EP3479030A1

EP3479030A1 - Device for temperature control of residences

Info

Publication number: EP3479030A1
Application number: EP17820650.4A
Authority: EP
Inventors: Göran Hultmark
Original assignee: Lindab AB
Current assignee: Lindab AB
Priority date: 2016-06-30
Filing date: 2017-06-27
Publication date: 2019-05-08
Also published as: WO2018004432A1; SE542502C2; SE1650956A1; EP3479030A4

Abstract

The present invention relates to a plenum box (10) for ventilation of the air in one or several rooms (6). The plenum box comprises one supply air inlet (13) for supply of supply air and at least two supply air outlets (14), for letting out supply air into the room. The respective supply air outlets (14) are arranged to be connected to the room (6), in terms of airflow. The plenum box comprises at least one heating/cooling battery (15) for heating and/or cooling of the supply air for the room.

Description

Device and method for temperature control of residences

TECHNICAL AREA

The present invention relates to ventilation and tempering of supply air for residences, properties and other buildings.

BACKGROUND

The need for housing is expected to increase in the future, while the demands on low energy losses for housing are increasing. There is both an environmental and a cost benefit in trying to supply as little energy as possible when heating houses. This means that the heating requirement for housing will be decreasing more and more in the future. One specific example of this decreasing demand for energy for heating of housing are so-called low energy houses, which use very low amounts of energy even on the coldest winter's day. The houses are well insulated and heated largely passively, i.e. with the help of e.g. solar insolation, home appliances and people in the rooms. Nevertheless, additional energy from a heating source needs often to be added. Low energy houses are usually heated with airborne heat. It is also common to use water-borne radiators or underfloor heating.

Furthermore, air ventilation is required in housing, and accordingly ventilation systems are common in buildings, especially in spaces such as bedrooms and bathrooms, and often comprise a ventilation duct, at either end of which a fan is often connected. One or more ventilators/dampers are arranged at the other end. One or more dampers and plenum boxes are arranged in the ventilation duct and ventilation system, to control the airflow at different positions along the ventilation duct. The ventilation duct often extends over several different spaces in the property, to provide ventilation of these spaces.

The damper is often adjustable in the ventilation duct and provides an adjustable airflow opening in conjunction with the ventilation duct, with which airflow through/past the damper, and through and between the ventilation duct and the outside space, usually one or more rooms, can be controlled. When the damper is connected to the ventilation duct, airflow into or out of the ventilation duct can be adjusted by changing the airflow opening size by adjusting the damper position in the ventilation duct. In case the air supplied is too cold, the air supplied can be heated in the room, for example using a water-borne radiator or underfloor heating that adds heat to the air in the room.

Prior art dampers are often also realized using complex technical solutions requiring stable and sufficiently controlling suspension and drive devices. SUMMARY OF THE INVENTION

One objective of the invention is to provide a plenum/distribution box, which solves or at least reduces the above-mentioned problems.

The above objective is achieved with the help of a plenum/mixing/distribution box according to the related independent claim, with preferred versions defined in the related subordinated claims.

The plenum box in accordance with the invention is for ventilation of the air in at least two rooms. The plenum box in accordance with the invention is intended for ventilation of air and tempering/temperature regulation of the same in at least two, i.e. two or more rooms.

One embodiment of the invention relates to a plenum box for ventilation and tempering of the air in at least two rooms. The plenum box comprises at least one air inlet for supply of air, at least two outlets for discharge of supply air, wherein the respective outlet for supply air is arranged to be fluidically connected to a room, in terms of airflow. Furthermore, the plenum box comprises at least one heating/cooling battery for heating and/or cooling of the supply air and at least one first and one second air duct. The first and second air ducts have a duct inlet at a first end and a duct outlet at a second end, and the duct inlets are connected, in terms of airflow, to the supply air inlet and the duct outlets are connected, in terms of airflow, to the at least two supply air outlets. Furthermore, the heating-/cooling battery is arranged in the first air duct. The advantage with the above/below plenum box is that ventilation and tempering of supply air for two or more rooms is realised in a cheap, simple, less bulky and efficient manner. Furthermore, an individual temperature regulation of two or more rooms is achieved with the help of only one battery with the same advantages, set out above.

In one aspect of the plenum box according to the above embodiment, the plenum box comprises at least two dampers, each damper being adapted to control the size of the duct outlets of the air duct to control the supply air temperature in the outlet for supply air. The advantage of at least two dampers in the above plenum box is that the ventilation and the temperature regulation of supply air for two or more rooms is realised using a simple and cheap construction.

In another aspect of the plenum box according to the above embodiment, the respective damper is placed in an outlet for supply air. The advantage of one damper in each outlet for supply air in the above plenum box is that the ventilation and the temperature regulation of supply air for a room is realised using a simple and cheap construction.

In another aspect of the plenum box according to any of the above embodiments, the damper is a rotative/swivel damper. The advantage of one or more dampers in the form of swivel dampers in the above plenum box, is that the ventilation and the temperature regulation of supply air for two or more rooms is realised using a simple and cheap construction. Another advantage of the plenum box according to one of the above/below embodiments, where a swivel damper is used, is that such a plenum box becomes more compact than if e.g. a slide damper is used, i.e. it takes up less space and is less bulky. One advantage of the plenum box according to one of the above embodiments, where the damper(s) is a swivel damper, is that such a damper construction is more compact than e.g. a slide damper, and takes up less space and is less bulky, so that the plenum box's inner and/or outer volume/measurements may also be reduced, i.e. the building height and/or the building length and/or the building width may be reduced. Another advantage of the plenum box according to any of the above/below embodiments, with at least one swivel damper, is that a faster change in temperature of the air treated and led past the damper(s) is achieved. Another advantage of the plenum box according to any of the above/below embodiments, with at least one swivel damper, is that this type of damper provides an opportunity to regulate the airflow in a linear manner, so that a more controllable and exact air flow regulation is achieved. Another advantage of the plenum box according to any of the above/below embodiments, with at least one swivel damper, is that this type of damper does not require such a stable guiding for its movement compared with a slide damper, in particular a disc slide damper.

