Gas-water separation and sound elimination integrated device and fuel cell heat dissipation system

Abstract

The present application relates to the technical field of fuel cell, and discloses a gas-water separation and sound elimination integrated device and a fuel cell heat dissipation system. Airflow enters a first expansion cavity with a sharply increased cross section through an air inlet pipe, and then enters a water absorption and sound elimination assembly. A gas flow channel is formed between two adjacent flow channel plates of the water absorption and sound elimination assembly, and the gas flow channel is in a wave shape and penetrates along the airflow direction from the side of the air inlet pipe to the side of an air outlet pipe. The airflow in the gas flow channel is reflected by the wall surface of the flow channel plate for multiple times to achieve interference sound elimination. The contact between the airflow and the wall surface of the flow channel plate is conducive to water separation on the wall surface. After passing through the water absorption and sound elimination assembly, the airflow enters an expansion cavity one with a sharply increased cross section, and then enters a flow guide grid with a sharply decreased cross section for further gas-water separation. Then, the airflow enters an expansion cavity two with a sharply increased cross section, interference sound elimination is achieved by multiple reflections, and the sound elimination and gas-water separation effects are improved. The sound elimination and gas-water separation are integrated, the integration degree is high, and the occupied space is small.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and in particular to an integrated gas-water separation and noise reduction device and a fuel cell heat dissipation system. Background Technology

[0002] The water produced by the hydrogen fuel cell stack reaction has a maximum temperature of only about 90°C, and the heat carried by the stack exhaust and the radiant heat are also very small. Therefore, the heat generated during the operation of the hydrogen fuel cell is mainly carried away by the radiator, but this will undoubtedly increase the heat dissipation load of the vehicle's cooling system significantly.

[0003] Typically, compared to a fuel cell engine of the same power output, a fuel cell engine requires twice as much heat to be carried away by the coolant. This necessitates a corresponding increase in the heat dissipation area of ​​the radiator, the airflow of the cooling fan, and the effective ventilation area of ​​the entire vehicle. The heat dissipation area may even need to increase by more than 1.8 times, resulting in a larger radiator footprint. Furthermore, while increasing the number of radiators can meet the cooling requirements of the fuel cell engine, it increases the complexity of piping layout, which also increases the radiator's footprint.

[0004] Therefore, existing technologies typically employ a combination of water cooling and air cooling to cool the radiator. While using air cooling to cool the radiator, water mist is sprayed onto the heat exchanger to remove heat from the radiator surface. The water forming the spray is the water obtained after the gas-water mixture discharged from the air outlet of the fuel cell has been separated into gas and water by a gas-water separator.

[0005] However, using a gas-water separator for gas-water separation has the problem of high noise. Although the noise can be reduced by setting up a silencer, it will increase the space occupied by the entire fuel cell heat dissipation system. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated gas-water separation and noise reduction device and a fuel cell heat dissipation system, which can improve the gas-water separation effect and noise reduction effect, increase the integration of the fuel cell heat dissipation system, and reduce the space occupied by the fuel cell heat dissipation system.

[0007] To achieve this objective, the present invention employs the following technical solution:

[0008] The integrated gas-liquid separation and noise reduction device includes:

[0009] A detachable muffler housing is provided, wherein an air inlet pipe and an air outlet pipe are respectively connected to the opposite side walls of the detachable muffler housing;

[0010] A water-absorbing silencing component is disposed within the separation silencing housing and divides the inner cavity of the separation silencing housing into a first expansion cavity and a silencing separation cavity. The first expansion cavity is connected to the air inlet pipe. The water-absorbing silencing component includes a plurality of stacked flow channel plates, and a wave-shaped airflow channel is formed between two adjacent flow channel plates, which runs through the airflow direction from the side where the air inlet pipe is located to the side where the air outlet pipe is located.

[0011] A flow guide grille is provided inside the noise reduction separation chamber and divides the noise reduction separation chamber into an expansion chamber one and an expansion chamber two. The expansion chamber one is located between the water absorption noise reduction component and the flow guide grille, and the expansion chamber two is connected to the air outlet pipe.

[0012] As a preferred technical solution of the above-mentioned gas-water separation and noise reduction integrated device, a plurality of the flow channel plates are arranged at intervals along a preset horizontal direction perpendicular to the airflow direction, and the bottom of the expansion cavity one and the bottom of the expansion cavity two are connected.

