WO2023002956A1

WO2023002956A1 - Air conditioner

Info

Publication number: WO2023002956A1
Application number: PCT/JP2022/027916
Authority: WO
Inventors: 健吾松永; 大松井
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2021-07-20
Filing date: 2022-07-15
Publication date: 2023-01-26
Also published as: JP2023015747A

Abstract

Provided is an air conditioner that increases the heat exchange efficiency between a heat exchanger and air blown out from a fan.　This air conditioner comprises: a sirocco fan 52 that exhausts air in the radial direction; a scroll casing 56, which accommodates the sirocco fan 52 and is provided with an opening 57 that suctions air from the direction of a rotary shaft 78 of the sirocco fan 52 by rotation of the sirocco fan 52, an outlet 58 that is an opening through which the air that has been suctioned is blown out, and side surface parts 63 provided to the left and right of the outlet 58; a heat exchanger 69, which receives the air blown out from the outlet 58; and a casing 19, which is provided with a top plate 16, a bottom plate 15, and side plates, and accommodates the scroll casing 56 and the heat exchanger 69. An inside surface 73 of at least one of the side surface parts 63 is provided with a rectification part that extends linearly so as to approach from an upper edge 86 side toward a lower edge 88 side of the outlet 58 as the position approaches the outlet 58, and rectifies the air blown from the outlet 58.

Description

air conditioner

The present disclosure relates to air conditioners.

Patent Literature 1 discloses an air conditioner capable of changing the opening area of the outlet of a sirocco fan according to connection ducts of various lengths and shapes. This air conditioner includes a heat exchange chamber containing a heat exchanger, a blower chamber containing a sirocco fan, an air outlet on the heat exchanger chamber side, an air intake on the air blower chamber side, an air outlet and an air intake. Each mouth has a detachable duct connection flange.
Patent Literature 2 discloses an air conditioner that can ensure a constant wind speed and provide comfortable air conditioning. This air conditioner includes an impeller that radially blows air taken in from the direction of the rotation axis, and an air outlet that accommodates the impeller and circulates the air blown from the impeller around the impeller and blows it to the outside. a sirocco fan having a diffuser located at the . Further, the diffuser of this air conditioner includes a flow dividing plate for laterally widening the blowing direction of air blown from the diffuser, and a plurality of mounting portions for mounting the flow dividing plate.

JP 2008-249287 A JP 2017-186944 A

The present disclosure provides an air conditioner capable of improving heat exchange efficiency between a heat exchanger and air blown out from a fan.

This specification includes all the contents of Japanese Patent Application/Japanese Patent Application No. 2021-119701 filed on July 20, 2021.
An air conditioner according to the present disclosure includes a sirocco fan that exhausts air in a radial direction, an opening that accommodates the sirocco fan and sucks air from the direction of the rotation axis of the sirocco fan by rotating the sirocco fan, and an intake a scroll casing including a blowout opening that is an opening through which the discharged air is blown out; side portions provided on the left and right sides of the blowout opening; a heat exchanger that receives the air blown out from the blowout opening; a top plate and a bottom plate; and a side plate, and a housing that accommodates the scroll casing and the heat exchanger.
On the inner surface of at least one of the side portions, a rectifying portion linearly extends from the upper edge side to the lower edge side of the air outlet as it approaches the air outlet and straightens the air blown out from the air outlet. be provided.

According to the present disclosure, the heat exchange efficiency between the heat exchanger and the air blown out from the fan can be improved.

FIG. 1 is a cross-sectional view along the rotation axis of a sirocco fan of an indoor unit provided in an air conditioner according to Embodiment 1 of the present disclosure. Figure 2 is a longitudinal sectional view of the indoor unit FIG. 3 is a vertical cross-sectional view of the housing and the blower fan FIG. 4 is a diagram showing rectifying grooves FIG. 5 is a vertical cross-sectional view of a housing and a blower fan included in an indoor unit of an air conditioner according to Embodiment 2 of the present disclosure. FIG. 6 is a vertical cross-sectional view of a housing and a blower fan included in an indoor unit of an air conditioner according to Embodiment 3 of the present disclosure.

