Separating tower and oxygen storage tank integrated structure of oxygen generator

Abstract

The separating tower and oxygen storage tank integrated structure comprises a first separating tower, a second separating 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 separating tower and the second separating tower, and the tower wall of the first separating tower, the tower wall of the second separating 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. According to the utility model, the oxygen storage tank is made by utilizing the size of the redundant space between the first separation tower and the second separation tower, and the upper end sealing cover and the lower end sealing cover are used for sealing and isolating, so that the original two separation tower pipes and the oxygen storage tank can be combined into one part, the assembly is simple, the sealing effect is reliable, the pipeline connection can be reduced, and the cost is reduced. According to the utility model, the structure is simple, the material cost is reduced, the space is effectively utilized, in addition, poor finished products caused by poor pipelines, joints and parts can be reduced, the yield is improved, and the noise of the whole machine is effectively reduced while the materials are reduced.

Description

Technical Field

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

[0002] Oxygen generators are widely used in households, hospitals, sanatoriums, schools, hotels, sports venues, bars, oxygen bars, and high-altitude military stations. With the increasing awareness of health among people, the market for household oxygen generators has gradually emerged and become an important device for health care. As a household medical device, its market demand is continuously growing with the pursuit of a healthy life by people.

[0003] The separation tower is the core component of an oxygen generator for air separation. It is filled with molecular sieves inside, and the separation is achieved by utilizing the difference in the adsorption capacities of molecular sieves for nitrogen and oxygen. Under the action of pressure, nitrogen is adsorbed by the molecular sieves, while oxygen passes through the molecular sieves 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 the user.

[0004] In the existing market, the separation tower and the oxygen storage tank of an oxygen generator are both independent components, and they are both independent plastic and aluminum parts in the oxygen generation system. The oxygen separated in the separation tower is connected to the oxygen storage tank through a pipeline at the oxygen outlet, and the high-pressure gas supplied to the separation tower by the oxygen generation valve is connected to separation tower A and separation tower B through pipelines. There are many and complex pipelines, and the sound insulation effect of pipeline materials is generally poor, and the occupied space is also large.

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

[0006] 1) There are many connecting pipelines, resulting in an increase in potential hazards, as well as an increase in material costs, processing costs, and assembly labor costs;

[0007] 2) With many pipelines, the neatness is poor and it is not beautiful enough;

[0008] 3) Most of the pipeline materials are silica gel, and the sound insulation effect is poor. Summary of the Utility Model

[0009] The purpose of the utility model is to overcome the deficiencies of the above-mentioned existing technologies and provide an integrated structure of a separation tower and an oxygen storage tank of an oxygen generator.

[0010] According to one aspect of the utility model, an integrated structure of a separation tower and an oxygen storage tank of an oxygen generator is provided, including:

[0011] A first separation tower;

[0012] A second separation tower;

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

[0014] Upper end sealing cover, the upper end sealing cover is provided with a first sealing groove, the first ends of the first separation tower, the second separation tower and the oxygen storage tank are respectively inserted into the first sealing groove, and the shape of the first sealing groove is adapted to the shapes of the first ends of the first separation tower, the second separation tower and the oxygen storage tank. The upper end sealing cover is provided with an air inlet and an oxygen outlet; and

[0015] Lower end sealing cover, the lower end sealing cover is provided with a second sealing groove, the second ends of the first separation tower, the second separation tower and the oxygen storage tank are respectively inserted into the second sealing groove, and the shape of the second sealing groove is adapted to the shapes of the second ends of the first separation tower, the second separation tower and the oxygen storage tank.