Another aspect of the plenum box according to any of the above embodiments relates to the fact that the damper comprises a plate. The advantage of a damper comprising a plate in the above plenum box is that the ventilation and the temperature regulation of supply air for two or more rooms is realised using a simple and cheap construction.

In a further aspect of the plenum box of the above embodiment, the plate is angled to a V- shape with an angle of 20-150°, preferably 50-120° and more preferably 80-100°. The plate's V-shape is defined based on its cross-section, i.e. its cross-section is V-shaped. The plate's V- shape is visible when the plate is seen from one end or side in its longitudinal direction. The V- shape of the plate is defined by having two shanks with an angle in between, which may be blunt or pointed. The plate's V-shape may also be defined as a basically/nearly L-shaped part, i.e. with two shanks, angled approximately or near or almost exactly 90^° relative to each other. An angled plate of the damper has the advantage that the pressure drop becomes lower in the system/air supply device, as the damper may thus impact the airflow in both air ducts. The plate that is angled provides a "softer" and not so sharp transition from the duct outlet to the outlet for supply air.

In one aspect of the plenum box according to any of the above embodiments, the respective dampers are arranged to control the size of the first and second air duct's channel outlet between a first and a second position. In the first position, the channel outlet of the first air duct is open and the channel outlet of the second duct is completely closed, and in the second position the channel outlet of the first duct is completely closed and the channel outlet of the second duct is open. A damper that is adjustable in this way has the advantage that the pressure drop becomes lower in the system/air supply device, as the damper may thus impact the airflow in both air ducts. The plate that is angled achieves a "softer" and no so sharp transition from channel outlet to outlet for supply air at an open position, i.e. this achieves, in a closed position, "free blow" for the air duct which is open.

One aspect of the plenum box according to any of the above embodiments means that the respective damper is controllable by providing an adjustable airflow opening, with which the airflow through either or both of the air ducts and further to the room may be controlled. An airflow opening which is adjustable in this way has the advantage that the pressure drop becomes lower in the system/air supply device, as the damper can thus impact the airflow in both air ducts. This contributes to a "softer" and no so sharp transition from channel outlet to outlet for supply air at an open position, i.e. this achieves, in a closed position, "free blow" for the air duct which is open.

Another aspect of the plenum box according to any of the above embodiments means that the plenum box comprises a second heating/cooling battery, wherein the second heating/cooling battery is arranged in the second air duct. A second heating/cooling battery has the advantage that it provides control/regulation of a larger temperature range/interval when tempering the supply air.

According to another aspect of the plenum box according to any of the above embodiments, one heating/cooling battery is a heating battery and the other heating/cooling battery is a cooling battery. One heating battery and one cooling battery entails the advantage that it provides control/regulation of a larger temperature range/interval when tempering the supply air.

In another aspect of the plenum box according to any of the above embodiments said heating/cooling battery comprises at least two separate sections/zones. A heating/cooling battery with two or more separate sections/zones entails the advantage that it facilitates control/regulation of a larger temperature range/interval when tempering the supply air.

In another aspect of the plenum box according to above embodiments the at least two separate sections/zones are equally large. A heating/cooling battery with sections/zones which are of equal size have the advantage of simplifying control/regulation of the

temperature range/interval when tempering the supply air.

In one aspect of the plenum box according to any of the above embodiments the air ducts are connected in parallel. Connecting the air ducts in parallel results in the advantage of regulating a larger temperature range/interval when tempering the supply air, since it is possible to adapt/optimise the size of the heating/cooling battery. According to one aspect of the plenum box according to any of the above embodiments, the air ducts are separated in an air-tight manner by a separation. Separating the air ducts in an air-tight manner results in the advantage that the tempering of the supply air is carried out more accurately, without air leakage. According to one aspect of the plenum box according to the above embodiment, the separation is arranged to extend form a first position in line with the heating/cooling battery's air inlet and to a second position in line with the air outlet of the plenum box, seen in the direction of the airflow. Separating the air ducts from the air inlet of the heating/cooling battery results in the advantage of regulating a larger temperature range/interval when tempering the supply air, but also regulating it more accurately since it is possible to adapt/optimise the size of the heating/cooling battery.

In accordance with another aspect of the plenum box according to any of the above embodiments the separation is placed in the middle of the plenum box and divides the plenum box in such a manner that the two air ducts are of equal length. Achieving two air ducts with equal length results in the advantage of regulating a larger temperature

range/interval when tempering the supply air, but also regulating it more accurately since it is possible to adapt/optimise the length and thus the size of the heating/cooling battery.

According to still another aspect of the plenum box according to any of the above embo- diments the damper is mounted on the separation. The advantage of at a damper mounted on the separation is that the ventilation and the tempering of supply air for two or more rooms is realised using an uncomplicated and cheap construction.

According to yet another aspect of the plenum box according to any of the above embodiments the respective outlet for supply air, for letting out supply air, is arranged in front of different parts/sections/zones of the heating/cooling battery. A heating/cooling battery arranged in front of two or more air outlets located individually in front of each

heating/cooling battery section/zone has the advantage of enabling control of a more accurate and larger temperature range/interval when tempering supply air in individual rooms. In accordance with another further aspect of the plenum box according to any of the above embodiments the first and the second air duct is formed by the separation and the encapsulation of the plenum box. The advantage of achieving separate air ducts via a common separation inside the plenum box is that the plenum box becomes a simple and cheap construction. DESCRIPTION OF FIGURES

The invention will be described in more detail below with reference to the accompanying schematic figures, which by way of example illustrate presently preferred embodiments of the invention.

Figure 1A schematically shows a cross-sectional side view of a plenum box in a mode of operation according to an embodiment of the invention.

