VPSA portable oxygen generator

Abstract

The utility model provides a VPSA portable oxygen generator. The VPSA portable oxygen generator comprises a shell, a base, an air compressor, an air inlet assembly, a molecular sieve tube, a washing sieve assembly, a valve assembly, a sensor, a tank body assembly and an oxygen outlet nozzle. The air compressor and the molecular sieve tube are both arranged on the base, the air compressor is connected with the molecular sieve tube through the air inlet assembly, the molecular sieve tube is connected with the washing and screening assembly, the washing and screening assembly is connected with the tank assembly through the valve assembly, the sensor is arranged on the tank assembly, and the oxygen outlet nozzle is connected with the tank assembly. And the shell is connected with the base. When the VPSA portable oxygen generator is used, the positive and negative pressure pump is used as a power source, the VPSA oxygen generation principle is adopted, the production difficulty of the oxygen generator can be reduced, the production cost can be reduced, meanwhile, the positive and negative pressure pump is simpler in structure, small in size and light in weight, the size and the mass of the whole machine can be reduced, and the oxygen generator using the positive and negative pressure pump is lower in operation power and more stable in operation. And the endurance time of the whole machine is longer, the use of a user is facilitated, and the aim of portability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen concentrator equipment, in particular to a VPSA portable oxygen concentrator. Background Art

[0002] Pressure swing adsorption (PSA) is a common oxygen production technology. This method of oxygen production requires the use of two towers in parallel to alternately perform high-pressure adsorption and low-pressure desorption processes of nitrogen to obtain a stable output of high-concentration oxygen.

[0003] Vacuum pressure swing adsorption (VPSA) is based on pressure swing adsorption. By creating a negative pressure low-pressure environment, the nitrogen in the adsorbent is extracted to restore its strong adsorption capacity for nitrogen molecules, thereby facilitating the adsorption of nitrogen in the next cycle.

[0004] Currently, most oxygen production equipment uses the PSA oxygen production method. The desorption process often has the phenomenon of insufficient desorption, which seriously reduces the adsorption capacity of the adsorbent for nitrogen, and ultimately affects the oxygen output concentration and flow rate of the oxygen production equipment; and a few equipment using VPSA oxygen production technology, because they mostly use four-cylinder and other multi-cylinder forms, will increase the size and weight of the oxygen production equipment, and the production cost of the whole machine will be higher, and its operating power will be greater, which will seriously reduce the endurance time of the oxygen generator. Utility Model Content

[0005] In order to solve the above problems, the utility model adopts the following technical solutions: a VPSA portable oxygen concentrator, comprising: a shell, a base, an air compressor, an air intake assembly, a molecular sieve tube, a sieve washing assembly, a valve assembly, a sensor, a tank assembly and an oxygen outlet nozzle;

[0006] The air compressor and the molecular sieve tube are both arranged on the base, the air compressor is connected to the molecular sieve tube through the air intake assembly, the molecular sieve tube is connected to the sieve washing assembly, and the sieve washing assembly is connected to the tank assembly through the valve assembly, the sensor is arranged on the tank assembly, and the oxygen outlet nozzle is connected to the tank assembly;

[0007] The shell is connected to the base, and the shell covers the outside of the air compressor, the air intake assembly, the molecular sieve tube, the screen washing assembly, the valve assembly, the sensor and the tank assembly.

[0008] Furthermore, the air compressor comprises a pump cover and positive and negative pressure pumps, the positive and negative pressure pumps are arranged on the base, and the pump cover covers the outer sides of the positive and negative pressure pumps.

[0009] Further, the positive and negative pressure pumps include a motor, a positive pressure cylinder and a negative pressure cylinder, a positive pressure cylinder end cover is provided at one end of the positive pressure cylinder, a positive pressure air inlet is provided at the other end, a positive pressure exhaust port is provided on the positive pressure cylinder end cover, the positive pressure air inlet is located on one side of the positive pressure cylinder, and the positive pressure exhaust port is located on the other side of the positive pressure cylinder, a negative pressure cylinder end cover is provided at one end of the negative pressure cylinder, a negative pressure air inlet is provided on one side of the negative pressure cylinder, and the negative pressure exhaust port is located on the other side of the negative pressure cylinder, the positive pressure air inlet and the positive pressure exhaust port are both connected to the interior of the positive pressure cylinder, and the negative pressure air inlet and the negative pressure exhaust port are both connected to the interior of the negative pressure cylinder.

