Separating tower and oxygen storage tank integrated structure of oxygen generator

Abstract

The separation tower and oxygen storage tank integrated structure comprises a first separation tower, a second separation tower, an oxygen storage tank, an upper end sealing cover and a lower end sealing cover, the oxygen storage tank is arranged between the first separation tower and the second separation tower, and the tower wall of the first separation tower, the tower wall of the second separation tower and the tank wall of the oxygen storage tank are integrally formed; and an air inlet and an oxygen outlet are formed in the upper end sealing cover. The excess space between the first separation tower and the second separation tower is used for making the oxygen storage tank, the upper end sealing cover and the lower end sealing cover are used for sealing isolation, the original two separation tower pipes and the oxygen storage tank can be combined into one part, assembly is simple, the sealing effect is reliable, pipeline connection can be reduced, the material cost is reduced, and the production cost is reduced. Compared with the prior art, space is effectively utilized, in addition, defective finished products caused by defective pipelines, connectors and parts can be reduced, the yield is improved, materials are reduced, and meanwhile noise of the whole machine is effectively reduced.

Description

Technical Field

[0001] The invention relates to the field of oxygen generators, and in particular to an integrated structure of a separation tower and an oxygen storage tank of an oxygen generator. Background Art

[0002] Oxygen concentrators are widely used in homes, hospitals, sanatoriums, schools, hotels, sports venues, bars, oxygen bars, and plateau military stations. As people's awareness of health increases, the market for home oxygen concentrators has gradually emerged and has become an important health care device. As a home medical device, its market demand continues to grow with people's pursuit of a healthy life.

[0003] The separation tower is the core component of the oxygen generator to achieve air separation. It is equipped with a molecular sieve inside, which uses the difference in the molecular sieve's adsorption capacity for nitrogen and oxygen to achieve separation. Under pressure, nitrogen is adsorbed by the molecular sieve, while oxygen passes through the molecular sieve and is separated; the oxygen storage tank in the oxygen generator is used to store the oxygen separated in the separation tower and deliver it to users.

[0004] The separation tower and oxygen storage tank of the existing oxygen generator on the market are independent components, and are structurally independent plastic parts and aluminum parts of the oxygen production system. The oxygen separated in the separation tower is connected to the oxygen storage tank through a pipeline from the oxygen outlet, and the high-pressure gas supplied by the oxygen production valve to the separation tower is connected to separation tower A and separation tower B through a pipeline. The pipelines are numerous and complex, the sound-absorbing effect of the pipeline materials is generally poor, and the space occupied is also large.

[0005] Structural disadvantages of the separation tower and oxygen storage tank of the existing oxygen generator:

[0006] 1) There are many connected pipes, which increases the potential risks of defects, and also increases the material cost, processing cost and assembly labor cost;

[0007] 2) There are many pipelines, poor cleanliness and not beautiful enough;

[0008] 3) Pipe materials are mostly silicone, which has poor sound insulation effect. Summary of the invention

[0009] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide an integrated structure of a separation tower and an oxygen storage tank for an oxygen concentrator.

[0010] According to one aspect of the present invention, there is provided an integrated structure of a separation tower and an oxygen storage tank of an oxygen concentrator, comprising:

[0011] A first separation tower;

[0012] A second separation tower;

[0013] An oxygen storage tank is arranged between the first separation tower and the second separation tower. The tower wall of the first separation tower, the tower wall of the second separation tower and the tank wall of the oxygen storage tank are integrally formed. The oxygen separated in the first separation tower and the oxygen separated in the second separation tower can enter the oxygen storage tank.

[0014] An upper sealing cover, the first end of the first separation tower, the first end of the second separation tower, and the first end of the oxygen storage tank are all arranged on the upper sealing cover, and the upper sealing cover is provided with an air inlet and an oxygen outlet; and

[0015] The lower end sealing cover, the second end of the first separation tower, the second end of the second separation tower, and the second end of the oxygen storage tank are all arranged on the lower end sealing cover.

[0016] The separation tower and the oxygen storage tank are integrated into a structure, and the spare space between the first separation tower and the second separation tower is used to form the oxygen storage tank, and the upper sealing cover and the lower sealing cover are used for sealing and isolation. Since the tower wall of the first separation tower, the tower wall of the second separation tower, and the tank wall of the oxygen storage tank are integrally formed, the original three components of the two separation tower tubes and the oxygen storage tank can be combined into one component, which is simple to assemble and has a reliable sealing effect. The first separation tower and the second separation tower are respectively equipped with molecular sieves, and the spare space on the upper sealing cover is used to allow the compressed gas to enter the first separation tower and the second separation tower through the air inlet on the upper sealing cover. Second separation tower, oxygen stored in the oxygen storage tank can be discharged from the oxygen outlet on the upper sealing cover; the separation tower and the oxygen storage tank of the present invention are integrated into a simple structure, which can reduce pipeline connections, reduce material costs, and effectively utilize space. In addition, since the tower wall of the first separation tower, the tower wall of the second separation tower, and the tank wall of the oxygen storage tank are integrally formed, assembly can be reduced and simplified, and defective finished products caused by defects in pipelines, joints, and components themselves can be reduced, thereby improving the yield rate. Moreover, while reducing materials, the noise of the whole machine is effectively reduced. Through testing, the noise of the whole machine is effectively reduced by more than 3dBA.

