CZ2016232A3 - A roof-mounted air-conditioning unit with a built-in silencer - Google Patents

Abstract

A rooftop air handling unit with a built-in silencer consisting of a unit housing (1) equipped with a counter-current recovery exchanger (3), a supply air fan (5), an exhaust air fan (7), and an elevated base frame (2) of which the essence is that the chamber (4) of the supply air fan (5) adjoins the upstream sector (8) of the upstream recuperative exchanger (3) from the upstream sector (6) and the upstream sector (9) of the upstream recuperative exchanger ( 3), wherein the inlet sector (8) and the outlet sector (9) are identically oriented towards the external supply air neck (16) and the external exhaust air neck (17), wherein the opposite inlet sector (10) of the upstream recuperative exchanger (3) a draw-off sleeve (13) and an acoustic exhaust damper (15) follow, and that at the opposite inlet s The countercurrent (11) of the upstream recuperative exchanger (3) adjoins the inlet nozzle (12) and the acoustic inlet air damper (14), the acoustic dampers (14) (15) being located inside the raised base frame (2).

Description

Roof air handling unit with built-in silencer

Field of technology

The invention relates to a roof air-conditioning unit with a built-in silencer intended for equal pressure ventilation with waste heat recovery of residential and civil buildings, with high demands on acoustic attenuation.

Prior art

Currently used roof ventilation units with heat recovery are designed mainly as central units in a compact or compositional modification, with adjoining air ducts along the roof of buildings, where these often large ducts directly exposed to the weather must be designed as perfectly thermally insulated, with risk penetrations. roof structure. Nevertheless, there are significant heat losses in these distributions, and thus the heat gains obtained by recuperation exchangers are devalued. The distribution systems completely devalue the roof area of the building for future installations of photovoltaic power plants, and at the same time the maintenance of roof coverings and risk penetrations of pipe supports is significantly complicated.

Duct silencers installed as a fixed part of roof air distribution systems are practically uncleanable without complete disassembly of the ducts, including their insulation and sheathing.

The essence of the invention

The current shortcomings are eliminated by a roof air handling unit with built-in silencer, consisting of a unit housing containing a countercurrent recuperation exchanger, supply and exhaust air fans, and a raised base frame, the essence of which is the supply fan chamber adjoins the inlet sector of the countercurrent recuperation exchanger and chamber. of the exhaust fan is connected from below to the outlet sector of the countercurrent recuperation exchanger, where the inlet and outlet sectors of the countercurrent recuperation exchanger are identically oriented towards the external ports of the unit, while the opposite inlet and outlet sectors of the countercurrent recuperation exchanger are connected to the acoustic muffler necks, which are located in the space of the raised base frame of the unit.

The main advantage of a roof air handling unit with a built-in silencer is that when it is installed directly above the roof penetrations, eg above the ventilation shafts of multi-storey residential buildings, all problematic roof air distribution systems, including silencers, are completely eliminated. This completely eliminates their heat loss, risky anchoring over the roof cladding, and frees up the entire roof area for future installations.

-photovoltaic power plants.

Built-in silencers use the space of the raised base frame of the unit, which ensures their easy cleaning through service openings on the side of the base frame, and at the same time suitably increases the height of the suction nozzle above the roof covering with regard to snowing and hot air in summer over a flat roof.

By placing the outdoor supply air fan on the supply side to the countercurrent recuperation exchanger, a safe overpressure is achieved, which eliminates any short-circuit of pollutants from the exhaust air, and at the same time significantly reduces the supply fan noise to buildings.

Overview of pictures

Fig. 1 shows a roof air handling unit with a built-in silencer in a plan view of the upper body of the unit.

Fig. 2 shows a vertical section of the roof unit A - Á guided by a supply air sector.

Fig. 3 shows a vertical section of the roof unit B - B guided by the exhaust air sector.

Examples of embodiments of the invention

The roof air handling unit with built-in silencer according to Figs. 1 to 3 consists of a unit housing 1 and a raised base frame 2 located under the housing 1, in which a countercurrent recuperation exchanger 3, supply air fan ei, exhaust air fan h, the inlet sector 8 of the countercurrent recuperation exchanger 3 is connected to the chamber 4 of the supply air fan 5, and the outlet sector 9 of the countercurrent exchanger is connected to the chamber 6 of the exhaust air fan 7. The opposite inlet sector 10 of the countercurrent recuperation exchanger 3 is connected to the exhaust nozzle 13 and the acoustic silencer 15 of the extracted air, to the opposite outlet sector 11 of the countercurrent recuperation exchanger 3 is connected to the supply nozzle 12 and the acoustic muffler 14 of the supply air. The outer neck 16 of the supply air and the outer neck 17 of the exhaust air are located in the longitudinal walls of the housing 1 of the unit. In the front wall of the raised base frame 2, there is a cleaning hole 18 for access to the acoustic muffler 14 of the supply air and a cleaning hole 19 for access to the acoustic muffler 15 of the exhaust air.

The symbols ei denote the supply of outside air, the symbol £ 2 denotes the supply of outside air to the building, the symbol ii denotes the supply of exhaust air to the unit, the symbol 12 denotes the exhaust of the exhaust air.

Claims (3)

PATENT CLAIMS * ’** A roof air handling unit with a built-in silencer, comprising a unit housing (1) equipped with a countercurrent recuperation exchanger (3), a supply air fan (5), an extract air fan (7), and further comprising a raised base frame (2). , characterized in that the chamber (4) of the supply air fan (5) adjoins the inlet sector (8) of the countercurrent recuperation exchanger (3) from above and the outlet sector (9) of the countercurrent recuperation exchanger adjoins the chamber (6) of the exhaust air fan (7). exchanger (3), wherein the inlet sector (8) and the outlet sector (9) are equally oriented towards the outer inlet (16) of the supplied air and the outer inlet (17) of the exhaust air, with the opposite inlet sector (10) of the countercurrent recuperation exchanger ( 3) is connected to the exhaust port (13) and the acoustic silencer (15) of the exhaust air, and that * to the opposite outlet sector (11) of the countercurrent recuperation exchanger (3) is connected to the supply port (12) and the acoustic a supply air damper (14), the acoustic dampers (14JT, {15) being located inside the space of the raised base frame (2). 2. Roof air handling unit with built-in silencer according to item 1, characterized in that a cleaning opening (18) is arranged in the front wall of the raised base frame (2) for access to the acoustic silencer (14) of the supply air and a cleaning opening (19). for access to the acoustic silencer (15). 3. A roof air handling unit with a built-in silencer according to items 1 and 2, characterized in that the acoustic silencers (14J, {15) are arranged in the form of a labyrinth.