Liquid path bubble removing device and liquid path bubble removing method

Abstract

This invention provides a liquid-channel degassing device and method. The degassing device includes: a cleaning liquid tank for holding the cleaning liquid; a cleaning liquid buffer tank, which is a closed tank connected to the cleaning liquid tank; the cleaning liquid buffer tank is equipped with an air extraction pipe and a liquid delivery pipe; a switch and a pumping device, the pumping device being connected to either the air extraction pipe or the liquid delivery pipe via the switch. In this solution, a negative pressure is generated inside the cleaning liquid buffer tank, causing the cleaning liquid in the cleaning liquid tank to continuously flow into the cleaning liquid buffer tank. Simultaneously, air bubbles in the cleaning liquid are precipitated under the action of the negative pressure and accumulate in the upper part of the cavity of the cleaning liquid buffer tank. The cleaning liquid in the lower part of the cavity effectively removes the air bubbles, thereby ensuring the accuracy of the sample dosage. This invention is simple to use, occupies little space, has high reliability, significantly removes air bubbles, and has lower manufacturing costs.

Description

Technical Field

[0001] This invention relates to the field of analytical instrument technology, and in particular to a liquid flow degassing device and method. Background Technology

[0002] In sample analyzers, especially chemiluminescence immunoassay analyzers, to ensure the accuracy of test results, the accuracy of the sample volume must be ensured first during the sample loading process.

[0003] However, bubbles often form in the mobile phase solution within the instrument's liquid circuit system due to dissolved oxygen or air mixing, which can affect the accuracy of the sample loading.

[0004] In existing technologies, to remove air bubbles from liquid systems, commercially available degassing membrane devices are often used. The basic principle is that the degassing membrane contains numerous hollow fibers with tiny pores on their walls. Water molecules cannot pass through these pores, but gas molecules can. During operation, water flows through the hollow fibers under pressure, while a vacuum pump continuously draws away gas from the outside of the fibers, creating a negative pressure. This causes gas in the water to continuously escape through the hollow fibers, thus achieving the purpose of removing gas from the water. The main drawbacks are twofold: firstly, the cost is too high, and secondly, the degassing device occupies a large amount of internal space in the instrument.

[0005] The current basic process for removing air bubbles from liquid lines involves first emptying the liquid from the lines, then letting it stand for a certain period of time to allow any remaining air bubbles to burst and form a water film. Finally, the lines are filled with air-free liquid. The drawbacks of this technique are that the process requires a long stand-up period, resulting in low efficiency. Furthermore, if air bubbles are present in the liquid within the container, this method cannot remove them, making its application conditions too ideal and its reliability low. Summary of the Invention

[0006] In view of this, the object of one or more embodiments of the present invention is to provide a liquid degassing device and a liquid degassing method to improve the degassing effect of cleaning fluid.

[0007] In a first aspect, a liquid path degassing device is provided, the liquid path degassing device comprising:

[0008] A cleaning solution container is used to hold the cleaning solution.

[0009] A cleaning fluid buffer tank is a closed tank that is connected to a cleaning fluid container. The cleaning fluid buffer tank is equipped with an exhaust pipe for adsorbing gas inside the tank and a delivery pipe for extracting cleaning fluid from the tank.

[0010] A switching switch and a pumping device, wherein the pumping device is connected to either the air extraction pipe or the liquid delivery pipe via the switching switch.

[0011] In the above solution, a negative pressure is generated within the cleaning solution buffer tank. This negative pressure causes the cleaning solution in the cleaning solution tank to continuously flow into the buffer tank. Simultaneously, air bubbles in the cleaning solution are precipitated under the negative pressure and accumulate in the upper part of the buffer tank's cavity. The cleaning solution in the lower part of the cavity effectively removes the air bubbles, thus ensuring the accuracy of the sample dosage. This invention is simple to use, occupies little space, has high reliability, significantly removes air bubbles, and has lower manufacturing costs.

[0012] In one specific implementation, the switching switch is a two-position three-way valve; the normally closed port of the two-position three-way valve is connected to the air extraction pipe; and the normally open port of the two-position three-way valve is connected to the liquid delivery pipe.

[0013] The common port of the two-position three-way valve is connected to the pumping device.

