A drying device for a pressure swing adsorption oxygen concentrator

Abstract

The application provides a drying device of a pressure swing adsorption oxygen concentrator, which comprises a combination and a conical connecting shell, both ends of the combination are connected and fixed with the conical connecting shell, the combination comprises a main shell and a fixing block and a plurality of round tubes, the material of the round tubes is a molecular sieve membrane, a plurality of fixing holes are arranged on the fixing block, the round tubes are fixed and plugged into the fixing holes, and an air inlet and an air outlet are arranged on the main shell. The application can quickly adsorb the moisture of air in the oxygen concentrator, improve the performance and service life of the adsorption column.

Description

Technical Field

[0001] This invention belongs to the field of oxygen concentrator technology, specifically relating to the drying device of an oxygen concentrator. Background Technology

[0002] With the continuous development of technology, oxygen concentration technology is also constantly improving. Pressure swing adsorption (PSA) oxygen concentrators are currently a commonly used type of oxygen concentrator. They separate impurities such as nitrogen from the air through the adsorption properties of the adsorbent, thereby obtaining a high concentration of oxygen. In a PSA oxygen concentrator, the gas undergoes compression, cooling, and purification before passing through the adsorption column, thus achieving the separation of oxygen and nitrogen. However, because the adsorbent in the adsorption column adsorbs a large amount of moisture, it leads to a reduction in the performance and lifespan of the adsorption column. Summary of the Invention

[0003] The purpose of this invention is to provide a drying device for a pressure swing adsorption oxygen concentrator to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a drying device for a pressure swing adsorption oxygen concentrator, comprising an assembly and a conical connecting shell, wherein the conical connecting shell is fixedly connected to both ends of the assembly, the assembly comprising a main shell, a fixing block, and several circular tubes, wherein the circular tubes are made of molecular sieve membrane, the fixing block is provided with several fixing holes, and the circular tubes are fixedly inserted into the fixing holes, and the main shell is provided with an air inlet and an air outlet.

[0005] Preferably, the side wall of the fixing block is provided with an annular groove, and a first sealing ring is installed in the annular groove.

[0006] Preferably, the fixing hole has a plug hole and a through hole, and the diameter of the plug hole is larger than that of the through hole.

[0007] Preferably, the round tube is fixedly inserted into the insertion hole of the fixing hole.

[0008] Preferably, a second sealing ring is provided between the round tube and the fixing hole.

[0009] Preferably, the fixing blocks are fixedly connected to both ends of the circular tube, and the circular tube is conductively connected to the fixing holes.

[0010] Preferably, the air inlet is located at the first end of the main housing, and the exhaust outlet is located at the second end of the main housing.

[0011] Preferably, the air inlet is connected to the exhaust port through the main housing, and the air inlet introduces dry hot air into the main housing.

[0012] Preferably, the number of the circular tubes is equal to the number of the fixing holes.

[0013] Preferably, the conical connecting shell is fixedly welded to the assembly.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention can rapidly adsorb moisture from the air in an oxygen concentrator, improving the performance and lifespan of the adsorption column. The invention uses a circular tube, made of molecular sieve membrane, to introduce freshly compressed air into the oxygen concentrator. This allows moisture in the air inside the tube to be adsorbed onto the outer wall. Dry, hot air is then circulated through the inlet to evaporate the moisture on the outer wall, keeping the tube relatively dry and enhancing its moisture adsorption capacity. This allows for rapid removal of moisture from the freshly compressed air in the oxygen concentrator, resulting in dry compressed air that enters the adsorption column. This reduces the influence of moisture in the air on the adsorbent in the column, enabling rapid adsorption of nitrogen and other impurities, thus improving the performance and lifespan of the adsorption column. Attached Figure Description

[0016] Figure 1 A structural view of a drying device for a pressure swing adsorption oxygen concentrator according to the present invention.

[0017] Figure 2 A partially exploded view of the drying apparatus of a pressure swing adsorption oxygen concentrator according to the present invention.