(Knowledge, etc. on which this disclosure is based)
At the time when the inventors came up with the present disclosure, in an air conditioner provided with a sirocco fan that blows out air to exchange heat with a heat exchanger, a duct connected to the outlet side of the sirocco fan provided in the main body of the air conditioner There is a technology that allows the connection flange to be freely moved and the opening size of the air outlet to be freely changed. As a result, in this air conditioner, it is possible to change the opening area of the blow-out port according to connection ducts of various lengths and shapes.
Further, in the air conditioner, the sirocco fan is provided with a diffuser, and the diffuser is provided with a flow dividing plate for laterally widening the blowing direction of the blown air, and a plurality of mounting portions for mounting the flow dividing plate. , there has been a technique that enables a flow dividing plate to be attached to a specific attachment portion selected from a plurality of attachment portions. As a result, in this air conditioner, it is possible to switch the details of branching of the air blown out from the diffuser provided in the sirocco fan.

However, in conventional air conditioners, the air blown out from the sirocco fan is blown out in the radial direction of the sirocco fan and flows biased toward the outer peripheral side of the scroll casing that houses the sirocco fan. For this reason, the flow velocity of the air blown out from the blowout port provided in the scroll casing is high on the outer peripheral side of the scroll casing, and the flow velocity is low on the inner peripheral side of the scroll casing. Therefore, the air blown out from the sirocco fan is biased toward a portion of the heat exchanger. Then, the amount of heat exchange between the air and the refrigerant in the part of the heat exchanger where more air is blown, the amount of heat exchange with the other part of the heat exchanger where less air is blown is less. In other words, the inventors discovered a problem in conventional air conditioners that the heat exchange efficiency between the refrigerant flowing into the heat exchanger and the air is reduced. came to configure.

Accordingly, the present disclosure provides an air conditioner capable of improving the heat exchange efficiency between the heat exchanger and the air blown out from the fan.
Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters or redundant descriptions of substantially the same configurations may be omitted. This is to avoid the following description from becoming more redundant than necessary and to facilitate understanding by those skilled in the art.
It should be noted that the accompanying drawings and the following description are provided to allow those skilled in the art to fully understand the present disclosure and are not intended to limit the claimed subject matter thereby.

(Embodiment 1)
Embodiment 1 will be described below with reference to FIGS. 1 to 4. FIG. The symbol FR shown in each figure indicates the front of the indoor unit in a horizontally suspended state, the symbol UP indicates the upper side of the indoor unit, and the symbol RH indicates the right side of the indoor unit. In the following description, each direction is a direction along the direction of these indoor units.
[1-1. Constitution]
[1-1-1. Configuration of air conditioner]
FIG. 1 is a cross-sectional view along the rotating shaft 78 of the sirocco fan 52 of the indoor unit 10 provided in the air conditioner 1. FIG. This FIG. 1 is a plan view of a cross section along the front-rear direction and left-right direction of the indoor unit 10 passing through the rotating shaft 78 of the sirocco fan 52 .

As shown in FIG. 1, the air conditioner 1 of the present embodiment includes an indoor unit 10. The air conditioner 1 includes a heat exchanger 69 housed in the indoor unit 10, a pressure reducing device such as a compressor and an electronic expansion valve housed in the outdoor unit, and an outdoor heat exchanger. Equipped with a refrigeration cycle. Then, in the air conditioner 1, a predetermined space to be conditioned is air-conditioned by circulating the refrigerant in this refrigeration cycle.

The indoor unit 10 is an indoor unit of the duct-type air conditioner 1 installed in the ceiling space, inside the wall, or under the floor. The indoor unit 10 is formed so that the arrangement direction of the air outlet can be changed so that the blowing direction can be changed according to the installation location. For this reason, for example, when blowing air in the horizontal direction, the indoor unit 10 is installed in a so-called flat hanging state in which the blowout port is positioned on the side. Further, when air is blown upward, the indoor unit 10 is installed in a so-called vertically suspended state in which the air outlet is positioned upward.
In the following description, the vertical direction means the vertical direction when the indoor unit 10 is installed in a horizontally suspended state.

FIG. 2 is a longitudinal sectional view of the indoor unit 10. FIG. FIG. 2 is a view of a cross section along the longitudinal direction and the vertical direction of the indoor unit 10 passing through a position avoiding the plurality of blower fans 35 and viewed from the left side of the indoor unit.
As shown in FIGS. 1 and 2, the indoor unit 10 includes a housing 19 composed of a front panel 11, a rear panel 12, a pair of side panels, namely a right panel 13 and a left panel 14, a bottom panel 15, and a top panel 16. have. The front plate 11 is provided with a discharge port 18 that is a rectangular opening over the entire left-right direction. Further, the back plate 12 is provided with a suction port 59 that is a rectangular opening.