[0013] As a preferred technical solution of the above-mentioned gas-water separation and noise reduction integrated device, the water absorption and noise reduction component further includes a water baffle plate corresponding to each of the airflow channels. The water baffle plate is disposed directly opposite the outlet of the airflow channel and is used to guide the water flowing out of the corresponding airflow channel to one side of the preset horizontal direction.

[0014] As a preferred technical solution of the above-mentioned gas-liquid separation and noise reduction integrated device, the surface of the flow channel plate is provided with a hydrophilic coating.

[0015] And / or, the water-absorbing and noise-absorbing assembly further includes a water-absorbing and noise-absorbing mesh, which is disposed on the side of the baffle plate near the expansion cavity.

[0016] As a preferred technical solution of the above-mentioned gas-water separation and noise reduction integrated device, the bottom of the expansion cavity two is provided with a drain outlet.

[0017] As a preferred technical solution of the above-mentioned integrated gas-water separation and noise reduction device, the air outlet of the air guide grille is inclined from top to bottom along the airflow direction;

[0018] And / or, along the direction of the airflow, the height of the inner bottom wall of the separation silencing housing gradually decreases, and the drain outlet is located at the lowest point of the inner bottom wall of the separation silencing housing.

[0019] To achieve the above objectives, the present invention also provides a fuel cell heat dissipation system, including the gas-water separation and noise reduction integrated device described in any of the above embodiments, wherein the air inlet pipe is used to connect to the exhaust port of the fuel cell stack.

[0020] The fuel cell cooling system also includes:

[0021] A radiator, wherein the medium inlet of the radiator is used to connect to the coolant outlet of the fuel cell stack, and the medium outlet of the radiator is used to connect to the coolant inlet of the fuel cell stack; the radiator has an upstream side and a downstream side arranged opposite to each other along the airflow direction;

[0022] A water storage tank is used to hold the liquid water separated by the gas-water separation and noise reduction integrated device.

[0023] A cooling fan that allows airflow to pass from the upstream side to the downstream side;

[0024] A heat dissipation atomization unit is used to atomize water into water mist and spray the water mist towards the upstream side of the radiator;

[0025] A spray water pump is used to deliver water from the water storage tank to the heat dissipation atomization unit;

[0026] A heating element is used to heat the water in the water storage tank.

[0027] As a preferred technical solution for the above-mentioned fuel cell heat dissipation system, the bottom of the expansion cavity two is provided with a drain outlet, and the water storage tank is located directly below the separate silencing shell and is connected to the expansion cavity two through the drain outlet.

[0028] As a preferred technical solution of the above-mentioned fuel cell heat dissipation system, it also includes a spray housing, and the spray water pump is disposed inside the spray housing;

[0029] The spray housing is located directly below the separation silencer housing and at the same end as the air inlet pipe on the separation silencer housing. The spray housing is connected to the separation silencer housing and the water storage tank.

[0030] As a preferred technical solution for the aforementioned fuel cell heat dissipation system, the heating component includes:

[0031] A heat exchanger, one end of which is connected to the coolant outlet of the fuel cell stack, and the other end of which is connected to the medium inlet of the radiator or is used to connect to the coolant inlet of the fuel cell stack; and / or,

[0032] An electric heating unit is used to heat the water in the water storage tank.

[0033] The beneficial effects of this invention are as follows: The gas-water separation and silencing integrated device and fuel cell heat dissipation system provided by this invention allow airflow to enter a first expansion cavity with a sharply increased cross-sectional area through an inlet pipe, and then enter a water-absorbing silencing component. This component includes multiple stacked flow channel plates, with a wave-shaped airflow channel formed between adjacent flow channel plates, running along the airflow direction from the side of the inlet pipe to the side of the outlet pipe. This allows the airflow to undergo multiple reflections through the walls of the flow channel plates within the airflow channel, achieving interference silencing. Furthermore, the contact between the airflow and the walls of the flow channel plates facilitates water separation. After passing through the water-absorbing silencing component, the airflow enters an expansion cavity with a sharply increased cross-sectional area (first expansion cavity), then a guide grid with a sharply decreased cross-sectional area for further gas-water separation, and finally enters an expansion cavity with a sharply increased cross-sectional area (second expansion cavity). This process utilizes multiple reflections for interference silencing, improving both silencing and gas-water separation effectiveness. By integrating silencing and gas-water separation, the integrated gas-water separation and silencing device achieves high integration and occupies minimal space. Attached Figure Description

