Filter device and diffused oxygen and nitrogen separation device using the same

Abstract

The present invention relates to a filter device and a diffuse oxygen-nitrogen separation device using the same, comprising an air intake side component installed on the air intake side of an inner chassis and a filter screen sleeved on the air intake side component, the air intake side component comprising an air intake hood and an air intake side plate, the air intake hood comprising an integrally formed lower air intake frame and an upper air intake frame, the lower air intake frame being provided with a first frame, the first frame being provided with a positioning boss, support ribs, and a first support column; the upper air intake frame being provided with a second frame, and an air intake space for inserting an external air intake connector being formed between the second frames. This solution solves the problems existing in the prior art of complex filter device structure, complex production and assembly, high cost, and time-consuming and labor-intensive replacement, so as to provide a filter device and a diffuse oxygen-nitrogen separation device using the same that is ingenious in structure, simple in production, and convenient and labor-saving to replace.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a filter device and a diffuse oxygen-nitrogen separation device using the same. Background Art

[0002] An oxygen-nitrogen separation device is a device that separates nitrogen and oxygen in the air. It is divided into a nitrogen generator and an oxygen generator. The oxygen generator is a device that can provide high-concentration oxygen for human breathing. The oxygen generator is used for oxygen therapy for people with respiratory diseases, cardiovascular diseases, cerebrovascular diseases, altitude sickness and altitude diseases, for the middle-aged and elderly weak people, students who overuse their brains, pregnant women, and people who work and live in an oxygen-deficient environment. Because breathing more pure oxygen can promote blood circulation, refresh the mind, eliminate fatigue, and effectively improve work efficiency, it is also a good lifestyle to have an oxygen generator in daily life or in the workplace for easy use at any time.

[0003] The oxygen generator is mainly composed of a filter device, a compressor, a switching valve, an exhaust silencer, a molecular sieve adsorption tower, a storage device, a flow control device, a control system, and a shell. As the air intake component of the oxygen generator, the filter device removes moisture and solid particles in the air in advance, which can prevent impurities from entering the compressor cylinder and damaging the cylinder cup. It can also prevent solid particle impurities in the air from entering the switching valve, affecting the normal operation of the switching valve diaphragm, reducing the oxygen production efficiency, and directly affecting the life of the oxygen generator system and the physical and chemical indicators of the product gas.

[0004] At present, the oxygen concentrator air intake filter devices on the market have complex structures, complex production and assembly, and high costs. Some of them need to be replaced by users themselves, which also increases the cost of users. For example, the Chinese patent CN204952483, which was announced on January 13, 2016, has an application number of 201520666252.8 and a patent name of "A Medical Oxygen Concentrator Air Filter" (hereinafter referred to as "Comparative Document 1"), and a medical oxygen concentrator air filter disclosed in Comparative Document 1, with reference to the specification and drawings of Comparative Document 1, the left end of the cylinder A in Comparative Document 1 is connected to the air intake pipe through the fastening nut A, and a cylinder cover is set at the right end of the cylinder A, and the cylinder A is inside An annular sieve plate and a circular baffle are respectively provided, the circular baffle is arranged inside the annular sieve plate and cooperates with the circular baffle, a cylinder B is arranged inside the cylinder A, the left end of the cylinder B is connected to and cooperates with the circular baffle, the left end of the cylinder C extends into the cylinder B, the right end of the cylinder C passes through the cylinder cover and is connected to the exhaust pipe through the fastening nut B, and a circular sieve plate is vertically arranged inside the right side of the cylinder C. It uses multiple space division and combination methods, has a relatively complex structure, and needs to be replaced frequently. As an air intake component of the oxygen-nitrogen separation device, replacement is time-consuming and labor-intensive.

