EP3704428A1

EP3704428A1 - Device for controlling the temperature of objects

Info

Publication number: EP3704428A1
Application number: EP17811567.1A
Authority: EP
Inventors: Mathias Moll; Harald Sonner
Original assignee: Eisenmann SE
Current assignee: Eisenmann GmbH
Priority date: 2016-12-21
Filing date: 2017-12-07
Publication date: 2020-09-09
Also published as: DE102016125060A1; US20190316842A1; CN110088548B; US11525631B2; DE102016125060B4; WO2018114375A1; CN110088548A

Abstract

What is presented is a device for controlling the temperature of, and in particular for drying, objects (12), in particular vehicle bodies (16), having a housing (22) which integrates a temperature-control chamber (18) that comprises at least one air outlet (68) and at least one air inlet (76). The temperature-control chamber (18) is assigned at least one heating unit (72) in which it is possible to generate a hot primary gas flow (92) and to which it is possible to supply, from the air outlet (68), air (90) that is to be heated. The heating unit (72) comprises a heat exchanger device (94) into which the hot primary gas (92) can be guided and in which it is possible to heat air (90) from the temperature-control chamber (18) using hot primary gas (92), which air can be supplied, as heated recirculation air, in a circuit via the at least one air inlet (76) back to the temperature-control chamber (18). The heating unit (72) comprises at least a first and a second flow outlet (106, 108) via which heated recirculation air leaves the heating unit.

Description

Device for tempering objects

The invention relates to a device for tempering, in particular for drying, articles, in particular vehicle bodies, with a) a housing in which a temperature control chamber is housed, which comprises at least one air outlet and at least one air inlet; wherein b) the tempering at least one heating unit is assigned, in which a hot primary gas flow can be generated and which air to be heated from the air outlet can be supplied; c) the heating unit comprises a heat exchanger device, in which the hot primary gas is conductive and in which air from the temperature controlled by hot primary gas is heated, which is the temperature control as heated circulating air again in a circuit via the at least one air inlet can be fed.

In such systems known from the market, in particular freshly painted vehicle bodies, but also parts of vehicle bodies or other objects are dried. Such dryers are heated by, inter alia, aspirating air from the tempering space, which is usually designed as a tempering tunnel, and mostly from tunnel sections which are short compared to the total length of the tempering tunnel, heated in a heating unit by means of a heat exchanger and recirculated to the tempering tunnel or corresponding tunnel sections.

It is an object of the invention to develop a device of the type mentioned in terms of efficient energy recovery. This object is achieved in a device of the type mentioned above in that d) the heating unit comprises at least a first and a second flow outlet, via which heated circulating air exits the heating unit.

With such a heating unit two energetically different circulating air flows can be generated, which can be supplied to the temperature control at different locations. By means of the heating unit, the circulating air is divided into at least two partial streams. As a result, the temperature profile in the temperature control tunnel can be adapted more flexibly to changing conditions than is possible with conventional heating units, in which the entire air heated in the heating unit is guided into one and the same circuit.

It is expedient if the first and the second flow outlet in each case a separate blower for conveying the circulating air is assigned.

It is advantageous if the heat exchanger device comprises a first heat exchanger and a second heat exchanger, wherein air heated with the aid of the first heat exchanger exits the heating unit via the first flow outlet and with the aid of the second heat exchanger via the second flow outlet. In this way, the partial flows can be heated individually to their own temperature.

This is even more effective if, for each heat exchanger of the heat exchanger device, a separate burner is assigned, with which primary gas can be generated for each heat exchanger. A further advantageous setting possibility is created when primary gas, which has flowed through a heat exchanger, flows out as burner exhaust air via a discharge connection, wherein the outflow of the primary gas can be adjusted, preferably by means of a valve.

Preferably, one or more temperature sensors are provided, by means of which the temperature of the air to be heated and / or the temperature of the heated air can be detected. Thus, a temperature profile in the temperature control room can be specifically monitored and adjusted.

It is favorable if the tempering space is constructed by a plurality of drying modules, of which at least one is constructed as an aggregate module with a heating unit and at least one as a pressure space module with a pressure chamber which is connected to at least one of the two flow outputs of the heating unit and from which heated air can flow into the temperature control.

