The invention relates to an arrangement on a printing press with a
Prozessmitteltemperiervorrichtung and a free cooler temperature control unit.
Operation of a printing press arises on different components
the printing press heat. This applies in addition to printing cylinders
also the resources, eg. As used in offset printing
Process agents, such as fountain solution and detergent, often over
fed to a circulatory system, discharged, processed
and used again. The resources of the printing press
preferably used at a certain temperature for use.
If the operating temperature is above a certain value,
This can lead to a deterioration in print quality.
Use of fountain solutions is added that these are not insignificant
Part of alcohol that can contain at high temperatures
undesirable to evaporate quickly. The composition
of dampening solution can therefore change at too high a temperature,
that it comes to rest outside of a predetermined target range.
are therefore often equipped with temperature control.
These can both for the temperature of the process agent
as well as for the temperature control of the functionally essential parts
the printing press, in particular the impression cylinder, are used.
Tempering will usually mean cooling, however
is also quite a warming into consideration, for example
in the start-up phase of a printing press.
Operation of appropriate tempering is relatively expensive, in particular
because of the energy required, for example, for
the operation of a chiller or an electric
Heating device is needed.
To reduce the required energy to be used z. B. in the DE 10 2005 015 954 A1
proposed for temperature control of dampening solution to provide the dampening solution circuit with an additional heat exchanger, which communicates with a free-cooler temperature control unit. By free-cooler temperature control device is meant a device that exploits approximately the temperature of the ambient air.
present invention is based on the object, an arrangement
to create a printing press that allows unnecessary
Energy costs to avoid, the arrangement favorable
manufacture and operate is.
The object is achieved by the arrangement according to the main claim
solved. Advantageous embodiments are the subject
the dependent claims.
Aspect of the invention relates to an arrangement on a printing press
comprising a process-medium tempering device, at least one process-fluid line,
which the process agent tempering device and the printing press
connects, and in addition to the process agent tempering device
provided freecooler temperature control, wherein the
Freecooler temperature control unit in the process fluid line
it is provided that it depends on the process agent to be cooled
is flowed through. With process agents are any fluids
referred to, which supplied to the operation of printing machines this
be and / or circulated in the printing presses, in particular
Dampening water cleaner, gear oil and / or other
Fluids used for cooling certain components
become. With process agent, however, is no temperature control, such as.
As the usually used in refrigerators
Refrigerants (eg R407c, R143a, R410a), meant in
a separately provided Temperiermittelkreislauf application
which is used to cool a process agent
becomes. By free-cooler temperature control unit is meant
a device that uses about the temperature of the ambient air,
to cool the process agent. The objective
Arrangement has the advantage that no separate Temperiermittelkreislauf
for the free cooler temperature control unit and
thus no heat exchanger between such a temperature control circuit
and the process agent leading process line needed
is. Consequently, the arrangement is cheaper to manufacture
and has an increased efficiency. In the maintenance of the
Arrangement this has the further advantage that no separate level
a temperature control in the free cooler temperature control
must be observed. A free cooler temperature control unit
can also operate at low cost and, if
the free cooler temperature control unit directly from the process agent
is flowed through, the efficiency of the temperature
improved. If a sufficient temperature difference between
Ambient air and process fluid temperature is given, the
intended temperature may be alone or
at least mostly by exploiting the outside temperature
Preferred is an arrangement in which the process fluid line is a return line, which runs from the printing machine to the process temperature tempering device. It is particularly preferred if the return line is part of a process fluid circuit. In the return line of a Circuit, the process temperature is usually the highest, so that a good temperature control can be achieved here. It is also conceivable, however, that the process-fluid line from the process-temperature-tempering device leads to the printing press and is not part of a cycle.
is preferred if the arrangement further comprises a blowing device,
which is arranged such that the free cooler tempering with
an air flow is flowed. This can be at the same
Temperature difference between ambient air and process agent
larger process medium flow per unit time cooled
Advantageously, an arrangement is further considered, in which the free cooler temperature control can be deactivated
is when the temperature of the process agent in the section of
Process fluid line, which from the printing press to free-cooler temperature control unit
is higher than the air temperature of the air, which
used for cooling the free cooler temperature control unit
is an arrangement which also has a bypass,
by which process means can be conducted past the freecool temperature control unit
Preferred design of such an arrangement further comprises
Valve, via which a process medium flow in the
Freecooling temperature control unit or the bypass line
can be introduced or to the free cooler temperature control unit
and the bypass is redistributable.
is also an arrangement which further comprises a first temperature sensor
which is designed and arranged such that over the
first temperature sensor, the process temperature can be detected
is, wherein the valve and / or the blowing device in dependence
the detected process means temperature controlled and / or regulated
is also an arrangement which further includes a second temperature sensor
which is designed and arranged such that over the
second temperature sensor the air temperature detectable
is, which for the temperature of the free cooler temperature control
serves, wherein the valve and / or the blowing device in dependence
the detected air temperature is controllable and / or regulated.
Another preferred embodiment is directed to an arrangement in
the free cooler temperature control unit in a room
a building is arranged in which the printing press
is set up.
is preferred if in the arrangement of the free cooler temperature control
is arranged outside a building in which
the printing press is set up.
is conceivable different free-cooler temperature control
to provide in different places, the z. At different times of day
and / or seasons depending on the respective ambient air temperature
can be switched on and / or off.
