Molecular sieve oxygen generation device
By introducing a vacuum pump into the molecular sieve oxygen-making device, the nitrogen inside the molecular sieve tower is extracted, and the problems of low oxygen production efficiency and high cost in the prior art are solved, thereby achieving a more efficient oxygen production process and a lower operating cost.
Patent Information
- Application Number
- CN202421627881.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The existing molecular sieve oxygen production technology has the problems of low oxygen production efficiency and high oxygen production cost.
A molecular sieve oxygen-generating device is designed, including a compressed air source, a first three-way valve, a first molecular sieve tower, a first flow limiting valve and a vacuum air sucker. The nitrogen inside the molecular sieve tower is extracted through a vacuum air sieve tower, increasing the internal air pressure difference value, and increasing the nitrogen adsorption amount and oxygen production amount.
The nitrogen adsorption amount of the molecular sieve tower is increased, the oxygen production amount is increased, the oxygen production cost is reduced, and the pressure resistance modification cost to the compressed air source and pipeline is reduced.
Smart Images
Figure CN222752912U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of molecular sieves, in particular to a molecular sieve oxygen production device. Background Art
[0002] The commonly used principle of molecular sieve oxygen production using pressure swing adsorption is to use a specific adsorbent to separate oxygen and nitrogen in the air under a certain pressure. Specifically, it is to use a molecular sieve that is easier to adsorb nitrogen than oxygen, and the greater the pressure, the stronger the adsorption capacity, and vice versa. Therefore, the process of increasing pressure is used to adsorb nitrogen and discharge oxygen, and when the pressure is released, the adsorbed nitrogen is discharged to complete the regeneration, and the cycle is repeated to complete the oxygen production process. In actual production, dual towers or multiple towers are used to work in turn to maintain uninterrupted and stable oxygen production. The applicant found in actual production that the molecular sieve oxygen production method in the related technology has problems such as low oxygen production efficiency and high oxygen production cost. Utility Model Content
[0003] Based on this, it is necessary to provide a molecular sieve oxygen production device to address the problems of low oxygen production efficiency and high oxygen production cost in the molecular sieve oxygen production method in the related technology.
[0004] A molecular sieve oxygen production device, comprising a compressed air source, a first three-way valve, a first molecular sieve tower, a first flow limiting valve and a vacuum pump;
[0005] The compressed air source includes a first interface and a second interface, the first three-way valve includes a third interface, a fourth interface and a fifth interface, the first molecular sieve tower includes a sixth interface and a seventh interface, the first limiting valve includes an eighth interface and a ninth interface, and the vacuum pump includes a tenth interface and an eleventh interface;
[0006] The first interface is connected to the atmospheric environment, the second interface is connected to the third interface, the fourth interface is connected to the sixth interface, the seventh interface is connected to the eighth interface, the ninth interface is connected to the oxygen storage tank, the fifth interface is connected to the tenth interface, and the eleventh interface is connected to the atmospheric environment;
[0007] The compressed air source is used to extract air through the first interface, compress the extracted air, and inject the compressed air into the third interface through the second interface;
[0008] The first three-way valve is used to connect the third interface and the fourth interface, and close the fifth interface, obtain compressed air through the third interface, and inject compressed air into the sixth interface through the fourth interface;
[0009] The first molecular sieve tower is used to obtain compressed air through the sixth interface, adsorb nitrogen in the compressed air, and inject oxygen in the compressed air into the eighth interface through the seventh interface;
[0010] The first flow limiting valve is used to obtain oxygen through the eighth interface and inject the obtained oxygen into the oxygen storage tank through the ninth interface;
[0011] The first three-way valve is also used to close the third interface and connect the fifth interface and the fourth interface when the internal air pressure of the first molecular sieve tower is equal to the air pressure injected into the third interface by the compressed air source;
[0012] The vacuum pump is used to connect the tenth interface and the eleventh interface when the first three-way valve connects the fifth interface and the fourth interface, extract nitrogen inside the first molecular sieve tower through the tenth interface, and discharge the extracted nitrogen into the atmosphere through the eleventh interface;
[0013] The first three-way valve is also used to connect the third interface and the fourth interface again and close the fifth interface when the internal air pressure of the first molecular sieve tower is less than a preset air pressure threshold.