Figure IB schematically shows a cross-sectional side view of the plenum box in Figure 1A, in another mode of operation than in Figure 1A, according to an embodiment of the invention. Figure 1C schematically shows a cross-sectional side view of the plenum box in Figures 1A and IB, in another mode of operation than in Figures 1A and IB, comprising another design of a damper according to an embodiment of the invention.

Figure 2A schematically shows a cross-sectional top view of the plenum box in Figures 1A-C according to an embodiment of the invention. Figure 2B schematically shows a corresponding cross-sectional side view of the plenum box as in Figures 1A-C according to an embodiment of the invention.

Figure 2C schematically shows a corresponding cross-sectional top view of a plenum box comprising separate sections/zones according to an embodiment of the invention.

Figure 3A schematically shows a cross-sectional side view of a plenum box in a mode of operation according to an embodiment of the invention.

Figure 3B schematically shows a side view of the plenum box in Figure 3A, in another mode of operation, according to an embodiment of the invention.

Figure 3C schematically shows a side view of the outside of the plenum box in Figures 3A and 3B, in another mode of operation, according to an embodiment of the invention. DESCRIPTION OF EMBODIMENTS

The need for housing is expected to rise in the future. At the same time, the demand for low/lower energy losses for homes increases, which means that the heating requirement in a residence decreases, allowing combined ventilation and heating systems instead of separate ones. Furthermore, there is also a cooling need for housing, but also for workplaces, i.e.

offices, at least during hot seasons, and future forecasts also indicate scenarios of increasing temperatures locally, which means an increased demand for the cooling of supply air for homes, but also for offices.

The supply air device in Figs. 1A to 3C is intended to ventilate and regulate the temperature of at least two rooms 6, i.e. two or more rooms 6. The supply air device comprises a ventilation duct 1, a fan 2, and a plenum box 10 according to the invention, with at least one inlet opening or supply air inlet 13 for supply of air and at least two supply air outlets 14, for letting out supply air, and a casing 11. The displayed supply air device is adapted to be fitted at/in a ceiling, e.g. a false ceiling, alternatively in a ceiling or attic spaces/narrow spaces, for example when renovating existing buildings that have limited space. The supply air device, i.e. the plenum box according to the invention, is not intended to change the size of the airflow between the supply air inlet 13 and the supply air outlet 14, but is intended to primarily temper the air to the various supply air outlets in different ways.

Figs. 1A-2C shows how the fan 2 presses air into the plenum box 10 according to the invention, via its supply air inlet 13, from the side of the plenum box's casing 11. The inlet opening 13 may be arranged on the long and/or short side of the plenum box casing 11. Figs.

3A-3C show how air is pressed into the plenum box 10 according to the invention via its supply air inlet 13 from the top and into the casing 11 of the plenum box (in these Figs. 3A-3C the air could also be pressed into the plenum box casing 11 from the bottom, i.e. from below). Figs. 3A-3C show that the air is pressed into the plenum box 10 via its supply air inlet 13, which is located substantially perpendicular or perpendicular to the location of the inlet opening 13 in

Figs. 1A-1C and 2B.

The plenum box 10 is equipped, according to one embodiment of the invention, with two inlet openings 13 (not displayed). This embodiment has a first supply air inlet 13 located as illustrated in Figs. 1A-1C and 2B and a second supply air inlet 13 located as illustrated in Figs. 3A-3C. This embodiment entails that the two inlet openings 13 extend/are oriented at approximately or exactly 90° to each other, i.e. mainly perpendicularly or nearly perpendicularly or at a perpendicular angle in relation to each other. In other embodiments which are not illustrated, the two inlet openings 13 may be arranged at other angles in relation to each other, e.g. 45° instead of 90° or at some angle in between, and/or connected to other sides of the plenum box 10 than those displayed, e.g. to the bottom side in Figures 3A-3C instead of the top side, and/or at the left side in Figs. 1A-2C instead of at the plenum box's right side.

Figs. 1A-1C and 2A-2C show the supply air device with its plenum box 10 according to the invention in a cross-section. The air flows into the air supply device and its plenum box 10 via the air supply opening 13 after the ventilation duct 1, as the top hollow arrow on the right side in Figs. 1A and IB shows. The plenum box 10 according to the invention comprises at least one first and one second air duct 17, 18. Incoming airflow is illustrated with two hollow arrows in Figs. 1C and 2B, which arrows extend from the ventilation duct 1 displayed on the right side, and then each turn into an air duct 17, 18 in the plenum box 10, 11 according to the invention. This takes place when the damper 16 is open. The air ducts 17 and 18 are two separated air ducts, each with an inlet channel 17A and 18A. The first and the second air duct 17, 18 has an inlet channel 17A, 18A at a first end and an outlet channel 17B, 18B at a second end. The inlet channels 17A, 18A are connected to the supply air inlet 13 in terms of airflow. The outlet channels 17B, 18B are connected to the at least two supply air outlets 14 in terms of airflow. The heating/cooling battery 15 is arranged in the first air duct 17. The inlets of the air ducts 17A, 18A are located immediately after, i.e. downstream of the supply air inlet 13 for receipt and supply of supply air in the plenum box 10. The plenum box 10 comprises at least two supply air outlets 14, for letting out supply air. Each supply air outlet 14 is connected, in terms of airflow, to at least one room 6. The respective supply air outlets 14 are arranged to be connected to a room 6, in terms of airflow. The air ducts relate to at least one first 17 and one second air duct 18. The first and the second air duct 17, 18 has an inlet channel 17A, 18A at a first end. The first and the second air duct 17, 18 has an outlet channel 17B, 18B at a second end. The inlet channels 17A, 18A are connected to the supply air inlet 13 in terms of airflow. The outlet channels 17B, 18B are connected to the at least two supply air outlets 14 in terms of airflow. The plenum box 10 according to the invention comprises at least one

heating/cooling battery 15 for heating and/or cooling of the supply air. In one embodiment one or more heating/cooling batteries 15 are arranged in the first air duct 17. In another embodiment one or more heating/cooling batteries 15 are arranged in the second air duct 18.

