ROAD CONSTRUCTION MACHINE WITH SEAT CONSOLE FOR FRESH AIR SUPPLY AND METHOD

Description

[0001] The present invention relates to a road construction machine with a seat console for fresh air supply and to a method for generating a fresh air flow by means of a seat console of a road construction machine.

[0002] Currently, so-called ventilation systems are used on road pavers. Their basic function is to extract bitumen and oil-containing vapors from above the auger chamber. The extracted vapors are then routed away from the operator's work area by means of a fan and a hose system. Such a ventilation system is disclosed, for example, in DE 10 2012 011 693 A1. However, such an extraction system takes up a considerable amount of space on the road paver and sometimes obstructs the operator's view to the rear of the screed.

[0003] US 6,290,286 B1 discloses an excavator with an enclosed operator's cab. Inside the enclosed cab, behind a driver's seat on the cab floor, an air conditioning unit is installed, from which air supply lines lead to a control panel positioned in front of the driver's seat.

[0004] WO 2022 / 044586 A1 discloses a spectator seat or an aircraft seat with an air barrier device installed on the headrest, suitable for supplying fresh air. This is primarily intended to prevent the spread of bacteria and viruses in enclosed spaces.

[0005] EP 3 636 466 A1 discloses an air purification device for attachment to a vehicle seat installed in the vehicle interior.

[0006] EP 4 092 191 A1 discloses a road paver or a feeder vehicle for a road paver with an air barrier device. The air barrier device can have nozzles on a seat console of the operator's station to generate an air curtain in the area of ​​the operator in order to keep aerosols and / or vapors away from the operator. The air barrier device can be operated by means of a fan used in the engine compartment for cooling the engine or by means of a filter unit installed therein.

[0007] The object of the invention is to improve the air quality for operators of a road construction machine exposed to bitumen-containing fumes during operation by means of simple, constructive means.

[0008] This problem is solved using a road construction machine according to claim 1. Furthermore, this problem is solved using a method for generating a fresh air flow according to claim 20.

[0009] Advantageous further developments of the invention are given by the subject matter of the dependent claims.

[0010] The invention relates to a road construction machine in the form of a road paver or a feeder vehicle for a road paver. The road construction machine according to the invention comprises a driver's control station, open at least on one side, for a driver of the road construction machine. This driver's control station has at least one seat console which, according to the invention, includes a fresh air system.

[0011] Due to their inherently open design, the operator's platform on road pavers or material handling vehicles is generally well-ventilated. Nevertheless, it is possible for bitumen-containing fumes from the material hopper or auger chamber to enter the operator's platform through the open sides. Common extraction systems used on road pavers attempt to capture these fumes directly at their source and expel them in an area above the work area, for example, above the roof of the operator's platform.

[0012] The invention differs from this previous, typical approach in that the improvement of air quality occurs directly at the operator's workstation via the fresh air system provided at the seat console. This allows for the creation of fresh air enrichment in the immediate vicinity of the operator on the seat console. The operator thus sits directly in an open, fresh air atmosphere, which, however, prevents any vapors originating outside from reaching the operator, if they reach them at all, only to a very limited extent. Even vapors rising from the material hopper area or the auger chamber into the open operator's station can be neutralized by the fresh air system directly adjacent to the operator on the seat console, i.e., reduced to a concentration level that is not critical for the operator.

[0013] The fresh air system according to the invention thus creates a protective atmosphere of fresh air for the operator in an open working environment by supplying the operator with fresh air from close proximity, i.e., directly at the seat console, in addition to the fresh air supply provided via the open side(s) of the operator's station. This significantly improves the working conditions for the operator located on the seat console. By means of this additional fresh air supply provided at the open operator's station by the fresh air system according to the invention, the legally required limits for air conditions can be reliably met on appropriately equipped road pavers or material handling vehicles.

[0014] Because the fresh air system according to the invention is arranged directly on the seat console of the road construction machine, it takes up little space. This means that the daily work processes taking place on the road construction machine are not disrupted. The fresh air system installed on the seat console according to the invention is easy to operate and inexpensive to manufacture.