[0014] The molecular sieve oxygen production device includes a compressed air source, a first three-way valve, a first molecular sieve tower, a first flow limiting valve and a vacuum pump; the compressed air source includes a first interface and a second interface, the first three-way valve includes a third interface, a fourth interface and a fifth interface, the first molecular sieve tower includes a sixth interface and a seventh interface, the first flow limiting valve includes an eighth interface and a ninth interface, and the vacuum pump includes a tenth interface and an eleventh interface; the first interface is connected to the atmospheric environment, the second interface is connected to the third interface, the fourth interface is connected to the sixth interface, the seventh interface is connected to the eighth interface, the ninth interface is connected to the oxygen storage tank, the fifth interface is connected to the tenth interface, and the eleventh interface is connected to the atmospheric environment. Through the mutual cooperation of the compressed air source, the first three-way valve, the first molecular sieve tower, the first flow limiting valve and the vacuum pump, the first molecular sieve tower can be vacuumed in the exhaust stage of the first molecular sieve tower, thereby increasing the internal pressure difference of the first molecular sieve tower at the beginning of air intake and the end of exhaust, increasing the nitrogen adsorption of the first molecular sieve tower, increasing the oxygen production, and reducing the oxygen production cost.
[0015] In one embodiment, the molecular sieve oxygen production device further includes a booster compressor, and the ninth interface is connected to the oxygen storage tank through the booster compressor;
[0016] The booster compressor comprises a twelfth interface and a thirteenth interface, the ninth interface is connected to the twelfth interface, and the thirteenth interface is connected to the oxygen storage tank;
[0017] The booster compressor is used to extract oxygen from the inside of the first molecular sieve tower through the twelfth interface, and inject the extracted oxygen into the oxygen storage tank through the thirteenth interface.
[0018] In one embodiment, it also includes a second three-way valve, a second molecular sieve tower and a second flow limiting valve;
[0019] The second three-way valve includes a fourteenth interface, a fifteenth interface and a sixteenth interface, the second molecular sieve tower includes a seventeenth interface and an eighteenth interface, the second flow limiting valve includes a nineteenth interface and a twentieth interface, and the vacuum pump also includes a twenty-first interface;
[0020] The fourteenth interface is connected to the second interface, the fifteenth interface is connected to the seventeenth interface, the eighteenth interface is connected to the nineteenth interface, the twenty-th interface is connected to the twelfth interface, and the sixteenth interface is connected to the twenty-first interface;
[0021] The compressed air source is further used to inject compressed air into the fourteenth interface through the second interface;
[0022] The second three-way valve is used to close the sixteenth interface and connect the fourteenth interface and the fifteenth interface when the first three-way valve closes the third interface and connects the fifth interface and the fourth interface, obtain compressed air through the fourteenth interface, and inject compressed air into the seventeenth interface through the fifteenth interface;
[0023] The second molecular sieve tower is used to obtain compressed air through the seventeenth interface, adsorb nitrogen in the compressed air, and inject oxygen in the compressed air into the nineteenth interface through the eighteenth interface;
[0024] The second flow limiting valve is used to obtain oxygen through the nineteenth interface and inject the obtained oxygen into the twelfth interface through the twentieth interface;
[0025] The booster compressor is also used to extract oxygen from the second molecular sieve tower through the twelfth interface, and inject the extracted oxygen into the oxygen storage tank through the thirteenth interface;
[0026] The second three-way valve is also used to close the fourteenth interface and connect the fifteenth interface and the sixteenth interface when the internal air pressure of the second molecular sieve tower is equal to the air pressure injected into the fourteenth interface by the compressed air source;
[0027] The first three-way valve is further used to connect the third interface and the fourth interface again and close the fifth interface when the second three-way valve closes the fourteenth interface and connects the fifteenth interface and the sixteenth interface;
[0028] The vacuum pump is further used for connecting the eleventh interface and the twenty-first interface when the second three-way valve connects the fifteenth interface and the sixteenth interface, extracting nitrogen inside the second molecular sieve tower through the twenty-first interface, and discharging the extracted nitrogen into the atmosphere through the eleventh interface;
[0029] The second three-way valve is also used to connect the fourteenth interface and the fifteenth interface again and close the sixteenth interface when the internal air pressure of the second molecular sieve tower is less than a preset air pressure threshold.
