Ventilation heating device for heating an air stream and method for operating a vent heater

Abstract

The invention relates to a vent heater (1) for heating an air stream (LS), having an air duct system (2) which comprises at least one air inlet (3) and one air outlet (4) arranged downstream in a designated flow direction of the air stream (LS), and having at least one catalysis unit (5) for flameless combustion of hydrogen, which is arranged in the air duct system (2) between the air inlet (3) and the air outlet (4), so that at least a part of the air stream (LS) can pass through the catalysis unit (5) and can be heated to form a hot air stream (WLS). According to the invention, the air duct system (2) has a collecting section (6) arranged downstream of the catalysis unit (5) in the flow direction, in which the hot air stream (WLS) of the catalysis unit (5) can be combined with a fresh air stream (FLS). The invention also relates to a method for operating a vent heater (1).

Description

[0001] Ventilation heating device for heating an air flow and method for operating a ventilation heating device

[0002] The present invention relates to a ventilation heating device for heating an air flow, comprising an air duct system that includes at least one air inlet and one air outlet arranged downstream along an intended flow direction of the air flow, and comprising at least one catalytic unit for the flameless combustion of hydrogen, which is arranged in the air duct system between the air inlet and the air outlet, so that at least a first partial air flow of the air flow can be passed through the catalytic unit and heated to a warm air flow. Furthermore, the invention relates to a method for operating a ventilation heating device.

[0003] Ventilation heaters for heating an air stream are widely known in the prior art. Often, a fossil fuel, such as propane gas or fuel oil, is used to operate such ventilation heaters. More environmentally friendly alternatives to such devices, which use hydrogen instead, are also known in the prior art.

[0004] For example, US Pat. No. 4,614,176 A discloses a device for heating air in which combustion occurs in the immediate vicinity of a metal hydride fuel storage unit, so that the heat of combustion causes the release of hydrogen from the metal hydride. The combustion zone contains a catalyst, and a semipermeable membrane separates the hydride fuel storage unit and the combustion zone. A disadvantage of this is that the heat of combustion and / or the moisture resulting from catalytic combustion cannot be adjusted, regulated, or changed, particularly during the device's intended use. Ventilation devices with heat exchangers are also known that utilize the thermal energy of an exhaust air stream from living spaces to preheat the supply air stream.Although the supply air stream can be preheated, due to the limited efficiency of the heat exchanger, it has a lower temperature than the extract air stream. Furthermore, this heating of the supply air stream leads to a reduction in relative humidity. This can deteriorate the air quality in the room, which can lead to physical discomfort for the occupants.

[0005] The object of the present invention is to eliminate the disadvantages known from the prior art. In particular, the object is to create a ventilation heating device for heating an air flow that delivers a clean, temperature-adjustable and / or humidity-regulated supply air flow.

[0006] The problem underlying the invention is solved by the features of the independent patent claims. Further advantageous embodiments emerge from the subclaims and the drawings.

[0007] A ventilation heating device for heating an air flow is proposed, comprising an air guidance system comprising at least one air inlet and one air outlet arranged downstream along an intended flow direction of the air flow, and comprising at least one catalytic unit for the flameless combustion of hydrogen, which is arranged in the air guidance system between the air inlet and the air outlet, so that at least a portion of the air flow can be guided through the catalytic unit and heated to a warm air flow.

[0008] An air flow is introduced into the air inlet of the air duct system, for example, from the environment and / or from upstream elements, in particular from a heat exchanger. If the ventilation heating device is located in or on a building, for example, a residential building, office building, hall, tent, and / or greenhouse, and / or is operatively connected to a room within the building, the ventilation heating device exchanges the room's used exhaust air flow with a fresh supply air flow. The air flow flowing into the air inlet of the air duct system is heated and / or humidified by the catalytic unit, so that the air inside the room does not become too cold and / or too dry due to the air exchange.

[0009] The hydrogen is fed to the catalysis unit as a reaction gas mixture together with the air stream or the oxygen contained in the air stream. The reaction gas mixture is preferably an air-hydrogen mixture. To obtain the necessary thermal energy to heat the air stream, the hydrogen reacts with the air or oxygen in the catalysis unit. This generates thermal energy through catalysis of the reaction gas mixture. The air stream exiting the catalysis unit is called the warm air stream. In addition to heating, the catalysis of the reaction gas mixture contributes to humidification of the warm air stream.

[0010] Since the reaction gas mixture is catalyzed in the catalyst by the catalytic unit, the heat energy is generated flamelessly. The hydrogen content of the supplied reaction gas mixture is preferably outside the explosive range, in particular below 4 vol. This prevents an explosion of the reaction gas mixture.

[0011] According to the invention, the air guidance system comprises a collection section arranged downstream of the catalytic unit in the flow direction, in which the warm air flow from the catalytic unit can be combined with a fresh air flow. A collection section is understood to be a section of the ventilation system into which at least two air flows flow and / or can be combined. Depending on the position or operating mode of the ventilation heating device, one or both air flows can flow in simultaneously and / or sequentially. After being combined in the collection section, at least one air flow exits the collection section. The air flow exiting the collection section can be the supply air flow.

[0012] The warm air flow generated by the catalytic unit can be mixed or combined with the fresh air flow in the collection section and discharged as supply air flow through the outlet opening of the air duct system. As already described above, the catalysis of the reaction gas mixture by the catalytic unit contributes to both heating and humidifying the warm air flow. By adding and / or mixing the warm air flow and the fresh air flow in the collection section, the supply air flow, which preferably flows into the room, can be adjusted. Thus, the warm air flow can be cooled and / or dehumidified by adding the fresh air flow. Additionally or alternatively, the fresh air flow can be heated and / or humidified by adding the warm air flow.

[0013] It is advantageous if the collection section comprises a warm air inlet for the warm air flow and a fresh air inlet for the fresh air flow, so that the warm air flow and / or the fresh air flow are collected and / or mixed in the collection section. For this purpose, an inlet channel is preferably connected to the warm air inlet and the fresh air inlet.

[0014] It is also advantageous if the at least one air outlet is arranged on the collection section and / or downstream of the collection section in the flow direction. The air flow exiting the air outlet is thus the supply air flow collected and / or mixed in the collection section.

[0015] It is also advantageous if the air guidance system comprises at least one bypass duct for providing the fresh air flow, wherein the bypass duct preferably connects the air inlet and the fresh air inlet of the collection section. The fresh air flow can be guided from the air inlet to the collection section by means of the bypass duct.

