Liquid filtering and degassing device and additional cleaning device

Abstract

A liquid filtering and degassing device and an additional cleaning device comprise a filtering pump (1), a first tee joint (2), a two-way valve (3), a filter (4), a four-way joint (5), an air blowing pump (6), an infusion pump (7), a degassing lung (8), a liquid inlet (15), a liquid outlet (18) and a controller (11), the first tee joint (2) is connected with the filtering pump (1), the two-way valve (3) and the filter (4), and the four-way joint (5) is connected with the filter (4), the air blowing pump (6), the infusion pump (7) and the degassing lung (8). The additional cleaning device further comprises a cleaning bottle (22), a liquid adding pump (23), a third three-way valve (24), a quick connector female head (26), a quick connector male head (27) and a second controller (25), the liquid adding pump (23) is connected to the upper end of the cleaning bottle (22), the quick connector female head (26) is connected to the lower end of the cleaning bottle (22), the quick connector male head (27) is connected to a pipeline of a liquid outlet (18), and the second controller (25) is connected to the liquid outlet (18). The device has the advantages of high filtering speed, good degassing effect, high yield, thorough cleaning and the like.

Description

Technical Field

[0001] This invention relates to a liquid filtration and degassing device and an auxiliary cleaning device, belonging to the field of instrumentation, and particularly to a mobile phase filtration and degassing device for liquid chromatography. Background Technology

[0002] High-performance liquid chromatography (HPLC) is a separation and analysis technique characterized by using a liquid as the mobile phase. A typical HPLC system consists of a mobile phase reservoir, pump, injector, column, detector, and recorder. HPLC has a wide range of applications, spanning almost all fields of quantitative and qualitative analysis. It enables the effective separation of the target main component from various impurity components, and allows for the quantification of each component through the integration of the detector signal.

[0003] Analytical liquid chromatographs are highly precision instruments often used to analyze trace impurities. They have very high requirements for the mobile phase. If the mobile phase is contaminated or contains bubbles, it will increase baseline noise or produce ghost peaks, affecting the detection and quantification of impurities. Therefore, the mobile phase needs to be a clean mobile phase that has been filtered and degassed.

[0004] Currently, mobile phase filtration is mostly done manually using vacuum filtration flasks. This method is cumbersome and slow. Vacuum filtration often results in the removal of volatile organic phases (such as methanol, acetonitrile, etc.) or pH adjusters (such as triethylamine, trifluoroacetic acid, etc.), causing changes in the mobile phase ratio and affecting the analytical results. After filtration, additional ultrasonic degassing is required, which generates significant noise pollution. Cleaning the vacuum filtration flask after filtration is also quite cumbersome, often requiring multiple rinses with tap water, cleaning with purified water, and repeated vacuum filtration with purified water to thoroughly clean the filter screen. After cleaning, the flask is then dried for future use. Summary of the Invention

[0005] In view of the above-mentioned defects of existing processing methods, the purpose of this invention is to provide a mobile phase filtration device and an additional cleaning device, which has the advantages of rapid filtration, good degassing effect, no loss of volatile components, high filtration yield, efficient and thorough cleaning, low residue, and high degree of automation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A liquid filtration and degassing device (such as...) Figure 1As shown), it includes a filter pump (1), a first three-way valve (2), a two-way valve (3), a filter (4), a four-way valve (5), an air pump (6), a liquid pump (7), a degassed lung (8), and a controller (11). The first three-way valve (2) connects the filter pump (1), the two-way valve (3), and the filter (4). The four-way valve (5) connects the filter (4), the air pump (6), the liquid pump (7), and the degassed lung (8). The controller (11) performs rinsing, filtration and degassed, cleaning, and evacuation operations according to the user-set program.

[0008] Preferably, a liquid filtration degassing device (e.g., capable of thoroughly purging degassing lungs) is used. Figure 3 As shown), it includes a filter pump (1), a first three-way valve (2), a two-way valve (3), a filter (4), a four-way valve (5), an air pump (6), a liquid pump (7), a degassing lung (8), a fourth three-way valve (20), a second three-way valve (21), and a controller (11). The first three-way valve (2) connects the filter pump (1), the two-way valve (3), and the filter (4). The four-way valve (5) connects the filter (4), the second three-way valve (21), the liquid pump (7), and the degassing lung (8). The fourth three-way valve (20) connects the air pump (6), the degassing lung (8), and the second three-way valve (21). During normal filtration and degassing, the liquid flows from bottom to top through the degassing lung, filling it and improving the degassing effect. During drainage, the air pump blows air from top to bottom to fully drain the liquid from the degassing lung. The controller (11) performs rinsing, filtration and degassing, cleaning, and emptying operations according to the user-set program.