[0005] In order to change the above disadvantages, the existing improved filter device scheme adopts an air intake cover made of sheet metal. Figure 7 The sheet metal air intake cover includes a first air intake frame 61 and a second air intake frame 62, but its processing and forming requires multiple bending steps, and then the two sheet metal parts are first connected together by screws, and then fixed to the inner chassis and the air intake side panel respectively, and then the filter is put on. The number of screws required for the entire installation process is 24. The installation process is relatively cumbersome, especially in high-altitude areas, where the air is thin, and the compressor and other components in the oxygen concentrator are more prone to failure than in plains. High-altitude outdoor maintenance operations are more labor-intensive. The installation process of the sheet metal air intake hood is as follows: the first air intake frame 61 and the second air intake frame 62 are fixed together with screws to form an air intake frame component, and then the Velcro is adhered to the outer surfaces of the first air intake frame 61 and the second air intake frame 62 with double-sided tape, and then the air intake frame component is fixed to the air intake side panel. The first air intake frame 61 is fixed to the side panel of the inner chassis 4 by 10 screws, and the second air intake frame 62 is fixed to the inner chassis 4 by 3 screws. The first air intake frame 61 and the second air intake frame 62 are also required to be connected to each other by 4 screws. The first air intake frame 61 and the second air intake frame 62 are sheet metal parts made of Q235 steel. Both parts are processed by multiple bending processes. The required procedures are complicated, the manufacturing process is cumbersome, the processing efficiency is low, and the parts cost is expensive.

[0006] In view of this, how to solve the problems existing in the prior art such as complex structure of filter devices, complex production and assembly, high cost, and time-consuming and labor-intensive replacement, especially in high-altitude areas where the assembly, maintenance and repair of oxygen and nitrogen separation devices are difficult and labor-intensive, which makes the problems of filter devices more prominent, has become the subject to be studied and solved by the present invention. Summary of the invention

[0007] The present invention provides a filter device and a diffuse oxygen-nitrogen separation device using the same, which solve the problems of complex structure, complex production and assembly, high cost, and time-consuming and labor-intensive replacement of the filter device in the prior art, so as to provide a filter device with ingenious structure, simple production, convenient and labor-saving replacement, and a diffuse oxygen-nitrogen separation device using the same.

[0008] To achieve the above object, the present invention proposes a filter device, which is used for air filtration of a diffuse oxygen-nitrogen separation device under a plateau environment, and includes an intake side component installed on the intake side of an inner chassis and a filter screen sleeved on the intake side component, the intake side component includes an intake hood and an intake side plate, the intake side plate is installed toward the intake side of the inner chassis, an intake space for inserting an external intake connector is provided in the intake hood, and the intake space is located above the insertion position of the external intake connector, and its innovation lies in:

[0009] The air intake cover includes an integrally formed lower air intake frame and an upper air intake frame;

[0010] The lower air intake frame is provided with a first frame, the first frame extending from one end to the other end of the air intake cover, at least two positioning bosses are fixedly provided on the inner side of the first frame, and staggered support ribs for supporting the first frame are also provided on the inner side of the frame, and a first support column extending toward the air intake side of the inner chassis is provided on the support ribs;

[0011] The upper air intake frame is provided with two sets of second frames parallel to each other in the upper and lower parts on the extension section extending upward from the first frame, an air intake space for inserting an external air intake connector is formed between the two sets of second frames, and a hollow support frame for supporting the two sets of second frames is provided on the side away from the first frame on the two sets of second frames; the air intake space forms a completely open first opening on the other side opposite to the support frame, a plurality of second long support columns are provided on the second frame located above, and a second opening penetrating to the first opening is provided between adjacent second support columns; support columns are provided on the two sets of second frames at positions located on both sides of the air intake space;

[0012] The filter screen is sleeved on the lower air intake frame and the upper air intake frame of the air intake hood.

[0013] The present invention also proposes a diffuse oxygen and nitrogen separation device, which uses the filter device in the above scheme. The separation device also includes an inner chassis and an air intake connector that passes through the inner chassis, the filter device is vertically fixed to the air intake side of the inner chassis, and the air intake cover and the air intake side plate are fixed to the inner chassis by the cooperation of the fastener and the positioning boss, and the air intake connector vertically passes through the second frame located below and enters the air intake space, and the lower surface of the second frame is tightly fitted with the upper surface of the inner chassis.