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

[0035] Figure 1 This is a cross-sectional view of the gas-water separation and noise reduction integrated device provided in an embodiment of the present invention. Figure 1 ;

[0036] Figure 2 This is a cross-sectional view of the gas-water separation and noise reduction integrated device provided in an embodiment of the present invention. Figure 2 ;

[0037] Figure 3 This is a cross-sectional view of the gas-water separation and noise reduction integrated device provided in an embodiment of the present invention. Figure 3 ;

[0038] Figure 4 This is a schematic diagram of the first fuel cell heat dissipation system provided in the embodiments of the present invention;

[0039] Figure 5 This is a schematic diagram of the second fuel cell heat dissipation system provided in the embodiments of the present invention;

[0040] Figure 6 This is a schematic diagram of the third fuel cell heat dissipation system provided in the embodiments of the present invention;

[0041] Figure 7 This is a schematic diagram of the fourth fuel cell heat dissipation system provided in the embodiments of the present invention.

[0042] In the picture:

[0043] 1. Separate silencer housing; 11. First expansion chamber; 12. Expansion chamber one; 13. Expansion chamber two; 14. Drain outlet; 2. Air inlet pipe; 3. Air outlet pipe; 4. Water absorption silencer assembly; 41. Flow channel plate; 42. Water baffle plate; 43. Water absorption silencer mesh; 44. Airflow channel; 5. Guide grille;

[0044] 100. Gas-water separation and noise reduction integrated device; 200. Radiator; 300. Water storage tank; 400. Cooling fan; 500. Heat dissipation atomization unit; 600. Spray water pump; 700. Heat exchanger; 800. Spray shell; 900. Coolant control valve; 1000. Air storage tank; 1001. Heat dissipation atomization jet valve; 1002. Filter unit; 1003. Drainage atomization unit; 1004. Low temperature drainage atomization valve; 1005. Low temperature drainage jet valve; 1006. Drain valve; 1007. Heat dissipation atomization control valve; 1008. Electric heating unit; 1009. Fuel cell stack; 1010. Pressure reducing valve. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0046] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0049] like Figures 1 to 3 As shown, this embodiment provides an integrated air-water separation and silencing device, including a separation silencing housing 1, a water absorption silencing component 4, and a flow guide grille 5. The separation silencing housing 1 has an inlet pipe 2 and an outlet pipe 3 connected to opposite side walls. The water absorption silencing component 4 is disposed within the separation silencing housing 1 and divides the inner cavity of the separation silencing housing 1 into a first expansion chamber 11 and a silencing separation chamber. The first expansion chamber 11 is connected to the inlet pipe 2. The water absorption silencing component 4 includes multiple stacked flow channel plates 41, with a wave-shaped airflow channel 44 formed between adjacent flow channel plates 41, extending along the airflow direction from the side where the inlet pipe 2 is located to the side where the outlet pipe 3 is located. The flow guide grille 5 is disposed within the silencing separation chamber and divides the silencing separation chamber into an expansion chamber one 12 and an expansion chamber two 13. The expansion chamber one 12 is located between the water absorption silencing component 4 and the flow guide grille 5, and the expansion chamber two 13 is connected to the outlet pipe 3.

[0050] Airflow enters the first expansion cavity 11, whose cross-sectional area increases dramatically, through the inlet pipe 2. It then enters the water-absorbing silencing assembly 4, which includes multiple stacked flow channel plates 41. A wave-shaped airflow channel 44 is formed between adjacent flow channel plates 41, running along the airflow direction from the side of the inlet pipe 2 to the side of the outlet pipe 3. This allows the airflow to undergo multiple reflections through the walls of the flow channel plates 41 within the airflow channel 44, achieving interference silencing. Furthermore, the contact between the airflow and the walls of the flow channel plates 41 facilitates water separation. After passing through the water-absorbing silencing assembly 4, the airflow enters the first expansion cavity 12, whose cross-sectional area increases dramatically, and then enters the guide grille 5, whose cross-sectional area decreases dramatically, for further air-water separation. Finally, it enters the second expansion cavity 13, whose cross-sectional area increases dramatically, achieving interference silencing through multiple reflections and improving both silencing and air-water separation effects. By integrating silencing and air-water separation, the integrated air-water separation and silencing device 100 achieves high integration and occupies minimal space.