It is particularly advantageous if the aggregate module cooperates with two pressure chamber modules. From each existing flow output of the heating unit then a pressure chamber and above a respective portion of the temperature control can be fed with heated circulating air.

Favorable arrangements of the components are given if the aggregate module comprises a heating unit on each side of the temperature control room or if the aggregate module comprises a heating unit on only one side of the temperature control room and / or if the aggregate module comprises a heating unit which is located above the temperature control room.

Embodiments of the invention will be explained in more detail with reference to the drawings. In these show: Figure 1 shows schematically a perspective view of a dryer for drying articles, in which a drying space is defined by a drying tunnel, which is composed of several drying modules in the form of aggregate modules and pressure chamber modules;

Figure 2 is a perspective view of a tunnel section illustrating a conveyor system;

Figure 3 is a perspective view of a portion of the dryer of Figure 1, in which an aggregate module and a pressure chamber module are completely visible;

Figure 4 is a plan view of the drying tunnel looking towards the plane IV in Figure 3, wherein an aggregate module having on each tunnel side a boiler room with a heating unit, and two pressure chamber modules are shown, each having a pressure chamber on each side of the tunnel over which a heating unit heated air can be injected into the drying tunnel;

FIG. 5 shows a top view, corresponding to FIG. 4, of a heating chamber

Heating unit of the aggregate module in an enlarged scale;

Figure 6 is a side view of the boiler room with heating unit;

Figures 7 to 10 of Figure 6 are corresponding side views of the boiler room, each with a modified heating unit;

Figure 1 1 is a plan view corresponding to Figure 4 of a second embodiment of the dryer, in which an aggregate module only on a tunnel side a boiler room with heating unit and on the opposite side of the tunnel comprises a pressure chamber; Figure 12 is a plan view corresponding to Figure 4 of a third embodiment of the dryer, in which only one side of the unit module and the pressure chamber module, a heating chamber or a pressure chamber is provided;

Figure 13 is a plan view corresponding to Figure 4 of a fourth embodiment of the dryer, in which the heating units are arranged above the plane IV in Figure 3;

Figure 14 is a plan view similar to Figure 4 on a modified

A dryer in which a drying space is defined by a drying chamber, wherein a heating unit on one end side of the drying chamber and two pressure chambers on both sides of the drying chamber are present.

In FIG. 1, a tempering device for tempering workpieces 12 shown only in FIG. As an example of such a temperature control device 10, a dryer 14 is shown. As an example of workpieces 12, a vehicle body 16 is shown in FIG. 2; However, the workpieces 12 can also be other workpieces and, in particular, attachable or built-on parts of vehicle bodies 16 such as bumpers, side mirrors or the like. Smaller workpieces 12 may optionally be placed on a workpiece carrier not specifically shown.

In the exemplary embodiments according to FIGS. 1 to 13, the dryer 14 comprises a temperature control chamber 18 in the form of a drying tunnel 20, which is accommodated in a dryer housing 22. The dryer housing 22 is formed thermally insulating. The workpieces to be dried 12 are conveyed in the passage of a tunnel entrance to a tunnel exit, which are not visible in the figures. For this purpose, the dryer 14 comprises a transport system 24, with which the workpieces 12 are conveyed through the drying space 18 and which is illustrated only in FIG. The transport system 24 comprises a plurality of transport carriages 26, of which only one can be seen in FIG. 2 and on which the workpieces 12 are transported and which are moved on a rail system 28. The rail system 28 of the transport system 24 includes a support rail 30 on which the transport carriage 26 moves and which is formed in a manner known per se as an I-profile and anchored to the ground. The thus ground support rail 30 is single track. Alternatively, a multi-track, in particular two-track rail system 28 may be present.

