CN107117583B - Oxygen generator with gas feedback protection and method for protecting molecular sieve by gas feedback - Google Patents
Oxygen generator with gas feedback protection and method for protecting molecular sieve by gas feedback Download PDFInfo
- Publication number
- CN107117583B CN107117583B CN201610104070.0A CN201610104070A CN107117583B CN 107117583 B CN107117583 B CN 107117583B CN 201610104070 A CN201610104070 A CN 201610104070A CN 107117583 B CN107117583 B CN 107117583B
- Authority
- CN
- China
- Prior art keywords
- molecular sieve
- oxygen
- storage tank
- oxygen storage
- sieve tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Gases By Adsorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
The invention discloses an oxygen generator with gas feedback protection, which comprises a compressor, a molecular sieve tower, a first oxygen storage tank, a second oxygen storage tank, a third branch point, a fourth branch point, a first check valve, a third valve body and a fourth valve body, wherein the compressor is communicated with the molecular sieve tower through a first channel, the molecular sieve tower is communicated with the first oxygen storage tank through a second channel, the second oxygen storage tank is communicated with the second branch point through a third channel, the second oxygen storage tank is communicated with the first branch point through a fourth channel, the first check valve is arranged between an outlet of the compressor and the first branch point, the third valve body is arranged on the third channel, and the fourth valve body is arranged on the fourth channel. The invention also discloses a method for protecting the molecular sieve by gas feedback, which protects the molecular sieve by feeding back oxygen. The invention does not need external intervention, but is carried out by internal circulation, is simple and reliable, and the generation and the reverse transportation of the drying oxygen are consistent with the working and the stop rhythm of the molecular sieve tower, thereby ensuring the reliability and the long-term effectiveness of the drying.
Description
Technical Field
The invention relates to an oxygen generator, in particular to a method and a structure for protecting a molecular sieve in an oxygen generator by adopting a gas feedback mode.
Background
At present, in a small-sized oxygen generator on the market, during the use intermittence period, the molecular sieve in the molecular sieve tower is influenced by the water vapor in the input air, and the service life of the molecular sieve is greatly shortened. Improvements are needed.
In order to solve the problem of water absorption and cracking of the molecular sieve, the prior art is to install a moisture absorbent at the front end of a molecular sieve tower for damp-proof treatment. However, after a period of operation, the moisture absorbent will become saturated and ineffective and not effective for a long period of time.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an oxygen generator with gas feedback protection and a method for protecting a molecular sieve by gas feedback, wherein the oxygen generator is simple and reliable and can effectively protect the molecular sieve in the oxygen generator for a long time.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to one aspect of the invention, an oxygen generator with gas feedback protection is provided, which comprises a compressor, a molecular sieve tower and a first oxygen storage tank, wherein the compressor is communicated with the molecular sieve tower through a first channel, the molecular sieve tower is communicated with the first oxygen storage tank through a second channel, the oxygen generator further comprises a second oxygen storage tank, the first channel comprises a first branch point, the second channel comprises a second branch point, the second oxygen storage tank is communicated with the second branch point through a third channel, the second oxygen storage tank is communicated with the first branch point through a fourth channel, a first one-way valve is arranged between an outlet of the compressor and the first branch point, a third valve body is arranged on the third channel, a fourth valve body is arranged on the fourth channel, and the third valve body controls the outlet gas of the molecular sieve tower to enter the second oxygen storage tank, and the fourth valve body controls the gas of the second oxygen storage tank to enter the molecular sieve tower.
According to an embodiment of the present invention, the third valve is a one-way valve, and controls the outlet gas in the molecular sieve column to enter the second oxygen storage tank.
According to an embodiment of the present invention, the fourth valve body is a one-way valve, and controls gas in the second oxygen storage tank to enter the molecular sieve tower.
According to an embodiment of the present invention, the fourth valve body is an electromagnetic valve, and controls gas in the second oxygen storage tank to enter the molecular sieve tower.
According to an embodiment of the present invention, the solenoid valve is a normally closed two-position three-way solenoid valve.
According to an embodiment of the present invention, the third valve body is an electromagnetic valve, and controls the outlet gas in the molecular sieve tower to enter the second oxygen storage tank.
According to an embodiment of the present invention, the solenoid valve is a normally closed two-position three-way solenoid valve.
According to an embodiment of the present invention, a throttle valve is further disposed on the third passage between the second oxygen tank and the solenoid valve.
According to an embodiment of the present invention, the fourth valve body is an electromagnetic valve, and controls gas in the second oxygen storage tank to enter the molecular sieve tower.
According to an embodiment of the present invention, the fourth valve body is a one-way valve, and controls gas in the second oxygen storage tank to enter the molecular sieve tower.
According to an embodiment of the present invention, the solenoid valve is a normally closed two-position three-way solenoid valve.
According to an embodiment of the invention, the second oxygen tank has a volume greater than the volume of the molecular sieve column.