[0030] In one embodiment, the vacuum pump is installed above the first molecular sieve tower and the second molecular sieve tower.
[0031] In one embodiment, the booster compressor is installed below the first molecular sieve tower and the second molecular sieve tower.
[0032] In one embodiment, the structure of the first molecular sieve tower is exactly the same as the structure of the second molecular sieve tower.
[0033] In one embodiment, a first pressure sensor is installed inside the first molecular sieve tower, and a second pressure sensor is installed inside the second molecular sieve tower;
[0034] The first pressure sensor is electrically connected to the first three-way valve, and the second pressure sensor is electrically connected to the second three-way valve;
[0035] The first pressure sensor is used to obtain internal air pressure data of the first molecular sieve tower, and send the obtained air pressure data to the first three-way valve;
[0036] The second pressure sensor is used to obtain internal air pressure data of the second molecular sieve tower, and send the obtained air pressure data to the second three-way valve;
[0037] The first three-way valve is used to open and close the interface according to the air pressure data sent by the first pressure sensor, and the second three-way valve is used to open and close the interface according to the air pressure data sent by the second pressure sensor.
[0038] In one embodiment, the vacuum pump includes a pumping controller, and the pumping controller is electrically connected to the first three-way valve and the second three-way valve respectively;
[0039] The air extraction controller is used to obtain interface opening and closing information from the first three-way valve and the second three-way valve, and adjust the air extraction interface according to the interface opening and closing information. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] Figure 1 This is a schematic diagram of the coordination structure of a molecular sieve oxygen production device and an oxygen storage tank according to an embodiment of the utility model;
[0041] Figure 2 This is a schematic diagram of the coordination structure of a molecular sieve oxygen production device and an oxygen storage tank according to another embodiment of the utility model;
[0042] Figure 3 This is a schematic diagram of the coordination structure of a molecular sieve oxygen production device and an oxygen storage tank according to another embodiment of the utility model;
[0043] Among them, 1 is the first interface, 2 is the second interface, 3 is the third interface, 4 is the fourth interface, 5 is the fifth interface, 6 is the sixth interface, 7 is the seventh interface, 8 is the eighth interface, 9 is the ninth interface, 10 is the tenth interface, 11 is the eleventh interface, 12 is the twelfth interface, 13 is the thirteenth interface, 14 is the fourteenth interface, 15 is the fifteenth interface, 16 is the sixteenth interface, 17 is the seventeenth interface, 18 is the eighteenth interface, 19 is the nineteenth interface, 20 is the twentieth interface, and 21 is the twenty-first interface. DETAILED DESCRIPTION
[0044] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0045] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only."
[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0047] like Figure 1 The figure shows a molecular sieve oxygen production device according to an embodiment of the present invention.
[0048] The molecular sieve oxygen production device includes a compressed air source, a first three-way valve, a first molecular sieve tower, a first flow limiting valve and a vacuum pump. The first molecular sieve tower contains a special adsorbent, which has a greater adsorption effect on nitrogen than on oxygen, so that nitrogen and oxygen in the air can be separated. The vacuum pump can extract gas from a closed system by mechanical or physical means, so that the internal air pressure of the system is lower than the atmospheric pressure to achieve the purpose of exhausting.
