WO2009098041A1

WO2009098041A1 - Under-floor ventilation device and method for air conditioning a room

Info

Publication number: WO2009098041A1
Application number: PCT/EP2009/000748
Authority: WO
Inventors: Georg Pfeiffer
Original assignee: Pluggit International B.V.
Priority date: 2008-02-04
Filing date: 2009-02-04
Publication date: 2009-08-13
Also published as: DE102008007641A1; DE102008007641B4

Abstract

The invention relates to a ventilation device (1) and an associated method, comprising at least one heat exchanger (4) for the temperature control of air, with which at least one ventilator temperature control module (11) of the ventilation device (1) is associated, wherein the ventilator temperature control module (11) has at least one ventilator (8) for forcing a flow of air in heat contact with the heat exchanger (4) and suctioned in through at least one suctioning opening (6) of the ventilation device (1) past said heat exchanger. The ventilation device (1) further comprises an induction temperature control module (12) operating according to the induction principle.

Description

UNDERFLOOR UNIT AND METHOD FOR AIR-CONDITIONING A ROOM

The invention relates to a method for air conditioning a room and a ventilation unit with at least one heat exchanger for temperature control of air, which is associated with at least one fan Temperierungsmodul the ventilation unit, wherein the fan Temperierungsmodul at least one fan for forcing a flow of at least one suction Opening the ventilation device sucked air in thermal contact with the heat exchanger has past this.

Such ventilation units are used for example for ambient air temperature control. The fan makes it possible to suck in room air into the ventilation unit and to return it to the room after it has been heated by the heat exchanger. It goes without saying that instead of heating and cooling in the sense of air conditioning can take place. The forced circulation by means of the fan can achieve high air velocities, which, however, are associated with pronounced turbulence and generally with a high noise level.

Object of the present invention is to provide a ventilation device with lower noise level while high ventilation performance, which is particularly variable and has a compact design possible.

This object is achieved by a ventilation device with the features of claim 1 and a method having the features of claim 10. Advantageous embodiments and further developments are specified in the dependent claims. An inventive ventilation device with at least one heat exchanger or convector for temperature control of air, which is associated with at least one fan Temperierungsmodul the ventilation unit, wherein the fan Temperierungsmodul at least one fan for forcing a flow of sucked by at least one suction port of the ventilation device in thermal contact with the Heat exchanger or convector has past this, also has at least one operating on the induction principle induction Temperierungsmodul.

The inventive combination of a fan Temperierungsmoduls and an induction Temperierungsmoduls in a ventilation device can be accessed or adjusted depending on the conditions and requirements individual operating profiles that are adapted for example to the user preferences and / or daily or seasonal. Thus, with such a ventilation device at a very low noise level nevertheless a high air conditioning or ventilation performance can be achieved. At the same time, the ventilation unit is characterized by a compact design and individual installation options. The ventilation unit is in particular part of a ventilation installation in a building. Common heat exchangers can be used as heat exchangers, for example from a heat exchanger fluid through streamable tubes which are arranged in the fan air flow. The heat exchange fluid can serve both as a heating medium and as a cooling medium. If only a heating effect is desired, a convector can be used, the z. B. consists essentially of electrically heatable wires or the like.

When the suction opening of the fan temperature control module opens into the room to be air-conditioned, the ventilation unit can operate in recirculation mode. For the induction tempering module, an inlet opening is preferably provided, which allows the inflow of fresh air. The induction principle is based on the fact that when flowing through an ejector nozzle by a primary air flow in the flow direction behind the ejector nozzle, a negative pressure can be generated, which is used to suck in another air flow in a section behind the ejector nozzle. In this case, the induction principle uses the energy provided, for example, by the flow velocity of fresh air for intake of room air.

For a particularly quiet operation of the ventilation unit, it is advantageous if the induction temperature control module is a passive module. This means that it is possible to dispense with a fan or the like in the induction temperature control module. In particular, no active means are provided which increase a pulse of the air flowing into the induction Temperierungsmodul airflow. A regulation of the flow velocity takes place, for example, by means of ventilation flaps, which are provided at one and / or a plurality of outflow openings or else in a line cross section in the interior of the induction temperature control module.

