A compression separation synchronous oxygen production device

Abstract

The present invention provides a compression separation synchronous oxygen production device, including a cylinder, a piston, a driving mechanism and a control system. A cylinder air inlet is provided at one end of the cylinder, a cylinder exhaust port is provided at the other end, an exhaust valve is provided at the cylinder exhaust port, a molecular sieve is provided in the piston, a piston air inlet hole is provided at the end of the piston close to the cylinder air inlet, a one-way valve is provided at the piston air inlet hole, a piston exhaust hole is provided at the end of the piston close to the cylinder exhaust port, a control system controls the driving mechanism to make the piston reciprocate in the cylinder, and the control system is also used to control the opening and closing of the exhaust valve. The beneficial effects of the present invention are: providing a compression separation synchronous oxygen production device with a reasonable structure that combines a molecular sieve with a compressor, through which the working mechanism of the compressor can be fully utilized to produce oxygen, greatly improving the oxygen production efficiency, saving component costs, making the overall size of the device more compact, and being applicable to more occasions, greatly increasing the applicability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen production devices, and in particular to a compression separation synchronous oxygen production device. Background Art

[0002] Molecular sieve pressure swing adsorption (PSA) is a common method for producing oxygen. The principle is that when air is pressurized to a certain pressure, the molecular sieve absorbs nitrogen molecules from the air flowing through it, while the oxygen passes through the sieve and is collected as oxygen-rich gas. When the air pressure drops to a certain level, the nitrogen-adsorbed molecular sieve desorbs. Flushing the molecular sieve with a small amount of oxygen-rich gas activates the molecular sieve and restores its nitrogen absorption capacity. However, existing molecular sieve oxygen generators typically utilize a separate compressor and molecular sieve, making them difficult to miniaturize. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide a compact and efficient compression separation synchronous oxygen production device with reasonable structure in view of the deficiencies of the existing technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a compression separation synchronous oxygen production device, including a cylinder, a piston, a driving mechanism and a control system, one end of the cylinder is provided with a cylinder air inlet, the other end of the cylinder is provided with a cylinder exhaust port, the cylinder exhaust port is provided with an exhaust valve, a molecular sieve is provided in the piston, the end of the piston close to the cylinder air inlet is provided with a piston air inlet hole, the piston air inlet hole is provided with a one-way valve, the end of the piston close to the cylinder exhaust port is provided with a piston exhaust hole, the control system controls the driving mechanism to make the piston reciprocate in the cylinder, and the control system is also used to control the opening and closing of the exhaust valve.

[0005] Furthermore, the cylinder exhaust port includes a first exhaust port and a second exhaust port, and the exhaust valve includes a first exhaust valve and a second exhaust valve, the first exhaust valve is used to control the opening and closing of the first exhaust port, and the second exhaust valve is used to control the opening and closing of the second exhaust port.

[0006] Furthermore, the second exhaust valve is a pressure valve.

[0007] Furthermore, the piston air inlet and the piston air exhaust holes of the piston are staggered.

[0008] Furthermore, a molecular sieve filter is provided between the molecular sieve of the piston and the piston air inlet; and a molecular sieve filter is provided between the molecular sieve of the piston and the piston exhaust hole.

[0009] Furthermore, the molecular filter is an activated alumina filter or other filter with moisture absorption capacity.

[0010] Furthermore, an air pressure sensor is provided in the cylinder body, and the air pressure sensor is connected to the control system.

[0011] Furthermore, a piston position sensor is included, and the piston position sensor is used to detect the position of the piston in the cylinder.

[0012] Furthermore, the piston includes a piston body, an upper cover and a lower cover. The piston body is cylindrical, and the upper cover and the lower cover are detachably arranged at both ends of the piston body.

[0013] Furthermore, the upper cover is connected to the piston body through threads; the lower cover is connected to the piston body through threads.

