Fuel cell air filter element with primary filtering function

Abstract

The utility model relates to the technical field of fuel cell air filter elements, and discloses a fuel cell air filter element with primary filtration, which comprises an upper cover, an air filter element layer and a lower cover, the air filter element layer is formed by overlapping a first filter layer and a second filter layer; the first filter layer is formed by sequentially overlapping a filter element inner protective net, a filter material layer and a filter element outer protective net; one end of the first filter layer is arranged in the upper cover special mold and is integrally cast with the upper cover, and the other end of the first filter layer is arranged in the lower cover special mold and is integrally cast with the lower cover; and the second filter layer is fixed on the outer side of the filter element outer protective net. The utility model can effectively pre-filter large-particle impurities to reduce the burden of the air filter element of the fuel cell, prolong the service life of the filter element, specifically adsorb acid-base substances in the air, prolong the treatment time of harmful atmosphere to improve the purification efficiency, and reduce the environmental pollution. In addition, the design of the magic tapes is adopted, so that the maintenance efficiency and economy of the air filter element of the fuel cell are further obviously optimized, the service life is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell air filter elements, in particular to a fuel cell air filter element with primary filtration. Background Art

[0002] The fuel cell air filter is a filter element used in the cathode air intake system of hydrogen fuel cells, installed in the cathode air filter of the air intake system. The electric energy of the fuel cell is generated by the reaction of hydrogen and oxygen, and the oxygen is obtained from the air. However, harmful atmospheres such as sulfur dioxide, nitrogen oxides, butane, and ammonia in the air will affect the hydrogen-oxygen reaction and damage and poison the proton membrane of the battery stack. Therefore, these harmful atmospheres must be removed.

[0003] Currently, the use of air filters with multi-layer filtration can effectively remove the above-mentioned harmful atmosphere and suspended particles in the air. However, the concentration of harmful atmosphere and particulate impurities in the ambient atmosphere is greatly affected by the region, place of use and season, which makes the filtration efficiency and life of air filters vary greatly, directly resulting in different energy efficiency and life of fuel cells of the same specification, and ultimately increasing the maintenance cost of hydrogen fuel cells.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] In view of the above-mentioned technical deficiencies, the technical problem to be solved by the utility model is to provide a fuel cell air filter with primary filtration, aiming to solve the problem that the current fuel cell air filter is greatly affected by the region, place of use and season, the filtration efficiency and life of the air filter vary greatly, resulting in different energy efficiency and life of fuel cells of the same specification, and ultimately leading to an increase in the maintenance cost of hydrogen fuel cells.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: The utility model provides a fuel cell air filter element with primary filtration, including: an upper cover, an air filter element layer and a lower cover; the air filter element layer is formed by superimposing a first filter layer and a second filter layer; the first filter layer includes a filter element inner protective net, a filter material layer, and a filter element outer protective net which are superimposed in sequence; one end of the first filter layer is installed in a special mold for the upper cover and cast into one piece with the upper cover, and the other end of the first filter layer is installed in a special mold for the lower cover and cast into one piece with the lower cover; the second filter layer is fixed on the outside of the filter element outer protective net.

[0007] Furthermore, polyurethane foam sealant is used for casting to ensure the sealing of the first filter layer.

[0008] Furthermore, the second filter layer is fixed to the outside of the outer protective net of the filter element by means of Velcro.

[0009] Furthermore, the inner protective net and the outer protective net of the filter element are formed by punching and forming steel plates into a round hole mesh or a diamond mesh, and are protected by electrophoretic electrostatic spraying of paint.

[0010] Furthermore, the second filter layer is a composite filter material containing chemically reactive non-woven fabric and nylon material.

[0011] Furthermore, the filter material layer includes a pre-filtration layer, an ultrafine fiber layer, an activated carbon layer and a support layer;

[0012] Among them, the pre-filtration layer is a non-woven filter material with a filtration accuracy of 10-50 microns, the ultrafine fiber layer is a melt-blown filter material with a filtration accuracy of 0.2-5 microns, the activated carbon layer is granular activated carbon ranging from 30 mesh to 100 mesh and alkaline substances that can absorb acidic atmosphere / acidic substances that can absorb alkaline atmosphere; the supporting layer is PET non-woven fabric.