The ventilation device according to the invention can be kept particularly compact, when the heat exchanger or convector is used both for controlling the temperature of the air flow of the fan Temperierungsmoduls and the air flow of the induction Temperierungsmoduls, the Temperierungsmodulen different sections of the heat exchanger or convector can be assigned. Thus, a heat exchanger or convector of a fan Temperierungsmoduls can be used simultaneously for controlling the temperature of air through the induction Temperierungsmodul by the induction temperature control module associated air flow is also passed to the heat exchanger or convector or through it.

Alternatively or additionally, according to a further embodiment, it can be provided that at least one further heat exchanger or convector is provided for the purpose of temperature control. tion by the induction Temperierungsmodul serves. This allows a better thermal decoupling of tempered by the various modules airflows. In particular, the fact that the air flow to be tempered by the induction tempering module generally has a lower temperature than the air flow to be tempered by the fan tempering module can be taken into account by means of an additional heat exchanger or convector.

The fan temperature control module and the induction temperature control module can be arranged in different structural variants. In a first embodiment with a longitudinal arrangement, it is provided that at least one fan tempering module and at least one induction tempering module are arranged adjacent to each other, in particular in series, and that each of these is assigned a longitudinal section of at least one heat exchanger or convector. In particular, exactly one heat exchanger or convector is assigned to the temperature control modules. In a heat exchanger formed essentially by a plurality of heat exchanger tubes protrudes this heat exchanger z. B. in about halfway into each of the modules, if exactly two modules are provided. The temperature control modules used are fluidically separated from each other.

It is preferred if the temperature control modules are arranged in series along the heat exchanger or convector. For example, in each case two or more fan temperature control modules and induction temperature control modules can be lined up alternately along the heat exchanger. The heat exchanger extends through all of the modules used. This results in an alternating sequence of the corresponding outflow openings of the respective modules a more homogeneous total air flow into the room. In an alternative or additional embodiment, it is provided that at least one fan tempering module and at least one induction tempering module adjacent to each other, in particular one above the other, are arranged, and that each at least one side portion of at least one heat exchanger or convector is assigned. The lateral section is in particular a longitudinal side. For example, in the case of a horizontally extending heat exchanger or convector, the upper side can be assigned to the fan temperature control module and the lower side to the induction temperature control module. Advantageously, this arrangement allows a closely spaced arrangement of the respective outflow openings of the various Temperierungsmodule and a compact structure. For this purpose, the induction tempering module is preferably integrated in a housing which is essentially identical to an ordinary fan tempering module. A favorable structural arrangement can also be achieved by arranging the heat exchanger or convector between the fan tempering module and the induction tempering module.

For a possible independent operation of the respective modules from each other is provided that the Temperierungsmodulen are assigned separate outflow openings.

With regard to a possible low-vortex and low-noise outflow, it may be advantageous if, in accordance with an embodiment of the invention, the particular adjacent outflow openings have the same outflow direction. The outflow openings can be z. B. be configured so that substantially parallel flow curtains are formed by the fan temperature control module and the induction Temperierungsmodul. In the aforementioned embodiments, the fan temperature control module and the induction temperature control module are preferably both individually, ie independently of each other, as well as operated together. In particular, the modules are fluidically separated from one another so that an independent adjustment of the operating parameters of the respective modules can take place.

The invention also relates to a method for conditioning a room by means of a ventilation device with at least one heat exchanger or convector, in particular according to one of the embodiments described above. In this case, at least a first room air stream is sucked with at least one fan and passed to the temperature control of the heat exchanger or convector and delivered in a first supply air to the room. Further, the flow of a primary air stream is used to generate a suction to suck in at least one other room air flow and to unite with the primary air flow to a mixed air stream, which is delivered to the room as supply air. In this case, the primary air flow, the further room air flow and / or the mixed air flow for temperature control are conducted past the at least one heat exchanger or convector or to a further heat exchanger or convector. The generation of the suction effect is preferably passive, wherein the primary air flow, z. B. fresh air, inherent impulse is used. Instead of the first and / or second room air flow, external air can also be supplied via the fan or according to the induction principle. Preferably, however, it is room air. As a result, the temperature control of the primary air flow, which serves, for example, primarily for the supply of fresh air, can be effected by the further room air flow and / or by the heat exchanger.

