Forced ventilation unit for ventilating an enclosed air space

Description

[0001] The invention relates to a forced ventilation unit for ventilating an enclosed air space between a wall and a piece of furniture using waste heat emitted by electronic units that can be arranged in the forced ventilation unit.

[0002] Particularly in new buildings, where the walls and especially the exterior walls are usually not yet completely dry, but also generally in all buildings with cold or wet walls, mold can grow between the walls or exterior walls and furniture standing on them, or in the air space between the walls and the furniture.

[0003] Such mold formation is caused by the temperature difference between the wall surface of the respective wall and the room or furniture temperature, the resulting difference in relative humidity and the restricted or completely prevented air circulation in the area between the piece of furniture and the wall or wall surface.

[0004] Various solutions are known from the state of the art, which usually involve blowing air into such an air space between a wall and a piece of furniture, thereby forcing air circulation or enabling natural convection.

[0005] However, such systems cannot be used in the case of an air space between the wall and the piece of furniture which is essentially completely or at least partially closed off by other walls, skirting boards or at least a panel, thus largely preventing natural air exchange, as is usually the case with built-in cupboards or kitchen furniture, since the air blown or pumped into the air space cannot be removed.

[0006] In addition, the systems known in the prior art only partially remove moisture already present in the gap, since the air blown in or flowing through the air space is already partially saturated with moisture and can often only absorb and accordingly remove small amounts of additional moisture.

[0007] If mold infestation has already occurred, the mold spores are usually blown out of the airspace in an uncontrolled manner by the known solutions and distributed throughout the room.

[0008] To the extent that the systems known in the prior art provide heating elements for heating the air conveyed into the air space, this results in high energy consumption for heating the air flow, which is correspondingly expensive and thus disadvantageous.

[0009] Also, the solutions often provided cannot be hidden or integrated into existing furniture, resulting in a visually unappealing appearance.

[0010] Further relevant prior art and in particular various forced ventilation units or aspects of such forced ventilation units are also known, for example, from the documents JP H05 191072 A, JP H05 103708 A, JP 2004 023036 A, EP 0 866 285 A2 and JP H08 42883 A.

[0011] The invention is therefore based on the object of overcoming the aforementioned disadvantages and providing a forced ventilation unit for ventilating a closed air space, which is designed to remove moisture present in the air space in an energy-efficient manner.

[0012] This problem is solved by the combination of features according to patent claim 1.

[0013] According to the invention, a forced ventilation unit for ventilating an air space, in particular closed off by at least one panel, between a wall and a piece of furniture arranged in a room is proposed, with the features of claim 1, so that the temperature and humidity in the air space can be set in a predetermined manner and thus a microclimate prevailing there can be created and / or regulated. In this case, the wall can enclose the room at least in sections and thus form it. A closed air space between the wall and the piece of furniture is understood here to mean that the air circulation or air exchange between the air space and the room is prevented or at least impeded without the forced ventilation unit according to the invention. Thus, the air space can be completely or only partially closed off by a panel or other elements, whereby natural air exchange is made difficult or prevented in each case.According to the invention, the forced ventilation unit can be arranged in or on the piece of furniture and comprises at least one fan and a heating unit. The heating unit itself has an openable receiving space for accommodating electronic units that generate waste heat as power dissipation. The at least one fan is designed to convey an inlet air stream from the room into the air space, leading or flowing through the heating unit and heated in the heating unit, to generate and / or regulate the microclimate prevailing in the air space.

[0014] The basic idea of ​​the invention is to provide a forced ventilation unit that can be used to prevent mold growth on walls or behind furniture or in other hard-to-reach areas where no or only minimal natural air exchange is possible. For this purpose, the forced ventilation unit is preferably designed to enable microclimate cultivation or microclimate control in the airspace by means of the at least one fan, the heating of the inlet airflow using the waste heat from the electronic units, and more preferably, a corresponding control of these components. Due to the utilization of waste heat during operation and / or charging of the electronic units, very little additional energy is required to heat the inlet airflow.