[0018] Figure 3 A cross-sectional structural view of a drying device for a pressure swing adsorption oxygen concentrator according to the present invention.

[0019] Figure 4 An exploded structural view of the drying apparatus of a pressure swing adsorption oxygen concentrator according to the present invention.

[0020] Figure 5 An exploded structural view of the assembly of a drying device for a pressure swing adsorption oxygen concentrator according to the present invention.

[0021] Figure 6 A structural view of the fixed block of the drying device of a pressure swing adsorption oxygen concentrator according to the present invention.

[0022] Figure 7 A cross-sectional view of the fixed block structure of the drying device of a pressure swing adsorption oxygen concentrator according to the present invention.

[0023] Figure 8 A partially enlarged cross-sectional view of the fixed block structure of the drying device of a pressure swing adsorption oxygen concentrator according to the present invention.

[0024] The diagram shows: Assembly 1, Conical connecting shell 2, Main shell 11, Fixing block 12, Round tube 13, Fixing hole 120, Air inlet 110, Air outlet 111, Annular groove 121, First sealing ring 122, Insertion hole 1201, Through hole 1202, Second sealing ring 123. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1:

[0027] like Figures 1-8 As shown, the present invention provides a drying device for a pressure swing adsorption (PSA) oxygen concentrator, comprising a composite body 1 and a conical connecting shell 2. The conical connecting shell 2 is fixedly connected to both ends of the composite body 1. The composite body 1 includes a main shell 11, a fixing block 12, and several circular tubes 13. The circular tubes 13 are made of molecular sieve membrane. The fixing block 12 has several fixing holes 120, and the circular tubes 13 are fixedly inserted into the fixing holes 120. The main shell 11 has an air inlet 110 and an exhaust port 111. The side wall of the fixing block 12 has an annular groove 121, and a first sealing ring 122 is installed in the annular groove 121. The fixing holes 120 have insertion holes 1201 and through holes 1202, the diameter of the insertion hole 1201 being larger than the through hole 1202. The circular tubes 13 are fixedly inserted into the insertion holes 1201 of the fixing holes 120. A second sealing ring 123 is provided between the circular tubes 13 and the fixing holes 120. The circular tube 13 is fixedly connected to the fixing blocks 12 at both ends, and the circular tube 13 is conductively connected to the fixing holes 120. The air inlet 110 is located at the first end of the main housing 11, and the exhaust port 111 is located at the second end of the main housing 11. The air inlet 110 is conductively connected to the exhaust port 111 through the main housing 11, and the air inlet 110 introduces dry hot air into the main housing 11. The number of circular tubes 13 is equal to the number of fixing holes 120. The conical connecting shell 2 is fixedly welded to the assembly 1.

[0028] Through the above technical solution, this invention can quickly adsorb moisture from the air in an oxygen concentrator, improving the performance and lifespan of the adsorption column. The circular tube 13 of this invention, made of a molecular sieve membrane, is used to introduce freshly compressed air into the oxygen concentrator. This allows moisture in the air inside the tube to be adsorbed onto the outside of the tube wall. Dry, hot air is then circulated through the air inlet 110, evaporating the moisture on the outside of the tube 13 and keeping its outer wall relatively dry. This enhances the tube 13's ability to adsorb moisture, rapidly removing moisture from the freshly compressed air in the oxygen concentrator. The resulting dry compressed air then enters the adsorption column, reducing the influence of moisture in the air on the adsorbent. This allows for rapid adsorption of nitrogen and other impurities, improving the performance and lifespan of the adsorption column.

