CN212356533U

CN212356533U - Molecular sieve module

Info

Publication number: CN212356533U
Application number: CN202021066905.6U
Authority: CN
Inventors: 李恒; 何元胜; 黄鹏; 林仪
Original assignee: Shenzhen Lepu Intelligent Medical Equipment Co ltd
Current assignee: Shenzhen Lepu Intelligent Medical Equipment Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-01-15
Anticipated expiration: 2030-06-10

Abstract

The utility model relates to a molecular sieve module, which comprises a molecular sieve tower and a base component, wherein the base component comprises a base which is arranged at the bottom end of the molecular sieve tower, a shutoff valve and a check valve; the base is provided with a first air cavity, a second air cavity and a gas gathering cavity which are mutually separated; the base is provided with a first exhaust hole communicated with the first air cavity and the air gathering cavity and a second exhaust hole communicated with the second air cavity and the air gathering cavity; the shutoff valve is communicated with the first air cavity and the second air cavity; the check valve is used for respectively blocking the first exhaust hole and the second exhaust hole. The utility model concentrates the structure between the oxygen outlet end of the molecular sieve tower and the external gas storage tank on the base; the first air cavity, the second air cavity and the air collecting cavity are used for matching with a stop valve and a check valve to realize the functions of circularly and alternately generating oxygen and alternately reversely flushing the two molecular sieve towers; namely, when one molecular sieve tower generates oxygen, the other molecular sieve tower is backwashed; thereby effectively prolonging the service life of the molecular sieve and reducing the replacement frequency.

Description

Molecular sieve module

Technical Field

The utility model relates to an oxygenerator technical field, in particular to molecular sieve module.

Background

The molecular sieve oxygen-making equipment is a more extensive equipment for circularly making oxygen. The adsorption capacity of the molecular sieve to gas is increased along with the increase of gas pressure and the adsorption capacity of the molecular sieve to nitrogen and oxygen is different under the same gas pressure, and the oxygen is separated from the air by adopting a cyclic process of high-pressure adsorption and low-pressure desorption. Therefore, the molecular sieve module is a core component of the molecular sieve oxygen generation device.

Generally, a molecular sieve module comprises two molecular sieve towers which cyclically and alternately carry out adsorption and desorption, however, the adsorption and desorption capacities of molecular sieve materials in the molecular sieve towers are reduced along with the increase of the use times and time; molecular sieve modules generally suffer from a low service life and require frequent replacement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a molecular sieve module to improve the life of current molecular sieve module, avoid frequent change.

In order to solve the technical problem, the utility model adopts the following technical scheme:

according to one aspect of the present invention, the present invention provides a molecular sieve module, comprising; a plurality of molecular sieve columns arranged side by side; and a base assembly comprising: the base is arranged at the bottom end of the molecular sieve tower; the base is provided with a first air cavity, a second air cavity and a gas gathering cavity which are mutually separated; the first air cavity and the second air cavity are respectively communicated with the molecular sieve tower; the base is provided with a first exhaust hole for communicating the first air cavity with the air gathering cavity, a second exhaust hole for communicating the second air cavity with the air gathering cavity, and an air outlet pipe for communicating the air gathering cavity with an external air storage tank; the shutoff valve is embedded on the cavity wall between the first air cavity and the second air cavity and is used for communicating the first air cavity with the second air cavity; and the check valve is arranged in the gas collecting cavity and used for respectively blocking the first exhaust hole and the second exhaust hole.

In some embodiments of the present application, the base assembly further includes a bottom cover, the air-gathering chamber is opened on a bottom surface of the base, and the bottom cover is connected with the base in a matching manner to seal the air-gathering chamber.

In some embodiments of the present application, the base assembly further comprises a first seal ring; a sealing ring groove is formed in the bottom of the base around the periphery of the air gathering cavity, and a clamping ring protrusion matched with the sealing ring groove is arranged on the bottom cover; the first sealing ring is clamped between the sealing ring groove and the embedding ring protrusion.

In some embodiments of the present application, the check valve includes a fixing portion and a shielding portion extending outward from two sides of the fixing portion, and the fixing portion is fixed on the base and located between the first exhaust hole and the second exhaust hole; the two shielding parts respectively block the first exhaust hole and the second exhaust hole.

