Lower end cover assembly for oxygen generator and oxygen generator

Abstract

The utility model relates to the field of oxygen generation, and discloses a lower end cover assembly for an oxygen generator and the oxygen generator. The oxygen generator comprises a first molecular sieve barrel and a second molecular sieve barrel which are arranged side by side, the lower end cover assembly comprises a lower end cover used for being connected to the lower ends of the first molecular sieve barrel and the second molecular sieve barrel, and the lower end cover is provided with a purging air channel and two purging holes communicated with the purging air channel. The two purging holes are respectively communicated with the first molecular sieve barrel and the second molecular sieve barrel. According to the lower end cover assembly, the purging air channel and the purging hole are integrated in the lower end cover, reverse purging of the first molecular sieve barrel and the second molecular sieve barrel can be achieved, and compared with an external hose connection mode adopted in the prior art, the structure can be optimized, operation can be simplified, and nitrogen can be better discharged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oxygen production, and particularly to a lower end cover assembly for an oxygen generator and an oxygen generator comprising the same. BACKGROUND

[0002] Oxygen is an indispensable part of human life activities and metabolism, and the oxygen generator product provides great convenience for people to obtain high-purity oxygen, meeting the needs of users for oxygen therapy. Most of the oxygen generator products on the market currently adopt the principle of pressure swing adsorption (PSA), use zeolite molecular sieve as an adsorbent, and use the molecular sieve to separate nitrogen and oxygen in air under gas pressure to produce high-purity medical oxygen by using the difference in the adsorption capacity of the molecular sieve for nitrogen and oxygen in air under pressure swing adsorption technology PSA at normal temperature and low pressure.

[0003] However, the existing oxygen generator needs to be connected with a hose and embed a throttle valve in the pipe when back purging the molecular sieve, resulting in complicated operation. SUMMARY

[0004] The utility model aims at overcoming the problem of complicated operation of the existing oxygen generator in back purging.

[0005] To achieve the above-mentioned purpose, the utility model provides a lower end cover assembly for an oxygen generator in one aspect, the oxygen generator comprising a first molecular sieve barrel and a second molecular sieve barrel arranged side by side, the lower end cover assembly comprising a lower end cover connected to the lower ends of the first molecular sieve barrel and the second molecular sieve barrel, the lower end cover having a purging air passage and two purging holes communicating with the purging air passage, the two purging holes being used to communicate the first molecular sieve barrel and the second molecular sieve barrel respectively.

[0006] In some embodiments, the lower end cover assembly further comprises two purging components arranged on the communication paths of the two purging holes and the purging air passage respectively.

[0007] In some embodiments, the purging air passage extends in the plane where the lower end cover is located, and the two purging holes are arranged above the purging air passage.

[0008] In some embodiments, the purging component is arranged on the vertical communication path of the purging hole and the purging air passage.

[0009] In some embodiments, the two purging holes are respectively located at the two ends of the purging air passage.

[0010] In some embodiments, the purging air passage is a straight-line channel extending along the length direction of the lower end cover.

[0011] In some embodiments, the purging component is a throttle bridge, and the purging component is disposed adjacent to the purging hole and is sealed from the purging hole by a purging sealing ring.

[0012] In some embodiments, the purging hole is formed on an upper surface of the lower end cover, the purging air passage is recessed on a lower surface of the lower end cover, and the lower end cover assembly further comprises a cover plate covering the lower surface of the lower end cover to seal the purging air passage.

[0013] In some embodiments, the lower end cover further comprises a first oxygen passage, a first oxygen outlet communicating the first oxygen passage with the first molecular sieve barrel, a second oxygen passage, and a second oxygen outlet communicating the second oxygen passage with the second molecular sieve barrel.

[0014] In some embodiments, a passage sealing gasket is disposed between the cover plate and the lower end cover.

[0015] In some embodiments, the first oxygen passage and the second oxygen passage extend in a plane in which the lower end cover is located, the first oxygen outlet is located above the first oxygen passage, and the second oxygen outlet is located above the second oxygen passage.

[0016] In some embodiments, the first oxygen outlet and the second oxygen outlet are formed on an upper surface of the lower end cover, the first oxygen passage and the second oxygen passage are recessed on a lower surface of the lower end cover, and the cover plate seals the first oxygen passage and the second oxygen passage.

[0017] In some embodiments, the lower end cover further comprises two oxygen outlets respectively communicating the first oxygen passage and the second oxygen passage.

