Supply ventilation device

FIELD: ventilation.

SUBSTANCE: supply device comprises an insulated vessel, inside which there is a windproof valve, a noise-suppression insert, a filter, a controlled ventilation grid, an external protective grid. The windproof valve in its turn comprises a vessel with a stop plank and several windproof tabs of various mass with stiffening ribs. Windproof tabs are hingedly fixed in vessel walls with the possibility of displacement relative to the axis of fixation, and are arranged with present curvature of surface. Automatic control of air flow is carried out by serial closure of windproof tabs, modification of their shape (curvature) at high pressure drops, and accordingly opening of tabs with reduction of pressure drops. The noise-suppression insert is made from a finely porous material and comprises a row of inclined slots made at the angle to the frontal surface.

EFFECT: control of air flow in a room.

3 cl, 3 dwg

The invention relates to the ventilation of residential and public buildings, and is intended for the regulated flow of air in dwelling and public buildings with natural or mechanical exhaust ventilation.

Famous supply air vent "KIV-125", embedded in the exterior walls of buildings for the controlled flow of air in dwelling and public buildings. The valve consists of a body, intake grilles with mesh, insulation in the form of a cylinder located inside the housing, and an inlet cap with filter and adjustable dampers [lalev AM and others About the sound properties window "FRAM WINDOWS DSK-1 in combination with a vent KIV-125 /the newsletter "Windows and doors". 2000. No. 2 (35). - P.44-46].

However, the known device does not contain elements that provide automatic regulation of the flow rate of supply air depending on the wind or thermal differential pressure. As a result, the flow rate of supply air when wind impacts significantly increases, which leads to increased cost of heat for preheating the supply air and requires constant manual control.

Known technical solutions closest to the technical nature of the claimed object is forced-ventilation device [U.S. Pat. 2194222, THE RUSSIAN FEDERATION, TO THE. F24F 7/10. Supply air handling unit / Addressees, Gaapentin, Have, Aghazadeh]. The device includes an insulated housing, adjustable ventilation grille, protective front grille, porous insulation, disposable in the housing, and windproof valve thrust plate installed in the bottom of the hull. The valve can be made in the form of plates or parts, hinged to the side walls of the housing can move relative to the axis of the fastening.

When wind impacts windproof valve is moved relative to the pivot bearing in the direction of the air flow, reducing the area for the passage of air and therefore reducing the inlet air supply.

A disadvantage of the known device is full closure ("zachlapywaniu") windproof valve when the fluctuations of wind impacts or large pressure drops and consequently uneven supply air to the premises. In addition, with the consequent reduction of the wind speed or the decrease of the pressure drop windproof valve remains in the closed state ("sticks"), re-opening at a lower differential pressure than at closing. Forms a hysteresis loop - closure windproof valve is under the same pressure differential, the opening - when each is H. In the supply device runs unevenly, which leads to fluctuations in the inlet air supply and, consequently, deterioration of the ventilation system of the building as a whole.

Object of the invention is the provision of uniform receipt of the required quantity of fresh air at different values of wind or thermal differential pressure and the differential pressure created by the exhaust mechanical ventilation.

This technical result is achieved by the fact that windproof valve consists of a housing with thrust plate and several airtight petals of different weight, made in the form of segments with a given curvature of the surface relative to the plane of the petal, pinned at the sides of the case windproof valve can be moved about the axis of the fastening; petals windproof valve made with stiffeners of variable cross section with an extension in the lower part; noise insulation liner is made of a porous material and contains a series of inclined slots, made at an angle to the front surface.

The use of petals of different mass provides a smooth change in the flow rate of supply air through a consistent closed (pressure) of the petals to the valve body depending on the differential pressure and m is ssy petals. The implementation of the petals with a given curvature of the surface provides the required air flow when they are closed (zachlapywaniu) due to loose contact with the thrust plate.

At small pressure drops all the petals are in a vertical position and the outside air enters the room through a windproof flap with minimal aerodynamic drag. With increasing pressure drop, for example, due to the increase in wind speed of the lung lobes is closed, thereby reducing the cross-section for the passage of air and therefore ensuring the constancy of the total air flow through the inlet valve. With further increase of the pressure drop in the closed petals with a higher mass.

So when all the petals of the intake valve continued to provide the desired air flow, the petals are made with a curved surface, and when pressed close to the body loosely. With increasing pressure drop with closed petals, changing the flow of air through the windproof valve occurs due to elastic deformation of the petals themselves.

Return petals in the initial position upon reduction in pressure differential occurs when the closed petals at the expense of elasticity, with further decrease of pressure differentials - is and means of gravitational forces. To reduce the effect of "sticking" the petals are made with stiffeners of variable cross-section increasing in the lower part. As a result, the center of gravity of the petal has shifted outside of the petals, which leads to his return to the upright position when the corresponding differential pressure.