In some embodiments of the present application, the first air cavity and the second air cavity are respectively opened on the top surface of the base; a plurality of first surrounding sleeve parts which are circumferentially closed are arranged on the top surface of the base in an upward protruding mode, and the first air cavity and the second air cavity are respectively arranged in the first surrounding sleeve parts; the bottom end of the molecular sieve tower is sleeved on the first surrounding sleeve part.

In some embodiments of the present application, a second seal ring is sandwiched between the bottom end of the molecular sieve column and the outer wall of the first jacket portion.

In some embodiments of the present application, the molecular sieve module further comprises a top cover and a solenoid valve, the top cover is installed at the top end of the molecular sieve tower; the electromagnetic valve is arranged on the top cover; the molecular sieve column has a top port and a bottom port for air to enter and exit; and the top cover is internally provided with an airflow channel which is respectively communicated with the molecular sieve tower and the electromagnetic valve, one port of the airflow channel is communicated with the top port of the molecular sieve tower, and the other port of the airflow channel is communicated with the electromagnetic valve.

In some embodiments of the present application, a plurality of second circumferentially closed surrounding portions are convexly arranged on the bottom surface of the top cover; the top end openings of the molecular sieve towers are respectively sleeved on the second surrounding sleeve parts; and the port of the airflow channel communicated with the molecular sieve tower is arranged in the outline of the second surrounding sleeve part.

Some embodiments of this application, the solenoid valve includes that inside has the valve body of valve pocket, be equipped with respectively the intercommunication on the valve body inlet channel, exhaust passage and a plurality of air outlet channel of valve pocket, air outlet channel respectively with one air current passageway is linked together.

In some embodiments of the present application, the molecular sieve module further comprises a silencer, an inlet of the silencer being in communication with the exhaust passage via a pipe.

According to the above technical scheme, the embodiment of the utility model provides an at least have following advantage and positive effect:

in the molecular sieve module provided by the embodiment of the utility model, the structure between the oxygen outlet end of the molecular sieve tower and the external gas storage tank is centralized on the base, so that the use quantity of parts is reduced, the assembly time is shortened, and the maintenance and the replacement are convenient; the first air cavity, the second air cavity and the air gathering cavity which are arranged on the base are matched with a stop valve and a check valve which are integrated on the base, so that the functions of circularly and alternately generating oxygen and alternately backwashing the two molecular sieve towers are realized; namely, when one molecular sieve tower generates oxygen, the other molecular sieve tower is backwashed; thereby effectively prolonging the service life of the molecular sieve and reducing the replacement frequency; the integrated oxygen generating device has simple structure and high integration level, and can effectively reduce the cost of the oxygen generating device.

Drawings

Fig. 1 is a schematic structural diagram of a molecular sieve module according to an embodiment of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a cross-sectional view of fig. 1.

Fig. 4 is an enlarged view of the layout of the area a in fig. 3.

Figure 5 is a partial cross-sectional view of a molecular sieve module according to an embodiment of the invention.

Fig. 6 is an enlarged view of the layout of the region B in fig. 5.

Fig. 7 is a schematic view of the working principle of fig. 6.

Fig. 8 is an exploded view of the base assembly according to an embodiment of the present invention.

Fig. 9 is a view of fig. 8 from another perspective.

Fig. 10 is a schematic view of an assembly structure of the base and the check valve according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a bottom cover according to an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a base according to an embodiment of the present invention.

