Vapor-liquid separator testing system

Abstract

The utility model provides a testing system for a vapor-liquid separator. The testing system for the vapor-liquid separator comprises a gas cylinder; a gas supply line; the atomization assembly comprises a water storage part, a water pump and an atomizer which are communicated in sequence, and the atomizer is used for humidifying gas of the gas supply pipeline; the first water collecting box is used for being communicated with a water outlet of the tested equipment, and the first water collecting box is used for collecting liquid separated by the tested equipment; the retention pipeline is used for being communicated with an air outlet of the tested equipment; one end of the drying pipeline is communicated with the gas cylinder, and the other end of the drying pipeline is communicated with the retention pipeline; and the first temperature and humidity detection piece is arranged on the retention pipeline and located on the downstream of the joint of the drying pipeline and the retention pipeline, and the first temperature and humidity detection piece is used for detecting the temperature and humidity of gas in the retention pipeline. According to the technical scheme provided by the utility model, the problem that the separation efficiency of the vapor-liquid separator cannot be tested in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-liquid separator testing, in particular to a gas-liquid separator testing system. Background Art

[0002] At present, in hydrogen fuel cell systems, the fuel cell reaction will generate water. After the reaction, when the incompletely reacted hydrogen is discharged from the anode outlet of the fuel cell module, it will carry a certain amount of water vapor and liquid moisture. If the water vapor and liquid moisture in the hydrogen are not removed, it will not only block the hydrogen pipeline and affect the normal operation of the battery system, but also damage the battery electrodes and other components, shortening the service life of the fuel cell system.

[0003] In the prior art, a gas-liquid separator is usually installed at the anode outlet of the stack module to separate water vapor and liquid water in hydrogen. However, there is no solution to test the separation efficiency of the gas-liquid separator, and it is impossible to judge the separation efficiency of the gas-liquid separator. Utility Model Content

[0004] The utility model provides a gas-liquid separator testing system to solve the problem that the prior art cannot test the separation efficiency of the gas-liquid separator.

[0005] According to the utility model, a gas-liquid separator test system is provided, comprising: a gas cylinder; a gas supply pipeline, one end of which is connected to the gas cylinder, and the other end of which is connected to the air inlet of a device under test; an atomizing assembly, the atomizing assembly comprising a water storage portion, a water pump and an atomizer which are connected in sequence, the atomizer being used to humidify the gas in the gas supply pipeline, the atomizer being located in the middle of the gas supply pipeline; a first water collecting box being used to be connected to the drain outlet of the device under test, the first water collecting box being used to collect liquid separated by the device under test; a retention pipeline, the retention pipeline being used to be connected to the air outlet of the device under test; a drying pipeline, one end of which is connected to the gas cylinder, and the other end of which is connected to the retention pipeline; a first temperature and humidity detecting component, which is arranged on the retention pipeline and is located downstream of the connection between the drying pipeline and the retention pipeline, the first temperature and humidity detecting component being used to detect the temperature and humidity of the gas in the retention pipeline.

[0006] Furthermore, the gas-liquid separator test system also includes: a primary heater and a humidifier, and the primary heater, the humidifier and the atomizer are sequentially distributed on the gas supply pipeline.

[0007] Furthermore, the gas-liquid separator test system also includes a secondary heater, which is arranged on the air supply pipeline and located between the humidifier and the atomizer.

[0008] Furthermore, the gas-liquid separator test system also includes a second water collecting box, which is connected to the air supply pipeline and is located between the atomizer and the device under test.

[0009] Furthermore, the gas-liquid separator testing system also includes: the retention pipeline has a transparent pipe section.

[0010] Furthermore, the gas-liquid separator test system also includes: an air pump, which is arranged on the retention pipeline and is arranged close to the gas outlet of the device under test; and an ejector, which is arranged at the connection between the drying pipeline and the retention pipeline.

[0011] Furthermore, the gas-liquid separator test system also includes: a first flow meter, a pressure reducing valve and a proportional valve. The first flow meter, the pressure reducing valve and the proportional valve are all arranged on the drying pipeline. The pressure reducing valve is located upstream of the first flow meter, and the proportional valve is located downstream of the first flow meter.

