Centrifugal gas-liquid separator

Abstract

The utility model provides a centrifugal type gas-liquid separator. The liquid collecting part in the separator is provided with a functional component which comprises the following components which are fixed together: a blocking piece which is configured to be used for preventing liquid entering a liquid collecting piece arranged in the liquid collecting part from returning to the separating part of the separator; the rotation stopping structure is arranged on the side, facing the discharging part of the separator, of the blocking piece and is configured to be used for inhibiting the liquid entering the liquid collecting piece from rotating around the central longitudinal axis of the separator; and the matching piece is configured to be used for being matched with the liquid collecting piece so as to fix the functional assembly to the liquid collecting piece. By utilizing the centrifugal gas-liquid separator disclosed by the invention, the separation efficiency can be improved, the discharge time can be shortened, the service life of the discharge valve can be prolonged, and a water logging phenomenon in a fuel cell stack can be avoided under the condition that the centrifugal gas-liquid separator is used in a fuel cell system, so that the fuel gas loss in a fuel cell is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas-liquid separators, and in particular to a centrifugal gas-liquid separator. BACKGROUND

[0002] Centrifugal gas-liquid separators achieve separation of gas and liquid based on centrifugal force and cyclone effect. When gas and liquid are mixed into the separator, they form a swirling flow in the cyclone. Due to the centrifugal force, the liquid moves outward and is collected outside the separator, while the gas is further discharged upward along the central axis of the separator.

[0003] In the existing centrifugal gas-liquid separators, since the liquid swirls around the central longitudinal axis of the separator at high speed along with the gas, it is inevitable that the separated liquid is entrained in the upwardly discharged gas and discharged together from the gas outlet. This obviously leads to a decrease in the separation efficiency of the separator. In addition, due to the high swirling speed of the separated liquid, the discharge speed of the liquid via the discharge valve is reduced, the discharge time is prolonged, and thus the opening time of the discharge valve is prolonged, which shortens the service life of the discharge valve.

[0004] In particular, when such a separator is used in a fuel cell system, the low separation efficiency of the separator causes part of the liquid to enter the fuel cell stack along with the gas, which leads to a decrease in the anode temperature of the fuel cell stack, thereby increasing the loss of fuel gas (e.g., hydrogen).

[0005] Therefore, there is a need in the industry for an optimized centrifugal gas-liquid separator that can improve separation efficiency, shorten discharge time, prolong the service life of the discharge valve, and avoid water flooding in the fuel cell stack when used in a fuel cell system, thereby reducing the loss of fuel gas in the fuel cell. SUMMARY

[0006] To achieve at least one of the above objects, the present application provides a centrifugal gas-liquid separator.

[0007] The gas-liquid separator defines a central longitudinal axis and comprises: a guiding portion configured to receive a gas-liquid mixture from outside of the gas-liquid separator; a separating portion configured to receive the gas-liquid mixture from the guiding portion in a cyclonic motion rotating around the central longitudinal axis and separate gas from liquid in the gas-liquid mixture; a liquid collecting portion provided with a liquid collector configured to collect the liquid from the separating portion; and a discharging portion configured to receive the liquid from the liquid collecting portion and discharge it out of the gas-liquid separator. The liquid collecting portion is provided with a functional assembly comprising the following components fixed together: a blocking member configured to prevent the liquid in the liquid collector from returning to the separating portion; a rotation-stopping structure disposed on a side of the blocking member facing the discharging portion and configured to suppress the cyclonic motion of the liquid in the liquid collector around the central longitudinal axis; and a mating member configured to mate with the liquid collector to fix the functional assembly to the liquid collector.

[0008] According to one embodiment of the present application, gaps are formed between the blocking member and the liquid collector and between a radially outer wall of the blocking member and an inner wall of the separating portion; and the blocking member is in the form of a circular baffle disposed perpendicularly to the central longitudinal axis.