[0016] It is also advantageous if the bypass duct and the catalytic unit are connected in parallel. This allows the fresh air flow and the warm air flow to be guided parallel to each other and / or independently of each other from the air inlet to the air outlet. The bypass duct and the catalytic unit can be connected in parallel, either side by side or inside each other. If the bypass duct is connected in parallel, the catalytic unit, for example, can be arranged concentrically within the bypass duct. Such parallel connections reduce space requirements and simplify the replacement of existing ventilation heating devices.

[0017] It is also advantageous if the air guidance system has at least one distributor section, wherein the distributor section preferably comprises the air inlet and / or is arranged downstream of the at least one air inlet in the flow direction.

[0018] It is also advantageous if the collection section is designed as a collector, in particular as a Y-collector, T-collector and / or collection box. The Y-collector can also be called a Y-piece. The warm air flow and the fresh air flow preferably flow in at the angled legs, whereby they are each deflected at the same angle to the supply air flow. The T-collector can also be called a T-piece. Here, two of the flows, preferably the warm air flow and the supply air flow or the fresh air flow and the supply air flow, run along the flow direction. The remaining flow, preferably the fresh air flow or the warm air flow enters at an angle to this flow direction. The collection box can collect the warm air flow and / or the supply air flow within a box and output it as a supply air flow.Similar to the collecting section, the distribution section can also be designed as a distributor, in particular as a T-distributor, Y-distributor and / or distribution box.

[0019] It is advantageous if the distributor section is located upstream of the catalytic unit and / or the bypass duct, so that the air flow can be divided by the distributor section into a first partial air flow for the warm air flow and / or a second partial air flow for the fresh air flow. The flow direction is understood to be the direction of the air flow that runs through the ventilation heating device. If the air flow splits in the distributor section into the first partial air flow and the second partial air flow, these have independent flow directions. The flow directions of the partial air flows are then combined into a common flow direction in the collection section.

[0020] It is also advantageous if the ventilation heating device comprises at least one control element, in particular a warm air control element, a fresh air control element and / or a main fan, for controlling the flow rate of the air flow, the first partial air flow and / or the second partial air flow. The warm air control element controls the warm air flow. The fresh air control element controls the fresh air flow. The main fan controls the air flow. Since the first partial air flow and / or the second partial air flow depend on the air flow, the main fan controls them indirectly. It is also advantageous if the warm air control element, in particular a warm air fan, is designed to control the flow rate of the first partial air flow for the warm air flow.Additionally or alternatively, the fresh air control element, in particular a fresh air fan, is designed to control the flow velocity of the second partial air flow for the fresh air flow. Thus, the warm air flow and the fresh air flow can be controlled independently of each other.

[0021] It is also advantageous if the warm air control element is arranged between the distributor section and the catalytic unit and / or in the region of the catalytic unit and / or between the catalytic unit and the collection section. Additionally or alternatively, it is advantageous if the fresh air control element is arranged between the distributor section and the bypass duct and / or in the region of the bypass duct and / or between the bypass duct and the collection section.

[0022] It is also advantageous if the ventilation heating device comprises at least one main fan for accelerating the air flow along the flow direction, wherein the distributor section is preferably arranged downstream of the main fan in the flow direction. Additionally or alternatively, the warm air control element and / or the fresh air control element is arranged downstream of the main fan.

[0023] It is also advantageous if the catalytic unit and / or the collection section comprises at least one humidification device for humidifying the warm air stream. In the humidification device, water is preferably introduced into the warm air stream and / or evaporated therein. This allows the warm air stream to be further humidified. Due to the increased temperature of the warm air stream, the risk of hygiene problems, in particular mold formation in the ventilation heating device and / or in supply lines to the room, can be minimized. It is advantageous if an air supply duct for providing an air supply for a room is arranged downstream of the collection section in the direction of flow. Living beings and / or plants, for example, may be present in the room, which is why it can also be called a recreation room. As already described above, this can be a room in buildings, halls, tents, and / or greenhouses.The air outlet of the air duct system can be located upstream and / or downstream of the supply air duct.

[0024] Furthermore, it is advantageous if the ventilation heating device has at least one heat exchanger, in particular an air / air heat exchanger, wherein the heat exchanger is operatively connected to the distributor section via an air supply connection and / or the distributor section is preferably arranged downstream of the heat exchanger in the flow direction.

[0025] It is advantageous if the heat exchanger comprises the supply air connection for the distribution section, an exhaust air connection for the room, an outside air connection and an exhaust air connection. The heat exchanger is preferably designed such that an outside air flow flowing in through the outside air connection is heated in the heat exchanger to form the air flow flowing out through the supply air connection, and that an exhaust air flow flowing in through the exhaust air connection is cooled in the heat exchanger to form an exhaust air flow flowing out through the exhaust air connection. The air flow flowing out of the supply air connection is then fed to the ventilation heating device via the air inlet and / or the distribution section. This allows the waste heat from the exhaust air flow of the room to be used to heat the air flow. This already heated or pre-conditioned air flow can be heated and / or humidified by means of the catalytic unit to form the warm air flow.Additionally or alternatively, this preconditioned air flow can be directed as a fresh air flow via the bypass duct to the collection section. It is also advantageous if the catalytic unit, the collection section, the distribution section, the bypass duct, the heat exchanger, the at least one control element, the supply air duct, the air inlet, and / or the air outlet are operatively connected. In the ventilation heating device, the operative connection is preferably understood to mean the fluid-mechanical and / or thermodynamic operative connection. Thus, the operatively connected components can transmit and / or transfer flows, temperatures, and / or humidity.

[0026] It is also advantageous if the catalysis unit comprises at least one guide channel for guiding the first partial air flow and / or the warm air flow, at least one catalyst for catalyzing the hydrogen, an additional electric heater for heating and / or drying the catalyst, a mixing section for mixing the first partial air flow and the hydrogen, a temperature sensor, a humidity sensor and / or a gas sensor for determining the mixing ratio of the air-hydrogen mixture.

[0027] Advantageously, the auxiliary heater is designed as a jacket heater and / or extends in the area of ​​the catalyst around the combustion section, in particular its tube section. When starting the device, moisture deposits may be present on the catalyst, which is particularly hydrophilic and can hinder a reliable start of the flameless catalytic combustion. The auxiliary heater can be used to heat and / or dry the catalyst before and / or during the start-up process, so that the reaction unit, designed as a catalyst unit, can be started reliably.

[0028] Preferably, the temperature sensor is arranged in or near the combustion section. The temperature sensor in or near the combustion section serves to indicate whether the combustion process is running and heat is being generated. Additionally or alternatively, this sensor or its data can be used, particularly by a control device, to regulate the amount of hydrogen supplied and / or at least one of the air streams.

[0029] It is also advantageous if the ventilation heating device comprises at least one control device with at least one data interface, wherein the ventilation heating device can be adjusted by means of the control device, preferably between a heating position, an air exchange position, and / or a mixing position. This ensures reliable starting and / or reliable catalytic, flame-free combustion.