In order to achieve the purpose, the invention also adopts the following technical scheme:
according to another aspect of the present invention, there is provided a method for protecting a molecular sieve by gas feedback, comprising the steps of:
inputting compressed air into the molecular sieve tower through a compressor;
the molecular sieve tower works, and dry oxygen is input into the first oxygen storage tank and the second oxygen storage tank;
the molecular sieve tower stops working and exhausts air;
and the dry oxygen stored in the second oxygen storage tank enters the molecular sieve tower.
According to an embodiment of the present invention, the molecular sieve column operates while dry oxygen is simultaneously supplied to the first oxygen storage tank and the second oxygen storage tank.
According to an embodiment of the present invention, when the molecular sieve column operates, dry oxygen is first introduced into the first oxygen storage tank, and after the oxygen pressure in the first oxygen storage tank reaches a set value, dry oxygen is introduced into the second oxygen storage tank.
According to an embodiment of the invention, the pressure in the second oxygen tank is lower than the outlet pressure of the compressor when operating.
According to the technical scheme, the beneficial effects of the invention are as follows:
the invention directly utilizes the self-produced dry oxygen to reversely convey the dry oxygen to the molecular sieve tower when the molecular sieve tower stops working, and the molecular sieve tower is dried and protected. The invention does not need external intervention, but is carried out by internal circulation, is simple and reliable, and the generation and the reverse transportation of the drying oxygen are consistent with the working and the stop rhythm of the molecular sieve tower, thereby ensuring the reliability and the long-term effectiveness of the drying.
The above and other objects, features and advantages of the present invention will become more apparent from the following description of preferred embodiments of the present invention with reference to the accompanying drawings.
Drawings
Various objects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:
FIG. 1 is a schematic diagram of the structure of a first embodiment of the oxygen generator with gas feedback protection of the present invention;
FIG. 2 is a schematic diagram of the structure of a second embodiment of the oxygen generator with gas feedback protection of the present invention;
FIG. 3 is a schematic diagram of the structure of a third embodiment of the oxygen generator with gas feedback protection of the present invention;
fig. 4 is a schematic structural diagram of a fourth embodiment of the oxygen generator with gas feedback protection of the invention.
The figures are labeled as follows: the system comprises a compressor 1, a molecular sieve tower 2, a first oxygen storage tank 3, a second oxygen storage tank 4, a first channel 5, a second channel 6, a third channel 7, a fourth channel 8, a first branch point 9, a second branch point 10, an air filter 11, a first side tower 21, a second side tower 22, an exhaust silencer 23, a sieve tower electromagnetic valve 24, a pressure sensor 31, a pressure regulating valve 32, a filter 33, a float flowmeter 34, an outlet one-way valve 35, a concentration sensor 36, a first one-way valve 51, a second one-way valve 61, a third one-way valve 71/72, an inlet electromagnetic valve 73/75, an inlet throttle valve 74/76, a fourth one-way valve 81/84 and an outlet electromagnetic valve 82/83.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
In the following description of various examples of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "top," "bottom," "front," "back," "side," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of the invention.
First embodiment
Fig. 1 is a schematic structural diagram of a first embodiment of the oxygen generator with gas feedback protection of the present invention, as shown in fig. 1. In this embodiment, an air filter 11 is connected to an inlet of the compressor 1, an outlet of the compressor is communicated with the first passage 5, a first check valve 51 is disposed on the first passage 5, the compressor 1 inputs compressed air into the molecular sieve column 2 through the first passage 5, and the first check valve 51 prevents reverse input of gas into the compressor 1. In addition, a first branch point 9 is provided on the first channel to communicate with the other channels.
In this embodiment, the molecular sieve column 2 includes a first side column 21 and a second side column 22, and the first side column 21 and the second side column 22 are arranged in parallel and communicate the first passage 5 and the exhaust muffler 23 through a sieve column solenoid valve 24. When the first side column 21 is pressurized, the second side column 22 is decompressed and analyzed, and when the pressure is lowered, nitrogen gas adsorbed by the molecular sieve is released and discharged to the atmosphere through the exhaust muffler 23 to prepare for the next nitrogen gas adsorption.
In this embodiment, one end of the second channel 6 is communicated with the oxygen outlet of the molecular sieve tower 2, and the other end is communicated with the inlet of the first oxygen storage tank 3. A second check valve 61 is provided on the second passage 6 to prevent the oxygen in the first oxygen storage tank 3 from flowing backward to the molecular sieve column 2. In addition, a second branch point 10 is provided in the second passage 6 to communicate with the other passages. In this embodiment, the first oxygen tank 3 is provided with a pressure sensor 31 to measure the pressure of oxygen in the first oxygen tank 3. A pressure regulating valve 32, a filter 33, a float flow meter 34, an outlet check valve 35 and a concentration sensor 36 are provided in this order in communication with the outlet passage of the first oxygen tank 3 to output oxygen gas suitable for human use.
In the embodiment, the third channel 7 is communicated with the second branch point 10, the fourth channel 8 is communicated with the first branch point 9, the inlet of the second oxygen storage tank 4 is communicated with the third channel 7, and the outlet is communicated with the fourth channel 8. In this embodiment, the third channel 7 is provided with a third one-way valve 71, and the fourth channel 8 is provided with a fourth one-way valve 81, so as to ensure that the direction of the second oxygen tank 4 is correct.