[0012] Furthermore, the gas-liquid separator test system also includes a filter, a flow valve and a second flow meter. The filter, the flow valve and the second flow meter are all arranged on the air supply pipeline and are all located upstream of the atomizer.

[0013] Furthermore, the gas-liquid separator test system also includes a drain valve and a drain pipe, one end of the drain pipe is used to communicate with the drain port of the tested device, and the other end of the drain pipe is connected to the first water collecting box, and the drain pipe is provided with a drain valve.

[0014] Furthermore, the gas-liquid separator test system also includes: a second temperature and humidity detection component, which is arranged on the gas supply pipeline and located upstream of the atomizer, and the second temperature and humidity detection component is used to detect the temperature and humidity of the gas in the gas supply pipeline.

[0015] Applying the technical solution of the utility model, the present application sets a gas cylinder to provide dry hydrogen, connects the gas cylinder and the air inlet of the device under test through a gas supply pipeline, and sets an atomization component on the gas supply pipeline. Among them, the atomization component includes a water storage part, a water pump and an atomizer connected in sequence, and the water pump pumps the water in the water storage part to the atomizer to humidify the gas to simulate the amount of water carried by the hydrogen when it is discharged from the anode outlet of the stack module when the actual fuel cell reacts. A first water collecting box is set at the drain outlet of the device under test to collect the liquid separated by the device under test. After the hydrogen is discharged from the gas outlet of the device under test, it will be passed into the retention pipeline. At this time, the dry hydrogen in the gas cylinder is passed from the drying pipeline into the retention pipeline, and the changes in the measurement value of the first temperature and humidity detection component are observed at the same time, and the moisture carried by the hydrogen in the retention pipeline is dried. Through the technical solution provided in the present application, the amount of liquid separated by the device under test is obtained through the first water collecting box, so as to evaluate the separation effect of the gas-liquid separator under test, and the hydrogen retained in the pipeline is dried by the dry hydrogen in the drying pipeline to facilitate the recycling of hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of a gas-liquid separator testing system provided according to an embodiment of the utility model is shown.

[0018] The above drawings include the following reference numerals:

[0019] 10. Gas cylinders;

[0020] 21. Water storage unit; 22. Water pump; 23. Atomizer;

[0021] 31. Humidity sensor; 32. First temperature and pressure sensor; 33. Second temperature and pressure sensor; 34. Second humidity sensor; 35. Third temperature and pressure sensor;

[0022] 40, back pressure valve; 50, primary heater; 60, humidifier; 70, secondary heater; 80, second water collecting box; 90, first flow meter; 100, air pump; 110, ejector; 120, pressure reducing valve; 130, proportional valve; 140, filter; 150, flow valve; 160, second flow meter; 170, drain valve; 180, second pressure reducing valve; 190, second drain valve;

[0023] 200, gas supply pipeline; 300, equipment under test;

[0024] 400, retention pipeline; 500, drying pipeline; 600, drainage pipeline. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] like Figure 1As shown, the embodiment of the utility model provides a gas-liquid separator test system, which includes: a gas cylinder 10, a gas supply pipeline 200, an atomization assembly, a first water collection box, a retention pipeline, a drying pipeline and a first temperature and humidity detection component. One end of the gas supply pipeline 200 is connected to the gas cylinder 10, and the other end of the gas supply pipeline 200 is connected to the air inlet of the device under test 300. The atomization assembly includes a water storage part 21, a water pump 22 and an atomizer 23 connected in sequence. The atomizer 23 is used to humidify the gas in the gas supply pipeline 200, and the atomizer 23 is located in the middle of the gas supply pipeline 200. The first water collection box is used to communicate with the drain outlet of the device under test 300, and the first water collection box is used to collect the liquid separated by the device under test 300. The retention pipeline 400 is used to communicate with the gas outlet of the device under test 300. One end of the drying pipeline 500 is connected to the gas cylinder 10, and the other end of the drying pipeline 500 is connected to the retention pipeline 400. The first temperature and humidity detection member is arranged on the retention pipeline 400 and is located downstream of the connection between the drying pipeline 500 and the retention pipeline 400. The first temperature and humidity detection member is used to detect the temperature and humidity of the gas in the retention pipeline 400.

