Oxygen generation valve assembly and oxygen generator

Abstract

The utility model relates to the technical field of valves, in particular to an oxygen generation valve assembly and an oxygen generator. The oxygen generation valve assembly comprises a valve body and an electromagnetic assembly, at least two cavities are formed in the valve body, a mounting part, a limiting part and an extending part are sequentially arranged in each cavity, and the oxygen generation valve assembly further comprises an air inlet channel, an air outlet channel and an exhaust channel; the electromagnetic assembly comprises a shell, a coil assembly, a static iron core and a movable iron core, the movable iron core and the static iron core are coaxially arranged, a first cavity used for containing the elastic piece is formed in the movable iron core, and the sliding part protrudes outwards and is movably arranged in the limiting part; limiting is carried out through a first sealing piece arranged in a groove in the bottom of the support and a first sealing piece arranged in a limiting part, and blocking of the air inlet channel or the exhaust channel is achieved; the utility model further provides an oxygen generator using the oxygen generation valve assembly. According to the oxygen generation valve assembly, good sealing of the airflow channel is achieved, assembling is convenient, the product yield is increased, and the integrated oxygen generation valve assembly is beneficial to miniaturization of an oxygen generator.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an oxygen making valve component and an oxygen making machine. Background Art

[0002] Molecular sieve oxygen generator is a device for producing oxygen. It uses the principle of pressure swing adsorption to transport air to the compressor for pressurization and then transport it to the adsorption cylinder for pressure swing adsorption oxygen production. It uses the pressurized adsorption principle of the adsorbent to adsorb nitrogen, thereby extracting oxygen and transporting it to the user, so as to improve the user's hypoxia condition.

[0003] The oxygen production valve is the bridge connecting the compressor and the adsorption cylinder. It transports the air pressurized by the compressor to the adsorption cylinder through the connection between the air inlet and the air outlet. The nitrogen discharged from the adsorption cylinder during the decompression and desorption stage is discharged out of the adsorption cylinder through the connection between the air outlet and the exhaust port of the oxygen production valve.

[0004] In order to improve the oxygen production efficiency, the number of adsorption cylinders in an oxygen concentrator is usually greater than one. In order to facilitate the air intake and exhaust of multiple adsorption cylinders, the number of oxygen production valves is usually consistent with the number of adsorption cylinders. However, in the prior art, most oxygen production valves are pilot valves with large size and complex gas path structure in the valve body. Multiple oxygen production valves are simultaneously arranged in the oxygen concentrator, which is not conducive to the miniaturization of the oxygen concentrator.

[0005] To improve this problem, some researchers have designed a direct-acting oxygen-making valve, which is relatively small in size. By providing a sealing portion protruding outward at the lower part of the moving iron core, and providing a sealing sleeve on the sealing portion to wrap the sealing portion, the air intake channel or the exhaust channel is blocked by the up and down movement of the sealing portion. The purpose is to achieve a good seal of the gas path by the setting of the sealing sleeve. However, in the actual production process, the sealing sleeve is small in size, and it is difficult to achieve the required processing accuracy, which usually leads to poor sealing and gas leakage from the sealing sleeve, affecting the use of the oxygen-making valve, thereby affecting the oxygen production effect of the oxygen concentrator.

[0006] Therefore, it is necessary to provide an oxygen-generating valve assembly that is beneficial to the miniaturization of the oxygen generator and to enhance the sealing effect of the valve. Utility Model Content

[0007] In view of the above deficiencies in the prior art, the utility model provides an oxygen-generating valve assembly and an oxygen concentrator. By arranging at least two relatively independent cavities in the valve body and making the cavities correspond to the electromagnetic components, the integration of the oxygen-generating valve is realized, which is beneficial to the miniaturization of the oxygen concentrator. In addition, a mounting portion and a limiting portion are arranged in the cavity, and the support is arranged in the mounting portion. By arranging a first sealing member in the grooves at the bottom of the limiting portion and the bottom of the support, the sliding portion of the moving iron core is limited in the limiting portion. The manufacturing process of the first sealing member is simple, the assembly error is reduced, and good sealing of the intake channel or the exhaust channel is achieved.

[0008] The technical solution adopted by the utility model to solve the technical problem is:

[0009] In one aspect, the utility model provides an oxygen production valve assembly, comprising:

[0010] A valve body, wherein at least two relatively independent cavities are arranged inside, each of the cavities is provided with a mounting portion, a limiting portion and an extending portion in sequence from top to bottom, a plurality of the mounting portions are connected through a first channel, and a plurality of the extending portions are connected through a second channel; and

[0011] an air intake passage, disposed on the valve body and connected to one of the extension portions; and

[0012] an air outlet channel, which is arranged on the valve body and connected to the limiting portion, and the limiting portion corresponds to the air outlet channel one by one; and

[0013] an exhaust passage, disposed on the valve body and connected to one of the mounting portions; and

[0014] an electromagnetic assembly, arranged opposite to the cavity, comprising a shell, the shell being arranged on the upper part of the valve body and being fixedly connected or detachably connected to the valve body, and a coil assembly being arranged inside the shell; and

[0015] A static iron core is disposed inside the shell and is detachably connected to the shell; the static iron core is sleeved inside the coil assembly; and

[0016] a moving iron core, coaxially arranged with the stationary iron core, comprising a first portion arranged inside the coil assembly and a second portion arranged inside the valve body, wherein the first portion is provided with a first chamber for accommodating an elastic member, and the second portion is provided with a sliding portion protruding outward; and

[0017] A support, arranged in the mounting portion, with its top flush with the top of the valve body, and its bottom connected to the first boss, the support having a hollow interior and a groove at its bottom; and

[0018] A first sealing member is disposed in the cavity, two first sealing members are disposed in each cavity, and the two first sealing members are symmetrically disposed in the groove and the limiting portion, respectively, and the top of the first sealing member is at least partially flexible;

[0019] The sliding part is movably arranged in the limiting part, slides up and down along the axial direction thereof, and is limited between the flexible tops of the two first sealing members.

