Compressed air filter device

Abstract

To provide a particulate detection device for compressed air that makes it possible to accurately evaluate the contamination of compressed air and to provide a filter device for compressed air that makes it possible to accurately know when to replace a filter.SOLUTION: A particulate detection device 100 for compressed air includes a housing 10, a particulate sensor 7, and a substrate 9. The housing 10 is formed with a storage chamber 3c for storing compressed air. The particulate sensor 7 is provided in the storage chamber 3c and is capable of detecting particulates in the compressed air in the storage chamber 3c and outputting a signal. The substrate 9 is electrically connected to the particulate sensor 7 and processes signals to evaluate the contamination of the compressed air. A single connecting port 3d is formed in the housing 10, which takes compressed air into the storage chamber 3c and discharges compressed air out of the storage chamber 3c.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention , pressure Compressed air filter device Place Regarding. [Background technology]

[0002] Patent Document 1 discloses a conventional compressed air filter device. This compressed air filter device includes a filter housing and a filter. The filter housing has an inlet passage through which unfiltered compressed air is introduced, an outlet passage provided downstream of the inlet passage through which filtered compressed air is discharged, and a filtering chamber formed between the inlet passage and the outlet passage. The filter is replaceably provided within the filtering chamber. Furthermore, in this compressed air filter device, an inlet-side pressure gauge that displays the pressure of the unfiltered compressed air is provided in the inlet passage, and an outlet-side pressure gauge that displays the pressure of the filtered compressed air is provided in the outlet passage.

[0003] This compressed air filter device has an inlet passage connected to an air compressor and an outlet passage connected to pneumatic equipment such as an air gun. The filter filters out fine particles such as oil, moisture, and foreign matter from the compressed air generated by the air compressor and introduced through the inlet passage. As a result, the compressed air discharged from the outlet passage has these fine particles removed, allowing it to demonstrate high quality in processes using pneumatic equipment.

[0004] In this compressed air filter device, after long-term use, fine particles in the compressed air are adsorbed and deposited on the filter, reducing the effectiveness of purifying the compressed air. Therefore, it is recommended that the filter be replaced according to the filter's lifespan. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-63737 Summary of the Invention [Problem to be solved by the invention]

[0006] However, if the filter in a compressed air filter device is replaced periodically, there is a risk that the filter will be replaced unnecessarily and that the replacement of a filter that is truly necessary will be delayed.

[0007] In compressed air filter devices, the pressure loss can be determined from the difference between the readings on the inlet and outlet pressure gauges, and the filter can be replaced based on this pressure loss. However, if the filter fibers expand, for example, the lifespan of the filter is not necessarily reflected in the pressure loss. Therefore, even in this case, the filter cannot necessarily be replaced at the appropriate time.

[0008] In this regard, a conventional particulate matter sensor is disclosed in Utility Model Registration No. 3214850. This particulate matter sensor has a cover, a light-emitting unit, a light-receiving unit, and a heat-generating unit. The cover has an intake port and an exhaust port that communicate with the outside, and a detection chamber that communicates with the intake port and exhaust port is formed inside the cover. The light-emitting unit, light-receiving unit, and heat-generating unit are located inside the detection chamber. The light-emitting unit emits light into the air in the inspection chamber, and the light-receiving unit receives light scattered by particulate matter such as moisture and oil in the air. The heat-generating unit raises the air in the inspection chamber.

[0009] In this particle sensor, air outside the cover is drawn into the testing chamber through an air intake port, and air inside the testing chamber is expelled through an exhaust port. During this time, the light-emitting unit emits light onto the air rising inside the testing chamber using a heat-generating unit, and the light-receiving unit receives the light scattered by particles in the air. By electrically connecting a circuit board to the particle sensor and processing the signal detected by the light-receiving unit using the circuit board, it is possible to evaluate the contamination of the air outside the particle sensor.

[0010] However, the conventional particulate sensor can only evaluate the contamination of air under atmospheric pressure, and cannot accurately evaluate the contamination of compressed air. Therefore, even if this particulate sensor is used in the compressed air filter device, it is not possible to accurately determine when to replace the filter.

