Monitoring device for monitoring a processing system and processing system for coating a workpiece

Abstract

The invention relates to a monitoring device (100) for monitoring a treatment system (200) for coating, in particular spraying, workpieces, in particular vehicle bodies with a coating medium, comprising at least one first pressure measuring device (40) for installation in a filter unit (20), according to the invention, the monitoring device comprises at least one second pressure measuring device (40, 60) which is arranged in the exhaust air collection channel (80) and which is located downstream of the plurality of filters (30) of the filter unit (20) in the normal flow direction (90), and the monitoring device comprises at least one second pressure measuring device (60) which is arranged in the exhaust air collection channel (80) and by which a pressure difference relative to the atmospheric pressure of the surroundings of the filter unit (20) is determined.

Description

Technical Field

[0001] The invention relates to a monitoring device for monitoring a treatment system and to a treatment system for coating a workpiece, in particular for spraying a workpiece, in particular a car body. Background Art

[0002] Treatment systems for coating, in particular spraying, workpieces, in particular vehicle bodies, usually comprise several filter units through which flows flow in parallel in order to collect paint particles resulting from so-called overspray.

[0003] In order to maintain a defined air balance in the process chamber of a spray booth, the loaded filter units must be replaced from time to time to ensure that the air is sufficiently clean.

[0004] The point in time for replacing the filter unit can be monitored and determined based on various criteria.

[0005] The number of workpieces painted during the service life of the filter can be used as a criterion. This is based on the inference of the current load state of the filter unit from the empirical value of the filling height as a function of the number of painting cycles. The filter unit can be replaced when a predetermined number of painted workpieces has been reached. During commissioning, the relationship between the number of painting cycles and the load state of the filter element during its service life must first be determined. This can take a relatively long time, especially since during the start-up phase of a new treatment system, usually only a small number of vehicle bodies are treated. The time for replacement is determined solely on the basis of empirical values ​​for the filter state at a certain number of cycles.

[0006] Another possible criterion for replacing the filter units can be to measure the volume flow indirectly by recording the pressure difference per filter unit, the recording being carried out via the filter units themselves or via a flow resistance (e.g. an orifice plate) assigned to the filter units in terms of flow technology. Replacement is then carried out when a predetermined pressure value or volume flow value is exceeded or fallen below.

[0007] However, it is difficult to find a suitable measuring position at which firstly sufficiently uniform flow conditions exist and secondly no excessive contamination with paint particles can be expected. Furthermore, filter replacement cannot be planned in advance, since the volume flow through an individual filter unit does not represent a criterion for overall replacement. As long as sufficient air flows through the other filter modules, replacement is not necessary. Only when the sum of the volume flows falls below the rated value does it become apparent that a filter unit must be replaced, i.e. the filter unit with the lowest flow rate.

[0008] Another possible criterion for replacing the filter units may be to measure the static pressure or the dynamic pressure immediately downstream of each filter unit, wherein if a predetermined pressure value is exceeded or fallen below, the filter unit may be replaced.

[0009] However, this does not allow for planning of filter changes in advance, since the pressure after a single filter unit does not represent a criterion for overall change. As the flow rate decreases, the static pressure downstream of the filter unit approaches the pressure in the exhaust air collection channel. Of course, the static pressure can be varied, as long as the recirculation fan is able to compensate for the increased flow resistance of the filter by increasing the speed. A comparison of the measured values ​​of different filter units only shows the filter unit with the highest flow resistance.

[0010] Another possible criterion for replacing the filter units can be a combination of the measured pressure and the number of spraying cycles. In this way, the pressure difference of all filter units in the treatment system can be measured. In addition, the number of spraying cycles can be recorded within the service life of each individual filter unit. If the filter units as a whole exceed a predetermined pressure loss, the filter unit with the highest filling degree can be identified by evaluating the number of spraying cycles and its replacement can be scheduled.

[0011] However, during commissioning, the relationship between the number of spraying cycles and the load state of the filter element during its service life must first be determined. This can take a considerable time, especially since only a small number of vehicle bodies can usually be processed during the start-up phase of a new treatment system. Summary of the invention

[0012] The object of the present invention is to provide a monitoring device for monitoring a processing system for coating, in particular spraying, a workpiece, in particular a vehicle body, which monitoring device makes it possible to specify effective criteria for replacing a filter unit.

[0013] Another object of the invention is to provide a processing system with such a monitoring device for coating, in particular spraying, a workpiece, in particular a vehicle body, which processing system makes it possible to specify an efficiency standard for replacing a filter unit.

[0014] This object is achieved by the features of the independent claims.

[0015] Preferred embodiments and advantages of the invention are apparent from the further claims, the description and the drawings.

[0016] A monitoring device is proposed, which is used to monitor a processing system for coating, in particular spraying, a workpiece, in particular a car body, with a coating medium. The monitoring device comprises: at least one first pressure measuring device for installation in a filter unit, the first pressure measuring device being arranged downstream of multiple filters of the filter unit in a normal flow direction; and at least one second pressure measuring device arranged in an exhaust air collecting channel, wherein the pressure difference compared to the atmospheric pressure of the surrounding environment of the filter unit is determined by the pressure measuring device.

[0017] The proposed monitoring device can advantageously combine the measurement of the pressure loss of all filter units of the processing system as a whole with the measurement of the pressure of each filter unit individually. In this way, the measurement of the pressure loss of all filter units in the processing system as a whole can be used as a criterion for whether one or more filter units need to be replaced. When the maximum pressure difference is reached, at least one of the filter units must be replaced in order to reduce the total pressure loss and maintain the air volume flow. The individual measurement of the pressure of each filter unit can be used as a specific criterion for which filter unit needs to be replaced. The measurement after the filter unit with the greatest flow resistance due to the highest load shows the highest static pressure or the lowest dynamic pressure.

[0018] The pressure value used here is expediently the pressure difference compared to the ambient pressure of the treatment system. The static pressure difference is therefore negative, since the static pressure difference is determined on the suction side of the fan.

[0019] Thus, advantageously, there is a variable that can be easily recorded, which is essentially independent of empirical values ​​and is not available only when the treatment system is being commissioned. Advantageously, by observing the time course of the pressure difference until the pressure difference limit value is reached, it is possible to plan the replacement of the filter, i.e., the replacement of one or more of the filter units, in advance. When replacing one of the filter units, the current load situation of the filter unit that is not to be replaced is known and, if necessary, another replacement of the filter unit can be planned.

[0020] Advantageously, the monitoring device can be retrofitted to existing treatment systems.

[0021] According to a preferred design of the monitoring device, the monitoring device can also include a counting device for the filter unit to record the number and / or duration of the coating cycles that have been performed.

[0022] It is advantageous to use a very fluid coating medium which does not tend to remain stationary in the filter medium of the filter but tends to sink in the direction of gravity to the bottom region and accumulate there. This may not lead to a significant increase in the filter pressure loss, but there is still the risk of overloading the filter in this region and thus contaminating the system.