[0013] Furthermore, the filter material layer is folded into a zigzag structure.

[0014] Furthermore, it also includes: selecting a second filter layer with different coating materials according to the actual use environment of the fuel cell.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model adds a primary filter layer as the primary filter of the entire air filter element. The primary filter layer is a composite filter material containing non-woven fabrics and nylon materials with chemical reaction ability. The filtration accuracy is 50-200 microns. It removes large particle impurities in the air through pre-filtration, reduces the filtration load of the first filter layer, and prolongs the service life of the filter element;

[0017] 2. The primary filter layer of the utility model is pre-coated with alkaline substances that can absorb acidic atmospheres or acidic substances that can absorb alkaline atmospheres, and can also be coated with alkaline and acidic substances that can absorb acidic atmospheres and alkaline atmospheres respectively at the same time, which prolongs the reaction time between the acidic or alkaline harmful atmosphere in the air and the air filter element, and improves the treatment efficiency of the entire air filter element for harmful atmospheres;

[0018] 3. The primary filter layer of the utility model is wrapped with Velcro on the outer protective net of the filter element, and dust removal can be performed separately, further improving the service life of the fuel cell air filter element. When the primary filter layer reaches the end of its life, it can also be replaced separately, reducing the maintenance cost of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic structural diagram of a fuel cell air filter element with primary filtration provided in an embodiment of the utility model.

[0021] Figure 2 for Figure 1 Top view of the .

[0022] Figure 3 Schematic diagram of the primary filtration layer.

[0023] Explanation of the accompanying drawings: 1. upper cover, 2. air filter layer, 3. lower cover, 21. first filter layer, 22. second filter layer, 211. filter inner protective net, 212. filter material layer, 213. filter outer protective net, 23. Velcro, 221. activated carbon sponge filter layer, 222. activated carbon non-woven filter layer. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] like Figures 1 to 3 As shown, the utility model provides a fuel cell air filter element with primary filtration, comprising:

[0027] Upper cover 1, air filter layer 2 and lower cover 3;

[0028] The air filter layer 2 is formed by stacking a first filter layer 21 and a second filter layer 22;

[0029] The first filter layer 21 includes a filter element inner protective net 211, a filter material layer 212, and a filter element outer protective net 213 stacked in sequence;

[0030] One end of the first filter layer 21 is loaded into a special mold for the upper cover and cast into one piece with the upper cover 1, and the other end of the first filter layer 21 is loaded into a special mold for the lower cover and cast into one piece with the lower cover 3; the second filter layer 22 is fixed to the outside of the outer protective net 213 of the filter element; the second filter layer 22 is fixed to the outside of the outer protective net 213 of the filter element by a Velcro 23; wherein, polyurethane foam sealant is used for casting. It should be noted that: the upper cover 1 and the lower cover 3 are made of urethane foam sealant material, and are cast in a special mold. Before the injection production, the inner protective net 211 of the filter element, the filter material layer 212, and one end of the outer protective net 213 of the filter element are first loaded into the special mold for the upper cover according to the designed position and cast into one piece with the upper cover at the same time; after the cast polyurethane foam sealant is solidified, the other end is loaded into the special mold for the lower cover and cast into one piece with the lower cover at the same time. After the poured polyurethane foam sealant is cured, the second filter layer 22 is self-adhesively fixed to the outside of the filter element outer protective net 213 by using the Velcro 23. In the structure of this embodiment, air is taken in from the outside of the air filter element 2, and the airflow enters the second filter layer 22 and the filter material layer 212, and the air is filtered and finely filtered. The acidic and alkaline atmospheres in the air are removed through the dual effects of chemical reaction and physical adsorption. The filtered air is introduced into the air intake of the fuel cell stack through the inner side of the filter element inner protective net 211.

