JP2006263448A - Adsorption cylinder for oxygen enricher, and oxygen enricher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that the conventional one of adsorption cylinders, incorporated in a pressure variable adsorption type oxygen enricher present as a device for feeding oxygen of a high condensation to a patient by being filled with an adsorbing agent which preferentially adsorbs nitrogen in the air, fixes a lid body being fitted in a cylindrical member by the clamping of a bolt or the like, and therefore, has a complicated structure and requires much labor for the assembly. <P>SOLUTION: This adsorption cylinder 27 is equipped with the cylindrical member 101 having an opening section 133 in the axial direction, and the lid body 117 which closes the opening section 133 by being fitted in the opening section 133. In the adsorption cylinder 27, a regulating member (fastening ring 141) which comes into contact with the surface of the lid body 117 on the outside in the axial direction of the lid body 117 is provided. At the same time, the regulating member 141 regulates the movement of the lid body 117 to the outside by being fastened to the inner peripheral surface of the cylindrical member 101 when expanding by being urged in the diametrical direction of the cylindrical member 101. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an oxygen concentrator for supplying high concentration oxygen to a patient or the like and an adsorption tube for an oxygen concentrator used in the oxygen concentrator.

Conventionally, there is an oxygen concentrator as a device for supplying high-concentration oxygen, and such an oxygen concentrator is used for home oxygen therapy for patients suffering from respiratory diseases, for example.
Examples of the oxygen concentrator include a membrane oxygen concentrator using a selective oxygen permeable membrane and an adsorption oxygen concentrator that selectively adsorbs nitrogen. As the adsorption oxygen concentrator, a pressure fluctuation adsorption type using a compressor is used. Things are known.

  The pressure fluctuation adsorption type oxygen concentrator concentrates oxygen using an adsorbent that preferentially adsorbs nitrogen in the air. Specifically, for example, a zeolite-based adsorbent is filled in an adsorption cylinder, air is supplied to the adsorption cylinder and the inside of the cylinder is pressurized, and a depressurization / desorption process for depressurizing the adsorption cylinder to about atmospheric pressure. The regeneration process is repeated alternately. Zeolite-based adsorbents adsorb nitrogen in the air when pressurized and concentrate oxygen, and release and regenerate adsorbed nitrogen when decompressed. By alternately repeating, a product gas containing a high concentration of oxygen (hereinafter referred to as “oxygen-enriched gas”) can be supplied continuously.

Thus, as an adsorption cylinder of the above-described oxygen concentrator, for example, one in which openings on both sides of an aluminum cylindrical member formed by extrusion molding are closed with an aluminum die-cast lid (patent) References 1 and 2).
JP 2001-31404 A (Page 5, FIG. 3) JP-A-2004-560 (page 14, FIG. 8A)

  The conventional adsorption cylinder has a complicated structure because the lid fitted to the cylindrical member is fixed by tightening a plurality of bolts, etc., and the man-hours for manufacturing the cylindrical member and the lid and the assembly of the adsorption cylinder are difficult. There was a problem that was complicated and time-consuming.

  The invention according to claim 1 is an adsorption cylinder for an oxygen concentrator comprising: a cylindrical member having an opening in the axial direction; and a lid that fits inside the opening and closes the opening. A regulating member that comes into contact with the surface of the lid body on the outer side in the axial direction of the cylindrical member, and the regulating member is urged in the radial direction of the cylindrical member to expand, thereby causing an inner circumference of the cylindrical member The gist of the adsorption cylinder for an oxygen concentrator, which is locked to a surface and restricts movement of the lid body to the outside.

  In the present invention, the restricting member is disposed outside the lid (inside the axial direction of the tubular member) fitted into the opening of the tubular member. This restricting member is urged in the radial direction (from the axial center to the inner peripheral surface side) and spreads to engage with the inner peripheral surface of the cylindrical member, so that the lid body moves outward and falls off the opening. Is preventing. That is, when the restricting member is locked to the inner peripheral surface, the lid disposed inside the restricting member is prohibited from moving outward.