[0030] It is advantageous if the temperature sensor, the gas sensor, at least one of the control elements, the humidification device, the additional heating, a hydrogen valve, the humidity sensor and / or a room air sensor are operatively connected to the data interface of the control device.

[0031] The heating output of the ventilation heating device can be controlled by the control device, preferably via the amount of air and / or hydrogen supplied to the mixing section. The air flow is preferably regulated by the control device controlling at least one of the control elements, in particular the warm air fan and / or the main fan, accordingly. Additionally or alternatively, the amount of hydrogen is regulated by the control device controlling the hydrogen valve accordingly. This allows the warm air flow to be regulated.

[0032] Additionally or alternatively, the temperature is controlled, in particular by the warm air control element and / or the fresh air control element, in such a way that the warm air flow and / or the fresh air flow is controlled and / or regulated. To increase the temperature of the supply air flow, the ratio between warm air flow and fresh air flow is changed so that more warm air flow flows into the collection section. To reduce the temperature of the supply air flow, the ratio between warm air flow and fresh air flow is changed so that more fresh air flow flows into the collection section. For this purpose, it is advantageous if the ventilation heating device has a plurality of temperature sensors and / or humidity sensors, wherein these are advantageously arranged in the catalytic unit, in the collection section, in the distribution section, in the bypass duct, in the supply air duct and / or in the room.

[0033] Additionally or alternatively, the control device receives a setpoint from a user, in particular a setpoint temperature and / or a setpoint humidity. This can be transmitted and / or specified by the user, preferably via an input / output interface of the ventilation heating device of the control device.

[0034] The control device preferably receives an actual temperature via at least one of the temperature sensors and / or the room air sensor and regulates this to the target temperature specified by the user by correspondingly controlling at least one of the control elements and / or hydrogen valve.

[0035] The control device preferably receives an actual humidity via at least one of the humidity sensors and / or the room air sensor and regulates this to the target humidity specified by the user by correspondingly controlling at least one of the control elements, the humidification device and / or the hydrogen valve.

[0036] Additionally or alternatively, the control device can determine a target mixing ratio of the air-hydrogen mixture, in particular based on the predetermined target temperature and / or the target humidity. Additionally or alternatively, this target mixing ratio can be specified to the control device. Additionally or alternatively, a mathematically and / or empirically determined target mixing ratio correlating with the target temperature and / or the target humidity can be stored in a memory of the control device. The control device is preferably designed such that, based on the target mixing ratio, it adjusts the actual mixing ratio of the air-hydrogen mixture, sensed by at least one of the sensors, in particular the gas sensor, to the target value.

[0037] It is also advantageous if the catalytic unit comprises a catalytic combustion section, in particular a combustion chamber, in which the catalyst is arranged.

[0038] It is advantageous if the catalyst is arranged in the combustion section in such a way that it forms a flow-through partition wall which divides the combustion section, in particular the combustion chamber, into two subsections, in particular two subchambers.

[0039] It is advantageous if the catalyst is permeable, particularly as a grid, hydrophilic, and / or made of titanium. In this case, the catalyst is advantageously designed as a permeable grid.

[0040] It is also advantageous if the catalyst comprises a base body with tubular and / or honeycomb-shaped reaction channels, wherein the base body is preferably made of monolith and / or ceramic, in particular cordierite and / or AlMg silicate. Thus, the catalyst can be structurally similar to a vehicle catalyst, which can reduce the manufacturing costs of the ventilation heating device. Due to the ceramic construction of the base body, it is also temperature-stable.

[0041] It is also advantageous if the catalyst is used as an exhaust gas catalyst of a

[0042] Motor vehicle exhaust catalysts are very inexpensive to procure due to mass production. This significantly reduces the cost of the catalytic unit and thus the ventilation heating system. Both the structural design of the catalyst and the chemical properties of the catalytically active coating can be used to generate the warm air flow.

[0043] It is advantageous if the catalyst comprises a metal oxide coating to increase the surface area and / or a platinum, rhodium, iridium, and / or palladium coating as a catalytically active layer. The metal oxide coating is designed as a porous coating to increase the surface area. The platinum, rhodium, iridium, and / or palladium coating represent the catalytically active substances.

[0044] It is also advantageous if the air duct system comprises at least one air purification device, particularly one designed as an air filter, wherein the air purification device is preferably arranged in the region of the air inlet and / or the air outlet. Thus, the outside air flow, the air flow, and / or the supply air flow can be purified, particularly filtered.

[0045] It is also advantageous if the combustion section, particularly in the first subsection, comprises a mixture inlet for an air-hydrogen mixture and, particularly in the second subsection, a warm air outlet for the warm air flow.

[0046] It is also advantageous if the mixture inlet is arranged at a first end of the combustion section in the flow direction, and the warm air outlet is arranged at an opposite second end of the combustion section. It is also advantageous if the catalytic unit comprises a mixing section into which hydrogen and air can be fed and mixed with each other to form the air-hydrogen mixture, wherein the mixing section preferably comprises an inlet opening for the first partial air flow, a hydrogen inlet, and / or a mixture outlet.

[0047] It is also advantageous if the inlet opening is arranged along the flow direction at a first end of the mixing section, the mixture outlet at an opposite second end of the mixing section and / or the hydrogen inlet between these two ends.

[0048] It is advantageous if the mixing section comprises a first section, in particular a conical one, tapering from the inlet opening toward the mixture outlet, a second section, in particular a cylindrical one and / or of constant diameter, and / or a third section, in particular a conical one, widening from the inlet opening toward the mixture outlet, and / or if the hydrogen inlet is arranged in the region of the second section. This ensures reliable mixing of the hydrogen flowing into the mixing section with the air flow also flowing in.

[0049] It is also advantageous if the catalytic unit comprises a sensor section, which is preferably arranged between the mixing section and the combustion section. The gas sensor for determining the imbalance of the air-hydrogen mixture is preferably arranged in the sensor section.

[0050] It is also advantageous if the mixing section, the sensor section, and / or the combustion section are configured as a tube, at one end of which the inlet opening is located and at the other end of which the outlet opening is located, and / or if the tube comprises a plurality of interconnected, in particular detachably connected, tube elements, which preferably comprise at least one of the sections. The tubular design allows for reduced construction complexity. Furthermore, the multi-part design comprising a plurality of tube elements simplifies maintenance and repair.

