Humidifier and fuel cell engine

Abstract

The utility model relates to the technical field of fuel cells, in particular to a humidifier and a fuel cell engine, which comprise a body, a dry channel and a wet channel. A cavity is formed in the body; the dry channel comprises a first inlet and a first outlet which are formed in the body and a filter assembly and a membrane tube which are arranged in the cavity, the first inlet is communicated with an outlet of an intercooler, the first outlet is communicated with an inlet of an electric pile, and the first inlet is communicated with the first outlet through the filter assembly and the membrane tube in sequence; the wet channel comprises a second inlet and a second outlet which are formed in the body, the second inlet is communicated with the second outlet through the cavity outside the membrane tube, and the second inlet is communicated with an outlet of the electric pusher; wherein the membrane tube is used for exchanging water vapor in air inside and outside the membrane tube. The humidifier and the fuel cell engine disclosed by the utility model have a filtering function, so that an air flow channel of a galvanic pile is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a humidifier and a fuel cell engine. Background Art

[0002] During the reaction process of the fuel cell stack, the proton exchange membrane needs to maintain a certain humidity to ensure that the proton exchange membrane is in a suitable water saturation state, so as to maintain a high conductivity and ensure a high reaction efficiency. Therefore, the reaction medium is required to carry a certain amount of water vapor into the stack, which is usually achieved through a humidifier. At present, the humidifier humidifies the air discharged from the intercooler so that the air has a suitable humidity and temperature, and is finally input into the stack for reaction. However, the particulate matter in the intercooler enters the stack through the humidifier, which will cause the air flow channel of the stack to be blocked, causing irreversible damage to the stack. Utility Model Content

[0003] The utility model aims to provide a humidifier and a fuel cell engine, which have a filtering function to avoid clogging of the air flow channel of the fuel cell stack.

[0004] In order to achieve the above-mentioned object, the utility model provides a humidifier in the first aspect, comprising:

[0005] A body having a cavity inside;

[0006] a dry channel, comprising a first inlet and a first outlet provided on the body, and a filter assembly and a membrane tube provided in the cavity, wherein the first inlet is communicated with the outlet of the intercooler, the first outlet is communicated with the inlet of the fuel cell stack, and the first inlet is communicated with the first outlet in sequence through the filter assembly and the membrane tube; and

[0007] A wet channel, comprising a second inlet and a second outlet provided on the body, wherein the second inlet is communicated with the second outlet through the cavity outside the membrane tube, and the second inlet is communicated with the outlet of the electric pusher;

[0008] Wherein, the membrane tube is used to exchange water vapor in the air inside and outside the membrane tube.

[0009] In some embodiments, the body is provided with an opening, which is communicated with the cavity and is used for installing the filter assembly.

[0010] In some embodiments, the filter assembly includes a cover plate, a filter screen disposed below the cover plate, and a sealing ring, the filter screen is disposed in the cavity, the cover plate is sealed on the opening through the sealing ring, and the cover plate is detachably connected to the body.

[0011] In some embodiments, the filter screen and the cover plate are perpendicular to each other, and the outer edge of the filter screen abuts against the inner wall of the body.

[0012] In some embodiments, the humidifier includes a bypass port, the bypass port being in communication with the membrane tube.

[0013] In some embodiments, the humidifier includes two tube sheets, which are correspondingly installed at two ends of the membrane tube, and the outer periphery of the tube sheet is sealed and connected to the inner wall of the body.

[0014] In some embodiments, the second inlet and the second outlet are located on the body between two of the tube sheets.

[0015] In some embodiments, the membrane tube is a hollow fiber membrane tube.

[0016] In some embodiments, the body includes a shell with openings at both ends and end covers installed at both ends of the shell.

[0017] In a second aspect, the utility model provides a fuel cell engine, comprising the above-mentioned humidifier

[0018] The utility model provides a humidifier and a fuel cell engine, which have the following beneficial effects compared with the prior art:

[0019] The dry channel is used to transport dry air from the inside of the membrane tube mold, and the wet channel is used to transport wet air from the outside of the membrane tube. The water vapor exchange function of the membrane tube is used to realize the humidification function of the dry air. The dry air enters the membrane tube only after passing through the filter assembly, thus having a filtering function, so that the dry air is humidified and then input into the fuel cell stack to avoid blockage of the air flow channel of the fuel cell stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a humidifier provided in an embodiment of the utility model.