[0023] According to an advantageous design of the monitoring device, the first pressure measuring device and the second pressure measuring device can include: at least one pressure measuring instrument, in particular, the pressure measuring instrument is a pressure difference measuring instrument; a measuring sensor; and a connecting line between the measuring sensor and the pressure measuring instrument, in particular, the connecting line is a flexible connecting line. The measuring sensor is conveniently used to record the pressure value at a desired position in the filter unit. The pressure can be conducted to the pressure measuring instrument via a particularly flexible connecting line, which can be arranged at a convenient position in the filter unit or in the treatment system. According to an advantageous design of the monitoring device, the measuring sensor can have a measuring tube, in particular, a crank-shaped measuring tube, the free opening of which points in the flow direction. In order to meet the requirement of having a measuring sensor in the case where the measuring tube points downward and therefore in the flow direction, the measuring sensor can be designed with a crank-shaped tube, which has an opening with a low degree of contamination in the flow direction.

[0024] According to an advantageous design of the monitoring device, the measuring sensor can have a measuring pipe connection which is detachably connected to the housing of the filter unit. In particular, the measuring pipe connection can be designed to be magnetic. In this way, the measuring sensor for pressure measurement can be mounted at a convenient location on the filter unit and can be removed again once the filter unit is replaced, so that the measuring sensor can continue to be used for the replaced filter unit. The measuring sensor can also be easily removed for cleaning purposes.

[0025] According to an advantageous embodiment of the monitoring device, the measuring tube can have a connection joint for connecting the measuring tube to a connecting line. The connection joint can be used to conveniently connect the connecting line to the measuring tube. If necessary, the connecting line can be unplugged again to replace the measuring tube or the connecting line.

[0026] According to another aspect of the invention, a treatment system for coating, in particular painting, a workpiece, in particular a car body, with a monitoring device is proposed. The treatment system comprises: at least one treatment chamber, the treatment chamber having an inlet for supplying air into the treatment chamber; a plurality of filter units through which flow is passed in parallel and having at least one filter, the filter units filtering the air exhausted from the treatment chamber. The air filtered by the filter units is introduced into a common exhaust air collection channel. The monitoring device has at least one first pressure measuring device for each filter unit, the first pressure measuring device being arranged downstream of at least one filter of the filter unit. The monitoring device also comprises at least one second pressure measuring device, the second pressure measuring device being arranged in the exhaust air collection channel. The pressure difference compared to the atmospheric pressure of the surrounding environment is determined by the pressure measuring device.

[0027] The proposed treatment system has a treatment chamber, such as a spray booth, which is supplied with feed air via an inlet. The air flowing out of the treatment chamber is filtered by a plurality of filter units through which flow is passed in parallel, each filter unit having at least one filter. The filtered air flows from the filter units into a common exhaust air collection channel. The pressure measuring device of the monitoring device is arranged in each filter unit downstream of at least one filter and in the exhaust air collection channel.

[0028] In this way, the monitoring device can advantageously combine the measurement of the pressure loss of all filter units of the treatment system as a whole with the measurement of the pressure of each filter unit individually. In this way, the measurement of the pressure loss of all filter units in the treatment system as a whole can be used as a criterion for whether a filter replacement, i.e., whether one or more of the filter units needs to be replaced, is required.

[0029] When the maximum pressure difference is reached, at least one of the filter units must be replaced in order to reduce the total pressure loss and maintain the air volume flow. Individual measurements of the pressure of each filter unit can be used as a specific criterion for which filter unit needs to be replaced. The measurement after the filter unit with the greatest flow resistance due to the highest load shows the highest static pressure or the lowest dynamic pressure.

[0030] The pressure value used here is expediently the pressure difference compared to the ambient pressure of the treatment system. The static pressure difference is therefore negative, since it is determined on the suction side of the fan. Thus, there is advantageously a variable that can be easily recorded, which is essentially independent of empirical values ​​and is not available only when the treatment system is being commissioned.

[0031] Advantageously, by observing the time profile of the pressure difference until the pressure difference limit is reached, the replacement of the filter can be planned in advance. When replacing one of the filter units, the current load of the filter unit that will not be replaced is known and another replacement of the filter unit can be planned if necessary.

[0032] According to an advantageous embodiment of the treatment system, the treatment system can also include a counting device for each filter unit to record the number and / or duration of coating cycles that have been carried out. It can be advantageous to use a very fluid coating medium that does not tend to remain fixed in position in the filter medium of the filter, but tends to sink to the bottom area in the direction of gravity and accumulate there. This may not lead to a significant increase in the filter pressure loss, but there is still a risk of overloading the filter in this area and thus contaminating the system.

[0033] For coating media with different properties, such as paints, different standards may apply. A distinction must be made between "liquid" and "non-liquid" coating media (such as paints).

[0034] Liquid or highly fluid coating media can still flow in the filter, thus advancing downward in the filter structure, thereby gathering in the bottom area of ​​the filter unit and thus only slightly hindering the filter material from flowing through. However, when the load reaches a certain level, the filter element must be replaced in this case to prevent the filter from being "overloaded" and thus causing contamination of system components. In contrast, non-liquid coating media are no longer flowable in the filter. As the load of the filter increases, these media increasingly clog the filter structure and therefore significantly increase the flow resistance. In this case, the filter is replaced when the load reaches a certain level so that the volume flow required by the filter as a whole can continue to be maintained.

[0035] In terms of filter monitoring, the following two scenarios may occur depending on the coating characteristics.

[0036] When using a coating medium in which the filter loading is associated with a significant increase in the flow resistance, the overall pressure difference across all filter units of the treatment system or treatment area as a whole rises with increasing filter loading until a given rated value is reached or exceeded. When the rated value is reached or exceeded, a decision is made as to which trolley to replace based on the pressure measurement results for each filter unit.

[0037] When using very liquid / fluid coating media, it can happen that the coating media separated in the filter does not remain in the filter at the point where separation took place, but accumulates at the bottom of the individual filters of the filter unit due to the low viscosity of the coating media and gravity. Therefore, a significant increase in the overall pressure difference is not to be expected despite the load on the filter or filter unit. In this case, the replacement criterion is the coating media content per filter unit, which is counted with the aid of a counting device. This can in particular be a counting device, for example a trolley counter The counting device records the number of carriers (carriages) which carry the workpieces to be treated and are introduced into the treatment system for coating.

[0038] If one of the filter units in a treatment system or treatment area has a defined weight mark (e.g. B, 120 kg) which is related to the coating medium content, then this filter unit must be replaced. In this case, the calculation process can be based on the relationship between the number of coating cycles within the service life of the filter element and the load state of the filter element, which relationship is determined, for example, during commissioning and is generally linear. If, on the one hand, the measurement of the overall pressure loss over all filter units of the treatment system or treatment area as a whole is combined with the individual measurement of the pressure of each filter unit (trolley) and, on the other hand, a counting device (e.g. a trolley counter) is available, both scenarios can be reliably taken into account.

