CN215815959U

CN215815959U - Fuel cell humidifier

Info

Publication number: CN215815959U
Application number: CN202121497333.1U
Authority: CN
Inventors: 王红; 甄伟民; 沈聪; 澹台建礼; 甄梦
Original assignee: Hebei Kingston Technology Co ltd
Current assignee: Hebei Kingston Technology Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2022-02-11
Anticipated expiration: 2031-07-02

Abstract

The utility model discloses a fuel cell humidifier, which comprises a membrane shell, wherein a head end cap and a tail end cap are arranged at two ends of the membrane shell, a dry gas inlet and a wet gas outlet are arranged on the head end cap, a dry gas outlet and a wet gas inlet are arranged on the tail end cap, an annular gas inlet and an annular gas outlet are arranged on the side wall of the membrane shell, the annular gas inlet is communicated with the wet gas inlet, the annular gas outlet is communicated with the wet gas outlet, a plurality of hollow fiber membranes are inserted into the membrane shell, and sealing materials which are supported and fixed by epoxy casting are arranged at two ends of each hollow fiber membrane. This kind of fuel cell humidifier, when letting in humid air from the moisture import, get into the membrane shell from annular air inlet all the way, carry out layer upon layer humidification to the hollow fiber membrane, another way gets into and carries out the four scattered humidification in the moisture passageway through the connecting pipe, and two tunnel gases humidify, improve the area of contact on moisture and hollow fiber membrane surface, improve humidification effect and efficiency.

Description

Fuel cell humidifier

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a fuel cell humidifier.

Background

Generally, the humidification of an electrolyte membrane in a fuel cell (fuel cell) is important for the operation of the fuel cell, and therefore, the humidification device is used for humidifying reactant gas entering a fuel cell engine by the humidification device, so that the moisture content of a proton exchange membrane is kept in an optimal state, and the humidification device is an effective way for improving the performance of the fuel cell engine. Such a humidifying device operates such that dry gas supplied from the atmosphere to the fuel cell exchanges moisture with humid gas discharged from the fuel cell.

Publication No. CN206505974U discloses a fuel cell gas humidifier with a novel structure, which utilizes a novel structure to reasonably distribute the positions of the humidified gas inlets, so that the humidified gas can uniformly contact the hollow fiber membranes in the gas humidifier, thereby improving the efficiency of the gas humidifier and reducing the usage amount of the hollow fiber membranes. The fuel cell gas humidifier of this structure includes: the membrane shell comprises a head end, a tail end which corresponds to the head end and is positioned at the opposite side of the head end, and an air inlet and an air outlet which are arranged at the two ends; the hollow fiber membrane tube is positioned inside the membrane shell, and two ends of the hollow fiber membrane are respectively positioned at the head end and the tail end of the membrane shell; an end cap includes an air inlet and an air outlet.

However, in the above fuel cell gas humidifier, when in use, the humidified gas is merely permeated into the hollow fiber membranes through the annular gas inlet to be humidified, and in the case of particularly dense arrangement, the flow resistance of the moisture is increased, and the contact area of the moisture with the membrane surface is also reduced, which results in low humidification efficiency and poor humidification effect.

There is therefore a need for a fuel cell humidifier that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a fuel cell humidifier to solve the problems of low humidification efficiency and poor effect of similar products in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a fuel cell humidifier comprises a membrane shell, a head end cap and a tail end cap are arranged at two ends of the membrane shell, a dry gas inlet and a wet gas outlet are arranged on the head end cap, and the tail end cap is provided with a dry gas outlet and a wet gas inlet, the side wall of the membrane shell is provided with an annular gas inlet and an annular gas outlet, the annular gas inlet is communicated with the wet gas inlet, and the annular air outlet is communicated with the moisture outlet, a plurality of hollow fiber membranes are inserted in the membrane shell, and the two ends of the hollow fiber membrane are provided with sealing materials which are supported and fixed by epoxy casting, the sealing materials comprise a first sealing material and a second sealing material, the first sealing material is fixed with the inner side wall of the tail end cap, and the second sealing material is fixed with the inner side wall of the head end cap, and a diffusion mechanism convenient for moisture diffusion is arranged in the film shell.