Thus, by setting a certain mass of petals, the curvature of the surface, the size and shape of the ribs it is possible to provide a desired flow of air through the air supply device regardless of wind pressure differential or mechanical ventilation.

To improve the sound insulation inside the supply device is noise insulation liner, made of porous materials that absorb part of the energy of the sound wave traffic noise. To reduce the aerodynamic drag, noise insulation liner is performed with vertical slots arranged at an angle to the front surface. In the sound wave is reflected from the walls of the slots of the liner, not having a through lumen, and is partially absorbed by the walls of the porous material.

The claimed supply device differs from the prototype in that windproof valve is composed of several lobes of different masses with ribs with smashinn the m center of gravity and made in the form of segments with a given curvature of the surface. Thus, the proposed device meets the criterion of "novelty."

The claimed technical solution implementation windproof valve petals of various masses, given by the curvature of the surface and include ribs with a displaced center of gravity provides him with a new property - uniform air flow through the device at various pressure drops without sticking. The availability of new properties shown in the inventive solution provides him with the requirement of "inventive step".

The invention is illustrated by the attached drawings, in which figure 1 shows a General layout diagram of the supply device, figure 2 shows a schematic depiction of the flap valve figure 3 - schematic image noise insulation liner.

The supply device includes: an insulated housing 1, within which are windproof valve 2, noise insulation liner 3, the filter 4, the adjustable air outlet grille 5, the outer protective grille 6.

Windproof valve 2 in turn consists of a body 7 with the thrust rod 8 and a few windproof petals 9 with ribs 10. Windproof petals 9 pivoted in the casing wall 7 can move relative to the axis of the fastening. Windproof petals made with a given distorting the heat surface, providing a loose fit to the thrust rod 8.

Noise insulation liner 3 supply device is made in the form of a parallelepiped of porous material with inclined slots 11, arranged at an angle to the front surface noise insulation liner.

The principle of operation of the supply device to the next. A supply air device is mounted in the outer wall of the building below the window sill for a heating appliance or regardless of the window. In the presence of the pressure differential with inner and outer sides of the building, caused by the difference of air temperature, wind effects or exhaust fan mechanical ventilation, outside air enters through the outer protective grille 6 inside the supply device. When a small differential pressure windproof petals 9 are in a vertical position and the intake air passes through between the petals 9 and the thrust plate 8 over the entire area windproof valve. Next the air passes through the vertical slots 11 noise insulation liner 3, passes through the filter 4, the adjustable air outlet grille 5 and enters the room. In this part of the sound wave, for example, noise, urban transport, is reflected from the walls of the vertical slots 11 and is absorbed by the porous material, noise insulation liner 3 and the dust, fluff and other impurities contained in the supply air, trapped by the filter 4.

With increasing pressure drop, for example, due to increased wind speed and, accordingly, increasing the speed of the air flow passing through windproof valve 6, one of windproof petals 9 having the smallest mass, is closed, clinging to the thrust rod 8, thereby reducing the free cross-section for the passage of supply air. With further increase of pressure drop are closed the rest of the petals, however, due to their curvature and gapping the thrust rod 8 will slit through which supply air continues to flow through the abs valve. When the airflow is already due to elastic deformations windproof petals. This solution provides the possibility of automatic regulation of the flow of supply air in a wide range of pressure differentials.

When reducing the pressure differential part windproof petals 9 elasticity restores form, increasing the area for the passage of air. With further decrease of the pressure drop petals 9 with the highest weight lowered in a vertical position, further increasing the area for the passage of air. The presence of the ribs 10 with an offset center of gravity provides displacement is giving petals 9 without "sticking".

If necessary, the flow of air through the air supply device may further be adjusted manually by changing the cross section of the grille 5.

At the location of the supply device for the heating device, additional air is heated by heat exchange and mixing with the warm air from the heater.

The presence of the filter and noise insulation liner ensures complete closure of the inlet device and the absence of air filtration increase thermal resistance and reduce the likelihood of condensation on the surface of the grille.

Use new elements of the flap valves of different masses, with a curved surface and having stiffeners of variable cross-section provides the autoregulation of flow of the fresh air, providing the required ventilation of the premises at different extremes of heat or wind pressure. The presence of stiffeners of variable cross section with an offset center of gravity ensures the opening of the flap valves without "sticking".

1. A supply air device, embedded in the envelope of buildings, comprising an insulated housing, windproof valve, noise insulation liner, filter and adjustable ventilation grille, characterized in that Petrosa any valve consists of a housing with thrust plate and several airtight petals of different masses, made in the form of segments with a given curvature of the surface, providing a loose fit to the thrust rod, pivoted in the walls of the shell windproof valve can be moved about the axis of the fastening.

2. A supply air device according to claim 1, characterized in that the petals windproof valve made with stiffeners of variable cross section with an extension at the bottom.

3. A supply air device according to claims 1 and 2, characterized in that the noise insulation liner is made of a porous material and contains a series of inclined slots, made at an angle to the front surface.