As a result, the structure is simpler than that of fixing the lid with a conventional bolt, and there is an effect that man-hours for manufacturing, assembling, and disassembling the suction cylinder can be reduced.
Further, in the present invention, it is possible to press the shaft center side against the urging force of the restricting member so that the restricting member does not engage with the inner peripheral surface of the cylindrical member, so that a tool is not used. Since the lid can be attached and detached, maintenance is easy.
The inside of the adsorption cylinder is filled with, for example, an adsorbent that adsorbs nitrogen from air.

The invention according to claim 2 is characterized in that the regulating member is an elastic member having an outer diameter larger than the inner diameter of the cylindrical member when no external force is applied. The gist is a cylinder.
The present invention exemplifies a regulating member, and the lid can be easily fixed or removed by pressing the elastic member toward the axial center so as not to be locked with the inner peripheral surface. .

The gist of the adsorbing cylinder for an oxygen concentrator according to claim 1 or 2, wherein the regulating member is a ring-shaped member having elasticity.
The present invention exemplifies a regulating member, and by using a ring-shaped member, it is possible to increase the number of engaging portions with the inner circumferential surface of the cylindrical member, so that the regulating member can be reliably attached to the inner circumferential surface. Can be locked to.

The invention according to claim 4 is characterized in that the ring-shaped member is a substantially C-shaped member from which a part of the ring is separated, and the adsorption cylinder for an oxygen concentrator according to claim 3 is summarized. .
The present invention exemplifies a regulating member. By using a substantially C-shaped member, the structure (structure for biasing) of the regulating member can be simplified.

The invention according to claim 5 is a gist of the adsorption cylinder for an oxygen concentrator according to claim 4, wherein a pair of knob portions are provided on the left and right opening end sides of the separation portion of the substantially C-shaped member. And
Accordingly, by pinching the two knob portions so that the distance between them is narrow, it is possible to easily attach and remove the substantially C-shaped regulating member.

The invention according to claim 6 is a gist of the adsorption tube for an oxygen concentrator according to claim 5, further comprising a stopper that is fitted to the both knob portions and restricts movement of the both knob portions. .
Therefore, even if something accidentally hits both knobs, the distance between the knobs is not reduced. Therefore, since the substantially C-shaped regulating member does not drop from the predetermined position (locking position), the lid body does not shift from the predetermined fixed position.

The invention according to claim 7 is the adsorption for oxygen concentrator according to any one of claims 1 to 6, wherein the cylindrical member is a bottomed member having a bottom on the side opposite to the opening. The gist is the cylinder.
The cylindrical member used in the present invention is a bottomed cylindrical member manufactured by, for example, deep drawing. Therefore, the airtightness on the bottom side is excellent, and there is no need to close the bottom side with a lid, so that there is an advantage that the structure can be simplified.

The invention of claim 8 is characterized in that a fitting portion is provided on the inner peripheral surface of the cylindrical member on the opening portion side for fitting and locking the regulating member. The gist is the adsorption tube for an oxygen concentrator according to any one of the above.
In the present invention, the restriction member is locked by fitting the restriction member into the fitting portion on the inner peripheral surface of the cylindrical member. Thereby, locking of a control member is performed reliably.

The invention according to claim 9 is the adsorption for an oxygen concentrator according to claim 8, wherein the fitting portion is a groove provided in an annular shape on the inner peripheral surface of the cylindrical member on the opening side. The gist is the cylinder.
The present invention exemplifies a fitting portion, and here, the regulating member is fitted into the groove on the inner peripheral surface of the cylindrical member, and the position thereof is firmly fixed.

The invention according to claim 10 is characterized in that a large-diameter portion having a larger diameter on the opening side is provided on the opening side of the cylindrical member. The gist of the adsorption cylinder for an oxygen concentrator as described in 1 above.
Accordingly, the lid can be fitted into the large diameter portion. The large-diameter portion can be realized by flaring the opening side or forming a step. Moreover, it can prevent that a control member falls into the inside of a cylindrical member by making the internal diameter inside a bottom part (smaller side) smaller than the outer diameter of a control member.

  The invention according to claim 11 is a cylindrical member having an opening at a cylindrical end, a lid that is fitted in a slidable state at the cylindrical end on the opening side of the cylindrical member, and closes the opening; An oxygen concentrator comprising a regulating member that regulates movement of the body outside the opening, and an urging means that presses the lid against the regulating member, and at least a portion of the lid that contacts the cylindrical member is covered with a buffer material An adsorption cylinder is provided.

