JP6892143B2 - Temperature and humidity measurement structure in compressed pneumatic circuit - Google Patents

Description

The present invention relates to a temperature and humidity measuring structure in a compressed air pressure circuit, and more particularly to a structure for measuring the temperature and humidity of compressed air in a compressed air pressure circuit under pressure.

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 amount of saturated water vapor 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. 5 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. 6 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 pneumatic 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. Since the technical proposal according to Patent Document 1 does not measure the temperature and humidity of the compressed air itself, but measures the temperature and humidity of the outside air sucked into the compressed air pressure circuit, it is compressed via various devices. 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 pneumatic circuit, and as a result, it is difficult to measure the accurate dew point, and it is only possible to estimate the amount of drainage generated. Therefore, it cannot be said that the amount of drainage generated and the amount of drainage discharged can always match.

The applicant paid attention to the problem that it is difficult to predict the amount of drainage generated in the compressed air pressure circuit from the state of the outside air (temperature and humidity), and the temperature in the compressed air without stressing the flow of the compressed air. After measuring the temperature and humidity by branching the compressed air flowing through the pipeline, based on the idea that it is not possible to determine whether or not drainage can occur by measuring the humidity. We have developed a measurement structure that joins the piping line again, and have come up with the proposal of "temperature and humidity measurement structure in a compressed pneumatic circuit" in the present invention.

Japanese Unexamined Patent Publication No. 2010-84736

In view of the above problems, the present invention determines whether or not drainage can occur by measuring the temperature and humidity in the compressed air without giving stress to the flow of the compressed air in the compressed air pressure circuit. An object of the present invention is to provide a possible temperature and humidity measurement structure.

In order to solve the above problems, the present invention provides between various devices 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 pipe line and various devices. A branch pipe is connected to the upstream side of the arranged pipe path, a merging pipe is connected to the downstream side, one end of the inflow pipe is connected to the branch pipe, and an outflow pipe is connected to the merging pipe. One end is connected, the other end of the inflow pipe is connected to the inlet of the pressure vessel, and the other end of the outflow pipe is connected to the outlet of the pressure vessel, and the temperature and humidity are measured inside the pressure vessel. A part of the compressed air in the piping line arranged between various devices is flowed into the pressure vessel through the inflow pipe by the branch pipe, and the compressed air in the pressure vessel is provided. Is returned from the merging pipe to the piping line via the outflow pipe, so that the pressure of the compressed air in the piping line and the pressure of the compressed air in the pressure vessel are kept uniform, and the temperature inside the pressure vessel and the temperature inside the pressure vessel are maintained. By measuring the humidity, a means for measuring the temperature and humidity of the compressed air under pressure is adopted.

Further, the present invention employs a means in which a pressure gauge for measuring the pressure of compressed air is provided at a predetermined location of the pressure vessel or a predetermined intermediate portion of the inflow pipe or the outflow pipe.

Further, the present invention employs a means in which at least a part of the pressure vessel is formed of a transparent or translucent material in which the inside of the vessel is visible.

Furthermore, in the present invention, the measuring instrument is a sensor capable of measuring temperature and humidity, and a display unit for digitally displaying the measured values of temperature and humidity measured by the sensor is provided outside the pressure vessel. Take measures.

Furthermore, the present invention employs a means comprising the function of displaying the date and time on the display unit.

Further, the present invention also includes a recording unit, and adopts a means for automatically recording the measured values of temperature and humidity together with the date and time at predetermined time intervals.

Further, the present invention employs a means in which the pressure vessel is provided with a drain trap.

According to the temperature and humidity measurement structure in the compressed air pressure circuit according to the present invention, compression is performed by adopting a measurement structure in which the compressed air flowing through the piping line is branched, the temperature and humidity are measured, and then the compressed air is rejoined into the piping line. It is possible to accurately measure the temperature and humidity in the compressed air without giving stress to the air flow, and it is easy to determine from the measurement results whether or not the compressed air is in a state where drainage can occur. It has an excellent effect such as being able to do it.

It is explanatory drawing which shows the embodiment of the temperature and humidity measurement structure in the compressed pneumatic circuit which concerns on this invention. It is explanatory drawing which shows the embodiment of the pressure vessel which concerns on this invention. It is explanatory drawing which shows the embodiment of the temperature and humidity measurement structure in the compressed pneumatic circuit which concerns on this invention. It is explanatory drawing which shows the embodiment of the pressure vessel 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.

