Humidifying system and fuel cell engine with same

Abstract

The utility model provides a humidifying system and a fuel cell engine with the same. The humidifying system comprises an air compressor; the main pipeline is communicated with an air outlet of the air compressor; two ends of the first branch pipeline are respectively communicated with the main pipeline and an electric pile inlet of the electric pile structure; the heat exchange device comprises a box body and a heat exchange structure, and the box body is provided with an air inlet, a liquid inlet and an outlet; gas exhausted from the gas outlet enters the heat exchange structure through the gas inlet so as to exchange heat with liquid entering the box body through the liquid inlet through the heat exchange structure; two ends of the second branch pipeline are respectively communicated with the main pipeline and the air inlet; a liquid outlet of the gas-liquid separation device is communicated with the liquid inlet; the intercooler is arranged on the first branch pipeline; the outlet communicates with the first branch pipeline, and the communicating position of the outlet and the first branch pipeline is located between the air outlet and the intercooler. The humidifying device for the proton exchange membrane fuel cell engine solves the problem that in the prior art, the size of the humidifying device for the proton exchange membrane fuel cell engine is large.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell engines, in particular to a humidification system and a fuel cell engine having the same. Background Art

[0002] Currently, during the operation of a high-power proton exchange membrane fuel cell engine, it is usually necessary to humidify the air supplied to the fuel cell to increase the relative humidity of the air entering the fuel cell, thereby preventing the proton exchange membrane from losing water.

[0003] However, in the prior art, the humidification device used in the proton exchange membrane fuel cell engine is large in size, occupies a large space, and cannot meet the requirements of miniaturization design. Utility Model Content

[0004] The main purpose of the utility model is to provide a humidification system and a fuel cell engine having the same, so as to solve the problem of large volume of the humidification device used for the proton exchange membrane fuel cell engine in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a humidification system is provided, comprising: an air compressor having an air outlet; a main pipeline, a first end of the main pipeline being connected to the air outlet; a first branch pipeline, two ends of the first branch pipeline being connected to the second end of the main pipeline and the stack inlet of the stack structure respectively; a heat exchange device, comprising a box body and a heat exchange structure arranged in the box body, the box body having an air inlet, a liquid inlet and an outlet, the liquid inlet and the outlet being connected to the inner cavity of the box body, and the outlet being located above the air inlet and the liquid inlet; and air discharged from the air outlet. The gas enters the heat exchange structure through the air inlet to exchange heat with the liquid entering the box through the liquid inlet through the heat exchange structure; a second branch pipeline, the two ends of the second branch pipeline are respectively connected to the second end of the main pipeline and the air inlet; a gas-liquid separation device, the discharge port of the gas-liquid separation device is connected to the liquid inlet, and the first inlet of the gas-liquid separation device is connected to the stack outlet of the fuel cell structure; an intercooler is arranged on the first branch pipeline; wherein the outlet is connected to the first branch pipeline, and the connection position of the outlet and the first branch pipeline is located between the air outlet and the intercooler.

[0006] Furthermore, the box body has a through hole, and the humidification system also includes: a first pipeline, which is arranged in the through hole, one end of the first pipeline is connected to the exhaust part of the gas-liquid separation device, and the other end of the first pipeline is connected to the vortex end of the air compressor.

[0007] Furthermore, the intercooler has a first outlet and a second outlet, the first outlet is connected to the fuel cell stack inlet, and the humidification system also includes: a second pipeline, the two ends of the second pipeline are respectively connected to the second outlet of the intercooler and the second inlet of the gas-liquid separation device; a first control valve, the first control valve is arranged on the second pipeline to control the flow rate or flow velocity of the gas in the second pipeline and / or the on-off state of the second pipeline.

[0008] Furthermore, the humidification system also includes: a second control valve, which is arranged on the first branch pipeline to control the flow rate or flow velocity of the gas in the first branch pipeline and / or the on-off state of the first branch pipeline; and / or, a third control valve, which is arranged on the second branch pipeline to control the flow rate or flow velocity of the gas in the second branch pipeline and / or the on-off state of the second branch pipeline.