[0014] The beneficial effects of the present invention are: providing a compression separation synchronous oxygen production device with a reasonable structure that combines a molecular sieve with a compressor. Through this device, the working mechanism of the compressor can be fully utilized to produce oxygen, thereby greatly improving the oxygen production efficiency, saving component costs, making the overall size of the device more compact, and being applicable to more occasions, thereby greatly increasing the applicability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific structure of the present invention is described in detail below with reference to the accompanying drawings:

[0016] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0017] Figure 2 Schematic diagram of the explosion structure of the piston of the present invention;

[0018] Figure 3 is a schematic diagram of the overall structure of another embodiment of the present invention;

[0019] 1-cylinder; 101-cylinder air inlet; 102-cylinder exhaust port; 103-exhaust valve; 112-first exhaust port; 113-first exhaust valve; 114-second exhaust port; 115-second exhaust valve;

[0020] 2-piston; 21-molecular sieve; 22-one-way valve; 23-molecular sieve filter; 24-upper cover; 241-piston exhaust hole; 25-lower cover; 251-piston air inlet hole;

[0021] 3- driving mechanism; 4- three-way valve; 5- oxygen collection tank. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0025] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0028] Example 1

[0029] See also Figure 1 as well as Figure 2 A compression separation synchronous oxygen production device includes a cylinder, a piston, a driving mechanism and a control system. One end of the cylinder is provided with a cylinder air inlet 101, which is connected to the atmosphere. The other end of the cylinder is provided with a cylinder exhaust port 102, and the cylinder exhaust port 102 is provided with an exhaust valve 103. The exhaust valve 103 is connected to the first port of the three-way valve 4, the second port of the three-way valve 4 is connected to the oxygen collection tank 5, and the third port of the three-way valve 4 is connected to the nitrogen tank or the exhaust port of the device.

[0030] A molecular sieve 21 is provided in the piston 2, and a piston air inlet hole 251 is provided at one end of the piston 2 close to the cylinder air inlet, and a one-way valve 22 is provided at the piston air inlet hole 251. The piston 2 is provided at one end close to the cylinder exhaust port with a piston exhaust hole 241. It should be noted that the space formed between the cylinder air inlet and the one-way valve is the intake space, and the space formed between the one-way valve and the exhaust port is the exhaust space. During the movement of the piston, the volumes of the intake space and the exhaust space are constantly changing. The one-way valve can allow air to flow from the intake space to the exhaust space, while preventing the gas in the exhaust space from entering the intake space.

[0031] The control system controls the driving mechanism to make the piston reciprocate in the cylinder. Specifically, the driving mechanism includes a driving rod and a driving motor. The driving motor is a linear reciprocating motor. The driving motor drives the driving rod to perform linear reciprocating motion, thereby driving the piston to perform linear reciprocating motion in the cylinder.

[0032] The control system is also used to control the opening and closing of the exhaust valve. When the air pressure in the cylinder reaches a preset pressure, the control system controls the exhaust valve to open, so that the gas in the exhaust space is discharged from the cylinder exhaust port.

[0033] In this embodiment, the piston is initially located on the side of the cylinder air inlet at the bottom of the cylinder. When the piston starts to move toward the cylinder exhaust port, the cylinder air inlet is connected to the atmosphere. Air enters the interior of the piston through the one-way valve of the piston air inlet and enters the space above the piston through the piston exhaust hole. At this time, the control system controls the exhaust valve to be in a closed state.

[0034] The piston continues to move toward the cylinder exhaust port, gradually compressing the air in the exhaust space. When the air pressure in the exhaust space reaches the molecular sieve nitrogen and oxygen separation pressure value, the nitrogen in the air in the exhaust space is adsorbed in the molecular sieve inside the piston, and the oxygen is separated.

