Air-liquid separator

Abstract

To provide a gas-liquid separator which enables easy manufacturing while securing its performance.SOLUTION: A gas-liquid separator 11 causes discharged fuel gas to flow into a case 12 and discharges water separated from the fuel gas from a discharge port 32 of the case 12. The case 12 has an upper case 14 and a lower case 15. Between the upper case 14 and the lower case 15, a partition member 13 which partitions these cases from each other is disposed. The upper case 14 has a first chamber 20 and a second chamber 21 partitioned by a partition wall part 19, an inflow port 22, and an outflow port 23. The lower case 15 has a third chamber 26 and the discharge port 32. The partition member 13 has: a first communication hole 28 which allows communication between the first chamber 20 and the third chamber 26; and a second communication hole 29 which allows communication between the second chamber 21 and the third chamber 26. A first water storage part 35 and a second water storage part 36 which are formed enclosed by an upper surface 13a of the partition member 13 and an inner surface of the upper case 14 and store generated water, are respectively provided at the first chamber 20 and the second chamber 21.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a gas-liquid separator that separates water from fuel gas discharged from a fuel cell stack.

Background Art

[0002] Conventionally, as this type of gas-liquid separator, for example, the one shown in Patent Document 1 is known. Such a gas-liquid separator has a configuration in which a recess is formed at the lower part inside a casing (case), and a drain port (discharge port) for discharging liquid water (water) is provided at the bottom of the recess. A storage part forming member is inserted into the recess. The storage part forming member has a left first storage part (first water storage part) and a right first storage part (second water storage part) for storing liquid water.

[0003] And in the gas-liquid separator as described above, after the operation of the fuel cell stack is stopped, the liquid water inside the casing is stored in the left first storage part and the right first storage part. Thereby, even when the air temperature drops below the freezing point, it is suppressed that the liquid water in the drain port freezes in a flowing-in state.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the gas-liquid separator as described above, although the liquid water inside the casing can be stored in the left first storage part and the right first storage part, the structure of the storage part forming member having these storage parts has become extremely complicated. For this reason, since it takes time to manufacture the storage part forming member, there is a problem that it becomes difficult to manufacture the gas-liquid separator.

Means for Solving the Problems

[0006] The following describes the means and effects of solving the above problems. A gas-liquid separator that solves the above problems flows fuel gas discharged from a fuel cell stack into a case to separate water contained in the fuel gas, and discharges the separated water from an outlet located at the lower end of the case, wherein the case has an upper case and a lower case located below the upper case, a partition member is placed between the upper case and the lower case to separate the inside of the upper case and the inside of the lower case, and the upper case has a first chamber and a second chamber separated by a partition wall, and the fuel gas flows into the first chamber The gist of the invention is that the lower case has an inlet for inflow and an outlet for outflowing the fuel gas from the second chamber, the lower case has a third chamber and an outlet, the partition member has a first connecting hole for connecting the first chamber and the third chamber and a second connecting hole for connecting the second chamber and the third chamber, and the first chamber and the second chamber are each provided with a first water storage section and a second water storage section, which are formed by surrounding the upper case side surface of the partition member and the inner surface of the upper case and for storing water generated in the first chamber and the second chamber.

[0007] According to the above configuration, the upper case, lower case, and partition member can be made of resin and easily manufactured by injection molding. The first and second water storage sections, which store the water generated in the first and second chambers respectively, are formed by surrounding the upper case-side surface of the partition member with the inner surface of the upper case. Therefore, a gas-liquid separator with the first and second water storage sections inside the case can be easily manufactured simply by joining the upper case and lower case with the partition member in between.

[0008] Furthermore, after the fuel cell stack is shut down, water is generated due to the condensation of water vapor in the first and second chambers. This generated water is stored in the first and second water reservoirs within the case, respectively. This prevents the water from freezing in the discharge port, especially in cold regions where the ambient temperature is below freezing. Consequently, the performance of the gas-liquid separator can be ensured. [Brief explanation of the drawing]