[0011] The present invention has been made in view of the above-mentioned conventional situation. ,centre The problem to be solved is to provide a compressed air filter device that can accurately tell when the filter needs to be replaced. [Means for solving the problem]

[0012] The present invention The compressed air filter device is a compressed air filter device provided with a compressed air particulate detection device, The compressed air particle detection device is a housing having a storage chamber for storing compressed air; a particulate matter sensor provided in the storage chamber, capable of detecting particulate matter in the compressed air in the storage chamber and outputting a signal; a substrate electrically connected to the particle sensor and configured to process the signal and evaluate the contamination of the compressed air; The housing is formed with a single communication port for taking in the compressed air into the storage chamber and discharging the compressed air from the storage chamber. 、 The compressed air filter device includes a filter housing having an inlet passage into which unfiltered compressed air is introduced, an outlet passage provided downstream of the inlet passage and from which the filtered compressed air is discharged, and a filtering chamber formed between the inlet passage and the outlet passage; a replaceable filter provided in the filtering chamber, filtering fine particles in the compressed air introduced through the introduction passage and discharging the filtered air through the discharge passage; The filter housing is integral with the housing, and the compressed air particle detector is provided so that the communication port communicates with the outlet passage. .

[0013] The present invention In compressed air filter devices, Compressed air particle detector In A storage chamber for storing compressed air is formed in the housing, and a particulate sensor is provided in this storage chamber. Therefore, if the particulate sensor detects particulates in the compressed air in the storage chamber and outputs a signal, the contamination of the compressed air can be evaluated using the substrate.

[0014] In particular, in this compressed air particle detector, a single communication port is formed in the housing, and this communication port takes in compressed air into the storage chamber and discharges compressed air from the storage chamber. Therefore, air flow is unlikely to occur within the storage chamber. Therefore, even if compressed air is being used downstream, compressed air does not flow forcefully within the storage chamber. Therefore, the present invention In compressed air filter devices, Compressed air particle detector In Even if compressed air is used downstream, the particulate sensor can easily detect particulates in the compressed air in the storage chamber, and the substrate can accurately evaluate the contamination of the compressed air.

[0015] The compressed air filter device of the present invention comprises a filter housing having an inlet passage through which unfiltered compressed air is introduced, an outlet passage provided downstream of the inlet passage and through which the filtered compressed air is discharged, and a filtering chamber formed between the inlet passage and the outlet passage; a replaceable filter provided in the filtering chamber, filtering fine particles in the compressed air introduced through the inlet passage and discharging the compressed air through the outlet passage, The filter housing is characterized in that the compressed air particle detector is provided integrally with the housing, and the communication port communicates with the outlet passage.

[0016] In the compressed air filter device of the present invention, the filter housing is integrated with the housing of the compressed air particle detection device, so there is no need to prepare a separate compressed air particle detection device.

[0017] The compressed air filtered by the filter is taken into the storage chamber through the outlet passage and the communication port, and is then discharged from the storage chamber through the communication port into the outlet passage. Therefore, even if compressed air is being used downstream of the compressed air filter device, the filter contamination can be accurately evaluated using the compressed air filter device itself. Therefore, the compressed air filter device of the present invention itself can accurately determine when to replace the filter.

[0018] The housing of the compressed air particle detection device may include a base member, a first housing, and a second housing. The base member has a first surface on which the particle sensor is provided, and a second surface opposite the first surface on which the substrate is provided. The base member has an insertion hole extending from the first surface to the second surface. The first housing is fixed to the first surface in a sealed state. The first housing forms a storage chamber together with the first surface, surrounds the particle sensor, and has a communication port formed therein. The second housing is fixed to the second surface. The second housing surrounds the substrate together with the second surface. It is preferable that the particle sensor and the substrate are connected by a lead wire that is inserted and sealed through the insertion hole. In this case, the particle sensor can be provided in the storage chamber while the substrate is provided in the atmosphere, allowing the substrate to operate stably and extending its lifespan.

[0019] The substrate preferably has a warning unit that issues a warning based on the signal, allowing the user to assess the contamination of the compressed air or the filter.