The internal space of the housing 19 is partitioned into a blowing chamber 22 and a heat exchange chamber 23 by a partition plate 21 .
The partition plate 21 is a flat member having a predetermined length. Both ends of the partition plate 21 in the longitudinal direction are connected to substantially the center of each of the right side plate 13 and the left side plate 14 .

An electric motor 54 and a plurality of blower fans 35 are arranged in the blower chamber 22 .
The electric motor 54 is a so-called motor.
Each blower fan 35 includes a sirocco fan 52 , a scroll casing 56 and a main plate 71 . The sirocco fan 52 is a centrifugal fan and has a rotating shaft 78 . The sirocco fans 52 included in the plurality of blower fans 35 are connected to each other by a rotating shaft 78 . The scroll casing 56 is a casing that houses the sirocco fan 52 . The scroll casing 56 is provided with an opening 57 that takes in air by the rotation of the sirocco fan 52, and a duct-like air blower 65 that sends out the air taken in by the sirocco fan 52 in a predetermined direction.

The electric motor 54 is connected to a rotating shaft 78 of the sirocco fan 52 and rotates the sirocco fan 52 via this rotating shaft 78 .
As shown in FIG. 1 , in this embodiment, three blower fans 35 are arranged in the blower chamber 22 . Note that the configuration of FIG. 1 is an example, and the numbers of the electric motors 54 and the blower fans 35 included in the indoor unit 10 are not limited.

The partition plate 21 is provided with a plurality of communication openings 25 that communicate with the blowing chamber 22 and the heat exchange chamber 23 , and the blowing section 65 of the blowing fan 35 is joined to each of the communication openings 25 . Also, the opening 57 of the blower fan 35 opens into the blower chamber 22 .

When the blower fan 35 operates, the blower fan 35 draws air from the blower chamber 22 through the suction port 59 , so that outside air flows into the blower chamber 22 . The outside air is sent to the heat exchange chamber 23 through the communication opening 25 formed in the partition plate 21 by the blower fan 35 .
That is, the blower chamber 22 is the space on the primary side of the blower fan 35, and the heat exchange chamber 23 is the space on the secondary side.

A heat exchanger 69 is arranged in the heat exchange chamber 23 . The heat exchanger 69 is a utilization side heat exchanger that functions as an evaporator that evaporates the refrigerant supplied from the outdoor unit or a condenser that condenses the refrigerant.

The heat exchanger 69 of the present embodiment is a so-called fin-and-tube heat exchanger, and the heat exchanger 69 has a plurality of metal fins joined to a copper refrigerant pipe, and has an elongated shape as a whole. It is formed in a flat plate shape.
Refrigerant sent from the outdoor unit flows into one end of this refrigerant pipe. The inflowing refrigerant flows through the entire heat exchanger 69 through the refrigerant pipe and flows out from the other end of the refrigerant pipe to the outdoor unit again.

As shown in FIG. 1, the heat exchanger 69 is arranged such that its longitudinal direction extends along the lateral direction of the heat exchange chamber 23 .
In addition, as shown in FIG. 2, the heat exchanger 69 is inclined from the front plate 11 side toward the partition plate 21 side from the upper edge toward the lower edge of the heat exchanger 69 in the heat exchange chamber 23 . placed in a closed state.
That is, the heat exchanger 69 is arranged such that the vertical direction is oblique to the vertical direction of the partition plate 21 when the indoor unit 10 is viewed from the side.
As a result, the heat exchanger 69 is arranged with one plane facing the partition plate 21 and each air blower 65 and the other plane facing the discharge port 18 .

The air sent to the blowing chamber 22 by the blowing fan 35 exchanges heat with the refrigerant flowing through the refrigerant pipe when passing through the heat exchanger 69 mainly through the gaps between the fins, and is formed on the front plate 11. It is exhausted from the discharge port 18 .

[1-1-2. Configuration of Blower Fan]
FIG. 3 is a longitudinal sectional view of the housing 19 and the blower fan 35. As shown in FIG. FIG. 3 is a cross-sectional view taken from the left side of the indoor unit 10 along the front-back direction and the up-down direction of the indoor unit 10 and passing through substantially the center of one blower fan 35 in the left-right direction.
Next, the configuration of the blower fan 35 will be described in detail.
As described above, the blower fan 35 includes the sirocco fan 52 that radially exhausts air and the scroll casing 56 that houses the sirocco fan 52 .
The sirocco fan 52 is a drum-shaped or cylindrical centrifugal fan provided with a large number of blades in the circumferential direction. As shown in FIG. 3, the sirocco fan 52 is formed in a substantially annular shape when viewed from the rotating shaft direction.