[0015] One advantageous design provides for a seat console with a base, preferably one that is pivotable and / or slidable, to the underside of which at least one fan unit of the fresh air system is attached. In this position, the fan unit is well protected. Furthermore, the operator on the seat console perceives very little operating noise from the fan unit, as the base acts as an excellent noise barrier. This ensures quiet operation of the fresh air system, even at high fan speeds. Additionally, when the base is pivoted, the fan unit is positioned on the underside of the console, extending beyond the driver's operating platform, thus providing easy access from below, for example, for maintenance work.

[0016] One option involves installing the fan unit on the seat console, but in a different location, for example behind a (driver's) seat of the seat console, especially behind a backrest.

[0017] An advantageous embodiment provides that the fan unit is housed within a step created by the console base. This step provides a sufficiently large mounting space for the fan unit. Furthermore, it allows for the convenient integration of other components of the fresh air system, such as a dedicated filter unit. The fresh air system components housed below in the step are tidily arranged from a technical standpoint, as they do not create tripping hazards on the console base.

[0018] According to one embodiment of the invention, the fan unit is configured for the removable or fixed attachment of a filter unit. With a removable attachment, the filter unit can be detached from the fan unit while the fan unit remains on the seat console. This allows the filter unit to be easily replaced.

[0019] It would be advantageous for the fan unit to include at least one electrically, hydraulically, or pneumatically operated fan. An electric fan could, for example, be connected to a power supply cable routed along the underside of the console base. A hydraulic or pneumatic fan could, for example, be connected to a hydraulic or pneumatic system routed along the underside of the console base.

[0020] Specifically, the fan is either a radial or an axial fan. A radial fan, in particular, can have a low profile, allowing for compact mounting beneath the console base. Furthermore, a radial fan is advantageous for supplying fresh air to the seat console from both sides.

[0021] It would be conceivable for the fan unit to include several fans that can be controlled in parallel, in particular two fans mounted on the underside of the console base, each supplying fresh air in separate air streams. The operation of each fan could then be controlled independently, for example, to selectively generate fresh air in different areas of the seat console, possibly at varying intensities. Furthermore, the use of multiple fans would ensure low-speed, and therefore quieter, operation, while still providing a high level of fresh air supply despite the low speed.

[0022] According to one embodiment of the invention, the fresh air system comprises at least one filter unit arranged on an intake side and / or an exhaust side of the fan unit. If the filter unit is arranged on the intake side, the fan can be protected from contamination. In this variant, the fan creates a negative pressure and draws in the ambient air cleaned by the filter unit, so that filtered fresh air exits from its exhaust side. If the filter unit is arranged on the exhaust side, the fan forces unfiltered ambient air through the filter unit positioned at its outlet. If a filter unit is arranged on both the intake side and the exhaust side, the filtered air drawn in by the fan unit can be filtered again on the exhaust side.

[0023] Preferably, the filter unit is located together with the fan unit below the console base, or together with the fan unit at another location on the seat console, for example, behind a seat backrest. The filter unit is well protected, especially under the console base, and is easily accessible from below when the console base is swung out, thus allowing for easy replacement. Furthermore, when the filter and fan units are located below the console base, they do not create tripping hazards on the console base, i.e., in the operator's area.

[0024] For servicing purposes, it would be particularly useful if the filter unit and the fan unit were separate, connectable modules, i.e., not housed in a common casing. This would allow the filter unit to be detached from the fan unit without having to disassemble any parts of the fan unit's casing.

[0025] It would be conceivable for the filter unit to be configured as a clip-on module for tool-free attachment to the fan unit. In particular, the filter unit is a self-contained, stable filter assembly comprised of several filter elements, eliminating the need for a separate filter housing. This reduces cleaning effort on the construction site. For example, the filter unit could consist of two permanently bonded filter elements, especially two activated carbon filters glued together, and a pre-filter attached to the two filter elements, particularly a foam or fleece filter. These interconnected filter elements, including the pre-filter, can be installed and removed as a single unit.

