Preparation method of air negative oxygen ions with adjustable temperature and humidity and pressure swing adsorption oxygen generator

Abstract

The invention discloses a temperature and humidity adjustable air negative oxygen ion preparation method and a pressure swing adsorption oxygen generator, and relates to the technical field of medical care, the preparation method comprises the following steps: preparing compressed air, and respectively introducing the compressed air into a vortex tube and a temperature and humidity regulator; the compressed air introduced into the vortex tube forms hot air flow and cold air flow respectively, the hot air flow enters a heating heat exchanger in the temperature and humidity regulator, and the cold air flow enters a refrigeration heat exchanger in the temperature and humidity regulator; the compressed air introduced into the temperature and humidity regulator sequentially passes through a refrigeration heat exchanger and a heating heat exchanger, so that the compressed air is subjected to temperature reduction, dehumidification and temperature rise regulation, and dry compressed air is obtained; performing pressure swing adsorption on the dry compressed air to obtain compressed enriched oxygen; and the compressed enriched oxygen is introduced into the jet pipe, so that the compressed enriched oxygen is mixed with the water body, and the gas containing the negative oxygen ions is obtained. According to the invention, compressed air is respectively introduced into the vortex tubes to form cold and hot air flows, and the cold and hot air flows are used for dehumidifying and regulating the temperature of the compressed air, so that the molecular sieve is protected.

Description

Technical Field

[0001] This invention relates to the field of medical and health care technology, and in particular to a method for preparing air negative oxygen ions with adjustable temperature and humidity and a pressure swing adsorption oxygen generator. Background Technology

[0002] The growing demand for high-purity oxygen in the healthcare sector has driven the continuous evolution of oxygen generation technologies. Among these, pressure swing adsorption (PSA) oxygen generation technology, proposed by Skarstrom in the 1960s, has been widely used in oxygen therapy and health care due to its advantages such as low operating temperature and no need for heating regeneration. This technology utilizes the selective adsorption of nitrogen by zeolite molecular sieves to achieve continuous separation of high-concentration oxygen from the air through a cycle of pressure adsorption and depressurization desorption.

[0003] Currently, mainstream PSA oxygen concentrators are compressor-driven, using alternating adsorption / desorption through dual or multi-molecular sieve towers to achieve continuous oxygen supply. Large-scale equipment is typically equipped with a dry chiller to pre-cool and dehumidify the intake air, while small home models generally do not have a dry chiller and directly use ambient air as the feed gas.

[0004] However, small oxygen generators lack a dry cooling device, and humid air can easily cause the molecular sieves to hydrolyze and fail. Although large equipment is equipped with a dry cooling device, due to considerations of energy consumption, size, and air comfort, the cooling temperature is relatively high, and the degree of dehumidification of the air is insufficient. It is still difficult to avoid the reaction between the moisture in the air and the molecular sieves, resulting in the weakening of the molecular sieve structure.

[0005] Therefore, there is an urgent need for a new oxygen production method to solve the problem that the current pressure swing adsorption oxygen production process does not dehumidify the intake air or the dehumidification effect is poor, which leads to the easy failure of molecular sieves. Summary of the Invention

[0006] The main objective of this invention is to propose a method for preparing air negative oxygen ions with adjustable temperature and humidity, and a pressure swing adsorption oxygen generator, which aims to solve the problem that the current pressure swing adsorption oxygen generation process does not dehumidify the intake air or the dehumidification effect is poor, which leads to the easy failure of molecular sieves.

[0007] To achieve the above objectives, the present invention proposes a method for preparing air negative oxygen ions with adjustable temperature and humidity, comprising: Compressed air is prepared and then introduced into a vortex tube and a temperature and humidity regulator, respectively. The compressed air introduced into the vortex tube forms a hot airflow and a cold airflow respectively. The hot airflow is introduced into the heating heat exchanger in the temperature and humidity regulator, and the cold airflow is introduced into the refrigeration heat exchanger in the temperature and humidity regulator. The compressed air introduced into the temperature and humidity regulator passes through the refrigeration heat exchanger and the heating heat exchanger in sequence, so that the compressed air is cooled, dehumidified and heated to obtain dry compressed air. Pressure swing adsorption is applied to dry compressed air to obtain compressed oxygen-enriched air; Compressed oxygen is introduced into the jet pipe to mix with the water, resulting in a gas containing negative oxygen ions.

[0008] In one embodiment, the jet tube has a mixing chamber, a constriction section, an oxygen inlet, a water inlet, and a first outlet, the water inlet being connected to a water container; The steps of introducing compressed oxygen-enriched water into a jet pipe to mix the compressed oxygen with the water and obtain gas containing negative oxygen ions include: Compressed oxygen-enriched water is sequentially passed through the oxygen inlet, mixing chamber, contraction section, and first outlet to create negative pressure in the mixing chamber and draw water from the water container into the mixing chamber. The compressed oxygen-rich gas collides with the water and forms a gas containing negative oxygen ions, which is then ejected from the first outlet.

[0009] In one embodiment, the step of performing pressure swing adsorption on dry compressed air to obtain compressed oxygen-enriched air includes: Adjust the switching valve and open the air inlet valve of the first molecular sieve tower to allow dry compressed air to enter the first molecular sieve tower, thereby pressurizing and adsorbing the dry compressed air by the molecular sieve particles in the first molecular sieve tower to obtain compressed oxygen enrichment. If the molecular sieve particles in the first molecular sieve tower are in a nitrogen-saturated state, adjust the switching valve and open the air inlet valve of the second molecular sieve tower to introduce dry compressed air into the second molecular sieve tower; and open the exhaust valve of the first molecular sieve tower to depressurize and desorb the molecular sieve particles in the first molecular sieve tower. If the molecular sieve particles in the second molecular sieve tower are in a nitrogen-saturated state, adjust the switching valve and open the inlet valve of the first molecular sieve tower and the exhaust valve of the second molecular sieve tower.