[0020] The substrate preferably has a communication unit capable of communicating information based on the signal. In this case, a user can evaluate the contamination of the compressed air and the filter using a PC, smartphone, or the like that can communicate with the communication unit. [Effects of the Invention]

[0022] Furthermore, the compressed air filter device of the present invention can accurately indicate when it is time to replace the filter, particularly when compressed air is being used downstream. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a perspective view of a particle detector for compressed air according to a first embodiment, as viewed from a certain angle. [Figure 2] FIG. 2 is a perspective view of the particle detector for compressed air according to the first embodiment, seen from another angle. [Figure 3] FIG. 3 is an exploded perspective view of the particle detector for compressed air according to the first embodiment, as viewed from a certain angle. [Figure 4] FIG. 4 is an exploded perspective view of the particle detector for compressed air according to the first embodiment, as viewed from another angle. [Figure 5] FIG. 5 is a horizontal cross-sectional view of the particle detection device for compressed air and the like according to the first embodiment. [Figure 6] FIG. 6 is a block diagram of the circuit board and other components of the particle detector for compressed air according to the first embodiment. [Figure 7] FIG. 7 is a front view showing the state in which the particle detector for compressed air of the first embodiment is used. [Figure 8] FIG. 8 is a diagram showing another state of use of the particle detection device for compressed air according to the first embodiment. [Figure 9] FIG. 9 is a perspective view showing a compressed air filter device according to a second embodiment. [Figure 10] FIG. 10 is a vertical cross-sectional view of a compressed air filter device according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, first and second embodiments of the present invention will be described with reference to the drawings.

[0025] Example 1 As shown in Figures 1 to 4, the particle detection device for compressed air 100 of the first embodiment includes a metal base member 1, a metal first housing 3, and a resin second housing 5. The base member 1, the first housing 3, and the second housing 5 correspond to a housing 10. Furthermore, as shown in Figures 3 to 5, the particle detection device for compressed air 100 includes a particle sensor 7, a substrate 9, O-rings 11 and 13, a grommet 15, and a transparent seal 17.

[0026] As shown in Figures 4 and 5, the base member 1 comprises a flat plate portion 19 having a substantially square shape in a plan view, and a protruding portion 21 protruding from the flat plate portion 19. The protruding portion 21 protrudes in a short cylindrical shape with its center line on an axis X extending from the center of the flat plate portion 19 in the thickness direction. The tip surface of the protruding portion 21 is the first surface 1a, and the bottom surface of the flat plate portion 19, which is the back surface of the first surface 1a, is the second surface 1b. The first surface 1a and the second surface 1b are connected by an insertion hole 1c. A male thread 1d is formed on the circumferential surface of the protruding portion 21. Furthermore, screw holes 1e and 1f for fixing the particle sensor 7 are recessed in the first surface 1a.

[0027] The first housing 3 is composed of a cylindrical portion 23 having a cylindrical shape with the axis X as its center line, and a disk portion 25 that is disk-shaped at the tip of the cylindrical portion 23. As shown in FIG. 5 , a tapered surface 3a is formed on the inside of the tip of the cylindrical portion 23, opposite the disk portion 25. An O-ring 11 is provided between the tapered surface 3a and the flat portion 19 of the base member 1. In addition, a female thread 3b is formed on the inner circumferential surface of the cylindrical portion 23, continuing from the tapered surface 3a. The female thread 3b is adapted to threadably engage with the male thread 1d of the protrusion 21 of the base member 1.

[0028] The first housing 3 is fixed to the base member 1 by screwing the female thread 3b onto the male thread 1d while providing an O-ring 11 between the tapered surface 3a and the flat plate portion 19. As a result, the inner surface of the first housing 3 and the first surface 1a of the base member 1 form a storage chamber 3c.

[0029] A single communication port 3d is formed through the disk portion 25 of the first housing 3, with the axis X as its center line. A female thread 3e is formed in the communication port 3d. The communication port 3d communicates the storage chamber 3c with the outside.

