JP3070508B2 - Ventilation guide blade structure of air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow-off guide blade structure for an air conditioner, and more particularly, to a blow-out guide blade structure that does not generate dew during cooling operation.

[0002]

2. Description of the Related Art For example, an in-ceiling type air conditioner shown in FIG. 12 has an air conditioner main body 1 installed above an opening 3 formed in a ceiling C and a lower surface of the air conditioner main body 1. A fan 4 and a heat exchanger 5 are disposed in the air conditioner main body 1, while the decorative panel 2 has an air inlet 6 and an air outlet. 7 are formed. In this ceiling-embedded air conditioner, the conditioned air W obtained by cooling or heating the air sucked from the air suction port 6 by the heat exchanger 5 is supplied to the outlet passage 8 in the air conditioner body 1 and The air is blown out into the room through the air outlet 7 of the decorative panel 2.

[0003] The air outlet 7 is provided with outlet guide blades 9 for controlling the direction of the outlet air flow W and the like, and the set angle of the outlet guide blades 9 is variable. An air conditioner having such a structure is disclosed in JP-A-3-316.
No. 45, for example.

[0004] In general, it is important that the blow-out guide blades not only have good controllability of blow-out air flow and low ventilation resistance, but also that dew condensation hardly occurs on the surface of the blow-out guide blades during cooling operation. However, it is not easy to satisfy these three requirements at the same time. In particular, with respect to dew condensation, a method has been conventionally employed in which the surface of the blades is planted with flocks to prevent dripping of dew condensation water. However, there has been a problem that dirt is easily formed and cleaning is difficult.

[0005]

However, in the case of the blowing guide blade 9 having the above-described structure, as shown in FIG. 13, when the deflection angle θ in the outflow direction with respect to the inflow direction of the blowing airflow W during the cooling operation is large. Separation of the air flow occurs on the surface of the blade 9, and the room air Wr (air having a higher temperature than the blown air flow W) is entrapped at the location, causing dew condensation on the surface of the blade 9 cooled by the blown air flow W. It will be.

In order to prevent the above-mentioned dew condensation from occurring, it is important to form a so-called cold air seal that encloses the blade surface with cool air (in other words, a blown air flow). It is important to prevent airflow separation at the point. In particular, when the deflection angle of the blown air flow is set to be large, air flow separation easily occurs on the blade surface.

Japanese Patent Application Laid-Open No. 3-31645 discloses a structure in which a slit is provided on the blade surface to prevent air flow separation. However, since the measures for the inflow portion are insufficient, the deflection angle is reduced. If it is large, it is not considered very effective.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and prevents air flow separation irrespective of the magnitude of the deflection angle of the blown air flow, and suppresses the occurrence of dew condensation during cooling operation as much as possible. The purpose is to enable airflow control.

[0009]

According to the basic structure of the present invention, as a means for solving the above-mentioned problem, an air outlet guide provided at an air outlet 7 of an air conditioner for controlling the direction of the air flow W is provided. The blades 9 are fixed blades 10 positioned on the inflow side of the blown air flow W and smoothly guiding the inflow air flow, and movable blades 11 positioned on the outflow side of the blown air flow W and controlling the direction of the blown air flow W. And
A slit 12 is formed between the fixed blade 10 and the movable blade 11 as a passage for the blown air flow W.

With the above configuration, the angle of the movable blade 11 can be changed according to the deflection angle θ of the blown air flow W, so that the blown air flow W can be blown in any state. Even when the flow flowing into the guide blades 9 is smooth and the resistance is reduced, and even when the deflection angle θ is increased, the air flow on the surface of the blow-out guide blades 9 is caused by the presence of the air flow flowing through the slits 12. Since the separation does not occur, the cool air seal is maintained during the cooling operation, and the dew condensation on the surface of the blowing guide blade 9 can be prevented. Moreover, since there is no air flow separation on the surface of the blow-out guide blade 9, generation of turbulent noise from the surface of the blow-out guide blade 9 is reduced.