[0051] Accordingly, the pipe can, for example, have a first pipe element with the mixing section, a second pipe element with the sensor section, and / or a third pipe element with the combustion section. These can be detachably connected to one another in correspondingly designed connecting regions. The connecting regions are preferably designed as flanges that are screwed together. The mixing section is preferably arranged downstream of the distributor section along the flow direction. It is also advantageous if the collecting section is arranged downstream of the combustion section. Thus, the humidification device can be arranged on or in the combustion section and / or on or in the collecting section. Downstream of the combustion section, the temperature is sufficiently high for the evaporation of the water introduced by the humidification device.

[0052] Furthermore, a method for operating a ventilation heating device is proposed. In the method, an air flow is provided at an air inlet of an air duct system. At least a first partial air flow of the air flow is heated to a warm air flow, in particular by a catalytic unit of the ventilation heating device. Additionally or alternatively, at least a second partial air flow of the air flow is provided as a fresh air flow, in particular by a bypass duct of the ventilation heating device.

[0053] According to the invention, the ventilation heating device is adjustable, in particular by a control device, between a heating position, an air exchange position, and / or a mixing position. The ventilation heating device is preferably designed according to the preceding description, whereby the aforementioned features can be present individually or in any combination.

[0054] It is advantageous if the air flow in the heating position of the ventilation heating device is completely heated to the warm air flow and / or the air flow completely transitions into the first partial air flow. Additionally or alternatively, it is advantageous if the air flow in the air exchange position of the ventilation heating device completely transitions into the second partial air flow. Additionally or alternatively, it is advantageous if the air flow in the mixing position of the ventilation heating device is divided into the first partial air flow and the second partial air flow.

[0055] Further advantages of the invention are described in the following exemplary embodiments. They show:

[0056] Figure 1 is a highly simplified schematic sectional view of a ventilation heating device according to an embodiment, and

[0057] Figure 2 is a highly simplified schematic sectional view of a ventilation heating device according to an alternative embodiment.

[0058] In the following description of the figures, the same reference numerals are used for identical and / or at least comparable features in the various figures. The individual features, their design, and / or mode of operation are usually only explained in detail when first mentioned. If individual features are not explained in detail again, their design and / or mode of operation correspond to the design and mode of operation of the features with the same or identical functions already described.

[0059] Figure 1 shows a highly simplified schematic sectional view of a ventilation heating device 1 for heating an air flow LS according to one exemplary embodiment. The ventilation heating device 1 shown here can be arranged, for example, outside a building or, for example, in a utility room, inside the building.

[0060] The ventilation heating device 1 has an air duct system 2 through which the air flow LS can be directed or guided along a flow direction from at least one air inlet 3 to at least one air outlet 4. With the aid of at least one catalytic unit 5, a warm air flow WLS can be generated by flameless combustion of hydrogen. In a collection section 6 of the air duct system 2 arranged downstream of the catalytic unit 5 in the flow direction, the warm air flow WLS from the catalytic unit 5 can be combined with a fresh air flow FLS.

[0061] The respective flow directions of the individual air streams are indicated by arrows in the illustrated embodiment. The flow direction of the air stream always refers to the flow direction of the air stream flowing in the described section or area of ​​the air duct system 2.

[0062] In the exemplary embodiment shown, the collecting section 6 is designed as a Y-collector or Y-piece. Alternatively, the collecting section 6 can also be designed as a T-collector or collecting box. In the exemplary embodiment shown, the collecting section 6 has a warm air inlet 7 for the warm air flow WLS and a fresh air inlet 8 for the fresh air flow FLS. Depending on the position or mode of the ventilation heating device 1, the warm air flow WLS flows in through the warm air inlet 7 and / or the fresh air flow FLS flows in through the fresh air inlet 8. The air flow gathered in the collecting section 6 and flowing out of the collecting section 6 can be called the supply air flow ZUS, since it can be introduced directly and / or indirectly into a room 16. In the exemplary embodiment shown, a supply air duct 15 is arranged downstream of the collecting section 6 along the flow direction of the air flow, in particular the supply air flow ZUS, in order to provide the supply air flow ZUS for the room 16.In the illustrated embodiment, the air outlet 4 of the air duct system 2 is located at the end of the supply air duct 15 or in the area where the supply air duct 15 is operatively connected to the room 16. It is also conceivable that the transition from the collection section 6 to the supply air duct 15 is to be understood as the air outlet 4.

[0063] To guide the fresh air flow FLS along its flow direction, a bypass channel 9 is arranged upstream of the collection section 6. The bypass channel 9 is preferably arranged at the fresh air inlet 8 of the collection section 6 and / or is operatively connected thereto. In the illustrated embodiment, the bypass channel 9 and the catalytic unit 5 are arranged parallel to one another and connected in parallel.

[0064] In order to be able to divide the air flow LS, which flows into the air duct system 2 through the air inlet 3, into the warm air flow WLS and the fresh air flow FLS, the air duct system 2 has a distributor section 10. In the exemplary embodiment shown, the distributor section 10 is connected upstream of the bypass duct 9 and the catalytic unit 5. With the aid of the bypass duct 9, the air flow LS is initially divided into a first partial air flow TL1 and a second partial air flow TL2. The first partial air flow TL1 is guided by the catalytic unit 5 from the distributor section 10 to the collection section 6 and / or heated and / or humidified by the catalytic unit 5 to form the warm air flow WLS. To guide the first partial air flow TL1 and / or the warm air flow WLS, the catalytic unit 5 can have and / or form at least one guide duct 22.The second partial air flow TL2 is guided as fresh air flow FLS, in particular by means of the bypass duct 9, from the distributor section 10 to the collection section 6.

[0065] In order to be able to control the flow velocity of the air flow LS, the first partial air flow TL1 and / or the second partial air flow TL2, the ventilation heating device 1 has at least one control element 11, 12, 13. The flow velocity of the air flow LS, which preferably flows into the distribution section 10, can be controlled by means of a main fan 13. Since preferably all air flows within the ventilation heating device 1 depend on this air flow LS, the flow velocities of all air flows can be controlled at least partially or indirectly by means of the main fan 13.

[0066] To control the flow velocity of the first partial air flow TL1 and / or the warm air flow WLS, the ventilation heating device 1 has a warm air control element 11. In the exemplary embodiment shown, the warm air control element 11 is arranged upstream of the catalytic unit 5 and / or downstream of the distributor section 10. It is also advantageous if the warm air control element 11 is designed as a warm air fan in order to be able to accelerate the first partial air flow TL1 and / or the warm air flow WLS. To control the flow velocity of the second partial air flow TL2 and / or the fresh air flow FLS, the ventilation heating device 1 has a fresh air control element 12. In the exemplary embodiment shown, the fresh air control element 12 is arranged upstream of the bypass duct 9 and / or downstream of the distributor section 10.It is also advantageous if the fresh air control element 12 is designed as a fresh air fan in order to be able to accelerate the second partial air flow TL2 and / or the fresh air flow FLS. In the exemplary embodiment shown, the warm air control element 11 and the fresh air control element 12 are arranged downstream of the distributor section 10, for example. Additionally or alternatively, the warm air control element 11 and / or the fresh air control element 12 can be arranged in the region of the catalytic unit 5 or in the region of the bypass duct 9 and / or upstream of the collection section 6. It is also conceivable for only the main fan 13 to accelerate the air flow LS and for the warm air control element 11 and / or the fresh air control element 12 to be designed as control flaps, in particular arranged in the distributor section 10, for controlling the warm air flow WLS and / or the fresh air flow FLS.