[0010] In one embodiment, before the step of introducing compressed oxygen-enriched gas into the jet pipe, the method further includes: Compressed oxygen is first introduced into the oxygen storage tank, and then released from the oxygen storage tank and sequentially introduced into the monitoring instrument, pressure control valve and jet pipe. Based on the monitoring parameters of the monitoring instrument, the pressure control valve is adjusted to regulate the air pressure entering the jet pipe.

[0011] In one embodiment, the steps of preparing compressed air and passing the compressed air into the vortex tube and the temperature and humidity regulator respectively include: Start the air compressor to compress outside air into compressed air; Compressed air is first introduced into the air storage tank, and then released from the air storage tank and introduced into the vortex tube and the temperature and humidity regulator respectively. Adjust the valve at the outlet of the air reservoir to regulate the pressure and flow rate of the compressed air entering the vortex tube and the temperature and humidity regulator.

[0012] This invention also proposes a pressure swing adsorption (PSA) oxygen generator, comprising an air compressor, a vortex tube, a temperature and humidity regulator, a molecular sieve assembly, and a negative ion assembly. The temperature and humidity regulator includes a first housing, a refrigeration heat exchanger, and a heating heat exchanger, both located within the first housing. The air compressor's outlet is connected to the air inlet of the first housing and the inlet of the vortex tube, respectively. The vortex tube's cold air outlet is connected to the air inlet of the refrigeration heat exchanger, and its hot air outlet is connected to the air inlet of the heating heat exchanger. Both the refrigeration and heating heat exchanger's exhaust ports extend out of the first housing, with the refrigeration heat exchanger being closer to the air inlet of the first housing than the heating heat exchanger. The molecular sieve assembly's inlet is connected to the air outlet of the first housing. The negative ion assembly includes a jet tube, with the jet tube's oxygen inlet connected to the molecular sieve assembly's outlet, and the jet tube's water inlet connected to a water body.

[0013] In one embodiment, the molecular sieve assembly includes two molecular sieve towers, each equipped with an inlet valve and an outlet valve. The top of the molecular sieve tower is provided with an inlet, and the bottom of the molecular sieve tower is provided with an outlet. The outlet of the first shell is connected to the inlets of the two molecular sieve towers respectively through the two inlet valves. The bottom of the molecular sieve tower is connected to the oxygen inlet of the jet pipe through the outlet valve.

[0014] In one embodiment, the molecular sieve tower is further provided with a switching valve, an exhaust valve, and a pressure equalization valve. The outlet of the first shell is connected to the inlet of the switching valve through a first pipeline. One side outlet of the switching valve is connected to the inlet valve of the first molecular sieve tower through a second pipeline. The other side outlet of the switching valve is connected to the inlet valve of the second molecular sieve tower through a third pipeline. Each of the second and third pipelines is provided with an exhaust valve. The second and third pipelines are connected through a fourth pipeline, and a pressure equalization valve is provided on the fourth pipeline.

[0015] In one embodiment, the negative ion assembly further includes a water container, and the jet tube has a mixing chamber, a constriction section, an oxygen inlet, a water inlet, and a first outlet. The oxygen inlet and the water inlet are both connected to the mixing chamber. The mixing chamber is connected to the first outlet through the constriction section. The inner diameter of the constriction section is smaller than the inner diameter of the mixing chamber and the diameter of the first outlet. The water inlet is detachably connected to the water container.

[0016] In one embodiment, the temperature and humidity adjustable pressure swing adsorption oxygen generator further includes a pressure control valve and a monitoring instrument. The outlet of the molecular sieve assembly is connected to the oxygen inlet through the pressure control valve, and the monitoring instrument is located between the pressure control valve and the outlet of the molecular sieve assembly.

[0017] The technical solution of this invention first prepares compressed air and distributes it to a vortex tube and a temperature and humidity regulator, achieving a rational distribution of driving power. Then, by using the vortex tube to separate the compressed air into two streams, a cold stream and a hot stream, which are respectively introduced into the cooling heat exchanger and heating heat exchanger within the temperature and humidity regulator, achieving a cooling effect without moving parts. This replaces the traditional high-energy-consuming dry refrigeration unit, significantly reducing system energy consumption and size. Next, by having the compressed air introduced into the temperature and humidity regulator flow sequentially through the cooling and heating heat exchangers, the cold stream first deeply cools and dehumidifies the compressed air, removing moisture that could cause molecular sieve failure. Then, the hot stream precisely heats and regulates the dehumidified air, ultimately obtaining dry compressed air with suitable temperature and humidity. This effectively protects the molecular sieve in the subsequent pressure swing adsorption process and extends its service life. Furthermore, by performing pressure swing adsorption on the dry compressed air, high-purity compressed oxygen is obtained. Finally, by introducing compressed oxygen into the jet pipe to mix it with the water, the jet effect generated by the high-speed oxygen flow automatically absorbs water and causes violent collisions and friction, causing some oxygen molecules to become charged and form negative oxygen ions. This achieves the generation of negative oxygen ions without the need for external energy. Furthermore, the generated negative oxygen ions can bind more effectively with hemoglobin in human blood, enhancing the health care effect.

[0018] Overall, this invention innovatively achieves effective and reliable regulation of inlet air temperature and humidity by using vortex tubes in the preparation process and utilizing the vortex effect in conjunction with the synergistic effect of the refrigeration heat exchanger and the heating heat exchanger. It ensures the dehumidification effect of the inlet air without the need for a traditional dry refrigeration machine, thereby ensuring the service life of the molecular sieve. At the same time, it also reduces energy efficiency and facilitates equipment miniaturization. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic flowchart of the first embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity according to this application; Figure 2 This is a schematic flowchart of the second embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity according to this application; Figure 3 This is a schematic flowchart of the third embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity according to this application; Figure 4This is a flowchart illustrating the fourth embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity according to this application. Figure 5 This is a flowchart illustrating the fifth embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity according to this application. Figure 6 This is a schematic diagram of a structure of an embodiment of the pressure swing adsorption oxygen generator provided by the present invention.

