JPH0743164B2 - Air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ceiling-embedded air conditioner, and more particularly to an air passage structure for dividing conditioned air into two directions.

(Prior Art) Conventionally, as an air conditioner of this kind, for example
As disclosed in Japanese Patent Laid-Open No. 6123, as shown in FIG. 2, a first outlet (b) and a second outlet (c) are provided on both sides of the lower surface of the casing (a), and the first outlet is provided. The heat exchanger (d) is arranged in the casing (a) located above the inner end surface side of (b), and the sirocco fan (e) is arranged upstream of the heat exchanger (d). And has a first air passage (f) extending from the downstream surface of the heat exchanger (d) to the first outlet (b) and an angle substantially perpendicular to the first air passage (f). It is known that a second air passage (g) leading to the second outlet (c) after branching is provided. In this case, the conditioned air jetted by the sirocco fan (e) through the heat exchanger (d) jets in the first air passage (f) and collides with the lower surface of the casing (a), and then the second air. The air is diverted into the passage (g) so that the conditioned air is blown out from the first outlet (b) and the second outlet (c), respectively.

Further, as shown in FIG. 3, the air conditioner is jetted to the wall surface of the branch portion (h ') of the first air passage (f') by the sirocco fan (e ') via the heat exchanger (d'). There is also one in which a substantially triangular projection (i) is provided to divide the air into the first air passage (f ') side and the second air passage (g') side, respectively. By colliding the conditioned air jetting in the first air passage (f ′) with the protrusion (i), the conditioned air is smoothly divided into the second air passage (g ′), and the lower surface of the casing (a ′) is formed. The amount of conditioned air blown out from the first outlet (b ') and the second outlet (c') is substantially equal.

(Problems to be Solved by the Invention) However, in the case where the protrusion (i) is provided as described above,
The first air passage (f ′) and the second air passage (g ′) are generated by the collision of the conditioned air with the protrusion (i) provided on the wall surface of the branch portion (h ′) of the first air passage (f ′). Since the conditioned air is diverted to and from the second air passage (g ') side, the projection (i) has a large shape with its tip protruding toward the second air passage (g') side when guiding the conditioned air to the second air passage (g ') side. Becomes Therefore, the protrusion (i) becomes the resistance of the conditioned air jetted in the first air passage (f '), and the increase in the rotation speed of the sirocco fan (e') in consideration of the resistance of this conditioned air and the protrusion There is a drawback that the air flow is disturbed due to the collision with (i), and the blowing noise of the conditioned air flowing in the first air passage (f ′) and the second air passage (g ′) becomes large.

The present invention has been made in view of the above point, and an object thereof is to positively suck the conditioned air toward the second air passage side on the wall surface of the second air passage facing the protrusion. It is an object of the present invention to improve and reduce the shape of the protrusion to reduce the blowing noise of the conditioned air flowing in the first and second air passages.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the solution means provided by the invention according to claim (1) is such that the first part is provided on both sides of the lower surface of the casing (1).
An outlet (2) and a second outlet (3) are provided respectively, and the first outlet (2) in the casing (1).
A heat exchanger (11) is disposed above the inner end surface of the heat exchanger (11), a sirocco fan (12) is disposed upstream of the heat exchanger (11), and the heat exchanger (11) is downstream of the heat exchanger (11). A first air passage (24) extending from the surface (11a) to the first outlet (2);
A second air passage (31) branching from the first air passage (24) to reach the second outlet (3) is provided, respectively, and a branch portion (41) of the first air passage (24). ), The conditioned air ejected by the sirocco fan (12) through the heat exchanger (11) onto the wall surface (22) of the first air passageway (2).
It is assumed that the air conditioner (A) is provided with the protrusions (42) for dividing the flow on the 4) side and the second air passage (31) side. A curved portion (43) having a radius (r) that allows the conditioned air to be sucked into the second air passage (31) by the Coanda effect is provided on the inner surface (32) of the second air passage that faces the protrusion (42). It is configured to be provided.