[0014] In one specific implementation, the pumping device includes a diaphragm pump and a plunger pump in communication with the diaphragm pump; wherein,

[0015] The diaphragm pump is connected to the common port of the two-position three-way valve.

[0016] In one specific implementation, a sampling needle is also included, which is in communication with the plunger pump.

[0017] In one specific implementation, a level float switch is further provided in the cleaning fluid buffer tank; the level float switch is used to control the switching switch to switch.

[0018] When the liquid level float switch is turned on, the pumping device is connected to the air extraction pipe through the switching switch.

[0019] In one specific implementation, the liquid delivery pipe is located on the bottom wall or side wall of the cleaning fluid buffer tank, near the bottom wall.

[0020] In one specific implementation, the suction pipe is located on the top or side wall of the cleaning fluid buffer tank, near the top wall.

[0021] In one specific feasible implementation, when a sampling needle is included...

[0022] It also includes a needle cleaning pool located below the sampling needle.

[0023] In one specific implementation, a waste liquid tank connected to the needle cleaning tank is also included.

[0024] In one specific implementation, the level float switch is suspended inside the top wall of the cleaning fluid buffer tank.

[0025] Secondly, a method for removing air bubbles from a liquid path is also provided, the method comprising the following steps:

[0026] Purge the gas from the cleaning fluid buffer tank and fill it with cleaning fluid;

[0027] Fill the delivery tube between the cleaning fluid buffer tank and the sampling needle with cleaning fluid;

[0028] The cleaning solution is pumped from the cleaning solution buffer tank to the syringe and sampling needle through a pumping device. The pumping device also generates negative pressure in the cleaning solution buffer tank. The negative pressure causes the cleaning solution in the cleaning solution tank to flow continuously into the cleaning solution buffer tank. Under the action of negative pressure, the air bubbles in the cleaning solution are precipitated and gather in the upper part of the cavity of the cleaning solution buffer tank.

[0029] In the above solution, a negative pressure is generated within the cleaning solution buffer tank. This negative pressure causes the cleaning solution in the cleaning solution tank to continuously flow into the buffer tank. Simultaneously, air bubbles in the cleaning solution are precipitated under the negative pressure and accumulate in the upper part of the buffer tank's cavity. The cleaning solution in the lower part of the cavity effectively removes the air bubbles, thus ensuring the accuracy of the sample dosage. This invention is simple to use, occupies little space, has high reliability, significantly removes air bubbles, and has lower manufacturing costs.

[0030] In one specific implementation, the pumping device is connected to the air extraction pipe by switching on a switch to expel the air from the cleaning fluid buffer tank and replenish it with cleaning fluid.

[0031] In one specific implementation scheme, the delivery tube between the cleaning fluid buffer tank and the sampling needle is filled with cleaning fluid; specifically including:

[0032] The pumping device is connected to the liquid delivery pipe by switching on the switch, and the liquid delivery pipe is filled with cleaning fluid by the pumping device.

[0033] In one specific implementation, the method further includes: when the cleaning fluid in the cleaning fluid buffer tank is lower than the level float switch, the level float switch controls the pipe-cutting switch to switch, the air extraction pipe is connected to the pumping device, and negative pressure is applied to the cleaning fluid buffer tank. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in one or more embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A schematic diagram of the structure of the liquid circuit degassing device provided in an embodiment of this application is shown;

[0036] Figure 2 A flowchart of the liquid circuit degassing method provided in an embodiment of this application is shown.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Cleaning solution tank;

[0039] 2. Cleaning fluid buffer tank;

[0040] 3. Liquid level float switch;

[0041] 4. Solenoid valve;

[0042] 5. Diaphragm pump;

[0043] 6. Integrated plunger pump;

[0044] 7. Sampling needle;

[0045] 8. Needle cleaning tank;

[0046] 9. Waste liquid tank. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0048] The invention will be further described in detail below with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the invention will become clearer and more apparent.

[0049] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0050] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0051] To facilitate understanding of the liquid path degassing device involved in the embodiments of this application, its application scenario is first described. The liquid path degassing device provided in the embodiments of this application is used to remove air bubbles in a liquid path system. Existing degassing methods use commercially available degassing membrane devices in the liquid path system, but existing degassing membrane devices have a relatively large structural volume. Therefore, the embodiments of this application provide a liquid path degassing device to reduce the occupied volume. A detailed description is given below with reference to specific drawings and embodiments.