[0029] Example 2:

[0030] like Figures 1-8 As shown, the main objective of this invention is to provide a device for effectively drying gas during oxygen concentration, thereby improving concentration efficiency and extending equipment lifespan. The invention comprises a composite body 1 and a conical connecting shell 2, with the conical connecting shell 2 fixedly connected to both ends of the composite body 1. The composite body 1 consists of a main housing 11, a fixing block 12, and several circular tubes 13, the circular tubes 13 being made of molecular sieve membrane. The fixing block 12 has several fixing holes 120, and the circular tubes 13 are fixedly inserted into the fixing holes 120. The main housing 11 has an air inlet 110 and an exhaust port 111. The drying device of this invention is primarily based on the fact that during pressure swing adsorption (PSA) oxygen concentration, the presence of water vapor easily leads to condensation on the surface of the components, which affects the adsorption and desorption processes of gas within the components and negatively impacts the equipment's lifespan. When using the drying device of the present invention, the concentrated high-pressure humid gas is introduced into the circular tube 13. The circular tube 13 is made of a molecular sieve membrane, which can effectively adsorb the moisture in the humid gas. Water molecules are filtered through the molecular sieve membrane to the outside of the circular tube 13. Dry hot air is circulated in through the air inlet 110 and enters the main housing 11. The dry hot air can remove the moisture on the outer wall of the circular tube 13 and finally discharge it from the exhaust port 111, keeping the outer wall of the circular tube 13 dry, enhancing the moisture adsorption capacity of the molecular sieve membrane, and improving the drying performance of the present invention. In addition, the fixing block 12 of the present invention is provided with several fixing holes 120, which can easily fix the circular tube 13 to the fixing block 12, making the device more stable and also facilitating maintenance and replacement. In summary, the drying device for a pressure swing adsorption oxygen concentrator provided by the present invention has the advantages of simple structure, convenient use, and good drying effect, which can improve the efficiency and service life of oxygen concentrator equipment.

[0031] The fixing block 12 of the present invention has an annular groove 121 on its side wall, and a first sealing ring 122 is installed in the annular groove 121. This design can further improve the sealing performance of the device. Since the pressure swing adsorption oxygen concentrator needs to separate high-pressure gas through a molecular sieve membrane, the sealing performance of the device is very important. Therefore, the sealing performance must be considered when designing the drying device. The annular groove 121 on the side wall of the fixing block 12 and the first sealing ring 122 installed in the annular groove 121 can effectively prevent gas leakage. When the round tube 13 is fixedly inserted into the fixing hole 120, the first sealing ring 122 can play a sealing role and completely isolate the gas. At the same time, two first sealing rings 122 can also be provided on the side wall of the fixing block 12 to further improve the sealing performance of the device. In addition, the installation of the annular groove 121 and the sealing ring on the side wall of the fixing block 12 is also very convenient, which can reduce the manufacturing cost of the device. In summary, the design of having an annular groove 121 on the side wall of the fixing block 12 and installing the first sealing ring 122 in the annular groove 121 is a very practical technical solution that can further improve the sealing performance and stability of the drying device of the pressure swing adsorption oxygen concentrator.

[0032] The fixing hole 120 on the fixing block 12 of this invention is provided with an insertion hole 1201 and a through hole 1202. The diameter of the insertion hole 1201 is larger than that of the through hole 1202. This design can improve the insertion stability and uniformity of the circular tube 13. The fixing block 12 is an important component of the drying device, and its stability and sealing directly affect the purity and quality of oxygen. When the circular tube 13 is fixedly inserted into the fixing hole 120, the stability and sealing of the insertion need to be considered. Therefore, it is necessary to provide an insertion hole 1201 and a through hole 1202 in the fixing hole 120 of the fixing block 12. The larger diameter of the insertion hole 1201 allows the circular tube 13 to be inserted more stably into the fixing hole 120, preventing the circular tube 13 from loosening or falling out during use. The through hole 1202 allows oxygen to flow smoothly, ensuring the purity and quality of oxygen. Furthermore, the inclusion of the insertion hole 1201 and the through hole 1202 makes the drying device easier to clean and maintain. If it is necessary to replace the round tube 13 or clean the fixing hole 120, simply pull the round tube 13 out of the insertion hole 1201; this is very convenient. In summary, the design of the fixing hole 120 of the fixing block 12 with the insertion hole 1201 and the through hole 1202 is a very practical technical solution. It can improve the insertion stability of the round tube 13, ensure the purity and quality of oxygen, and also make the drying device easier to clean and maintain.

