CN214705993U

CN214705993U - Air compressor unit for hydrogen fuel cell

Info

Publication number: CN214705993U
Application number: CN202121067091.2U
Authority: CN
Inventors: 顾茸蕾; 朱明明
Original assignee: Hedwell Taicang Energy Technology Co ltd
Current assignee: Hedwell Taicang Energy Technology Co ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2021-11-12
Anticipated expiration: 2031-05-18

Abstract

The utility model discloses an air compressor unit for hydrogen fuel cell, including empty straining, valve, A group's one-level compressor intake pipe, A group's one-level compressor, first motor, A group's connecting pipe, A group's second grade compressor, B group's one-level compressor intake pipe, B group's one-level compressor, second motor, B group's connecting pipe, B group's second grade compressor, A group's second grade compressor outlet duct, B group's second grade compressor outlet duct, intercooler, humidifier and humidifier outlet duct. One end of an output shaft of the first motor is connected with a pressing wheel of the A group of first-stage compressors, and the other end of the output shaft of the first motor is connected with a pressing wheel of the A group of second-stage compressors; one end of an output shaft of the second motor is connected with the pressing wheel of the B group of first-stage compressors, and the other end of the output shaft of the second motor is connected with the pressing wheel of the B group of second-stage compressors; two-stage compressors in the group A and the group B are respectively compressed in series; and finally, the group A and the group B are connected in parallel, and compressed air enters the fuel cell stack after being cooled and humidified. The utility model discloses the device has high pressure ratio and flow, and flow adjustable range is big.

Description

Air compressor unit for hydrogen fuel cell

Technical Field

The utility model relates to an air compressor machine field especially relates to an air compressor unit for hydrogen fuel cell.

Background

The proton exchange membrane type fuel cell system is a high-efficiency clean new energy power system, compressed air is sent to the cathode of the fuel cell, oxygen in the compressed air and hydrogen at the anode are subjected to electrochemical reaction, the generated products are electricity and water, partial heat is discharged to the atmosphere along with redundant air, and except that no other products polluting the environment exist, therefore, the hydrogen fuel cell power system is vigorously developed and popularized.

The air compressor special for the fuel cell is a very important part in a hydrogen fuel cell power system, and is used for providing compressed air with certain pressure and certain flow for the cathode of the fuel cell so as to meet the requirement of chemical reaction of the fuel cell on oxygen in the air. Most of fuel cell air compressors in the current market are single-stage compressors and two-stage compressors. The single-stage compression is that a motor drives a pinch roller, the two-stage compression is that a motor drives two pinch rollers, one is the low-pressure stage, another is the high-pressure stage, high-pressure stage and low-pressure stage are established ties, the air reentries the high-pressure stage after the low-pressure stage compression and carries out the second compression, so the air pressure and the flow that the two-stage compressor obtained than the single-stage compressor are higher, the applicable fuel cell power range can be a bit bigger, single-stage compression is used for the miniwatt fuel cell stack at present, the two-stage compression is used for well high power fuel cell stack more.

At present, the application range of the fuel cell mainly focuses on the field of light commercial vehicles, such as buses, logistics vehicles, trucks and the like, and the power of the electric pile required by heavy commercial vehicles, such as heavy trucks, muck vehicles, heavy machinery and the like, is much larger than that of the light commercial vehicles, so the pressure and flow requirements of the air compressor are also much larger. The existing single-stage compressor and two-stage compressor can not meet the requirements. If the motor power and the size of the air compressor are continuously improved to meet the requirements of the galvanic pile, many difficulties are caused, for example, low-load and high-load working conditions cannot be considered, the motor power is too high, the surge margin is insufficient, and the like, so that the popularization difficulty is high, the cost is high, and the feasibility is not strong. The market needs the combination of many compressors, provides the big flow compressed air of pressure, and the adjustment range of flow is big moreover.

Accordingly, those skilled in the art have been made in an effort to develop a new air compressor set for a hydrogen fuel cell to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to increase the flow rate and pressure of the compressed air.