  In addition, as described in claim 12, the adsorption material for an oxygen concentrator according to claim 1, wherein the buffer material is at least one of foam, rubber, ABS resin, epoxy resin, and fluororesin.

The gist of an invention of a thirteenth aspect is an oxygen concentrator comprising the adsorption tube for an oxygen concentrator according to any one of the first to twelfth aspects.
In the present invention, an oxygen concentrator using the above-described adsorption cylinder is illustrated.

  The oxygen concentrator includes, for example, at least one adsorption cylinder filled with an adsorbent that preferentially adsorbs nitrogen over oxygen, air supply means for compressing and supplying air to the adsorption cylinder, The pressure fluctuation adsorption type oxygen concentrator that generates the oxygen concentrated gas from the air can be employed.

  The effects of the inventions of claims 1 to 10 are as described above.

In the oxygen concentrator adsorption cylinder according to claim 11, since the attachment of the lid to the cylindrical member is completed only by pressing the lid against the regulating member by the urging means, the production of the adsorption cylinder is efficiently performed at low cost. There is an effect that can be done.
On the other hand, the present applicant notices an adsorption cylinder having the same configuration as that of the present invention except that the lid is not covered with a cushioning material in a quiet room at midnight when the oxygen concentrator equipped with the adsorption cylinder is operated. Although it was a low level that I couldn't notice, I confirmed a faint noise that might cause the user to feel stress. And as a result of searching for the cause of the abnormal noise, the lid may be moved slightly by repeated pressurization and decompression when concentrating oxygen as a result of simplifying the fixing of the lid to the cylindrical member as described above. There was a conclusion that a slight rubbing between the metal lid and the cylindrical member appeared as an abnormal noise. Based on this knowledge, as a result of covering at least a portion of the lid that is in contact with the cylindrical member with a cushioning material, the effect of drastically reducing the abnormal noise was obtained.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a block diagram showing an outline of the oxygen concentrator, FIG. 2 is a schematic cross-sectional view showing the inside of the oxygen concentrator from the side, and FIG. 3 is a schematic cross-sectional view showing the inside of the oxygen concentrator from the back. 4 is a cross-sectional view showing a cylindrical member of the suction cylinder, FIG. 5 is an enlarged cross-sectional view of the main part of the suction cylinder, FIG. 6 is a plan view of the suction cylinder, and FIG. 7 is a partially cutaway perspective view showing the lid of the suction cylinder. 8 (a) is a plan view showing the lid of the suction cylinder, FIG. 8 (b) is the front view, FIG. 8 (c) is the bottom view, and FIG. 8 (d) is A- FIG. 9A is a plan view showing a locking ring, FIG. 9B is a front view thereof, and FIG. 9C is a side view thereof.

  As shown in FIG. 1, the oxygen concentrator 1 is configured by disposing each member for oxygen concentration as shown below in a box-shaped housing 2.

  That is, the oxygen concentrator 1 is connected to the dust filter 13, the finer intake filter 15 than the dust filter 13, and the intake filter 15 from the upstream side along the air flow path from the oxygen inlet 11 through which air is introduced from the outside. An air intake chamber 16 that communicates with the compressor 17 (air supply means) that compresses air is provided, and a pair of cooling fans 19 and 21 that cool the compressor 17 are disposed in the vicinity of the compressor 17.

Downstream of the compressor 17, for example, a pair of adsorption cylinders 27 and 29 (hereinafter also referred to as a first adsorption cylinder and a second adsorption cylinder) filled with a zeolite-based adsorbent that adsorbs nitrogen and the first supply valve 23. The second supply valve 25 is connected. Further, a first exhaust valve 39 and a flow path 35, 37 (hereinafter also referred to as a branch flow path) branched from the flow paths 31, 33 between the supply valves 23, 25 and the adsorption cylinders 27, 29 are provided. A second exhaust valve 41 is provided, and is connected to an exhaust passage 43 for exhausting nitrogen. A silencer 45 is provided at the end of the exhaust passage 43.
The first supply valve 23, the second supply valve 25, the first exhaust valve 39, and the second exhaust valve 41 constitute a pressure increase / decrease switching means.

