DE10328235B4 - Verwirbelungsstrecke and device for temperature control of a component - Google Patents

Abstract

Turbulence system (17) in a control system (02) for controlling the temperature of a component (01) of a machine comprises in direct succession a cross-section enlargement, a direction change, and a cross-section reduction. An Independent claim is also included for a device for controlling the temperature of a component of a printing machine using a fluid whose temperature is changed at a feed point (16). Preferred Features: The turbulence system is arranged in a control system for controlling the temperature of a component of a printing machine. The turbulence system is arranged between a feed point and the component.

Description

The The invention relates to a Verwirbelungsstrecke and a device for temperature control of a component according to the preamble of claims 1 and 4th

By the DE 44 29 520 A1 a device and a method for controlling the temperature of a component in a printing press is known, wherein the component is tempered by an at least partially circulating fluid. An actuator, by means of which a mixing ratio at a feed point of two fluid streams of different temperature is adjustable, is controlled by a temperature measuring point arranged between the feed point and the component.

The EP 0 886 577 B1 discloses a device and a method for temperature control of a component, wherein a component temperature monitored by sensors and the measured value is given to a control unit. If the temperature measured at the component deviates from a desired value, the control unit lowers or increases the temperature of a coolant in a cooling unit by a certain amount, waits for a period of time and repeats the measurement and the said steps until the setpoint is reached again.

Of the Invention is based on the object, a Verwirbelungsstrecke and to provide a device for tempering a component.

The The object is achieved by the Features of the claims 1 or 4 solved.

The particular advantages of the invention are that a very effective mixing on the shortest distance and thus in short Time is achieved without expensive installations.

The Temperature control works due to the Verwirbelungsstrecke, the early Obtaining a safe mixed temperature signal allows, too in case of larger following ones Transport routes for the temperature control medium, very fast and stable. The short reaction time allows the use in applications and processes with high dynamic shares. Thus, the present temperature control is also of great advantage there, where quick changes must be reconstructed in a temperature setpoint and / or where external conditions, such as B. energy input by friction or outside temperature, change very quickly.

embodiments The invention are illustrated in the drawings and are in Following closer described.

It demonstrate:

1 a schematic representation of the temperature control;

2 a more detailed section of the in 1 shown tempering;

3 a first embodiment of a Verwirbelungskammer;

4 a second embodiment of a swirling chamber;

5 a third embodiment of a Verwirbelungskammer.

A component 01 a machine, for. B. a printing press, should be tempered. The component 01 the printing press is z. B. part of a printing unit, not shown, in particular an ink-carrying roller 01 a printing unit. This roller 01 can as a roller 01 an inking unit, z. B. as an anilox roller 01 , or as a cylinder 01 of the printing unit, z. B. as a forme cylinder 01 be executed. Particularly advantageous is the device described below and the method for temperature control together with a printing unit for waterless offset printing, ie a printing unit without the use of dampening solution, can be used. In the printing unit, in particular a printing unit for waterless offset printing, the quality in the color transfer is extremely dependent on the temperature of the ink and / or the ink-carrying surfaces (for example, lateral surface of rollers 01 or cylinders 01 ). In addition, the quality in color transfer is also sensitive to a splitting speed, ie the engine speed.

The temperature is controlled by a tempering, in particular a fluid such. As water, which has a tempering 02 with the component 01 is brought into thermal interaction. Should the component 01 be flowed with the fluid, the fluid may also be a gas or gas mixture, such. B. be air. For temperature control, the component 01 in a first cycle 03 the fluid is supplied, flows through or flows around the component 01 , absorbs heat (cool) or gives off heat (heat) and flows back accordingly heated or cooled. In this first cycle 03 can be arranged a heating or cooling unit, which can serve to produce the desired fluid temperature.