The scroll casing 56 is provided with a casing main body 84 that houses the sirocco fan 52 and a blower portion 65 projecting in one direction from the casing main body 84 .
The casing main body 84 includes a pair of side plates 72 located in the rotation axis direction of the sirocco fan 52 . As described above, each side plate 72 is provided with an opening 57 opening in the rotation axis direction of the sirocco fan 52 . The blower fan 35 draws in air from the opening 57 as the sirocco fan 52 rotates.

The air blowing portion 65 is formed in a duct shape, and includes an upper surface portion 61 forming an upper surface of the air blowing portion 65, a lower surface portion 62 forming a lower surface, and side surface portions 63 forming left and right side surfaces. Each side surface portion 63 is a flat plate portion continuous with each side plate 72 .
A blowout port 58 that is an opening is provided at the end portion of the blower portion 65 located on the opposite side of the casing main body 84 . The outlet 58 is provided with an open end 66 formed by edges of the upper surface portion 61 , the lower surface portion 62 , and the side surface portions 63 .

FIG. 4 is a diagram showing the rectifying groove 60. As shown in FIG.
As shown in FIG. 4 , a plurality of rectifying grooves 60 are provided on at least one side surface portion 63 . These rectifying grooves 60 are an example of the rectifying section recited in the claims of the present disclosure.
More specifically, these rectifying grooves 60 are rectifying portions that are recessed in a groove-like shape in the inner surface 73 of the scroll casing 56 , which is a flat surface on the inner side. These regulating grooves 60 are linear grooves extending from the open end 66 toward the side plate 72, and these regulating grooves 60 are arranged substantially parallel to each other with a predetermined interval between the upper and lower scroll casings 56. arranged along the direction. These rectifying grooves 60 are curved in an arc along the peripheral surface of the sirocco fan 52 . In other words, these linear straightening grooves 60 are formed so as to draw a curve with a predetermined curvature.

In the present embodiment, the ends of these rectifying grooves 60 located on the side opposite to the blowout port 58 side are closer to the blowout port 58 than the vertical plane 83 passing through the rotation shaft 78 when viewed from the direction of the rotation shaft 78 . placed in a spaced apart position.
Here, the vertical plane 83 is a virtual plane parallel to the up-down direction of the indoor unit 10 and parallel to the left-right direction of the indoor unit 10 . This vertical plane 83 is perpendicular to the top plate 16 . The end of each rectifying groove 60 located on the side opposite to the outlet 58 side intersects with this vertical plane 83 and is arranged at a position further away from the outlet 58 side than the vertical plane 83 .

In each straightening groove 60, when a virtual straight line L1 is drawn from the upstream end point of the straightening groove 60 to the open end 66 side end point, the angle θ1 formed by the virtual straight line L1 and the top plate 16 is is larger than the angle θ2. Also, the angle θ1 is smaller than the angle θ3 formed by the tangent line L2 of the sirocco fan 52 drawn from the most downstream position of the lower surface portion 62 and the top plate 16 .

[1-2. motion]
The operation of the air conditioner 1 configured as described above will be described below.
In the air conditioner 1, the operation of the sirocco fan 52 draws in air from the suction port 59, flows into the scroll casing 56 from the opening 57 in the rotation axis direction, and blows out from the air blower 65 to the heat exchanger 69. The conditioned air heat-exchanged by the heat exchanger 69 is discharged from the discharge port 18 .
The air discharged from the sirocco fan 52 is blown out in the radial direction of the sirocco fan 52 and flows biased toward the outer peripheral side of the scroll casing 56 . Therefore, the air blown from the air blowing portion 65 of the scroll casing 56 has a high flow velocity in the upper part of the heat exchanger 69 and a low flow velocity in the lower part. Therefore, the amount of heat exchanged by the refrigerant flowing into the upper part of the heat exchanger 69 is smaller than the amount of heat exchanged by the refrigerant flowing into the upper part of the heat exchanger 69, and there is a concern that the heat exchange efficiency is lowered.