[0030] 3 and 5, the second housing 5 is made up of a rectangular tube portion 27 having a substantially rectangular tube shape and a flat plate portion 29 having a substantially square shape in a plan view at the tip of the rectangular tube portion 27. As shown in FIG. 5, a rectangular annular ring groove 5a is formed at the tip of the rectangular tube portion 27 opposite the rectangular plate portion 29. In addition, a cover portion 5b is formed on the rectangular tube portion 27 on the outer periphery of the ring groove 5a. The cover portion 5b is adapted to fit into the peripheral surface of the flat plate portion 19 of the base member 1.

[0031] The second housing 5 is fixed to the base member 1 by fitting the cover portion 5b to the flat plate portion 19 of the base member 1 while providing an O-ring 13 in the ring groove 5a. As a result, the inner surface of the second housing 5 and the second surface 1b of the base member 1 form a board chamber 5c.

[0032] 2 and 3, an air hole 5d is formed through the rectangular tube portion 27 of the second housing 5. The air hole 5d connects the board chamber 5c to the outside. A grommet 15 is fitted into the air hole 5d. Mounting holes 5h and 5i are provided on the left and right sides of the air hole 5d for mounting the rectangular tube portion 27 to a bracket or the like.

[0033] 1 and 3, confirmation windows 5e, 5f, and 5g are formed through the rectangular plate portion 29 of the second housing 5. The confirmation windows 5e, 5f, and 5g connect the board chamber 5c to the outside.

[0034] As shown in Figures 3 to 5, the particulate sensor 7 is fixed to the first surface 1a of the base member 1 by threading screws 31a and 31b into screw holes 1e and 1f in the base member 1, and is provided inside the storage chamber 3c. The particulate sensor 7 is formed with an intake port 7a and an exhaust port 7b, and has a light-emitting section and a light-receiving section inside. The intake port 7a and the exhaust port 7b connect the inside of the particulate sensor 7 to the storage chamber 3c. The light-emitting section and the light-receiving section are made up of LEDs.

[0035] As shown in Fig. 4, the substrate 9 is fixed to the square plate portion 29 of the second housing 5 by threading screws 33a to 33d into screw holes (not shown) in the second housing 5, and is provided inside the storage chamber 3c. As shown in Fig. 5, the particulate matter sensor 7 and the substrate 9 are connected by a lead wire 35. The lead wire 35 is inserted through an insertion hole 1c of the base member 1. The lead wire 35 is inserted through the insertion hole 1c in a sealed state with grease to keep the storage chamber 3c airtight.

[0036] As shown in FIG. 6, the board 9 is provided with an input interface 9a, a microcomputer 9b, an output interface 9c, a display device 9d, a communication device 9e, and a power supply circuit (not shown). The display device 9d corresponds to the warning unit. When activated, the communication device 9e enables infrared communication, short-range wireless communication such as Bluetooth (registered trademark), or wireless communication such as Wi-Fi (registered trademark). The communication device 9e corresponds to the communication unit. The board 9 is also provided with a reset button, an operation lamp, a power lamp, etc. A power cord (not shown) connected to the power supply circuit is inserted through the grommet 15 in a sealed state to prevent moisture from entering the board chamber 5c.

[0037] As shown in Figures 1 and 3, a transparent seal 17 is attached to the corner plate portion 29 of the second housing 5, allowing the confirmation windows 5e, 5f, and 5g to be seen while preventing moisture from entering the circuit board chamber 5c. A reset button is provided in the center of the confirmation window 5e, and the operation lamp can be seen through the confirmation window 5e. When the user presses the reset button, the microcomputer returns to its initial state. If the operation lamp is lit, it is clear that the compressed air particle detection device 100 is operating. The confirmation window 5f allows the warning lamp on the display device 9d to be seen through. If the warning lamp is off, the compressed air is clean. If the warning lamp is lit red, the compressed air is contaminated. The confirmation window 5g allows the power lamp to be seen. If the power lamp is lit, it is clear that power is being supplied to the circuit board 9 and the particle sensor 7.

[0038] The compressed air particle detection device 100 configured as described above can be used together with a compressed air filter device 50, as shown in Fig. 7. The compressed air filter device 50 is known from Patent Document 1 and the like.