[0009] Preferably, the first three-way valve (2) and the two-way valve (3) of the liquid filtration degassing device can be replaced by a single three-way valve.

[0010] Preferably, the liquid filtration degassing device further includes a pressure sensor (12), which is located between the filter pump (1) and the first tee (2). The pressure sensor (12) can monitor the filtration pressure, enable the device to operate in constant pressure mode and constant speed mode, and check the integrity of the filter membrane before and after filtration.

[0011] Preferably, the liquid filtration degassing device further includes a second degassing lung (13), which is located after the degassing lung (8), thereby improving the degassing effect through the cascade of two degassing lungs.

[0012] Preferably, the outlet of the degassed lung (8) is lower than the inlet of the second degassed lung (13), so that the residual liquid in the two degassed lungs can be drained when the pump is working.

[0013] Preferably, the liquid filtration degassing device further includes one or more additional degassing lungs, and the degassing effect is further improved by cascading multiple degassing lungs.

[0014] Preferably, the liquid filtration degassing device further includes a first three-way valve (14), which is located before the filter pump (1) and is used to select the solution to be filtered and air. The solution to be filtered is selected for performing solution filtration, and air is selected for pressurization and pressure holding tests for filter membrane integrity testing.

[0015] Preferably, the liquid filtration and degassing device also has installation orientation requirements. The four-way valve (5) is located at a low point, lower than the filter (4) and the degassing lung (8). The liquid pump (7) is lower than the four-way valve (5). After filtration, the liquid pump (7) can pump out the residual liquid in the system, reduce system residue, and improve cleaning efficiency.

[0016] Preferably, the filter pump (1) is a peristaltic pump that can perform forward and reverse rotation, thereby achieving forward filtration during filtration and alternating forward and reverse rinsing during cleaning to achieve efficient cleaning.

[0017] Preferably, the pump tube used in the filter pump (1) is a PTFE-lined tube, so that the material in contact with the liquid is a completely inert material.

[0018] Preferably, after filtration is completed, the air pump (6) operates to blow out the residual liquid in the system, thereby increasing the yield.

[0019] Preferably, during the cleaning operation, firstly, the filter pump (1) performs reverse cleaning, secondly, the filter pump (1) performs forward cleaning, then the air pump (6) performs bubbling cleaning, and finally, the liquid pump (7) removes the cleaning liquid and dries the liquid in the system. This process is repeated alternately, and efficient cleaning can be achieved with a small amount of cleaning liquid.

[0020] Preferably, in normal filtration and degassing operation, the second three-way valve (21) is connected to the fourth three-way valve (20) of the liquid filtration and degassing device, and the liquid in the degassing lung that has been filtered and degassed is discharged through the liquid outlet (18). When filtration and purging are completed, the second three-way valve (21) is connected to the four-way valve (5), and the air pump (6) is working to blow gas into the degassing lung (8), and then through the four-way valve (5), the second three-way valve (21), and then to the liquid outlet (18) for discharge. This can greatly reduce the residual liquid in the system, improve the yield, and reduce the residue.

[0021] Preferably, the liquid filtration device further includes an additional cleaning device (such as...). Figure 5As shown), it includes a cleaning bottle (22), a liquid pump (23), a third three-way valve (24), a quick-connect female connector (26), a quick-connect male connector (27), and a second controller (25). The liquid pump (23) is connected to the upper end of the cleaning bottle (22), the quick-connect female connector (26) is connected to the lower end of the cleaning bottle (22), and the quick-connect male connector (27) is connected to the outlet (18) pipeline. The third three-way valve (24) can select one of cleaning liquid A (28) and cleaning liquid B (29). The inlet (15) pipeline is inserted into the cleaning bottle from the upper opening to the bottom. The second controller (25) can realize the addition and replenishment of cleaning liquid A and cleaning liquid B in different proportions.