[0039] By means of the counting device, the number of coating cycles which have occurred during the use time of the filter unit so far can be recorded. Advantageously, a software module can be used which is assigned to the current position of the filter unit in the coating system and which establishes a reference relationship between the current counter reading and the counter setpoint value at which it can be assumed that the target weight specified for the filter unit has been reached with respect to the coating medium content.

[0040] Typically, the filter unit is docked to a specific location in the coating system or coating area, wherein the presence of the filter unit on the base is automatically detected, for example by a proximity switch. Optionally, the filter unit may additionally or alternatively have an identification device for identifying the individual filter units, such as an RFID chip, a barcode, etc.

[0041] For resetting the counting device, the counting device can be reset according to different criteria, if the replacement criterion is based on the coating cycle, ie taking into account, in particular additionally taking into account, the count value of the counting device.

[0042] The counter can be reset when the filter unit is unplugged from the base, ie from the position of the filter unit in the coating system or coating area. The signal is lost.

[0043] When the filter unit is redocked, it can be convenient to additionally check whether the filter has actually been replaced. For this purpose, a check can be carried out to determine whether the filter unit is docked with a completely unloaded or lightly loaded filter. This will usually be a different filter unit, but can also be the same filter unit if it has been fitted with a new filter in the meantime.

[0044] A less loaded filter results in lower measured values ​​for the first and second pressure measuring devices. In principle, therefore, both measured values ​​can be used for the check. In particular for liquid coating media, the first pressure measuring device is usually more sensitive because it is associated with a separate filter unit. Therefore, such a measurement can be preferably performed, but not necessarily.

[0045] Alternatively or additionally, the counting device can be reset manually, for example by resetting a counter on a visualization panel of the counting device.

[0046] Alternatively or additionally, the counter may be automatically reset. The RFID tag of each filter unit is detected and checked by means of an RFID reader on the base of the filter unit. If the RFID tag of the newly docked filter unit is different from the RFID tag of the previously docked filter unit, it can be assumed that the filter unit has been replaced and therefore the filter has been replaced.

[0047] Advantageously, the pressure can be measured for each filter unit and, based on the pressure difference before and after the filter unit is replaced, it can be detected whether the same filter unit is disconnected and reconnected or whether the filter is actually replaced. In the latter case, the counter can be automatically reset. Since even liquid or very fluid coating media (in particular paints) can be expected to experience a pressure drop during filter replacement, this is an advantageous criterion for resetting the counter device in the case of both liquid and non-liquid coating media, since docking of the same filter unit is detected.

[0048] According to an advantageous embodiment of the treatment system, the first pressure measuring device and the second pressure measuring device can comprise at least one pressure measuring instrument, in particular a pressure difference measuring instrument, a measuring sensor and a connecting line, in particular a flexible connecting line, between the measuring sensor and the pressure measuring instrument. The sensor is suitably used to record the pressure value at a desired location in the filter unit. The pressure can be conducted via the in particular flexible connecting line to the pressure measuring instrument, which can be arranged at a convenient location in the filter unit or in the treatment system.

[0049] According to an advantageous embodiment of the processing system, the measuring sensor can have a measuring tube, in particular a crank-shaped measuring tube, the free opening of which points in the flow direction. In this way, static and dynamic pressure values ​​can be reliably determined.

[0050] According to an advantageous embodiment of the treatment system, the measuring sensor can be arranged in the exhaust air duct of the filter unit downstream of at least one filter of the filter unit. Advantageously, the pressure loss after the at least one filter can be determined in areas where the flow air is less loaded with paint, so that the measuring sensor has a good service life before it has to be replaced.

[0051] According to a favorable design of the processing system, the filter unit can have at least two filters stacked one above the other in the vertical direction, and the air flows through the filters in parallel. The filtered air is vertically directed downward to the outlet in the exhaust air duct, and the outlet is vertically arranged below at least two filters. Here, the measuring sensor is arranged at the height of the upper filter of at least two filters in the area of ​​the exhaust air duct. In order to measure the pressure difference with low pollution, the measuring position is suitable for being located in the upper area of ​​the filter unit. At this position, the paint load is expected to be less, because the filtered air of a single filter is sucked downward, so the measuring sensor only contacts the filtered air from the upper filter. According to a favorable design of the processing system, the filter unit can have at least two filters arranged adjacent to each other in the horizontal direction. Wherein the measuring sensor is arranged in the area between at least two filters of the exhaust air duct. At this position, the paint load is expected to be less, because the filtered air from a single filter is sucked downward, so the measuring sensor only contacts the filtered air from the upper filter.

[0052] According to an advantageous embodiment of the treatment system, the housing of the filter unit can have an opening for allowing the measuring sensor, in particular the measuring tube, to pass through the opening into the housing. The measuring sensor can thus be mounted on the filter unit in a simple manner and can be easily removed when the filter unit is replaced or cleaned.

[0053] According to an advantageous design of the processing system, the housing can have an adapter plate with an opening. In particular, the opening can be designed as an asymmetrical elongated hole. Alternatively or additionally, the adapter plate can have a locating pin for locating the measuring sensor. In order to ensure the correct alignment of the measuring sensor, it is more reasonable to design the opening for the measuring sensor as an asymmetrical slot (for example so that one end of the long hole ends at a right angle) or to provide a locating pin.

[0054] According to an advantageous embodiment of the processing system, the measuring sensor can have a measuring connection for detachable connection to the housing, in particular to the adapter plate. In particular, the measuring connection can be designed to be magnetic. This makes it easy to mount the measuring sensor on the filter unit and to remove it when replacing the filter unit or cleaning it.

[0055] According to an advantageous embodiment of the processing system, the measuring tube can have a connection joint for connecting the measuring tube to a connecting line. When the measuring tube is normally installed, the connection joint is arranged outside the housing. The connecting line can be conveniently connected to the measuring tube using the connection joint. If necessary, the connecting line can be unplugged again to replace the measuring tube or the connecting line.

[0056] According to an advantageous embodiment of the treatment system, the filter unit can be designed to be replaceable. The pressure measuring device is arranged on the part connected to the treatment system, in particular on the insertion device for the filter unit. In this way, the filter unit can be easily replaced by removing the measuring sensor with the connecting line from the filter unit and allowing it to rest on the pressure measuring device installed on the treatment system.

[0057] According to an advantageous embodiment of the processing system, the insertion device can have a receptacle for a measuring sensor. In particular, the insertion device can have a receptacle for a magnetic measuring connection. During the replacement of the filter unit, the sensor can be temporarily accommodated in the receptacle to avoid further interference with the replacement process.

[0058] According to an advantageous embodiment of the processing system, when the measuring sensor is accommodated in the receptacle, at least a portion of the connecting line with the measuring sensor can be arranged in the vertical direction. In the vertical frame area of ​​the insertion device, there can be a receptacle for a magnetic measuring pipe connection, which can be hung in a kind of parking position during the replacement of the filter unit, thereby ensuring that the flexible connecting line (for example a pressure hose) runs vertically downward in a slender manner along the vertical frame area without being looped.

