Compressed air supply system for air-supplied diving

Abstract

This aims to improve the unfavorable environment in the "underwater hookah method," where divers dive in seawater or lake water while under water pressure, by preventing foreign matter (especially microscopic water droplets) from entering the diver's regulator via the air supply line. [Solution] A compressed air supply system for air-supplied diving, comprising: a compressed air supply source installed on the upper surface of a ship or port structure via a first trolley; a moisture capture device having a moisture capture member that removes moisture contained in the compressed air supplied from the compressed air supply source; a flexible first supply hose mainly located on the upper surface of the structure, with one end connected to the compressed air supply source and passing through the moisture capture device; and a flexible second supply hose connected to the other end of the first supply hose and the suction part on the diver's side, and mainly located underwater, wherein the length of the first supply hose is approximately the same as or longer than that of the second supply hose.

Description

Technical Field

[0001] The present invention relates to a compressed air supply system for air-fed diving that utilizes ship and port structures.

Background Art

[0002] In the atmosphere, invisible moisture (humidity), dust, and bacteria (referred to herein as "microscopic foreign substances") are floating. It is known that the moisture of microscopic foreign substances generally becomes humidity when the air temperature drops, and changes to rain at positive temperatures, snow, ice, etc. at negative temperatures.

[0003] Now, when an air compressor sucks in moisture (humidity) in the atmosphere, the sucked-in moisture changes to high-temperature moisture (humidity) in proportion to the pressure. Also, the onshore supply hose (referred to herein as the "first supply hose") that constitutes the air supply system (line) disposed on the upper surface of a ship or port structure is affected by the atmospheric temperature, while the seawater-side supply hose (referred to herein as the "second supply hose") is affected by the seawater temperature.

[0004] By the way, when the compressed air pumped from an air compressor flows through the first supply hose, since the supply hose is exposed to the outside air temperature as described above, it is gradually cooled by the temperature of the peripheral wall portion of the first supply hose, and the humidity of the microscopic foreign substances becomes water combined therewith. At that time, because the compressed air has pressure, the combined water blows away toward the tip of the supply hose, and a so-called scattered state continuously occurs. Therefore, the moisture contained in the compressed air flows toward the tip end side of the hose corresponding to the fluid pumping force and the length of the onshore supply hose.

[0005] Therefore, depending on the local climate, if the seawater temperature is, for example, 18 to 20 degrees Celsius, the moisture from microscopic foreign matter can be condensed in the longest possible first supply hose, and then passed through a moisture capture device (gas-liquid separator), thereby capturing sufficient moisture. Furthermore, if any minute residual water vapor that could not be captured by the moisture capture device is condensed on the inner wall of the relatively long second supply hose, it will not flow into the diver's mouth.

[0006] In addition, in the summer, the land temperature and sea temperature may be reversed, but the inventors have investigated the lengths of the first supply hose on the land side and the second supply hose on the sea side, the ratio of the two, and the intervention of multiple or one moisture capture devices, and as a result, have been able to sufficiently resolve the problem of humidity (moisture) of microscopic foreign matter flowing through the air supply line (findings). The present invention is based on the inventors' findings.

[0007] First, Patent Document 1 describes a system for producing and supplying nitrogen-oxygen mixed gas for air-supplied diving, which uses an air compressor, a mixed gas production machine connected to the air compressor, and a supply hose (hookah hose) on the sea side to supply a good mixed gas (oxygen) to the diver.

[0008] However, Patent Document 1 does not describe the inventor's findings mentioned above. Therefore, the technology described in Patent Document 1 may allow "at least microscopic foreign moisture" to enter the suction part on the diver's side.

[0009] Next, Patent Document 2 is an example of a "moisture capture device (gas-liquid separation device)" proposed by the inventor. This moisture capture device is characterized by having a moisture capture member in a container that removes moisture contained in compressed air in the air supply line. The inventor has conducted various studies on the applications of this moisture capture device, and the present invention is one of them. Patent Document 3 describes an aerial pump using multiple pumps. This Patent Document 3 also does not contain the inventor's knowledge mentioned above. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Japanese Patent Publication No. 2002-68081 [Patent Document 2] Patent No. 7570730 [Patent Document 3] Japanese Patent Application Publication No. 2018-35761 [Overview of the project] [Problems that the invention aims to solve]

[0011] The object of the present invention is to improve the unfavorable environment in the "underwater hookah method," in which divers dive in seawater or lake water while subjected to water pressure, where foreign matter (especially microscopic water droplets) flows into the suction section on the diver's side via the supply hose of the air supply system. In some embodiments, pulsation-free compressed air is supplied to the suction section on the diver's side. In other embodiments, oil components, odors, etc., contained in the compressed air being supplied are removed. [Means for solving the problem]

[0012] The present invention relates to a compressed air supply system for diving, comprising a compressed air supply source installed on a ship or port structure, and a system for supplying compressed air pressurized from the compressed air supply source to a suction port on the side of a diver working underwater, wherein a moisture capture device having a moisture capture member for removing moisture contained in the compressed air pressurized from the compressed air supply source is provided in the middle of the supply hose of the air system.

