Fixed air flow valve in the ventilation and air conditioning is how to use it? - Air conditioning, r

Fixed air flow valve in the ventilation and air conditioning is how to use it

? - Air conditioning, r

Constant air volume Valve , Is a mechanical self-device applications that require constant air volume ventilation and air conditioning system. Constant air volume air flow control valve does not require external power, it relies on Air hose Within the air force to locate the control Valve Position, the pressure difference in the whole range will be maintained at pre-set air flow on.

In the fresh air system Present in the country, Fan Coil Unit Fresh Air Systems for air conditioning is more common, especially in some hotel rooms, most office buildings are in this way. Common practice is located on each floor of new Fans Group, the laying of a new dry pipe corridor, dozens of branch root were on the access to the room from the Explorer. To hotel rooms, for example, is generally fresh air in every room 100m3 / h, how to do each tube of the air flow are consistent? In general, designers tend to wind in the new addition of a branch pipe Air volume control valve , Expected to be completed by means of post-commissioning wind distribution. Since the new air system generally are dry tube length, branch short, while the wind Control Valve Regulation is neither intuitive, regulation accuracy is not satisfactory Moreover, fresh air in every room only 100m3 / h, the wind is very small, so that debugging is almost impossible to accomplish. Construction unit can do about the new dry pipe measured total air flow, to ensure the air supply branch feel that the point of the wind. In order to guarantee the room by sending the value of fresh air to meet the design, construction units need not go to a room in a room of balance, we just wind each branch on the new addition of a constant air volume valves, these problems were quickly resolved. To live in high-rise buildings, office often holds worry less fresh air, and designers often feel aggrieved. Because drawings perspective, fresh air does not lower the standard of value, but we often ignore the question of how the design point of view to ensure that the actual results, and constant air volume air valves in the new system is an effective measure. Constant air volume valves for now mainly imported, more expensive, I recommend four or five-star hotel, more appropriate use of high office.

In the exhaust system A good air conditioning system design, and its exhaust system to be very reasonable, and this is often not given due attention. In civil, particularly in high-rise building, the building envelope air tightness good, just less air flow can maintain the room pressure value. About 85 ~ 90% of fresh air to be exhausted to the outside through the exhaust organized, so as to ensure the air supply and exhaust air flow balance, otherwise no amount of fresh air can not be sent to the room. In the civil construction, the exhaust air normally through the bathroom, water discharge between the auxiliary rooms such as outdoor. In addition, sometimes a ventilation system should also be further increased in order to guarantee delivery, exhaust balance. The bathroom exhaust, bathroom usual practice is to set each one, two bathroom ventilators, exhaust and ventilation shafts on the interlock. We know that high-rise building air system should be run throughout the year, the appropriate ventilation system should also be run throughout the year. In other words, those who can not use the bathroom toilet ventilator to control the opening, set toilet ventilator, there is no need. Moreover, a large fan with dozens of small fans that run the exhaust system not only difficult to match, not economic. Exhaust capacity of 400m3 / h of the toilet ventilation device noise there is about 40dB, so that loss of quiet bathroom. The bathroom has a large number of ventilators to maintain a great deal of trouble. To address this problem, we may cancel the bathroom ventilators, ventilation shaft on each floor in the branch of an additional one constant air volume valve, located at the top of a ventilation shaft machine. This exhaust system to ensure the levels are roughly the same amount of ventilation, and system control is simple, reliable, bathroom can be very quiet.

In the VAV system In VAV air conditioning system, generally outside the district by way of variable air volume, constant air volume within the area by way of an air volume, changing air pressure system, the inner zone constant air volume air flow design is inseparable from the set valve.

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