JPS622409Y2 - - Google Patents

Description

[Detailed description of the invention] This invention provides a sound deadening plate that protrudes into the ventilation passage near the air discharge port of an air conditioner or heater, and uses the sound deadening plate to naturally soften the congestion of air passing through the ventilation passage. The present invention relates to a muffling device for an air-conditioning/heating machine, which is intended to improve air distribution in an extremely good manner and to prevent noise from being generated from the air discharge port.

Conventionally, air conditioners have had air blown from a blower passing directly through an air passage before being discharged from an outlet. This causes a combination of noise generated by the blower and the friction noise of the air flowing through the air passage, and these noises, together with the noise of the air passing through the outlet grill, create a considerable amount of noise.

The main purpose of this invention is to completely prevent such noise generation.
In a fan coil unit in which a coil element 2, a blower 3, etc. are arranged, the tip of a flat plate is bent slightly downward 6 in the vicinity of the air outlet 5 of the machine casing 1 and in the ventilation passage 4. The present invention aims to provide a sound damping device for an air conditioner/heater, characterized in that a sound damping plate 6 having an air retention portion A formed inside the bent portion 6' is provided in a protruding manner.

Below, as an embodiment of the present invention, a floor-standing air conditioner/heater will be explained in detail with reference to drawings. 1 is a machine casing, 2 is a coil element, and 3 is an air blower with a part 4' having a slightly narrowed middle passage at its upper part. A passage 4 is provided and communicates with an air outlet 5 opened at the top of the machine casing 1.

Further, on one wall of the narrow portion 4' of the ventilation passage 4 or on both walls of the groove, there is a sound deadening plate 6 formed by bending the tip of a flat plate or an inclined plate slightly downward 6' as shown in the first figure.
The bent end portion 6' is attached so as to protrude into the ventilation passage 4 to form an air retention portion A.

Note that the shape of the sound deadening plate 6 can be changed to a second shape depending on the capacity.
It is also possible to use a plate with a large number of bent portions 6'' as shown in the figure, or a modified plate with concave and convex portions.

Reference numeral 7 in the drawing indicates a suction port.

As described above, since the sound damping device for the air conditioner according to the present invention has the sound damping plate 6 protruding from the ventilation passage 4, the airflow flowing inside the ventilation passage 4 is directed to the ventilation passage 4 and the narrowed portion 4'. While being actively squeezed, at the same time it is resisted by the sound deadening plate 6, this air becomes jammed in the air stagnation area A below the bending part 6', and then gradually circulates upward. becomes. As will be clear from the following experimental results, this air congestion effect can provide an extremely significant noise reduction effect.

Experimental data Conventional (without sound deadening plate) 41 horn Present invention (with sound deadening plate) 36 horn Furthermore, by adding the sound deadening plate 6, the air distribution near the air outlet 5 becomes extremely good. It is an ideal idea as an energy-saving air conditioner/heater due to its simple structure, which greatly reduces energy consumption.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the air-conditioning/heating machine of the present invention to which a silencer is attached, and FIG. 2 is an enlarged side view of the main parts illustrating another embodiment. Explanation of symbols, 1...Machine casing, 2...Coil element, 3...Blower, 4...Blower passage, 5...Blower outlet, 6
...Sound deadening plate, 7...Suction port, A...Air stagnation part.

Claims (1)

[Scope of Claim for Utility Model Registration] In a fan coil unit etc. in which a coil element 2, a blower 3, etc. are arranged in a machine case 1, the area near the air outlet 5 of the machine case 1, inside the blower passage 4. Bend the tip of the flat plate slightly downward 6'
A sound deadening device for an air conditioner/heater, characterized in that a sound deadening plate 6 having an air retention portion A formed inside the bent portion 6' is provided protrudingly. Sound deadening in an air-conditioning/heating machine, characterized in that the sound deadening board 6 as described in claim 1 of the above-mentioned utility model registration is made of a modified board in which a large number of bent portions 6'' are formed, and an air retention portion A is provided below the board. Device.