Oxygen enrichment device and oxygen enrichment process thereof

Abstract

The application relates to an oxygen-enriching device and an oxygen-enriching process thereof, and belongs to the technical field of jet propulsion devices. The oxygen-enriching device comprises an oxygen-enriching disc, one side of the oxygen-enriching disc is provided with an air inlet, and the other side is provided with a plurality of nitrogen-enriched separation outlets; a plurality of centrifugal separation flow channels are arranged in the oxygen-enriching disc, the plurality of centrifugal separation flow channels are sequentially and spacedly arranged along the circumference of the air inlet, one end of the centrifugal separation flow channel is communicated with the air inlet along the length direction of the centrifugal separation flow channel, and the other end penetrates through the oxygen-enriching disc in the direction away from the air inlet; the nitrogen-enriched separation outlet is arranged in one-to-one correspondence with the centrifugal separation flow channel, and the nitrogen-enriched separation outlet is communicated with the corresponding centrifugal separation flow channel; an air suction fan is arranged in the air inlet, and the air suction fan is coaxially connected with the oxygen-enriching disc; and a centrifugal driver is coaxially connected with the oxygen-enriching disc at the driving end. The oxygen-enriching device adopts a mechanical rotary separation mode, does not introduce other consumables, reduces the post-maintenance cost of the oxygen-enriching fan, and reduces the failure rate of the oxygen-enriching fan.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of jet propulsion devices, in particular to an oxygen enrichment device and an oxygen enrichment process thereof. BACKGROUND

[0002] A jet propulsion device is a power system based on Newton's third law, which generates a reaction force to push a spacecraft or carrier forward by high-speed jetting of a substance. At present, the jet propulsion device is mainly used in rocket engines and air jet engines of high-altitude aircraft, and in order to optimize the combustion efficiency of fuel in the jet propulsion device, improve the thrust-to-weight ratio, and enhance the ignition stability and combustion safety in the environment of high altitude and low oxygen, the existing jet propulsion device often needs to use oxygen-enriched air instead of regular air as a combustion-supporting agent.

[0003] In order to realize the supply of oxygen-enriched air, the existing jet device is usually integrated with an oxygen-enriching fan (also known as an air separation system), and the core task of the oxygen-enriching fan is to enrich oxygen in regular air to prepare oxygen-enriched air. In the oxygen-enriching fan, an oxygen-enriching device is mainly used to realize the enrichment of oxygen, and there are mainly two technical paths for the oxygen-enriching device to realize the enrichment of oxygen:

[0004] The first one is to extract high-concentration oxygen by the comprehensive action of a catalyst and an electromagnetic field. Specifically, a specific catalyst is used to reduce the dissociation energy barrier of oxygen molecules, and under the action of a strong electromagnetic field, the dissociation of air molecules and the selective migration / enrichment of oxygen ions are promoted, and finally high-concentration oxygen is obtained.

[0005] The second one is a membrane separation oxygen enrichment method. Specifically, relying on a high polymer or inorganic membrane assembly with gas selective permeation characteristics, the difference in solubility and diffusion rate of different gas components (mainly oxygen and nitrogen) in the membrane material is used to realize the selective permeation of oxygen, so as to achieve the purpose of increasing the oxygen concentration in the permeated gas.

[0006] For the related technologies in the above, whether the oxygen-enriching device uses the method of extracting high-concentration oxygen by the comprehensive action of a catalyst and an electromagnetic field or uses the membrane separation oxygen enrichment method, it is necessary to increase the corresponding consumables. Since the consumables need to be replaced regularly, the oxygen-enriching device needs to be frequently stopped for replacement of consumables during long-term operation, which will result in high cost of long-term operation and maintenance of the oxygen-enriching fan, and is not conducive to the long-term stable operation of the oxygen-enriching fan. SUMMARY

[0007] The present application provides an oxygen-enriching device and an oxygen-enriching process thereof, which aims to improve the oxygen-enriching process of the oxygen-enriching device, without using additional consumables, to reduce the high cost of long-term operation and maintenance of the oxygen-enriching fan, thereby facilitating the long-term stable operation of the oxygen-enriching fan.

[0008] In a first aspect, the application provides an oxygen enrichment device using the following technical solution:

[0009] An oxygen enrichment device includes an oxygen enrichment disc, an air inlet is formed on one side of the oxygen enrichment disc in an axial direction, and a plurality of nitrogen-rich separation outlets are formed on the other side; a plurality of centrifugal separation flow channels are formed in the oxygen enrichment disc, the plurality of centrifugal separation flow channels are sequentially and spaced apart in a circumferential direction of the air inlet, one end of the centrifugal separation flow channel is in communication with the air inlet along a length direction of the centrifugal separation flow channel, and the other end penetrates the oxygen enrichment disc away from the air inlet; the nitrogen-rich separation outlet is arranged in one-to-one correspondence with the centrifugal separation flow channel, and the nitrogen-rich separation outlet is in communication with the corresponding centrifugal separation flow channel; an air suction fan is located in the air inlet, and the air suction fan is coaxially connected with the oxygen enrichment disc; and a centrifugal driver is coaxially connected with the oxygen enrichment disc at a driving end.

[0010] By using the above technical solution, the oxygen enrichment device cooperates the oxygen enrichment disc, the air suction fan and the centrifugal driver, when the centrifugal driver works, the oxygen enrichment disc rotates synchronously with the air suction fan, so that the air suction fan can suck air into the air inlet of the oxygen enrichment disc and send it into the centrifugal separation flow channel, and the high-speed rotation of the oxygen enrichment disc can establish a centrifugal field.

[0011] Under the action of the centrifugal field, the nitrogen molecules and oxygen molecules in the air obtain different centrifugal speeds due to the difference in relative molecular mass, which causes the separation and enrichment of the oxygen molecules and nitrogen molecules in the centrifugal separation flow channel, the nitrogen-rich gas is discharged from the nitrogen-rich separation outlet, and the oxygen-rich gas is discharged from the other end of the centrifugal separation flow channel away from the air inlet. This realizes the separation and enrichment of the oxygen molecules and nitrogen molecules in the air, thereby increasing the oxygen content in the oxygen-rich gas, and thus meeting the function of the oxygen enrichment device.

[0012] Since the above-mentioned oxygen enrichment device adopts a pure mechanical rotary structure, it does not need to introduce other consumables, which can reduce the cost of long-term operation and maintenance of the oxygen enrichment fan, thereby facilitating the long-term stable operation of the oxygen enrichment fan.

[0013] Optionally, a primary separation ring is coaxially sleeved outside the oxygen enrichment disc, the primary separation ring encloses the centrifugal separation flow channel, a plurality of primary separation holes are formed through the primary separation ring, and the centrifugal separation flow channel is in communication with the corresponding primary separation hole.

[0014] By using the above technical solution, based on the arrangement of the primary separation ring, under the action of the centrifugal field, the oxygen-rich gas in the centrifugal separation flow channel will impact the primary separation ring, and then the oxygen-rich gas will flow into the corresponding centrifugal separation flow channel, thereby realizing the separation and enrichment of the nitrogen molecules and oxygen molecules in the oxygen-rich gas, which can further increase the oxygen content of the oxygen-rich gas. This makes the oxygen content of the oxygen-rich gas discharged through the primary separation hole higher.

[0015] In addition, based on the momentum difference between oxygen separation and nitrogen separation, nitrogen molecules in the oxygen-rich gas can be bounced back to the corresponding centrifugal separation flow channel for re-separation, and oxygen molecules can pass through the primary separation hole more efficiently, so that the nitrogen and oxygen separation and enrichment effect in the oxygen-rich gas is better.

[0016] Optionally, the primary separation ring is coaxially sleeved outside the secondary separation ring, and the primary separation ring and the secondary separation ring are coaxially spaced apart; the primary separation ring and the secondary separation ring are connected to the oxygen-rich disc at both axial ends, and the oxygen-rich disc closes the spacing between the primary separation ring and the secondary separation ring; a plurality of secondary separation holes are formed through the secondary separation ring.