[0052] like Figure 1 As shown in the figure, this application provides a liquid degassing device. The main structure of the liquid degassing device includes: a cleaning liquid tank 1, a cleaning liquid buffer tank 2, a switching switch 4, and a pumping device. The cleaning liquid tank 1, the cleaning liquid buffer tank 2, the switching switch 4, and the pumping device form a liquid path for transporting the cleaning liquid and removing air bubbles from it. Each part is described in detail below.

[0053] First, let's introduce the cleaning fluid tank 1. This tank is used to hold cleaning fluid, which is used to clean the inner wall of the sampling needle 7. In this embodiment, the cleaning fluid tank 1 includes a tank body and a cover that fits over the tank body. Additionally, a delivery tube is inserted through the cover and into the tank body to draw out the cleaning fluid placed inside the tank 1.

[0054] The cleaning fluid buffer tank 2 is also a device for holding cleaning fluid. The cleaning fluid buffer tank 2 is connected to the cleaning fluid tank 1 and is used to hold the cleaning fluid drawn from the cleaning fluid tank 1. The extraction method is as follows: a pumping device pumps the cleaning fluid through a delivery pipe from the bottom of the cleaning fluid buffer tank to the syringe 6 and sampling needle 7. During this process, a negative pressure is generated inside the cleaning fluid buffer tank 2, which causes the cleaning fluid in the cleaning fluid tank 1 to continuously flow into the cleaning fluid buffer tank 2.

[0055] In addition, in this embodiment, the cleaning fluid buffer tank 2 also serves as a de-airing device. The cleaning fluid buffer tank 2 is a closed tank and is used in conjunction with the switching device and the pumping device to de-air the stored cleaning fluid. The de-airing process is as follows: during the replenishment of cleaning fluid to the cleaning fluid buffer tank 2, air bubbles in the cleaning fluid are precipitated under negative pressure and accumulate in the upper part of the cavity of the cleaning fluid buffer tank 2, while the cleaning fluid in the lower part of the cavity effectively removes the air bubbles.

[0056] The cleaning fluid buffer tank 2 is equipped with an exhaust pipe for discharging gas from the cleaning fluid buffer tank 2 and a delivery pipe for extracting cleaning fluid from the cleaning fluid buffer tank 2; in addition, the cleaning buffer tank is also connected to the aforementioned delivery pipe.

[0057] As described above, the cleaning fluid buffer tank 2 has three ports. The upper port connects to the evacuation pipe, which is used to empty the cleaning fluid buffer tank 2. The right-side port connects to the delivery pipe, which is used to replenish the buffer tank with cleaning fluid. The lower port connects to the liquid delivery pipe, which is used to pump the cleaning fluid.

[0058] As an optional solution, the liquid delivery pipe is located on the bottom wall or side wall of the cleaning fluid buffer tank 2, near the bottom wall. The liquid delivery pipe is used to output the cleaning fluid after removing air bubbles to the lower interface. It should be understood that, in the embodiments of this application, the liquid delivery pipe is not limited to the bottom surface of the cleaning fluid buffer tank 2, the lower half of the cleaning buffer tank, etc., and can also be located at the top of the buffer tank and connected to the liquid at the bottom of the buffer tank through a suction pipe, which is also an embodiment protected by this invention.

[0059] The evacuation pipe is installed on the top or side wall of the cleaning fluid buffer tank 2, near the top wall. The interface for emptying the buffer tank is not limited to being located on the top of the cleaning fluid buffer tank 2; it can also be located on the side near the upper half of the buffer tank, which is also a specific embodiment of the present invention.

[0060] The interface for replenishing the cleaning fluid is not limited to being on the side; it can also be located on the top of the buffer tank, which is also a specific embodiment of the present invention.

[0061] That is, the interfaces used to connect the air extraction pipe, the delivery pipe and the liquid delivery pipe can be adjusted to the position of the cleaning fluid buffer tank 2 according to actual needs. As long as each pipe can perform its function, the specific setting position can be adjusted as needed.