[0067] The catalysis unit 5 comprises at least one catalyst 23 for catalyzing the hydrogen, at least one additional electric heater 24 for heating and / or drying the catalyst 23, a mixing section 25 for mixing an air-hydrogen mixture, a temperature sensor 26, a gas sensor 27 for determining the mixing ratio of the air-hydrogen mixture, a catalytic combustion section 33 and / or a sensor section 34.

[0068] In the illustrated embodiment, the warm air control element 11, the mixing section 25, the sensor section 34, and / or the combustion section 33 are arranged, for example, one after the other along the flow direction of the first partial air flow TL1 and / or the warm air flow WLS. The first partial air flow TL1 flows from the distributor section 10 into the warm air control element 11 and / or is accelerated by this warm air control element 11, which is designed as a warm air fan.

[0069] The first partial air stream TL1 then flows into the mixing section 25. In the mixing section 25, the first partial air stream TL1 is mixed with hydrogen so that the air-hydrogen mixture can be formed. For introducing the hydrogen, the mixing section 25, in particular as a mixing chamber, has a hydrogen supply line 35. In order to ensure reliable mixing of the hydrogen flowing into the mixing section 25 with the likewise incoming first partial air stream TL1, the mixing section 25 comprises, from an inlet opening of the mixing section in the direction of a mixture outlet of the mixing section, a first section that tapers, in particular conically, a second section that is in particular cylindrical and / or of constant diameter, and / or a third section that widens, in particular conically. The hydrogen supply line 35 is arranged in the region of the second section.Due to the shape described above, a differential pressure can arise between the first section and the third section. This difference leads to the so-called Venturi effect, by means of which the first partial air flow TL1 can be accelerated in addition to or as an alternative to the warm air control element 11. The air-hydrogen mixture then flows out of the mixture outlet of the mixing section 25 and into the sensor section 34.

[0070] The sensor section 34 is arranged downstream of the mixing section 25 along the flow direction of the warm air flow WLS. Within the sensor section 34, for example, the gas sensor 27 for determining the mixing ratio of the air-hydrogen mixture is arranged. The sensor section 34 can be designed as a sensor chamber.

[0071] In the exemplary embodiment shown, the combustion section 33 is arranged downstream of the mixing section 25 and the sensor section 34. The catalytic converter 23 is arranged in the combustion section 33. In the exemplary embodiment shown, the catalytic converter 23 is arranged in the combustion section 33 in such a way that it forms a flow-through partition wall that divides the combustion section 33 into two subsections. In the present exemplary embodiment, the catalytic converter 23 is designed as a flow-through grid. Furthermore, the catalytic converter 23 can be hydrophilic. Preferably, the catalytic converter 23 is made of titanium and / or has a metal oxide-platinum coating. Additionally or alternatively, the catalytic converter 23 can be designed similarly to a vehicle exhaust gas catalytic converter. A corresponding catalytic converter 23 is shown, among other things, in the exemplary embodiment in Figure 2.

[0072] The combustion section 33 comprises, in the first subsection, a mixture inlet for the air-hydrogen mixture and, in the second subsection, an outlet opening for the heated and / or humidified warm air flow WLS. According to the exemplary embodiment shown, the mixture inlet is arranged at a first end of the combustion section 33 in the flow direction of the warm air flow WLS, and the outlet opening is arranged at an opposite second end of the combustion section 33. The outlet opening is simultaneously the outlet opening of the catalytic unit 5. The collection section 6 is arranged downstream of the outlet opening of the combustion section 33. The warm air flow WLS can thus flow from the outlet opening of the combustion section 33 into the warm air inlet 7 of the collection section 6.

[0073] In the illustrated embodiment, a humidification device 14 for humidifying the warm air flow WLS is arranged in the combustion section 33. Due to the elevated temperature, additional moisture can be added to the warm air flow WLS, particularly without causing hygiene problems. Additionally or alternatively, the humidification device 14 can be arranged in the collection section 6, particularly before the warm air flow WLS merges with the fresh air flow FLS.

[0074] The catalytic unit 5 additionally or alternatively comprises an additional heater 24, in particular an electric one, for heating and / or drying the catalyst 23. Accordingly, when the ventilation heating device 1 is started, moisture deposits may be present on the, in particular hydrophilic, catalyst 23, which may hinder a reliable start of the flameless catalytic combustion. With the additional heater 24, the catalyst 23 can be heated and / or dried before and / or during the start-up process, so that the catalytic unit 5 can be started reliably. The additional heater 24 can, as shown, be designed as a jacket heater. In this case, the additional heater 24 or an annular heating element of the additional heater 24 is located outside the combustion section 33. The jacket heater is then arranged on the outer circumference of the combustion section 33 in the region of the catalyst 23.As a result, the catalyst 23 is heated by the auxiliary heater 24 indirectly via the housing of the combustion section 33.

[0075] To monitor the starting process and / or the flameless catalytic combustion, the catalytic unit 5 comprises the temperature sensor 26, which is arranged in the combustion section 33, in the region of the combustion section 33, and / or in the collection section 6. The temperature sensor 26 is preferably arranged in the second subsection, as shown in Figure 1. In addition to the temperature sensor 26, a humidity sensor 31 can be arranged within the combustion section 33, as shown in the illustrated embodiment. The temperature sensor 26 and the humidity sensor 31 can be configured as a single sensor unit.

[0076] In order to keep the design complexity of the ventilation heating device 1, in particular of the catalysis unit 5, to a minimum, the mixing section 25, the sensor section 34 and / or the combustion section 33 are designed as a tube. To ensure simple maintenance and repair, the tube comprises a plurality of tube elements, wherein the mixing section 25 is arranged in a first tube element, the sensor section 34 in a second tube element and / or the combustion section 33 in a third tube element. The individual tube elements can be connected to one another by means of connecting regions, preferably designed as flanges. In order to utilize the waste heat from the space 16, the ventilation heating device 1 can comprise a heat exchanger 17, as shown in the exemplary embodiment shown, and / or the heat exchanger 17 can be connected upstream of the ventilation heating device 1.The heat exchanger 17 is preferably an air / air heat exchanger and / or a cross-flow heat exchanger, wherein the heat exchanger 17 in the embodiment shown is operatively connected to the distributor section 10 via an air supply connection 18.