Further, the solution means of the invention according to claim (2) is that the radius (r) of the curved portion (43) is changed from the downstream surface (11a) of the heat exchanger (11) to the wall surface (22) of the casing (1). ) Is set within the range of 1 ≦ r / x ≦ 2.

Further, the solving means taken by the invention according to claim (3) is
A plurality of sirocco fans (12) are arranged, and a second air passage (31) is formed below each sirocco fan (12).

(Operation) With the above configuration, in the invention according to claim (1), the conditioned air ejected by the sirocco fan (12) into the first air passage (24) through the heat exchanger (11) is Approximately half of the conditioned air is blown out from the first outlet (2) through the first air passage (24) having the jet axis, and approximately half of the conditioned air is discharged from the first air passage (24) to the second air by the Coanda effect. The air will be sucked toward the second air passage (31) side along the curved portion (43) of the radius (r) of the inner surface (32) of the passage (31) and blown out from the second outlet (3). .

Thus, the second air passage (3
Since the inner surface (32) of (1) is provided with the curved portion (43) having the radius (r), approximately half of the conditioned air is supplied to the first air passage (2).
Since the air is positively sucked into the second air passageway (31) side from 4), the shape of the protrusion (42) required for guiding the conditioned air to the second air passageway (31) side is such that the tip has a first shape. 2 air passages (31)
It does not matter if it is small enough to assist the Coanda effect even if it does not overhang to the side, which reduces the resistance of the conditioned air that jets in the first air passage (24), and the rotation of the sirocco fan (12). It is not necessary to increase the number, and the turbulence of the air flow due to the collision with the protrusion (42) is suppressed, and the blowing noise of the conditioned air flowing in the first air passage (24) and the second air passage (31). Becomes small.

In the invention according to claim (2), the radius of the curved portion (43) is based on the distance (x) from the downstream surface (11a) of the heat exchanger (11) to the wall surface (22) of the casing (1). (R) is
Since it is set within the range of 1 ≦ r / x ≦ 2, the conditioned air is sucked toward the second air passage (31) side by the Coanda effect most effectively exerted, and the first and second air are more accurately The conditioned air can be evenly distributed to the passages (24) and (31).

Further, in the invention according to claim (3), the conditioned air from the heat exchanger (11) has a plurality of sirocco fans (12) and the first and second air passages (24), (31) respectively. ), The conditioned air is blown out in a wide range as described above, and the ceiling-embedded air conditioner (A) can be adapted according to the size and needs of the installation room. .

(Effect of the invention) As described above, according to the air conditioner of the first aspect, the radius (r) is formed on the inner surface (32) of the second air passage (31) facing the protrusion (42). By providing the curved portion (43) of the second air passage (31), substantially half of the conditioned air jetted through the first air passage (24) is curved by the Coanda effect on the second inner side surface (32) of the second air passage (31). Since the air is sucked toward the second air passageway (31) along the side (43), the shape of the protrusion (42) becomes small enough to assist the Coanda effect, and the resistance of the conditioned air becomes small. The rotation speed of 12) and the turbulence of the airflow are suppressed, and the blowing noise of the conditioned air flowing in the first air passage (24) and the second air passage (31) can be reduced.

According to the air conditioner of claim (2), the radius (r) of the bending portion (43) is set to the downstream surface (11a) of the heat exchanger (11).
Since it is set within the range of 1≤r / x≤2 based on the distance (x) from the wall surface (22) of the casing (1) to the second air passageway (31), the Coanda effect is most effectively exhibited. Since the conditioned air is sucked to the side, the conditioned air can be more evenly distributed to the first and second air passages (24) and (31).

Further, according to the air conditioner of claim (3), it has a plurality of sirocco fans (12), and the conditioned air from the heat exchanger (11) is supplied to the first and second air passages (24), respectively.
Since it is substantially evenly distributed over a wide range through (31), the ceiling-embedded air conditioner (A) can be adapted to the size and needs of the installation room.

(Example) Hereinafter, the Example of this invention is described based on drawing.