[0062] The degassing device for liquid circuits provided in this application embodiment also includes a switching switch 4 and a pumping device, wherein the pumping device is connected to either the air extraction pipe or the liquid delivery pipe via the switching switch 4. That is, during operation, the pumping device can be connected to either the air extraction pipe or the liquid delivery pipe via the switching switch 4.

[0063] For example, switch 4 is a two-position three-way valve. When connected, the normally closed port of the two-position three-way valve is connected to the air extraction pipe; the normally open port of the two-position three-way valve is connected to the liquid delivery pipe; and the common port of the two-position three-way valve is connected to the pumping device.

[0064] In this embodiment, the pumping device may include a diaphragm pump 5 and a plunger pump 6 connected to the diaphragm pump 5; wherein the diaphragm pump 5 is connected to the common port of a two-position three-way valve.

[0065] Specifically, the diaphragm pump 5 is the power source for the liquid in the entire pipeline, used for flushing and emptying the pipeline. The cleaning of the inner and outer walls of the sampling needle 7 is achieved by this pump. Its inlet is connected to a solenoid valve, and its outlet is connected to an integrated plunger pump 6.

[0066] The plunger pump 6 is used for liquid aspiration and dispensing, and works in conjunction with the integrated plunger pump 6 controller to achieve quantitative sample aspiration and dispensing from the sampling needle 7. Its inlet is connected to the diaphragm pump 5, and its outlet is connected to the sampling needle 7. The sampling needle 7 is connected to the plunger pump 6 and is used to aspirate or add reagents or samples. This de-aeration device may also include a needle cleaning tank 8 located below the sampling needle 7, and a waste liquid tank 9 connected to the needle cleaning tank 8. The needle cleaning tank 8 and the waste liquid tank 9 are used to collect and store waste liquid used to clean the inner wall of the sampling needle 7.

[0067] To achieve automation, the deaerator in the liquid circuit may also include a level float switch 3 installed in the cleaning fluid buffer tank 2; the level float switch 3 is used to control the switching switch 4 to switch; when the level float switch 3 is on, the pumping device is connected to the suction pipe through the switching switch 4. When the level float switch 3 is installed, it is suspended on the inner side of the top wall of the cleaning fluid buffer tank 2.

[0068] In addition, the two-position three-way valve uses a solenoid valve, which can be energized and de-energized by the liquid level detected by the liquid level float, thus achieving adjustment in different states.

[0069] This invention also provides a method for degassing a liquid path, which uses the aforementioned degassing device. Figure 2 As shown, the method includes the following steps:

[0070] Step 001: Purge the gas from the cleaning fluid buffer tank and fill it with cleaning fluid;

[0071] Specifically, by switching the pumping device to the air extraction pipe, the air in the cleaning fluid buffer tank is expelled and the cleaning fluid is replenished.

[0072] When the cleaning fluid in the cleaning fluid buffer tank is lower than the level float switch, the level float switch controls the pipe-cutting switch to switch, the air extraction pipe is connected to the pumping device, and negative pressure is drawn into the cleaning fluid buffer tank.

[0073] The specific process is as follows: The instrument will read the status of the liquid level float switch 3 in the cleaning fluid buffer tank 2. If the liquid level is lower than the liquid level float switch 3, the emptying process of the cleaning fluid buffer tank 2 will be started. The action is as follows: The solenoid valve is energized. At this time, the diaphragm pump 5 and the air extraction pipe on the cleaning fluid buffer tank 2 are connected. After the diaphragm pump 5 works, the air in the cleaning fluid buffer tank 2 and related pipelines will be discharged to the needle cleaning pool 8 and the waste liquid tank 9. At the same time, under the action of negative pressure, the cleaning fluid will be filled from the cleaning fluid tank 1 into the cleaning fluid buffer tank 2, diaphragm pump 5, plunger pump 6, sampling needle 7 and the pipelines between them until the tank is full.

[0074] It should be understood that in the above steps, the volume of the cleaning fluid buffer tank 2 can be determined based on factors such as the instrument's test throughput and the daily cleaning fluid usage. If the air bubbles collected in the cleaning fluid buffer tank 2 are insufficient to lower the liquid level below the level float switch 3 during a full day of instrument operation, then the cleaning fluid buffer tank 2 does not need to be emptied during the day's testing, reducing waiting time; that is, the cleaning fluid buffer tank 2 only needs to be emptied once per day.