[0077] The heat exchanger 17 comprises the supply air connection 18 for the distribution section 10, an exhaust air connection 19 for the room 16, an outside air connection 20, and an exhaust air connection 21. The heat exchanger 17 is preferably designed such that an outside air flow OUT flowing in through the outside air connection 20 is heated in the heat exchanger 17 to the air flow LS flowing out through the supply air connection 18. Additionally or alternatively, an exhaust air flow ABS flowing in through the exhaust air connection 19 is cooled in the heat exchanger 17 to an exhaust air flow FOS flowing out through the exhaust air connection 21.

[0078] For control purposes, the ventilation heating device 1 has a control device 28. Among other things, the catalytic unit 5 can be controlled by means of the control device 28. By means of at least one data interface 29 and / or at least one control line 36 connected to the data interface 29, the control device 28 can be operatively connected to the temperature sensor 26 and / or to the humidity sensor 31 in the combustion section 33 and / or to the auxiliary heater 24 on the catalytic converter 23 and / or to the humidification device 14. Additionally or alternatively, the control device 28 can be operatively connected by means of the data interface 29 and / or the control line 36 to a hydrogen valve 30, which controls the amount of hydrogen flowing through the hydrogen supply line 35. In the exemplary embodiment shown, the main fan 13 is arranged upstream of the heat exchanger 17 and / or at the outside air connection 20.Additionally or alternatively, the main fan 13 can be arranged downstream of the heat exchanger 17 and / or upstream of the distribution section 10 of the ventilation heating device 1. Furthermore, the air inlet 3 of the air duct system 2 is arranged on the distribution section 10 in the illustrated embodiment. Additionally or alternatively, the heat exchanger 17 can be a component of the air duct system 2, so that the air inlet 3 can be arranged at the outside air connection 20 of the heat exchanger 17.

[0079] Using the data transmitted from the temperature sensor 26 of the catalytic unit 5 to the control device 28, the control device 28 can prevent ignition of the air-hydrogen mixture and / or an explosion, in particular by regulating the auxiliary heater 24 and / or the hydrogen valve 30. As mentioned above, the mixing section 25 is regulated and / or controlled, in particular via the hydrogen valve 30 and / or by the control device 28. For this purpose, the mixing section 25 comprises the inlet opening for the first partial air flow TL1, the hydrogen supply line 35 for hydrogen, and / or the mixture outlet. The air-hydrogen mixture is fed to the sensor section 34 via the mixture outlet. To control the first partial air flow TL1 and / or the second partial air flow TL2, the warm air control element 11, the fresh air control element 12 and / or the main fan 13 can also be operatively connected to the control device 28.

[0080] Additionally or alternatively, the ventilation heating device 1 in the illustrated embodiment comprises further temperature sensors 26 and humidity sensors 31. By way of example, a temperature sensor 26 and a humidity sensor 31 are each arranged in the region of the exhaust air connection 19 of the room 16, at the outside air connection 20 of the heat exchanger 17, in the distributor section 10 and / or in the region of the supply air connection 18 of the room 16. It is also conceivable that at least one of the temperature sensors 26 and / or one of the humidity sensors 31 is omitted in alternative embodiments of the ventilation heating device 1. Furthermore, it is conceivable that at least one further or additional temperature sensor 26 and / or humidity sensor 31 is mounted in or on the ventilation heating device 1, on the heat exchanger 17 and / or in the room 16.

[0081] In addition, in the illustrated embodiment, the room 16 has a room air sensor 32. The room air sensor 32 can, for example, sense the temperature and / or humidity within the room 16. It is also conceivable for the room air sensor 32 to specify a target temperature and / or a target humidity for the room 16 and / or to include an input device for manually entering the target temperature and / or the target humidity. The temperature sensors 26, humidity sensors 31 and / or the room air sensor 32 are operatively connected to the control device 28 via the at least one data interface 29 and / or the at least one control line 36. Additionally or alternatively, the heat exchanger 17 is also operatively connected to the control device 28.

[0082] By means of the control device 28, the ventilation heating device 1 can be adjusted between a heating position, an air exchange position, and / or a mixing position. In the heating position of the ventilation heating device 1, the air flow LS is completely heated to the warm air flow WLS and / or the air flow LS completely transitions into the first partial air flow TL1. In this case, the control device 28 controls at least one of the control elements 11, 12, 13, in particular the fresh air control element 12, such that no fresh air flow FLS flows into the collection section 6. The warm air control element 11 can be controlled in the heating position such that the target temperature and / or target humidity in the room 16 is reached. This can preferably ensure maximum heating and / or humidification of the room 16 with the lowest possible air exchange.In addition, in the heating position, the hydrogen supply can be controlled by means of the hydrogen valve 30 and / or the moisture input can be controlled by means of the humidification device 14, so that an exact control of the temperature and / or (air) humidity in the room 16 can be ensured.

[0083] In the air exchange position of the ventilation heating device 1, the air flow LS completely transitions into the second partial air flow TL2. The control device 28 controls at least one of the control elements 11, 12, 13, in particular the warm air control element 11, such that no warm air flow WLS flows into the collecting section 6. The fresh air control element 12 can be controlled in the air exchange position such that the desired air exchange is ensured. Additionally or alternatively, the hydrogen valve 30, the auxiliary heater 24, and / or the humidification device 14 can be closed and / or switched off in the air exchange position of the ventilation heating device 1. The main fan 13 and / or the fresh air control element 12 controls the flow rate of the fresh air flow FLS and thus the rate of air exchange in the room 16.

[0084] In the mixed position of the ventilation heating device 1, the air flow LS is split into the first partial air flow TL1 and the second partial air flow TL2. Thus, both the warm air flow WLS and the fresh air flow FLS flow into the collection section 6 and are combined there to form the supply air flow ZUS for the room 16. The first partial air flow TL1 and / or the warm air flow WLS flows through the catalytic unit 5, and the second partial air flow TL2 and / or the fresh air flow FLS flows through the optional bypass duct 9. The temperature and / or humidity of the supply air flow ZUS can be controlled and / or adjusted by means of the warm air control element 11, the fresh air control element 12, the hydrogen valve 30, and / or the humidification device 14.By means of the information from the heat exchanger 17, the temperature sensors 26, the humidity sensors 31 and / or the room air sensor 32, the target temperature and / or the target humidity of the supply air flow ZUS and / or the air in the room 16 can be set.

