Humidifier for fuel cell system
By designing humidifier membrane tubes and opening and closing components of different diameters in the fuel cell system, the problem of humidifier volume and flow control in the high-power fuel cell system is solved, and efficient air humidity and system compactness are achieved.
Patent Information
- Application Number
- CN202420662628.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-01
AI Technical Summary
In the design of high-power fuel cell system, existing humidifiers are either large in size and large in flow, or require a bypass valve design to ensure sufficient cathode air supply and air humidity increase, resulting in complex structure and difficult flow resistance control.
Design a humidifier including an outer shell, a thin membrane tube and a thick membrane tube to control air flow through diaphragm tubes of different diameters (reset springs and valve plates) to ensure 100% of the system initially operated at low power % total humidity increase efficiency.
It realizes efficient humidification during low-power operation, simplifies structural design, and improves the compactness and humidity efficiency of the system.
Smart Images
Figure CN222300682U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fuel cells, and specifically refers to a humidifier for a fuel cell system. Background Art
[0002] A fuel cell is a chemical power generation device that directly converts the chemical energy of a fuel into electrical energy, also known as an electrochemical generator. A fuel cell is an isothermal electrochemical device that directly converts chemical energy into electrical energy without going through a thermal engine process and is not restricted by the Carnot cycle, so it has high energy conversion efficiency and is pollution-free. The humidity control of the cathode air intake of a fuel cell mainly uses a humidifier, which can adjust the humidity of the fuel cell stack air, thereby helping to extend the service life of the fuel cell stack.
[0003] However, the following problems exist in the use of fuel cells at present: when designing a high-power fuel cell system, to humidify the cathode air circuit, either a large-volume, large-flow humidifier is used, or a humidifier plus a bypass valve design is used to ensure sufficient cathode air supply, humidification of the cathode air and control of flow resistance. Utility Model Content
[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a humidifier for a fuel cell system.
[0005] The technical solution adopted by the utility model is as follows: The utility model provides a humidifier for a fuel cell system, including an outer shell, in which a thin membrane tube and a thick membrane tube are installed, the outer shell is provided with a first cavity, a second cavity and a third cavity, the first cavity, the second cavity and the third cavity are sequentially adjacently distributed in the outer shell, the second cavity is provided with a plurality of layers of thick membrane tubes, between the thick membrane tubes are a plurality of layers of thin membrane tubes, and an opening and closing component is installed at one end of the thick membrane tube.
[0006] Furthermore, the opening and closing assembly includes a return spring installed at one end of the thick membrane tube, and the return spring is connected to a first valve plate. The diameter of the thick membrane tube is larger than the diameter of the thin membrane tube.
[0007] Furthermore, a first wet inlet is provided through one side of the second cavity, and a second wet outlet is provided through one side of the second cavity.
[0008] Furthermore, a first dry inlet is provided on one side of the first cavity, a third dry inlet is provided on one side of the third cavity, the first cavity is communicated with the second cavity, the second cavity is communicated with the third cavity, the first wet inlet, the second wet outlet, the first dry inlet and the third dry inlet are cylindrical in design, and the overall structure is simple and compact.
[0009] The beneficial effects achieved by the utility model using the above structure are as follows: the scheme provides a humidifier for a fuel cell system, which controls the flow of the thick-diameter membrane tube by designing humidification membrane tubes of different diameters, adding a valve plate at the outlet of the thick-diameter membrane tube, and adding a spring for back pressure control. When the system is initially running at low power, the air entering the stack needs to be 100% fully humidified. At this time, due to the stack flow, the valve plate is in a closed state, and all air flow flows through the thin membrane tube, so that the humidification efficiency reaches 100%. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 A main structural diagram of a humidifier for a fuel cell system provided by the utility model;
[0011] Figure 2 A schematic diagram of the installation of the thin membrane tube and the thick membrane tube provided by the utility model;
[0012] Figure 3 A schematic diagram of the internal structure of a humidifier for a fuel cell system provided by the utility model;
[0013] Figure 4 A schematic diagram of the main structure of the thick membrane tube provided by the utility model;
[0014] Figure 5 for Figure 4 A partial enlarged view of part A;
[0015] Figure 6 This is a schematic diagram of the main structure of the thin membrane tube provided by the utility model.
