JP2021156221A - System for measuring drain quantity generated in pneumatic circuit - Google Patents

Abstract

To provide a system that can measure a temperature and humidity of outside air immediately before being taken by an air compressor as well as a temperature and an air pressure in the compressed air in a pneumatic circuit, and can measure a drain quantity generated on the basis of measurement results.SOLUTION: A system includes a temperature/humidity measuring instrument for measuring a temperature and humidity of outside air sucked by an air compressor, in an inlet of the air compressor or its vicinity, alternatively, in an interior of a room where the air compressor is present, in a pneumatic circuit from generation of the compressed-air by the air compressor to final discharge out of an outlet through the pipeline and various instruments. Also, the system includes a thermometer for measuring a temperature of the compressed-air flowing through the pipeline and a pressure gauge for measuring the air pressure in a predetermined place of the pipeline disposed between various instruments. Further, the system employs means for measuring a drain quantity which may be generated in the various instruments, from the temperature and the humidity of the outside air measured in the temperature/humidity measuring instrument, and the temperature and the air pressure of the compressed-air measured in the thermometer and the pressure gage.SELECTED DRAWING: Figure 1

Description

The present invention relates to a system for measuring the amount of drainage that can occur in a compressed pneumatic circuit.

The compressed air generated by the air compressor is used for food processing, finishing of precision equipment such as lenses, cleaning, and other various purposes. Depending on the use of the compressed air, various devices are arranged in the middle of the pneumatic circuit until the compressed air is discharged from the air compressor. For example, when it is used in an application where it is strictly prohibited to take out water, a configuration is adopted through an air dryer in the middle of the pneumatic circuit, and further, water, oil, sludge and microorganisms that could not be completely removed in the subsequent stage of the air dryer are adopted. In order to remove the above, an air filter made of resin or paper and having a net-like or hollow fiber membrane-like shape or an air filter wrapped with activated carbon is arranged.

By the way, in the configuration of the compressed air pressure circuit as described above, the heated compressed air discharged by the air compressor is cooled in the piping line, and the saturated water vapor amount under pressure decreases, so that drainage occurs. obtain. The saturated water vapor amount fluctuates in proportion to the temperature and also in the pressure, and the saturated water vapor amount is a known fact as shown in the table according to the JIS standard of FIG. The boundary temperature at which the amount of saturated water vapor becomes the limit and dew condensation occurs is generally called the dew point temperature. Therefore, if the temperature and humidity are known, it is possible to determine whether or not dew condensation (drain) can occur by comparing the saturated water vapor amount and the humidity at the temperature.

As described above, the amount of saturated water vapor also fluctuates depending on the pressure. That is, as the pressure increases, the amount of saturated water vapor increases accordingly. The saturated water vapor amount shown in FIG. 3 shows a numerical value under atmospheric pressure, and in the compressed air in the compressed pneumatic circuit as in the present invention, the saturated water vapor amount at the same temperature is higher than that under atmospheric pressure. Will be done. The table shown in FIG. 4 is a comparison / conversion table of dew point temperatures under atmospheric pressure and pressurization. By using this, it is possible to convert the temperature of compressed air to the dew point temperature in the case of atmospheric pressure, and to determine the saturated water vapor amount using the table shown in FIG.

As a configuration of a conventional compressed air pressure circuit, a technical proposal of "a drain discharge method and a drain discharge mechanism of an air compressor" according to Japanese Patent Application Laid-Open No. 2010-84736 (Patent Document 1) is known. Specifically, the purpose is to efficiently discharge the drain in response to the change in the amount of drain generated due to the change in the operating environment of the air compressor, and the intake air sucked into the compressed air pressure circuit. By actually measuring the temperature and humidity of the above, the amount of drainage generated per unit time is calculated, and a mode is adopted in which the amount of drainage generated and the amount of drainage discharged are matched.

However, compressed air is constantly subject to temperature changes as it passes through various devices and piping lines, and the humidity also changes depending on the measurement location due to the generation and discharge of drainage in various devices and piping lines. Is what you do. The technical proposal according to Patent Document 1 does not measure the temperature and humidity of the compressed air itself, but only measures the temperature and humidity of the outside air sucked into the compressed air pressure circuit. It is not possible to respond to the temperature and humidity that change depending on the measurement location of the compressed air flowing through the compressed air pressure circuit, and as a result, it is difficult to measure the accurate dew point, and the amount of drainage generated is assumed and estimated. It was only obtained, and it could not be said that the estimated amount of drainage and the actual amount of drainage could always match.

