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  • 456棋牌 Construction drawings in plan view with a scale to measure out only a few meters duct, how to calculate the number of square meters of duct?

    456棋牌 Full system fixed calculation rule states:

    Duct fabrication and installation of construction shown in different sizes according to expand the area of computing, without deduction inspection hole, measuring hole outlet, suction outlet and other occupied area.

    456棋牌 Tube F = π × D × L

    Where F-- round duct expansion area (in m2 units);

            D-- round duct diameter;

    456棋牌         L-- pipe centerline length.

    Illustrated rectangular duct perimeter multiplied by the length of the pipe centerline calculation.

    Duct area, calculation rules and the whole system of local Quota Quota is the same.


  • Air conditioning equipment noise impact on the environment and the use of the room has been valued by everyone, installation and piping vibration damping from three aspects described position and selection device settings, duct system design optimization, device set forth in the actual engineering design , and how the equipment silencer, isolation, damping, making the surrounding buildings and the use of the room noise reaches specification requirements.

    456棋牌 First, the overall effect of air conditioning and ventilation systems, in addition to room temperature, and humidity to meet the design requirements, the use of the room's noise level is equally important, is the key to design success.

    Second, the air conditioning and ventilation systems noise sources:

    456棋牌 1 normal ventilation: exhaust fan, blower.

    2 air-conditioning system: refrigeration units, circulating pumps, cooling towers, air-conditioned terminal (fan coil units, air handling units).

    3 Fire: exhaust fan, positive pressure blower.

    4 air defense ventilation system: air defense fan.

    Noise control equipment required mainly for air conditioning systems, ventilation equipment in peacetime; and when ventilation air defense equipment and exhaust pressure fan because of its open fire only in time of war or fire, the noise can not be controlled.

    Third, make use of the room up to the national indoor allowable noise standards, to control the following aspects:

    456棋牌 1 device settings to optimize the location and selection.

    456棋牌 2 duct system design optimization.

    3 equipment installation and piping damping vibration isolation.

    Fourth, following from the above three aspects:

    456棋牌 1 equipment room setup and selection:

    (1)

    Chillers, chilled water pumps, cooling water pump room layout and Selection: noisy chillers, chilled water pumps, cooling water pumps should be set up in the basement, the room's walls, underground floor of the acoustic isolation, thereby reducing on the impact of the use of the room floor; if you can only be set on the ground, should set up the equipment room, soundproof doors, set up if necessary double walls, double doors; for the pump should try to choose ≤1450rpm speed low speed pump, the chiller should Select the vibration of the compressor is relatively small (e.g. a screw compression, scroll compression).

    (2)

  • The basic steps to start unloading is: familiar with the drawings, shape analysis, seeking real real long-shaped cable or plane determined expansion method to expand and draw maps.

    A familiar drawing

    Before the commencement of cutting, first to seriously familiar with the construction drawings, understand the need to expand the contents of the tube pieces or parts, which parts of the project in the ventilation system, with which the tube is connected to it on the drawing size, with which material system

    456棋牌 For more. For complex fittings and components to be repeated on the construction plans carefully read and analyzed, must all understand, if there is an error or read drawings or poorly designed, presented to the authorities.

    Second, the physical analysis

    456棋牌 Ventilation and air-conditioning in the shape of the material under process ventilation engineering fittings and components, although complex and diverse, but by some simple geometry of the composition. They are generally mostly housing types, types, expand the method is different. Therefore, the analysis of the complex geometry is molded into simpler geometry process by decomposition, we will be able to find the right expansion method.

    There are curved shell casing and two flat housing.

    (A) flat housing

    456棋牌 Surface of the case by a group called the flat planar graph consisting of housing, it is divided into prismatic and pyramidal. Ridgeline parallel to each other prismatic housing, pyramid-shaped housing of the ridge intersect at one point. Depending on how much the ridge, which is divided into Tuen prismatic, cylindrical and rectangular flower pyramid shape, quadrangular conical shell.

    456棋牌 I1 bottom of a regular polygon, ridgeline plane perpendicular to the bottom port of prismatic housing, called the positive prism housing.

    Bottom port is a regular polygon and vertex projection cone bottom polygon of "coincidence pyramid-shaped housing" is called positive pyramid-shaped body; pyramid-shaped housing projection cone vertex and polygon center does not coincide with the end of the mouth, called oblique conical shell. By clipped shaped by the prism, pyramid-shaped body to produce a variety of housing. One or more planar or curved clipped each part of the divided body called the frustum.

    (B) Surface housing

    456棋牌 Curved surface, or surface, flat surface of the housing is called housing both. Surfaces of the housing can be divided into rotating and non-rotating housing shell off. Rotating the housing can be divided into cylindrical, spherical, conical housing being. Non-rotating housing may be divided into oblique conical, elliptical, irregular surface of the housing.

  • 456棋牌 When staff in the installation of industrial exhaust fans must be good seal the deal, especially surrounding the fan can not have a gap. And the best way to install industrial exhaust fan is the fan this side of the wall and nearby windows all closed, fans across the walls of windows and doors open, Make sure the air flow linear flow exhaust fan for the installation is not a small thing, installation effects can be related to the future operation. This must always pay attention to the entire installation process, the following article will briefly explain, I am willing to help everyone.

    First, when you install exhaust fans, we need to check whether the fan blades in the transport process damaged or blinds without deformation, and then check whether the parts have loosened the bolts to install the selected air environment, should pay attention to the opposite outlet 2.5 - You can not have too much of an obstacle within 3M.

    Also note that, in the selection of industrial exhaust fan installation location Select to note that, be sure to choose a good place to air, so as not to affect the future results.



  • Equipment maintenance

    456棋牌 When wet curtain fan already used after one year, then we should need to pump, adjusting valves for maintenance, evaporation medium for a thorough cleaning, to ensure that wet curtain fan life. The following are concerned that Weiping wet curtain fan of some maintenance methods, is willing to help everyone.

    When we can not be too high in the cleaning water pressure, so washed out wet curtain, if compressed air, to keep a certain distance to clean, to prevent damage to the system. If the system is found to be wet curtain fan trip, please troubleshooting and then press air or GFCI. Water tower inside, the suction fan sucked air from the outside, it will be sucked into the dust from the air, etc., from the wet curtain of dust through the water back to the water tower, so the water tower water must be frequently changed and cleaning. Wet curtain should not be placed around the radioactive substances, corrosive substances and foul smell, the smell of the goods, in order to ensure clean and fresh cold air sent.



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