[0026] Ideally, the fresh air system should have at least one nozzle unit that can be positioned next to either the headrest or the backrest of the seat console. This would allow the operator to position the nozzle unit as needed. Specifically, the fresh air system should include a bracket that extends at least partially to the side of the headrest and to the side of the backrest, allowing the nozzle unit to be attached to the bracket in various positions to be positioned either next to the headrest or the backrest. Alternatively, the nozzle unit could also be installed in a fixed location.

[0027] According to one embodiment, the fresh air system includes at least one additional fresh air nozzle unit that can be positioned laterally on the seat base of the seat console in various positions. This allows the nozzle unit to be positioned further forward or backward when the seat base is adjusted longitudinally. Alternatively, the additional nozzle unit could also be installed in a fixed location.

[0028] The positions of the nozzle units can be determined in particular by screwing them on and off, by moving them and / or by magnetic holders.

[0029] It would be conceivable for the nozzle unit and the additional nozzle unit to be operated together or individually for fresh air supply. The fresh air system could be equipped with a valve unit for this purpose.

[0030] One option involves the fresh air system having the nozzle units described in the two preceding paragraphs on both sides of the seat console. This allows the operator to be supplied with fresh air on either side of the seat console.

[0031] One variant provides that the nozzle unit, i.e., at least one of the nozzle units described above, has at least one fresh air opening with adjustable louvers.

[0032] This allows the direction of the fresh air flow to be determined. The operator can thus specifically adjust the direction of the fresh air flow.

[0033] According to one embodiment of the invention, the nozzle unit, i.e., at least one of the nozzle units described above, has at least one fresh air opening for a fresh air outlet flow, for example, a circular air opening, as well as at least one nozzle for a desired other outlet flow, for example, a flat nozzle or fan nozzle, for forming an air barrier. It would be conceivable to use one fan unit to create the fresh air outlet flow and a separate fan unit to create the air barrier. The two fan units can optionally be controlled independently of each other at different speeds. This also makes it possible to set different flow velocities at different points on the seat console.

[0034] In particular, the nozzle for forming the air barrier can be adjusted to retain the fresh air atmosphere in the operator's area for a longer period. For example, the air barrier could be positioned outside the fresh air outlet flow closest to the operator, so that the fresh air outlet flow created at the operator's location does not spread outwards but remains concentrated in the operator's area. The air barrier thus acts as an auxiliary flow to advantageously maintain the fresh air atmosphere in the operator's area. The fresh air flow from the seat console and / or a fresh air flow from the control panel can be introduced into the air barrier in such a way that it specifically enriches the atmosphere with fresh air in the operator's area.Furthermore, the air barrier formed at the seat console shields the operator from bitumen-containing fumes that may enter the driver's control station from the outside.

[0035] Preferably, at least one, and in particular several, air ducts or fresh air lines lead away from the fan unit to supply at least one nozzle unit with fresh air. For example, two air ducts or fresh air lines could lead radially away from a radial fan, and in particular be positioned opposite each other on the radial fan, to supply nozzle units on both sides of the seat console with fresh air. The fan unit can thus be used as a central fresh air supplier for several nozzle units positioned on both sides of the seat console.

[0036] In particular, the nozzle unit is adjustable, for example, by being swivelled. For instance, a nozzle unit mounted next to the headrest can be swivelled downwards or upwards depending on how far the headrest is extended or retracted on the backrest, in order to effectively supply the operator in the seat with fresh air.

[0037] According to an advantageous embodiment, the fresh air system provided at the seat console can be used in conjunction with another fresh air system located at a control panel of the driver's station. The two fresh air systems can complement each other in such a way that together they create a larger area with a desired fresh air atmosphere on the driver's station, particularly ensuring an increased supply of fresh air in the operator's or driver's area. Specifically, the two fresh air systems can be coordinated in such a way that even when the operator leaves the fresh air zone created by the fresh air system at the seat console, they remain within a fresh air zone created on the driver's station by the other fresh air system.