Fig. 2C shows the plenum box 10, 11 in a cross-section from the top and incoming airflow is illustrated with three black arrows extending through the air inlet 13 (corresponding to air from the ventilation duct 1 and the fan 2 illustrated on the right hand) and into the plenum box 10, 11 through its four different sections I, II, II I, IV (see also Figs. 2A and 2B). The four different sections and/or zones I, II, III, IV are illustrated to clarify that the air may be in different conditions/change conditions in different parts of the plenum box 10, 11 on its way through the same. This is a result of e.g. the air being led through the section(s) I (where losses may cool the air) and further to the section(s) II (where at least one heating or cooling battery 15 may be located for heating or cooling of the air passing through any of the sections II), following which the air is led further along to the sections III (where losses may cool the air somewhat again) and further out through the air outlet(s) 14 in the plenum box 10, 11 and further to room 6 (see Figs. 1A-1C). At or after the air outlet 14, the pressure may e.g. increase again with additional fans (see Figs. 2A-2C).

The heating/cooling battery 15 extends over several supply air outlets 14. The air outlets 14 are arranged in front of the heating/cooling battery 15. When the heating/cooling battery 15 has an extension sideways as illustrated in Figs. 2A-2C, the air outlets 14 are also located next to each other in the lateral direction. In this way, different supply air outlets 14 are arranged at different parts of the heating/cooling battery 15. The air outlets 14 are located, in terms of airflow, downstream of the heating/cooling battery 15. The heating/cooling battery has the same temperature setting throughout its circuit, which means the supply air passing through the heating/cooling battery 15 and into different air outlets is heated/cooled by the same heating/cooling battery 15. The location of the air outlets 14 in this manner in relation to the heating/cooling battery 15 creates a pressure drop in the lateral direction in the air flowing through the plenum box 10, which entails that the larger part of the air passes through the heating/cooling battery 15 right in front of the air outlets. Thus, the air flows in different zones in front of the different air outlets in such a manner that the air flow is at its greatest at each supply air outlet 14. The air flow achieved may be likened to there being a separate plenum box at each supply air outlet 14, even though it is a common heating/cooling battery 15. The location of the air outlets 14 in relation to the heating/cooling battery 15 thus entails a function that a heating/cooling battery 15 may regulate the temperature of the air to several different air outlets 14, in a manner that is similar to there being one or more separate heating/cooling batteries 15 in front of the respective supply air outlet 14, and/or functioning exactly as though there had been one or several separate/individual heating/cooling batteries 15 in front of the respective supply air outlets 14. Each battery 15 corresponds, in other words, to one unit with virtual sections or zones II. These virtual sections II are illustrated with dashed lines in Figure 2A to clarify that these "small" and/or "proprietary" heating/cooling battery sections II do not need to be physically separate as illustrated in Figure 2C, but may also only be defined in Figure 2A as different virtual parts/surfaces of the battery 15 in a lateral direction. The air outlets 14 are thus also arranged, i.e. located in front of different parts/surfaces of the battery 15, mainly corresponding to the virtual and functionally

"distinct"/separate impacting sections II and/or the physically distinct sections II. The battery 15 may in one aspect comprise a combination of at least one or several virtual sections II and/or one or several physically distinct sections II, which sections are thus separate, i.e. their "air environment" and air treatment effect are different and differ from each other in accordance with the invention, even if they are not de facto physically separated but may be so.

The plenum box 10 has an encapsulation 11 that defines an internal distribution chamber 12. The air flows into a first part or section or zone I of the chamber 12 for further air distribution. The air flows into the chamber 12 past the first section I, and flows into a second part or section/zone II or several other parts/sections/zones II where at least one cooling/heating battery 15 is arranged. At least one part/section/zone II or each part/section/zone II of the plenum box 10 comprises a heating/cooling battery 15. The air is heated or cooled down in one or several of these sections/zones II before it is led further to and past a third

part/section/zone III of the plenum box 10, 11. Subsequently, the air is led out through at least two air outlets or air supply devices 14 in the plenum box 10, 11 and past a fourth part/section or several sections IV (the supply air outlet 14 is a part of the fourth section IV) out into one or several rooms 6 via a ventilation channel 1 or without one, i.e. in an embodiment with e.g. a supply air device located directly above the supply air outlet 14 on the external encapsulation 11 of the plenum box. As is illustrated in the embodiment with one supply air outlet 14 per room in Figure 2C and in the embodiment with at least two supply air outlets 14 out from the plenum box in each direction in Figures 3A-3C.

In the plenum box 10 according to the invention, the air ducts 17, 18 are separated in an air tight manner. This is achieved with a separation 19 arranged to extend from a first position in line with the heating/cooling battery's 15 inlet 15A and to a second position in line with the plenum box's supply air outlet 14, seen in the direction of the airflow. In one embodiment, the air-tight separation 19 is located in the middle of the plenum box 10 and divides the plenum box into two internal, air-tight distribution chambers 12. These chambers 12 may be of equal or different size. In another embodiment, the air-tight separation 19 is located in the middle of the plenum box 10 and divides the plenum box in such a way that the two air ducts 17, 18 are of equal size or different size. The two air ducts 17, 18 are defined by the external encapsulation 11 of the plenum box and the separation 19. This means that each air duct 17 or 18 has an outside that corresponds to a part of the envelope surface of the plenum box's encapsulation 11 and an inside defined by the separation 19. This internal separation 19 has two sides, of which one side faces and constitutes the inside of the first air duct 17, and the other side of the separation 19 faces and constitutes the inside of the second air duct 18. The separation 19 is a separation of the two air ducts 17, 18 which is joint to both ducts. In accordance with the invention, this relates to a plenum box 10, 11 illustrated in Figures 1A to 3C. In one aspect, the separation 19 comprises an opening or a hole 19A illustrated with an arrow in Figures 3A-3C. This opening 19A leads incoming air, illustrated with a hollow, upper downward-pointing arrow in the figures, into the first air duct 17 if the supply air must be heated or chilled. In this aspect of the plenum box 10, illustrated in Figures 3A-3C, it comprises two heating/cooling batteries, i.e. one battery 15 on the right side and one battery 15 on the left side in the plenum box. The need for two batteries 15 in the plenum box 10 according to the Figures 3A- 3C arises because of the supply air deflecting both to the right and left in the box 10, and the two air flows exit through their respective supply air outlets 14 (see horizontal and hollow arrows), and if the respective airflow is to be heated or chilled, one battery 15 is needed per the left and the right part of the air duct 17.