[0059] According to another aspect, a method for operating a treatment system with a monitoring device is proposed, which treatment system coats a workpiece with a coating medium, in particular a spray-coated workpiece, in particular a car body. The treatment system comprises a treatment chamber with an inlet for supplying air into the treatment chamber, and a plurality of filter units with at least one filter through which flow is passed in parallel, the filter units filtering the air discharged from the treatment chamber, wherein the air filtered by the filter units is introduced into a common exhaust air collection channel. The monitoring device has at least one first pressure measuring device for each filter unit, which is arranged downstream of at least one filter of the filter unit, and at least one second pressure measuring device, which is arranged in the exhaust air collection channel, wherein the pressure difference compared to the atmospheric pressure of the surroundings of the filter unit is determined by the pressure measuring device. In addition, the monitoring device can have a counting device, which determines the number and / or duration of coating cycles that have been carried out by the filter unit.

[0060] The method is used to determine at least one criterion for replacing a filter unit, wherein the criterion comprises at least one of the following variables: a first limit value of a first pressure measuring device of the filter unit, a second limit value of a second pressure measuring device of the treatment system, a limit value of the number and / or duration of coating cycles that the filter unit has carried out, determined in a counting device of the filter unit. The method is also used to output a signal for replacing at least one filter unit if at least one criterion is met.

[0061] According to an advantageous design of the method, a signal to replace the filter unit can be output when the measured value of the second pressure measuring device exceeds the second limit value and the measured value of the first pressure measuring device of one filter unit has the highest value among the first pressure measuring devices of multiple filter units. Alternatively, a signal to replace the filter unit can be issued if the measured value of the first pressure measuring device of the filter unit exceeds the first limit value. Alternatively, a signal to replace the filter unit can be issued if the number and / or duration of coating cycles that have been performed in the filter unit exceeds the limit value. In this way, the replacement interval of the filter unit can be adjusted depending on whether a highly fluid or non-liquid coating medium is used in the treatment system, so that the treatment system can be advantageously operated according to various predetermined criteria.

[0062] According to an advantageous embodiment of the method, the counting device is reset when the filter unit is removed from the treatment system and when the measured value of the first pressure measuring device and / or the second pressure measuring device is determined to be low when the filter unit is reconnected to the treatment system, and / or the counting device is reset by manually resetting the counting device and / or the counting device is reset by automatically detecting a signal of the filter unit when the filter unit is docked to the treatment system. This ensures that the current value of the counting device can be used as a criterion for replacing the filter unit.

[0063] According to a preferred embodiment of the method, the criteria for replacing the filter unit, in particular the limit values ​​of the first pressure measuring device and the second pressure measuring device and the number and / or duration of the coating cycles that have been carried out, can be defined as a function of predeterminable input variables for the operation of the treatment system, in particular as a function of costs and / or CO2 emissions. Depending on the predetermined input variables, the treatment system can be operated in a cost-optimized and / or environmentally friendly manner.

[0064] According to an advantageous design of the method, the pre-given input variables may include at least one of the following variables: electricity price, filter price, personnel costs for each filter change, disposal costs for each filter or filter unit, carbon dioxide emissions per kilowatt-hour of electricity or per filter, in particular, the carbon dioxide emissions include the production and disposal of the filter.

[0065] By means of the optimization calculation, the pressure difference value with the lowest annual operating costs can be specified as the criterion for filter replacement. According to an advantageous embodiment of the method, the criterion for replacing the filter unit can be adjusted on the basis of current and / or past operating data of the treatment system. In particular, the criterion can be adjusted on the basis of automatically recorded operating data and / or manually entered operating data. In particular, the additionally used operating data can be advantageously used to derive the requirements for consumables, personnel costs or energy from the criterion.

[0066] According to another aspect of the present invention, a computer program product is proposed, comprising commands, which, when executed by a computer, at least cause the computer to: when a processing system for coating, in particular spraying, a workpiece, in particular a car body, with a coating medium is running, in particular automatically determine at least one criterion for replacing a filter unit, wherein the criterion includes at least one of the following variables: a first limit value of a first pressure measuring device of the filter unit, a second limit value of a second pressure measuring device of the processing system, a limit value of the number and / or duration of coating cycles performed by the filter unit; when at least one criterion is met, in particular when the measured value of the first pressure measuring device of the filter unit exceeds the first limit value and / or when the measured value of the second pressure measuring device exceeds the second limit value and / or when the number and / or duration of coating cycles performed by the filter unit exceeds the limit value, output information for arranging replacement of one or more filter units.

[0067] Advantageously, the proposed computer program product can include a software module that controls the processing system so that the criteria for replacing consumables (e.g. filters of a filter unit) are automatically adjusted regularly or continuously so that the operating expenses (e.g. costs or CO2 emissions) are minimized. The criteria can be adjusted here, for example, by calculating the total expenditure based on predeterminable input variables, such as the price of electricity, the price of filters, the personnel costs per filter replacement, the disposal costs per filter, or, for example, the corresponding values ​​of CO2 emissions per kilowatt-hour of electricity or per filter (including production and disposal).

[0068] Furthermore, the criteria can be adjusted using current or in particular past operating data which provide information on changes in the expenditures associated with the criteria. This can involve automatically recorded operating data, such as continuously recorded pressure differences, in particular pressure loss measurements of all filter units in a treatment system or treatment area as a whole with individual pressure measurements of each filter unit, and / or manually entered operating data, such as the filter load after a filter unit has been replaced.

[0069] The additionally used operating data can be used in particular to derive the requirement for consumable materials, personnel costs or energy from this according to standards.

[0070] For example, historical data can be the increase in the pressure loss on the filter as a function of the number of process cycles (e.g. the number of coating cycles). Based on this curve, it is possible to calculate, for example, how often the filter needs to be replaced per year if the filter is replaced at certain pressure differences. At the same time, the annual energy requirement required to overcome the pressure differences under these scenarios can be calculated.

[0071] The annual operating costs can then be determined based on the pressure difference criterion by weighting the requirements using predeterminable input variables, such as the price of the filter, the costs of replacing the filter (personnel costs) and the electricity price. By means of an optimization calculation, the pressure difference value that results in the lowest annual operating costs can be assigned as the criterion for replacing the filter. By continuously recording the pressure increase as a function of the number of coating cycles, it is possible, for example, to react directly to changes in the basic coating process. For example, due to the use of different coating media (such as paint), the pressure loss can rise significantly faster or slower, so that more or fewer filters are consumed accordingly, the costs of which correspond to the energy costs.

[0072] In order to enable the standard to be adjusted automatically, it may be advantageous to fully utilize the limits of the standard at least once, as far as is technically possible, in order to create a data basis for the optimization calculation. For example, it may be advantageous to replace the filter unit at least once only when the maximum permissible pressure difference is reached, in order to determine the rate of increase of the pressure difference as a function of the number of coating cycles.

