EP2376843A2

EP2376843A2 - Device for controlling the climate of a room with two independent fluid circuits

Info

Publication number: EP2376843A2
Application number: EP09778706A
Authority: EP
Inventors: Michael Hörner; Robert Böhm
Original assignee: Lindner AG
Current assignee: Lindner AG
Priority date: 2008-09-24
Filing date: 2009-09-24
Publication date: 2011-10-19
Also published as: WO2010034498A2; WO2010034498A3; DE202008012683U1

Abstract

The invention relates to devices for controlling the climate of a room, comprising a ceiling element that can be mounted on the room ceiling (R), said element having a room exchange surface (4) at the base thereof that is directed away from the room for the heat exchange with the room, and a ceiling exchange surface (7) configured at the top thereof for the heat exchange with the room ceiling, a lower line section (2) that is thermally coupled to the room exchange surface (4) for a heating or cooling fluid, and an upper line section (3) that is thermally coupled to the ceiling exchange surface (7), wherein the two line sections are configured as circuits (2, 3) that are independent of each other, and can be actuated separately from each other.

Description

Device for conditioning a room

The invention relates to a device for air conditioning a room according to the preamble of claim 1.

A device of this type is known from EP 1 862 742, in which in a ceiling element two line sections are arranged in series so that a first line section is thermally coupled to a space-facing space exchange surface and the second line section downstream of the first line section with a Deckenaus - Exchange surface is thermally coupled, which faces the ceiling. While in the operating phases of cooling the first line section and the second line section are flowed through in succession of cold water, in intermediate phases to allow a pre-cooling of the ceiling while avoiding hypothermia of the room by switching a three-way valve, the cold water through a, bypassing the first line section bypass line directly into the passed second line section, so that only the ceiling replacement surface is cooled. In this case, cold water flows first through the upper conduit section, which is thermally coupled to the ceiling replacement surface, and then through the lower conduit section back into the return.

In a known from EP 1 422 482 design with series-connected lower and upper line sections, one hopes for a larger temperature spread of the flow and the return temperature in the lower line section, which is thermally coupled to the space exchange surface when the volume flow of cold water at night reduced becomes. The problem is that the power consumption of a concrete ceiling per unit time at night is quite small and also the room temperature is only 3 to 4 K higher than the chilled water temperature, so that a hypothermia of the room can not be prevented with the result that following the Night operation requires heating of the room to compensate for hypothermia or the concrete ceiling can not be charged throughout the night. The invention has the object of providing an air conditioning device of the type described in such a way that their control can be better adapted to the requirements of the room air conditioning.

This object is achieved by the features in the characterizing part of claim 1. Characterized in that the upper and the lower line section are formed as separate circuits, for example, at night only the ceiling can be cooled, while no flow takes place through the lower circuit with thermal coupling to the space exchange surface. The fact that the two circuits are designed completely independent of each other, the two circuits can be operated independently of each other in different load ranges. This results in a better adaptation to the requirements of the room air conditioning.

The invention will be explained in more detail for example with reference to the drawing. Show it

1 is a schematic plan view of a ceiling module with separate circuits,

2 is a sectional view taken along the line I-I in Fig. 1,

3 is a sectional view taken along the line II-II in Fig. 1,

4 shows a perspective view of a corner part of the frame-shaped ventilation channel of the module,

5 shows a schematic circuit arrangement for explaining the control,

6 is a diagram illustrating the heating and cooling operation,

7 shows another arrangement of the controls,

Fig. 8 shows a further modification of the arrangement of the controls, and

Fig. 9 shows a modified embodiment in the region of the ventilation duct.

1 to 3 show a module 1 of a ceiling element, which, as shown in FIGS. 2 and 3, by means of retaining elements, such as retaining rails 1.1, is attached to a ceiling R, which is usually made of concrete. In the module 1 two independent circuits 2 and 3 are arranged, of which the lower circuit 2 is shown schematically by a lower loop and the upper circuit 3 by an upper power loop, which on one side of the module 1 respectively with a port 2.1 or 3.1 are provided, which are conveniently on a plane, as the view in Fig. 2 shows. The line loop of the lower circuit 2 is thermally coupled to a space exchange surface 4, in that line sections of this line loop are laid in plate-shaped heat-conducting profiles 5, which, on the one hand, produce a good heat-conducting contact with the line loop via profile projections 5a and, on the other hand, a good heat-conducting contact with the room exchange surface 4 via the plate surface. The line loop of the upper circuit 3 may also be routed to line sections in plate-shaped Wärmeleitprofilen that produce by Profilansätze 6 a good Wärmeleitkontakt on the one hand with the line loop and on the other hand, the ceiling R facing the ceiling replacement surface 7 of the module 1, by which heat by radiation and convection on the Room ceiling R is transferred. In Fig. 1 to 3, the profile projections 6a are arranged directly on the top of a ventilation duct 10, which forms the ceiling replacement surface 7.