[0009] [Figure 1] This is an exploded perspective view of a gas-liquid separator according to one embodiment. [Figure 2] This is a perspective view of a gas-liquid separator. [Figure 3] This is a cross-sectional view of the gas-liquid separator when the case is in the first configuration. [Figure 4] This is a perspective view of the upper case with the partition members assembled. [Figure 5] This is a perspective view of the case shown above. [Figure 6] This is a perspective view showing the inside of the lower case. [Figure 7] This is a cross-sectional view of the outlet in the lower case. [Figure 8] This is a cross-sectional view of the dummy outlet in the lower case. [Figure 9] This is a cross-sectional view of the gas-liquid separator when the case is in the second configuration. [Modes for carrying out the invention]

[0010] An embodiment of the gas-liquid separator will be described below with reference to the drawings. As shown in Figures 1 and 2, the gas-liquid separator 11 separates water (reaction product water) contained in the fuel gas by allowing unreacted excess fuel gas (hydrogen) discharged from the fuel cell stack (not shown) to flow into the case 12. The gas-liquid separator 11 is made of synthetic resin. The gas-liquid separator 11 comprises a case 12 and a partition member 13 placed inside the case 12. The case 12 and the partition member 13 are formed, for example, by injection molding.

[0011] <Case 12> As shown in Figures 1, 3, and 5, the case 12 has an upper case 14 and a lower case 15 positioned below the upper case 14.

[0012] The upper case 14 has a rectangular first opening 16 on its lower side and is roughly triangular in shape. The upper case 14 has two adjacent slopes, a first slope 17 and a second slope 18, in the direction of the long side of the first opening 16. The interior of the upper case 14 is divided into a first chamber 20 and a second chamber 21 by a partition wall 19 that is perpendicular to the first opening 16 and extends in the direction of the short side of the first opening 16. The first chamber 20 has a larger volume than the second chamber 21.

[0013] The partition wall 19 has a roughly U-shape in cross-section and is located between the first slope 17 and the second slope 18. The first chamber 20 is located on the side of the first slope 17. The second chamber 21 is located on the side of the second slope 18. At the end of the first slope 17 opposite to the side of the first opening 16, an inlet 22 is provided for introducing unreacted excess fuel gas discharged from the fuel cell stack (not shown) into the first chamber 20. The inlet 22 is positioned diagonally opposite the partition wall 19. Piping (not shown) is connected to the inlet 22.

[0014] An outlet 23 is provided at the end of the second slope 18 opposite to the first opening 16 side for discharging fuel gas after water has been separated from the second chamber 21. The outlet 23 is positioned diagonally opposite the partition wall 19. Piping (not shown) is connected to the outlet 23. Multiple protrusions 24 are provided around the first chamber 20 and the second chamber 21 at the end of the upper case 14 on the first opening 16 side. The multiple protrusions 24 are arranged at appropriate intervals to surround the first chamber 20 and the second chamber 21.

[0015] As shown in Figures 1, 3, and 6, the lower case 15 has a rectangular second opening 25 on its upper side that corresponds to the first opening 16 of the upper case 14, and is roughly rectangular in shape. The inside of the lower case 15 is designated as a third chamber 26. The upper case 14 and the lower case 15 are joined together with their first opening 16 and second opening 25 in contact. This forms case 12. In this example, the upper case 14 and the lower case 15 are joined by welding.

[0016] <Partition member 13> As shown in FIGS. 1, 3, and 4, the partition member 13 is in the shape of a rectangular plate. At positions corresponding to the plurality of protrusions 24 of the upper case 14 in the partition member 13, a plurality of fitting holes 27 into which the plurality of protrusions 24 are fitted are respectively formed. The partition member 13 is attached to cover the first chamber 20 and the second chamber 21 with respect to the upper case 14 by fitting the protrusions 24 into the respective fitting holes 27.

[0017] Therefore, the partition member 13 is disposed between the upper case 14 and the lower case 15. That is, the partition member 13 partitions the inside of the upper case 14 and the inside of the lower case 15. In other words, the partition member 13 partitions the first chamber 20 and the second chamber 21 from the third chamber 26.

[0018] At a position corresponding to the central portion of the first chamber 20 in the partition member 13, a rectangular first communication hole 28 for communicating the first chamber 20 and the third chamber 26 is formed to penetrate. At a position corresponding to the central portion of the second chamber 21 in the partition member 13, a rectangular second communication hole 29 for communicating the second chamber 21 and the third chamber 26 is formed to penetrate. The first communication hole 28 and the second communication hole 29 have the same length in the short side direction of the first opening 16. The first communication hole 28 is longer than the second communication hole 29 in the long side direction of the first opening 16.