The reference numerals are explained below:

1. a molecular sieve column;

11. a lower filter plate; 12. lower filter cotton; 13. installing filter cotton; 14. an upper filter plate; 15. pressing the spring;

2. a top cover;

21. a second surrounding sleeve part; 22. an air flow channel;

3. an electromagnetic valve;

31. a valve body; 32. an air intake passage; 33. an exhaust passage; 34. an air outlet channel;

4. a muffler;

5. a base assembly;

51. a base; 52. a shut-off valve; 53. a check valve; 54. a bottom cover; 55. a first seal ring; 56. a second seal ring;

511. a first air cavity; 512. a second air cavity; 513. a gas collection cavity; 514. sealing the ring groove; 515. a first surrounding sleeve part; 516. an air outlet pipe; 531. a fixed part; 532. a shielding portion; 541. embedding a ring convex; 542. a lug portion;

5111. a first exhaust port; 5121. a second vent hole.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the related art, the molecular sieve modules comprise two molecular sieve modules, typically in a split configuration; there are also some integrated structures, but the integration level is not high, and there is usually a defect of short service life, and it needs to be replaced frequently.

Figure 1 is a schematic structural diagram of a molecular sieve module according to an embodiment of the present invention. Fig. 2 is an exploded view of fig. 1. Fig. 3 is a cross-sectional view of fig. 1.

Referring to fig. 1 to 3, the molecular sieve module provided by the present invention comprises a molecular sieve tower 1, a top cover 2, a solenoid valve 3, a silencer 4 and a base assembly 5.

The molecular sieve tower 1 is a cylindrical structure body, and the upper end and the lower end of the molecular sieve tower are respectively provided with a top port and a bottom port for gas to enter and exit; the molecular sieve towers 1 are provided with a plurality of molecular sieve towers 1, two or more molecular sieve towers 1 can be arranged side by side.

The molecular sieve tower 1 is internally provided with a lower filter plate 11, a lower filter cotton 12, a molecular sieve material, an upper filter cotton 13, an upper filter plate 14 and a pressing spring 15 from bottom to top in sequence.

Wherein, a plurality of through holes are arranged on the lower filter plate 11 and the upper filter plate 14 respectively to allow the gas to flow upwards or downwards.

The lower filter cotton 12 and the upper filter cotton 13 respectively filter the passing gas, and the molecular sieve material between the lower filter cotton 12 and the upper filter cotton 13 is prevented from passing through the through holes on the lower filter cotton 12 and the upper filter cotton 13.

The molecular sieve material, such as natural zeolite or synthetic zeolite, is a single micro-porous material, can adsorb gas or liquid, can adsorb nitrogen in the air under high pressure, thereby collecting and producing high-concentration oxygen, and desorbs and releases nitrogen under low pressure to realize cyclic oxygen production.

The adsorption and desorption capacity of the molecular sieve material is reduced along with the increase of the use times and time, so the service life of the molecular sieve is limited; and the service life of the molecular sieve can be effectively prolonged by back flushing with high-purity oxygen.

The lower end of the abutting spring 15 abuts against the upper filter plate 14, the upper end of the abutting spring 15 abuts against the top cover 2, and the abutting spring 15 is used for providing clamping force for the upper filter plate 14 and the lower filter plate 11, so that the molecular sieve material is fixed between the lower filter cotton 12 and the upper filter cotton 13, the density and the uniformity of the molecular sieve material are kept, and the adsorption and desorption capacity to the air flowing through is effectively ensured.

Still referring to fig. 1 to 3, a top cover 2 is provided at the top end of the molecular sieve column 1 for fixedly closing the top end of each molecular sieve column 1.

A plurality of second surrounding sleeve parts 21 which are circumferentially closed are convexly arranged downwards on the bottom surface of the top cover 2, and the structures of the second surrounding sleeve parts 21 are matched with the top ports of the molecular sieve tower 1, so that the top ports of the molecular sieve tower 1 are respectively sleeved on the second surrounding sleeve parts 21; a sealing ring can be clamped between the top port of the molecular sieve tower 1 and the outer peripheral wall of the second surrounding sleeve part 21, so as to improve the sealing property between the top port of the molecular sieve tower 1 and the second surrounding sleeve part 21.

A plurality of airflow channels 22 for communicating the molecular sieve tower 1 with the outside are arranged in the top cover 2, one end opening of each airflow channel 22 is communicated with the inside of the molecular sieve tower 1 through the top end opening of the molecular sieve tower 1, and the end opening is arranged in the range of the second surrounding sleeve part 21; the other port is used for communicating with the outside; air flows into the molecular sieve column 1 through the air flow passage 22, or flows out of the molecular sieve column 1.