[0035] The piston continues to move toward the cylinder exhaust port. When the air pressure in the exhaust space reaches the preset opening value, the control system controls the exhaust valve to open, and oxygen is discharged from the cylinder exhaust port. At the same time, the control system controls the three-way valve to connect the oxygen collection tank with the cylinder exhaust port. Oxygen is collected by the oxygen collection tank, and the air pressure in the exhaust space gradually decreases. When the air pressure in the exhaust space drops to the preset closing value, the control system controls the three-way valve to connect the exhaust space to the nitrogen tank or to the exhaust port of the device, and the piston begins to move toward the cylinder inlet. At this time, the air pressure in the exhaust space continues to decrease. When the air pressure drops to the pressure at which the molecular sieve desorbs nitrogen, the nitrogen is separated from the molecular sieve. At this time, because the air pressure in the exhaust space is still greater than atmospheric pressure, the air in the intake space cannot enter the exhaust space through the one-way valve, and the nitrogen is discharged through the exhaust port. Until the air pressure in the exhaust space is consistent with the external atmospheric pressure, or when the piston moves to the bottom of the cylinder, the control system controls the exhaust valve to close, and one oxygen production cycle is completed. Then the piston begins to move toward the cylinder exhaust port again, and the next oxygen production cycle begins. The driving motor works continuously and repeatedly executes multiple cycles to achieve the purpose of continuous oxygen production.

[0036] As can be seen from the above description, the beneficial effects of the present invention are: providing a compression separation synchronous oxygen production device with a reasonable structure that combines a molecular sieve with a compressor. Through this device, the working mechanism of the compressor can be fully utilized to produce oxygen, which greatly improves the oxygen production efficiency, saves component costs, makes the overall size of the device more compact, can be used in more occasions, and greatly increases the applicability of the product.

[0037] Example 2

[0038] Based on Example 1, the cylinder exhaust port includes a first exhaust port 112 and a second exhaust port 114, and the exhaust valve includes a first exhaust valve 113 and a second exhaust valve 115. The first exhaust valve 113 is used to control the opening and closing of the first exhaust port 112, and the second exhaust valve 115 is used to control the opening and closing of the second exhaust port 114.

[0039] In this embodiment, in order to further save the components of the device to reduce the volume and simplify the structure, please refer to Figure 2 as well as Figure 3 A compression separation synchronous oxygen production device includes a cylinder 1, a piston 2, a drive mechanism 3 and a control system. One end of the cylinder 1 is provided with a cylinder air inlet 101, and the cylinder air inlet 101 is connected to the atmosphere. The other end of the cylinder 1 is provided with a cylinder exhaust port, and the cylinder exhaust port is provided with an exhaust valve, wherein there are two cylinder exhaust ports, including a first exhaust port 112 and a second exhaust port 114, and there are two exhaust valves, including a first exhaust valve 113 and a second exhaust valve 115, wherein the first exhaust port 112 is connected to the oxygen collection tank through the first exhaust valve 113, and the second exhaust port 114 is connected to the exhaust port of the nitrogen collection tank or the device through the second exhaust valve 115.

[0040] A molecular sieve 21 is provided in the piston 2, and a piston air inlet hole 251 is provided at one end of the piston 2 close to the cylinder air inlet, and a one-way valve 22 is provided at the piston air inlet hole 251. The piston 2 is provided at one end close to the cylinder exhaust port with a piston exhaust hole 241. It should be noted that the space formed between the cylinder air inlet and the one-way valve is the intake space, and the space formed between the one-way valve and the exhaust port is the exhaust space. During the movement of the piston, the volumes of the intake space and the exhaust space are constantly changing. The one-way valve can allow air to flow from the intake space to the exhaust space, while preventing the gas in the exhaust space from entering the intake space.

[0041] The control system controls the driving mechanism to make the piston reciprocate in the cylinder. Specifically, the driving mechanism includes a driving rod and a driving motor. The driving motor is a linear reciprocating motor. The driving motor drives the driving rod to perform linear reciprocating motion, thereby driving the piston to perform linear reciprocating motion in the cylinder.