[0022] Preferably, the controller (11) and the second controller (25) work together. When cleaning is performed after preparation, it is only necessary to insert the inlet (15) pipe into the cleaning bottle (22) and the outlet (18) pipe into the quick connector (26) to perform cleaning with one click. First, the second controller (25) controls the liquid pump (23) to add cleaning liquid and rinse the outer wall of the inlet (15) pipe. After adding a specified amount of cleaning liquid, the controller (11) controls the filter pump (1) to perform reverse cleaning. Second, the filter pump (1) performs forward cleaning. During forward cleaning, as the liquid is sucked into the interior of the filter degassing device, the second controller (25) controls the liquid pump (23) to replenish the liquid in time to form a full circulation. Then, the air pump (6) performs bubbling cleaning. This is repeated many times. Finally, the liquid pump (7) removes the cleaning liquid and dries the liquid in the system. In this way, cleaning with different proportions of cleaning liquid can be performed many times. Beneficial effects

[0023] (1) The present invention can complete filtration and degassing continuously in one go, with fast filtration speed (up to 600 mL / min) and good degassing effect (dissolved oxygen content is less than 5 ppm).

[0024] (2) The present invention uses positive pressure filtration, so that the volatile components of the mobile phase are not lost and the composition of the mobile phase remains unchanged during preparation.

[0025] (3) The present invention can perform filter membrane integrity checks before and after filtration, ensuring that the user's mobile phase is properly filtered, avoiding consequences such as filter membrane damage causing blockage of the liquid chromatograph.

[0026] (4) The present invention has a high yield. By blowing out the residual mobile phase in the system with an air pump, the loss of the present invention is only about 30 mL.

[0027] (5) The present invention has high cleaning efficiency and low residue. The residual liquid in the system is drained by a pump located at the lowest point, achieving efficient cleaning and drying. Only 1000mL of water is needed to achieve a residue level of less than one ten-thousandth.

[0028] (6) This invention is easy to use. It can perform preparation by filtering and degassing with one click. After preparation, the inlet and outlet tubes are inserted and the program is automatically cleaned. It can also clean all surfaces that come into contact with the sample (including the outer surface of the inlet tube). Attached Figure Description

[0029] Figure 1 This is a schematic diagram of Embodiment 1 of the liquid filtration and degassing device of the present invention.

[0030] In the diagram: 1. Filter pump, 2. First tee, 3. Two-way valve, 4. Filter, 5. Four-way valve, 6. Air pump, 7. Liquid pump, 8. Degassing lung, 11. Controller, 15. Liquid inlet, 17. Waste liquid outlet, 18. Liquid outlet, 19. Vacuum pump.

[0031] Figure 2 This is a schematic diagram of Embodiment 2 of the liquid filtration and degassing device of the present invention.

[0032] In the diagram: 1. Filter pump, 2. First tee, 3. Two-way valve, 4. Filter, 5. Four-way valve, 6. Air pump, 7. Liquid pump, 8. Degassing lung, 9. Second tee, 10. Third tee, 11. Controller, 12. Pressure sensor, 13. Second degassing lung, 14. First tee valve, 15. Liquid inlet, 16. Air, 17. Waste liquid outlet, 18. Liquid outlet, 19. Vacuum pump.

[0033] Figure 3 This is a schematic diagram of Embodiment 3 of the liquid filtration and degassing device of the present invention.

[0034] In the diagram: 1. Filter pump, 2. First tee, 3. Two-way valve, 4. Filter, 5. Four-way valve, 6. Air pump, 7. Liquid pump, 8. Degassing lung, 11. Controller, 15. Liquid inlet, 17. Waste liquid outlet, 18. Liquid outlet, 19. Vacuum pump, 20. Fourth tee, 21. Second tee valve.

[0035] Figure 4 This is a schematic diagram of Embodiment 4 of the liquid filtration and degassing device of the present invention.

[0036] In the diagram: 1. Filter pump, 2. First tee, 3. Two-way valve, 4. Filter, 5. Four-way valve, 6. Air pump, 7. Liquid pump, 8. Degassing lung, 9. Second tee, 10. Third tee, 11. Controller, 12. Pressure sensor, 13. Second degassing lung, 14. First tee valve, 15. Liquid inlet, 16. Air, 17. Waste liquid outlet, 18. Liquid outlet, 19. Vacuum pump, 20. Fourth tee, 21. Second tee valve.