[0009] Further, the rotation-stopping structure comprises a rotation-stopping member extending away from the blocking member along the central longitudinal axis, a radially outer wall of the rotation-stopping member comprising: an axially extending wall segment located radially outside a peripheral edge of the blocking member and configured to abut against or close to the inner wall of the separating portion; and an arc-shaped wall segment located on a side of the axially extending wall segment away from the blocking member and configured to match and abut against a shape of an inner wall of the liquid collector.

[0010] Still further, the rotation-stopping member is in the form of a partition wall disposed along a diameter direction of the blocking member, the partition wall having a maximum radial dimension greater than a diameter of the blocking member.

[0011] Alternatively, the rotation-stopping member is in the form of at least two triangular members with concave-arc-shaped hypotenuses uniformly distributed around the central longitudinal axis, each of the triangular members extending toward the central longitudinal axis by a distance not more than a radius of the blocking member.

[0012] Further, at least two of the triangular members extend toward the central longitudinal axis by different distances.

[0013] Further, a top surface of the blocking member is coplanar with a top surface of the rotation-stopping member located radially outside the blocking member.

[0014] According to another embodiment of the present application, the functional component is fixed to the liquid-collecting member by a cooperation of a radially outer wall of the cooperating member with a radially inner wall of the liquid-collecting member. The cooperation can be an interference fit or a snap fit.

[0015] Further, the cooperating member is in the form of a ring with the central longitudinal axis as a central axis, the ring connecting an end of the rotation-stopping member distal to the blocking member and being configured to form the cooperation with the inner wall of the liquid-collecting member.

[0016] According to yet another embodiment of the present application, the blocking member, the rotation-stopping structure and the cooperating member are integrally formed.

[0017] According to still another embodiment of the present application, the liquid-collecting member comprises an inlet section configured to have a flared inner wall expanding towards the separation portion for receiving the functional component and the liquid from the separation portion, a cooperating section configured to be in fluid communication with the inlet section and to cooperate with the cooperating member to fix the functional component to the liquid-collecting member, and a conical section configured to be in fluid communication with the cooperating section to further direct the liquid collected by the liquid-collecting member.

[0018] Further, a sum of an axial length of the inlet section and an axial length of the cooperating section accounts for 1 / 3 of an axial length of the liquid-collecting member, and / or the axial length of the inlet section is equal to the axial length of the cooperating section.

[0019] According to still another embodiment of the present application, the gas-liquid separator is used in a fuel cell system.

[0020] Thus, by using the centrifugal gas-liquid separator according to the present application, the separation efficiency of the separator can be improved, the discharge time can be shortened, the service life of the discharge valve can be prolonged, and in the case of use in a fuel cell system, the water flooding phenomenon in the fuel cell stack can be avoided, thereby reducing the loss of fuel gas in the fuel cell. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings of the present application are merely intended to help describe and understand the technical solutions proposed by the present application, but are not intended to limit the present application to the structures shown in the drawings. In the drawings, the same or similar components will be referred to by the same or similar reference numerals. In the drawings:

[0022] Figure 1 is a sectional view of a centrifugal gas-liquid separator according to the prior art.

[0023] Figure 2 is Figure 1 a cross-sectional view of a liquid collector used in the separator shown in

[0024] Figure 3 is a cross-sectional view of a centrifugal gas-liquid separator according to the present application.

[0025] Figure 4 is Figure 3 a cross-sectional view of a liquid collector used in the separator shown in

[0026] Figure 5A is Figure 3 a bottom perspective view of one embodiment of a functional assembly used in the separator shown in

[0027] Figure 5B is Figure 5A bottom perspective views of the functional assembly from different angles.

[0028] Figures 6-9 are Figure 5A bottom perspective views of several alternative embodiments of the functional assembly. DETAILED DESCRIPTION

[0029] The following description is made in connection with the drawings.