The plenum box 10 may be a so-called distribution box. The distribution box 10 comprises at least one heating or cooling battery 15 or both. Each heating/cooling battery 15 may be arranged to occupy about half the inside dimensions, e.g. half the volume, width, height or length, of the distribution box 10.

The plenum box 10 according to the invention comprises at least two or more supply air outlets 14. One airflow and/or temperature controlled adjustable damper 16 is arranged in each outlet 14 according to one embodiment. The damper 16 according to the invention is arranged, in one embodiment, like a bent swivel/rotative damper made of metal sheet. Each supply air outlet 14 from the plenum box 10 according to the invention is intended to ventilate at least one room 6. The plenum box according to the invention has an supply air outlet 14 to each room 6 and is operative, i.e. connected in terms of regulation, to at least one of the rooms for detection and regulation of its climate, e.g. temperature. The plenum box 10 according to one embodiment comprises at least two dampers 16. Each/the respective damper is arranged to regulate the size of the channel outlets 17B, 18B of the air duct 17, 18 to control the temperature of the supply air in the supply air outlet 14. Each/the respective damper 16 is located in an supply air outlet 14. One advantage of one or several bent swivel/rotatable dampers 16 made of metal sheet is that a faster temperature change of the air for treatment is achieved. Another advantage of one or several bent swivel/rotatable dampers 16 made of metal sheet is that a linear air flow control is achieved. Furthermore, one advantage with bent metal sheet swivel/rotatable dampers 16 is that the tip/bottom outside of the same may be directed/point towards the airflow. This means the airflow hits the out- side of the top/tip/bend on the swivel/rotatable damper 16, so that the damper's air resistance is minimised, i.e. its catch of air is lower, in the direction of the airflow. The damper 16 may thus be defined as arrow-shaped viewed laterally/in its longitudinal direction/cross- section, with the arrowhead directed towards the arriving airflow. The damper's "arrow- shape" may be more or less pointed, but also somewhat rounded, or more or less blunt depending on the enlargement in which the damper 16 is viewed and the intended

application.

The swivel/rotatable damper 16 according to the invention determines how much of the air that must pass through the heating/cooling battery 15 and thus be heated/cooled, and how much of the air that must pass by the side of the battery, i.e. by-pass it. The control of the damper 16 takes place in response to the heating and/or cooling requirement of the respective room 6, as described in more detail below. According to one aspect, the damper 16 is a swivel/rotatable damper. According to one aspect, the swivel/rotatable damper 16 has a plate with a shape that corresponds to the shape of the channel outlets 17B, 18B in the air ducts 17, 18. In another aspect, the swivel/rotatable damper 16 has a plate with a shape that corresponds to the shape of the channel inlets 17A, 18A in the air ducts 17, 18, if the damper is instead located upstream of the battery 15 viewed in the direction of the airflow. To control the supply air temperature between a maximum and a minimum position, the swivel/rotatable damper is turned 180°. The swivel/rotatable damper

16 is turned between a position where it entirely closes the channel outlet 17B in the air duct

17 and a position where it entirely closes the channel outlet 18B in the air duct 18, as for example illustrated in Figs. 1A and IB. According to this aspect, the damper 16 only impacts the airflow through one air duct 17, 18 at a time.

According to one aspect the damper 16 is a swivel/rotatable damper 16 with a V-shaped plate. The swivel/rotatable damper 16 may be a bent plate where the respective part of the V-shape has a shape corresponding to the shape of the channel outlets 17B, 18B or the channel inlets 17A, 18A of the air ducts 17, 18. The angle between the damper's 16 parts in the V-shape may have be angle of 20-150°, preferably 50-120°, and more preferably 80-100°. In one embodiment, the angle is 90°. To control the temperature of the supply air between a maximum position and a minimum position, the swivel/rotatable damper is turned with different degrees, depending on the angle of the swivel/rotatable damper 16. If the angle of the swivel/rotatable damper 16 is 90°, the damper is turned 90° to be moved between its two end positions. If the swivel/rotatable damper's 16 angle is greater than 90° the damper 16 needs to be turned less than 90° to be moved between its end positions, and in a corresponding manner the damper 16 needs to be turned more than 90° if the swivel/rotatable damper's 16 angle is smaller than 90°. If the angle of the swivel/rotatable damper 16 is greater than 90°, the swivel/rotatable damper 16 always somewhat impacts the airflow out of the channel outlets 17B, 18B or into the channel inlets 17A, 18A of the air ducts 17, 18. If the

swivel/rotatable damper's 16 angle is 90°, a swivel/rotatable damper 16 is achieved that only needs to be turned 90° to be moved between its two end positions while, in its end positions, it only impacts the airflow in one of the channel outlets 17B, 18B or the channel inlets 17A, 18A of the air ducts 17, 18. One advantage with a damper 16 with a V-shape is that it achieves a relatively constant impact on the airflow, entailing lower pressure drop in the plenum box 10 when the damper 16 controls the temperature in the airflow.