[0020] Furthermore, it also includes a positioning column, which is arranged at the top of the valve body near the cavity, and the bottom of the shell is provided with a hole corresponding to the positioning column, and the positioning column extends upward into the hole;

[0021] or,

[0022] It also includes a positioning column, which is arranged at the bottom of the flange at the bottom of the shell and is arranged toward the valve body. The valve body is provided with a hole corresponding to the positioning column, and the positioning column extends downward into the hole.

[0023] Furthermore, the first sealing member is a sealing convex gasket, a pressure ring is arranged between the protruding portion of one sealing convex gasket and the groove, and a pressure ring is arranged between the protruding portion of another sealing convex gasket and the limiting portion.

[0024] Furthermore, the coil assembly includes a coil, a frame, a first bushing and a second bushing, the coil is wound on the frame, the first bushing is arranged between the frame and the moving iron core, and the second bushing is arranged between the frame and the stationary iron core.

[0025] Furthermore, it also includes a fixing pin, and the shell, the frame and the static iron core are connected by the fixing pin.

[0026] Furthermore, a flexible member is provided at the bottom of the static iron core, and / or an annular flexible member is provided at the top of the moving iron core.

[0027] Furthermore, second sealing members are respectively arranged between the mounting portion and the support, between the moving iron core and the support, and between the moving iron core and the inner wall of the extending portion.

[0028] Furthermore, a V-shaped sealing ring is provided between the moving iron core and the upper portion of the support, and between the moving iron core and the inner wall of the extending portion.

[0029] Furthermore, a second chamber is provided in the moving iron core.

[0030] On the other hand, the utility model also provides an oxygen generator using the oxygen generator valve assembly as described above.

[0031] The utility model has the following beneficial effects: the utility model realizes the integration of the oxygen-making valve by arranging a plurality of relatively independent cavities in the valve body and arranging the electromagnetic assembly relative to the cavity, which is beneficial to the miniaturization of the oxygen-making machine; a mounting portion, a limiting portion and an extending portion are arranged in the cavity, and the support is arranged in the mounting portion, and the sliding portion of the moving iron core is limited in the limiting portion by arranging mutually symmetrical first sealing members in the grooves at the bottom of the limiting portion and the bottom of the support, the manufacturing process of the first sealing member is simple, the assembly error is reduced, the problem of poor sealing of the oxygen-making valve causing air leakage of the oxygen-making valve is solved, and good sealing of the air intake channel or the exhaust channel is realized; the elastic member is arranged in the first chamber of the moving iron core, and compared with the elastic member of the same length arranged on the outside of the moving iron core, the length of the moving iron core is relatively reduced, thereby reducing the volume of the oxygen-making valve, which is beneficial to the miniaturization of the oxygen-making valve assembly; at the same time, the utility model sets each air flow channel relatively independently, and each oxygen-making valve does not interfere with each other, and can produce oxygen separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The three-dimensional structure diagram of the oxygen valve assembly provided by the utility model Figure 1 ;

[0033] Figure 2 The three-dimensional structure diagram of the oxygen valve assembly provided by the utility model Figure 2 ;

[0034] Figure 3 It is a schematic diagram of the cross-sectional structure of a valve body in an embodiment provided by the utility model;

[0035] Figure 4 It is a schematic diagram of different working states of two oxygen-generating valves in the oxygen-generating valve assembly in the embodiment provided by the utility model;

[0036] Figure 5 It is a schematic cross-sectional structural diagram of another valve body in the embodiment provided by the utility model;

[0037] Figure 6 It is a schematic cross-sectional structural diagram of an electromagnetic component in an embodiment provided by the utility model;

[0038] Figure 7 It is a schematic cross-sectional structural diagram of a moving iron core in an embodiment provided by the utility model;

[0039] Figure 8 It is a structural schematic diagram of a support in the embodiment provided by the utility model;

[0040] Fig. 9 This is a schematic structural diagram of a first sealing member in an embodiment provided by the utility model;

[0041] Fig.10It is a cross-sectional structural schematic diagram of an oxygen production valve assembly according to an embodiment of the utility model;

[0042] Fig.11 yes Fig.10 An enlarged view of section IV circled in the middle.

[0043] In the figure, 1, valve body 2, electromagnetic assembly 3, support 4, first sealing member 5, pressure ring 6, elastic member 7, fixing pin 10, cavity 11, air inlet channel 12, air outlet channel 13, exhaust channel 14, positioning column 15, mounting portion 16, limiting portion 17, first channel 18, second channel 19, extension portion 21, shell 22, coil 23, skeleton 24, first bushing 25, static iron core 26, moving iron core 27, second bushing 31, groove 41, protrusion 101, first boss 102, second boss 211, flange 261, first part 262, second part 2611, first chamber 2621, first sealing portion 2622, second sealing portion 2623, sliding portion 2624, second chamber. DETAILED DESCRIPTION

[0044] The utility model is further described below in conjunction with the accompanying drawings.