[0051] In some embodiments, multiple flow channel plates 41 are spaced apart along a preset horizontal direction perpendicular to the airflow direction. The bottom of expansion cavity one 12 and the bottom of expansion cavity two 13 are connected, so that the water formed by air-water separation in the water absorption and noise reduction assembly 4 falls to the bottom of the airflow channel 44 under the action of gravity and gathers at the outlet of the airflow channel 44, and then enters expansion cavity one 12. Since the bottom of expansion cavity one 12 and the bottom of expansion cavity two 13 are connected, the water in expansion cavity one 12 will gather in expansion cavity two 13.

[0052] In some embodiments, the water-absorbing silencing assembly 4 further includes a baffle plate 42 corresponding to each airflow channel 44. The baffle plate 42 is disposed directly opposite the outlet of the airflow channel 44 and is used to guide the water flowing out of the corresponding airflow channel 44 to one side in a preset horizontal direction. The baffle plate 42 is used to prevent the water flowing out of the airflow channel 44 from impacting the guide grille 5 and thus increasing the noise. Moreover, the baffle plate 42 can cause small water droplets in the airflow discharged from the airflow channel 44 to collect on the baffle plate 42 and fall to the bottom of the expansion cavity 12, and enter the expansion cavity 2 13 through the gap between the lower part of the baffle plate 42 and the inner bottom wall of the separation silencing housing 1.

[0053] In some other embodiments, multiple flow channel plates 41 can be arranged at intervals in the vertical direction, and the baffle plate 42 is used to guide the water flowing out of the corresponding airflow channel 44 to the bottom of the expansion cavity 12. The height of the baffle plate 42 gradually decreases along the airflow direction, and the baffle plate 42 is connected to the upper flow channel plate 41 of the two flow channel plates 41 that form the airflow channel 44.

[0054] In some embodiments, the surface of the flow channel plate 41 is provided with a hydrophilic coating, which facilitates the accumulation of water in the airflow discharged from the airflow channel 44 on the surface of the flow channel plate 41 and the formation of large water droplets, which fall to the bottom of the expansion cavity 12 under the action of gravity.

[0055] In some embodiments, the water-absorbing and sound-absorbing assembly 4 further includes a water-absorbing and sound-absorbing mesh 43, which is disposed on the side of the baffle plate 42 near the expansion cavity 12. The water-absorbing and sound-absorbing mesh 43 can not only perform sound absorption but also water absorption. For example, the water-absorbing and sound-absorbing mesh 43 is a steel wire mesh or a plastic mesh, etc.

[0056] In some embodiments, the outlet of the air guide grille 5 is inclined from top to bottom along the airflow direction. This facilitates the air guide grille 5 to condense small water droplets in the airflow into large water droplets, which then slide down into the expansion cavity 13 under the influence of gravity.

[0057] In some embodiments, in order to drain the water from the expansion cavity 13, the bottom of the expansion cavity 13 is provided with a drain outlet 14.

[0058] In some embodiments, along the airflow direction, the height of the inner bottom wall of the separation silencing housing 1 gradually decreases, and the drain outlet 14 is located at the lowest point of the inner bottom wall of the separation silencing housing 1. This facilitates the collection and discharge of water formed by air-water separation within the separation silencing housing 1 through the drain outlet 14. Optionally, the angle between the inner bottom wall of the separation silencing housing 1 and the horizontal plane is no greater than 5°. The angle between the inner bottom wall of the separation silencing housing 1 and the horizontal plane can be any value among 1°, 1.5°, 2°, 2.5°, 3°, 3.5°, 4°, 4.5°, and 5°. For example, the angle between the inner bottom wall of the separation silencing housing 1 and the horizontal plane is 1°.

[0059] like Figure 4 As shown, this embodiment of the invention also provides a fuel cell heat dissipation system, which is used to dissipate heat from the fuel cell stack 1009 to ensure the normal operation of the fuel cell stack 1009.

[0060] The fuel cell cooling system includes a radiator 200, a cooling fan 400, a water tank 300, a cooling atomizing unit 500, a spray water pump 600, and the aforementioned gas-water separation and silencing integrated device 100. The radiator 200's medium inlet is connected to the coolant outlet of the fuel cell stack 1009, and its medium outlet is connected to the coolant inlet of the fuel cell stack 1009. The radiator 200 has an upstream side and a downstream side arranged opposite to each other along the airflow direction. The cooling fan 400 allows airflow from the upstream side to the downstream side. The air inlet pipe 2 of the gas-water separation and silencing integrated device 100 is connected to the exhaust port of the fuel cell stack 1009. The water tank 300 holds the liquid water separated by the water absorption and silencing component 4. The cooling atomizing unit 500 atomizes the water to form a water mist and sprays the water mist towards the upstream side of the radiator 200. The spray water pump 600 delivers water from the water tank 300 to the cooling atomizing unit 500. For example, the heat dissipation atomizing unit 500 is an atomizing nozzle.