The transport carriage 26 comprises a fastening device 32, to which a vehicle body 18 or a corresponding workpiece carrier for workpieces 12 can be attached. In the present embodiment, the fastening device 32 is designed for receiving vehicle bodies 16. For this purpose, the fastening means 32 comprises a support profile 34 with not visible in Figure 2 bearing pin, which cooperate in a conventional manner with counter-elements on the vehicle body 16, so that the vehicle body 16 can be fixed to the mounting device 32. The fastener 32 may also include a plurality of sets of such bearing bolts that are adapted to different vehicle bodies 16 having different dimensions and configurations, such that the fastener 32 may be flexibly utilized for different types of vehicle bodies. The trolley 26 includes a trolley chassis 34, which runs on the support rail 30 and the attachment means 32 superimposed. The trolley chassis 34 is coupled via a connecting device 36 with the fastening device 32. The coupling is set up in such a way that the transport carriage 26 is able to pass through curve sections of the mounting rail 30 as well. For this purpose, the trolley chassis 34 may comprise, for example, a precursor unit and a trailer unit, which are articulated to each other, wherein in Figure 2, only a precursor unit 36 is partially visible.

In the present embodiment, the connector 36 includes two vertical pivot struts 40 that couple the precursor unit 38 and the slave unit to the fastener 32. The articulated struts 38, 40 make it possible, by means of a not specifically designated joint, for the attachment device 32 to be able to pivot about a vertical axis of rotation relative to the precursor unit 32 and the trailer unit 34.

The trolleys 26 each carry their own drive system, so that the trolleys 26 can be driven and moved independently of one another. In addition to such transport vehicles 26 with their own drive system, if necessary, other transport vehicles can be present, which are driven by a central drive system. For example, such a central drive system may be formed by a chain hoist or the like. The transport carriage 26 explained here can then also be driven and moved independently of other drive devices.

In the case of modifications not specifically shown here, other conveying system may also be provided, as they are known per se. For this purpose, in particular, for example, roller conveyor, chain conveyor, belt or belt conveyor and otherwise designed as described above rail systems or are suitable, which can be operated intermittently or continuously.

As can be seen in FIG. 2, the drying tunnel 20 is bounded below by a tunnel floor 42. The tunnel floor 42 has a to the connecting device 36 of the trolley 26 complementary connecting passage 44 which leads to a arranged below the drying tunnel 20 driving space 46 for the trolley chassis 34, in which the rail system 30 is housed.

When entering a loaded with a workpiece 12 transport carriage 26 in the dryer 14, the connecting device 36 of the trolley 26 is thus threaded as it were in the connecting passage 44 of the tunnel floor 42. When the workpieces 12 are then conveyed through the drying tunnel 20, the trolley carriage 34 moves in the traveling space 46 and carries with it the attachment means 32 in the drying tunnel 20, whereby the connecting means 36, i. in the present embodiment, the hinge struts 40, extends through the connecting passage 44 in the tunnel floor 42 therethrough.

As can be seen in Figure 2, the connecting passage 44 is formed in the present embodiment to match the vertically extending hinge struts 40 as a vertical passage slot. In this case, the tunnel atmosphere with appropriate flow conditions can flow largely unhindered from the drying tunnel 20 through the connecting passage 44 down into the driving space 46. In order to make such an outflow of the tunnel atmosphere from the drying tunnel 20 at least difficult, suitable sealing or shielding means can be provided.

The drying tunnel 20 is constructed by a plurality of dryer modules 48, which have a module housing 50, in each of which a module tunnel 52 is accommodated and which includes side walls 54, a ceiling 56, and a module floor 58. The module tunnel 52 of the successively arranged dryer modules 48 form the drying tunnel 20 of the dryer 14, ie each module tunnel 52 of a dryer module 48 defines a portion of the drying tunnel 20, wherein each module bottom 58 defines a portion of the connecting passage 44 of the resulting tunnel floor 42. The dryer modules 48 are disposed within the cross section of the dryer 14.

The module tunnel 52 is delimited laterally by intermediate walls 60, so that a working space 62 is formed between a side wall 54 of a module housing 50 and a respective intermediate wall 60.

In the present case, a dryer module 48 can be preassembled as a structural unit, so that the dryer 14 can be assembled at its operating location by joining the pre-assembled dryer modules 48. Alternatively, a dryer module 48 may be formed only during installation of the dryer 14.

In preassembled dryer modules 48, these are equipped with mutually complementary connections for fluid lines and electrical lines, which must be available as resources for the operation of the dryer 14.