[0039] In this case, the piping 53 connected to the air compressor 51 is connected to the inlet passage 50a of the compressed air filter device 50, and the piping 57 connected to the pneumatic equipment 55 is connected to the outlet passage 50b of the compressed air filter device 50.

[0040] 5, an opening 57a is formed in the piping 57, and a branch pipe 59 is threadedly connected to the opening 57a. A male thread 59a is formed in the branch pipe 59, and the female thread 3e of the particle detection device 100 for compressed air is threadedly engaged with the male thread 59a.

[0041] Compressed air generated by air compressor 51 is introduced into compressed air filter device 50 from inlet passage 50a via piping 53, and fine particles such as oil, moisture, and foreign matter are filtered out by a filter (not shown) of compressed air filter device 50. As a result, compressed air discharged from outlet passage 50b via piping 57 is led to pneumatic equipment 55, and high quality air is exhibited in processes using pneumatic equipment 55.

[0042] 5, the compressed air in pipe 57 passes through opening 57a, branch pipe 59, and communication port 3d and enters storage chamber 3c of compressed air particle detection device 100. The compressed air in storage chamber 3c is taken into particle sensor 7 through intake port 7a and discharged into storage chamber 3c through exhaust port 7b. The light-emitting element projects light onto the compressed air in particle sensor 7, and the light-receiving element receives the light projected by the light-emitting element.

[0043] The analog output of the particle sensor 7 is converted into a digital signal via an A / D conversion circuit in the input interface 9a, processed by the microcomputer 9b, and sent to the output interface 9c. The microcomputer 9b compares the amount of airborne particles detected by the particle sensor 7 with a threshold value, and if it determines that the amount of airborne particles exceeds the threshold value by a certain amount or more, it activates the display device 9d and communication device 9e via the output interface 9c.

[0044] When the display device 9d is activated, the warning lamp lights up in red and the user can see through the confirmation window 5f that the compressed air is contaminated. In other words, the compressed air particle detection device 100 can evaluate the contamination of the compressed air filtered by the compressed air filter device 50.

[0045] In particular, in this compressed air particle detection device 100, only a single communication port 3d is formed in the housing 10. For this reason, the compressed air in the storage chamber 3c moves in reverse through the communication port 3d that takes in the compressed air, through the branch pipe 59, and through the opening 57a before being discharged into the piping 57, making it difficult for air to flow within the storage chamber 3c. For this reason, even when compressed air is being used in downstream pneumatic equipment 55, the compressed air does not flow forcefully within the storage chamber 3c, making it easier for the particle sensor 7 to detect particles in the compressed air in the storage chamber 3c, and enabling the substrate 9 to accurately evaluate the contamination of the compressed air.

[0046] Therefore, according to the compressed air particle detection device 100 of the first embodiment, it is possible to accurately evaluate the contamination of compressed air even when compressed air is being used downstream, and it is therefore possible to accurately know when to replace the filter of the compressed air filter device 50.

[0047] Furthermore, in this compressed air particle detection device 100, the particle sensor 7 is provided in the storage chamber 3c while the substrate 9 is provided under the atmosphere, which allows the substrate 9 to operate stably and extends the life of the substrate 9.

[0048] Furthermore, in this compressed air particle detection device 100, the substrate 9 has a display device 9d, and the second housing 5 is formed so that the display device 9d can be seen, so that the user can visually evaluate the dirtiness of the compressed air and the dirtiness of the filter.

[0049] Furthermore, in this compressed air particle detection device 100, the substrate 9 has a communication device 9e, so as shown in Figure 8, even if the user is away from the compressed air particle detection device 100, the user can evaluate the contamination of the compressed air and the filter using a smartphone 14 or the like that can communicate with the communication device 9e.

[0050] In the above-mentioned first embodiment, the display device 9d visually notifies the user of the contamination of the compressed air or the filter, but in another embodiment, it is also possible to adopt an audio output device as the warning unit and configure the device to notify the user of the contamination of the compressed air or the filter by voice or sound.