[0013] A compressed air supply system for air-supplied diving, characterized in that the supply hose of the air supply system is provided with a pressure fluctuation adjustment means for adjusting the pressure fluctuations of the compressed air after moisture has been removed by a moisture capture device to a pulsation-free state. In the above configuration, the length of the first supply hose of the air supply system connecting the pressure fluctuation adjustment means and the compressed air supply source is approximately equal to or greater than that of the second supply hose of the air supply system connecting the pressure fluctuation adjustment means and the suction part on the diver's side, with respect to the pressure fluctuation adjustment means.

[0014] Furthermore, the compressed air supply system for air-supplied diving according to the present invention is characterized in that, in the above configuration, the supply hose of the air supply system is provided with either a first filter member that removes oil contained in the compressed air, or a second filter member that removes odors contained in the compressed air.

[0015] In the above configuration, it is preferable to position the compressed air supply source on the upper surface of the structure via a mobile trolley. Using a mobile trolley allows for easy repositioning of the compressed air supply source in response to the movement of divers, thereby improving work efficiency and mobility.

[0016] Furthermore, even if the term "pressure fluctuation adjustment means" were replaced with the term "filter device," if the filter device has the function of adjusting the waveform of compressed air to be pulsation-free, then the filter device would still be considered a pressure fluctuation adjustment means. [Effects of the Invention]

[0017] This invention can improve the unfavorable environment in "underwater hookah diving," where divers dive in seawater or lake water while under water pressure, where foreign matter (especially microscopic water droplets) enters the diver's regulator via the air supply line. In some embodiments, it is also possible to supply pulsation-free compressed air to the diver, thereby reducing the respiratory burden on the diver. [Brief explanation of the drawing]

[0018] Figs. 1 to 7 are explanatory diagrams showing the first embodiment of the present invention. Figs. 8 to 13 are explanatory diagrams showing other embodiments of the present invention. [Figure 1] Schematic explanatory diagram showing the whole of the first embodiment. [Figure 2] Perspective view of a fixture for tightening the connection end of a supply hose. [Figure 3] Schematic explanatory diagram showing a state where the connection ends of the first supply hose 4 and the second supply hose 5 are tightened. [Figure 4] Schematic explanatory diagram showing a moisture replenishing device (gas-liquid separation device). [Figure 5] Schematic explanatory diagram showing the main part (container) of Fig. 4. [Figure 6] Exploded explanatory diagram of a moisture capturing member in a container. [Figure 7] Perspective view of a cylindrical support 25b and a gas-liquid separation disk 25c. [Figure 8] Schematic explanatory diagram showing the whole of the second embodiment (pressure fluctuation adjusting means added). [Figure 9] Schematic explanatory diagram of the structure of the pressure fluctuation adjusting means. [Figure 10] Explanatory diagram showing that a first filter member is interposed in the second embodiment (third embodiment). [Figure 11] Schematic explanatory diagram of the first filter member. [Figure 12] Explanatory diagram showing that a plurality of filter members are interposed in the second embodiment (fourth embodiment). [Figure 13] Explanatory diagram showing the connection between a second filter member (tank-type filter member) on the diver side and a regulator.

Embodiments for Carrying out the Invention

[0019] Fig. 1 is a schematic explanatory diagram of a compressed air supply system X for air-fed diving (hereinafter referred to as "system X"). In this system X, a worker (hereinafter referred to as "diver A") wearing a diving suit including a mask (including a diving wet suit) dives into water B such as seawater or lake water for work such as underwater construction, underwater investigation, underwater exploration, etc., and diver A moves within water B. In Figure 1, underwater B is seawater. Therefore, the structure C in this embodiment is a quay and breakwater that demarcates a harbor. Although not specifically shown, structure C of course also includes a workboat. On the seabed, there are numerous concrete blocks D, for example, that support tetrapods (not shown). These concrete blocks D are inspected by diver A, for example. At this time, clean, moisture-free air is continuously supplied from a compressed air supply source 1 located on the upper surface E of structure C to the suction unit (e.g., regulator) 51 of diver A.