Still referring to fig. 1 to 3, the solenoid valve 3 is mounted on the top cover 2, the solenoid valve 3 includes a valve body 31 having a valve cavity (not shown) therein, and the valve body 31 is provided with an air inlet passage 32, an air outlet passage 33 and a plurality of air outlet passages 34 respectively communicating with the valve cavity; the gas outlet channels 34 are respectively communicated with a gas flow channel 22, and the number of the gas outlet channels 34 is the same as that of the gas flow channels 22 and the molecular sieve towers 1.

The air inlet passage 32 is used for allowing external air to enter, the external air can be compressed by the air pump, and the compressed air enters the valve cavity through the air inlet passage 32.

The valve cavity is controlled by the internal structure, so that compressed air can enter a molecular sieve tower 1 through one air outlet channel 34 and the corresponding air flow channel 22 to carry out nitrogen adsorption and separate nitrogen and oxygen; while the air in the other molecular sieve column 1 can be returned to the valve cavity through the other air flow channel 22 and the corresponding air outlet channel 34 and discharged through the air discharge channel 33. Carry out the selective control in the valve pocket through solenoid valve 3, the gaseous entering or the outflow in steerable air outlet channel 34 and the air current passageway 22 that corresponds to realize that one of them molecular sieve tower 1 adsorbs nitrogen gas, separation oxygen, and nitrogen gas is released in the desorption of one or more other molecular sieve tower 1, thereby carries out nitrogen-oxygen separation, alternate circulation system oxygen process, obtains pure oxygen.

Still referring to fig. 1 to 3, the muffler 4 is mounted on the top cover 2; the muffler 4 has an inlet and an outlet. The inlet of the silencer 4 is communicated with the exhaust passage 33 of the electromagnetic valve 3 through a pipeline, so that nitrogen discharged through the exhaust passage 33 enters the silencer 4 to reduce noise, and is discharged from the outlet of the silencer 4 after noise reduction. The muffler 4 may be fixed near the electronic valve to shorten the connection length of the pipe, thereby effectively reducing the explosion sound during the nitrogen discharge.

Fig. 4 is an enlarged view of the layout of the area a in fig. 3. Figure 5 is a partial cross-sectional view of a molecular sieve module of an embodiment of the invention. Fig. 6 is an enlarged view of the layout of the region B in fig. 5. Fig. 7 is a schematic view of the working principle of fig. 6.

Referring to fig. 1 to 7, the base assembly 5 is a core component of the molecular sieve module, and is installed at the bottom end of the molecular sieve tower 1, and is used for fixedly closing the bottom end port of each molecular sieve tower 1, and guiding out oxygen generated after nitrogen is adsorbed in the molecular sieve tower 1 during the operation, so as to facilitate continuous collection.

Referring to fig. 4 to 7, the base assembly 5 includes a base 51, a shutoff valve 52, a check valve 53, a bottom cover 54, a first sealing ring 55, and a second sealing ring 56.

Wherein, the base 51 is arranged at the bottom end of the molecular sieve tower 1; a plurality of air cavities are formed in the top of the base 51 and are separated from one another; such as the first air chamber 511 and the second air chamber 512, the number of the air chambers may be set according to the number of the molecular sieve towers 1. The first air cavity 511 and the second air cavity 512 are both formed by the downward concave arrangement of the top surface of the base 51, so that the first air cavity 511 and the second air cavity 512 are respectively communicated with the bottom port of the molecular sieve tower 1; the shutoff valve 52 is embedded on the cavity wall between the first air cavity 511 and the second air cavity 512 for communicating the first air cavity 511 and the second air cavity 512; when the number of the air chambers is increased, a shut-off valve 52 can be correspondingly arranged on the chamber wall between the adjacent air chambers for communication. In addition, the first air chamber 511 and the second air chamber 512 are formed by recessing the top surface of the base 51 downward, which also facilitates the assembly of the shutoff valve 52.