The dryer 14 operates on the well-known dryer concept, in which hot and preconditioned air from pressure chambers, which are accommodated on one or both sides of the drying tunnel 20 in the dryer housing 22, is blown into the drying tunnel 20. FIG. 4 shows an exemplary embodiment in which air is blown into the drying tunnel 20 from both sides

In all of the present embodiments, there are two types of dryer modules 48, the len in the form of aggregate modules 64 and 66 in the form of Druckumummodu on the other hand present, which in turn are adapted to the selected injection concept; this will be clearer below. An aggregate module 64 has in its intermediate wall 60 one or more air outlets 68, via which tunnel air is sucked through at least one blower 70 into the working space 62 of the aggregate module 64, in which this tunnel air is heated by a heating unit 72 accommodated in the working space 62. Such a heating unit 72 is assigned to the tempering space, which is designed here in the form of the drying tunnel 20.

The working chamber 62 of a pressure chamber module 66 forms a pressure chamber 74, in which this heated tunnel air flows in and is returned to the drying tunnel 20 via one or more air inlets 76 in the pressure space 74 delimiting intermediate wall 60. In this way, tunnel air is circulated from the drying tunnel 20 in a circuit and fed back to the drying tunnel 20 as heated circulating air. This returned, heated circulating air is e.g. via nozzles 78, which are arranged in the air inlets 76, directed onto the objects to be dried 12 and is usually between about 80 ° C and 220 ° C hot. In the flow direction in front of the air inlets 76, a filter device 80 shown in Figures 4, 1 1, 12 and 14 is provided in the pressure chamber 74 of a pressure chamber module 66, through which the heated tunnel air is filtered before its re-entry into the drying tunnel 20 and freed of entrained particles , In the exemplary embodiments shown here, this filter device 80 is designed as a filter wall 82 with filter cartridges in front of the air inlets 76 with the nozzles 78.

Between the filter wall 82 and the intermediate wall 60, a flow space 83a is formed in the pressure space module 66 in this way. The working space 62 of the aggregate module 64 defines in each case two such flow spaces 83b and 83c on the side remote from the drying tunnel 20 side of each intermediate wall 60, in which also air inlets 76 with nozzles 78 are present. The flow spaces 83b and 83c are fluidly separated from each other by a partition not specifically provided with a reference numeral. The flow space 83b of the aggregate module 64 is connected to the flow space 83a of the left-hand pressure chamber module 66 in FIG. 4, and the flow space 83c of the aggregate module 64 is connected to the flow space 83a of the right-hand pressure chamber module 66 in FIG. Thus, heated circulating air can flow downstream of the filter walls 82 into the intermediate spaces 83b, 83c of the aggregate module 64 and from there into the drying tunnel. The intermediate spaces 83a, 83b and 83c are provided with reference numerals only in FIG.

If appropriate, the air can also be humidified or dehumidified before re-entry into the drying tunnel 20, for which purpose appropriate conditioning devices are provided, as is known per se. In addition, the air can also be mixed with conditioned fresh air before entering the drying tunnel 20. Again, this can be done adjusting the temperature of a recirculation air flow.

A heating unit 72 comprises a burner device 84 with at least one burner 86 and an associated combustion chamber 88, by means of which a hot primary gas flow is generated, for which the heating unit 72 and the burner 86 in a known manner a fuel gas and combustion air is supplied. In Figures 6 to 10 and 13, the flowing tunnel air, i. both tunnel air to be heated from the drying tunnel 20 and heated tunnel air after flowing through the heating unit 72, illustrated by arrows 90 and the flowing primary gas by arrows 92.

Primary gas generated in the heater assembly 72 is directed into a heat exchanger device having one or more heat exchangers 94 where the air drawn through the air outlets 68 into the working space 62 of the unit module 64 is heated by the hot primary gas 92. Such a heat exchanger 94 in the present exemplary embodiments comprises a meander-shaped pipe system 96 into which the hot primary gas 92 flows via an inlet connection 98, which is connected to the combustion chamber 88 of the burner 86. At the end of the pipe system 96 is a discharge port 100, via which the primary gas 92 flows out as burner exhaust air, which can optionally be discharged through the roof or is first subjected to further purification.

If there are correspondingly two delivery ports 100, via which the respective primary gas flows out as burner exhaust air, these two burner exhaust air streams, which can have different temperatures, can be brought together or fed separately from one another to use or removed via the roof.