The applicant pays attention to the problem that it is difficult to predict the amount of drainage generated in the compressed air pressure circuit, and wonders if it is possible to accurately predict the amount of drainage that can occur in various devices constituting the compressed air pressure circuit. Based on the idea, we have developed a system that can measure the temperature and humidity of the outside air immediately before being sucked into the air compressor, the temperature and air pressure in the compressed air, and the amount of drainage generated based on the measurement results. This leads to the proposal of "a drainage measurement system generated in a compressed air pressure circuit".

Japanese Unexamined Patent Publication No. 2010-84736

In view of the above problems, the present invention measures the temperature and humidity of the outside air immediately before being taken into the air compressor and the temperature and air pressure in the compressed air in the compressed air pressure circuit, and measures the amount of drainage generated based on the measurement results. The challenge is to provide a possible system.

In order to solve the above problems, the present invention presents the present invention in a compressed air pressure circuit from when compressed air is generated by an air compressor to when it is finally discharged from a discharge port via a piping line and various devices. A temperature / humidity measuring device for measuring the temperature and humidity of the outside air sucked by the air compressor is provided at or near the suction port or in a room where the air compressor is located, and a predetermined piping line arranged between various devices is provided. A means is adopted in which a thermometer for measuring the temperature of the compressed air flowing in the pipe path and a pressure gauge for measuring the air pressure are provided at the location.

By adopting such means, the amount of drainage that can be generated in various devices from the temperature and humidity of the outside air measured by the temperature and humidity measuring instrument and the temperature and air pressure of the compressed air measured by the thermometer and the pressure gauge. Can be measured.

Further, the present invention is provided with a calculation unit that receives the measured values measured by the temperature / humidity measuring instrument, the thermometer and the pressure gauge, and automatically predicts the amount of drainage that may occur in various devices based on the received measured values. Means can be adopted.

Further, the present invention may employ a means provided with a control unit for controlling drain discharge by a drain trap provided in various devices based on the drain amount automatically predicted by the calculation unit.

By adopting such means, drain discharge by the drain trap provided in various devices can be efficiently performed at the optimum timing based on the drain amount automatically predicted by the calculation unit.

Furthermore, the present invention is a recording in which the measured values measured by the temperature / humidity measuring instrument, the thermometer and the pressure gauge are associated with the date and time, and the measured values are automatically recorded at predetermined time together with the date and time. The means by which the unit is provided may be adopted.

By adopting such means, the measured values measured by the temperature and humidity measuring instrument, thermometer and pressure gauge are automatically recorded in association with the date and time, which contributes to data management and maintenance / management of the entire system. ..

According to the drain amount measuring system generated in the compressed air pressure circuit according to the present invention, the temperature and humidity of the outside air measured by the temperature and humidity measuring instrument and the temperature and air pressure of the compressed air measured by the thermometer and the pressure gauge. Therefore, it is possible to accurately measure the amount of drainage that can occur in various devices, which is an excellent effect.

It is explanatory drawing which shows the embodiment of the drain amount measuring system generated in the compressed pneumatic circuit which concerns on this invention. It is explanatory drawing which shows the embodiment of the temperature-humidity measuring instrument which concerns on this invention. It is a table which shows the saturated water vapor amount under atmospheric pressure. It is a comparison / conversion table of dew point temperature under atmospheric pressure and pressurization.

The drain amount measuring system generated in the compressed air pressure circuit according to the present invention is based on the temperature and humidity of the outside air measured by the temperature and humidity measuring instrument and the temperature and air pressure of the compressed air measured by the thermometer and the pressure gauge. The biggest feature is to measure the amount of drainage that can occur in various devices.
Hereinafter, embodiments of the drain amount measuring system generated in the compressed pneumatic circuit according to the present invention will be described with reference to the drawings.

The drainage measurement system generated in the compressed pneumatic circuit according to the present invention is not particularly limited to the embodiments described below, and can exhibit the same effects within the scope of the technical idea of the present invention. It can be changed as appropriate within the range of shape, dimensions, material, device, etc.