Preferably, the diffusion mechanism comprises a moisture passage arranged in the membrane housing, and an air supply mechanism for supplying air to the moisture passage is arranged in the tail end cap.

Preferably, the moisture passage is arranged concentrically with the membrane housing.

Preferably, the air supply mechanism comprises an air inlet hole and an air outlet hole which are formed in the side wall of the first sealing material, and the air outlet hole is communicated with the moisture channel.

Preferably, a connecting pipe is fixedly connected between the air inlet hole and the air outlet hole.

Preferably, the connecting pipe is arranged in a U shape.

Preferably, the central tube is a plastic hard tube with a dead end.

Preferably, the side wall of the connecting pipe matched with the air inlet hole and the air outlet hole is provided with a sealing ring.

Compared with the prior art, the utility model has the beneficial effects that:

this kind of fuel cell humidifier, through setting up moisture passageway and connecting pipe etc, when letting in humid air from the moisture import, because increase the moisture passageway of the same kind at the center of subassembly, get into the membrane shell from annular air inlet all the way, carry out layer upon layer humidification to the hollow fiber membrane, another way carries out scattered humidification all around in getting into the moisture passageway through the connecting pipe, two tunnel gases humidify, improve the area of contact on moisture and hollow fiber membrane surface, improve humidification effect and efficiency, when reaching the same humidification purpose, the use quantity of the core part hollow fiber membrane of gaseous humidifier has been reduced, thereby the resource has been practiced thrift, the cost of gaseous humidifier has been reduced.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of a first sealing material according to the present invention;

fig. 3 is a schematic sectional view of the membrane housing according to the present invention.

In the figure: 1. a membrane housing; 2. a tail end cap; 3. a head end cap; 401. an air inlet; 402. an air outlet; 403. a moisture passage; 404. a connecting pipe; 405. a central tube; 5. an annular air outlet; 6. a dry gas inlet; 7. a hollow fiber membrane; 8. a moisture outlet; 901. a first sealing material; 902. a second sealing material; 10. an annular air inlet; 11. a wet gas inlet; 12. and a dry gas outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a fuel cell humidifier comprises a membrane shell 1, a head end cap 3 and a tail end cap 2 are arranged at two ends of the membrane shell 1, a dry gas inlet 6 and a wet gas outlet 8 are arranged on the head end cap 3, a dry gas outlet 12 and a wet gas inlet 11 are arranged on the tail end cap 2, an annular air inlet 10 and an annular air outlet 5 are arranged on the side wall of the membrane shell 1, the annular air inlet 10 is communicated with the wet gas inlet 11, the annular air outlet 5 is communicated with the wet gas outlet 8, a plurality of hollow fiber membranes 7 are inserted into the membrane shell 1, sealing materials which are supported and fixed by epoxy casting are arranged at two ends of each hollow fiber membrane 7, each sealing material comprises a first sealing material 901 and a second sealing material 902, each first sealing material 901 is fixed to the inner side wall of the tail end cap 2, each second sealing material 902 is fixed to the inner side wall of the head end cap 3, and a diffusion mechanism which is convenient for moisture diffusion is arranged in the membrane shell 1, when wet air is introduced from the wet air inlet 11, one path of wet air enters the membrane shell 1 from the annular air inlet 10 to humidify the hollow fiber membrane 7 layer by layer, the other path of wet air enters the wet air channel 403 through the connecting pipe 404 to humidify the hollow fiber membrane, and the two paths of air humidify the hollow fiber membrane 7, so that the contact area between the wet air and the surface of the hollow fiber membrane 7 is increased, and the humidifying effect and efficiency are improved.

Further, the diffusion mechanism comprises a moisture channel 403 arranged in the membrane housing 1, and an air supply mechanism for supplying air to the moisture channel 403 is arranged in the tail end cap 2, so that the contact area between moisture and the membrane surface of the hollow fiber membrane 7 is increased, and the humidifying effect and efficiency are improved.

Further, the moisture passage 403 is provided concentrically with the film housing 1, ensuring a moisture diffusion effect.