[0049] The compressed air source includes a first interface and a second interface, the first three-way valve includes a third interface, a fourth interface and a fifth interface, the first molecular sieve tower includes a sixth interface and a seventh interface, the first limiting valve includes an eighth interface and a ninth interface, and the vacuum pump includes a tenth interface and an eleventh interface.
[0050] The first interface is connected to the atmospheric environment, the second interface is connected to the third interface, the fourth interface is connected to the sixth interface, the seventh interface is connected to the eighth interface, the ninth interface is connected to the oxygen storage tank, the fifth interface is connected to the tenth interface, and the eleventh interface is connected to the atmospheric environment.
[0051] According to the change process of the internal air pressure of the first molecular sieve tower, the working process of the molecular sieve oxygen production device can be divided into two stages. The first stage is that the internal air pressure of the first molecular sieve tower increases from vacuum negative pressure to the pressure equal to the compressed air output by the compressed air source; the second stage is that the internal air pressure of the first molecular sieve tower decreases from the pressure equal to the compressed air output by the compressed air source to vacuum negative pressure.
[0052] The compressed air source is used to extract air through the first interface, compress the extracted air, and inject the compressed air into the third interface through the second interface; the first three-way valve is used to connect the third interface and the fourth interface, and close the fifth interface, obtain compressed air through the third interface, and inject the compressed air into the sixth interface through the fourth interface; the first molecular sieve tower is used to obtain compressed air through the sixth interface, adsorb nitrogen in the compressed air, and inject oxygen in the compressed air into the eighth interface through the seventh interface; the first limiting valve is used to obtain oxygen through the eighth interface, and inject the obtained oxygen into the oxygen storage tank through the ninth interface; the first three The three-way valve is also used to close the third interface and connect the fifth interface with the fourth interface when the internal air pressure of the first molecular sieve tower is equal to the air pressure injected into the third interface by the compressed air source; the vacuum pump is used to connect the tenth interface with the eleventh interface when the first three-way valve connects the fifth interface with the fourth interface, extract the nitrogen inside the first molecular sieve tower through the tenth interface, and discharge the extracted nitrogen into the atmosphere through the eleventh interface; the first three-way valve is also used to connect the third interface with the fourth interface again and close the fifth interface when the internal air pressure of the first molecular sieve tower is less than the preset air pressure threshold, so as to repeat the oxygen production.
[0053] It should be noted that in the prior art, the fifth interface is directly connected to the atmospheric environment, that is, when the internal air pressure of the first molecular sieve tower is equal to the compressed air pressure output by the compressed air source, the internal air pressure of the first molecular sieve tower is reduced through the fifth interface until the internal air pressure of the first molecular sieve tower is equal to the air pressure of the atmospheric environment; then the compressed air is injected into the first molecular sieve tower again through the compressed air source to repeat the oxygen production process. In this way, oxygen will only be produced by the ninth interface during the process in which the internal air pressure of the first molecular sieve tower increases from the atmospheric environment pressure to the compressed air pressure; oxygen will not be produced by the ninth interface during the process in which the internal air pressure of the first molecular sieve tower decreases from the compressed air pressure to the atmospheric environment pressure. The oxygen production of the first molecular sieve tower depends on the difference between the compressed air pressure and the atmospheric environment pressure, and the greater the difference, the greater the oxygen production of the first molecular sieve tower. Since the atmospheric environment pressure cannot usually be changed, to increase the oxygen production of the first molecular sieve tower, the compressed air pressure output by the compressed air source can only be increased. However, increasing the compressed air pressure output by the compressed air source will increase the noise of the compressed air source, and also increase the cost of pressure-resistant modification of the compressed air source and corresponding pipelines.