The bottom of the base 51 is provided with a gas collecting cavity 513, and the base 51 is provided with a gas outlet pipe 516 for communicating the gas collecting cavity 513 with an external gas storage tank (not shown); the air collecting chamber 513 is positioned below the first air chamber 511 and the second air chamber 512 and is separated from the first air chamber 511 and the second air chamber 512; and the gas collecting chamber 513 is used for being respectively communicated with the first gas chamber 511, the second gas chamber 512 and other gas chambers, so that oxygen in each molecular sieve tower 1 respectively enters the gas collecting chamber 513, and an external gas storage tank can continuously collect the oxygen through the gas outlet pipe 516.

As shown in fig. 6 and 7, the first air chamber 511 is communicated with the air collection chamber 513 through a first air discharge hole 5111, and the second air chamber 512 is communicated with the air collection chamber 513 through a second air discharge hole 5121; the first vent hole 5111 and the second vent hole 5121 both have a larger aperture than the aperture of the shut-off valve 52, so that when the molecular sieve tower 1 communicated with the first air chamber 511 performs oxygen generation, most of the oxygen entering the first air chamber 511 from the molecular sieve tower 1 enters the gas collecting chamber 513 through the first vent hole 5111, and a small part of the oxygen enters the second air chamber 512 through the shut-off valve 52.

Fig. 8 is an exploded schematic view of the base assembly 5 according to the embodiment of the present invention. Fig. 9 is a view of fig. 8 from another perspective. Fig. 10 is a schematic view of an assembly structure of the base 51 and the check valve 53 according to the embodiment of the present invention.

Referring to fig. 6 to 10, the check valve 53 is disposed in the gas collecting chamber 513 to block the first and

second exhaust holes

5111 and 5121, respectively. In some embodiments, the check valve 53 may include a fixing portion 531 and blocking portions 532 respectively extending outward from both sides of the fixing portion 531; the fixing portion 531 is fixedly disposed on the base 51 and located between the first air outlet 5111 and the second air outlet 5121; the shielding parts 532 at both ends are respectively blocked on the first exhaust hole 5111 and the second exhaust hole 5121; the fixing portion 531 may be fixed on a cavity wall at the top of the air collecting cavity 513, so that the shielding portion 532 is attached to the first air outlet 5111 and the second air outlet 5121 to achieve a blocking effect.

Referring to fig. 7, by selective control of the electromagnetic valve 3, the compressed gas can enter the molecular sieve tower 1 communicated with the first air chamber 511 to perform adsorption and oxygen generation, and at the same time, the molecular sieve tower 1 communicated with the second air chamber 512 is communicated with the exhaust passage 33 and the silencer 4 to perform desorption and nitrogen discharge.

At this time, most of the high-pressure oxygen in the first air chamber 511 pushes the shielding part 532 at the first air vent 5111 through the first air vent 5111, and enters the air collecting chamber 513; a small portion of oxygen enters the second air chamber 512 through the shutoff valve 52; therefore, the air pressure in the air collecting chamber 513 is far greater than that of the second air chamber 512, and under the action of the pressure difference between the air collecting chamber 513 and the second air chamber 512, the shielding part 532 at the second vent hole 5121 clings to the second vent hole 5121 under the action of the air pressure, so that the second vent hole 5121 is blocked, oxygen in the air collecting chamber 513 is prevented from entering the second air chamber 512, and the oxygen in the air collecting chamber 513 can only enter the air storage tank through the air outlet pipe 516 for collection. And part of the oxygen gas entering the second gas chamber 512 through the shutoff valve 52 flows upward to back-flush the molecular sieve column 1 communicating with the second gas chamber 512 and is discharged together with the nitrogen gas at the desorption position.

Through the alternative selection control of the electromagnetic valve 3, the molecular sieve towers 1 can be subjected to oxygen generation one by one, and are alternately and reversely flushed, and the service life of the molecular sieve materials in the molecular sieve towers 1 is effectively prolonged through a reverse flushing mode; meanwhile, the oxygen separated from each molecular sieve tower 1 alternately enters the gas collecting cavity 513 and is mixed in a short time, so that the consistency and uniformity of oxygen collection are ensured.

Fig. 11 is a schematic structural diagram of the bottom cover 54 according to the embodiment of the present invention.