[0038] It is conceivable that the two fresh air systems are configured to generate opposing, converging fresh air streams, which are at least partially surrounded by the air barrier formed by the nozzle unit on the headrest. This creates a turbulence effect in the operator's area, allowing the fresh air atmosphere to be maintained there for a longer period. Furthermore, this reduces the respective velocities of the converging fresh air streams, which is particularly noticeable and pleasant in the immediate vicinity of the operator, especially at head height. It would be conceivable that, to achieve this effect, the convergence of the fresh air streams could be set at a predetermined height in front of the operator.

[0039] One option involves configuring the fresh air system of the seat console and / or the fresh air system of the control panel to regulate the temperature of the fresh air flow. This allows for the creation of a fresh air atmosphere at a desired temperature for the operator or driver. Furthermore, depending on temperature differences in the fresh air flows, thermal flow effects can be used to selectively enrich the fresh air in the operator or driver's area.

[0040] It would be possible for the seat console to be a swiveling, rotatable and / or laterally movable driver's seat console mounted on the driver's control panel, with the fresh air system provided on it being able to follow these movements.

[0041] It would be conceivable to vary the volume of fresh air flowing from the fresh air system by adjusting the speed of the fan unit. This would, for example, allow the fresh air supply to be increased when a particularly high amount of steam is generated at the road construction machine, such as during the material transfer process of paving material into the machine's material hopper. Such speed adjustment could be automatic or manually controlled.

[0042] It would be conceivable that at least one control element for adjusting the speed of the fan unit could be provided directly on the seat console, particularly directly on the fresh air system, on a control panel of the operator's station, and / or on a separate external control station of the road construction machine. In the latter case, if a screed operator on the paver notices a high level of steam generation during paving, they could increase the fresh air supply accordingly for their colleague on the operator's station.

[0043] The control element could, for example, be in the form of a rotary knob. One alternative involves using a touch display as the control element, specifically a touch display integrated into the driver's control panel.

[0044] Preferably, the fresh air system is designed as a hang-on unit for the seat console, allowing for easy retrofitting to existing seat consoles. One option involves integrating the fresh air system directly into the seat console, resulting in a particularly compact design. Especially with a hang-on unit, it would be conceivable for the control element, such as a rotary knob, to be integrated directly into the fan unit.

[0045] One option is to mount the seat console on either side of the driver's control panel. It would be conceivable to have two seat consoles installed on the control panel. An advantageous feature is the integration of sensors on the control panel to detect which of the two seat consoles is occupied by an operator or driver. Based on sensor readings, the fresh air system of the occupied seat console could be automatically activated, and the fresh air system of the unoccupied seat console could be automatically deactivated. This allows for an automatic response to changes in seating position.

[0046] The invention further relates to a method for generating a fresh air flow by means of a seat console in a laterally open operator's station of a road construction machine, which is either a road paver or a feeder vehicle for a road paver. The laterally open operator's station already ensures that the area on the operator's station is ventilated with ambient air and can therefore be additionally supplied with filtered fresh air via the seat console. This allows the fresh air atmosphere of the operator's station of a road paver or a feeder vehicle, which is already ventilated with ambient air from the sides, to be further improved by the fresh air supply via the seat console, specifically in the immediate vicinity of the operator or driver positioned on the seat console.This means that in the invention, the ventilated atmosphere created by the open design of the driver's control station in the operator's area is specifically improved in terms of air quality by the seat console, i.e., a fresh air system integrated therein.

[0047] Preferably, ambient air is drawn in and filtered from below a console base of the seat console, which is preferably pivotally mounted, and then transported as fresh air to several nozzle units arranged around a seat of the console. Drawing in and filtering ambient air from below the console base ensures quiet operation of the fresh air system and also allows for a compact design.