[0045] Example:

[0046] like Figures 1 to 11 As shown, the oxygen-generating valve assembly of the utility model comprises a valve body 1 and a plurality of electromagnetic assemblies 2. By arranging the oxygen-generating valve assembly, a plurality of oxygen-generating valves can be integrated together, which is conducive to the miniaturization of the oxygen concentrator. The valve body 1 is provided with at least two relatively independent cavities 10, and each cavity 10 is provided with a mounting portion 15, a limiting portion 16 and an extension portion 19 in sequence from top to bottom. Figure 3 or Figure 5 As shown, a plurality of mounting portions 15 are connected via a first channel 17 , and a plurality of extension portions 19 are connected via a second channel 18 . The number of the first channel 17 and the second channel 18 is determined according to the number of the mounting portions 15 and the extension portions 19 . That is, a first channel 17 is provided between every two adjacent mounting portions 15, and the number of the first channels 17 can increase as the number of the mounting portions 15 increases. For example, when three cavities 10 are provided in the valve body 1, three mounting portions 15 are also provided. If the cavities 10 are arranged linearly, two first channels 17 are provided, or, if the cavities 10 are arranged in a triangular shape, three first channels 17 are provided. Similarly, a second channel 18 is provided between every two adjacent extension portions 19, and the number of the second channels 18 increases as the number of the extension portions 19 increases. For example, when three cavities 10 are provided in the valve body 1, three extension portions 19 are also provided. If the cavities 10 are arranged linearly, the number of the second channels 18 is two, or, if the cavities 10 are arranged in a triangular shape, three second channels 18 are provided.

[0047] The air inlet passage 11 is disposed on the valve body 1. In one embodiment, the air inlet passage 11 is disposed at the lower portion of the valve body 1 and connected to one of the extensions 19. The high-pressure gas pressurized by the compressor enters the extension 19 of the valve body 1 through the air inlet passage 11 and flows to the other extensions 19 through the second passage 18. In one embodiment, Figure 3 or Figure 5 As shown, multiple cavities 10 are arranged linearly, and the air intake channel 11 can be set on the side of the outermost cavity 10. In order to facilitate the processing of the valve body 1 and reduce the production difficulty, the air intake channel 11 and the second channel 18 can be set on the same horizontal plane.

[0048] The air outlet channel 12 is arranged on the valve body 1. In one embodiment, in order to improve the oxygen production efficiency of the oxygen generator, at least two adsorption cylinders are usually arranged. In order to facilitate the connection between the oxygen production valve assembly and the adsorption cylinder, the air outlet channel 12 can be arranged relative to the limiting portion 16, that is, the air outlet channel 12 and the limiting portion 16 correspond one to one, one end of the air outlet channel 12 is connected to the limiting portion 16, and the other end is connected to the air inlet end of the adsorption cylinder, so as to facilitate the compressed gas input into the valve body 1 to be transported to the adsorption cylinder for pressure swing adsorption oxygen production, or the nitrogen to be discharged from the adsorption cylinder can be transported to the oxygen production valve assembly through the air outlet channel 12.

[0049] The exhaust channel 13 is disposed on the valve body 1. In one embodiment, the exhaust channel 13 can be disposed on the upper part of the valve body 1 and connected to the mounting portion 15. The nitrogen discharged from the adsorption cylinder enters the limiting portion 16 through the outlet channel 12. When the limiting portion 16 is connected to the mounting portion 15, the nitrogen is discharged through the connection between the mounting portion 15 and the exhaust channel 13. In one embodiment, in order to reduce the impact of nitrogen exhaust noise on users, the nitrogen output from the exhaust channel 13 can also be subjected to noise reduction treatment. In order to facilitate the miniaturization of the oxygen generator, only one exhaust channel 13 can be disposed on the valve body 1, and multiple mounting portions 15 are connected through the first channel 17. The exhaust channel 13 is connected to one of the mounting portions 15, and then the mounting portion 15, the first channel 17 and the exhaust channel 13 are connected. In a specific embodiment, as Figure 3 or Figure 5 As shown, the exhaust channel 13 can be arranged on the outermost mounting portion 15 of the plurality of mounting portions 15 arranged linearly, and the exhaust channel 13 and the intake channel 11 can be arranged on the same side of the valve body 1, or on two opposite sides of the valve body 1.

[0050] like Figure 4As shown, the electromagnetic assembly 2 is arranged opposite to the cavity 10, and the electromagnetic assembly 2 includes a housing 21, a coil assembly, a static iron core 25 and a moving iron core 26, wherein the housing 21 is arranged on the upper part of the valve body 1, and is fixedly connected or detachably connected to the valve body 1. Specifically, the housing 21 can be arranged just above the cavity 10, corresponding to the cavity 10 one by one, as shown in FIG. Figure 6 As shown, a flange 211 is provided at the bottom of the housing 21, and the housing 21 can be fixedly connected or detachably connected to the valve body 1 through the flange 211, such as, Figures 1-2 As shown, through holes can be set on both sides of the flange 211, and threaded holes can be set at corresponding positions of the valve body 1, and screws can be connected to the threaded holes on the valve body 1 through the through holes on the flange 211; alternatively, the bottom of the flange 211 and the top of the valve body 1 can be fixed together by gluing or welding.

[0051] The coil assembly is disposed inside the housing 21 .

