A water vapor separation heat exchange assembly and fuel cell air supply system

Abstract

The present invention discloses a water vapor separation heat exchange assembly and a fuel cell air supply system. The water vapor separation heat exchange assembly includes an outer shell and an inner core. The outer shell is provided with a guide cavity, and the air inlet and outlet ports are arranged in the tangential direction of the guide cavity. The inner core is coaxially arranged in the guide cavity and forms a cold air flow channel with the inner peripheral wall of the guide cavity. The inner core is provided with a hot air flow channel that runs vertically. The upper end of the hot air flow channel is a hot air inlet extending outside the outer shell, and the lower end of the hot air flow channel is a hot air outlet extending outside the outer shell. The outer periphery of the inner core is provided with spiral swirl fins, and the pitch of the swirl fins gradually decreases from bottom to top. This fully utilizes the intake energy, effectively separates droplets, recovers waste heat, and improves integration.

Description

Technical Field

[0001] The present invention relates to the field of fuel cells, and in particular to a water vapor separation and heat exchange assembly and a fuel cell air supply system. Background Art

[0002] Global warming has become a significant obstacle to sustainable economic and social development, necessitating the increased attention and control of greenhouse gas emissions. Carbon dioxide is a major greenhouse gas, a significant portion of which originates from vehicle emissions. Fuel cells are chemical devices that convert the chemical energy of fuel directly into electrical energy. Unconstrained by the Carnot cycle, they are more efficient than traditional internal combustion engines. Hydrogen fuel cells use hydrogen and oxygen as feedstock, with their sole emission being water. From the perspective of energy conservation and ecological protection, hydrogen fuel cells hold great promise as a promising alternative to traditional internal combustion engines and a new source of vehicle power.

[0003] During hydrogen fuel cell operation, oxygen from the vehicle's surrounding air is pressurized and fed into the fuel cell stack through the air supply system. It acts as an oxidant in the electrochemical reaction and is then released into the atmosphere. Existing air supply systems are equipped with a water vapor separator to separate water from the exhaust, allowing it to be reused, and a heat exchanger to cool the pressurized intake air to a set temperature before it enters the fuel cell stack. These two components increase the system's size and lead to poor water vapor separation and low heat exchange efficiency. Furthermore, air contains only 21% oxygen, and the remaining high-pressure gas is directly discharged into the atmosphere, resulting in energy loss. Furthermore, fuel cells operate at a low temperature, with exhaust gases at only 90°C. This low temperature only removes a small amount of waste heat, leaving the remaining heat to be removed by the coolant driven by the electronic water pump, resulting in low fuel cell efficiency. Under high-current density operating conditions, energy loss is significant, while under low-current density operating conditions, intake air humidity requirements are difficult to meet. Summary of the Invention

[0004] The purpose of the present invention is to provide a water vapor separation heat exchange assembly and a fuel cell air supply system to solve one or more technical problems existing in the prior art and at least provide a beneficial option or create conditions.

[0005] The technical solutions adopted to solve the above technical problems are:

[0006] First, the present invention provides a water vapor separation and heat exchange assembly, which includes: an outer shell and an inner core, a vertical cylindrical guide cavity is provided inside the outer shell, an air inlet port connected to the guide cavity is provided at the lower part of the outer shell, and an air outlet port connected to the guide cavity is provided at the upper part of the outer shell, the air inlet port and the air outlet port are arranged in the tangential direction of the guide cavity, and a drainage hole is provided at the bottom of the guide cavity; the inner core is tubular, the inner core is coaxially arranged in the guide cavity and forms a cold air flow channel with the inner peripheral wall of the guide cavity, the inner core is provided with a hot air flow channel running through from top to bottom, the upper end of the hot air flow channel is a hot air inlet extending out of the outer shell, and the lower end of the hot air flow channel is a hot air outlet extending out of the outer shell, and the outer periphery of the inner core is provided with spirally rising swirl fins, and the pitch of the swirl fins gradually shortens from bottom to top.

[0007] The beneficial effects of this water vapor separation and heat exchange assembly are as follows: when in use, hot air enters the hot air flow channel from the hot air inlet, flows from top to bottom and is discharged from the hot air outlet, while cold air enters the guide cavity tangentially from the air inlet port, and under the guidance of the swirl fins, spirally flows from bottom to top along the cold air flow channel, and then is discharged from the air outlet port. The hot air in the hot air flow channel exchanges heat with the cold air in the cold air flow channel to heat the cold air. When the cold air enters from the air inlet port, a tangential vortex is formed, and the air outlet port collects the air flow to reduce the flow resistance. The swirl fins form a spiral rising structure, the pitch gradually shortens, and the air intake flow rate gradually increases. When in use, when the flow rate on the lower side is lower, large droplets are mainly separated, and when the flow rate on the upper side is higher, small droplets are mainly separated, so that the air intake energy is fully utilized, droplets are effectively separated and waste heat is recovered, thereby improving the integration.

