Gas dew point control and switching device

Abstract

The utility model discloses a gas dew point control and switching device, relates to the field of fuel cells, and solves the problem of how to improve the high and low dew point adjustment efficiency of a fuel cell test system. Comprising a gas filtering unit, a flow control unit, a switching unit and a humidifying unit which are sequentially connected, wherein the switching unit outputs gas into two paths; according to the utility model, the dew point temperature of the gas can be adjusted by rapidly controlling the flow ratio of the gas through the flow controller, the switching speed of the gas at high and low dew points is accelerated, and the response speed is high.

Description

Technical Field

[0001] The utility model belongs to the field of fuel cells and relates to a gas dew point control and switching device. Background Art

[0002] Fuel cells are the fourth generation of power generation technology after nuclear power. They can directly convert chemical energy into electricity, unaffected by the Carnot cycle, and are characterized by high efficiency and cleanliness. Due to the unique characteristics of the proton exchange membrane fuel cell (PEMFC), fuel cell humidification is required to increase power generation. Fuel cell test systems are designed to evaluate and test fuel cell performance and are used in fuel cell development and testing.

[0003] During fuel cell development and testing, simulation of various operating environments and parameters is essential. High dynamic response is key to accurate testing and evaluation. While the test system provides a suitable operating environment for the fuel cell, its ability to switch dew points under different operating conditions is crucial for evaluating the fuel cell's response speed and performance under varying operating conditions. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to improve the efficiency of high and low dew point regulation of a fuel cell test system.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A gas dew point control and switching device, comprising a gas filter unit, a flow control unit, and a switching unit; the gas filter unit, the flow control unit, and the switching unit are connected in sequence, wherein the switching unit divides the gas into two branches;

[0007] The flow control unit comprises a first flow controller (3), a second flow controller (4), a third flow controller (5), and a fourth flow controller (6); one end of the first flow controller (3), one end of the second flow controller (4), one end of the third flow controller (5), and one end of the fourth flow controller (6) are connected to the gas filter unit, and the other end of the first flow controller (3), the other end of the second flow controller (4), the other end of the third flow controller (5), and the other end of the fourth flow controller (6) are connected to the switching unit.

[0008] The utility model can quickly control the flow ratio of dry gas and gas entering the humidification box through the flow controller to adjust the dew point temperature of the gas entering the battery stack, accelerate the switching speed of the gas at high and low dew points, have a fast response speed, reduce the energy consumption of the system, and have low equipment cost; at the same time, the flow range of dry and wet gases is increased through the common flow controller for dry and wet gases, and the number of flow meters used is reduced.

[0009] Preferably, the gas filtration unit comprises a filter (1) and a first pressure sensor (2); the filter (1) is connected to one end of the first pressure sensor (2), and the other end of the first pressure sensor (2) is connected to the flow control unit.

[0010] Beneficial Effects: Filter the input gas and monitor the pressure of hydrogen or air before entering the flow controller.

[0011] Preferably, the switching unit comprises a first three-way valve (7) and a second three-way valve (8); the input end of the first three-way valve (7) is connected to the other end of the second flow controller (4), the input end of the second three-way valve (8) is connected to the other end of the third flow controller (5), one of the output ends of the first three-way valve (7), one of the output ends of the second three-way valve (8) and the other end of the first flow controller (3) are connected together to output an air path, and another output end of the first three-way valve (7), another output end of the second three-way valve (8) and the other end of the fourth flow controller (6) are connected together to output another air path.

[0012] Beneficial effects: The three-way valve is used to realize the flow distribution of dry gas and wet gas in the fuel cell test system, thereby improving the utilization rate of system components and reducing the occupied space. The utilization efficiency of the equipment is greatly improved, and the cost of the system is further reduced.

[0013] Preferably, the first flow controller (3) is a dry gas flow controller.

[0014] Preferably, the second flow controller (4), the third flow controller (5), and the fourth flow controller (6) are wet gas flow controllers.

[0015] Preferably, the three-way valve is a pneumatic valve or an electric valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of a gas dew point control and switching device according to the first embodiment of the present invention;

[0017] Figure 2 This is a connection structure diagram of a gas dew point control and switching device according to the first embodiment of the present invention. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0019] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0020] Example 1

[0021] like Figure 1 As shown, it is a flow chart of a gas dew point control and switching device according to the first embodiment of the present invention; it includes a gas filtration unit, a flow control unit, and a switching unit connected in sequence; wherein the switching unit divides the gas into two paths, one is a dry gas branch, and the other is a wet gas branch.