In the temperature and humidity measurement structure in the compressed air pressure circuit according to the present invention, a part of the compressed air in the piping line arranged between various devices is flowed into the pressure vessel through the inflow pipe by the branch pipe, and at the same time. The compressed air in the pressure vessel is returned from the merging pipe to the piping line via the outflow pipe, so that the pressure of the compressed air in the piping line and the pressure of the compressed air in the pressure vessel are kept uniform. The biggest feature is to measure the temperature and humidity of compressed air under pressure by measuring the temperature and humidity inside the pressure vessel.
Hereinafter, embodiments of the temperature and humidity measurement structure in the compressed pneumatic circuit according to the present invention will be described with reference to the drawings.

The temperature and humidity measurement structure in the compressed pneumatic circuit according to the present invention is not particularly limited to the embodiments described below, and is within the scope of the technical idea of the present invention, that is, a shape capable of exhibiting the same action and effect. It can be changed as appropriate within the range of dimensions, materials, etc.

1 and 2 are explanatory views showing an embodiment of a temperature and humidity measurement structure in the compressed pneumatic circuit according to the present invention, FIG. 1 shows an overall outline of the compressed pneumatic circuit, and FIG. 2 (a) shows a pressure vessel. 30 is a front view, FIG. 2 (b) is a cross-sectional view taken along the line AA'of (a).
The temperature and humidity measurement structure in the compressed air pressure circuit according to the present invention is the compressed air pressure circuit from the time when the compressed air is generated by the air compressor until the compressed air is finally discharged from the discharge port through the piping line and various devices. It is a structure for measuring the temperature and humidity of compressed air under pressure.

First, the compressed pneumatic circuit according to the present invention will be described.
The compressed pneumatic 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. To 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. A piping path 2 for supplying the generated compressed air is connected to the air compressor 1.

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 first.

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 discharge port 3 may be included in various devices.

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 refrigerating 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 matter whether it is a refrigeration type, a hollow fiber membrane type, or an adsorption type, and is not particularly limited, but a refrigeration type air dryer is generally used. It is 6. The refrigerating 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. 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.

Next, the temperature and humidity measurement structure according to the present invention will be described.
A branch pipe 20 and a merge pipe 22 are connected to a pipe line 2 arranged between various devices. The branch pipe 20 and the merging pipe 22 are hollow pipes for supplying compressed air branched in three directions, and are formed in, for example, a substantially T-shape or a substantially Y-shape. The branch pipe 20 is arranged so as to branch a part of the compressed air in the pipe line 2 and send the air to the inflow pipe 24. Further, the confluence pipe 22 is arranged so as to return the compressed air supplied from the outflow pipe 26 to the pipe line 2.

Regarding the connection mode of the branch pipe 20 and the merging pipe 22 to the pipe line 2, the branch pipe 20 is connected to the upstream side of the pipe line 2 and the merging pipe 22 is connected to the downstream side due to the configuration of the branching and merging of the compressed air. It becomes the aspect to be performed. However, a mode in which the branch pipe 20 and the merge pipe 22 are arranged across various devices cannot be adopted. This is because if the branch pipe 20 is connected to the front stage of various devices and the merging pipe 22 is connected to the rear stage, the branched compressed air will join the piping line 2 without passing through the equipment.

One end of the inflow pipe 24 is connected to the branch pipe 20, and the other end of the inflow pipe 24 is connected to the inflow port 32 of the pressure vessel 30. That is, the inflow pipe 24 is a hollow pipe for supplying compressed air, and is arranged so as to supply the compressed air branched from the piping passage 2 via the branch pipe 20 to the pressure vessel 30. ..

The pressure vessel 30 is a hollow container for measuring the temperature and humidity of the compressed air, and as shown in FIG. 2, the inflow port 32 for inflowing the compressed air sent from the inflow pipe 24, and the inflow port 32, and , An outflow port 34 for letting the compressed air in the container flow out to the outflow pipe 26 is provided. The shape of the pressure vessel 30 is not particularly limited, but is preferably a substantially cylindrical shape in consideration of resistance to pressure of compressed air and the like. In the drawings, the structure of the pressure vessel 30 is illustrated by closing both ends of a substantially cylindrical hollow cylinder 30a with a closing lid 30b, but the structure is not limited to such a structure. It is also possible to consider a mode in which all of the hollow cylinders are integrally molded, or a structure in which only the other open end of the hollow cylinder 30a formed by closing one end in advance is closed by the closing lid 30b.