[0030] In a centrifugal gas-liquid separator according to the prior art, as shown in Figure 1 the separator 80 defines a central longitudinal axis L-L, and the separator 80 is divided from its inlet to its outlet into a guiding portion A, a separation portion B, a liquid collection portion C, and a discharge portion D. The guiding portion A guides a gas-liquid mixture (not shown) consisting of gas and liquid from the inlet to a cyclone chamber, thereby causing the gas-liquid mixture to revolve at high speed (typically at 10,000-30,000 revolutions per minute, i.e., 0.2-2 meters per second) around the central longitudinal axis L-L. Next, the gas-liquid mixture that has been subjected to the revolving motion exits the guiding portion A into the separation portion B, where the liquid is separated from the gas-liquid mixture under centrifugal action as the gas-liquid mixture travels downward (the orientation shown in the figure) along the central longitudinal axis L-L, thereby impinging on an inner wall 810 of the separation portion B (the housing of the separator) and flowing under the action of gravity toward the liquid collection portion C. The gas that has been subjected to the separation action exits the separator 80 upward via an exhaust pipe E provided through the guiding portion A.

[0031] In a centrifugal gas-liquid separator according to the prior art, as shown in Figure 1In the illustrated separation structure, the separation section B is in spatial communication with the liquid collection section C, and thus the swirling motion of the gas-liquid mixture also acts on the liquid collection section C. As a result, a portion of the liquid flowing along the inner wall 810 to the liquid collection section C is inevitably entrained by the rising gas flow and exits the separator 80 together with the gas flow from the exhaust pipe E, thereby resulting in a low separation efficiency of the separator 80. Generally, the separation efficiency of such a gas-liquid separator is about 90%.

[0032] Furthermore, since the separated liquid is also in a high-speed swirling motion around the central longitudinal axis L-L, and this high-speed swirling state of the liquid is maintained until the liquid enters the discharge valve provided in the discharge section D. This high-speed swirling state seriously affects the falling speed (discharge speed) of the liquid, thereby resulting in an extended opening time of the discharge valve.

[0033] In addition, in the case where the gas-liquid separator according to the prior art is used in a fuel cell system, the gas (with a portion of the liquid entrained) that exits from the separator with a low separation efficiency causes a decrease in the anode temperature of the fuel cell after entering the fuel cell stack, thereby inevitably increasing the loss of the fuel gas. In a serious case, it can even cause a flooding phenomenon in the fuel cell system, thereby resulting in an abnormal operation of the system. This is obviously uneconomical and needs to be avoided.

[0034] The present application mainly improves the separation section B and the liquid collection section C (particularly, the liquid collection member 800 provided in the liquid collection section C) of the separator. Hereinafter, only the improved part (structure) is described in detail, but this does not mean that the components involved do not include structures or component configurations not mentioned in the present application. Based on this, in order to facilitate the understanding of the specific structures involved in the present application, Figure 1 In other words, in the applicable case, any type of discharge valve can be used in the discharge section D of the separator of the present application. The present application does not limit the specific configuration and structure of the discharge valve.

[0035] Referring to Figure 2 , Figure 2 is a sectional view illustrating Figure 1 the liquid collection member 800 used in the centrifugal gas-liquid separator according to the prior art. The liquid collection member 800 is provided in the liquid collection section C of the separator 80, and is used to collect the liquid separated from the separation section B in a manner of gathering toward the central longitudinal axis L-L, and then deliver the liquid to the exhaust section D, thereby discharging the separator 80 through the exhaust valve.

[0036] As Figure 2As shown in the figure, the inner surface of the liquid collecting member 800 is substantially in the shape of an inverted truncated cone, the upper peripheral edge of which (as shown in the figure) substantially coincides with the radial outer periphery of the liquid collecting member 800 at the inlet. In other words, after the liquid collecting member 800 is assembled into the liquid collecting portion C, the distance between the upper peripheral edge 800P of the truncated cone and the inner wall 810 of the liquid collecting portion C can be negligible. This configuration is intended to facilitate the liquid falling along the inner wall 810 of the separator 80 to flow onto the conical wall surface 800W of the liquid collecting member 800 without obstruction.