[0037] Figure 5 This is a schematic diagram of embodiment 5 of the liquid filtration and degassing device of the present invention, which is an additional cleaning device.

[0038] In the diagram: 15, inlet; 18, outlet; 22, cleaning bottle; 23, liquid pump; 24, third three-way valve; 25, second controller; 26, quick-connect female connector; 27, quick-connect male connector; 28, cleaning solution A; 29, cleaning solution B. Detailed Implementation

[0039] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Example 1

[0040] like Figure 1 As shown, a liquid filtration and degassing device (such as...) Figure 1 As shown), it includes a filter pump, a first three-way valve, a two-way valve, a filter, a four-way valve, an air pump, a liquid pump, a degaussing lung, and a controller.

[0041] The operating procedure of the liquid filtration and degassing device is as follows:

[0042] Pre-venting: The two-way valve (3) is opened, the filter pump (1) works in the forward direction, draws up the liquid to be filtered, and discharges the gas in the pipeline.

[0043] Rinsing: The two-way valve (3) is closed, the filter pump (1) works in the forward direction, so that the solution passes through the filter (4), four-way valve (5), degassing lung (8) to rinse the pipeline, and the discharged liquid is used to rinse the solution receiving container.

[0044] Filtration and degassing: First, pre-evacuate to the set threshold and maintain it. Then, the two-way valve (3) is closed, the filter pump (1) works in the forward direction, and the solution passes through the filter (4), four-way valve (5), and degassing lung (8) to continuously filter and degas and discharge into the solution receiving container.

[0045] Tail blowing: After filtration and degassing are completed, the vacuum is released, the filter pump (1) stops, and the blow pump (6) starts to blow the residual solution in the system into the solution receiving container to improve the yield.

[0046] The system is drained: the pump (7) operates to extract a small amount of residual liquid in the system to waste liquid. The pump (7) stops and remains for a period of time. The pump (7) then operates again. This process is repeated to drain the system.

[0047] Cleaning: When the two-way valve (3) is closed, firstly, the filter pump (1) works in reverse to clean the system in reverse. Secondly, the filter pump (1) works in the forward direction to clean the system in the forward direction. Then, the air pump (6) works to perform bubbling cleaning on the degassed lungs. Finally, the liquid pump (7) works to drain the system. This process is repeated to perform cyclic cleaning.

[0048] Drainage: First, the two-way valve (3) is opened, the filter pump (1) works in the forward direction to drain the front pipeline, and then the liquid pump (7) works to drain the rear pipeline. This process is repeated to perform multiple drainage cycles. Example 2

[0049] like Figure 2 As shown, a liquid filtration and degassing device (such as...) Figure 2 As shown), it includes a filter pump, a first three-way valve, a two-way valve, a filter, a four-way valve, an air pump, a liquid pump, a degaussing lung, a second three-way valve, a third three-way valve, a controller, a pressure sensor, a second degaussing lung, and a first three-way valve.

[0050] The operating procedure of the liquid filtration and degassing device is as follows:

[0051] Pre-venting: The three-way valve (14) is opened to allow the solution to be filtered to pass through, the two-way valve (3) is opened, the filter pump (1) operates in the forward direction, and the liquid to be filtered is drawn up and the gas in the pipeline is discharged.

[0052] Rinsing: The three-way valve (14) is opened to allow the solution to be filtered, the two-way valve (3) is closed, the filter pump (1) is turned on in the forward direction, so that the solution passes through the filter (4), four-way valve (5), deaerator (8), second deaerator (13) to rinse the pipeline, and the discharged liquid is used to rinse the solution receiving container.

[0053] Pre-filtration membrane integrity test: Air is introduced through the three-way valve (14), the two-way valve (3) is closed, the filter pump (1) works in the forward direction, and air is forced into the filter (4). If the pressure can reach the set threshold and be maintained for a set time (pressure maintenance), the filter membrane is considered to be intact; otherwise, the filter membrane is considered to be damaged.