[0014] The relevant contents of the present invention are explained as follows:

[0015] 1. The present invention greatly improves the air intake area and filtering area of ​​the air intake hood, especially the upper air intake frame, by means of the structural design and layout of the air intake side components. Specifically, the present invention greatly improves the air intake area and filtering area of ​​the upper air intake frame, especially the upper air intake frame, by means of the structural design of the two sets of second frames, the support frame, the second support column and the support column on the upper air intake frame. These designs ensure that the upper air intake frame has the first opening, the second opening and other parts that can be used for air intake while ensuring sufficient structural rigidity. The upper air intake frame is mainly supported by two groups of second frames, and a hollow support frame is arranged on one side of the second frame, which effectively supports the upper and lower second frames and enables the rearward side of the upper air intake frame to inlet air; the first opening is completely open and arranged outward, so the front side of the upper air intake frame is completely hollowed out, and the default of this part has little effect on the rigidity of the entire part, but effectively increases the air intake area, provides sufficient air intake hole distance around the external air intake joint, and reduces the air intake resistance of the entire filter device; the second support column is arranged on the second frame located at the top, and the second support column plays a role in improving the strength of the upper side of the entire upper air intake frame. The second air inlet located on the upper side of the upper air intake frame also leaves a certain air intake area for the upper side, so that the airflow can inlet from the upper side of the upper air intake frame; and the support columns arranged on the two groups of second frames on the left and right sides of the air intake space not only support the two sides of the second frame, but also enable the left and right sides of the upper air intake frame to have a certain air intake area, so that the airflow can inlet from the left and right sides of the upper air intake frame. In addition, through the structural design of the two sets of second frames, the support frame, the second support column and the support column on the upper air intake frame, the contact area between the filter screen and various parts of the upper air intake frame is reduced after the filter screen is inserted into the upper air intake frame, so that the effective filtering area of ​​the filter screen is also improved.

[0016] 2. The air intake hood part in the present invention is designed to be an integrated molding structure, wherein the integrated molding of the air intake hood is also convenient. The air intake hood is designed with a parting line along the surface where the support ribs and the positioning bosses are located, thereby completing the smooth demoulding of the entire part in the upper and lower directions without the need for a complex mechanism, while ensuring the quality and pass rate of the product. The demoulding directions of the sixth side, the first side, the support ribs, the positioning bosses, the fourth side, the eighth side, the second side, and the third side are upward, and their corresponding surfaces are downward. The eighth side and the ninth side share the same second frame, which simplifies the structure of the mold and maintains the uniform thickness of the entire mold. The problem of the complex structure of the air intake hood and related components during production is solved, and the problems of the prior art requiring multiple bending processes, complex procedures, cumbersome manufacturing processes, low processing efficiency, and expensive parts costs, etc., are solved. The entire part achieves the benefits of lower cost, simpler process, and higher production efficiency.

[0017] 3. In the present invention, further, two second frames are set perpendicular to and parallel to the first frame, and the supporting columns and the two groups of second frames form a U-shaped structure, thereby moving the two supporting columns to the front side of the upper air intake frame by a certain distance, thereby flexibly reducing the contact area between the filter screen and the left and right sides of the upper air intake frame.

[0018] 4. In the present invention, further, the positioning bosses, support ribs and support columns are not arranged through the front and rear surfaces of the first frame, and the support columns are 0.2 to 0.6 mm lower than the height of the first frame. At the same time, the support columns are evenly arranged on the rear side of the lower air intake frame to prevent the filters from being sucked together and affecting the air intake of the compressor.

[0019] 5. In the present invention, further, the support ribs include first support ribs, second support ribs and third support ribs, wherein the second support ribs and the third support ribs are arranged at an angle of 90°, the first support ribs and the second support ribs and the third support ribs are arranged at an angle of 45°, the heights of the second support ribs and the third support ribs are 1 / 10 to 2 / 3 of the height of the first frame, the height of the first support rib is 1 / 10 to 2 / 3 of the height of the first frame, and the three support ribs are arranged in the first frame to support the overall structure. Such a design saves materials and reduces weight, and improves the rigidity of the structure.

[0020] 6. In the present invention, further, the support frame is two symmetrically arranged M-shaped structures, which play the role of supporting the upper and lower sets of second frames, which not only improves the strength of the plastic part, but also facilitates the expansion of the filter surface.

[0021] 7. In the present invention, further, the support column has a downwardly protruding reinforcing rib below, which improves the structural strength of the second frame located above.

[0022] 8. In the present invention, further, a layer of activated carbon is attached to the surface of the filter. The activated carbon layer has a large specific surface area, which can improve the adsorption capacity and adsorption speed of the filter and remove components that are harmful to the human body or have odors.