[0037] A centrifugal gas-liquid separator according to the present application is described below.

[0038] Referring to Figure 3 , which is a sectional view showing a centrifugal gas-liquid separator according to the present application. As compared with Figure 1 , the main difference between the gas-liquid separator 10 according to the present application and the gas-liquid separator 80 according to the prior art lies in the structure of the liquid collecting member 100 and the additional provision of the functional assembly 200.

[0039] The specific structure of the liquid collecting member 100 used in the gas-liquid separator 10 is described in detail in Figure 4 . Intuitively, the axial length (the length along the central longitudinal axis L-L) L100 of the liquid collecting member 100 is significantly shorter than the axial length L800 of the liquid collecting member 800. The former is at least 1 / 4 shorter than the latter. The advantages of this size reduction are described in Figure 1 and Figure 3 . As can be clearly seen from the specific structure of the separator shown in , the axial length of the separation portion B10 in the separator 10 is increased by about 1 / 4 as compared with the axial length of the separation portion B in the separator 80, while the external dimensions of the separator remain unchanged. This configuration significantly extends the axial length of the separation portion in the separator, i.e., extends the time for which the separation portion performs the gas-liquid separation, thereby facilitating the improvement of the separation efficiency of the separator.

[0040] Figure 2 Unlike the liquid collecting member 800 shown in , the inner surface of the liquid collecting member 100 used in the separator 10 is segmented. Specifically, according to the structure of the inner surface, the liquid collecting member 100 is divided into an inlet segment 101, a matching segment 102, and a conical segment 103.

[0041] The inlet section 101 has an inner wall 101W that is generally trumpet-shaped expanding towards the upper direction (i.e. towards the separation section B in the assembled state) for receiving the liquid separated from the separation section B. Similar to the structure of the liquid collector 800, the outermost periphery 101P of the inlet section 101 (of the inner wall 101W) is also configured to abut against the inner wall 110 of the separator 10, thereby facilitating the smooth transition of the liquid falling along the inner wall 110 of the separator 10 to the inner wall 101W.

[0042] The radial inner wall 102W of the mating section 102 is generally annular. The radial inner wall 102W of the mating section 102 is smoothly joined with the inner wall 101W of the inlet section 101 to facilitate the smooth flow of liquid therebetween. Furthermore, at the joining interface of the mating section 102 with the tapered section 103, the diameter of the mating section 102 is significantly larger than the diameter of the tapered section 103 at this interface. In other words, at this joining interface, a shoulder 100S is provided. The radial dimension of this shoulder 100S is not limited in the present application as long as it is able to function as a retention stop (details below).

[0043] The inner wall 103W of the tapered section 103 is generally frustoconical, with the same vertex angle as the frustoconical inner wall 800W of the liquid collector 800. In other words, as far as the tapered section 103 is concerned, the liquid collector 100 according to the present application is no different from the liquid collector 800 according to the prior art.

[0044] In terms of dimensions, the sum of the axial length L101 of the inlet section 101 and the axial length L102 of the mating section 102 can be about 1 / 3 of the axial length L100 of the liquid collector 100. Also, in some embodiments, the axial length L101 of the inlet section 101 and the axial length L102 of the mating section 102 can be substantially equal.

[0045] Referring back to Figure 3 A functional assembly 200 is also provided in the liquid collection section C10 of the separator 10. The functional assembly 200 is configured to be secured to the liquid collector 100 in a mating manner.

[0046] Figure 5A And Figure 5B A bottom perspective view of one embodiment of the functional assembly 200 used in the separator 10 is shown from a different viewing angle. The functional assembly 200 mainly comprises a blocking member 210, an anti-rotation member 220 and a mating member 230. Although the functional assembly 200 is shown as being integrally formed in the figure, it is understood by those skilled in the art that the three parts of the functional assembly can be separately formed and then secured together.