Fig. 5 shows schematically the preferred control of the two separate circuits 2 and 3. The upper circuit 3 is connected by a feed line 31.1, in which a through valve 31 is disposed to the reproduced by a solid line central cold water supply line K (cold water supply). A return line 32 is represented by a dashed line, which leads from the circuit 3 to the central cold water return line. The lower circuit 2 is connected via a three-way valve 21 in a flow line 21.1 both to the flow line of a central hot water supply H via a line section 21.Ib and to the flow line of the central cold water supply K via a line section 21.1a. From the lower circuit 2, a return line 22.1 via a three-way valve 22 also via two line sections 22.1a and 22.1b leads to the return of the central hot water and cold water line H and K.

By this control of the two separate circuits 2 and 3, for example, in the night mode, the upper circuit 3 for cooling the ceiling R by opening the through-valve 31 are flowed through with cold water, while the lower circuit 2 is not flowed through by closing the valve 21 of cold water. This is shown in Fig. 6 by the position b, wherein in Fig. 6, the two valves 21 and 22 are shown as a unit, which are advantageously formed in a practical embodiment as a unit in the form of a six-way valve, so only one drive is required for the two valves 21 and 22.

For maximum cooling of the space, the two valves 21 and 22 can assume the position shown in FIG. 5, which corresponds to the position a in FIG. a constant transition between 100% and O% cooling is possible.

6 shows the maximum heating position of the two valves 21, 22 in the position c. The through-valve 31 is closed in the heating mode, so that no flow takes place in the upper circuit 3.

Fig. 7 shows a modified embodiment of the control of the two circuits 2 and 3 with three three-way valves, of which the valves 23 and 24 in turn advantageously form a unit as a six-way valve by switching them together according to the reproduced in Fig. 5 scheme become. The connected to the flow VL of the central hot water and cold water line H and K valve 23 is a three-way valve 25 downstream, which supplies the lower circuit 2 and the upper circuit 3 with cold water in the switching position shown in Fig. 7. The represented by a dashed line return RL from the two circuits 2 and 3 is merged and passed to the valve 24, which establishes the connection with the central return line H and K.

In this control, in a daytime switching, when the room temperature has a rising tendency and z. B. to a maximum temperature of 26 ° C, the unit of the valves 23, 24 in the reproduced in Fig. 7 position corresponding to the position a of FIG. 6, and the valve 25 in the in Fig. 7 reproduced position, so that 100% cooling is set.

If the room temperature has a decreasing tendency and moves from the maximum temperature of 26 ° C in the direction of the minimum temperature of z. B. 21 ° C, for example, the valve 25 can be brought into an intermediate position in which the lower circuit 2 is flowed through with about 50% of the volume flow and the upper circuit 3 with about 75%. This is usually sufficient to stop the falling temperature in the room. If this is not sufficient, the unit from the valves 23 and 24 can be throttled steadily, whereby the water volume flow through the lower circuit 2 is reduced faster than in the upper circuit 3, so that the ceiling R can be charged at this time with hardly reduced power , In the case of night service, the two valves 23, 24 assume the position a in FIG. 6, while the third three-way valve 25 is switched so that the cold water supply leads only to the upper circuit 3, but not to the lower circuit 2. In most cases, this does not overcool the room at night, if only the ceiling R is cooled. However, if a predetermined minimum room temperature, for example, 21 ° C at night, it may be provided by a connected to a temperature sensor program control to throttle the valves 23 and 24.