In the basic structure of the present invention,
When the deflection angle θ in the outflow direction with respect to the inflow direction of the blown air flow W is large, the slit 12
It is set to be large so that a flow for preventing separation on the surface can be obtained. Then, when the deflection angle θ is large, the airflow flowing through the slit 12 is
This prevents air flow separation on the surface of No. 1 and secures a cool air seal during cooling operation.

Further, the slit 12 is provided with a blown air flow W
When the deflection angle θ in the outflow direction with respect to the inflow direction is small, the air flow becomes narrow to such an extent that air cannot flow.
By doing so, when the deflection angle θ is small, the blown air flow W flows along the surfaces of the fixed blades 10 and the movable blades 11, air flow separation is prevented, and a cool air seal during cooling operation can be secured.

Further, the movable blade 11 is provided with an airflow W
When the deflection angle θ in the outflow direction with respect to the inflow direction is small, the fixed blade 10 moves in a substantially straight line with the fixed blade 10, and when the deflection angle θ is small, the fixed blade 10 moves.
The movable blade 11 and the movable blade 11 are arranged in a substantially straight line as if they constitute one blade, and separation of the blown air flow W on the blade surface can be effectively prevented.

When a ridge 17 extending in a direction perpendicular to the blown air flow W is formed on one surface of the movable blade 11, the blown air flow W is disturbed by the ridge 17 and a laminar boundary layer is formed. It changes to a boundary layer, and airflow separation on the blade surface can be more effectively prevented.

Furthermore, the air flow W of the movable blade 11
When the end on the side where the air flows in is curved, the movable blade 1
1, the flow of the air flow diverted to both upper and lower sides becomes smooth, and a flow is obtained that prevents separation on both surfaces of the movable blade 11 regardless of the magnitude of the deflection angle θ in the outflow direction with respect to the inflow direction of the blown air flow W. As a result, airflow separation on the upper and lower surfaces of the movable blade 11 is prevented, and a cool air seal can be secured during the cooling operation.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First Embodiment FIG. 1 shows a blowout guide blade structure of an air conditioner according to a first embodiment of the present invention.

The outlet guide blades 9 are provided at the air outlet 7 of the ceiling-mounted type air conditioner described in the section of the prior art, and control the direction of the outlet air flow W and the like. The stationary blade 10 is located on the inflow side of the airflow W and smoothly guides the inflow airflow, and the movable blade 11 is located on the outflow side of the blowing airflow W and controls the direction of the blowing airflow W. Moreover, a slit 12 is formed between the fixed blade 10 and the movable blade 11 to be a passage of the blown air flow W.

The fixed blade 10 has an aerofoil cross section, and the movable blade 11 attached by fixing both ends to both sides of the air outlet 7 has a leaf cross section. In addition, the bracket 14 is attached to the air outlet 7 by pivotally supporting the bracket 14 projecting at both ends thereof to the both ends of the air outlet 7 via a swing shaft 13.

The movable blade 11 is swung about the swing shaft 13 in a range indicated by dotted arrows M and N in accordance with a deflection angle θ in the outflow direction with respect to the inflow direction of the blown air flow W. The slit 12 formed between the fixed blade 10 and the movable blade 11 is narrowed so that air cannot flow when the deflection angle θ is small (see FIG. 2). When the angle θ is large, the flow is made large (see FIG. 3) so that a flow for preventing separation on the surface of the movable blade 11 is obtained.

The following effects can be obtained by the blow-out guide blade structure configured as described above.

(I) When the Deflection Angle θ of the Blowing Air Flow W is Small At this time, the movable blade 11 swings about the swing shaft 13 in the direction of the dotted arrow M (see FIG. 1). As shown, the outflow side portion of the fixed blade 10 and the inflow side portion of the movable blade 11 overlap, and the slit 12 is narrowed to such an extent that air cannot flow.

