CN114105099B - Pressure swing adsorption oxygenerator - Google Patents
Pressure swing adsorption oxygenerator Download PDFInfo
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- CN114105099B CN114105099B CN202010883564.XA CN202010883564A CN114105099B CN 114105099 B CN114105099 B CN 114105099B CN 202010883564 A CN202010883564 A CN 202010883564A CN 114105099 B CN114105099 B CN 114105099B
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- bin
- air inlet
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 103
- 239000001301 oxygen Substances 0.000 claims abstract description 56
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 56
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 238000007599 discharging Methods 0.000 claims description 15
- 239000012528 membrane Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 230000030279 gene silencing Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000010354 integration Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000012216 screening Methods 0.000 description 4
- 238000005422 blasting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000002640 oxygen therapy Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
- C01B13/0262—Physical processing only by adsorption on solids characterised by the adsorbent
- C01B13/0274—Other molecular sieve materials
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
- C01B2210/0014—Physical processing by adsorption in solids
- C01B2210/0015—Physical processing by adsorption in solids characterised by the adsorbent
- C01B2210/002—Other molecular sieve materials
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
An air inlet and nitrogen discharge control system is arranged in the upper cover, a pressure regulating valve is integrally arranged with the upper cover, and a nitrogen discharge bin and a high-pressure oxygen bin are integrally arranged between a pair of sieve barrels; the air inlet nitrogen discharge control system comprises a control circuit, a pair of piston valves, a sealing cover and a pair of electromagnetic valves, wherein the piston valves, the sealing cover and the electromagnetic valves are sequentially arranged from inside to outside in the horizontal direction, the inner side surfaces of the sealing cover are provided with a pair of piston grooves, the outer sides of the pair of piston grooves are respectively provided with a side groove, the bottom plates of the piston grooves and the side grooves are respectively provided with a side groove hole and a plug groove hole which are communicated with the electromagnetic valves, and the sealing cover is also provided with a thrust hole which is communicated with an air inlet nozzle through a channel in the sealing cover; the piston is sealed and embedded in the piston groove in an axially movable way. The integration level of the invention is further improved, and simultaneously, the double-tower switching noise is obviously reduced by changing the air flow switching process of the pressure swing adsorption type oxygen generating equipment.
Description
Technical Field
The invention relates to an oxygen generation technology, in particular to a pressure swing adsorption oxygen generator.
Background
The pressure swing adsorption oxygen production technology utilizes inexhaustible air as raw material, has low energy consumption, and the raw material acquisition and cost are superior to those of chemical oxygen production and electrolytic oxygen production, thus being the most popular oxygen production mode in the current treatment and health care use.
However, the pressure swing adsorption oxygen production is performed under the cooperation of compressed air, and the double adsorption towers are switched to operate, so that periodic explosion noise is caused by pressure difference during switching, and rest of other people is influenced, which is the most remarkable problem at present.
Disclosure of Invention
The invention aims to solve the technical problems of providing a pressure swing adsorption oxygenerator, changing the process structure of pressure swing adsorption oxygenerator, obviously reducing the periodical blasting noise, improving the product integration and reducing the cost on the premise of improving the oxygenerator quality.