In this embodiment, the volume of the second oxygen tank 4 is greater than the volume of the molecular sieve column 2, and may be up to four times or more. In addition, the oxygen pressure in the second oxygen storage tank 4 is 110-170kpa, the humidity of the compressed air input into the molecular sieve tower 2 by the compressor 1 is 30% RH-90% RH, and the relative humidity of the oxygen generated by the molecular sieve tower is less than 10% RH. Also, the third check valve 71 and the fourth check valve 81 are opened at an operating pressure of less than 5 kPa.
The working process of this embodiment is as follows:
1. the power supply is turned on, the compressor 1 works to pressurize and compress the outside air, and the compressed air is introduced into the molecular sieve tower 2 through the control of the sieve tower electromagnetic valve 24.
2. Along with the continuous entering of compressed air, the gas pressure in the molecular sieve tower 2 rises, and under high pressure, the molecular sieve can adsorb nitrogen molecules in the air, and oxygen molecules flow through the molecular sieve tower 2 and enter the first oxygen storage tank 3 through the second one-way valve 61.
3. Under the control of the sieve electromagnetic valve 24, when the first side column 21 is pressurized, the second side column 22 is decompressed and analyzed, and when the pressure is reduced, nitrogen gas adsorbed by the molecular sieve is released and discharged to the atmosphere through the exhaust muffler 23 to prepare for the next nitrogen gas adsorption.
4. During the continuous process of pressure adsorption and pressure reduction desorption in the molecular sieve column 2, high-concentration oxygen is continuously injected into the first oxygen storage tank 3. The oxygen in the first oxygen storage tank 3 is subjected to pressure reduction and pressure regulation by the pressure regulating valve, passes through the filter 33, and is output by a pipeline for people to use.
5. During the continuous process of pressure adsorption and pressure reduction desorption in the molecular sieve column 2, the generated oxygen will also flow to the second oxygen storage tank 4, and the oxygen pressure in the second oxygen storage tank 4 will be kept to be changed between 110-. The pressure of the dry oxygen flowing into the second oxygen tank 4 will rise continuously and eventually will remain the same as the highest pressure of oxygen in the first oxygen tank 3. But will be below the discharge compressed air pressure of the compressor 1.
6. After a customer presses a stop button, the compressor 1 stops working, and the sieve tower electromagnetic valve 24 performs switching actions for 2-4 times, so that high-pressure air in the molecular sieve tower 2 is discharged. When the pressure of the oxygen in the second oxygen tank 4 is greater than the pressure of the compressed air in the fourth passage 8, the dry oxygen in the second oxygen tank 4 flows into the molecular sieve column 2 through the fourth check valve 81.
In this embodiment, the air in the molecular sieve column 2 is discharged through the above process, and dry oxygen is introduced. The molecular sieve can be kept in a dry gas environment during the intermittent period of the operation of the machine, and the molecular sieve is prevented from absorbing moisture and agglomerating. The service life of the whole machine is prolonged.
Second embodiment
Fig. 2 is a schematic structural diagram of a second embodiment of the oxygen generator with gas feedback protection of the present invention, as shown in fig. 2. In this embodiment, an air filter 11 is connected to an inlet of the compressor 1, an outlet of the compressor is communicated with the first passage 5, a first check valve 51 is disposed on the first passage 5, the compressor 1 inputs compressed air into the molecular sieve column 2 through the first passage 5, and the first check valve 51 prevents reverse input of gas into the compressor 1. In addition, a first branch point 9 is provided on the first channel to communicate with the other channels.
In this embodiment, the molecular sieve column 2 includes a first side column 21 and a second side column 22, and the first side column 21 and the second side column 22 are arranged in parallel and communicate the first passage 5 and the exhaust muffler 23 through a sieve column solenoid valve 24. When the first side column 21 is pressurized, the second side column 22 is decompressed and analyzed, and when the pressure is lowered, nitrogen gas adsorbed by the molecular sieve is released and discharged to the atmosphere through the exhaust muffler 23 to prepare for the next nitrogen gas adsorption.
In this embodiment, one end of the second channel 6 is communicated with the oxygen outlet of the molecular sieve tower 2, and the other end is communicated with the inlet of the first oxygen storage tank 3. A second check valve 61 is provided on the second passage 6 to prevent the oxygen in the first oxygen storage tank 3 from flowing backward to the molecular sieve column 2. In addition, a second branch point 10 is provided in the second passage 6 to communicate with the other passages. In this embodiment, the first oxygen tank 3 is provided with a pressure sensor 31 to measure the pressure of oxygen in the first oxygen tank 3. A pressure regulating valve 32, a filter 33, a float flow meter 34, an outlet check valve 35 and a concentration sensor 36 are provided in this order in communication with the outlet passage of the first oxygen tank 3 to output oxygen gas suitable for human use.