In the advantageous embodiment according to 1 is the first cycle 03 however as a secondary circuit 03 in connection with a second circuit 04, a primary circuit 04 , in which the fluid with a defined and substantially constant temperature Tv, z. B. flow temperature Tv, rotates. A temperature control, z. As a thermostat, a heating and / or cooling unit, etc., which ensures the flow temperature Tv is not shown here. About a connection 05 between primary and secondary circuit 03 ; 04 can at a first connection point 06 of the primary circuit 04 via an actuator 07 , z. B. a controllable valve 07 , Fluid from the primary circuit 04 taken and the secondary circuit 03 be dosed. At a second junction 08 will, depending on the supply of new fluid at the junction 06 , Fluid from the secondary circuit 03 at a junction 10 over a connection 15 in the primary circuit 04 returned. For this purpose, for example, the fluid is in the region of the first connection point 06 at a higher pressure level than at the second connection point 08 , A difference Δp in the pressure level is z. B. by a corresponding differential pressure valve 09 between the joints 06 ; 08 generated.

The fluid, or a large part of the fluid, is driven by a drive 11 for example by a pump 11 , a turbine 11 or in any other way, on an inflow route 12 , through the component 01 , a return line 13 and a leg 14 between inflow and return line 12 ; 13 in the secondary circuit 03 circulated. Depending on the supply via the valve 07 flows after passing through the component 01 an appropriate amount of fluid over the compound 15 in the primary circuit 04 from or a correspondingly reduced amount of fluid through the section 14 , The over the leg 14 flowing back and fresh over the valve 07 at a feed or injection point 16 The supplied parts mix and form the temperature-controlled fluid for the temperature control. To improve the mixing is in an advantageous embodiment as possible directly behind the injection point 16 , in particular between the injection point 16 and the pump 11 , a turbulence range 17 , in particular a Verwirblungskammer 17 arranged.

In the above case, that not by means of a primary circuit 04 but is tempered by means of a heating or cooling unit, corresponds to the feed or injection point 16 the location of the energy exchange with the relevant heating or cooling unit and the actuator 07 For example, one of the heating or cooling unit associated power control o. Ä. The junction 10 in the cycle 03 not applicable, because the fluid in the whole cycle 03 circulated and at the feed point 16 Energy is supplied or removed, or heat or cold is "fed in." The heating or cooling unit in this case corresponds to the actuator, for example 07 ,

By tempering ultimately a certain temperature θ _{3 of} the component 01 in particular in the case of a roller 01 the surface temperature θ ₃ on the roller 01 to a certain setpoint θ _{3, should be} set or held. This is done by measuring a meaningful temperature on the one hand and controlling the supply of fluid from the primary 04 in the secondary circuit 03 on the other hand to produce a corresponding mixing temperature.

In an advantageous embodiment are between the injection point 16 and an outlet of the component to be tempered 01 at least two measuring points M1; M2; M3 with sensors S1; S2; S3 provided, wherein one of the measuring points M1 near the injection point 16 and at least one of the measuring points M2; M3 in the region of the near-end of the inflow section 12 and / or in the area of the component 01 arranged itself. The valve 07 , the pump 11 , the injection point 16 as well as the connection points 06 ; 08 are usually spatially close to each other, and z. B. in a dashed line indicated temperature control cabinet 18 arranged. Inflow and return line 12 ; 13 between the component 01 and the not explicitly shown outlet or entry into the temperature control cabinet 18 As a rule, they have a comparatively long length compared to the other routes, which is in 1 is indicated by respective interruptions. The locations for the measurement are now selected such that at least one measuring point M1 in the range of the temperature control cabinet 18 and a measuring point M2; M3 close to the component, ie at the end of the long inflow section 12 is arranged.

In the embodiment according to 1 the measurement of a first temperature θ _{1 takes place} between the point of injection 16 and the pump 11 , in particular between a Verwirbelungsstrecke 17 and the pump 11 , by means of a first sensor S1. A second temperature θ ₂ is by means of a second sensor S2 in the region of entry into the component 01 determined. The temperature θ ₃ is in 1 also determined by measurement, by one on the surface of the roller 01 directed infrared sensor (IR sensor) S3. The sensor S3 can also be arranged in the region of the lateral surface or as explained below u. U. also omitted.