In one embodiment the heating/cooling battery 15 may be divided into sections or zones II, with the objective of heating or chilling each room 6 via its own sector/zone of the battery. Furthermore, in one embodiment heating of a room and chilling of another room 6 may occur, since these rooms have different and separate battery sections. Usually, each heating/cooling battery 15, II also has the same length, i.e. they are of equal lengths viewed in the airflow's direction.

In accordance with the invention, only one heating/cooling battery 15 is needed to supply each room 6 with an individual temperature in relation to other rooms. Furthermore, according to the invention, heating/cooling is controlled only with a simple swivel/rotatable damper 16 for each room 6. This means that the ventilation system according to the invention may comprise heating and/or cooling and be realised in a simple and cheap manner.

All ventilation ducts 1 and/or supply air outlets 14 extend from a plenum box 10, 11. From there, in one embodiment a ventilation duct 1 may lead to the respective room 6 which has an air supply device 14. Here, the air outlet/air supply device 14 and/or the ventilation duct 1 may be located in the floor and the supply air device may be located on the wall below the respective window in one or several rooms 6. In accordance with the invention, at least one heating and/or cooling battery 15 is located in the plenum box 10, 11, instead of separate heating/cooling batteries 15 being arranged at/in the respective room 6. In accordance with the invention, in some embodiments, so-called temperature dampers 16 may be used instead of flow dampers. At least one such damper 16 is located in the respective ventilation duct 1 and/or supply air outlet 14. A control central/regulator 3 and a sensor 4 are located in the respective room 6 and signal to the damper 16 via an electric cable 5. The plenum box 10, 11, the heating/cooling battery 15 and the dampers 16 are illustrated in Figs. 3A-3C. The regulator 3 in the respective room 6 is set at a certain temperature interval and signals to the damper 16. If the room 6 needs maximum heating the damper(s) 16 adjust themselves according to Fig. 3A and all the air is heated via the heating battery/batteries 15. This means that the air duct 18 is entirely closed while the air duct 17 is fully opened. The same applies if the room 6 "wants" to be chilled to a maximum. If the room 16 needs to be heated a little bit, the damper/dampers 16 are adjusted according to Fig. 3B, and some of the air passes via the heating battery/batteries 15 and its air duct 17, and the remaining air does not pass via the heating battery. In this case, the remaining air passes via the air duct 18, which does not temper the air significantly except via a certain loss. If the room 6 does not need to be heated further, the damper/dampers 16 are located according to Figure 3C and no air passes via the heating/cooling battery/batteries 15. This means that the air duct 17 is entirely closed while the air duct 18 is fully opened for by-pass. The same applies if the room 6 "does not want" to be chilled any more. In between there are many different positions of the damper/dampers 16 that can be set, depending on how warm or cold the supply air to the respective room 6 needs to be, and thus different quantities of air pass via the heating/cooling battery/batteries 15. Since an supply air outlet 14, and in some embodiments also a ventilation duct 1, leads to the respective room 6 and at least one damper 16 is located in each supply air outlet 14 and, in certain embodiments on each ventilation duct, there are different temperatures of the supply air in the respective room 6. The control parameter or the so-called governing parameter for this ventilation system is, in some embodiments, selected to be the room temperature. The desired temperature is set in the regulator 3 available in each room 6. The regulator 3 signals to the plenum box 10 with the help of an electric cable 5. The plenum box 10 contains an electric motor (not displayed) to turn each damper 16 and readjust its position in the airway. An air supply device 14, located in the room 6 where the regulator is located, is connected to the plenum box 10. The air outlet 14 on the plenum box 10 may be directly connected to the room 6 and thus constitute the supply air device in the room (illustrated in Figs. 3A-3C) or it may be connected to a ventilation duct 1, ending or debouching in the room 6 and in an air supply device 14 in the room

(illustrated in Figs. 1A-1C). The signals from the regulator 3 determine whether and to what extent the damper(s) 16 must be closed, opened or remain unchanged. When the room 6 is empty of people, there is no lighting, or any other impact, the damper(s) 16 is/are usually opened to a maximum. When the damper(s) 16 is/are opened to a maximum, the

temperature of the air to the room 6 is also at a maximum, so that the room may fulfil its heating requirements and ventilation requirements. As soon as people enter the room, the lamps are lit or some other load exists, heat is automatically supplied from other sources than the ventilation system. This means that the damper(s) 16 close the first air duct 17 with the heating battery 15 as the heating load increases in the room, and decreasing amounts of supply air flow is supplied to the room from this first channel, and the second air duct 18 is opened more so that the ventilation requirements regulating to the room 6 are fulfilled anyway. However, the minimum supply air flow that will be supplied to the room will always be an supply air flow so that the ventilation requirement is fulfilled. Alternatively, as the heating load to which the room is subjected increases, if instead a cooling battery 15 is used in this air duct, the damper(s) 16 and the first air duct 17 open up more, wherein the second air duct 18 is closed to the same degree as the first air duct 17 is opened.

Figs. 1A to 3C illustrate a plenum box 10, e.g. a distribution/plenum box 10 according to the invention. The ventilation damper 16 comprises a damper plate which is arranged in the air outlet 14 on the plenum box. The damper 16 is usually adjustably arranged in relation to the air outlet 14 and an airflow, so that the size of an airflow opening in the plenum box 10 may be adjusted. As described above, an airflow through the ventilation damper 16 may be adjusted by adjusting the airflow opening's size. As illustrated in the figures, the ventilation damper 16 may be fitted directly in a ventilation duct 1, whose opening extends out from a wall or a roof, or the plenum box's 10 encapsulation 11, or it may be an air supply device 14 or an air outlet located directly on the casing 11 of the plenum box. The plenum box 10 comprises an inside in the form of a chamber 12 and the airflow may flow in a direction illustrated with arrows that follow the air ducts 17, 18 in the figures. The plenum box 10's inside comprises a distribution chamber 12, to which one or at least two or several supply air outlets 14 are connected. The supply air outlet 14 and the damper 16 may, as illustrated in the figures, be arranged in different positions along the outside of the plenum box 10 and/or the ventilation duct 1. The ventilation duct 1 may, as illustrated in Figs. 1A-3C, have one or several branches, to which one or several fans 2 and air devices may be connected. The fan 2 is arranged to generate a pressure in the plenum box, so that a forced ventilation that is flow- and loss-optimised may be obtained in one or several rooms 6. The plenum box 10, as illustrated in the figures, may be installed in properties, e.g. residences, and the ventilation duct 1 may extend over several spaces for ventilation of these spaces.