[0052] The static iron core 25 is arranged inside the shell 21, and its gap is placed inside the coil assembly. When the coil assembly is powered on, the static iron core 25 can drive the moving iron core 26 to move in a direction close to the static iron core 25. The static iron core 25 is detachably connected to the shell 21. In one embodiment (not shown in the figure), the shell 21 includes a top, and a through hole is arranged at the center of the top. A threaded hole is arranged at the top of the static iron core 25 corresponding to the through hole at the top of the shell 21. The screw passes through the through hole at the top of the shell 21 and is connected to the threaded hole of the static iron core 25; or, in another embodiment, as shown in FIG. Figure 2 As shown, through holes are provided on the upper side surfaces of the housing 21 and the static iron core 25, and the fixing pin 7 passes through the through holes on the housing 21 and the static iron core 25 to fix the two.

[0053] The moving iron core 26 is coaxially arranged with the stationary iron core 25. In one embodiment, Figure 4 As shown, the moving iron core 26 includes a first part 261 arranged inside the shell 21 and a second part 262 arranged inside the valve body 1. Here, the first part 261 and the second part 262 may refer to the state in which the coil assembly is energized, the moving iron core 26 and the static iron core 25 are attached together, the part of the moving iron core 26 located in the valve body 1 is called the second part 262, and the part located in the shell 21 is called the first part 261. The first part 261 and the second part 262 may be integrally formed or separately arranged. In the present embodiment, the first part 261 and the second part 262 are integrally formed.

[0054] like Figure 7 As shown, the first portion 261 includes a first chamber 2611, and the first chamber 2611 is used to accommodate the elastic member 6. Figure 4As shown, regardless of whether the coil assembly is powered on or not, the elastic component 6 can be respectively in contact with the static iron core 25 and the moving iron core 26, that is, the top of the elastic component 6 is in contact with the static iron core 25, and the bottom is in contact with the bottom wall of the first chamber 2611. In one embodiment, the elastic component 6 can be a compression spring. When the coil assembly is powered on, the static iron core 25 drives the moving iron core 26 to move toward the static iron core 25, and the elastic component 6 is compressed. At this time, the elastic component 6 is respectively in contact with the static iron core 25 and the moving iron core 26; when the coil assembly is powered off, the electromagnetic force disappears, and the elastic component 6 is reset under the action of its elastic force, driving the moving iron core 26 to move away from the static iron core 25. At this time, the elastic component 6 is still respectively in contact with the static iron core 25 and the moving iron core 26.

[0055] The second portion 262 includes a sliding portion 2623 protruding outward, and the upward and downward movement of the sliding portion 2623 is used to control the on-off of the air path between the air inlet channel 11 and the air outlet channel 12 , or to control the on-off of the air path between the air outlet channel 12 and the exhaust channel 13 .

[0056] The support 3 is disposed in the mounting portion 15, with its top flush with the top of the valve body 1, and its bottom connected to the first boss 101 in the cavity 10. In one embodiment, Figure 4 As shown, the flange 211 at the bottom of the housing 21 extends inwardly to the interior of the housing 21, so that the bottom of the housing 21 forms a hollow portion that can only accommodate the moving iron core 26 to move up and down, and the top of the support 3 is flush with the top of the valve body 1. At the same time, the support 3 abuts against the flange 211, that is, the housing 21 abuts against the valve body 1. Figure 8 As shown, the support 3 is provided with hollowing inside. In this embodiment, the support 3 is provided with axial hollowing running through the top and bottom, which is used to accommodate the moving iron core 26, so that the moving iron core 26 can move in the support 3; the support 3 is also provided with radial hollowing for gas circulation, so that when the outlet channel 12 is connected with the exhaust channel 13, the airflow flowing into the mounting portion 15 can be connected with the exhaust channel 13 through the radial hollowing on the support 3, and discharged from the exhaust channel 13. The bottom of the support 3 is provided with a groove 31, and the groove 31 is used to set the first sealing member 4.

[0057] The first seal 4 is arranged in the cavity 10, and two first seals 4 are arranged in each cavity 10, which are respectively arranged in the groove 31 of the support 3 and in the limiting portion 16, and the first seal 4 in the groove 31 and the first seal 4 in the limiting portion 16 are symmetrical to each other. In one embodiment, when the first seal 4 is set in the forward direction, its top is at least partially flexible, that is, the first seal 4 can be made of flexible material as a whole, or only the top can be made of flexible material, or only part of the top can be made of flexible material. In this embodiment, the first seal 4 arranged in the limiting portion 16 is set in the forward direction, that is, the top of the first seal 4 in the limiting portion 16 is set in the direction of the support 3.

[0058] The moving iron core 26 passes through the support 3 and the limiting portion 16, wherein the sliding portion 2623 is movably arranged in the limiting portion 16, and the support 3 is arranged at the top of the limiting portion 16, and the first sealing member 4 arranged in reverse is arranged in the groove 31 at the bottom of the support 3, and the reverse arrangement here means that the top of the first sealing member 4 is arranged in the direction of the limiting portion 16, and the second boss 102 is arranged at the bottom of the limiting portion 16, and the first sealing member 4 arranged in a forward direction and symmetrical to the first sealing member 4 in the groove 31 is arranged on the second boss 102. In one embodiment, the sliding portion 2623 is limited between the flexible tops of two mutually symmetrical first sealing members 4. By setting the flexible top, the sealing effect of the oxygen-making valve assembly can be enhanced and the leakage phenomenon can be reduced. When the sliding portion 2623 abuts upward against the flexible top of the first seal 4 at the bottom of the groove 31, the pressurized gas is transported to the adsorption cylinder through the connection between the inlet channel 11 and the outlet channel 12. When the sliding portion 2623 abuts downward against the flexible top of the first seal 4 on the second boss 102, the nitrogen desorbed in the adsorption cylinder is discharged out of the adsorption cylinder through the connection between the outlet channel 12 and the exhaust channel 13.