[0061] The high-temperature coolant discharged from the fuel cell stack 1009 enters the radiator 200 and is cooled by the cooling fan 400. After the coolant in the radiator 200 is cooled down, it flows back into the fuel cell stack 1009 to dissipate heat. The water separated by the air-water separation and noise reduction integrated device 100 is stored in the water storage tank 300. When the temperature of the coolant in the radiator 200 is high, if the cooling fan 400 cannot meet the heat dissipation requirements of the radiator 200, the water in the water storage tank 300 can be sent to the heat dissipation atomizing unit 500 while the cooling fan 400 is cooling the radiator 200. The heat dissipation atomizing unit 500 will form water mist and spray it onto the surface of the radiator 200, so that the water mist absorbs the heat emitted by the radiator 200. In addition, the cooling fan 400 enhances the air circulation around the radiator 200, which not only cools the radiator 200, but also helps the water mist absorb the heat on the surface of the radiator 200 and evaporate.

[0062] However, in practical applications, it has been found that the water mist sprayed onto the surface of the radiator 200 may accumulate on the outer surface of the radiator 200, affecting the heat dissipation from the surface of the radiator 200 and thus preventing the cooling effect of the radiator 200 from reaching the desired level. Therefore, this embodiment incorporates a heating component to heat the water in the water tank 300, thereby causing the heat dissipation atomizing unit 500 to spray out a higher-temperature water mist. This facilitates the evaporation of the water mist after absorbing heat from the surface of the radiator 200, preventing the accumulation of liquid water mist on the surface of the radiator 200 and thus improving the cooling effect of the radiator 200; it also helps to cool the coolant.

[0063] In some embodiments, the heating component includes a heat exchanger 700, one end of which is connected to the coolant outlet of the fuel cell stack 1009, and the other end is connected to the coolant inlet of the fuel cell stack 1009. This configuration allows the high-temperature coolant discharged from the fuel cell stack 1009 to heat the water in the water storage tank 300, while simultaneously allowing the low-temperature water in the water storage tank 300 to cool the coolant discharged from the fuel cell stack 1009. It should be noted that the other end of the heat exchanger 700 can also be connected to the medium inlet of the radiator 200, that is, the coolant after heat exchange with the water in the water storage tank 300 can be sent to the radiator 200.

[0064] In some embodiments, the heating assembly further includes an electric heating unit 1008 for heating the water in the water storage tank 300. Exemplarily, the electric heating unit 1008 is disposed on the inner bottom wall of the water storage tank 300. The structure of the electric heating unit 1008 can employ existing coil heating structures, etc., and is not specifically limited here. Furthermore, in low-temperature environments, the water in the water storage tank 300 may freeze. During fuel cell startup, the electric heating unit 1008 can be used to heat the water storage tank 300 to melt the ice.

[0065] In some embodiments, such as Figure 2 As shown, a heat dissipation atomization control valve 1007 is connected between the spray water pump 600 and the heat dissipation atomization unit 500. When it is necessary to spray the radiator 200 for heat dissipation, the heat dissipation atomization control valve 1007 is opened; when it is not necessary to spray the radiator 200 for heat dissipation, the heat dissipation atomization control valve 1007 is closed. For example, the heat dissipation atomization control valve 1007 is a solenoid valve.

[0066] In some embodiments, the fuel cell cooling system further includes a water temperature detection unit for detecting the inlet water temperature of the cooling atomization unit 500, so as to detect in real time whether the water temperature delivered to the cooling atomization unit 500 is appropriate. Exemplarily, the water temperature detection unit is located between the outlet of the spray water pump 600 and the inlet of the cooling atomization control valve 1007. The water temperature detection unit uses a temperature and pressure sensor, and the rotation speed of the spray water pump 600 is adjustable. The rotation speed of the spray water pump 600 can be adjusted according to the water pressure detected by the water temperature detection unit to ensure that the pressure of the water delivered to the cooling atomization unit 500 meets the requirements, thereby ensuring that the travel distance of the water mist sprayed by the cooling atomization unit 500 meets the requirements, which is beneficial to improving the heat exchange effect between the water mist and the radiator 200.