  On the downstream side of the pair of adsorption cylinders 27, 29, a communication path 47 that connects between the adsorption cylinders 27, 29, and a two-way valve that is provided in the communication path 47 and adjusts the pressure between the adsorption cylinders 27, 29. (Purge valve) 49, orifices 51 and 53 having the same diameter provided at both ends of the two-way valve 49, and a pair of check valves 55 and 57 for preventing the backflow of the oxygen-enriched gas are provided. Further, on the further downstream side where the flow paths merge, a product tank 59 for storing the oxygen-enriched gas, a pressure regulator (regulator) 61 for adjusting the pressure of the oxygen-enriched gas, and the flow rate of the oxygen-enriched gas are set. A flow rate setting device 63, a humidifier 64 for making the dried oxygen-enriched gas suitable humidity, and an oxygen outlet 65 for supplying the oxygen-enriched gas to the outside are provided.

  Next, a specific configuration inside the housing 2 of the oxygen concentrator 1 will be described. As shown in FIG. 2, the inside of the housing 2 is roughly divided into a front partition K1, a rear partition K2, and a lower partition K3 by wooden partition walls 69 and 69 excellent in sound absorption.

  Of these, the suction cylinders 27 and 29 are mainly arranged in the front section K1. The rear section K2 is covered with a metal inner case 71 as shown in FIG. 3, and a sheet metal chamber 67 is formed by the inner case 71. The sheet metal chamber 67 is further divided into an upper chamber 73 and a lower chamber 75 by a horizontal partition plate 72.

  The upper chamber 73 includes an intake filter 15, an intake chamber 16 that communicates with the intake filter 15, a first air pipe 79 that supplies the air in the intake chamber 16 to the compressor 17, and a compressed cylinder from the compressor 17 that absorbs compressed air. A second air pipe 81 for supplying the air to 27 and 29 and the cooling fans 19 and 21 for cooling the compressor 17 are provided.

  On the other hand, the compressor 17 is disposed in the lower chamber 75. The left and right heads 83 and 85 of the compressor 17 are connected to branch air pipes 87 and 89 (for supplying air to the compressor 17) branched from the first air pipe 79 to the left and right. Branched air pipes 91 and 93 branched from the air pipe 81 to the left and right (for supplying compressed air to the adsorption cylinders 27 and 29) are connected.

[Basic operation of oxygen concentrator 1]
The oxygen concentrator 1 basically performs oxygen concentration and regeneration of the adsorbent by alternately repeating pressurization and pressure reduction in the first adsorption cylinder 27 and the second adsorption cylinder 29.

For example, with respect to the first adsorption cylinder 27, the first supply valve 23 is opened and the first exhaust valve 39 is closed, compressed air is sent to the first adsorption cylinder 27 by the compressor 17, and nitrogen is adsorbed by the adsorbent so that oxygen is absorbed. Concentrate (pressure / adsorption process).
On the other hand, with respect to the second adsorption cylinder 29, the second supply valve 25 is closed and the second exhaust valve 41 is opened, and the second adsorption cylinder 27 is connected to the atmosphere side to reduce the pressure (decompression / regeneration process). Release the adsorbed nitrogen and discharge it to the outside.

The pressurization / adsorption process and the decompression / regeneration process are alternately switched at predetermined time intervals in the adsorption cylinders 27 and 29.
In this way, only the oxygen is extracted by the first and second adsorption cylinders 27 and 29 at the time of pressurization, and the oxygen concentrated gas is supplied to the downstream product tank 59, the pressure regulator 61, the flow rate setting device 63, and the humidifier. 64, supplied to the outside (and thus to the patient) via the oxygen outlet 65.

[Adsorption cylinder configuration]
Next, the details of the structure of the suction cylinders 27 and 29 will be described. Since both the suction cylinders 27 and 29 have the same structure, only one suction cylinder 27 will be described here.

  As shown in FIG. 4, the adsorption cylinder 27 is generally configured by a cylindrical member 101 having a bottomed cylindrical shape having an opening 133 at the cylinder end, and a lid 117 that closes the opening 133 of the cylindrical member 101. .