The pressure swing adsorption oxygenerator, including the upper cover that has the air inlet nozzle, with terminal surface sealing connection's a pair of sieve barrel and with sieve barrel bottom sealing connection's bottom under the upper cover, its characterized in that: an air inlet and nitrogen discharge control system is arranged in the upper cover, a pressure regulating valve is integrally arranged with the upper cover, a nitrogen discharge bin and a high-pressure oxygen bin are integrally arranged between the pair of sieve barrels, and an inlet of the pressure regulating valve is communicated with the high-pressure oxygen bin;
the air inlet and nitrogen discharge control system comprises a control circuit, a pair of piston valves, a sealing cover and a pair of electromagnetic valves, wherein the piston valves, the sealing cover and the electromagnetic valves are sequentially arranged in the horizontal direction from inside to outside; an air inlet bin which is connected with the air inlet nozzle in a sealing way and a pair of sieve barrel upper cover channels which are communicated with the upper end of the sieve barrel are arranged in the upper cover;
the electromagnetic valve is a two-position three-way electromagnetic valve; the three passage ports are a valve A port, a valve B port and a valve C port respectively, the two-position state of the electromagnetic valve is that the valve A port is communicated with the valve B port only, and the valve A port is communicated with the valve C port only;
the inner side surface of the sealing cover is provided with a pair of piston grooves, the outer sides of the pair of piston grooves are provided with side grooves, the bottom surfaces of the piston grooves and the side grooves are respectively provided with a plug groove hole and a side groove hole, and the sealing cover is also provided with a thrust hole communicated with the air inlet nozzle through a channel in the sealing cover;
the piston is embedded in the piston groove in an axially movable manner in a sealing way; the valve A, the valve B and the valve C of the electromagnetic valve are respectively and hermetically communicated with the plug slot hole, the side slot hole and the thrust hole.
The upper covers of the piston valve and the connecting rod pads are respectively provided with a switching cavity, the inside of the connecting rod pressing sleeves is respectively provided with a piston cavity, and the upper cover channels of the sieve barrels, the air inlet bins and the piston cavities on the same side are mutually communicated through the switching cavities; the connecting rod pad is provided with an inner end face and an outer end face in the axial direction of the connecting rod and is used for sealing the air inlet bin, the piston cavity and the switching cavity at the inner extreme position and the outer extreme position of the connecting rod respectively; the axial extreme position of the inner end of the connecting rod enables the spring to be in a recovery state, at the moment, the spring enables the connecting rod pad to be sealed and isolated from the air inlet bin, and the piston cavity is communicated with the upper cover channel of the sieve barrel; under the action of air inlet pressure, the connecting rod is positioned at the axial extreme position of the outer end, the spring is in a stretching state, the piston cavity is sealed and isolated from the switching cavity, and the air inlet bin is communicated with the upper cover channel of the sieve barrel; a channel for communicating the piston cavity with the nitrogen discharging bin is arranged below the piston cavity, and the elastic force of the spring is smaller than the air inlet pressure.
Further, the side grooves on each side are arranged on the outer sides of the piston grooves on the same side, a piston groove side wall is arranged between the side grooves and the piston grooves, and the top of the piston groove side wall is provided with a through groove for communicating the side grooves with the piston grooves, so that the side grooves are communicated with the piston cavity through the through grooves.
The control circuit is a multivibrator for outputting square waves, the multivibrator is respectively connected with control ends of a pair of electromagnetic valves through a pair of opposite-phase output ends, phases of output signals of the pair of opposite-phase output ends are opposite, and the output duty ratio is 50% and the period is 1-5 seconds.
The bottom cover is provided with a pair of sieve barrel bases, an oxygen bin base and a nitrogen bin base which are respectively and hermetically connected with the pair of sieve barrels, the high-pressure oxygen bin and the nitrogen discharging bin, and the pair of sieve barrel bases are respectively provided with a pair of sieve barrel bottom cover channels communicated with the oxygen bin base.
Further, a pair of sieve barrel bottom cover channels are provided with a pair of oxygen inlets on the oxygen bin base, a membrane is completely covered on the pair of oxygen inlets, a pressing plate is fixedly arranged in the center of the membrane and is close to the membrane, two ends of the membrane are free ends, one side of the free ends corresponding to the oxygen inlets under the pressure of the output gas of the oxygen inlets on any side below is opened, and one end of the oxygen inlet corresponding to one side is closed when no pressure exists.
As an embodiment, the nitrogen discharging bin is provided with a nitrogen discharging port communicated with the atmosphere, and the inner side of the nitrogen discharging port is provided with a silencing filler.
The integration level of the oxygenerator is further improved, and meanwhile, the double-tower switching noise is remarkably reduced by changing the air flow switching process of the pressure swing adsorption type oxygenerator.
