The deflector for ventilation represents the device, simple on design, which task consists in ensuring protection of flues and channels from precipitation, dirt and wind.
In the absence of the necessary adaptation in ventilation system quite often there are various problems with draft. Outflow of smoke because of obstacles can stop or stops absolutely then labor-consuming actions for correction of situation can be required. Deflectors establish for the purpose of improvement of work of system.
Why installation of the deflector is necessary
The device for bigger overall performance of ventilation helps to reduce influence of various factors on its working capacity. You should not neglect need of its use. Quite often depends on atmospheric conditions how effective will be operation of the ventilation system. Carrying force provides circulation of air flows. Such effect is gained at the expense of difference in indoor temperatures and outside of it. Wind will influence ventilation work, complicating process of natural air exchange or increasing its speed.
Externally the turbodeflektor is similar to cap which is placed above aspiration duct. Due to work of this knot it is possible to reduce negative impact which is rendered on the draft equipment, to provide protection for the mine against garbage. The formed streams of wind are redirected that enhances draft a little. That to increase it, in flue the design executed like umbrella is established. The deflector installed on house pipe from which there is smoke provides clearing of sparks and reduces danger of ignitions.
As the deflector works
Work of design consists in the correct reflection from the diffuser of air streams. There is their section, for this reason air is rarefied, the draft appears.
Diffusers work at installation more effectively on ventkanat, located with bends or is directed on curve. At thrust boost in pipe efficiency of adaptation it is capable to increase by 20%.
Types of devices
The modern devices for ventilation improvement which are available on sale considerably differ in functionality, and such have different construction features. Among them it is possible as separate option to describe the rotational deflector. This version includes simple models which well are suitable for application on flue and ventilation pipes. At many the design can be collected independently.
Plastic and copper, galvanized or stainless steel, aluminum can act as basis of such device. On design the deflectors can be subdivided as follows:
- Tsaga deflectors.
- Open options of dish type.
- Star-shaped types.
- Devices which work is performed by Grigorovich's principle.
- Designs of H-shaped type.
The most popular the device called by name Grigorovich thanks to its extreme simplicity is considered.
On class the deflectors are rotational or static. The last are motionless. Rotational devices are capable to rotate.
The most known types of deflectors
The ventilation pane can represent dish design. Its work differs in efficiency and simplicity. Rotational devices have the device difficult, they have rotating part and the difficult system of blades. The cost of such devices considerable, but also it is possible to gain effect of their work excellent.
H-shaped devices on one head contain two deflectors at once. The turning nozzles are supplied with special keel, work by the principle of weather vane, turning the device in the direction of wind. Thus air flows get to blades and openings of design, provoking effect of ejection of gas from vozdukhovodny channels.
Rotational models
Rotational devices have rotation potential, are used in ventilation and channels to removal of smoke. Addition of the engine is not necessary for them. Elements due to work of wind force will rotate.
At rotation of the turbine in the channel the depression is created. The excess of moisture, dust and heat, adverse for health of gases will be gradually extended. The room at the same time receives protection against education in condensate. Rotation of head of the deflector does not depend on where wind is directed. Depression is capable to enhance draft in smoke and ventilating channels, and the head will not allow reverse thrust. When mounting this device there is no need for providing power supply.
Statodinamichesky deflector and its features
The French developers have prepared the statodinamichesky deflector Astato which helps to provide good stream draft in system where ventilation happens in the natural way. The device can be installed at any height, for the constructions built recently and for very old. After turning on of the electromotor aerodynamics of the channel remains the same. Extent of depression of air is expressed by indicators of pressure and pressure of the fan.
It is possible to apply nippelny connection to mounting of the device is convenient option if the channel of ventilation has circular section. During the work with the whole group consisting of rectangular shape air ducts the adapter is installed. Management of such design can be carried out as manually, and with use of time relay and the device for measurement of pressure.
The deflector is developed in the form of six various options. They differ among themselves with diameter – it can be in the range of 16-50 cm. The cost of devices depends on the size.
Other data on operation of devices
Deflectors of the ventilation system choose on design depending on what field of its application. If it is necessary for system forced-air and exhaust, the picked-up model should be placed on head of the channel. So it is possible to create area of reduced pressure and at the expense of it to increase draft.
The effect of sparseness of air is gained at the changing section. When airspeed increases, differential pressures will be stronger. Force of wind blowing in pipe provides creation of vacuum regarding head at the expense of what masses goes inside up. Formation of additional draft is so provided.
The deflector on exhaust pipe is made of several fragments. It is the diffuser, protective element, the body. The diffuser is the piece of pipe executed in the form of truncated cone. It is put on pipe that part which already. The device helps to increase pressure in pipe, in the field of head. So the difference of pressure increases, ejection of exhaust air masses turns out more active. The part in the form of umbrella is necessary not to allow hit to the canal of small garbage, other unnecessary objects. The body provides section of air streams, providing pressure reduction inside.
Grigorovich's cap
The device which is called Grigorovich's cap unites such knots:
- Cone of the return type.
- Protective cap or umbrella.
The last part is presented also in the form of truncated cone, but pipe it is put on wide part. Its section has to be wider, than at head. The valve as well as in the previous option, provides protection. Under cap the return cone turned by top down is located. It does not assume that air accumulated under umbrella, and provides creation of air flow in interaction with the diffuser. The ventilation pane of this look works in two directions by the principle of ejection.