In the embodiment, the third channel 7 is communicated with the second branch point 10, the fourth channel 8 is communicated with the first branch point 9, the inlet of the second oxygen storage tank 4 is communicated with the third channel 7, and the outlet is communicated with the fourth channel 8. In this embodiment, the third passage 7 is provided with a third check valve 72, the fourth passage 8 is provided with an outlet solenoid valve 82, the third check valve 72 ensures that the air intake direction of the second oxygen tank 4 is correct, the outlet solenoid valve 82 is a normally closed two-position three-way solenoid valve, and the fourth passage 8 is opened at regular time.
In this embodiment, the volume of the second oxygen tank 4 is greater than the volume of the molecular sieve column 2, and may be up to four times or more. In addition, the oxygen pressure in the second oxygen storage tank 4 is 110-170kpa, the humidity of the compressed air input into the molecular sieve tower 2 by the compressor 1 is 30% RH-90% RH, and the relative humidity of the oxygen generated by the molecular sieve tower is less than 10% RH. The operating pressure at which the third check valve 72 opens is less than 5kPa, and the opening pressure of the outlet solenoid valve 82 is 35 kPa.
The working process of this embodiment is as follows:
1. the power supply is turned on, the compressor 1 works to pressurize and compress the outside air, and the compressed air is introduced into the molecular sieve tower 2 through the control of the sieve tower electromagnetic valve 24.
2. Along with the continuous entering of compressed air, the gas pressure in the molecular sieve tower 2 rises, and under high pressure, the molecular sieve can adsorb nitrogen molecules in the air, and oxygen molecules flow through the molecular sieve tower 2 and enter the first oxygen storage tank 3 through the second one-way valve 61.
3. Under the control of the sieve electromagnetic valve 24, when the first side column 21 is pressurized, the second side column 22 is decompressed and analyzed, and when the pressure is reduced, nitrogen gas adsorbed by the molecular sieve is released and discharged to the atmosphere through the exhaust muffler 23 to prepare for the next nitrogen gas adsorption.
4. During the continuous process of pressure adsorption and pressure reduction desorption in the molecular sieve column 2, high-concentration oxygen is continuously injected into the first oxygen storage tank 3. The oxygen in the first oxygen storage tank 3 is subjected to pressure reduction and pressure regulation by the pressure regulating valve, passes through the filter 33, and is output by a pipeline for people to use.
5. During the continuous process of pressure adsorption and pressure reduction desorption in the molecular sieve column 2, the generated oxygen will also flow to the second oxygen storage tank 4, and the outlet solenoid valve 82 is closed, and the oxygen pressure in the second oxygen storage tank 4 will be kept to vary between 110-. The pressure of the dry oxygen flowing into the second oxygen tank 4 will rise continuously and eventually will remain the same as the highest pressure of oxygen in the first oxygen tank 3. But will be below the discharge compressed air pressure of the compressor 1.
6. After a customer presses a stop button, the compressor 1 stops working, and the sieve tower electromagnetic valve 24 performs switching actions for 2 times, so that high-pressure air in the molecular sieve tower 2 is discharged. At this time, the outlet solenoid valve 82 is opened, and the dry oxygen in the second oxygen tank 4 flows into the molecular sieve column 2 through the outlet solenoid valve 82.
In this embodiment, the air in the molecular sieve column 2 is discharged through the above process, and dry oxygen is introduced. The molecular sieve can be kept in a dry gas environment during the intermittent period of the operation of the machine, and the molecular sieve is prevented from absorbing moisture and agglomerating. The service life of the whole machine is prolonged.
In this embodiment, after the sieve column solenoid valve 24 is operated 2 times and the high-pressure air in the molecular sieve column 2 is exhausted, oxygen is fed back to the molecular sieve column 2. Therefore, on the premise that the volume of the second oxygen storage tank 4 is fixed, the final oxygen content in the molecular sieve tower 2 is high, and the molecular sieve tower is drier.
Third embodiment
Fig. 3 is a schematic structural diagram of a third embodiment of the oxygen generator with gas feedback protection according to the present invention, as shown in fig. 3. In this embodiment, an air filter 11 is connected to an inlet of the compressor 1, an outlet of the compressor is communicated with the first passage 5, a first check valve 51 is disposed on the first passage 5, the compressor 1 inputs compressed air into the molecular sieve column 2 through the first passage 5, and the first check valve 51 prevents reverse input of gas into the compressor 1. In addition, a first branch point 9 is provided on the first channel to communicate with the other channels.
In this embodiment, the molecular sieve column 2 includes a first side column 21 and a second side column 22, and the first side column 21 and the second side column 22 are arranged in parallel and communicate the first passage 5 and the exhaust muffler 23 through a sieve column solenoid valve 24. When the first side column 21 is pressurized, the second side column 22 is decompressed and analyzed, and when the pressure is lowered, nitrogen gas adsorbed by the molecular sieve is released and discharged to the atmosphere through the exhaust muffler 23 to prepare for the next nitrogen gas adsorption.