[0033] The circular tube 13 of this invention is fixedly inserted into the insertion hole 1201 of the fixing hole 120. This design can further improve the stability and sealing performance of the circular tube 13. The fixing hole 120 of the fixing block 12 is provided with an insertion hole 1201 and a through hole 1202, and the diameter of the insertion hole 1201 is larger than that of the through hole 1202. After the circular tube 13 is inserted into the insertion hole 1201, it can be more stably fixed in the fixing hole 120, preventing the circular tube 13 from loosening or falling off during use. In addition, the setting of the insertion hole 1201 can also improve the sealing performance of the circular tube 13. The circular tube 13 is made of molecular sieve membrane, which can remove moisture from the gas. After the circular tube 13 is fixedly inserted into the insertion hole 1201 of the fixing hole 120, it can ensure that oxygen flows out smoothly through the circular tube 13, while also ensuring the sealing performance of the fixing hole 120 and preventing gas leakage. As described above, the design of the round tube 13 being fixedly inserted into the insertion hole 1201 of the fixing hole 120 is a very practical technical solution that can further improve the stability and sealing of the round tube 13.

[0034] A second sealing ring 123 is provided between the circular tube 13 and the fixing hole 120 in this invention. This design can further improve the sealing performance and stability of the drying device, ensuring the purity and quality of oxygen. The second sealing ring 123 is located between the circular tube 13 and the fixing hole 120, and plays a sealing role. It can prevent gas leakage or impurities from mixing in, ensuring the purity and quality of oxygen. At the same time, the setting of the second sealing ring 123 can also further improve the stability of the fixing hole 120, preventing the circular tube 13 from loosening or falling off during use. The side wall of the fixing hole 120 is provided with an annular groove 121, and a first sealing ring 122 is installed in the annular groove 121. The second sealing ring 123 is located between the circular tube 13 and the fixing hole 120, forming a double seal with the first sealing ring 122 to prevent gas leakage. In addition, the material of the second sealing ring 123 is also very important. It needs to have good high temperature resistance, low temperature resistance and chemical stability to ensure that the drying device maintains good sealing performance in different environments. In summary, the design of providing a second sealing ring 123 between the round tube 13 and the fixing hole 120 is a very practical technical solution that can further improve the sealing performance and stability of the drying device. The double sealing setting can also prevent gas leakage.

[0035] In this invention, both ends of the circular tube 13 are fixedly connected to fixing blocks 12, and the circular tube 13 is conductively connected to the fixing hole 120. This design can further improve the stability and sealing of the drying device, ensuring the purity and quality of oxygen. The fixing blocks 12 at both ends of the circular tube 13 ensure that the circular tube 13 will not loosen or fall off during use. The fixing blocks 12 and the circular tube 13 can be fixedly connected by mechanical connection or welding to ensure the strength and stability of the connection. The conductive connection of the circular tube 13 to the fixing hole 120 ensures smooth oxygen flow and also ensures the sealing of the fixing hole 120, preventing gas leakage. The side wall of the fixing hole 120 is provided with an annular groove 121, and a first sealing ring 122 and a second sealing ring 123 are installed in the annular groove 121, which can further improve the sealing and stability of the drying device. In addition, the design of fixing blocks 12 at both ends of the circular tube 13 also facilitates the maintenance and replacement of the drying device. In summary, the design of fixing blocks 12 fixedly connected to both ends of the circular tube 13, and the circular tube 13 being connected through the fixing holes 120, is a very practical technical solution that can further improve the stability and sealing of the drying device. At the same time, the fixing method of the fixing blocks 12 also facilitates the maintenance and replacement of the drying device, thus extending its service life.