The temperature is controlled by means of a control device 21 or a regulatory process 21 , which is described in more detail below. The control device 21 ( 1 ) is based on a multi-loop, here dreischleifige cascade control. An innermost control loop directs the sensor S1 shortly after the injection point 16 , a first regulator R1 and the actuator 07 ie the valve 07 , on. Of the Controller R1 receives as an input variable a deviation Δθ _{1 of} the measured value θ ₁ from a (corrected) setpoint value θ _{1, soll, k} (node K1) and acts according to its implemented control behavior and / or control algorithm with a control command Δ on the actuator 07 , Ie. depending on the deviation of the measured value θ ₁ from the (corrected) setpoint θ _{1, k, k it} opens or closes the valve 07 or retains the position. The (corrected) setpoint value θ _{1, soll, k} is now not defined directly by a controller or manually, as is otherwise customary, but is formed using an output variable of at least one second control loop which is further "outside." The second control loop comprises the sensor S2 just before entering the component 01 and a second regulator R2. The controller R2 receives as input a deviation Δθ _{2 of} the measured value θ ₂ at the sensor S2 from a (corrected) setpoint value θ _{2, soll, k} (node K2) and generates at its output according to its implemented control behavior and / or control algorithm one with the deviation Δθ ₂ correlated quantity dθ ₁ (output dθ ₁ ), which is used to form the above-corrected setpoint value θ _{1, soll, k} for the first controller R1. Ie. Depending on the deviation of the measured value θ ₂ from the (corrected) setpoint value θ _{2, soll, k} , the quantity dθ _{1 is used to} influence the corrected setpoint value θ _{1, soll, k of} the first controller R1 to be formed.

In a preferred embodiment, the corrected setpoint value θ _{1, soll, k} for the first controller R1 is made up of the quantity dθ ₁ and a theoretical setpoint value θ ' _{1, shall be} formed. The theoretical setpoint θ ' _1, in turn, is formed in a pilot control element with respect to the heat flow V _WF . The pilot control element V _WF , here V _{1, WF} (Index 1 for the first control loop) takes into account the heat exchange (losses, etc.) of the fluid on a partial route and is based on experience (expert knowledge, calibration measurements, etc.). Thus, the pilot control element V _{1, WF} takes into account _, for example, the heat or cooling losses on the section between the measuring points M1 and M2, by forming a correspondingly increased or decreased theoretical set point θ ' _{1, soll} , which then together with the quantity dθ ₁ to the corrected set point θ ' _{1, soll, k, k is processed} for the first controller R1. In the pilot control element V _WF is a relationship between the input variable (setpoint θ _{3, soll} or θ ' _{2, soll} or su θ' _{2, soll, n} ) and a corrected output variable (modified setpoint θ ' _{2, soll} or su θ ' _{2, should, n} or θ' _{1, should, n} ) fixed, which is preferably changed by parameters or otherwise as needed.

In principle, a simple embodiment of the control device is possible, in which only the two first-mentioned control circuits form the cascade control. In this case, the pre-control member V _{1, WF} as an input from a machine control or manually a defined setpoint θ _{2, should be} specified. This would also be used to form the above-mentioned deviation Δθ ₂ before the second controller R2.

In the in 1 illustrated embodiment, the control device 21 however, there are three cascaded control loops. The corrected setpoint value θ _{2, soll, k in} front of the second controller R2 is now likewise not specified directly by a control or manually, as usual, but is formed using an output variable of a third, outer control loop. The third control circuit has the sensor S3, which detects the temperature on or in the area of the lateral surface, and a third controller R3. The controller R3 receives as input a deviation Δθ _{3 of} the measured value θ ₃ (with a transit time T ' _L3 ) at the sensor S3 from a target value θ _{3, soll} (node K3) and generates at its output according to its implemented control behavior and / or control algorithm with the deviation Δθ ₃ correlated size dθ ₂ , which is used to form the above-corrected setpoint value θ _{2, soll, k} for the second controller R2. Ie. depending on the deviation of the measured value θ ₃ from the setpoint value θ _{3, which is} preset by a machine control or manually _, (or a corrected setpoint value θ '' _{3, soll} , see below), the quantity dθ _{2 is to} influence the corrected setpoint value θ _{2, soll , k of} the second regulator R2.