[0017] By adopting the above technical scheme, based on the setting of the secondary separation ring, when the oxygen-rich gas passes through the primary separation ring and enters between the primary separation ring and the secondary separation ring, the oxygen-rich gas impacts the secondary separation ring, so that the oxygen-rich gas flows back and forth between the primary separation ring and the secondary separation ring.

[0018] Under the action of the centrifugal field, nitrogen and oxygen in the oxygen-rich gas between the first separation ring and the second separation ring are separated again, at this time, nitrogen molecules are enriched to form a nitrogen-rich backflow gas near the outer side of the primary separation ring, and oxygen molecules are enriched to form an oxygen-rich exhaust gas near the inner side of the secondary separation ring. During the flow of the oxygen-rich gas between the primary separation ring and the secondary separation ring, part of the nitrogen-rich backflow gas passes through the primary separation hole and backflows into the corresponding centrifugal separation flow channel; part of the oxygen-rich exhaust gas passes through the secondary separation hole and is discharged.

[0019] This can realize the separation and enrichment of nitrogen and oxygen molecules in air again, and also can improve the oxygen content of the oxygen-rich exhaust gas.

[0020] Optionally, a plurality of branch plates are arranged between the primary separation ring and the secondary separation ring, the plurality of branch plates are sequentially and spaced apart along the circumference of the primary separation ring, and adjacent two branch plates form a static chamber, and adjacent two static chambers are independently arranged; the primary separation hole and the secondary separation hole are in communication with the corresponding static chamber.

[0021] By adopting the above technical scheme, based on the setting of the static chamber, the oxygen-rich gas passing through the primary separation ring enters a plurality of different static chambers, which can reduce the relative disturbance between the oxygen-rich gas, weaken the turbulent flow effect of the oxygen-rich gas flow, and accelerate the separation and enrichment of nitrogen and oxygen in the corresponding static chamber.

[0022] In a second aspect, the application provides an oxygen enrichment process of an oxygen enrichment device, which comprises the following technical scheme: an oxygen enrichment process of an oxygen enrichment device, which is used in the above-mentioned oxygen enrichment device and comprises at least the following steps: S1, air is sucked into the oxygen enrichment disc from the air inlet and is sent into a plurality of centrifugal separation flow channels; S2, the oxygen enrichment disc is driven to rotate to establish a centrifugal field, under the action of the centrifugal field, nitrogen molecules and oxygen molecules in the air flowing in the centrifugal separation flow channel are separated, and the nitrogen molecules are enriched in the centrifugal separation flow channel to form enriched nitrogen gas, and the oxygen molecules are enriched in the centrifugal separation flow channel to form enriched oxygen gas; S3, the enriched nitrogen gas and the enriched oxygen gas are independently discharged from the oxygen enrichment disc.

[0023] By adopting the above technical scheme, the process realizes the separation and enrichment of nitrogen molecules and oxygen molecules in the air by using the centrifugal field generated by the rotation of the oxygen enrichment disc to form enriched nitrogen gas and enriched oxygen gas, which can meet the basic requirements of the oxygen enrichment process. Since the process does not need to use additional consumables, the maintenance cost and failure rate of the oxygen enrichment device using the oxygen enrichment process can be reduced.

[0024] Optionally, step S1 further comprises the following steps: S11, axial air intake: the air suction fan rotates to suck air into the air inlet; S12, preliminary nitrogen-oxygen centrifugal separation and enrichment: the air suction fan rotates to convert the air sucked into the air inlet into a rotating air flow, oxygen molecules in the rotating air flow are enriched to the outer layer of the rotating air flow, and nitrogen molecules are enriched to the inner layer of the rotating air flow; S13, air sending: the air suction fan rotates to deliver the rotating air flow into a plurality of centrifugal separation flow channels.

[0025] By adopting the above technical scheme, in the step of supplying air to the oxygen enrichment disc by the air suction fan, the air suction fan converts the air into a rotating air flow, the formation of the rotating air flow enables the nitrogen molecules and the oxygen molecules in the air to obtain different centrifugal speeds, so that the oxygen molecules are enriched to the outer layer of the rotating air flow, and the nitrogen molecules are enriched to the inner layer of the rotating air flow, thereby realizing the preliminary centrifugal separation and enrichment of nitrogen and oxygen in the air.

[0026] Optionally, step S2 comprises the following steps: S21, the oxygen enrichment disc is rotated at a high speed to establish a centrifugal field; S22, the air sent into the centrifugal separation flow channel flows along the length direction of the corresponding centrifugal separation flow channel, under the action of the centrifugal field, the nitrogen molecules and the oxygen molecules in the air obtain different centrifugal speeds due to the difference in relative molecular mass, under the different centrifugal speeds, the nitrogen molecules are enriched to one end of the centrifugal separation flow channel close to the air inlet to form a nitrogen enrichment zone containing enriched nitrogen gas, and the oxygen molecules are enriched to one end of the centrifugal separation flow channel away from the air inlet to form an oxygen enrichment zone containing enriched oxygen gas.

[0027] By adopting the technical scheme, the oxygen-enriched disc is rotated at high speed to establish a centrifugal field, so that the air sent into the separation flow channel obtains different centrifugal speeds due to the different relative molecular masses of nitrogen molecules and oxygen molecules in the flowing process, the separation of the nitrogen molecules and the oxygen molecules is realized, the nitrogen-enriched gas is formed at the end of the centrifugal separation flow channel close to the air inlet, and the oxygen-enriched gas is formed at the end of the centrifugal separation flow channel far from the air inlet, so that the oxygen-enriched gas can be discharged along the centrifugal separation flow channel, and the oxygen-enriched process can be realized.

[0028] Optionally, after step S22, the following steps are further included: the oxygen-enriched gas in the oxygen-enriched area is discharged from the centrifugal separation flow channel; the oxygen-enriched gas discharged from the centrifugal separation flow channel is backflowed into the centrifugal separation flow channel; under the action of the centrifugal field, the nitrogen molecules in the backflowed oxygen-enriched gas are enriched to the nitrogen-enriched area to increase the nitrogen content of the nitrogen-enriched gas, and the oxygen molecules are enriched to the oxygen-enriched area to increase the oxygen content of the oxygen-enriched gas.

[0029] By adopting the technical scheme, the oxygen-enriched gas discharged from the centrifugal separation flow channel is backflowed into the corresponding centrifugal separation flow channel, and under the action of the centrifugal field, the nitrogen molecules and the oxygen molecules in the oxygen-enriched gas are separated and enriched again, so that the nitrogen molecules are enriched to the nitrogen-enriched area to increase the nitrogen content of the nitrogen-enriched gas, and the oxygen molecules are enriched to the oxygen-enriched area to increase the oxygen content of the oxygen-enriched gas, thereby further improving the oxygen enrichment effect.

[0030] Optionally, after step S22, the following steps are further included: a plurality of static chambers are arranged outside the oxygen-enriched disc, one side of each static chamber is provided with a primary separation hole facing the air inlet, and the other side of each static chamber is provided with a secondary separation hole, the centrifugal separation flow channel, the primary separation hole, the static chamber and the secondary separation hole are sequentially communicated; the oxygen-enriched gas in the oxygen-enriched area is discharged from the centrifugal separation flow channel and into the corresponding static chamber; under the action of the centrifugal field, the nitrogen molecules in the oxygen-enriched gas are enriched to the side of the static chamber close to the air inlet and backflow into the corresponding centrifugal separation flow channel through the primary separation hole; and the oxygen molecules are enriched to the side of the static chamber far from the air inlet and discharged from the static chamber through the secondary separation hole.

[0031] By adopting the technical scheme, the oxygen-enriched gas discharged from the centrifugal separation flow channel is discharged into the corresponding static chamber, and under the action of the centrifugal field, the nitrogen molecules and the oxygen molecules in the oxygen-enriched gas are separated again, the nitrogen molecules are enriched to the side of the static chamber close to the air inlet and backflow into the centrifugal separation flow channel, and the oxygen molecules are enriched to the side of the static chamber far from the air inlet and discharged from the static chamber through the secondary separation hole, so that the separation and enrichment of the nitrogen molecules and the oxygen molecules in the oxygen-enriched gas can be realized again, and the oxygen enrichment effect is further improved.