Fig. 8 shows a further modification of the control of the separate circuits 2 and 3, wherein instead of the three-way valve 25 in Fig. 7, a through valve 26 is provided in the flow line VL to the lower circuit 2. The switching positions of the valves 23 and 24 in turn correspond to those shown in Fig. 6. By closing the passage valve 26, the lower circuit 2 can be completely separated from the upper circuit 3, for example, when in the night mode only 'the upper circuit 3 is to cool the ceiling R.

The water volume flow through the through-valve 26 can be regulated as a function of the room temperature, while the upper circuit 3 takes cold water from the supply line VL without additional valve control. The lower circuit 2 can be controlled in this arrangement by the valve 26 always steadily, without this having a significant impact on the upper circuit 3.

In order to prevent undercooling of the space, a program for controlling the two unitized as a unit valves 23 and 24 are provided, after which the two valves 23, 24 close when a room temperature of, for example, 21 ° C is exceeded.

In a corresponding manner, a heating operation can be controlled, as shown in FIG. 6, wherein as in the cooling operation, a continuous change in the temperature control by continuous adjustment of the valves is possible.

A module 1 with the two separate circuits 2 and 3 can be designed in various ways. Preferably, the module 1 has the structure shown in FIGS. 1 to 3, in which a ventilation channel 10 closed in cross-section forms a frame of the module 1. This hollow frame is on the side of the line connections 2.1 and 3.1 of the lower and upper circuit 2 and 3 are provided with a connection opening 10.1, can be introduced through the air from a source not shown in the ventilation duct 10, which may be cooled or heated to a predetermined temperature. On the outer circumference of the frame-shaped ventilation duct 10 air outlet openings 11 are formed, which are directed upward in the illustrated embodiment, as indicated by arrows in Fig. 2 and reproduced in the plan view of FIG.

The cross-sectional shape of the ventilation duct 10 is expediently approximately rectangular and it has on the outer periphery on the side facing the room a web-shaped extension 10.2, on the upper side of the air outlet openings 1 1 are formed and their outer edge is pulled slightly upwards, so that the space exchange area 4 can be hung in the form of a sheet metal element with angled edges on this edge 10.3.

Fig. 4 shows a corner portion of the ventilation duct 10 in a view obliquely from above, on the upper side of the ventilation duct 10, two parallel line sections of the upper circuit 3 are laid in line receiving sections or profile lugs 6a, which is mounted directly on top of the ventilation duct 10 can be without a plate-shaped part is provided, as shown in Fig. 1 and 2 on the Wärmeleitprofilen 5.

The ventilation duct 10 is completely covered by the space exchange surface 4 from below, wherein the underside of the ventilation duct 10 preferably has a distance from the space exchange surface 4, so that, for example mineral wool or other heat insulating material and / or acoustically effective material between the ventilation duct 10 and space exchange surface 4 can be arranged , As a result, when cooling the ceiling R cold is directed upwards.

The air guiding frame 10 can be used to charge the concrete pavement by means of cooled air. This may be provided independently of the radiation cooling or as support for the radiation cooling, if the radiating surface should not be sufficient. For more targeted air guidance nozzles or baffles can be provided at the outlet openings of the air-guiding frame 10, which direct the air against the concrete ceiling. The space exchange surface 4 of the module 1 may be formed closed or perforated to form a sound absorbing element. Characterized in that the space exchange surface 4 extends to the outer edge of the module 1 and covers the ventilation duct 10 at a distance, the entire surface of the space exchange surface 4 sound absorbing formed or exploited as an acoustically effective surface.

The modular design of the air conditioning device has the advantage that, for example, a single module 1 attached to the ceiling and can be connected to the air and cold or hot water supply, so that the module 1 is functional without further action is required. Correspondingly, a module 1 can also be delivered prefabricated to the construction site, so that no further assembly work on the module 1 is required on the construction site. The individual functional modules 1 for a ceiling construction can thus be gradually assembled.

When installing the modules, when the ventilation duct 10 forming a frame is installed, the ventilation is ready for immediate use. If the room exchange area 4 should not be suspended in the frame of the module 1, the ceiling cooling can be taken immediately after connection of the circuit 3 in operation. After hanging the space exchange surface 4 on the frame of the module 1 and the room cooling can use as soon as the lower circuit 2 is connected.

