JPH04110312U - air conditioner - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the noise generated from the turbo fan 6 by directing the air sucked into the turbo fan 6 in the rotational direction of the turbo fan 6. [Structure] By installing a panel 23 on the front of the bell mouth 12, an air suction channel 24 is formed that sucks air from the outer periphery, and by installing a guide vane 25 in this channel 24, the air is sucked into the turbo fan 6. Air is directed in the direction of rotation of the turbo fan 6.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a ceiling-embedded air conditioner.

0002

[Conventional technology]

An example of a conventional ceiling-embedded air conditioner is shown in FIG. Inside the case body 2 buried in the ceiling 1 are a heat exchanger 7, a drain pan 10, and a motor. It has built-in 5 motors, 6 turbo fans, 12 bell mouths, etc. This case body 2 A ceiling panel 8 is attached to the lower part of the ceiling panel 8, and a suction port 3 is formed in the center of the ceiling panel 8. An air outlet 4 is formed adjacent to the inlet 3.

0003 When this air conditioner is operating, refrigerant from an outdoor unit (not shown) flows through the heat exchanger 7. The turbo fan 6 is driven by the motor 5. Then, the room inside room 9 Air passes through the suction grill 11 and filter 13 from the suction port 3, and is guided to the bell mouth 12. is drawn into the turbo fan 6 and energized. Then, the process of flowing through the heat exchanger 7 The air becomes conditioned air by being cooled or heated by be done.

0004

[Problem that the idea aims to solve]

As the case body 2 becomes thinner, the bell mouth 12 becomes smaller. The flow of air sucked into the turbo fan 6 cannot be rectified sufficiently. As a result, the angle of attack of the air at the inlet of the blades of the turbo fan 6 increases, causing the There was a problem in that the noise generated from the bofan 6 became louder.

[0005]

[Means to solve the problem]

This invention was proposed to solve the above problems, and its gist is as follows: However, in air conditioners with a bell mouth on the suction side of the turbo fan, the upper There is an air gap between the bell mouth and the panel installed in front of it that sucks air from the outside. An air suction channel is formed and the air flowing through this air suction channel is It is characterized by the installation of a guide vane that is oriented in the direction of rotation of the turbo fan. It's in the air conditioner.

[0006]

[Effect]

In this invention, since it has the above configuration, the air suction flow path is As the sucked air flows through this flow path, it is transferred to the turbofan by guide vanes. It is directed in the direction of rotation of the engine, and in this state is sucked into the turbo fan.

[0007]

【Example】

An embodiment of the invention is shown in FIGS. 1-3. Air outlets 21 are arranged along the edges of the four sides of the rectangular ceiling panel 20 and in the center thereof. suction ports 22 are formed at each of the four corners. A panel 23 is installed at a slight interval in front of the bell mouth 12, and this bell mouth An air suction channel 24 that sucks air from the outer periphery is formed between the space 12 and the panel 23. Ru. A plurality of guide vanes 25 (four in the figure) are installed on the top surface of this panel 23. This guide vane 25 guides the suction air flow flowing through the air suction channel 24. so that it is oriented in the rotational direction (arrow) of the turbo fan 6. The other configurations are the same as the conventional one shown in Fig. 4, and corresponding members are designated by the same reference numerals. It is attached.

[0008] Therefore, when this air conditioner is operated, the turbo fan 6 is driven by the motor 5. When the indoor air is sucked into the air suction channel 24 from each suction port 22 from its outer periphery. The air is guided by the guide vane 25 in the process of flowing through this air suction channel 24. The direction of rotation of the turbo fan 6 is oriented by this. In this state, after being sucked into the turbo fan 6 and energized, the heat exchanger 7 becomes conditioned air, which is blown out into the chamber 9 from each outlet 21. In addition, in the above embodiment, the guide vane 25 is provided on the panel 23, but the guide vane 25 is provided on the panel 23. It can also be provided in the mouse 12.

[0009]

[Effect of the idea]

In this invention, the air sucked into the air suction channel from its outer periphery is In the process of flowing inside, guide vanes direct the flow in the direction of rotation of the turbo fan. This reduces the angle of attack of the air at the inlet of the turbofan blades. As a result, the noise generated from the turbo fan can be reduced.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view taken along line A-A in FIG. 2, showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB in FIG. 1;

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

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

[Explanation of symbols]

6 Turbo fan 12 Bellmouth 23 panels 24 Air suction channel 25 Guide vane

Claims (1)

[Scope of utility model registration request] Claim 1: An air conditioner in which a bell mouth is provided on the suction side of a turbo fan, in which an air suction channel 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 is installed in an air suction channel to direct the air flowing therein in the rotational direction of the turbo fan.