[0036] The air inlet 110 of the present invention is located at the first end of the main housing 11, and the exhaust port 111 is located at the second end of the main housing 11. Dry hot air is circulated through the air inlet 110. The dry hot air carries away the moisture on the outer wall of the circular tube 13 through the main housing 11 and discharges the moisture through the exhaust port 111. The circulation of dry hot air through the air inlet 110 improves the drying efficiency of the present invention.

[0037] The air inlet 110 of this invention is connected to the exhaust port 111 via the main housing 11, allowing dry hot air to be introduced into the main housing 11. This design further improves the drying efficiency of the drying device. The connection between the air inlet 110 and the exhaust port 111 allows hot air to enter the main housing 11 through the air inlet 110 and then exit through the exhaust port 111. The flow of hot air can remove moisture from the outer wall of the circular tube 13, thereby improving the drying efficiency of the drying device. The corresponding positions of the air inlet 110 and the exhaust port 111 ensure that hot air can flow smoothly through the circular tube 13 to dry the moisture. The introduction of dry hot air into the main housing 11 through the air inlet 110 improves the drying efficiency of the drying device. The temperature of the hot air is typically around 50°C, which can quickly evaporate the moisture inside the circular tube 13. The drying effect of hot air is better than that of room temperature air, allowing for a more thorough drying of the moisture inside the circular tube 13. In summary, the air inlet 110 is connected to the exhaust port 111 via the main housing 11, and the air inlet 110 introduces dry hot air into the main housing 11, which is a very practical technical solution. It can further improve the drying efficiency of the drying device.

[0038] The conical connecting shell 2 of this invention is fixedly welded to the assembly 1. This design increases the stability and sealing of the drying device. The fixed welding of the conical connecting shell 2 to the assembly 1 creates a tight interface between them. The welding method increases the stability and sealing of the drying device, improving its efficiency. Furthermore, the fixed welding of the conical connecting shell 2 facilitates the assembly and disassembly of the drying device. The welding method also makes the connection between the conical connecting shell 2 and the assembly 1 more secure and less prone to loosening. In summary, the fixed welding of the conical connecting shell 2 to the assembly 1 is a very practical technical solution. It can increase the stability and sealing of the drying device.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A drying device for a pressure swing adsorption (PSA) oxygen concentrator, comprising a composite body (1) and a conical connecting shell (2), wherein the conical connecting shell (2) is fixedly connected to both ends of the composite body (1), the composite body (1) comprising a main shell (11), a fixing block (12), and several circular tubes (13), wherein the circular tubes (13) are made of molecular sieve membranes and are used to adsorb and permeate moisture in compressed air introduced into them from the inside of the tubes to the outer wall of the tubes; the fixing block (12) is provided with several fixing holes (120), and both ends of the circular tubes (13) are fixedly inserted into the corresponding fixing holes (120), so that the circular tubes (13) are connected to the fixing holes (120); the main shell (11) is provided with an air inlet (110) and an exhaust port (111), the air inlet (110) is located at the first end of the main shell (11), and the exhaust port (111) is located at the second end of the main shell (11), characterized in that: The air inlet (110) is connected to the exhaust port (111) through the main housing (11). The air inlet (110) is used to introduce dry hot air into the main housing (11) to evaporate the moisture on the outer wall of the round tube (13) and discharge it from the exhaust port (111). The side wall of the fixing block (12) is provided with an annular groove (121), and a first sealing ring (122) is installed in the annular groove (121) to seal the gap between the fixing block (12) and the inner wall of the main housing (11); The fixing hole (120) is provided with a plug hole (1201) and a through hole (1202). The diameter of the plug hole (1201) is larger than that of the through hole (1202). The round tube (13) is fixedly inserted into the plug hole (1201).

2. The drying apparatus for a pressure swing adsorption oxygen concentrator according to claim 1, characterized in that, A second sealing ring (123) is provided between the round tube (13) and the fixing hole (120).

3. The drying apparatus for a pressure swing adsorption oxygen concentrator according to claim 1, characterized in that, The conical connecting shell (2) is fixedly welded onto the assembly (1).

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