Air humidification device

The invention relates to a device for air humidification with a housing with a vertical axis that accommodates a fan and has an axial air intake opening and peripheral outflow openings for the sucked air, and with an annular distributor line which can be connected to a pressure line for a spray liquid and is provided above the outflow openings , which carries nozzles distributed over the circumference of the housing for atomizing the spray liquid to form a liquid mist.

For air humidification in rooms, it is known to atomize a spray liquid, generally water, into a liquid mist which is distributed with the aid of an air flow. For this purpose, a housing with an axial fan is arranged below the ceiling of a room to be humidified, via which room air is sucked in through a lower housing opening in order to be deflected in the area of ​​an upper housing cover and blown out radially through an annular gap between the housing and cover. Since an annular distributor line connected to a pressure line for the spray liquid with nozzles distributed over the circumference of the ring for atomizing the spray liquid is arranged on the housing cover, the resulting liquid mist is captured by the air sucked in from the room and flowing radially out of the housing and distributed in the room . The cooling of the air laden with the liquid mist causes a sinking flow, which, depending on the outflow speed of the air from the housing, carries the risk that part of the blown air will get into the suction area of ​​the blower, which is due to the flow short circuit that is forming leads to overhumidification of the blown air. As a result of such overhumidification of certain areas of the room air, precipitation of moisture must be expected. In addition, the axial fans used require a comparatively large overall height and the air deflection in the area of ​​the housing cover entails flow losses.

In order to be able to advantageously apply air to be heated to a heating register, it is known (US Pat. No. 5,489,238 A) to use a radial fan with a housing, in the bottom of which an air intake opening is provided. With such a radial fan an advantageous radial distribution of the air exiting through outlet slots in the circumferential wall of the housing can be achieved, but with such a known radial fan the risk of overhumidification of the blown air, which occurs with air humidification devices, cannot be avoided.

The invention is therefore based on the object of designing a device for air humidification of the type described above so that the liquid mist resulting from the atomization of the spray liquid can advantageously be distributed in the room by the air blown out of the housing without local overhumidification by a having to fear the blower short-circuiting partial flow of the blown air. In addition, simple construction conditions with a low overall height should be ensured.

The invention solves the problem in that the air intake opening is on the top of the housing and that the housing in the area of ​​the circumferential outflow 45 openings receives an air guiding device for the fan formed in a known manner as a radial fan.

As a result of these measures, the room air is sucked into the housing from above, while the air blown radially out of the housing is superimposed on a sinking movement due to the cooling by the atomized spray liquid, so no short air flow can form over the fan even at a low outflow speed of the blown air so that local overhumidification of the air laden with the liquid mist can be excluded. In addition, the air guiding device in the area of ​​the circumferential outflow openings of the housing in cooperation with the use of a

Radial fan advantageous on the distribution of the air flow depending on the nozzles3

AT 413 146 B arrangement influence can be taken, resulting in a uniform and effective

Humidification leads. In this connection it should also be considered that the air sucked in above the housing has a higher temperature than the air below the fan due to the usual temperature rise, so that the evaporation of the liquid mist that forms is supported. The heat dissipation from the upper areas of the room also results in a more even temperature distribution within the room. Finally, the use of a radial fan allows a comparatively low overall height, because separate deflection devices for the axially sucked in air flow are unnecessary and the flow losses associated therewith are avoided.

In order to create particularly simple construction conditions, the housing can consist of a bottom and a top shell as well as of radial guide webs of the air guiding device which are attached between the axially spaced apart shells and are distributed over the circumference. The radial guide bars can thus be used to connect the bottom and the

Ceiling shell are used and then form spacers between the floor and ceiling shell. If the bottom and top shells are connected to the guide bars independently of one another, then by simply removing the top shell, advantageous accessibility to the radial fan and the control and drive devices that may be arranged with the radial fan can be created. Due to the use of a radiator fan, a pump for the spray liquid can also be accommodated in the housing without having to accept an excessive height, so that such aerators then only have to be connected to a supply for the spray liquid and to a power supply.