[0015] The electronic units can be a wide variety of electrical devices, such as smartphones, tablets, notebooks, kitchen appliances, tools or their chargers and / or power supplies.

[0016] In parallel with the desire to prevent mold growth behind furniture or other hard-to-reach areas, both in private homes and in laboratories and offices, many electrical outlets are occupied and thus blocked by power supplies and chargers for various electronic devices. These electronic devices, or their power supplies or chargers, usually generate a certain amount of power loss as waste heat, which is previously dissipated unused into the room.

[0017] The proposed solution allows these electronic devices, or their power supplies or chargers, to be arranged as electronic units within the storage space, allowing the resulting waste heat to be utilized. This not only utilizes the waste heat to heat the incoming airflow, thus minimizing the energy consumption of the forced ventilation unit, but also enables visually appealing storage of the electronic devices or electronic units.

[0018] The electronic units arranged in the receiving space can form the sole heat source of the heating unit or the forced ventilation unit, so that in such a design, the inlet air flow can be heated exclusively by the waste heat or the power dissipation of the electronic units. Accordingly, no additional energy is required to heat the air flowing through the heating unit, as this energy is already available.

[0019] The receiving space can be covered by a lid. If the forced ventilation unit is designed as a drawer, as explained later, the lid can be formed by an adjacent section of the piece of furniture in or on which the drawer is located.

[0020] However, since it can happen that too few electronic units are arranged in the receiving space or that the electronic units generally generate too little waste heat, an advantageous further development can provide for the heating unit to further comprise a heating element by means of which the inlet air flow can be heated. Such heating elements serve as additional heating, which are intended to compensate for insufficient heating of the inlet air flow due to the waste heat of the electronic units. These heating units can be formed by heating wires arranged in the heating unit or integrally by the at least one fan. In particular, the fan driving the inlet air flow can be controlled in such a way that power loss in the form of waste heat is generated thereat, which heats the inlet air flow.Since at least one fan is already present, it is not necessary to provide an additional heat source in addition to the fan and the electronic units. To enable heating of the inlet air flow in a predetermined manner, the heating element can be controlled by a control device (explained later) in such a way that a predetermined amount of heat is supplied to the air flowing along the inlet air flow.

[0021] According to the invention, an air flow (input air flow) with warm air can be specifically supplied to the air space, and an air flow (output air flow) can be discharged from the air space. For this purpose, the invention provides that the forced ventilation unit has at least two fans, of which at least a first fan is designed to convey or generate the incoming air flow, and of which at least a second fan is designed to convey or generate an output air flow, in particular leading or flowing through the forced ventilation unit and conveying air from the air space into the room. If the output air flow leads through the forced ventilation unit, any required baffles or other components, such as filters, can be particularly advantageously integrated into the forced ventilation unit.

[0022] A variant in which the at least one first fan is a radial fan and the at least one second fan is an axial fan is particularly advantageous. Furthermore, the radial fan can be arranged so as to protrude into the air space that the radial fan draws air axially through the heating unit to generate the inlet air flow and blows the air heated along the inlet air flow radially and preferably parallel to the wall into the air space. Although such a design is advantageous due to the prevailing spatial conditions and the respective desired flow or the respective desired flow directions of the respective air flow, it is also fundamentally possible to use an axial fan for the at least one first fan and / or a radial fan for the at least one second fan.

[0023] The use of a radial fan is particularly advantageous because the air space, or the air gap between the piece of furniture and the wall, is often very tight. Using an axial fan for the first fan would therefore require a sufficiently large distance between the fan and the wall or a deflection device to redirect the airflow, which is unnecessary when using a radial fan or ventilator that discharges the air radially.

[0024] Since such tight space conditions are not relevant in the room itself, an axial fan can be used for the second fan, which is particularly optimal due to the volume flow load of its V / p characteristic curve when extracting the air from the air space via the air ducts carrying the output air flow.