[0020] In this embodiment, the compressed air supply source 1 is an air compressor incorporating a safety valve 2. This air compressor 1 is preferably mounted on a first trolley (traveling trolley) 3. By using the traveling trolley 3, the position of the air compressor 1 can follow the movement of diver A, thereby improving work efficiency and mobility.

[0021] The trolley 3 has running wheels 3b provided at the four corners of the horizontal support base 3a, and a handle 3c provided at one end of the horizontal support base 3a. Incidentally, the traveling carriage 3 may be, for example, the cargo bed of an automobile traveling on the upper surface E of structure C. Also, although not specifically shown in the figures, a mixed gas production machine that takes in air from the atmosphere and continuously produces optimal oxygen, while also discharging nitrogen into the atmosphere, may be connected to the air compressor 1 (for example, the technology described in Patent Document 1).

[0022] One of the distinctive features of the present invention is the length of the first supply hose 4 on the structure side and the second supply hose 5 on the underwater side, which are arranged on the upper surface E of the structure C. Specifically, in Figure 1, 4 is a flexible first supply hose in which one end is connected to the discharge pipe 1a of the compressed air supply source 1 and the other end is connected to the other end of a rigid connecting pipe 6 via a moisture capture device 20. The connecting pipe 6 is a short pipe made of, for example, a rigid synthetic resin, and its length is, for example, 30 centimeters.

[0023] The flexible first supply hose 4 is mainly located on the upper surface E of structure C. Meanwhile, the flexible second supply hose 5 is mainly located underwater. One end of the second supply hose 5 is connected to a rigid connecting pipe 6, while the other end is connected to the suction section 51 on the diver's side.

[0024] Incidentally, since the first supply hose 4 and the second supply hose 5 constitute the air supply system, regardless of their material, flexibility, toughness, thickness, length, or other characteristics, legally, the first supply hose 4 and the second supply hose 5 can be considered as "a single supply hose for the air supply system." For the sake of explanation, here we will distinguish the air supply system into "first supply hose" and "second supply hose" based on the rigid connecting pipe 6 of the first embodiment or the pressure fluctuation adjustment means (device or air storage tank) 31 of the second embodiment. Therefore, the first supply hose 4 extends from the discharge pipe 1a of the compressed air supply source 1 to one end of the connecting pipe 6, provided that the land-side air supply line is not equipped with the pressure fluctuation adjustment means described later, the first filter member for removing oil components, etc. On the other hand, the second supply hose 5 extends from the other end of the connecting pipe 6 to the suction section 51 on the diver's side.

[0025] However, the length of the first supply hose 4 is approximately the same as that of the second supply hose 5, or longer than that of the second supply hose 5. In this embodiment, for example, the length of the first supply hose 4 is 90 meters, while the length of the second supply hose is 80 meters. Note that the lengths of the first supply hose 4 and the second supply hose are not limited to the above values. Furthermore, the first supply hose 4 and the second supply hose are flexible. Preferably, they are made of soft synthetic rubber. The second supply hose is generally referred to as a "hookah hose."

[0026] Furthermore, although not specifically shown, one end of the first supply hose 4 (left side in Figure 1) is fitted into the discharge pipe 1a of the compressed air supply source 1 and secured with one or more fasteners (e.g., clamps) 10 shown in Figure 2. On the other hand, the other end of the first supply hose 4 (right side in Figure 1) is similarly secured with one or more fasteners 10 shown in Figure 2.

[0027] Here, an example of the fastening device 10 will be described with reference to Figure 2. The fastening device 10 employs a ring-shaped clamp. The left and right split links 11a and 11b pivotally attached to the clamp 10 each have a tightening screw rod 11c and an operating locking piece 11d that screws onto the tightening screw rod on one side. When the tightening screw rod 11c is engaged with the free engagement end of the other split link 11a and the operating locking piece 11d is tightened, both ends of the first supply hose 4 are fastened to the outer surfaces of the ends of the discharge pipe 1a and the connecting pipe 6. Note that the fastening device 10 can be any commercially available fastening device. Alternatively, tape, string, wire, etc., may also be used.