Another aspect of the invention relates to an arrangement on a printing press
comprising, a process fluid line and a freecooler temperature control device,
wherein the free cooler temperature control such in
the process fluid line is provided that it from the to be cooled
Process fluid is flowed through, and that at the printing press
for the of the free cooler temperature control unit
to be cooled process fluid stream except the free cooler temperature control unit
no additional temperature control devices are provided.
With free cooler temperature control unit is in relation to
This aspect of the invention means a device that exclusively
exploits the free or forced convection of a gas to that
Cooling process agent, as well as for the
previous aspect of the invention may apply. Such a thing
Freecooler temperature control unit therefore has no additional
Cooling circuit, via a tempered temperature control
causes a heat exchange with the process agent. Furthermore
are, as far as conceivable, in relation to this further aspect
the invention also with respect to the first aspect of the invention
as preferred embodiments described as preferred
considered. This aspect is especially beneficial if to everyone
conceivable operating time of the printing press the temperature difference
between ambient air and the process medium temperature is sufficiently high.
In this case, the intended temperature control alone by
Exploitation of the outside temperature can be achieved. This is special
in areas where year-round a sufficient
low outside temperature prevails or if the process medium temperatures,
on which the process agent is to cool, sufficient
In the following, individual particularly preferred embodiments of the invention will be described by way of example. Some of the described embodiments have features that are not necessarily required to practice the present invention, but are generally considered preferred. Thus, embodiments are also considered to be covered by the teaching of the invention, which does not have all the features of the embodiments described below. Equally it is conceivable to have characteristics that are different in relation to each other Embodiments are described to combine selectively with each other.
1 shows a schematic representation of a preferred embodiment of an inventive arrangement.
2 shows a schematic representation of another preferred embodiment of a free cooler temperature control of an inventive arrangement.
3 shows a schematic representation of another preferred embodiment of a free cooler temperature control of an inventive arrangement.
In 1 is a printing press 1 illustrated, to which a Prozeßmitteltemperiervorrichtung 2 in or over a process means circle 7 is connected, which has a flow and a return and which serves for controlling the temperature of the process means in a manner not shown. A second connection between the printing press 1 and the process agent tempering device 2 has a process fluid circuit 3 on, which is also a feed line 6 and a process line line configured as a return line 5 includes and serves to cool the process agent. It is conceivable that the fluids, which the process means circle 7 and the process fluid circuit 3 flow through, different components of the printing press 1 cool. Furthermore, it is conceivable that in the process means circle 7 and the process fluid circuit 3 different fluids are used.
It is also conceivable that the process fluid circuit 3 the supply of one or more cleaning devices and / or one or more fountain solution devices is used and / or used for cooling the impression cylinder.
in this respect
It is a widespread arrangement of printing presses
with tempering devices.
Furthermore, according to the invention, a freecooler temperature control unit is provided 4 intended. With free cooler temperature control unit 4 With reference to the described embodiments, it is meant a device which exclusively utilizes the ambient air to cool the processing means. For this purpose, the free cooler temperature control 4 preferably an air - having process - heat exchanger, z. B. in the form of an air cooler. It may be sufficient if the heat exchanger is a passive convection heat exchanger. It is also conceivable that ambient air or other gases, such. B. compressed air, be actively blown on cooling elements of the heat exchanger.
In 2 is an embodiment of the free cooler temperature control 4 shown in which a blowing device 41 , preferably an impeller, allows external air to pass over a process agent chamber. It is also conceivable that the blowing device 41 is designed as a suction device, which air z. B. sucks by cooling fins of the heat exchanger.
This process chamber is part of the process fluid circuit 3 , which is flowed through directly from coming from the printing press process means, which subsequently to an additional Prozeßmitteltemperiervorrichtung 2 is forwarded.
Furthermore, a control unit 46 provided by two temperature sensors 44 . 45 the temperature difference between the air temperature and the temperature of the process medium is determined and the blowing device is dependent on this temperature difference 41 controls (on / off and / or speed).
In 3 is still an embodiment of the free cooler temperature control 4 shown in addition to the blowing device 41 a bypass line 43 is provided.
In this particularly preferred embodiment, the process medium may be partially or completely passed through the bypass line, for. B. when the process temperature is above the air temperature. This is a valve 42 provided, which via the control unit 46 is controllable. Depending on the design, the valve can 42 z. B. be designed as a proportional valve, so that the amount of the volume flow is adjustable, or z. B. as a three-way valve, so that a pure switching function is given.
It is also conceivable that the aspect of the bypass 43 without a blowing device 41 is realized.
Furthermore, it is conceivable that further temperature sensor, for. B. in the leading away from the free cooler temperature control line, in addition to one of the described temperature sensor 44 . 55 or alternatively to one or both temperature sensors 44 . 55 be provided.
- Process medium circuit
- Free cooler temperature control
- bypass line
- control unit
- Process medium line
- Process center circle
QUOTES INCLUDE IN THE DESCRIPTION
The documents listed by the applicant have been automated
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Patent or utility model application. The DPMA takes over
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Cited patent literature
- DE 102005015954 A1