Appropriate protective measures must be taken so that access to the rotor of the radial fan through the peripheral outflow openings in the housing can be prevented. For this purpose, the radial guide webs can be designed as supports for protective lamellas running in the circumferential direction, which creates simple construction requirements without endangering the removal of the cover shell from the rest of the housing.

The subject matter of the invention is shown in the drawing, for example. Show it

1 shows a device according to the invention for air humidification in a partially torn plan view and

FIG. 2 shows this device in a section along the line II-II in FIG. 1 on a larger scale.

According to the exemplary embodiment, the illustrated device for air humidification has a housing 1 which consists of a bottom shell 2 and a top shell 3 arranged at an axial distance from the bottom shell 2. The two shells 2 and 3 are connected by radial guide webs 4 of an air guide device 5 distributed over the circumference. A fan 6 designed as a radial fan is inserted into the housing 1 coaxially to the air guiding device 5. The room air sucked in via the rotor 7 of the radial fan through an air intake opening 8 in the ceiling shell 3 is blown out radially through the outflow openings 9 between the shells 2 and 3 and the guide bars 4, the guide bars 4 of the air guiding device 5 exerting a directional effect on the exiting air currents . The air streams exiting through the outflow openings 9 can therefore be aligned with the nozzles 10 provided for atomizing the spray liquid via the air guiding device 5, which creates an advantageous prerequisite for evenly distributing the resulting liquid mist over the outflowing blown air.

The nozzles 10 are arranged along an annular distributor line 11 which is connected in a conventional manner to a pressure line for the spray liquid. The distribution line 11 is composed of individual pipe sections 12, which are connected to one another by intermediate pieces

13 are connected. For connecting the pipe sections 12 on the one hand and the nozzles 10 on the other

AT 413 146 B, the circular cylindrical intermediate pieces 13 are provided with connection bores which intersect in the axis of the intermediate pieces 13 and into which the pipe sections 12 or the

Nozzles 10 are screwed in. This construction has the advantage that the pipe sections can be designed with a comparatively small diameter regardless of the structural specifications for connecting the nozzles 10, which leads to an independent venting of the

Distribution line 11 leads through the spray liquid. The intermediate pieces 13 can also be used advantageously for fastening the distribution line 11 on the ceiling shell 3. For this purpose, the intermediate pieces 13 have through holes for fastening screws 14.

As can be seen in FIG. 2, the shells 2 and 3 of the housing 1 are each connected to the guide webs 4, preferably consisting of plastic profiles, via outer cover caps 15 which pass through the shells 2 and 3 by means of screws 16 and 17 are screwed. Due to this measure, the bottom shell 2 or the top shell 3 can be removed from the rest of the housing 1 by loosening the screws 16 or 17, which allows easy access to the fan 6 and the other control and drive devices housed in the housing 1.

So that access to the rotor 7 of the blower 6 through the outflow openings 9 is prevented, the guide webs 4 have protective lamellae 18 extending in the circumferential direction, which snap into corresponding locking recesses in the guide webs 4. Since the protective lamellas 18 are thus neither connected to the bottom shell 2 nor to the top shell 3, these protective lamellas 18 cannot hinder the optional removal of these shells 2 or 3. It does not need to be particularly emphasized that the air intake opening 8 must also be provided with a corresponding protective grille 19.

Since the room air is sucked in from above through the suction opening 8 via the rotor 7 of the blower 6, but the air blown out radially via the air guiding device 5 is subjected to a sinking movement due to the cooling by the spray liquid atomized with the aid of the nozzles, the with the resulting Liquid mist-laden air is moved away from the suction area of ​​the fan 6 regardless of the outflow speed from the housing 1, which excludes overhumidification by partial air currents short-circuited via the fan 6.