[0042] The control system is also used to control the opening and closing of the first exhaust valve and the second exhaust valve. When the air pressure in the cylinder reaches a preset exhaust oxygen pressure value, the control system controls the first exhaust valve to open, so that the oxygen-rich gas in the exhaust space is discharged from the first exhaust port. When the air pressure in the cylinder reaches a preset exhaust nitrogen pressure value, the control system controls the first exhaust valve to close and controls the second exhaust valve to open, so that the nitrogen-rich gas in the exhaust space is discharged from the second exhaust port.

[0043] Specifically, the piston is initially located on the side of the cylinder air inlet at the bottom of the cylinder. When the piston starts to move toward the cylinder exhaust port, the cylinder air inlet is connected to the atmosphere. Air enters the piston through the one-way valve of the piston air inlet and enters the space above the piston through the piston exhaust hole. At this time, the control system controls the first exhaust valve and the second exhaust valve to be in a closed state.

[0044] The piston continues to move toward the cylinder exhaust port, gradually compressing the air in the exhaust space. When the air pressure in the exhaust space reaches the molecular sieve nitrogen and oxygen separation pressure value, the nitrogen in the air in the exhaust space is adsorbed in the molecular sieve inside the piston, and the oxygen is separated.

[0045] The piston continues to move toward the cylinder exhaust port. When the air pressure in the exhaust space reaches a preset oxygen exhaust pressure value, the control system controls the first exhaust valve to open, and the oxygen-rich gas is discharged from the first exhaust port and collected by the oxygen collection tank. The air pressure in the exhaust space gradually decreases. When the air pressure in the exhaust space drops to a preset nitrogen exhaust pressure value, the control system controls the first exhaust valve to close and the second exhaust valve to open. The piston begins to move toward the cylinder inlet. At this time, the air pressure in the exhaust space continues to decrease. When the air pressure drops to the pressure at which the molecular sieve desorbs nitrogen, the nitrogen is separated from the molecular sieve. At this time, since the air pressure in the exhaust space is still greater than the atmospheric pressure, the air in the intake space cannot enter the exhaust space through the one-way valve, and the nitrogen-rich gas is discharged through the exhaust port until the air pressure in the exhaust space is consistent with the external atmospheric pressure, or when the piston moves to the bottom of the cylinder, the control system controls the second exhaust valve to close, and one oxygen production cycle is completed. Then the piston starts to move toward the cylinder exhaust port again to start the next oxygen production cycle. The driving motor works continuously and repeatedly executes multiple cycles to achieve the purpose of continuous oxygen production.

[0046] Example 3

[0047] Based on Example 2, the first exhaust valve 113 is a pressure valve.

[0048] In this embodiment, the first exhaust valve adopts a pressure valve, which allows the air pressure to automatically open when the preset exhaust pressure value is reached. When the air pressure is lower than the preset exhaust pressure value, the pressure valve will automatically close, eliminating the intervention of the control system and further simplifying the complexity of the device.

[0049] Example 4

[0050] On the basis of Example 3, the piston air inlet and the piston exhaust hole of the piston are staggered.

[0051] In this embodiment, the piston air inlet hole and the piston exhaust hole are staggered, which can increase the stroke of the gas in the piston and enhance the adsorption effect of the molecular sieve in the piston.

[0052] Example 5

[0053] On the basis of Example 4, a molecular sieve filter 23 is provided between the molecular sieve of the piston and the piston air inlet; and a molecular sieve filter 23 is provided between the molecular sieve of the piston and the piston exhaust hole.

[0054] In this embodiment, molecular sieve filters are provided between the molecular sieve and the piston air inlet and between the molecular sieve and the piston exhaust, which can effectively prevent foreign matter from entering the molecular sieve and causing blockage, thereby effectively extending the service life of the piston molecular sieve.

[0055] Example 6

[0056] Based on Example 5, the molecular filter is an activated alumina filter or other filter with moisture absorption capacity.

[0057] In this embodiment, since water vapor affects the adsorption capacity of the molecular sieve, using a filter with good moisture absorption effect can effectively increase the service life of the molecular sieve.