[0009] Furthermore, the heat exchange structure includes: an air inlet pipe section, the first end of the air inlet pipe section is an air inlet; a heat exchange body, the second end of the air inlet pipe section is connected to the heat exchange body; an exhaust pipe section, the first end of the exhaust pipe section is an exhaust port, the second end of the exhaust pipe section is connected to the heat exchange body, and the exhaust port is located above the air inlet; wherein, the liquid entering the box body vaporizes to form water vapor after heat exchange with the heat exchange body, and the gas discharged from the exhaust port mixes with the water vapor and enters the outlet; the through hole is located above the exhaust pipe section.

[0010] Furthermore, the heat exchange body includes: a plurality of straight pipe sections arranged at intervals; at least one arc-shaped pipe section, and two adjacent straight pipe sections are connected through at least one arc-shaped pipe section; wherein the second end of the intake pipe section is connected to a straight pipe section through at least one arc-shaped pipe section, and the second end of the exhaust pipe section is connected to a straight pipe section through at least one arc-shaped pipe section.

[0011] Furthermore, the humidification system also includes: a waterproof breathable valve, which is arranged at the exhaust port.

[0012] Furthermore, the intercooler includes: an air inlet cover; an outlet cover having a first outlet and a second outlet; a plurality of gas channels arranged at intervals, with the two ends of each gas channel being connected to the air inlet cover and the outlet cover respectively; an inclined water baffle arranged in the outlet cover, with the plate surface of the inclined water baffle being arranged at an angle to the extension direction of the gas channel; wherein there are multiple inclined water baffles, and the inclination angles of at least two inclined water baffles are different.

[0013] Furthermore, a water storage chamber connected to the second outlet is provided in the outlet housing, and the water storage chamber is located at the bottom of the outlet housing for buffering condensed water dripping from the inclined water baffle; the intercooler also includes: a water level sensor for detecting the water level in the water storage chamber; a one-way valve, the one-way valve is provided at the second outlet for controlling the on-off state of the second outlet; a control module, which is electrically connected to the water level sensor and the one-way valve; when the detection value of the water level sensor is greater than or equal to the preset water level value, the control module controls the one-way valve to open, and the condensed water enters the gas-liquid separation device through the second outlet.

[0014] According to another aspect of the present invention, a fuel cell engine is provided, comprising the above-mentioned humidification system.

[0015] Applying the technical solution of the present invention, the humidification system includes an air compressor, a main pipeline, a first branch pipeline, a heat exchange device, a second branch pipeline, a gas-liquid separation device, and an intercooler. The air compressor has an air outlet, the first end of the main pipeline is connected to the air outlet, and the two ends of the first branch pipeline are respectively connected to the second end of the main pipeline and the stack inlet of the stack structure. The heat exchange device includes a housing and a heat exchange structure disposed within the housing. The housing has an air inlet, a liquid inlet, and an outlet. The liquid inlet and the outlet are both connected to the inner cavity of the housing, and the outlet is located above the air inlet and the liquid inlet. The gas discharged from the air outlet enters the heat exchange structure through the air inlet to exchange heat with the liquid entering the housing through the liquid inlet through the heat exchange structure. The two ends of the second branch pipeline are respectively connected to the second end of the main pipeline and the air inlet. The liquid discharge port of the gas-liquid separation device is connected to the liquid inlet, and the first inlet of the gas-liquid separation device is connected to the stack outlet of the stack structure. The intercooler is disposed on the first branch pipeline. Among them, the outlet is connected to the first branch pipe, and the connection position of the outlet and the first branch pipe is located between the air outlet and the intercooler. In this way, since the high-temperature gas discharged from the air outlet of the air compressor contains a large amount of heat, the heat of the high-temperature gas is used in this application to heat the liquid separated by the gas-liquid separation device through a heat exchange device, thereby humidifying the stack structure. In this process, the liquid in the gas-liquid separation device is rationally utilized to replace the humidification device in the prior art to realize the self-humidification function of the fuel cell engine, which not only saves system costs, but also reduces the volume of the system, greatly realizing the lightweight design of the fuel cell engine, thereby solving the problem of the large volume of the humidification device used for the proton exchange membrane fuel cell engine in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1A schematic structural diagram of an embodiment of a humidification system according to the present utility model is shown;

[0018] Figure 2 Shown Figure 1 A schematic structural diagram of a heat exchange device of a humidification system;

[0019] Figure 3 Shown Figure 1 Schematic diagram of the internal structure of the intercooler of the humidification system;

