A radiator for fuel cells with integrated gas-liquid separation

Abstract

The application relates to the field of fuel cell heat dissipation technology, in particular to a fuel cell radiator integrated with gas-liquid separation, which comprises a heat dissipation box, a fan fixed at the side end of the heat dissipation box, a spiral coil pipe fixed in the heat dissipation box, a water storage box fixed in the heat dissipation box, and a sealing discharge mechanism connected with the gas-liquid separation mechanism arranged on the water storage box. When the gas-liquid mixture airflow is transported in the spiral coil pipe, the water vapor is cooled under the action of air cooling; when the airflow passes through the gas-liquid separation mechanism, the airflow is accelerated under the action of the gas-liquid separation mechanism, and the gas-liquid separation is realized under the action of centrifugal force; meanwhile, the residual water mist is blocked to flow back and be guided into the sealing discharge mechanism, so that the gas-liquid separation effect is realized.

Description

Technical Field

[0001] This invention relates to the field of fuel cell heat dissipation technology, specifically a heat sink for fuel cells with integrated gas-liquid separation. Background Technology

[0002] During operation, fuel cell systems, especially proton exchange membrane fuel cells, generate a large amount of water on the cathode side of the stack. At the same time, unreacted air is also discharged with the exhaust gas, forming a high-temperature gas-liquid mixture. This mixture needs to be cooled by a radiator to maintain the appropriate operating temperature of the fuel cell system and protect subsequent precision components such as air pumps.

[0003] In existing technologies, radiators for fuel cells mainly adopt forced air cooling or liquid cooling tubular structures. Their gas-liquid separation function usually relies on gravity settling, that is, an expansion container or settling chamber is set downstream or inside the radiator, and the density difference between gas and liquid droplets is used to allow larger liquid droplets to settle and separate naturally under the action of gravity.

[0004] However, traditional radiator flow channel design prioritizes heat exchange, with gas-liquid separation serving only as an auxiliary function. The gas has a short residence time in the radiator, and tiny droplets are carried out by the airflow before they can condense or settle. This causes the air pump to draw in liquid-containing gas, and under long-term operation, high-speed droplets will impact and damage the membrane electrode, seriously affecting the life and reliability of the fuel cell stack.

[0005] To address this, a spiral coil can be used to transport airflow to achieve heat dissipation and gas-liquid separation. When airflow is transported through a spiral coil, the residence time of the airflow in the radiator can be increased. At the same time, under the action of centrifugal force, the precipitated water droplets can be separated from the gas, thereby achieving the effect of gas-liquid separation. However, if the airflow velocity inside the spiral coil is slow, the centrifugal force generated is insufficient to separate water droplets from the gas. When the airflow inside the spiral coil is high-speed, the separated water droplets are easily entrained in the airflow again, resulting in incomplete gas-liquid separation. Summary of the Invention

[0006] The purpose of this invention is to provide a heat sink for fuel cells with integrated gas-liquid separation, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A heat sink for a fuel cell with integrated gas-liquid separation, comprising: A heat sink, and a fan fixed to the side of the heat sink; Also includes: A spiral coil is fixed inside the heat dissipation box. A gas-liquid separation mechanism is provided on the spiral coil. The gas-liquid separation mechanism can perform a convergence and flow-blocking action on the mixture when the spiral coil is conveying the gas-liquid mixture. A water storage box is fixed inside the heat dissipation box. The water storage box is equipped with a sealing discharge mechanism connected to the gas-liquid separation mechanism. The sealing discharge mechanism can separate gas and liquid and guide the liquid to be transported into the water storage box.

[0008] As a further aspect of the present invention: a plurality of liquid outlets are formed on the spiral coil, and the liquid outlets are located at the lowest point of each turn of the spiral coil along the direction of gravity.

[0009] As a further embodiment of the present invention: the gas-liquid separation mechanism includes a plurality of conveying pipes fixed on the spiral coil, the conveying pipes being connected to the liquid outlet, a manifold being connected to the conveying pipes, and a discharge pipe being fixed on the spiral coil, the discharge pipe being connected to the manifold and the liquid outlet; It also includes a converging component and a flow-blocking component disposed within the spiral coil.

[0010] As a further embodiment of the present invention: the converging assembly includes a converging cone ring fixed inside the spiral coil, the converging cone ring being located upstream of the liquid outlet, and the inner wall of the converging cone ring being provided with a trapezoidal guide groove for guiding airflow acceleration and droplet flow.