[0054] In the embodiment of the utility model, the interior of the first molecular sieve tower can be evacuated by extracting the nitrogen inside the first molecular sieve tower through a vacuum pump. In this way, the oxygen production capacity of the first molecular sieve tower depends on the difference between the compressed air pressure and the vacuum negative pressure. Since the difference between the compressed air pressure and the vacuum negative pressure is greater than the difference between the compressed air pressure and the atmospheric pressure, the molecular sieve oxygen production device of the embodiment of the utility model can improve the oxygen production efficiency. At the same time, the cost of the vacuum pump is also much less than the cost of the pressure-resistant modification of the compressed air source and the corresponding pipelines. In addition, the noise of the vacuum pump is relatively small and will not increase the noise of the molecular sieve oxygen production device.
[0055] The molecular sieve oxygen production device includes a compressed air source, a first three-way valve, a first molecular sieve tower, a first flow limiting valve and a vacuum pump; the compressed air source includes a first interface and a second interface, the first three-way valve includes a third interface, a fourth interface and a fifth interface, the first molecular sieve tower includes a sixth interface and a seventh interface, the first flow limiting valve includes an eighth interface and a ninth interface, and the vacuum pump includes a tenth interface and an eleventh interface; the first interface is connected to the atmospheric environment, the second interface is connected to the third interface, the fourth interface is connected to the sixth interface, the seventh interface is connected to the eighth interface, the ninth interface is connected to the oxygen storage tank, the fifth interface is connected to the tenth interface, and the eleventh interface is connected to the atmospheric environment. Through the mutual cooperation of the compressed air source, the first three-way valve, the first molecular sieve tower, the first flow limiting valve and the vacuum pump, the first molecular sieve tower can be vacuumed in the exhaust stage of the first molecular sieve tower, thereby increasing the internal pressure difference of the first molecular sieve tower at the beginning of air intake and the end of exhaust, increasing the nitrogen adsorption of the first molecular sieve tower, increasing the oxygen production, and reducing the oxygen production cost.
[0056] like Figure 2 FIG. 1 shows a molecular sieve oxygen production device according to another embodiment of the present invention.
[0057] exist Figure 1 On the basis of the corresponding embodiment, the molecular sieve oxygen production device also includes a booster compressor, and the ninth interface is connected to the oxygen storage tank through the booster compressor. The booster compressor includes a twelfth interface and a thirteenth interface, the ninth interface is connected to the twelfth interface, and the thirteenth interface is connected to the oxygen storage tank. The booster compressor is used to extract oxygen inside the first molecular sieve tower through the twelfth interface, and inject the extracted oxygen into the oxygen storage tank through the thirteenth interface. The booster compressor can compress the extracted low-pressure oxygen into high-pressure oxygen for easy oxygen storage.
[0058] In this embodiment, during the process of the internal pressure of the first molecular sieve tower increasing from vacuum negative pressure to compressed air pressure, and during the process of the internal pressure of the first molecular sieve tower decreasing from compressed air pressure to vacuum negative pressure, the booster compressor continuously extracts oxygen from the first molecular sieve tower through the twelfth interface, and injects the extracted oxygen into the oxygen storage tank through the thirteenth interface. Figure 1 Corresponding to the embodiment, the embodiment of the utility model can further improve the oxygen production efficiency.
[0059] like Figure 3 As shown, a molecular sieve oxygen production device according to another embodiment of the present invention is shown.
[0060] exist Figure 2 On the basis of the corresponding embodiment, the molecular sieve oxygen production device further includes a second three-way valve, a second molecular sieve tower and a second flow limiting valve.
[0061] The second three-way valve includes the fourteenth interface, the fifteenth interface and the sixteenth interface, the second molecular sieve tower includes the seventeenth interface and the eighteenth interface, the second flow limiting valve includes the nineteenth interface and the twentieth interface, and the vacuum pump also includes the twenty-first interface.
[0062] The fourteenth interface is connected to the second interface, the fifteenth interface is connected to the seventeenth interface, the eighteenth interface is connected to the nineteenth interface, the twentieth interface is connected to the twelfth interface, and the sixteenth interface is connected to the twenty-first interface.