[0008] As a further improvement of the above technical solution, the swirl fins gradually extend outward from bottom to top.

[0009] This can gradually close the flow channel, gradually reduce gas bypass, gradually increase the inlet gas velocity, and reasonably organize the airflow to separate the droplets.

[0010] As a further improvement of the above technical solution, a connecting line between the outer edges of the swirl fins and the vertical inner peripheral wall of the guide cavity forms an angle α greater than 3°.

[0011] As a further improvement of the above technical solution, the swirl fins and the inner core are both heat-conducting components. As heat-exchanging fins, the swirl fins have a large area and sufficient heat exchange, resulting in a significant effect.

[0012] As a further improvement of the above technical solution, the bottom surface of the diversion cavity is tilted up and down, and the drainage hole is located at the lowest point of the bottom surface of the diversion cavity, so as to facilitate the convergence of the droplets and enable the droplets to be automatically discharged from the drainage hole.

[0013] As a further improvement of the above technical solution, the bottom of the outer shell is provided with an open installation port, the top of the outer shell is provided with a through-hole, the inner core fixing sleeve is provided with a flange, the flange is sealed and connected to the installation port, and the upper end of the inner core is sealed through the through-hole.

[0014] When installing the water vapor separation and heat exchange assembly, the outer shell is put on the inner core from top to bottom, wherein the flange is connected to the installation port at the bottom of the outer shell, so that a guide cavity is formed inside the outer shell, the upper end of the inner core is put on the perforation, and a sealing ring is provided between the perforation and the inner core. At this time, the top surface of the flange serves as the bottom surface of the guide cavity, and the drainage hole is provided on the flange.

[0015] In addition, the present invention also provides a fuel cell air supply system, which includes the above-mentioned water vapor separation and heat exchange assembly, and also includes a compressor with a turbine, an intercooling and humidification module, and a fuel cell stack. The compressor is connected to the hot air inlet, and the intercooling and humidification module includes an intercooling module and a humidification module. The compressor, hot air flow channel, intercooling module, dry air side of the humidification module, fuel cell stack, wet air side of the humidification module, cold air flow channel, and turbine are connected in sequence.

[0016] When in use, the high-pressure and high-temperature air pressurized by the compressor enters the hot air flow channel to heat the exhaust in the cold air flow channel. The air enters the intercooler module for cooling, and then passes through the humidification module to use the exhaust wet air to humidify the intake dry air. The humidified air enters the fuel cell stack, and the wet air coming out of the fuel cell stack enters the wet air side of the humidification module to humidify the dry air on the dry air side of the humidification module. After that, it enters the cold air flow channel to heat and separate the droplets, and finally enters the turbine. The high-pressure exhaust drives the compressor through the turbine to achieve air compression. That is to say, the high-pressure exhaust energy is recovered through the turbine to improve the system efficiency; the water vapor separation and heat exchange assembly is used to provide the turbine with suitable exhaust dry air to prevent droplets from entering the turbine and causing damage to the blades. At the same time, the low-temperature exhaust and high-temperature intake air are used for heat exchange. On the one hand, the high-temperature intake air temperature is reduced, the cooling water pump power and the scale of the intercooler humidification module are reduced, and the system efficiency is improved. At the same time, the low-temperature exhaust temperature is increased, the internal energy is increased, and it is further recovered through the turbine. At the same time, the low-temperature exhaust temperature is increased, which reduces the precipitation of water vapor in the turbine and further increases the life of the turbine.

[0017] As a further improvement of the above technical solution, an intake bypass pipe with an intake bypass valve is connected between the outlet of the intercooler module and the inlet of the fuel cell stack.

[0018] The air intake in this scheme also has another flow path. Under high-voltage operating conditions, a part of the intake air passes through the intake bypass valve and enters the fuel cell stack. This part of the intake air is not humidified by the humidification module, and the humidity of the intake air is adjusted by adjusting the opening of the intake bypass valve.