[0021] Explanation of icon numbers: 1. Air compressor; 2. Vortex tube; 3. Temperature and humidity regulator; 31. First housing; 32. Refrigeration heat exchanger; 33. Heating heat exchanger; 4. Molecular sieve assembly; 41. Molecular sieve tower; 411. Second shell; 412. Mesh limiter; 413. Non-woven fabric; 42. Inlet valve; 43. Oxygen outlet valve; 44. Switching valve; 45. Exhaust valve; 46. Pressure equalizing valve; 5. Oxygen storage unit; 6. Air storage unit; 7. Negative ion generator; 71. Jet tube; 72. Water container; 81. Pressure control valve; 82. Monitoring instrument.

[0022] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] The growing demand for high-purity oxygen in the healthcare sector has driven the continuous evolution of oxygen generation technologies. Among these, pressure swing adsorption (PSA) oxygen generation technology, proposed by Skarstrom in the 1960s, has been widely used in oxygen therapy and health care due to its advantages such as low operating temperature and no need for heating regeneration. This technology utilizes the selective adsorption of nitrogen by zeolite molecular sieves to achieve continuous separation of high-concentration oxygen from the air through a cycle of pressure adsorption and depressurization desorption.

[0027] Currently, mainstream PSA oxygen concentrators are compressor-driven, using alternating adsorption / desorption through dual or multi-molecular sieve towers to achieve continuous oxygen supply. Large-scale equipment is typically equipped with a dry chiller to pre-cool and dehumidify the intake air, while small home models generally do not have a dry chiller and directly use ambient air as the feed gas.

[0028] However, small oxygen generators lack a dry cooling device, and humid air can easily cause the molecular sieves to hydrolyze and fail. Although large equipment is equipped with a dry cooling device, due to considerations of energy consumption, size, and air comfort, the cooling temperature is relatively high, and the degree of dehumidification of the air is insufficient. It is still difficult to avoid the reaction between the moisture in the air and the molecular sieves, resulting in the weakening of the molecular sieve structure.

[0029] Furthermore, even if high concentrations of oxygen are prepared, the human body's blood absorption efficiency for high concentrations of oxygen is not high, and only a small amount of oxygen can dissolve in the blood.

[0030] To address the above problems, this invention proposes a method for preparing air negative oxygen ions with adjustable temperature and humidity, referring to... Figure 1 , Figure 1This is a schematic flowchart of the first embodiment of the temperature and humidity adjustable air negative oxygen ion preparation method of the present invention. It should be noted that the executing entity in this embodiment can be an operator who operates the corresponding equipment and instruments to implement the preparation method; the executing entity in this embodiment can also be a computing terminal with communication and computing functions, such as a desktop computer, control motherboard, mobile tablet, etc. Such a computing terminal can store computer programs and operate the various equipment and instruments according to the computer programs to implement the method steps in this embodiment.

[0031] In this embodiment, the method for preparing air negative oxygen ions with adjustable temperature and humidity includes steps S10~S60: Step S10: Prepare compressed air and pass it into the vortex tube and the temperature and humidity regulator respectively; Compressed air can be produced using an air compressor. An air filter can be installed at the air compressor's inlet to effectively filter out solid impurities such as dust from the ambient air, preventing them from entering the compressor and causing wear, while also ensuring the quality of the air entering the system. Additionally, an oil filter can be installed between the air compressor and subsequent components such as the vortex tube and temperature and humidity controller to further remove any liquid contaminants such as oil present in the compressed air, preventing oil from contaminating or damaging precision components such as the vortex tube, heat exchanger, and molecular sieve. Alternatively, the air compressor can be configured as an oil-free compressor, thereby reducing the possibility of lubricating oil entering the air path and ensuring the purity of the gas throughout the oxygen production process.

[0032] In addition, the temperature and humidity regulator is used to regulate the temperature and humidity of the gas entering its inner cavity. It may have a shell, and a refrigeration heat exchanger and a heating heat exchanger are installed and fixed in the cavity inside the shell, so that the compressed air enters the inner cavity of the temperature and humidity regulator and passes through the outside of the refrigeration heat exchanger and the outside of the heating heat exchanger in sequence.

[0033] In step S20, the compressed air introduced into the vortex tube forms a hot airflow and a cold airflow respectively. The hot airflow is introduced into the heating heat exchanger in the temperature and humidity regulator, and the cold airflow is introduced into the refrigeration heat exchanger in the temperature and humidity regulator. It should be noted that when compressed gas is introduced into the vortex tube through the tangential inlet, it generates a vortex effect, forming two separate airflows: a hot airflow and a cold airflow. To produce a significant vortex effect, the typical inlet pressure of the high-pressure gas needs to be between 0.4 and 0.8 MPa. Therefore, the pressure of the prepared compressed gas needs to be above 0.4 MPa to meet the requirements for the vortex effect. Preferably, a compressed gas pressure of 0.8 MPa can be prepared to fully meet the requirements for generating the vortex effect and avoid the situation where the pressure fails to meet the vortex effect requirements due to pressure loss during transmission.

[0034] In addition, heating heat exchangers and cooling heat exchangers can be finned heat exchangers.

[0035] Step S30: The compressed air introduced into the temperature and humidity regulator passes through the refrigeration heat exchanger and the heating heat exchanger in sequence, so that the compressed air is cooled, dehumidified and heated to obtain dry compressed air. In this process, compressed air is cooled as it passes through the outside of the refrigeration heat exchanger, causing moisture in the compressed air to condense, thus achieving dehumidification. The dehumidified compressed air is then heated as it passes through the outside of the heating heat exchanger, resulting in dry compressed air with suitable temperature and humidity. For reference, the temperature of the dry compressed air can be controlled between 4 and 27°C, and the moisture content can be controlled to ≤0.07 g / m³. 3 .

[0036] Step S40: Pressure swing adsorption is performed on dry compressed air to obtain compressed oxygen-enriched air. In step S60, compressed oxygen-enriched gas is introduced into the jet pipe to mix with the water, thereby obtaining gas containing negative oxygen ions.