[0063] The compressed air source is further used to inject compressed air into the fourteenth interface through the second interface. The second three-way valve is used to close the sixteenth interface and connect the fourteenth interface and the fifteenth interface when the first three-way valve closes the third interface and connects the fifth interface and the fourth interface, obtain compressed air through the fourteenth interface, and inject the compressed air into the seventeenth interface through the fifteenth interface; the second molecular sieve tower is used to obtain compressed air through the seventeenth interface, adsorb nitrogen in the compressed air, and inject oxygen in the compressed air into the nineteenth interface through the eighteenth interface; the second limiting valve is used to obtain oxygen through the nineteenth interface and inject the obtained oxygen into the twelfth interface through the twentieth interface; the booster compressor is also used to extract oxygen inside the second molecular sieve tower through the twelfth interface and inject the extracted oxygen into the oxygen storage tank through the thirteenth interface; the second three-way valve is also used to close the fourteenth interface and connect the fifteenth interface and the sixteenth interface when the internal air pressure of the second molecular sieve tower is equal to the air pressure injected into the fourteenth interface by the compressed air source; the first three-way valve is also used to connect the third interface and the fourth interface again and close the fifth interface when the second three-way valve closes the fourteenth interface and connects the fifteenth interface and the sixteenth interface. The vacuum pump is also used to connect the eleventh interface and the twenty-first interface when the second three-way valve connects the fifteenth interface and the sixteenth interface, extract nitrogen inside the second molecular sieve tower through the twenty-first interface, and discharge the extracted nitrogen into the atmosphere through the eleventh interface; the second three-way valve is also used to connect the fourteenth interface and the fifteenth interface again and close the sixteenth interface when the internal air pressure of the second molecular sieve tower is lower than a preset air pressure threshold.
[0064] In this embodiment, by accurately controlling the first three-way valve and the second three-way valve, when the first molecular sieve tower increases the internal pressure to produce oxygen, the second molecular sieve tower reduces the internal pressure to produce oxygen; when the first molecular sieve tower reduces the internal pressure to produce oxygen, the second molecular sieve tower increases the internal pressure to produce oxygen. The booster compressor continuously extracts oxygen from the first molecular sieve tower and the second molecular sieve tower through the twelfth interface, and injects the extracted oxygen into the oxygen storage tank through the thirteenth interface. Compared to Figure 2 Corresponding to the embodiment, the embodiment of the utility model can further improve the oxygen production efficiency.
[0065] The installation positions of the vacuum pump and the booster compressor can be set according to actual needs. Preferably, the vacuum pump is installed above the first molecular sieve tower and the second molecular sieve tower, and the booster compressor is installed below the first molecular sieve tower and the second molecular sieve tower. The vacuum pump is installed above the first molecular sieve tower and the second molecular sieve tower, and the booster compressor is installed below the first molecular sieve tower and the second molecular sieve tower, which can improve the purity of the obtained oxygen.
[0066] Among them, the structure of the first molecular sieve tower is exactly the same as that of the second molecular sieve tower. The installation heights of the first molecular sieve tower and the second molecular sieve tower can be set according to actual needs. Preferably, the installation height of the first molecular sieve tower is equal to the installation height of the second molecular sieve tower. The installation height of the first molecular sieve tower is equal to the installation height of the second molecular sieve tower, which can improve the stability of the oxygen production process.
[0067] Among them, a first pressure sensor is installed inside the first molecular sieve tower, and a second pressure sensor is installed inside the second molecular sieve tower; the first pressure sensor is electrically connected to the first three-way valve, and the second pressure sensor is electrically connected to the second three-way valve; the first pressure sensor is used to obtain the internal air pressure data of the first molecular sieve tower, and send the obtained air pressure data to the first three-way valve; the second pressure sensor is used to obtain the internal air pressure data of the second molecular sieve tower, and send the obtained air pressure data to the second three-way valve; the first three-way valve is used to open and close the interface according to the air pressure data sent by the first pressure sensor, and the second three-way valve is used to open and close the interface according to the air pressure data sent by the second pressure sensor. By installing the first pressure sensor inside the first molecular sieve tower and the second pressure sensor inside the second molecular sieve tower, the accuracy of the oxygen production control process of the molecular sieve oxygen production device can be improved.