[0023] 9. In the present invention, further, a plurality of transverse plates are provided on the second frame located at the bottom, and there are gaps between the transverse plates for inserting the external air intake connector. The upper air intake frame is directly attached to the inner chassis in the lower side surface of the second frame located at the bottom, so it does not need to play the air intake function. Such a design can make the second frame located at the bottom more solid. The support columns and transverse plates are both arranged along the front-to-back direction, and rounded corners are provided at the connection points where the support columns and the transverse plates are respectively connected to the second frame and away from the first frame. A protrusion is provided on the second frame located at the bottom at a position away from the first frame, and the protrusion is located between the two transverse plates to locally strengthen the force point.

[0024] 10. In the present invention, in the present invention, in the present invention, in the present invention, the orientation or position relationship indicated by the terms "front", "rear", "bottom", "inside", "outside", etc. is based on the orientation or position assembly relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0025] 11. In the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances;

[0026] 12. In the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] Due to the application of the above scheme, the present invention has the following advantages and effects compared with the prior art:

[0028] 1. The above scheme of the present invention greatly improves the air intake area of ​​the air intake hood, especially the upper air intake frame, by designing and arranging the structural layout of the air intake side components. The inward side, outward side, upper side, left and right sides of the upper air intake frame can all be used for air intake, and the filter screen can be prevented from being sucked together to avoid affecting the air intake volume of the compressor, thereby greatly improving the effective filtering area of ​​the filter screen. The adsorption area of ​​the filter screen is 1.5 times the air intake area of ​​the original sheet metal air intake frame scheme. The air intake filtration area is larger in the original limited internal space of the oxygen generator, and the filtering effect and time are longer, which avoids frequent replacement by users. The structure is novel and simple, and the production is convenient. Moreover, in the plateau environment of the diffused oxygen generator and within the normal life span of the molecular sieve, the user does not need to replace the filter device, and the filtering effect can be achieved;

[0029] 2. In the above solution of the present invention, the air intake cover is of integrated design. Such a structure is easy to produce, does not require a very complicated production process, and its production cost is not high. At the same time, the integrated air intake cover cooperates with the air intake side plate and the filter screen, and can be quickly and correctly assembled to the diffuse oxygen and nitrogen separation device, which greatly reduces the number of screws required for installation. The installation process is simple, and the filter device can be installed quickly;

[0030] 3. The air intake hood in the present invention is designed with a parting line along the surface where the support ribs and the positioning boss are located, so that the whole part can be smoothly demolded in the upper and lower directions without complex mechanisms, while ensuring the quality and qualified rate of the product. The demolding directions of the sixth side, the first side, the support ribs, the positioning boss, the fourth side, the eighth side, the second side, and the third side are upward, and their corresponding surfaces are downward. The eighth side and the ninth side share the same second frame, which simplifies the structure of the mold and keeps the thickness of the mold uniform. It effectively solves the problems of the complex structure of the air intake hood and related parts in the production, and solves the problems of the prior art that multiple bending processes are required, the required procedures are complex, the manufacturing process is cumbersome, the processing efficiency is low, and the parts cost is expensive. The whole part achieves the benefits of lower cost, simpler process, and higher production efficiency.

[0031] 4. In summary, the technical solution of the present invention makes the structure simple and novel through the overall design of the filter device. Compared with the prior art, it avoids the complicated bending of sheet metal parts and has low manufacturing cost. It only needs to fix the positioning boss to the inner chassis, which greatly reduces the number of screws required for installation. The installation is simple and reduces the workload of maintaining the oxygen-nitrogen separation device in high-altitude areas. At the same time, compared with the traditional filter net, the filtration area is greatly increased, which saves the work of maintaining the filter device in high-altitude areas. There is no need to replace or clean the filter device within the normal working life of the oxygen generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Attached Figure 1 It is a three-dimensional schematic diagram of a filter device according to an embodiment of the present invention;

[0033] Attached Figure 2 This is a schematic diagram of the assembly of a filter device according to an embodiment of the present invention;

[0034] Attached Figure 3 A three-dimensional schematic diagram of an air inlet cover in a filter device according to an embodiment of the present invention Figure 1 ;

[0035] Attached Figure 4 A three-dimensional schematic diagram of an air inlet cover in a filter device according to an embodiment of the present invention Figure 2 ;

[0036] Attached Figure 5It is a schematic diagram of installing the air intake cover and the air intake side panel to the inner chassis in an embodiment of the present invention;

[0037] Attached Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0038] Attached Figure 7 It is a structural schematic diagram of an existing sheet metal air intake hood.