In the present embodiment, by providing the straightening grooves 60, the air flow biased to the outer peripheral side in the scroll casing 56 radially discharged from the sirocco fan 52 is guided in the direction of the straightening grooves 60 and near the straightening grooves 60. airflow is induced by the induced airflow and is deflected downward of the outlet 58 .
In this way, since the airflow blown out from the scroll casing 56 is deflected downward in the blowout port 58, the wind speed of the air flowing into the lower part of the heat exchanger 69 increases, and the air flowing into the heat exchanger 69 moves in the vertical direction. It is possible to improve the heat exchange efficiency by improving the wind speed distribution of

[1-3. effects, etc.]
As described above, in the present embodiment, the air conditioner 1 accommodates the sirocco fan 52 that exhausts air in the radial direction, and the sirocco fan 52 . The scroll casing 56 is provided with an opening 57 for sucking in from the direction of 78 , a blowout port 58 from which the sucked air is blown out, and side portions 63 provided on the left and right sides of the blowout port 58 . The air conditioner 1 also includes a heat exchanger 69 for receiving air blown out from the blower outlet, a top plate 16, a bottom plate 15, a right side plate 13, and a left side plate 14, and a scroll casing 56 and a heat exchanger. and a housing 19 that accommodates 69 . On the inner side surface 73 of at least one side surface portion 63 , the liquid is linearly extended from the upper edge 86 side toward the lower edge 88 side of the outlet 58 as it approaches the outlet 58 , and the liquid is blown out from the outlet 58 . Straightening grooves 60 for straightening the air are provided.

As a result, the flow of air blown out from the scroll casing 56 is deflected downward, so that the velocity of the air flowing into the lower part of the heat exchanger 69 increases, and the air flowing into the heat exchanger 69 moves in the vertical direction. It is possible to improve the heat exchange efficiency by improving the wind speed distribution of

As in this embodiment, the scroll casing 56 has an upper surface portion 61 that is continuous with the upper edge 86 of the outlet 58 . The angle θ1 formed by the top plate 16 and the imaginary straight line L1 connecting the end portion of the regulating groove 60 located on the upstream side of the air flowing through the scroll casing and the end portion of the regulating groove 60 located on the air outlet 58 side is , the angle .theta.2 formed between the top plate 16 and the upper surface portion 61, and smaller than the angle .theta.3 formed between the top plate 16 and the tangent line L2 of the sirocco fan 52 passing through the lower edge 88 of the outlet.
As a result, the airflow biased toward the outer periphery within the scroll casing is induced toward the regulating grooves, and the airflow near the regulating grooves is guided by the guided airflow and deflected downward. Therefore, the air sucked by the rotation of the sirocco fan 52 can be more smoothly guided toward the lower surface portion 62 of the outlet 58 .

(Embodiment 2)
Embodiment 2 will be described below with reference to FIG.
FIG. 5 is a longitudinal sectional view of the housing 19 and the blower fan 35 included in the indoor unit 10 of the air conditioner 1. FIG.
In FIG. 5, the same parts as those in FIG. 3 are assigned the same reference numerals, and the description thereof is omitted.

[2-1. Constitution]
As shown in FIG. 5, the present embodiment is characterized in that the rectifying grooves 60 are formed only in the area on the outlet 58 side from the vertical plane 83 passing through the rotating shaft 78 when viewed from the direction of the rotating shaft 78. different from 1. The ends of these rectifying grooves 60 located on the side opposite to the outlet 58 side are arranged at positions spaced from the vertical surface 83 by a predetermined distance.

[2-2. motion]
In the air conditioner 1 configured as described above, the airflow discharged from the sirocco fan 52 is discharged in the tangential direction, and the airflow discharged from the outlet 58 side from the vertical plane 83 passing through the rotation shaft 78 Since it does not have a vertical velocity vector directed toward the plate 16 , it flows into and deflects without colliding with the side surface of the rectifying groove 60 .
Therefore, the air taken into the scroll casing 56 is gradually deflected, thereby suppressing the occurrence of pressure loss and maintaining the air volume.

(Embodiment 3)
Embodiment 3 will be described below with reference to FIG.
FIG. 6 is a longitudinal sectional view of the housing 19 and the blower fan 35 included in the indoor unit 10 of the air conditioner 1. FIG.
In FIG. 6, the same parts as those in FIG. 3 are given the same reference numerals, and the description thereof is omitted.