[0032] Optionally, in step S2, the rotating speed of the oxygen-enriched disc is 3500 r / min to 4500 r / min.

[0033] By adopting the technical scheme, when the rotating speed range of the oxygen enrichment disc is between 3500 r / min and 4500 r / min, sufficient centrifugal force can be ensured in the centrifugal separation process, so that the separation and enrichment of nitrogen molecules and oxygen molecules in air can be effectively realized.

[0034] In summary, the present application has at least one of the following beneficial technical effects:

[0035] 1. The oxygen enrichment equipment of the present application realizes the separation and enrichment of nitrogen molecules and oxygen molecules in air by adopting the centrifugal separation mode through the cooperation of the oxygen enrichment disc and the air suction fan, which can realize the function of oxygen enrichment. Since the oxygen enrichment equipment of the present application adopts the mechanical rotary separation mode, no other consumables are introduced, the maintenance cost of the oxygen enrichment fan in the later period is reduced, and the failure rate of the oxygen enrichment fan is reduced.

[0036] 2. The oxygen enrichment equipment of the present application can separate and enrich air multiple times through the cooperation of the oxygen enrichment disc, the primary separation ring and the secondary separation ring, which can improve the oxygen enrichment effect.

[0037] 3. The design of the oxygen enrichment process of the present application can separate and enrich nitrogen molecules and oxygen molecules in air multiple times, thereby improving the oxygen content of the final oxygen-enriched exhaust gas. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a schematic diagram of the overall structure of the oxygen enrichment equipment of embodiment 1 of the present application.

[0039] Figure 2 is a schematic diagram of the overall structure of the oxygen enrichment disc, the air suction fan and the centrifugal driver of embodiment 1 of the present application.

[0040] Figure 3 is an exploded structural schematic diagram of the oxygen enrichment disc and the air suction fan of embodiment 1 of the present application.

[0041] Figure 4 is a sectional view structural schematic diagram of the oxygen enrichment disc of embodiment 1 of the present application.

[0042] Figure 5 is a schematic diagram of the overall structure of the oxygen enrichment disc and the secondary oxygen enrichment mechanism of embodiment 2 of the present application.

[0043] Figure 6 is an exploded structural schematic diagram of the oxygen enrichment disc and the secondary oxygen enrichment mechanism of embodiment 2 of the present application.

[0044] Figure 7 is an exploded structural schematic diagram of the secondary oxygen enrichment mechanism of embodiment 2 of the present application.

[0045] Figure 8is a cross-sectional structure schematic diagram of a secondary oxygen enrichment mechanism of Embodiment 2 of the present application.

[0046] Figure 9 is an exploded structure schematic diagram of an oxygen enrichment disc of Embodiment 2 of the present application.

[0047] Figure 10 is a whole structure schematic diagram of a mounting ring frame of Embodiment 2 of the present application.

[0048] In the figure, 1, oxygen enrichment disc; 11, face plate; 12, back plate; 13, air inlet; 14, centrifugal separation flow channel; 15, nitrogen enrichment separation outlet; 16, centrifugal guide plate; 17, mounting ring frame; 171, inner ring; 172, outer ring; 173, first rotating guide plate; 174, second rotating guide plate; 2, air suction fan; 21, fixed shaft; 22, axial guide plate; 3, centrifugal driver; 4, primary separation ring; 41, primary separation hole; 5, secondary separation ring; 51, support plate; 52, static chamber; 53, secondary separation hole; 100, shell; 101, oxygen enrichment pipe; 102, nitrogen enrichment pipe; 103, control valve; 200, secondary oxygen enrichment mechanism; 201, face ring; 202, back ring; 203, support plate; 204, first straight groove; 205, second straight groove; 300, first sealing connection ring; 400, second sealing connection ring. DETAILED DESCRIPTION

[0049] The following will be described in detail with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 10 The present application will be further described in detail.

[0050] Embodiment 1: an oxygen enrichment device, referring to Figure 1 and Figure 2 , comprising a shell 100, an oxygen enrichment disc 1, and a centrifugal driver 3, the shell 100 is wrapped outside the oxygen enrichment disc 1, and the centrifugal driver 3 is coaxially connected with the oxygen enrichment disc 1.

[0051] Referring to Figure 2 and Figure 3 , the oxygen enrichment device 100 further comprises an air suction mechanism 2, and the air suction fan 2 is coaxially connected with the oxygen enrichment disc 1.

[0052] Referring to Figure 2 and Figure 3 , the oxygen enrichment disc 1 comprises a face plate 11 and a back plate 12, the face plate 11 and the back plate 12 are coaxially and spaced apart, the face plate 11 is provided with an air inlet 13 coaxially and through, the air suction fan 2 is coaxially mounted on the back plate 12, and the air suction fan 2 is located in the air inlet 13, and the back plate 12 is coaxially connected with a driving end of the centrifugal driver 3.

[0053] Referring to Figure 3 and Figure 4A plurality of centrifugal separation flow channels 14 are formed between the panel 11 and the back plate 12, the plurality of centrifugal separation flow channels 14 are sequentially and spaced apart along the circumference of the air inlet 13, and adjacent two centrifugal separation flow channels 14 are independently arranged, the centrifugal separation flow channel 14 is communicated with the air inlet 13 at one end along the length direction of itself, and the other end extends away from the air inlet 13 and is communicated with the external space of the oxygen enrichment disc 1.

[0054] Referring to Figure 2 and Figure 4 , a plurality of nitrogen enrichment separation outlets 15 are formed on the back plate 12, the nitrogen enrichment separation outlets 15 are arranged one by one with the centrifugal separation flow channels 14, and the centrifugal separation flow channels 14 are communicated with the corresponding nitrogen enrichment separation outlets 15.

[0055] Referring to Figure 1 and Figure 4 , the shell 100 is communicated with the oxygen enrichment pipe 101 and the nitrogen enrichment pipe 102 which are independently arranged, the oxygen enrichment pipe 101 is communicated with the plurality of centrifugal separation flow channels 14, and the nitrogen enrichment pipe 102 is communicated with the plurality of nitrogen enrichment separation outlets 15, and the control valve 103 is arranged on the oxygen enrichment pipe 101 and the nitrogen enrichment pipe 102.

[0056] In this embodiment, referring to Figure 3 , the air suction fan 2 includes a fixed shaft 21, a plurality of axial guide plates 22 are arranged on the outer side wall of the fixed shaft 21, and the plurality of axial guide plates 22 are sequentially and spaced apart along the circumference of the fixed shaft 21.

[0057] In this embodiment, referring to Figure 2 , the centrifugal driver 3 adopts a motor.

[0058] In this embodiment, referring to Figure 3 and Figure 4 , a plurality of centrifugal guide plates 16 are arranged between the panel 11 and the back plate 12, one end of the centrifugal guide plate 16 extends towards the air inlet 13 along the length direction of itself, and the other end extends away from the air inlet 13, and the two sides of the centrifugal guide plate 16 in the width direction are connected with the panel 11 and the back plate 12 respectively. The plurality of centrifugal guide plates 16 are sequentially and spaced apart along the circumference of the air inlet 13 of the panel 11, and one centrifugal separation flow channel 14 is formed between adjacent two centrifugal guide plates 16.

[0059] In this embodiment, referring to Figure 3 and Figure 4 , the oxygen enrichment device further includes a primary separation ring 4, the primary separation ring 4 is located between the panel 11 and the back plate 12, and the panel 11, the primary separation ring 4 and the back plate 12 are coaxially arranged, and the two axial ends of the primary separation ring 4 are connected with the panel 11 and the back plate 12 respectively.

[0060] Referring to Figure 3The plurality of centrifugal guide plates 16 are located in the primary separation ring 4, and the centrifugal guide plates 16 are connected with the inner side wall of the primary separation ring 4 at the end away from the air inlet 13 along the length direction of the centrifugal guide plates 16. Therefore, the primary separation ring 4 closes the end of the plurality of centrifugal separation flow channels 14 away from the air inlet 13.

[0061] Referring to Figure 3 A plurality of primary separation holes 41 are formed through the primary separation ring 4, and each centrifugal separation flow channel 14 is connected with a plurality of primary separation holes 41.