A measuring instrument 40 is provided inside the pressure vessel 30. The measuring instrument 40 is for measuring the temperature and humidity of the compressed air that has flowed into the pressure vessel 30 from the piping path 2 through the inflow pipe 24, and specifically, a thermometer and a hygrometer are used. It is housed in the pressure vessel 30. Such a thermometer and a hygrometer may be accommodated separately, or may be accommodated as an integrated thermometer and hygrometer. In addition to the analog type that visually confirms the memory showing the temperature and humidity as shown in FIG. 1 (a), the digital display that digitally displays the values measured by the sensors as shown in FIGS. 1 (b) and 2 on the display panel. It may be of the formula.

Incidentally, for the material of the pressure vessel 30 is not particularly limited, in order to the internal container and visible, Ru formed is formed by at least partially transparent or translucent glass or synthetic resin material. By making the inside of the container visible, the measured values of temperature and humidity can be immediately visually confirmed, and the state of the compressed air flowing into the pressure vessel 30 and abnormalities in the container can be directly visually confirmed. For example, it is possible to instantly determine the case where drainage is generated in the container.

It is preferable that the pressure vessel 30 is provided with a medium for displaying the date and time, such as a digital clock for notifying the date and time, in addition to the measuring instrument 40. By adopting such an embodiment, the measurement date and time and the measured values of temperature and humidity can be visually confirmed at the same time, and the recording and management of the measurement results can be facilitated. At this time, if the measuring instrument 40 is a digital type, it is conceivable that the date and time are digitally displayed on the display panel together with the measured values.

One end of the outflow pipe 26 is connected to the merging pipe 22, and the other end of the outflow pipe 26 is connected to the outflow port 34 of the pressure vessel 30. That is, the outflow pipe 26 is a hollow pipe for supplying compressed air, and is arranged so as to return the compressed air flowing out from the pressure vessel 30 to the piping line 2 via the confluence pipe 22.

The pressure vessel 30 is used to measure the pressure of the compressed air in the pressure vessel 30, more specifically, the pressure of the compressed air from the branch pipe 20 through the inflow pipe 24, the pressure vessel 30, and the outflow pipe 26 to the confluence pipe 22. It is conceivable that the pressure gauge 36 is provided at a predetermined location of the above, or at a predetermined intermediate location of the inflow pipe 24 or the outflow pipe 24. By adopting such an embodiment, the pressure of the compressed air in the pressure vessel 30 can be monitored, and the pressure of the compressed air in the piping line 2 and the pressure of the compressed air in the pressure vessel 30 can be kept uniform. Contribute to. As the pressure gauge 36, it is sufficient to use a conventional one, and there is no particular limitation. The location where the pressure gauge 36 is installed is not particularly limited as long as it extends from the branch pipe 20 to the merging pipe 22 via the inflow pipe 24, the pressure vessel 30, and the outflow pipe 26, but is easy to install. In view of the above, for example, the vicinity of the inflow port 32 and the outflow port 34 in the pressure vessel 30, the vicinity of the other end of the inflow pipe 24 (inflow port 32), the vicinity of the other end of the outflow pipe 24 (outflow port 34), and the like can be considered.

A mode in which the drain trap 10 is provided in the pressure vessel 30 can be considered. Although the pressure vessel 30 is branched from the piping passage 2, it is still a flow path through which compressed air is supplied, and it is assumed that drainage is generated and stored in the vessel. .. If the drain remains stored in the container, the sensor 42 in the container may malfunction, hindering accurate temperature and humidity measurement, and causing a failure of the sensor 42 itself. It could be. Therefore, it is desirable to provide a drain trap 10 in the pressure vessel 30 in order to drain the drain generated in the vessel.

The pressure vessel 30 is used by placing it on a desk so that the measured value can be easily visually recognized. At this time, as shown in the drawing, it is conceivable that the leg 38 is provided at a predetermined position of the pressure vessel 30 and the pressure vessel 30 is raised to a height position where it is easy to see.