[0017] Furthermore, a first accommodating chamber, a second accommodating chamber, a first oxygen inlet and a second oxygen inlet are provided on the lower end sealing cover, a third oxygen inlet connected to the first oxygen inlet is provided in the first accommodating chamber, a fourth oxygen inlet connected to the second oxygen inlet is provided in the second accommodating chamber, the second end of the first separation tower is enclosed around the periphery of the opening of the first accommodating chamber, the second end of the second separation tower is enclosed around the periphery of the opening of the second accommodating chamber, and the second end of the oxygen storage tank is enclosed around the first oxygen inlet and the second oxygen inlet.

[0018] Therefore, the lower end sealing cover can seal the second end of the first separation tower through the first accommodating cavity and the periphery of its opening, and the oxygen separated in the first separation tower can enter the oxygen storage tank for storage through the third oxygen inlet and the first oxygen inlet, and the lower end sealing cover can seal the second end of the second separation tower through the second accommodating cavity and the periphery of its opening, and the oxygen separated in the second separation tower can enter the oxygen storage tank for storage through the fourth oxygen inlet and the second oxygen inlet, and the oxygen stored in the oxygen storage tank can be discharged through the oxygen outlet on the upper end sealing cover.

[0019] Furthermore, a third accommodating chamber is provided on the lower end sealing cover, the second end of the oxygen storage tank is enclosed at the periphery of the opening of the third accommodating chamber, and the first oxygen inlet and the second oxygen inlet are located in the third accommodating chamber.

[0020] Therefore, the lower end sealing cover can seal the second end of the oxygen storage tank through the third accommodating cavity and the periphery of its opening, ensuring the sealing of oxygen entering the oxygen storage tank through the first oxygen inlet and the second oxygen inlet.

[0021] Furthermore, it also includes a first sealing ring, which is accommodated between the second end of the first separation tower, the second end of the second separation tower, the second end of the oxygen storage tank and the lower end sealing cover.

[0022] Therefore, the first sealing ring can further improve the sealing between the second end of the first separation tower, the second end of the second separation tower, the second end of the oxygen storage tank and the lower end sealing cover to prevent gas leakage.

[0023] Furthermore, a fourth accommodating chamber and a fifth accommodating chamber are provided on the upper sealing cover, the fourth accommodating chamber is provided with a first sub-air inlet that can be communicated with the air inlet, the fifth accommodating chamber is provided with a second sub-air inlet that can be communicated with the air inlet, the first end of the first separation tower is enclosed around the opening of the fourth accommodating chamber, the first end of the second separation tower is enclosed around the opening of the fifth accommodating chamber, and the first end of the oxygen storage tank is enclosed around the oxygen outlet.

[0024] Therefore, the upper sealing cover can seal the first end of the first separation tower through the fourth accommodating chamber and the periphery of its opening, and compressed air can enter the first separation tower through the air inlet and the first sub-air inlet. The upper sealing cover can seal the first end of the second separation tower through the fifth accommodating chamber and the periphery of its opening, and compressed air can enter the second separation tower through the air inlet and the second sub-air inlet. The upper sealing cover can simultaneously seal the first end of the oxygen storage tank, and the oxygen stored in the oxygen storage tank can be discharged through the oxygen outlet on the upper sealing cover.

[0025] Furthermore, a sixth accommodating chamber is provided on the upper sealing cover, the first end of the oxygen storage tank is enclosed at the periphery of the opening of the sixth accommodating chamber, and the oxygen outlet is located in the sixth accommodating chamber.

[0026] Therefore, the upper sealing cover can seal the first end of the oxygen storage tank through the sixth accommodating chamber and the periphery of its opening, and the oxygen stored in the oxygen storage tank can be discharged through the oxygen outlet in the sixth accommodating chamber.

[0027] Furthermore, it also includes a pressure regulating valve, which is arranged on the upper sealing cover and is connected to the oxygen storage tank.

[0028] Therefore, the pressure regulating valve can reduce the high-pressure oxygen in the oxygen storage tank to the working pressure required by the user, and at the same time, it can ensure that the oxygen has a stable working pressure when it is output.