[0016] The integrated structure of the separation tower and the oxygen storage tank of the present utility model utilizes the extra space size between the first separation tower and the second separation tower to make an oxygen storage tank, and uses the upper end sealing cover and the lower end sealing cover for sealing isolation. Since the tower walls of the first separation tower, the tower walls of the second separation tower and the tank wall of the oxygen storage tank are integrally formed, the original three components of two separation tower tubes and an oxygen storage tank can be combined into one component, and the assembly is simple. The first sealing groove on the upper end sealing cover and the second sealing groove on the lower end sealing cover can ensure the sealing effect at both ends of the first separation tower, both ends of the second separation tower and both ends of the oxygen storage tank. Molecular sieves are respectively installed inside the first separation tower and the second separation tower. Using the extra space on the upper sealing cover, compressed gas enters the first separation tower and the second separation tower through the air inlet on the upper sealing cover, and the oxygen stored in the oxygen storage tank can be discharged from the oxygen outlet on the upper end sealing cover; the integrated structure of the separation tower and the oxygen storage tank of the present utility model has a simple structure, can reduce pipeline connection, reduce material cost, and effectively utilize space. In addition, since the tower walls of the first separation tower, the tower walls of the second separation tower and the tank wall of the oxygen storage tank are integrally formed, assembly can be reduced, the assembly is simplified, the defective products caused by poor pipelines, joints and the components themselves are reduced, and the yield is improved. Moreover, while reducing materials, the overall machine noise is effectively reduced. Through testing, the overall machine noise is effectively reduced by more than 3 dBA.

[0017] Furthermore, the lower end sealing cover is provided with a first accommodation cavity, a second accommodation cavity, a first oxygen inlet, and a second oxygen inlet. A third oxygen inlet communicating with the first oxygen inlet is provided in the first accommodation cavity, and a fourth oxygen inlet communicating with the second oxygen inlet is provided in the second accommodation cavity. The second end of the first separation tower is surrounded by the periphery of the opening of the first accommodation cavity, the second end of the second separation tower is surrounded by the periphery of the opening of the second accommodation cavity, and the second end of the oxygen storage tank is surrounded by the periphery of 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 accommodation cavity and the periphery of its opening. The oxygen separated in the first separation tower can enter the oxygen storage tank through the third oxygen inlet and the first oxygen inlet for storage. The lower end sealing cover can seal the second end of the second separation tower through the second accommodation cavity and the periphery of its opening. The oxygen separated in the second separation tower can enter the oxygen storage tank through the fourth oxygen inlet and the second oxygen inlet for storage. The oxygen stored in the oxygen storage tank can be discharged through the oxygen outlet on the upper end sealing cover.

[0019] Furthermore, the lower end sealing cover is provided with a third accommodation cavity. The second end of the oxygen storage tank is surrounded by the periphery of the opening of the third accommodation cavity. The first oxygen inlet and the second oxygen inlet are located in the third accommodation cavity. The second sealing groove is annularly arranged around the first accommodation cavity, the third accommodation cavity, and the second accommodation cavity.

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

[0021] Furthermore, a first sealing ring is further included. The first sealing ring is accommodated in the second sealing groove and is located 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, preventing gas leakage.

[0023] Furthermore, the upper end sealing cover is provided with a fourth accommodation cavity and a fifth accommodation cavity. A first sub-inlet communicating with the inlet is provided in the fourth accommodation cavity, and a second sub-inlet communicating with the inlet is provided in the fifth accommodation cavity. The first end of the first separation tower is surrounded by the periphery of the opening of the fourth accommodation cavity, the first end of the second separation tower is surrounded by the periphery of the opening of the fifth accommodation cavity, and the first end of the oxygen storage tank is surrounded by the periphery of the oxygen outlet.

[0024] Therefore, the upper sealing cover can seal the first end of the first separation tower through the periphery of the fourth accommodating cavity and its opening. 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 periphery of the fifth accommodating cavity and its opening. 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 cavity is provided on the upper sealing cover. The first end of the oxygen storage tank is enclosed outside the periphery of the opening of the sixth accommodating cavity. The oxygen outlet is located in the sixth accommodating cavity. The first sealing groove is annularly arranged outside the fourth accommodating cavity, the sixth accommodating cavity, and the fifth accommodating cavity.

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

[0027] Furthermore, a pressure regulating valve is further included. The pressure regulating valve is arranged on the upper sealing cover and is communicated with 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. At the same time, it can ensure that the oxygen has a stable working pressure during output.