The invention optimizes the integral structure of the upper cover of the adsorption tower, discloses a novel and specific nitrogen-discharging and silencing structure, changes the release of compressed gas in a piston groove into the discharge of the compressed gas from an internal channel to a nitrogen-discharging bin, reduces the switching noise of a double tower for pressure swing adsorption oxygen production from 70 dB to below 50 dB, improves the oxygen production purity from 92% to stable output 95%, simplifies the integral structure as a low-power oxygen generator, integrates a pressure regulating valve into a whole, further reduces the volume, and simplifies the assembly process flow.
Drawings
Figure 1 is an exploded view of the overall structure of the present invention,
figure 2 is an enlarged view of the internal structural view of the closure,
figure 3 is an enlarged view of section A-A of figure 1,
figure 4 is an enlarged view of figure 3 at D,
fig. 5 is an enlarged view of section B-B of fig. 1.
In the figure: 1-air inlet nozzle, 2-upper cover, 3-spring, 4-connecting rod pad, 5-connecting rod, 6-connecting rod pressing sleeve, 7-piston, 8-piston ring, 9-sealing cover, 10-electromagnetic valve, 11-screening barrel, 12-sealing pad, 13-pressing plate, 14-bottom cover, 15-diaphragm, 16-screening barrel bottom cover channel, 17-nitrogen discharging bin, 18-screening barrel upper cover channel, 19-air inlet bin, 20-side slot, 21-through slot, 22-piston slot, 23-pressure regulating valve, 24-high pressure oxygen bin, 25-piston valve, 27-side slot hole, 28-plug slot hole, 29-thrust hole, 30-valve A mouth, 31-valve B mouth, 32-valve C mouth, 33-piston cavity, 34-switching cavity, 35-screening barrel base, 36-oxygen bin base, 37-nitrogen bin base and 38-oxygen inlet.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings: the pressure swing adsorption oxygenerator shown in fig. 1 comprises an upper cover 2 with an air inlet nozzle 1, a pair of sieve barrels 11 in sealing connection with the lower end surface of the upper cover and a bottom cover 14 in sealing connection with the bottom end of the sieve barrels. The upper cover 2 is internally integrated with an air inlet and nitrogen discharge control system, the air inlet and nitrogen discharge control system and the upper cover 2 are integrally provided with a pressure regulating valve 23, the sieve barrels 11 are filled with molecular sieve stones, a nitrogen discharge bin 17 and a high-pressure oxygen bin 24 are arranged between a pair of sieve barrels 1 in a side-by-side and airtight mode, the inlet of the pressure regulating valve 23 is communicated with the high-pressure oxygen bin 24, and oxygen separated from the sieve barrels can be output through the pressure regulating valve 23 after entering the high-pressure oxygen bin 24. The bottom end of the nitrogen discharging bin 17 is communicated with the atmosphere, the air inlet nozzle 1 is used for being connected with the output end of the air compressor, and other parts are sealed.
As can be seen from FIG. 1, the whole control system is almost integrated in the upper cover of the adsorption tower, the original complex double-valve-rod control element is also transversely arranged in the upper cover of the adsorption tower after being integrated and simplified, and the extra space is enough for arranging a pressure regulating valve, so that the adsorption tower can be operated only by externally connecting a miniature air compressor during use, and the adsorption tower is more convenient to use.
As shown in fig. 1 and 3, the air intake and nitrogen discharge control system is arranged in the upper cover 2, and if a pair of vertical sieve barrels 11 are arranged transversely, a pair of piston valves 25, a sealing cover 9 and a pair of electromagnetic valves 10 are arranged horizontally and longitudinally from inside to outside in sequence.
The piston valve 25 is arranged in the cavity of the upper cover 2, and is sequentially provided with a spring 3, a connecting rod 5 with a connecting rod pad 4, a connecting rod pressing sleeve 6 sleeved at the outer end part of the connecting rod and a piston 7 with a piston ring 8 at the outer end. The inner end of the spring 3 is fixed with the inner wall of the cavity, the outer end of the spring 3 is fixed with the inner end of the connecting rod 5, the spring 3 plays a role in keeping the connecting rod 5 contracted when the spring is not controlled by air pressure, the connecting rod 5 contracts to keep a stable state of the piston valve 25, the connecting rod 5 completes the switching of the inner position and the outer position of the piston valve 25 under the action of the spring 3 and the air pressure, and the two positions of each piston valve 25 correspond to two working states of air inlet and nitrogen discharge of the sieve barrel.
