JPH0749289Y2 - Air conditioner - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner embedded in or suspended from a ceiling.

[0002]

2. Description of the Related Art An example of a conventional ceiling-embedded air conditioner is shown in FIG. Case body 2 buried in the ceiling 1
Inside, a heat exchanger 7, a drain pan 10, a motor 5, a turbo fan 6, a bell mouth 12, and the like are built in. A ceiling panel 8 is attached to a lower portion of the case body 2, a suction port 3 is formed in a central portion thereof, and an air outlet 4 is formed adjacent to the suction port 3.

During operation of this air conditioner, refrigerant from an outdoor unit (not shown) circulates in the heat exchanger 7, and the motor 5 drives the turbofan 6. Then, the indoor air in the chamber 9 passes through the suction port 3, the suction grill 11 and the filter 13, is guided by the bell mouth 12, is sucked into the turbo fan 6, and is urged. Then, in the process of flowing through the heat exchanger 7, the air is cooled or heated to become conditioned air, which is blown into the chamber 9 from the blowout port 4.

[0004]

Since the space for accommodating the bell mouth 12 is reduced as the case body 2 becomes thinner, it is necessary to sufficiently rectify the flow of the air sucked by the bell mouth 12 into the turbofan 6. However, as a result, the performance of the turbofan 6 is deteriorated.

[0005]

The present invention has been proposed to solve the above problems, and its gist is to provide an air conditioner having a turbofan having a bell mouth on the suction side. , Forming an air suction passage for sucking air from the outer periphery between the bell mouth and the panel installed on the front surface thereof, and sucking air flow in the air suction passage in a direction opposite to the rotation direction of the turbofan. It is an air conditioner characterized by the installation of guide vanes for guiding.

[0006]

In the present invention, because of the above configuration, air is sucked into the air suction passage from the outer periphery thereof, and in the process of flowing in this passage, the guide vanes cause the air to flow in the direction opposite to the rotation direction of the turbofan. It is made to turn and is sucked by the turbo fan in this state.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention is shown in FIGS. Air outlets 21 are arranged at the central portions along the four edges of the rectangular ceiling panel 20, and suction ports 22 are formed at the four corners. Panel 23 is installed on the front of the bell mouth 12 at a slight interval,
An air suction passage 24 for sucking air from the outer periphery is formed between the bell mouth 12 and the panel 23. A plurality of (4 in the figure) guide vanes are provided on the upper surface of the panel 23.
25 is installed, and the guide vanes 25 guide the suction air flow flowing through the air suction passage 24 and direct it in the direction opposite to the rotation direction (arrow) of the turbofan 6.
Other configurations are similar to those of the conventional one shown in FIG. 4, and corresponding members are designated by the same reference numerals.

[0008] When the turbo fan 6 is driven by the motor 5 during operation of the air conditioner, the room air is sucked into the air suction passage 24 from each suction port 22, and the air suction passage 24 By being guided by the guide vanes 25 in the process of flowing, the turbo fan 6 is pre-turned so as to rotate in a direction opposite to the rotation direction. Then, in this state, the turbo fan 6 is sucked into and energized to flow through the post heat exchanger 7 to become conditioned air, which is blown into the chamber 9 from each of the outlets 21. Although the guide vanes 25 are provided on the panel 23 in the above embodiment, the bell mouth 12
Can also be provided.

[0009]

According to the present invention, the air is sucked into the air suction passage from the outer circumference thereof, and in the process of flowing in this passage, the guide vanes pre-turn in the direction opposite to the direction of rotation of the turbofan. Since it is sucked into the turbo fan, the aerodynamic characteristics of the turbo fan are improved and its performance is improved. Further, since the height of the bell mouth can be reduced, it is possible to contribute to making the air conditioner thinner.

[Brief description of drawings]

1 is a longitudinal sectional view taken along the line AA of FIG. 2 showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is a perspective view of a panel in the above embodiment.

FIG. 4 is a vertical cross-sectional view of a conventional air conditioner.

[Explanation of symbols]

 6 Turbofan 12 Bell mouth 23 Panel 24 Air suction passage 25 Guide vane

Claims (1)

[Scope of utility model registration request] 1. An air conditioner having a turbofan provided with a bell mouth on the suction side, wherein an air suction flow path for sucking air from the outer periphery is formed between the bell mouth and a panel installed in front of the bell mouth. An air conditioner characterized in that a guide vane for guiding the suction air flow is installed in the air suction passage in a direction opposite to the rotation direction of the turbofan.