[0062] In this embodiment, referring to Figure 3 and Figure 4 The oxygen enrichment device further comprises a secondary separation ring 5, the secondary separation ring 5 is located between the face plate 11 and the back plate 12, the face plate 11, the secondary separation ring 5 and the back plate 12 are coaxially arranged, and the two axial ends of the secondary separation ring 5 are connected with the face plate 11 and the back plate 12 respectively. The secondary separation ring 5 is coaxially sleeved outside the primary separation ring 4, and the primary separation ring 4 is spaced apart from the secondary separation ring 5.

[0063] Referring to Figure 3 and Figure 4 A plurality of support plates 51 are arranged between the secondary separation ring 5 and the primary separation ring 4, the length direction of the support plates 51 is arranged along the axial direction of the face plate 11, the two ends of the length direction of the support plates 51 are connected with the face plate 11 and the back plate 12 respectively, the two sides of the width direction of the support plates 51 are connected with the outer side wall of the primary separation ring 4 and the inner side wall of the secondary separation ring 5 respectively, the plurality of support plates 51 are sequentially and uniformly spaced apart along the circumferential direction of the secondary separation ring 5, and the static chamber 52 is formed between any two adjacent support plates 51.

[0064] Referring to Figure 4 A plurality of secondary separation holes 53 are formed through the secondary separation ring 5, and each static chamber 52 is connected with a plurality of primary separation holes 41 and a plurality of secondary separation holes 53.

[0065] The implementation principle of the embodiment of the present application is that when oxygen enrichment is needed, the oxygen enrichment device in the oxygen enrichment fan works, and the centrifugal driver 3 drives the oxygen enrichment disc 1 to rotate at a high speed coaxially with the air suction fan 2.

[0066] During the rotation of the oxygen enrichment disc 1, the rotation of the air suction fan 2 causes the external air to be sucked into the oxygen enrichment disc 1 from the air inlet 13, and the air is forced to deflect into a high-speed rotational flow by the axial guide plate 22, and the high-speed rotational flow is transported into the plurality of centrifugal separation flow channels 14.

[0067] In the centrifugal separation flow channel 14, due to the existence of the rotational centrifugal force, a centrifugal force field is formed in the centrifugal separation flow channel 14, and the first separation and enrichment of nitrogen and oxygen of the airflow occurs in the centrifugal force field.

[0068] The specific principle of the first separation and enrichment of nitrogen and oxygen is that, because the mass of oxygen molecules is greater than that of nitrogen molecules, the centrifugal force on the oxygen molecules is greater than that on the nitrogen molecules, and the centrifugal speed of the oxygen molecules is greater than that of the nitrogen molecules, so that the oxygen molecules and the nitrogen molecules are separated when the gas flow flows in the centrifugal separation flow channel 14, and the oxygen molecules are enriched to the end of the centrifugal separation flow channel 14 close to the primary separation ring 4, thereby forming oxygen-rich gas; and the nitrogen molecules are enriched to the end of the centrifugal separation flow channel 14 close to the air inlet 13, thereby forming nitrogen-rich gas. Therefore, the first separation and enrichment of nitrogen and oxygen are achieved in the centrifugal separation flow channel 14, and the oxygen-rich area and the nitrogen-rich area are formed in the centrifugal separation flow channel 14.

[0069] After the first separation and enrichment of nitrogen and oxygen, the nitrogen-rich gas is discharged through the back plate 12 in turn through the corresponding nitrogen-rich separation outlet 15 and the nitrogen-rich pipe 102. The oxygen-rich gas hits the primary separation ring 4 to achieve the second separation and enrichment of oxygen and nitrogen.

[0070] The specific principle of the second separation and enrichment of oxygen and nitrogen is that, when the oxygen-rich gas hits the primary separation ring 4, the oxygen-rich gas collides with the primary separation ring 4, at which time the oxygen-rich gas flows in a swirling manner towards the air inlet 13. In the process of swirling flow, due to the existence of the centrifugal field, the oxygen molecules and the nitrogen molecules in the swirling flow of the oxygen-rich gas are further separated, the nitrogen molecules are enriched to the nitrogen-rich area, and the oxygen molecules are enriched to the oxygen-rich area, which can further improve the separation effect of nitrogen and oxygen and the oxygen enrichment effect, thereby improving the oxygen content of the oxygen-rich gas in the oxygen-rich area.

[0071] The oxygen molecules enriched in the oxygen-rich area pass through the primary separation hole 41 in the primary separation ring 4, so that the oxygen-rich gas is discharged from the primary separation ring 4.

[0072] In addition, in this process, in addition to the action of the centrifugal field, based on the momentum difference between oxygen molecules and nitrogen molecules, after the nitrogen molecules collide with the primary separation ring 4, the nitrogen molecules are bounced back to the corresponding centrifugal separation flow channel 14 for re-separation; after the oxygen molecules collide with the primary separation ring 4, the oxygen molecules move along the tangent of the primary separation ring 4, and then the oxygen molecules are still enriched to the inside wall position of the primary separation ring 4, so that the oxygen molecules can pass through the primary separation hole 41 more efficiently, thereby ensuring the oxygen content of the oxygen-rich gas discharged from the primary separation ring 4.

[0073] After the second separation and enrichment of nitrogen and oxygen, the oxygen-rich gas enters the stationary chamber 52 through the primary separation hole 41 to achieve the third separation and enrichment of nitrogen and oxygen.

[0074] The specific principle of the third separation of nitrogen and oxygen is that after the oxygen-rich gas enters the static chamber 52 through the first separation hole 41, the oxygen-rich gas rotates in the corresponding static chamber 52, and in this process, due to the continuous existence of the centrifugal field, the nitrogen molecules in the oxygen-rich gas migrate towards the first separation ring 4, and the oxygen molecules migrate towards the second separation ring 5, thereby realizing the third separation and enrichment of nitrogen and oxygen. After that, the oxygen-rich gas near the second separation ring 5 in the static chamber 52 is discharged through the second separation hole 53, and the nitrogen-rich gas near the first separation ring 4 is reflowed into the corresponding centrifugal separation flow channel 14 through the first separation hole 41.

[0075] After the third separation and enrichment of nitrogen and oxygen, the oxygen-rich gas passes through the second separation ring 5 and is discharged from the oxygen-rich pipe 101.

[0076] In the process of discharging the oxygen-rich gas and the nitrogen-rich gas, by adjusting the opening and closing size of the two control valves 103 on the nitrogen-rich pipe 102 and the oxygen-rich pipe 101, the flow rate of the nitrogen-rich pipe 102 and the oxygen-rich pipe 101 can be adjusted, thereby controlling the nitrogen separation concentration and the oxygen molecule concentration in the oxygen enrichment disc 1, and further controlling the nitrogen content of the discharged nitrogen-rich gas and the oxygen content of the oxygen-rich gas.

[0077] In summary, the oxygen enrichment device realizes the third separation and enrichment of nitrogen and oxygen in air through mechanical rotary separation, which can effectively improve the oxygen enrichment effect.

[0078] The embodiment also discloses an oxygen enrichment process of the oxygen enrichment device, which comprises the following steps.

[0079] S1, air suction: air is sucked into the oxygen enrichment disc 1 along the axial direction of the oxygen enrichment disc 1 from the air inlet 13, and the air is sent into the plurality of centrifugal separation flow channels 14, and the air entering the centrifugal separation flow channel 14 flows along the length direction of the corresponding centrifugal separation flow channel 14 to the outside of the oxygen enrichment disc 1.

[0080] Specifically, the step S1 comprises the following steps:

[0081] S11, axial air inlet: the centrifugal driver 3 drives the air suction fan 2 to rotate, so that the air outside the oxygen enrichment disc 1 is sucked into the air inlet 13 along the axial direction of the oxygen enrichment disc 1.

[0082] S12, preliminary centrifugal separation and enrichment of nitrogen and oxygen: under the action of the air suction fan 2, the air sucked into the air inlet 13 is converted into a rotating gas flow, the oxygen molecules in the rotating gas flow are enriched to the outer layer of the rotating gas flow, the nitrogen molecules are enriched to the inner layer of the rotating gas flow, and the oxygen molecules and the nitrogen molecules in the rotating gas flow are preliminarily separated and enriched.