As can be seen in Figures 4 and 5, the Rohsystem 96 comprises a first portion 96a, a second portion 96b and a third portion 96c, which are successively meandered by the hot primary gas flows through. The flow cross section of the first section 96a is greater than the flow cross section of the second section 96b, which in turn is larger than the flow cross section of the third section 96c. This takes into account the falling in the flow through the pipe system 96 temperature of the primary gas 92; the largest heat transfer to the tunnel air 90 takes place at the beginning of the pipe system 96. Due to the successive cooling of the primary gas whose volume decreases in the flow path. Due to the changing cross sections of the sections 96a, 96b, 96c, the flow velocity thereof remains constant.

In addition, such a heat exchanger 94 has a heat exchanger access 102 for tunnel air to be heated, through which the tunnel air to be heated is introduced into the heat exchanger. shear 94 into and can flow along the pipe system 96 along. The then heated tunnel air leaves the heat exchanger 94 through a heat exchanger exit 104.

In the present exemplary embodiments, a heating unit 72 has a first flow outlet 106 and a second flow outlet 108, via which the heated tunnel air 90 exits the heating unit 72 and is discharged therefrom.

In this way, the basis is created with the heating unit 72 to generate two different energy circulating air flows, which can be supplied to the drying tunnel 20 at different locations. As a result, the temperature profile in the drying tunnel 20 can be adapted more flexibly to changing conditions than is possible with conventional heating units.

In the exemplary embodiments shown here, each of the two flow outlets 106, 108 is assigned its own one of the above-mentioned fans 70, so that the volume flow of the heated tunnel air at each flow outlet 106, 108 can be adjusted separately. The intake flow of the tunnel air through the air outlets 68 in the intermediate wall 60 of the aggregate module 64 results from the total output of the blower 70.

The fans 70 are individually controllable by a control not shown separately. These are, for example, speed-controlled fans, which are controlled via a frequency control.

In the exemplary embodiments shown in FIGS. 1 to 13, in the case of the unit module 64, the first flow outlet 106 with the pressure space 74 is one first pressure space module 66 and the second flow outlet 108 connected to the pressure chamber 74 of a second pressure chamber module 66, wherein the pressure chamber modules 66 are arranged in front of and behind the unit module 64.

Depending on the fan power of the blower 70 at the flow outputs 106 and 108 of the heating unit 72, the associated pressure chambers 74 can be supplied independently with heated recirculation air, whereby the energy input into the drying tunnel 20 can be adjusted individually for each pressure chamber module 66.

In non-specifically shown variations, the heater assembly 72 may also include more flow outlets than the two flow outlets 106, 108; for a third and further such flow exits, which may each again be equipped with its own fan, the above applies mutatis mutandis accordingly.

In order to be able to set the individual inflow of the heated tunnel air into the drying tunnel 20 even more selectively, corresponding blowers can also be provided in the intermediate walls 60 of the pressure chamber modules 66. For example, instead of the passive nozzles 78, there may also be active nozzles in the form of fans, so that the volume flow of heated circulating air at each such active nozzle can be adjusted. Alternatively, the filter wall 82 may be equipped with appropriate blowers and, for example, a blower per filter cartridge may be provided so that groups of air inlets 76 or nozzles 78 can always be supplied with an individually controllable circulating air flow.

In the exemplary embodiment shown in FIG. 6, the heating unit 72 comprises a burner device 84 with a burner 86 and a burner 86 assigned to this burner 86. arranged combustion chamber 88 and two heat exchangers 94, which are designated 94a and 94b and both of which are supplied from the one existing combustion chamber 88 with hot primary gas 92. Tunnelluft heated in the first heat exchanger 94a passes through the first flow outlet 106 and in the second heat exchanger 94b heated tunnel air exits through the second flow outlet 108 from the heater 72 from.

For this purpose, in the exemplary embodiments shown here, the heat exchanger outlet 104 of the first heat exchanger 94a is connected to the first flow outlet 106 of the heating unit 72 via a first flow channel 110. The heat exchanger outlet 100 of the second heat exchanger 94b is connected to the second flow outlet 108 of the heating unit 72 via a second flow channel 12. In this way, heated tunnel air 90 from the first heat exchanger 94a via the first flow outlet 106 and its fan 70 and heated tunnel air 90 from the second heat exchanger 94b via the second flow outlet 108 and its fan 70 is discharged from the heating unit 72.