[0029] Furthermore, a second sealing ring is further included. The second sealing ring is accommodated in the first sealing groove and is located 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.

[0030] Therefore, the second sealing ring can further improve the sealing performance 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, and prevent gas leakage.

[0031] Furthermore, a nitrogen discharge port is provided on the upper sealing cover. The nitrogen discharge port can be communicated with the first sub-air inlet and 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-inlet and the nitrogen discharge 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-inlet and the nitrogen discharge 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. The first port of the two-position five-way valve is connected to the air inlet, the second port is connected to the first sub-inlet, the third port is connected to the second sub-inlet, and the fourth port is connected to the nitrogen discharge port.

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

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

[0036] Figure 2 is Figure 1 a schematic structural diagram of another perspective of the integrated structure of the separation tower and the oxygen storage tank shown;

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

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

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

[0040] Figure 6 is Figure 3 a schematic structural diagram 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 structural schematic diagram of the upper sealing cover in the integrated structure of the separation tower and the oxygen storage tank shown Specific embodiments

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

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more; it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, an electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components

[0044] Refer to Figures 1 to 7 , an integrated structure of a separation tower and an oxygen storage tank of an oxygen generator 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] Refer to Figure 3 and Figure 6, the oxygen storage tank 3 is located between the first separation tower 1 and the second separation tower 2. Molecular sieves are respectively installed inside the first separation tower 1 and the second separation tower 2. The separation is achieved by utilizing the difference in the adsorption capacity of nitrogen and oxygen by the molecular sieves. Under pressure, nitrogen will be adsorbed by the molecular sieve, while oxygen will pass through the molecular sieve and be separated out; the tower walls of the first separation tower 1, the tower walls 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, by using the extra space size between the first separation tower 1 and the second separation tower 2, an oxygen storage tank 3 for storing oxygen can be made, combining the original three components of two separation tower tubes and an oxygen storage tank into one component, with simple assembly. The tower walls of the first separation tower 1, the tower walls 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 an oxygen storage tank 3 of the required size. The tower walls of the first separation tower 1, the tower walls of the second separation tower 2, and the tank wall of the oxygen storage tank 3 as a whole can be processed and produced by die extrusion, and the required length can be cut according to requirements.

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

[0047] Refer to Figure 3 , the upper end of the first separation tower 1 is the first end, the lower end is the second end, the upper end of the second separation tower 2 is the first end, 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. Refer to Figure 1 and Figure 2 , the first ends of the first separation tower 1, the second separation tower 2, and the oxygen storage tank 3 are all installed on the upper end sealing cover 4. The upper end sealing cover 4 can seal and isolate the first ends of the first separation tower 1, the second separation tower 2, and the oxygen storage tank 3; specifically: Refer to Figure 4 and Figure 7, a fourth accommodation cavity 43, a fifth accommodation cavity 44 and a sixth accommodation cavity 45 are formed on the upper end sealing cover 4. The sixth accommodation cavity 45 is located between the fourth accommodation cavity 43 and the fifth accommodation cavity 44. The fourth accommodation cavity 43 and the fifth accommodation cavity 44 have the same depth and are deeper than the sixth accommodation cavity 45. A first sub-inlet 431 is formed in the fourth accommodation cavity 43. The first sub-inlet 431 is located on the inner wall of the fourth accommodation cavity 43 and can communicate with the inlet 41. A second sub-inlet 441 is formed in the fifth accommodation cavity 44. The second sub-inlet 441 is located on the inner wall of the fifth accommodation cavity 44 and can communicate with the inlet 41. The oxygen outlet 42 is located in the sixth accommodation cavity 45. A first sealing groove 401 is formed on the upper end sealing cover 4. The first sealing groove 401 is annularly arranged around the peripheries of the fourth accommodation cavity 43, the sixth accommodation cavity 45 and the fifth accommodation cavity 44. The shape of the first sealing groove 401 and its arrangement on the upper end sealing cover 4 are adapted to the shapes of the first ends of the first separation tower 1, the first ends of the second separation tower 2 and the first ends of the oxygen storage tank 3. The side walls of the first sealing groove 401 protrude from the end face of the upper end sealing cover 4. The first ends of the first separation tower 1, the first ends of the second separation tower 2 and the first ends of the oxygen storage tank 3 are respectively inserted and accommodated in the first sealing grooves 401 at corresponding positions. The first end of the first separation tower 1 surrounds the periphery of the opening of the fourth accommodation cavity 43. The first end of the second separation tower 2 surrounds the periphery of the opening of the fifth accommodation cavity 44. The first end of the oxygen storage tank 3 surrounds the periphery of the opening of the sixth accommodation cavity 45. The sixth accommodation cavity 45 can be formed by enclosing with some side walls of the first sealing groove 401. In this way, the upper end sealing cover 4 can seal the first end of the first separation tower 1 through the fourth accommodation cavity 43 and the periphery of its opening. Compressed air can enter the first separation tower 1 through the inlet 41 and the first sub-inlet 431. The upper end sealing cover 4 can seal the first end of the second separation tower 2 through the fifth accommodation cavity 44 and the periphery of its opening. Compressed air can enter the second separation tower 2 through the inlet 41 and the second sub-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 accommodation cavity 45 and the periphery of its opening. The oxygen stored in the oxygen storage tank 3 can be discharged through the oxygen outlet 42 in the sixth accommodation cavity 45 on the upper end sealing cover 4.

[0048] Refer to 3 and Figure 4, the 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 performance 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, and prevent gas leakage.

[0049] Refer to Figure 4 , a through hole 47 is formed on the upper sealing cover 4. Refer to Figure 3 , a hollow mounting seat 48 is formed on the end face of the upper sealing cover 4 away from the oxygen storage tank 3. The end of the through hole 47 is located in the mounting seat 48. The pressure regulating valve 7 is installed (such as by threaded connection) and fixed on the mounting seat 48. The pressure regulating valve 7 is communicated 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 output.

[0050] Refer to Figure 1 , Figure 4 and Figure 7 , a nitrogen discharge port 46 is formed on the end face of the upper sealing cover 4 close to the oxygen storage tank 3. The nitrogen discharge port 46 can be communicated with the first sub-inlet port 431 in the fourth accommodation cavity 43, and the nitrogen discharge port 46 can also be communicated with the second sub-inlet port 441 in the fifth accommodation cavity 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 to the atmosphere through the first sub-inlet port 431 and the nitrogen discharge port 46 to reduce the pressure of the molecular sieve in the first separation tower 1, so as to restore 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 to the atmosphere through the second sub-inlet port 441 and the nitrogen discharge port 46 to reduce the pressure of the molecular sieve in the second separation tower 2, so as to restore its nitrogen adsorption capacity.

[0051] Refer to Figures 1 to 4 , Figure 7, a 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 communicated with the air inlet 41, the second port of the two-position five-way valve 9 is communicated with the first sub-air inlet 431 in the fourth accommodating cavity 43, the third port of the two-position five-way valve 9 is communicated with the second sub-air inlet 441 in the fifth accommodating cavity 44, and the fourth port of the two-position five-way valve 9 is communicated with the nitrogen discharge port 46. In this way, the two-position five-way valve 9 can automatically control 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, the communication between the first sub-air inlet 431 and the nitrogen discharge port 46, the communication between the second sub-air inlet 441 and the nitrogen discharge port 46, and the communication between the first sub-air inlet 431 and the second sub-air inlet 441, so as to orderly realize the adsorption of nitrogen by the first separation tower 1 (left adsorption), the communication between the first separation tower 1 and the second separation tower 2 to equalize the pressure (pressure equalization), the adsorption of nitrogen by the second separation tower 2 (right adsorption), the communication between the first separation tower 1 and the nitrogen discharge port 46 (desorption), the communication between the second separation tower 2 and the nitrogen discharge port 46 (desorption). The two-position five-way valve 9 can orderly control and switch the direction of the air flow.

[0052] Refer to Figure 1 and Figure 2 , the second ends of the first separation tower 1, the second separation tower 2, and the oxygen storage tank 3 are all installed on the lower end sealing cover 5, and the lower end sealing cover 5 can hermetically isolate the second ends of the first separation tower 1, the second separation tower 2, and the oxygen storage tank 3; specifically: Refer to Figure 3 and Figure 5, a first accommodation cavity 51, a second accommodation cavity 52, a first oxygen inlet 53, a second oxygen inlet 54, and a third accommodation cavity 55 are formed on the lower end sealing cover 5. The third accommodation cavity 55 is located between the first accommodation cavity 51 and the second accommodation cavity 52. The first accommodation cavity 51 and the second accommodation cavity 52 have the same depth and are greater than the depth of the third accommodation cavity 55. The first oxygen inlet 53 and the second oxygen inlet 54 are located on the end face of the lower end sealing cover 5, and the first oxygen inlet 53 and the second oxygen inlet 54 are located in the third accommodation cavity 55. A third oxygen inlet 511 is formed in the first accommodation cavity 51, and the third oxygen inlet 511 is located on the inner wall of the first accommodation cavity 51. The third oxygen inlet 511 is communicated with the first oxygen inlet 53. A fourth oxygen inlet 521 is formed in the second accommodation cavity 52, and the fourth oxygen inlet 521 is located on the inner wall of the second accommodation cavity 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, and the second sealing groove 501 is annularly arranged around the peripheries of the first accommodation cavity 51, the third accommodation cavity 55, and the second accommodation cavity 52. The shape of the second sealing groove 501 and its arrangement on the lower end sealing cover 5 are adapted to the shapes of the second ends of the first separation tower 1, the second ends of the second separation tower 2, and the second ends of the oxygen storage tank 3. The side walls of the second sealing groove 501 protrude from the end face of the lower end sealing cover 5. The second ends of the first separation tower 1, the second ends of the second separation tower 2, and the second ends of the oxygen storage tank 3 are respectively inserted and accommodated in the second sealing groove 501 at corresponding positions. The second end of the first separation tower 1 surrounds the periphery of the opening of the first accommodation cavity 51, the second end of the second separation tower 2 surrounds the periphery of the opening of the second accommodation cavity 52, and the second end of the oxygen storage tank 3 surrounds the periphery of the opening of the third accommodation cavity 55. The third accommodation cavity 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 surrounds the peripheries 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 accommodation cavity 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 accommodation cavity 52 and the periphery of its opening. The lower end sealing cover 5 can seal the second end of the oxygen storage tank 3 through the third accommodation cavity 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. 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] Refer to 3 and Figure 4, the shape and arrangement of the first sealing ring 6 are adapted to the second sealing groove 501 on the lower end 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 ends of the first separation tower 1, the second separation tower 2, the oxygen storage tank 3 and the lower end sealing cover 5. The first sealing ring 6 can further improve the sealing performance between the second ends of the first separation tower 1, the second separation tower 2, the oxygen storage tank 3 and the lower end sealing cover 5, and prevent gas leakage.