As shown in fig. 3 and 4, an air inlet bin 19 which is in sealing connection with the air inlet nozzle 1 and a pair of sieve barrel upper cover channels 18 which are communicated with the upper end of the sieve barrel 11 are arranged in the upper cover 2. The air inlet bin 19 where the pair of piston valves 25 are located is communicated, the upper cover 2 is respectively provided with a switching cavity 34 at the connecting rod pad 4 of the pair of connecting rods 5, the connecting rod pressing sleeve 6 of the pair of connecting rods 5 is respectively provided with a piston cavity 33, and the sieve barrel upper cover channels 18, the air inlet bin 19 and the piston cavities 33 on the same side are all required to be communicated with each other through the switching cavities 34. As can be seen in fig. 3, the switching chamber 34 is located at the intersection of the inlet chamber 19, the piston chamber 33 and the sieve bowl upper cover passage 18. The air inlet bin 19 and the piston cavity 33 at two ends of the switching cavity 34 are respectively provided with sealing ports, the connecting rod pad 4 is provided with front and rear end surfaces, the piston cavity 33 and the air inlet bin 19 are respectively blocked by the connecting rod pad 4 in two states of air inlet and nitrogen discharge of the piston valve 25, the piston cavity 33 and the air inlet bin 19 are respectively isolated from the sieve barrel upper cover channel 18 in two states of air inlet and nitrogen discharge of the piston valve 25, and a nitrogen discharge channel is arranged vertically below the piston cavity 33. In fig. 3 and 4, the right upper cover channel 18 of the sieve barrel is in an air inlet state, compressed air enters the upper cover channel 18 of the sieve barrel from the air inlet bin 19, and then enters the sieve barrel from the upper cover channel 18 of the sieve barrel; the left side is in a nitrogen discharge state, and the gas rich in nitrogen above the sieve barrel enters the piston valve 25 through the sieve barrel upper cover channel 18 and then enters the nitrogen discharge bin 17 through the piston valve 25.
In the air intake state, the piston cavity 33 is blocked, and compressed air entering from the air intake bin 19 enters the sieve barrel 11 through the switching cavity 34 and the sieve barrel upper cover channel 18, so that only air can be taken in, and nitrogen cannot be discharged; in the nitrogen discharge state, the air inlet bin 19 is blocked, and nitrogen above the sieve barrel enters the piston cavity 33 through the sieve barrel upper cover channel 18 and the switching cavity 34, so that the nitrogen is discharged to the atmosphere from the nitrogen discharge bin below the piston cavity 33.
The pair of electromagnetic valves 10 are two-position three-way electromagnetic valves; the three passage ports of the two-position three-way electromagnetic valve are respectively a valve A port 30, a valve B port 31 and a valve C port 32, the two-position states of the electromagnetic valve are respectively that the valve A port 30 is communicated with the valve B port 31 only, and the valve A port 30 is communicated with the valve C port 32 only. The electromagnetic valves 10 are respectively arranged corresponding to the left piston valve and the right piston valve, the electromagnetic valves 10 are controlled by a control circuit, the control circuit is a simple multivibrator for outputting square waves, and a common 555 integrated chip can be built. The multivibrator is connected with the control ends of the electromagnetic valves 10 through a pair of opposite phase output ends respectively, the phases of the output signals of the pair of output ends are opposite, the 50% duty ratio is output, the period is 1-5 seconds, and the periodic switching of the two states of the piston valve is controlled.