The embodiment shown in FIG. 7 differs therefrom in that the heating unit 72 comprises a burner device 84 with two burners 86 and one combustion chamber 88 each, the first burner and the first combustion chamber having 86a and 88a and the second burner having the second combustion chamber are designated 86b and 88b, respectively. Each burner 86a, 86b fuel gas and combustion air is supplied separately. There are also two heat exchangers 94a, 94b, wherein now receives the first heat exchanger 94a primary gas from the first combustion chamber 88a and the second heat exchanger 94 primary gas from the second combustion chamber 88b.

In the embodiment according to FIG. 8, the burner device 84 of the heating unit 72 again comprises only one burner 86 with associated combustion chamber. 88. Instead of two heat exchangers 94a, 94b, the heat exchanger device 94 there includes only a single heat exchanger 94a, the heat exchanger exit 104 is connected to the two flow channels 1 10 and 1 12.

The embodiment of Figure 9 corresponds to the embodiment of Figure 6 with the only difference that the discharge port 100 of the first heat exchanger 94a comprises a valve 1 14, by means of which the outflow of the primary gas and the burner exhaust air from the first heat exchanger 94a can be adjusted.

In the embodiment of Figure 10 are compared to the embodiment of Figure 6 additional temperature sensor 1 16 available. In this case, a temperature sensor 16a is present in order to detect the temperature of the tunnel air to be heated flowing to the heat exchangers 94a, 94b. In each case, a further temperature sensor 1 16b is disposed in the flow channels 1 10 and 1 12 to determine the temperature of the heated tunnel air after leaving the respective heat exchanger 94a, 94b. In addition, in each case a temperature sensor 1 16c at the flow outputs 106 and 108, respectively, so that the temperature of the heated tunnel air can be determined when it leaves the heating unit 72.

All the temperature sensors 16a, 16b or 16c shown may be present, but it may be sufficient if only one or a few such temperature sensors 16a, 16b, 16c are provided. Also in drying tunnel 20, as an alternative or in addition to the temperature sensor, 1 16 temperature sensors can be used, by which the temperature of the tunnel air in the pressure chamber modules 66 can be detected. Depending on the temperature data thus obtained, the fans 70, existing butterfly valves or the burner power can be controlled in order to adapt or maintain the temperature profile in the drying tunnel 20.

In this way, the temperature zones in the drying tunnel 20 can be finely dissolved. Thus, differentiated temperature settings can be made in the longitudinal direction of the drying tunnel, but also in its transverse direction. Depending on the longitudinal extension of the pressure chamber modules 66, the temperature resolution in the longitudinal direction of the drying tunnel 20 can be adjusted. Due to the short flow paths from the heating unit 72 to the air inlets 76 in the pressure chamber modules 66 desired temperature changes can be realized within short response times. In this way, the drying tunnel 20 can be quickly adjusted to different successive workpieces 12.

It is also possible that the temperature profile in the drying tunnel 20 can move as it were synchronized in the longitudinal direction with the conveying movement of the workpiece.

As described above, FIG. 4 shows a dryer 14 in which a heating unit 72 is provided on each side of the drying tunnel 20 in the aggregate module 64 in each working space 62. Figure 1 1 illustrates a different concept, in which an aggregate module 64 only in one of the two working spaces 62 on only one side of the drying tunnel 20 accommodates a heating unit 72, wherein the heated tunnel air 90 is still blown from both sides into the drying tunnel 20. For this purpose, the two pressure chambers 74 of a pressure chamber module 66 via a connecting channel 1 18 fluidly connected to each other, so that heated tunnel air 90, which first flows from the unit module 64 in a pressure chamber 74 of a pressure chamber module 66, from there via the connecting channel 1 18 in the second pressure chamber 74 passes to the other side of the drying tunnel 20 and there can flow into it. The empty working space 62 of the aggregate module 64, in which no heating unit 72 is now housed, can in this case serve as a pressure chamber 74 when it is connected to at least one pressure chamber 74 of the adjacent pressure chamber modules 66. The intermediate wall 60 of the unit module 64 may in this case be equipped with air inlets 76 and nozzles 78, as is the case with the intermediate walls 60 of the pressure chamber modules 66.