[0028] Figure 3 shows the state in which the connecting end of the first supply hose 4 is fitted onto the outer surface of one end of the connecting pipe 6, and the connecting end of the second supply hose 5 is fitted onto the outer surface of the other end of the connecting pipe 6, and the connecting ends of the first supply hose 4 and the second supply hose 5 are tightened with one connecting pipe 6 and at least one or more fasteners 10. Note that there may be multiple fasteners 10 (for example, three). Next, the configuration of the moisture capture device X will be explained with reference to Figures 4 to 7. The portable moisture capture device 20 is installed on the upper surface (including the upper part) E of the structure C, but it is light enough to be carried by a person. Although not specifically shown in the figures, it is preferable that the moisture capture device 20 be mounted on a second carriage similar to the first carriage (traveling carriage 3).

[0029] However, the moisture capture device 20 includes a container 23 having an intake port (intake pipe) 21 on the right side of the drawing and an exhaust port (exhaust pipe) 22 on the left side of the drawing for discharging air after gas-liquid separation, and a moisture capture member 25 provided above the internal space 24 of the container, which allows compressed air to flow from the intake port 21 side to the exhaust port 22 side, and is arranged at least at predetermined intervals in the internal space 24 and captures moisture in the compressed air. In this embodiment, it also includes a support box 26 that houses the lower end of the container. An annular support portion 27 is fixedly provided approximately in the center of the inner circumferential wall of the support box 26. Now, the specific configuration of the moisture capture device 20 will be described.

[0030] (A) The container 23 is a vertically elongated cylindrical container. The cylindrical container 23 consists of a vertically elongated container body 23a with an upper opening, a lid 23b integrally attached to the container body, and an annular fastener 23c that detachably fastens the lid to the container body. Therefore, in this embodiment, the first supply hose 4 is attached to an intake port 21 formed on the peripheral wall of the lid 23b, and the first supply hose 4 is also attached to an exhaust port 22 formed on the peripheral wall of the lid 23b up to a connecting pipe. (B) As shown in Figure 3, the peripheral wall surface of the lower end (bottom side) of the container body 23a is detachably supported by a support base 26 with an opening at the top, and a container-shaped drain 29, shown by a dashed line, is removable inside the support base 26. The lower end of the container body 23a has a bottom wall portion formed in the shape of a mortar, and a drop-off opening is formed in the center of this bottom wall portion. (C) The gas-liquid separation member corresponding to the moisture-capturing member 25 consists of a plurality of partition components, which are integrally incorporated into the internal space of the container 23. Referring to Figures 5 and 6, the moisture-capturing member 25 consists of a first partition body 25a in the shape of a pot with an opening at the bottom, and a gas-liquid separation plate 25c as a second partition body which is integrally attached via a plurality of fasteners to the lower opening of a cylindrical support 25b that is screwed into the upper opening of the first partition body 25a, and which has a plurality of small gas flow rate control holes formed therein.

[0031] In the above configuration, the gas flowing into the downstream gas chamber passes through the narrow vent 30 formed approximately in the center of the lower end of the pot-shaped first partition 25a, and becomes open within the downstream gas chamber 32. As a result, the gas flowing along the inner circumferential surface of the first partition 25a flows slower than the gas flow rising directly above the vent 30. In other words, the gas on the curved surface side of the first partition 25a becomes turbulent in a vortex-like manner, which in turn promotes gas-liquid separation.

[0032] The gas-liquid separation plate 25c, which serves as the second partition, has a plurality of gas impactor protrusions provided on its lower surface. Although not specifically shown, in order to promote gas-liquid separation, the gas impactor protrusions are formed in shapes such as short pins, columns, plates, blocks, curved surfaces, inclined surfaces, wave shapes, sawtooth shapes, or similar shapes. The shape of the first partition 25a, which is shaped like a pot, can be redesigned to be umbrella-shaped, tubular, etc. The moisture-capturing member 25 may also be a container with a large number of partition plates arranged inside a horizontally elongated container. In this embodiment, the gas flow is a known technique and is therefore omitted here.

[0033] Next, the second to fourth embodiments of the present invention will be described with reference to Figures 8 to 13. Note that components identical to those in the first embodiment are denoted by the same reference numerals, and redundant explanations are omitted. First, Figures 8 and 9 show the second embodiment. The main difference between the system X1 of this second embodiment and the first embodiment is that the means for connecting the other end of the first supply hose 4 and the other end of the second supply hose 5 has been replaced with a "pressure fluctuation adjustment means 31".