[0019] As a further improvement of the above technical solution, an exhaust bypass pipe with an exhaust bypass valve is connected between the outlet of the fuel cell stack and the cold air flow channel.

[0020] In this solution, part of the exhaust gas can pass through the exhaust bypass valve and enter the cold air flow channel. Under high electrical density conditions, the water content of the exhaust gas is greatly increased. In this way, part of the exhaust gas can be used to humidify the intake air, meeting the intake air humidity requirements while reducing the airway resistance and energy loss.

[0021] As a further improvement of the above technical solution, it also includes an exhaust manifold with a muffler, the exhaust bypass pipe and the wet air side outlet of the humidification module are connected to the exhaust manifold through an exhaust back pressure valve, and the turbine outlet is connected to the exhaust manifold through a turbine back pressure valve.

[0022] In this way, part of the exhaust gas coming out of the humidification module will flow directly through the exhaust back-pressure valve to the exhaust manifold, and part of the exhaust gas coming out of the fuel cell stack will flow through the exhaust bypass valve and the exhaust back-pressure valve to the exhaust manifold. In this way, the exhaust gas will not pass through the turbine, and the opening of the exhaust back-pressure valve and the turbine back-pressure valve can be controlled to manage the exhaust back pressure, appropriately block the reaction air in the fuel cell stack, and at the same time increase the intake pressure of the turbine to improve the system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0024] Figure 1 This is a cross-sectional view of an embodiment of the water vapor separation and heat exchange assembly provided by the present invention;

[0025] Figure 2 This is a structural diagram of an embodiment of the inner core provided by the present invention;

[0026] Figure 3 This is a schematic diagram of an embodiment of the fuel cell air supply system provided by the present invention. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0029] In the description of the present invention, if there are words such as "several", it means one or more, and "more" means more than two. Greater than, less than, and exceed are understood as not including the number itself, and above, below, and within are understood as including the number itself.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference Figures 1 to 3 The fuel cell air supply system of the present invention is implemented as follows:

[0032] The fuel cell air supply system of this embodiment includes a water vapor separation and heat exchange assembly 2000 , a compressor 400 of a turbine 300 , an intercooler and humidification module, and a fuel cell stack 500 .

[0033] The function of the water vapor separation and heat exchange assembly 2000 is to separate and exchange water vapor from the exhaust gas, thereby increasing the life of the turbine 300, reducing the power of the cooling water pump and the size of the intercooler, and improving the system efficiency.

[0034] The water vapor separation and heat exchange assembly 2000 of this embodiment includes an outer shell 100 and an inner core 200, wherein the outer shell 100 is cylindrical as a whole, and a guide cavity 110 is provided inside the outer shell 100, and the guide cavity 110 is cylindrical, and the axial direction of the guide cavity 110 is vertically arranged, and an air inlet port 120 is provided at the lower part of the guide cavity 110, and the air inlet port 120 is located at the lower part of the outer shell 100, and the air inlet direction of the air inlet port 120 extends along the tangential direction of the outer periphery of the guide cavity 110, and an air outlet port 130 is provided at the upper part of the guide cavity 110, and the air outlet port 130 is located at the upper part of the outer shell 100, and the air outlet of the air outlet port 130 extends in the reverse direction along the tangential direction of the outer periphery of the guide cavity 110.

[0035] The inner core 200 is vertically arranged in the guide cavity 110, and the upper and lower ends of the inner core 200 extend from the guide cavity 110 to the outside of the outer shell 100. The inner core 200 has a tubular structure, and the inner core 200 and the guide cavity 110 are coaxially arranged, so that the inner core 200 and the inner circumferential wall of the guide cavity 110 constitute a cold air flow channel 210, and the two ends of the cold air flow channel 210 are respectively the air outlet port 130 and the air inlet port 120. A hot air flow channel 220 is arranged inside the inner core 200, and the upper port of the hot air flow channel 220 is a hot air inlet 221, and the lower port of the hot air flow channel 220 is a hot air outlet 222.

[0036] In addition, a swirl fin 230 is provided on the outer periphery of the portion of the inner core 200 located in the guide cavity 110 . The swirl fin 230 rises in a spiral along the axis of the inner core 200 , wherein the pitch of the swirl fin 230 gradually decreases from bottom to top.

