Air filter service life detection device and hydrogen fuel cell system

Abstract

The utility model relates to the field of fuel cells, and discloses an air filter life detection device and a hydrogen fuel cell system, comprising an air filter main body, a detection main body, a main pipeline and a bypass pipeline, the air filter main body is connected with the main pipeline, and the detection main body is connected with the bypass pipeline. An inlet of the bypass pipeline is connected to the main pipeline and located in front of an inlet of the air filter body, and an outlet of the bypass pipeline is connected to the main pipeline and located behind an outlet of the air filter body. The utility model has the beneficial effects that the color of the detection main body is changed when the detection main body encounters harmful gas, so that the life allowance condition of chemical filtration can be intuitively observed, and a user can conveniently formulate a more scientific air filter replacement scheme, thereby saving resources and protecting a fuel cell stack from being influenced by the harmful gas.

Description

Technical Field

[0001] The utility model relates to the field of fuel cells, in particular to an air filter life detection device and a hydrogen fuel cell system. Background Art

[0002] During the operation of a hydrogen fuel cell system, clean air is required, so an air filter is needed. This air filter not only needs to filter large particles such as dust (physical filtration), but also needs to filter chemical gases harmful to fuel cells such as SO2 and NH3 (chemical filtration). For physical filtration, after intercepting the particulate matter, the particulate matter will accumulate on the air filter, thus blocking the gas flow and increasing the flow resistance. Therefore, the life of the air filter can be judged by detecting the flow resistance (pressure drop), and the air filter indicator is made using this principle.

[0003] However, for chemical filtration, after adsorbing harmful gases such as SO2 and NH3, it does not affect the relevant parameters such as the flow resistance of the air filter. Therefore, it is impossible to intuitively judge the life situation of chemical filtration. Currently, the general method for determining the life of chemical filtration is that after the air filter is used for a period of time, it is sent to a laboratory, and the adsorption margin is detected by introducing excessive harmful gases, and the replacement cycle of chemical filtration in this area is set based on this. However, this method has the following problems: 1. It is impossible to effectively and intuitively judge the life margin of chemical filtration; 2. The air quality in each area is different. To accurately set the replacement cycle in this area, the air filter needs to be sent to the laboratory for testing, which is costly; 3. If the set replacement cycle is inaccurate, there will be a situation of resource waste or damage to the fuel cell. For example, if the replacement cycle < the life of chemical filtration, there will be resource waste; if the replacement cycle > the life of chemical filtration, harmful gases cannot be effectively filtered, thus damaging the fuel cell. Summary of the Utility Model

[0004] The purpose of this application is to provide an air filter life detection device and a hydrogen fuel cell system to visually observe the life margin of chemical filtration.

[0005] The purpose of this application is achieved through the following technical solutions:

[0006] An air filter life detection device includes: an air filter main body, a detection main body, a main pipeline, and a bypass pipeline. The air filter main body is connected to the main pipeline, the detection main body is connected to the bypass pipeline, the detection main body is used to react with chemical gases and change color, the inlet of the bypass pipeline is connected to the main pipeline and is located before the inlet of the air filter main body, and the outlet of the bypass pipeline is connected to the main pipeline and is located after the outlet of the air filter main body.

[0007] In some embodiments of the present application, it further includes a one-way breather valve, which is installed on the bypass pipeline and used to restrict the flow of gas from the outlet of the bypass pipeline to the inlet of the bypass pipeline.

[0008] In some embodiments of the present application, it further includes an air compressor, which is installed on the main pipeline and is located after the outlet of the bypass pipeline.

[0009] In some embodiments of the present application, the detection body includes a color-changing agent and a containing bottle. The color-changing agent is arranged in the containing bottle, and the bypass pipeline communicates through the containing bottle.

[0010] In some embodiments of the present application, filter nets are respectively arranged at the inlet and outlet of the containing bottle.

[0011] In some embodiments of the present application, the containing bottle is a transparent bottle.

[0012] In some embodiments of the present application, before the reaction of the color-changing agent, the color-changing agent is colorless.

[0013] In some embodiments of the present application, the flow rate of the bypass pipeline is smaller than that of the main pipeline.

[0014] In some embodiments of the present application, the flow rate of the bypass pipeline is at most 1 / 100 of that of the main pipeline.