[0018] In some embodiments, a groove is formed on a lower surface of the lower end cover and surrounds the purging air passage, the first oxygen passage, and the second oxygen passage, and the passage sealing gasket is embedded in the groove.

[0019] The utility model discloses a lower end cover assembly for an oxygen generator, which comprises a lower end cover, a first molecular sieve barrel, a second molecular sieve barrel, a first oxygen passage, a first oxygen outlet, a second oxygen passage, and a second oxygen outlet.

[0020] In some embodiments, the oxygen generator further comprises a mounting shell, the mounting shell defines a mounting compartment for mounting the first molecular sieve barrel and the second molecular sieve barrel, the mounting compartment has an opening for the first molecular sieve barrel and the second molecular sieve barrel to pass through, and the lower end cover is mounted at the opening.

[0021] In some embodiments, the installation shell is provided with a mounting seat on one side of the opening, and the oxygen generator further comprises an oxygen tank arranged on the mounting seat, and the mounting seat has an oxygen inlet joint through hole for an oxygen inlet joint of the oxygen tank to pass through to insert the oxygen outlet of the lower end cover.

[0022] The lower end cover assembly provided by the utility model can realize back purging of the first and second molecular sieve barrels, can optimize the structure, simplify the operation and be more conducive to nitrogen discharge compared with the external hose mode of the prior art.

[0023] Other features and advantages of the utility model will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. The present application is not limited by the accompanying drawings.

[0025] Figure 1 is an exploded view of one embodiment of the lower end cover assembly in the utility model;

[0026] Figure 2 is Figure 1 a front view of the lower end cover;

[0027] Figure 3 is an exploded view of one embodiment of the oxygen generator in the utility model;

[0028] Figure 4 is a sectional view of one embodiment of the oxygen generator in the utility model;

[0029] Figure 5 is Figure 4 a sectional view of part of the structure of the oxygen generator;

[0030] Figure 6 is a perspective view of one embodiment of the installation shell in the utility model.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 100-oxygen generator, 110-first molecular sieve barrel, 120-second molecular sieve barrel, 130-lower end cover assembly, 131-lower end cover, 1310-positioning column, 1311-purging air channel, 1312-purging hole, 1313-first oxygen passage, 1314-first oxygen outlet, 1315-second oxygen passage, 1316-second oxygen outlet, 1317-oxygen outlet, 1318-groove, 1319-connection hole, 132-purging component, 133-purging sealing ring, 134-cover plate, 135-air channel sealing gasket, 136-lower end cover sealing gasket, 140-mounting shell, 141-mounting compartment, 142-mounting seat, 1421-oxygen inlet connector perforation, 1422-positioning hole, 150-oxygen barrel, 151-oxygen inlet connector, 152-oxygen inlet connector sealing ring, 160-upper end cover, 161-upper end cover sealing gasket, 162-gas inlet nitrogen discharge port sealing ring, 163-gas inlet nitrogen discharge port, 170-control valve, 171-control valve sealing ring, 180-bolt. DETAILED DESCRIPTION

[0033] The embodiments of the present application will be described in further detail below with reference to the drawings. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application, and should not be taken in a limiting sense. The present application can be implemented in numerous ways, including, but not limited to, the particular embodiments described in this document. Rather, any number of variations and modifications can be made to the preferred embodiments described herein without departing from the scope of the present application.

[0034] The present application provides these embodiments in order to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangement of components and steps, the composition of materials, numerical expressions and values set forth in these embodiments should be interpreted as merely exemplary, and not as a limitation.

[0035] It should be noted that, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] In addition, the "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0037] It should also be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. When it is described that a specific device is located between the first device and the second device, there can be an intermediate device between the specific device and the first device or the second device, or there can be no intermediate device.

[0038] All the terms used in the utility model have the same meaning as understood by ordinary skilled persons in the field to which the utility model belongs, unless otherwise specifically defined. It should also be understood that the terms defined in, for example, a general dictionary should be interpreted to have a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or excessively formalized sense, unless explicitly defined here.

[0039] Techniques, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but under appropriate circumstances, the techniques, methods and devices should be considered as part of the specification.

