JP7250438B2 - air conditioner - Google Patents

Description

The present invention relates to an air conditioner.

The air conditioner has a built-in blower, and the blower blows air into the room. In general, the higher the number of revolutions of the blower, the higher the air volume, but the noise generated from the blower also increases.

Patent Literature 1 below describes that a large number of grooves are formed on the guide surface of the blower flap because the blown air is significantly turbulent at both ends of the flap in the longitudinal direction and noise is generated.

Further, Patent Document 2 below discloses a technique in which a plurality of rectifying vanes are provided on the surface of the horizontal blades on which the discharged air hits. This prevents turbulence caused by part of the discharged air running sideways due to uneven air intakes, heat exchangers, or fan shapes in the longitudinal direction of the air conditioner. do.

Further, Japanese Patent Application Laid-Open No. 2002-200001 discloses a technique in which a rectifying plate is provided at an angle with respect to the cross-flow fan in the flow path on the air blowing side. This reduces the noise generated by the turbulence of the wind in the vicinity of the fan plate.

JP-A-8-254352 Japanese Utility Model Laid-Open No. 57-174934 JP-A-11-270870

In Patent Documents 1 to 3, long and narrow grooves and rectifying plates are provided for the purpose of reducing noise generated at a portion through which blown air flows or hits. On the other hand, as described above, some of the noise generated in the air conditioner is caused by the blower, so it is desirable to be able to reduce the noise generated by the blower while maintaining or increasing the air volume from the outlet.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it is an object of the present invention to provide an air conditioner that can reduce the noise generated by the blower while maintaining or increasing the air volume from the outlet. aim.

In order to solve the above problems, the air conditioner of the present invention employs the following means.
That is, an air conditioner according to the present invention includes an air outlet, and an air direction adjusting plate installed at the air outlet and capable of changing the flow direction of the blown air. A projection having an elongated streamline shape is formed along the flow direction of the tube.

According to this configuration, the airflow direction adjusting plate installed at the outlet is a plate material that can change the flow direction of the blown air, and the surface of the airflow direction adjusting plate has an elongated streamline shape along the air flow direction. A protrusion is formed having a As a result of this, the air blown out from the outlet flows along the airflow direction adjusting plate, and as a result, the protrusion constantly generates turbulence on the surface of the airflow direction adjusting plate on the downstream side of the protrusion. Since the protrusion suppresses boundary layer separation and maintains a turbulent boundary layer, separation of the air flow is delayed on the surface of the wind direction adjusting plate, and air resistance is reduced.

Therefore, the air flows easily along the airflow direction adjusting plate, and the air volume flowing along the airflow direction adjusting plate can be increased as compared with the air volume adjusting plate having no protrusion. Therefore, even if the number of rotations of the blower is the same as in the conventional art, the air volume can be increased, and the noise caused by the blower can be reduced.

In addition, since the air resistance is reduced on the surface of the airflow direction adjusting plate, it becomes difficult for the air outside the outlet to be involved. As a result, high-humidity air does not come into contact with the blowout port during cooling operation, and dew condensation occurring at the blowout port can be suppressed.

An air conditioner according to the present invention includes an air outlet, and an air direction adjusting plate installed at the air outlet and capable of changing the flow direction of the blown air. Protrusions are formed that generate turbulence and suppress boundary layer separation.

In the above invention, a plurality of the protrusions may be arranged in a direction perpendicular to the air flow direction.

According to this configuration, even when the airflow direction adjusting plate is an elongated plate material elongated in the direction perpendicular to the direction of air flow, the air resistance can be reduced over almost the entire region in the longitudinal direction of the airflow direction adjusting plate. can.

In the above invention, the protrusion may be formed only on one side of the wind direction adjusting plate.

According to this configuration, the protrusion is formed only on one side of the airflow direction adjusting plate, and the amount of air that hits the one surface of the airflow direction adjusting plate on which the protrusion is formed is further increased. It is sufficient that the protrusion is provided in the direction where the air volume is desired to be increased.