The plenum box 10 in one embodiment comprises an adjustable damper 16 located down- stream of the plenum box's air inlet in each supply air outlet 14 downstream of the heating/cooling battery 15, to control the temperature of the supply air to the room 6. The damper 16 is adjustable by achieving an adjustable airflow opening with which the airflow through either or both of the air ducts 17, 18 and, through the air outlet 14, further to the room may be regulated. The plenum box 10, 11 in one embodiment comprises an adjustable damper 16 located downstream of the plenum box's air inlet 13, but upstream of the air ducts 17, 18 and the heating/cooling battery/batteries 15, to control the ventilation of at least one room 6 and/or regulate the temperature of the supply air into the room. The damper is adjustable by achieving an adjustable airflow opening, with which the airflow through either or both of the air ducts 17, 18 and further to the room may be regulated.

The damper 16 is arranged to close the first air duct 17 by adjusting the airflow opening's size, so that the second air duct 18 is opened, if the temperature of the supply air to the room 6 does not need to be increased or decreased in response to its heating and cooling

requirement. The damper 16 is arranged to close the second air duct 18 and open the first air duct 17 if the temperature of the supply air to the room 6 needs to be increased or decreased in response to its heating and cooling requirement.

The second air duct 18 may be likened to a bypass channel past the heating/cooling battery/sections II, 15 if he first air duct 17 is closed entirely, since the second air duct 18 is then entirely open and all the air is led past the first air duct 17. The temperature of the air into the plenum box 10 and through the air duct 18 may, in some embodiments, be regulated before it arrives to the plenum box.

The plenum box 10 in one embodiment comprises at least two heating/cooling

batteries/sections II, 15 connected in parallel. Each heating/cooling battery/section II, 15 in one embodiment is arranged in an individual separate air duct 17, 18. These air ducts 17, 18 are connected in parallel in one embodiment.

The heating and/or cooling battery 15, without or with sections II, is located in the distribution chamber 12 between its air inlet 13 (also the distribution box's 10 air inlet) and the plenum box's supply air outlet 14. The distribution chamber 12 is arranged with two separate air ducts 17, 18 for division/distribution of supply air. In one/the first air duct 17 at least one heating and/or cooling battery 15 is arranged. The air ducts 17 and 18 are arranged to supply a part each, or all the supply air if the other duct is entirely closed, via the air outlet 14 to each of the rooms 6, in response to each room's heating or cooling requirement. The plenum box 10 according to the invention may constitute a part of a larger ventilation system for ventilation of air to room 6 and/or regulation of the temperature in a room. The plenum box 10 according to the invention may be applied to at least two rooms 6. The ventilation system comprises a ventilation duct 1 for supply of at least a part of or all supply air to the plenum box 10 with the help of at least one fan 2. The plenum box 10 distributes, in turn, the supply air to one or several rooms 6, preferably at least two rooms. The plenum box 10 comprises an external casing 11 and an internal distribution chamber 12 with one or more air inlets 13 in airflow connection with the ventilation duct 1. The plenum box 10 comprises at least one heating or cooling battery 15 and/or at least one section II of a heating or cooling battery for demand-controlled heating and/or cooling of at least a part of the supply air to one or several rooms 6. The plenum box 10 comprises at least two supply air outlets 14. Each outlet functions as an supply air duct/device to one of the rooms 6.

The plenum box 10 comprises, in one embodiment, at least two heating/cooling batteries 15. In another embodiment, each heating/cooling battery is arranged in a separate air duct or the same air ducts 17, 18. In one embodiment, a heating battery 15 is arranged in the first air duct 17 while a cooling battery 15 is arranged in the other air duct 18 or vice versa.

The plenum box 10 according to the invention comprises at least one damper 16 located downstream of the plenum box's air inlet 13, but upstream of the air ducts 17, 18 and their channel inlet 17A, 18A.

The heating/cooling battery 15 comprises at least one coiled pipe within which a medium is arranged to circulate. The medium may be air, water or a similar fluid suitable for heat exchange, i.e. heating and/or cooling of supply air for room 6. The pipes inside the loop are arranged with or have integrated flanges (not illustrated) extending vertically in relation to the plane of the separation 19, i.e. the flanges' plane extension may run at a perpendicular angle in relation to the plane of the separation, as in the separation illustrated in Figs. 1A-1C and 2B and 3A-3C, or extend horizontally in relation to the plane of the separation, i.e. the flanges' plane extension may run parallel to the plane of the separation, as in the separation illustrated in Figs. 1A-1C and 2B and 3A-3C. The orientation of the flanges and the pipes is adapted to the application desired, so that no unnecessary losses are achieved when air flows over and past the pipes in a prior art manner, to heat or cool the same. The temperature in the

heating/cooling battery 15 is the same throughout the battery. Furthermore, the temperature in the heating/cooling battery 15 is outdoor compensated, i.e. its temperature is set in relation to the outdoor temperature.

The heating/cooling battery 15 may according to one aspect comprise a water circuit.