[0027] Applying the technical solution of the utility model, the present application sets a gas cylinder 10 to provide dry hydrogen, connects the gas cylinder 10 with the air inlet of the device under test 300 through the gas supply pipeline 200, and sets an atomization assembly on the gas supply pipeline 200. Among them, the atomization assembly includes a water storage part 21, a water pump 22 and an atomizer 23 connected in sequence, and the water pump 22 pumps the water in the water storage part 21 to the atomizer 23 to humidify the gas to simulate the amount of water carried by hydrogen when it is discharged from the electrode of the stack when the actual fuel cell reacts. A first water collection box is set at the drain outlet of the device under test 300 to collect the liquid separated by the device under test 300. After the hydrogen is discharged from the gas outlet of the device under test 300, it will be passed into the retention pipeline 400. At this time, the dry hydrogen in the gas cylinder 10 is passed into the retention pipeline 400 from the drying pipeline 500, and the change of the measurement value of the first temperature and humidity detection component is observed at the same time, and the moisture carried by the hydrogen in the retention pipeline 400 is dried. Through the technical solution provided by the present application, the amount of liquid separated by the device under test 300 is obtained through the first water collecting box, and the gas-liquid separation effect of the device under test 300 can be evaluated, and the dry hydrogen in the drying pipeline 500 is used to dry the hydrogen in the retention pipeline 400, so as to facilitate the recycling of hydrogen.

[0028] Among them, by using the drying pipeline 500 and the first temperature and humidity detection component, the actual water content of the hydrogen after the actual fuel cell reaction can also be calculated, and then the hydrogen in the gas supply pipeline 200 can be humidified according to the actual water content, so that the simulation scene is more realistic. Specifically, the device under test 300 can be connected to the hydrogen outlet of the actual fuel cell, and the hydrogen discharged from the fuel cell for circulation can be collected to calculate the water content in the hydrogen. After the hydrogen discharged from the fuel cell is passed into the device under test 300, the first temperature and humidity detection component will display the measured value. At this time, the dry hydrogen in the gas cylinder 10 is passed from the drying pipeline 500 into the retention pipeline 400, and the detection value of the first temperature and humidity detection component is observed. When the detection value begins to change and then tends to a stable value x, the timing starts, and the timing is stopped after t minutes. At this time, the water volume V in the first water collecting box is calculated. 1 , the hydrogen flow rate W at the fuel cell end 1 , and the dry hydrogen flow rate W 2 , combined with the detection value x of the first temperature and humidity detection component, the amount of water V carried by the hydrogen discharged from the device under test 300 within t minutes can be calculated 2 , V 1 With V 2 The sum is the amount of water carried by the hydrogen discharged from the fuel cell within t minutes. Then the hydrogen in the gas supply pipeline 200 is humidified according to the actual water content, so that the simulation data is more realistic.

[0029] In the present application, the diameter of the droplets sprayed by the atomizer 23 is between 0.1-0.5 mm, and it is kept in an atomized state when mixing with the upstream hydrogen, not in a water flow or water drop state. Maintaining the atomized state can mix with the hydrogen faster. When the droplet diameter is less than 0.1 mm, it will cause difficulty in spraying the droplets. When the droplet diameter is greater than 0.5 mm, the droplets are easily splashed directly onto the side wall of the device when spraying, and cannot be mixed with the hydrogen.

[0030] Furthermore, the gas-liquid separator test system also includes a primary heater 50 and a humidifier 60, and the primary heater 50, the humidifier 60 and the atomizer 23 are sequentially distributed on the gas supply line 200. The primary heater 50 is mainly used to adjust the temperature of the hydrogen in the gas supply line 200, and the humidifier 60 is used to provide the gas humidity required for the test. Through the above-mentioned settings, the corresponding temperature and humidity can be provided for the hydrogen to simulate the temperature and humidity of the hydrogen generated by the actual fuel cell stack, so as to ensure the accuracy of the separation efficiency calculation and test. Specifically, the gas-liquid separator test system also includes a secondary heater 70, which is arranged on the gas supply line 200 and is located between the humidifier 60 and the atomizer 23. When the dry hydrogen passes through the humidifier 60, it may become hydrogen with a humidity of 100% and an unknown amount of water. At this time, it is difficult to calculate the water content in the hydrogen. By arranging a secondary heater downstream of the humidifier 60, the humidity of the hydrogen is reduced by heating so that the hydrogen is in an unsaturated state before entering the atomizer 23. This arrangement makes it easier to obtain the water content in the hydrogen and improves the calculation accuracy of the separation efficiency.