As shown in fig. 2 and 3, the cover 9 plays an important role in switching the state and eliminating noise. The inner side surface of the sealing cover 9 is provided with a pair of piston grooves 22, the outer sides of the pair of piston grooves 22 are provided with side grooves 20, the bottom surfaces of the piston grooves 22 and the side grooves 20 are respectively provided with a plug groove hole 28 and a side groove hole 27 which penetrate through the bottom plate, and the sealing cover 9 is also provided with a thrust hole 29 which is communicated with the air inlet nozzle 1 through a channel in the sealing cover.
The piston 7 is embedded in the piston groove 22 in an axially movable manner, the outer end part of the piston 7 is provided with a piston ring 8, the piston ring 8 is sealed with the inner side wall of the piston groove 22, and when a plug groove hole 28 at the bottom of the piston groove 22 is blocked by an electromagnetic valve, the piston 7 cannot axially move. The valve A port 30, the valve B port 31 and the valve C port 32 of the solenoid valve 10 are respectively in sealing communication with the plug hole 28, the side hole 27 and the thrust hole 29. The thrust hole 29 is communicated with the air inlet nozzle 1 through a channel in the upper cover, the side groove 20 on each side is arranged outside the piston groove 22 on the same side, a piston groove side wall is arranged between the side groove 20 and the piston groove 22, and the top of the piston groove side wall is provided with a through groove 21 for communicating the side groove 20 with the piston groove 22, so that the side groove 20 is communicated with the piston cavity 33 through the through groove 21. Naming the two-position state of the solenoid: the valve a port 30 communicates with only the valve B port 31 to be in a deflated state of the piston groove 22, and the valve a port 30 communicates with only the valve C port 32 to be in an inflated state of the piston groove 22. When the piston groove 22 is in an air state, and the piston groove 22 is in air inlet, compressed air enters the piston groove 22 through the thrust hole 29, the valve C port 32 and the valve A port 30, so that the connecting rod 5 releases air pressure control and retracts under the action of the spring 3; in the case of the bleed, referring to fig. 2 and 4, the gas sealed in the piston groove 22 is discharged from the closed internal passage instead of directly discharged from the solenoid valve through the valve a port 30-valve B port 31-side groove hole 27-side groove 20-through groove 21-piston chamber 33 (the connecting rod press sleeve 6 is cylindrical hollow) -nitrogen discharge chamber 17, and the bleed noise is completely shielded. The two states of the electromagnetic valve determine the bidirectional movement or stop of the connecting rod on one hand and the built-in channel reduces the noise during the nitrogen discharge switching on the other hand by matching with the air discharge and air intake of the piston groove.
The spring 3 is in a recovery state due to the retraction position of the connecting rod 5, the tension of the spring 3 enables the connecting rod pad 4 to seal and isolate the air inlet bin 19, the piston cavity 33 is communicated with the sieve barrel upper cover channel 18, and sieve barrel nitrogen enters the nitrogen discharge bin 17 through the piston cavity 33; the overhanging position of the connecting rod 5 enables the spring 3 to be in a stretching state, the elastic force of the spring 3 is set to be smaller than the air inlet pressure, at the moment, the air inlet pressure enables the piston cavity 33 to be sealed and isolated, the air inlet bin 19 is communicated with the sieve barrel upper cover channel 18, and compressed air enters the sieve barrel through the sieve barrel upper cover channel 18 to manufacture oxygen. Therefore, the arrangement of the sealing plate plays a key role in the control process by matching with the electromagnetic valve.
As shown in fig. 1, the bottom cover 14 is provided with a pair of sieve barrel base 35, an oxygen bin base 36 and a nitrogen bin base 37 which are respectively and hermetically connected with the pair of sieve barrels 11, the hyperbaric oxygen bin 24 and the nitrogen discharge bin 17 through the sealing gasket 12, and the pair of sieve barrel base 35 is respectively provided with a pair of sieve barrel bottom cover channels 16 communicated with the oxygen bin base 36. The pair of sieve barrel bottom cover channels 16 are provided with a pair of oxygen inlets 38 on the oxygen bin base 36, the pair of oxygen inlets 38 are completely covered with a membrane 15, the middle of the membrane is fixedly provided with a pressing plate 13 which is closely adjacent to the membrane 15, so that two ends of the membrane are free ends, the free ends of the membrane at the corresponding side under the pressure of the gas output by the oxygen inlet 38 at any side below are opened, and one end of the corresponding oxygen inlet is closed when no pressure exists.