[0037] In this embodiment, compressed air is first prepared and then diverted to a vortex tube and a temperature and humidity regulator, achieving a reasonable distribution of driving power. Next, the vortex tube separates the compressed air into two streams: a cold stream and a hot stream, which are then introduced into the cooling and heating heat exchangers within the temperature and humidity regulator, respectively. This achieves a cooling effect without moving parts, replacing traditional high-energy-consuming dry chillers and significantly reducing system energy consumption and size. Then, the compressed air entering the temperature and humidity regulator flows sequentially through the cooling and heating heat exchangers. The cold stream first deeply cools and dehumidifies the compressed air, removing moisture that could cause molecular sieve failure. The hot stream then precisely heats and regulates the dehumidified air, ultimately obtaining dry compressed air with suitable temperature and humidity. This effectively protects the molecular sieve in the subsequent pressure swing adsorption process and extends its service life. Furthermore, high-purity compressed oxygen is obtained through pressure swing adsorption of the dry compressed air. Finally, by introducing compressed oxygen into the jet pipe to mix it with the water, the jet effect generated by the high-speed oxygen flow automatically absorbs water and causes violent collisions and friction, causing some oxygen molecules to become charged and form negative oxygen ions. This achieves the generation of negative oxygen ions without the need for external energy. Furthermore, the generated negative oxygen ions can effectively combine with hemoglobin in human blood, significantly improving the transport efficiency of oxygen in the human body, thereby enhancing the medical and health care effects.

[0038] The temperature of the gas containing negative oxygen ions generated in this embodiment is suitable for human inhalation, and the negative oxygen ions can effectively combine with hemoglobin in human blood to improve the transport efficiency of oxygen in the human body. Therefore, this preparation method is suitable for oxygen therapy and oxygen health care for various groups of people, as well as for the medical clinical field, and can also be used in industrial oxygen production and other fields, which will not be elaborated here.

[0039] Based on the above embodiments, in the second embodiment of the air negative oxygen ion preparation method with adjustable temperature and humidity of the present invention, the contents that are the same as or similar to those in the first embodiment of the air negative oxygen ion preparation method with adjustable temperature and humidity can be referred to the above description and will not be repeated hereafter.

[0040] Based on this, the jet tube has a mixing chamber, a contraction section, an oxygen inlet, a water inlet, and a first outlet, with the water inlet connected to a water container; Reference Figure 2 Step S60 includes steps S61 to S62: Step S61: Compressed oxygen is passed sequentially through the oxygen inlet, mixing chamber, contraction section and first outlet to create negative pressure in the mixing chamber and draw water from the water container into the mixing chamber. In step S62, the compressed oxygen-rich gas collides with the water to form a gas containing negative oxygen ions, and the gas containing negative oxygen ions is ejected from the first outlet.

[0041] In this embodiment, a jet pipe with a specific structure is used, including a mixing chamber, a contraction section, an oxygen inlet, a water inlet, and a first outlet. When compressed oxygen enters the mixing chamber from the oxygen inlet and flows through the contraction section, a negative pressure is created within the mixing chamber due to the jet effect, automatically drawing water from a container through the water inlet. Subsequently, the high-speed flowing compressed oxygen in the mixing chamber collides and rubs violently with the inhaled water, causing some oxygen molecules to become charged and form negative oxygen ions. Finally, the gas rich in negative oxygen ions is ejected from the first outlet. This preparation method utilizes fluid dynamics principles to achieve water-air mixing and negative oxygen ion generation without an external power source. This not only simplifies the preparation process and reduces its difficulty, but also lowers energy consumption. Furthermore, by generating negative oxygen ions, it effectively improves the transport efficiency of oxygen within the human body, enhancing healthcare benefits.

[0042] Based on the above embodiments, in the third embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity of the present invention, the contents that are the same as or similar to those in the second embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity can be referred to the above description and will not be repeated hereafter.

[0043] Based on this, refer to Figure 3 Step S40 includes steps S41 to S43: Step S41: Adjust the switching valve and open the air inlet valve of the first molecular sieve tower to allow dry compressed air to enter the first molecular sieve tower, so that the dry compressed air is pressurized and adsorbed by the molecular sieve particles in the first molecular sieve tower to obtain compressed oxygen-enriched air. It should be noted that the molecular sieve particles can specifically be zeolite molecular sieve particles. The molecular sieve tower 41 is filled with zeolite molecular sieve particles. When dry, cold, and compressed air, after temperature and humidity control, passes through the zeolite molecular sieve particles, the particles selectively adsorb nitrogen. This is because nitrogen has a larger quadrupole moment (0.31 Å) than oxygen (0.10 Å), and nitrogen has a higher polarizability. Therefore, nitrogen interacts more strongly with the cations and polar surfaces in the zeolite than with oxygen, resulting in selective adsorption of nitrogen. After adsorption, 90%–95% of the oxygen molecules in the air are in a free state, thus achieving compressed oxygen enrichment.

[0044] Step S42: If the molecular sieve particles in the first molecular sieve tower are in a nitrogen-saturated state, adjust the switching valve and open the air inlet valve of the second molecular sieve tower to introduce dry compressed air into the second molecular sieve tower; and open the exhaust valve of the first molecular sieve tower to depressurize and desorb the molecular sieve particles in the first molecular sieve tower. In this process, after a period of pressure adsorption, the molecular sieve becomes saturated with nitrogen molecules (i.e., in a nitrogen-saturated state), requiring regeneration. Therefore, by adjusting the switching valve and opening the inlet valve of the second molecular sieve tower, dry compressed air is introduced into the second molecular sieve tower. At the same time, the exhaust valve of the first molecular sieve tower is opened to depressurize and desorb the molecular sieve particles in the first molecular sieve tower. This allows the molecular sieve tower in the desorption and regeneration state to promptly discharge the desorbed nitrogen and other impurity gases, effectively restoring the adsorption capacity of the molecular sieve.

[0045] Step S43: If the molecular sieve particles in the second molecular sieve tower are in a nitrogen-saturated state, adjust the switching valve and open the inlet valve of the first molecular sieve tower and the exhaust valve of the second molecular sieve tower.