[0083] Specifically, the air suction fan 2 rotates at high speed to establish a centrifugal field in the air inlet 13. The air inhaled into the oxygen enrichment disc 1 is converted into a rotating air flow under the action of the axial guide plate 22 of the air suction fan 2. Under the action of the rotation of the rotating air flow itself and the centrifugal field of the air suction fan 2, the oxygen molecules and nitrogen molecules with different relative molecular masses in the rotating air flow obtain different centrifugal speeds. Among them, the oxygen molecules with relatively large molecular mass obtain a larger centrifugal speed, and the nitrogen molecules with relatively small molecular mass in the rotating air flow obtain a smaller centrifugal speed. Thus, the oxygen molecules are enriched to the outer layer of the rotating air flow, and the nitrogen molecules are enriched to the inner layer of the rotating air flow, and the oxygen molecules and nitrogen molecules in the rotating air flow are preliminarily separated and enriched.

[0084] Specifically, in step S12, the oxygen molecules in the outer layer of the rotating air flow are enriched to form enriched oxygen, and the oxygen content of the enriched oxygen can reach 23%. The oxygen content in the air outside the oxygen enrichment disc 1 is 21%.

[0085] S13, air sending: the air suction fan 2 rotates to deliver the rotating air flow into a plurality of centrifugal separation flow channels 14, and the air delivered into the centrifugal separation flow channel 14 flows along the length direction of the corresponding centrifugal separation flow channel 14 to the outside of the oxygen enrichment disc 1.

[0086] S2, nitrogen-oxygen centrifugal separation and enrichment: the oxygen enrichment disc 1 is driven to rotate to establish a centrifugal field, under the action of the centrifugal field, the oxygen molecules and nitrogen molecules in the air in the centrifugal separation flow channel 14 are separated, the nitrogen molecules are enriched to the end of the centrifugal separation flow channel 14 close to the air inlet 13 to form a rich nitrogen area containing enriched nitrogen; the oxygen molecules are enriched to the end of the centrifugal separation flow channel 14 away from the air inlet 13 to form a rich oxygen area containing enriched oxygen.

[0087] Specifically, step S2 includes the following steps:

[0088] S21, the oxygen enrichment disc 1 rotates at high speed to establish a centrifugal field.

[0089] Specifically, under the driving of the centrifugal driver 3, the oxygen enrichment disc 1 rotates at high speed, thereby establishing a centrifugal field in the oxygen enrichment disc 1, and thereby establishing a centrifugal field in each centrifugal separation flow channel 14.

[0090] Specifically, the rotating speed of the oxygen enrichment disc is 3500r / min-4500r / min. Preferably, the rotating speed of the oxygen enrichment disc is 4000r / min.

[0091] S22, primary centrifugal separation and enrichment: the air sent into the centrifugal separation flow channel 14 flows along the length direction of the corresponding centrifugal separation flow channel 14, and under the action of the centrifugal force field, the nitrogen molecules and oxygen molecules in the air obtain different centrifugal speeds due to the different relative molecular masses, and under the different centrifugal speeds, the centrifugal separation flow channel 14 close to one end of the air inlet 13 forms a nitrogen-rich area containing enriched nitrogen; the oxygen molecules are enriched to one end of the centrifugal separation flow channel 14 away from the air inlet 13 to form an oxygen-rich area containing enriched oxygen.

[0092] Specifically, in the process of air flowing in the corresponding centrifugal separation flow channel 14, under the action of the centrifugal force field, the oxygen molecules with larger relative molecular mass in the air obtain larger centrifugal speed, and the nitrogen molecules with smaller relative molecular mass in the air obtain smaller centrifugal speed, so that the nitrogen molecules and oxygen molecules in the air are separated along the length direction of the corresponding centrifugal separation flow channel 14. Among them, the nitrogen molecules are enriched to the nitrogen-rich area close to the air inlet 13 of the corresponding centrifugal separation flow channel 14 to form nitrogen-rich gas, and the oxygen molecules are enriched to the oxygen-rich area away from the air inlet 13 of the corresponding centrifugal separation flow channel 14 to form oxygen-rich gas.

[0093] Therefore, under the action of the centrifugal force field, the air entering the centrifugal separation flow channel 14 realizes the first nitrogen-oxygen separation and enrichment. At this time, the oxygen content in the oxygen-rich gas in the oxygen-rich area can reach 28%.

[0094] S23, secondary centrifugal separation and enrichment.

[0095] S231, the oxygen-rich gas in the oxygen-rich area is discharged from the corresponding centrifugal separation flow channel 14.

[0096] Specifically, under the action of the centrifugal force field, the oxygen-rich gas flows towards the end of the centrifugal separation flow channel 14, so that the oxygen-rich gas has a tendency to be discharged from the corresponding centrifugal separation flow channel 14.

[0097] S232, the oxygen-rich gas discharged from the centrifugal separation flow channel 14 is backflowed into the corresponding centrifugal separation flow channel 14.

[0098] Specifically, the oxygen-rich gas discharged from the centrifugal separation flow channel 14 directly impacts on the inner wall of the primary separation ring 4, and after the oxygen-rich gas impacts on the inner wall of the primary separation ring 4, the oxygen-rich gas flows in a spiral direction away from the primary separation ring 4, so that the oxygen-rich gas flows in a spiral direction into the corresponding centrifugal separation flow channel 14.

[0099] S233, under the action of the centrifugal force field, the nitrogen molecules in the backflowed oxygen-rich gas are enriched to the nitrogen-rich area to increase the nitrogen content of the nitrogen-rich gas, and the oxygen molecules in the backflowed oxygen-rich gas are enriched to the oxygen-rich area to increase the oxygen content of the oxygen-rich gas.

[0100] Specifically, under the action of the centrifugal field, the nitrogen molecules and oxygen molecules in the backflow oxygen-enriched gas are separated again. Due to the different centrifugal speeds, the nitrogen molecules in the oxygen-enriched gas are enriched to the corresponding nitrogen-enriched area, which can reduce the nitrogen content in the oxygen-enriched gas; and the oxygen molecules in the oxygen-enriched gas are enriched to the corresponding oxygen-enriched area, which can increase the oxygen content in the oxygen-enriched gas.

[0101] The principle of separation and enrichment of nitrogen molecules and oxygen molecules in the backflow oxygen-enriched gas is the same as that in step S22.

[0102] Therefore, step S23 realizes the second separation and enrichment of nitrogen and oxygen. At this time, the oxygen content in the oxygen-enriched gas in the oxygen-enriched area can reach 33%.

[0103] S24, third centrifugal separation and enrichment.

[0104] S241, the oxygen-enriched gas in the oxygen-enriched area is discharged into the corresponding centrifugal separation flow channel 14 and discharged into the corresponding stationary chamber 52.

[0105] Specifically, under the synergistic action of the centrifugal field, the pressure in the centrifugal separation flow channel 14, and the kinetic energy of the oxygen-enriched gas molecules, the oxygen-enriched gas in the oxygen-enriched area will pass through the primary separation hole 41 on the primary separation ring 4, so that the oxygen-enriched gas enters the corresponding stationary chamber 52.

[0106] S242, under the action of the centrifugal field, the nitrogen molecules in the oxygen-enriched gas are enriched to one side of the stationary chamber 52 close to the air inlet 13 and backflow into the corresponding centrifugal separation flow channel 14 through the primary separation hole 41; and the oxygen molecules are enriched to the other side of the stationary chamber 52 away from the air inlet 13 and discharged from the stationary chamber 52 through the secondary separation hole 53.

[0107] Specifically, under the action of the centrifugal field, the nitrogen molecules and oxygen molecules in the oxygen-enriched gas entering the stationary chamber 52 are separated again. In the stationary chamber 52, the nitrogen molecules are enriched to the outside of the primary separation ring 4 to form nitrogen-enriched backflow gas, and the oxygen molecules are enriched to the inside of the secondary separation ring 5 to form oxygen-enriched discharge gas.