From each of the above components, the temperature and humidity measurement structure in the compressed pneumatic circuit according to the present invention is constructed. The mainstream flow of compressed air in the present invention is as follows. That is, the compressed air generated by the air compressor 1 is first sent to various devices such as the aftercooler 4, the air tank 5, the air dryer 6, the air filter 7, and the centrifuge 8 through the piping line 2. After that, the compressed air is finally sent from various devices to the discharge port 3 via the piping line 2 and used for various purposes.

The tributary flow of compressed air in the present invention is as follows. That is, a part of the compressed air of the main stream passing through the pipe line 2 is branched into a tributary by the branch pipe 20 connected to the pipe line 2, and is entered into the pressure vessel 30 from the inflow port 32 via the inflow pipe 24. Inflow. Then, the temperature and humidity are measured when passing through the pressure vessel 30, and the air flows out from the outflow port 34 to the outflow pipe, and then returns to the mainstream compressed air passing through the pipe line 2 through the confluence pipe 22. Is done.

As described above, according to the temperature and humidity measurement structure in the compressed air pressure circuit according to the present invention, the compressed air flowing through the pipe line 2 is branched, the temperature and humidity are measured in the pressure vessel 30, and then the pipe line 2 is again used. By adopting a measurement structure that merges with the compressed air, the pressure of the compressed air in the piping line 2 and the pressure of the compressed air in the pressure vessel 30 are kept uniform, and the flow of the compressed air is not stressed in the compressed air. It is possible to accurately measure the temperature and humidity of the compressed air, and it is possible to easily determine whether or not the compressed air is in a state where drainage can occur based on the measurement results. It is a thing.

Regarding the temperature and humidity measurement structure from the branch pipe 20 according to the present invention to the merging pipe 22 through the inflow pipe 24, the pressure vessel 30, and the outflow pipe 26, one or more temperatures and a plurality of temperatures are used in one compressed pneumatic circuit. A humidity measuring structure can be arranged. FIG. 1 (a) shows a case where two units are arranged, and FIG. 1 (b) shows a case where one unit is arranged for measuring temperature and humidity. That is, the number of piping lines 2 existing between the devices is also determined by the number of various devices mounted on the compressed air pressure circuit, and the temperature and humidity measurement structure according to the present invention can be arranged between the devices. Since it is possible and can be arranged without giving stress to the flow of compressed air, even if a plurality of temperature and humidity measurement structures are arranged, there is almost no effect on the entire compressed air pressure circuit.

Next, another embodiment of the temperature and humidity measurement structure in the compressed pneumatic circuit according to the present invention will be described with reference to FIGS. 3 and 4. The description of the same part as that of the first embodiment will be omitted.
3 and 4 are explanatory views showing an embodiment of a temperature and humidity measurement structure in the compressed pneumatic circuit according to the present invention, FIG. 3 shows an overall outline of the compressed pneumatic circuit, and FIG. 4 shows the front surface of the pressure vessel 30. The figure is shown.

In the first embodiment, the measuring instrument 40 is an analog thermometer or a hygrometer that visually confirms a memory indicating the temperature or humidity, or a digital thermometer that digitally displays the value measured by the sensor on the display panel. And a hygrometer were adopted, and a mode in which the measuring instrument 40 was housed inside the pressure vessel 30 was described. However, the pressure vessel 30 is in a state where pressure due to compressed air is constantly present, and it is assumed that some thermometers and hygrometers may malfunction or malfunction due to the problem of pressure resistance, which hinders accurate measurement. Can be done.

Therefore, instead of accommodating a thermometer or a hygrometer as it is inside the pressure vessel 30, only a sensor 42 capable of measuring temperature and humidity is accommodated as a measuring instrument 40, and the temperature and humidity measured by the sensor 42 are pressured. A mode of displaying on the outside of the container 30 can be considered.

That is, a sensor 42 is provided as a measuring instrument 40 inside the pressure vessel 30 according to the present embodiment. The sensor 42 is for measuring the temperature and humidity of the compressed air that has flowed into the pressure vessel 30 from the piping path 2 through the inflow pipe 24, and the measured value is the pressure via the sensor code 44. It is sent to the display unit 46 existing outside the container 30, and is digitally displayed on the display unit 46.

It is desirable that the display unit 46 has not only a function of digitally displaying the measured values of temperature and humidity in the sensor 42 but also a function of displaying the date and time. By displaying the date and time together with the measured values of temperature and humidity, the measured date and time and the measured value can be visually confirmed at the same time, and the recording and management of the measurement result becomes easy.