[0020] Figure 4 A control flow chart of a fuel cell engine according to the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Air compressor; 11. Turbine end; 20. Main pipeline; 30. First branch pipeline; 40. Fuel cell structure; 41. Fuel cell inlet; 42. Fuel cell outlet; 50. Heat exchange device; 51. Box; 511. Air inlet; 512. Liquid inlet; 513. Outlet; 514. Through hole; 52. Heat exchange structure; 521. Air inlet pipe section; 522. Heat exchange body; 5221. Straight pipe section; 5222. Curved pipe section; 523. Exhaust pipe section; 60. Second branch pipeline; 70. Gas-liquid separator Isolation device; 80, intercooler; 81, first outlet; 82, second outlet; 83, air inlet cover; 84, air outlet cover; 85, gas channel; 86, inclined water baffle; 87, water storage chamber; 88, water level sensor; 89, one-way valve; 90, first pipeline; 100, second pipeline; 110, first control valve; 120, second control valve; 130, third control valve; 140, waterproof and breathable valve; 150, filter; 160, temperature sensor; 170, humidity sensor. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0025] In the present invention, unless otherwise specified, directional words such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0026] In order to solve the problem of large volume of the humidification device used for the proton exchange membrane fuel cell engine in the prior art, the present application provides a humidification system and a fuel cell engine having the same.

[0027] like Figures 1 to 3 As shown, the humidification system includes an air compressor 10, a main pipeline 20, a first branch pipeline 30, a heat exchange device 50, a second branch pipeline 60, a gas-liquid separation device 70, and an intercooler 80. The air compressor 10 has an air outlet, and the first end of the main pipeline 20 is connected to the air outlet. The two ends of the first branch pipeline 30 are respectively connected to the second end of the main pipeline 20 and the stack inlet 41 of the stack structure 40. The heat exchange device 50 includes a housing 51 and a heat exchange structure 52 disposed within the housing 51. The housing 51 has an air inlet 511, a liquid inlet 512, and an outlet 513. The liquid inlet 512 and the outlet 513 are both connected to the inner cavity of the housing 51, and the outlet 513 is located above the air inlet 511 and the liquid inlet 512. The gas discharged from the air outlet enters the heat exchange structure 52 through the air inlet 511 to exchange heat with the liquid entering the housing 51 through the liquid inlet 512 through the heat exchange structure 52. The two ends of the second branch line 60 are connected to the second end of the main line 20 and the air inlet 511, respectively. The liquid discharge port of the gas-liquid separator 70 is connected to the liquid inlet 512, and the first inlet of the gas-liquid separator 70 is connected to the stack outlet 42 of the fuel cell stack structure 40. The intercooler 80 is disposed on the first branch line 30. The outlet 513 is connected to the first branch line 30, and the connection point between the outlet 513 and the first branch line 30 is located between the air outlet and the intercooler 80.

[0028] Applying the technical solution of this embodiment, since the high-temperature gas discharged from the outlet of the air compressor 10 contains a large amount of heat, this embodiment utilizes the heat of the high-temperature gas to heat the liquid separated by the gas-liquid separation device 70 through the heat exchange device 50, thereby humidifying the fuel cell stack structure 40. In this process, the liquid in the gas-liquid separation device 70 is rationally utilized to replace the humidification device in the prior art to achieve the self-humidification function of the fuel cell engine, which not only saves system costs but also reduces the volume of the system, greatly achieving a lightweight design of the fuel cell engine, thereby solving the problem of the large volume of the humidification device used in the prior art for proton exchange membrane fuel cell engines.

[0029] In this embodiment, the operating principle of the humidification system is as follows:

[0030] The heat exchanger 50 uses the gas-liquid separator 70 as a water source. After the fuel cell is operating, water is drawn from the gas-liquid separator 70 through a connecting tube. Since the temperature of the gas discharged from the air compressor 10 is typically greater than 150°C, when a portion of the gas is passed into the heat exchanger 50, the high-temperature gas heats the liquid in the housing 51, forming water vapor. Due to the saturated vapor pressure, the humidity in the housing 51 is 100%.

[0031] like Figure 2 As shown, the housing 51 has a through hole 514, and the humidification system further includes a first pipeline 90. The first pipeline 90 is disposed within the through hole 514. One end of the first pipeline 90 communicates with the exhaust port of the gas-liquid separator 70, and the other end of the first pipeline 90 communicates with the turbine end 11 of the air compressor 10. Thus, the first pipeline 90 passes through the housing 51, utilizing the temperature of the exhaust gas to cool the interior of the housing 51 to a certain extent, thereby reducing the load on the intercooler 80.