If the space exchange surfaces 4 removed and z. B. retrofitted at the factory, for example by several heat conduction. and / or other acoustic insulation mats, the ventilation and cooling functions of the room ceiling can continue to operate during the changeover time. Accordingly, it is also possible to operate a module 1 without space exchange surface 4 for ventilating and cooling the ceiling. A basic cooling capacity can be provided by the circuit 3 laid on the upper side of the ventilation duct in conjunction with cold air in the ventilation duct 10, without the space exchange surface 4 being suspended from this structure.

An advantage of the described design is that the ventilation duct 10 is completely separate from the heating and cooling function, so that ventilation on the one hand and heating / cooling on the other hand can be operated completely independently of each other. Due to the lack of the separate circuits 2 and 3 are provided by hot water in the lower circuit 2 a heating power, while a heating of the ceiling can be omitted.

The modular design according to the present invention relates not only to the design of a single module, but also to its modular design, because the individual functions can be operated independently, for example, ventilation and / or cooling. This modular operation is also supported by independent circuits 2 and 3.

The modular operation of a module 1 also has the advantage that in a ceiling constructed of a plurality of modules 1, individual sections of the ceiling can be operated in a different way than another section of the ceiling, for example by being exposed to sunlight the cooling capacity is increased in the room compared to a shaded section. In this case, depending on a temperature sensor, the modules can be controlled in sections.

There are various modifications of the described design possible. Thus, the routing of the lower circuit 2 and / or the upper circuit 3 can be formed depending on the dimensions of the module and the air duct 10 in turns or in parallel strands. Furthermore, the Wärmeleitprofϊle 5 may have a different than the illustrated plate shape with a U-shaped receptacle 5 a and 6 a for the line sections.

The ceiling replacement surface 7 may be made larger than the embodiment shown in FIGS. 2 and 3 by extending the top of the ventilation duct 10 towards the inside of the module so that the ducts of the upper circuit 3 are also located on this area of the ceiling replacement surface 7 can be.

An embodiment is also possible in which the frame, which is represented in FIGS. 1 to 4 by the ventilation channel 10, is formed by a downwardly open U-shaped cross-section. In such an embodiment, the underside of the ventilation duct 10 can be formed by the space exchange surface 4, which is suspended so that it covers the downwardly open U-section of the frame on the underside. Furthermore, it is possible to design a module 1 such that only the functions heating and cooling are fulfilled. In such an embodiment, the frame may be formed in cross-section by a downwardly open U, wherein at a distance from the lower open side of this U-shaped frame, the space exchange surface 4 is arranged. A ventilation duct is not provided in such a design.

On the inside of the space exchange surface 4 mineral wool or other heat insulating and / or acoustically effective material can be arranged.

The module 1 is expediently mounted close to the ceiling R, preferably at a distance of 10 to 20 mm between the underside of the ceiling and top of the overhead in the illustrated embodiment line loop 3, wherein the heat transfer by radiation and convection between the ceiling exchange surface 7 and circulation 3 and ceiling R takes place ..

It is also possible to make individual modules 1 hinged in a built-up of several modules 1 heating and cooling ceiling.

The brackets 1.1 of a single module 1 can be suitably formed adjustable in height to compensate for building tolerances.

The modules 1 can be designed in visually appealing form, with each module fulfilling the functions of heating, cooling and ventilation. Instead of an air supply to the ventilation duct 10 and an air extraction via the connection opening 10.1 of the ventilation duct can be made.

Due to the frame-shaped construction of a module 1, a lighting element can be integrated within a module 1 in a simple manner.

Furthermore, in particular in the ventilation duct 10, a cable duct can be integrated, can be routed through the cable to other facilities. The ventilation duct is expediently designed as an aluminum extruded profile. Various arrangements of ventilation openings on the ventilation duct 10 are also possible. The ventilation duct 10 may have a rectangular cross-section, wherein 7 air outlet openings may be formed on the top, ie on the ceiling replacement surface.

It is also possible to provide 10 air outlet openings on the underside of the ventilation duct.

In particular, it is also possible to separate the space below the ventilation duct 10 with respect to the interior of the module and the. Room exchange area 4 to be provided in this area 4a with air outlet openings, as shown in FIG. 9 as an example. In this case, instead of the underside, air outlet openings may be formed laterally on the upwardly angled edge of the space exchange surface 4a.