[0059] In a specific embodiment, Figure 4 As shown, the oxygen valve assembly is integrated with two oxygen valves. Through the integration of the oxygen valves, the volume of the integrated oxygen valve assembly is smaller than the space occupied by the two oxygen valves in the oxygen concentrator, which is conducive to the miniaturization of the oxygen concentrator. The oxygen valve assembly is used to input compressed gas into the two adsorption cylinders, and discharge the nitrogen desorbed in the adsorption cylinder to the outside of the adsorption cylinder. The oxygen-generating valve assembly comprises a valve body 1 and two electromagnetic assemblies 2. Two cavities 10 are arranged inside the valve body 1, each cavity 10 corresponds to an electromagnetic assembly 2, and the electromagnetic assembly 2 is detachably connected to the valve body 1 through a shell 21. An air inlet channel 11 is arranged at the lower part of one side of the valve body 1 and connected to one of the extensions 19. The two extensions 19 in the valve body 1 are connected through a second channel 18. The air inlet channel 11 is used to input compressed gas into the oxygen-generating valve assembly; an air outlet channel 12 is arranged on the side of the valve body 1 adjacent to the air inlet channel 11, and two air outlet channels 12 are arranged, which correspond to two limit portions 16 respectively, and are used to transport the compressed gas to the adsorption cylinder through the valve body 1, or output the nitrogen desorbed from the adsorption cylinder to the valve body 1; an exhaust channel 13 is arranged on the upper part of the side of the valve body 1 opposite to the air inlet channel 11, and is connected to one of the mounting portions 15. The two mounting portions 15 are connected through a first channel 17. The exhaust channel 13 is used to discharge the nitrogen output into the oxygen-generating valve assembly.

[0060] Since the oxygen-generating valve assembly is provided with two electromagnetic assemblies 2, and the air flow channels inside the valve body 1 are relatively independent, oxygen can be generated separately. In order to improve the oxygen-generating efficiency, it can be set that when the coil assembly on the left is energized, the coil assembly on the right is not energized, so that the two do not generate oxygen at the same time. Therefore, when the coil assembly on the left is energized, the static iron core 25 on this side is magnetized, and the moving iron core 26 moves toward the static iron core 25 under the action of the electromagnetic force, and the elastic member 6 is compressed. At this time, the sliding portion 2623 of the moving iron core 26 abuts against the flexible top of the first sealing member 4 in the groove 31, so as to achieve the blocking of the passage between the outlet channel 12 and the exhaust channel 13, so that the compressed gas is transported to the adsorption cylinder through the connection between the inlet channel 11 and the outlet channel 12. At this time, the coil assembly on the right is set to be unpowered, the electromagnetic force disappears, and the elastic member 6 is reset under the action of the elastic force, driving the moving iron core 26 to move away from the static iron core 25, so that the sliding portion 2623 abuts against the flexible top of the first sealing member 4 in the limiting portion 16, thereby achieving the blocking of the passage between the inlet channel 11 and the outlet channel 12, so that the nitrogen in the adsorption cylinder is discharged through the connection between the outlet channel 12 and the exhaust channel 13. In this embodiment, the elastic member 6 can be a compression spring, which is compressed by the electromagnetic force generated by the coil assembly, and when the electromagnetic force disappears, the compression spring is reset under the action of the elastic force.

[0061] The utility model realizes the integration of the oxygen-generating valve by arranging at least two cavities 10 in the valve body 1, and realizes the integration of the oxygen-generating valve by the cooperation of the cavities 10 and the electromagnetic components 2, which is conducive to the miniaturization of the oxygen generator; the air flow channel structure in the valve body 1 is simple and relatively independent, and each electromagnetic component 2 does not interfere with each other, so that independent oxygen production can be realized; when the sliding part 2623 abuts against the flexible top of the first sealing member 4 at the bottom of the support 3, the communication between the air inlet channel 11 and the air outlet channel 12 can be realized, or, when the sliding part 2623 abuts against the flexible top of the first sealing member 4 in the limiting part 16, the air outlet channel 12 can be realized. The connection with the exhaust channel 13 is achieved by setting two first sealing members 4 to abut against the sliding part 2623 respectively, so the sealing effect is good and the installation process is simple, which reduces the assembly error and solves the problem of poor sealing of the oxygen making valve and air leakage of the oxygen making valve. The elastic member 6 is set in the first chamber 2611 of the moving iron core 26. Compared with setting the elastic member 6 on the outer periphery of the moving iron core 26 and reserving the installation position of the elastic member 6 on the moving iron core 26, the length of the moving iron core 26 is shortened, which is beneficial to the miniaturization of the oxygen making valve assembly, and then, it is beneficial to the miniaturization of the oxygen making machine.