[0039] The various parts of the above drawings are shown as follows:

[0040] 1. Filter;

[0041] 2. Air intake hood;

[0042] 21. lower air intake frame; 211. first frame; 212. positioning boss; 213. support rib; 2131. first support rib; 2132. second support rib; 2133. third support rib; 214. first support column;

[0043] 22, upper air intake frame; 221, second frame; 222, air intake space; 223, support frame; 224, first opening; 225, support column; 226, second opening; 227, second support column; 228, reinforcing rib; 229, horizontal plate; 2291, convex block;

[0044] 201, first side surface; 202, second side surface; 203, third side surface; 204, fourth side surface; 205, fifth side surface; 206, sixth side surface; 207, seventh side surface; 208, eighth side surface;

[0045] 3. Air intake side panel;

[0046] 4. Inner chassis;

[0047] 5. Air inlet connector;

[0048] 61. First air intake rack; 62. Second air intake rack. DETAILED DESCRIPTION

[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, wherein Figure 3 The position mark in this application is attached Figure 3 The directions indicated by the three-dimensional coordinate system of “up”, “front” and “right” are described, and the opposite directions of “up”, “front” and “right” are “down”, “back” and “left” respectively.

[0050] For a clearer description of the embodiments of the present invention, please refer to the attached drawings. Figure 3 and attached Figure 4, define and mark each side of the lower air intake frame 21 and the upper air intake frame 22 in the air intake cover 2, the side facing forward of the lower air intake frame 21 is the first side 201, the side facing backward is the second side 202, the side facing upward of the upper air intake frame 22 is the third side 203, the side facing downward is the fourth side 204, the side facing forward is the fifth side 205, the side facing backward is the sixth side 206, the side facing left is the seventh side 207, and the side facing right is the eighth side 208. Embodiment 1

[0051] Reference Figure 1 To the attached Figure 6 , Embodiment 1 of the present invention proposes a filter device, which is used for air filtration of a diffuse oxygen-nitrogen separation device under a plateau environment, and includes an air intake side component installed on the air intake side of an inner chassis 4 and a filter screen 1 sleeved on the air intake side component, the air intake side component includes an air intake cover 2 and an air intake side plate 3, the air intake side plate 3 is installed toward the air intake side of the inner chassis 4, the air intake cover 2 is provided with an air intake space 222 for inserting an external air intake connector 5, and the air intake space 222 is located above the insertion position of the external air intake connector 5;

[0052] The air intake hood 2 includes an integrally formed lower air intake frame 21 and an upper air intake frame 22; the lower air intake frame 21 is provided with a first frame 211, the first frame 211 extends from one end of the air intake hood 2 to the other end, at least two positioning bosses 212 are fixedly provided on the inner side of the first frame 211, and staggered support ribs for supporting the first frame 211 are also provided on the inner side of the frame, and the support ribs are provided with a first support column 214 extending toward the air intake side of the inner chassis 4; the upper air intake frame 22 is provided with two groups of upper and lower parallel second frames 221 on the extension section extending upward from the first frame 211, and an air intake space for inserting the external air intake connector 5 is formed between the two groups of second frames 221. Space 222, a hollow support frame 223 for supporting the two groups of second frames 221 is arranged on the side away from the first frame 211 on the two groups of second frames 221; the air intake space 222 forms a completely open first opening 224 on the other side opposite to the support frame 223, and a plurality of long second support columns 227 are arranged on the second frame 221 located above, and a second opening 226 that passes through to the first opening 224 is provided between adjacent second support columns 227; support columns 225 are arranged on the two groups of second frames 221 at positions located on both sides of the air intake space 222; the filter screen 1 is mounted on the lower air intake frame 21 and the upper air intake frame 22 of the air intake hood 2.