[0073] According to another aspect of the present invention, a device for data processing is provided, the device comprising a device for performing the following operations, in particular a device for automatically performing the following operations:

[0074] (a) determining at least one criterion for replacing the filter unit, wherein the criterion comprises at least one of the following variables: a first limit value of a first pressure measuring device of the filter unit, a second limit value of a second pressure measuring device of the treatment system, a limit value of the number and / or duration of coating cycles that have been performed on the filter unit;

[0075] (b) when at least one criterion is met,

[0076] In particular, when the measured value of the first pressure measuring device of the filter unit exceeds a first limit value, and / or

[0077] When the measured value of the second pressure measuring device exceeds a second limit value and / or when the number and / or duration of coating cycles performed on the filter unit exceeds a limit value, information for scheduling replacement of one or more filter units is output.

[0078] With such a data processing device, the processing system can advantageously be controlled according to defined criteria, so that, for example, environmental or cost considerations can be advantageously followed. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Other advantages come from the following description of the drawings. The drawings show embodiments of the present invention. The drawings, the description and the claims contain a large number of combined features. The technician will also appropriately examine each feature separately and combine it into other meaningful combinations.

[0080] Wherein by way of example:

[0081] Figure 1 A processing system with a monitoring device according to an embodiment of the present invention is shown, the processing system being used for coating a workpiece, in particular spraying a workpiece, in particular the workpiece being a vehicle body;

[0082] Figure 2 shows a longitudinal section of a filter unit with a pressure measuring device according to one embodiment of the present invention;

[0083] Figure 3 is a longitudinal section of a measuring sensor of a pressure measuring device installed in the housing of the filter unit;

[0084] Figure 4 is a plan view of an adapter plate of a housing of a filter unit, the adapter plate having an opening for a measuring sensor;

[0085] Figure 5 The basis for installing a measuring sensor Figure 4 A plan view of an adapter plate;

[0086] Figure 6 is a plan view of a filter unit equipped with a pressure measuring device in a plug-in device of a treatment system;

[0087] Figure 7 is based on Figure 6 A plan view of a filter unit, wherein the pressure measuring device is in a receptacle on the insertion device;

[0088] Figure 8 is a flow chart of a method according to one embodiment of the present invention;

[0089] Fig. 9 is a flow chart of a method according to another embodiment of the present invention; and

[0090] Fig.10 The invention relates to a data processing device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0091] The drawings show examples only and are not to be construed as limiting.

[0092] Before describing the present invention in detail, it should be noted that the present invention is not limited to the corresponding components of the device and the corresponding method steps, because these components and methods can vary. The terms used herein are intended only to describe specific embodiments and are not restrictive. In addition, unless the entire context clearly indicates otherwise, when the specification or claims use singular or indefinite articles, it also refers to the plural form of these elements.

[0093] Directional terms used below, such as "left", "right", "top", "bottom", "front", "rear", "after", etc., are only to help understand the drawings and are not intended to represent general limitations in any way. The components and elements shown, their design and use may vary according to the considerations of the technician and may be adapted to the corresponding application.

[0094] Figure 1 A processing system 200 with a monitoring device 100 according to an embodiment of the invention is shown, the processing system 200 being used for coating a workpiece, in particular for spray painting a workpiece, in particular a car body.

[0095] The treatment system 200 comprises a treatment chamber 10 having an inlet 12 for supplying air into the treatment chamber 10, and four filter units 20 through which flow is passed in parallel, each filter unit 20 having at least one filter 30, the filter units 20 filtering the air discharged from the treatment chamber 10. The air filtered by the filter units 20 is introduced into a common exhaust air collection channel 80, and the air flows out of the exhaust air collection channel 80 through an outlet 82. The flow direction 90 is marked by an arrow.

[0096] The monitoring device 100 has at least one pressure measuring device 40 for each filter unit 20, which is arranged downstream of the at least one filter 30 of the filter unit 20. In addition, the monitoring device 100 has at least one pressure measuring device 60, which is arranged in the exhaust air collecting channel 80. The pressure measuring devices 40, 60 each determine the pressure difference compared to the ambient atmospheric pressure.

[0097] The monitoring device 100 further comprises a counting device 70 for each filter unit 20 for recording the number and / or duration of coating cycles that have been carried out.

[0098] Figure 2 A longitudinal section through a filter unit 20 with a pressure measuring device 40 according to one embodiment of the invention is shown.

[0099] The filter unit 20 designed as a movable carriage or trolley has, for example, six filters 30, three of which are arranged one above the other in the vertical direction L, and two of which are arranged horizontally adjacent to each other. The housing 26 of the filter unit has corresponding inlets 22 so that the filters can be flowed through by air in parallel. The flow direction 90 is indicated by an arrow.

[0100] The path of the air to be filtered from the processing chamber 10 through the filter unit 30 has a U-shape. The air of the painting booth flows horizontally into the filter unit 20 and flows through the filter 30 first.

[0101] The air from the paint booth then flows through the filter mats that are stretched out behind the filter and is only then deflected downwards on the rear side of the housing 26 in order to leave the housing 26 again in the bottom region of the housing 26, also horizontally, but in the direction opposite to the inflow direction, in the direction of the exhaust air collecting channel 80. The filtered air is thus guided downwards in the exhaust air duct 28 behind the filter 30 in the vertical direction L to the outlet 24, which is arranged below the filter 30 in the vertical direction L.

[0102] For low-pollution differential pressure measurement, it is suitable to arrange the measuring position in the upper region of the filter unit 30, at the level of the two uppermost filters 30, more precisely centrally. In this position, less paint load is to be expected, since the filtered air from the individual filters 30 is sucked downwards and the measuring sensor 42 therefore comes into contact only with the filtered air from the two uppermost filters 30.

[0103] The measuring sensor 42 of the pressure measuring device 40 is therefore expediently arranged in a region of the exhaust air duct 28 at the level of the two upper filters 30 , downstream of the two filters 30 .

[0104] In the lower part of the filter unit 20, a counting device 70 for recording the number and / or duration of coating cycles performed is symbolically shown. Advantageously, the detection of the number and / or duration of coating cycles performed can be performed not in a physical counting device 70 arranged in the filter unit 20, but can be performed by a control system (PLC) based on a signal provided by the control of a coating system outputting the coating medium, such as a spraying robot.

[0105] With the help of the counting device 70, a count of coating cycles that have occurred during the up to now usage time of the filter unit 20 can be recorded. Typically, the filter unit 20 is installed at a specific location in the coating system 200 or coating area, where the presence of the filter unit 20 on the base is automatically detected. For this purpose, the filter unit 20 can optionally have an identification device, such as an RFID chip, a barcode, etc.

[0106] In the case where the replacement criterion is based on a coating cycle, i.e. taking into account, in particular additionally taking into account, the count value of the counter 70, the counter 70 can be reset based on different criteria. Preferably, the counter 70 is reset when the filter unit is reconnected after removal if the pressure measured after reconnecting the filter unit 20 is lower than before the filter unit was removed. If the pressure does not drop after removal and reconnection of the filter unit, it can be assumed that the same filter unit 20 has been reconnected, that is, no replacement has been performed.