The corrected setpoint value θ _{2, soll, k} for the second controller R2 is formed from the quantity dθ ₂ and a theoretical setpoint value θ ' _{2, soll} (or θ'' _{2, shall be} su). The theoretical setpoint θ ' _{2, shall} be formed again in a pilot control element with respect to the heat flow V _{2, WF} . The pilot control element V _{2, WF} takes into account, for example, the heat or cooling losses on the section between the measuring points M2 and M3, by forming a correspondingly increased or decreased theoretical set point θ ' _{2, soll} , which then together with the quantity dθ ₂ to the corrected set point θ _{2, soll, k is processed} for the second controller R2.

The described method is thus based, on the one hand, on the measurement of the temperature directly behind the injection point 16 , in particular with the interposition of a Verwirbelungskammer 17 , As well as at least one measurement near the component to be tempered 01 , Second, a particularly short reaction time of the control is achieved in that a plurality of control loops mesh with each other in a cascade and already at the setpoint formation for the inner control loop closer to the component 01 measured value θ ₂ ; θ _{3 is} taken into account. Third, a particularly short reaction time is achieved by a pilot control, which experience for on the temperature control 02 introduces expected losses. One closer to the actuator 07 Thus, in anticipation of losses, the control circuit already present increases or decreases by an empirical value given.

A section of the schematic in 1 shown tempering in an advantageous concrete embodiment shows 2 , The inflow section 12 from the injection point 16 to a destination 22 , ie the place whose environment or surface is to be cooled, is in 2 in three sections 12.1 ; 12.2 ; 12.3 shown.

The first paragraph 12.1 ranges from the injection point 16 to the first measuring point M1 with the first sensor S1 and has a first path X1 and a first average transit time T _L1 . The second section 12.2 extends from the first measuring point M1 to a "component-near" measuring point M2 with the sensor S2, and has a second distance X2 and a second average transit time T _L2 12.3 with a third path X3 and a third average transit time T _L3 for the fluid joins the second measuring point M2 and extends to the destination 22 (Here the first contact of the fluid in the area of the extended lateral surface). A total running time T of the fluid from the point of injection 16 to the destination thus results in T _L1 + T _L2 + T _L3 .

The first measuring point M1 is "close to the feed point", ie at a short distance to the feed point, here the injection point 16 , chosen. Here, therefore, a location in the area of the inflow section becomes a point near the feed point M1 or sensor S1 near the center 12 understood, which with respect to the duration of the fluid less than a tenth, in particular as a twentieth, the distance from the feed point 16 until the first touch of the destination 22 (Here, the first contact of the fluid in the area of the extended lateral surface) is, ie T _L1 <0.1 T, in particular T _L1 <0.05 T. For a high control dynamics, the measuring point M1 is maximum with respect to the running time of the fluid T _L1 2 seconds, in particular a maximum of 1 second, from the injection point 16 away. As already too 1 called, are injection point 16 , Sensor S1 and the following pump 11 in a temperature control cabinet 18 , which forms a structural unit of the aggregates included. The measuring point M1 is preferably in front of the pump 11 ,

About detachable connections 23 ; 24 in the inflow section 12 and the return line 13 is the temperature control cabinet 18 with the component 01 connectable.