In the embodiment according to FIG. 12, the dryer 14 follows a one-sided feed concept. The dryer modules 48, i. the aggregate modules 64 and the pressure chamber modules 66 have there only on one side of the drying tunnel 20 a working space 62, i. a working chamber 62 and a pressure chamber 74. The drying tunnel 20 is limited in this case on the opposite side of the working space 62 of the dryer housing 22; Each module tunnel 52 is there consequently bounded by the side wall 54 of the respective module housing 50.

FIG. 13 shows a modification in which work spaces 62 are again provided on both sides of the drying tunnel 22, but which serve as pressure spaces 74 both in the aggregate modules 64 and in the pressure space modules 66. As can be seen in FIG. 13, in the unit module 64 two heating units 72 are accommodated above the ceiling 56 of the module tunnel 52, wherein heated tunnel air 90 passes through one of the heating units 72 into the first working space 62 and through the other heating unit 72 into the second working space 62 the aggregate module 64 is guided. From the working spaces 62 of the unit module 64, the heated tunnel air 90 then flows into the connected pressure chambers 74 of the adjacent pressure chamber modules 66 and from there into the drying tunnel 20 from both sides. The flow outlets 106, 108 of each heating unit 72 thus deliver the heated tunnel air downwards into the drying tunnel respective workspace 62 from.

Figure 13 illustrates in the two existing heating units 72 different positions of the flow outlets 106 and 108. When left in Figure 13 Heating unit 72, the flow outputs 106 and 108 as in the embodiments described above are arranged opposite one another on the end faces of the unit module 64. In the right-hand heating unit 72 in FIG. 13, the two flow outlets 106, 108 can be found offset in relation to each other asymmetrically in each case in the direction of the center. There, the heated tunnel air must consequently first flow through the working space 62 below the heating unit 72 in order to reach the pressure chambers 74 of the pressure chamber modules 66 present on the right and left in FIG.

As with all other embodiments, the heating unit 72 is also in the embodiment of Figure 13 within the cross section of the dryer 14 or within the predetermined by a dryer module 48 cross-section.

Basically, also arranged laterally and above the drying space 18 heating units 72 can be combined and integrated into an aggregate module 64.

FIG. 14 shows a further exemplary embodiment of a dryer 14, in which a temperature control chamber 18 is not designed as a drying tunnel 20 but as a drying chamber 120, which can be closed by an inlet and outlet gate 122. Such a drying chamber 120 may also be present in a dryer 14 in addition to a drying tunnel 20. The drying chamber 120 unites an aggregate module 64 with a pressure chamber module 66 and has for this purpose two opposite pressure chambers 74 and a frontal working space 62 on the side remote from the gate 122 side, in which the heating unit 72 is housed.

The embodiments described above reflect the conceptual design of the dryer 14 from aggregate modules 64 and print room modules 66. Through the interaction of the burner device 84 with the heat exchanger device 94 and with the blowers explained above, in particular with the blowers 70, the temperature of the heated tunnel air, ie the circulating air, can be adjusted at each flow outlet 106, 108 such that in each pressure chamber module 66 the air inlets 76 a certain heat input into the drying tunnel 20 can be effected.

Through each existing heat exchanger 94a, 94b tunnel air to be heated can be heated individually, which is favored in the presence of one burner 86 for each heat exchanger 94a, 94b.

Based on a previously defined reference heat input, correspondingly different heat input coefficients can be brought into the drying space 18 at the air inlets 76, which also have an effect on the heat input into the workpiece 12. In this case, a heat input coefficient of 1 means a heat input corresponding to the reference heat input through the generated stream of heated tunnel air. A heat input coefficient <1 means a lower, a heat input coefficient of> 1 means a larger heat input than the reference heat input.

Summarized again, the following constellations can occur in the exemplary embodiments explained above with always two blowers 70, depending on the arrangement of the heating unit 72, when an aggregate module 64 is combined with two pressure chamber modules 66:

Four different heat input coefficients can be achieved with the exemplary embodiment according to FIG. 4, one at each of the four flow outlets 106, 108 or at the associated air inlets 76 in the pressure chamber modules 66. With the embodiment of Figure 1 1, two different heat input coefficients can be achieved. Each approximately the same Wärmeeintrag- coefficient can be achieved at the air inlets 76 which are connected on the same side of the drying space 18 or via the connecting channel 1 18 on the opposite side of the drying space 18 with the first flow outlet 106. Also, each approximately the same heat input coefficient, but independent of the first flow outlet 106, can be achieved at the air inlets 76 which are connected on the same side of the drying chamber 18 or via the connecting channel 1 18 on the opposite side of the drying space 18 with the second flow outlet 108 are.