[0010] Furthermore, the positive and negative pressure pumps include a motor, a positive pressure cylinder and a negative pressure cylinder, the positive pressure cylinder is provided with a positive pressure cylinder end cover, and the positive pressure cylinder end cover is provided with a positive pressure air inlet and a positive pressure exhaust port, the positive pressure air inlet and the positive pressure exhaust port are both connected to the interior of the positive pressure cylinder, the negative pressure cylinder is provided with a negative pressure cylinder end cover, and the negative pressure cylinder end cover is provided with a negative pressure air inlet and a negative pressure exhaust port, the negative pressure air inlet and the negative pressure exhaust port are both connected to the interior of the negative pressure cylinder.

[0011] Furthermore, the positive and negative pressure pumps include a motor, a positive pressure cylinder and a negative pressure cylinder, a positive pressure cylinder end cover is provided on one end of the positive pressure cylinder, and a positive pressure air inlet and a positive pressure exhaust port are opened at the other end, and the positive pressure air inlet and the positive pressure exhaust port are both connected to the interior of the positive pressure cylinder, and a negative pressure cylinder end cover is provided on one end of the negative pressure cylinder, and a negative pressure air inlet and a negative pressure exhaust port are opened at the other end, and the negative pressure air inlet and the negative pressure exhaust port are both connected to the interior of the negative pressure cylinder.

[0012] Furthermore, the air intake assembly includes an air intake seat and a transfer tube, the positive and negative pressure pumps are connected to one end of the transfer tube through the air intake seat, and the other end of the transfer tube is connected to the molecular sieve tube.

[0013] Furthermore, the valve assembly includes a one-way valve, a rhythm valve, a pulse valve and a rhythm valve seat, the molecular sieve tube is connected to the one-way valve through the screen washing assembly, and the one-way valve is connected to the pulse valve, the rhythm valve is arranged on the rhythm valve seat, and the rhythm valve is used to connect to the molecular sieve tube.

[0014] Furthermore, the tank assembly includes a gas storage tank and a nitrogen exhaust buffer tank, the gas storage tank is connected to the pulse valve, the sensor is used to detect the gas storage tank, and the gas storage tank is connected to the oxygen outlet nozzle, and the nitrogen exhaust buffer tank is connected to the negative pressure cylinder.

[0015] Furthermore, the sensor is an oxygen concentration sensor.

[0016] The beneficial effects of the utility model are as follows: using this VPSA portable oxygen concentrator, with positive and negative pressure pumps as power sources and adopting the VPSA oxygen production principle, the difficulty of producing the oxygen concentrator can be reduced and the production cost can be reduced. At the same time, the positive and negative pressure pumps have a simpler structure, a small size and a light weight, which can reduce the size and weight of the entire machine. In addition, the oxygen concentrator using the positive and negative pressure pumps has a lower operating power, which can extend the battery life of the entire machine, making it more convenient for users to use and achieving the purpose of portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0018] Figure 1 A schematic diagram of the overall structure of a VPSA portable oxygen concentrator provided by an embodiment;

[0019] Figure 2 An exploded schematic diagram of a VPSA portable oxygen concentrator provided by an embodiment;

[0020] Figure 3 A schematic diagram of a positive and negative pressure pump in one direction provided by an embodiment;

[0021] Figure 4 A schematic diagram of one direction of a positive and negative pressure pump provided in another embodiment. DETAILED DESCRIPTION