According to a development of the method, it is provided that the air streams to be tempered are guided past the same heat exchanger or convector, in particular on different sides. For an efficient Operation of the ventilation unit, it is advantageous if the ratio of the first and second supply air flow into the room is set in dependence on at least one environmental parameter. The ratio of the two supply air flows is to be understood in particular the ratio of the respective air mass flows. Advantageously, depending on the ambient conditions or on the user-desired application profile, optionally the first and / or the second supply air flow into the room can be fully activated or completely deactivated or continuously adjusted to another value. For example, to achieve high performance, in particular for preconditioning of a room, the second supply air flow can be almost deactivated, so that the temperature of the room is mainly caused by the first supply air flow. On the other hand, especially when only lower ventilation services are to be demanded, the first supply air flow can be at least almost deactivated, whereas the second supply air flow is used for low-noise ventilation or temperature of the room.

To improve comfort, the first and second supply air flows can be controlled as a function of the time of day or the season. In particular, a control depending on the temperature difference between the room and the environment or alone based on the outside temperature can be made. For example, during the nighttime, the induction temperature control, which has only a very low noise level, can be used, while the fan temperature control module is used more intensively during the daytime. In addition, for example, the fan temperature control module can be used increasingly when a temperature difference between the outside air, ie the primary air flow, and the inside air, ie the first room air flow, exceeds a certain threshold. For example, the fan temperature control module comes increasingly in winter and the induction temperature control module is increasingly used in summer. According to one development of the method, it is provided that the generation of the first and / or the second supply air flow is controlled as a function of an ambient noise level. For example, the ventilation unit can automatically detect whether - for example, at night - a low noise level and therefore switch to quietest possible operation, namely to operate essentially with the second supply air from the induction tempering module. On the other hand, if a higher noise level is detected, a less noiseless operation can be selected, for example, by increased use of the first supply air flow from the fan Temperierungsmodul.

For the least possible low-circulation air circulation, it may be favorable if, according to one embodiment of the method, the first and second supply air streams emerge from the ventilation unit in the same direction of flow. In this case, it is preferable if both supply air flows into the space have at least approximately the same flow velocity.

In the following the invention will be explained schematically and by way of example with reference to the drawing. However, the invention is not limited to the feature combinations shown there. Rather, in the description and / or the figures illustrated features, each individually or in combination and regardless of their relationship in the claims, be essential to the invention. Show it:

1 in cross section a ventilation device according to a first embodiment of the invention,

FIG. 2 shows a plan view of the ventilation device shown in FIG. 1, FIG. 3 is a plan view of a ventilation device according to a second embodiment of the invention,

4 in cross section along the line A-A the ventilation device shown in Figure 3, and

Fig. 5 in cross section along the line B-B, the ventilation device shown in Fig. 3.

The ventilation device 1 has in a common housing 2 a substantially formed by a plurality of tubes 3 heat exchanger 4. For sucking a first room air flow 5 from a room to be tempered, a suction opening 6 is arranged in the housing upper side 7.

This first room air stream 5 passes through the heat exchanger 4 as a result of the suction effect of a fan 8, whereby the first room air flow 5 is tempered. For temperature control, the tubes 3 are flowed through by a suitable heat exchanger fluid. In this way, depending on the needs, a heating or cooling of the first room air stream 5 take place.

The tempered in this way air leaves the housing 2 and the ventilation device 1 as the first supply air flow 9 through a first outflow opening 10 into the room. The fan 8, the heat exchanger 4 and the first outflow opening 10 are combined in a fan temperature control module 11.