[0108] When the oxygen-enriched gas enters the corresponding stationary chamber 52, the oxygen-enriched gas will generate a swirling flow in the corresponding stationary chamber 52. In the process of this swirling flow, the backflow nitrogen-enriched gas is close to the primary separation ring 4, which makes the backflow nitrogen-enriched gas backflow into the corresponding centrifugal separation flow channel 14 through the primary separation hole 41; and the oxygen-enriched discharge gas is close to the secondary separation ring 5, which makes the oxygen-enriched discharge gas discharge to the outside of the secondary separation ring 5 through the secondary separation hole 53.

[0109] The principle of separating and enriching nitrogen molecules from oxygen molecules in the oxygen-rich gas in the standing chamber 52 is the same as that of separating and enriching nitrogen molecules from oxygen molecules in the air in step S22.

[0110] Therefore, step S24 realizes the third separation and enrichment of nitrogen and oxygen, and the oxygen content in the oxygen-rich exhaust gas can reach 38%.

[0111] S3, gas exhaust: the nitrogen-rich gas and the oxygen-rich gas are independently exhausted from the oxygen-rich disc 1.

[0112] Specifically, the nitrogen-rich gas is exhausted from the corresponding nitrogen-rich separation outlet 15 to the corresponding nitrogen-rich pipe 102, and then is exhausted through the nitrogen-rich pipe 102. The oxygen-rich gas is sequentially exhausted through the first separation ring 4, the standing chamber 52, the second separation ring 5, and the oxygen-rich pipe 101.

[0113] During the process of exhausting the nitrogen-rich gas and the oxygen-rich gas, the outlet sizes of the nitrogen-rich gas and the oxygen-rich gas can be changed by controlling the two control valves 103, so that the exhaust speed of the nitrogen-rich gas and the oxygen-rich gas in the oxygen-rich disc 1 can be controlled. When the exhaust speed of the nitrogen-rich gas is reduced, there will be more nitrogen-rich gas in the oxygen-rich disc 1, which will cause the nitrogen content in the oxygen-rich gas to increase, thereby causing the oxygen content in the oxygen-rich gas to decrease, so that the oxygen content in the oxygen-rich air exhausted by the oxygen-rich blower can be controlled.

[0114] Therefore, in the gas exhaust step, by controlling the opening degree of the two control valves 103, the oxygen content in the oxygen-rich gas exhausted by the oxygen-rich pipe 101 can be dynamically adjusted, and the nitrogen content in the nitrogen-rich gas exhausted by the nitrogen-rich pipe 102 can be adjusted.

[0115] The implementation principle of the embodiment of the application is that: through the above-mentioned oxygen enrichment process, a centrifugal field is established by the rotation of the oxygen-rich disc 1, the centrifugal field separates and enriches nitrogen and oxygen in the air multiple times, and gradually increases the oxygen content in the oxygen-rich gas. Compared with the existing oxygen enrichment process, the present process only relies on mechanical structure and does not need additional consumables, thereby reducing the cost and improving the stability and reliability of the equipment.

[0116] Embodiment 2: an oxygen enrichment device, referring to Figure 5 and Figure 6 The difference between the present embodiment and embodiment 1 is that the oxygen-rich disc 1 is provided with a secondary oxygen enrichment mechanism 200.

[0117] Referring to Figure 5 and Figure 7The secondary separation ring 5, the supporting plate 51 and the primary separation ring 4 are located outside the oxygen enrichment disc 1, the secondary separation ring 5 is provided with a back ring 202 at one end in the axial direction and a face ring 201 at the other end, the primary separation ring 4 is connected with the back ring 202 and the face ring 201 at two ends in the axial direction respectively, and the supporting plate 51 is connected with the back ring 202 and the face ring 201 at two ends in the length direction respectively. The face ring 201, the back ring 202, the primary separation ring 4, the secondary separation ring 5 and the supporting plates 51 form the secondary oxygen enrichment mechanism 200.

[0118] In the embodiment, the primary separation ring 4, the secondary separation ring 5 and the supporting plate 51 are detachably connected with the face ring 201 and the back ring 202.

[0119] Specifically, the primary separation ring 4 is connected with the inner side wall of the face ring 201 and the inner side wall of the back ring 202 through screws; similarly, the secondary separation ring 5 is connected with the inner side wall of the face ring 201 and the inner side wall of the back ring 202 through screws.

[0120] In the embodiment, referring to Figure 7 The back ring 202 and the face ring 201 are provided with a plurality of supporting plates 203, the two ends of the supporting plates 203 are detachably connected with the back ring 202 and the face ring 201 respectively, and the supporting plates 203 are sequentially and spacedly arranged along the circumferential direction of the back ring 202.

[0121] Specifically, the back ring 202 and the face ring 201 are connected with the supporting plates 203 through bolts, and the opposite sides of the supporting plates 203 abut against the outer side wall of the primary separation ring 4 and the inner side wall of the secondary separation ring 5 respectively.

[0122] In the embodiment, referring to Figure 7 and Figure 8 The face ring 201 is provided with a plurality of first straight grooves 204, and the first straight grooves 204 are sequentially and spacedly arranged along the circumferential direction of the face ring 201. The face ring 201 is provided with a plurality of second straight grooves 205, the first straight grooves 204 and the second straight grooves 205 are one-to-one correspondingly arranged, and the first straight grooves 204 and the corresponding second straight grooves 205 are arranged in the axial direction of the back plate 12.

[0123] Referring to Figure 7 and Figure 8 The number of the first straight grooves 204 is not less than the number of the supporting plates 51, a plurality of the first straight grooves 204 and the supporting plates 51 are one-to-one correspondingly arranged, one end of the supporting plate 51 in the length direction is inserted and matched with the corresponding first straight groove 204, the other end is inserted and matched with the corresponding second straight groove 205, and the two ends of the supporting plate 51 in the width direction abut against the outer side wall of the primary separation ring 4 and the inner side wall of the secondary separation ring 5 respectively.

[0124] Referring to Figure 7 and Figure 8, based on the structural arrangement of the secondary oxygen enrichment mechanism 200, the detachable design of the secondary oxygen enrichment mechanism 200, the number of the branch plates 51 is convenient to increase or decrease, thereby the size and the number of the static chambers 52 are convenient to adjust, which can change the oxygen enrichment capacity of the secondary oxygen enrichment mechanism 200.

[0125] With reference to Figure 5 and Figure 6 , the secondary oxygen enrichment mechanism 200 is detachably connected with the oxygen enrichment disc 1.

[0126] In this embodiment, with reference to Figure 5 and Figure 6 , the first sealing connection ring 300 is arranged between the face ring 201 and the face plate 11, the first sealing connection ring 300 is coaxially arranged with the face ring 201, and the face ring 201 and the face plate 11 are both connected with the first sealing connection ring 300 through bolts, and the first sealing connection ring 300 closes the gap between the face ring 201 and the face plate 11.

[0127] Similarly, the second sealing connection ring 400 is arranged between the back ring 202 and the back plate 12, the second sealing connection ring 400 is coaxially arranged with the back ring 202, and the back ring 202 and the back plate 12 are both connected with the second sealing connection ring 400 through bolts, and the second sealing connection ring 400 closes the gap between the back ring 202 and the back plate 12.

[0128] With reference to Figure 7 and Figure 9 , the oxygen enrichment disc 1 further comprises a mounting ring frame 17, the face plate 11, the mounting ring frame 17 and the back plate 12 are coaxially arranged in sequence, and the mounting ring frame 17 is connected with the face plate 11 and the back plate 12 at the two axial ends respectively, and the plurality of centrifugal flow guide plates 16 are all mounted in the mounting ring frame 17, and the centrifugal flow guide plates 16 are respectively abutted with the face plate 11 and the back plate 12 at the two width directions.

[0129] With reference to Figure 10 , the mounting ring frame 17 comprises two inner rings 171 and two outer rings 172, the two inner rings 171 are coaxially and spaced apart, the inner rings 171 and the outer rings 172 are one-to-one correspondingly arranged, and the outer rings 172 are coaxially sleeved outside the corresponding inner rings 171, and the inner rings 171 are spaced apart from the corresponding outer rings 172.