[0031] The gas-liquid separator test system further includes a second water collecting box 80, which is connected to the gas supply pipeline 200 and is located between the atomizer 23 and the device under test 300. After the hydrogen is atomized and humidified by the atomizer 23, the humidity of the hydrogen is 100% and contains some water that cannot be dissolved with the hydrogen. If this part of the undissolved water is not discharged in advance, it will be counted as the amount of water separated by the gas-liquid separator, which will lead to inaccurate measurement data. Therefore, the second water collecting box 80 is set before entering the device under test 300 to collect this part of the water that cannot be dissolved with the hydrogen, so that the calculation of the separation efficiency of the device under test 300 is more accurate. A second temperature and pressure sensor 33 is also set between the second water collecting box 80 and the device under test 300 to measure the temperature of the hydrogen before entering the device under test 300. The second water collecting box 80 is also connected to a second drain valve 190 to discharge the water collected in the second water collecting box 80 to facilitate the measurement of the flow rate.

[0032] Furthermore, the retention pipeline 400 has a transparent pipe section. With such a configuration, when hydrogen is discharged from the device under test 300 into the transparent pipe section on the retention pipeline 400, the unseparated droplets in the hydrogen will condense on the transparent pipe section. By observing the condensation of the droplets on the inner wall of the transparent pipe section, the separation efficiency of the device under test can also be indirectly judged. A back pressure valve 40 is provided on the drying pipeline, which mainly controls the pressure distribution of the gas in the entire device to ensure the pressure stability of each pipeline.

[0033] Specifically, the gas-liquid separator test system further includes a drying pipeline 500, one end of which is connected to the gas cylinder 10, and the other end of which is connected to the retention pipeline 400. In the present application, the first temperature and humidity detection member further includes a second humidity sensor 34 and a third temperature and pressure sensor 35. Through the above arrangement, the dry hydrogen in the gas cylinder 10 can be passed from the drying pipeline 500 to the retention pipeline 400, and the condensed droplets on the inner wall of the retention pipeline 400 can be absorbed.

[0034] In the present application, the gas-liquid separator test system further includes an air pump 100 and an ejector 110. The air pump 100 is arranged on the retention pipeline 400, and the air pump 100 is arranged near the gas outlet of the device under test 300. The ejector 110 is arranged at the connection between the drying pipeline 500 and the retention pipeline 400. The air pump 100 is used to accelerate the hydrogen discharged from the gas outlet of the device under test 300 and pump it into the ejector 110. Then, the ejector 110 uses the accelerated hydrogen to drain the low-speed dry hydrogen in the gas cylinder 10 through the drying pipeline 500 to the retention pipeline 400, and absorb the water in the hydrogen in the pipe.

[0035] Specifically, the gas-liquid separator test system also includes a first flow meter 90, a pressure reducing valve 120 and a proportional valve 130, and the first flow meter 90, the pressure reducing valve 120 and the proportional valve 130 are all arranged on the drying pipeline 500, the pressure reducing valve 120 is located upstream of the first flow meter 90, and the proportional valve 130 is located downstream of the first flow meter 90. The pressure reducing valve is mainly used to control the pressure stability of the drying pipeline 500, and the proportional valve 130 is used to control the pressure and flow of dry hydrogen. Through the above settings, the first flow meter 90 records the flow rate of dry hydrogen in the drying pipeline 500, and by observing the numerical changes of the second humidity sensor 34 and the third temperature and pressure sensor 35, the amount of water absorbed by hydrogen in the retention pipeline 400 can be calculated, and the separation efficiency of the device under test 300 can be further verified, and as the amount of water atomized by the front atomizer 23 gradually increases, the limit separation data of the device under test 300 can also be obtained through the above device.