[0025] In order to be able to guide the air flows in a targeted manner and to prevent the inlet air flow and the outlet air flow from mixing, the forced ventilation unit is provided in a likewise advantageous variant with an outlet air duct and an inlet air duct. The outlet air duct determines a flow path for the outlet air flow and the inlet air duct determines a flow path for the inlet air flow. Furthermore, the inlet air duct is formed at least in sections by the receiving space or borders on it, enabling heat transfer. The inlet air duct can also be formed entirely by the heating unit or the receiving space of the heating unit. In addition, an inlet or outlet duct can be provided at an inlet end and an outlet end of the inlet and / or outlet air duct.An outlet opening can be provided as a ventilation opening in the forced ventilation unit, which can also be covered by a cover so that air can flow in or out from the adjacent areas outside the forced ventilation unit, i.e., from the room or the air space. Both the outlet air duct and the inlet air duct can be designed to be openable for maintenance purposes, and in particular, can be designed to be openable in a similar way to the receiving space.

[0026] Furthermore, the forced ventilation unit can be equipped with at least one filter through which the outlet air flow can flow and which is designed to filter the outlet air flow. This allows, in particular, mold spores that are transported out of the air space by the outlet air flow and would otherwise be blown into the room to be filtered out. If an outlet air duct is present, the filter can be arranged within it. A multi-stage filter is also possible.

[0027] However, a filter through which the inlet air flow can flow and preferably on the room or inlet side of the inlet air flow can be provided, through which dust can be filtered from the air flowing in from the room, so that the electronic devices or electronic units are not contaminated or damaged by dust.

[0028] To control or regulate the forced ventilation unit and thus also to control the air exchange in the airspace or the microclimate in the airspace, the forced ventilation unit preferably further comprises a control device for controlling and / or regulating the at least one fan or all fans and / or the electronic units and - if present - the heating element. For communication with the electronic units, appropriate control interfaces can be provided, for example. In a simple case, however, the electronic units can be controlled by controlling their respective power supplies. For example, individual or all electronic units can be supplied with power in a targeted manner according to a predetermined schedule.Additionally or alternatively, the forced ventilation unit can have a monitoring unit for monitoring the temperature of the heating unit and the electronic units arranged therein, which can also protect the heating unit and the electronic units from overheating or damage. The monitoring unit can also be integrated into the control unit, thus enabling data and information exchange. Both the control unit and the monitoring unit can be arranged in the receiving space or along the inlet airflow, so that any waste heat generated can be used directly to heat the inlet airflow.The control device also makes it possible, in particular, to cyclically control the at least one fan, so that, for example, in a first cycle only the inlet air flow is generated and in a second cycle, which is offset in time from the first, only the outlet air flow can be generated. The control by the control device can also be made dependent, in particular, on measured values ​​from sensors which can be connected to the control device. Such sensors can, in particular, be temperature and humidity sensors which can be arranged to record measured values ​​in the room and in the air space as well as in the forced ventilation unit and, for example, in the outlet and / or inlet air flow. If a heating element is present, this can be controlled by the control device depending on the temperature in the receiving space orthe temperature measured in the heating unit, so that the heating element is controlled to generate additional heat if the waste heat emitted by the electronic units is not sufficient to heat the air flowing in via the inlet air flow in a predetermined manner.

[0029] The control device can thus be designed to control the forced ventilation unit or its components in such a way that a microclimate is generated in the air space according to predetermined parameters and / or that the microclimate prevailing there is specifically influenced, whereby a humidity in the air space can be removed or adjusted, for example by combined cyclical heating and supply of air from the room into the air space and subsequent removal of the heated air, which absorbs moisture in the air space, from the air space.

[0030] Furthermore, the control device can also be configured to communicate with higher-level or secondary systems. For example, the control device can communicate with a computer, a smartphone, a smart home control center, a cloud storage system, or a residential ventilation control system for data or command exchange.

[0031] Accordingly, according to an advantageous variant, the forced ventilation unit can comprise room sensors for detecting the temperature and / or humidity in the room and / or air space sensors for detecting the temperature and / or humidity in the air space and / or receiving space sensors for detecting the temperature and / or humidity in the receiving space. These can each be connected to the control device and / or the monitoring device via signaling.