[0130] With reference to Figure 10 , a plurality of first rotating flow guide plates 173 are arranged between the two inner rings 171, the plurality of first rotating flow guide plates 173 are sequentially and spaced apart along the circumferential direction of the inner ring 171, the length direction of the first rotating flow guide plate 173 is arranged along the axial direction of the inner ring 171, and the first rotating flow guide plate 173 is rotatably and detachably connected with the corresponding inner ring 171 along the length direction thereof.

[0131] Similarly, with reference to Figure 10, a plurality of second rotating guide plates 174 are arranged between the two outer rings 172, the plurality of second rotating guide plates 174 are sequentially and spaced apart along the circumference of the outer ring 172, the length direction of the second rotating guide plate 174 is arranged axially along the outer ring 172, and the second rotating guide plate 174 is rotatably and detachably connected with the corresponding outer ring 172 along the length direction thereof.

[0132] Referring to Figure 10 , the plurality of centrifugal guide plates 16 are located between the inner ring 171 and the corresponding outer ring 172, and the plurality of centrifugal guide plates 16 are sequentially and spaced apart along the circumference of the inner ring 171. The first rotating guide plate 173, the second rotating guide plate 174 and the centrifugal guide plate 16 are arranged one by one, and one end of the centrifugal guide plate 16 is detachably connected with the first rotating guide plate 173 along the length direction thereof, and the other end is detachably connected with the second rotating guide plate 174.

[0133] Under the cooperation of the first rotating guide plate 173 and the second rotating guide plate 174, the corresponding centrifugal guide plate 16 is installed, which realizes the installation of the plurality of centrifugal guide plates 16 in the ring frame 17. Since the first rotating guide plate 173 and the second rotating guide plate 174 are detachably connected with the corresponding centrifugal guide plate 16, the centrifugal guide plate 16 is convenient to disassemble and replace, so that the oxygen enrichment disc 1 of the present application can use different centrifugal guide plates 16, and the subsequent centrifugal guide plate 16 can be reassembled and assembled with new centrifugal guide plates 16 after improvement.

[0134] In this embodiment, referring to Figure 10 , one end of the first rotating guide plate 173 and the corresponding centrifugal guide plate 16 towards the inner ring 171 is arranged in parallel, and the one end of the first rotating guide plate 173 and the corresponding centrifugal guide plate 16 towards the inner ring 171 is attached. Similarly, one end of the second rotating guide plate 174 and the corresponding centrifugal guide plate 16 towards the outer ring 172 is arranged in parallel, and one end of the second rotating guide plate 174 and the corresponding centrifugal guide plate 16 towards the inner ring 171 is attached.

[0135] Referring to Figure 9 and Figure 10 , since the first rotating guide plate 173 and the second rotating guide plate 174 are rotatably arranged, when the centrifugal guide plate 16 is installed, the first rotating guide plate 173 and the second rotating guide plate 174 can be rotated to be parallel and attached with one end of the centrifugal guide plate 16, which reduces the interference of the first rotating guide plate 173 and the second rotating guide plate 174 in the corresponding centrifugal separation flow channel 14 to the air flow, thereby ensuring the nitrogen-oxygen separation and enrichment effect.

[0136] In this embodiment, the two ends of the centrifugal guide plate 16 are respectively connected with the corresponding first rotating guide plate 173 and second rotating guide plate 174 through bolts.

[0137] In this embodiment, referring to Figure 9 and Figure 10 , the two outer rings 172 are coaxially connected with the panel 11 and the back plate 12 respectively, and the outer sidewall of the outer ring 172 is flush with the outer sidewall of the panel 11 and the outer sidewall of the back plate 12. In addition, one inner ring 171 is coaxially connected with the back plate 12, and the other inner ring 171 is coaxially connected with the panel 11 or is suspended. In addition, the air inlet 13 is coaxially arranged with the inner ring 171, and the inner diameter of the inner ring 171 is greater than the inner diameter of the air inlet.

[0138] In this embodiment, referring to Figure 7 and Figure 10 , the second rotating guide plate 174 is arranged close to the inner sidewall of the outer ring 172 away from the side of the corresponding centrifugal guide plate 16. This makes the second rotating guide plate 174 as close as possible to the primary separation ring 4 after the oxygen enrichment disc 1 is assembled with the secondary oxygen enrichment mechanism 200, thereby improving the sealing between the two adjacent centrifugal separation flow channels 14.

[0139] In this embodiment, the connection mode of the first rotating guide plate 173 with the inner ring 171 is the same as that of the second rotating guide plate 174 with the outer ring 172. This embodiment takes the connection mode of the first rotating guide plate 173 with the inner ring 171 as an example for description.

[0140] Referring to Figure 10 , the two inner rings 171 are provided with a plurality of rotating grooves on opposite sides, and the first rotating guide plate 173 is inserted into the corresponding rotating groove at both ends in the length direction and is rotationally connected with the inner wall of the corresponding rotating groove. The two inner rings 171 are provided with a plurality of threaded holes on opposite sides, and the threaded holes are arranged one by one corresponding to the rotating grooves, the threaded holes are coaxially communicated with the corresponding rotating grooves, and the threaded holes are inserted with bolts, and the bolts are screwed with the corresponding first rotating guide plate 173. In this connection mode, the inner ring 171 is detachably connected with the first rotating guide plate 173, and when the bolt is not locked, the first rotating guide plate 173 can rotate; when the bolt is locked, the two inner rings 171 press the first rotating guide plate 173, which can fix the first rotating guide plate 173.

[0141] In this embodiment, referring to Figure 10 , the number of rotating grooves and corresponding threaded holes on the inner ring 171 and the outer ring 172 is not less than the number of centrifugal guide plates 16, which can add a plurality of first rotating guide plates 173 between the two inner rings 171 and a plurality of second rotating guide plates 174 between the two outer rings 172, so as to freely adjust the number of centrifugal guide plates 16 in the mounting ring 17 and the width of the centrifugal separation flow channel 14 between the two adjacent centrifugal guide plates 16.

[0142] In this embodiment, referring to Figure 10, the threaded hole penetrates the corresponding panel 11 and back plate 12, which enables the bolt to be installed outside the panel 11 or back plate 12 to the corresponding inner ring 171 or outer ring 172, thereby locking the corresponding first rotating guide plate 173 or the corresponding second rotating guide plate 174; at the same time, the corresponding panel 11 or back plate 12 is locked with the mounting ring frame 17, thereby improving the stability of the oxygen enrichment disc structure.

[0143] In the embodiment, the oxygen enrichment disc 1 is taken as an example for description. Figure 9 To ensure that the number of centrifugal guide plates 16 is adjusted, each centrifugal separation flow channel 14 is in communication with at least one nitrogen-rich separation outlet 15, the length, number and distribution relationship of the nitrogen-rich separation outlet 15 can be adjusted accordingly. In actual use, a plurality of nitrogen-rich separation outlets 15 can be reserved on the back plate 12, and when these nitrogen-rich separation outlets 15 are not used, the corresponding nitrogen-rich separation outlets 15 are closed by the corresponding sealing plate, and when these nitrogen-rich separation outlets 15 are needed to be used, the corresponding sealing plates are removed. In addition, by replacing different back plates 12, it can be ensured that each centrifugal separation flow channel 14 is in communication with at least one nitrogen-rich separation outlet 15.

[0144] This ensures that after the number of centrifugal guide plates 16 is adjusted, each centrifugal separation flow channel 14 can be in communication with the corresponding nitrogen-rich separation outlet 15, thereby ensuring the normal work of the entire oxygen enrichment disc 1.