[0011] As a further embodiment of the present invention: the flow-blocking assembly includes a flow-blocking cone ring fixed inside the spiral coil, the flow-blocking cone ring being located downstream of the liquid outlet, and the inner wall of the flow-blocking cone ring being provided with a flow-blocking groove for blocking fine water mist and causing it to coalesce and flow back.

[0012] As a further embodiment of the present invention: the sealing and discharging mechanism includes a liquid storage pipe fixed to the end of the discharging pipe and connected to the discharging pipe, a discharging hole is formed on the outer circumference of the liquid storage pipe, a sealing pipe is fixed on the outer circumference of the liquid storage pipe and connected to the discharging hole, and the sealing pipe is connected to the water storage box; It also includes a limiting component and an elastic component disposed inside the liquid storage tube and cooperating with the discharge hole.

[0013] As a further embodiment of the present invention: the limiting component includes a push rod slidably installed inside the liquid storage tube, and a limiting ring fixed on the push rod that abuts against the end of the liquid storage tube.

[0014] As a further embodiment of the present invention: the elastic component includes a piston disc fixed to the end of the push rod and slidably and sealingly connected to the liquid storage tube, a sealing ring fixed on the piston disc and communicating with the discharge hole, and a spring sleeved on the push rod, the two ends of the spring respectively abutting against the piston disc and the inner wall of the liquid storage tube.

[0015] As a further embodiment of the present invention: a spray ring is fixed on the water storage box, a return pipe connected to the spray ring is connected to the water storage box, and a plurality of atomizing nozzles are connected to the spray ring in a circumferentially equidistant manner.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention utilizes the vortex structure of the spiral coil to continuously subject the gas-liquid mixture to centrifugal force during flow. Combined with the dual mechanisms of accelerated centrifugal ejection by the converging cone ring and the blocking and collection backflow by the choke cone ring, it achieves highly efficient capture of micron-sized fine water mist. First, the converging cone ring accelerates the airflow through the gradually narrowing channel, enhancing the local centrifugal force, causing the fine droplets to be forcefully thrown towards the tube wall. The trapezoidal guide groove on its inner wall guides the collected droplets, preventing them from being entrained by the high-speed airflow. Subsequently, the choke cone ring physically intercepts the remaining fine water mist, causing small droplets to coalesce into larger droplets on the choke surface and in the choke groove, and flow back to the outlet. Through the above synergistic effect, the present invention significantly improves the capture efficiency of fine liquid water in the exhaust gas without overly relying on gravity settling, effectively reducing the risk of liquid water entering the downstream gas path and causing flooding of the membrane electrode or affecting the reliability of components such as the air pump.

[0017] By combining the dynamic water seal in the storage tube with the static U-shaped water seal in the sealing tube, automatic quantitative discharge of condensate is achieved. During the discharge process, the dual water seal mechanism can effectively isolate internal gas from being discharged with the water, avoiding gas leakage or pressure fluctuations caused by drainage, and ensuring the stability and airtightness of the fuel cell system back pressure.

[0018] The condensate collected in the water storage box is sprayed onto the outer wall of the spiral coil through the atomizing nozzle under the action of the fan airflow, forming a synergistic effect of air cooling and evaporative water cooling. This improves the heat exchange rate inside the heat exchange box, allowing the high-temperature and humid air inside the spiral coil to cool down rapidly in a very short time, promoting the full phase change and condensation of water vapor, thereby further improving the gas-liquid separation efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment of a heat sink for a fuel cell with integrated gas-liquid separation.

[0020] Figure 2 This is a front view schematic diagram of a heat sink for a fuel cell with integrated gas-liquid separation in one embodiment.

[0021] Figure 3 This is a schematic diagram of the internal structure of the heat sink in one embodiment of a heat sink for a fuel cell with integrated gas-liquid separation.

[0022] Figure 4 This is a schematic cross-sectional view of a spiral coil in one embodiment of a heat sink for a fuel cell with integrated gas-liquid separation.

[0023] Figure 5 This is a partial cross-sectional schematic diagram of the spiral coil and liquid storage pipe in one embodiment of a heat sink for a fuel cell with integrated gas-liquid separation.

[0024] Figure 6 This is a schematic diagram of the structure of the radiator for a fuel cell with integrated gas-liquid separation in one embodiment.

[0025] Figure 7 This is an exploded structural diagram of the sealed emission mechanism in one embodiment of a radiator for a fuel cell with integrated gas-liquid separation.