Below the fan-temperature control module 11, an induction Temperierungs- module 12 is arranged, which is fed by a primary air stream 13. This primary air flow, for example fresh air, flows through an ejector nozzle 14, so that a negative pressure is generated in a downstream pipe section 15. This causes a further room air flow 16 through the heat exchanger. 4 or is sucked past this in the pipe section 15. In this case, the further room air flow 16 is mixed with the primary air flow 13 and tempered by the heat exchanger 4. The further room air stream 16 and the primary air stream 13 are combined in the pipe section 15 to form a mixed air stream 17, which emerges from the air handling unit 1 as a second supply air stream 18 from a second outflow opening 19. In a variant, not shown, it can also be provided that the mixed air flow 17 is passed through the heat exchanger 4. In the present case, only the portion of the mixed air flow 17 formed by the further room air flow 16 passes through the heat exchanger 4.

The primary air flow 13 is guided from the outside 20 of a building wall 21 shown schematically in the ventilation unit 1. To generate the suction effect behind the ejector nozzle 14 is exclusively the pulse of the primary air flow 13. In this way, a very quiet, passive ventilation by means of the ventilation unit 1. The ventilation device according to FIG. 1 is designed as an underfloor ventilation device, which is expressed by the floor level 22 indicated in the beginning.

As can be seen from FIG. 2, the first outflow opening 10 of the fan temperature control module and the second outlet opening 19 of the induction temperature control module are arranged adjacent to one another on the upper side 23 of the ventilation device 1. The suction port 6 is covered by a ventilation grille 24.

In the embodiment of the ventilation device 1 shown in FIGS. 1 and 2, the heat exchanger 4 is arranged between the induction tempering module 12 and the ventilator temperature control module 11 provided above, both modules for temperature control of the first and the second supply air flow 9 and 18, respectively use the heat exchanger 4. An alternative embodiment is shown in Figs. 3, 4 and 5. As can be seen from the plan view according to FIG. 3, the ventilation device 1 has a fan temperature control module 11, adjacently thereto an induction temperature control module 12 and, adjacent thereto, another fan temperature control module 11 a arranged in series along a common heat exchanger 4 are arranged. In addition, the modules 11, 11 a and 12 are fluidly separated from each other. This can also be seen on the basis of the separate first outflow openings 10, 10a and the second outflow opening 19. The outflow direction is substantially perpendicular to a housing top 7, ie, approximately perpendicular to the plane.

As the cross-sectional view of FIG. 4 shows, a first room air flow 5 can be sucked with the fan 8 through the heat exchanger 4 in the ventilation unit 1 to be tempered there. After tempering, a first supply air flow 9 leaves the ventilation device 1 through the first outflow opening 10 into the room. A section through the induction Temperierungsmodul 12 shown in FIG. 3 along the line B-B is shown in Fig. 5. The inflow of a further air flow 16 takes place approximately in the same manner as in the fan Temperierungsmodul according to FIG. 4 by an-mammalian opening 6. The suction effect is, however, achieved by means of a primary air flow 13, which passes through the ejector nozzle 14 and thereby behind the Ejector nozzle 14 generates a negative pressure. As a result, the further room air flow 16 is passed through the heat exchanger 4 and tempered, after which it exits through a second outflow opening 19 after forming a mixed air flow 17 from the primary air flow 13 and the room air flow 16 as the second supply air 18 again from the ventilation unit 1.

To adjust the supply air flows 9 and 18, the speed of the fan 8 z. B. changeable via a control or regulating device and / or it may be provided in the device, not shown in the figures flaps. Regardless of the features described above, an essential aspect of the present invention is that in known solutions always a simple form of induction technology, such as direct induction, is used. The direct induction is simply a matter of a primary air volume flow entraining a certain and comparatively much smaller secondary air volume flow, for example substantially in that an air gap is provided between the convector and the primary air flow.