In this embodiment, one end of the second channel 6 is communicated with the oxygen outlet of the molecular sieve tower 2, and the other end is communicated with the inlet of the first oxygen storage tank 3. A second check valve 61 is provided on the second passage 6 to prevent the oxygen in the first oxygen storage tank 3 from flowing backward to the molecular sieve column 2. In addition, a second branch point 10 is provided in the second passage 6 to communicate with the other passages. In this embodiment, the first oxygen tank 3 is provided with a pressure sensor 31 to measure the pressure of oxygen in the first oxygen tank 3. A pressure regulating valve 32, a filter 33, a float flow meter 34, an outlet check valve 35 and a concentration sensor 36 are provided in this order in communication with the outlet passage of the first oxygen tank 3 to output oxygen gas suitable for human use.
In the embodiment, the third channel 7 is communicated with the second branch point 10, the fourth channel 8 is communicated with the first branch point 9, the inlet of the second oxygen storage tank 4 is communicated with the third channel 7, and the outlet is communicated with the fourth channel 8. In this embodiment, the third passage 7 is provided with an inlet solenoid valve 73 and an inlet throttle valve 74, and the fourth passage 8 is provided with an outlet solenoid valve 83. The inlet solenoid valve 73 is a normally closed two-position three-way solenoid valve, the third passage 7 is opened at a fixed time, the inlet throttle valve 74 regulates the flow of oxygen passing through the third passage 7, and the outlet solenoid valve 82 is a normally closed two-position three-way solenoid valve, and the fourth passage 8 is opened at a fixed time.
In this embodiment, the volume of the second oxygen tank 4 is greater than the volume of the molecular sieve column 2, and may be up to four times or more. In addition, the oxygen pressure in the second oxygen storage tank 4 is 110-170kpa, the humidity of the compressed air input into the molecular sieve tower 2 by the compressor 1 is 30% RH-90% RH, and the relative humidity of the oxygen generated by the molecular sieve tower is less than 10% RH. Further, the opening pressures of the inlet solenoid valve 73 and the outlet solenoid valve 83 are 35 kPa.
The working process of this embodiment is as follows:
1. the power supply is turned on, the compressor 1 works to pressurize and compress the outside air, and the compressed air is introduced into the molecular sieve tower 2 through the control of the sieve tower electromagnetic valve 24.
2. Along with the continuous entering of compressed air, the gas pressure in the molecular sieve tower 2 rises, and under high pressure, the molecular sieve can adsorb nitrogen molecules in the air, and oxygen molecules flow through the molecular sieve tower 2 and enter the first oxygen storage tank 3 through the second one-way valve 61.
3. Under the control of the sieve electromagnetic valve 24, when the first side column 21 is pressurized, the second side column 22 is decompressed and analyzed, and when the pressure is reduced, nitrogen gas adsorbed by the molecular sieve is released and discharged to the atmosphere through the exhaust muffler 23 to prepare for the next nitrogen gas adsorption.
4. During the continuous process of pressure adsorption and pressure reduction desorption in the molecular sieve column 2, high-concentration oxygen is continuously injected into the first oxygen storage tank 3. The oxygen in the first oxygen storage tank 3 is subjected to pressure reduction and pressure regulation by the pressure regulating valve, passes through the filter 33, and is output by a pipeline for people to use.
5. In the initial process of continuous pressure adsorption and pressure reduction desorption of the molecular sieve column 2, the inlet solenoid valve 73 is in a closed state, and the generated oxygen does not flow to the second oxygen storage tank 4 at the same time. After a certain time, the oxygen production concentration reaches the maximum concentration, and after the oxygen production is stabilized, the inlet solenoid valve 73 is opened, and the oxygen generated by the molecular sieve column 2 flows to the first oxygen storage tank 3 and the second oxygen storage tank 4 at the same time. At this time, the outlet solenoid valve 83 is closed, and the oxygen pressure in the second oxygen storage tank 4 is kept to vary between 110 and 170 kpa. The pressure of the dry oxygen flowing into the second oxygen tank 4 will rise continuously and eventually will remain the same as the highest pressure of oxygen in the first oxygen tank 3. But will be below the discharge compressed air pressure of the compressor 1.
6. After a customer presses a stop button, the compressor 1 stops working, and the sieve tower electromagnetic valve 24 performs switching actions for 2 times, so that high-pressure air in the molecular sieve tower 2 is discharged. At this time, the outlet solenoid valve 83 is opened, and the dry oxygen in the second oxygen storage tank 4 flows into the molecular sieve column 2 through the outlet solenoid valve 83.
In this embodiment, the air in the molecular sieve column 2 is discharged through the above process, and dry oxygen is introduced. The molecular sieve can be kept in a dry gas environment during the intermittent period of the operation of the machine, and the molecular sieve is prevented from absorbing moisture and agglomerating. The service life of the whole machine is prolonged.
In this embodiment, after the sieve column solenoid valve 24 is operated 2 times and the high-pressure air in the molecular sieve column 2 is exhausted, oxygen is fed back to the molecular sieve column 2. Therefore, on the premise that the volume of the second oxygen storage tank 4 is fixed, the final oxygen content in the molecular sieve tower 2 is high, and the molecular sieve tower is drier.