With the above structure, it is possible to know the dynamic operation process of the oxygen machine, and the screen barrels on the left and right sides are alternately controlled by a pair of solenoid valves 10 driven by the reverse phase signals to perform air intake and nitrogen discharge. The solenoid valve shown in fig. 3 is connected to the left side piston groove, and the other solenoid valve shown in fig. 5 is connected to the right side piston groove, during operation of the oxygenerator:
referring to fig. 3 and 4, the left solenoid valve is operated in the pneumatic state of the piston groove, the left connecting rod is operated in the nitrogen-discharging state, the valve C opening 32 of the left solenoid valve is communicated with the thrust hole 29 of the sealing cover 9, when the left piston groove is in air intake, the valve C opening 32 of the left solenoid valve is communicated with the valve a opening 30, the valve B opening 31 of the left solenoid valve in the left piston groove is closed, compressed air enters the left piston groove 22 through the thrust hole 29, the pressure of two ends of the left connecting rod 5 is balanced, the left connecting rod is retracted under the restoring force of the spring 3, the left connecting rod pad 4 at the outer end of the left connecting rod is opened to communicate with the left sieve barrel, the left sieve barrel is in nitrogen discharge, the connecting rod pad 4 at the inner end of the left side is closed to the left air intake bin 19, the upper layer nitrogen-rich gas pressure in the sieve barrel enters the nitrogen discharge bin through the sealing gasket, and is released from the air discharge outlet through the nitrogen discharge bin, and the nitrogen discharge path C in fig. 3 and 4 is referred to. In the initial stage of switching the solenoid valve to the air release state, the valve a port 30 communicates with the valve B port 31, the compressed air in the left piston groove 22 is quickly released, the release noise is shielded in the passage, and the path B in fig. 3 and 4 is released.
The left solenoid valve is operated in the de-aerated state of the right solenoid valve driven by the inverted signal by a symmetrical system on the right side, as shown in fig. 5, while the left piston slot 22 is being energized.
The valve A port 30 of the right electromagnetic valve is only communicated with the valve B port 31, the right electromagnetic valve works in a deflation state of the piston groove, the right piston rod moves downwards while deflating, and the right sieve barrel enters an air inlet state. At this time, the electromagnetic valve thrust hole 29 of the right piston groove is blocked, see the right electromagnetic valve of fig. 5, the gas in the right piston groove passes through the valve port 30 of the right electromagnetic valve, the valve port 31, the right side groove 20, the right side through the right through groove 21, the middle part of the right hollow piston ring 8 enters the right piston cavity 33, and then enters the nitrogen discharging bin 17, the noise generated by the release of the compressed gas in the piston cavity 33 is completely enclosed in the channel, and the blasting noise generated by the release is greatly reduced. As in fig. 5, the exhaust path b is indicated, and the exhaust path b in fig. 3, the exhaust path at the instant when the solenoid valve is switched to the air release state, is indicated. Because of the inconsistent viewing planes on the space curved surface structures in fig. 3 and 5, the air path needs to be in the state of the left connecting rod in fig. 3. At this time, as the right piston groove is deflated, the air pressure in the piston groove is reduced, the right connecting rod is extended under the air pressure of the air inlet bin at the inner end, the port from the air inlet bin 19 at the right side to the switching cavity 34 is opened, as indicated by the air inlet path a in fig. 3, the air inlet bin 19 is communicated with the upper cover channel 18 of the screen barrel at the right side, compressed air enters the screen barrel 11 at the right side, new compressed air enters the screen barrel at the right side and passes through the screen stones in the screen barrel to separate out oxygen, high-pressure oxygen pushes up the right membrane 15 at the bottom of the high-pressure oxygen bin 24 from the bottom cover channel 16 of the screen barrel at the right side, enters the high-pressure oxygen bin 24, and oxygen gas flow in use is output through the pressure reducing valve 23 above the high-pressure oxygen bin.