[0037] During use, hot air enters the hot air flow channel 220 from the hot air inlet 221, flows from top to bottom and is discharged from the hot air outlet 222, while cold air enters the guide cavity 110 tangentially from the air inlet port 120, and spirally flows from bottom to top along the cold air flow channel 210 under the guidance of the swirl fins 230, and is then discharged from the air outlet port 130. The hot air in the hot air flow channel 220 exchanges heat with the cold air in the cold air flow channel 210 to heat the cold air. When the cold air enters from the air inlet port 120, a tangential vortex is formed, and the air outlet port 130 collects the air flow to reduce flow resistance. The swirl fins 230 form a spiral ascending structure with a gradually shortened pitch, gradually increasing the air intake flow rate. When the flow rate on the lower side is lower during use, large droplets are mainly separated, and when the flow rate on the upper side is higher, small droplets are mainly separated, thereby making full use of the air intake energy, effectively separating droplets and recovering waste heat, and improving integration.

[0038] In some embodiments, the swirl fins 230 are wrapped with a filler metal woven screen, which increases the heat exchange surface and increases the water vapor capture surface.

[0039] In this embodiment, a drainage hole 140 is provided at the bottom of the guide cavity 110, and the drainage rate is controlled by designing the aperture, wherein the bottom of the guide cavity 110 is inclined up and down, and the drainage hole 140 is provided at the lowest point of the bottom of the guide cavity 110, so as to facilitate the convergence of droplets, so that the droplets are automatically discharged from the drainage hole 140.

[0040] Furthermore, the lateral length of the swirl fin 230 gradually extends outward from bottom to top, which can gradually close the flow channel, gradually reduce gas bypass, gradually increase the inlet gas flow rate, and reasonably organize the airflow to separate the droplets.

[0041] In addition, the connecting line between the outer edges of the swirl fins 230 and the inner wall of the guide cavity 110 forms an angle α, which is greater than 3°.

[0042] In order to improve the heat exchange effect, the swirl fins 230 and the inner core 200 are made of heat-conducting materials. At this time, the swirl fins 230 serve as heat exchange fins, and the large area of ​​the fins fully exchanges heat and has obvious effects.

[0043] With regard to the assembly of the water vapor separation and heat exchange assembly 2000, this embodiment further refines the structure of the water vapor separation and heat exchange assembly 2000, wherein the bottom of the outer shell 100 is provided with an installation opening 150 that is open downward, and the top of the outer shell 100 is provided with a through-hole 160 that passes through from top to bottom. A flange 240 is fixed to the outer peripheral wall of the lower part of the inner core 200, and the flange 240 is sealed and connected to the installation opening 150 by screws, and the upper end of the inner core 200 passes through the through-hole 160, and the through-hole 160 is sealed against the outer peripheral wall of the inner core 200.

[0044] When installing the water vapor separation and heat exchange assembly, the outer shell 100 is placed on the inner core 200 from top to bottom, wherein the flange 240 is connected to the installation port 150 at the bottom of the outer shell 100, so that a guide cavity 110 is formed inside the outer shell 100, and the upper end of the inner core 200 is placed on the through-hole 160, and a sealing ring is provided between the through-hole 160 and the inner core 200. At this time, the top surface of the flange 240 serves as the bottom surface of the guide cavity 110, and the drainage hole 140 is provided on the flange 240.

[0045] As for the pipeline connection of the fuel cell air supply system, specifically: the intercooling and humidification module of this embodiment includes an air inlet chamber, an intercooling module 600, an intermediate chamber, a humidification module 700 and an air outlet chamber connected in sequence. The intercooling module 600 cools down the high-pressure and high-temperature intake air after the compressor 400, and the humidification module 700 humidifies the intake dry air by utilizing the exhaust wet air. The humidification module 700 has a wet air side and a dry air side.

[0046] The inlet of the compressor 400 is connected to an air filter 410 for filtering the intake air, the outlet of the compressor 400 is connected to the hot air inlet 221 of the hot air flow channel 220 through a pipe, the hot air outlet 222 of the hot air flow channel 220 is connected to the air inlet cavity of the intercooling humidification module through a pipe, the dry air side of the humidification module 700 is connected to the air inlet pipe, the air outlet cavity of the intercooling humidification module is connected to the inlet of the fuel cell stack 500, and the outlet of the fuel cell stack 500 is connected to the wet air side inlet of the humidification module 700, the wet air side outlet of the humidification module 700 is connected to the air inlet port 120 of the cold air flow channel 210, and the air outlet port 130 of the cold air flow channel 210 is connected to the inlet of the turbine 300.