[0048] It would be conceivable that the fresh air system could generate fresh air currents both to the side of a headrest and to the side of the seat base of the (driver's) seat, especially on both sides of the seat console, so that an operator or driver sitting on the seat console can be supplied with fresh air from several directions.

[0049] One embodiment provides that the fresh air system integrated into the seat console is used to generate at least one fresh air flow with a first velocity and a second (fresh) air flow with a higher velocity than the first. In particular, the (fresh) air flow with the second velocity can be generated in the form of an air barrier. It would be conceivable for the air barrier to be created in the form of an air tunnel that surrounds the fresh air flow, at least in certain areas.

[0050] It would be conceivable for a fresh air system located at the seat console to generate fresh air to interact with another fresh air system at the driver's control station to increase the amount of fresh air in the seat console area. It would also be conceivable for the seat console's fresh air system to operate in conjunction with a fresh air system located at the driver's control station to create opposing, converging fresh air flows. These flows would produce beneficial turbulence effects, thus maintaining a fresh air atmosphere in the operator's area for a longer period.

[0051] In particular, the fresh air volume flow of the fresh air system provided at the seat console can be regulated by adjusting the speed of the fan unit. It would be conceivable that the speed of the fan unit could be adjusted using a control element located directly at the seat console, especially directly at the fresh air system, at a control panel of the operator's station, and / or at a separate external control station of the road construction machine.

[0052] The present invention is explained in more detail with reference to the following figures. They show: Figure 1: A road construction machine in the form of a paver; Figure 2: A road construction machine in the form of a feeder vehicle for a paver; Figure 3: A front view of a seat console with a fresh air system; Figure 4: A side view of the seat console with a fresh air system. Figure 3Figure 5 is a perspective view of the seat console with fresh air system from Figures 3 and 4, Figure 6 is a front view of the fresh air system in isolated view, Figure 7 is a sectional view of the fresh air system from Figure 6 Figure 8 shows a perspective view of the fresh air system. Figure 6 Figure 9 shows another perspective view of the fresh air system. Figure 6 Figure 10 shows a seat console with a fresh air system for generating fresh air and an air barrier, and Figure 11 shows separate fresh air systems for generating converging fresh air flows.

[0053] Identical technical components are consistently marked with the same reference symbols in the figures.

[0054] Figure 1Figure 1 shows a road construction machine 1 configured as a paver 2 for producing a new paving layer 3. The paver 2 produces the new paving layer 3 in the direction of travel R at a paving speed v. For this purpose, the paver 2 uses paving material 4, which is stored in a material hopper 5 located at the front of the machine. From the material hopper 5, the stored paving material 4 is transported by means of a longitudinal conveyor (not shown) in the opposite direction of travel R to a screed 6, which is designed to compact the material 4 fed to it into the new paving layer 3.

[0055] The in Figure 1 The screed 6 shown is configured as an extendable screed. The screed 6 has a base screed 7 and lateral extension sections 8 for adjusting the desired installation width of the new layer 3.

[0056] The road paver 2 from Figure 1includes a driver control station 9 for one driver F. Figure 1 shows that the driver's control station 9 is designed to be open to the side S and to the rear, i.e., without taking countermeasures, the atmospheric conditions, i.e., the air quality, from the environment of the driver's control station 9 are essentially present.

[0057] In Figure 1 The driver F sits on a swiveling seat console 10, which allows him to be swiveled out over a driver control platform 11 and positioned to the side of the driver control station 9, thus giving him a good view of the area next to the paver 2. However, in this position swiveled out over the driver control platform 11, the driver F is no longer behind a windscreen 13 provided on the roof structure 12, meaning he is more exposed to fumes and / or aerosols coming from the material hopper 5 as well as from the area of ​​the screed 6.

[0058] The operator's station 9 of the asphalt paver 2 is equipped with a control panel 14 for the operator F. The control panel 14 is configured for controlling and monitoring processes that can be carried out using the asphalt paver 2. For example, the operator F can use the control panel 14 to set the speed v of the asphalt paver 2 in the direction of travel R.