[0032] If the forced ventilation unit has sensors for detecting the temperature and / or air humidity and these are connected to the control device by means of signals, the control device is preferably designed to control the forced ventilation unit based on the (absolute) temperatures and / or air humidity detected by the sensors or the differences between detected temperatures and / or air humidity, which for this purpose can also be compared, for example, with predetermined characteristic curves or limit values.

[0033] For example, it can be provided that the at least one fan generating the inlet air flow is then controlled to suck in air and blow it out into the air space, i.e. to generate the inlet air flow, when the room temperature measured by the room sensor is greater than the air space temperature measured by the air space sensor in the area of ​​the wall or in the air space, or these temperatures differ from one another by a predetermined tolerance value. Likewise, the at least one fan generating the inlet air flow can alternatively or additionally be controlled to generate the inlet air flow if an air humidity measured by the air space sensor in the area of ​​the wall or in the air space is greater than an air humidity in the room measured by the room sensor, or if the two air humidity values ​​differ from one another by a predetermined tolerance value.

[0034] Furthermore, it can advantageously be provided that the forced ventilation unit has at least one electrical supply line and / or power supply device for supplying power to the electronic units in the receiving space. Furthermore, the forced ventilation unit can alternatively or additionally have at least one cable duct for routing cables leading from the electronic units out of the forced ventilation unit. In a simple case, a power distributor can be designed as a multiple socket outlet, the individual sockets of which can, however, be designed to be controllable by the control device.

[0035] Furthermore, the forced ventilation unit can, for example, have a power supply unit as a voltage supply device, which can replace the power supplies of the electronic units and can advantageously be designed for heat transfer of the waste heat to the inlet airflow. Such a power supply unit can, for example, have cooling fins through which the inlet airflow can flow.

[0036] In order to be able to subsequently integrate the forced ventilation unit according to the invention into a piece of furniture in a visually appealing manner or to arrange it on it, it is also provided that the forced ventilation system is designed as a drawer that can be integrated into the piece of furniture and / or arranged underneath the piece of furniture. In this case, the forced ventilation system can replace a drawer of the piece of furniture. Furniture, and in particular kitchen or laboratory furniture, often has skirting boards or plinth panels that conceal a gap between the floor and the underside of the furniture. If the forced ventilation system is to be arranged underneath the piece of furniture, such a plinth panel can, for example, be removed in sections so that the forced ventilation system replaces it towards the front of the furniture or towards the room.

[0037] The drawer has a front part facing the room, a rear part facing the wall, and two opposing side parts connecting the front part to the rear. The drawer also has an interior space that is open at the top and forms the receiving space, which can also define the entire heating unit. In a room surrounded by walls with a floor and ceiling, the top is understood to point towards the ceiling and the bottom to point towards the floor, so that the drawer is open on the side facing the ceiling. An inlet opening (ventilation opening) is formed on the front part and is preferably covered, i.e., blinded, by a panel. The inlet air flow can be sucked in through the inlet opening. At least one outlet opening (ventilation opening) is formed on the rear part and / or one of the side parts, through which the heated inlet air flow can be blown out.The outlet openings can also be covered by a respective cover.

[0038] In particular, by designing the forced ventilation system as a drawer and a corresponding design of the front part of the drawer, the visual impression of the furniture configuration is not negatively affected.

[0039] Furthermore, the drawer can be designed such that its rear part protrudes beyond a rear side of the piece of furniture facing the wall, so that air can be sucked in and / or blown out at the rear part parallel to a plane defined by the rear side of the piece of furniture.

[0040] An outlet opening (ventilation opening) is also formed on the front part, which can preferably be covered by a cover. The outgoing air flow can be blown out into the room through the outlet opening. Furthermore, at least one inlet opening (ventilation opening) is formed on the rear part and / or one of the side parts, through which the outgoing air flow can be drawn in from the air space.

[0041] Within the heating unit and in particular within the receiving space, at least one air guiding element can also be provided, through which the inlet air flow within the heating unit or the receiving space can be guided along a predetermined flow path.

[0042] Furthermore, heat exchangers or cooling elements can be provided in the receiving space or between the receiving space and the inlet air flow, which enable sufficient transfer of the waste heat from the electronic units to the inlet air flow.