As a rule, are component 01 and temperature control cabinet 18 not directly adjacent to each other in the machine, so that a line 26 , z. B. a piping 26 or a hose 26 , from the temperature control cabinet 18 to an entry 27 into the component 01 , for example to an implementation 27 , in particular rotary feedthrough 27 , has a correspondingly large length. Carrying out in the roller 01 or the cylinder 01 is in 2 only shown schematically. Tells the roller 01 or the cylinder 01 as usual, the end face on a pin, it is carried out through the pin. Also the way of the fluid to the lateral surface as well as in the component 01 along the lateral surface is shown only symbolically and can in a known manner, for. B. in axial or spiral channels, in extended cavities, in a circular ring cross section, or in any other suitable ways below the lateral surface. The second measuring point M2 is "component close", ie at a small distance to the component 01 or to the destination 22 , here the lateral surface, chosen. Therefore, a location in the region of the inflow path is here below the second measuring point M2 close to the component or second sensor S2 close to the component 12 understood, which with respect. The duration of the fluid further away than halfway from the injection point 16 until the first touch of the destination 22 (Here the first contact of the fluid in the area of the extended lateral surface) is located. It applies T _L2 > 0.5 T. To a high dynamics of the control with low structural complexity for rotating components 01 To obtain the second measuring point M2 is in the line 26 stationary even outside of the rotating component 01 arranged, but is immediate, ie, with respect to the running time of the fluid a maximum of 3 seconds from the entrance 27 into the component 01 away.

The third measuring point M3, if present, is likewise arranged at least "close to the component", but in particular "close to the target". Ie. It is located in the immediate vicinity of the destination 22 of the fluid or directly detects the surface to be tempered (here lateral surface of the roller 01 ). In an advantageous embodiment, the measuring point M3 does not detect the fluid temperature, such. B. in the case of the measuring points M2 and M3, but the tempering region of the component 01 yourself. Under immediate surroundings to the destination 22 is understood here that the sensor S3 between in the component 01 Circulating fluid and the lateral surface is or contactlessly detects the temperature θ ₃ on the lateral surface.

In another embodiment of the tempering device can be dispensed with the measuring point S3. Conclusions on the temperature θ ₃ can be obtained from empirical values by the measured values of the measuring point M2, for example based on a stored relationship, an offset, a functional relationship. For a desired temperature θ ₃ is then z. B., taking into account the machine or production parameters (including engine speed, ambient temperature and / or fluid flow rate, (squeegee) coefficient of friction, thermal transmittance) to a desired temperature θ ₂ regulated as a target value.

In another embodiment will be on again the measuring point M3 is omitted, conclusions on the temperature θ ₃ , however, from empirical values on the measured values of the measuring point M2 and one in the backflow to the component 01 arranged measuring point M4, for example, again based on a stored relationship, an offset, a functional relationship and / or by averaging of the two measured values won. For a desired temperature θ ₃ is then z. For example, either taking into account the machine or production parameters (such as engine speed, ambient temperature and / or fluid flow rate) back θ to a desired temperature ₂ controlled as a target value, or θ to the indirectly detected by the two measured values temperature. ₃ In 2 are inflow and outflow of the fluid in or out of the roller 01 or cylinder 01 executed component 01 on the same front. Accordingly, the rotary feedthrough is in this case with two terminals, or as shown with two coaxial with each other and coaxial with the roller 01 arranged bushings executed. The measuring point M4 is likewise arranged as close as possible to the bushing.

In the advantageous embodiment of the tempering this has on the section 12.1 between feed-in point 16 and first measuring point M1 a Verwirbelungsstrecke 17 , In particular, a specially trained Verwirbelungskammer 17 , on. As already mentioned above, the measuring point M1 should be arranged near the feed point, so that the fastest possible reaction times in the relevant control loop with the measuring point M1 and the actuator 07 are feasible. On the other hand, however, close to the feed point usually still no homogeneous mixture between fed and recirculated fluid (or in the heated / cooled fluid) is reached, so that measurement error complicate rules and u. U. reaching the ultimate desired temperature θ ₃ on the component 01 delay significantly.

The use of the Verwirbelungsstrecke 17 , in particular the specially designed Verwirbelungskammer 17 according to 3 and 4 , ensure in a simple manner a safe mixing of the fluid at the shortest distance, so that the above-mentioned condition with respect to the short term T1 can be satisfied.