[0021] Figure 2 This is a schematic diagram of the longitudinal cross-sectional structure of a humidifier provided in an embodiment of the utility model.

[0022] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0023] Figure 4 for Figure 2 Schematic diagram of the local enlarged structure at point B in the middle.

[0024] In the figure: 1, ring body; 2, upper end surface; 3, lower end surface; 4, outer side surface; 41, vertical section; 42, first inclined section; 43, second inclined section; 5, inner side surface; 6, first convex portion; 7, second convex portion. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0026] It should be understood that, in the description of the present application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, that is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0027] like Figure 1-4 As shown, the humidifier of the first embodiment of the utility model includes a body 1, a dry channel and a wet channel. The body 1 has a cavity 11 inside; the dry channel includes a first inlet 2 and a first outlet 3 arranged on the body 1, and a filter assembly 4 and a membrane tube 5 arranged in the cavity 11, the first inlet 2 is connected to the outlet of the intercooler, the first outlet 3 is connected to the inlet of the battery stack, and the first inlet 2 is connected to the first outlet 3 through the filter assembly 4 and the membrane tube 5 in sequence; the wet channel includes a second inlet 6 and a second outlet 7 arranged on the body 1, the second inlet 6 is connected to the second outlet 7 through the cavity 11 outside the membrane tube 5, and the second inlet 6 is connected to the outlet of the electric propulsion; wherein the membrane tube 5 is used to exchange water vapor in the air inside and outside the membrane tube 5.

[0028] During operation, the dry air output from the outlet of the intercooler enters from the first inlet 2, and enters the membrane tube 5 after being filtered by the filter assembly 4. At the same time, the humid air discharged from the outlet of the fuel cell stack (the electrochemical reaction occurs inside the fuel cell stack to produce water when the fuel cell stack is running, so the humidity is relatively high) enters the outside of the membrane tube 5 from the second inlet 6. Due to the water permeability of the membrane tube 5, the humidity inside and outside the membrane tube 5 reaches a balance. Finally, the dry air in the membrane tube 5 is humidified and then discharged from the first outlet 3 and enters the fuel cell stack for use; and the humidity of the humid air outside the membrane tube 5 is reduced and then discharged into the atmosphere through the second outlet 7.

[0029] Based on the above settings, the humidifier not only humidifies the air input to the fuel cell stack, but also has a filtering function to avoid blockage of the air flow channel of the fuel cell stack.

[0030] In one embodiment, the body 1 is provided with an opening 12, which is in communication with the cavity 11 and is used to install the filter assembly 4. The opening 12 makes it easy to install and remove the filter assembly 4 from the body 1, so that the filter assembly can be replaced or cleaned in time.

[0031] like Figure 1 and 3 As shown, specifically, the filter assembly 4 includes a cover plate 41, a filter screen 42 and a sealing ring 43 disposed below the cover plate 41, the filter screen 42 is disposed in the cavity 11, the cover plate 41 is sealed on the opening 12 through the sealing ring 43, and the cover plate 41 is detachably connected to the body 1. The filter screen 42 is fixed to the bottom of the cover plate 41, and the cover plate 41 is fixed to the body 1 through screws, which facilitates the removal of the cover plate 41, and the sealing ring 43 is used between the cover plate 41 and the body 1 to ensure a sealing effect to prevent foreign particles in the air from entering the body 1.

[0032] Furthermore, the filter screen 42 and the cover plate 41 are perpendicular to each other. To ensure the filtering effect of the filter screen 42 , the outer edge of the filter screen 42 abuts against the inner wall of the body 1 , so that air can enter the membrane tube 5 only after being filtered by the filter screen 42 .

[0033] In one embodiment, the humidifier includes a bypass interface 8, which is connected to the membrane tube 5. When the fuel cell engine is idling, the dry air output from the outlet of the intercooler exceeds the input requirement of the fuel cell stack, and a bypass valve is installed through the bypass interface 8 to discharge the excess air.