The emission surface, in particular of the space exchange surface 4, can be coated with a heat-absorbing lacquer which improves the heat exchange. Likewise, it is also possible to apply a corresponding heat-absorbing paint on the concrete surface above the module.

Instead of the described three- or six-way valves, other control elements for the fluid flow can be provided which allow a constant change in the volume flow.

The described air conditioning device can be used not only as a ceiling element, but also as a wall element.

Claims

claims

A device for air conditioning a room, comprising a ceiling element (R) mountable ceiling element with a directed at its bottom against the room space exchange surface (4) for heat exchange with the room and formed on its top cover exchange surface (7) for the heat exchange with the ceiling, a lower, with the space exchange surface (4) thermally coupled line section (2) for a heating or cooling fluid and an upper, with the ceiling replacement surface (7) thermally coupled line section (3), characterized in that the two line sections as independent circuits (2, 3) are formed and can be controlled separately from each other.

2. Device according to claim 1, wherein the upper circuit (3) only with a cold water supply (K) and the lower circuit (2) with the cold water and a hot water supply (K, H) is connected.

3. Device according to claim 2, wherein the upper circuit (3) via a flow line (31.1) with a central Vorlaufl'eitung (K) for cold water, in which a flow valve (31) is arranged, and via a return line (32) a central return line for cold water is connected, while the lower circuit (2) via a flow line (21.1) and a return line (22.1) both to a central hot water supply and cold water supply line and to the return lines (K, H) is connected, wherein in the with the lower circuit (2) connected to the supply and return lines (21.1 and 22.1) each have a valve (21 or 22) is arranged, can be switched by a cooling operation to a heating operation and vice versa.

4. Device according to claim 1, wherein both the upper circuit (3) and the lower circuit (2) in each case to a cold water and to a hot water supply (K, H) is connected.

5. Device according to claim 4, ^' wherein both the lower circuit (2) and the upper circuit (3) via a flow and a return line to a central heating and cooling line is connected, in each of which a switching valve (23, 24 ) is arranged for switching between heating and cooling, and wherein in the flow line to the lower circuit (2) the switching valve (23) downstream of another switching valve (25) is arranged, through which the flow line to the two circuits (2, 3) separable or throttled.

6. Device according to claim 4, wherein both the lower circuit (2) and the upper circuit (3) via a flow line and a return line to a central heating and cooling line is connected, in each of which a switching valve (23, 24). is arranged for switching between heating and cooling, and wherein in the leading to the lower circuit (2) flow line downstream of the switching valve (23) a through valve (26) is arranged, through which the flow line to the lower circuit (2) can be shut off while the Supply line to the upper circuit (3) is open.

7. Device according to one of the preceding claims, wherein the ceiling element has a frame with an approximately U-shaped cross section, which is open at the bottom, and on the frame, the space exchange surface (4) is mounted.

8. Device according to claim 7, wherein the frame is formed as a closed in cross-section ventilation duct (10) having a connection opening (10.1) to a central air supply and on the circumference with air outlet openings (1 1) or air intake openings is provided.

9. Device according to claim 7 or 8, wherein the upper circuit (3) with the ventilation duct (10) or with the U-shaped frame is thermally coupled by the circuit (3) on the upper side of the ventilation duct (10) or the frame is moved.

10. Device according to one of claims 7 to 9, wherein the space exchange surface (4) extends over the entire surface of the module (1) and covers the ventilation duct (10) or the frame on the room side.

11. The device according to claim 10, wherein the space exchange surface (4) is arranged at a distance from the underside of the ventilation channel (10) or of the frame.

12. Device according to one of claims 8 to 11, wherein the ventilation channel (10) has a substantially rectangular cross-sectional shape with a web-shaped extension (10.2) on the outer circumference, in which the air outlet openings (11) are directed upwards.

13. Device according to claim 11, wherein on the outer circumference of the extension (10.2) an upwardly projecting edge (10.3) for mounting the space exchange surface (4) is formed.

14. A device for air conditioning a room, comprising a on a ceiling (R) mountable ceiling element having a through a ventilation duct (10) formed frame on the peripheral surface Luftansaugbzw. Air outlet openings (11) are formed, wherein on the ceiling (R) facing the top of the ventilation duct (10) a circuit (3) for a heating or Kühlfiuid is laid.