In order to achieve the purpose, the utility model provides an air compressor unit for hydrogen fuel cell, including empty straining, valve, A group's first-order compressor intake pipe, A group's first-order compressor, first motor, A group's connecting gas pipe, A group's second grade compressor, B group's first-order compressor intake pipe, B group's first-order compressor, second motor, B group's connecting gas pipe, B group's second grade compressor, A group's second grade compressor outlet duct, B group's second grade compressor outlet duct, intercooler, humidifier and humidifier outlet duct; one end of an output shaft of the first motor is connected with the pinch roller of the A group of primary compressors, and the other end of the output shaft of the first motor is connected with the pinch roller of the A group of secondary compressors; one end of an output shaft of the second motor is connected with the pinch roller of the B group of primary compressors, and the other end of the output shaft of the second motor is connected with the pinch roller of the B group of secondary compressors; the air compressed by the A group of first-stage compressors enters the A group of second-stage compressors, is compressed in the A group of second-stage compressors and enters the air outlet pipe of the A group of second-stage compressors; the air compressed by the B group of first-stage compressors enters the B group of second-stage compressors, is compressed in the B group of second-stage compressors and enters the B group of second-stage compressor air outlet pipes; the compressed air of the group A and the compressed air of the group B are converged, enter the intercooler for cooling, are humidified by the humidifier and enter the fuel cell stack, and part of oxygen and hydrogen are subjected to chemical reaction to generate electricity and water.

Further, the valve is an electric control three-way valve; and the air inlet of the valve is connected with the air filter through a pipe.

Furthermore, there are two air outlets of the valve, which are respectively connected with the air inlet pipe of the group A of first-stage compressors and the air inlet pipe of the group B of first-stage compressors.

Furthermore, the tail end of the air inlet pipe of the A group of first-stage compressors is connected with an air inlet of the A group of first-stage compressors.

Furthermore, the tail end of the air inlet pipe of the group B of first-stage compressors is connected with an air inlet of the group B of first-stage compressors.

Furthermore, one end of the group A connecting air pipe is connected with an air outlet of the group A primary compressor, and the other end of the group A connecting air pipe is connected with an air inlet of the group A secondary compressor.

Furthermore, one end of the group B connecting air pipe is connected with an air outlet of the group B primary compressor, and the other end of the group B connecting air pipe is connected with an air inlet of the group B secondary compressor.

Further, the air outlet pipe of the group A of secondary compressors and the air outlet pipe of the group B of secondary compressors are connected with the air inlet of the intercooler in a converging manner.

Further, the air outlet of the intercooler is connected with the air inlet of the humidifier through a pipe.

Furthermore, the air outlet of the humidifier is connected with the air inlet of the cathode through the air outlet pipe of the humidifier

The technical effect of the utility model is that, the utility model discloses there are four compressors, wherein parallelly connected again after two liang of series connections, and large-traffic demand both can be guaranteed to this kind of scheme, also can satisfy the high pressure ratio demand. In addition, because the air compressor unit adopts two motors, the power of the motors is lower, the air compressor unit saves energy compared with the air compressor unit adopting a single high-power motor, the flow adjustable range is large, and the requirements of hydrogen fuel cells under different working conditions can be met. The surge boundary under the low-speed working condition can be ensured to be wider, and the surge risk is lower.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 is a schematic diagram of an air compressor assembly for a hydrogen fuel cell in accordance with a preferred embodiment of the present invention;

the air filter comprises 1-air filter, 2-valve, 3-A group of first-stage compressor air inlet pipes, 4-A group of first-stage compressors, 5-first motor, 6-A group of connecting air pipes, 7-A group of second-stage compressors, 8-B group of first-stage compressor air inlet pipes, 9-B group of first-stage compressors, 10-second motor, 11-B group of connecting air pipes, 12-B group of second-stage compressors, 13-A group of second-stage compressor air outlet pipes, 14-B group of second-stage compressor air outlet pipes, 15-intercooler, 16-humidifier, 17-humidifier air outlet pipes, 18-cathode, 19-fuel cell stack and 20-anode.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

