HEATING VENTILATING SYSTEM OF PASSENGER CABIN (DRIVER CAB) Russian patent published in 2013 - IPC B60H1/04 B60R13/08 F24F13/24 

FIELD: transport.

SUBSTANCE: invention relates to machine building. Proposed system comprises heater casing and fan casing connected via air duct with heater casing. Heater chamber is communicated via distribution openings and air ducts with passenger compartment zones and comprises noise killing structural element. Noise-killing element is composed of flat-sheet vibration-and-noise interlayer incorporating one- or two-layer viscoelastic and reinforced layers. Interlayer surface area makes at least 30% of total surface area of structural element wall. Said interlayer with adhesion coating is arranged on structural element wall limited zone. Said wall has perforations with diameter in the range of: d=(1.2…5.0)×h_cm, arranged with center-to-center spacing: b=(3.2…22.0)×d, while perforation factor in the range of: where h_cm is thickness of structural element; S_pen is total area of projection of perforations on aforesaid limited zone; S_int is face surface area of said interlayer.

EFFECT: decreased noise and vibration.

3 cl, 16 dwg, 2 tbl