FIG. 1 is an explanatory diagram showing an embodiment of a drain amount measuring system generated in the compressed pneumatic circuit according to the present invention according to the present invention. Further, FIG. 2 is an explanatory diagram showing an embodiment of a temperature / humidity measuring instrument provided in a compressed air pressure circuit.
The drain amount measuring system generated in the compressed air pressure circuit according to the present invention is in the compressed air pressure circuit from the generation of compressed air by the air compressor to the final discharge from the discharge port via the piping line and various devices. , A system for measuring the temperature and humidity of the outside air immediately before being taken into the air compressor, and the temperature and air pressure in the compressed air.

First, the compressed pneumatic circuit according to the present invention will be described.
The compressed air pressure circuit according to the present invention is mainly composed of an air compressor 1 and a piping line 2. At the end of the piping line 2, a discharge port 3 for finally discharging compressed air is provided. If necessary, one or a plurality of various devices are arranged at predetermined intermediate points from the air compressor 1 to the discharge port 3 in the piping line 2.

The air compressor 1 is a machine that compresses air to generate compressed air above a predetermined atmospheric pressure, and there are various types such as a reciprocating type, a rotary type, and a centrifugal type depending on the structure for generating the compressed air. do. The method of the air compressor 1 used in the present invention is not particularly limited, and any method and structure can be used. The air compressor 1 is provided with a suction port for sucking outside air, and is connected to a piping line 2 for sending the generated compressed air.

The piping line 2 is composed of a hollow pipe for supplying compressed air, and is arranged to supply compressed air from the air compressor 1 to the discharge port 3. Since one or a plurality of various devices are arranged at a predetermined intermediate portion of the piping path 2, specifically, they are arranged so as to send compressed air from the air compressor 1 to the various devices. , It is arranged to send compressed air from various devices to the subsequent stage.

The various devices arranged in the pipe line 2 are variously determined depending on the use of the compressed air, and are not particularly limited, but as devices regularly arranged, for example, the compressed air is cooled. Aftercooler 4, air tank 5 for storing compressed air, air dryer 6 for drying compressed air, air filter 7 for removing foreign substances (oil, sludge, etc.) in compressed air, drain in compressed air There is a centrifuge 8 or the like for removing. For the sake of explanation, the term "various devices" may be used to include the air compressor 1 and the discharge port 3.

The aftercooler 4 is a device for heat exchange for cooling the high-temperature compressed air generated by the air compressor 1, and there are an air-cooled type and a water-cooled type depending on the cooling method. The aftercooler 4 used in the present invention does not matter whether it is an air-cooled type or a water-cooled type, and is not particularly limited.

The air tank 5 is a storage for temporarily storing compressed air, and is for leveling the pulsation of compressed air and suppressing a sudden pressure drop when a large amount of compressed air is temporarily consumed. It is prepared.

The air dryer 6 is a device for drying compressed air to remove moisture, and there are a freezing type, a hollow fiber membrane type, an adsorption type, and the like depending on the moisture removing method. The air dryer 6 used in the present invention does not depend on any of a freezing type, a hollow fiber membrane type, and an adsorption type, and is not particularly limited, but a freezing type air dryer is generally used. It is 6. The freezing type air dryer 6 is a device for cooling compressed air and condensing and removing contained moisture by utilizing the latent heat of vaporization of the refrigerant, and can be introduced at a relatively low cost.

The air filter 7 is a filter for removing water, oil, sludge and microorganisms in compressed air, and is made of resin or paper and has a net-like or hollow fiber membrane-like air filter, or an air filter wrapped with activated carbon. Is used. The air filter 7 is generally arranged after the air dryer 6.

The centrifuge 8 is a separator for removing water and oil in the compressed air, and the compressed air entering the housing is oil and solid in the air due to the centrifugal force generated by passing through the deflector. It has a structure in which an object is struck against the inner wall of the housing to drop it, and only air is taken out through a cartridge provided in the center. The centrifuge 8 is arranged at a predetermined intermediate position in the piping line 2 connecting the air compressor 1 and the air dryer 6, or is arranged at a predetermined intermediate position in the piping line 2 connecting the air dryer 6 and the air filter 7. Will be set up.