[0040] The utility model provides a kind of lower end cover assembly for oxygen generator on one aspect, referring to Figure 3 Or Figure 4 Oxygen generator 100 includes first molecular sieve barrel 110 and second molecular sieve barrel 120 (i.e. adsorption tower) arranged side by side, referring to Figure 2 、 Figure 4 And Figure 5 Lower end cover assembly 130 includes lower end cover 131 for being connected to the lower end of first molecular sieve barrel 110 and second molecular sieve barrel 120, lower end cover 131 has purge gas channel 1311 and two purge holes 1312 communicated with purge gas channel 1311, two purge holes 1312 are used to be communicated first molecular sieve barrel 110 and second molecular sieve barrel 120 respectively.

[0041] In use, when the first molecular sieve barrel 110 produces oxygen and the second molecular sieve barrel 120 discharges nitrogen, the pressure of the first molecular sieve barrel 110 is higher than that of the second molecular sieve barrel 120, at this time, the gas in the first molecular sieve barrel 110 enters the purge gas channel 1311 through the corresponding purge hole 1312, and then enters the second molecular sieve barrel 120 through another purge hole 1312, thereby realizing the back purging of the second molecular sieve barrel 120 and facilitating the discharge of nitrogen in the second molecular sieve barrel 120. Conversely, when the first molecular sieve barrel 110 discharges nitrogen and the second molecular sieve barrel 120 produces oxygen, the pressure of the second molecular sieve barrel 120 is higher than that of the first molecular sieve barrel 110, at this time, the gas in the second molecular sieve barrel 120 enters the purge gas channel 1311 through the corresponding purge hole 1312, and then enters the first molecular sieve barrel 110 through another purge hole 1312, thereby realizing the back purging of the first molecular sieve barrel 110 and facilitating the discharge of nitrogen in the first molecular sieve barrel 110.

[0042] The lower end cover assembly 130 provided by the utility model can realize the back purging of the first and second molecular sieve barrels by integrating the purge gas channel 1311 and the purge hole 1312 on the lower end cover 131, and compared with the external hose mode adopted by the prior art, the structure can be optimized, the operation can be simplified, and the discharge of nitrogen is more facilitated.

[0043] In some embodiments, the lower end cover assembly 130 can further include two purge components 132 arranged on the communication paths of the two purge holes 1312 and the purge gas channel 1311 respectively. It should be noted that in this embodiment, the hole diameter of the purge hole 1312 can be relatively large due to the presence of the purge component 132. In the embodiment without the purge component 132, the hole diameter of the purge hole 1312 needs to be relatively small to achieve the purging effect.

[0044] The purge component 132 can be any structure capable of increasing the flow rate of the fluid medium and relatively reducing the hydrostatic pressure to generate a pressure difference upstream and downstream of the purge component 132, such as a throttling bridge, a hole plate, etc. Figure 5 As shown, the purge component 132 is a throttling bridge, and the hole diameter of the throttling bridge can be adjusted according to the adsorption parameters of the molecular sieve barrel.

[0045] In the utility model, the purge gas channel 1311 can extend in any form on the lower end cover 131, for example, it can extend on the plane where the lower end cover 131 is located, or it can extend obliquely relative to the plane where the lower end cover is located; it can extend linearly, or it can extend curvilinearly; it can extend inside the lower end cover 131, or it can extend on the surface of the lower end cover 131.

[0046] In some embodiments, referring to Figure 2The purge air passage 1311 extends horizontally on the plane of the lower end cover 131. In this case, two purge holes 1312 can be located above the purge air passage 1311, and the purge component 132 can be located on the vertical communication path between the purge holes 1312 and the purge air passage 1311. This allows for full utilization of the space in the lower end cover 131 and optimizes the layout. The two purge holes 1312 can be located at opposite ends of the purge air passage 1311.

[0047] Furthermore, such as Figure 2 As shown, the purge airway 1311 is a straight channel, and the lower end cover 131 has a rectangular cross-sectional shape. The purge airway 1311 extends along the length of the lower end cover 131, that is, along the arrangement direction of the first molecular sieve barrel 110 and the second molecular sieve barrel 120. Setting the purge airway 1311 as a straight channel can reduce the resistance of the airway to the fluid and reduce the pressure drop of the fluid during the flow process.

[0048] like Figure 5 As shown, the purging component 132 is disposed near the purging hole 1312 and is sealed to the purging hole 1312 by a purging sealing ring 133. A stepped structure is provided on the communication path between the purging hole 1312 and the purging air passage 1311 to accommodate the installation of the purging component 132 and the purging sealing ring 133.