[0043] A further aspect of the invention relates to a forced ventilation system consisting of a plurality of forced ventilation units according to the invention. These can each be arranged in or on different pieces of furniture adjacent to a common air space. The forced ventilation system or one of the forced ventilation units can have a central control device for controlling and / or regulating all forced ventilation units of the forced ventilation system, with preferably precisely one central control device being provided.

[0044] In the forced ventilation system consisting of a plurality of forced ventilation units, it can also be provided that the forced ventilation units are designed differently within the disclosure of the invention. For example, a first forced ventilation unit of the forced ventilation system can provide a radial fan as at least one first fan, and a second forced ventilation unit of the forced ventilation system can provide an axial fan as at least one first fan.

[0045] The features disclosed above can be combined as desired, as long as this is technically possible and they do not contradict each other.

[0046] Other advantageous developments of the invention are characterized in the subclaims or are presented in more detail below, together with the description of the preferred embodiment of the invention, with reference to the figures. They show: Fig. 1: Side view of a furniture configuration according to the prior art; Fig. 2: Side view of a furniture configuration with a forced ventilation unit; Fig. 3: Top view of a first variant of the forced ventilation unit; Fig. 4: Top view of a second variant of the forced ventilation unit; Fig. 5: Perspective view of a forced ventilation unit; Fig. 6: Perspective view of a forced ventilation system.

[0047] The figures are schematic examples. Identical reference numerals in the figures indicate identical functional and / or structural features.

[0048] In Figure 1a piece of furniture 4, such as a kitchen cupboard, is shown in a side or lateral sectional view, wherein an air space 2 is formed between the piece of furniture 4 and the wall 3 or the floor 3', which for simplicity can also be regarded as a wall. This air space 2 is closed off by an upper panel 41 and a base panel 42. Although a gap 43 is provided in the area of ​​the base panel 42, this gap is too small to allow sufficient air flow to prevent mold formation between the air space 2 and the space 5 in which the piece of furniture 4 is arranged. Accordingly, with this configuration, which essentially corresponds to the prior art, disadvantageous mold formation can occur in the air space 2.

[0049] Figure 2 reveals the structure according to Figure 1, wherein the base panel 42 was replaced by a forced ventilation unit 1 according to the invention. The forced ventilation unit 1 enables the targeted influencing of the microclimate prevailing in the air space 2, so that the air space 2 can be dehumidified and / or tempered to prevent mold growth. Accordingly, the forced ventilation unit 1 can generate an inlet air flow E from the room 5 into the air space 2, in which the air flowing through the forced ventilation unit 1 is heated by the waste heat of the electrical devices or electronic units arranged or can be arranged in the forced ventilation unit 1. The air from the air space 2 is also conveyed by the forced ventilation unit 1 by means of an outlet air flow A from the air space 2 into the room 5, so that moisture is also removed from the air space 2 with this air.

[0050] By heating the air flowing in via the inlet air flow E, its capacity to absorb moisture is increased. In the air space 2, the heated air absorbs at least a portion of the moisture present in the air space 2. The saturated air is then discharged from the air space 2 via the outlet air flow A.

[0051] As an alternative to the arrangement of the forced ventilation unit 1 on or below the piece of furniture 4, in particular a forced ventilation unit 1' designed as a drawer can be integrated into the piece of furniture 4, wherein a drawer of the piece of furniture 4 is replaced by the forced ventilation unit 1' designed as a drawer, which in Figure 2 is shown in dashed lines. This can be visually adapted to the piece of furniture 4 or the drawer of the piece of furniture 4 to be replaced, so that it visually blends in with the piece of furniture 4.

[0052] For example, the forced ventilation unit 1' in the present case projects beyond the rear side 42 of the piece of furniture 4 and blows the air via the inlet air flow E and sucks the air via the outlet air flow A parallel to the plane formed by the rear side 42.

[0053] The forced ventilation unit 1 underneath the piece of furniture 4 or the forced ventilation unit 1' as a drawer integrated into the piece of furniture 4 can each be operated according to a Figure 3 or 4 shown embodiment.