In this state, the blown air flow W flows smoothly along the surfaces of the fixed blades 10 and the movable blades 11, thereby reducing the ventilation resistance and suppressing the air flow separation on the blade surfaces. This means that a cool air seal can be secured during the cooling operation. Therefore, the entrainment of indoor air does not occur, and dew condensation on the blade surface can be effectively prevented without performing hair transplantation or the like.
In the ceiling-mounted type air conditioner, the operation state in which the deflection angle θ of the blown air flow W is small is often in the heating operation and is small in the cooling operation, so there is little problem of dew condensation. Even if the angle θ is reduced, the prevention of dew condensation can be sufficiently expected as described above. Moreover, since there is no air flow separation on the surface of the blow-out guide blade 9, generation of turbulent noise from the surface of the blow-out guide blade 9 is reduced.

(II) When the deflection angle θ of the blown airflow W is large At this time, the movable blade 11 is swung about the swing shaft 13 in the direction of the dotted arrow N (see FIG. 1). As shown, the slit 12 formed between the outflow side portion of the fixed blade 10 and the inflow side portion of the movable blade 11 becomes large.

In this state, the blown air flow W smoothly flows along the surfaces of the fixed blade 10 and the movable blade 11, and the air flow flowing through the slit 12 flows into the lower surface of the movable blade 11, and As the resistance decreases, airflow separation on the blade surface, which tends to occur due to the increased deflection angle θ, is suppressed, and a cool air seal can be secured during the cooling operation. Therefore, the entrainment of indoor air does not occur, and dew condensation on the blade surface can be effectively prevented without performing hair transplantation or the like. In the ceiling-mounted air conditioner, the blown air flow W
Since the operation state in which the deflection angle θ is increased is almost the time of the cooling operation, the above described dew condensation preventing action by the cold air seal is effective. Moreover, since there is no air flow separation on the surface of the blow-out guide blade 9, generation of turbulent noise from the surface of the blow-out guide blade 9 is reduced.

Second Embodiment FIGS. 4 and 5 show a blow-out guide blade structure of an air conditioner according to a second embodiment of the present invention.

In this case, a protrusion 15 for maintaining the interval between the slits 12 is formed at the inflow side end of the movable blade 11. A guide groove 16 for guiding the protrusion 15 is formed on one surface of the fixed blade 10 (ie, a surface facing the movable blade 11). The guide groove 1
6 is made deeper from the lower end to the upper end so that the interval between the slits 12 becomes smaller as the movable blade 11 swings in the direction of the dotted arrow M. The plurality of protrusions 15 and guide grooves 16 are formed at predetermined intervals in the longitudinal direction of the movable blade 11 and the fixed blade 10. With this configuration, the fixed blade 1 which is a relatively long member
The interval between the slits 12 formed between the movable blade 11 and the movable blade 11 can be reliably maintained. The protrusion 15 and the guide groove 16 are respectively connected to the fixed blade 10 and the movable blade 11.
May be formed. The other configuration and operation and effect are the same as those in the first embodiment, and the description is omitted.

Third Embodiment FIG. 6 shows a blow-out guide blade structure of an air conditioner according to a third embodiment of the present invention.

In this case, on one surface (ie, the lower surface) of the movable blade 11, a ridge 1 extending in a direction orthogonal to the blown air flow W is provided.
7 are formed. With this configuration,
The blown air flow W is disturbed by the ridges 17 and the laminar boundary layer changes to a turbulent boundary layer, whereby air flow separation on the blade surface is more effectively prevented. In addition, if this embodiment and the second embodiment are used together, a more preferable blowing guide blade structure can be obtained. The other configuration and operation and effect are the same as those in the first embodiment, and the description is omitted.

Fourth Embodiment FIGS. 7 and 8 show a blow-out guide blade structure of an air conditioner according to a fourth embodiment of the present invention.

In this case, the brackets 14 provided on the upper ends on both sides of the movable blade 11 are pivotally supported on the lower ends on both sides of the fixed blade 10 via the swing shaft 13 so as to be swingable. Slit 12 between the movable blade 11
Is formed. Therefore, the movable blade 11
When the deflection angle θ of the outflow direction with respect to the inflow direction of the blown air flow W is small, the blown air flow W moves so as to be substantially linear with the fixed blade 10.