The whole control movement is completed only by means of switching two states of the electromagnetic valve, the whole operation logic is complete, the structure of the sealing plate plays a key role, the control design of the three-position two-way electromagnetic valve is ingenious, the whole integration level is high, the whole structure is further simplified, and the assembly process is simplified; therefore, the use is more convenient, and the oxygen therapy tube can be connected for use.
Claims (7)
1. The utility model provides a pressure swing adsorption oxygenerator, includes upper cover (2) that have air inlet nozzle (1), with a pair of sieve barrel (11) of terminal surface sealing connection under the upper cover and with sieve barrel bottom sealing connection's bottom (14), its characterized in that: an air inlet nitrogen removal control system is arranged in the upper cover (2), a pressure regulating valve (23) is integrally arranged with the upper cover (2), a nitrogen removal bin (17) and a high-pressure oxygen bin (24) are integrally arranged between the pair of sieve barrels (11), and an inlet of the pressure regulating valve (23) is communicated with the high-pressure oxygen bin (24);
the air inlet and nitrogen discharge control system comprises a control circuit, a pair of piston valves (25), a sealing cover (9) and a pair of electromagnetic valves (10) which are sequentially arranged from inside to outside in the horizontal direction, wherein the piston valves (25) are arranged in a cavity of the upper cover (2), and are sequentially provided with a spring (3), a connecting rod (5) with a connecting rod pad (4), a connecting rod pressing sleeve (6) sleeved at the outer end part of the connecting rod and a piston (7) with a piston ring (8) at the outer end; an air inlet bin (19) which is connected with the air inlet nozzle (1) in a sealing way and a pair of sieve barrel upper cover channels (18) which are communicated with the upper end of the sieve barrel (11) are arranged in the upper cover (2);
the electromagnetic valve (10) is a two-position three-way electromagnetic valve; the three passage ports are a valve A port (30), a valve B port (31) and a valve C port (32) respectively, and the two states of the electromagnetic valve are that the valve A port (30) is communicated with the valve B port (31) only and the valve A port (30) is communicated with the valve C port (32) only;
the inner side surface of the sealing cover (9) is provided with a pair of piston grooves (22), the outer sides of the pair of piston grooves (22) are provided with side grooves (20), the bottom surfaces of the piston grooves (22) and the side grooves (20) are respectively provided with a plug groove hole (28) and a side groove hole (27), and the sealing cover (9) is also provided with a thrust hole (29) communicated with the air inlet nozzle (1) through a channel in the sealing cover;
the piston (7) is embedded in the piston groove (22) in an axially movable and sealing way; a valve A port (30), a valve B port (31) and a valve C port (32) of the electromagnetic valve (10) are respectively and hermetically communicated with the plug slot hole (28), the side slot hole (27) and the thrust hole (29).
2. The pressure swing adsorption oxygenerator of claim 1, wherein: the air inlet bin (19) where the pair of piston valves (25) are positioned is communicated, the upper covers (2) at the pair of connecting rod pads (4) of the piston valves (25) are respectively provided with a switching cavity (34), the inside of the pair of connecting rod pressing sleeves (6) are respectively provided with a piston cavity (33), and the upper cover channels (18) of the sieve barrels, the air inlet bin (19) and the piston cavities (33) at the same side are mutually communicated through the switching cavities (34); the connecting rod pad (4) is provided with an inner end face and an outer end face in the axial direction of the connecting rod, and is used for sealing an air inlet bin (19), a piston cavity (33) and a switching cavity (34) at the inner extreme position and the outer extreme position of the connecting rod (5) respectively; the axial extreme position of the inner end of the connecting rod (5) enables the spring (3) to be in a recovery state, at the moment, the spring (3) enables the connecting rod pad (4) to be sealed and isolated from the air inlet bin (19), and the piston cavity (33) is communicated with the sieve barrel upper cover channel (18); the connecting rod (5) is positioned at the axial extreme position of the outer end under the action of air inlet pressure, the spring (3) is in a stretching state, the piston cavity (33) is sealed and isolated from the switching cavity (34), and the air inlet bin (19) is communicated with the sieve barrel upper cover channel (18); a passage for communicating the piston cavity (33) with the nitrogen discharging bin (17) is arranged below the piston cavity (33), and the elastic force of the spring (3) is smaller than the air inlet pressure.