FIG. 1 shows an embodiment of a ceiling-embedded air conditioner using the flow dividing device according to the invention of claims (1) to (3),
(1) is a casing of a substantially rectangular air conditioner (A) having a longitudinal direction in the longitudinal direction (in the drawing, a frontward and rearward direction) in a plan view, and a lower surface plate (1a) of the casing (1) is , Is attached to the lower surface side of the ceiling plate (B). A first air outlet (2) and a second air outlet (3) are formed in the vertical direction at both side ends (left and right side ends) of the lower plate (1a) of the casing (1). Further, at the central portion of the lower plate (1a) of the casing (1) and at the first outlet (2)
An intake port (4) is provided between the second outlet port (3) and the second outlet port (3), and an air filter (5) is provided downstream of the intake port (4).

In the casing (1) located above the inner end surface side of the first outlet (2), an indoor heat exchanger (11) (acting as an evaporator during cooling operation and acting as a condenser during heating operation) ( A heat exchanger) is provided, and the downstream surface (11a) of the indoor heat exchanger (11) is the first outlet (2).
Upright in a direction facing the inner end surface of the. Also,
A blower (12) made of a sirocco fan is provided on the upper right side of the casing (1) on the upstream side of the indoor heat exchanger (11). Further, an outdoor unit including an outdoor heat exchanger (not shown) and a compressor (not shown) is connected to the indoor heat exchanger (11) through a refrigerant pipe (not shown) so that the refrigerant can flow. The suction port (13) of the blower (12) is open to the room through an air suction passage (not shown) and the air filter (5), and the blower port (14) of the blower (12) is a partition. Board (1
It communicates with the upstream side of the indoor heat exchanger (11) through a chamber section (16) partitioned by 5).

Further, on the downstream side of the indoor heat exchanger (11), the downstream surface (11a) of the indoor heat exchanger (11) and the casing (1).
Outer wall surface (22) that also serves as the left side surface of the casing, a first front side surface (not shown) and a first rear surface that are integrally formed on both side surfaces of the outer wall surface (22) and extend to the right side surface of the casing (1). The first air passageway (24) having a substantially square cross section, which is formed by the side surface (23)
Is provided so as to extend in the vertical direction, and the first air passage (24) (the outer wall surface (22), the first front side surface and the first back side surface (23)) is connected to the first outlet (2). It is connected.

Further, at a lower portion of the first air passage (24), a direction substantially perpendicular to the first air passage (24) (second air outlet (3)) is provided.
The same number of second air passages (31) branching to the side) are provided under the blower (12) as the number of the second air passages (31) is substantially rectangular. The second air passage (31) is connected to the lower end of the downstream surface (11a) of the indoor heat exchanger (11) and extends to the second outlet (3) side, which is a substantially perpendicular direction, to the inner side surface (32). )When,
Outer side surfaces (33) that substantially match the height of the upper surface of the air filter (5) and have left and right end portions connected to the inner end surface of the first outlet (2) and the inner end surface of the second outlet (3), respectively. When,
A second front side surface (not shown) and a second back side surface (34) integrally formed on both side surfaces of the outer side surface (33) and extending upward.

The second air passage (31) of the first air passage (24)
The outer wall surface (22) of the side branching part (41) is provided with a substantially triangular protrusion (42) whose tip projects toward the second air passageway (31). In addition, the inner surface (32) (wall surface) of the second air passage (31) facing the protrusion (42) has a radius (r) that allows the conditioned air to be sucked into the second air passage (31) by the Coanda effect. The curved portion (43) is provided. The radius (r) of the curved portion (43) is the distance (x) from the downstream surface (11a) of the indoor heat exchanger (11) to the outer wall surface (22) (left side surface of the casing (1)). 1 ≦ r / based on
It is set within the range of x ≦ 2.

Incidentally, (44) is a louver that guides the blowing direction of the conditioned air from the first outlet (2) and the second outlet (3).