With the exemplary embodiment according to FIG. 12, two different heat input coefficients can also be achieved, one at each of the two flow outlets 106, 108 and at the associated air inlets 76 in the pressure chamber modules 66.

With the exemplary embodiment according to FIG. 13, four different heat input coefficients can again be achieved, one at each of the four flow outlets 106, 108 or at the associated air inlets 76 in the pressure chamber modules 66.

With the exemplary embodiment according to FIG. 14, two different heat input coefficients can again be achieved, one at each of the two flow outlets 106, 108 or at the associated air inlets 76 in the dryer module 48 shown there, which integrates an aggregate module 64 and a pressure chamber module 66 ,

In accordance with the number of aggregate modules 64 and pressure chamber modules 66, the number of possible different heat input coefficients is multiplied in each case. In principle, all temperature-sensitive connections and connection points or other components of the components involved are arranged outside the drying space 18, whereas non-temperature-sensitive elements can also be installed inside the drying space 18.

Claims

claims

1. A device for tempering, in particular for drying, of objects (12), in particular of vehicle bodies (16), with a) a housing (22) in which a temperature control chamber (18) is housed, which at least one air outlet (68) and at least one air inlet (76); wherein b) the temperature control chamber (18) is assigned at least one heating unit (72) in which a hot primary gas flow (92) can be generated and which air to be heated (90) from the air outlet (68) can be supplied; c) the heating unit (72) comprises a heat exchanger device (94) into which the hot primary gas (92) can be conducted and in which air (90) from the temperature control chamber (18) by hot primary gas (92) can be heated, which the tempering ( 18) can be supplied as heated circulating air again in a circuit via the at least one air inlet (76), characterized in that d) the heating unit (72) comprises at least a first and a second flow outlet (106, 108) via which heated circulating air exits the heating unit.

2. Apparatus according to claim 1, characterized in that the first and the second flow outlet (106, 108) each have their own fan (70) for conveying the recirculation air (90) is associated.

3. Apparatus according to claim 1 or 2, characterized in that the heat exchanger means (84) comprises a first heat exchanger (94a) and a second heat exchanger (94b), wherein with the aid of the first heat exchanger (94a) heated air via the first flow outlet (106 ) and with the aid of the second heat exchanger (94b) heated air via the second flow outlet (108) from the heating unit (72) emerges.

4. Device according to one of claims 1 to 3, characterized in that for each heat exchanger (94a, 94b) of the heat exchanger means (94) is associated with a separate burner (86), with which primary gas for each heat exchanger (94a, 94b) can be generated ,

5. Device according to one of claims 1 to 4, characterized in that primary gas (92), which has a heat exchanger (94a, 94b) flows through, as burner exhaust air via a discharge port (100) flows out, wherein the

Downstream of the primary gas can be adjusted, preferably by means of a valve (1 14).

6. Device according to one of claims 1 to 5, characterized in that one or more temperature sensors (1 16a, 1 16b, 1 16c) are provided, by means of which the temperature of the air to be heated and / or the temperature of the heated air can be detected ,

7. Device according to one of claims 1 to 6, characterized in that the temperature control chamber (18) is constructed by a plurality of drying modules (49), of which at least one as aggregate module (64) with a heating unit (72) and at least one as pressure chamber module ( 66) is formed with a pressure chamber (74) which is connected to at least one of the two flow outlets (106, 108) of the heating unit (72) and from which heated air can flow into the temperature control chamber (18).

8. Apparatus according to claim 7, characterized in that the aggregate module (64) cooperates with two pressure chamber modules (66).

9. Apparatus according to claim 7 or 8, characterized in that the aggregate module (64) on each side of the temperature control chamber (18) comprises a heating unit (72) or that the aggregate module (64) on only one side of the temperature control chamber (18) a heating unit includes and / or that the aggregate module (64) comprises a heating unit (72), which is housed above the temperature control chamber (18).