[0068] The vacuum pump includes a pumping controller, which is electrically connected to the first three-way valve and the second three-way valve respectively; the pumping controller is used to obtain interface opening and closing information from the first three-way valve and the second three-way valve, and adjust the pumping interface according to the interface opening and closing information. By electrically connecting the pumping controller to the first three-way valve and the second three-way valve respectively, the accuracy of the pumping process of the vacuum pump can be improved.
[0069] Among them, the flow rate of the first flow limiting valve and the second flow limiting valve can be set according to actual needs. By reasonably controlling the flow rate of the first flow limiting valve and the second flow limiting valve, the amount of oxygen extracted by the booster compressor can be equal to the amount of oxygen precipitated by the first molecular sieve tower and the second molecular sieve tower. The suction negative pressure of the vacuum pump, the suction negative pressure of the booster compressor, the suction speed of the vacuum pump and the suction speed of the booster compressor can be set according to actual needs. In order to improve the working stability of the molecular sieve oxygen production device, the suction negative pressure of the vacuum pump is equal to the suction negative pressure of the booster compressor. The ratio of the suction speed of the vacuum pump to the suction speed of the booster compressor is greater than 10.
[0070] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0071] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A molecular sieve oxygen production device, characterized in that: It includes a compressed air source, a first three-way valve, a first molecular sieve tower, a first flow limiting valve and a vacuum pump; The compressed air source includes a first interface and a second interface, the first three-way valve includes a third interface, a fourth interface and a fifth interface, the first molecular sieve tower includes a sixth interface and a seventh interface, the first limiting valve includes an eighth interface and a ninth interface, and the vacuum pump includes a tenth interface and an eleventh interface; The first interface is connected to the atmospheric environment, the second interface is connected to the third interface, the fourth interface is connected to the sixth interface, the seventh interface is connected to the eighth interface, the ninth interface is connected to the oxygen storage tank, the fifth interface is connected to the tenth interface, and the eleventh interface is connected to the atmospheric environment; The compressed air source is used to extract air through the first interface, compress the extracted air, and inject the compressed air into the third interface through the second interface; The first three-way valve is used to connect the third interface and the fourth interface, and close the fifth interface, obtain compressed air through the third interface, and inject compressed air into the sixth interface through the fourth interface; The first molecular sieve tower is used to obtain compressed air through the sixth interface, adsorb nitrogen in the compressed air, and inject oxygen in the compressed air into the eighth interface through the seventh interface; The first flow limiting valve is used to obtain oxygen through the eighth interface and inject the obtained oxygen into the oxygen storage tank through the ninth interface; The first three-way valve is also used to close the third interface and connect the fifth interface and the fourth interface when the internal air pressure of the first molecular sieve tower is equal to the air pressure injected into the third interface by the compressed air source; The vacuum pump is used to connect the tenth interface and the eleventh interface when the first three-way valve connects the fifth interface and the fourth interface, extract nitrogen inside the first molecular sieve tower through the tenth interface, and discharge the extracted nitrogen into the atmosphere through the eleventh interface; The first three-way valve is also used to connect the third interface and the fourth interface again and close the fifth interface when the internal air pressure of the first molecular sieve tower is less than a preset air pressure threshold.
2. The molecular sieve oxygen production device according to claim 1, characterized in that: It also includes a booster compressor, and the ninth interface is connected to the oxygen storage tank through the booster compressor; The booster compressor comprises a twelfth interface and a thirteenth interface, the ninth interface is connected to the twelfth interface, and the thirteenth interface is connected to the oxygen storage tank; The booster compressor is used to extract oxygen from the inside of the first molecular sieve tower through the twelfth interface, and inject the extracted oxygen into the oxygen storage tank through the thirteenth interface.