According to another aspect the heating/cooling battery 15 may comprise an electric heater. Furthermore, the plenum box 10 according to the invention comprises at least one damper 16 with a damper plate angled at an angle of 20° - 120°, preferably at an angle of 40° - 50°, but most preferably at an angle of around 45°. The damper's damper plate is then similar to an L with equally long legs when viewed form the side or in a cross-section. The damper's 16 damper plate is angled by being bent along its diameter to an angle of 20° - 120°, preferably to an angle of 40° - 50°, but most preferably to an angle of around 45°. The damper plate on the damper 16 means the damper is adjustable by achieving an adjustable airflow opening, with which the airflow through either or both of the air ducts 17, 18 and through to the room 6 may be regulated, since the damper plate closes or opens the respective channel outlet 17B or 18B. The plenum box 10 according to the invention may be arranged as an integrated part of the air treatment system for a whole building, e.g. a dwelling-house.

The swivel/rotative damper's 16 motion path is illustrated visually in Figs. 1A-1C, 2B and 3A-3C as dashed semi-circles. The swivel/rotative damper 16 is marked visually in Figs. 2A and 2C as a dashed surface in the part/section/zone IV on the right side of the fan 2, i.e. between the fan and the air outlets 17B, 18B. Nomenclature

1 Ventilation duct

2 Fan

3 Control central/Regulator

4 Sensors in rooms

5 Power cable

6 Room

10 Distribution/Plenum box for ventilation and/or temperature regulation of a room

11 Encapsulation/Casing for the plenum box

12 Distribution chamber inside the plenum box

13 Air inlet to the plenum box

14 Outlet from the distribution chamber/box/supply air duct/device to each room

15 Heating/cooling battery/heat exchanger for demand-regulated heating/cooling of supply air to room

15A Air inlet to heating/cooling battery/batteries.

16 Flow-controlled and/or temperature controlled damper in/for each supply air

channel/device to room

17 Separate first air duct in the plenum box for distribution of heated/cooled supply air 17A Air inlet to the first air duct 17

17B Air outlet from the first air duct 17

18 Separate second air duct in the plenum box for distribution of temperature regulated/non- temperature regulated supply air

18A Air inlet to the second air duct 18

18B Air outlet from the second air duct 18

19 Separation between the air ducts 17 and 18

19A Opening/hole in the separation 19 for receipt of supply air

Claims

1. Plenum box (10) for ventilation and temperature regulation of the air in at least two rooms (6), comprising at least one supply air inlet (13) for supply of supply air, at least two supply air outlets (14), for letting supply air, wherein the respective air supply outlets (14) are arranged to be connected, in terms of airflow, to a room (6), at least one heating-/cooling battery (15) for heating and/or cooling of the supply air and at least one first and one second air duct (17, 18),

wherein the first and the second air duct (17, 18) has a channel inlet (17A, 18A) at a first end and a channel outlet (17B, 18B) at a second end, and the channel inlets (17A, 18A) are connected, in terms of airflow, to the supply air inlet (13) and the channel outlets (17B, 18B) are connected, in terms of airflow, to the at least two supply air outlets (14), and that the heating/cooling battery (15) is arranged in the first air duct (17).

2. Plenum box (10) according to claim 1, comprising at least two dampers (16), wherein the respective damper is arranged to regulate the size of the channel outlets (17B, 18B) of the air duct (17, 18), to control the temperature of the supply air in the outlet (14) for supply air.

3. Plenum box (10) according to claim 2, wherein the respective damper (16) is located in a supply air outlet (14).

4. Plenum box (10) according to any of claims 2 or 3, wherein the respective damper (16) is a swivel/rotatable damper.

5. Plenum box (10) according to any of claims 2-4, wherein the respective damper (16) comprises a plate.

6. Plenum box (10) according to claim 5, wherein the plate is angled to a V-shape with an angle of 20 - 150 °, preferably 50 - 120 ⁰ and more preferably 80 - 100°.

7. Plenum box (10) according to any of claims 2-6, wherein the respective damper (16) is arranged to regulate the size of the first and the second air duct's channel outlet (17B, 18B) between a first and a second position, wherein in the first position the channel outlet (17B) of the first air duct (17) is open and the channel outlet (18B) of the second air duct (18) is entirely closed, and in the second position the channel outlet of the first air duct is entirely closed and the channel outlet of the second air duct is open.

8. Plenum box (10) according to any of the previous claims 2 to 7, wherein the respective damper (16) is adjustable by providing an adjustable airflow opening, with which the airflow through either or both of the air ducts (17, 18) and further to the room (6) may be controlled.

9. Plenum box (10) according to any of the previous claims, comprising a second

heating/cooling battery (15), wherein the second heating/cooling battery is arranged in the second air duct (18).

10. Plenum box (10) according to claim 9, wherein one heating/cooling battery (15) is a heating battery and the other heating/cooling battery (15) is a cooling battery.

11. Plenum box (10) according to any of the previous claims, wherein said heating/cooling battery (15) comprises at least two separate sections/zones (II).

12. Plenum box (10) according to claim 11, wherein the at least two separate sections (II) are of equal size.

13. Plenum box (10) according to any of the previous claims, wherein the air ducts (17, 18) are connected in parallel.

14. Plenum box (10) according to any of the previous claims, wherein the air ducts (17, 18) are separated in an air tight manner with a separation (19).

15. Plenum box (10) according to claim 14, wherein the separation (19) is arranged to extend from a first position in line with the heating/cooling battery's air inlet (15A), and to a second position in line with the distribution box's air outlet (14), seen in the direction of the airflow.

16. Plenum box (10) according to claim 14 or 15, wherein the separation (19) is located in the middle of the plenum box (10), and partitions the plenum box in such a manner that the two air ducts (17, 18) are of equal length.

17. Plenum box according to any of claims 14-16, wherein the damper (16) is fitted to the separation (19).

18. Plenum box (10) according to any of the previous claims, wherein the respective supply air outlet (14), for letting out supply air, is arranged in front of different parts/sections (II) of the heating/cooling battery (15).

19. Plenum box (10) according to any of claims 14-18, wherein the first and the second air duct (17, 18) are formed by the separation (19) and casing (11) of the plenum box (10).