Referring to fig. 6 to 11, the bottom cover 54 is disposed at the bottom of the base 51, and the air collecting chamber 513 is disposed on the bottom surface of the base 51, is formed by the bottom surface of the base 51 being recessed upward, and is connected to the base 51 through the bottom cover 54 to seal the air collecting chamber 513.

The bottom cover 54 is provided with a clamping ring protrusion 541 which is of a closed ring structure, the base 51 is correspondingly provided with a sealing ring groove 514 which is matched with the clamping ring protrusion 541 and distributed around the peripheral side of the air collecting chamber 513, the first sealing ring 55 is arranged in the sealing ring groove 514, when the bottom cover 54 and the base 51 are in alignment fit and fixed, the clamping ring protrusion 541 is assembled in the sealing ring groove 514 in an alignment manner, and the first sealing ring 55 is clamped between the sealing ring groove 514 and the clamping ring protrusion 541, so that the sealing performance between the bottom cover 54 and the base 51 is realized.

The week side of bottom 54 is equipped with a plurality of lugs 542 that extend outward, has seted up the screw hole on lugs 542, and the screw hole of counterpointing the cooperation and connecting is seted up to base 51's bottom surface to screw hole through lugs 542 on and the screw hole cooperation on the base 51, carry out quick counterpoint to bottom 54 and base 51 and be connected.

Fig. 12 is a schematic structural diagram of the base 51 according to the embodiment of the present invention.

Referring to fig. 7, 8 and 12, a plurality of circumferentially closed first surrounding portions 515 are convexly disposed upward on the top surface of the base 51, the number of the first surrounding portions 515 may be the same as that of the molecular sieve towers 1, and the first air cavity 511 and the second air cavity 512 are respectively disposed in the first surrounding portions 515; the bottom port of the molecular sieve column 1 is sleeved on a first sleeve portion 515, so that the molecular sieve column 1 is connected by the first sleeve portion 515 through quick assembly. The second sealing ring 56 is sleeved on the first enclosure portion 515 and clamped between the outer wall of the first enclosure portion 515 and the bottom port of the molecular sieve tower 1, so as to improve the sealing performance between the base 51 and the molecular sieve tower 1. The upper end of the first surrounding portion 515 abuts against the lower filter plate 11 to provide a supporting force for the lower filter plate 11.

The utility model discloses a theory of operation is: the electromagnetic valve 3 is selectively controlled to make the compressed air enter one of the molecular sieve towers 1 through the air inlet channel 32 and flow downwards; in the process that the compressed air flows downwards in the molecular sieve tower 1, nitrogen is adsorbed by the molecular sieve material, the separated oxygen enters the first air cavity 511 below, wherein most of the oxygen pushes open the shielding part 532 at the first exhaust hole 5111 and enters the air converging cavity 513, and a small part of the oxygen enters the second air cavity 512 through the shutoff valve 52; due to the action of the pressure difference between the gas gathering cavity 513 and the second gas cavity 512, the shielding part 532 at the second gas vent 5121 is tightly attached to the second gas vent 5121, so that the second gas vent 5121 is blocked, oxygen in the gas gathering cavity 513 can only flow into an external gas storage tank through the gas outlet pipe 516 for collection, oxygen in the second gas cavity 512 enters another molecular sieve tower 1 and flows from bottom to top, molecular sieve materials in the molecular sieve tower 1 are reversely flushed, and enter the silencer 4 through the gas outlet passage 33 of the electromagnetic valve 3 along with nitrogen at the desorption part for silencing and reducing noise, and finally the oxygen is discharged out of the silencer 4; through the alternate selection control of the electromagnetic valve 3, each molecular sieve tower 1 can realize the function of alternate cycle oxygen generation and alternate back flushing.