[0026] In the diagram: 1. Heat sink; 2. Fan; 3. Spiral coil; 4. Delivery pipe; 5. Manifold; 6. Discharge pipe; 7. Liquid storage pipe; 701. Discharge hole; 8. Piston disc; 9. Sealing ring; 10. Push rod; 1001. Limiting ring; 11. Spring; 12. Sealing pipe; 13. Water storage box; 14. Return pipe; 15. Spray ring; 16. Atomizing nozzle; 17. Manifold cone ring; 1701. Trapezoidal guide groove; 18. Flow-blocking cone ring; 1801. Flow-blocking groove. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0029] Please see Figures 1-7 In this embodiment of the invention, a heat sink for a fuel cell with integrated gas-liquid separation includes: A heat sink 1, and a fan 2 fixed to the side of the heat sink 1; Also includes: The spiral coil 3 is fixed inside the heat dissipation box 1. The spiral coil 3 is equipped with a gas-liquid separation mechanism. The gas-liquid separation mechanism can perform a convergence and flow-blocking action on the mixture when the spiral coil 3 is conveying the gas-liquid mixture. A water storage box 13 is fixed inside the heat dissipation box 1. The water storage box 13 is provided with a sealing discharge mechanism connected to the gas-liquid separation mechanism. The sealing discharge mechanism can separate gas and liquid and guide the liquid to be transported into the water storage box 13.

[0030] The spiral coil 3 has multiple liquid outlets, which are located at the lowest point of each turn of the spiral coil 3 along the direction of gravity.

[0031] Specifically, during gas-liquid separation of the airflow, liquid and gas can be separated through cooling and centrifugal force. When the high-temperature airflow is pumped into the spiral coil 3, it flows along the vortex trajectory of the spiral coil 3. Simultaneously, the fan 2 cools the airflow within the spiral coil 3, causing water vapor to cool and form water droplets. Under the combined action of centrifugal force and gravity, some water droplets adhere to the lowest point along the direction of gravity in each coil of the spiral coil 3. At this point, the separated water enters the gas-liquid separation mechanism through the liquid outlet. The gas is then transported to the sealed discharge mechanism. To ensure thorough gas-liquid separation, the gas-liquid separation mechanism accelerates the gas flow when it passes through the convergence and obstruction point, increasing the centrifugal force at the acceleration point to cause the water droplets to converge. At the same time, the gas-liquid separation mechanism also blocks the water droplets, causing them to gather and flow back, thus ensuring more thorough gas-liquid separation. The water entering the sealed discharge mechanism will form a water seal, preventing the gas from leaving the spiral coil 3. When the water volume in the sealed discharge mechanism reaches the set value, the water can be automatically transported to the water storage box 13.

[0032] Please see Figures 1-6The gas-liquid separation mechanism includes multiple conveying pipes 4 fixed on the spiral coil 3, the conveying pipes 4 being connected to the liquid outlet, and a manifold 5 connected to the conveying pipes 4. A discharge pipe 6 is also fixed on the spiral coil 3, and the discharge pipe 6 is connected to the manifold 5 and the liquid outlet. It also includes a converging component and a flow-blocking component disposed within the spiral coil 3. The converging component includes a converging cone ring 17 fixed within the spiral coil 3, located upstream of the liquid outlet. The inner wall of the converging cone ring 17 is provided with a trapezoidal guide groove 1701 for guiding airflow acceleration and droplet flow. The flow-blocking component includes a flow-blocking cone ring 18 fixed within the spiral coil 3, located downstream of the liquid outlet. The inner wall of the flow-blocking cone ring 18 is provided with a flow-blocking groove 1801 for blocking fine water mist and causing it to coalesce and flow back.