3. The pressure swing adsorption oxygenerator of claim 2, wherein: the side grooves (20) on each side are arranged on the outer sides of the piston grooves (22) on the same side, a piston groove side wall is arranged between the side grooves (20) and the piston grooves (22), and a through groove (21) for communicating the side grooves (20) with the piston grooves (22) is arranged at the top of the piston groove side wall, so that the side grooves (20) are communicated with the piston cavity (33) through the through groove (21).
4. The pressure swing adsorption oxygenerator of claim 1, wherein: the control circuit is a multivibrator for outputting square waves, the multivibrator is respectively connected with the control ends of a pair of electromagnetic valves (10) through a pair of opposite phase output ends, the phases of output signals of the pair of opposite phase output ends are opposite, and the output duty ratio is 50%, and the period is 1-5 seconds.
5. The pressure swing adsorption oxygenerator of claim 1, wherein: the bottom cover (14) is provided with a pair of sieve barrel bases (35), an oxygen bin base (36) and a nitrogen bin base (37) which are respectively connected with the pair of sieve barrels (11), the high-pressure oxygen bin (24) and the nitrogen discharge bin (17) in a sealing mode, and the pair of sieve barrel bases (35) are respectively provided with a pair of sieve barrel bottom cover channels (16) communicated with the oxygen bin base (36).
6. The pressure swing adsorption oxygenerator of claim 5, wherein: the pair of sieve barrel bottom cover channels (16) are provided with a pair of oxygen inlets (38) on the oxygen bin base (36), the pair of oxygen inlets (38) are completely covered with a membrane (15), the membrane (15) is closely adjacent, and a pressing plate (13) is fixedly arranged in the center of the membrane, so that two ends of the membrane are free ends, one side of the free ends corresponding to the oxygen inlets under the pressure of gas output by the oxygen inlets (38) on any side below are opened, and one end of the oxygen inlet corresponding to one side is closed when no pressure exists.
7. The pressure swing adsorption oxygenerator of claim 1, wherein: the nitrogen discharging bin (17) is provided with a nitrogen discharging port communicated with the atmosphere, and the inner side of the nitrogen discharging port is provided with a silencing filler.
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| CN2409197Y (en) * | 1999-10-21 | 2000-12-06 | 山西埃尔医用氧设备有限公司 | Medical molecular sieve pressure change adsorption oxygenerator |
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| CN204569415U (en) * | 2015-06-11 | 2015-08-19 | 武汉海纳川科技有限公司 | A kind of absorption tower of oxygen erator upper cover air inlet and denitrogen control system integration structure |
| CN109613859A (en) * | 2018-12-06 | 2019-04-12 | 深圳市德达康健股份有限公司 | A kind of molecular-sieve oxygen generator and its control system, method |
| CN212450623U (en) * | 2020-08-28 | 2021-02-02 | 武汉美氧科技有限公司 | Pressure swing adsorption oxygenerator |
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2020
- 2020-08-28 CN CN202010883564.XA patent/CN114105099B/en active Active
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| CN2409197Y (en) * | 1999-10-21 | 2000-12-06 | 山西埃尔医用氧设备有限公司 | Medical molecular sieve pressure change adsorption oxygenerator |
| JP2007119326A (en) * | 2005-10-31 | 2007-05-17 | Kanto Gakuin | Purification apparatus for generating argon-free high concentration oxygen |
| KR20110047617A (en) * | 2009-10-30 | 2011-05-09 | (주)옥시큐 | Pure oxygen generator |
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| CN114105099A (en) | 2022-03-01 |
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