[3-1. Constitution]
As shown in FIG. 5, the present embodiment is implemented in that the rectifying grooves 60 extend from the vicinity of the vertical plane 83 passing through the rotating shaft 78 toward the outlet 58 when viewed from the rotating shaft 78 direction. different from form 1 of In addition, the ends of these rectifying grooves 60 located on the side opposite to the blowout port 58 side are positioned sufficiently closer to the vertical surface 83 from the blowout port 58 side than the rectifying grooves 60 shown in the second embodiment. placed in

[3-2. motion]
As a result, the airflow discharged from the sirocco fan 52 passes through the vertical plane 83 passing through the rotating shaft 78 within the scroll casing 56 , and flows into the rectifying groove 60 in a substantially horizontal direction toward the air outlet 58 . . As a result, since the light is gradually deflected within the rectifying groove 60, abrupt deflection can be suppressed and rectification can be improved.

(Other embodiments)
As described above, Embodiments 1 to 3 have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments with modifications, replacements, additions, omissions, and the like. Also, it is possible to combine the constituent elements described in the first to third embodiments to form a new embodiment.
Therefore, other embodiments will be exemplified below.

In Embodiments 1, 2, and 3 above, an example in which the rectifying groove 60 is provided from the upstream side to the open end 66 is shown, but the present disclosure is not limited to this. Instead, an end portion of the rectifying groove 60 on the side of the opening end 66 or a partition may be positioned from the upstream side to the opening end 66 .

Further, in Embodiment 1, an example in which the cross-sectional shape of the rectifying groove 60 is rectangular is shown. As a result, the air flowing into the rectifying grooves 60 can be enclosed and prevented from flowing out of the rectifying grooves 60 . However, the present disclosure is not so limited and may employ various widths and depths, cross-sectional shapes, and end shapes that can guide airflow.

Also, the straightening grooves 60 may have various curves, curvatures, and angles as long as the airflow can be guided from the upstream side to the open end 66 side. For example, when forming the straightening grooves 60 from near the highest point of the sirocco fan 52 on the side surface portion 63, after starting to form the straightening grooves 60 parallel to the horizontal direction, the grooves are formed so as to move toward the lower surface portion 62 toward the opening end. can be formed to As a result, the airflow discharged from the highest point of the sirocco fan 52 is discharged in the tangential direction of the sirocco fan 52 , so that the collision of the airflow with the inner side surfaces 73 of the rectifying grooves 60 can be suppressed.

Further, for example, the end surfaces on the upstream side and the opening end 66 side of the rectifying groove 60 may be joined to the side surface portion 63 in various shapes.
For example, in Embodiment 1, the upstream end surface of the rectifying groove 60 is connected to the side surface portion 63 in an R shape. As a result, the airflow flowing into the rectifying groove 60 can suppress pressure loss caused by the step. Similarly, the rectifying groove 60 has an end surface located on the open end 66 side, and the corner on the lower surface portion 62 side is rounded. As a result, when the airflow in the rectifying grooves 60 blows downward, separation at the corners can be suppressed.

In Embodiments 1, 2, and 3 above, an example is shown in which the rectifying groove 60 maintains the same shape from the upstream side to the open end 66 side, but the present disclosure is limited to this. not to be For example, if the air conditioner 1 can guide the airflow from the upstream side to the open end 66 side, the width, depth, and cross section of the rectifying groove 60 are changed from the upstream side to the open end 66 side. The shape and end shape may be changed.

In Embodiments 1, 2, and 3, the rectifying grooves 60 having the same angle and the same shape are arranged from the rectifying groove 60 on the upper surface portion 61 side to the rectifying groove 60 on the lower surface portion 62 side. Although examples are given, the disclosure is not limited thereto and may employ different shapes and combinations of angles, curvatures and lengths.
Further, when arranging the rectifying grooves 60 on the left and right side portions 63, combinations of different shapes, numbers, angles, lengths, and arrangements may be adopted even if they are not bilaterally symmetrical.

Further, for example, when arranging the straightening grooves 60, it is preferable to provide at least the straightening grooves 60 extending from the vicinity of the upper surface portion 61. As a result, the centrifugal force of the sirocco fan 52 can deflect a large amount of the air flow biased toward the outer peripheral side of the scroll casing 56 downward.