[0054] The Figure 3The forced ventilation unit 1 shown has a heating unit 13, which integrally forms the inlet air duct, as well as two separate outlet air ducts 15, through which air can be sucked out of the air space 2 and blown into the space 5. The heating unit 13 contains the receiving space 14 for accommodating electronic units, a control device 16 for controlling the forced ventilation unit 1 and its controllable components, and a power supply device 17 for supplying power to the control device 16 and at least some of the electronic units that can be arranged in the receiving space 14. In the present case, the control device 16 is thus designed to control at least the first fans 11, the second fans 12, and the power supply device 17.

[0055] The two outlet air ducts 15 are preferably closed at the top by an openable cover so that they can be easily opened for maintenance and cleaning. The heating unit 13, or the interior space forming the heating unit 13, of the forced ventilation unit 1 designed as a drawer is open at the top, but is covered by a component of the piece of furniture 4 when the drawer is closed, so that the heating unit 13 is also closed, allowing the inlet air flow E through the heating unit 13. Furthermore, an air inlet opening of the respective outlet air duct 15 is arranged on a side part S of the forced ventilation unit 1, so that air can be sucked in from the air space 2 to the side of the forced ventilation unit 1.

[0056] The heating unit 13 draws in (fresh) air from the room 5 and heats it along an inlet air flow E using the waste heat from electronic units arranged in the receiving space 14. In the present case, it is also provided that the air flowing along the inlet air flow E is heated by waste heat from the control device 16 and the power supply device 17. The electronic units emitting waste heat can be deliberately positioned in the receiving space 14 in order to utilize the waste heat that is already generated.

[0057] The heated air is then blown by the first fan 11 located on the rear part R of the forced ventilation unit 1 into the gap or air space 2 between the piece of furniture 4 and the wall 3 to heat the air cushion located there. After the air in the air space 2 has been sufficiently heated, the air or air cushion located there can absorb more humidity.

[0058] In a preferably staggered subsequent cycle, the second fans 12 on the front part F return the humidity-enriched air along the outlet air flow A and via the outlet air duct 15, in which filters through which the outlet air flow A flows can be arranged, to room 5. The filters in the outlet air duct 15 make it possible to clean air contaminated with mold spores or otherwise before or during the return transport to room 5.

[0059] The present design of the forced ventilation unit 1 as a drawer enables simple installation, maintenance, cleaning and easy retrofitting of existing pieces of furniture 4.

[0060] Electronic units that previously uncontrollably dissipated their power loss into heat somewhere in room 5 can be charged in a targeted manner (e.g., during overnight charging cycles) in the drawer, or more precisely, in the receiving space 14, so that the waste heat can be used appropriately and advantageously. The forced ventilation unit 1 also contributes to order and cleanliness in room 5. Additionally, a monitoring unit can be integrated into the control device 16, which can interrupt the voltage supply to the electronic units in the event of overheating or currents that would damage the electronic units.

[0061] The forced ventilation unit 1 according to the Figure 4 is constructed very similarly to the forced ventilation unit 1 according to the Figure 3 . A significant difference is that the forced ventilation unit 1 is designed according to the Figure 4provides exactly one output air duct 15, which has an inlet opening on the rear part R, so that the air is sucked in from the rear of the forced ventilation unit 1, conveyed along the output air flow A, and blown out of the front of the forced ventilation unit 1. Furthermore, only a first fan 11 is provided, which drives the inlet air flow E. This leads through the receiving space 14, wherein air guiding elements (not shown) are arranged in this, which guide the inlet air flow E in a meandering manner through the interior or the receiving space 14, so that waste heat from the electronic units located there can be absorbed and dissipated as evenly as possible.