[Adsorption cylinder-cylindrical member]
The cylindrical member 101 is formed by deep drawing aluminum and processing it into a bottomed cylindrical shape having a diameter of about 75 mm and a length of about 355 mm, for example, and is formed of a perforated plate so that the inside thereof has air permeability. It is divided into a first chamber 109, a second chamber 111, a third chamber 113, and a fourth chamber 115 from above by three partition plates 103, 105, and 107. Among these, the first chamber is a mounting region for the lid 117, the second chamber 111 is a filling region for a desiccant (not shown), and the third chamber 113 is a filling region for a zeolite adsorbent (not shown). As shown in FIG. 4, a through hole 121 is provided in the bottom 119 of the cylindrical member 101, and an elbow joint 136 that discharges oxygen-enriched gas to the product tank 59 is attached to the through hole 121. .

  The upper side wall 123 constituting the outer periphery of the first chamber 109 has a larger diameter than the lower side wall (filling part side wall 125), and a stepped part 127 is formed at the boundary between the upper side wall 123 and the filling part side wall 125. Is provided.

  The upper side wall 123 is provided with a curved portion 129 that is bent inwardly with an inner concave portion around the opening 133 (and thus in an annular shape), and the inner concave portion of the curved portion 129 has a semicircular cross section. An annular groove 131 is formed. A locking ring 141 (details of which will be described later) is fitted in the annular groove 131 as a regulating member that regulates the movement of the lid 117 to the outside of the opening 133.

[Adsorption cylinder-lid]
The opening 133 of the upper side wall 123 is closed by a lid 117 as shown in FIG. The lid body 117 is a substantially disk-shaped member made of aluminum die cast, and an elbow joint 135 is screwed into a female screw hole 143 penetrating in the center thereof. The lid 117 has a shallow inverted cup shape, and a lateral groove-like recess 149 is formed on the outer periphery of the body, and a rubber O-ring 139 fitted in the recess 149 closely contacts the upper side wall 123. Thus, the opening 133 is kept airtight.

  The lid 117 is slidable in the axial direction with respect to the cylindrical member 101 and is urged upward by a spring 137 provided between the lower surface thereof and the partition plate 103, and the locking ring is urged by the urging force. 141 is pressed.

  On the other hand, a restricting portion 145 that protrudes upward is provided on the periphery of the upper surface of the lid 117 as shown in FIGS. The restricting portion 145 is for preventing the diameter of the locking ring 141 from being reduced (squeezed) toward the center of the shaft. For this reason, the locking ring 141 is pushed up from below on the outer periphery of the restricting portion 145. An inclined chamfered portion 147 is formed to increase the diameter.

  The body portion excluding the concave portion 149 of the lid 117 and the surface of the restricting portion 145 are covered with a cushioning material 118. The buffer material 118 is formed by applying a fluororesin (tetrafluoroethylene resin). The buffer material 118 can also be formed by laminating any one or more of fluororesin, foam, rubber, ABS resin, and epoxy resin other than those described above, and is basically more elastic than the cylindrical member 101. As long as the material is rich in material. Further, the place covered with the buffer material 118 may be at least a portion in contact with the cylindrical member 101 (the locking ring 141 also constitutes a part of the cylindrical member 101), but of course the entire lid 117 is buffered. You may coat | cover with the material 118. FIG.

[Adsorption cylinder-locking ring]
As shown in FIG. 9, the locking ring 141 is made of an iron wire having elasticity, and has a substantially C shape with one end of the ring open. The locking ring 141 is provided with a pair of left and right protrusions 151 and 153 from both ends on the opening side toward the center, and both protrusions 151 and 153 are provided at the ends of the protrusions 151 and 153. Knob portions 155 and 157 are erected vertically.

  The outer diameter of the locking ring 141 is set to be larger (for example, 80 mm) than the inner diameter (for example, 75 mm) of the upper side wall 123 of the cylindrical member 101 when no external force is applied. Further, as shown in FIG. 9C, the locking ring 141 is formed so as to be slightly shifted up and down so as to function as a spring in the vertical direction.