On smallest space takes place first a first cross-sectional change, wherein a first cross-sectional area A1 jumped at least increased by a factor f1 = 2 to a second cross-sectional area A2. in the direct connection takes place a change of direction from 70 ° to 110 °, especially abrupt about 90 °, whereupon a second cross section change and that reduction from the cross-sectional area A2 on the cross-sectional area A3 with the factor f2 (f2 <1) followed. The factor f2 is advantageously f2 ≦ 0.5 chosen and is complementary chosen to the factor f1 such that the two cross sectional areas A1; A3 before and after the Verwirbelungskammer 17 is substantially the same are big.

3 shows an embodiment of the swirling chamber 17 with (round) tubular inlet and outlet area 29 ; 31 , wherein not shown tubular lines with cross-sectional area A1 here in centrally arranged openings 32 ; 33 as an inlet 32 and outlet 33 lead. The dash line 34 the tubular inlet and outlet areas 29 ; 31 does not form a pipe bend with a continuous curvature, but at least in an area formed by the flow directions in the inlet and outlet area, it has an angular configuration (see kink 36 ; 37 ). The openings 32 ; 33 can also be non-centered in the areas A2; A3 lie.

4 shows an embodiment, wherein the swirling chamber 17 is executed in the geometry of a shock two box-shaped tubes. Again, two surfaces A2 each have the openings 32 ; 33 on. Again, the change of direction in the area of existing or "imaginary" shock 34 of inlet and outlet area (sharp) edged (see kink 36 ; 37 ). The openings 32 ; 33 may again be arranged asymmetrically in the areas A2.

5 shows an embodiment, wherein the swirling chamber 17 in the geometry of a cuboid, in special execution as in 4 as a cuboid equal side edge lengths, is executed. In this case, two adjacent surfaces A2 each have the openings 32 ; 33 on. Here, too, the direction change in the area of the "imaginary joint" (34) of the inlet and outlet area (sharp) is edged (see kink 36 ; 37 ). Again, the openings 32 ; 33 again be arranged asymmetrically in the areas A2.

01

component Roller, anilox roller, cylinder, forme cylinder

02

Controlled system, tempering

03

Circulation, first; Secondary circuit

04

Circulation, second; Primary circuit

05

connection

06

Juncture first

07

Actuator Valve

08

Juncture second

09

Valve, Differential pressure valve

10

junction

11

Drive, Pump, turbine

12

flow path

12.1

Section, first

12.2

Section, second

12.3

Section, third

13

Return path

14

leg

15

connection

16

feed point, Injection site

17

A turbulence, swirl

18

temperature control cabinet

19

20

21

Control device, control process

22

destination

23

Connection, solvable

24

Connection, solvable

25

26

Management, Piping, hose

27

Entry, Execution, Rotary union

28

29

inlet area

30

31

outlet

32

Opening, inlet

33

Opening, outlet

34

surge line

35

36

kink

37

kink

A1 to A3

Surfaces, cross-sectional area

K1 to K3

node

M1 to M4

measuring points

R1 to R3

regulator

S1 to S4

sensors

T _ei

time constant (Index i denotes the control loop)

T _Li

Running time, Fluid (index i denotes the control loop)

T ' _L3

Running time, Temperature response at sensor S3

T _v

Temperature, flow temperature

V _{(i) WF}

pilot member regarding heat flow (Index i denotes the control loop if necessary)

dθ _i

Size, output size

Δθ _i

deviation

θ _i

Temperature, Measured value (index i denotes the control loop)

θ ' _{i, should}

Setpoint, theoretically (index i denotes the control loop)

θi is intended to k

corrected Setpoint (index i denotes the control loop)

Δ

adjusting command

Ap

difference in the pressure level

Claims (18)