[0049] To facilitate the assembly and disassembly of the purging component 132 and the purging seal ring 133, as well as the cleaning and formation of the purging air passage 1311, preferably, see [reference needed]. Figure 1 , Figure 2 and Figure 5 The purge hole 1312 is formed on the upper surface of the lower end cover 131, and the purge air passage 1311 is recessed on the lower surface of the lower end cover 131. The lower end cover assembly 130 also includes a cover plate 134 that covers the lower surface of the lower end cover 131 to close the purge air passage 1311. In order to ensure the seal between the lower end cover 131 and the cover plate 134 and prevent gas leakage in the purge air passage, an air passage sealing gasket 135 may be provided between the cover plate 134 and the lower end cover 131.

[0050] like Figure 2As shown, the lower end cap 131 also has a first oxygen channel 1313, a first oxygen outlet 1314 connecting the first oxygen channel 1313 and the first molecular sieve barrel 110, a second oxygen channel 1315, and a second oxygen outlet 1316 connecting the second oxygen channel 1315 and the second molecular sieve barrel 120. In use, oxygen produced in the first molecular sieve barrel 110 can be collected by entering the first oxygen channel 1313 through the first oxygen outlet 1314, and oxygen produced in the second molecular sieve barrel 120 can be collected by entering the second oxygen channel 1315 through the second oxygen outlet 1316. Thus, the lower end cap 131 integrates purging and oxygen outlet functions, further simplifying the structure.

[0051] In this invention, the first oxygen channel 1313 and the second oxygen channel 1315 can extend on the lower end cover 131 in any form. For example, they can extend on the plane where the lower end cover 131 is located, or they can extend at an angle relative to the plane where the lower end cover is located; they can extend in a straight line or in a curve; they can extend inside the lower end cover 131 or on the surface of the lower end cover 131.

[0052] In some implementations, see Figure 2 The first oxygen channel 1313 and the second oxygen channel 1315 extend on the plane of the lower end cover 131, that is, the first oxygen channel 1313 and the second oxygen channel 1315 extend horizontally on the lower end cover 131. In this case, the first oxygen outlet 1314 can be located above the first oxygen channel 1313, and the second oxygen outlet 1316 can be located above the second oxygen channel 1315. In this way, the space of the lower end cover 131 can be fully utilized and the layout optimized. The lower end cover 131 may also have two oxygen outlets 1317 that communicate with the first oxygen channel 1313 and the second oxygen channel 1315 respectively. The oxygen outlets 1317 and the first oxygen outlet 1314 / second oxygen outlet 1316 are located at the two ends of the first oxygen channel 1313 / second oxygen channel 1315 respectively.

[0053] Furthermore, such as Figure 2 As shown, the first oxygen channel 1313 is a curved channel, the second oxygen channel 1315 is a straight channel, and the cross-sectional shape of the lower end cover 131 is rectangular. The first oxygen channel 1313 and the second oxygen channel 1315 extend along the length of the lower end cover 131. Both oxygen outlets 1317 are located on the left side of the lower end cover 131. The first oxygen channel 1313 is longer because it needs to be connected to the first molecular sieve barrel 110, which is farther away from the oxygen outlet 1317. The second oxygen channel 1315 is shorter because it is connected to the second molecular sieve barrel 120, which is closer to the oxygen outlet 1317.

[0054] To facilitate the cleaning and formation of the first oxygen channel 1313 and the second oxygen channel 1315, preferably, see [reference needed]. Figure 1 and Figure 2 The first oxygen outlet 1314 and the second oxygen outlet 1316 are formed on the upper surface of the lower end cover 131, and the first oxygen channel 1313 and the second oxygen channel 1315 are recessed on the lower surface of the lower end cover 131.

[0055] When the lower end cover 131 has a purge airway 1311, a first oxygen passage 1313, and a second oxygen passage 1315, the airway sealing gasket 135 is used to simultaneously seal the purge airway 1311, the first oxygen passage 1313, and the second oxygen passage 1315. For example... Figure 2 As shown, the first oxygen channel 1313 is located below the lower end cover 131, and the purge airway 1311 and the second oxygen channel 1315 are located side by side above the lower end cover 131. The total length of the purge airway 1311 and the second oxygen channel 1315 along the length of the lower end cover 131 is approximately the same as the length of the first oxygen channel 1313. Figure 1 As shown, the airway sealing gasket 135 is shaped to fit the overall contour of the purge airway 1311, the first oxygen channel 1313, and the second oxygen channel 1315. The cover plate 134 simultaneously seals the purge airway 1311, the first oxygen channel 1313, and the second oxygen channel 1315. The cover plate 134 is detachably connected to the lower end cover 131.