[0054] Filtration and degassing: First, pre-evacuate to the set threshold and maintain it. Then, the three-way valve (14) is opened to allow the solution to be filtered, the two-way valve (3) is closed, the filter pump (1) works in the forward direction, and the solution passes through the filter (4), four-way valve (5), degassing lung (8) and second degassing lung (13) to be continuously filtered, degassed and discharged into the solution receiving container.

[0055] Tail blowing: After filtration and degassing are completed, the vacuum is released, the filter pump (1) stops, and the blow pump (6) starts to blow the residual solution in the system into the solution receiving container to improve the yield.

[0056] Filter membrane integrity test after filtration: the three-way valve (14) is opened to allow air, the two-way valve (3) is closed, the filter pump (1) is turned on to pressurize the air into the filter (4). If the pressure can reach the set threshold and be maintained for a set time (pressure maintenance), the filter membrane is considered to be intact; otherwise, the filter membrane is considered to be damaged.

[0057] The system is drained: the pump (7) operates to extract a small amount of residual liquid in the system to waste liquid. The pump (7) stops and remains for a period of time. The pump (7) then operates again. This process is repeated to drain the system.

[0058] Cleaning: The three-way valve (14) is opened to the liquid inlet, and the two-way valve (3) is closed. First, the filter pump (1) works in reverse to clean the system in reverse. Second, the filter pump (1) works in the forward direction to clean the system in the forward direction. Then, the air pump (6) works to perform bubbling cleaning on the degassed lungs. Finally, the liquid pump (7) works to drain the system. This process is repeated to perform cyclic cleaning.

[0059] Emptying: First, the three-way valve (14) is connected to the inlet, the two-way valve (3) is opened, the filter pump (1) works in the forward direction to empty the front pipeline, and then the liquid pump (7) works to empty the back pipeline. This process is repeated to perform multiple emptying cycles. Example 3

[0060] like Figure 3 As shown, a liquid filtration and degassing device (such as...) Figure 3 As shown), it includes a filter pump, a first three-way valve, a two-way valve, a filter, a four-way valve, an air pump, a liquid pump, a degassing lung, a fourth three-way valve, a second three-way valve, and a controller.

[0061] The operating procedure of the liquid filtration and degassing device is as follows:

[0062] Pre-venting: The two-way valve (3) is opened, the filter pump (1) works in the forward direction, draws up the liquid to be filtered, and discharges the gas in the pipeline.

[0063] Rinsing: The second three-way valve (21) is connected to the fourth three-way valve (20), the two-way valve (3) is closed, the filter pump (1) is working in the forward direction, so that the solution passes through the filter (4), four-way valve (5), deaerator (8), fourth three-way valve (20) and second three-way valve (21) to rinse the pipeline, and the discharged liquid is used to rinse the solution receiving container.

[0064] Filtration and degassing: First, pre-evacuate to the set threshold and maintain it. Then, the second three-way valve (21) opens the fourth three-way valve (20), the two-way valve (3) closes, the filter pump (1) works in the forward direction, and the solution passes through the filter (4), four-way valve (5), degassing lung (8), fourth three-way valve (20) and second three-way valve (21). The solution enters the degassing lung from bottom to top, is continuously filtered and degassed, and discharged into the solution receiving container.

[0065] Tail-blowing: After filtration and degassing are completed, the vacuum is released, the filter pump (1) stops, the second three-way valve (21) is connected to the four-way valve (5), the blow pump (6) works, and blows the residual solution in the degassed lung and pipeline from top to bottom into the solution receiving container to improve the yield.

[0066] The system is drained: the pump (7) operates to extract a small amount of residual liquid in the system to waste liquid. The pump (7) stops and remains for a period of time. The pump (7) then operates again. This process is repeated to drain the system.

[0067] Cleaning: When the two-way valve (3) is closed, firstly, the filter pump (1) works in reverse to clean the system in reverse. Secondly, the filter pump (1) works in the forward direction to clean the system in the forward direction. Then, the second three-way valve (21) is connected to the four-way valve (5), and the air pump (6) works to perform bubbling cleaning on the degassed lungs. Finally, the liquid pump (7) works to drain the system. This process is repeated to perform cyclic cleaning.