[0032] The gas in the first pipeline 90 is heated by the heat exchange structure 52 in the box body 51 so as to enter the turbine end 11 for reuse.

[0033] like Figure 3 As shown, the intercooler 80 has a first outlet 81 and a second outlet 82. The first outlet 81 is connected to the fuel cell stack inlet 41. The humidification system also includes a second pipeline 100 and a first control valve 110. The two ends of the second pipeline 100 are connected to the second outlet 82 of the intercooler 80 and the second inlet of the gas-liquid separation device 70, respectively. The first control valve 110 is disposed on the second pipeline 100 to control the flow rate or flow velocity of the gas within the second pipeline 100 and / or the on / off state of the second pipeline 100. In this way, during the operation of the intercooler 80, the condensed water generated can enter the gas-liquid separation device 70 through the second outlet 82 for recycling and reuse, improving resource utilization and avoiding resource waste. Furthermore, the configuration of the first control valve 110 makes it easier for users to control the second pipeline 100, reduces control difficulty, and also enables automated control.

[0034] Optionally, the first control valve 110 is an on-off valve.

[0035] like Figure 1As shown, the humidification system further includes a second control valve 120, which is disposed on the first branch pipe 30 and is used to control the flow rate or flow velocity of the gas in the first branch pipe 30 and / or the on-off state of the first branch pipe 30; and / or the humidification system further includes a third control valve 130, which is disposed on the second branch pipe 60 and is used to control the flow rate or flow velocity of the gas in the second branch pipe 60 and / or the on-off state of the second branch pipe 60. In this way, the above-mentioned configuration of the second control valve 120 and / or the third control valve 130 makes it easier for the user to control the first branch pipe 30 and / or the second branch pipe 60, reduces the control difficulty, and also realizes automatic control.

[0036] In this embodiment, the humidification system further includes a second control valve 120 and a third control valve 130. The second control valve 120 is disposed on the first branch pipe 30 to control the flow rate or flow velocity of the gas in the first branch pipe 30 and / or the on / off state of the first branch pipe 30. The third control valve 130 is disposed on the second branch pipe 60 to control the flow rate or flow velocity of the gas in the second branch pipe 60 and / or the on / off state of the second branch pipe 60. Simultaneously, by controlling the flow rates of the gas in the two branches through the second control valve 120 and the third control valve 130, respectively, the purpose of freely controlling the humidity can be achieved.

[0037] In this embodiment, air first passes through a filter 150 to remove impurities, and then is compressed by the air compressor 10. A portion of the pressurized gas flows through the main pipeline 20 and the first branch pipeline 30 to the intercooler 80. After cooling in the intercooler 80, the gas enters the fuel cell structure 40 through the first outlet 81 and the fuel cell inlet 41 to participate in the chemical reaction. The second outlet 82 of the intercooler 80 is connected to the gas-liquid separator 70 and is equipped with a first control valve 110. The other portion of the pressurized gas flows through the main pipeline 20 and the second branch pipeline 60 to the heat exchanger 50. The second branch pipeline 60 is equipped with a third control valve 130. The fuel cell outlet 42 is connected to the first inlet of the gas-liquid separator 70. The exhaust of the gas-liquid separator 70 is connected to the turbine end 11 of the air compressor 10 through the through hole 514 of the heat exchanger 50. The discharge port of the gas-liquid separator 70 is connected to the heat exchanger 50. The outlet of the heat exchanger 50 is connected to the first branch pipeline 30.

[0038] Optionally, the second control valve 120 is an on-off valve.

[0039] Optionally, the third control valve 130 is an on-off valve.

[0040] like Figure 2As shown, the heat exchange structure 52 includes an air inlet pipe section 521, a heat exchange body 522, and an exhaust pipe section 523. The first end of the air inlet pipe section 521 is the air inlet 511, and the second end of the air inlet pipe section 521 is connected to the heat exchange body 522. The first end of the exhaust pipe section 523 is the exhaust port, and the second end of the exhaust pipe section 523 is connected to the heat exchange body 522. The exhaust port is located above the air inlet 511. The liquid entering the housing 51 vaporizes to form water vapor after heat exchange with the heat exchange body 522, and the gas discharged from the exhaust port mixes with the water vapor and enters the outlet 513; the through hole 514 is located above the exhaust pipe section 523. In this way, the above arrangement ensures that the high-temperature gas entering the heat exchange structure 52 can heat the liquid entering through the liquid inlet 512, so that the liquid vaporizes to form water vapor and is discharged from the outlet 513 to enter the first branch pipeline 30.