Fourth embodiment
Fig. 4 is a schematic structural diagram of a fourth embodiment of the oxygen generator with gas feedback protection of the present invention, as shown in fig. 4. In this embodiment, an air filter 11 is connected to an inlet of the compressor 1, an outlet of the compressor is communicated with the first passage 5, a first check valve 51 is disposed on the first passage 5, the compressor 1 inputs compressed air into the molecular sieve column 2 through the first passage 5, and the first check valve 51 prevents reverse input of gas into the compressor 1. In addition, a first branch point 9 is provided on the first channel to communicate with the other channels.
In this embodiment, the molecular sieve column 2 includes a first side column 21 and a second side column 22, and the first side column 21 and the second side column 22 are arranged in parallel and communicate the first passage 5 and the exhaust muffler 23 through a sieve column solenoid valve 24. When the first side column 21 is pressurized, the second side column 22 is decompressed and analyzed, and when the pressure is lowered, nitrogen gas adsorbed by the molecular sieve is released and discharged to the atmosphere through the exhaust muffler 23 to prepare for the next nitrogen gas adsorption.
In this embodiment, one end of the second channel 6 is communicated with the oxygen outlet of the molecular sieve tower 2, and the other end is communicated with the inlet of the first oxygen storage tank 3. A second check valve 61 is provided on the second passage 6 to prevent the oxygen in the first oxygen storage tank 3 from flowing backward to the molecular sieve column 2. In addition, a second branch point 10 is provided in the second passage 6 to communicate with the other passages. In this embodiment, the first oxygen tank 3 is provided with a pressure sensor 31 to measure the pressure of oxygen in the first oxygen tank 3. A pressure regulating valve 32, a filter 33, a float flow meter 34, an outlet check valve 35 and a concentration sensor 36 are provided in this order in communication with the outlet passage of the first oxygen tank 3 to output oxygen gas suitable for human use.
In the embodiment, the third channel 7 is communicated with the second branch point 10, the fourth channel 8 is communicated with the first branch point 9, the inlet of the second oxygen storage tank 4 is communicated with the third channel 7, and the outlet is communicated with the fourth channel 8. In this embodiment, the third passage 7 is provided with an inlet solenoid valve 75 and an inlet throttle valve 76, and the fourth passage 8 is provided with a fourth check valve 84. The inlet electromagnetic valve 75 is a normally closed two-position three-way electromagnetic valve, the third channel 7 is opened at regular time, the inlet throttle valve 76 regulates the flow of oxygen passing through the third channel 7, and the fourth check valve 84 ensures that the flow direction of the fourth channel 8 is correct.
In this embodiment, the volume of the second oxygen tank 4 is greater than the volume of the molecular sieve column 2, and may be up to four times or more. In addition, the oxygen pressure in the second oxygen storage tank 4 is 110-170kpa, the humidity of the compressed air input into the molecular sieve tower 2 by the compressor 1 is 30% RH-90% RH, and the relative humidity of the oxygen generated by the molecular sieve tower is less than 10% RH. Further, the opening pressure of the inlet solenoid valve 75 is 35kPa, and the working pressure at which the fourth check valve 84 is opened is less than 5 kPa.
The working process of this embodiment is as follows:
1. the power supply is turned on, the compressor 1 works to pressurize and compress the outside air, and the compressed air is introduced into the molecular sieve tower 2 through the control of the sieve tower electromagnetic valve 24.
2. Along with the continuous entering of compressed air, the gas pressure in the molecular sieve tower 2 rises, and under high pressure, the molecular sieve can adsorb nitrogen molecules in the air, and oxygen molecules flow through the molecular sieve tower 2 and enter the first oxygen storage tank 3 through the second one-way valve 61.
3. Under the control of the sieve electromagnetic valve 24, when the first side column 21 is pressurized, the second side column 22 is decompressed and analyzed, and when the pressure is reduced, nitrogen gas adsorbed by the molecular sieve is released and discharged to the atmosphere through the exhaust muffler 23 to prepare for the next nitrogen gas adsorption.
4. During the continuous process of pressure adsorption and pressure reduction desorption in the molecular sieve column 2, high-concentration oxygen is continuously injected into the first oxygen storage tank 3. The oxygen in the first oxygen storage tank 3 is subjected to pressure reduction and pressure regulation by the pressure regulating valve, passes through the filter 33, and is output by a pipeline for people to use.
5. In the initial process of the molecular sieve column 2 continuously performing the pressure adsorption and the pressure reduction desorption, the inlet solenoid valve 75 is in a closed state, and the generated oxygen does not flow to the second oxygen storage tank 4 at the same time. After a certain time, the oxygen generation concentration reaches the maximum concentration, and after the oxygen generation is stabilized, the inlet solenoid valve 75 is opened again, and the oxygen generated by the molecular sieve column 2 flows to the first oxygen storage tank 3 and the second oxygen storage tank 4 at the same time. The dry oxygen in the second oxygen tank 4 will flow to the molecular sieve column 2 through the fourth check valve 84.
In this embodiment, the air in the molecular sieve column 2 is discharged through the above process, and dry oxygen is introduced. The molecular sieve can be kept in a dry gas environment during the intermittent period of the operation of the machine, and the molecular sieve is prevented from absorbing moisture and agglomerating. The service life of the whole machine is prolonged.