[0062] In Figure 5a variant of the forced ventilation unit 1 is shown arranged in a piece of furniture 4, wherein the forced ventilation unit 1 protrudes or projects at the rear beyond a surface of the piece of furniture 4 facing the wall 3. The inlet opening of the outlet air duct 15 extends essentially from one of the side parts S to the opposite side part S, so that air can flow in across almost the entire width of the forced ventilation unit 1. Furthermore, the air from the air space 2 can also flow in via the side part S adjacent to the outlet air duct 15, in which side part S additional inlet openings can be provided for this purpose. This also makes it possible to suck in air from an air space 2 which extends between two adjacent pieces of furniture 4 or between a piece of furniture 4 and another, laterally adjacent wall. The first fan 11 is designed here as a radial fan, whereby a high pressure build-up in the narrow air gap orAirspace 2 can be reached, which is not easily possible with an axial fan due to the limited space in airspace 2. The flat design of the first fan 11 in airspace 2 is facilitated by the radial fan design. In particular, the radial fan design enables the first fan 11 to axially draw in air along the inlet air flow E and preferably to radially discharge the air drawn in along the inlet air flow E parallel to wall 3.

[0063] As in the Figures 3 and 4 the second fan 12 is further designed as an axial fan, which here due to its functional volume flow load of its V / p characteristic curve when sucking the air along the output air flow A via the output air ducts 15, due to the space and flow conditions for which axial suction and suction is optimal.

[0064] For control purposes, the positioning of the room sensors 51, which measure the temperature and humidity in the room 5, the positioning of the receiving room sensors 18, which measure the temperature and humidity in the receiving room 13, and the positioning of the air space sensors 21, which measure the temperature and humidity in the air space 3, are also shown here. The sensors 18, 21, 51 are each signal-related with the Figure 5 connected to a control device 16 (not shown), so that the measured values ​​recorded by the sensors 18, 21, 51 are available to the control device 16.

[0065] Both the absolute values ​​of the temperatures and air humidity measured by sensors 18, 21, 51 and the differences between the temperatures and air humidity between room 5, airspace 2, and forced ventilation unit 1 are relevant here. The at least one first fan 11 generating the inlet air flow E can, for example, be controlled to draw in air and blow it out into airspace 2, thus generating the inlet air flow E, when the room temperature measured by room sensor 51 is greater than the airspace temperature measured by airspace sensor 21 in the area of ​​wall 3 or in airspace 2. Likewise, the at least one first fan 11 generating the inlet air flow E is preferably controlled alternatively / additionally when the air humidity measured by airspace sensor 21 in the area of ​​wall 3 or in airspace 2 is greater than the air humidity measured by room sensor 51 in room 5.

[0066] In Figure 6 are two forced ventilation units 1, 1' similar to the variant from Figure 5arranged adjacent to one another in a respective piece of furniture 4, 4', wherein the first fan 11 for conveying the inlet air flow E in the forced ventilation unit 1 on the right in the representation plane, as in the forced ventilation unit 1 according to Figure 5, is also designed as a radial fan and the second fan 12 for conveying the outlet air flow A is designed as an axial fan, but no inflow of air via the side parts S is possible. In the forced ventilation unit 1' on the left in the representation plane, which is otherwise identical to the right-hand forced ventilation unit 1, the first fan 11' is designed as an axial fan, which, due to its design, is installed in such a way that the air can be deflected during intake or on the intake side and blown out parallel to the wall 3.The forced ventilation units 1, 1' or other forced ventilation units not shown can be interconnected in a cascade and controlled by a central control device. As shown, not all forced ventilation units need to be identically designed, but can take into account specific environmental conditions created by the respective piece of furniture 4, 4' and / or an adjacent section of the wall 3. Accordingly, however, all forced ventilation units of a forced ventilation system can also be identically designed.By means of the control device (not shown), the forced ventilation units 1, 1' can be controlled, for example, in such a way that firstly an inlet air flow E is generated into the air space 2 by the forced ventilation unit 1' on the left in the illustration and, at a different time or even at the same time, an outlet air flow A is generated from the air space 2 by the forced ventilation unit 1 on the right in the image plane and vice versa.

[0067] The invention is not limited in its implementation to the preferred embodiments described above. Rather, a number of variants are conceivable without deviating from the scope of the claims, which utilize the presented solution even in fundamentally different embodiments.