[0041] like Figure 2 As shown, the heat exchange body 522 includes a plurality of straight pipe sections 5221 and at least one curved pipe section 5222 arranged at intervals. Two adjacent straight pipe sections 5221 are connected via at least one curved pipe section 5222. The second end of the intake pipe section 521 is connected to a straight pipe section 5221 via at least one curved pipe section 5222, and the second end of the exhaust pipe section 523 is connected to a straight pipe section 5221 via at least one curved pipe section 5222. Thus, the above arrangement makes the heat exchange body 522 a serpentine bend, thereby increasing the contact area between the heat exchange body 522 and the liquid and improving the heat exchange efficiency. At the same time, the above arrangement makes the structure of the heat exchange body 522 simpler, easier to process and implement, and reduces the processing cost and difficulty of the heat exchange body 522.

[0042] In this embodiment, multiple straight pipe sections 5221 are arranged parallel to each other, and two adjacent straight pipe sections 5221 are connected by an arc-shaped pipe section 5222. The second end of the intake pipe section 521 is connected to a straight pipe section 5221 through an arc-shaped pipe section 5222, and the second end of the exhaust pipe section 523 is connected to a straight pipe section 5221 through an arc-shaped pipe section 5222.

[0043] like Figure 2 As shown, the humidification system further includes a waterproof breathable valve 140. The waterproof breathable valve 140 is disposed at the exhaust port. This arrangement of the waterproof breathable valve 140 ensures that gas can be discharged through the exhaust port while preventing liquid from entering the exhaust port, thereby preventing liquid backflow.

[0044] Specifically, after entering the housing 51, the high-temperature gas passes through a serpentine bend to ensure sufficient heat exchange area for heating the liquid. The outlet of the serpentine bend is an exhaust port equipped with a waterproof breathable valve 140 to prevent liquid backflow. The gas discharged from the exhaust port enters the upper left corner of the housing 51, where it mixes with the newly formed water vapor to form humid air with a relative humidity of 100%. It is then discharged from the outlet 513 at the upper right corner of the housing 51 into the first branch pipe 30. A first pipe 90 is threaded through the through hole 514, serving as the exhaust gas removal line.

[0045] like Figure 3 As shown, the intercooler 80 includes an air inlet cover 83, an outlet cover 84, a plurality of gas channels 85 arranged at intervals, and an inclined water baffle 86. The outlet cover 84 has a first outlet 81 and a second outlet 82, and the two ends of each gas channel 85 are connected to the air inlet cover 83 and the outlet cover 84 respectively. The inclined water baffle 86 is arranged in the outlet cover 84, and the plate surface of the inclined water baffle 86 is arranged at an angle to the extension direction of the gas channel 85. There are multiple inclined water baffles 86, and the inclination angles of at least two inclined water baffles 86 are different. In this way, the above-mentioned setting of the intercooler 80 can recover and cache the condensed water attached to the gas entering its interior, so as to reuse the above-mentioned condensed water and avoid waste of resources.

[0046] In this embodiment, there are seven inclined water baffles 86 , each of which has a different inclination angle. The seven inclined water baffles 86 are arranged at intervals along the height direction of the intercooler 80 .

[0047] It should be noted that the number of the inclined water baffles 86 is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, the number of the inclined water baffles 86 is two, three, four, five, six, eight, or more.

[0048] like Figure 3As shown, the outlet housing 84 is provided with a water storage chamber 87 connected to the second outlet 82. The water storage chamber 87 is located at the bottom of the outlet housing 84 and is used to buffer condensed water dripping from the inclined water baffle 86. The intercooler 80 also includes a water level sensor 88, a one-way valve 89, and a control module. The water level sensor 88 is used to detect the water level in the water storage chamber 87. The one-way valve 89 is located at the second outlet 82 to control the on / off state of the second outlet 82. The control module is electrically connected to both the water level sensor 88 and the one-way valve 89. When the detection value of the water level sensor 88 is greater than or equal to a preset water level, the control module controls the one-way valve 89 to open, allowing condensed water to enter the gas-liquid separation device 70 through the second outlet 82. This arrangement enables automatic water discharge from the intercooler 80, thereby improving the intelligence of the humidification system and reducing the workload of personnel. Furthermore, this arrangement prevents gas containing condensed water from entering the fuel cell stack structure 40.