[0085] In addition, the air duct system 2 has at least one air purification device 39, in particular designed as an air filter, wherein the air purification device 39 is preferably arranged in the region of the air inlet 3 and / or the air outlet 4. Thus, the outside air flow OUT, the air flow LS and / or the supply air flow ZUL can be cleaned, in particular filtered.

[0086] Figure 2 shows a highly simplified schematic sectional view of a ventilation heating device 1 for heating an air flow LS according to an alternative embodiment. Similar to the embodiment of Figure 1, the ventilation heating device 1 shown here can also be arranged, for example, outside a building or, for example, in a utility room within the building. The ventilation heating device 1 shown here can also be integrated into an existing ventilation system of a building.

[0087] Similar to the exemplary embodiment in Figure 1, in the exemplary embodiment in Figure 2, the ventilation heating device 1 also has the air guidance system 2 with at least one air inlet 3 and at least one air outlet 4. A catalytic unit 5 for the flameless combustion of hydrogen, which is arranged between the air inlet 3 and the air outlet 4, is also shown. In contrast to the exemplary embodiment in Figure 1, in the exemplary embodiment in Figure 2, the collecting section 6 is designed as a collecting chamber and / or the distributor section 10 is designed as a distributor chamber.

[0088] The ventilation heating device 1 shown here can, for example, be connected to a heat exchanger 17 according to Figure 1 at the air inlet 3. It is also conceivable that the exhaust air flow ABS from the room 16 or the outside air flow OUT is drawn into the air duct system 2 at the air inlet 3. The air outlet 4 can be arranged directly or indirectly at the room 16, so that the supply air flow ZUS can be introduced into the room 16.

[0089] The embodiment of Figure 2 shows an external pipe that can be referred to as an air duct system 2. The catalytic unit 5 is preferably arranged concentrically within the air duct system 2. In the illustrated embodiment, an annular bypass duct 9 is formed around the catalytic unit 5. The fresh air control element 12 is designed as an annular fresh air fan. The warm air control element 11 is arranged within the guide duct 22 of the catalytic unit 5 and thus accelerates the warm air flow WLS and / or the first partial air flow TL1.

[0090] Additionally, in the embodiment of Figure 2, the catalyst 23 is formed with a base body 37 and tubular and / or honeycomb-shaped reaction channels 38. The base body 37 is preferably formed from a monolith and / or ceramic and / or has a metal oxide coating to increase the surface area and / or a platinum, rhodium, iridium, and / or palladium coating as a catalytically active layer. Alternatively, the catalyst 23 can be designed similarly to the embodiment of Figure 1. Additionally or alternatively, the catalyst 23 of Figure 1 can be designed correspondingly to the catalyst 23 of Figure 2.

[0091] For a simple and cost-effective design of the catalytic unit 5, an exhaust gas catalytic converter of a vehicle, in particular a motor vehicle, can be installed as the catalytic converter 23. Corresponding exhaust gas catalytic converters can be ordered, for example, as spare parts and can be used in the catalytic unit 5. In the exemplary embodiment in Figure 2, no control device 28 is shown for the sake of simplicity. It is conceivable that a control device 28 is operatively connected, in particular by means of the control lines 36, to the temperature sensors 26, humidity sensors 31, control elements 11, 12, 13 and / or the hydrogen valve 30 shown in Figure 2. The regulation and / or control can be carried out according to the method described above.

[0092] The present invention is not limited to the illustrated and described embodiments. Modifications within the scope of the patent claims are possible, as are combinations of features, even if they are illustrated and described in different embodiments.