[0022] The following will further describe the technical solution of the utility model in conjunction with the drawings of the embodiments of the utility model, and the utility model is not limited to the following specific implementation methods. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0023] like Figure 1 to Figure 2As shown, a VPSA portable oxygen concentrator includes: a shell 100, a base 200, an air compressor 300, an air intake assembly, a molecular sieve tube 500, a sieve washing assembly 600, a valve assembly, a sensor 800, a tank assembly and an oxygen outlet nozzle. The air compressor 300 and the molecular sieve tube 500 are both arranged on the base 200, the air compressor 300 is connected to the molecular sieve tube 500 through the air intake assembly, the molecular sieve tube 500 is connected to the sieve washing assembly 600, and the sieve washing assembly 600 is connected to the tank assembly through the valve assembly, the sensor 800 is arranged on the tank assembly, and the oxygen outlet nozzle is connected to the tank assembly. The shell 100 is connected to the base 200, and the shell 100 covers the outside of the air compressor 300, the air intake assembly, the molecular sieve tube 500, the sieve washing assembly 600, the valve assembly, the sensor 800 and the tank assembly. Specifically, the air compressor 300 includes a pump cover and positive and negative pressure pumps. The positive and negative pressure pumps are arranged on the base 200, and the pump cover covers the outer sides of the positive and negative pressure pumps.

[0024] like Figure 3 As shown, in one embodiment, the positive and negative pressure pumps include a motor 301, a positive pressure cylinder 302 and a negative pressure cylinder 303, one end of the positive pressure cylinder 302 is provided with a positive pressure cylinder end cover 304, the other end is provided with a positive pressure air inlet 306, the positive pressure cylinder end cover 304 is provided with a positive pressure exhaust port 307, the positive pressure air inlet 306 is located on one side of the positive pressure cylinder 302, the positive pressure exhaust port 307 is located on the other side of the positive pressure cylinder 302, and one end of the negative pressure cylinder 303 is provided with a negative pressure cylinder end cover 305 , and a negative pressure air inlet 308 is opened on one side of the negative pressure cylinder 303, and a negative pressure exhaust port 309 is opened on the negative pressure cylinder end cover 305, the negative pressure air inlet 308 is located on one side of the negative pressure cylinder 303, and the negative pressure exhaust port 309 is located on the other side of the negative pressure cylinder 303, the positive pressure air inlet 306 and the positive pressure exhaust port 307 are both connected to the interior of the positive pressure cylinder 302, and the negative pressure air inlet 308 and the negative pressure exhaust port 309 are both connected to the interior of the negative pressure cylinder 303.

[0025] That is to say, the positive pressure inlet of the positive pressure cylinder is arranged on one side, the positive pressure exhaust port is arranged on the other side, the negative pressure inlet of the negative pressure cylinder is arranged on one side, and the negative pressure exhaust port is arranged on the other side. This arrangement can flexibly change the position of the inlet and the outlet according to the structural design of the oxygen concentrator, so that the internal pipeline of the oxygen concentrator is simpler and more beautiful, reduce the complexity of production, and save man-hours; that is to say, as long as the positive pressure inlet and the positive pressure exhaust port of the positive pressure cylinder are arranged on both sides of the positive pressure cylinder, and the negative pressure inlet and the negative pressure exhaust port of the negative pressure cylinder are arranged on both sides of the negative pressure cylinder, the above effect can be achieved. As for the specific positive pressure inlet, positive pressure exhaust port, negative pressure inlet and negative pressure exhaust port should be opened at which specific position, it is not limited in this embodiment. At the same time, by distributing the positive pressure inlet and the positive pressure exhaust port on both sides of the positive pressure cylinder, and distributing the negative pressure inlet and the negative pressure exhaust port on both sides of the negative pressure cylinder, it is possible to effectively avoid mutual interference between the inlet and outlet airflows and reduce the noise generated by aerodynamic turbulence.

[0026] like Figure 4 As shown, in one embodiment, the positive and negative pressure pumps include a motor 310, a positive pressure cylinder 320 and a negative pressure cylinder 330, the positive pressure cylinder 320 is provided with a positive pressure cylinder end cover 340, and the positive pressure cylinder end cover 340 is provided with a positive pressure air inlet 341 and a positive pressure exhaust port 342, the positive pressure air inlet 341 and the positive pressure exhaust port 342 are both connected to the interior of the positive pressure cylinder 320, the negative pressure cylinder 330 is provided with a negative pressure cylinder end cover 350, and the negative pressure cylinder end cover 350 is provided with a negative pressure air inlet 351 and a negative pressure exhaust port 352, the negative pressure air inlet 351 and the negative pressure exhaust port 352 are both connected to the interior of the negative pressure cylinder 330.