In contrast, in the present invention is a solution for the much more difficult task of the embodiment of a particular fan as an induction module in geometrically or cross-sectionally constructively identical shape or in a structurally largely identical space. Thus, the constructive framework conditions for the combination of a high-performance fan coil unit technology with a high-performance indirect induction technology implemented at the same time are described in the smallest possible space - as for a floor unit. This means that the induction module realized in a structurally largely identical space is always a realization of a secondary or indirect induction in which a primary air volume flow exiting through the air flow downstream through the convector and thus viewed from the convector generates a vacuum through which a room air or secondary air volume flow entering the convector from the convector is sucked through it. The indirectly induced secondary air volume flow is typically a multiple of the primary air volume flow. LIST OF REFERENCE NUMBERS

1 ventilation unit

2 housings

3 pipes

4 heat exchangers

5 first room air flow 6 intake opening

7 housing top

8 fans

9 first supply air flow 10, 10a first outflow opening 11, 11 a fan Temperierungsmodul

12 induction temperature control module

13 primary air flow

14 ejector nozzle

15 pipe section 16 further room air flow

17 mixed air flow

18 second supply air

19 second outflow opening

20 outside 21 building wall

22 floor level

23 top

24 ventilation grilles

25 lateral area of the heat exchanger

Claims

claims

1. Ventilation device with at least one heat exchanger or convector for temperature control of air, which is associated with at least one fan Temperierungsmodul the ventilation unit, wherein the fan Temperierungsmodul at least one fan for forcing a flow of sucked by at least one suction port of the ventilation device air in heat having with the heat exchanger or convector past this, characterized in that the ventilation device additionally has at least one operating according to the induction principle induction tempering.

2. Ventilation device according to claim 1, characterized in that the induction Temperierungsmodul is a passive module.

3. Ventilation device according to claim 1 or 2, characterized in that the fan-Temperierungsmodul associated heat exchanger or convector is used for temperature control by the induction Temperierungsmodul, wherein the Temperierungsmodulen particular sections of the heat exchanger or convector are assigned.

4. Ventilation device according to one of the preceding claims, characterized in that at least one further heat exchanger or convector is used for temperature control by the induction Temperierungsmodul.

5. Ventilation device according to one of the preceding claims, characterized in that at least one fan Temperierungsmodul and at least one induction Temperierungsmodul adjacent to each other, in particular special superimposed, are arranged and that each one longitudinal section is associated with at least one heat exchanger or convector.

6. Ventilation device according to claim 5, characterized in that the Temperierungsmodule are arranged in series along the heat exchanger or convector.

7. Ventilation device according to one of claims 1 to 4, characterized in that at least one fan Temperierungsmodul and at least one induction Temperierungsmodul adjacent to each other, in particular in series, are arranged and that each at least one lateral portion of at least one heat exchanger or convector is assigned ,

8. Ventilation device according to claim 7, characterized in that the heat exchanger or convector is arranged between fan temperature control module and induction temperature control module.

9. Ventilation device according to one of the preceding claims, characterized in that the Temperierungsmodulen are assigned separate outflow openings.

10. A method for air conditioning a room by means of a ventilation device with at least one heat exchanger or convector, wherein at least a first air stream is sucked with at least one fan and passed to the temperature control of the heat exchanger or convector and is delivered in a first supply air flow to the room, characterized in that a primary air stream is used to generate a suction effect in order to suck in at least one further room air stream and combine it with the primary air stream to form a mixed air stream, the primary air stream stream, the further room air flow and / or the mixed air flow for temperature control are passed to the at least one heat exchanger or convector or to a further heat exchanger or convector.

11. The method according to claim 10, characterized in that the air currents to be tempered at the same heat exchanger or convector, in particular on different sides, are passed.

12. The method according to claim 10 or 11, characterized in that the ratio of the first supply air flow and a second supply air flow formed by the mixed air flow in dependence on at least one environmental parameter is adjustable.

13. The method according to claim 12, characterized in that the generation of the first supply air flow and / or the second supply air flow is controlled depending on the time of day or season.

14. The method according to claim 12, characterized in that the generation of the first supply air flow and / or the second supply air flow is controlled as a function of the ambient noise level.