[0058] Example 7

[0059] Based on Example 6, an air pressure sensor is provided in the cylinder body, and the air pressure sensor is connected to the control system.

[0060] In this embodiment, an air pressure sensor is used to monitor the air pressure inside the cylinder, which allows the control system to more accurately control the opening and closing timing of the first exhaust valve and the second exhaust valve, thereby increasing the oxygen production efficiency.

[0061] Example 8

[0062] Based on Example 7, it further includes a piston position sensor, which is used to detect the position of the piston in the cylinder.

[0063] In this embodiment, by using the air pressure sensor and the piston position sensor in conjunction, the control system can more accurately control the opening and closing timing of the first exhaust valve and the second exhaust valve, thereby increasing the oxygen production efficiency.

[0064] Example 9

[0065] On the basis of Example 8, the piston includes a piston body, an upper cover 24 and a lower cover 25. The piston body is cylindrical, and the upper cover 24 and the lower cover 25 are detachably arranged at both ends of the piston body.

[0066] In this embodiment, the use of a detachable piston can more conveniently maintain the molecular sieve in the piston.

[0067] Example 10

[0068] On the basis of Example 9, the upper cover 24 is connected to the piston body through threads; the lower cover 25 is connected to the piston body through threads.

[0069] In this embodiment, the threaded connection method can make the maintenance of the piston more convenient.

[0070] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structures or equivalent process changes made using the contents of the present invention's description and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A compression separation synchronous oxygen production device, characterized by: The invention comprises a cylinder, a piston, a driving mechanism and a control system, wherein one end of the cylinder is provided with a cylinder air inlet, the other end of the cylinder is provided with a cylinder exhaust port, the cylinder exhaust port is provided with an exhaust valve, a molecular sieve is provided in the piston, the end of the piston close to the cylinder air inlet is provided with a piston air inlet hole, the piston air inlet hole is provided with a one-way valve, and the end of the piston close to the cylinder exhaust port is provided with a piston exhaust hole, the control system controls the driving mechanism to make the piston reciprocate in the cylinder, and the control system is also used to control the opening and closing of the exhaust valve; The space formed between the cylinder air inlet and the one-way valve is the intake space, and the space formed between the one-way valve and the cylinder exhaust port is the exhaust space. During the movement of the piston, the volumes of the intake space and the exhaust space are constantly changing. The one-way valve allows air to flow from the intake space to the exhaust space, while preventing gas in the exhaust space from entering the intake space. The cylinder exhaust port includes a first exhaust port and a second exhaust port, and the exhaust valve includes a first exhaust valve and a second exhaust valve, the first exhaust valve is used to control the opening and closing of the first exhaust port, and the second exhaust valve is used to control the opening and closing of the second exhaust port; The first exhaust valve and the second exhaust valve are both pressure valves; The piston air inlet and the piston exhaust holes are staggered. A molecular sieve filter is provided between the molecular sieve of the piston and the piston air inlet; and a molecular sieve filter is provided between the molecular sieve of the piston and the piston exhaust hole.

2. The compression separation synchronous oxygen production device according to claim 1, characterized in that: The molecular sieve filter is an activated alumina filter or other filter with moisture absorption capacity.

3. The compression separation synchronous oxygen production device according to claim 2, characterized in that: An air pressure sensor is provided in the cylinder body and is connected to the control system.

4. The compression separation synchronous oxygen production device according to claim 3, characterized in that: A piston position sensor is also included, and the piston position sensor is used to detect the position of the piston in the cylinder.

5. The compression separation synchronous oxygen production device according to claim 4, characterized in that: The piston comprises a piston body, an upper cover and a lower cover. The piston body is cylindrical. The upper cover and the lower cover are detachably arranged at both ends of the piston body.

6. The compression separation synchronous oxygen production device according to claim 5, characterized in that: The upper cover is connected to the piston body through threads; the lower cover is connected to the piston body through threads.

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