[0053] In the first embodiment, through the structural design of two sets of second side frames 221, support frames 223, second support columns 227, and support columns 225 on the upper air intake frame 22, and these designs enable the upper air intake frame 22 to have a first opening 224, a second opening 226, and other parts available for air intake while ensuring sufficient structural stiffness. The upper air intake frame 22 uses two sets of second side frames 221 as the main support structure, and a hollowed-out support frame 223 is arranged on one side of the second side frame 221, which strongly supports the upper and lower second side frames 221 and enables the rear side of the upper air intake frame 22 to intake air. The air intake side can be seen in Figure 3 the sixth side 206 in; the first opening 224 is completely open and朝外设置 (it seems there is a wrong expression here, maybe it should be "outward") and is arranged, so the front side of the upper air intake frame 22 is completely hollowed out. The lack of this part has little impact on the stiffness of the entire part, but effectively increases the air intake area, leaving enough air intake hole spacing around the external air intake joint 5, reducing the air intake resistance of the entire filter device; the second support column 227 is arranged on the second side frame 221 located above, and the second support column 227 plays a role in improving the strength of the upper side of the entire upper air intake frame 22. The second air intake port on the upper side of the upper air intake frame 22 also leaves a certain air intake area for the upper side, allowing air flow to intake air from the upper side of the upper air intake frame 22; the support columns 225 arranged on both sides of the air intake space 222 on the two sets of second side frames 221 not only support both sides of the second side frame 221 but also enable the left and right sides of the upper air intake frame 22 to have a certain air intake area, allowing air flow to intake air from the left and right sides of the upper air intake frame 22. In addition, through the structural design of two sets of second side frames 221, support frames 223, second support columns 227, and support columns 225 on the upper air intake frame 22, the contact area between the filter net 1 and each part in the upper air intake frame 22 is reduced after the filter net 1 is sleeved into the upper air intake frame 22, so that the effective filtering area of the filter net 1 is also improved.

[0054] In the first embodiment mentioned above, in order to reduce the contact area between the filter net 1 and the air intake cover 2 and increase the air intake area, the two second side frames 221 are perpendicularly and parallelly arranged to the first side frame 211, and the support columns 225 and the two sets of second side frames 221 form a U-shaped structure, so as to move the two support columns 225 a certain distance forward to the front side of the upper air intake frame 22; the positioning boss 212, support ribs, and support columns are not penetrated and arranged on the front and rear surfaces of the first side frame 211, and the support columns are 0.2 to 0.6 mm lower than the height of the first side frame 211. The values can be 0.2 mm, 0.4 mm, 0.5 mm, or 0.6 mm. At the same time, the support columns are evenly arranged on the rear side of the lower air intake frame 21 to prevent the filter nets 1 from being sucked together and sticking, avoiding affecting the air intake volume of the compressor.

[0055] In the above embodiment, a plurality of transverse plates 229 are provided on the second frame 221 located at the bottom, and there is a gap between the transverse plates 229 for inserting the external air intake connector 5. The support columns 225 and the transverse plates 229 are arranged along the front-to-back direction, and rounded corners are provided at the connection points where the support columns 225 and the transverse plates 229 are respectively connected to the second frame 221 and away from the first frame 211. A protrusion 2291 is provided on the second frame 221 located at the bottom at a position away from the first frame 211, and the protrusion 2291 is located between the two transverse plates 229 to locally strengthen the stress point. The upper air intake frame 22 is directly attached to the inner chassis 4 in the lower side surface of the second frame 221 located at the bottom, so it does not need to play the function of air intake. Such a design can make the second frame 221 located at the bottom more solid.

[0056] In the above-mentioned embodiment 1, the support ribs include a first support rib 2131, a second support rib 2132 and a third support rib 2133, wherein the second support rib 2132 and the third support rib 2133 are arranged at a 90° angle, the first support rib 2131 and the second support rib 2132 and the third support rib 2133 are all arranged at a 45° angle, the height of the second support rib 2132 and the third support rib 2133 is 1 / 10 to 2 / 3 of the height of the first frame 211, and its value can be 1 / 10, 1 / 5 or 2 / 3, the height of the first support rib 2131 is 1 / 10 to 2 / 3 of the height of the first frame 211, and its value can be 1 / 10, 2 / 5 or 2 / 3, and the three support ribs are arranged in the first frame 211 to support the overall structure. Such a design saves materials and reduces weight, and improves the rigidity of the structure.