[0033] In detail, the spiral coil 3 is arranged in a vortex shape. The airflow contains water vapor. As the water vapor cools, it will be released from the gas and form water droplets. Under the action of centrifugal force and gravity, the water droplets will adhere to the outer periphery of the inner wall of the spiral coil 3. The manifold cone ring 17 is arranged in the shape of an arc cylinder, and the radius of the end section is equal to the radius of the inner wall of the spiral coil 3. The center of the manifold cone ring 17 is opened with a cone hole along its own arc trajectory, and the cone hole at the end closer to the liquid outlet has the smallest diameter, while the cone hole at the end farther away from the liquid outlet has the largest diameter. The trapezoidal guide groove 1701 is arranged in the shape of an inverted trapezoid and is connected to the central cone hole. The trapezoidal guide groove 1701 is in contact with the outer periphery of the inner wall of the spiral coil 3. The flow-blocking cone ring 18 is set in a semi-circular cylindrical shape, that is, the spiral coil 3 is in a fully open state on the upper side of the flow-blocking cone ring 18 to provide unobstructed airflow. The flow-blocking groove 1801 formed on the flow-blocking cone ring 18 does not completely penetrate the flow-blocking cone ring 18. Therefore, a flow-blocking surface is left on the side of the flow-blocking cone ring 18 away from the liquid outlet, and the flow-blocking groove 1801 is also set in an inverted trapezoidal shape to achieve a gathering effect on the blocked water droplets. Please see Figure 4 The spiral coil 3 has multiple turns. When the airflow is pumped into the spiral coil 3, the airflow will flow along the vortex trajectory of the spiral coil 3. During the flow, the gas-liquid mixture is continuously subjected to centrifugal force generated along the spiral tangential direction. At the same time, the fan 2 located at the side of the heat sink 1 runs at high speed to force-cool the inside of the spiral coil 3. As the airflow temperature drops significantly, the gaseous water vapor gradually undergoes a phase change and condenses, precipitating into tiny water droplets. Under the combined action of centrifugal force and gravity, these water droplets tend to adhere to the inner wall of the outer ring of the spiral coil 3 and sink naturally. They eventually collect effectively at the lowest point along the direction of gravity in each ring of the spiral coil 3. The collected liquid water flows out from the outlet at this point and is guided by the conveying pipe 4 and the manifold 5 to be uniformly transported to the discharge pipe 6 located at the outermost ring of the spiral coil 3. Please see Figure 5 , Figure 6 To ensure thorough and efficient gas-liquid separation, when the gas flows through the confluence ring 17, the water droplets, being much denser than the gas, mainly accumulate on the outer periphery of the inner wall of the spiral coil 3 under the combined action of centrifugal force and gravity. Meanwhile, the lighter pure gas remains stable in the central region of the flow channel of the spiral coil 3. As the gas enters the confluence ring 17 with its gradually narrowing aperture, the cross-sectional area of ​​the flow channel gradually decreases, and the gas velocity increases sharply, significantly enhancing the centrifugal force intensity at this point. This causes some of the fine water droplets originally entrained in the gas flow to be forcefully thrown towards the outer periphery of the tube wall. These thrown-out water droplets slide down the inclined surface of the trapezoidal guide groove 1701 on the inner wall of the confluence ring 17 and rapidly converge into large-diameter droplets within the inverted trapezoidal groove structure. This effectively guides the water droplets toward the liquid outlet, avoiding secondary entrainment caused by the high-speed gas flow after separation, and significantly improving the front-end separation efficiency. The gas-liquid mixture continues to flow, passing through the outlet area and entering the section where the flow-blocking cone ring 18 is located downstream. At this time, since there may still be a small amount of fine water mist that has not been thrown out in the airflow, when the airflow flows through the flow-blocking cone ring 18, since the ring is only set on the lower half of the inner wall of the spiral coil 3, and its upper half remains unobstructed, the main airflow can pass smoothly with a low pressure drop, effectively ensuring the overall low back pressure characteristics. The residual fine water mist, due to inertia, tends to flow along the outer periphery of the inner wall of the spiral coil 3 under the action of the airflow, and directly impacts the flow-blocking surface of the flow-blocking cone ring 18. Under the surface tension of the water droplets and the inverted trapezoidal collection action of the flow-blocking groove 1801, the intercepted water droplets quickly coalesce into large water droplets, and under the action of gravity, they flow back along the structure to the outlet at the front end, and are finally discharged by the discharge pipe 6. In this way, through the dual effects of front-end accelerated centrifugal ejection and rear-end blocking and collection backflow, the maximum separation of the gas-liquid mixture is achieved while ensuring low flow resistance. This effectively prevents liquid water from being carried into the downstream air compressor by negative pressure, thereby avoiding physical impact damage to the fuel cell membrane electrode by high-speed water droplets and significantly extending the service life of the fuel cell stack.