[0047] The blocking member 210 is in the form of a substantially circular baffle having a diameter slightly smaller than that of the inner wall 110 of the separator 10 (see Figure 3 ), so that in the assembled state, a gap G is formed between the radially outer edge (wall) of the blocking member 210 and the inner wall 110 of the separator 10 to avoid hindering the flow of liquid falling along the inner wall 110 due to the additional provision of the functional assembly 200. The blocking member 210 mainly serves to prevent the liquid entering the collection section C10 (in particular, the liquid collection member 100) from being carried back into the separation section B10 along the rising gas flow and being discharged therefrom through the exhaust pipe E, which further helps to ensure the separation efficiency of the separator 10.

[0048] The anti-swirl member 220 is in the form of a partition wall extending along the diameter direction of the blocking member 210 and away from the blocking member 210 along the central longitudinal axis L-L, and is attached to the side of the blocking member 210 facing away from the separation section B10. The anti-swirl member 220 is provided to reduce the rotational motion speed of the liquid entering the functional assembly 200, and even to suppress the high-speed rotational motion thereof, so as to enable the liquid to flow more quickly towards the discharge section D.

[0049] The radially outer wall 220W of the anti-swirl member 220 is substantially mirror-symmetrical about the central longitudinal axis L-L (although not explicitly shown in the figures), and comprises a first wall segment 220W1 and a substantially arc-shaped second wall segment 220W2 connected to each other. The first wall segment 220W1 extends along a direction parallel to the central longitudinal axis L-L, and is configured to be arranged close to or in abutment with the inner wall 110 of the separator 10, so that the maximum radial dimension of the anti-swirl member 220 (i.e., the radial dimension of the top surface thereof facing the separation section B10) is slightly larger than the diameter of the blocking member 210, so as to form the gap G (indicated in Figure 3 ) between the radially outer wall of the blocking member 210 and the inner wall 110 of the separator 10 for the liquid falling along the inner wall 110 to flow therethrough. The arc-shaped profile of the second wall segment 220W2 is configured to be consistent with the arc-shaped profile of the inner wall 101W of the inlet segment 101 of the liquid collection member 10, so that the radially outer wall of the anti-swirl member 220 can be in abutment with the inner wall 110W of the inlet segment 101 of the liquid collection member 10.

[0050] A mating member 230 is provided on the side of the spin stop 220 distal from the barrier 210. The mating member 230 is configured to form a mating engagement with the mating section 102 of the liquid collector 100 to secure the functional assembly 200 to the liquid collector 100. In the present embodiment, the mating engagement can be an interference fit, a snap fit, or any other mating engagement as can be conceived by those skilled in the art. The mating member 230 is generally in the form of a circular ring. The diameter of the circular ring is slightly larger than the diameter of the mating section 102 of the liquid collector 100 to allow the interference fit described above. For the snap fit, matching protrusions and recesses can be provided on the radially outer wall of the circular ring and the radially inner wall of the mating section 102, respectively. For this mating engagement, the present application does not elaborate further.

[0051] After the mating engagement is achieved, the mating member 230 can be abutted against the shoulder 100S of the mating section 102 to achieve axial positioning of the mating member 230 relative to the mating section 102. Thus, as described above, the present application does not limit the radial dimension of the shoulder 100S as long as it can achieve the axial positioning function described above.

[0052] Although the radially outer wall of the spin stop 220 is shown to be smoothly connected to the radially outer wall of the mating section 102 in Figure 5A and Figure 5B , the present application is not limited thereto. Alternatively, a shoulder can also be provided at the interface between the two, as long as it matches the structure of the mating section 102 of the liquid collector 100 and can achieve the mating engagement between the two to secure the functional assembly 200 to the liquid collector 100 while not affecting the flow of liquid falling along the inner wall to the drain.