[0075] Step 002: Fill the delivery tube between the cleaning solution buffer tank and the sampling needle with cleaning solution;

[0076] Specifically, the pumping device is connected to the liquid delivery pipe by switching on a switch, and the liquid delivery pipe is filled with cleaning fluid by the pumping device.

[0077] The specific process is as follows: the delivery pipe between the lower interface of the cleaning fluid buffer tank 2 and the sampling needle 7 is filled. At this time, the solenoid valve is de-energized, the diaphragm pump 5 is connected to the delivery pipe, and the diaphragm pump 5 will pump the cleaning fluid into the above-mentioned pipeline, filling the pipeline with cleaning fluid.

[0078] Step 003: The cleaning solution is pumped from the cleaning solution buffer tank to the syringe and sampling needle through the pumping device. The pumping device generates negative pressure in the cleaning solution buffer tank. The negative pressure causes the cleaning solution in the cleaning solution tank to flow into the cleaning solution buffer tank. The air bubbles in the cleaning solution are precipitated under the action of negative pressure and gather in the upper part of the cavity of the cleaning solution buffer tank, thereby achieving the purpose of removing air bubbles.

[0079] Specifically, sampling needle 7 can begin sampling and adding samples, ensuring that the liquid entering the solenoid valve, diaphragm pump 5, plunger pump 6, and sampling needle 7, as well as the tubing between them, is the cleaning solution after removing air bubbles. Diaphragm pump 5 pumps the cleaning solution from the bottom tubing of cleaning solution buffer tank 2 to syringe 6 and sampling needle 7. During this process, a negative pressure is generated in cleaning solution buffer tank 2, causing the cleaning solution in cleaning solution tank 1 to continuously flow into cleaning solution buffer tank 2. As cleaning solution is added to cleaning solution buffer tank 2, air bubbles in the cleaning solution are precipitated under the action of negative pressure and accumulate in the upper part of the cavity of cleaning solution buffer tank 2. The cleaning solution in the lower part of the cavity effectively removes air bubbles, thus solving the problem of inaccurate sample addition by sampling needle 7 caused by air bubbles in the tubing.

[0080] In the above solution, a negative pressure is generated within the cleaning solution buffer tank. This negative pressure causes the cleaning solution in the cleaning solution tank to continuously flow into the buffer tank. Simultaneously, air bubbles in the cleaning solution are precipitated under the negative pressure and accumulate in the upper part of the buffer tank's cavity. The cleaning solution in the lower part of the cavity effectively removes the air bubbles, thus ensuring the accuracy of the sample dosage. This invention is simple to use, occupies little space, has high reliability, significantly removes air bubbles, and has lower manufacturing costs.

[0081] As can be seen from the above description, the main working principle of this invention for removing air bubbles is that a negative pressure environment is formed in the cleaning fluid buffer tank 2 during use. This negative pressure causes air bubbles mixed in with the cleaning fluid to continuously precipitate, thus achieving the purpose of removing air bubbles. The process of generating the negative pressure environment is as follows: during the process of the diaphragm pump 5 drawing the cleaning fluid from the lower interface of the cleaning fluid buffer tank 2 to the plunger pump 6, a certain negative pressure is generated in the cleaning fluid buffer tank 2. This negative pressure can both replenish the cleaning fluid in the cleaning fluid tank 1 through the interface on the right side of the cleaning fluid buffer tank 2 and cause the air bubbles mixed in with the replenished cleaning fluid to overflow, and the air bubbles collect at the top of the buffer tank. The cleaning fluid after removing air bubbles is pumped by the diaphragm pump 5 from the lower interface of the buffer tank to the solenoid valve, diaphragm pump 5, plunger pump 6, and sampling needle 7 and the pipelines between them, thereby solving the problem of inaccurate sample addition by the sampling needle 7 caused by air bubbles in the pipeline.

[0082] It should be understood that the above technical solution exemplifies the use of a liquid level float switch 3 to control a solenoid valve. It should also be understood that the above-mentioned automatic device may not be used in the embodiments of this application; that is, the degassing effect can be achieved by manually controlling the switching switch 4 to change the different states of the liquid circuit degassing device.