[0036] Furthermore, the gas-liquid separator test system also includes a filter 140, a flow valve 150 and a second flow meter 160, and the filter 140, the flow valve 150 and the second flow meter 160 are all arranged on the gas supply line 200, and are all located upstream of the atomizer 23. The filter 140 is used to filter impurities in the dry hydrogen to ensure the accuracy of the calculation. The flow valve 150 is used to control the flow of the dry hydrogen, and the second flow meter 160 is used to record the flow of the dry hydrogen. Among them, a second pressure reducing valve 180 is also arranged in front of the filter 140 to control the pressure stability in the gas supply line 200.

[0037] The gas-liquid separator test system further includes a drain valve 170 and a drain pipe 600. One end of the drain pipe 600 is used to communicate with the drain port of the device under test 300, and the other end of the drain pipe 600 is communicated with the first water collecting box. The drain valve 170 is provided on the drain pipe 600. By providing the drain valve 170, after the gas-liquid separation of the device under test 300 is completed, the drain valve 170 is opened to discharge the separated liquid to the first water collecting box for collection and calculation.

[0038] Specifically, the gas-liquid separator test system also includes a second temperature and humidity detection component, which is arranged on the gas supply pipeline 200 and located upstream of the atomizer 23. The second temperature and humidity detection component is used to detect the temperature and humidity of the gas in the gas supply pipeline 200. Among them, the second temperature and humidity detection component includes a humidity sensor 31 and a first temperature and pressure sensor 32 connected in sequence, which are used to record the temperature and humidity of the hydrogen before entering the atomizer 23, so that the water content in the hydrogen can be accurately obtained, and the calculation accuracy of the separation efficiency can be improved.

[0039] Specifically, when the gas-liquid separator test system provided in the present application is used to test the separation efficiency of the device under test 300, the operation steps are as follows:

[0040] Open the gas cylinder and introduce dry hydrogen into the gas supply pipeline 200. The impurities in the dry hydrogen are filtered through the filter 140. The dry hydrogen enters the primary heater 50 through the flow valve 150 for heating to simulate the temperature of the hydrogen generated by the real fuel cell. The hydrogen passes through the humidifier 60 to simulate the humidity required for the test. The hydrogen then enters the secondary heater 70 for heating to prevent the hydrogen from reaching 100% humidity. The hydrogen flow rate is measured as L after passing through the first flow meter 90, the humidity sensor 31 and the first temperature and pressure sensor 32. 3 , humidity is RH 1 , temperature is t 1 , and then the water is atomized and humidified by the atomizer 23. The flow rate of water pumped out from the water storage part 21 for humidifying the hydrogen is recorded as L, and the flow rate of water collected by the second water collection box 80 is recorded as L 1 , at this time the humidity of hydrogen is 100%, that is, RH 2 The second temperature and pressure sensor 33 records the temperature of the hydrogen before it enters the device under test 300 as t 2 The water content of the gas before the device under test 300 is calculated by the following formula:

[0041]

[0042] e = RH × Es;

[0043] E S =E 0 ×10 a×t / (b+t) .

[0044] in:

[0045] e: water vapor pressure (Pa);

[0046] RH: relative humidity % (percent);

[0047] Es: saturated water vapor pressure (Pa);

[0048] E 0 :When t=0℃, the saturated water vapor pressure is 611(Pa);

[0049] a, b: when t>0 degrees Celsius, a=7.5, b=237.3;

[0050] t: gas temperature (℃);

[0051] ρω: water content (g / m^3);

[0052] Rw: gas constant of water, taken as 0.46152 (J / (g*K)).

[0053] By using the above formula, the amount of water before entering the device under test 300 can be calculated as:

[0054] L+ρω 1 ×L 3 -L 1 -ρω 2 ×L 3 ;

[0055] The above formula converts the water content ρω in hydrogen with a humidity of 100% 2 ×L 3 Subtract, because this part of water does not participate in the separation process, so the calculation of separation efficiency is more accurate.

[0056] After the tested device 300 finishes working, the amount of water collected in the first water collection box is recorded as L 2 , the separation efficiency calculation formula of the device under test 300 is as follows:

[0057]

[0058] in:

[0059] η: separation efficiency;

[0060] L: total water flow;

[0061] L 1 : Liquid water flow rate not involved in the separator;

[0062] L 2 : The actual water flow rate separated by the separator;

[0063] L 3: Source gas flow rate.