[0062] In order to facilitate the limitation of the electromagnetic assembly 2, the static iron core 25 and the moving iron core 26 are kept coaxial, and the friction between the moving iron core 26 and the coil assembly is reduced when the moving iron core 26 moves. In one embodiment, as shown in FIG. Figures 2-3As shown, the oxygen-generating valve assembly further includes a positioning column 14, which is arranged at a position near the cavity 10 at the top of the valve body 1. A hole is provided at a position corresponding to the positioning column 14 at the bottom of the shell 21, and the positioning column 14 extends upward into the hole of the shell 21. In a specific embodiment, the positioning column 14 may correspond to the flange 211 of the shell 21, so the hole may be provided on the flange 211 corresponding to the positioning column 14. In another embodiment (not shown in the figure), the positioning column 14 is provided on the flange 211 at the bottom of the shell 21, and may be provided on the bottom surface of the flange 211, and is arranged toward the valve body 1. The valve body 1 is provided with a hole corresponding to the positioning column 14, and the positioning column 14 extends downward into the hole of the valve body 1.

[0063] In order to facilitate the assembly of the oxygen valve assembly, in one embodiment, Figure 4 and Fig. 9 As shown, the first sealing member 4 can be a sealing convex pad, and a pressure ring 5 is sleeved on the outer periphery of the protrusion 41 of the sealing convex pad, that is, two sealing convex pads are arranged in each cavity 10, and a pressure ring 5 is arranged between the protrusion 41 of the upper sealing convex pad and the groove 31, and a pressure ring 5 is also arranged between the protrusion 41 of the lower sealing convex pad and the limiting portion 16. Specifically, the upper pressure ring 5 can be arranged between the protrusion 41 of the upper sealing convex pad and the side wall of the groove 31, and the lower pressure ring 5 is arranged between the protrusion 41 of the lower sealing convex pad and the side wall of the limiting portion 16. The two groups of sealing convex pads and the pressure ring 5 can be respectively pressed into the groove 31 of the support 3 and the second boss 102 at the bottom of the limiting portion 16 in an interference fit manner, which is convenient to install and not easy to fall off.

[0064] In order to enhance the electromagnetic force at the contact position between the static iron core 25 and the moving iron core 26 when the coil assembly is energized, in one embodiment, Figure 4 or Figure 6 As shown, the coil assembly includes a coil 22, a skeleton 23, a first bushing 24 and a second bushing 27. The coil 22 is wound on the skeleton 23, the first bushing 24 is arranged between the skeleton 23 and the moving iron core 26, and the second bushing 27 is arranged between the skeleton 23 and the static iron core 25. By arranging the first bushing 24 and the second bushing 27, the electromagnetic force at the connection between the static iron core 25 and the moving iron core 26 can be enhanced when the coil assembly is energized. At the same time, by arranging the first bushing 24 and the second bushing 27, the friction between the skeleton 23 and the static iron core 25 and the moving iron core 26 can be reduced. In order to facilitate the power on or off of the coil assembly, in one embodiment, two pins are arranged on the top of the skeleton 23, and the input end and the output end of the coil 22 can be respectively wound on the two pins on the top of the skeleton 23, and electrically connected to the external circuit through the two pins on the skeleton 23.

[0065] In one embodiment, Figures 10-11As shown, the housing 21 includes a flange 211 at the bottom and a cylindrical side wall. In order to fix the static iron core 25 and prevent it from falling out from the top, the oxygen-making valve assembly also includes a fixing pin 7. The housing 21, the frame 23 and the static iron core 25 are connected by the fixing pin 7, which can limit the static iron core 25. Specifically, in order to facilitate the setting of the fixing pin 7 and keep the oxygen-making valve assembly beautiful, the fixing pin 7 can be set horizontally, and its length D can be greater than the diameter d1 of the circle surrounded by the inner side wall of the housing 21, and less than or equal to the diameter d2 of the circle surrounded by the outer side wall of the housing 21, so that the fixing pin 7 can not only fix the static iron core 25 through the housing 21, but also make the length of the fixing pin 7 not exceed the diameter d2 of the circle surrounded by the outer side wall of the housing 21, so as not to affect the beauty of the oxygen-making valve assembly.

[0066] In order to reduce the collision noise when the static iron core 25 contacts the moving iron core 26, in one embodiment, a flexible member may be provided at the bottom of the static iron core 25; or, an annular flexible member may be provided at the top of the moving iron core 26, and the hollow portion of the annular flexible member only accommodates the passage of the elastic member 6; furthermore, a flexible member may be provided at the bottom of the static iron core 25 and an annular flexible member may also be provided at the top of the moving iron core 26, and the provision of the flexible member and / or the annular flexible member may achieve a noise reduction effect. The flexible member may be a sealing pad, or other flexible material member that can achieve a noise reduction effect.

[0067] In order to enhance the sealing effect of the oxygen valve assembly and reduce the leakage of gas, in one embodiment, Figure 4 As shown, second seals are respectively provided between the mounting portion 15 and the support 3, between the moving iron core 26 and the support 3, and between the moving iron core 26 and the inner wall of the extension portion 19 to reduce gas overflow. The second seal can be a sealing ring, such as an O-ring or a V-ring, or other seals that have a sealing effect. Since the support 3 is provided with radial hollowing to facilitate gas circulation, second seals can be provided on the outer periphery of the side wall of the support 3, and on the upper and lower parts of the radial hollowing, that is, second seals are provided between the upper part of the support 3 and the side wall of the mounting portion 15, and between the lower part of the support 3 and the side wall of the mounting portion 15; in order to reduce the influence of the second seal on the gas path between the gas outlet channel 12 and the exhaust channel 13, the second seal between the moving iron core 26 and the support 3 can be provided in the upper part of the radial hollowing, that is, between the upper part of the support 3 and the moving iron core 26; in order to prevent gas from overflowing from between the extension portion 19 and the moving iron core 26, a second seal can be set between the lower part of the moving iron core 26 and the side wall of the extension portion 19. Since the height of the extension portion 19 is greater than the height of the second channel 18, in order not to affect the flow of gas from the air inlet channel 11 to the extension portion 19 and the second channel 18, the second seal can be set in the extension portion 19 at the lower part of the horizontal plane where the second channel 18 is located, so as not to hinder the flow of gas from the air inlet channel 11 to each extension portion 19.