[0057] In the above-mentioned first embodiment, in order to improve the strength of the plastic part and facilitate the unfolding of the surface of the filter screen 1, the support frame 223 is two symmetrically arranged cross-shaped structures, which play the role of supporting the upper and lower sets of second frames 221. Embodiment 2

[0058] See also Figure 5 As shown, the second embodiment of the present invention proposes a diffuse oxygen and nitrogen separation device, and the separation device uses the filter device in the above scheme. The separation device also includes an inner chassis 4 and an air intake connector 5 passing through the inner chassis 4, and the filter device is vertically fixed to the air intake side of the inner chassis 4. The air intake cover 2 and the air intake side plate 3 are fixed to the inner chassis 4 by the cooperation of the fastener and the positioning boss 212. The air intake connector 5 vertically passes through the second frame 221 located below and enters the air intake space 222. The lower surface of the second frame 221 is tightly fitted with the upper surface of the inner chassis 4.

[0059] The following is a description of one installation method of the filter device in Example 1:

[0060] When installing the diffuse oxygen concentrator filter device, the four positioning bosses 212 of the air intake side plate 3 in the air intake side plate 3 are fixed to the inner chassis 4 with screws, and then the filter screen 1 is inserted into the air intake cover 2 along the shape of the air intake cover 2. The third side 203, the fifth side 205, the sixth side 206, the seventh side 207, and the eighth side 208 of the filter screen 1 can all take in air. The adsorption area of ​​the filter screen 1 is 1.5 times the air intake area of ​​the original sheet metal air intake frame solution. Since the fifth side 205 on the air intake cover 2 is completely hollowed out, and the first support rib 2 on the air intake cover 2 131, the second support rib 2132, the third support rib 2133 are relatively small in size, so the contact area between the filter and the air intake cover 2 is reduced, and the air intake area is increased. The air intake area of ​​these two filtering schemes is greatly improved compared with the traditional single cylindrical air intake felt scheme, realizing the free replacement of the filter 1. A rubber band of suitable size is put on the upper part of the filter 1 to fix it, and the rest of the filter 1 is pressed along the shape of the air intake cover 2, so that the filter 1 and the pre-installed double-sided adhesive are fully in contact, and the installation of the entire filter device is completed. After the airflow passes through the filter 1, it enters the compressor air intake through the air intake joint 5, continuously providing raw materials for the compressor.

[0061] With respect to the above-mentioned Embodiment 1 and Embodiment 2, possible changes of the present invention are described as follows:

[0062] 1. In the above technical solution, the filter 1 can be made of polyester material, which has good acid and alkali resistance and is not afraid of mold. However, the present invention is not limited to this. The filter 1 can also use other materials such as acrylic, cotton, linen, etc., or a layer of activated carbon layer is attached to the outer surface of the filter 1. The activated carbon layer has a large specific surface area, which can improve the adsorption capacity and adsorption speed of the filter 1, and at the same time remove components that are harmful to the human body or have odors.

[0063] 2. In the above technical solution, the material of the air inlet cover 2 can be ABS or nylon, or other alloy materials with anti-corrosion protection, which have low density and good thermal flow properties, and are convenient for mold processing and manufacturing.

[0064] 3. In the above technical solution, the entire structure of the air intake hood 2 is an axisymmetric structure, which is simple and novel and has the symmetrical beauty of engineering. However, the present invention is not limited to this, and the air intake hood 2 can also adopt an asymmetric structure.

[0065] 4. In the above technical solution, for the installation of the filter 1, it can be pre-fixed on the first side 201 with one side of a burr buckle with double-sided tape, and double-sided tape is also affixed on the back of the burr buckle. Then, the filter 1 is pressed against the double-sided tape along the shape of the air intake hood 2 to complete the installation. However, the present invention is not limited to this. The filter 1 can also be fixed by hot melt adhesive, ultrasonic welding, etc.