[0056] like Figure 1 and Figure 2 As shown, a groove 1318 can also be provided on the lower surface of the lower end cover 131, surrounding the purge air passage 1311, the first oxygen passage 1313 and the second oxygen passage 1315, and the air passage sealing gasket 135 is embedded in the groove 1318.

[0057] Another aspect of this utility model provides an oxygen generator, see [link to relevant documentation]. Figures 3-6 The oxygen generator 100 includes a first molecular sieve barrel 110 and a second molecular sieve barrel 120 arranged side by side, and a lower end cap assembly 130 connected to the lower end of the first molecular sieve barrel 110 and the second molecular sieve barrel 120.

[0058] The oxygen generator 100 also includes a mounting housing 140, which internally defines a mounting chamber 141 for mounting a first molecular sieve barrel 110 and a second molecular sieve barrel 120. The mounting chamber 141 has an opening for the first molecular sieve barrel 110 and the second molecular sieve barrel 120 to enter and exit, and a lower end cover 131 is installed at the opening. The mounting housing 140 is provided with a mounting base 142 on one side of the opening. The oxygen generator 100 also includes an oxygen tank 150, which is mounted on the mounting base 142. The mounting base 142 has an oxygen inlet connector through hole 1421 through which the oxygen inlet connector 151 of the oxygen tank 150 is inserted to insert into the oxygen outlet 1317 of the lower end cover 131.

[0059] The oxygen tank 150 has two oxygen inlet connectors 151, and the mounting base 142 is provided with two oxygen inlet connector through holes 1421 (e.g., Figure 6 (As shown). See also Figure 4 Two oxygen inlet connectors 151 are inserted into two oxygen outlet ports 1317 respectively, passing through two oxygen inlet connector holes 1421. The oxygen inlet connectors 151 can collect oxygen from the first oxygen channel 1313 and the second oxygen channel 1315 into the oxygen tank 150. See also... Figure 3 and Figure 4 An oxygen inlet sealing ring 152 may also be provided between the oxygen inlet connector 151 and the oxygen outlet 1317.

[0060] See Figures 4-6 The lower end cover 131, cover plate 134, and mounting base 142 are each provided with connecting holes 1319. Cover plate 134 is detachably connected to lower end cover 131 by bolts 180, and lower end cover 131 is detachably connected to mounting base 142 by bolts 180. During assembly, cover plate 134 is first connected to lower end cover 131, and then lower end cover 131 is connected to mounting base 142. To improve assembly reliability and efficiency, positioning structures can be provided between cover plate 134 and lower end cover 131, and between lower end cover 131 and mounting base 142. For example... Figure 5 and Figure 6 As shown, a positioning post 1310 can be provided on the lower end cover 131, and a positioning hole 1422 adapted to the positioning post 1310 can be provided on the mounting base 142.

[0061] like Figure 3 As shown, the lower end cap assembly 130 may also include a lower end cap sealing gasket 136, which is used to seal between the lower end cap 131 and the lower ends of the first molecular sieve barrel 110 and the second molecular sieve barrel 120.

[0062] like Figure 3 and Figure 4As shown, the oxygen generator 100 may further include an upper cover 160, an upper cover sealing gasket 161, an air inlet / nitrogen outlet sealing ring 162, a control valve 170, and a control valve sealing ring 171. The upper cover 160 is connected to the upper ends of the first molecular sieve barrel 110 and the second molecular sieve barrel 120. The upper cover 160 has two air inlet / nitrogen outlets 163 (for air intake and nitrogen discharge from the molecular sieve barrels) respectively communicating with the first molecular sieve barrel 110 and the second molecular sieve barrel 120. The air inlet / nitrogen outlet sealing ring 162 is sealingly disposed between the air inlet / nitrogen outlets 163 and the mounting chamber 141. The control valve 170 is disposed above the mounting chamber 140, connected to the upper cover 160 through an opening in the mounting chamber 140, and sealed by the control valve sealing ring 171.

[0063] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0064] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the different embodiments can be combined in any way.