[0145] The implementation principle of the embodiment of the application is that when it is necessary to adjust the oxygen enrichment effect of the oxygen enrichment equipment, the secondary oxygen enrichment mechanism 200 and the oxygen enrichment disc 1 can be detached and separated. For the secondary oxygen enrichment mechanism 200, the number of branch plates 51 can be increased or decreased to change the number and size of the static chamber 52, thereby changing the oxygen enrichment effect of the secondary oxygen enrichment mechanism 200; for the oxygen enrichment disc 1, the number of centrifugal guide plates 16 can be increased or decreased and different structures of centrifugal guide plates 16 can be replaced, thereby adjusting the oxygen enrichment effect of the oxygen enrichment disc 1. On the one hand, this facilitates breaking the structural limitation of the oxygen enrichment equipment, so that the oxygen enrichment effect of the oxygen enrichment equipment has a larger adjustable range; on the other hand, after the subsequent improvement of the centrifugal guide plate 16, the existing oxygen enrichment disc 1 can be replaced with a new centrifugal guide plate 16, which improves the adaptability of the oxygen enrichment equipment to subsequent improvements; in addition, the secondary oxygen enrichment mechanism 200 and the oxygen enrichment disc 1 are both easy to disassemble, which facilitates the replacement and maintenance of parts, thereby reducing the subsequent maintenance cost.

[0146] The embodiments of the specific implementation are the preferred embodiments of the application, and do not limit the protection scope of the application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. An oxygen-enriching device, characterized in that, include: An oxygen-enriched disk (1) has an air inlet (13) on one side of its axial direction and several nitrogen-enriched separation outlets (15) on the other side. Several centrifugal separation channels (14) are provided inside the oxygen-enriched disk (1). The centrifugal separation channels (14) are arranged sequentially at intervals along the circumference of the air inlet (13). One end of each centrifugal separation channel (14) is connected to the air inlet (13) along its own length direction, and the other end passes through the oxygen-enriched disk (1) in a direction away from the air inlet (13). The nitrogen-enriched separation outlets (15) are arranged one-to-one with the centrifugal separation channels (14) and are connected to the corresponding centrifugal separation channels (14). The suction fan (2) is located inside the air inlet (13) and is coaxially connected to the oxygen enrichment plate (1). Centrifugal drive (3), the drive end of the centrifugal drive (3) is coaxially connected to the oxygen-enriched disk (1); The oxygen-enriched disk (1) is coaxially fitted with a primary separation ring (4), which closes the centrifugal separation channel (14). The primary separation ring (4) has a plurality of primary separation holes (41) through it, and the centrifugal separation channel (14) is connected to the corresponding primary separation holes (41); A secondary separation ring (5) is coaxially sleeved on the outside of the primary separation ring (4), and the secondary separation ring (5) is coaxially spaced from the primary separation ring (4). The secondary separation ring (5) is provided with a plurality of secondary separation holes (53); A plurality of support plates (51) are provided between the primary separation ring (4) and the secondary separation ring (5). The plurality of support plates (51) are arranged sequentially at intervals along the circumference of the primary separation ring (4), and adjacent two support plates (51) form a stationary chamber (52) at intervals. The adjacent two stationary chambers (52) are arranged independently of each other. The primary separation hole (41) and the secondary separation hole (53) are both connected to the corresponding stationary chamber (52). The secondary separation ring (5), the support plate (51) and the primary separation ring (4) are all located outside the oxygen-enriched disk (1). The secondary separation ring (5) has a back ring (202) at one end of its axial direction and a face ring (201) at the other end. The primary separation ring (4) is connected to the back ring (202) and the face ring (201) at both ends of its axial direction, respectively. The support plate (51) is connected to the back ring (202) and the face ring (201) at both ends of its length direction, respectively. The primary separation ring (4), the secondary separation ring (5), and the support plate (51) are all detachably connected to the face ring (201) and the back ring (202); The face ring (201) is provided with a plurality of first straight grooves (204), and the plurality of first straight grooves (204) are arranged sequentially at intervals along the circumference of the face ring (201); the back ring (202) is provided with a plurality of second straight grooves (205), the first straight grooves (204) and the second straight grooves (205) are arranged in a one-to-one correspondence, and the first straight grooves (204) and the corresponding second straight grooves (205) are arranged facing each other along the axial direction of the back plate (12); The number of first straight grooves (204) is not less than the number of support plates (51). There are multiple first straight grooves (204) and several support plates (51) that are set one-to-one. One end of the support plate (51) in the length direction is inserted into the corresponding first straight groove (204), and the other end is inserted into the corresponding second straight groove (205). The two ends of the support plate (51) in the width direction respectively abut against the outer wall of the primary separation ring (4) and the inner wall of the secondary separation ring (5).

2. An oxygen enrichment process for an oxygen enrichment device, used in the oxygen enrichment device described in claim 1, characterized in that, At least the following steps are included: S1. Air is drawn into the oxygen-enriched disk (1) from the air inlet (13) and sent into several centrifugal separation channels (14); S2. Drive the oxygen-enriched disk (1) to rotate to establish a centrifugal force field. Under the action of the centrifugal force field, nitrogen molecules and oxygen molecules in the air flowing in the centrifugal separation channel (14) are separated. Nitrogen molecules are enriched in the centrifugal separation channel (14) to form enriched nitrogen, and oxygen molecules are enriched in the centrifugal separation channel (14) to form enriched oxygen. S3, nitrogen-rich gas and oxygen-rich gas are discharged independently from the oxygen-rich disk (1).

3. The oxygen enrichment process of an oxygen-enriched device according to claim 2, characterized in that, Step S1 also includes the following steps: S11, Axial air intake: The intake fan (2) rotates to draw air into the air inlet (13); S12, Preliminary nitrogen and oxygen centrifugal separation and enrichment: The air intake fan (2) rotates and turns the air drawn into the air inlet (13) into a rotating airflow. Oxygen molecules in the rotating airflow are enriched in the outer layer of the rotating airflow, and nitrogen molecules are enriched in the inner layer of the rotating airflow. S13, Air delivery: The air intake fan (2) rotates to deliver the rotating airflow to several centrifugal separation channels (14).

4. The oxygen enrichment process of an oxygen-enriched device according to claim 2, characterized in that, Step S2 includes the following steps: S21, The oxygen-enriched disk (1) rotates at high speed to establish a centrifugal force field; S22. The air fed into the centrifugal separation channel (14) flows along the length of the corresponding centrifugal separation channel (14). Under the action of the centrifugal force field, nitrogen molecules and oxygen molecules in the air obtain different centrifugal speeds due to their different relative molecular masses. At different centrifugal speeds, nitrogen molecules are enriched at the end of the centrifugal separation channel (14) near the air inlet (13) to form a nitrogen-rich area containing enriched nitrogen; oxygen molecules are enriched at the end of the centrifugal separation channel (14) away from the air inlet (13) to form an oxygen-rich area containing enriched oxygen.

5. The oxygen enrichment process of an oxygen enrichment device according to claim 4, characterized in that, The following steps are included after step S22: The oxygen-enriched gas discharged from the oxygen-enriched zone corresponds to the centrifugal separation channel (14). The oxygen-enriched gas discharged from the centrifugal separation channel (14) is returned to the corresponding centrifugal separation channel (14); Under the influence of centrifugal force, nitrogen molecules in the refluxed oxygen-enriched gas are enriched in the nitrogen-enriched zone to increase the nitrogen content of the nitrogen-enriched gas, and oxygen molecules are enriched in the oxygen-enriched zone to increase the oxygen content of the oxygen-enriched gas.

6. The oxygen enrichment process of an oxygen-enriched device according to claim 4, characterized in that, The following steps are included after step S22: The oxygen-enriched disk (1) has several static chambers (52) on its outer side. The static chambers (52) have a primary separation hole (41) on one side facing the air inlet (13) and a secondary separation hole (53) on the other side. The centrifugal separation channel (14), the primary separation hole (41), the static chambers (52) and the secondary separation hole (53) are connected in sequence. The oxygen-enriched gas in the oxygen-enriched zone is discharged from the centrifugal separation channel (14) and discharged into the corresponding settling chamber (52); Under the action of centrifugal force, nitrogen molecules in the oxygen-enriched gas are enriched to the side of the settling chamber (52) near the air inlet (13) and flow back to the corresponding centrifugal separation channel (14) through the primary separation hole (41); oxygen molecules are enriched to the side of the settling chamber (52) away from the air inlet (13) and are discharged from the settling chamber (52) through the secondary separation hole (53).

7. The oxygen enrichment process of an oxygen-enriched device according to claim 2, characterized in that, In step S2, the rotational speed of the oxygen-enriched disk (1) is 3500 r / min to 4500 r / min.

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