[0066] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter device, comprising an air intake side component mounted on the air intake side of an inner case (4) and a filter screen (1) sleeved on the air intake side component, the air intake side component comprising an air intake cover (2) and an air intake side plate (3), the air intake cover (2) being provided with an air intake space (222) for inserting an external air intake connector (5), the air intake space (222) being located above a position where the external air intake connector (5) is inserted, and characterized in that: The air intake cover (2) comprises an integrally formed lower air intake frame (21) and an upper air intake frame (22), wherein the lower air intake frame (21) is located in front of the air intake side of the inner chassis (4); The lower air intake frame (21) is provided with a first frame (211), the first frame (211) extending from the lower end to the upper end of the air intake cover (2), at least two positioning bosses (212) are fixedly provided on the inner side of the first frame (211), and staggered support ribs (213) for supporting the first frame (211) are also provided on the inner side of the first frame (211), and a first support column (214) extending backward is provided on the support rib (213); The upper air intake frame (22) is provided with two groups of second frames (221) arranged in an upper and lower manner on an extension section extending upward from the first frame (211); an air intake space (222) into which an external air intake connector (5) can be inserted is formed between the two groups of second frames (221); a support frame (223) for supporting the two groups of second frames (221) is provided on a side away from the first frame (211) on the two groups of second frames (221); the support frame (223) is hollowed out; a completely open first opening (224) is provided on the front side of the upper air intake frame (222); a plurality of long strip-shaped second support columns (227) are provided on the second frame (221) located above; and a second opening (226) which is at least partially open and passes through the first opening (224) is provided between adjacent second support columns (227); support columns (225) are provided on the left and right sides of the air intake space (222) on the two groups of second frames (221); The filter screen (1) is sleeved on the air intake cover (2).

2. The filter device according to claim 1, characterized in that: The two second frame frames (221) are arranged perpendicularly to the first frame frame (211) and in parallel, the support pillars (225) are closely attached to the extension section of the first frame frame (211), and the support pillars (225) and the two sets of second frame frames (221) form a U-shaped structure.

3. The filter device according to claim 1, characterized in that: The positioning boss (212), the supporting rib (213), and the first supporting column (214) are arranged non-through on the front and rear surfaces of the first frame (211); the first supporting column (214) is 0.2 to 0.6 mm lower than the height of the first frame (211).

4. The filter device according to claim 1, characterized in that: The support ribs (213) comprise a first support rib (2131), a second support rib (2132) and a third support rib (2133), wherein the second support rib (2132) and the third support rib (2133) are arranged at a 90° angle, the first support rib (2131) and the second support rib (2132) and the third support rib (2133) are arranged at a 45° angle, the height of the second support rib (2132) and the third support rib (2133) is 1 / 10 to 2 / 3 of the height of the first frame (211), and the height of the first support rib (2131) is 1 / 10 to 2 / 3 of the height of the first frame (211).

5. The filter device according to claim 1, characterized in that: The support frame (223) is two symmetrically arranged cross-shaped structures.

6. The filter device according to claim 1, characterized in that: A downwardly protruding reinforcing rib (228) is provided below the supporting column (225).

7. The filter device according to claim 1, characterized in that: An activated carbon layer is attached to the surface of the filter screen (1).

8. The filter device according to claim 1, characterized in that: A plurality of transverse plates (229) are arranged on the second frame (221) located at the bottom, and gaps are provided between the transverse plates (229) for inserting an external air intake connector (5).

9. The filter device according to claim 8, characterized in that: The supporting columns (225) and the transverse plate (229) are both arranged along the front-to-back direction, and rounded corners are arranged at the connection points where the supporting columns (225) and the transverse plate (229) are respectively connected to the second frame (221) and are away from the first frame (211).

10. The filter device according to claim 8, characterized in that: A convex block (2291) is provided on the second frame (221) located at the bottom at a position away from the first frame (211); the convex block (2291) is located between the two transverse plates (229).

11. A diffuse oxygen and nitrogen separation device, characterized in that: The separation device uses the filter device according to claim 1.

12. The diffuse oxygen and nitrogen separation device according to claim 11, characterized in that: The separation device comprises an inner case (4) and an air intake connector (5) passing through the inner case (4); the filter device is vertically fixed to the air intake side of the inner case (4); the air intake cover (2) and the air intake side plate (3) are fixed to the inner case (4) by the cooperation of the fastener and the positioning boss (212); the air intake connector (5) vertically passes through the second frame (221) located below and enters the air intake space (222); the lower surface of the second frame (221) is tightly fitted to the upper surface of the inner case (4).

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