[0034] In other words, the system X1 of the second embodiment is provided with a pressure fluctuation adjustment means 31 having a plurality of reciprocating pumps 33a, 33b that adjust the pressure fluctuation of the compressed air after moisture has been removed from the first supply hose 4 by the moisture capture device 20 to be pulsating, in addition to the system X of the first embodiment.

[0035] Here, with reference to Figure 9, the main structure of the pressure fluctuation adjustment means 31 will be described. This pressure fluctuation adjustment means 31 uses an arterial reciprocating pump 33 in a container 32 to send arterial compressed air from a common discharge pipe 45 to the second supply hose 5. The technology of the arterial reciprocating pump 33 is described in publications such as Japanese Patent Publication No. 53 (1978)-17762 and Japanese Patent Publication No. 2018-35761, so it will only be briefly described here.

[0036] In Figure 9, an aerial reciprocating pump 33 having a first pump 33a and a second pump 33b is appropriately installed inside the tank-shaped container 32. The container 32 consists of a container body 32a and a lid 32b. The motor 35 is fixed to the center of the upper surface of the lid 32b.

[0037] The dotted line inside the container body 32a represents the frame 36, and a long, rod-shaped rotating shaft 37 connected to the output shaft of the motor 35 is mounted vertically in the center of this frame 36. 38 is a cylindrical rotating cam that is linked to the rotating shaft 37, and a curved, continuous cam groove or engaging projection is formed on its outer surface. Crossheads 39A and 39B are provided on the left and right sides of this rotating cam 38. 40A and 40B are a pair of left and right plungers connected to the rear ends of the crossheads 39A and 39B, respectively. 41A and 41B are a pair of left and right pressure chambers into which the lower ends of the plungers 40A and 40B are inserted. 42A and 42B are a pair of left and right diaphragms. 43A and 43B are a pair of left and right pump chambers. 44 is a common suction pipe, while 45 is a common discharge pipe.

[0038] Let me briefly explain the operation of the pulsation-free reciprocating pump 33. When the motor 35 drives the rotating cam 38 of the pulsation-free reciprocating pump 33, the rotating cam 38 causes the crossheads 39A and 39B to reciprocate with a phase difference of 180 degrees, and compressed air from the left and right pump chambers 43A and 43B is alternately discharged into the common discharge pipe 45, thereby pumping the fluid without pulsation.

[0039] By providing a pressure fluctuation adjustment means 31 with multiple reciprocating pumps 33a and 33b in the line of the first supply hose 4, the pulse pressure of the compressed air after the moisture acquisition device 20 has passed can be stabilized. Therefore, the breathing burden on diver A can be reduced. In addition, housing the non-arterial reciprocating pump 33 inside the container 32 has the advantage of not rusting in saltwater.

[0040] Furthermore, when using the pressure fluctuation adjustment means 31 as a reference, the air supply line from the compressor 1 to the pressure fluctuation adjustment means 31 is the first supply hose 4, while the line from the pressure fluctuation adjustment means 31 to the diver's regulator 51 is the second supply hose (e.g., hookah hose) 5. In addition, the position of the pressure fluctuation adjustment means 31 serves as the reference for the lengths of the first supply hose 4 and the second supply hose 5, respectively.

[0041] By the way, an example of the pressure fluctuation adjustment means 31 described is a pulsation-free reciprocating pump 33 equipped with a motor 35, crossheads 39A and 39B, etc., but it is not necessarily required to use a pulsation-free reciprocating pump 33. For example, in order to reduce the construction cost of the system, one or more storage tanks that keep compressed air pulsation-free may be used. These storage tanks are sold by other companies and are already known or well-known technology, and they have, for example, a suction section, a horizontally elongated air storage section that eliminates the pulsating pressure of compressed air, and a discharge section that discharges pulsation-free air, and generally have the appearance of a horizontal tank. Therefore, a detailed explanation of the specific configuration of the storage tank will be omitted. Although not specifically shown in the figures, the moisture capture device 20 and the pressure fluctuation adjustment means 31 may be mounted together on the second trolley.

[0042] Next, Figures 10 and 11 show a third embodiment. The system X2 of this third embodiment uses the same configuration as the second embodiment, and a first filter member 47 is provided in the line on the first supply hose 4 side to remove trace amounts of oil components contained in the pressurized air. As shown in Figure 11, the first filter member 47 consists of a tank body 47a and a filter 47b made of nonwoven fabric (polypropylene), activated carbon, etc., which is installed inside the tank body 47a.