[0047] During use, the high-pressure and high-temperature air pressurized by the compressor 400 enters the hot air flow channel 220 to heat the exhaust gas in the cold air flow channel 210. The air then enters the intercooler module 600 for cooling, and then passes through the humidification module 700 to humidify the intake dry air with the exhaust wet air. The humidified air enters the fuel cell stack 500, and the wet air coming out of the fuel cell stack 500 enters the wet air side of the humidification module 700 to humidify the dry air on the dry air side of the humidification module 700. After that, it enters the cold air flow channel 210 to heat and separate the droplets, and finally enters the turbine 300. The high-pressure exhaust gas drives the compressor 400 to operate through the turbine 300. To achieve air compression, that is, to recover high-pressure exhaust energy through the turbine 300 and improve system efficiency; use the water vapor separation and heat exchange assembly 2000 to provide the turbine 300 with suitable exhaust dry air to prevent droplets from entering the turbine 300 and causing damage to the blades. At the same time, use low-temperature exhaust and high-temperature intake air for heat exchange. On the one hand, the high-temperature intake air temperature is reduced, the cooling water pump power and the scale of the intercooling and humidification module are reduced, and the system efficiency is improved. At the same time, the low-temperature exhaust temperature is increased, the internal energy is increased, and it is further recovered through the turbine 300. At the same time, the low-temperature exhaust temperature is increased, which reduces the precipitation of water vapor in the turbine 300 and further increases the life of the turbine 300.

[0048] Furthermore, an intake bypass pipe is connected between the intermediate chamber and the outlet chamber. An intake bypass valve 800 is installed in the intake bypass pipe, which is connected in parallel with the dry air side of the humidification module 700. An exhaust bypass pipe is connected between the outlet of the fuel cell stack 500 and the cold air flow channel 210. An exhaust bypass valve 900 is installed in the exhaust bypass pipe, which is connected in parallel with the wet air side of the humidification module 700. The exhaust bypass valve 900 and the intake bypass valve 800 jointly manage the humidity of the intake air. Alternatively, only the intake bypass valve 800 can be used. Alternatively, only the exhaust bypass valve 900 can be used.

[0049] This embodiment also includes an exhaust manifold, wherein the exhaust bypass pipe is connected to the exhaust manifold in parallel with the outlet of the wet air side of the humidification module 700, and the outlet of the turbine 300 is also connected to the exhaust manifold. A turbine back-pressure valve 310 is installed at the outlet of the turbine 300, and an exhaust back-pressure valve 710 is also installed in parallel with the outlet of the wet air side of the humidification module 700.

[0050] A muffler 1000 is mounted on the exhaust manifold for reducing noise.

[0051] In addition, an intake shut-off valve 510 and an exhaust shut-off valve 520 are respectively installed at the inlet and outlet of the fuel cell stack 500 , which are closed when the fuel cell is shut down to protect the fuel cell stack 500 .

[0052] In this way, the air intake has two flow paths. The first air intake flow path is: atmosphere-air filter 410-compressor 400-hot air flow path 220 of water vapor separation and heat exchange assembly 2000-intercooling module 600-dry air side of humidification module 700-intake stop valve 510-fuel cell stack 500; the second air intake flow path is atmosphere-air filter 410-compressor 400-hot air flow path 220 of water vapor separation and heat exchange assembly 2000-intercooling module 600-intake bypass valve 800-intake stop valve 510-fuel cell stack 500.

[0053] The air exhaust also has four flow channels. The first flow channel of the air exhaust is: the fuel cell stack 500 - the exhaust shut-off valve 520 - the wet air side of the humidification module 700 - the cold air flow channel 210 of the water vapor separation and heat exchange assembly 2000 - the turbine 300 turbine back pressure valve 310 - the muffler 1000 - the atmosphere.

[0054] The second air exhaust flow path is: fuel cell stack 500 - exhaust shut-off valve 520 - exhaust bypass valve 900 - cold air flow path 210 of water vapor separation and heat exchange assembly 2000 - turbine 300 turbine back pressure valve 310 - muffler 1000 - atmosphere;

[0055] The third air exhaust flow path is: stack 500 - exhaust shut-off valve 520 - wet air side of humidification module 700 - exhaust back pressure valve 710 - muffler 1000 - atmosphere

[0056] The fourth air exhaust flow path is: fuel cell stack 500 - exhaust shut-off valve 520 - exhaust bypass valve 900 - exhaust back pressure valve 710 - muffler 1000 - atmosphere.