[0051] Example 2 As shown in FIGS. 9 and 10, the second embodiment is a compressed air filter device 200 to which the compressed air particle detection device 100 of the first embodiment is integrally assembled.

[0052] This compressed air filter device 200 includes a metal partition member 61, a resin upper housing 63 provided on the upper part of the partition member 61, and a resin lower housing 65 provided on the lower part of the partition member 61. The partition member 61, the upper housing 63, and the lower housing 65 correspond to a filter housing.

[0053] 10, the partition member 61 is formed with an upper cylindrical portion 61a that protrudes upward in a cylindrical shape and a lower cylindrical portion 61b that protrudes downward in a cylindrical shape. A female thread 61c is formed on the inner periphery of the upper cylindrical portion 61a, and a female thread 61d is formed on the inner periphery of the lower cylindrical portion 61b.

[0054] The upper housing 63 is cylindrical and has a bottom and an opening at the bottom. A male thread 63a is formed on the lower end of the outer circumferential surface of the upper housing 63, and is adapted to be threadedly engaged with the female thread 61c of the partition member 61. By threading the male thread 63a into the female thread 61c, an upper filtration chamber 71 is formed by the partition member 61 and the upper housing 63.

[0055] The lower housing 65 is cylindrical and has an opening at the top. An external thread 65a is formed on the upper end of the outer circumferential surface of the lower housing 65, and is adapted to be threadedly engaged with the internal thread 61d of the partition member 61. By threading the external thread 65a into the internal thread 61d, a lower filtration chamber 73 is formed by the partition member 61 and the lower housing 65.

[0056] An inlet passage 67 and an outlet passage 69 are formed in the partition member 61. The inlet passage 67 has an opening 67a at one horizontal end of the partition member 61, extends horizontally, then bends downward at the center of the partition member 61, and opens into the lower filtration chamber 73 through an opening 67b. The outlet passage 69 has an opening 69a at the other horizontal end of the partition member 61, extends horizontally, then bends upward at the center of the partition member 61, and opens into the upper filtration chamber 71 through an opening 69b. In addition, a plurality of communication passages 75 are formed in the outer periphery of the partition member 61, vertically connecting the lower filtration chamber 73 and the upper filtration chamber 71.

[0057] The partition member 61 is formed with an upper boss 61e that protrudes upward around the opening 69b and a lower boss 61f that protrudes downward around the opening 67b. A boss 63b that is coaxial with the upper boss 61e and protrudes downward is formed on the inner surface of the upper housing 63. A cylindrical upper filter 77 is held between the upper boss 61e and the boss 63b. The upper filter 77 can be removed from the upper boss 61e and the boss 63b by unscrewing the female thread 61c of the partition member 61 from the male thread 63a of the upper housing 63.

[0058] A lower filter 79 is held by the lower boss 61f. The lower filter 79 has an inner filter 79a that covers the opening 67b and an outer filter 79b that is cylindrical and located outside the inner filter 79a. The lower filter 79 can be removed from the lower boss 61f by unscrewing the female threads 61d of the partition member 61 from the male threads 65a of the lower housing 65. The upper filter 77 and the lower filter 79 correspond to filters.

[0059] A drain opening 65b is formed at the bottom end of the lower housing 65 from above and below, and a drain device 81 is attached to the drain opening 65b.

[0060] This compressed air filter device 200 also includes an inlet pressure gauge 83 using a Bourdon tube, and the compressed air particle detection device 100 of Example 1. The inlet pressure gauge 83 is configured to detect the pressure inside the introduction passage 67. In the compressed air particle detection device 100, the partition member 61 is integrated with the first housing 3, and the communication port 3d communicates with the outlet passage 69.

[0061] When this compressed air filter device 200 is connected to the air compressor 51, compressed air supplied from the air compressor 51 is introduced from the opening 67a into the introduction passage 67. The pressure of the compressed air at this time is displayed by the inlet side pressure gauge 83.

[0062] The compressed air introduced into the introduction passage 67 passes through the opening 67b and is filtered by the inner filter 77a of the lower filter 77. The compressed air that has passed through the inner filter 77a is filtered by the outer filter 77b of the lower filter 77 and is introduced into the communication passage 75. Oil and moisture separated during this process are discharged to the outside by the drain device 79.

