How to choose the roof ventilator of the factory? 5

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The factory ventilator can also be called the ventilation skylight and the ventilation building, which can be divided from the following aspects.

First, the installation locationThe ventilator installed at the ridge of the building, we call it the ridge ventilator, this kind of ventilator is generally a large throat ventilator, the throat is larger, the length of a single strip is longer, the ventilation volume is large, the ventilation effect is good, and the ventilation area is wide; Installed perpendicular to the ridge, we call it a slope ventilator, the slope ventilator can be installed in parallel, the throat is generally smaller, the length of a single strip is shorter, the ventilation is more balanced, and the building ventilation is fully taken care of, and the ventilation has no dead ends.

Second, the appearanceFrom the perspective of appearance, plant ventilators can be divided into streamlined ventilators and thin ventilators. The appearance of the streamlined ventilator is arc shape, the box body is large, the ventilation volume is objective, and the ventilation efficiency is high; The appearance of the thin ventilator is rectangular shape, low height, and good windproof performance.

3. Whether to install the valve plateVentilators can be divided into open ventilators without valve plates and open-closed ventilators with valve plates. The advantage of the open ventilator is that it can deliver fresh air to the room 24 hours a day for natural ventilation; The outstanding feature of the open-close ventilator is that it can freely control the ventilation time and volume, and it can also insulate the building in the area with low temperatures.

1. The nature of the production activities of the plant

When choosing a ventilator for the plant, first of all, the leakage town should consider the nature of the plant's production activities, similar to metallurgy, shipbuilding, steel, machinery, etc., the demand for high-temperature and high-heat plant ventilation is large, and the large throat ventilation building can be cooled in a short period of time, and the large throat ventilation building refers to the equipment hole width is greater than 1000mm, the ventilation channel is wide, and the gas discharge per unit time is large, which can be a good replacement of indoor and outdoor air. If it is a factory with low ventilation requirements and lighting needs, such as logistics and warehousing, you can consider an economical open small throat building.

2. Local climatic conditions

With the development of industry, the new plant has been vigorously built in various places, due to the large difference in climatic conditions in various regions, there are different performance requirements for the plant ventilator, the coastal area is windy and has certain requirements for the anti-corrosion ability of the gas building, combined with the nature of the production activities of the plant, you can choose a thin gas building with low height and good wind resistance; For the snowy areas in the north, the factory building is mostly used to open and close, and the plant can be insulated in winter.

Third, the economic cost of the enterprise

The factory ventilator is a non-standard customized product, and the customer can specify the product model, specification size and material brand according to the company's own cost budget, and then the manufacturer will produce it according to the requirements. In the case of other things being equal, there are certain differences in the unit price of different types of gas building products, the arc gas building is larger in volume and uses more materials, and the cost is higher than that of thin gas building, and the cost of opening and closing gas building with valve plate is higher than that of open gas building.

In addition to considering the above factors, when choosing a plant ventilator, it is also necessary to consider the height of the plant, the temperature difference between indoor and outdoor, the local prevailing wind direction and other conditions.

In accordance with the ventilation and lighting requirements of the building, the specifications and models of the factory building should be determined according to the local climatic conditions, the prevailing wind direction, the height of the canopy, the temperature difference between the inlet and exhaust air, and the ventilation volume.

The wind pressure strength value of the plant ventilator, snow load, the specific value is provided by the manufacturer, if it cannot meet the requirements, it is necessary to negotiate with the manufacturer, and design and produce it separately.

The plant ventilator is suitable for non-** areas of Wuzhou and the ** area of seismic fortification intensity of 7 degrees, if it cannot meet the requirements, it is necessary to negotiate with the manufacturer and design and manufacture it separately. Even in steel structure buildings, reinforced concrete frame buildings, and rack structure buildings, ventilators can often be seen.

Design contact if needed.

Roof ventilator is a ventilation and smoke exhaust equipment used on the roof of modern industrial buildings, which has brought a lot of good news to the production of factories. However, before the ventilator is installed on the roof, the manufacturer needs to measure whether the ventilator meets the relevant specified standards in terms of technical process.

The structural layout of the roof ventilator is reasonable.