Claims

1. A lower end cap assembly for an oxygen concentrator, the oxygen concentrator (100) comprising a first molecular sieve barrel (110) and a second molecular sieve barrel (120) arranged side by side, characterized in that, The lower end cap assembly (130) includes a lower end cap (131) for connecting to the lower ends of the first molecular sieve barrel (110) and the second molecular sieve barrel (120). The lower end cap (131) has a purge air passage (1311) and two purge holes (1312) communicating with the purge air passage (1311). The two purge holes (1312) are used to communicate with the first molecular sieve barrel (110) and the second molecular sieve barrel (120) respectively.

2. The lower end cover assembly for an oxygen concentrator according to claim 1, characterized in that, The lower end cap assembly (130) has at least one of the following configurations: Method 1: The purge air passage (1311) extends on the plane of the lower end cover (131), and the two purge holes (1312) are arranged above the purge air passage (1311); Method 2: The two purge holes (1312) are located at both ends of the purge air passage (1311); Method 3: The lower end cap assembly (130) further includes two purge components (132) respectively disposed on the communication path between the two purge holes (1312) and the purge air passage (1311).

3. The lower end cover assembly for an oxygen generator according to claim 2, characterized in that, The purge air passage (1311) is a straight channel extending along the length of the lower end cap (131), and / or The purging component (132) is a throttling bridge. The purging component (132) is located close to the purging hole (1312) and is sealed to the purging hole (1312) by a purging sealing ring (133).

4. The lower end cover assembly for an oxygen generator according to claim 2, characterized in that, The purge hole (1312) is formed on the upper surface of the lower end cover (131), the purge air passage (1311) is recessed on the lower surface of the lower end cover (131), and the lower end cover assembly (130) further includes a cover plate (134) covering the lower surface of the lower end cover (131) to close the purge air passage (1311); and / or The lower end cap (131) also has a first oxygen channel (1313), a first oxygen outlet (1314) connecting the first oxygen channel (1313) and the first molecular sieve barrel (110), a second oxygen channel (1315), and a second oxygen outlet (1316) connecting the second oxygen channel (1315) and the second molecular sieve barrel (120).

5. The lower end cover assembly for an oxygen generator according to claim 4, characterized in that, An air passage sealing gasket (135) is provided between the cover plate (134) and the lower end cover (131), and / or The first oxygen channel (1313) and the second oxygen channel (1315) extend on the plane of the lower end cap (131), the first oxygen outlet (1314) is located above the first oxygen channel (1313), and the second oxygen outlet (1316) is located above the second oxygen channel (1315).

6. The lower end cover assembly for an oxygen generator according to claim 5, characterized in that, The first oxygen outlet (1314) and the second oxygen outlet (1316) are formed on the upper surface of the lower end cover (131), the first oxygen channel (1313) and the second oxygen channel (1315) are recessed on the lower surface of the lower end cover (131), and the cover plate (134) closes the first oxygen channel (1313) and the second oxygen channel (1315); and / or The lower end cap (131) also has two oxygen outlets (1317) that are respectively connected to the first oxygen channel (1313) and the second oxygen channel (1315).

7. The lower end cover assembly for an oxygen generator according to claim 6, characterized in that, The lower end cap (131) has a groove (1318) on its lower surface surrounding the purge air passage (1311), the first oxygen passage (1313) and the second oxygen passage (1315), and the air passage sealing gasket (135) is embedded in the groove (1318).

8. An oxygen generator, characterized in that, The oxygen generator (100) includes a first molecular sieve barrel (110) and a second molecular sieve barrel (120) arranged side by side, and a lower end cap assembly for the oxygen generator according to any one of claims 1-7, wherein the lower end cap assembly (130) is connected to the lower end of the first molecular sieve barrel (110) and the second molecular sieve barrel (120).

9. The oxygen generator according to claim 8, characterized in that, The oxygen generator (100) further includes a mounting housing (140) that defines a mounting chamber (141) for mounting the first molecular sieve barrel (110) and the second molecular sieve barrel (120). The mounting chamber (141) has an opening for the first molecular sieve barrel (110) and the second molecular sieve barrel (120) to enter and exit. The lower end cover (131) is mounted at the opening.

10. The oxygen generator according to claim 9, characterized in that, The mounting housing (140) is provided with a mounting base (142) on the opening side. The oxygen generator (100) also includes an oxygen tank (150), which is mounted on the mounting base (142). The mounting base (142) has an oxygen inlet connector through hole (1421) through which the oxygen inlet connector (151) of the oxygen tank (150) passes to insert into the oxygen outlet (1317) of the lower end cover (131).

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