[0068] Emptying: First, the two-way valve (3) is opened, the filter pump (1) works in the forward direction to empty the front pipeline. Then, the second three-way valve (21) is connected to the four-way valve (5), the air pump (6) works, and the liquid pump (7) works at the same time to empty the back pipeline. This process is repeated to perform multiple emptying cycles. Example 4

[0069] like Figure 4 As shown, a liquid filtration and degassing device (such as...) Figure 4 As shown), it includes a filter pump, a first three-way valve, a two-way valve, a filter, a four-way valve, an air pump, a liquid pump, a degaussing lung, a second three-way valve, a third three-way valve, a controller, a pressure sensor, a second degaussing lung, a first three-way valve, a fourth three-way valve, and a second three-way valve.

[0070] The operating procedure of the liquid filtration and degassing device is as follows:

[0071] Pre-venting: The three-way valve (14) is opened to allow the solution to be filtered to pass through, the two-way valve (3) is opened, the filter pump (1) operates in the forward direction, and the liquid to be filtered is drawn up and the gas in the pipeline is discharged.

[0072] Rinsing: The three-way valve (14) is opened to allow the solution to be filtered, the two-way valve (3) is closed, the filter pump (1) is turned on in the forward direction, so that the solution passes through the filter (4), four-way valve (5), deaerator (8), second deaerator (13), fourth three-way valve (20) and second three-way valve (21) to rinse the pipeline, and the discharged liquid is used to rinse the solution receiving container.

[0073] Pre-filtration membrane integrity test: Air is introduced through the three-way valve (14), the two-way valve (3) is closed, the filter pump (1) works in the forward direction, and air is forced into the filter (4). If the pressure can reach the set threshold and be maintained for a set time (pressure maintenance), the filter membrane is considered to be intact; otherwise, the filter membrane is considered to be damaged.

[0074] Filtration and degassing: First, pre-evacuate to the set threshold and maintain it. Then, the second three-way valve (21) opens the fourth three-way valve (20), the three-way valve (14) opens the solution to be filtered, the two-way valve (3) closes, the filter pump (1) works in the forward direction, and the solution passes through the filter (4), four-way valve (5), degassing lung (8), second degassing lung (13), fourth three-way valve (20) and second three-way valve (21). The solution enters the degassing lung from bottom to top, is continuously filtered and degassed and discharged into the solution receiving container.

[0075] Tail-blowing: After filtration and degassing are completed, the vacuum is released, the filter pump (1) stops, the second three-way valve (21) is connected to the four-way valve (5), the blow pump (6) works, and blows the residual solution in the degassed lung and pipeline from top to bottom into the solution receiving container to improve the yield.

[0076] Filter membrane integrity test after filtration: the three-way valve (14) is opened to allow air, the two-way valve (3) is closed, the filter pump (1) is turned on to pressurize the air into the filter (4). If the pressure can reach the set threshold and be maintained for a set time (pressure maintenance), the filter membrane is considered to be intact; otherwise, the filter membrane is considered to be damaged.

[0077] The system is drained: the pump (7) operates to extract a small amount of residual liquid in the system to waste liquid. The pump (7) stops and remains for a period of time. The pump (7) then operates again. This process is repeated to drain the system.

[0078] Cleaning: The three-way valve (14) is connected to the inlet, and the two-way valve (3) is closed. First, the filter pump (1) works in reverse to clean the system in reverse. Second, the filter pump (1) works in the forward direction to clean the system in the forward direction. Then, the second three-way valve (21) is connected to the four-way valve (5), and the air pump (6) works to perform bubbling cleaning on the degassed lung. Finally, the liquid pump (7) works to drain the system. This process is repeated to perform cyclic cleaning.

[0079] Emptying: First, the three-way valve (14) is connected to the inlet, the two-way valve (3) is opened, the filter pump (1) works in the forward direction to empty the front pipeline, and then the liquid pump (7) works to empty the back pipeline. This process is repeated to perform multiple emptying cycles. Example 5

[0080] like Figure 5 As shown, a liquid filtration and degassing device and an auxiliary cleaning device (such as...) Figure 5 As shown in the figures, the liquid filtration and degassing device is as described in Examples 1 to 4. The additional cleaning device also includes a cleaning bottle, a liquid pump, a third three-way valve, a second controller, a female quick-connect connector, and a male quick-connect connector.