[0022] like Figure 2 As shown, this is a connection structure diagram of a gas dew point control and switching device according to a first embodiment of the present invention; the gas filtration unit includes a filter 1 and a first pressure sensor 2; the flow control unit includes a first flow controller 3, a second flow controller 4, a third flow controller 5, and a fourth flow controller 6; the switching unit includes a first three-way valve 7 and a second three-way valve 8.

[0023] The hydrogen / air enters the system through one end of the filter 1, the other end of the filter 1 is connected to one end of the first pressure sensor 2, the other end of the first pressure sensor 2 is connected to one end of the first flow controller 3, one end of the second flow controller 4, one end of the third flow controller 5, and one end of the fourth flow controller 6, the other end of the first flow controller 3 is connected to one output end of the first three-way valve 7 and one output end of the second three-way valve 8 to output an air path, the other end of the second flow controller 4 is connected to the input end of the first three-way valve 7, the other end of the third flow controller 5 is connected to the input end of the second three-way valve 8, and the other end of the fourth flow controller 6 is connected to another output end of the first three-way valve 7 and another output end of the second three-way valve 8 to output another air path.

[0024] The filter 1 described in this embodiment is located at the front end of several flow controllers, and is used to filter hydrogen or air to protect the flow controllers; the first pressure sensor 2 is located at the rear end of the filter 1, and is used to monitor the pressure before hydrogen or air enters the flow controller; several flow controllers are connected in parallel, and the number of flow controllers is based on the maximum flow rate, and an additional dry gas flow controller is added. Among them, the preferred choice is that the first flow controller 3 is a dry gas flow controller, and the second flow controller 4, the third flow controller 5, and the fourth flow controller 6 are wet gas flow controllers by default.

[0025] Preferably, the three-way valve is a pneumatic valve or an electric valve, and the flow capacity in different directions is the same, and there is no dead zone.

[0026] The outlet flow directions of the second flow controller 4 and the third flow controller 5 are controlled by three-way valves.

[0027] Preferably, the flow rate of wet gas and the flow rate of dry gas are obtained by calculation.

[0028] The utility model can quickly control the flow ratio of dry gas and gas entering the humidification box through a flow controller to adjust the dew point temperature of the gas entering the fuel cell stack, accelerate the switching speed of the gas at high and low dew points, have a fast response speed, and reduce the energy consumption of the system; and adopts a method of adding a flow controller to a three-way switching valve, and utilizes the three-way valve to realize the flow distribution of dry gas and wet gas in the fuel cell test system, thereby improving the utilization rate of system components and reducing the size of the occupied space, greatly improving the utilization efficiency of the equipment, and further reducing the cost of the system; at the same time, the flow range of dry and wet gases is increased through the common flow controller for dry and wet gases, and the number of flow meters used is reduced.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A gas dew point control and switching device, characterized in that: It includes a gas filtering unit, a flow control unit, and a switching unit; the gas filtering unit, the flow control unit, and the switching unit are connected in sequence, wherein the switching unit divides the gas into two branches; The flow control unit comprises a first flow controller (3), a second flow controller (4), a third flow controller (5), and a fourth flow controller (6); one end of the first flow controller (3), one end of the second flow controller (4), one end of the third flow controller (5), and one end of the fourth flow controller (6) are connected to the gas filter unit, and the other end of the first flow controller (3), the other end of the second flow controller (4), the other end of the third flow controller (5), and the other end of the fourth flow controller (6) are connected to the switching unit.

2. A gas dew point control and switching device according to claim 1, characterized in that: The gas filtration unit comprises a filter (1) and a first pressure sensor (2); the filter (1) is connected to one end of the first pressure sensor (2), and the other end of the first pressure sensor (2) is connected to a flow control unit.

3. A gas dew point control and switching device according to claim 1, characterized in that: The switching unit comprises a first three-way valve (7) and a second three-way valve (8); the input end of the first three-way valve (7) is connected to the other end of the second flow controller (4), the input end of the second three-way valve (8) is connected to the other end of the third flow controller (5), one of the output ends of the first three-way valve (7) and one of the output ends of the second three-way valve (8) are connected to the other end of the first flow controller (3) to output an air path, and the other output end of the first three-way valve (7) and the other output end of the second three-way valve (8) are connected to the other end of the fourth flow controller (6) to output another air path.

4. A gas dew point control and switching device according to claim 1, characterized in that: The first flow controller (3) is a dry gas flow controller.

5. A gas dew point control and switching device according to claim 1, characterized in that: The second flow controller (4), the third flow controller (5), and the fourth flow controller (6) are wet gas flow controllers.

6. A gas dew point control and switching device according to claim 3, characterized in that: The three-way valve is a pneumatic valve or an electric valve.

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