[0027] That is to say, by opening the positive pressure air inlet and the positive pressure air outlet on one side of the positive pressure cylinder, the air inlet and the air outlet can be arranged symmetrically, making the overall design simpler and ensuring that the overall structure is more compact, so that the overall mass and volume can be smaller. Similarly, by opening the negative pressure air inlet and the negative pressure air outlet on one side of the negative pressure cylinder, the air inlet and the air outlet can be arranged symmetrically, making the overall design simpler and ensuring that the overall structure is more compact. Furthermore, using this positive and negative pressure pump, the positive and negative pressure can be realized simply and quickly, the processing and production process is more convenient, and the overall production and assembly cost is low.

[0028] In one embodiment, the positive and negative pressure pumps include a motor (not shown), a positive pressure cylinder (not shown) and a negative pressure cylinder (not shown). A positive pressure cylinder end cover (not shown) is provided on one end of the positive pressure cylinder, and a positive pressure air inlet (not shown) and a positive pressure exhaust port (not shown) are provided on the other end. The positive pressure air inlet and the positive pressure exhaust port are both connected to the interior of the positive pressure cylinder. A negative pressure cylinder end cover (not shown) is provided on one end of the negative pressure cylinder, and a negative pressure air inlet (not shown) and a negative pressure exhaust port (not shown) are provided on the other end. The negative pressure air inlet and the negative pressure exhaust port are both connected to the interior of the negative pressure cylinder. That is to say, the positive-pressure cylinder end cover is used to cover the positive-pressure cylinder, and the negative-pressure cylinder end cover is used to cover the negative-pressure cylinder. The positive-pressure air inlet and the positive-pressure air outlet are opened on one side of the positive-pressure cylinder, and the air inlet and the air outlet can be symmetrically arranged, making the overall design simpler and ensuring that the overall structure will be more compact, thereby making the overall mass and volume smaller. Similarly, the negative-pressure air inlet and the negative-pressure air outlet are opened on one side of the negative-pressure cylinder, and the air inlet and the air outlet can also be symmetrically arranged, making the overall design simpler and ensuring that the overall structure will be more compact.

[0029] It is worth mentioning that in any of the above embodiments, the air intake assembly includes an air intake seat 410 and a transfer tube 420, the positive and negative pressure pumps are connected to one end of the transfer tube 420 through the air intake seat 410, and the other end of the transfer tube 420 is connected to the molecular sieve tube 500. The valve assembly includes a one-way valve 710, a rhythm valve 720, a pulse valve 730 and a rhythm valve seat 740, the molecular sieve tube 500 is connected to the one-way valve 710 through the washing screen assembly 600, and the one-way valve 710 is connected to the pulse valve 730, the rhythm valve 720 is arranged on the rhythm valve seat 740, and the rhythm valve 720 is used to connect to the molecular sieve tube 500. The sensor 800 is an oxygen concentration sensor 800. Specifically, the number of the one-way valves 710 is two, the number of the pulse valves 730 is one, the number of the rhythm valves 720 is two, and both rhythm valves 720 are arranged on the rhythm valve seat 740. It is worth mentioning that the number of different valves will be adaptively adjusted according to specific needs so that the entire oxygen concentrator can operate normally. In this embodiment, the number is not excessively described or limited. Furthermore, the tank assembly includes a gas storage tank 910 and a nitrogen exhaust buffer tank 920, the gas storage tank 910 is connected to the pulse valve 730, the sensor 800 is used to detect the gas storage tank 910, and the gas storage tank 910 is connected to the oxygen outlet nozzle, and the nitrogen exhaust buffer tank 920 is connected to the negative pressure cylinder.