In this manner, when the deflection angle θ is small, as shown in FIG. 9, the interval between the slits 12 becomes so small that air cannot flow, so that the fixed blade 10 and the movable blade 11 The blades are arranged in a substantially straight line so as to form the blades, so that separation of the blown air flow W on the blade surface can be effectively prevented. In the ceiling-mounted type air conditioner, the operation state in which the deflection angle θ of the blown air flow W is small is often in the heating operation and is small in the cooling operation, so there is little problem of dew condensation. Even if the angle θ is reduced, it is possible to sufficiently prevent dew condensation as described above. Moreover, since there is no air flow separation on the surface of the blow-out guide blade 9, generation of turbulent noise from the surface of the blow-out guide blade 9 is reduced.

On the other hand, when the deflection angle θ is large, FIG.
As shown in FIG. 0, the interval between the slits 12 formed between the fixed blade 10 and the movable blade 11 increases, and the blown air flow W flows smoothly along the surfaces of the fixed blade 10 and the movable blade 11. At the same time, the airflow flowing through the slit 12 flows into the lower surface of the movable blade 11 to reduce the ventilation resistance and suppress the airflow separation on the blade surface, which tends to occur due to the increased deflection angle θ. . Therefore, during the cooling operation, a cool air seal can be secured, and the entrapment of indoor air does not occur, so that dew condensation on the blade surface can be effectively prevented without flocking or the like. Since the operation state in which the deflection angle θ of the blown air flow W is increased in the ceiling-mounted air conditioner is almost at the time of the cooling operation, the above described dew condensation preventing action by the cold air seal is effective. Moreover,
Since there is no air flow separation on the surface of the blow-out guide blade 9, generation of turbulent noise from the surface of the blow-out guide blade 9 is reduced.

Fifth Embodiment FIG. 11 shows a blowout guide blade structure of an air conditioner according to a fifth embodiment of the present invention.

In this case, on one surface (ie, the lower surface) of the movable blade 11, a ridge 1 extending in a direction orthogonal to the blown air flow W is provided.
7 are formed. With this configuration,
The blown air flow W is disturbed by the ridges 17 and the laminar boundary layer changes to a turbulent boundary layer, whereby air flow separation on the blade surface is more effectively prevented. The other configuration and operation and effect are the same as those in the fourth embodiment, and thus the description is omitted.

In the above description, the outlet guide blade structure in the ceiling-mounted air conditioner is described as an embodiment. However, the present invention is directed to another type (for example, a ceiling-suspended air conditioner). Is also applicable.

[0037]

According to the present invention, the outlet guide vanes 9 provided at the air outlet 7 of the air conditioner for controlling the direction of the outlet air flow W are located on the inflow side of the outlet air flow W, and The stationary blades 10 and the movable blades 11 are constituted by fixed blades 10 that smoothly guide the inflow air flow and movable blades 11 that are located on the outflow side of the blown air flow W and control the direction of the blown air flow W. A slit 12 serving as a passage of the blown air flow W is formed between the movable blade 11 and the movable blade 11 so that the angle of the movable blade 11 can be changed according to the deflection angle θ of the blown air flow W. Regardless of the state of the blow angle, the flow flowing into the blow guide blade 9 becomes smooth and the resistance decreases, and when the deflection angle θ is large, the air flow flowing through the slit 12 causes the flow of the blow guide blade 9. On the surface Since the airflow separation does not occur, the cool air seal is maintained during the cooling operation, and there is an excellent effect that dew condensation on the surface of the blowing guide blade 9 can be prevented.

Further, since there is no air flow separation on the surface of the blow-out guide blade 9, there is also an effect that generation of turbulent noise from the surface of the blow-out guide blade 9 is reduced.