[0043] Next, Figures 12 and 13 show a fourth embodiment. System X3 in this fourth embodiment also uses the same configuration as the first, second, or third embodiment, and a tank-type second filter member 50 is provided on the second supply hose 5 side to which diver A connects to the regulator 51. Therefore, in Figure 12, the pressure fluctuation adjustment means 31 may be provided directly or indirectly (via a trolley) on the upper surface of the structure.

[0044] The second filter component 50 consists of a tank body 50a and activated carbon 50b installed inside the tank body 50a. This second filter component 50 can be carried on the back of diver A via a strap. Therefore, in this embodiment, the odor of the compressed air flowing through the second supply hose 5 via the pressure fluctuation adjustment means 31 can be removed, and clean air can be sent to diver A.

[0045] <Note> In the third embodiment, the first supply hose 4 is provided with either a first filter member 47 that removes oil contained in the compressed air or a second filter member 50 that removes odors contained in the compressed air. In addition, in the third embodiment, the first supply hose 4 may be provided with both the first filter member 47 and the second filter member 50.

[0046] By the way, the drawings showing the specific configurations of the first filter member 47 and the second filter member 50 are omitted. However, it is preferable that the filters 47b and 50b of these members 47 and 50 be of a cartridge type, consisting of, for example, activated carbon formed in a long cylindrical shape with openings at both ends, a metal annular support part that is fixedly fitted to the upper end of the activated carbon, and a metal annular support part or cap part that is fixedly fitted to the lower end of the activated carbon.

[0047] Therefore, the tank bodies 47a and 50a of these components 47 and 50 consist of a pot-shaped storage section capable of housing the filters 47b and 50b respectively, and a cap section that is removably screwed onto the upper end of the storage section. A suction section is formed at the lower end of the storage section, while a discharge section is formed at the upper end of the cap section. In this case, a spring member is built into the inner wall of the cap section, and when the cap section is screwed onto the storage section, the filters 47b and 50b are pressed downward by the spring force, forming a flow path. Compressed air enters from the outer circumference to the inner circumference (radially inward) of the filters 47b and 50b and flows through the flow path to the discharge section.

[0048] With this configuration, microscopic foreign matter such as oil components and odors in the compressed air can be sufficiently captured, and when necessary, the filters 50b and 47b can be removed from the storage compartment and easily cleaned with a brush. [Industrial applicability]

[0049] This invention can be used in the field of compressed air supply systems for air-supplied diving that utilize ships and port structures. [Explanation of Symbols]

[0050] X, X1, X2, X3... System (device), A... Diver, B... Underwater C...Structure, D...concrete block, E... Top surface of the structure, 1... Compressed air supply source, 3…First bogie (running bogie), 4…First supply hose, 5…Second supply hose, 6…Connecting pipe, 10... Fasteners, 20…Moisture replenishment device, 23...container, 25…Moisture-absorbing member, 26...support stand, 31... Pressure fluctuation adjustment means, 32... Tank-shaped container, 33... Pulsation-free reciprocating pump, 33a...First reciprocating pump, 33b...Second reciprocating pump, 35...motor, 45... Common discharge pipe, 47...First filter component, 50...Second filter component, 51... Regulator.

Claims

1. A compressed air supply system for diving, comprising a compressed air supply source installed on a ship or port structure, and a supply hose of an air supply system that supplies compressed air pressurized from the compressed air supply source to a suction part on the side of a diver working underwater, wherein a moisture capture device having a moisture capture member for removing moisture contained in the compressed air pressurized from the compressed air supply source is provided in the middle of the supply hose of the air supply system.

2. In the compressed air supply system for air-supplied diving according to claim 1, A compressed air supply system for air-supplied diving, characterized in that the supply hose of the air supply system is provided with a pressure fluctuation adjustment means for adjusting the pressure fluctuations of the compressed air after moisture has been removed by the moisture removal device to a pulsation-free state.

3. A compressed air supply system for air-supplied diving according to claim 2, characterized in that, with respect to the pressure fluctuation adjustment means, the length of the first supply hose of the air supply system connecting the pressure fluctuation adjustment means and the compressed air supply source is approximately equal to or greater than that of the second supply hose of the air supply system connecting the pressure fluctuation adjustment means and the suction part on the diver's side.

4. A compressed air supply system for air-supplied diving according to any one of claims 1 to 3, characterized in that the supply hose of the air supply system is provided with either a first filter member for removing oil contained in the compressed air, or a second filter member for removing odors contained in the compressed air.

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