ADVANTAGE OF THE INVENTION According to this invention, the noise which generate|occur|produces from an air blower can be reduced, maintaining or increasing the air volume from a blower outlet.

1 is a perspective view showing an indoor unit of an air conditioner according to one embodiment of the present invention; FIG. FIG. 2 is a partially enlarged perspective view showing the indoor unit according to one embodiment of the present invention, showing the vicinity of the outlet. Fig. 3 is a perspective view showing an air outlet and a louver of the indoor unit according to one embodiment of the present invention; FIG. 4 is a plan view showing a louver and projections according to one embodiment of the present invention; FIG. 4 is a side view showing a louver and protrusions according to one embodiment of the present invention;

EMBODIMENT OF THE INVENTION Below, embodiment which concerns on this invention is described with reference to drawings.
As shown in FIGS. 1 and 2, an indoor unit 1 of an air conditioner according to an embodiment of the present invention includes a housing 2, a fan (not shown) and a heat exchanger built in the housing 2. (not shown). Further, the housing 2 of the indoor unit 1 is formed with a suction port 3 for taking in outside air into the housing 2 and a blowing port 4 for blowing air after heat exchange from the housing 2 to the outside.

External air is taken into the housing 2 via the suction port 3 by a blower. As the air taken in by the blower passes through the heat exchanger, it exchanges heat with the refrigerant flowing through the heat exchanger. During cooling operation, the air is cooled by the refrigerant, and during heating operation, the air is heated by the refrigerant. The air that has passed through the heat exchanger is blown out from inside the housing 2 through the outlet 4 .

A flap 5 and a louver 6 are installed at the blowout port 4 to change the flow of blown air. Both the flap 5 and the louver 6 are examples of the wind direction adjusting plate.

The flap 5 is an elongated plate-like member, and is installed in the outlet 4 such that its longitudinal direction is parallel to the horizontal direction. The flap 5 rotates around an axis parallel to the longitudinal direction of the flap 5 . Thereby, the flap 5 can adjust the wind direction of the air blown out from the outlet 4 in the vertical direction.

The louver 6 is an elongated plate-like member, and is installed at the outlet 4 such that its longitudinal direction is parallel to the vertical direction. The louver 6 rotates around an axis parallel to the longitudinal direction of the louver 6 . Thereby, the louver 6 can adjust the wind direction of the air blown out from the outlet 4 in the horizontal direction.

Only one of the flap 5 and the louver 6 may be installed on the outlet 4 .

On the surfaces of the flap 5 and the louver 6, as shown in FIGS. 3 to 5, projections 7 having an elongated streamline shape are formed. 1 and 2, projections 7 on the surfaces of the flaps 5 and louvers 6 are omitted.
Below, the case where the protrusion 7 is formed on the surface of the louver 6 will be described. The protrusions 7 formed on the surface of the flap 5 also have the same configuration and effects.

The projecting portion 7 has an elongated streamline shape along the flow direction of the air blown out from the outlet 4 and protrudes from the smooth plate surface of the louver 6 in a convex shape. The protruding portion 7 has a hemispherical tip located on the upstream side in the air flow direction and a sharp rear end located on the downstream side. That is, the protrusion 7 gradually increases in width and height from the tip to the middle , reaches its maximum width and height around the middle, and gradually decreases in width and height from the middle to the rear end. formed in

The length of the protrusion 7 is shorter than the width of the louver 6 in the lateral direction, and only one protrusion 7 is arranged within the width of the louver 6 in the lateral direction.

The protrusion 7 is a vortex generator (also called a vortex generator, an aero stabilizing fin, etc.). Due to the formation of the protrusions 7 described above, the air blown out from the outlet 4 flows along the louvers 6 , and turbulence is always generated on the surface of the wind direction adjusting plate on the downstream side of the protrusions 7 . Since the projections 7 suppress boundary layer separation and maintain a turbulent boundary layer, separation of the air flow is delayed on the surface of the louver 6 and air resistance is reduced.