[0034] Please see Figure 3 , Figure 4 , Figure 7The sealing and discharging mechanism includes a liquid storage pipe 7 fixed to the end of the discharge pipe 6 and connected to the discharge pipe 6. A discharge hole 701 is formed on the outer circumference of the liquid storage pipe 7. A sealing pipe 12 connected to the discharge hole 701 is fixed on the outer circumference of the liquid storage pipe 7. The sealing pipe 12 is connected to the water storage box 13. The mechanism also includes a limiting component and an elastic component disposed in the liquid storage pipe 7 and cooperating with the discharge hole 701. The limiting component includes a push rod 10 slidably installed in the liquid storage pipe 7. A limiting ring 1001 that abuts against the end of the liquid storage pipe 7 is fixed on the push rod 10. The elastic component includes a piston disc 8 fixed to the end of the push rod 10 and slidably and sealingly connected to the liquid storage pipe 7. A sealing ring 9 that conducts through the discharge hole 701 is fixed on the piston disc 8. A spring 11 is sleeved on the push rod 10. The two ends of the spring 11 abut against the piston disc 8 and the inner wall of the liquid storage pipe 7, respectively.

[0035] Please see Figure 3 A spray ring 15 is fixed on the water storage box 13, and a return pipe 14 connected to the spray ring 15 is connected to the water storage box 13. A plurality of atomizing nozzles 16 are connected to the spray ring 15 in a circumferentially equidistant manner.

[0036] Furthermore, to prevent gas from being discharged through the outlet when water after gas-liquid separation is transported through the outlet, a seal needs to be installed in the discharge pipeline to ensure that only water is discharged from the discharge pipeline. The sealing ring 9 is slidably sealed to the inner wall of the liquid storage tube 7. In the initial state, no water enters the liquid storage tube 7. At this time, the piston disc 8 is located at the end of its stroke near the discharge tube 6 when the end of the piston disc 8 away from the push rod 10 is not acted upon. That is, the distance between the piston disc 8 and the end of the liquid storage tube 7 away from the discharge tube 6 is the largest. The extension of the spring 11 in its natural state is greater than the maximum distance between the piston disc 8 and the end of the liquid storage tube 7 away from the discharge tube 6. Therefore, the spring 11 is in a pre-compressed state and always provides the piston disc 8 with a thrust towards the side near the discharge tube 6. In this state, the piston disc 8 controls the limiting ring 1001 to abut against the end of the liquid storage tube 7 through the push rod 10. The piston disc 8 also seals the discharge hole 701 through the sealing ring 9. When the airflow flows in the spiral coil 3 and the airflow is treated by gas-liquid separation, the water will be collected in the discharge pipe 6 through the delivery pipe 4 and the manifold 5, and then transported to the storage pipe 7 through the discharge pipe 6. The water will be collected above the piston plate 8. As the amount of water gradually increases, the water level above the piston plate 8 in the storage pipe 7 continues to rise. The liquid surface formed by the water above the piston plate 8 will effectively block the path of gas escaping from the discharge pipe 6, forming the first dynamic water seal. As water continues to accumulate, the gravity of the water will gradually overcome the preload thrust applied to the piston disc 8 by the spring 11. When the amount of water in the reservoir 7 reaches the set threshold, the gravity of the water forces the piston disc 8 and the push rod 10 to slide downwards in a direction away from the discharge pipe 6. During this process, the push rod 10 drives the limiting ring 1001 to disengage from the end of the reservoir 7, and at the same time, the piston disc 8 drives the sealing ring 9 to pass directly over the position of the discharge hole 701, and the discharge hole 701 is gradually opened. At this time, the water accumulated in the storage pipe 7 flows into the sealing pipe 12 quickly through the discharge hole 701 by gravity, and is eventually guided and transported to the water storage box 13. As the water in the storage pipe 7 is discharged, when the water volume drops to a level that is insufficient to overcome the elastic force of the spring 11, the thrust of the spring 11 pushes the piston plate 8 to move closer to the discharge pipe 6, and drives the sealing ring 9 to re-seal the discharge hole 701, so that the system returns to the initial sealed state. During the drainage process, the sealing tube 12 and the storage tube 7 cooperate to form a U-shaped flow channel, so that a certain amount of liquid is always present in the sealing tube 12. This liquid forms a second reliable static water seal. Even if there is a brief liquid level fluctuation in the storage tube 7 due to drainage, the second water seal in the U-shaped flow channel can still effectively isolate the gas and work together with the first dynamic water seal above to greatly avoid gas leakage, thereby improving the sealing reliability of the system after gas-liquid separation. The water storage box 13 is equipped with a water pump, which can be connected to an external water source or to the water storage box 13. While the fan 2 is cooling the spiral coil 3, in order to further accelerate the condensation of water vapor in the airflow, the water pump can pump the condensate collected in the water storage box 13 to the return pipe 14 and then to the spray ring 15. The condensate entering the spray ring 15 will be evenly distributed into multiple atomizing nozzles 16 that are circumferentially equidistant and sprayed outward. Since the atomizing nozzles 16 are inclined relative to the spiral coil 3 and the spray direction is directly towards the outer wall of the spiral coil 3, under the forced airflow generated by the fan 2, the atomized fine water droplets can evenly cover and adhere to the surface of the spiral coil 3 and quickly absorb heat and evaporate. In this way, through the synergistic cooperation of water cooling and air cooling, the heat exchange rate inside the heat sink 1 is greatly improved, causing the water vapor in the airflow to condense and precipitate in a very short time, thereby ensuring the comprehensiveness of gas-liquid separation.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat sink for a fuel cell with integrated gas-liquid separation, comprising: A heat sink, and a fan fixed to the side of the heat sink; Its characteristic is that it further includes: A spiral coil is fixed inside the heat dissipation box. A gas-liquid separation mechanism is provided on the spiral coil. The gas-liquid separation mechanism can perform a convergence and flow-blocking action on the mixture when the spiral coil is conveying the gas-liquid mixture. A water storage box is fixed inside the heat dissipation box. The water storage box is equipped with a sealing discharge mechanism connected to the gas-liquid separation mechanism. The sealing discharge mechanism can separate gas and liquid and guide the liquid to be transported into the water storage box.