[0057] Part of the exhaust gas can enter the cold air flow channel 210 through the exhaust bypass valve 900. Under high electrical density working conditions, the water content of the exhaust gas is greatly increased. In this way, part of the exhaust gas can be used to humidify the intake air, meeting the intake air humidity requirements while reducing airway resistance and reducing energy loss.

[0058] And after a part of the exhaust gas comes out of the humidification module 700, it flows directly to the exhaust manifold through the exhaust back-pressure valve 710. Another part of the exhaust gas can come out of the fuel cell stack 500 and flow to the exhaust manifold through the exhaust bypass valve 900 and the exhaust back-pressure valve 710. In this way, the exhaust gas does not pass through the turbine 300. The opening of the exhaust back-pressure valve 710 and the turbine back-pressure valve 310 can also be controlled to manage the exhaust back pressure, appropriately block the reaction air in the fuel cell stack 500, and at the same time increase the intake pressure of the turbine 300 to improve the system efficiency.

[0059] Under high-current density operating conditions, a portion of the intake air passes through the intake bypass valve 800 and enters the fuel cell stack 500. This portion of the intake air is not humidified by the humidification module 700, and the humidity of the intake air is adjusted by adjusting the opening of the intake bypass valve 800.

[0060] The above specifically describes the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A fuel cell air supply system, characterized in that: It includes a water vapor separation heat exchange assembly (2000), and the water vapor separation heat exchange assembly (2000) includes: A housing (100) is provided with a vertical cylindrical flow guide cavity (110) therein; an air inlet port (120) communicating with the flow guide cavity (110) is provided at the lower portion of the housing (100); an air outlet port (130) communicating with the flow guide cavity (110) is provided at the upper portion of the housing (100); the air inlet port (120) and the air outlet port (130) are arranged in a tangential direction of the flow guide cavity (110); and a drainage hole (140) is provided at the bottom of the flow guide cavity (110); The inner core (200) is tubular and is coaxially arranged in the guide cavity (110) and forms a cold air flow channel (210) with the inner peripheral wall of the guide cavity (110). The inner core (200) is provided with a hot air flow channel (220) that passes through the inner core (200). The upper end of the hot air flow channel (220) is a hot air inlet (221) extending outside the outer shell (100), and the lower end of the hot air flow channel (220) is a hot air outlet (222) extending outside the outer shell (100). The outer periphery of the inner core (200) is provided with spirally ascending swirl fins (230), and the pitch of the swirl fins (230) gradually shortens from bottom to top. The system further comprises: a compressor (400) with a turbine (300), an intercooling and humidifying module, and a fuel cell stack (500), wherein the compressor (400) is connected to the hot air inlet (221), the intercooling and humidifying module comprises an intercooling module (600), a humidifying module (700), and the compressor (400), the hot air flow channel (220), the intercooling module (600), the dry air side of the humidifying module (700), the fuel cell stack (500), the wet air side of the humidifying module (700), the cold air flow channel (210), and the turbine (300) are sequentially connected; The swirl fins (230) gradually extend outward from bottom to top; An intake bypass pipe with an intake bypass valve (800) is connected between the intercooling module (600) and the inlet of the fuel cell stack (500); An exhaust bypass pipe with an exhaust bypass valve (900) is connected between the outlet of the fuel cell stack (500) and the cold air flow channel (210); It also includes an exhaust manifold with a muffler (1000), the exhaust bypass pipe and the wet air side outlet of the humidification module (700) are connected to the exhaust manifold via an exhaust back pressure valve (710), and the turbine (300) outlet is connected to the exhaust manifold via a turbine back pressure valve (310).

2. The fuel cell air supply system according to claim 1, wherein: The connecting line between the outer edges of the swirl fins (230) and the vertical inner peripheral wall of the guide cavity (110) forms an angle α, which is greater than 3°.

3. The fuel cell air supply system according to claim 1, wherein: The swirl fins (230) and the inner core (200) are both heat-conducting components.

4. The fuel cell air supply system according to claim 1, wherein: The bottom surface of the diversion cavity (110) is arranged to be inclined up and down, and the drainage hole (140) is located at the lowest point of the bottom surface of the diversion cavity (110).

5. The fuel cell air supply system according to claim 1, wherein: The bottom of the outer shell (100) is provided with an open mounting opening (150), the top of the outer shell (100) is provided with a through hole (160), the inner core (200) fixing sleeve is provided with a flange (240), the flange (240) is sealedly connected to the mounting opening (150), and the upper end of the inner core (200) is sealed through the through hole (160).

Images