[0107] In the latter case, the counter 70 can be automatically reset. Since even flowing or very flowing coating media (in particular paints) can experience a pressure drop during filter replacement, this is also a favorable criterion for resetting the counter 70 in the case of flowing and non-flowing coating media, since docking of the same filter unit 20 is detected.

[0108] Alternatively or additionally, the counting device 70 can be reset manually, for example by resetting a counter on a visualization panel of the counting device 70 .

[0109] Alternatively or additionally, the counting device 70 may be automatically reset. Using an RFID reader on the filter unit base, the RFID tag of each filter unit 70 is detected and checked. If the RFID tag of the newly docked filter unit 70 is different from the RFID tag of the previously docked filter unit 70, it can be assumed that the filter unit 20 has been replaced, and therefore the filter has been replaced.

[0110] Figure 3 A longitudinal section through a measuring sensor 42 of a pressure measuring device 40 , which is installed in a housing 26 of a filter unit 20 , is shown.

[0111] The housing 26 of the filter unit 20 has an opening 32 , so that the measuring sensor 42 can pass through the opening into the housing 26 .

[0112] Advantageously, the measuring sensor 42 can be equipped with a pressure measuring tube 44 which is designed as a crank-shaped measuring tube 44 and which points downward in the vertical direction L and thus has an opening 45 with a low degree of contamination in the flow direction 90. In order to meet the requirements of the measuring position with the measuring tube 44 pointing downward and thus in the flow direction 90, the measuring sensor 42 has a crank-shaped measuring tube bent at 90°.

[0113] The measuring tube 44 has a connection nipple 46 for connecting the measuring tube 44 to a connecting line 52 for pressure conduction. The connection nipple 46 is arranged outside the housing 26 when the measuring tube 44 is installed as intended.

[0114] The measuring sensor 42 is also expediently equipped with a magnetic measuring nipple 48 for detachable connection to the housing 26 of the filter unit 20 , so that it can be easily removed and reattached when the filter unit 30 is replaced and cleaned.

[0115] In order to ensure the correct alignment of the measuring sensor 42, it is more reasonable to design the opening 32 for the measuring sensor 42 as an adapter plate 34 with an asymmetric elongated hole (for example, one end of the elongated hole can end at a right angle) or to provide the adapter plate 34 with positioning pins.

[0116] Figure 4 The diagram shows a plan view of an adapter plate 34 of the housing 26 of the filter unit 20 , which adapter plate 34 has an opening 32 in the form of an elongated hole for a measuring sensor 42 . Figure 5 The measurement sensor 42 is installed according to Figure 4 34 is a plan view of the adapter plate 34.

[0117] Figure 6 A plan view of a filter unit 20 in a plug-in arrangement of a treatment system is shown, the filter unit 20 being equipped with a pressure measuring device 40 .

[0118] The pressure measuring device 40 comprises: at least one pressure measuring instrument 50, in particular a pressure difference measuring device 50; a measuring sensor 42; and a connecting line 52, in particular a flexible connecting line 52, located between the measuring sensor 42 and the pressure measuring instrument 50, which can be designed as a flexible pressure hose. The filter unit 20 is designed as a so-called trolley in a replaceable manner, wherein the pressure measuring instrument 50 is arranged on a part connected to the processing system 200, in particular, on the insertion device 170 of the filter unit 20.

[0119] In order to visualize the measurement signals, a pressure difference measuring device 50 is arranged fixedly on the processing system 200 near each filter unit 20, for example, in a vertical frame area 174 of a slide-in device 170 or in a horizontal frame area 172 above a swing door (Schwingtür) of the housing 26. From this pressure difference measuring device 50, a flexible pressure hose 52 is attached as a connecting line 52 via a magnetic measuring pipe connection 48 to the corresponding housing 26 of the filter unit 20. In the vertical frame area 174, there can also be a receptacle 54 for the magnetic measuring pipe connection 48, which can be hung in a certain parking position during the replacement of the filter unit 20, thereby ensuring that the pressure hose 52 extends vertically downward along the vertical frame area 174 in a slender manner and does not form a loop. Therefore, when the measuring sensor 42 is received in the receptacle 54, at least a part of the connecting line 52 with the measuring sensor 42 is arranged in the vertical direction L.

[0120] exist Figure 7 according to Figure 6 This can be seen in the plan view of the filter unit 20 of FIG. 1 , in which the measuring sensor 42 can be seen in the receptacle 54 on the insertion device 170 .

[0121] Figure 8 A flow chart of a method for operating a processing system 200 with a monitoring device 100, which processes a workpiece, in particular a car body, with a coating medium, in particular spray-coating the workpiece. The method comprises: in a first step S100, at least one criterion for replacing the filter unit 20 is determined. The criterion may include at least one of the following variables: a first limit value of a first pressure measuring device 40 of the filter unit 20, a second limit value of a second pressure measuring device 60 of the processing system 200, and a limit value of the number and / or duration of coating cycles of the filter unit 20 that have been carried out.

[0122] During the coating, the measured values ​​of the first pressure measuring device 40 of the n filter units 20 are continuously determined in steps S_1 to S_n. The number n of filter units can be selected by a person skilled in the art as required. At the same time, in step S130, the measured value of the second pressure measuring device 60 of the treatment system 200 is determined. In addition, the number and / or duration of the coating cycles performed by the filter unit 20 are determined at the same time.

[0123] In step S102, it is continuously checked whether the measured value of the second pressure measuring device 60 exceeds the second limit value. If it exceeds the second limit value, it is checked in step S104 which filter unit 20 has the highest measured value. Thereafter, it jumps to step S110 and outputs a signal to replace the filter unit 20.

[0124] If the second limit value of the second pressure measuring device 60 is not exceeded in step S102, a check is made in step S106 whether the measured value of the first pressure measuring device 40 of the filter unit 20 exceeds the first limit value. If the first limit value is exceeded, a signal is issued in step S110 to replace the filter unit 20.

[0125] If no measured value of the first pressure measuring device 40 is found to exceed the first limit value in the check in step S106, then in step S108, it is checked whether the number and / or duration of the coating cycles performed by the filter unit 20 exceeds the limit value. If the limit value is exceeded, a signal is issued in step S110 to replace the filter unit 20. If no measured value exceeds the limit value, the measured values ​​of the first pressure measuring device 40 and the second pressure measuring device 60 and the counting device 70 are continuously determined.

[0126] If the filter unit 20 is removed from the treatment system 200 and a lower pressure is determined in the first pressure measuring device 40 of the filter unit 20 after the filter unit 20 is reconnected, the counter 70 can be reset if necessary. Alternatively, the counting device 70 can be reset by manually resetting the counting device 70. Furthermore, the counting device 70 can also be reset by the counting device 70 automatically detecting the digital signal of the filter unit 20 when the filter unit 20 is docked to the treatment system 200.