Claims

1. A forced ventilation unit (1) for ventilating a closed air chamber (2) between a wall (3, 3') and a piece of furniture (4) arranged in a room (5), wherein the forced ventilation unit (1) has at least one fan (11) as well as a heating unit (13), wherein the heating unit (13) has an openable receiving space (14) for receiving electronics units which generate waste heat as power loss, and wherein the at least one fan (11) is designed to convey an inlet air flow (E) leading through the heating unit (13) and heated in the heating unit (13) from the room into the air chamber (2) for the purpose of generating and / or regulating a microclimate prevailing in the air chamber (2), characterized in that the forced ventilation unit (1) further comprises at least two fans (11, 12), of which at least one first fan (11) is designed to convey the inlet air flow (E) and of which at least one second fan (12) is designed to convey an outlet air flow (A), wherein the forced ventilation unit (1) can be arranged in the piece of furniture (4) and is embodied as a drawer that can be integrated into the piece of furniture (4) or wherein the forced ventilation unit (1) is formed on the piece of furniture (4) and embodied as a drawer that can be arranged beneath the piece of furniture (4), wherein the drawer has a room-side front part (F), a wall-side rear part (R), and two oppositely situated side parts (S) connecting the front part (F) to the rear part (R), wherein the drawer has an interior space that is open at the top and forms the receiving space (14), wherein an inlet opening is formed on the front part (F) through which the inlet air flow (E) can be sucked in, and at least one outlet opening is formed on the rear part (R) and / or on at least one of the side parts (S) through which the heated inlet air flow (E) can be blown out, wherein an outflow opening is formed on the front part (F) through which the output air flow (A) can be blown out, and at least one inflow opening is formed on the rear part (R) and / or at least one of the side parts (S) through which the output air flow (A) can be sucked in.

2. The forced ventilation unit according to claim 1, wherein the heating unit (13) further comprises a heating element by means of which the inlet air flow (E) can be heated.

3. The forced ventilation unit according to claim 1 or 2, wherein the output air flow (A) passes through the forced ventilation unit (1) and conveys air from the air chamber (2) into the room (5).

4. The forced ventilation unit according to any one of the preceding claims, wherein the at least one first fan (11) is a centrifugal fan and the at least one second fan (12) is an axial fan.

5. The forced ventilation unit according to any one of the preceding claims, with an outlet air guide channel (15) which defines a flow path of the outlet air flow (A), and an inlet air guide channel which is formed at least in some portions by the receiving space (14) or adjoins the same so as to enable heat transfer and which defines a flow path of the inlet air flow (E).

6. The forced ventilation unit according to any one of preceding claims 3 to 5, with at least one filter through which the output air flow (A) can flow and which is designed to filter the output air flow (A).

7. The forced ventilation unit according to any one of the preceding claims, further comprising a control device (16) for controlling and / or regulating the at least one fan (11) and / or the electronics units and / or a monitoring unit for monitoring the temperature of the heating unit (13) and the electronics units that can be arranged therein.

8. The forced ventilation unit according to any one of the preceding claims, having room sensors (51) for detecting the temperature and / or humidity in the room (5) and / or having air chamber sensors (21) for detecting the temperature and / or humidity in the air chamber (2) and / or having receiving space sensors (18) for detecting the temperature and / or the humidity in the receiving space (14).

9. The forced ventilation unit according to any one of the preceding claims, having at least one electrical supply line and / or voltage supply device (17) for supplying voltage to the electronics units in the receiving space (14) and / or having at least one cable duct for guiding cables leading from the electronics units out of the forced ventilation unit (1).

10. The forced ventilation unit according to any one of the preceding claims, wherein the drawer is designed such that its rear part (R) projects beyond a rear side (42) of the piece of furniture (4) facing toward the wall, so that air can be sucked in and / or blown out at the rear part parallel to a plane defined by the rear side of the piece of furniture.

11. A forced ventilation system (10) consisting of a plurality of forced ventilation units (1) according to any one of the preceding claims, wherein the forced ventilation system (10) or one of the forced ventilation units (1) has a central control device for controlling and / or regulating all of the forced ventilation units (1) of the forced ventilation system (10).