2results about How to "Guaranteed sound absorption performance" patented technology

The utility model discloses a household music practice room which comprises a music practice room structure, an auxiliary sound insulation structure is detachably installed on the music practice room structure, a musical instrument assembly is placed in the music practice room structure, the music practice room structure comprises a household music room, and a sound insulation assembly is fixed on the household music room. The sound insulation assembly comprises a sound insulation felt layer, a sound absorption cotton layer is detachably installed in the sound insulation felt layer, a sound insulation plate layer is detachably installed in the sound absorption cotton layer, a sound absorption plate layer is detachably installed in the sound insulation plate layer, a sound absorption carpet is placed on the lower side of the interior of the sound absorption plate layer, and an illuminating lamp and a mute ventilating fan are detachably installed on a sound absorption ceiling plate. According to the household music practice room, the sound absorption effect is guaranteed through the arrangement of the sound insulation felt layer, the sound absorption cotton layer, the sound insulation plate layer, the sound absorption plate layer and the sound absorption carpet, internal stuffiness is avoided through the arrangement of the mute ventilator, and the ventilation effect is achieved.

The utility model relates to a kind of sound-absorbing cotton mounting device of air conditioning unit and railway vehicle air conditioning unit, sound-absorbing cotton is pasted on the shell of air conditioning unit, the sound-absorbing cotton is also fixed on shell by several heat preservation nails, the heat preservation nail is composed of panel and nail rod, pressure plate is installed on the panel, the pressure plate is fixedly connected with shell by the nail rod and utilizes pressure plate to press the panel tightly fixed on shell, the nail tip part of the heat preservation nail passes through sound-absorbing cotton and is fixed by nail cap.The utility model sound-absorbing cotton is fixed by back glue and heat preservation nail with shell, provides the function of secondary protection to sound-absorbing cotton, can ensure the stability and reliability of sound-absorbing cotton installation, guarantee the noise reduction effect of air conditioning unit, simultaneously, since heat preservation nail and shell do not need to be fixed by fastener or by the mode of welding additionally, the fixed installation and replacement of heat preservation nail can be facilitated, improve installation and replacement efficiency.