In addition, the invention provides a method for protecting a molecular sieve by gas feedback, which can be carried out by using the structure and also can be carried out by adopting other structures, and the method specifically comprises the following steps:
compressed air is input into the molecular sieve tower through a compressor.
The molecular sieve tower works, dry oxygen is input into a first oxygen storage tank and a second oxygen storage tank, in the process, the molecular sieve tower can work, dry oxygen is input into the first oxygen storage tank and the second oxygen storage tank simultaneously, dry oxygen is input into the first oxygen storage tank firstly, and after the oxygen pressure in the first oxygen storage tank reaches a set value, dry oxygen is input into the second oxygen storage tank.
The molecular sieve column stops working and exhausts air.
And the dry oxygen stored in the second oxygen storage tank enters the molecular sieve tower.
In the method, the pressure of the gas in the second oxygen storage tank is less than the outlet pressure of the compressor during operation, and the pressure of the oxygen in the second oxygen storage tank is 110-. In addition, the humidity of the compressed air input into the molecular sieve tower by the compressor is 30% RH-90% RH, and the relative humidity of the oxygen generated by the molecular sieve tower is less than 10% RH.
The foregoing description of certain preferred embodiments of the invention has been presented with reference to the drawings. It should be understood by those of ordinary skill in the art that the specific constructions and processes illustrated in the foregoing detailed description are exemplary only, and are not limiting. Furthermore, the various features shown above can be combined in various possible ways to form new solutions, or other modifications, by a person skilled in the art, all falling within the scope of the present invention.
Claims (13)
1. The utility model provides an oxygenerator with gaseous feedback protection, includes compressor, molecular sieve tower and first oxygen storage tank, the compressor passes through first passageway intercommunication the molecular sieve tower, the molecular sieve tower passes through the second passageway intercommunication first oxygen storage tank, its characterized in that: the oxygenerator still includes the second oxygen storage tank, first passageway is including first branch point, the second passageway is including the second branch point, the second oxygen storage tank passes through the third passageway intercommunication the second divides the point, the second oxygen storage tank passes through the fourth passageway intercommunication first branch point, the export of compressor with be provided with first check valve between the first branch point, be provided with the third valve body on the third passageway, be provided with the fourth valve body on the fourth passageway, the control of third valve body the molecular sieve tower is given vent to anger and is got into the second oxygen storage tank, the control of fourth valve body the gaseous entering of second oxygen storage tank the molecular sieve tower.
2. The oxygen generator with gas feedback protection according to claim 1, wherein: the third valve body is a one-way valve and controls the air outlet in the molecular sieve tower to enter the second oxygen storage tank.
3. The oxygen generator with gas feedback protection according to claim 2, wherein: the fourth valve body is a one-way valve and controls the gas in the second oxygen storage tank to enter the molecular sieve tower.
4. The oxygen generator with gas feedback protection according to claim 2, wherein: the fourth valve body is an electromagnetic valve and controls the gas in the second oxygen storage tank to enter the molecular sieve tower.
5. The oxygen generator with gas feedback protection according to claim 1, wherein: the third valve body is an electromagnetic valve and controls the gas outlet in the molecular sieve tower to enter the second oxygen storage tank.
6. The oxygen generator with gas feedback protection according to claim 5, wherein: and a throttle valve is also arranged on a third channel between the second oxygen storage tank and the electromagnetic valve.
7. The oxygen generator with gas feedback protection according to any one of claims 5 to 6, wherein: the fourth valve body is an electromagnetic valve and controls the gas in the second oxygen storage tank to enter the molecular sieve tower.
8. The oxygen generator with gas feedback protection according to any one of claims 5 to 6, wherein: the fourth valve body is a one-way valve and controls the gas in the second oxygen storage tank to enter the molecular sieve tower.
9. The oxygen generator with gas feedback protection according to claim 1, wherein: the volume of the second oxygen storage tank is larger than that of the molecular sieve tower.
10. A method for protecting a molecular sieve by a gas feedback method is characterized by comprising the following steps: the method comprises the following steps:
inputting compressed air into the molecular sieve tower through a compressor;
the molecular sieve tower works, and dry oxygen is input into the first oxygen storage tank and the second oxygen storage tank;
the molecular sieve tower stops working and exhausts air;
and the dry oxygen stored in the second oxygen storage tank enters the molecular sieve tower.
11. The method of claim 10, wherein the gas feedback protection of the molecular sieve comprises: when the molecular sieve tower works, dry oxygen is simultaneously input into the first oxygen storage tank and the second oxygen storage tank.
12. The method of claim 10, wherein the gas feedback protection of the molecular sieve comprises: when the molecular sieve tower works, dry oxygen is firstly input into the first oxygen storage tank, and after the pressure of the oxygen in the first oxygen storage tank reaches a set value, the dry oxygen is input into the second oxygen storage tank.