[0019] <Gas-liquid separator 11> As shown in FIGS. 3 and 9, in the gas-liquid separator 11, the partition member 13 makes an angle of 45° with respect to the first inclined surface 17 and the second inclined surface 18, respectively. The first inclined surface 17 and the second inclined surface 18 make an angle of 90°. The gas-liquid separator 11 is used in the first arrangement mode (the posture shown in FIG. 3) or the second arrangement mode (the posture shown in FIG. 9).

[0020] When used in the first arrangement mode shown in FIG. 3, the lower end portion of the lower case 15, which is the lower end portion of the case 12 in the gas-liquid separator 11, is set as the first position 30. When used in the second arrangement mode shown in FIG. 9, the lower end portion of the lower case 15, which is the lower end portion of the case 12 in the gas-liquid separator 11, is set as the second position 31.

[0021] <Gas-liquid separator 11 when used in the first configuration> As shown in Figure 3, when the gas-liquid separator 11 is used in the first configuration, the case 12 is positioned so that the inlet 22 faces sideways (horizontally). The first slope 17 is parallel to the vertical plane, and the second slope 18 is parallel to the horizontal plane. The partition member 13 is at a 45° angle with respect to the horizontal plane.

[0022] As shown in Figures 3 and 7, a discharge port 32 is formed at the first position 30 of the lower case 15 for discharging water separated from the fuel gas inside the case 12. The discharge port 32 connects the inside of the case 12 to the outside of the case 12. Piping (not shown) is connected to the discharge port 32.

[0023] As shown in Figures 3 and 8, a dummy outlet 33 is formed at the second position 31 of the lower case 15, which prevents the water from being discharged from inside the case 12. The dummy outlet 33 has the same appearance as the outlet 32, but is blocked from the inside of the case 12 by a barrier wall 34. Therefore, the dummy outlet 33 does not connect the inside of the case 12 to the outside of the case 12.

[0024] When the lower case 15 is formed by injection molding, the mold insert is selectively positioned between the first position 30 and the second position 31. If the insert is positioned at the first position 30, an outlet 32 ​​without a barrier wall 34 is formed at the first position 30, and a dummy outlet 33 with a barrier wall 34 is formed at the second position 31. If the insert is positioned at the second position 31, an outlet 32 ​​without a barrier wall 34 is formed at the second position 31, and a dummy outlet 33 with a barrier wall 34 is formed at the first position 30.

[0025] As shown in Figure 3, the first chamber 20 is provided with a first water reservoir 35 that is formed by surrounding a part of the upper surface 13a of the partition member 13, which is the surface facing the upper case 14, with a part of the inner surface of the upper case 14, and which stores water generated in the first chamber 20. Specifically, the first water reservoir 35 is formed in the first chamber 20 by surrounding the part of the upper surface 13a of the partition member 13 below the first communication hole 28 with the inner surface of the upper case 14 corresponding to that part. Therefore, when the water level in the first water reservoir 35 reaches the first communication hole 28, the water in the first water reservoir 35 overflows from the first communication hole 28 to the third chamber 26.

[0026] The second chamber 21 is formed by enclosing a part of the upper surface 13a of the partition member 13 and a part of the inner surface of the upper case 14, and is provided with a second water storage section 36 for storing water generated in the second chamber 21. That is, in the second chamber 21, the second water storage section 36 is formed by enclosing the part of the upper surface 13a of the partition member 13 below the second communication hole 29 and the inner surface of the upper case 14 corresponding to that part. In this case, the inner surface of the upper case 14 also includes a part of the inner surface of the partition wall 19. Therefore, when the water level in the second water storage section 36 reaches the second communication hole 29, the water in the second water storage section 36 overflows from the second communication hole 29 to the third chamber 26.

[0027] As shown in Figures 3 and 6, a third water storage section 37 is provided above the first position 30 where the outlet 32 ​​is located in the third chamber 26 of the lower case 15. The third water storage section 37 collects water that overflows from the first water storage section 35 and the second water storage section 36, respectively, and enters the third chamber 26 through the first communication hole 28 and the second communication hole 29.

[0028] The third water storage section 37 is formed by enclosing it with the inner surface of the lower case 15 by providing a crank-shaped partition plate 38 that extends along the inner surface of the lower case 15 at a position diagonally above the first position 30 in the third chamber 26. The third water storage section 37 is located adjacent to the discharge port 32. The third water storage section 37 has an L-shaped box form with an open upper end on the partition member 13 side.

[0029] <Gas-liquid separator 11 when used in the second configuration> As shown in Figure 9, when the gas-liquid separator 11 is used in the second configuration, the case 12 is positioned so that the inlet 22 faces upward (upward in the vertical direction). The first slope 17 is parallel to the horizontal plane, and the second slope 18 is parallel to the vertical plane. The partition member 13 is at a 45° angle with respect to the horizontal plane.

[0030] As shown in Figures 7 and 9, a discharge port 32 is formed at the second position 31 of the lower case 15 for discharging water separated from the fuel gas inside the case 12. The discharge port 32 connects the inside of the case 12 to the outside of the case 12. Piping (not shown) is connected to the discharge port 32.

[0031] As shown in Figures 8 and 9, a dummy outlet 33 is formed at the first position 30 of the lower case 15, from which the water is not discharged from inside the case 12. The dummy outlet 33 has the same appearance as the outlet 32, but is blocked from the inside of the case 12 by a barrier wall 34. For this reason, the dummy outlet 33 does not connect the inside of the case 12 to the outside of the case 12.

[0032] As shown in Figure 9, the first chamber 20 is provided with a first water reservoir 35 that is formed by surrounding a part of the upper surface 13a of the partition member 13, which is the surface facing the upper case 14, with a part of the inner surface of the upper case 14, and which stores water generated in the first chamber 20. That is, in the first chamber 20, the first water reservoir 35 is formed by surrounding the part of the upper surface 13a of the partition member 13 below the first communication hole 28 with the inner surface of the upper case 14 corresponding to that part. In this case, the inner surface of the upper case 14 also includes a part of the inner surface of the partition wall 19. Therefore, when the water level in the first water reservoir 35 reaches the first communication hole 28, the water in the first water reservoir 35 overflows from the first communication hole 28 to the third chamber 26.

[0033] The second chamber 21 is formed by surrounding a part of the upper surface 13a of the partition member 13, which is the surface facing the upper case 14, with a part of the inner surface of the upper case 14, and is provided with a second water reservoir 36 for storing water generated in the second chamber 21. Specifically, the second water reservoir 36 is formed in the second chamber 21 by surrounding the part of the upper surface 13a of the partition member 13 below the second communication hole 29 with the inner surface of the upper case 14 corresponding to that part. Therefore, when the water level in the second water reservoir 36 reaches the second communication hole 29, the water in the second water reservoir 36 overflows from the second communication hole 29 into the third chamber 26.

[0034] As shown in Figures 6 and 9, a third water storage section 37 is provided above the second position 31 where the outlet 32 ​​is located in the third chamber 26 of the lower case 15. The third water storage section 37 collects water that overflows from the first water storage section 35 and the second water storage section 36, respectively, and enters the third chamber 26 through the first communication hole 28 and the second communication hole 29.

[0035] The third water storage section 37 is formed by surrounding the third water storage section 37 with the inner surface of the lower case 15, by providing a crank-shaped partition plate 38 that extends along the inner surface of the lower case 15 at a position diagonally above the second position 31 in the third chamber 26. The third water storage section 37 is located adjacent to the discharge port 32. The third water storage section 37 has an L-shaped box form with an open upper end on the partition member 13 side.

[0036] Next, the operation of the gas-liquid separator 11 will be explained. As shown in Figure 3, when the gas-liquid separator 11 is used in the first configuration, when the fuel cell stack (not shown) is started and power is generated, the unreacted excess high-temperature fuel gas discharged from the fuel cell stack flows into the first chamber 20 in the case 12 from the inlet 22. This fuel gas contains reaction product water in the form of water vapor.

[0037] The fuel gas that flows into the first chamber 20 from the inlet 22 flows into the third chamber 26 through the first communication hole 28. The fuel gas that flows into the third chamber 26 flows into the second chamber 21 through the second communication hole 29. The fuel gas that flows into the second chamber 21 flows out of the case 12 from the outlet 23. The water vapor contained in the fuel gas flowing inside the case 12 turns into liquid water as it flows through the case 12, flows down the case 12, and then flows into the outlet 32 ​​and is discharged outside the case 12.

[0038] When the fuel cell stack (not shown) is shut down, the temperature inside the pipes (not shown) connected to the inlet 22 and outlet 23, as well as inside the case 12, drops. As a result, the water vapor in each pipe (not shown) condenses, and liquid water falls from the inlet 22 and outlet 23 into the first chamber 20 and the second chamber 21, respectively, or water vapor condenses in the first chamber 20 and the second chamber 21, respectively. In this way, liquid water is produced in the first chamber 20 and the second chamber 21, respectively.

[0039] The water generated in the first chamber 20 and the second chamber 21 is collected in the first water storage section 35 and the second water storage section 36, respectively. If the water in the first water storage section 35 overflows, the overflowing water flows downward through the first communication hole 28 and along the lower surface 13b of the partition member 13, and then flows along the lower inner surface of the lower case 15 into the third water storage section 37 on the outlet 32 ​​side.

[0040] On the other hand, if the water accumulated in the second water storage section 36 overflows, the overflowing water flows downward through the second communication hole 29 and along the lower surface 13b of the partition member 13, and then flows along the lower inner surface of the lower case 15 into the third water storage section 37 on the outlet 32 ​​side. Therefore, even if water overflows from the first water storage section 35 and the second water storage section 36, the overflowing water is both collected in the third water storage section 37 on the outlet 32 ​​side.

[0041] Therefore, after the operation of the fuel cell stack (not shown) is stopped, the flow of liquid water into the outlet 32 ​​is suppressed. Consequently, even if the temperature around the gas-liquid separator 11 falls below freezing point, the freezing of liquid water in the outlet 32 ​​is suppressed. As a result, clogging of the outlet 32 ​​and the piping (not shown) connected to the outlet 32 ​​due to water freezing is suppressed. Therefore, even when the operation of the fuel cell stack (not shown) is restarted, the water in the case 12 is quickly discharged from the outlet 32.

[0042] Furthermore, as shown in Figure 9, even when the gas-liquid separator 11 is used in the second configuration, the same effects and advantages as when the gas-liquid separator 11 is used in the first configuration are obtained. <Effects of the Embodiment> According to the embodiments described in detail above, the following effects are achieved.

[0043] (1) The gas-liquid separator 11 allows fuel gas discharged from the fuel cell stack to flow into the case 12, separates the water contained in the fuel gas, and discharges the separated water from the outlet 32 ​​located at the lower end of the case 12. The case 12 has an upper case 14 and a lower case 15 located below the upper case 14. A partition member 13 is placed between the upper case 14 and the lower case 15 to separate the inside of the upper case 14 from the inside of the lower case 15. The upper case 14 has a first chamber 20 and a second chamber 21 separated by a partition wall 19, an inlet 22 for introducing fuel gas into the first chamber 20, and an outlet 23 for releasing fuel gas from the second chamber 21. The lower case 15 has a third chamber 26 and an outlet 32. The partition member 13 has a first connecting hole 28 that connects the first chamber 20 and the third chamber 26, and a second connecting hole 29 that connects the second chamber 21 and the third chamber 26. The first chamber 20 and the second chamber 21 are each provided with a first water storage section 35 and a second water storage section 36, which are formed by surrounding the surface of the partition member 13 on the upper case 14 side with the inner surface of the upper case 14 and storing water generated in the first chamber 20 and the second chamber 21.

[0044] According to the above configuration, the upper case 14, lower case 15, and partition member 13 can be made of resin and easily manufactured by injection molding. The first water storage section 35 and the second water storage section 36, which store the water generated in the first chamber 20 and the second chamber 21 respectively, are formed by surrounding the upper surface 13a of the partition member 13, which is the surface on the upper case 14 side, with the inner surface of the upper case 14. Therefore, a gas-liquid separator 11 with the first water storage section 35 and the second water storage section 36 provided inside the case 12 can be easily manufactured simply by joining the upper case 14 and the lower case 15 with the partition member 13 in between.

[0045] Furthermore, after the fuel cell stack is shut down, water is generated by the condensation of water vapor in the first chamber 20 and the second chamber 21. This generated water is stored in the first water storage section 35 and the second water storage section 36 within the case 12, respectively. This prevents the water from freezing when it flows into the outlet 32, especially in cold regions where the ambient temperature is below freezing. Thus, the performance of the gas-liquid separator 11 can be ensured.