[0015] A hydrogen fuel cell system includes the air filter life detection device as described above.

[0016] For the air filter life detection device and the hydrogen fuel cell system of the present application, the air filter main body can play a role in filtering air to achieve the filtering of various substances such as dust and harmful gases. The air filter main body is connected to the main pipeline for introducing air. The detection body is installed in parallel with the air filter main body and is connected to the bypass pipeline. When the detection body encounters harmful gases, it changes color, so that the remaining life of chemical filtration can be visually observed, which is convenient for users to formulate a more scientific air filter replacement plan to save resources and protect the fuel cell stack from the influence of harmful gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the air filter life detection device of the present application.

[0018] In the figure, 1 is the air filter main body; 2 is the detection body; 21 is the color-changing agent; 22 is the containing bottle; 3 is the main pipeline; 4 is the bypass pipeline; 5 is the one-way breather valve; 6 is the air compressor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will further describe in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0020] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. adopted in the present application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the connection inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] As Figure 1 shown, a first aspect of the embodiment of the present application provides an air filter life detection device, including: an air filter main body 1, a detection main body 2, a main pipeline 3, and a bypass pipeline 4. The air filter main body 1 is connected to the main pipeline 3, the detection main body 2 is connected to the bypass pipeline 4, the detection main body 2 is used to change color when reacting with chemical gases, the inlet of the bypass pipeline 4 is connected to the main pipeline 3 and is located before the inlet of the air filter main body 1, and the outlet of the bypass pipeline 4 is connected to the main pipeline 3 and is located after the outlet of the air filter main body 1.

[0023] Based on the above technical solution, in the air filter life detection device of the present application, the air filter main body 1 can play a role in filtering air to achieve the filtration of various substances such as dust and harmful gases. The air filter main body 1 is connected to the main pipeline 3 for introducing air. The detection main body 2 is installed in parallel with the air filter main body 1 and is connected to the bypass pipeline 4. When the detection main body 2 encounters harmful gases, it changes color, so that the remaining life of chemical filtration can be visually observed, which is convenient for users to formulate a more scientific air filter replacement plan to save resources and protect the fuel cell stack from the influence of harmful gases.

[0024] In some embodiments of the present application, as Figure 1As shown, it further includes a one-way breathing valve 5 which is installed on the bypass pipeline 4 and used to restrict the flow of gas from the outlet of the bypass pipeline 4 to the inlet of the bypass pipeline 4. The function of the one-way breathing valve 5 is to allow the gas to flow unidirectionally, prevent the gas passing through the detection main body 2 from flowing back into the detection main body 2 again, affect the normal use of the detection main body 2, and improve the detection accuracy and service life of the detection main body 2.

[0025] In some embodiments of the present application, as Figure 1 shown, it further includes an air compressor 6 which is installed on the main pipeline 3 and is located after the outlet of the bypass pipeline 4. The air compressor 6 can suck in external gas and provide power for the gas to enter the main pipeline 3 and the bypass pipeline 4. Specifically, when the air compressor 6 is started, the gas enters the air filter main body 1 from the outside through the main pipeline 3, and at the same time, it will be introduced into the detection main body 2 from a bypass pipeline 4.

[0026] In some embodiments of the present application, as Figure 1 shown, the detection main body 2 includes a color-changing agent 21 and a containing bottle 22. The color-changing agent 21 is arranged in the containing bottle 22, and the bypass pipeline 4 communicates through the containing bottle 22. The color-changing agent 21 is used to chemically react with harmful gases to change color. Generally, a specific substance is generated after the reaction, or the color change occurs through other principles. For example, SO2 will turn red when it meets litmus reagent. This color change can be visually observed, and the amount of reacted substances can be judged by the depth of the color change, so as to infer the remaining life of the chemical filtration. The containing bottle 22, as the container of the color-changing agent 21, can prevent the color-changing agent 21 from directly contacting the external air, but only contact the gas sent through the bypass pipeline 4, thereby improving the detection accuracy and service life.

[0027] Specifically, as Figure 1 shown, filter meshes are respectively provided at the inlet and outlet of the containing bottle 22. The filter meshes can not only filter out solid and particulate impurities in the air, but also prevent the leakage of the color-changing agent 21 and improve the reliability of the detection main body 2.