[0068] Since the moving iron core 26 needs to move up and down in the cavity 10, in order to enhance the sealing performance between the moving iron core 26 and the support 3, and between the moving iron core 26 and the extension 19, and to extend the service life of the second seal, in one embodiment, a V-shaped sealing ring can be provided between the moving iron core 26 and the upper part of the support 3, and between the moving iron core 26 and the inner wall of the extension 19, which can enhance the sealing effect and reduce friction, thereby relatively extending the service life of the oxygen production valve assembly. In a specific embodiment, as Figures 6-7 As shown, the second part 262 of the moving iron core 26 also includes a first sealing part 2621 and a second sealing part 2622. A first annular groove is provided in the middle of the first sealing part 2621, and a V-shaped sealing ring can be provided in the first annular groove; a second annular groove is provided in the middle of the second sealing part 2622, and a V-shaped sealing ring can be provided in the second annular groove. The first and second annular grooves can play a role in limiting the position of the V-shaped sealing ring.

[0069] Since the electromagnetic force generated when the coil assembly is energized is relatively small, in order to prevent the moving iron core 26 from being unable to completely fit the stationary iron core 25 when the coil assembly is energized, in one embodiment, as Figures 6-7 As shown, a second chamber 2624 can be provided in the second part 262 of the moving iron core 26 to reduce the weight of the moving iron core 26. By reducing the weight of the moving iron core 26, the electromagnetic force when the coil assembly is energized can achieve the purpose of completely attracting the static iron core 25 and the moving iron core 26. At the same time, by providing the second chamber 2624 in the moving iron core 26, the weight of the oxygen making valve assembly can be reduced, which is beneficial to the miniaturization of the oxygen concentrator.

[0070] On the other hand, the utility model also provides an oxygen generator using the oxygen generator valve assembly as described above.

[0071] In a specific application scenario, the oxygen generator includes a compressor, an adsorption cylinder, a gas storage tank and the oxygen production valve assembly as described above. The compressor is connected to the adsorption cylinder through the oxygen production valve assembly, and the adsorption cylinder is connected to the gas storage tank. Oxygen is stored in the gas storage tank and delivered to the user end through the oxygen supply pipeline when the user needs oxygen.

[0072] In this embodiment, two adsorption cylinders are provided, and two cavities 10 are provided in the valve body 1 of the oxygen production valve assembly. Since the cavities 10 correspond to the electromagnetic assemblies 2, two electromagnetic assemblies 2 are also provided. The oxygen production valve assembly alternately delivers compressed gas to the adsorption cylinder A and the adsorption cylinder B, so that the adsorption cylinder A and the adsorption cylinder B alternately produce oxygen.

[0073] Here, for the sake of easy distinction, the electromagnetic component 2 can be divided into electromagnetic component A and electromagnetic component B, and the two cavities 10 in the valve body 1 can also be divided into cavity A and cavity B, and cavity A corresponds to electromagnetic component A, and cavity B corresponds to electromagnetic component B, and the air outlet channel 12 connected to the limiting portion 16 of cavity A can be called air outlet channel A, and the air outlet channel 12 connected to the limiting portion 16 of cavity B can be called air outlet channel B.

[0074] When the electromagnetic component A is powered on, the electromagnetic component B is in a power-off state. At this time, the compressor delivers compressed gas to the adsorption cylinder A through the connection between the air inlet channel 11 of the oxygen valve component and the air outlet channel A. After the coil assembly of the electromagnetic component A is powered on, the static iron core 25 on this side is magnetized, and the moving iron core 26 moves toward the static iron core 25 under the action of the electromagnetic force. The sliding part 2623 abuts against the first sealing member 4 at the bottom of the groove 31. The first sealing member 4 can be a sealing convex gasket, and the protrusion of the sealing convex gasket The portion 41 is interference fit with the inner wall of the groove 31 through the pressure ring 5, and the sliding portion 2623 abuts against the protruding portion 41. Since the sealing convex gasket is a flexible part, the sealing effect is better. The gas flows to the gas outlet channel A through the gap between the lower part of the sliding portion 2623 and the lower sealing convex gasket, and is then input into the adsorption cylinder A. Under the action of the adsorbent in the adsorption cylinder A, nitrogen is adsorbed when pressurized, and the unabsorbed oxygen is stored in the gas tank. When the user needs oxygen, the gas tank can be connected through the oxygen supply pipeline to inhale oxygen.