[0034] In one embodiment, Figure 2 As shown, the humidifier includes two tube sheets 9, which are correspondingly mounted at both ends of the membrane tube 5, and the outer periphery of the tube sheet 9 is sealed and connected to the inner wall of the body 1. The function of the tube sheet 9 is to enable the membrane tube 5 to communicate smoothly with the first inlet 2 and the first outlet 3, and to prevent the humid air discharged from the second inlet 6 from directly entering the membrane tube 5, so that the humid air is outside the membrane tube 5, and the water vapor in the humid air penetrates into the membrane tube 5.

[0035] In one embodiment, the second inlet 6 and the second outlet 7 are located on the body 1 between two tube sheets 9. During operation, the humid air discharged from the outlet of the stack is input from the second inlet 6 to the outside of the membrane tube 5, and can exchange water vapor with the dry air inside the membrane tube 5 to achieve humidity balance.

[0036] Specifically, the membrane tube 5 is a hollow fiber membrane tube. The hollow fiber membrane tube is a fiber filament processed into a hollow inner cavity with polysulfone and dimethylacetamide as raw materials, and then divided by a high permeability polymer, and has a selective permeation characteristic. Since water vapor, hydrogen, ammonia and carbon dioxide permeate faster, while methane, nitrogen, argon, oxygen and carbon monoxide permeate slower, the fast permeating and slow permeating are separated, which is conducive to achieving the humidity balance of the air inside and outside the membrane tube 5.

[0037] In one embodiment, the body 1 includes a shell 13 with openings at both ends and end covers 14 installed at both ends of the shell. The end covers 14 are detachable from both ends of the shell 13 to facilitate maintenance and cleaning of the membrane tube 5 in the shell 13.

[0038] The fuel cell engine of the second embodiment of the utility model comprises the above-mentioned humidifier, which humidifies the air discharged from the intercooler so that the air has a suitable humidity and temperature, and is finally input into the fuel cell stack for reaction.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A humidifier, characterized in that: include: A body having a cavity inside; A dry channel, comprising a first inlet and a first outlet provided on the body, and a filter assembly and a membrane tube provided in the cavity, wherein the first inlet is communicated with the outlet of the intercooler, the first outlet is communicated with the inlet of the fuel cell stack, and the first inlet is communicated with the first outlet in sequence through the filter assembly and the membrane tube; as well as A wet channel, comprising a second inlet and a second outlet provided on the body, wherein the second inlet is communicated with the second outlet through the cavity outside the membrane tube, and the second inlet is communicated with the outlet of the stack; Wherein, the membrane tube is used to exchange water vapor in the air inside and outside the membrane tube.

2. The humidifier according to claim 1, characterized in that The body is provided with an opening, which is communicated with the cavity and is used for installing the filter assembly.

3. The humidifier according to claim 2, characterized in that The filter assembly includes a cover plate, a filter screen arranged below the cover plate and a sealing ring. The filter screen is arranged in the cavity. The cover plate is sealed on the opening through the sealing ring. The cover plate is detachably connected to the body.

4. The humidifier according to claim 3, characterized in that: The filter screen and the cover plate are perpendicular to each other, and the outer edge of the filter screen abuts against the inner wall of the body.

5. The humidifier according to claim 1, characterized in that: The humidifier comprises a bypass interface, and the bypass interface is communicated with the membrane tube.

6. The humidifier according to claim 1, characterized in that The humidifier comprises two tube sheets, which are correspondingly mounted at two ends of the membrane tube, and the outer periphery of the tube sheet is sealedly connected to the inner wall of the body.

7. The humidifier according to claim 6, characterized in that The second inlet and the second outlet are located on the body between the two tube sheets.

8. The humidifier according to claim 1, characterized in that The membrane tube is a hollow fiber membrane tube.

9. The humidifier according to claim 1, characterized in that: The body comprises a shell with openings at both ends and end covers installed at both ends of the shell.

10. A fuel cell engine, characterized in that: Comprising a humidifier as described in any one of claims 1-9.

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