[0016] Among them, 1. outer shell, 101. first cavity, 102. second cavity, 103. third cavity, 104. first wet inlet, 105. second wet outlet, 106. first dry inlet, 107. third dry inlet, 2. thin membrane tube, 3. thick membrane tube, 301. return spring, 302. first valve plate.
[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0019] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention. Specific embodiments
[0021] like Figure 1-Figure 3 As shown, the utility model provides a humidifier for a fuel cell system, comprising an outer shell 1, in which a thin membrane tube 2 and a thick membrane tube 3 are installed, and a first cavity 101, a second cavity 102 and a third cavity 103 are provided in the outer shell 1, and the first cavity 101, the second cavity 102 and the third cavity 103 are sequentially and adjacently distributed in the outer shell 1, and a multi-layer thick membrane tube 3 is installed in the second cavity 102, and a multi-layer thin membrane tube 2 is installed between the thick membrane tubes 3, and an opening and closing component is installed at one end of the thick membrane tube 3.
[0022] like Figure 2 , Figure 4 and Figure 6 As shown, the utility model provides a humidifier for a fuel cell system, the opening and closing assembly includes a return spring 301 installed at one end of the thick membrane tube 3, the return spring 301 is connected to a first valve plate 302, and the diameter of the thick membrane tube 3 is larger than the diameter of the thin membrane tube 2.
[0023] like Figure 1 and Figure 3 As shown, the utility model provides a humidifier for a fuel cell system, wherein a first wet inlet 104 is provided through one side of the second cavity 102 , and a second wet outlet 105 is provided through one side of the second cavity 102 .
[0024] like Figure 1 and Figure 3 As shown, the utility model provides a humidifier for a fuel cell system, wherein a first dry inlet 106 is provided on one side of the first cavity 101, and a third dry inlet 107 is provided on one side of the third cavity 103, the first cavity 101 is communicated with the second cavity 102, and the second cavity 102 is communicated with the third cavity 103, and the first wet inlet 104, the second wet outlet 105, the first dry inlet 106 and the third dry inlet 107 are cylindrical in design.
[0025] Working principle: By designing pipes with different diameters, the humidification efficiency can be effectively increased compared to the previous pipes with only a single diameter.
[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
[0028] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. A humidifier for a fuel cell system, comprising an outer shell, characterized in that: The outer shell is provided with a thin membrane tube and a thick membrane tube, the outer shell is provided with a first cavity, a second cavity and a third cavity, the first cavity, the second cavity and the third cavity are adjacently distributed in the outer shell in sequence, the second cavity is provided with a plurality of layers of thick membrane tubes, a plurality of layers of thin membrane tubes are provided between the thick membrane tubes, and an opening and closing component is provided at one end of the thick membrane tube.
2. A humidifier for a fuel cell system according to claim 1, characterized in that: The opening and closing assembly includes a return spring installed at one end of the thick membrane tube, and a first valve plate is connected to the return spring. The diameter of the thick membrane tube is larger than the diameter of the thin membrane tube.
3. A humidifier for a fuel cell system according to claim 2, characterized in that: A first wet inlet is provided through one side of the second cavity, and a second wet outlet is provided through one side of the second cavity.
4. A humidifier for a fuel cell system according to claim 3, characterized in that: A first dry inlet is provided through one side of the first cavity.
5. A humidifier for a fuel cell system according to claim 4, characterized in that: A third dry inlet is provided through one side of the third cavity.
6. A humidifier for a fuel cell system according to claim 1, characterized in that: The first cavity is communicated with the second cavity, and the second cavity is communicated with the third cavity.
7. A humidifier for a fuel cell system according to claim 5, characterized in that: The first wet inlet, the second wet outlet, the first dry inlet and the third dry inlet are cylindrical in design.