[0067] In some embodiments, such as Figure 2As shown, the fuel cell cooling system also includes a coolant control valve 900 and a coolant temperature detection unit. The inlet of the coolant control valve 900 is connected to the coolant outlet of the fuel cell stack 1009, and the outlet of the coolant control valve 900 can selectively connect to at least one of the medium inlets of the heat exchanger 700 and the radiator 200. The coolant temperature detection unit is used to detect the coolant temperature at the coolant outlet of the fuel cell stack 1009. Given a fixed maximum power of the cooling fan 400, a higher coolant temperature at the coolant outlet of the fuel cell stack 1009 places higher demands on the cooling capacity of the cooling fan 400. The activation of the heat dissipation atomization unit 500 is determined based on the coolant temperature at the coolant outlet of the fuel cell stack 1009. When the coolant temperature at the coolant outlet of the fuel cell stack 1009 is too high, exceeding the maximum heat dissipation capacity of the cooling fan 400, the heat dissipation atomization unit 500 can be activated. Through the coolant control valve 900, a portion of the coolant discharged from the coolant outlet of the fuel cell stack 1009 is sent into the heat exchanger 700. This not only raises the temperature of the water in the water tank 300 to improve the atomization effect of the heat dissipation atomization unit 500, but also lowers the temperature of the coolant.

[0068] When the heat dissipation atomization unit 500 is not required to work, a portion of the coolant discharged from the coolant outlet of the fuel cell stack 1009 can be sent into the heat exchanger 700 through the coolant control valve 900, so as to use the water in the water tank 300 to cool the coolant.

[0069] In some other embodiments, since the temperature of the water tank 300 is greatly reduced after the coolant in the heat exchanger 700 heats up the water tank 300, the heat exchanger 700 can also be connected to the medium inlet of the radiator 200. The cooled coolant in the heat exchanger 700 and the uncooled coolant are sent into the radiator 200 together, which can cool the coolant entering the radiator 200.

[0070] In some embodiments, such as Figure 5 As shown, the fuel cell cooling system also includes a gas storage tank 1000 and a heat dissipation atomizing jet valve 1001. The gas storage tank 1000 stores high-pressure gas, and is connected to the heat dissipation atomizing unit 500 via the heat dissipation atomizing jet valve 1001. Specifically, the inlet of the heat dissipation atomizing jet valve 1001 is connected to the gas storage tank 1000, and the outlet of the heat dissipation atomizing jet valve 1001 is connected to the inlet of the heat dissipation atomizing unit 500. For example, the high-pressure gas stored in the gas storage tank 1000 is compressed air.

[0071] When this fuel cell cooling system is used in a vehicle, an air compression unit, such as an air pump or air compressor, can be configured to compress air and store it in the air tank 1000. Specifically, the cooling atomizing unit 500 can be constructed by adding an air inlet for introducing high-pressure air to the structure of a conventional atomizing nozzle. The air inlet is connected to the atomizing channel of the atomizing nozzle. By introducing high-pressure gas into the atomizing channel through the air inlet, the atomization effect of the cooling atomizing unit 500 can be enhanced. This not only improves air circulation but also facilitates the evaporation of water mist, thereby preventing the formation of water droplets on the surface of the radiator 200. In other embodiments, the cooling atomizing jet valve 1001 can be connected to the jet head. The jet head is used to spray high-pressure gas around the nozzle of the atomizing nozzle, using the high-pressure gas to perform secondary atomization on the water mist that has just been sprayed, which facilitates the evaporation of the water mist.

[0072] It should be noted that the heat dissipation atomizing unit 500 can also adopt a mesh spray structure, a pipeline dot matrix spray structure, etc., which will not be described in detail here.

[0073] Optionally, the fuel cell cooling system further includes a pressure reducing valve 1010 to reduce the pressure of the high-pressure gas supplied from the gas storage tank 1000 to the cooling atomizing unit 500. Exemplarily, the pressure reducing valve 1010 is a solenoid valve.