[0046] In this embodiment, dry compressed air is first introduced into the first molecular sieve tower by adjusting the switching valve and opening the inlet valve to complete pressurized adsorption and obtain compressed oxygen enrichment. When the molecular sieve particles in the first molecular sieve tower reach saturation with adsorbed nitrogen, the airflow is switched to the second molecular sieve tower by adjusting the switching valve, while the exhaust valve of the first molecular sieve tower is opened to allow depressurization and desorption regeneration. When the second molecular sieve tower is saturated, the airflow is switched back to the first molecular sieve tower. This dual-tower alternating pressurized adsorption and depressurized desorption operation enables continuous and stable oxygen production. Simultaneously, timely depressurization and desorption effectively restores the adsorption capacity of the molecular sieve, improving oxygen production efficiency and the service life of the molecular sieve.

[0047] Based on the above embodiments, in the fourth embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity of the present invention, the contents that are the same as or similar to those in the third embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity can be referred to the above description and will not be repeated hereafter.

[0048] Based on this, refer to Figure 4 Before step S60, the method for preparing air negative oxygen ions with adjustable temperature and humidity also includes steps S51-S52: Step S51: First, compressed oxygen is introduced into the oxygen storage tank, and then released from the oxygen storage tank and sequentially introduced into the monitoring instrument, pressure control valve and jet pipe. The monitoring instruments may include pressure gauges, oxygen concentration meters, flow meters, etc. In this way, operators or control systems can monitor key parameters such as the pressure, concentration and flow rate of the output oxygen in real time, so as to make relevant adjustments to the pressure control valve and ensure the stability and safety of the final output negative oxygen ion gas.

[0049] Step S52: Based on the monitoring parameters of the monitoring instrument, adjust the pressure control valve to regulate the air pressure entering the jet pipe.

[0050] In this embodiment, by storing compressed oxygen in an oxygen storage tank before introducing it into the jet pipe, the oxygen output pressure is stabilized. Furthermore, by using monitoring instruments to monitor oxygen parameters in real time and adjusting the pressure control valve based on the monitoring data, the oxygen pressure entering the jet pipe can be precisely controlled. This embodiment ensures, on the one hand, the formation of a stable and reliable high-speed airflow within the jet pipe, guaranteeing the continuity and controllable concentration of negative oxygen ions; on the other hand, by monitoring and adjusting key parameters, it improves the stability and safety of the system operation.

[0051] Based on the above embodiments, in the fifth embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity of the present invention, the contents that are the same as or similar to those in the first embodiment of the method for preparing air negative oxygen ions with adjustable temperature and humidity can be referred to the above description and will not be repeated hereafter.

[0052] Based on this, refer to Figure 5 Step S10 includes steps S11 to S13: Step S11: Start the air compressor to compress outside air into compressed air; Step S12: First, compressed air is introduced into the air storage tank, and then released from the air storage tank and introduced into the vortex tube and the temperature and humidity regulator respectively. Step S13: Adjust the valve body at the air outlet of the air reservoir to regulate the pressure and flow rate of the compressed air entering the vortex tube and the temperature and humidity regulator.

[0053] In this embodiment, an air storage device is used to temporarily store the compressed air generated by the air compressor, thereby balancing and stabilizing the pressure and flow rate of the compressed air. By adjusting the valve at the outlet of the air storage device, the pressure and flow rate of the compressed air supplied to the vortex tube and the temperature and humidity regulator can be precisely controlled. This embodiment effectively eliminates the pulsating characteristics of the airflow output from the air compressor, providing a stable air source for the subsequent vortex tube refrigeration and temperature and humidity regulation processes. This not only improves the operational stability of each module in the system but also further reduces system energy consumption and enhances overall energy efficiency through optimized airflow distribution.

[0054] Please see Figure 6 The present invention also proposes a pressure swing adsorption oxygen generator, which includes an air compressor 1, a vortex tube 2, a temperature and humidity regulator 3, a molecular sieve assembly 4, and a negative ion assembly 7. The temperature and humidity regulator 3 includes a first housing 31, a refrigeration heat exchanger 32, and a heating heat exchanger 33. The refrigeration heat exchanger 32 and the heating heat exchanger 33 are both located inside the first housing 31. The air outlet of the air compressor 1 is connected to the air inlet of the first housing 31 and the inlet of the vortex tube 2, respectively. The cold air outlet of the vortex tube 2 is connected to the air inlet of the refrigeration heat exchanger 32. The hot air port of the vortex tube 2 is connected to the air inlet of the heating heat exchanger 33. The exhaust ports of both the cooling heat exchanger 32 and the heating heat exchanger 33 extend out of the first housing 31. The cooling heat exchanger 32 is closer to the air inlet of the first housing 31 than the heating heat exchanger 33. The air inlet of the molecular sieve assembly 4 is connected to the air outlet of the first housing 31. The negative ion assembly 7 includes a jet tube 71. The oxygen inlet of the jet tube 71 is connected to the air outlet of the molecular sieve assembly 4. The water inlet of the jet tube 71 is used to connect to the water body.

[0055] In this embodiment, a compact and fully functional pressure swing adsorption (PSA) oxygen generator is constructed by integrating the air compressor 1, vortex tube 2, temperature and humidity regulator 3, molecular sieve assembly 4, and negative ion assembly 7 into a single unit. Specifically, by connecting the outlet of the air compressor 1 to the inlet of the first housing 31 and the inlet of the vortex tube 2, a reasonable split of compressed air is achieved. One path enters the subsequent temperature and humidity regulation process, while the other drives the vortex tube 2, providing a stable air source for subsequent processing. Furthermore, by connecting the cold air outlet of the vortex tube 2 to the inlet of the refrigeration heat exchanger 32 and the hot air outlet to the inlet of the heating heat exchanger 33, the efficient separation of hot and cold airflows is achieved by utilizing the absence of moving parts in the vortex tube 2. This replaces the traditional high-energy-consuming dry refrigeration unit, significantly reducing system energy consumption and size. By placing the refrigeration heat exchanger 32 closer to the air inlet of the first housing 31 than the heating heat exchanger 33, the compressed air is ensured to undergo deep cooling and dehumidification in the refrigeration heat exchanger 32 first, effectively removing moisture to protect the subsequent molecular sieve and prevent the molecular sieve particles from pulverizing or failing. Then, the compressed air undergoes precise temperature regulation in the heating heat exchanger 33 to obtain dry compressed air with suitable temperature and humidity. Next, by connecting the air inlet of the molecular sieve assembly 4 to the air outlet of the first housing 31, the treated dry compressed air enters the molecular sieve assembly 4 for efficient oxygen-nitrogen separation, obtaining high-purity oxygen. Finally, by connecting the oxygen inlet of the jet pipe 71 to the air outlet of the molecular sieve assembly 4, a high-speed airflow is formed when the compressed oxygen-enriched air flows through the jet pipe 71. Based on the jet effect, the high-speed airflow creates negative pressure in the mixing chamber within the jet pipe 71, automatically drawing water through the suction port to achieve the mixing of oxygen-enriched air and water. Subsequently, water molecules collide and rub violently with the high-speed oxygen flow inside the jet tube 71. This process causes some oxygen molecules to become charged and form negative oxygen ions, realizing the generation of negative oxygen ions without additional energy. This simplifies the system structure, reduces energy consumption, and significantly enhances the medical and health care value of the equipment.