[0029] Furthermore, it also includes a second sealing ring, which is accommodated between the first end of the first separation tower, the first end of the second separation tower, the first end of the oxygen storage tank and the upper end sealing cover.

[0030] Therefore, the second sealing ring can further improve the sealing between the first end of the first separation tower, the first end of the second separation tower, the first end of the oxygen storage tank and the upper sealing cover to prevent gas leakage.

[0031] Furthermore, a nitrogen exhaust port is provided on the upper sealing cover, and the nitrogen exhaust port can be communicated with the first sub-air inlet, and the nitrogen exhaust port can be communicated with the second sub-air inlet.

[0032] Therefore, when the nitrogen adsorbed by the molecular sieve in the first separation tower reaches saturation, the nitrogen in the first separation tower can be released into the atmosphere through the first sub-air inlet and the nitrogen exhaust port to reduce the pressure of the molecular sieve in the first separation tower, thereby restoring its nitrogen adsorption capacity; when the nitrogen adsorbed by the molecular sieve in the second separation tower reaches saturation, the nitrogen in the second separation tower can be released into the atmosphere through the second sub-air inlet and the nitrogen exhaust port to reduce the pressure of the molecular sieve in the second separation tower, thereby restoring its nitrogen adsorption capacity.

[0033] Furthermore, it also includes a two-position five-way valve, wherein the first port of the two-position five-way valve is connected to the air inlet, the second port of the two-position five-way valve is connected to the first sub-air inlet, the third port of the two-position five-way valve is connected to the second sub-air inlet, and the fourth port of the two-position five-way valve is connected to the nitrogen exhaust port.

[0034] Therefore, the connection between the air inlet and the first sub-inlet, the connection between the air inlet and the second sub-inlet, the connection between the first sub-inlet and the nitrogen exhaust port, the connection between the second sub-inlet and the nitrogen exhaust port, and the connection between the first sub-inlet and the second sub-inlet can be automatically controlled by the two-position five-way valve, so as to orderly realize the adsorption of nitrogen by the first separation tower (left suction), the connection between the first separation tower and the second separation tower to balance the pressure (equal pressure), the adsorption of nitrogen by the second separation tower (right suction), the connection between the first separation tower and the nitrogen exhaust port (desorption), and the connection between the second separation tower and the nitrogen exhaust port (desorption). BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of an integrated structure of a separation tower and an oxygen storage tank of an oxygen concentrator of the present invention;

[0036] Figure 2 for Figure 1 A schematic structural diagram of the separation tower and oxygen storage tank integrated structure from another perspective;

[0037] Figure 3 for Figure 1 A schematic diagram of the split structure of the separation tower and the oxygen storage tank integrated structure shown;

[0038] Figure 4 for Figure 2 A schematic diagram of the split structure of the separation tower and the oxygen storage tank integrated structure shown;

[0039] Figure 5 for Figure 3 A schematic diagram of the structure of the lower end sealing cover in the integrated structure of the separation tower and the oxygen storage tank shown;

[0040] Figure 6 for Figure 3 The schematic diagram of the structure of the first separation tower, the oxygen storage tank and the second separation tower in the integrated structure of the separation tower and the oxygen storage tank shown;

[0041] Figure 7 for Figure 4 The schematic diagram of the structure of the upper sealing cover in the integrated structure of the separation tower and oxygen storage tank is shown. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, unless otherwise specified, "multiple" means two or more; it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements.

[0044] See also Figures 1 to 7 An integrated structure of a separation tower and an oxygen storage tank of an oxygen concentrator includes a first separation tower 1, a second separation tower 2, an oxygen storage tank 3, an upper sealing cover 4, a lower sealing cover 5, a first sealing ring 6, a pressure regulating valve 7, a second sealing ring 8 and a two-position five-way valve 9.

[0045] See also Figure 3 and Figure 6 The oxygen storage tank 3 is located between the first separation tower 1 and the second separation tower 2. The first separation tower 1 and the second separation tower 2 are respectively equipped with molecular sieves. The difference in the adsorption capacity of the molecular sieves to nitrogen and oxygen is used to achieve separation. Under the action of pressure, nitrogen will be adsorbed by the molecular sieve, while oxygen passes through the molecular sieve and is separated. The tower wall of the first separation tower 1, the tower wall of the second separation tower 2, and the tank wall of the oxygen storage tank 3 are integrally formed. The first separation tower 1 and the second separation tower 2 are preferably arranged in parallel. In this way, the extra space between the first separation tower 1 and the second separation tower 2 is used. The oxygen storage tank 3 for storing oxygen can be made by combining the original two separation tower tubes and the oxygen storage tank into one component, and the assembly is simple. The tower wall of the first separation tower 1, the tower wall of the second separation tower 2, and the tank wall of the oxygen storage tank 3 can be made of aluminum. According to the characteristics of aluminum extrusion, the interval size between the first separation tower 1 and the second separation tower 2 can be made to form the oxygen storage tank 3 of the required size. The tower wall of the first separation tower 1, the tower wall of the second separation tower 2, and the tank wall of the oxygen storage tank 3 can be produced by die extrusion as a whole, and the required length can be cut according to demand.