[0028] Specifically, as Figure 1 shown, the containing bottle 22 is a transparent bottle. The color-changing agent 21 is installed in the transparent bottle, and its color change can be more conveniently observed by the user without disassembling the containing bottle 22.

[0029] Specifically, as Figure 1 shown, before the reaction of the color-changing agent 21, the color-changing agent 21 is colorless. The colorless color-changing agent 21 gradually deepens in color as the reaction increases, and can be visually observed. Finally, the amount of reacted substances is judged by the depth of the color, so as to infer the remaining life of the chemical filtration.

[0030] In some embodiments of the present application, as Figure 1 shown, the flow rate of the bypass pipe 4 is smaller than that of the main pipe 3. Since the detection body 2 installed on the bypass pipe 4 is only suitable for detecting the life indicating chemical filtration, its gas flow rate does not need to be too large, otherwise it will cause waste in the use of the discoloring agent 21, that is, more discoloring agent 21 is needed to correctly reflect the life of the air filter body 1, resulting in an increase in cost.

[0031] In some embodiments of the present application, as Figure 1 shown, the flow rate of the bypass pipe 4 is at most 1 / 100 of the flow rate of the main pipe 3. In order to further reduce the consumption of the discoloring agent 21, the flow rate of the bypass pipe 4 is set at most to 1 / 100 of the main pipe 3. On the premise of not wasting the discoloring agent 21, the function of indicating the life of the air filter body 1 can be normally realized.

[0032] A hydrogen fuel cell system includes the air filter life detection device as described above. The hydrogen fuel cell system of the present application includes the above-mentioned air filter life detection device, and thus has all the above-mentioned beneficial effects, which will not be elaborated here.

[0033] In summary, for the air filter life detection device and the hydrogen fuel cell system of the present application, the air filter body 1 can play a role in filtering air to achieve the filtration of various substances such as dust and harmful gases. The air filter body 1 is connected to the main pipe 3 for introducing air. The detection body 2 is installed in parallel with the air filter body 1 and is connected to the bypass pipe 4. The detection body 2 changes color when encountering harmful gases, so that the remaining life of the chemical filtration can be intuitively observed, which is convenient for users to formulate a more scientific air filter replacement plan to save resources and protect the fuel cell stack from the influence of harmful gases.

[0034] The above is only the preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present application.

Claims

1. An air filter life detection device, characterized in that Comprising: An air filter main body, a detection main body, a main pipeline and a bypass pipeline. The air filter main body is connected to the main pipeline, the detection main body is connected to the bypass pipeline. The detection main body is used to react with chemical gas and change color. The inlet of the bypass pipeline is connected to the main pipeline and is located before the inlet of the air filter main body, and the outlet of the bypass pipeline is connected to the main pipeline and is located after the outlet of the air filter main body.

2. The air filter life detection device according to claim 1, characterized in that, It further comprises a one-way air permeable valve which is installed on the bypass pipeline and is used to restrict the gas from flowing from the outlet of the bypass pipeline to the inlet of the bypass pipeline.

3. The air filter life detection device according to claim 1, characterized in that, It further comprises an air compressor which is installed on the main pipeline and is located after the outlet of the bypass pipeline.

4. The air filter life detection device according to claim 1, characterized in that, The detection main body comprises a color-changing agent and a containing bottle. The color-changing agent is arranged in the containing bottle, and the bypass pipeline communicates through the containing bottle.

5. The air filter life detection device according to claim 4, characterized in that, Filter meshes are respectively provided at the inlet and the outlet of the containing bottle.

6. The air filter life detection device according to claim 4, characterized in that, The containing bottle is a transparent bottle.

7. The air filter life detection device according to claim 4, characterized in that, Before the color-changing agent reacts, the color-changing agent is colorless.

8. The air filter life detection device according to claim 1, characterized in that, The flow rate of the bypass pipeline is smaller than that of the main pipeline.

9. The air filter life detection device according to claim 8, wherein The flow rate of the bypass pipeline is at most 1 / 100 of the flow rate of the main pipeline.

10. A hydrogen fuel cell system, characterized in that, An air filter life detection device comprising any one of claims 1-9.

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