[0054] Refer to Figure 4 , in this embodiment, first convex strips 101 distributed along the length direction of the first separation tower 1 are formed at two corner positions on the outer side of the tower wall of the first separation tower 1. Screw holes are formed at both ends of the first convex strip 101. Second convex strips 201 distributed along the length direction of the second separation tower 2 are formed at two corner positions on the outer side of the tower wall of the second separation tower 2. Screw holes are formed at both ends of the second convex strip 201. Third convex strips 301 distributed along the length direction of the oxygen storage tank 3 are formed at four corner positions on the outer side of the tank wall of the oxygen storage tank 3. Screw holes are formed at both ends of the third convex strip 301; Refer to Figure 7 , eight first installation through holes 402 are formed on the inner bottom of the first sealing groove 401. Among them, the positions of two first installation 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 installation 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. The positions of four first installation 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. Among them, the positions of two second mounting through-holes 502 are adapted to the screw holes at the ends of the two first ridges 101 on the first separation tower 1, the positions of two second mounting through-holes 502 are adapted to the screw holes at the ends of the two second ridges 201 on the second separation tower 2, and the positions of four second mounting through-holes 502 are adapted to the screw holes at the ends of the four third ridges 301 on the oxygen storage tank 4. In this way, eight screws are respectively passed through the eight first mounting through-holes 402 on the upper sealing cover 4 and tightened into the screw holes at the ends of the two first ridges 101 on the first separation tower 1, the screw holes at the ends of the two second ridges 201 on the second separation tower 2, and the screw holes at the ends of the four third ridges 301 on the oxygen storage tank 3, so as to fix the upper sealing cover 4 to the first separation tower 1, the oxygen storage tank 3, and the second separation tower 2 together. Eight screws are respectively passed through the eight second mounting through-holes 502 on the lower sealing cover 5 and tightened into the screw holes at the ends of the two first ridges 101 on the first separation tower 1, the screw holes at the ends of the two second ridges 201 on the second separation tower 2, and the screw holes at the ends of the four third ridges 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 together.

[0055] Refer to Figures 1 to 7, the separation tower and the oxygen storage tank of the oxygen generator of the present utility model are of an integrated structure. Molecular sieves are respectively installed inside the first separation tower 1 and the second separation tower 2. Through the control setting of the two-position five-way valve 9 by the oxygen generator, the air inlet 41 is communicated with the first sub-air inlet 431 in the fourth accommodation cavity 43, and the air inlet 41 is communicated with the second sub-air inlet 441 in the fifth accommodation cavity 44. The compressed gas generated by the compressor in the oxygen generator can enter the first separation tower 1 and the second separation tower 2 through the air inlet 41 on the upper sealing cover 4. The separation of nitrogen and oxygen is achieved by utilizing the difference in the adsorption capacities of the molecular sieve for nitrogen and oxygen. Under the action of pressure, nitrogen is adsorbed by the molecular sieve. The oxygen separated from 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. The oxygen separated from 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. The oxygen in the oxygen storage tank 3 can be discharged through the oxygen outlet 42 to be delivered to the user. 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 during output; when the nitrogen adsorbed by the molecular sieve in the first separation tower 1 reaches saturation, through the control setting of the two-position five-way valve 9 by the oxygen generator, the first sub-air inlet 431 in the fourth accommodation cavity 43 is communicated with the nitrogen discharge port 46, and the nitrogen in the first separation tower 1 can be released to the atmosphere through the first sub-air inlet 431 and the nitrogen discharge port 46 to reduce the pressure of the molecular sieve in the first separation tower 1, thereby restoring its adsorption capacity for nitrogen. When the nitrogen adsorbed by the molecular sieve in the second separation tower 2 reaches saturation, through the control setting of the two-position five-way valve 9 by the oxygen generator, the second sub-air inlet 441 in the fifth accommodation cavity 44 is communicated with the nitrogen discharge port 46, and the nitrogen in the second separation tower 2 can be released to the atmosphere through the second sub-air inlet 441 and the nitrogen discharge 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, it is possible to orderly achieve the first separation tower 1 adsorbing nitrogen (left adsorption), the first separation tower 1 and the second separation tower 2 being communicated to equalize the pressure (pressure equalization), the second separation tower 2 adsorbing nitrogen (right adsorption), the first separation tower 1 being communicated with the nitrogen discharge port 46 (desorption), and the second separation tower 2 being communicated with the nitrogen discharge port 46 (desorption).The integrated structure of the separation tower and the oxygen storage tank of the present utility model utilizes the extra space dimension between the first separation tower 1 and the second separation tower 2 to form the oxygen storage tank 3. The upper sealing cover 4 and the lower sealing cover 5 are used to seal and isolate the first separation tower 1, the second separation tower 2 and the oxygen storage tank 3. Since the tower walls of the first separation tower 1, the tower walls 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 pipes and the oxygen storage tank can be combined into one component, with simple assembly, reliable sealing effect, and concise structure. It can reduce pipeline connections, reduce material costs, and effectively utilize space. In addition, since the tower walls of the first separation tower 1, the tower walls of the second separation tower 2 and the tank wall of the oxygen storage tank 3 are integrally formed, the assembly can be reduced, the assembly can be simplified, and the defective products caused by poor pipelines, joints and the components themselves can be reduced, 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 3 dBA.