[0031] Preferably, the second filter layer 22 is a composite filter material of non-woven fabric and nylon material having the ability to chemically react with harmful atmospheres in the air, such as an activated carbon sponge filter layer 221 and an activated carbon non-woven fabric filter layer 222. At the same time, because the non-woven fabric and nylon material are microporous materials of a certain thickness, they can also absorb large particles of suspended impurities in the air. The second filter layer 22 is fixed to the outside of the filter element outer protective net 213 by the Velcro 23, so the second filter layer 22 can be dust-removed separately, further improving the service life of the fuel cell air filter element. When the service life of the second filter layer 22 ends, it can also be replaced separately, reducing the maintenance cost of the fuel cell; the filter element inner protective net 211 and the filter element outer protective net 213 are formed by punching and forming steel plates into a circular mesh or a diamond mesh, and then anti-corrosion is achieved by electrophoresis electrostatic spraying paint; it should be noted that: the non-woven fabric material and the nylon material are pre-coated with alkaline substances that can absorb acidic atmospheres or acidic substances that can absorb alkaline atmospheres, and can also be coated with alkaline and acidic substances that can absorb acidic atmospheres and alkaline atmospheres respectively at the same time; the user can also select a second filter layer 22 with different coating materials according to the actual use environment of the fuel cell engine to extend the service life of the fuel cell air filter and further avoid fuel cell catalyst poisoning leading to stack performance degradation and premature termination of life.

[0032] The filter material layer 212 includes a pre-filter layer, an ultra-fine fiber layer, an activated carbon layer and a support layer; wherein the pre-filter layer is a non-woven filter material with a filtration accuracy of 10-50 microns, the ultra-fine fiber layer is a melt-blown filter material with a filtration accuracy of 0.2-5 microns, and the activated carbon layer is granular activated carbon with a mesh size of 30-100 and alkaline substances that absorb acidic atmospheres or acidic substances that absorb alkaline atmospheres; the support layer is PET non-woven fabric; the filter material layer 212 is folded and processed into Figure 2 The sawtooth structure shown can ensure that when the air to be filtered passes through the filter material layer 212, the filter material has a maximum area in contact with the filter material, thereby improving the efficiency of removing harmful atmosphere.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fuel cell air filter element with primary filtration, characterized in that: include: An upper cover (1), an air filter layer (2) and a lower cover (3); the air filter layer (2) is formed by stacking a first filter layer (21) and a second filter layer (22); the first filter layer (21) comprises a filter inner protective net (211), a filter material layer (212) and a filter outer protective net (213) which are stacked in sequence; one end of the first filter layer (21) is placed in a special mold for the upper cover and cast into one piece with the upper cover (1), and the other end of the first filter layer (21) is placed in a special mold for the lower cover and cast into one piece with the lower cover (3); the second filter layer (22) is fixed on the outside of the filter outer protective net (213).

2. A fuel cell air filter element with primary filtration as claimed in claim 1, characterized in that: Polyurethane foam sealant is used for casting to ensure the sealing of the first filter layer (21).

3. A fuel cell air filter element with primary filtration as claimed in claim 1, characterized in that: The second filter layer (22) is fixed to the outside of the filter element outer protective net (213) by means of a Velcro tape (23).

4. A fuel cell air filter element with primary filtration as claimed in claim 1, characterized in that: The filter element inner protective net (211) and the filter element outer protective net (213) are formed by punching and shaping steel plates into a round hole mesh or a diamond mesh, and are protected by electrophoretic electrostatic spraying of paint.

5. A fuel cell air filter element with primary filtration as claimed in claim 1, characterized in that: The second filter layer (22) is a composite filter material containing chemically reactive non-woven fabric and nylon material.

6. A fuel cell air filter element with primary filtration as claimed in claim 1, characterized in that: The filter material layer (212) comprises a pre-filter layer, an ultrafine fiber layer, an activated carbon layer and a support layer; Among them, the pre-filtration layer is a non-woven filter material with a filtration accuracy of 10-50 microns, the ultrafine fiber layer is a melt-blown filter material with a filtration accuracy of 0.2-5 microns, the activated carbon layer is granular activated carbon ranging from 30 mesh to 100 mesh and alkaline substances that can absorb acidic atmosphere / acidic substances that can absorb alkaline atmosphere; the supporting layer is PET non-woven fabric.

7. A fuel cell air filter element with primary filtration as claimed in claim 1, characterized in that: The filter material layer (212) is folded into a zigzag structure.

8. A fuel cell air filter element with primary filtration as claimed in claim 1, characterized in that: Also includes: The second filter layer (22) with different coating materials is selected according to the actual use environment of the fuel cell.

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