[0093] List of reference symbols

[0094] 1 ventilation heater

[0095] 2 Air duct system

[0096] 3 Air intake

[0097] 4 Air outlet

[0098] 5 Catalysis unit

[0099] 6 Collection section

[0100] 7 Warm air inlet

[0101] 8 Fresh air intake

[0102] 9 Bypass channel

[0103] 10 Distribution section

[0104] 11 Warm air control element

[0105] 12 Fresh air control element

[0106] 13 Main fan

[0107] 14 Humidification device

[0108] 15 Supply air duct

[0109] 16 rooms

[0110] 17 heat exchangers

[0111] 18 Supply air connection

[0112] 19 Exhaust air connection

[0113] 20 outside air connection

[0114] 21 Exhaust air connection

[0115] 22 guide channel

[0116] 23 Catalyst

[0117] 24 additional heating

[0118] 25 Mixing section

[0119] 26 Temperature sensor

[0120] 27 Gas sensor

[0121] 28 Control device

[0122] 29 Data interface 30 Hydrogen valve

[0123] 31 Humidity sensor

[0124] 32 room air sensor

[0125] 33 Combustion section

[0126] 34 Sensor section

[0127] 35 Hydrogen supply line

[0128] 36 Control line

[0129] 37 basic bodies

[0130] 38 reaction channels

[0131] 39 Air purification device

[0132] LS airflow

[0133] WLS warm air flow

[0134] FLS fresh air flow

[0135] TL1 first partial air flow

[0136] TL2 second partial air flow

[0137] ZUS supply air flow

[0138] OFF outside air flow

[0139] ABS exhaust air flow

[0140] FOS exhaust air flow

Claims

Patent claims Ventilation heating device (1) for heating an air flow (LS), with an air guidance system (2) which comprises at least one air inlet (3) and an air outlet (4) arranged downstream along an intended flow direction of the air flow (LS), and with at least one catalytic unit (5) for the flameless combustion of hydrogen, which is arranged in the air guidance system (2) between the air inlet (3) and the air outlet (4), so that at least a part of the air flow (LS) can be guided through the catalytic unit (5) and heated to a warm air flow (WLS), characterized in that the air guidance system (2) has a collecting section (6) arranged downstream of the catalytic unit (5) in the flow direction, in which collecting section the warm air flow (WLS) of the catalytic unit (5) can be combined with a fresh air flow (FLS).Ventilation heating device (1) according to the preceding claim, characterized in that the collecting section (6) comprises a warm air inlet (7) for the warm air flow (WLS) and a fresh air inlet (8) for the fresh air flow (FLS), so that the warm air flow (WLS) and / or the fresh air flow (FLS) is collected and / or mixed in the collecting section (6). Ventilation heating device (1) according to one of the preceding claims, characterized in that the at least one air outlet (4) is located on the collecting section (6). is arranged and / or is arranged downstream of the collecting section (6) in the flow direction. Ventilation heating device (1) according to one of the preceding claims, characterized in that the air duct system (2) comprises at least one bypass duct (9) for providing the fresh air flow (FLS), wherein the bypass duct (9) preferably connects the air inlet (3) and the fresh air inlet (8) of the collecting section (6). Ventilation heating device (1) according to one of the preceding claims, characterized in that the bypass duct (9) and the catalytic unit (5) are connected in parallel to one another. Ventilation heating device (1) according to one of the preceding claims, characterized in that the air duct system (2) comprises at least one distributor section (10), wherein the distributor section (10) preferably comprises the air inlet (3) and / or is arranged downstream of the at least one air inlet (3) in the flow direction. Ventilation heating device (1) according to one of the preceding claims, characterized in that the distributor section (10) is arranged upstream of the catalytic unit (5) and / or the bypass duct (9), so that the air flow (LS) can be divided by the distributor section (10) into a first partial air flow (TL1) for the warm air flow (WLS) and / or a second partial air flow (TL2) for the fresh air flow (FLS). Ventilation heating device (1) according to one of the preceding claims, characterized in that the collecting section (6) is designed as a collector, in particular as a Y-collector, T-collector and / or collecting box, and / or the distributor section (10) is designed as a distributor, in particular as a Y-distributor, T-distributor and / or distributor box. Ventilation heating device (1) according to one of the preceding claims, characterized in that the ventilation heating device (1) comprises at least one control element (11, 12, 13), in particular a warm air control element (11), a fresh air control element (12) and / or a main fan (13), for controlling the flow velocity of the air flow (LS), the first partial air flow (TL1) and / or the second partial air flow (TL2).Ventilation heating device (1) according to one of the preceding claims, characterized in that the warm air control element (11), in particular a warm air fan, is designed to control the flow velocity of the first partial air flow (TL1) for the warm air flow (WLS) and / or the fresh air control element (12), in particular a fresh air fan, is designed to control the flow velocity of the second partial air flow (TL2) for the fresh air flow (FLS). Ventilation heating device (1) according to one of the preceding claims, characterized in that the warm air control element (11) is arranged between the distributor section (10) and the catalytic unit (5) and / or in the region of the catalytic unit (5) and / or between the catalytic unit (5) and the collecting section (6) and / or the fresh air control element (12) is arranged between the distributor section (10) and the bypass channel (9) and / or in the region of the bypass channel (9). and / or is arranged between the bypass duct (9) and the collecting section (6). Ventilation heating device (1) according to one of the preceding claims, characterized in that the ventilation heating device (1) comprises at least one main fan (13) for accelerating the air flow (LS) along the flow direction, wherein the distributor section (10) is preferably arranged downstream of the main fan (13) in the flow direction. Ventilation heating device (1) according to one of the preceding claims, characterized in that the catalysis unit (5) and / or the collecting section (6) comprises at least one humidification device (14) for humidifying the warm air flow. Ventilation heating device (1) according to one of the preceding claims, characterized in that an air supply duct (15) for providing an air supply flow (ZUS) for a room (16) is arranged downstream of the collecting section (6) in the flow direction.Ventilation heating device (1) according to one of the preceding claims, characterized in that the ventilation heating device (1) has at least one heat exchanger (17), in particular an air / air heat exchanger, wherein the heat exchanger (17) is operatively connected to the distributor section (10) via an air supply connection (18) and / or the distributor section (10) is preferably arranged downstream of the heat exchanger (17) in the flow direction. Ventilation heating device (1) according to one of the preceding claims, characterized in that the heat exchanger (17) comprises the supply air connection (18) for the distributor section (10), an exhaust air connection (19) for the room (16), an outside air connection (20) and an exhaust air connection (21), wherein the heat exchanger (17) is preferably designed such that an outside air flow (AUS) flowing in through the outside air connection (20) is heated in the heat exchanger (17) to the air flow (LS) flowing out through the supply air connection (18) and that an exhaust air flow (ABS) flowing in through the exhaust air connection (19) is cooled in the heat exchanger (17) to an exhaust air flow (FOS) flowing out through the exhaust air connection (21).Ventilation heating device (1) according to one of the preceding claims, characterized in that the catalysis unit (5), the collecting section (6), the distribution section (10), the bypass channel (9), the heat exchanger (17), the at least one control element (11, 12, 13), the supply air channel (15), the air inlet (3), and / or the air outlet (4) are operatively connected. Ventilation heating device (1) according to one of the preceding claims, characterized in that the catalysis unit (5) comprises at least one guide channel (22), at least one catalyst (23), an additional electric heater (24), a mixing section (25), a temperature sensor (26), a humidity sensor (31), and / or a gas sensor (27).Ventilation heating device (1) according to one of the preceding claims, characterized in that the ventilation heating device (1) comprises at least one control device (28) with at least one data interface (29), wherein the ventilation heating device (1) is controlled by means of the control device. (28) is preferably adjustable between a heating position, an air exchange position and / or a mixing position. Ventilation heating device (1) according to one of the preceding claims, characterized in that the temperature sensor (26), the gas sensor (27), at least one of the control elements (11, 12, 13), the humidification device (14), the additional heater (24), a hydrogen valve (30), the humidity sensor (31) and / or a room air sensor (32) are operatively connected to the data interface (29) of the control device (28). Ventilation heating device (1) according to one of the preceding claims, characterized in that the catalyst (23) comprises a base body (37) with tubular and / or honeycomb-shaped reaction channels (38), wherein the base body (37) is preferably formed from monolith and / or ceramic, in particular from cordierite and / or AlMg silicate.Ventilation heating device (1) according to one of the preceding claims, characterized in that the catalyst (23) comprises a metal oxide coating to increase the surface area and / or a platinum, rhodium, iridium, and / or palladium coating as a catalytically active layer. Ventilation heating device (1) according to one of the preceding claims, characterized in that the air guidance system (2) comprises at least one air purification device (39), in particular designed as an air filter, wherein the air purification device (39) is preferably arranged in the region of the air inlet (3) and / or the air outlet (4). Method for operating a ventilation heating device (1), preferably a ventilation heating device (1) according to one or more of the preceding claims, in which an air flow (LS) is provided at an air inlet (3) of an air guidance system (2), wherein at least a first partial air flow (TL1) of the air flow (LS) is heated to a warm air flow (WLS), and / or at least a second partial air flow (TL2) of the air flow (LS) is provided as a fresh air flow (FLS), characterized in that the ventilation heating device (1) is adjustable between a heating position, an air exchange position and / or a mixing position.Method according to the preceding claim, characterized in that the air flow (LS) in the heating position of the ventilation heating device (1) is completely heated to the warm air flow (WLS) and / or the air flow (LS) completely changes over into the first partial air flow (TL1), the air flow (LS) in the air exchange position of the ventilation heating device (1) completely changes over into the second partial air flow (TL2), and / or the air flow (LS) in the mixing position of the ventilation heating device (1) is divided into the first partial air flow (TL1) and the second partial air flow (TL2).

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