[0046] See also Figure 1The upper sealing cover 4 is formed with an air inlet 41, and the compressed gas generated by the compressor in the oxygen concentrator can enter the first separation tower 1 and the second separation tower 2 through the air inlet 41 on the upper sealing cover 4. Figure 3 An oxygen outlet 42 is formed on the upper sealing cover 4, and the oxygen in the oxygen storage tank 3 can be discharged through the oxygen outlet 42 to be delivered to the user.

[0047] See also Figure 3 The upper end of the first separation tower 1 is the first end, and the lower end is the second end. The upper end of the second separation tower 2 is the first end, and the lower end is the second end. The upper end of the oxygen storage tank 3 is the first end, and the lower end is the second end. Figure 1 and Figure 2 The first end of the first separation tower 1, the first end of the second separation tower 2, and the first end of the oxygen storage tank 3 are all installed on the upper end sealing cover 4, and the upper end sealing cover 4 can seal and isolate the first end of the first separation tower 1, the first end of the second separation tower 2, and the first end of the oxygen storage tank 3; specifically: refer to Figure 4 and Figure 7A fourth accommodating chamber 43, a fifth accommodating chamber 44 and a sixth accommodating chamber 45 are formed on the upper end sealing cover 4. The sixth accommodating chamber 45 is located between the fourth accommodating chamber 43 and the fifth accommodating chamber 44. The depths of the fourth accommodating chamber 43 and the fifth accommodating chamber 44 are the same and greater than the depth of the sixth accommodating chamber 45. A first sub-air inlet 431 is formed in the fourth accommodating chamber 43. The first sub-air inlet 431 is located on the inner wall of the fourth accommodating chamber 43. The first sub-air inlet 431 can be communicated with the air inlet 41. A second sub-air inlet 441 is formed in the fifth accommodating chamber 44. The second sub-air inlet 441 is located on the inner wall of the fifth accommodating chamber 43. On the inner wall of the chamber 44, the second sub-air inlet 441 can be communicated with the air inlet 41, the oxygen outlet 42 is located in the sixth accommodating chamber 45, and a first sealing groove 401 is formed on the upper end sealing cover 4. The first sealing groove 401 is arranged around the periphery of the fourth accommodating chamber 43, the sixth accommodating chamber 45, and the fifth accommodating chamber 44. The shape of the first sealing groove 401 and the arrangement mode on the upper end sealing cover 4 are adapted to the shape of the first end of the first separation tower 1, the shape of the first end of the second separation tower 2, and the shape of the first end of the oxygen storage tank 3. The side walls of the first sealing groove 401 are all protruding from the end of the upper end sealing cover 4. The first end of the first separation tower 1, the first end of the second separation tower 2, and the first end of the oxygen storage tank 3 are respectively inserted and accommodated in the first sealing groove 401 at the corresponding position, the first end of the first separation tower 1 is enclosed in the periphery of the opening of the fourth accommodation chamber 43, the first end of the second separation tower 2 is enclosed in the periphery of the opening of the fifth accommodation chamber 44, and the first end of the oxygen storage tank 3 is enclosed in the periphery of the opening of the sixth accommodation chamber 45. The sixth accommodation chamber 45 can be formed by enclosing part of the side wall of the first sealing groove 401. In this way, the upper end sealing cover 4 can be used to close the first separation tower 1 through the periphery of the fourth accommodation chamber 43 and its opening. The first end of the second separation tower 2 can be sealed through the fifth accommodating chamber 44 and the periphery of its opening, and compressed air can enter the second separation tower 2 through the air inlet 41 and the second sub-air inlet 441. At the same time, the upper end sealing cover 4 can seal the first end of the oxygen storage tank 3 through the sixth accommodating chamber 45 and the periphery of its opening, and the oxygen stored in the oxygen storage tank 3 can be discharged through the oxygen outlet 42 in the sixth accommodating chamber 45 on the upper end sealing cover 4.

[0048] See 3 and Figure 4The shape and arrangement of the second sealing ring 8 are adapted to the first sealing groove 401 on the upper sealing cover 4. The thickness of the second sealing ring 8 is less than the depth of the first sealing groove 401. The second sealing ring 8 is accommodated in the first sealing groove 401. The second sealing ring 8 is located between the first end of the first separation tower 1, the first end of the second separation tower 2, the first end of the oxygen storage tank 3 and the upper sealing cover 4. The second sealing ring 8 can further improve the sealing between the first end of the first separation tower 1, the first end of the second separation tower 2, the first end of the oxygen storage tank 3 and the upper sealing cover 4 to prevent gas leakage.