[0053] Figure 6 An alternative embodiment of the functional assembly used in the separator shown in Figure 3 is shown. Unlike the embodiment shown in Figure 5A and Figure 5B , in the functional assembly 200A shown in Figure 6 , the spin stops disposed between the barrier 210 and the mating member are generally in the form of three spin stops 220A evenly and discretely arranged around the central longitudinal axis L-L. The three spin stops 220A are shown to be generally identical, each being in the form of a triangular member with a hypotenuse in the form of a concave arc along the radial direction of the barrier. As for each spin stop 220A, it differs from the spin stop 220 in that each spin stop 220A is a portion of the radially outer side of the spin stop 220, which extends from the radially outer wall of the barrier 210 towards the central longitudinal axis L-L by a distance SA that does not exceed the radius of the barrier 210. Although the distance each spin stop 220A extends is shown to be the same, the present application is not limited thereto.

[0054] Figure 7 An alternative embodiment of the functional assembly is shown. Figure 3 An alternative embodiment of the functional assembly is shown. Figure 6 Instead of the functional assembly 200A shown, Figure 7 The functional assembly 200B shown is provided with four spin stops 220B arranged uniformly and discretely around the central longitudinal axis L-L, and each spin stop 220B extends from the radially outer wall of the barrier towards the central longitudinal axis L-L by a distance SB that is greater than the distance SA by which the spin stop 200A extends, but smaller than the radius of the barrier.

[0055] Figure 8 An alternative embodiment of the functional assembly is shown. Figure 3 An alternative embodiment of the functional assembly is shown. Figure 7 Instead of the functional assembly 200B shown, Figure 8 The four spin stops 220C (only three are shown in the figure) provided in the functional assembly 200C shown all extend to the central longitudinal axis L-L (i.e. the extension distance SC is equal to the radius of the barrier), so as to meet each other at the central longitudinal axis L-L, thereby dividing the space between the barrier and the mating piece into four spaces that are independent of each other along the circumferential direction around the central longitudinal axis L-L.

[0056] Figure 9 An alternative embodiment of the functional assembly is shown. Figure 3 An alternative embodiment of the functional assembly is shown. Figure 7 Instead of the functional assembly 200B shown, Figure 9 The functional assembly 200D shown is provided with five spin stops 220D arranged uniformly and discretely around the central longitudinal axis L-L. In addition, the barrier 210D is not attached to each spin stop 220D only at the side thereof facing away from the separation portion B10 as shown in Figure 7 the functional assembly 200B, but the barrier 210D is configured to be embedded on the top surface of the spin stop 220D, so that the top surface of the barrier 210D facing the separation portion B10 is coplanar with the top surface of the spin stop 220D located radially outward of the barrier 210D.

[0057] It can be seen that the number of spin stops, the distance by which the spin stop extends towards the central longitudinal axis, the configuration between the spin stop and the barrier, etc. are not limited in the present application. For example, the top surface of the barrier can even be arranged to be lower than the top surface of the spin stop located radially outward of the barrier. For this, a person skilled in the art can conceive of various other arrangements.

[0058] Although the embodiments of the present application have been described with reference to the accompanying drawings, it is to be understood that various modifications can be made to the above-described embodiments without departing from the scope of the appended claims. The above-described embodiments are merely provided as examples for illustrating the technical solutions of the present application, and are not intended to limit the protection scope of the present application. The features or elements described in one embodiment can be combined with the features or elements in another embodiment, unless they are contradictory with each other. In addition, the specific expressions of features in the appended claims and the possible use of the reference signs are not intended to limit the scope of the protection.

Claims

1. A centrifugal gas-liquid separator (10) defining a central longitudinal axis and comprising: a guiding portion (A) configured to receive a gas-liquid mixture from outside of the gas-liquid separator; a separating portion (B10) configured to receive the gas-liquid mixture from the guiding portion in a cyclonic motion rotating around the central longitudinal axis and to separate gas from liquid in the gas-liquid mixture; a liquid collecting portion (C10) provided with a liquid collector (100) configured to collect the liquid from the separating portion; a discharging portion (D) configured to receive the liquid from the liquid collecting portion and to discharge it out of the gas-liquid separator, characterized in that the liquid collecting portion is provided with a functional assembly (200, 200A, 200B, 200C, 200D) comprising the following components fixed together: a barrier (210, 210D) configured to prevent the liquid entering into the liquid collector from returning into the separating portion; a cyclone-inhibiting structure provided on a side of the barrier facing the discharging portion and configured to inhibit the cyclonic motion of the liquid entering into the liquid collector around the central longitudinal axis; and a mating member (230) configured to mate with the liquid collector to fix the functional assembly to the liquid collector.