[0127] The criteria for replacing the filter unit 20, in particular the first pressure measuring device 40 and the second pressure measuring device and the limit values ​​for the number and / or duration of the coating cycles carried out, can advantageously be defined according to predeterminable input variables of the operation of the treatment system 200, in particular according to costs and / or CO2 emissions. The predeterminable input variables can, for example, include at least one of the following variables: the price of electricity, the price of the filter 30, the personnel costs per filter replacement, the disposal costs per filter 30, the CO2 emissions per kWh of electricity or per filter 30, the CO2 emissions in particular including the production and disposal of the filter 30.

[0128] Furthermore, the criteria for replacing the filter unit 20 can be adjusted based on current and / or past operating data of the processing system 200. In particular, the criteria can be adjusted based on automatically recorded operating data and / or manually inputtable operating data. The method according to the invention can be performed by means of a correspondingly configured data processing device, for example by means of the device according to the invention for data processing, in particular, the method according to the invention can be performed in an automatic or semi-automatic manner.

[0129] For example, a conventional computer, a conventional workstation, a mainframe computer or a similar device can be used as such a data processing device. Therefore, in particular, the data processing device may include a processor, a microchip, an integrated circuit, a hardware circuit, etc., to execute a computer program or program code that codes the method or represents the method. In addition, in particular, the data processing device may have a volatile and / or non-volatile data memory connected to the data processing device, one or more interfaces for receiving and outputting data, and / or other similar components. The data processing device may have one or more sub-devices for executing each method step according to the method of the present invention. These sub-devices may be or may include corresponding hardware circuits or hardware modules, but may also be or may include corresponding program blocks or program modules of the above-mentioned computer program, i.e., for example, operating programs for data processing devices.

[0130] Fig. 9 A flow chart of a method proposed according to another embodiment of the present invention is shown.

[0131] Step S200 corresponds to Figure 8 Step S100 in the flowchart of the embodiment shown. During coating, the measured values ​​of the first pressure measuring device 40 of n filter units 20 are continuously determined in steps S_1 to S_n. The number n of filter units can be selected by a person skilled in the art as required. At the same time, in step S130, the measured value of the second pressure measuring device 60 of the treatment system 200 is determined. In addition, the number and / or duration of coating cycles that have been performed on the filter unit 20 is determined at the same time.

[0132] However, unlike Figure 8 The serial order shown in Fig. 9 In the embodiment described, the following steps S202, S204, S206, S208 are performed independently of each other, in particular in parallel in time. In step S202, it is continuously checked whether the measured value of the second pressure measuring device 60 exceeds the second limit value. If the second limit value is exceeded, it is checked in step S204 which filter unit 20 has the highest measured value. Thereafter, the process jumps to step S210 and outputs a signal to replace the filter unit 20.

[0133] In step S206, it is checked whether the measured value of the first pressure measuring device 40 of the filter unit 20 exceeds the first limit value. If it exceeds the first limit value, a signal to replace the filter unit 20 is issued in step S210.

[0134] In step S208, it is checked whether the number and / or duration of coating cycles performed on the filter unit 20 exceeds a limit value. If the limit value is exceeded, a signal to replace the filter unit 20 is issued in step S210.

[0135] If no limit value is exceeded, the measured values ​​of the first pressure measuring device 40 and the second pressure measuring device 60 and of the counting device 70 continue to be determined continuously.

[0136] Fig.10 For this purpose, a schematic diagram of a data processing device 300, for example a computer 310, is shown for carrying out a method for operating a processing system 200 with a monitoring device 100, which processes a workpiece, in particular spray-coats a workpiece, in particular a vehicle body, with a coating medium.

[0137] The data processing device 300 has a data memory 314, a processor 312 connected to the data memory 314, and an interface 316 connected to the processor 312 for receiving and outputting data. In addition, the data processing device 300 has an interface to a peripheral device 318, such as a network or an external storage system. A computer program 320 for implementing the method is stored in the data memory 314. The corresponding program modules 322 are represented here as method steps.

[0138] Reference numerals list

[0139] 10. Processing Chamber

[0140] 12 Entrance

[0141] 20 Filter units

[0142] 22 Entrance

[0143] 24 Exit

[0144] 26 Housing

[0145] 28 Exhaust air duct

[0146] 30 Filters

[0147] 32 Opening

[0148] 34 Adapter Plate

[0149] 40 Pressure measuring device

[0150] 42 Measuring sensors

[0151] 44 Measuring tube

[0152] 46 Connector

[0153] 48 Measuring pipe joint

[0154] 50 Pressure measuring instrument

[0155] 52 Connecting pipeline

[0156] 54 Accommodation

[0157] 60 Pressure measuring device

[0158] 70 Counting device

[0159] 80 Exhaust air collection channel

[0160] 82 Exit

[0161] 90 Flow direction

[0162] 100 Monitoring Devices

[0163] 170 Insertion device

[0164] 172 Horizontal frame area

[0165] 174 Vertical frame area

[0166] 200 Processing System

[0167] 300 Data processing device

[0168] 310 Computer

[0169] 312 processors

[0170] 314 Data storage

[0171] 316 Interface for receiving and outputting data

[0172] 318 Peripherals

[0173] 320 Computer Programs

[0174] 322 Program Modules

[0175] L vertical direction

[0176] S100, S200 Determination Standard

[0177] S102, S202 Check the measured value of the second pressure measuring device

[0178] S104, S204 Determine the highest measurement value of the first pressure measuring device

[0179] S106, S206 Check the measured value of the first pressure measuring device

[0180] S108, S208 Check the number / duration of coating cycles

[0181] S110, S210 output signal to replace filter unit

[0182] S_1-S_n Determine the measured value of the first pressure measuring device

[0183] S130 Determine the measured value of the second pressure measuring device

[0184] S140 Determine the number / duration of coating cycles.

Claims

1. A monitoring device (100) for monitoring a processing system (200), wherein the processing system (200) coats a workpiece with a coating medium, in particular, the processing system (200) sprays the workpiece with the coating medium, in particular, the workpiece is a vehicle body, The monitoring device (100) comprises: at least one first pressure measuring device (40) for installation in a filter unit (20), the first pressure measuring device being arranged downstream of a plurality of filters (30) of the filter unit (20) in a normal flow direction (90); and at least one second pressure measuring device (60) for being arranged in the exhaust air collecting channel (80), Therein, the pressure difference compared to the atmospheric pressure of the surroundings of the filter unit (20) is determined by a pressure measuring device (40, 60).

2. The monitoring device according to claim 1, further comprising a counting device (70) for each filter unit (20) to detect the number and / or duration of coating cycles that have been carried out.

3. The monitoring device according to claim 1 or 2, wherein: The first pressure measuring device (40) and the second pressure measuring device (60) comprise: at least one pressure measuring instrument (50), in particular, the pressure measuring instrument (50) is a pressure difference measuring instrument; a measuring sensor (42); and a connecting pipeline (52) located between the measuring sensor (42) and the pressure measuring instrument (50), in particular, the connecting pipeline (52) is a flexible connecting pipeline (52).