13. The method for gas feedback protection of a molecular sieve according to any of claims 10-12, wherein: and the air pressure in the second oxygen storage tank is less than the outlet pressure of the compressor during working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610104070.0A CN107117583B (en) | 2016-02-25 | 2016-02-25 | Oxygen generator with gas feedback protection and method for protecting molecular sieve by gas feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610104070.0A CN107117583B (en) | 2016-02-25 | 2016-02-25 | Oxygen generator with gas feedback protection and method for protecting molecular sieve by gas feedback |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107117583A CN107117583A (en) | 2017-09-01 |
| CN107117583B true CN107117583B (en) | 2021-06-04 |
Family
ID=59717024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610104070.0A Active CN107117583B (en) | 2016-02-25 | 2016-02-25 | Oxygen generator with gas feedback protection and method for protecting molecular sieve by gas feedback |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107117583B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110734039A (en) * | 2019-11-15 | 2020-01-31 | 湖南一特电子医用工程股份有限公司 | medical modular PSA oxygenerator using intelligent algorithm |
| CN113117200A (en) * | 2021-04-19 | 2021-07-16 | 合肥康居人智能科技有限公司 | Pulse control system for portable oxygen generator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2251520A1 (en) * | 1973-11-19 | 1975-06-13 | Sermaee | Disinfection and sterilization of air in automobiles - by generator of ozone and ultra-violet radiation incorporating multivibrator circuit |
| CN102372263A (en) * | 2010-08-17 | 2012-03-14 | 周纪昌 | Molecular sieve pressure-swing adsorption oxygenerator with double oxygen storage tank |
| CN203699897U (en) * | 2013-12-13 | 2014-07-09 | 科迈（常州）电子有限公司 | Household oxygenator with double oxygen tanks |
| EP1902954B1 (en) * | 2006-09-19 | 2015-02-25 | Hamilton Sundstrand Corporation | Jet fuel based high pressure solid oxide fuel cell system |
| CN204434280U (en) * | 2015-03-02 | 2015-07-01 | 欧姆龙健康医疗事业株式会社 | Oxygenerator |
-
2016
- 2016-02-25 CN CN201610104070.0A patent/CN107117583B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2251520A1 (en) * | 1973-11-19 | 1975-06-13 | Sermaee | Disinfection and sterilization of air in automobiles - by generator of ozone and ultra-violet radiation incorporating multivibrator circuit |
| EP1902954B1 (en) * | 2006-09-19 | 2015-02-25 | Hamilton Sundstrand Corporation | Jet fuel based high pressure solid oxide fuel cell system |
| CN102372263A (en) * | 2010-08-17 | 2012-03-14 | 周纪昌 | Molecular sieve pressure-swing adsorption oxygenerator with double oxygen storage tank |
| CN203699897U (en) * | 2013-12-13 | 2014-07-09 | 科迈（常州）电子有限公司 | Household oxygenator with double oxygen tanks |
| CN204434280U (en) * | 2015-03-02 | 2015-07-01 | 欧姆龙健康医疗事业株式会社 | Oxygenerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107117583A (en) | 2017-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109613859B (en) | Molecular sieve oxygen generator and control system and method thereof | |
| CN101680333B (en) | Urea water feeder for internal combustion engine | |
| US8328913B2 (en) | Flammable gas concentration system | |
| PL1773472T3 (en) | Method for drying a gas and device therefor | |
| CN107117583B (en) | Oxygen generator with gas feedback protection and method for protecting molecular sieve by gas feedback | |
| CN206152657U (en) | Low humidity humidity generating device | |
| CN204508806U (en) | A kind of medical oxygen generator ensureing oxygen concentration | |
| CN101617030A (en) | Flammable gas concentration system | |
| JP4798016B2 (en) | Oxygen concentrator | |
| CN209847682U (en) | Domestic hyperbaric oxygen treatment equipment | |
| CN204522671U (en) | Multistage handing-over absorption method oil-gas recovery processing device | |
| CN208229602U (en) | Energy saving nitrogen making machine | |
| JP5226282B2 (en) | Oxygen concentrator | |
| CN212675381U (en) | PID automatic switching adsorption period system | |
| CN205442846U (en) | Water purifier with built -in pressurized water storage tank | |
| CN210457464U (en) | Small-sized oxygen generator | |
| CN204151064U (en) | The pressure swing adsorption oxygen generating device | |
| CN209771750U (en) | Oil gas emission processing device of filling station | |
| CN103723684B (en) | Oxygen generator with cyclic filtration function | |
| CN206616012U (en) | Medical oxygen producing purifying plant | |
| CN216537759U (en) | Intelligent phosphine tail gas purification and discharge device | |
| CN205760469U (en) | A kind of secondary absorption retracting device of entrucking tail gas | |
| CN204768058U (en) | Painting workshop with VOC dust purification system | |
| CN202729800U (en) | Nitrogen generator capable of reproducibly utilizing unqualified nitrogen | |
| CN202988713U (en) | Oxygenerator scavenging exhaust gas through injection of air |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170927 Address after: IC-45-1, Dalian Free Trade Zone, Liaoning, China Applicant after: OMRON health medical (China) Co., Ltd. Address before: The Japanese city of Kyoto in Japan Applicant before: Omron Healthcare Co., Ltd. |
|
| TA01 | Transfer of patent application right | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |