Fuel cell exhaust and drainage device

Abstract

The present invention discloses a fuel cell exhaust and drainage device, which relates to the field of fuel cells. The device includes a mounting tube, a rotating fan and at least two silencer rings. One end of the mounting tube is closed, and the other end of the mounting tube is open. The closed end of the mounting tube is connected to an air intake pipe. A drainage port is provided on the side wall of the mounting tube. Each silencer ring and the rotating fan are coaxially mounted in the mounting tube, and the silencer ring is located between the air intake pipe and the rotating fan. Since the silencer ring has a conical inner wall, and the end with a larger inner diameter of each silencer ring is closer to the rotating fan, among adjacent silencer rings, the minimum inner diameter of the silencer ring closer to the rotating fan is smaller than the maximum inner diameter of the silencer ring closer to the air intake pipe, so that the sound wave is reflected multiple times between two adjacent silencer rings, and only a part of the frequency noise can enter the next silencer ring, so that the noise of a part of the frequency is filtered out by the silencer ring, thereby reducing the noise when discharging water vapor and gas.

Description

Technical Field

[0001] The invention relates to the field of fuel cells, and in particular to an exhaust and drainage device for a fuel cell. Background Art

[0002] A fuel cell is a chemical device that converts the chemical energy of a fuel directly into electrical energy. It belongs to electrochemical power generation, which is the fourth power generation technology after hydropower, thermal power generation and nuclear power generation.

[0003] During the operation of the fuel cell, water is generated, and the generated water is discharged from the fuel cell in the form of water vapor together with the gas that does not participate in the reaction.

[0004] Water vapor and gas are usually discharged through the exhaust and drainage device of the fuel cell. Due to the high pressure during discharge, loud noise will be generated, forming noise pollution. Summary of the invention

[0005] The embodiment of the present invention provides a fuel cell exhaust and drainage device, which can reduce the noise when discharging water vapor and gas. The technical solution is as follows:

[0006] An embodiment of the present invention provides an exhaust drainage device for a fuel cell, comprising a mounting cylinder, a rotating fan and at least two silencer rings, wherein one end of the mounting cylinder is closed and the other end of the mounting cylinder is open, the closed end of the mounting cylinder is connected to an air intake pipe, a side wall of the mounting cylinder is provided with a drainage port, each of the silencer rings and the rotating fan are coaxially mounted in the mounting cylinder, the silencer ring is located between the air intake pipe and the rotating fan, the silencer ring has a conical inner wall, an end of the conical inner wall of the silencer ring with a larger inner diameter is closer to the rotating fan, and among adjacent silencer rings, the minimum inner diameter of the silencer ring closer to the rotating fan is smaller than the maximum inner diameter of the silencer ring closer to the air intake pipe.

[0007] Optionally, among the adjacent silencer rings, the minimum inner diameter of the silencer ring closer to the rotating fan is smaller than the minimum inner diameter of the silencer ring closer to the air intake pipe.

[0008] Optionally, a plurality of through holes are circumferentially distributed on the silencer ring, connecting the inner side wall and the outer side wall of the silencer ring.

[0009] Optionally, an outer side wall of the silencer ring is provided with an annular groove coaxial with the silencer ring, and the plurality of through holes are all located in the annular groove.

[0010] Optionally, adjacent silencer rings are detachably connected via stoppers.

[0011] Optionally, the inner wall of the mounting tube has an annular positioning flange, and the silencer ring closest to the air intake pipe among the silencer rings has a stop that matches the annular positioning flange.

[0012] Optionally, it also includes a collecting ring, the inner wall of which has an annular guide groove, the collecting ring has a collecting hole connecting the annular guide groove and the outer wall of the collecting ring, the collecting ring is coaxially placed in the mounting tube, and the rotating fan is installed in the collecting ring.

[0013] Optionally, fan mounting frames are respectively installed at both ends of the collecting ring, a mounting shaft is connected between the two fan mounting frames, and the rotating fan is rotatably mounted on the mounting shaft.

[0014] Optionally, the fan mounting frame includes an annular frame and a plurality of spokes, one ends of the plurality of spokes are connected, and the other ends of the plurality of spokes are all connected to the annular frame.

[0015] Optionally, a water collecting trough is further included, wherein the water collecting trough is connected to the outer side wall of the mounting tube, and a water trough opening of the water collecting trough is connected to the drain port.

[0016] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least: by arranging an air intake pipe at one end of the mounting tube, water vapor and gas can enter the mounting tube through the air intake pipe, and by coaxially arranging at least two silencer rings and a rotating fan in the mounting tube, since the silencer ring has a conical inner wall, the end with a larger inner diameter of the conical inner wall of the silencer ring is closer to the rotating fan, and among adjacent silencer rings, the minimum inner diameter of the silencer ring closer to the rotating fan is smaller than the maximum inner diameter of the silencer ring closer to the air intake pipe, so that a conical space is formed between adjacent silencer rings, and sound waves enter from the top of the conical space and are reflected at the bottom of the conical space. The reflected sound waves are reflected again on the conical inner wall, so that the sound waves are reflected multiple times between the two adjacent silencer rings and are absorbed, and only noise of a part of the frequency can enter the next silencer ring, so that the noise of a part of the frequency is filtered out by the silencer ring, thereby reducing the noise when discharging water vapor and gas. After passing through multiple silencer rings, water vapor and gas push the rotating fan to do work, causing the temperature to drop. The water vapor liquefies into water and attaches to the fan blades. It is thrown away from the fan blades under the action of centrifugal force and finally discharged through the drain port of the mounting tube. The gas is discharged from the other end of the mounting tube after passing through the rotating fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is an exploded schematic diagram of a fuel cell exhaust and drainage device provided by an embodiment of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a mounting tube provided by an embodiment of the present invention;

[0020] Figure 3 It is a partial structural schematic diagram of a muffler ring provided by an embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of a partial structure of a collector ring provided in an embodiment of the present invention;

[0022] Figure 5 It is a schematic diagram of an exploded view of another fuel cell exhaust and drainage device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Figure 1 1 is a schematic diagram of an exploded view of a fuel cell exhaust and drainage device provided by an embodiment of the present invention. Figure 1 As shown, the fuel cell exhaust and drainage device includes a mounting tube 10 , a rotating fan 20 and four silencer rings 30 .

[0025] Figure 2 Schematic diagram of the structure of a mounting tube provided by an embodiment of the present invention. Figure 2 As shown, one end of the mounting tube 10 is closed, and the other end of the mounting tube 10 is open. The closed end of the mounting tube 10 is connected to the air inlet pipe 11, and a drainage port 10a is provided on the side wall of the mounting tube 10. Each silencer ring 30 and the rotating fan 20 are coaxially mounted in the mounting tube 10, and a plurality of silencer rings 30 are located between the air inlet pipe 11 and the rotating fan 20.

[0026] Figure 3 It is a schematic diagram of the partial structure of a silencer ring provided in an embodiment of the present invention. Figure 3 It is shown in Figure 1 The two silencer rings closest to the mounting tube 10 are shown in the figure. The dotted lines in the figure are the axes of the two silencer rings. Figure 3As shown, the muffler ring 30 has a conical inner wall. The end of the conical inner wall of the muffler ring 30 with a larger inner diameter is closer to the rotating fan 20. Among the adjacent muffler rings 30, the minimum inner diameter of the muffler ring 30 closer to the rotating fan 20 is smaller than the maximum inner diameter of the muffler ring 30 closer to the intake pipe 11. For example Figure 3 In the figure, the right silencer ring is closer to the rotating fan 20, the left silencer ring is closer to the air intake pipe 11, and the minimum inner diameter d2 of the right silencer ring is smaller than the maximum inner diameter d1 of the left silencer ring.

[0027] The minimum inner diameter of the silencer ring 30 here refers to the inner diameter of the end of the tapered inner wall of the silencer ring 30 with a smaller inner diameter, and the maximum inner diameter of the silencer ring 30 refers to the inner diameter of the end of the tapered inner wall of the silencer ring 30 with a larger inner diameter.

[0028] By arranging an air intake pipe at one end of the mounting tube, water vapor and gas can enter the mounting tube through the air intake pipe. By coaxially arranging at least two silencer rings and a rotating fan in the mounting tube, since the silencer ring has a conical inner wall, the end with a larger inner diameter of the conical inner wall of the silencer ring is closer to the rotating fan, and among adjacent silencer rings, the minimum inner diameter of the silencer ring closer to the rotating fan is smaller than the maximum inner diameter of the silencer ring closer to the air intake pipe, so that a conical space is formed between adjacent silencer rings, and sound waves enter from the top of the conical space (i.e., the smaller end of the conical space), are reflected at the bottom of the conical space, and the reflected sound waves are reflected again on the conical inner wall ( Figure 3 The dotted arrows in the figure schematically show the two reflections of the sound wave, and the actual number of reflections is not only two), so that the sound wave is reflected multiple times between two adjacent silencer rings and eventually disappears. Only a part of the frequency noise can enter the next silencer ring, so that the noise of some frequencies is filtered out by the silencer ring, thereby reducing the noise when emitting water vapor and gas. After passing through multiple silencer rings, the water vapor and gas push the rotating fan to do work, so that the temperature is reduced, the water vapor liquefies into water and attaches to the fan blades, and is thrown away from the fan blades under the action of centrifugal force, and finally discharged through the drain port of the installation tube, and the gas is discharged from the other end of the installation tube after passing through the rotating fan.

[0029] like Figure 2 As shown, the air inlet pipe 11 can be coaxial with the mounting tube 10 , so that the gas can enter the fuel cell exhaust and drainage device along the axis of the mounting tube 10 , allowing the gas to pass through the muffler ring 30 better.

[0030] When the fuel cell exhaust and drainage device is in use, the installation tube 10 is horizontal, and the drainage port 10a is located at the lowest point of the installation tube 10. Figure 2 As shown, the drain port 10a may be strip-shaped, and the drain port 10a extends along the length direction of the installation tube 10, so that water can be discharged from the drain port 10a as quickly as possible.

[0031] like Figure 2 As shown, the inner wall of the mounting tube 10 may have an annular positioning flange 12. The one of the silencer rings 30 closest to the air intake pipe 11 has a stop 30c that matches the annular positioning flange 12. When the silencer ring 30 closest to the air intake pipe 11 is installed in the mounting tube 10, the stop 30c on the silencer ring 30 can be stuck on the annular positioning flange 12, which facilitates the installation of the silencer ring 30 and can also prevent gas from entering between the outer wall of the silencer ring 30 and the inner wall of the mounting tube 10, so that the gas enters the silencer ring 30.

[0032] The annular positioning flange 12 may be located at a closed end of the mounting barrel 10, for example Figure 2 In the embodiment, the annular positioning flange 12 is located at the end of the closed end of the mounting tube 10 .

[0033] Optionally, adjacent silencer rings 30 may be detachably connected via stoppers. Figure 3 As shown, the end with a smaller inner diameter of each silencer ring 30 may have a stop 30c, and the stop 30c may match the end with a larger inner diameter of the silencer ring 30. When a plurality of silencer rings 30 are assembled into the mounting tube 10, the plurality of silencer rings 30 are clamped together by the stop 30c, so that the plurality of silencer rings 30 can be conveniently installed into the mounting tube 10 as a whole.

[0034] Different numbers of silencer rings 30 may be provided for different fuel cell exhaust and drainage devices. For example, in the present embodiment, four silencer rings 30 are provided. In other embodiments, only two, three or more silencer rings may be provided. Arranging multiple silencer rings 30 to be detachably connected through stoppers can facilitate assembly of different numbers of silencer rings 30.

[0035] In addition, the multiple silencer rings 30 may also be connected by a fixed connection method, such as welding, bonding, hot-melt connection, etc.

[0036] The maximum inner diameter of the silencer ring 30 can be the same as the inner diameter of the annular positioning flange 12, so that the stop 30c on the silencer ring 30 can simultaneously meet the requirements of matching with the annular positioning flange 12 and the silencer ring 30. During assembly, no matter which silencer ring 30 is installed first, the silencer ring 30 can be positioned by the annular positioning flange 12, and adjacent silencer rings 30 can also be smoothly connected, so that multiple silencer rings 30 can be installed in the installation tube 10 in any order.

[0037] Optionally, the minimum inner diameters of the multiple silencer rings 30 may be different. The conical space formed between adjacent silencer rings 30 has little effect on the noise with a frequency near the natural frequency of the conical space, and the noise of this part of the frequency is reduced to a small extent when passing through the silencer ring 30. By setting the minimum inner diameter of each silencer ring 30 differently, the size of each conical space can be different, and the natural frequency of each conical space is also different, so that the noise in a wider frequency range can be absorbed, thereby improving the effect of reducing noise.

[0038] like Figure 3 As shown, among the adjacent muffler rings 30, the minimum inner diameter of the muffler ring 30 closer to the rotating fan 20 is smaller than the minimum inner diameter of the muffler ring 30 closer to the intake pipe 11, as shown in FIG. Figure 3 The minimum inner diameter d1 of the silencer ring 30 on the right side is smaller than the minimum inner diameter d3 of the silencer ring 30 on the left side. By arranging the plurality of silencer rings 30 in this order, the silencer rings 30 closer to the rotary fan 20 have smaller minimum inner diameters, which can accelerate the airflow. When the airflow reaches the rotary fan 20, it can have a higher flow rate, so that the rotation speed of the rotary fan 20 is higher, so that the water attached to the fan blades can be thrown off.

[0039] like Figure 3 As shown, the silencer ring 30 may be circumferentially provided with a plurality of through holes 30a that connect the inner wall and the outer wall of the silencer ring 30. When water vapor and gas pass through the silencer ring 30, according to the principle of micropore silencing, the through holes 30a can convert a portion of low-frequency noise into high-frequency noise that exceeds the hearing range of the human ear, thereby further reducing the noise. After the water vapor enters the silencer ring 30, a portion of the water vapor will condense into water and adhere to the inner wall of the silencer ring 30. This portion of water can be discharged to the outside of the silencer ring 30 through the through holes 30a and discharged through the drain port 10a.

[0040] Optionally, the outer side wall of the muffler ring 30 may also have an annular groove 30b coaxial with the muffler ring 30, and the plurality of through holes 30a are all located in the annular groove 30b. In this way, water discharged from the plurality of through holes 30a will flow along the annular groove 30b, which is convenient for drainage.

[0041] The silencer ring 30 may be interference-fitted with the mounting tube 10 , so as to reduce the vibration of the silencer ring 30 when the gas passes through the silencer ring 30 .

[0042] Reference Figure 1 The fuel cell exhaust and drainage device may further include a collector ring 40 . Figure 4 FIG. 1 is a schematic diagram of a partial structure of a collector ring provided by an embodiment of the present invention. Figure 4As shown, the inner wall of the collector ring 40 has an annular guide groove 40a, and the collector ring 40 has a collector hole 40b connecting the annular guide groove 40a and the outer wall of the collector ring 40. The collector ring 40 is coaxially placed in the installation tube 10, and the rotary fan 20 is installed in the collector ring 40. When assembling the exhaust and drainage device of the fuel cell, the rotary fan 20 can be installed in the collector ring 40 first, and then the collector ring 40 can be installed in the installation tube 10, which is convenient for the installation of the rotary fan 20, and the water thrown off the fan blades of the rotary fan 20 can enter the annular guide groove 40a, and enter the collector hole 40b along the annular guide groove 40a, so that the water in the collector ring 40 can be discharged in time.

[0043] Reference Figure 1 , fan mounting frames 50 can be respectively installed at both ends of the collector ring 40. A mounting shaft 21 is connected between the two fan mounting frames 50, and the rotating fan 20 is rotatably mounted on the mounting shaft 21. By providing the fan mounting frame 50, the rotating fan 20 can be easily installed on the collector ring 40.

[0044] Optionally, the fan mounting frame 50 may include an annular frame 51 and a plurality of spokes 52. One ends of the plurality of spokes 52 are connected, and the other ends of the plurality of spokes 52 are connected to the annular frame 51. By connecting the plurality of spokes 52, the mounting shaft 21 of the rotating fan 20 can be supported together. Providing the spokes 52 can reduce the obstruction to the airflow. Exemplarily, each fan mounting frame 50 may include 3 to 4 spokes 52, and the plurality of spokes 52 may be arranged at equal angles along the circumference of the annular frame 51, so that the mounting shaft 21 can be more stable and the vibration of the rotating fan 20 and the fan mounting frame 50 can be reduced.

[0045] In another implementation of the embodiment of the present invention, the fan mounting frame 50 may also only include the spokes 52, one end of the spokes 52 is connected to the inner wall of the collector ring 40, and the other end of the spokes 52 is connected.

[0046] Figure 5 1 is a schematic diagram of another fuel cell exhaust and drainage device provided by an embodiment of the present invention. Figure 5 As shown, the fuel cell exhaust and drainage device may further include a water collecting tank 60. The water collecting tank 60 is connected to the outer side wall of the installation tube 10, the water tank opening 60a of the water collecting tank 60 is connected to the drainage port 10a, and a drainage pipe 61 is connected to the water collecting tank 60. The water collecting tank 60 can serve as a base to support the installation tube 10, and can also collect water discharged from the drainage port 10a and discharge it through the drainage pipe 61.

[0047] The water collecting tank 60 may be fixedly connected to the mounting tube 10 , for example, by bolts.

[0048] Optionally, the fuel cell exhaust and drainage device may further include an annular end cap 70, which is detachably connected to an open end of the mounting barrel 10. The annular end cap 70 may be used to confine multiple muffler rings 30 and rotating fans 20 within the mounting barrel 10. The annular end cap 70 may be threadedly connected to the mounting barrel 10 or may be bolted.

[0049] Each structure in the fuel cell exhaust and drainage device, such as the mounting tube 10, the silencer ring 30, and the rotating fan 20, can be a hard structural part with a high density, such as a metal structural part or a plastic structural part. The high density of the manufacturing material can help reduce the vibration of each structure itself and avoid the fuel cell exhaust and drainage device itself from emitting a large noise. Since the gas entering the fuel cell exhaust and drainage device has a high temperature and high humidity, when using metal structural parts, rust-resistant metals, such as stainless steel, should be used to avoid rust.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel cell exhaust and drainage device, characterized in that: The utility model comprises a mounting tube (10), a rotating fan (20) and at least two silencer rings (30), wherein one end of the mounting tube (10) is closed and the other end of the mounting tube (10) is open, the closed end of the mounting tube (10) is connected to an air intake pipe (11), a drainage port (10a) is provided on a side wall of the mounting tube (10), each of the silencer rings (30) and the rotating fan (20) are coaxially mounted in the mounting tube (10), the silencer ring (30) is located between the air intake pipe (11) and the rotating fan (20), the silencer ring (30) has a conical inner wall, the end of the conical inner wall of the silencer ring (30) having a larger inner diameter is closer to the rotating fan (20), and among the adjacent silencer rings (30), the minimum inner diameter of the silencer ring (30) closer to the rotating fan (20) is smaller than that of the silencer ring (30) closer to the air intake pipe. (11), and, among the adjacent silencer rings (30), the minimum inner diameter of the silencer ring (30) closer to the rotating fan (20) is smaller than the minimum inner diameter of the silencer ring (30) closer to the intake pipe (11), so that a conical space is formed between the adjacent silencer rings (30), the space comprising a top and a bottom respectively located at opposite ends, the top of the space being the smaller end, and an end surface of the silencer ring (30) closer to the rotating fan (20) facing the intake pipe (11) being located at the bottom of the space and used for reflecting sound waves, the sound waves entering from the top of the space are reflected at the bottom of the space, and the reflected sound waves are reflected again on the conical inner wall of the space, so that the sound waves are reflected multiple times between the two adjacent silencer rings (30) and are absorbed; The end with a smaller inner diameter of each of the silencer rings (30) has a stopper (30c), and the stopper (30c) matches the end with a larger inner diameter of the silencer ring (30). When a plurality of the silencer rings (30) are assembled into the mounting tube (10), the plurality of the silencer rings (30) are clamped together via the stopper (30c).

2. The fuel cell exhaust and drainage device according to claim 1, characterized in that: A plurality of through holes (30a) are circumferentially distributed on the silencer ring (30) and communicate with the inner side wall and the outer side wall of the silencer ring (30).

3. The fuel cell exhaust and drainage device according to claim 2, characterized in that: An annular groove (30b) coaxial with the silencer ring (30) is provided on the outer side wall of the silencer ring (30), and the plurality of through holes (30a) are all located in the annular groove (30b).

4. The fuel cell exhaust and drainage device according to claim 1, characterized in that: Adjacent silencer rings (30) are detachably connected via stoppers.

5. The fuel cell exhaust and drainage device according to claim 1, characterized in that: The inner wall of the mounting cylinder (10) has an annular positioning flange (12), and the one of the silencer rings (30) closest to the air intake pipe (11) has a stopper (30c) matching the annular positioning flange (12).

6. The fuel cell exhaust and drainage device according to any one of claims 1 to 5, characterized in that: It also comprises a collecting ring (40), the inner wall of the collecting ring (40) having an annular flow guide groove (40a), the collecting ring (40) having a collecting hole (40b) connecting the annular flow guide groove (40a) and the outer wall of the collecting ring (40), the collecting ring (40) being coaxially disposed in the mounting tube (10), and the rotating fan (20) being mounted in the collecting ring (40).

7. The fuel cell exhaust and drainage device according to claim 6, characterized in that: Fan mounting frames (50) are respectively mounted on both ends of the collecting ring (40), a mounting shaft (21) is connected between the two fan mounting frames (50), and the rotating fan (20) is rotatably mounted on the mounting shaft (21).

8. The fuel cell exhaust and drainage device according to claim 7, characterized in that: The fan mounting frame (50) comprises an annular frame (51) and a plurality of spokes (52), one ends of the plurality of spokes (52) are connected, and the other ends of the plurality of spokes (52) are all connected to the annular frame (51).

9. The fuel cell exhaust and drainage device according to any one of claims 1 to 5, characterized in that: It also comprises a water collecting trough (60), the water collecting trough (60) being connected to the outer side wall of the installation cylinder (10), and a water trough opening (60a) of the water collecting trough (60) being in communication with the drainage port (10a).

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