[0059] Furthermore, it shows Figure 1 An external control station 15 provides a workstation for a screed operator B on the outside of the paving screed 6, enabling the operator to control and monitor processes of the road paver 2, particularly those of the paving screed 6. For this purpose, a further control panel 16 is provided at the external control station 15.

[0060] The in Figure 1The driver and external operating stations 9, 15 on the road paver 2, which are open to the surroundings, are generally well ventilated due to their open design, but are also reached by the vapors and / or aerosols generated during installation.

[0061] Figure 2 Figure 17 shows another road construction machine, configured as a feeder vehicle 18 for a road paver 2. In practice, such a feeder vehicle 18 is used to supply a road paver 2 according to... Figure 1 to supply with paving material 4. For this purpose, the feeder vehicle 18 travels in the direction of travel R in front of the road paver 2 and throws paving material 4 into the material hopper 5 of the road paver 2 following behind it by means of a conveying device 19 fitted to the feeder vehicle 18.

[0062] The feeder vehicle 18 from Figure 2It has a material bunker 20 for receiving paving material 4. The conveying device 19 extends to the material bunker 20 and can thus transport the paving material 4 stored therein from it, against the direction of travel R in the direction of the following road paver 2 and transfer it to it.

[0063] According to Figure 2 The feeder vehicle 19 has a driver's control station 21. This driver's control station 21 is also open to the sides and rear, allowing vapors and / or aerosols to reach the driver F from behind via the open sides of the driver's control station 21. A seat console 10' for the driver F and a control panel 22 for controlling and monitoring the processes carried out by the feeder vehicle 19 are mounted on the driver's control station 21. The control panel 22 is in Figure 2positioned behind a windscreen 23 of the feeder vehicle 18, it can, however, together with the seat console 10', be brought into a position next to the driver's control station 21, i.e. swivel beyond its driver's control platform.

[0064] Figure 3 Figure 1 shows the seat console 10, 10' in an isolated view. The seat console 10, 10' has a console base 25, which is pivotally mounted on the driver's control station 9, 21. The console base 25 is mounted on a swivel arm 26, the front end of which is coupled to a pivot bearing 27. A fall protection device 28 is mounted on the swivel arm 26.

[0065] The seat console 10, 10' made of Figure 3 further includes a (driver's) seat 29, which is mounted on the console base 25. The seat 29 has a headrest 30, a backrest 31 and a seat base 32. The seat base 32 is in Figure 3It is attached to the console base 25 by means of a rail device 33 and can therefore be moved to different positions on the console base 25.

[0066] At the seat console 10, 10' out Figure 3 A fresh air system 34 is provided. This is in Figure 3 The fresh air system 34 shown is configured as a hang-on device 35 for detachable attachment to the seat 29. The fresh air system 34 has a bracket 36 with mounting units 37 for detachable attachment to headrest posts 38 and with mounting units 39 for detachable attachment to seatback supports 40. Two nozzle units 41 are attached to the bracket 36. The two nozzle units 41 are positioned on either side of the headrest 30. The nozzle units 41 each have three fresh air openings 42 with adjustable louvers 43.

[0067] Furthermore, it shows Figure 3that the fresh air system 34 also has additional nozzle units 44 on both sides of the seat base 32. These additional nozzle units 44 are each supported on the console base 25 by means of further brackets 45.

[0068] Figure 4 shows a side view of seat console 10 from Figure 3 A fan unit 47 is attached to an underside 46 of the console base 25. The fan unit 47 has a fan 48 which is located in Figure 4 The fan 48 is configured as a radial fan. A filter unit 49 is arranged below the fan 48. The filter unit 49 is connected to the intake side of the fan 48. Ambient air U can be drawn in through the fan 48 and filtered through the filter unit 49, with the filtered fresh air being conveyed by the fan 48 via air ducts 50 to the respective nozzle units 41, 44.