[0056] Overall, the integrated solution in this embodiment can effectively solve the technical problems of high energy consumption, large size, insufficient dehumidification, and low oxygen utilization rate of traditional oxygen generators.

[0057] The components (such as air compressor 1 and vortex tube 2, vortex tube 2 and refrigeration heat exchanger 32, heating heat exchanger 33, etc.) can be connected through various pipelines, and valves can be installed in the pipelines to control the connection status.

[0058] It should also be noted that the vortex tube 2 is located outside the temperature and humidity regulator 3 (i.e. outside the first housing 31). The first housing 31 may be provided with two connection ports. The first connection port is used to connect the cold outlet of the vortex tube 2 to the refrigeration heat exchanger 32, and the second connection port is used to connect the hot outlet of the vortex tube 2 to the heating heat exchanger 33. In addition, the first housing 31 may also be provided with an exhaust port so that the exhaust ports of the refrigeration heat exchanger 32 and the heating heat exchanger 33 can extend out of the first housing 31.

[0059] Please refer to Figure 6 As an optional implementation, the pressure swing adsorption oxygen generator also includes an air storage unit 6 and an oxygen storage unit 5. The air compressor 1 is connected to the vortex tube 2 and the temperature and humidity regulator 3 through the air storage unit 6. The air inlet of the oxygen storage unit 5 is connected to the air outlet of the molecular sieve assembly 4.

[0060] In this embodiment, by setting up an air storage tank 6 and connecting it to the air compressor 1, the vortex tube 2, and the temperature and humidity regulator 3, the high-pressure gas generated by the air compressor 1 can first enter the air storage tank 6 for storage and pressure balancing. This effectively alleviates the inherent pulsating characteristics of the airflow output from the air compressor 1, providing a more stable and continuous compressed air source for the subsequent vortex tube 2 and temperature and humidity regulator 3, thereby improving the stability of system operation. Furthermore, when high-pressure gas is needed later, it can be released from the air storage tank 6 without frequently starting and stopping the air compressor 1 to obtain high-pressure gas, thus reducing energy consumption and extending equipment lifespan. In addition, by setting up an oxygen storage tank 5 and connecting its inlet to the outlet of the molecular sieve assembly 4, the high-pressure oxygen-rich gas generated by the molecular sieve tower 41 can be collected and stored in a timely manner. When oxygen is needed later, the high-pressure oxygen inside can be automatically released by adjusting the valve on the oxygen storage tank 5, without the need for an additional power source to extract the internal oxygen.

[0061] Please see Figure 6 In an embodiment of the present invention, the molecular sieve assembly 4 includes two molecular sieve towers 41. Each molecular sieve tower 41 is provided with an inlet valve 42 and an outlet valve 43. The top of the molecular sieve tower 41 is provided with an inlet, and the bottom of the molecular sieve tower 41 is provided with an outlet. The outlet of the first housing 31 is connected to the inlet of the two molecular sieve towers 41 respectively through the two inlet valves 42. The bottom of the molecular sieve tower 41 is connected to the oxygen inlet of the jet pipe 71 through the outlet valve 43.

[0062] In this embodiment, by adopting a parallel structure design of dual molecular sieve towers 41, and ensuring that each molecular sieve tower 41 is equipped with an independent inlet valve 42 and an oxygen outlet valve 43, the two molecular sieve towers 41 can alternately perform adsorption and desorption regeneration operations, thereby achieving a continuous and uninterrupted oxygen supply and effectively improving the oxygen supply efficiency and stability of the equipment. By placing the air inlet of the molecular sieve tower 41 at the top and the air outlet at the bottom, a flow direction of upper inlet and lower outlet is formed, allowing compressed air to flow from top to bottom within the tower. This flow direction utilizes the natural weight of the airflow to compact the molecular sieve bed. Combined with the mesh limiter 412 and the non-woven fabric 413 sealing structure installed inside the tower, the physical wear and pulverization of molecular sieve particles caused by long-term vibration and airflow impact are significantly reduced, effectively extending the service life of the molecular sieve. By connecting the air outlet of the first housing 31 to the top air inlets of the two molecular sieve towers 41 via two air inlet valves 42, it is ensured that the dry and cold air with precise temperature and humidity control can be evenly distributed to each tower to participate in the adsorption process. At the same time, by connecting the bottom of the molecular sieve tower 41 to the jet pipe 71 via the oxygen outlet valve 43, the high concentration of oxygen generated after adsorption can be transported to the negative ion generation stage, ensuring the continuity and efficiency of the system process.

[0063] Please refer to Figure 6 As an optional implementation, the molecular sieve tower 41 includes a second shell 411, a mesh limiter 412, molecular sieve particles (not shown in the figure), and at least two layers of nonwoven fabric 413. The mesh limiter 412 and the molecular sieve particles are both disposed inside the second shell 411, and the molecular sieve particles are correspondingly disposed on the mesh limiter 412. The air outlet of the first shell 31 is connected to the air inlets of the two second shells 411 through two air inlet valves 42 respectively. The at least two layers of nonwoven fabric 413 respectively seal the upper and lower ends of the second shell 411, and the mesh limiter 412 and the molecular sieve particles are both located between the at least two layers of nonwoven fabric 413.