[0064] By using the gas-liquid separator test system provided in the present application and combining it with the above formula, the separation efficiency of the gas-liquid separator under test can be calculated more conveniently and accurately, thereby enabling an intuitive evaluation of the gas-liquid separator.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0067] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0068] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0069] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0070] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vapor-liquid separator testing system, characterized in that: The vapor-liquid separator testing system comprises: Gas cylinders (10); A gas supply pipeline (200), one end of the gas supply pipeline (200) being in communication with the gas cylinder (10), and the other end of the gas supply pipeline (200) being in communication with the gas inlet of the device under test (300); an atomizing assembly, the atomizing assembly comprising a water storage portion (21), a water pump (22) and an atomizer (23) which are connected in sequence, the atomizer (23) being used to humidify the gas in the gas supply pipeline (200), the atomizer (23) being located in the middle of the gas supply pipeline (200); A first water collection box, used to communicate with the drain outlet of the device under test (300), the first water collection box being used to collect liquid separated by the device under test (300); A retention pipeline (400), the retention pipeline (400) being used to communicate with the gas outlet of the device under test (300); a drying pipeline (500), one end of the drying pipeline (500) being in communication with the gas cylinder (10), and the other end of the drying pipeline (500) being in communication with the retention pipeline (400); A first temperature and humidity detection component is arranged on the retention pipeline (400) and is located downstream of the connection between the drying pipeline (500) and the retention pipeline (400), and the first temperature and humidity detection component is used to detect the temperature and humidity of the gas in the retention pipeline (400).

2. The vapor-liquid separator testing system according to claim 1, characterized in that: The gas-liquid separator test system further comprises: a primary heater (50) and a humidifier (60); the primary heater (50), the humidifier (60) and the atomizer (23) are sequentially distributed on the gas supply pipeline (200).

3. The vapor-liquid separator testing system according to claim 2, characterized in that: The gas-liquid separator testing system further comprises a secondary heater (70), wherein the secondary heater (70) is arranged on the gas supply pipeline (200) and is located between the humidifier (60) and the atomizer (23).

4. The vapor-liquid separator testing system according to claim 1, characterized in that: The gas-liquid separator test system further comprises a second water collecting box (80), wherein the second water collecting box (80) is in communication with the gas supply pipeline (200) and is located between the atomizer (23) and the device under test (300).

5. The vapor-liquid separator testing system according to claim 1, characterized in that: The retention pipeline (400) has a transparent pipe section.

6. The vapor-liquid separator testing system according to claim 1, characterized in that: The vapor-liquid separator testing system further comprises: An air pump (100) is arranged on the retention pipeline (400), and the air pump (100) is arranged close to the air outlet of the device under test (300); The ejector (110) is arranged at the connection between the drying pipeline (500) and the retention pipeline (400).

7. The vapor-liquid separator testing system according to claim 6, characterized in that: The vapor-liquid separator test system further comprises: a first flow meter (90), a pressure reducing valve (120) and a proportional valve (130); the first flow meter (90), the pressure reducing valve (120) and the proportional valve (130) are all arranged on the drying pipeline (500); the pressure reducing valve (120) is located upstream of the first flow meter (90), and the proportional valve (130) is located downstream of the first flow meter (90).

8. The vapor-liquid separator testing system according to claim 1, characterized in that: The gas-liquid separator test system further comprises a filter (140), a flow valve (150) and a second flow meter (160); the filter (140), the flow valve (150) and the second flow meter (160) are all arranged on the gas supply pipeline (200) and are all located upstream of the atomizer (23).

9. The vapor-liquid separator testing system according to claim 1, characterized in that: The gas-liquid separator test system further comprises a drain valve (170) and a drain pipeline (600), one end of the drain pipeline (600) being used to communicate with a drain port of the device under test (300), and the other end of the drain pipeline (600) being connected with the first water collecting box, and the drain valve (170) being arranged on the drain pipeline (600).

10. The vapor-liquid separator testing system according to claim 1, characterized in that: The vapor-liquid separator testing system further comprises: A second temperature and humidity detection component is arranged on the gas supply pipeline (200) and is located upstream of the atomizer (23). The second temperature and humidity detection component is used to detect the temperature and humidity of the gas in the gas supply pipeline (200).

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