CZ289683B6 - Ventilation unit provided with axial fan - Google Patents

Abstract

In the present invention there is disclosed a ventilation unit having an axial fan (2) and consisting of a single axial fan (2) and two partitions (3) and (5) located in a common casing (1). The suggested ventilation unit is characterized in that the partitions (3) and (5) located in a suction sector (4) and an exhaust sector (6) and separating air flows (Ve), (Vi) and (Vv), (Vo) are offset by a certain distance from edges of the axial fan (2) blades. The partitions are wholly or partially rotatable about axes (12) and (13). In the casing (1) there is preferably fitted a recuperative plate heat exchanger (14) or a rotary heat exchanger (17).

Description

Technical field

The invention relates to an axial fan ventilation unit for ventilation, hot-air heating and cooling of civil buildings and industrial hall and workshop spaces.

BACKGROUND OF THE INVENTION

Current ventilation units are designed as monofunctional, for circulating hot-air heating or with a mixing chamber for overpressure ventilation of buildings. Exhaust air is then vented through the openings of windows and skylights, or separate exhaust fans must be added.

These systems completely eliminate the use of efficient recovery of heat from the exhaust air, and the operation of ventilation at rising energy costs is considerably uneconomical as it does not allow the recovery of waste heat generated in buildings from installed technology, lighting and human metabolism. The ventilation or assembly units used in each case consist of two separate supply and exhaust air sections with only two fans. The units are space-intensive, expensive and cannot be installed directly in ventilated building areas and require installation in special air-conditioning machine rooms with demanding air ducting.

SUMMARY OF THE INVENTION

The essence of an axial fan ventilation unit consisting of a single axial fan and two baffles housed in a common enclosure is that the intake sector partition separating the fresh and exhaust air streams is offset some distance from the leading edges of the axial fan blades and the exhaust sector baffle separating the supply and exhaust streams. the air is offset a certain distance beyond the rear edges of the axial fan blades. The separating partitions are thereby rotatable in whole or in part about the axes of rotation. In a common housing, preferably a hot-water or cooling register or a heat recovery plate or rotary heat exchanger is installed. The ventilation unit according to the invention provides a separate supply of fresh air at the same time as the exhaust air by means of a single impeller of axial fan with double-sided baffles, with minimum shorting between the two air streams.

In the version with revolving partitions, the ventilation unit also provides circulation hot-air heating or cooling, with the possibility of a combined operating mode when setting the position of the revolving partitions to the mixing system of heating and equal-pressure ventilation.

In the variant with recuperation heat exchangers, the ventilation unit also ensures efficient recovery of heat or cold from the exhaust air during ventilation or cooling, or a combined operating mode when setting the position of the rotary partitions to the mixing and heating system with equal pressure ventilation with heat recovery.

Compared to the ventilation units used so far with two mostly radial fans, the ventilation unit according to the invention has considerably smaller dimensions, lower weight and significantly lower production costs.

In comparison with monofunctional circulating heating units with only ventilating air supply for pressurized ventilation, the ventilation unit according to the invention also allows the exhaust air to be ventilated together in a single integrated unit, simultaneously with efficient use of heat, or

Cooling from exhaust air, possibly also in combined mode of heating and equal-pressure ventilation. At the same time, the total electric power consumption of the axial fan electric motor in circulating hot-air heating mode is reduced by up to 60% compared to the wall-mounted ventilation units with radial fans.

The ventilation unit according to the invention can be designed in wall or ceiling form in practically any functional assembly and combination of individual units.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings show, in vertical section, examples of ventilation designs for ventilation, hot-air heating and cooling according to the invention in wall form with rotating partitions.

Fig. 1 shows the ventilation unit in the basic assembly with the baffles set to equilibrium ventilation mode with air heating.

In Fig. 2, the ventilation unit with the baffles converted to the circulation heat mode 20 of the air heating without ventilation is shown.

Fig. 3 shows a ventilation unit with removable bulkheads for the combined operating mode of circulation heating and equal pressure ventilation with air heating.

Fig. 4 shows a ventilation unit with a connected recuperative heat exchanger with baffles set to a ventilation equal pressure mode during the heating period with reheating.

Fig. 5 shows a ventilation unit with a rotary heat exchanger connected with baffles set to the combined operating mode of circulating hot-air heating and equal-pressure ventilation with preheating and reheating of supply air.

DETAILED DESCRIPTION OF THE INVENTION

The axial fan ventilation unit according to FIG. 1 consists of a housing 1 in which the axial fan 2 is mounted vertically, a rotatable angled partition 3 of the intake sector 4 separating the fresh air streams V and exhaust air VI, a split partition 5 of the exhaust sector 6 air Vv and exhaust air Vo. At the end of the exhaust sector 6, a hot water register 7 with an exhaust louver 20 is obliquely mounted, and at the beginning of the suction sector 4 a filter 8 is positioned vertically. In the side of the housing 1 there is a suction opening 9 a fresh air intake opening 10 and an exhaust air exhaust opening 11 are located. The rotary partition 3 rotates about axis 12 and a portion of the rotary partition 5 rotates about axis 13. Referring to FIG. 4, a recuperative plate heat exchanger 14 with two flaps 15 of two-sided bypasses for changing the air flow Vo and Ve during summer operation and a prefilter 16 is diagonally mounted in the housing 1.

According to FIG. 5, a rotary exchanger 17 with a drive motor 18 with fixed horizontal partitions 19 is mounted vertically in the housing 1.

-2GB 289683 B6

Industrial applicability

The ventilation unit according to the invention is universally applicable for duct-free decentralized hot-air heating, equal-pressure ventilation and cooling of industrial halls, small workshops, workshops, shopping centers, sports halls and gyms, wherever a comfortable environment is required heat, possibly cold, from the exhaust air.

PATENT CLAIMS

Claims (5)

An axial fan ventilation unit comprising a single axial fan (2) and two baffles (3, 5) housed in a common housing (1), characterized in that the baffle (3) of the suction sector (4) separates the streams fresh air (Ve) and exhaust air (Vi) is offset some distance from the leading edges of the axial fan blades (2) and the exhaust sector (6) separating the supply air (Vv) and exhaust air (Vo) streams (Vo) ), it is offset a certain distance beyond the rear edges of the axial fan blades (2). Axial fan ventilation unit according to claim 1, characterized in that the entire partition (3) is pivotable about an axis (12) and that part of the partition (5) is pivotable about an axis (13). Axial fan ventilation unit according to Claims 1 and 2, characterized in that a hot-water or cooling register (7) is mounted in the housing (1). Axial fan ventilation unit according to claims 1 to 3, characterized in that a plate-type heat exchanger (14) with by-pass flaps (15) is mounted in the housing (1). Axial fan ventilation unit according to claims 1 to 3, characterized in that a rotary heat exchanger (17) with a drive motor (18) is mounted in the housing (1).