[0030] Air enters the air compressor 300 from the outside, and is compressed to form high-pressure air. That is, the external air directly enters the inside of the positive pressure pump through the positive pressure air inlet of the positive pressure pump of the air compressor 300, and then is compressed to form high-pressure air. The high-pressure air passes through the air intake assembly and enters the molecular sieve tube 500 for separation of oxygen and nitrogen. That is to say, the high-pressure air directly enters the molecular sieve tube 500 through the transmission of the air intake seat 410 and the transfer tube 420, and then the nitrogen and oxygen are separated by the molecular sieve tube 500. Since the adsorbent has a strong adsorption capacity for nitrogen under high pressure, the adsorption of nitrogen is achieved by the adsorbent on the molecular sieve. When the adsorption is close to saturation, the adsorption of nitrogen by the adsorbent will be reduced by reducing the pressure, so that the adsorbed nitrogen can be analyzed out. In other words, due to the porous structure of the molecular sieve in the molecular sieve tube 500, it is easier to react with nitrogen than other materials. When the molecular sieve contacts with high-pressure air, nitrogen molecules will be adsorbed on the surface of the molecular sieve, while oxygen will pass directly through the molecular sieve and be retained. Therefore, oxygen and nitrogen can be separated very well. It is worth mentioning that the high-pressure air can be transmitted to the inside of the molecular sieve tube 500 through the air inlet seat 410, and a low-pressure environment can be created to alternately complete the desorption process of the double-tower molecular sieve tube 5004, extract the nitrogen adsorbed in the adsorbent, and restore its strong adsorption capacity for nitrogen. The oxygen enters the tank assembly after passing through the washing screen assembly 600, the valve assembly and the sensor 800 in turn, and is then supplied through the oxygen outlet nozzle. The nitrogen enters the air compressor 300, is discharged to the tank assembly, and is finally discharged into the atmosphere. That is to say, the separated oxygen is high-concentration oxygen. After passing through the washing and screening component 600, it passes through the one-way valve 710 and the oxygen concentration sensor 800, and finally enters the gas storage tank 910. Then, according to the needs, continuous high-concentration oxygen can be provided to the user from the oxygen outlet nozzle. That is to say, the gas storage tank 910 is connected to the oxygen outlet nozzle. When there is a need, just open the oxygen outlet nozzle. Specifically, the washing and screening component 600 and the rhythm valve 720 are mainly used to control the double tubes of the molecular sieve to alternately separate nitrogen and oxygen; the one-way valve 710 is mainly used to converge the oxygen obtained by the alternating separation of the double tubes of the molecular sieve, and at the same time, it is necessary to avoid the backflow of oxygen. Further, the nitrogen adsorbed on the molecular sieve in the molecular sieve tube 500 is sucked out through the negative pressure air inlet of the negative pressure pump, and then enters the inside of the negative pressure pump, enters the nitrogen discharge buffer tank 920 through the negative pressure exhaust port, and is finally discharged into the atmosphere. It is worth mentioning that by using the oxygen concentration sensor 800, the output oxygen concentration can be detected, and by using the gas storage tank 910, the separated oxygen can be temporarily stored to play a role in stabilizing the flow.

[0031] Therefore, through this method of use, using positive and negative pressure pumps as power sources and adopting the VPSA oxygen production principle, the difficulty of oxygen concentrator production can be reduced and production costs can be reduced. At the same time, the positive and negative pressure pumps have a simpler structure, a small size, and a light weight, which will reduce the volume and weight of the entire machine. In addition, the oxygen concentrator using the positive and negative pressure pumps has a lower operating power, which will make the battery life of the entire machine longer, making it more convenient for users to use and achieving the purpose of portability.

[0032] In summary, the above-mentioned implementation modes are not limitative implementation modes of the present invention, and any modification or equivalent deformation made by technicians in this field on the basis of the essential content of the present invention is within the technical scope of the present invention.

Claims

1. A VPSA portable oxygen concentrator, characterized in that: include: Shell, base, air compressor, air intake assembly, molecular sieve tube, sieve washing assembly, valve assembly, sensor, tank assembly and oxygen outlet nozzle; The air compressor and the molecular sieve tube are both arranged on the base, the air compressor is connected to the molecular sieve tube through the air intake assembly, the molecular sieve tube is connected to the sieve washing assembly, and the sieve washing assembly is connected to the tank assembly through the valve assembly, the sensor is arranged on the tank assembly, and the oxygen outlet nozzle is connected to the tank assembly; The shell is connected to the base, and the shell covers the outside of the air compressor, the air intake assembly, the molecular sieve tube, the screen washing assembly, the valve assembly, the sensor and the tank assembly.