[0049] Specifically, since the inlet temperature is required to be low-temperature gas below 100°C, condensed water will be formed after the high-temperature humidified gas passes through the intercooler 80, and the water droplets formed by the condensed water enter the outlet housing 84 through the gas channel 85. Seven inclined water baffles 86 are provided in the outlet housing 84, and the inclination angle of the inclined water baffle 86 is based on the test value. When the gas with liquid droplets contacts the inclined water baffle 86, it will be intercepted by the inclined water baffle 86 and fall into the water storage chamber 87 under the action of gravity, thereby preventing the liquid from entering the stack structure 40. Among them, a one-way valve 89 and a water level sensor 88 are provided in the water storage chamber 87. When the pressure of the water storage chamber 87 reaches a certain level, the one-way valve 89 will open, and the condensed water will be re-entered into the gas-liquid separation device 70 for humidification.

[0050] like Figure 1 As shown, the humidification system further includes a temperature sensor 160 and a humidity sensor 170 , and both the temperature sensor 160 and the humidity sensor 170 are disposed on the first branch pipe 30 .

[0051] The present application also provides a fuel cell engine (not shown) comprising the above-mentioned humidification system.

[0052] In this embodiment, the working principle of the fuel cell engine is as follows:

[0053] like Figure 4As shown, after the fuel cell engine is started up, the engine current is set to x (A). After the current setting is completed, proceed to the next step, otherwise reset the current. Then set the speed of the air compressor 10 to R, which is mapped to the air metering ratio of the stack structure 40 (derived from the test value). At this time, determine whether the outlet temperature of the air compressor 10 is less than 100°C. If it is less than 100°C, the second control valve 120 is fully closed and the third control valve 130 is fully opened, so that the outlet gas of the air compressor 10 is heated by the heat exchange device 50; when the temperature is greater than 100°C, the temperature sensor 160 and the humidity sensor 170 jointly control the second control valve 120 and the third control valve 130 to meet the humidity requirements of the stack structure 40. Among them, Figure 4 a and b are the openings of the second control valve 120 and the third control valve 130 respectively, and are mapped to the humidity sensor 170 (derived from test values).

[0054] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0055] Since the high-temperature gas discharged from the air compressor outlet contains a large amount of heat, the present application utilizes the heat of the high-temperature gas to heat the liquid separated by the gas-liquid separation device through a heat exchange device, thereby humidifying the fuel cell stack structure. In this process, the liquid in the gas-liquid separation device is rationally utilized to replace the humidification device in the prior art to achieve the self-humidification function of the fuel cell engine, which not only saves system costs but also reduces the volume of the system, greatly achieving a lightweight design of the fuel cell engine, thereby solving the problem of the large volume of the humidification device used in the prior art for proton exchange membrane fuel cell engines.

[0056] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0058] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A humidification system, characterized in that: include: An air compressor (10) having an air outlet; a main pipeline (20), wherein a first end of the main pipeline (20) is in communication with the gas outlet; a first branch pipeline (30), wherein both ends of the first branch pipeline (30) are respectively connected to the second end of the main pipeline (20) and the stack inlet (41) of the stack structure (40); A heat exchange device (50) comprises a housing (51) and a heat exchange structure (52) arranged in the housing (51); the housing (51) has an air inlet (511), a liquid inlet (512), and an outlet (513); the liquid inlet (512) and the outlet (513) are both in communication with the inner cavity of the housing (51); the outlet (513) is located above the air inlet (511) and the liquid inlet (512); gas discharged from the air outlet enters the heat exchange structure (52) via the air inlet (511), and heat is exchanged with liquid entering the housing (51) via the liquid inlet (512) through the heat exchange structure (52); a second branch pipeline (60), wherein both ends of the second branch pipeline (60) are respectively connected to the second end of the main pipeline (20) and the air inlet (511); a gas-liquid separation device (70), wherein the liquid discharge port of the gas-liquid separation device (70) is in communication with the liquid inlet (512), and the first inlet of the gas-liquid separation device (70) is in communication with the stack outlet (42) of the stack structure (40); an intercooler (80), disposed on the first branch pipe (30); The outlet (513) is connected to the first branch pipe (30), and the connection position between the outlet (513) and the first branch pipe (30) is located between the air outlet and the intercooler (80).