Further, the air supply mechanism comprises an air inlet 401 and an air outlet 402 which are arranged on the side wall of the first sealing material 901, and the air outlet 402 is communicated with the moisture channel 403, when the wet air is introduced from the moisture inlet 11, one path of the moisture channel 403 is added at the center of the component, and the other path enters the membrane housing 1 from the annular air inlet 10 to humidify the hollow fiber membrane 7 layer by layer, and the other path enters the moisture channel 403 through the connecting pipe 404 to humidify by four dispersion, so that two paths of air are humidified.

Further, a connecting pipe 404 is fixedly connected between the air inlet hole 401 and the air outlet hole 402, the other path of the air enters the moisture channel 403 through the connecting pipe 404 to be diffused and humidified, and the two paths of air are humidified.

Further, the connecting pipe 404 is in a U-shaped configuration, so as to ensure the air supply effect.

Further, the center tube 405 is a hard plastic tube with a dead end.

Further, the side walls of the connecting pipe 404, the air inlet 401 and the air outlet 402 are provided with sealing rings to ensure the sealing performance.

The working principle is as follows: when in use, firstly, when wet air is introduced from the wet air inlet 11, one path of wet air channel 403 is added in the center of the component, one path of wet air channel enters the membrane shell 1 from the annular air inlet 10 to humidify the hollow fiber membrane 7 layer by layer, the other path of wet air channel enters the wet air channel 403 through the connecting pipe 404 to humidify in a scattered manner, and two paths of air are used for humidifying, so that the contact area between the wet air and the membrane surface of the hollow fiber membrane 7 is increased, and the humidifying effect and efficiency are improved.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A fuel cell humidifier comprising a membrane housing (1), characterized in that: the membrane comprises a membrane shell (1), wherein a head end cap (3) and a tail end cap (2) are arranged at two ends of the membrane shell (1), a dry gas inlet (6) and a wet gas outlet (8) are arranged on the head end cap (3), a dry gas outlet (12) and a wet gas inlet (11) are arranged on the tail end cap (2), an annular gas inlet (10) and an annular gas outlet (5) are arranged on the side wall of the membrane shell (1), the annular gas inlet (10) is communicated with the wet gas inlet (11), the annular gas outlet (5) is communicated with the wet gas outlet (8), a plurality of hollow fiber membranes (7) are inserted into the membrane shell (1), sealing materials which are supported and fixed by epoxy casting are arranged at two ends of each hollow fiber membrane (7), each sealing material comprises a first sealing material (901) and a second sealing material (902), and the first sealing materials (901) are fixed with the inner side wall of the tail end cap (2), and the second sealing material (902) is fixed with the inner side wall of the head end cap (3), and a diffusion mechanism convenient for moisture diffusion is arranged in the membrane shell (1).

2. A fuel cell humidifier according to claim 1, wherein: the diffusion mechanism comprises a moisture channel (403) arranged in a membrane shell (1), a central tube (405) is inserted into the moisture channel (403), the lower end of the central tube (405) is fixed with the upper side wall of a second sealing material (902), and an air supply mechanism for supplying air to the moisture channel (403) is arranged in the tail end cap (2).

3. A fuel cell humidifier according to claim 2, wherein: the moisture channel (403) is arranged concentrically to the membrane housing (1).

4. A fuel cell humidifier according to claim 2, wherein: the air supply mechanism comprises an air inlet hole (401) and an air outlet hole (402) which are arranged on the side wall of the first sealing material (901), and the air outlet hole (402) is communicated with the moisture channel (403).

5. A fuel cell humidifier according to claim 4, wherein: and a connecting pipe (404) is fixedly connected between the air inlet hole (401) and the air outlet hole (402).

6. A fuel cell humidifier according to claim 5, wherein: the connecting pipe (404) is arranged in a U shape.

7. A fuel cell humidifier according to claim 2, wherein: the central tube (405) is a plastic hard tube with a sealed end.

8. A fuel cell humidifier according to claim 5, wherein: and sealing rings are arranged on the side walls of the connecting pipe (404), the air inlet hole (401) and the air outlet hole (402) which are matched with each other.