Ventilation cab can be done outside or craft supply treated air.
If the premises are allocated harmful gases, it is difficult absorbed chemical sinks (carbon monoxide), almost universally applied outside air ventilation. In the presence of gases absorbed by water or aqueous solutions of reagents, the possibility of filing a cabin air craft, but such installation in the practice are not yet used.
If indoor plant stand only heat and moisture, accompanied or not accompanied by dust, then apply mainly recycling plant. For large overhead cranes in the most rational use of special air-conditioner type SK.K-1PR, manufactured by domestic industry specifically for installation on heavy cranes.
When the "dryВ» вЂў heat dissipation and very high temperatures in the upper zone plant may restrict cooling air wash his craft to an adiabatic process without the use of artificial cooling.
Conditioners such as CCM-1PR have the oil filter, heater and a refrigeration unit with a compressor that runs on freon. Performance of the air conditioner 1400 m3 / h, the bulk of air recirculated in the system, the shop adds only a small amount. Air conditioner is designed for installation on the crane with a closed cab. Weight of the air conditioner about 1,2 m, envelope 1670x850 mm, L = 1660 mm. Air conditioner type CCM-1PR works on alternating current.
Ventilation cab outside air in the following obrazom.Vozduh climbs out and treated in a special plenum chamber, which serves only the crane cab. The air is filtered, cooled in a warm period in the wash chamber (often recycle water), and during the cold period is heated to +18 В° C. The treated air in the chamber is brought to a special air ducting, laid along the runway. From the duct through a special mobile unit air is pumped into the crane cab. Vozduhoprnemnik and crane cab tightly linked.
Duct with a receiver designed by one of non-ferrous metallurgy plants in conjunction with Lyautey and is recommended as a model Giprotisom (standard design number of OM-02-108). Duct in its lower part has two rubber bands, sliding motion crane AIR INLET - hook (Fig. 42). Air inlet pipe through which air enters the cabin, all the time inside the duct, moving along with the crane cab. When moving the shuttle gently pushes the sealing tape, again converging after the passage of the shuttle.
Air pipe with sealing tape and the air inlet, the shuttle was tested in practice. With careful implementation, and proper maintenance of construction is quite efficient. The disadvantage of it is a significant loss of air coming into the shop through a non-density rubber bands. Pressure in air lines maintained in the range of 30 to 50 kg/m2, the pressure is required to reduce the size of air inlet pipe.
An air duct, serving some cranes, has considerable length - up to 300 m. Such a long air ducting design is not recommended. The length of the duct shall comply with the maximum displacement serviced cranes. On the possibility of installing should be disaggregated by serving one system no longer than three or four taps.
The air supply duct is carried to its end with one or two or ticking from the end and in the middle with a quantity of nettles for more than two.