[0064] In this embodiment, by employing a structure in which a mesh retainer 412 is placed inside the second shell 411 and filled with molecular sieve particles, the molecular sieve particles are effectively supported and restrained when airflow passes through, significantly reducing particle friction and displacement caused by airflow impact and mechanical vibration, thereby mitigating the physical wear of the molecular sieve. Furthermore, by using at least two layers of nonwoven fabric 413 to seal the upper and lower ends of the second shell 411 respectively, and by encapsulating the mesh retainer 412 and molecular sieve particles between the layers of nonwoven fabric 413, the nonwoven fabric 413 allows airflow to pass through while effectively preventing the escape of trace amounts of powdered particles generated by long-term operation of the molecular sieve with the airflow. This prevents the powder from affecting the downstream oxygen purity and subsequent negative oxygen ion preparation process, while maintaining the stability of the molecular sieve bed. Simultaneously, by connecting the air outlet of the first shell 31 to the air inlet of the second shell 411 through the air inlet valve 42, it is ensured that dry, cool air conditioned by temperature and humidity can smoothly enter the molecular sieve tower 41 to participate in adsorption and separation.

[0065] Please see Figure 6 In an embodiment of the present invention, the molecular sieve tower 41 is further provided with a switching valve 44, an exhaust valve 45, and a pressure equalization valve 46. The outlet of the first housing 31 is connected to the inlet of the switching valve 44 through a first pipeline. One side outlet of the switching valve 44 is connected to the inlet valve 42 of the first molecular sieve tower 41 through a second pipeline. The other side outlet of the switching valve 44 is connected to the inlet valve 42 of the second molecular sieve tower 41 through a third pipeline. An exhaust valve 45 is provided on each of the second and third pipelines. The second and third pipelines are connected through a fourth pipeline, and a pressure equalization valve 46 is provided on the fourth pipeline.

[0066] In this embodiment, by setting a switching valve 44 and connecting its inlet to the outlet of the first housing 31 via a first pipeline, and connecting its two outlets to the inlet valves 42 of the two molecular sieve towers 41 via second and third pipelines respectively, the system can automatically switch between the adsorption and regeneration states of the two molecular sieve towers 41 through the control of the switching valve 44, thereby ensuring a continuous and stable output of oxygen. By setting exhaust valves 45 on the second and third pipelines respectively, the molecular sieve towers 41 in the desorption and regeneration state can promptly discharge desorbed nitrogen and other impurity gases by opening the corresponding exhaust valves 45, effectively restoring the adsorption capacity of the molecular sieves. By setting a fourth pipeline connecting the second and third pipelines and installing a pressure equalization valve 46 on it, the pressure between the two molecular sieve towers 41 can be balanced by opening the pressure equalization valve 46 during the switching process. This pressure equalization process significantly reduces the airflow impact and system energy consumption during switching, while also improving the service life of the molecular sieves.

[0067] Please see Figure 6In an embodiment of the present invention, the negative ion component 7 further includes a water container 72, and the jet tube 71 has a mixing chamber, a constriction section, an oxygen inlet, a water inlet, and a first outlet. The oxygen inlet and the water inlet are both connected to the mixing chamber. The mixing chamber is connected to the first outlet through the constriction section. The inner diameter of the constriction section is smaller than the inner diameter of the mixing chamber and the diameter of the first outlet. The water inlet is detachably connected to the water container 72.

[0068] In this embodiment, by providing a jet pipe 71 with a mixing chamber, a contraction section, an oxygen inlet, a water inlet, and a first outlet, high-pressure oxygen flows through the contraction section, forming a high-speed airflow. Based on the jet effect, a negative pressure is generated in the mixing chamber, thereby automatically drawing water from the water container 72 through the water inlet, achieving water-air mixing without an external power source. Furthermore, by setting the inner diameter of the contraction section to be smaller than the diameter of the mixing chamber and the outlet, the airflow velocity is effectively increased, enhancing the water-air collision intensity and making it easier for oxygen molecules to become charged and form negative oxygen ions. In addition, by designing the water inlet and the water container 72 to be detachably connected, users can easily add water and perform cleaning and maintenance.

[0069] Please see Figure 6 In an embodiment of the present invention, the temperature and humidity adjustable pressure swing adsorption oxygen generator further includes a pressure control valve 81 and a monitoring instrument 82. The outlet of the molecular sieve assembly 4 is connected to the oxygen inlet through the pressure control valve 81, and the monitoring instrument 82 is located between the pressure control valve 81 and the outlet of the molecular sieve assembly 4.

[0070] In this embodiment, a pressure control valve 81 is installed between the outlet of the molecular sieve assembly 4 and the oxygen inlet of the jet tube 71, allowing for precise control of the oxygen output pressure. This ensures a stable, high-speed oxygen flow within the jet tube 71, guaranteeing the continuous and stable generation of negative oxygen ions and allowing the negative ion concentration to be controlled by adjusting the pressure as needed. Furthermore, a monitoring instrument 82 is installed between the pressure control valve 81 and the molecular sieve assembly 4, enabling operators or the control system to monitor key parameters of the output oxygen in real time. This provides users with an intuitive display of the operating status, and when abnormal monitoring data occurs, the pressure control valve 81 can be adjusted promptly to ensure the system remains in optimal working condition. Ultimately, this ensures the stability of the negative oxygen ion generation effect and the safety of the equipment.

[0071] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for preparing air negative oxygen ions with adjustable temperature and humidity, characterized in that, include: Compressed air is prepared and then introduced into a vortex tube and a temperature and humidity regulator, respectively. The compressed air introduced into the vortex tube forms a hot airflow and a cold airflow respectively. The hot airflow is introduced into the heating heat exchanger in the temperature and humidity regulator, and the cold airflow is introduced into the refrigeration heat exchanger in the temperature and humidity regulator. The compressed air introduced into the temperature and humidity regulator is passed sequentially through the refrigeration heat exchanger and the heating heat exchanger to cool and dehumidify the compressed air and regulate its temperature, thereby obtaining dry compressed air. The dry compressed air is subjected to pressure swing adsorption to obtain compressed oxygen-enriched air; The compressed oxygen-enriched gas is introduced into the jet pipe to mix with the water, thereby obtaining a gas containing negative oxygen ions.