Although not shown, it is conceivable that the sensor 42 includes a recording unit for automatically recording the measured values of the temperature and humidity of the compressed air inside the pressure vessel 30. The recording unit is a recording medium such as a hard disk, and can record the contents displayed on the display unit 46 as it is, including the measured value by the sensor 42, via the sensor code 44 together with the date and time. The measured values of the sent temperature and humidity are automatically recorded at predetermined time intervals. Further, the pressure of the compressed air in the pressure vessel 30 by the pressure gauge 36 can also be recorded at the same time. By adopting such a configuration mode, it contributes to the record of the administrator and the reduction of the management burden.

In addition, based on the content displayed on the display unit 46 and the content recorded on the recording unit, the normality or abnormality of the compressed air, the change in the situation, etc. are monitored, the drain occurrence probability is automatically calculated, and an alarm or notification is issued as necessary. It is also possible to consider an embodiment including a monitoring and controlling unit that emits light. 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 temperature and humidity measurement structure in the compressed air pressure circuit according to the present invention, by providing the sensor 42 capable of measuring the temperature and humidity inside the pressure vessel 30, a device failure or malfunction under pressure is provided. It is possible to accurately and surely measure the temperature and humidity in the compressed air without causing such a problem.

The temperature and humidity measurement structure from the branch pipe 20 to the merging pipe 22 through the inflow pipe 24, the pressure vessel 30, and the outflow pipe 26 according to the present invention is the same as that in the first embodiment. One or more temperature and humidity measurement structures can be arranged in the above, and FIG. 3 shows a case where four temperature and humidity measurement structures are arranged.

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 "temperature and humidity measurement structure in the compressed pneumatic circuit" according to the present invention is great.

1 Air compressor 2 Piping line 3 Discharge port 4 Aftercooler 5 Air tank 6 Air dryer 7 Air filter 8 Centrifugal separator 10 Drain trap 20 Branch pipe 22 Confluence pipe 24 Inflow pipe 26 Outflow pipe 30 Pressure vessel 30a Hollow cylinder 30b Closure lid 32 Inlet 34 Outlet 36 Pressure gauge 38 Leg 40 Measuring instrument 42 Sensor 44 Sensor code 46 Display

Claims (6)

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 branch pipe is connected to the upstream side of the piping line arranged between various devices, and a confluence pipe is connected to the downstream side.
One end of the inflow pipe is connected to the branch pipe, and one end of the outflow pipe is connected to the merge pipe.
The other end of the inflow pipe is connected to the inlet of the pressure vessel, and the other end of the outflow pipe is connected to the outlet of the pressure vessel.
At least a part of the pressure vessel is made of a transparent or translucent material that allows the inside of the vessel to be seen.
The pressure vessel is equipped with measuring instruments for measuring temperature and humidity.
A part of the compressed air in the piping line arranged between various devices flows into the pressure vessel through the inflow pipe by the branch pipe, and the compressed air in the pressure vessel flows from the confluence pipe through the outflow pipe. By returning to the piping path, the pressure of the compressed air in the piping path and the pressure of the compressed air in the pressure vessel are kept uniform, and the temperature and humidity in the pressure vessel are measured to measure the compressed air. A temperature and humidity measuring structure in a compressed air pressure circuit, which measures the temperature and humidity of a compressed air pressure vessel under pressure. The temperature in the compressed air pressure circuit according to claim 1, wherein a pressure gauge for measuring the pressure of compressed air is provided at a predetermined location of the pressure vessel or a predetermined intermediate portion of the inflow pipe or the outflow pipe. And humidity measurement structure. The claim is characterized in that the measuring instrument is a sensor capable of measuring temperature and humidity, and a display unit for digitally displaying the measured values of temperature and humidity measured by the sensor is provided outside the pressure vessel. 1 or the temperature and humidity measuring structure in the compressed pneumatic circuit according to claim 2. The temperature and humidity measurement structure in the compressed pneumatic circuit according to claim 3 , wherein the display unit is provided with a function of displaying a date and time. The temperature and humidity measuring structure in the compressed pneumatic circuit according to claim 3 , further comprising a recording unit, wherein the measured values of temperature and humidity are automatically recorded at predetermined time intervals together with the date and time. The temperature and humidity measuring structure in the compressed pneumatic circuit according to any one of claims 1 to 5 , wherein the pressure vessel is provided with a drain trap.

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