  As shown in FIG. 6, stoppers 159 for preventing diameter reduction are fitted to both knob portions 155 and 157. The stopper 159 is a plate having a thickness approximately half the height of the knob portions 155, 157, and a plurality of through holes 161, 161... Are selectable according to the size of the stopper 159. The knob portions 155 and 157 are fitted into the two positions of the through-hole 161 so that the movement of the knob portions 155 and 157, that is, the diameter of the locking ring 141 is restricted. As a result, the locking ring 141 does not come off the annular groove 131.

[Adsorption cylinder-mounting method of lid]
Next, a method for attaching the lid 117 to the suction cylinder 27 will be described. First, the third chamber 113 of the cylindrical member 101 is filled with a zeolite adsorbent and the partition plate 105 is mounted, and then the second chamber 111 is filled with a desiccant and the partition plate 103 is mounted. Then, a spring 137 is installed on the partition plate 103, and a lid 117 with an O-ring 139 is fitted into the opening 133. The lid 117 is slidable with respect to the cylindrical member 101 and can be pushed into the back while the spring 137 is compressed. Note that the lid 117 is substantially the same as the inner diameter of the upper side wall 123 of the first chamber 109, and therefore does not enter the back of the stepped portion 127.

  Next, in a state where the lid body 117 is pushed in, the diameter is reduced by sandwiching both knob portions 155 and 157 of the locking ring 141, the locking ring 141 is placed on the lid body 117, and then the knob portions 155 and 157. To release. As a result, the diameter of the locking ring 141 is expanded and fitted into the annular groove 131 of the cylindrical member 101. When the pressing of the lid 117 is released in this state, the lid 117 is lifted by the urging of the spring 137, hits the locking ring 141 and stops.

  As described above, the upper periphery of the lid 117 has the restricting portion 145 protruding upward as shown in FIGS. 7 and 8, and the chamfered portion 147 of the restricting portion 145 is provided on the locking ring 141. The locking ring 141 and the lid 117 are stabilized with each other because they are fitted below.

  Finally, if the stopper 159 is fitted to the knob portions 155 and 157 of the locking ring 141 to lock the locking ring 141, even if something hits the knob portions 155 and 157, the locking ring 141 is inadvertently moved. I can't come off.

[How to remove the suction cylinder and lid]
When removing the lid 117, the above procedure may be followed in reverse.

  As described above, the suction cylinder 27 of the present embodiment has a substantially C-shaped lid member 117 fitted into the cylindrical end of the cylindrical member 101 on the opening 133 side, and an elastic member on the upper surface of the lid body 117. A locking ring 141 is arranged, and the locking ring 141 spreads in the radial direction by its urging force and is fitted in the annular groove 131. As a result, even if the lid body 117 is pressed outward in the axial direction by the spring 137 (and the internal atmospheric pressure rises), the lid body 117 is not pushed up and dropped off.

  In addition, since the cylindrical member 101 is a bottomed cylindrical member manufactured by deep drawing, it has excellent airtightness on the bottom 119 side, and it is not necessary to close the bottom 119 side with another lid so that the structure is It can be simplified.

As mentioned above, although this invention was described about embodiment, of course this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can implement in a various aspect.
For example, in the embodiment, the locking ring 141 is used as a restricting member that restricts the movement of the lid 117 to the outside of the opening 133. However, as shown in FIG. 10, the opening 133 of the tubular member 101 is narrowed inward. An annular convex portion 142 may be formed. Further, the locking ring 141 is not limited to the substantially C shape shown in the figure, and a wire-like member having a polygonal elasticity or a structure in which the left and right arms are extended by a spring can be employed.

  The entire lid 117 of the adsorption cylinders 27 and 29 is covered with a buffer material 118 made of a fluororesin (tetrafluoroethylene resin: JIS K-6894, pencil hardness H or higher by pencil scratch value handwriting method). Was incorporated into the oxygen concentrator 1 to measure abnormal noise (noise) during operation. A plurality of types of buffer material 118 were prepared within a range of about 20 to 100 μm. Abnormal noise was measured in a soundproof room with a background noise of about 21.0 dB (A). For comparison, the same measurement was performed with an oxygen concentrator in which a lid not covered with a buffer material was attached to the adsorption cylinder and the adsorption cylinder was incorporated. The result is shown in the graph of FIG.