Further, in Embodiments 1, 2, and 3 above, the rectifying groove 60 is formed as an example of the rectifying section, but this is not the only option, and the inner surface can be used as means for deflecting the airflow downward. A protrusion projecting from 73 may be employed. Similar to the regulating grooves 60, these projections are formed in a linear shape extending from the opening end 66 toward the side plate 72, and are spaced apart from each other by a predetermined interval so as to be substantially parallel to each other. Arranged along the direction. Each of these projecting portions is curved in an arc along the peripheral surface of the sirocco fan 52 and is formed to draw a curve with a predetermined curvature.
Since the airflow discharged from the sirocco fan 52 is rectified by the projecting portion and gradually deflected downward, it is possible to suppress the occurrence of pressure loss due to sudden deflection of the airflow.

In addition, any manufacturing method, assembly method, material, and raw material may be adopted when arranging the rectifying grooves 60 . For example, the air conditioner 1 is provided with an attachment-type rectifying groove 60 that can be attached to and detached from the side surface portion 63 . As a result, the shape of the rectifying groove 60 can be changed to an attachment type, and the diffusion direction of the blown airflow can be changed according to the specifications of the heat exchanger 69 and the position where the scroll casing 56 is attached to the heat exchanger 69. can be changed.

In Embodiment 1 above, an example is shown in which the scroll casing 56 that houses two connected sirocco fans 52 is arranged with respect to the center in the direction of the rotation shaft 78, but the present disclosure is limited to this. Various shapes, numbers, combinations and arrangements of sirocco fans 52 and scroll casings 56 may be employed.

In Embodiment 1 above, an example is shown in which the I-shaped heat exchanger 69 is arranged such that the distance from the side of the scroll casing 56 on which the outlet 58 is located is increased, but the present disclosure is directed to this. , and various shapes and arrangements of heat exchangers 69 may be employed.

Note that the above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied within the scope of the gist of the present invention.

Since the present disclosure can deflect the airflow blown out from the scroll casing downward, in addition to a refrigeration cycle device such as a ceiling-embedded duct-type indoor unit, a ceiling-suspended indoor unit, or a floor-standing indoor unit, It can also be applied to applications such as drying equipment and air supply/exhaust ventilation equipment.

Reference Signs List 1 air conditioner 10 indoor unit 15 bottom plate 16 top plate 18 outlet 19 housing 35 blower fan 52 sirocco fan 56 scroll casing 57 opening 58 outlet 59 suction port 60 rectifying groove (rectifying section)
61 upper surface portion 62 lower surface portion 63 side surface portion 65 blower portion 66 opening end 69 heat exchanger 72 side plate 73 inner surface 78 rotation axis L1 imaginary straight line (straight line)
L2 tangent line θ1, θ2, θ3 angle

Claims

a sirocco fan that exhausts air radially;
An opening that accommodates the sirocco fan and sucks air from the direction of the rotating shaft of the sirocco fan by rotation of the sirocco fan, an air outlet that is an opening from which the sucked air is blown, and left and right sides of the air outlet. a scroll casing comprising a side portion provided in the
a heat exchanger that receives the air blown out from the outlet;
a housing comprising a top plate, a bottom plate, and a side plate, and housing the scroll casing and the heat exchanger;
On the inner surface of at least one of the side portions, a rectifying portion linearly extends from the upper edge side to the lower edge side of the air outlet as it approaches the air outlet and straightens the air blown out from the air outlet. An air conditioner characterized by:
The scroll casing has an upper surface portion continuous to the upper edge of the outlet,
The angle formed by the top plate and a straight line connecting the end of the rectifying portion located on the upstream side of the air flowing through the scroll casing and the end of the rectifying portion located on the outlet side is
larger than the angle formed by the top plate and the top surface,
The air conditioner according to claim 1, wherein the angle is smaller than the angle formed by a tangent line of the sirocco fan passing through the lower edge of the outlet and the top plate.
1. The rectifying section is formed in a region closer to the outlet side than a vertical plane that passes through the rotating shaft and is perpendicular to the top plate when viewed from the direction of the rotating shaft. 2. The air conditioner according to 2.
4. The straightening section is provided over a position that passes through the rotation axis and approaches a vertical plane orthogonal to the top plate when viewed from the direction of the rotation axis. The air conditioner according to any one of the items.
The air conditioner according to any one of claims 1 to 4, wherein the rectifying portion is formed by recessing the side portion in a groove shape.
The air conditioner according to any one of claims 1 to 4, wherein the rectifying portion is formed to protrude from the side portion.