In the present invention, the slit 12
When the deflection angle θ in the outflow direction with respect to the inflow direction of the blown air flow W is small, the air flow becomes narrow to such an extent that air cannot flow. By doing so, when the deflection angle θ is small, the blown air flow W flows along the surfaces of the fixed blades 10 and the movable blades 11, whereby air flow separation is prevented, and a cold air seal can be secured during cooling operation. Is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a blow-off guide blade structure of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a state in which the angle of deflection is small in the outlet guide blade structure of the air conditioner according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which the angle of deflection is large in the outlet guide blade structure of the air conditioner according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating a blow-out guide blade structure of an air conditioner according to a second embodiment of the present invention.

FIG. 5 is an essential part perspective view showing a blow-out guide blade structure of an air conditioner according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating a blow-out guide blade structure of an air conditioner according to a third embodiment of the present invention.

FIG. 7 is a cross-sectional view illustrating a blow-out guide blade structure of an air conditioner according to a fourth embodiment of the present invention.

FIG. 8 is an essential part perspective view showing a blow-out guide blade structure of an air conditioner according to a fourth embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a state in which the angle of deflection is small in a blow-out guide blade structure of an air conditioner according to a fourth embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a state in which the air outlet guide blade structure of the air conditioner according to the fourth embodiment of the present invention has a large deflection angle.

FIG. 11 is a cross-sectional view illustrating a blow-out guide blade structure of an air conditioner according to a fifth embodiment of the present invention.

FIG. 12 is a longitudinal sectional view showing a conventional ceiling-mounted air conditioner.

FIG. 13 is a sectional view showing a blow-out guide blade structure of a conventional air conditioner.

[Explanation of symbols]

7 is an air outlet, 9 is a blowing guide blade, 10 is a fixed blade,
11 is a movable blade, 12 is a slit, 15 is a protrusion, 17 is a ridge, W is a blown air flow, and θ is a deflection angle.

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tomohiro Suzuki 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries Co., Ltd.Kanaoka Plant (72) Inventor Tatsuo Fujiwara 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries (56) References JP-A-3-95350 (JP, A) JP-A-6-58617 (JP, A) JP-A 63-46748 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) F24F 13/14

Claims (4)

(57) [Claims] An outlet guide vane (9) provided at an air outlet (7) of an air conditioner for controlling a direction of an outlet air flow (W) and the like is located on an inflow side of the outlet air flow (W). And a movable vane (11) located on the outflow side of the blown air flow (W) and controlling the direction of the blown air flow (W). configuration, and further the fixed blade (10) and said movable blade (1
Between the 1), as well as such a slit for passage of the outlet air flow (W) (12) is formed, the movable
The blades (11) are arranged in the direction in which the blown air flow (W) flows.
The deflection angle (θ) depends on the deflection angle (θ) in the outflow direction.
When it is large, peeling on the surface of the movable blade (11) is prevented.
The slit (12) is large so that a flow
When the deflection angle (θ) is small, air cannot flow.
Swing so that the slit (12) becomes as narrow as possible
The air outlet guide blade structure of the air conditioner, characterized in that 2. The movable blade (11) has a swing shaft (1).
3) the rocking motion via a bracket (14) pivotally supported by
Characterized in that it can be swung around an axis (13).
The blow-out guide blade structure of the air conditioner according to claim 1, wherein
Build. 3. The flow of the blown air flow (W) in the inflow direction.
When the deflection angle (θ) in the exit direction is small, the movable blade
The outflow side of the fixed blade (10) by the swing of (11).
And the inflow side portion of the movable blade (11)
The slit (12) is too narrow to allow air flow
3. The method according to claim 1, wherein:
The air-outlet guide vane for an air conditioner according to any one of the above.
Construction. 4. The movable blade (11) moves so as to be substantially in line with the fixed blade (10) when the deflection angle (θ) of the outflow direction with respect to the inflow direction of the blown air flow (W) is small. The blow-out guide blade structure for an air conditioner according to any one of claims 1 and 2 , wherein