the effect of rectification in each of the first region 35A and the second region 35B can be improved. However, in the form of FIG. 5B, it is assumed that the flow path through which the air flows is narrowed to reduce the air volume. Accordingly, as shown in FIG. 1, if the flow of air passing through the housing 10 is rectified by providing a rectifying plate 19 corresponding to the partition 33 inside the housing 10, only the plate-like partition 33 is provided. Thus, sufficient rectification can be achieved.

Next, in the embodiment described above, the first mouse 21A and the second mouse 21B are in contact with each other at the central section band 24. However, as shown in FIG. A gap G may be provided between the two mice 21B.
In this case, the gap G is preferably set so that the first mouse 21A and the second mouse 21B come into contact with each other when the first mouse 21A and the second mouse 21B are displaced by receiving an external force. Then, as in the present embodiment in which the first mouse 21A and the second mouse 21B are in contact with each other from the beginning, the forces applied to the first mice 21A and 21B are canceled, and the first mice 21A and 21B are not displaced. .
For that purpose, when the first mouse 21A and the second mouse 21B receive an external force and the maximum displacement amounts in the directions approaching each other are L1 and L2, respectively, the gap G is set to satisfy G <L1 + L2. Is done.
A gap G is provided between the first mouse 21A and the second mouse 21B, and the central section band 24 of this embodiment is provided only at the base 23.

Moreover, you may provide a rib in the circumferential direction of the outer peripheral wall of 1st mouse | mouth 21A, 21B, respectively. The rib may be formed integrally with the bell mouth 20.
By providing the ribs, the rigidity of the first mice 21A and 21B is increased, so that the entire first mice 21A and 21B are difficult to be deformed with respect to the external force.
The rib is not limited to being provided on both the first mouse 21A and 21B, and may be provided on either one, and the rib is not limited to the example provided on the outer peripheral side of the mouse, but provided on the inner peripheral side. You can also.

  In the outdoor unit 1, the entire area of the first mouse 21 </ b> A, the second mouse 21 </ b> B, and the central section band 24 of the bell mouth 20 is supported by the rectifier 30, but the present invention is not limited to this. For example, it is possible to have a structure in which only the central section band 24 is supported by the rectifier 30 and the other part is supported by the housing 10.

  Furthermore, in the present embodiment, an example in which only two fans are provided in parallel is shown. However, when three or more fans are provided in parallel, the present invention is applied between two adjacent fans. be able to.

DESCRIPTION OF SYMBOLS 10 Housing | casing 10A Side surface 10B Top surface 12 Inlet 15A, 15B Heat exchanger 16A Blower 16B Blower 17A 1st fan 17B 2nd fan 18A 1st motor 18B 2nd motor 19 Current plate 20 Bellmouth 20A Upstream end 20B Downstream end 21A 1st 1 mouse 21B second mouse 23 base 24 central section 30 rectifier 30A upstream end 30B downstream end 31 side wall 33 partition 35A first area 35B second area

Claims (4)

A fan having a first fan and a second fan provided in parallel with the first fan;
An electric motor having a first motor for driving the first fan and a second motor for driving the second fan;
A first mouse surrounding the periphery of the first fan, a second mouse surrounding the periphery of the second fan, and a central section zone separating the first mouse and the second mouse; A bell mouth formed integrally with,
A first region corresponding to the first motor to the first fan, and a second region corresponding to the second motor to the second fan, wherein the first region and the second region are A rectifier that is in contact via a partition,
The bell mouth is
The central section band that separates the first mouse and the second mouse is supported by the partition of the rectifier.
A blower characterized by that. The bellmouth is
In addition to the central zone, the periphery is supported by the rectifier,
The blower according to claim 1. The rectifier is
It is supported by a housing that houses the electric motor, the fan, and the rectifier.
The blower according to claim 1 or 2. The housing is
A rectifying plate corresponding to the partition of the rectifying body is provided,
The current plate is partitioned into a region corresponding to the first region and a region corresponding to the second region,
The blower according to claim 3.

Images