2. The centrifugal gas-liquid separator according to claim 1, characterized in that a gap is formed between the barrier and the liquid collector and between a radially outer wall of the barrier and an inner wall (110) of the separating portion; and the barrier is in the form of a circular baffle provided perpendicularly to the central longitudinal axis. the cyclone-inhibiting structure comprises a cyclone-inhibiting member (220, 220A, 220B, 220C, 220D) extending away from the barrier along the central longitudinal axis, a radially outer wall (220W) of the cyclone-inhibiting member comprising:

3. The centrifugal gas-liquid separator according to claim 2, wherein, an axially extending wall segment (220W1) located radially outside an outer peripheral edge of the barrier and configured to abut against or be close to the inner wall of the separating portion; and an arc-shaped wall segment (220W2) located on a side of the axially extending wall segment away from the barrier and configured to match and abut against a shape of an inner wall of the liquid collector. the cyclone-inhibiting member is in the form of one partition wall provided diametrically to the barrier, the partition wall having a maximum radial dimension greater than a diameter of the barrier.

4. The centrifugal gas-liquid separator according to claim 3, wherein the cyclone-inhibiting member is in the form of at least two triangular members with concave-arc-shaped hypotenuses uniformly distributed around the central longitudinal axis, each of the triangular members extending towards the central longitudinal axis by a distance not more than a radius of the barrier.

5. The centrifugal gas-liquid separator according to claim 3, wherein, at least two of the triangular members extend towards the central longitudinal axis by different distances.

6. The centrifugal gas-liquid separator according to claim 5, wherein, a top surface of the barrier is coplanar with a top surface of the cyclone-inhibiting member located radially outside the barrier.

7. The centrifugal gas-liquid separator according to any one of claims 4-6, characterized in that, ​ 8. The centrifugal gas-liquid separator according to claim 2, wherein, The functional component is secured to the liquid collector by the cooperation of the radially outer wall of the cooperating member with the radially inner wall of the liquid collector.

9. The centrifugal gas-liquid separator according to claim 8, the cooperation being an interference fit or a snap fit.

10. The centrifugal gas-liquid separator according to any one of claims 4-6, characterized in that, The cooperating member is in the form of a ring centered on the central longitudinal axis, the ring connecting an end of the anti-rotation member distal to the blocking member and configured to form the cooperation with the inner wall of the liquid collector.

11. The centrifugal gas-liquid separator according to any one of claims 1-6, 8 and 9, characterized in that, The blocking member, the anti-rotation structure and the cooperating member are integrally formed.

12. The centrifugal gas-liquid separator according to any one of claims 1-6, 8 and 9, characterized in that, The liquid collector (100) comprises: an inlet section (101) configured to have a flared inner wall (101W) expanding towards the separation portion for receiving the functional component and the liquid from the separation portion (B10); a cooperating section (102) configured to be in fluid communication with the inlet section and to cooperate with the cooperating member (230) to secure the functional component to the liquid collector; and a tapered section (103) configured to be in fluid communication with the cooperating section to further direct the liquid collected by the liquid collector.

13. The centrifugal gas-liquid separator according to claim 12, wherein: the sum of the axial length (L101) of the inlet section and the axial length (L102) of the cooperating section is 1 / 3 of the axial length (L100) of the liquid collector, and / or the axial length of the inlet section is equal to the axial length of the cooperating section.

14. The centrifugal gas-liquid separator according to any one of claims 1-6, 8, 9 and 13, characterized in that, The gas-liquid separator is used in a fuel cell system.

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