3. The molecular sieve oxygen production device according to claim 2, characterized in that: It also includes a second three-way valve, a second molecular sieve tower and a second flow limiting valve; The second three-way valve includes a fourteenth interface, a fifteenth interface and a sixteenth interface, the second molecular sieve tower includes a seventeenth interface and an eighteenth interface, the second flow limiting valve includes a nineteenth interface and a twentieth interface, and the vacuum pump also includes a twenty-first interface; The fourteenth interface is connected to the second interface, the fifteenth interface is connected to the seventeenth interface, the eighteenth interface is connected to the nineteenth interface, the twenty-th interface is connected to the twelfth interface, and the sixteenth interface is connected to the twenty-first interface; The compressed air source is further used to inject compressed air into the fourteenth interface through the second interface; The second three-way valve is used to close the sixteenth interface and connect the fourteenth interface and the fifteenth interface when the first three-way valve closes the third interface and connects the fifth interface and the fourth interface, obtain compressed air through the fourteenth interface, and inject compressed air into the seventeenth interface through the fifteenth interface; The second molecular sieve tower is used to obtain compressed air through the seventeenth interface, adsorb nitrogen in the compressed air, and inject oxygen in the compressed air into the nineteenth interface through the eighteenth interface; The second flow limiting valve is used to obtain oxygen through the nineteenth interface and inject the obtained oxygen into the twelfth interface through the twentieth interface; The booster compressor is also used to extract oxygen from the second molecular sieve tower through the twelfth interface, and inject the extracted oxygen into the oxygen storage tank through the thirteenth interface; The second three-way valve is also used to close the fourteenth interface and connect the fifteenth interface and the sixteenth interface when the internal air pressure of the second molecular sieve tower is equal to the air pressure injected into the fourteenth interface by the compressed air source; The first three-way valve is further used to connect the third interface and the fourth interface again and close the fifth interface when the second three-way valve closes the fourteenth interface and connects the fifteenth interface and the sixteenth interface; The vacuum pump is further used for connecting the eleventh interface and the twenty-first interface when the second three-way valve connects the fifteenth interface and the sixteenth interface, extracting nitrogen inside the second molecular sieve tower through the twenty-first interface, and discharging the extracted nitrogen into the atmosphere through the eleventh interface; The second three-way valve is also used to connect the fourteenth interface and the fifteenth interface again and close the sixteenth interface when the internal air pressure of the second molecular sieve tower is less than a preset air pressure threshold.
4. The molecular sieve oxygen production device according to claim 3, characterized in that: The vacuum pump is installed above the first molecular sieve tower and the second molecular sieve tower.
5. The molecular sieve oxygen production device according to claim 4, characterized in that: The booster compressor is installed below the first molecular sieve tower and the second molecular sieve tower.
6. The molecular sieve oxygen production device according to claim 5, characterized in that: The structure of the first molecular sieve tower is completely the same as that of the second molecular sieve tower.
7. The molecular sieve oxygen production device according to claim 6, characterized in that: A first pressure sensor is installed inside the first molecular sieve tower, and a second pressure sensor is installed inside the second molecular sieve tower; The first pressure sensor is electrically connected to the first three-way valve, and the second pressure sensor is electrically connected to the second three-way valve; The first pressure sensor is used to obtain internal air pressure data of the first molecular sieve tower, and send the obtained air pressure data to the first three-way valve; The second pressure sensor is used to obtain internal air pressure data of the second molecular sieve tower, and send the obtained air pressure data to the second three-way valve; The first three-way valve is used to open and close the interface according to the air pressure data sent by the first pressure sensor, and the second three-way valve is used to open and close the interface according to the air pressure data sent by the second pressure sensor.
8. The molecular sieve oxygen production device according to claim 7, characterized in that: The vacuum pump includes a pumping controller, and the pumping controller is electrically connected to the first three-way valve and the second three-way valve respectively; The air extraction controller is used to obtain interface opening and closing information from the first three-way valve and the second three-way valve, and adjust the air extraction interface according to the interface opening and closing information.