[0049] See also Figure 4 The upper sealing cover 4 is formed with a through hole 47, see Figure 3 A hollow mounting seat 48 is formed on the end surface of the upper sealing cover 4 away from the oxygen storage tank 3, and the end of the through hole 47 is located in the mounting seat 48. The pressure regulating valve 7 is installed (such as threaded connection) and fixed on the mounting seat 48. The pressure regulating valve 7 is connected with the oxygen storage tank 3 through the through hole 47. The pressure regulating valve 7 can reduce the high-pressure oxygen in the oxygen storage tank 3 to the working pressure required by the user. At the same time, it can ensure that the oxygen has a stable working pressure when it is output.

[0050] See also Figure 1 , Figure 4 and Figure 7 A nitrogen exhaust port 46 is formed on the end surface of the upper sealing cover 4 close to the oxygen storage tank 3, and the nitrogen exhaust port 46 can be communicated with the first sub-gas inlet 431 in the fourth accommodating chamber 43, and the nitrogen exhaust port 46 can also be communicated with the second sub-gas inlet 441 in the fifth accommodating chamber 44. In this way, when the nitrogen adsorbed by the molecular sieve in the first separation tower 1 reaches saturation, the nitrogen in the first separation tower 1 can be released into the atmosphere through the first sub-gas inlet 431 and the nitrogen exhaust port 46 to reduce the pressure of the molecular sieve in the first separation tower 1, thereby restoring its nitrogen adsorption capacity. When the nitrogen adsorbed by the molecular sieve in the second separation tower 2 reaches saturation, the nitrogen in the second separation tower 2 can be released into the atmosphere through the second sub-gas inlet 441 and the nitrogen exhaust port 46 to reduce the pressure of the molecular sieve in the second separation tower 2, thereby restoring its nitrogen adsorption capacity.

[0051] See also Figures 1 to 4 , Figure 7, the two-position five-way valve 9 is installed on the upper end sealing cover 4, the first port of the two-position five-way valve 9 is connected to the air inlet 41, the second port of the two-position five-way valve 9 is connected to the first sub-air inlet 431 in the fourth accommodating chamber 43, the third port of the two-position five-way valve 9 is connected to the second sub-air inlet 441 in the fifth accommodating chamber 44, and the fourth port of the two-position five-way valve 9 is connected to the nitrogen exhaust port 46. In this way, the communication between the air inlet 41 and the first sub-air inlet 431, the communication between the air inlet 41 and the second sub-air inlet 441, and the first The sub-inlet 431 is connected with the nitrogen exhaust port 46, the second sub-inlet 441 is connected with the nitrogen exhaust port 46, and the first sub-inlet 431 is connected with the second sub-inlet 441, so as to orderly realize the first separation tower 1 adsorbing nitrogen (left suction), the first separation tower 1 is connected with the second separation tower 2 to balance the pressure (equal pressure), the second separation tower 2 adsorbs nitrogen (right suction), the first separation tower 1 is connected with the nitrogen exhaust port 46 (desorption), and the second separation tower 2 is connected with the nitrogen exhaust port 46 (desorption). The direction of the airflow can be orderly controlled and switched through the two-position five-way valve 9.

[0052] See also Figure 1 and Figure 2 The second end of the first separation tower 1, the second end of the second separation tower 2, and the second end of the oxygen storage tank 3 are all installed on the lower end sealing cover 5, and the lower end sealing cover 5 can seal and isolate the second end of the first separation tower 1, the second end of the second separation tower 2, and the second end of the oxygen storage tank 3; specifically: refer to Figure 3 and Figure 5The lower end sealing cover 5 is formed with a first accommodating chamber 51, a second accommodating chamber 52, a first oxygen inlet 53, a second oxygen inlet 54 and a third accommodating chamber 55. The third accommodating chamber 55 is located between the first accommodating chamber 51 and the second accommodating chamber 52. The depths of the first accommodating chamber 51 and the second accommodating chamber 52 are the same and greater than the depth of the third accommodating chamber 55. The first oxygen inlet 53 and the second oxygen inlet 54 are located on the end surface of the lower end sealing cover 5. The first oxygen inlet 53 and the second oxygen inlet 54 are located in the third accommodating chamber 55. The first accommodating chamber 51 is formed with a third oxygen inlet 511. The third oxygen inlet 511 is located on the inner wall of the first accommodating chamber 51. The third oxygen inlet 511 is communicated with the first oxygen inlet 53, a fourth oxygen inlet 521 is formed in the second accommodating chamber 52, the fourth oxygen inlet 521 is located on the inner wall of the second accommodating chamber 52, the fourth oxygen inlet 521 is communicated with the second oxygen inlet 54, a second sealing groove 501 is formed on the lower end sealing cover 5, the second sealing groove 501 is arranged around the periphery of the first accommodating chamber 51, the third accommodating chamber 55 and the second accommodating chamber 52, the shape of the second sealing groove 501 and the arrangement mode on the lower end sealing cover 5 are adapted to the shape of the second end of the first separation tower 1, the shape of the second end of the second separation tower 2 and the shape of the second end of the oxygen storage tank 3, and the second sealing groove 501 is arranged on the lower end sealing cover 5. The side walls of the sealing groove 501 are all protruding from the end surface of the lower end sealing cover 5. The second end of the first separation tower 1, the second end of the second separation tower 2, and the second end of the oxygen storage tank 3 are respectively inserted and accommodated in the second sealing groove 501 at the corresponding positions. The second end of the first separation tower 1 is enclosed in the periphery of the opening of the first accommodating chamber 51, the second end of the second separation tower 2 is enclosed in the periphery of the opening of the second accommodating chamber 52, and the second end of the oxygen storage tank 3 is enclosed in the periphery of the opening of the third accommodating chamber 55. The third accommodating chamber 55 can be formed by enclosing part of the side walls of the second sealing groove 501. The second end of the oxygen storage tank 3 is enclosed in the periphery of the first oxygen inlet 53 and the second oxygen inlet 54. In this way, the lower end sealing cover 5 can seal the second end of the first separation tower 1 through the first accommodating chamber 51 and the periphery of its opening, the lower end sealing cover 5 can seal the second end of the second separation tower 2 through the second accommodating chamber 52 and the periphery of its opening, and the lower end sealing cover 5 can seal the second end of the oxygen storage tank 3 through the third accommodating chamber 55 and the periphery of its opening. The oxygen separated in the first separation tower 1 can enter the oxygen storage tank 3 for storage through the third oxygen inlet 511 and the first oxygen inlet 53, and the oxygen separated in the second separation tower 2 can enter the oxygen storage tank 3 for storage through the fourth oxygen inlet 521 and the second oxygen inlet 54.

[0053] See 3 and Figure 4The shape and arrangement of the first sealing ring 6 are adapted to the second sealing groove 501 on the lower sealing cover 5. The thickness of the first sealing ring 6 is less than the depth of the second sealing groove 501. The first sealing ring 6 is accommodated in the second sealing groove 501. The first sealing ring 6 is located between the second end of the first separation tower 1, the second end of the second separation tower 2, the second end of the oxygen storage tank 3 and the lower sealing cover 5. The first sealing ring 6 can further improve the sealing between the second end of the first separation tower 1, the second end of the second separation tower 2, the second end of the oxygen storage tank 3 and the lower sealing cover 5 to prevent gas leakage.

[0054] See also Figure 4 In this embodiment, the two corners of the outer side of the tower wall of the first separation tower 1 are respectively formed with first convex strips 101 distributed along the length direction of the first separation tower 1, and screw holes are respectively formed at both ends of the first convex strips 101; the two corners of the outer side of the tower wall of the second separation tower 2 are respectively formed with second convex strips 201 distributed along the length direction of the second separation tower 2, and screw holes are respectively formed at both ends of the second convex strips 201; the four corners of the outer side of the tank wall of the oxygen storage tank 3 are respectively formed with third convex strips 301 distributed along the length direction of the oxygen storage tank 3, and screw holes are respectively formed at both ends of the third convex strips 301; refer to Figure 7 , eight first mounting through holes 402 are formed on the inner bottom of the first sealing groove 401, wherein the positions of two first mounting through holes 402 are adapted to the screw holes at the ends of the two first convex strips 101 on the first separation tower 1, the positions of two first mounting through holes 402 are adapted to the screw holes at the ends of the two second convex strips 201 on the second separation tower 2, and the positions of four first mounting through holes 402 are adapted to the screw holes at the ends of the four third convex strips 301 on the oxygen storage tank 4; refer to Figure 3, eight second mounting through holes 502 are formed on the inner bottom of the second sealing groove 501, wherein the positions of the two second mounting through holes 502 are adapted to the screw holes at the ends of the two first convex strips 101 on the first separation tower 1, the positions of the two second mounting through holes 502 are adapted to the screw holes at the ends of the two second convex strips 201 on the second separation tower 2, and the positions of the four second mounting through holes 502 are adapted to the screw holes at the ends of the four third convex strips 301 on the oxygen storage tank 4. In this way, eight screws are used to pass through the eight first mounting through holes 402 on the upper end sealing cover 4 and tighten them in the screw holes at the ends of the two first convex strips 101 on the first separation tower 1, the second The screw holes at the ends of the two second convex strips 201 on the separation tower 2 and the screw holes at the ends of the four third convex strips 301 on the oxygen storage tank 3 are used to fix the upper sealing cover 4 to the first separation tower 1, the oxygen storage tank 3 and the second separation tower 2. Eight screws are used to pass through the eight second mounting through holes 502 on the lower sealing cover 5 and tighten them into the screw holes at the ends of the two first convex strips 101 on the first separation tower 1, the screw holes at the ends of the two second convex strips 201 on the second separation tower 2, and the screw holes at the ends of the four third convex strips 301 on the oxygen storage tank 3, so as to fix the lower sealing cover 5 to the first separation tower 1, the oxygen storage tank 3 and the second separation tower 2.

[0055] See also Figures 1 to 7The separation tower and oxygen storage tank of the oxygen concentrator of the present invention are integrated into a structure. The first separation tower 1 and the second separation tower 2 are respectively equipped with molecular sieves. Through the control setting of the two-position five-way valve 9 by the oxygen concentrator, the air inlet 41 is connected with the first sub-air inlet 431 in the fourth accommodating chamber 43, and the air inlet 41 is connected with the second sub-air inlet 441 in the fifth accommodating chamber 44. The compressed gas generated by the compressor in the oxygen concentrator can enter the first separation tower 1 and the second separation tower 2 through the air inlet 41 on the upper sealing cover 4, and the difference in the adsorption capacity of the molecular sieve to nitrogen and oxygen is used to achieve nitrogen and oxygen adsorption. Under the action of pressure, nitrogen is adsorbed by the molecular sieve, and the oxygen separated in the first separation tower 1 enters the oxygen storage tank 3 through the third oxygen inlet 511 and the first oxygen inlet 53 for storage, and the oxygen separated in the second separation tower 2 can enter the oxygen storage tank 3 through the fourth oxygen inlet 521 and the second oxygen inlet 54 for storage, and the oxygen in the oxygen storage tank 3 can be discharged through the oxygen outlet 42 to be delivered to the user, and the pressure regulating valve 7 can reduce the high-pressure oxygen in the oxygen storage tank 3 to the working pressure required by the user, and at the same time, it can ensure that the oxygen has a stable working pressure when it is output; when the first When the nitrogen adsorbed by the molecular sieve in the separation tower 1 reaches saturation, the first sub-inlet 431 in the fourth accommodating chamber 43 is connected to the nitrogen exhaust port 46 through the control setting of the two-position five-way valve 9 by the oxygen generator, and the nitrogen in the first separation tower 1 can be released into the atmosphere through the first sub-inlet 431 and the nitrogen exhaust port 46 to reduce the pressure of the molecular sieve in the first separation tower 1, thereby restoring its nitrogen adsorption capacity. When the nitrogen adsorbed by the molecular sieve in the second separation tower 2 reaches saturation, the second sub-inlet 441 in the fifth accommodating chamber 44 is connected to the nitrogen exhaust port 46 through the control setting of the two-position five-way valve 9 by the oxygen generator. The nitrogen in the second separation tower 2 can be released into the atmosphere through the second sub-air inlet 441 and the nitrogen exhaust port 46 to reduce the pressure of the molecular sieve in the second separation tower 2, thereby restoring its adsorption capacity for nitrogen. Through the control setting of the two-position five-way valve 9 by the oxygen generator, the first separation tower 1 can adsorb nitrogen (left suction), the first separation tower 1 is connected with the second separation tower 2 to balance the pressure (equal pressure), the second separation tower 2 adsorbs nitrogen (right suction), the first separation tower 1 is connected with the nitrogen exhaust port 46 (desorption), and the second separation tower 2 is connected with the nitrogen exhaust port 46 (desorption).The separation tower and oxygen storage tank integrated structure of the present invention utilizes the redundant space size between the first separation tower 1 and the second separation tower 2 to form the oxygen storage tank 3, and utilizes the upper end sealing cover 4 and the lower end sealing cover 5 to seal and isolate the first separation tower 1, the second separation tower 2 and the oxygen storage tank 3. Since the tower wall of the first separation tower 1, the tower wall of the second separation tower 2 and the tank wall of the oxygen storage tank 3 are integrally formed, the original three components of the two separation tower tubes and the oxygen storage tank can be combined into one component, which is simple to assemble, has a reliable sealing effect, and has a simple structure. It can reduce pipeline connections, reduce material costs, and effectively utilize space. In addition, since the tower wall of the first separation tower 1, the tower wall of the second separation tower 2, and the tank wall of the oxygen storage tank 3 are integrally formed, it can reduce assembly, simplify assembly, reduce defective finished products caused by defects in pipelines, joints and components themselves, and improve the yield rate. Moreover, while reducing materials, it effectively reduces the noise of the whole machine. Through testing, the noise of the whole machine is effectively reduced by more than 3dBA.