[0074] Because the water storage tank has a limited storage capacity of 300 cubic meters, excess water needs to be drained during low winter temperatures. To prevent water from being directly discharged onto the road surface and causing it to freeze, in some embodiments, such as... Figure 6 As shown, the fuel cell cooling system also includes a liquid level detection unit and a drainage atomization unit 1003. The liquid level detection unit is used to detect the liquid level in the water tank 300. The inlet of the drainage atomization unit 1003 is connected between the outlet of the spray water pump 600 and the inlet of the cooling atomization unit 500 through a low-temperature drainage atomization valve 1004. For example, the liquid level detection unit is a liquid level sensor, and the drainage atomization unit 1003 is an atomizing nozzle. In low-temperature winter environments, if the liquid level detection unit detects that the water level in the water tank 300 is higher than the set maximum water level, and it is necessary to drain the excess water from the water tank 300, the low-temperature drainage atomization valve 1004 can be opened. The spray water pump 600 can then send the excess water from the water tank 300 to the drainage atomization unit 1003. The excess water in the water tank 300 is atomized by the drainage atomization unit 1003 and discharged in the form of water mist. Even if the water mist cools down and condenses into water droplets and then freezes, only small ice particles are formed, which will not affect vehicle operation.

[0075] It should be noted that when the above-mentioned fuel cell cooling system is used in a vehicle, the drainage atomizing unit 1003 can be installed at the upper part of the rear of the vehicle to preferentially discharge the spray to a higher position, which is conducive to the formation of small ice particles.

[0076] In some embodiments, such as Figure 7 As shown, the fuel cell cooling system also includes a cryogenic drainage jet valve 1005, the inlet of which is connected between the outlet of the pressure reducing valve 1010 and the inlet of the cooling atomizing jet valve 1001; the inlet of the drainage atomizing unit 1003 is connected to the outlet of the cryogenic drainage jet valve 1005. High-pressure gas is fed into the drainage atomizing unit 1003 through the cryogenic drainage jet valve 1005 to improve the atomization effect of the drainage atomizing unit 1003. Specifically, the drainage atomizing unit 1003 is provided with a high-pressure gas port for connecting to the outlet of the cryogenic drainage jet valve 1005. In other embodiments, the outlet of the cryogenic drainage jet valve 1005 can also be connected to a jet unit, which sprays high-pressure gas around the nozzle of the drainage atomizing unit 1003 to enhance airflow and prevent the water mist sprayed from the drainage atomizing unit 1003 from agglomerating into large water droplets, thus promoting the formation of small ice particles.

[0077] Since the water storage tank 300 has a limited water storage capacity, excess water needs to be drained during high summer temperatures. Therefore, in some embodiments, a drain valve 1006 can be installed at the bottom of the water storage tank 300. When the liquid level detection unit detects that the liquid level in the water storage tank 300 is too high, the excess water in the water storage tank 300 can be drained in a timely manner. Furthermore, the drain valve 1006 can also be opened to drain water from the water storage tank 300 when cleaning the water storage tank 300 is required or after the fuel cell is shut down in low-temperature environments. Exemplarily, the drain valve 1006 is a solenoid valve.

[0078] In some embodiments, such as Figures 4 to 7 As shown, the fuel cell cooling system also includes a filter unit 1002, which is connected between the water storage tank 300 and the spray water pump 600. The filter unit 1002 filters the water sent to the spray water pump 600 to prevent the spray water pump 600, the heat dissipation atomizing unit 500, the drainage atomizing unit 1003, etc. from becoming clogged.

[0079] In some embodiments, such as Figure 1 and Figure 2 As shown, the fuel cell cooling system also includes a spray housing 800, and a spray water pump 600 is located inside the spray housing 800. The spray housing 800 is located directly below the separation silencing housing 1 and at the same end as the air inlet pipe 2 on the separation silencing housing 1. The spray housing 800 is connected to the separation silencing housing 1 and the water storage tank 300. This design makes full use of the space below the separation silencing housing 1, improves the integration of the fuel cell cooling system, and reduces the space occupied by the fuel cell cooling system.

[0080] In some embodiments, such as Figures 4 to 7As shown, the fuel cell cooling system also includes a filter unit 1002, which is connected between the water storage tank 300 and the spray water pump 600. The filter unit 1002 filters the water sent to the spray water pump 600 to prevent clogging of the spray water pump 600, the heat dissipation atomizing unit 500, the drainage atomizing unit 1003, etc. Optionally, the filter unit 1002 is located inside the spray housing 800 to improve the system integration and reduce the space occupied.