4. The monitoring device according to claim 3, wherein: The measuring sensor (42) has a measuring tube (44), wherein a free opening (45) of the measuring tube points in the flow direction (90), in particular the measuring tube is a crank-shaped measuring tube (44).

5. The monitoring device according to claim 3 or 4, wherein: The measuring sensor (42) has a measuring connection (48) for detachable connection to a housing (26) of the filter unit (20), wherein the measuring connection (48) is magnetic.

6. The monitoring device according to claim 4 or 5, wherein: The measuring tube (44) has a connecting joint (46) for connecting the measuring tube (44) to the connecting line (52).

7. A processing system (200) for coating a workpiece, the processing system having a monitoring device (100) according to any one of the preceding claims, in particular, the processing system (200) is used for spraying a workpiece, in particular, the workpiece is a car body, the processing system (200) comprising at least: a treatment chamber (10) having an inlet (12) for supplying air into the treatment chamber (10); A plurality of filter units (20) having at least one filter (30) through which air is passed in parallel, the filter units filtering the air exhausted from the treatment chamber (10), wherein the air filtered by the filter units (20) is introduced into a common exhaust air collecting channel (80), The monitoring device (100) has at least one first pressure measuring device (40) for each filter unit (20), wherein the first pressure measuring device is arranged downstream of at least one filter (30) of the filter unit (20), The monitoring device (100) has at least one second pressure measuring device (60), which is arranged in the exhaust air collecting channel (80). The pressure measuring device (40, 60) determines the pressure difference compared to the atmospheric pressure of the surrounding environment.

8. Treatment system according to claim 7, further comprising a counting device (70) for each filter unit (20) for recording the number and / or duration of coating cycles that have been carried out.

9. The processing system according to claim 7 or 8, wherein: The first pressure measuring device (40) and the second pressure measuring device (60) comprise: at least one pressure measuring instrument (50), in particular, the pressure measuring instrument (50) is a pressure difference measuring instrument; a measuring sensor (42); and a connecting pipeline (52) located between the measuring sensor (42) and the pressure measuring instrument (50), in particular, the connecting pipeline (52) is a flexible connecting pipeline (52).

10. The processing system according to claim 9, wherein: The measuring sensor (42) has a measuring tube (44), wherein a free opening (45) of the measuring tube (44) points in the flow direction (90), in particular the measuring tube is a crank-shaped measuring tube (44).

11. The processing system according to claim 9 or 10, wherein: The measuring sensor (42) is arranged in an exhaust air duct (28) of the filter unit (20) downstream of at least one filter (30) of the filter unit (20).

12. A processing system according to any one of claims 9 to 11, wherein: The filter unit (20) has at least two filters (30) arranged one above the other in a vertical direction (L), air flows through the at least two filters (30) in parallel, wherein the filtered air is guided downwards in the exhaust air duct (28) along the vertical direction (L) to an outlet (24), the outlet (24) being arranged below the at least two filters (30) in the vertical direction (L), The measuring sensor (42) is arranged in the region of the exhaust air duct (28) at the level of an upper filter of the at least two filters (30).

13. A processing system according to any one of claims 9 to 12, wherein: The filter unit (20) has at least two filters (30) arranged adjacent to one another in the horizontal direction, wherein the measuring sensor (42) is arranged between the at least two filters (30) in the region of the exhaust air duct (28).

14. A processing system according to any one of claims 9 to 13, wherein: The housing (26) of the filter unit (20) has an opening (32) for allowing the measuring sensor (42) to pass through into the housing (26), and in particular, the housing (26) of the filter unit (20) has an opening (32) for allowing the measuring tube (44) to pass through into the housing (26).

15. The processing system of claim 14, wherein: The housing (26) has an adapter plate (34) with an opening (32), in particular, wherein the opening (32) is designed as an asymmetrical elongated hole, and / or wherein: The adapter plate (34) has positioning pins for positioning the measuring sensor (42).

16. A processing system according to claim 14 or 15, wherein: The measuring sensor (42) has a measuring tube connection (48) for being detachably connected to the housing (26), in particular, the measuring tube connection (48) for being detachably connected to the adapter plate (34), in particular, wherein the measuring tube connection (48) is designed to be magnetic.

17. A processing system according to any one of claims 10 to 16, wherein: The measuring tube (44) has a connection joint (46) for connecting the measuring tube (44) to the connecting line (52), wherein when the measuring tube (44) is normally installed, the connection joint (46) is arranged outside the housing (26).

18. A processing system according to any one of claims 9 to 17, wherein: The filter unit (20) is designed to be replaceable, wherein the pressure measuring instrument (50) is arranged on a part connected to the processing system (200), in particular, the pressure measuring instrument (50) is arranged on an insertion device (170) for the filter unit (20).

19. The processing system of claim 18, wherein: The insertion device (170) has a receptacle (54) for the measuring sensor (42), wherein the insertion device (170) has a receptacle (54) for a magnetic measuring connection piece (48).

20. The processing system of claim 19, wherein: When the measuring sensor (42) is accommodated in the accommodation portion (54), at least a portion of the connecting line (52) with the measuring sensor (42) is arranged in a vertical direction (L).

21. A computer program product, comprising commands, which, when executed by a computer (310), at least cause the computer to perform the following operations when operating a processing system (200) for coating a workpiece with a coating medium, in particular, when executed by the computer (310), at least cause the computer to automatically perform the following operations when operating a processing system (200) for coating a workpiece with a coating medium, in particular, the processing system (200) sprays a workpiece with a coating medium, in particular, the workpiece is a vehicle body: - determining at least one criterion for replacing the filter unit (20), wherein the criterion comprises at least one of the following variables: a first limit value of a first pressure measuring device (40) of the filter unit (20), a second limit value of a second pressure measuring device (60) of the treatment system (200), a limit value of the number and / or duration of coating cycles performed on the filter unit (20); - when at least one criterion is met, in particular, When the measured value of the first pressure measuring device (40) of the filter unit (20) exceeds the first limit value, and / or When the measured value of the second pressure measuring device (60) exceeds the second limit value, and / or When the number and / or duration of coating cycles performed on the filter unit (20) exceeds a limit value, Information for scheduling replacement of one or more filter units (20) is output.

22. A device (300) for data processing, the device comprising means (310, 312, 314, 316, 320, 322), the device being used to perform the following operations, in particular, the device being used to automatically perform the following operations: - determining at least one criterion for replacing the filter unit (20), wherein the criterion comprises at least one of the following variables: a first limit value of a first pressure measuring device (40) of the filter unit (20), a second limit value of a second pressure measuring device (60) of the treatment system (200), a limit value of the number and / or duration of coating cycles performed on the filter unit (20); - when at least one criterion is met, in particular, When the measured value of the first pressure measuring device (40) of the filter unit (20) exceeds the first limit value, and / or When the measured value of the second pressure measuring device (60) exceeds the second limit value, and / or When the number and / or duration of coating cycles performed on the filter unit (20) exceeds a limit value, Information for scheduling replacement of one or more filter units (20) is output.

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