[0056] The above are only some embodiments of the present invention, which are intended to illustrate the technical means of the present invention, but not to limit the technical scope of the present invention. Those skilled in the art can make obvious improvements to the present invention in combination with existing common knowledge, which all fall within the protection scope of the present invention.

Claims

1. An integrated structure of a separation tower and an oxygen storage tank of an oxygen concentrator, characterized in that: include: a first separation tower; a second separation tower; An oxygen storage tank is provided between the first separation tower and the second separation tower. The tower wall of the first separation tower, the tower wall of the second separation tower, and the tank wall of the oxygen storage tank are integrally formed. The oxygen separated in the first separation tower and the oxygen separated in the second separation tower can enter the oxygen storage tank. an upper end sealing cover, wherein the first end of the first separation tower, the first end of the second separation tower, and the first end of the oxygen storage tank are all arranged on the upper end sealing cover, and the upper end sealing cover is provided with an air inlet and an oxygen outlet; and The second end of the first separation tower, the second end of the second separation tower, and the second end of the oxygen storage tank are all arranged on the lower end sealing cover.

2. The integrated structure of separation tower and oxygen storage tank according to claim 1, characterized in that: The lower end sealing cover is provided with a first accommodating chamber, a second accommodating chamber, a first oxygen inlet and a second oxygen inlet, the first accommodating chamber is provided with a third oxygen inlet connected to the first oxygen inlet, the second accommodating chamber is provided with a fourth oxygen inlet connected to the second oxygen inlet, the second end of the first separation tower is enclosed around the periphery of the opening of the first accommodating chamber, the second end of the second separation tower is enclosed around the periphery of the opening of the second accommodating chamber, and the second end of the oxygen storage tank is enclosed around the periphery of the first oxygen inlet and the second oxygen inlet.

3. The integrated structure of separation tower and oxygen storage tank according to claim 2, characterized in that: The lower end sealing cover is provided with a third accommodating cavity, the second end of the oxygen storage tank is enclosed at the periphery of the opening of the third accommodating cavity, and the first oxygen inlet and the second oxygen inlet are located in the third accommodating cavity.

4. The integrated structure of separation tower and oxygen storage tank according to claim 1, characterized in that: It also includes a first sealing ring, which is accommodated between the second end of the first separation tower, the second end of the second separation tower, the second end of the oxygen storage tank and the lower end sealing cover.

5. The integrated structure of separation tower and oxygen storage tank according to claim 1, characterized in that: The upper end sealing cover is provided with a fourth accommodating chamber and a fifth accommodating chamber, the fourth accommodating chamber is provided with a first sub-air inlet that can be communicated with the air inlet, the fifth accommodating chamber is provided with a second sub-air inlet that can be communicated with the air inlet, the first end of the first separation tower is enclosed around the opening of the fourth accommodating chamber, the first end of the second separation tower is enclosed around the opening of the fifth accommodating chamber, and the first end of the oxygen storage tank is enclosed around the oxygen outlet.

6. The integrated structure of separation tower and oxygen storage tank according to claim 5, characterized in that: The upper sealing cover is provided with a sixth accommodating cavity, the first end of the oxygen storage tank is enclosed at the periphery of the opening of the sixth accommodating cavity, and the oxygen outlet is located in the sixth accommodating cavity.

7. The integrated structure of separation tower and oxygen storage tank according to claim 1, characterized in that: It also includes a pressure regulating valve, which is arranged on the upper end sealing cover and is connected to the oxygen storage tank.

8. The integrated structure of separation tower and oxygen storage tank according to claim 1, characterized in that: It also includes a second sealing ring, which is accommodated between the first end of the first separation tower, the first end of the second separation tower, the first end of the oxygen storage tank and the upper end sealing cover.

9. The integrated structure of separation tower and oxygen storage tank according to claim 5 or 6, characterized in that: The upper sealing cover is provided with a nitrogen exhaust port, which can be communicated with the first sub-air inlet and the second sub-air inlet.

10. The integrated structure of separation tower and oxygen storage tank according to claim 9, characterized in that: It also includes a two-position five-way valve, wherein the first port of the two-position five-way valve is connected to the air inlet, the second port of the two-position five-way valve is connected to the first sub-air inlet, the third port of the two-position five-way valve is connected to the second sub-air inlet, and the fourth port of the two-position five-way valve is connected to the nitrogen exhaust port.

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