2. The method for preparing air negative oxygen ions with adjustable temperature and humidity as described in claim 1, characterized in that, The jet tube has a mixing chamber, a constriction section, an oxygen inlet, a water inlet, and a first outlet, and the water inlet is connected to a water container. The step of introducing the compressed oxygen-enriched gas into the jet pipe to mix the compressed oxygen-enriched gas with the water to obtain a gas containing negative oxygen ions includes: The compressed oxygen-enriched solution is passed sequentially through the oxygen inlet, the mixing chamber, the contraction section, and the first outlet to create a negative pressure in the mixing chamber and draw water from the water container into the mixing chamber. The compressed oxygen-enriched gas collides with the water to form the gas containing negative oxygen ions, and the gas containing negative oxygen ions is ejected from the first outlet.

3. The method for preparing air negative oxygen ions with adjustable temperature and humidity as described in claim 2, characterized in that, The step of performing pressure swing adsorption on the dry compressed air to obtain compressed oxygen-enriched air includes: Adjust the switching valve and open the air inlet valve of the first molecular sieve tower so that the dry compressed air is introduced into the first molecular sieve tower, thereby pressurizing and adsorbing the dry compressed air by the molecular sieve particles in the first molecular sieve tower to obtain the compressed oxygen-enriched air. If the molecular sieve particles in the first molecular sieve tower are in a nitrogen-saturated state, adjust the switching valve and open the air inlet valve of the second molecular sieve tower to introduce the dry compressed air into the second molecular sieve tower; and open the exhaust valve of the first molecular sieve tower to depressurize and desorb the molecular sieve particles in the first molecular sieve tower. If the molecular sieve particles in the second molecular sieve tower are in a nitrogen-saturated state, adjust the switching valve and open the inlet valve of the first molecular sieve tower and the exhaust valve of the second molecular sieve tower.

4. The method for preparing air negative oxygen ions with adjustable temperature and humidity as described in claim 3, characterized in that, Before the step of introducing the compressed oxygen-enriched stream into the jet pipe, the method further includes: The compressed oxygen is first introduced into the oxygen storage tank, and then released from the oxygen storage tank and sequentially introduced into the monitoring instrument, the pressure control valve and the jet tube; Based on the monitoring parameters of the monitoring instrument, the pressure control valve is adjusted to regulate the air pressure entering the jet pipe.

5. The method for preparing air negative oxygen ions with adjustable temperature and humidity as described in claim 1, characterized in that, The step of preparing compressed air and passing the compressed air into the vortex tube and the temperature and humidity regulator respectively includes: Start the air compressor to compress outside air into the compressed air; The compressed air is first introduced into the air storage tank, and then released from the air storage tank and introduced into the vortex tube and the temperature and humidity regulator respectively. Adjust the valve at the outlet of the air reservoir to regulate the pressure and flow rate of the compressed air entering the vortex tube and the temperature and humidity regulator.

6. A pressure swing adsorption oxygen generator, characterized in that, include: Air compressor; Vortex tube; A temperature and humidity regulator includes a first housing, a refrigeration heat exchanger, and a heating heat exchanger. The refrigeration heat exchanger and the heating heat exchanger are both located inside the first housing. The outlet of the air compressor is connected to the inlet of the first housing and the inlet of the vortex tube, respectively. The cold air outlet of the vortex tube is connected to the inlet of the refrigeration heat exchanger, and the hot air outlet of the vortex tube is connected to the inlet of the heating heat exchanger. The exhaust ports of the refrigeration heat exchanger and the heating heat exchanger both extend out of the first housing, with the refrigeration heat exchanger being closer to the inlet of the first housing than the heating heat exchanger. A molecular sieve assembly, wherein the air inlet of the molecular sieve assembly is connected to the air outlet of the first housing; The negative ion component includes a jet tube, the oxygen inlet of which is connected to the air outlet of the molecular sieve component, and the water inlet of which is connected to a water body.

7. The pressure swing adsorption oxygen generator as described in claim 6, characterized in that, The molecular sieve assembly includes two molecular sieve towers, each equipped with an inlet valve and an outlet valve. The top of each molecular sieve tower has an inlet, and the bottom of each molecular sieve tower has an outlet. The outlet of the first housing is connected to the inlets of the two molecular sieve towers via the two inlet valves, and the bottom of each molecular sieve tower is connected to the oxygen inlet of the jet pipe via the outlet valve.

8. The pressure swing adsorption oxygen generator as described in claim 7, characterized in that, The molecular sieve tower is also equipped with a switching valve, an exhaust valve, and a pressure equalization valve. The outlet of the first shell is connected to the inlet of the switching valve through a first pipeline. One side outlet of the switching valve is connected to the inlet valve of the first molecular sieve tower through a second pipeline. The other side outlet of the switching valve is connected to the inlet valve of the second molecular sieve tower through a third pipeline. Each of the second pipeline and the third pipeline is equipped with an exhaust valve. The second pipeline and the third pipeline are connected through a fourth pipeline, and the pressure equalization valve is provided on the fourth pipeline.

9. The pressure swing adsorption oxygen generator as described in claim 6, characterized in that, The negative ion assembly also includes a water container. The jet tube has a mixing chamber, a constriction section, an oxygen inlet, a water inlet, and a first outlet. The oxygen inlet and the water inlet are both connected to the mixing chamber. The mixing chamber is connected to the first outlet through the constriction section. The inner diameter of the constriction section is smaller than the inner diameter of the mixing chamber and the diameter of the first outlet. The water inlet is detachably connected to the water container.

10. The pressure swing adsorption oxygen generator as described in claim 9, characterized in that, The temperature and humidity adjustable pressure swing adsorption oxygen generator also includes a pressure control valve and a monitoring instrument. The outlet of the molecular sieve assembly is connected to the oxygen inlet through the pressure control valve, and the monitoring instrument is located between the pressure control valve and the outlet of the molecular sieve assembly.

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