JPH04363521A - Air-conditioner - Google Patents

Abstract

PURPOSE:To offer a construction around an external shell of an indoor unit of an one-side recessed-in-ceiling cassette type air-conditioner for easily reducing noise at a low cost. CONSTITUTION:An external shell 1 has a semicircular cross-section to perform flow-straightening inside an indoor unit. Therefore, both side plates 11, a fan mounting plate 3, and a water receiving pan support plate 6 are firmly attached. As a result, a unit having a semicircular cross-section can be built with a simple construction without supplement parts, so that noise reduction can be achieved at an extreme low cost.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of the outer panel of a split-type air conditioner that achieves low noise when the indoor unit is a one-way ceiling-embedded cassette type unit.

0002

[Prior Art] Conventionally, in a one-way ceiling-mounted cassette type air conditioner, in order to reduce noise by rectifying the air flow inside the unit, there has been a technique of installing a rectifying plate inside the unit, Some units had triangular prism members made of Styrofoam or other materials placed inside the corners of the unit to smooth out the internal shape and rectify the flow.

[0003] As a known example of this type, there is
Some examples include those described in Publication No. 236.

0004

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, new additional parts such as a rectifying plate and internal members are required to rectify the air flow, which increases the cost.
There were problems in that the weight of the unit increased or the reliability of additional parts had to be taken into account.

An object of the present invention is to reduce the noise of the unit by rectifying the air flow inside the unit with a simple structure without using any such additional parts.

[0006]

[Means for Solving the Problems] In a cassette type indoor unit that is installed in the ceiling with one-way airflow, the side panels of the unit are constructed in a semi-elliptical shape with flanges, and the portions corresponding to the front cover, top cover, and rear cover of the unit are , is formed by bending a single plate into a semi-cylindrical shape.

[0007] To give more details, the unit is divided into two parts at the front and rear.
The separate fan plate has a highly rigid structure to maintain unit strength, and is firmly fixed to the semi-elliptical side plates mentioned above. In addition, this fan plate has a structure that can hold and fix both the fan and the heat exchanger.

[0008] By the above means, the unit of the present invention has a semi-elliptical cross-sectional shape in the longitudinal direction, thereby achieving the above object.

[0009]

[Function] Since the cross-sectional shape of the unit is semi-elliptical, the air flow inside the unit is smoother than that of the unit that has a triangular prism member inside the corner as described in the conventional technology section, so the noise of the unit is reduced. A significant reduction will be achieved.

[0010] Furthermore, by making the fan plate and both side plates have a strong structure, the sheet metal parts corresponding to the front cover, top cover, and rear cover can be constructed from a simple single plate. The above goals can be achieved easily and at low cost.

[0011]

[Embodiments] Hereinafter, embodiments of the present invention will be explained using FIGS. 1 to 4. 1 to 3 are cross-sectional views of a one-way ceiling-buried cassette type unit, and an embodiment of the present invention is shown in FIG.

Reference numeral 1 indicates an outer panel, 2 a fan casing, 3 a fan mounting plate, 4 a heat exchanger, 5 a water receiver, 6 a water receiver support plate, 7 a heat insulating material, and 8 a panel. In the present invention, since the outer plate 1 is shaped to have a semi-elliptical cross section, the flow of air exiting the heat exchanger 4 is smooth, and the air flow at the corners is different from that of a conventional box-shaped unit. Noise can be reduced by not causing any disturbance.

Furthermore, FIGS. 2 and 3 are examples of prior art,
The outer panel of No. 1 has a rectangular cross section. Figure 2
In order to adjust the air flow, a triangular prism-shaped insulation material (No. 9) is installed in the corner of the room on the heat exchanger side. In FIG. 3, ten auxiliary plates are used to adjust the air flow. In this way, in the conventional technology, additional parts such as the cross-sectional material 9 and the auxiliary plate 10 are required, and there are problems in that the cost is high, the product weight increases, and the reliability of the additional parts must be taken into consideration. was there.

In comparison, the present invention shown in FIG. 1 does not require such additional parts, and can arrange the air flow within the unit with a simple structure and reduce noise.

FIG. 4 is a bird's-eye view of the invention shown in FIG. 1, and is used to explain the unit configuration for achieving the object of the invention.

First, the outer plate 1 is a flat plate or a plate with both ends bent, with holes for screws made therein, and then rolled to fit the unit. Alternatively, if this outer panel is made of a thin plate, it is unnecessary to roll it.
It is also possible to bend it by tightening screws during assembly. For this reason, the outer plate 1 requires less processing than when configuring a normal box-type unit, and costs can be reduced.

Reference numeral 11 denotes both side plates of the unit, which have a semi-elliptical shape. This side plate has a flange portion that is folded back inward, and is configured to be able to fix a simple flat outer plate with screws. The fan mounting plate 3 and the water receiving support plate 6 have a highly rigid structure, so that the both side plates 11 can be firmly fixed. As a result, the structure is such that the unit strength can be ensured even when the outer panel 1 is made of a thin plate with low strength.

With the unit structure described above with reference to FIG. 4, a unit having a semi-elliptical cross section can be easily realized at low cost while ensuring unit strength, and noise can be reduced.

[0019]

[Effects of the Invention] According to the present invention, it is possible to realize a unidirectional ceiling-embedded cassette type indoor unit with a semi-elliptical cross section with a simple unit structure without requiring any additional parts.
(a) Reliability is improved because the number of parts is reduced.

(b) Unit price can be reduced.

(c) Weight reduction can be achieved.

[0022] ■ Since air passage resistance can be reduced, noise can be reduced.

There are advantages such as [0023].

[Brief explanation of drawings]

FIG. 1 is a sectional view of a unidirectional ceiling-mounted cassette type air conditioner indoor unit of the present invention.

FIG. 2 is a sectional view of a conventional unidirectional ceiling-mounted cassette type air conditioner indoor unit.

FIG. 3 is a sectional view of a conventional unit.

FIG. 4 is a bird's eye view showing the unit component configuration of the present invention in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1...Unit outer plate, 2...Fan casing, 3...Fan mounting plate, 4...Heat exchanger, 5...Water receiver, 6...Water receiver support plate, 7...Insulating material, 8...Panel, 9...Triangular prism-shaped member, 10
...Auxiliary board, 11...Side plate, 12...Electric box.

Claims (1)

[Claims] Claim 1: In a unidirectional ceiling-mounted cassette-type indoor unit for a split-type air conditioner comprising a heat exchanger, a fan assembly, and a water receiver, both side panels of the indoor unit are configured in a semi-elliptical shape, and a front cover is provided. , a rear cover, and an upper cover are formed by bending a single plate into a semi-cylindrical shape, and the cross-sectional shape of the unit is semi-elliptical.