Next, the operation and effect of the above embodiment will be described. Indoor air is sucked into the suction port (13) of the blower (12) through the suction port (4) of the casing (1), and then the blower (12)
About half of the conditioned air that has undergone heat exchange from the suction port (14) of the indoor heat exchanger (11) and is jetted from the indoor heat exchanger (11) into the first air passageway (24) has a jet axis. Is blown out from the first outlet (2) through the first air passage (24), and about half of the inner surface of the first air passage (24) to the inner surface of the second air passage (31) due to the Coanda effect ( It is sucked toward the second air passageway (31) along the curved portion (43) having the radius (r) of 32) and is blown out from the second air outlet (3).

Thus, the second air passage (3
By providing the curved portion (43) having the radius (r) on the inner surface (32) of (1), almost half of the conditioned air is in the first air passage (24).
Since it is positively sucked from the second air passage (31) side,
The shape of the protrusion (42) required to guide the conditioned air to the second air passage (31) side is such that the Coanda effect is assisted without the tip being overhanging to the second air passage (31) side. The air resistance of the conditioned air jetted in the first air passage (24) is reduced, and it is not necessary to increase the rotation speed of the sirocco fan (12), and the protrusion (42) The flow of the air flow due to the collision with the air can be suppressed, and the blowing noise of the conditioned air flowing in the first air passage (24) and the second air passage (31) can be reduced.

In addition, the radius (r) of the bending portion (43) is equal to the indoor heat exchanger (1
Distance (x) from the downstream surface (11a) of 1) to the outer wall surface (22)
Is set within the range of 1 ≦ r / x ≦ 2, the conditioned air is sucked toward the second air passage (31) side by the most effective Coanda effect, and more accurately The conditioned air can be evenly distributed to the second air passages (24) and (31).

Furthermore, the air conditioner (A) has three blowers (12), and the conditioned air that has passed through the indoor heat exchanger (11) by the blowers (12) is the first and second air passages (24). , (31) are evenly distributed, so that the conditioned air is blown out in a wide range as described above, and it is possible to meet the size and needs of the installation room.

In the above embodiment, the blower (12) and the indoor heat exchanger (1
Although the air conditioner (A) having three each of 1) and 1) is configured, an air conditioner having one blower and one indoor heat exchanger or two or more (excluding three) each is provided. Of course, it may be configured.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an air conditioner showing an embodiment of the present invention. 2 and 3 are equivalent to FIG. 1 showing a conventional example. (1) …… Casing (2) …… First outlet (3) …… Second outlet (11) …… Indoor heat exchanger (11a) …… Downstream surface (12) …… Blower (22)… … Outer wall surface (24) …… First air passageway (31) …… Second air passageway (32) …… Inner side surface (41) …… Branching portion (42) …… Projection portion (43) …… Burning portion ( A) …… Air conditioner (r) …… Radius (x) …… Distance

Claims (3)

[Claims] 1. A first air outlet (2) and a second air outlet (3) are provided on both sides of the lower surface of the casing (1), and the first air outlet (2) in the casing (1) is The heat exchanger (11) is arranged above the inner end face side, and
A sirocco fan (12) is arranged on the upstream side of the heat exchanger (11), and a first air passage (from the downstream surface (11a) of the heat exchanger (11) to the first outlet (2) ( 24) and the first
A second air passage (31) that branches from the air passage (24) to reach the second outlet (3) is provided, and the wall surface of the branch portion (41) of the first air passage (24). (22),
A projection (42) for dividing the conditioned air ejected by the sirocco fan (12) through the heat exchanger (11) into the first air passage (24) side and the second air passage (31) side, respectively.
In the air conditioner provided with, the protrusion (42)
A curved portion (43) having a radius (r) that allows the conditioned air to be sucked into the second air passageway (31) by the Coanda effect is provided on the inner surface (32) of the second air passageway (31) that faces the second air passageway (31). An air conditioner characterized by the above. 2. The radius (r) of the curved portion (43) is changed from the downstream surface (11a) of the heat exchanger (11) to the wall surface (2) of the casing (1).
2. The air conditioner according to claim 1, wherein the air conditioner is set within the range of 1 ≦ r / x ≦ 2 based on the distance (x) to 2). 3. A plurality of sirocco fans (12) are arranged, and a second air passage (31) is formed below each sirocco fan (12). )
The air conditioner described.