Roof ventilator ensures smooth air flow, no ventilation dead angle area, and low flow resistance; The wind baffle has a reasonable layout, has a good wind shelter effect, and can effectively prevent outdoor air backfilling; And it can rely on its own structure to waterproof to ensure that the roof natural ventilator does not penetrate rain and snow into the room under any weather conditions, so as not to affect the normal use of the plant.

The roof natural ventilator body is required to be firm, safe and reliable.

The roof natural ventilator can withstand the load of local wind load and snow load, and does not affect the normal operation of the roof ventilator, and the ventilator should meet the relevant local seismic regulations. The verification of wind load value and snow load value shall be carried out in accordance with the relevant provisions of GB50009 "Code for Load of Building Structure".

Roof ventilators should be insulated.

The roof ventilator should ensure that the inner wall does not condense in the cold weather in winter, so as not to cause dripping water and affect the operation of the production equipment in the plant, and the insulation material should be non-combustible material.

The electric valve plate of the roof natural ventilator is structurally reasonable.

The electric valve plate should have good stiffness, air flow performance and tightness, small air leakage, and when the valve plate is fully closed in winter, it can withstand the influence of hot pressure and the air leakage volume should be controlled within a certain range to ensure the warmth effect of the plant in winter and save energy.

The roof ventilator is uprightAs the standard configuration of the steel structure workshop, its design, manufacture and installation are the problems that the owners need to consider when purchasing, and should ensure that the equipment can be operated safely, reliably and continuously under the allowable use conditions.

The roof ventilator mainly revolves around the aerodynamic wind carrier theory that "when the wind acts on the object, the windward inner surface is the pressure, and the leeward side and the side that allows the wind direction to be the suction", and at the same time, combined with the building structural mechanics, after countless tests and improvements, the current relatively complete product has been formed. Its performance is mainly reflected in:

1) The overall design is streamlined arc type, which not only ensures the strength of the ventilator body, but also effectively reduces the wind pressure borne by the ventilator body;

2) The large volume formed by the height and arc of the ventilator body effectively improves the indoor air collection and discharge capacity;

3) Set up a booster air groove (which is also a drainage outlet) to gather the wind power on the roof, form a bottom-up wind pressure thrust on the ventilator, and drive the air of the heat gathering chamber to be discharged upward;

4) The wind in any direction crossing the top of the ventilator will inevitably form a suction force on the air outlet to increase the upward pulling speed of the ventilator.

The main purpose of the roof ventilator is the ventilation, smoke exhaust, heat dissipation, heat preservation after the installation of rafts, and the lighting effect after the installation of lighting panels.

1. The roof ventilator must know this du

The origin of the technology is the development of the early DAO skylight, the early inner skylight is a two-capacity side exhaust, after the window is opened, the wind backflow blocks the indoor air discharge, and the problem of rain and snow backflow with the wind often occurs.

2. The roof ventilator is a wind-sheltered ventilation skylight developed by the skylight for windproof, rain and snow, which is called the combined ventilation skylight at the earliest.

3. From the above description, it can be known that the main purpose of the roof ventilator is to ventilate, which is better than the early skylight to ensure the effective ventilation function and prevent rain and snow from backing up during ventilation.

4. With the development of lighting board technology, the roof ventilator has increased the lighting function, and the lighting function is the environmental technology that the roof includes ignoring.

5. The principle of roof ventilator ventilation function is the natural ventilation effect produced by hot pressure and wind pressure, and what other auxiliary ventilation is an uncertain factor.

The national standard atlas 11CJ33 "Ventilation and Lighting Skylight" edited by Sichuan McWeigh, a roof ventilator manufacturer, contains 7 types and 12 ventilation skylights.

Among them, the ventilation and rainproof technical advantages of MCW1 ventilation skylight (parallel air duct type) are recognized in the industry.

The roof ventilator can be designed for fire smoke exhaust and controlled by linkage! Add wall exhaust fans on both sides of the roof ventilator.

The size of the plant may be taken into account.

The size of the ventilation volume.

Whether it needs to involve indoor insulation, strong winds, and typhoons.

There is also the amount of daylight.

If you encounter a fire fire, you should also consider the effectiveness of smoke exhaust pants.

There are many parameters, which can be referred to as the 11CJ33 "Ventilation and Lighting Skylight" national building standard reference atlas edited by Sichuan McWeigh.