A drain trap 10 for discharging the generated drain is connected to the air compressor 1 and various devices. The drain trap 10 includes an electromagnetic type and a float type depending on the discharge method thereof. The drain trap 10 used in the present invention does not ask whether it is an electromagnetic type or a float type, and is not particularly limited, but a spring snap action type or a magnet snap action type float type drain trap is adopted. As a result, when a predetermined amount of drain is stored, the drain can be mechanically and automatically discharged to the outside, and the certainty of drain discharge is ensured. Further, by adopting the electromagnetic drain trap, it is possible to efficiently discharge the drain at the optimum timing by adopting the mode of drain discharge control by the control unit described later.

Next, the structure for measuring the temperature and humidity of the outside air according to the present invention will be described.
A temperature / humidity measuring instrument 20 is provided in or near the suction port 1a of the air compressor 1, or in the room 1b where the air compressor 1 is located. The temperature / humidity measuring instrument 20 is for measuring the temperature and humidity of the outside air sucked by the air compressor 1, and specifically, a thermometer capable of measuring the temperature and a humidity capable of measuring the humidity. It consists of a total. Such a thermometer and a hygrometer may be provided separately, or may be configured by an integrated thermometer and hygrometer. Further, in addition to an analog type that visually confirms a memory indicating temperature and humidity, a digital type that digitally displays a value measured by a sensor as shown in the figure on a display panel may be used.

Since the temperature / humidity measuring instrument 20 measures the temperature and humidity of the outside air sucked into the air compressor 1, the suction port where the outside air is taken into the air compressor 1 in order to obtain a more accurate measurement value. It is preferable that the air compressor is arranged at a position close to 1a, and therefore, it is preferable that the air compressor 1 is equipped with the suction port 1a itself or is arranged in the vicinity of the suction port 1a. However, if the place where the air compressor 1 exists is a room 1b in a limited space, the temperature and humidity of the entire room 1b are not so different, so that the space is not necessarily limited to the suction port 1a or its vicinity. It may be provided at any place in the room 1b.

Next, the structure for measuring the temperature and air pressure of the compressed air according to the present invention will be described.
A thermometer 22 and a pressure gauge 24 are provided in the piping line 2 arranged between the various devices. The thermometer 22 is for measuring the temperature of the compressed air flowing in the piping line 2, and is an analog type for visually checking a memory indicating the temperature and a display panel for displaying a value measured by a sensor as shown in the figure. It may be a digital type that digitally displays on the surface. As for the thermometer 22, if the temperature can be measured, it can be adopted even if it has other measurement functions, and for example, the temperature / humidity measuring instrument 20 can be used instead. Further, the pressure gauge 24 is for measuring the air pressure of the compressed air flowing in the piping line 2, and is an analog type for visually checking a memory showing the air pressure as shown in the figure, as well as a value measured by a sensor. It may be a digital type that digitally displays on a display panel.

Since the thermometer 22 and the pressure gauge 24 measure the temperature of the compressed air flowing in the piping line 2, they may be provided at a predetermined position in the piping line 2 and are limited to specific arrangement points. It's not something to do. However, since the measured value is closely related to the measurement of the amount of drainage that can occur in various devices, it is arranged for each piping line 2 connecting various devices including the air compressor 1. It is preferable that the compressed air is arranged immediately before or near the place where the compressed air flows in various devices.

In this way, from the temperature and humidity of the outside air measured by the temperature and humidity measuring instrument 20, the temperature and air pressure of the compressed air flowing in the piping line 2 measured by the thermometer 22 and the pressure gauge 24, various devices can be used. It is possible to measure the amount of drainage that can occur.

Here, specific examples of drainage measurement in various devices will be described step by step. As the specifications of the air compressor 1, it is assumed that 1 cubic meter / minute and the compressed air pressure is 0.7 MPa. Further, a case where various devices are arranged as shown in FIG. 1 will be described as an example.
First, the temperature and humidity of the outside air sucked into the air compressor 1 are measured by the temperature / humidity measuring instrument 20. From the measured temperature, as shown in FIG. 3, the amount of saturated water vapor under atmospheric pressure is known. For example, when the temperature of the outside air is 30 ° C., the saturated water vapor amount is 30.4 g / cubic meter. Also, the measured humidity reveals the amount of water vapor in the inhaled outside air. For example, when the humidity of the outside air is 80%, 30.4 × 0.8 = 24.32 g / cubic meter (1).