[0069] Furthermore, it shows Figure 4, that the nozzle unit 41, positioned laterally to the headrest 30, is pivotably mounted on the bracket 36. This is shown schematically by the double arrow 51. In Figure 4 The nozzle unit 41 is attached to the bracket 36 at an upper position P1, in order to be mounted to the side of the headrest 30. Figure 4 The nozzle unit 41 can also be attached to the bracket 36 in a lower position P2, in order to be positioned to the side of the backrest 31.

[0070] Furthermore, it shows Figure 4 The nozzle unit 44, positioned laterally to the seat base 32, is mounted on the bracket 45 in a forward position P3. The nozzle unit 44 can also be attached to the bracket 45 in a rear position P4. This allows the nozzle unit 44 to be positioned according to the position to which the seat 29 is adjusted by means of the rail arrangement 33.

[0071] The positioning options described with regard to positions P1, P2, P3, P4 are in Figure 4 The nozzle units 41, 44 shown are also provided in a comparable manner on the other side of the seat console 10, 10'.

[0072] A quick-release fastener 52 is provided for the filter unit 49 to be detachably attached to the fan unit 47. It would also be possible for the filter unit 49 to be simply attached to an intake opening of the fan unit 47 by means of a positive and / or force-fit connection.

[0073] Figure 4 This shows that both the fan unit 47 and the attached filter unit 49 are housed within a step 53 created by the console base 25. The fan unit 47 and the filter unit 49 are thus well protected and, in particular, easily accessible from below when the seat console 10, 10' is in the swung-out position according to Figure 1 is positioned.

[0074] Figure 5 Figure 1 shows a perspective view of the seat console 10. The nozzle units 41 and 44 are supplied with filtered fresh air from the fan unit 47 via the air ducts 50. The air ducts 50 are connected to each other via a Y-piece 54.

[0075] Figure 6 The figure shows the fresh air system 34 in an isolated representation. The in Figure 6 The fresh air system 34 shown is available as a hang-on unit 35 and can be easily retrofitted to existing seat consoles 10, 10'.

[0076] Figure 7 shows a cross-sectional view of the fresh air system 34 from Figure 6 , in particular a vertical section through the fan unit 47. The fan unit 47 has a radial fan 55.

[0077] Figure 8 Figure 34 shows a perspective view of the fresh air system. In particular, it shows Figure 8the fastening means 37 for attaching the bracket 36 to the headrest poles 38 and furthermore the fastening means 39 for detachable attachment to the seat backrest brackets 40.

[0078] Figure 9 Figure 34 shows the fresh air system 34, configured as a hang-on unit 35, from a further perspective view. In particular, it shows Figure 9 a mounting plate 55 for detachable attachment of the fan unit 47 to the underside 46 of the console base 25.

[0079] Figure 10Figure 1 schematically shows the seat console 10, 10' with a nozzle unit 56 configured to generate both a fresh air flow L and an air barrier B. The fresh air flow L is contained by the air barrier B, allowing it to remain within the area of ​​the person sitting on the seat console 10, 10' for a longer period. The air barrier B also serves to shield against vapors and / or aerosols rising from the outside, ensuring that the operator is reliably seated in a fresh air atmosphere on the seat console 10, 10'.

[0080] To generate the fresh air flow L, according to Figure 10 The nozzle unit 56 has two fresh air openings 57. Furthermore, the nozzle unit 56 has an arc-shaped nozzle 58 to form an air barrier B in the form of a tunnel in which the fresh air flow L is enclosed.

[0081] Figure 11Figure 1 shows the seat console 10, 10' with nozzle units 41 arranged on it, whose fresh air streams L meet an oncoming fresh air stream L' from the control panel 14, 22. The converging fresh air streams L, L' cause a turbulence V of fresh air in an area immediately in front of an operator or driver F positioned on the seat console 10, 10', so that the fresh air atmosphere can be maintained for a longer period of time in their vicinity.