in the molecular sieve module provided by the embodiment of the utility model, the structure between the oxygen outlet end of the molecular sieve tower 1 and the external gas storage tank is centralized on the base 51, so that the use number of parts is reduced, the assembly time is shortened, and the maintenance and the replacement are convenient; the functions of circularly and alternately generating oxygen and alternately backwashing two molecular sieve towers 1 are realized by utilizing a first air cavity 511, a second air cavity 512 and an air collecting cavity 513 which are arranged on a base 51 and matching with a shutoff valve 52 and a check valve 53 which are integrated on the base 51; namely, when one molecular sieve tower 1 generates oxygen, the other molecular sieve tower 1 is backwashed; thereby effectively prolonging the service life of the molecular sieve and reducing the replacement frequency; the integrated oxygen generating device has simple structure and high integration level, and can effectively reduce the cost of the oxygen generating device.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A molecular sieve module, comprising:

a plurality of molecular sieve columns arranged side by side; and

a base assembly, comprising:

the base is arranged at the bottom end of the molecular sieve tower; the base is provided with a first air cavity, a second air cavity and a gas gathering cavity which are mutually separated; the first air cavity and the second air cavity are respectively communicated with the molecular sieve tower; the base is provided with a first exhaust hole for communicating the first air cavity with the air gathering cavity, a second exhaust hole for communicating the second air cavity with the air gathering cavity, and an air outlet pipe for communicating the air gathering cavity with an external air storage tank;

the shutoff valve is embedded on the cavity wall between the first air cavity and the second air cavity and is used for communicating the first air cavity with the second air cavity; and

and the check valve is arranged in the gas collecting cavity and used for respectively blocking the first exhaust hole and the second exhaust hole.

2. The molecular sieve module of claim 1, wherein the base assembly further comprises a bottom cover, the gas trap chamber opening on a bottom surface of the base, the bottom cover matingly coupled to the base to enclose the gas trap chamber.

3. The molecular sieve module of claim 2, wherein the base assembly further comprises a first seal ring;

a sealing ring groove is formed in the bottom of the base around the periphery of the air gathering cavity, and a clamping ring protrusion matched with the sealing ring groove is arranged on the bottom cover; the first sealing ring is clamped between the sealing ring groove and the embedding ring protrusion.

4. The molecular sieve module of claim 1, wherein the check valve comprises a fixed portion and a blocking portion extending outwardly from each side of the fixed portion; the fixing part is fixedly arranged on the base and is positioned between the first exhaust hole and the second exhaust hole; the two shielding parts respectively block the first exhaust hole and the second exhaust hole.

5. The molecular sieve module of claim 1, wherein the first air cavity and the second air cavity are respectively open on a top surface of the base;

a plurality of first surrounding sleeve parts which are circumferentially closed are arranged on the top surface of the base in an upward protruding manner;

the first air cavity and the second air cavity are respectively arranged in the first surrounding sleeve part;

the bottom end of the molecular sieve tower is sleeved on the first surrounding sleeve part.

6. The molecular sieve module of claim 5, wherein a second seal ring is sandwiched between the bottom end of the molecular sieve column and the outer wall of the first enclosure portion.

7. The molecular sieve module of claim 1, further comprising a top cover and a solenoid valve;

the top cover is arranged at the top end of the molecular sieve tower; the electromagnetic valve is arranged on the top cover;

the molecular sieve column has a top port and a bottom port for air to enter and exit;

and the top cover is internally provided with an airflow channel which is respectively communicated with the molecular sieve tower and the electromagnetic valve, one port of the airflow channel is communicated with the top port of the molecular sieve tower, and the other port of the airflow channel is communicated with the electromagnetic valve.

8. The molecular sieve module of claim 7, wherein the bottom surface of the top cover has a plurality of second circumferentially closed jacket portions projecting downwardly therefrom;

the top end openings of the molecular sieve towers are respectively sleeved on the second surrounding sleeve parts;

and the port of the airflow channel communicated with the molecular sieve tower is arranged in the outline of the second surrounding sleeve part.

9. The molecular sieve module of claim 7, wherein the solenoid valve comprises a valve body having a valve cavity therein, the valve body is provided with an inlet channel, an outlet channel and a plurality of outlet channels, the inlet channel, the outlet channel and the outlet channels are respectively communicated with the valve cavity, and the outlet channels are respectively communicated with one of the gas flow channels.

10. The molecular sieve module of claim 9, further comprising a muffler, an inlet of the muffler being in communication with the exhaust passage by a conduit.