Verwirbelungsstrecke ( 17 ) in a controlled system ( 02 ) for the temperature control of a component ( 01 ) of a printing machine, characterized in that the Verwirbelungsstrecke ( 17 ) in direct sequence has a cross-sectional enlargement, a change in direction and a cross-sectional reduction. Verwirbelungsstrecke ( 17 ) according to claim 1, characterized in that the Verwirbelungsstrecke ( 17 ) in a controlled system ( 02 ) for the temperature control of a component ( 01 ) is arranged a printing press. Verwirbelungsstrecke ( 17 ) according to claim 1, characterized in that the Verwirbelungsstrecke ( 17 ) between a feed point ( 16 ) and the component ( 01 ) is arranged. Device for tempering a component ( 01 ) of a printing press by means of a fluid whose temperature at a feed point ( 16 ) is variable, characterized in that in a controlled system ( 02 ) between a feed point ( 16 ) and the component ( 01 ) a Verwirbelungsstrecke ( 17 ) is arranged. Apparatus according to claim 4, characterized in that the Verwirbelungsstrecke ( 17 ) in direct sequence has a cross-sectional enlargement, a change in direction and a cross-sectional reduction. Verwirbelungsstrecke ( 17 ) according to claim 1 or device according to claim 4, characterized in that the Verwirbelungsstrecke ( 17 ) as Verwirbelungskammer ( 17 ) is executed. Verwirbelungsstrecke ( 17 ) according to claim 1 or device according to claim 5, characterized in that in the cross-sectional enlargement, a cross-sectional area (A1) increases abruptly by at least a factor of 2 to a new cross-sectional area (A2). Verwirbelungsstrecke ( 17 ) according to claim 1 or apparatus according to claim 5, characterized in that the change in direction is 70 ° to 110 °. Verwirbelungsstrecke ( 17 ) according to claim 1 or device according to claim 5, characterized in that in the cross-sectional reduction, a cross-sectional area (A2) decreases suddenly by at most a factor of 0.5 to a new cross-sectional area (A3). Verwirbelungsstrecke ( 17 ) according to claim 1 or device according to claim 4, characterized in that the Verwirbelungsstrecke ( 17 ) between a feed point ( 16 ) and a first measuring point (M1) for the temperature in the region of an inflow path ( 12 ) is arranged. Verwirbelungsstrecke ( 17 ) or device according to claim 10, characterized in that the first measuring point (M1) with respect to a running time of the fluid T _L1 a maximum of 2 seconds from the injection point 16 is arranged remotely. Apparatus according to claim 4 and 10, characterized in that in the inflow section ( 12 ) a second measuring point (M2) is provided. Apparatus according to claim 12, characterized in that the second measuring point (M2) with respect to a running time of the fluid T _L2 farther away than halfway from the injection point ( 16 ) to the destination ( 22 ) is arranged. Apparatus according to claim 13, characterized in that measured values (θ ₁ ; θ ₂ ) of the two measuring points (M1; M2) of a common control device ( 21 ) are supplied. Verwirbelungsstrecke ( 17 ) or device according to claim 6, characterized in that an inlet and outlet area ( 29 ; 31 ) of the swirling chamber ( 17 ) in the form of two box-shaped tubes, and a joint line ( 34 ) of the inlet and outlet areas ( 29 ; 31 ) at least in one of the flow directions in the inlet and outlet ( 29 ; 31 ) formed plane kinkig bent ( 36 ; 37 ) are executed. Verwirbelungsstrecke ( 17 ) or device according to claim 6, characterized in that the swirling chamber ( 17 ) a tubular inlet and outlet area ( 29 ; 31 ), and a score line ( 34 ) of the tubular inlet and outlet areas ( 29 ; 31 ) at least in one of the flow directions in the inlet and outlet ( 29 ; 31 ) formed plane kinkig bent ( 36 ; 37 ) are executed. Verwirbelungsstrecke ( 17 ) or device according to claim 6, characterized in that the swirling chamber ( 17 ) in the geometry of a cuboid, which in two adjacent surfaces (A2) each having an opening ( 32 ; 33 ) for supplying or discharging the fluid. Verwirbelungsstrecke ( 17 ) according to claim 1 or device according to claim 4, characterized in that the component ( 01 ) as a roller ( 01 ) or cylinder ( 01 ) of a dampening-free offset printing unit is executed.