JP3085771B2 - Ceiling-mounted 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 ceiling-mounted air conditioner.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view of a conventional ceiling-mounted air conditioner. In the figure, 100 is an indoor unit of the air conditioner, 1 is an outer plate of the unit, 2 is a fan provided in the unit, 3 is a heat exchanger, and 4 is provided below the heat exchanger. Reference numeral 5 denotes an air filter, 6 denotes a partition plate, 11 denotes an air inlet, and 12 denotes an air outlet. Reference numeral 20 denotes a ceiling, and the indoor unit 100 of the air conditioner including the above components is installed so that its main part is located above the ceiling surface, that is, in the space above the ceiling. 13 is an indoor space below the ceiling surface. The air inlet and air outlet are open to the ceiling.

[0003] When the apparatus is operated, room air enters through the air inlet 11 and is air-conditioned.
From the interior space 13.

[0004]

In the air conditioner indoor unit 100, noise is generated from a fan or the like inside the air conditioner indoor unit 100. In the conventional air conditioner, these noises are transmitted from the air inlet 11 and the air outlet 12 to the indoor space 13. Was being radiated to

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a ceiling-mounted air conditioner in which noise radiated into a room is reduced.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a ceiling-mounted air conditioner having the following features. (1) Main parts such as fans and heat exchangers are located in the space above the ceiling
The air inlet and air outlet are located on the ceiling surface
In the ceiling-mounted air conditioner that opens into the indoor space with
Exposed to the space above the ceiling and sucked from the air suction port
An outer plate located in front of the fan outlet from which air is blown
An opening is provided in a part of the opening, and the opening has a large flow resistance.
Sound materials and / or seats are provided . (2) In addition to having the features of the above (1), an acoustic opening for transmitting only sound is provided in a partition plate for separating the suction side space and the discharge side space in the main body.

[0007]

According to the above-mentioned constitution (1), a noise-absorbing material and / or a sheet having a large flow resistance provided on a part of the outer plate is provided for the noise generated in the air conditioner, especially in the air outlet side space. Is radiated to the space above the ceiling through the opening. In particular,
The noise coming out of the fan outlet from which air is blown out
Sound absorption with large flow resistance provided in front of fan outlet
Through the opening where the materials and / or sheets are located
Can be radiated between . Furthermore, in the configuration adopting the configuration (2), in addition to the operation of the configuration (1), noise generated in the suction side space in the air conditioner is transmitted through the acoustic opening of the partition plate to the discharge side space. After being radiated inside, it is radiated to the space above the ceiling through the opening provided in a part of the outer panel. By these effects, radiation of noise to the indoor space is reduced.

[0008]

FIG. 1 is a sectional view of a first embodiment of the present invention.
In the figure, reference numeral 7A denotes a so-called acoustic opening provided on a part of the upper outer panel of the indoor unit 100, which is an "opening that allows only sound to pass through". This is constituted by a perforated plate-shaped opening portion 8A in which a part of the outer plate 1 is formed in a perforated plate shape, and a portion 9A made of a thin sheet or a sound absorbing material having a large flow resistance attached to the inside thereof. . The other parts are the same as those of the prior art, and the description is omitted.

In the present apparatus, the noise generated in the indoor unit 100, particularly in the outlet side space Y, is radiated to the space above the ceiling through the opening 7A that transmits only the above-mentioned sound, so Noise propagation is reduced.

FIG. 2 is a sectional view of a second embodiment of the present invention. In the figure, reference numeral 7B denotes a so-called acoustic opening provided in the partition plate 6, which is an “opening that transmits only sound”. As in the case of the first embodiment, this opening is a perforated plate-shaped opening 8B,
It is constituted by a portion 9B made of a thin sheet or a sound absorbing material having a large flow resistance attached to the inside. The other parts are the same as those of the first embodiment, and the description is omitted.

The present apparatus is applied to an air conditioner in which the sound pressure in the suction side space X is high. In addition to the same effects as shown in the first embodiment, the noise generated in the suction side space X is also reduced. Through the opening 7B that transmits only the sound of
After being radiated to the room, it can be further radiated to the space above the ceiling via the opening 7A that transmits only sound, so that the propagation of noise to the indoor space is further reduced.

[0012]

According to the ceiling-embedded air conditioner of the present invention, the air exposed to the space above the ceiling and sucked from the air suction port is provided.
An opening is provided in a part of an outer plate located in front of a fan outlet from which air is blown, and a sound absorbing material and / or a sheet having a large flow resistance is provided in the opening, or furthermore, in the main body. An acoustic opening that allows only sound to pass through is provided in the partition that separates the suction side space and the outlet side space, so that the noise generated by the ceiling-mounted air conditioner escapes to the space above the ceiling, and the indoor space Radiation of noise to the vehicle can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a sectional view of a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a conventional ceiling-mounted air conditioner.

[Explanation of symbols]

 Reference Signs List 1 outer plate 2 fan 3 heat exchanger 4 drain pan 5 air filter 6 partition plate 7A, 7B opening that transmits only sound (acoustic opening) 8A, 8B perforated plate opening 9A, 9B thin sheet or sound absorbing material 11 Air inlet 12 Air outlet 13 Indoor space 20 Ceiling X Suction side space Y Blowout side space

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 1/00 401

Claims (2)

(57) [Claims] (1) The main parts such as fans and heat exchangers are behind the ceiling
Located between the air inlet and the air outlet
Is a ceiling-mounted air conditioner that opens into the indoor space on the ceiling surface
Exposed in the space above the ceiling and sucked through the air suction port.
Located in front of the fan outlet from which the air is blown
An opening is provided in a part of the outer plate, and a flow resistance of the opening is formed in the opening.
A large sound absorbing material and / or sheet is provided.
Ceiling-mounted air conditioner . 2. The ceiling-embedded air conditioner according to claim 1, wherein an acoustic opening for transmitting only sound is provided in a partition plate for separating a suction side space and a discharge side space in the main body.