[0046] (2) In the gas-liquid separator 11, a third water storage section 37 is provided above the outlet 32 ​​in the third chamber 26 to store water that overflows from the first water storage section 35 and the second water storage section 36, respectively, and enters the third chamber 26 through the first communication hole 28 and the second communication hole 29.

[0047] With the above configuration, even if water overflows from the first water storage section 35 and the second water storage section 36, the overflowing water can be stored in the third water storage section 37. Therefore, in cold regions where the ambient temperature is below freezing, the freezing of water flowing into the outlet 32 ​​can be further suppressed.

[0048] (3) In the gas-liquid separator 11, the lower case 15 has a discharge port 32 at a first position 30 which is the lower end when the case 12 is positioned with the inlet 22 facing sideways, and a discharge port 32 at a second position 31 which is the lower end when the case 12 is positioned with the inlet 22 facing upward. A third water storage section 37 is provided above the first position 30 in the third chamber 26 when the first configuration is used, and above the second position 31 in the third chamber 26 when the second configuration is used.

[0049] With the above configuration, whether case 12 is in the first configuration or the second configuration, water overflowing from both the first water storage section 35 and the second water storage section 36 can be stored in the third water storage section 37. Therefore, the gas-liquid separator 11 can be used in both the first and second configurations of case 12. In other words, the gas-liquid separator 11 can be selectively used in the two configurations of case 12. Thus, the versatility of the gas-liquid separator 11 can be increased.

[0050] (Example of change) The above embodiment can be implemented with the following modifications. Furthermore, the above embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0051] At least one of the pair of third water storage sections 37 may be omitted. The upper case 14 and the lower case 15 may be joined not only by welding, but also, for example, by using bolts and nuts. In this case, it is preferable to place a gasket on the joint surface between the upper case 14 and the lower case 15 to ensure a tight seal.

[0052] The partition wall portion 19 may be in the shape of a flat plate. [Explanation of symbols]

[0053] 11... Gas-liquid separator 12... Cases 13… Partition member 13a…Top surface 13b…Bottom surface 14…Upper case 15...Bottom case 16…First opening 17…First slope 18…Second slope 19…Partition wall part 20...Room 1 21…Second room 22…Inlet 23... Outlet 24…Protrusion 25...Second opening 26...Room 3 27…Matching hole 28...1st communication hole 29…Second communication hole 30…1st position 31…2nd position 32…Discharge port 33... Dummy outlet 34... Barrier wall 35…First Water Reservoir 36... Second Water Reservoir 37…Third Water Reservoir 38… Partition plate

Claims

1. In a gas-liquid separator that allows fuel gas discharged from a fuel cell stack to flow into a case to separate water contained in the fuel gas, and discharges the separated water from an outlet located at the lower end of the case, The case comprises an upper case and a lower case positioned below the upper case. A partition member is placed between the upper case and the lower case to separate the inside of the upper case from the inside of the lower case. The aforementioned case has a first chamber and a second chamber separated by a partition wall, an inlet for introducing the fuel gas into the first chamber, and an outlet for releasing the fuel gas from the second chamber. The lower case has a third chamber and an outlet, The partition member has a first connecting hole that connects the first chamber and the third chamber, and a second connecting hole that connects the second chamber and the third chamber. A gas-liquid separator characterized in that the first chamber and the second chamber are each provided with a first water storage section and a second water storage section, which are formed by surrounding the partition member on the upper case side with the inner surface of the upper case and storing water generated in the first chamber and the second chamber, respectively.

2. The gas-liquid separator according to claim 1, characterized in that a third water reservoir is provided above the outlet in the third chamber for collecting water that overflows from the first water reservoir and the second water reservoir, respectively, and enters the third chamber through the first and second communication holes.

3. The aforementioned lower case includes: In the first arrangement configuration in which the case is positioned with the inlet facing sideways, the discharge port is formed at the first position which is the lower end. In the second arrangement configuration in which the case is positioned with the inlet facing upward, the discharge port is formed at the second position which is the lower end. The gas-liquid separator according to claim 2, characterized in that the third water storage section is provided above the first position in the third chamber in the first configuration and above the second position in the third chamber in the second configuration.

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