[0075] When the electromagnetic component B is powered off, the adsorption cylinder B is in a desorption state, and the nitrogen in the cylinder needs to be discharged through the connection between the air outlet channel B and the exhaust channel 13. At this time, the coil component on this side is in a power-off state, the electromagnetic force disappears, and the elastic member 6 is reset downward under the action of the elastic force, while driving the moving iron core 26 to move downward, so that the sliding portion 2623 abuts against the first sealing member 4 on the limiting portion 16. The first sealing member 4 is a sealing convex gasket, and the protrusion 41 of the sealing convex gasket is interference fit with the inner wall of the limiting portion 16 through the pressure ring 5, and the sliding portion 2623 abuts against the protrusion 41. Since the sealing convex gasket is a flexible member, the sealing effect is better. After the nitrogen in the adsorption cylinder B enters the air outlet channel B, it is discharged through the exhaust channel 13 through the gap between the sliding portion 2623 and the upper sealing convex gasket.

[0076] When the adsorption cylinder B is producing oxygen, the electromagnetic component B is energized. At this time, the adsorption cylinder A is in the process of desorbing and discharging nitrogen, and the electromagnetic component A is in a power-off state. Since the principle is the same as described above, it will not be repeated here.

[0077] In this embodiment, after the compressor pressurizes the external low-pressure gas into high-pressure gas, the compressed gas is alternately delivered to the two adsorption cylinders through the oxygen production valve assembly. When the adsorption cylinder A is pressurized to adsorb and produce oxygen, the adsorption cylinder B is decompressed to desorb and discharge nitrogen. When the adsorption cylinder A is decompressed to desorb and discharge nitrogen, the adsorption cylinder B is pressurized to adsorb and produce oxygen. The oxygen produced by the adsorption cylinder A and the adsorption cylinder B is stored in a gas storage tank and transmitted to the user end through the oxygen supply pipeline when the user needs oxygen. In order to reduce the nitrogen exhaust noise of the adsorption cylinder A and the adsorption cylinder B, an exhaust muffler can also be connected to the outlet end of the exhaust channel 13 of the oxygen production valve assembly to alleviate the nitrogen exhaust noise.

[0078] The above description is an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An oxygen production valve assembly, characterized in that: include, A valve body, wherein at least two relatively independent cavities are arranged inside, each of the cavities is provided with a mounting portion, a limiting portion and an extending portion in sequence from top to bottom, a plurality of the mounting portions are connected through a first channel, and a plurality of the extending portions are connected through a second channel; and an air intake passage, disposed on the valve body and connected to one of the extensions; and an air outlet channel, which is arranged on the valve body and connected to the limiting portion, and the limiting portion corresponds to the air outlet channel one by one; and An exhaust passage, disposed on the valve body and connected to one of the mounting portions; and An electromagnetic assembly is arranged opposite to the cavity, and comprises a shell, wherein the shell is arranged on the upper part of the valve body and is fixedly connected or detachably connected to the valve body, and a coil assembly is arranged inside the shell; and A static iron core is disposed inside the shell and is detachably connected to the shell; the static iron core is sleeved inside the coil assembly; and The moving iron core is coaxially arranged with the stationary iron core, and comprises a first part arranged inside the housing and a second part arranged inside the valve body, wherein the first part is provided with a first chamber for accommodating the elastic member, and the second part is provided with a sliding part protruding outward; and A support, arranged in the mounting portion, with its top flush with the top of the valve body, and its bottom connected to the first boss, the support having a hollow interior and a groove at its bottom; and A first sealing member is disposed in the cavity, two first sealing members are disposed in each cavity, and the two first sealing members are symmetrically disposed in the groove and the limiting portion, respectively, and the top of the first sealing member is at least partially flexible; The sliding part is movably arranged in the limiting part, slides up and down along the axial direction thereof, and is limited between the flexible tops of the two first sealing members.

2. The oxygen production valve assembly according to claim 1, characterized in that: It also includes a positioning column, which is arranged at a position on the top of the valve body close to the cavity, and a hole corresponding to the positioning column is arranged at the bottom of the shell, and the positioning column extends upward into the hole; or, It also includes a positioning column, which is arranged on the flange at the bottom of the shell and faces the valve body. The valve body is provided with a hole corresponding to the positioning column, and the positioning column extends downward into the hole.

3. The oxygen production valve assembly according to claim 2, characterized in that: The first sealing member is a sealing convex gasket, a pressure ring is arranged between the protruding portion of one sealing convex gasket and the groove, and a pressure ring is arranged between the protruding portion of the other sealing convex gasket and the limiting portion.

4. The oxygen production valve assembly according to claim 3, characterized in that: The coil assembly includes a coil, a frame, a first bushing and a second bushing. The coil is wound on the frame. The first bushing is arranged between the frame and the moving iron core. The second bushing is arranged between the frame and the stationary iron core.

5. The oxygen production valve assembly according to claim 4, characterized in that: It also includes a fixing pin, and the housing, the frame and the static iron core are connected by the fixing pin.

6. The oxygen production valve assembly according to claim 1, characterized in that: A flexible member is disposed at the bottom of the static iron core, and / or an annular flexible member is disposed at the top of the moving iron core.

7. The oxygen production valve assembly according to claim 5 or 6, characterized in that: Second sealing members are respectively arranged between the mounting portion and the support, between the moving iron core and the support, and between the moving iron core and the inner wall of the extending portion.

8. The oxygen production valve assembly according to claim 7, characterized in that: A V-shaped sealing ring is arranged between the moving iron core and the upper part of the support, and between the moving iron core and the inner wall of the extending part.

9. The oxygen production valve assembly according to claim 8, characterized in that: A second chamber is arranged in the moving iron core.

10. An oxygen concentrator, characterized in that: Use the oxygen-generating valve assembly according to any one of claims 1 to 9.

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