Next, the temperature and air pressure of the compressed air flowing into various devices are measured in the piping line 2 by the thermometer 22 and the pressure gauge 24. Assuming that the temperature of the compressed air in the piping line 2 connecting the air compressor 1 and the aftercooler 4 is 45 ° C. and the air pressure is 0.7 MPa, as shown in FIG. 4, when the dew point temperature under pressure is 45 ° C., it is large. Since it becomes 8 ° C. when converted to the atmospheric pressure dew point temperature, the saturated water vapor amount in the case of 8 ° C. is calculated from FIG. 3, and the saturated water vapor amount of the compressed air in the aftercooler 4 is 8.28 g / cubic meter (2).

When the saturated water vapor amount of the compressed air in the aftercooler 4 is subtracted from the sucked water vapor amount, (1)-(2) = 16.04 g / cubic meter, and this amount is generated as a drain without being completely saturated in the compressed air. That is, it is measured as the amount of drainage that can occur in the aftercooler 4.

Next, the temperature and air pressure of the compressed air in the piping line 2 connecting the aftercooler 4 and the air tank 5 are measured. Assuming that the temperature is 35 ° C. and the air pressure is 0.7 MPa, as shown in FIG. 4, when the dew point temperature under pressure is 35 ° C., it becomes 0 ° C. when converted to the atmospheric pressure dew point temperature. The saturated water vapor amount in the case is calculated, and the saturated water vapor amount of the compressed air in the air tank 5 is 4.85 g / cubic meter (3).

When the saturated water vapor amount of the compressed air in the air tank 5 is subtracted from the saturated water vapor amount of the compressed air in the aftercooler 4 in the previous stage, (2)-(3) = 3.43 g / cubic meter, and this amount is saturated in the compressed air. It will be generated as drain without being exhausted, that is, it will be measured as the amount of drain that can be generated in the air tank 5.

After that, by measuring the temperature and air pressure of the compressed air flowing in the piping line 2 connected to the various devices, it is possible to measure the amount of drainage that can occur in the various connected devices.
Further, the drainage amount that can be generated in the entire system according to the present invention can be obtained by adding all the drainage amounts of the various devices measured as described above.

By the way, the amount of drainage that can occur in various devices as described above can be artificially measured from the tables shown in FIGS. 3 and 4 once the measured values of the temperature / humidity measuring instrument 20, the thermometer 22 and the pressure gauge 24 are known. It is possible to measure in a targeted manner. However, the method of artificially measuring based on each measured value is complicated and involves time loss. Therefore, it is preferable to mechanically and automatically predict the amount of drainage.

In order to enable automatic prediction of the amount of drainage, a mode in which a calculation unit is provided can be considered as a configuration of the system according to the present invention. The table data shown in FIGS. 3 and 4 is input to the calculation unit, and the above-mentioned calculation method for measuring the amount of drainage is programmed. The calculation unit is connected to the temperature / humidity measuring instrument 20, the thermometer 22 and the pressure gauge 24 online by wireless or wired, and receives the measured values measured in real time at all times or regularly. Then, based on the received measured values, the amount of drainage that can occur in various devices is automatically predicted by the input table data and the programmed calculation method. The calculation unit is provided with a display medium for displaying the amount of drain measured by automatic prediction, and displays the measurement result of the amount of drain that can occur for each of the various devices.

It is conceivable that the amount of drain automatically predicted by the calculation unit is used for controlling drain discharge. That is, as the configuration of the system according to the present invention, an aspect including a control unit can be adopted. The control unit is connected to the calculation unit online by wireless or wired, and receives the predicted result of the automatically predicted drainage amount in real time at all times or periodically. In addition, the control unit is also connected to the drain traps 10 provided in various devices online by wireless or wired, and sends a drain discharge command to each drain trap 10 based on the prediction result of the drain amount received from the calculation unit. do. Upon receiving the drain discharge command, the drain trap 10 operates to drain the drain. By adopting such an embodiment, it is possible to eliminate unnecessary operation or malfunction of the drain trap 10 and efficiently perform drain discharge at an optimum timing.

It is conceivable that a recording unit is provided for automatically recording the measured values measured by the temperature / humidity measuring instrument 20, the thermometer 22, and the pressure gauge 24. The recording unit is a recording medium such as a hard disk, associates each measured value with a date and time, and automatically records the measured value together with the date and time at predetermined time intervals. Further, the prediction result of the drain amount by the calculation unit, the drain discharge command by the control unit, and the like can be recorded together with the date and time. By adopting such a configuration mode, it contributes to data management and maintenance / management of the entire system, and contributes to the reduction of the administrator's record and management burden.