Claims

1. Road construction machine (1), which is configured in the form of a road paver (2) or a feeder vehicle (18) for a road paver (2), comprising a driver's control station (9, 21), which is open at least to one side (S), for a driver (F) of the road construction machine (1), wherein the driver's control station (9, 21) has at least one seat console (10), characterized in that the seat console (10) comprises a fresh air system (34) for generating a fresh air flow (L) by means of the seat console.

2. Road construction machine according to claim 1, characterized in that the seat console (10) comprises a console floor (25), which is in particular pivotably and / or displaceably mounted, to the underside (46) of which at least one fan unit (47) of the fresh air system (34) is fastened.

3. Road construction machine according to claim 2, characterized in that the fan unit (47) is configured for detachable or fixed attachment of a filter unit (49).

4. Road construction machine according to claim 2 or 3, characterized in that the fan unit (47) comprises at least one electrically, hydraulically or pneumatically operated fan (48).

5. Road construction machine according to claim 4, characterized in that the fan (48) is a radial fan or an axial fan.

6. Road construction machine according to one of claims 2 to 5, characterized in that the fan unit (47) provides a plurality of fans (48) which can be controlled in parallel.

7. Road construction machine according to one of claims 2 to 6, characterized in that the fresh air system (34) comprises at least one filter unit (49) arranged on an intake side and / or on an exhaust side of the fan unit (47).

8. Road construction machine according to claim 7, characterized in that the filter unit (49) is positioned together with the fan unit (47) below the console floor (25) and / or in that the filter unit (49) and the fan unit (47) form separate modules which can be coupled to one another.

9. Road construction machine according to one of claims 2 to 8, characterized in that the fresh air system (34) comprises at least one nozzle unit (41) for fresh air, which can be arranged both next to a headrest (30) of the seat console (10) and next to a backrest (31) of the seat console (10).

10. Road construction machine according to claim 9, characterized in that the fresh air system (34) has at least one further nozzle unit (44) for fresh air, which can be arranged in different positions (P3, P4) laterally of a seat base (32) of the seat console (10).

11. Road construction machine according to claim 9 or 10, characterized in that the nozzle unit (41, 44) comprises at least one fresh air opening (42) with an adjustable lamella (43).

12. Road construction machine according to one of claims 9 to 11, characterized in that the nozzle unit (41, 44, 56) has both at least one fresh air opening (42, 57) for fresh air and at least one nozzle (58) for forming an air barrier (B).

13. Road construction machine according to one of claims 9 to 12, characterized in that at least one air duct (50), in particular several air ducts (50), leads away from the fan unit (47) in order to supply at least one nozzle unit (41, 44) with fresh air (L) in each case.

14. Road construction machine according to one of claims 9 to 13, characterized in that the nozzle unit (41) is arranged adjustably, in particular pivotably.

15. Road construction machine according to one of the preceding claims, characterized in that the fresh air system (34) provided on the seat console (10) can be used together with a further fresh air system (34, 34') arranged on a control panel (14, 22) of the driver's control station (9, 21).

16. Road construction machine according to claim 15, characterized in that the two fresh air systems (34, 34') are configured to generate oppositely directed fresh air flows (L, L') which converge and are surrounded, in particular at least in some areas, by the air barrier (B).

17. Road construction machine according to one of claims 2 to 16, characterized in that a fresh air flow rate flowing out of the fresh air system (34) can be varied by adjusting the speed of the fan unit (47).

18. Road construction machine according to one of the preceding claims, characterized in that at least one control element (60) is provided for adjusting the speed of the fan unit (47) on the seat console (10), in particular directly on the fresh air system (34), on a control panel (14, 22) of the driver's control station (9, 21) and / or on an external control station (15) of the road construction machine (1) formed separately from the driver's control station (9, 21).

19. Road construction machine according to one of the preceding claims, characterized in that the fresh air system (34) is available as a hang-on system (35) for the seat console (10) or is integrated in the seat console (10).

20. Method for generating a fresh air flow (L) by means of a seat console (10) of a driver's control station (9, 21), which is open to the side (S), of a road construction machine (1) which is configured as a road paver (2) or as a feeder vehicle (18) for a road paver (2).