2. The VPSA portable oxygen concentrator according to claim 1, characterized in that: The air compressor comprises a pump cover and positive and negative pressure pumps, wherein the positive and negative pressure pumps are arranged on the base, and the pump cover covers the outer sides of the positive and negative pressure pumps.

3. The VPSA portable oxygen concentrator according to claim 2, characterized in that: The positive and negative pressure pumps include a motor, a positive pressure cylinder and a negative pressure cylinder, a positive pressure cylinder end cover is provided at one end of the positive pressure cylinder, a positive pressure air inlet is provided at the other end, a positive pressure exhaust port is provided on the positive pressure cylinder end cover, the positive pressure air inlet is located on one side of the positive pressure cylinder, and the positive pressure exhaust port is located on the other side of the positive pressure cylinder, a negative pressure cylinder end cover is provided at one end of the negative pressure cylinder, a negative pressure air inlet is provided on one side of the negative pressure cylinder, and the negative pressure exhaust port is located on the other side of the negative pressure cylinder, the positive pressure air inlet and the positive pressure exhaust port are both connected to the interior of the positive pressure cylinder, and the negative pressure air inlet and the negative pressure exhaust port are both connected to the interior of the negative pressure cylinder.

4. The VPSA portable oxygen concentrator according to claim 2, characterized in that: The positive and negative pressure pumps include a motor, a positive pressure cylinder and a negative pressure cylinder. The positive pressure cylinder is provided with a positive pressure cylinder end cover, and the positive pressure cylinder end cover is provided with a positive pressure air inlet and a positive pressure exhaust port, and the positive pressure air inlet and the positive pressure exhaust port are both connected to the interior of the positive pressure cylinder. The negative pressure cylinder is provided with a negative pressure cylinder end cover, and the negative pressure cylinder end cover is provided with a negative pressure air inlet and a negative pressure exhaust port, and the negative pressure air inlet and the negative pressure exhaust port are both connected to the interior of the negative pressure cylinder.

5. The VPSA portable oxygen concentrator according to claim 2, characterized in that: The positive and negative pressure pumps include a motor, a positive pressure cylinder and a negative pressure cylinder. A positive pressure cylinder end cover is provided on one end of the positive pressure cylinder, and a positive pressure air inlet and a positive pressure exhaust port are opened at the other end. The positive pressure air inlet and the positive pressure exhaust port are both connected to the interior of the positive pressure cylinder. A negative pressure cylinder end cover is provided on one end of the negative pressure cylinder, and a negative pressure air inlet and a negative pressure exhaust port are opened at the other end. The negative pressure air inlet and the negative pressure exhaust port are both connected to the interior of the negative pressure cylinder.

6. The VPSA portable oxygen concentrator according to claim 3, 4 or 5, characterized in that: The air intake assembly comprises an air intake seat and a transfer tube. The positive and negative pressure pumps are connected to one end of the transfer tube through the air intake seat, and the other end of the transfer tube is connected to the molecular sieve tube.

7. The VPSA portable oxygen concentrator according to claim 6, characterized in that: The valve assembly includes a one-way valve, a rhythm valve, a pulse valve and a rhythm valve seat. The molecular sieve tube is connected to the one-way valve through the screen washing assembly, and the one-way valve is connected to the pulse valve. The rhythm valve is arranged on the rhythm valve seat, and the rhythm valve is used to connect to the molecular sieve tube.

8. The VPSA portable oxygen concentrator according to claim 7, characterized in that: The tank assembly comprises a gas storage tank and a nitrogen exhaust buffer tank, the gas storage tank is connected to the pulse valve, the sensor is used to detect the gas storage tank, and the gas storage tank is connected to the oxygen outlet nozzle, and the nitrogen exhaust buffer tank is connected to the negative pressure cylinder.

9. The VPSA portable oxygen concentrator according to claim 8, characterized in that: The sensor is an oxygen concentration sensor.

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