In addition, based on the prediction result of the drain amount in the calculation unit, the command to the drain trap 10 in the control unit, and the recorded contents in the recording unit, the compressed air and the status change of various devices are monitored, and abnormalities such as measurement abnormality and malfunction are performed. It is also possible to consider a mode in which a monitoring unit is provided to issue an alarm or notification as needed when the above is found. The means of such an alarm or notification may be any means such as a sound, a change of the identification light, and an e-mail transmission.

As described above, according to the drain amount measuring system generated in the compressed air pressure circuit according to the present invention, the temperature and humidity of the outside air sucked by the air compressor 1 and the temperature and air pressure of the compressed air sent to various devices are measured. By adopting the structure, it is possible to measure the amount of drain that can occur in various devices, and depending on the measurement result, the specifications of the drain trap 10 for drain discharge can be changed, and automatic drain discharge control can be performed. It exerts excellent effects such as enabling.

The present invention can be used in all fields where compressed air is used, as well as in food processing, finishing processing of precision equipment such as lenses, cleaning, and the like. Therefore, it is considered that the industrial applicability of the "drain amount measuring system generated in the compressed pneumatic circuit" according to the present invention is great.

1 Air compressor 1a Intake port 1b Indoor 2 Pipeline 3 Discharge port 4 Aftercooler 5 Air tank 6 Air dryer 7 Air filter 8 Centrifuge 10 Drain trap 20 Temperature and humidity measuring instrument 22 Thermometer 24 Pressure gauge

In order to solve the above problems, the present invention presents the present invention in a compressed air pressure circuit from when compressed air is generated by an air compressor to when it is finally discharged from a discharge port via a piping line and various devices. A temperature / humidity measuring device for measuring the temperature and humidity of the outside air sucked by the air compressor is provided at or near the suction port or in a room where the air compressor is located, and is arranged between various devices including the air compressor. A means is adopted in which a thermometer for measuring the temperature of the compressed air flowing in the pipe path and a pressure gauge for measuring the air pressure are provided at a predetermined position in the pipe path, respectively.

Since the thermometer 22 and the pressure gauge 24 measure the temperature of the compressed air flowing in the piping line 2, they may be provided at a predetermined position in the piping line 2 and are limited to specific arrangement points. It's not something to do. However, since the measured value is closely related to the measurement of the amount of drainage that can occur in various devices, it is arranged for each piping line 2 connecting various devices including the air compressor 1. is a mode adopted is, also, aspects which is disposed before and near portions of a portion flowing of the compressed air in the various devices are preferred.

Claims (4)

In a compressed air pressure circuit from when compressed air is generated by an air compressor to when it is finally discharged from a discharge port via a piping line and various devices.
A temperature / humidity measuring device for measuring the temperature and humidity of the outside air sucked by the air compressor is provided at or near the suction port of the air compressor or in a room where the air compressor exists, and is arranged between various devices. A thermometer for measuring the temperature of compressed air flowing in the pipe passage and a pressure gauge for measuring the air pressure are provided at a predetermined position in the pipe passage.
It is characterized by measuring the amount of drain that can be generated in various devices from the temperature and humidity of the outside air measured by the temperature and humidity measuring instrument and the temperature and air pressure of the compressed air measured by the thermometer and the pressure gauge. Drain amount measurement system generated in the compressed air pressure circuit. It is characterized by being equipped with a calculation unit that receives the measured values measured by the temperature and humidity measuring instruments, thermometers and pressure gauges and automatically predicts the amount of drainage that can occur in various devices based on the received measured values. The drain amount measuring system generated in the compressed pneumatic circuit according to claim 1. The compressed air pressure circuit according to claim 2, wherein a control unit for controlling drain discharge by a drain trap provided in various devices is provided based on a drain amount automatically predicted by the calculation unit. Drain amount measurement system. A recording unit is provided in which the measured values measured by the temperature / humidity measuring instrument, the thermometer, and the pressure gauge are associated with the date and time, and the measured values are automatically recorded at predetermined time intervals together with the date and time. The drain amount measuring system generated in the compressed pneumatic circuit according to any one of claims 1 to 3.

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