[0063] The compressed air that has passed through the communication passage 75 is guided to the outer periphery of the upper filter 77 and filtered by the upper filter 77. The compressed air that has been filtered by the upper filter 77 is guided from the opening 69b to the outlet passage 69 and discharged downstream from the opening 69a.

[0064] In this case, in this compressed air filter device 200, since the partition member 61 is integrated with the first housing 3 of the compressed air particulate matter detection device 100, there is no need to prepare a separate compressed air particulate matter detection device 100.

[0065] In addition, in this compressed air filter device 200, the compressed air filtered by the upper filter 77 and the lower filter 79 is supplied to the outlet passage 69. At this time, as shown in Fig. 5, the compressed air is taken from the outlet passage 69 through the communication port 3d into the storage chamber 3c, and is also discharged from the storage chamber 3c into the outlet passage 69 through the communication port 3d.

[0066] Therefore, even when compressed air is used downstream of the compressed air filter device 200, the compressed air filter device 200 itself can accurately evaluate the dirtiness of the upper filter 77 and the lower filter 79. Therefore, the compressed air filter device 200 itself can accurately determine when to replace the upper filter 77 and the lower filter 79.

[0067] The present invention has been described above in accordance with Examples 1 and 2, but it goes without saying that the present invention is not limited to the above Examples 1 and 2, and can be modified and applied as appropriate within the scope of the invention. [Industrial Applicability]

[0068] The present invention can be used in air utilization facilities in factories and the like. [Explanation of symbols]

[0069] 3c…Storage chamber 10...Housing (1...Base member, 3...First housing, 5...Second housing) 7...Particle sensor 9...Substrate 3d…Communication port 100... Compressed air particle detection device 1a…First page 1b…Second side 1c...Through hole 35...Lead wire 9d...Warning section (display device) 9e...Communication unit (communication device) 50a, 67... Entry passage 50b, 69... Lead-out passage 71, 73... Filtration chamber (71... upper filtration chamber, 73... lower filtration chamber) 61, 63, 65...filter housing (61...partition member, 63...upper housing, 65...lower housing) 77, 79...Filter (77...Upper filter, 79...Lower filter) 50, 200... Compressed air filter device

Claims

1. A compressed air filter device provided with a compressed air particle detection device, The particle detection device for compressed air includes a housing having a storage chamber for storing compressed air; a particulate matter sensor provided in the storage chamber, capable of detecting particulate matter in the compressed air in the storage chamber and outputting a signal; a substrate electrically connected to the particle sensor and configured to process the signal and evaluate the contamination of the compressed air; The housing is formed with a single communication port for taking in the compressed air into the storage chamber and discharging the compressed air from the storage chamber, The compressed air filter device includes a filter housing having an inlet passage into which unfiltered compressed air is introduced, an outlet passage provided downstream of the inlet passage and from which the filtered compressed air is discharged, and a filtering chamber formed between the inlet passage and the outlet passage; a replaceable filter provided in the filtering chamber, filtering fine particles in the compressed air introduced through the introduction passage and discharging the filtered air through the discharge passage; The compressed air filter device is characterized in that the compressed air particle detection device is provided in the filter housing so that the housing is integrated with the filter housing and the communication port communicates with the outlet passage.

2. the housing has a first surface on which the particle sensor is provided, and a second surface opposite to the first surface on which the substrate is provided, the base member having an insertion hole formed therein that passes from the first surface to the second surface; a first housing that is fixed to the first surface in a sealing state, that forms the storage chamber together with the first surface, that surrounds the particle sensor, and that has the communication port formed therein; a second housing fixed to the second surface and surrounding the substrate together with the second surface; 2. The compressed air filter device according to claim 1, wherein the particulate sensor and the substrate are connected by a lead wire that is inserted through the insertion hole in a sealed state.

3. 3. The compressed air filter device according to claim 2, wherein the substrate has a warning section that issues a warning based on the signal.

4. 4. The compressed air filter device according to claim 1, wherein the substrate has a communication section capable of communicating information based on the signal.

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