[0081] The operating procedure of the additional cleaning device is as follows:

[0082] The controller (11) and the second controller (25) work together. When cleaning is performed after preparation, the inlet (15) pipe is inserted into the cleaning bottle (22), and the outlet (18) pipe is inserted into the quick connector (26). Cleaning is performed with one button. First, the second controller (25) controls the liquid pump (23) to add cleaning liquid and rinses the outer wall of the inlet (15) pipe. After adding a specified amount of cleaning liquid, the controller (11) controls the filter pump (1) to perform reverse cleaning. Second, the filter pump (1) performs forward cleaning. During forward cleaning, as the liquid is sucked into the interior of the filter degassing device, the second controller (25) controls the liquid pump (23) to replenish the liquid in time to form a full circulation. Then, the air pump (6) performs bubbling cleaning. This is repeated many times. Finally, the liquid pump (7) removes the cleaning liquid and dries the liquid in the system. In this way, cleaning with different proportions of cleaning liquid can be performed many times.

Claims

1. A liquid filtration and degassing device, characterized in that: It includes a filter pump (1), a first three-way valve (2), a two-way valve (3), a filter (4), a four-way valve (5), an air pump (6), a liquid pump (7), a deaerator (8), an inlet (15), an outlet (18), and a controller (11). The first three-way valve (2) connects the filter pump (1), the two-way valve (3), and the filter (4). The four-way valve (5) connects the filter (4), the air pump (6), the liquid pump (7), and the deaerator (8).

2. A liquid filtration and degassing device, characterized in that: The system includes a filter pump (1), a first three-way valve (2), a two-way valve (3), a filter (4), a four-way valve (5), an air pump (6), a liquid pump (7), a deaerator (8), a fourth three-way valve (20), a second three-way valve (21), an inlet (15), an outlet (18), and a controller (11). The first three-way valve (2) connects the filter pump (1), the two-way valve (3), and the filter (4). The four-way valve (5) connects the filter (4), the second three-way valve (21), the liquid pump (7), and the deaerator (8). The fourth three-way valve (20) connects the air pump (6), the deaerator (8), and the second three-way valve (21).

3. A liquid filtration and degassing device according to claim 1 or 2, characterized in that: The liquid filtration degassing device also includes a pressure sensor (12), which is located between the filter pump (1) and the first tee (2) to monitor the filtration pressure and to check the integrity of the filter membrane before and after filtration.

4. A liquid filtration and degassing device according to any one of claims 1-3, characterized in that: The liquid filtration degassing device also includes a second degassing lung (13), which is located after the degassing lung (8), thereby improving the degassing effect through the cascade of two degassing lungs.

5. A liquid filtration and degassing device according to any one of claims 1-4, characterized in that: The liquid filtration degassing device also includes multiple additional degassing lungs, which further improve the degassing effect through multiple degassing lung cascades.

6. A liquid filtration and degassing device according to any one of claims 1-5, characterized in that: The liquid filtration and degassing device also includes a three-way valve (14), which is located before the filter pump (1) and is used to select the solution to be filtered and air.

7. A liquid filtration and degassing device according to any one of claims 1-6, characterized in that: The liquid filtration and degassing device also has installation orientation requirements, with the four-way valve (5) located at a low point, lower than the filter (4) and the degassing lung (8), and the liquid pump (7) lower than the four-way valve (5).

8. A liquid filtration and degassing device according to claim 2, characterized in that: The outlet of the degassed lung (8) is lower than the inlet of the second degassed lung (13).

9. An auxiliary cleaning device for a liquid filtration and degassing apparatus, characterized in that: It includes the liquid filtration and degassing device as described in claim 1 or 2, and further includes a cleaning bottle (22), a liquid pump (23), a third three-way valve (24), a quick-connect female connector (26), a quick-connect male connector (27), and a second controller (25). The liquid pump (23) is connected to the upper end of the cleaning bottle (22), the quick-connect female connector (26) is connected to the lower end of the cleaning bottle (22), the quick-connect male connector (27) is connected to the outlet (18) pipeline, the third three-way valve (24) can select one of cleaning liquid A (28) and cleaning liquid B (29), and the inlet (15) pipeline is inserted from the upper opening into the cleaning bottle to the bottom.

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