2. The humidification system according to claim 1, characterized in that The box (51) has a through hole (514), and the humidification system further includes: A first pipeline (90) is passed through the through hole (514), one end of the first pipeline (90) is connected to the exhaust portion of the gas-liquid separation device (70), and the other end of the first pipeline (90) is connected to the turbine end (11) of the air compressor (10).

3. The humidification system according to claim 1, characterized in that The intercooler (80) has a first outlet (81) and a second outlet (82), wherein the first outlet (81) is in communication with the stack inlet (41), and the humidification system further comprises: a second pipeline (100), wherein both ends of the second pipeline (100) are respectively connected to the second outlet (82) of the intercooler (80) and the second inlet of the gas-liquid separation device (70); A first control valve (110) is provided on the second pipeline (100) for controlling the flow rate or flow velocity of the gas in the second pipeline (100) and / or the on / off state of the second pipeline (100).

4. The humidification system according to claim 1, characterized in that The humidification system further comprises: a second control valve (120), the second control valve (120) being arranged on the first branch pipeline (30) for controlling the flow rate or flow velocity of the gas in the first branch pipeline (30) and / or the on / off state of the first branch pipeline (30); and / or, A third control valve (130) is provided on the second branch pipeline (60) to control the flow rate or flow velocity of the gas in the second branch pipeline (60) and / or the on / off state of the second branch pipeline (60).

5. The humidification system according to claim 2, characterized in that: The heat exchange structure (52) comprises: an air intake pipe section (521), wherein a first end of the air intake pipe section (521) is the air intake port (511); a heat exchange body (522), wherein the second end of the air inlet pipe section (521) is in communication with the heat exchange body (522); an exhaust pipe section (523), wherein a first end of the exhaust pipe section (523) is an exhaust port, a second end of the exhaust pipe section (523) is in communication with the heat exchange body (522), and the exhaust port is located above the air inlet (511); The liquid entering the box (51) exchanges heat with the heat exchange body (522) and then vaporizes to form water vapor, and the gas discharged from the exhaust port mixes with the water vapor and then enters the outlet (513); the through hole (514) is located above the exhaust pipe section (523).

6. The humidification system according to claim 5, characterized in that The heat exchange body (522) includes: A plurality of straight pipe sections (5221) arranged at intervals; at least one arc-shaped pipe segment (5222), wherein two adjacent straight pipe segments (5221) are connected via the at least one arc-shaped pipe segment (5222); The second end of the air intake pipe section (521) is connected to one of the straight pipe sections (5221) through at least one of the arc-shaped pipe sections (5222), and the second end of the exhaust pipe section (523) is connected to one of the straight pipe sections (5221) through at least one of the arc-shaped pipe sections (5222).

7. The humidification system according to claim 5, characterized in that: The humidification system further comprises: A waterproof breathable valve (140) is arranged at the exhaust port.

8. The humidification system according to claim 3, characterized in that: The intercooler (80) comprises: Air intake cover (83); an outlet housing (84) having the first outlet (81) and the second outlet (82); a plurality of gas channels (85) arranged at intervals, wherein both ends of each gas channel (85) are respectively connected to the gas inlet housing (83) and the gas outlet housing (84); An inclined water baffle (86) is arranged in the outlet housing (84), and a plate surface of the inclined water baffle (86) is arranged at an angle to an extension direction of the gas channel (85); There are multiple inclined water baffles (86), and at least two of the inclined water baffles (86) have different inclination angles.

9. The humidification system according to claim 8, characterized in that A water storage chamber (87) in communication with the second outlet (82) is provided in the outlet housing (84). The water storage chamber (87) is located at the bottom of the outlet housing (84) and is used to buffer condensed water dripping from the inclined water baffle (86). The intercooler (80) further includes: a water level sensor (88) for detecting the water level in the water storage chamber (87); a one-way valve (89), the one-way valve (89) being arranged at the second outlet (82) for controlling the on-off state of the second outlet (82); A control module is electrically connected to the water level sensor (88) and the one-way valve (89); when the detection value of the water level sensor (88) is greater than or equal to a preset water level value, the control module controls the one-way valve (89) to open, and the condensed water enters the gas-liquid separation device (70) through the second outlet (82).

10. A fuel cell engine, characterized in that: A humidification system comprising the humidification system according to any one of claims 1 to 9.

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