Therefore, the air can easily flow along the louver 6, and the amount of air flowing along the louver 6 can be increased compared to a louver without the protrusions 7 formed thereon. Therefore, even if the number of revolutions of the blower is kept the same, the air volume from the outlet 4 can be increased compared to the conventional one. Moreover, when maintaining air volume compared with the past, the rotation speed of an air blower can be reduced. Therefore, according to this embodiment, the noise caused by the blower can be reduced.

In addition, since the air resistance is reduced on the surface of the louver 6, it becomes difficult for the air outside the outlet 4 to be involved. As a result, high-humidity air does not come into contact with the blowout port 4 during cooling operation, and dew condensation occurring at the blowout port 4 can be suppressed.

A plurality of protrusions 7 are arranged in the longitudinal direction of the louver 6, that is, in the direction perpendicular to the direction of air flow. As a result, even when the louver 6 is an elongated plate material elongated in the direction perpendicular to the direction of air flow, the air resistance can be reduced over almost the entire region of the louver 6 in the longitudinal direction.

Depending on the length of the louver 6 in the longitudinal direction, only one protrusion 7 may be arranged within the length of the louver 6 in the longitudinal direction instead of a plurality of protrusions 7 .

Furthermore, the protrusions 7 may be formed on both sides of the louver 6 or may be formed on only one side of the louver 6 . Accordingly, if the protrusions 7 are formed on both sides of the louver 6, the air volume can be increased in the extending direction of the plate surface of the louver 6. As shown in FIG. Further, when the protrusions 7 are formed only on one side of the louver 6, the amount of air that hits the one side of the louver 6 on which the protrusions 7 are formed increases. That is, it is sufficient that the protrusion 7 is provided on the surface on which the air volume is desired to be increased.

Although the protrusion 7 described above has an elongated streamline shape and protrudes from the smooth plate surface of the flap 5 or louver 6, the present invention is not limited to this example. As a result of the air blown out from the outlet flowing along the airflow direction adjusting plate, turbulence is constantly generated on the surface of the airflow direction adjusting plate on the downstream side of the projection, and boundary layer separation is suppressed, resulting in turbulent flow. Any other shape may be used as long as it has a shape that maintains a uniform boundary layer. For example, it protrudes in a convex shape from the smooth plate surface of the flap 5 or louver 6, and has an elliptical and semi-elliptical shape when viewed from above, and a diamond and quadrangular pyramid shape when viewed from above. .

1: Indoor unit 2: Housing 3: Suction port 4: Air outlet 5: Flap 6: Louver 7: Projection

Claims (4)

a blowout port;
an air direction adjusting plate installed at the air outlet and capable of changing the flow direction of the blown air;
with
A protrusion having an elongated streamline shape is formed along the air flow direction on the surface of the wind direction adjusting plate,
In the air flow direction, the protrusion gradually increases in width and height from the tip to the middle, reaches its maximum width and height in the middle, and gradually increases in width and height from the middle to the rear end. An air conditioner that is designed to be small. a blowout port;
an air direction adjusting plate installed at the air outlet and capable of changing the flow direction of the blown air;
with
A protrusion is formed on the surface of the wind direction adjusting plate to constantly generate turbulence on the downstream side and suppress boundary layer separation,
In the air flow direction, the protrusion gradually increases in width and height from the tip to the middle, reaches its maximum width and height in the middle, and gradually increases in width and height from the middle to the rear end. An air conditioner, which is formed to be small , and in which only one is arranged within the width of the air flow direction adjusting plate in the air flow direction . 3. The air conditioner according to claim 1, wherein a plurality of said protrusions are arranged in a direction perpendicular to said air flow direction. The air conditioner according to any one of claims 1 to 3, wherein the protrusion is formed only on one side of the wind direction adjusting plate.

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