[0056] The above are only some embodiments of the present utility model, aiming to illustrate the technical means of the present utility model, rather than limiting the technical scope of the present utility model. Obvious improvements made by those skilled in the art in combination with the existing common knowledge fall within the protection scope of the present utility model.

Claims

1. An integrated structure of a separation tower and an oxygen storage tank of an oxygen concentrator, characterized in that: Comprising: A first separation tower; A second separation tower; An oxygen storage tank, which 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; An upper sealing cover, on which a first sealing groove is provided. The first ends of the first separation tower, the second separation tower, and the oxygen storage tank are respectively inserted into the first sealing groove. The shape of the first sealing groove is adapted to the shapes of the first ends of the first separation tower, the second separation tower, and the oxygen storage tank. An air inlet and an oxygen outlet are provided on the upper sealing cover; and A lower sealing cover, on which a second sealing groove is provided. The second ends of the first separation tower, the second separation tower, and the oxygen storage tank are respectively inserted into the second sealing groove. The shape of the second sealing groove is adapted to the shapes of the second ends of the first separation tower, the second separation tower, and the oxygen storage tank.

2. The integrated structure of the separation tower and the oxygen storage tank according to claim 1, characterized in that The lower sealing cover is provided with a first accommodation cavity, a second accommodation cavity, a first oxygen inlet, and a second oxygen inlet. A third oxygen inlet communicating with the first oxygen inlet is provided in the first accommodation cavity, and a fourth oxygen inlet communicating with the second oxygen inlet is provided in the second accommodation cavity. The second end of the first separation tower surrounds the periphery of the opening of the first accommodation cavity, the second end of the second separation tower surrounds the periphery of the opening of the second accommodation cavity, and the second end of the oxygen storage tank surrounds the periphery of the first oxygen inlet and the second oxygen inlet.

3. The integrated structure of the separation tower and the oxygen storage tank according to claim 2, characterized in that The lower sealing cover is provided with a third accommodation cavity. The second end of the oxygen storage tank surrounds the periphery of the opening of the third accommodation cavity. The first oxygen inlet and the second oxygen inlet are located in the third accommodation cavity. The second sealing groove is annularly arranged around the first accommodation cavity, the third accommodation cavity, and the second accommodation cavity.

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

5. The integrated structure of a separation tower and an oxygen storage tank according to claim 1, wherein The upper sealing cover is provided with a fourth accommodation cavity and a fifth accommodation cavity. A first sub-air inlet communicating with the air inlet is provided in the fourth accommodation cavity, and a second sub-air inlet communicating with the air inlet is provided in the fifth accommodation cavity. The first end of the first separation tower surrounds the periphery of the opening of the fourth accommodation cavity, the first end of the second separation tower surrounds the periphery of the opening of the fifth accommodation cavity, and the first end of the oxygen storage tank surrounds the periphery of 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 accommodation cavity. The first end of the oxygen storage tank surrounds the periphery of the opening of the sixth accommodation cavity. The oxygen outlet is located in the sixth accommodation cavity. The first sealing groove is annularly arranged around the fourth accommodation cavity, the sixth accommodation cavity, and the fifth accommodation cavity.

7. The integrated structure of the separation tower and the oxygen storage tank according to claim 1, wherein It further includes a pressure regulating valve, which is provided on the upper sealing cover and is communicated with the oxygen storage tank.

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

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

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

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