  According to the graph of FIG. 11, effective noise reduction was confirmed for the product of the present invention in which the lid 117 was covered with the buffer material 118.

It is a block diagram which shows the outline of an oxygen concentrator. It is a schematic sectional drawing which shows the inside of an oxygen concentrator from the side. It is a schematic sectional drawing which shows the inside of an oxygen concentrator from the back. It is sectional drawing which shows the cylindrical member of an adsorption | suction cylinder. It is a principal part expanded sectional view of an adsorption cylinder. It is a top view of an adsorption cylinder. It is a partially notched perspective view which shows the cover body of an adsorption | suction cylinder. The cover of an adsorption | suction cylinder is shown, (a) is a top view, (b) is a front view, (c) is a bottom view, (d) is AA sectional drawing of (a). The locking ring is shown, (a) is a plan view, (b) is a front view, and (c) is a side view. It is a principal part expanded sectional view which shows the other form of an adsorption | suction cylinder. It is a graph which shows the measurement result of unusual noise.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Oxygen concentrator 27, 29 ... Adsorption cylinder 101 ... Cylindrical member 117 ... Lid body 118 ... Buffer material 119 ... Bottom part 141 ... Locking ring (regulation member)
142 ... annular projection (regulating member)
131 ... annular groove (fitting part)
133 ... opening 137 ... spring (biasing means)
155 ... Knob portion 157 ... Knob portion 159 ... Stopper

Claims (13)

In an adsorption cylinder for an oxygen concentrator, comprising: a cylindrical member having an opening in the axial direction; and a lid that fits inside the opening and closes the opening.
A regulating member that contacts the surface of the lid on the outside of the lid in the axial direction;
The restricting member is engaged with the inner peripheral surface of the tubular member by being energized and spread in the radial direction of the tubular member, and restricts movement of the lid body to the outside. Adsorption cylinder for oxygen concentrator.   2. The adsorption cylinder for an oxygen concentrator according to claim 1, wherein the regulating member is an elastic member having an outer diameter larger than an inner diameter of the cylindrical member when no external force is applied.   3. The adsorption tube for an oxygen concentrator according to claim 1, wherein the regulating member is a ring-shaped member having elasticity.   The adsorption cylinder for an oxygen concentrator according to claim 3, wherein the ring-shaped member is a substantially C-shaped member from which a part of the ring is separated.   The adsorption cylinder for an oxygen concentrator according to claim 4, further comprising a pair of knob portions on left and right opening end sides of the separation portion of the substantially C-shaped member.   6. The adsorption tube for an oxygen concentrator according to claim 5, further comprising a stopper that is fitted to the both knob portions and restricts movement of the both knob portions.   The said cylindrical member is a bottomed member which has a bottom part on the opposite side to the said opening part, The adsorption cylinder for oxygen concentrators of any one of Claims 1-6 characterized by the above-mentioned.   The fitting part for which the said regulating member fits and latches on the inner peripheral surface at the side of the said opening part of the said cylindrical member was provided in any one of Claims 1-7 characterized by the above-mentioned. The adsorption cylinder for an oxygen concentrator as described.   9. The adsorption tube for an oxygen concentrator according to claim 8, wherein the fitting portion is a groove provided in an annular shape on an inner peripheral surface of the cylindrical member on the opening side.   The oxygen concentrator adsorption according to any one of claims 1 to 9, wherein a large-diameter portion having a larger diameter on the opening side is provided on the opening side of the cylindrical member. Tube. A tubular member having an opening at the end of the tube;
A lid that fits in a slidable state at the cylindrical end on the opening side of the cylindrical member and closes the opening;
A regulating member that regulates the movement of the lid body outside the opening,
Urging means for pressing the lid against the regulating member,
An adsorption cylinder for an oxygen concentrator in which at least a portion of the lid that contacts the cylindrical member is covered with a buffer material.   The adsorption cylinder for an oxygen concentrator according to claim 11, wherein the buffer material is at least one of foam, rubber, ABS resin, epoxy resin, and fluororesin.   An oxygen concentrator comprising the adsorption tube for an oxygen concentrator according to any one of claims 1 to 12.

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