2. The integrated gas-liquid separation heat sink for a fuel cell according to claim 1, characterized in that, The spiral coil has multiple liquid outlets, which are located at the lowest point of each turn of the spiral coil along the direction of gravity.

3. A heat sink for a fuel cell with integrated gas-liquid separation according to claim 2, characterized in that, The gas-liquid separation mechanism includes multiple conveying pipes fixed on the spiral coil, the conveying pipes being connected to the liquid outlet, a manifold being connected to the conveying pipes, and a discharge pipe being fixed on the spiral coil, the discharge pipe being connected to the manifold and the liquid outlet; It also includes a converging component and a flow-blocking component disposed within the spiral coil.

4. A heat sink for a fuel cell with integrated gas-liquid separation according to claim 3, characterized in that, The converging assembly includes a conical ring fixed inside the spiral coil. The conical ring is located upstream of the liquid outlet, and the inner wall of the conical ring is provided with a trapezoidal guide groove for guiding airflow acceleration and droplet flow.

5. A heat sink for a fuel cell with integrated gas-liquid separation according to claim 3, characterized in that, The flow-blocking assembly includes a flow-blocking cone ring fixed inside the spiral coil. The flow-blocking cone ring is located downstream of the liquid outlet. The inner wall of the flow-blocking cone ring is provided with a flow-blocking groove for blocking fine water mist and causing it to coalesce and flow back.

6. A heat sink for a fuel cell with integrated gas-liquid separation according to claim 3, characterized in that, The sealing and discharging mechanism includes a liquid storage pipe fixed to the end of the discharge pipe and connected to the discharge pipe. A discharge hole is formed on the outer circumference of the liquid storage pipe. A sealing pipe connected to the discharge hole is fixed on the outer circumference of the liquid storage pipe. The sealing pipe is connected to the water storage box. It also includes a limiting component and an elastic component disposed inside the liquid storage tube and cooperating with the discharge hole.

7. A heat sink for a fuel cell with integrated gas-liquid separation according to claim 6, characterized in that, The limiting component includes a push rod that is slidably installed inside the liquid storage tube, and a limiting ring that abuts against the end of the liquid storage tube is fixed on the push rod.

8. A heat sink for a fuel cell with integrated gas-liquid separation according to claim 7, characterized in that, The elastic component includes a piston disc fixed to the end of the push rod and slidably sealed to the liquid storage tube. A sealing ring that is in communication with the discharge hole is fixed on the piston disc. A spring is sleeved on the push rod, and the two ends of the spring abut against the piston disc and the inner wall of the liquid storage tube, respectively.

9. A heat sink for a fuel cell with integrated gas-liquid separation according to claim 1, characterized in that, A spray ring is fixed on the water storage box, and a return pipe connected to the spray ring is connected to the water storage box. Multiple atomizing nozzles are connected to the spray ring in a circumferentially equidistant manner.

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