[0081] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An integrated device for gas-water separation and noise reduction, characterized in that, include: Separate silencer housing (1), with an air inlet pipe (2) and an air outlet pipe (3) respectively connected to the opposite side walls of the separate silencer housing (1); A water-absorbing silencing component (4) is disposed inside the separation silencing housing (1) and divides the inner cavity of the separation silencing housing (1) into a first expansion cavity (11) and a silencing separation cavity. The first expansion cavity (11) is connected to the air inlet pipe (2). The water-absorbing silencing component (4) includes a plurality of stacked flow channel plates (41). A wave-shaped airflow channel (44) is formed between two adjacent flow channel plates (41) and runs through the airflow direction from the side where the air inlet pipe (2) is located to the side where the air outlet pipe (3) is located. A flow guide grille (5) is provided in the silencing separation chamber and divides the silencing separation chamber into an expansion chamber one (12) and an expansion chamber two (13). The expansion chamber one (12) is located between the water absorption silencing component (4) and the flow guide grille (5). The expansion chamber two (13) is connected to the air outlet pipe (3). Multiple flow channel plates (41) are arranged at intervals along a preset horizontal direction perpendicular to the airflow direction, and the bottom of expansion cavity one (12) and the bottom of expansion cavity two (13) are connected. The water-absorbing and noise-reducing component (4) also includes a water baffle (42) corresponding to the airflow channel (44). The water baffle (42) is disposed directly opposite to the outlet of the airflow channel (44). The water baffle (42) is used to guide the water flowing out of the corresponding airflow channel (44) to one side of the preset horizontal direction. The bottom of the expansion cavity 2 (13) is provided with a drain outlet (14).

2. The integrated gas-water separation and noise reduction device according to claim 1, characterized in that, The surface of the flow channel plate (41) is provided with a hydrophilic coating; And / or, the water-absorbing and sound-absorbing assembly (4) further includes a water-absorbing and sound-absorbing mesh (43), which is disposed on the side of the baffle plate (42) near the expansion cavity (12).

3. The integrated gas-water separation and noise reduction device according to claim 1, characterized in that, Along the airflow direction, the air outlet of the guide grille (5) is inclined from top to bottom; And / or, along the direction of the airflow, the height of the inner bottom wall of the separation silencing housing (1) gradually decreases, and the drain outlet (14) is opened at the lowest position of the inner bottom wall of the separation silencing housing (1).

4. A fuel cell cooling system, characterized in that, Includes the gas-water separation and silencing integrated device (100) according to any one of claims 1 to 3, wherein the air inlet pipe (2) is used to connect to the exhaust port of the fuel cell stack (1009); The fuel cell cooling system also includes: A radiator (200) has a medium inlet for connecting to the coolant outlet of a fuel cell stack (1009) and a medium outlet for connecting to the coolant inlet of the fuel cell stack (1009); the radiator (200) has an upstream side and a downstream side arranged opposite to each other along the airflow direction. A water storage tank (300) is used to hold the liquid water separated by the gas-water separation and noise reduction integrated device (100); A cooling fan (400) is provided that enables airflow from the upstream side to the downstream side; A heat dissipation atomizing unit (500) is used to atomize water into water mist and spray the water mist towards the upstream side of the radiator (200); A spray water pump (600) is used to deliver water in the water storage tank (300) to the heat dissipation atomizing unit (500). A heating component is used to heat the water in the water storage tank (300).

5. The fuel cell heat dissipation system according to claim 4, characterized in that, The bottom of the expansion cavity 2 (13) is provided with a drain outlet (14), and the water storage tank (300) is located directly below the separation silencing shell (1) and is connected to the expansion cavity 2 (13) through the drain outlet (14).

6. The fuel cell heat dissipation system according to claim 5, characterized in that, It also includes a spray housing (800), and the spray water pump (600) is disposed inside the spray housing (800); The spray housing (800) is located directly below the separation silencing housing (1) and at the same end as the air inlet pipe (2) on the separation silencing housing (1). The spray housing (800) is connected to the separation silencing housing (1) and the water storage tank (300).

7. The fuel cell heat dissipation system according to claim 4, characterized in that, The heating component includes: A heat exchanger (700), one end of which is connected to the coolant outlet of the fuel cell stack (1009), and the other end is connected to the medium inlet of the radiator (200) or to the coolant inlet of the fuel cell stack (1009); and / or, An electric heating unit (1008) is used to heat the water in the water storage tank (300).

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