[0083] As can be seen from the above description, the liquid degassing device provided in this application embodiment is smaller in size, occupies less instrument space, and has significantly reduced manufacturing costs compared to using commercially available degassing membrane devices in liquid systems. It is also simple to use. Furthermore, the pipeline does not require stagnant water or waiting during use, resulting in higher efficiency. Even if the liquid in the container contains a large number of bubbles, this invention will quickly and effectively remove them, ensuring higher reliability in bubble removal.

[0084] In the description of this application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "back", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this application. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0085] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of the present invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in one or more embodiments of the present invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the term encompasses the element or object listed following the term and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0086] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0087] The technical solution of the present invention has been described above with reference to preferred embodiments. However, these embodiments are merely exemplary and serve only an illustrative purpose. Based on this, various substitutions and improvements can be made to each embodiment, all of which fall within the protection scope of the present invention.

Claims

1. A liquid-channel degassing device, characterized in that, include: A cleaning solution container is used to hold the cleaning solution. A cleaning fluid buffer tank is a closed tank that is connected to a cleaning fluid container. The cleaning fluid buffer tank is equipped with an exhaust pipe for adsorbing gas inside the tank and a delivery pipe for extracting cleaning fluid from the tank. A switching switch and a pumping device, wherein the pumping device is connected to either the air extraction pipe or the liquid delivery pipe via the switching switch; The switching switch is a two-position three-way valve; the normally closed port of the two-position three-way valve is connected to the air extraction pipe; the normally open port of the two-position three-way valve is connected to the liquid delivery pipe. The common port of the two-position three-way valve is connected to the pumping device; The pumping device includes a diaphragm pump and a plunger pump connected to the diaphragm pump; wherein, The diaphragm pump is connected to the common port of the two-position three-way valve; It also includes a sampling needle, which is connected to the plunger pump; It also includes a level float switch installed in the cleaning fluid buffer tank; the level float switch is used to control the switching switch to switch. When the liquid level float switch is turned on, the pumping device is connected to the air extraction pipe through the switching switch.

2. The degassing device for liquid circuits according to claim 1, characterized in that, The liquid delivery pipe is located on the bottom wall or side wall of the cleaning fluid buffer tank, near the bottom wall.

3. The liquid circuit degassing device according to claim 1, characterized in that, The extraction pipe is located on the top or side wall of the cleaning fluid buffer tank, near the top wall.

4. The liquid circuit degassing device according to claim 1, characterized in that, When sampling needles are included It also includes a needle cleaning pool located below the sampling needle.

5. The degassing device for liquid circuits according to claim 4, characterized in that, It also includes a waste liquid tank connected to the needle cleaning tank.

6. The degassing device for liquid circuits according to claim 1, characterized in that, The liquid level float switch is suspended on the inner side of the top wall of the cleaning fluid buffer tank.

7. A method for removing air bubbles from a liquid path, characterized in that, Including the following steps: Purge the gas from the cleaning fluid buffer tank and fill it with cleaning fluid; Fill the delivery tube between the cleaning fluid buffer tank and the sampling needle with cleaning fluid; The cleaning solution is pumped from the cleaning solution buffer tank to the syringe and sampling needle through a pumping device. The pumping device also generates a negative pressure in the cleaning solution buffer tank. The negative pressure causes the cleaning solution in the cleaning solution tank to flow continuously into the cleaning solution buffer tank, and the air bubbles in the cleaning solution are precipitated out under the action of the negative pressure. It also includes: when the cleaning fluid in the cleaning fluid buffer tank is lower than the level float switch, the level float switch controls the switching switch to switch, the air extraction pipe is connected to the pumping device, and negative pressure is drawn into the cleaning fluid buffer tank.

8. The method for removing air bubbles from a liquid path according to claim 7, characterized in that, By switching on the pumping device to connect to the air extraction pipe, the air in the cleaning fluid buffer tank is expelled and the cleaning fluid is replenished.

9. The method for removing air bubbles from a liquid path according to claim 7, characterized in that, Filling the delivery tube between the cleaning fluid buffer tank and the sampling needle with cleaning fluid specifically includes: The pumping device is connected to the liquid delivery pipe by switching on the switch, and the liquid delivery pipe is filled with cleaning fluid by the pumping device.

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