As shown in fig. 1, an air compressor unit for a hydrogen fuel cell comprises an air filter 1, a valve 2, a group a of first-stage compressor air inlet pipes 3, a group a of first-stage compressors 4, a first motor 5, a group a of connecting air pipes 6, a group a of second-stage compressors 7, a group B of first-stage compressor air inlet pipes 8, a group B of first-stage compressors 9, a second motor 10, a group B of connecting air pipes 11, a group B of second-stage compressors 12, a group a of second-stage compressor air outlet pipes 13, a group B of second-stage compressor air outlet pipes 14, an intercooler 15, a humidifier 16 and a humidifier air outlet pipe 17. One end of an output shaft of the first motor 5 is connected with a pressing wheel of the A group of first-stage compressors 4, and the other end of the output shaft is connected with a pressing wheel of the A group of second-stage compressors 7; one end of an output shaft of the second motor 10 is connected with a pressing wheel of the B group of first-stage compressors 9, and the other end of the output shaft is connected with a pressing wheel of the B group of second-stage compressors 12; the air compressed by the A group of first-stage compressors 4 enters the A group of second-stage compressors 7, is compressed in the A group of second-stage compressors 7 and enters the A group of second-stage compressor air outlet pipes 13; the air compressed by the B group of first-stage compressors 9 enters the B group of second-stage compressors 12, is compressed in the B group of second-stage compressors 12 and enters the B group of second-stage compressor air outlet pipes 14; the compressed air of the group A and the compressed air of the group B are converged, enter an intercooler 15 for cooling, and then enter a fuel cell stack 19 after being humidified by a humidifier 16, wherein part of oxygen and hydrogen are subjected to chemical reaction to generate electricity and water.

The valve 2 is an electric control three-way valve; the air inlet of the valve 2 is connected with the air filter 1 through a pipe; two air outlets of the valve 2 are respectively connected with an air inlet pipe 3 of the first-stage compressor of the group A and an air inlet pipe 8 of the first-stage compressor of the group B. The tail end of the air inlet pipe 3 of the A group of the first-stage compressor is connected with an air inlet of the A group of the first-stage compressor 4, and the tail end of the air inlet pipe 8 of the B group of the first-stage compressor is connected with an air inlet of the B group of the first-stage compressor 9. One end of the A group connecting air pipe 6 is connected with an air outlet of the A group primary compressor 4, and the other end is connected with an air inlet of the A group secondary compressor 7. One end of the B group connecting air pipe 11 is connected with an air outlet of the B group primary compressor 9, and the other end is connected with an air inlet of the B group secondary compressor 12. And the air outlet pipe 13 of the group A of secondary compressors and the air outlet pipe 14 of the group B of secondary compressors are converged and connected with an air inlet of an intercooler 15. An air outlet of the intercooler 15 is connected to an air inlet of the humidifier 16 through a pipe. The outlet of the humidifier 16 is connected to the inlet of the cathode 18 via a humidifier outlet 17. Hydrogen enters the fuel cell stack 19 through the inlet of the anode 20. The exhaust gas is exhausted to the atmosphere from the exhaust port of the cathode 18.

Example one

The utility model discloses the working process of the air compressor unit to open two sets of machine modes, start the machine, two gas outlets of the control system control valve 2 are opened; the first motor 5 is started, and because the output shaft of the first motor 5, the pinch roller of the A group of first-stage compressors 4 and the pinch roller of the A group of second-stage compressors 7 are coaxial, the A group of first-stage compressors 4 and the A group of second-stage compressors 7 work simultaneously; the second motor 10 is started, and the output shaft of the second motor 10, the pinch roller of the B group of first-stage compressors 9 and the pinch roller of the B group of second-stage compressors 12 are coaxial, so that the B group of first-stage compressors 9 and the B group of second-stage compressors 12 work simultaneously. Air enters the valve 2 after being filtered by the air filter 1 and respectively passes through two air outlets, one path of air enters the A-group one-stage compressor 4 through the A-group one-stage compressor air inlet pipe 3, and the other path of air enters the B-group one-stage compressor 9 through the B-group one-stage compressor air inlet pipe 8. The air compressed by the A group of first-stage compressors 4 enters the A group of second-stage compressors 7 through the A group of connecting air pipes 6, is recompressed and enters the A group of second-stage compressor air outlet pipes 13. The air compressed by the B group of first-stage compressors 9 enters the B group of second-stage compressors 12 through the B group of connecting air pipes 11, is recompressed and enters the B group of second-stage compressor air outlet pipes 14. Because the outlet pipe 13 of the group A of the two-stage compressors and the outlet pipe 14 of the group B of the two-stage compressors are converged and connected with the air inlet of the intercooler 15, namely, the air of the group A and the air of the group B are compressed in two stages respectively, then are converged in parallel, are cooled by the intercooler 15, are humidified by the humidifier 16 and enter the fuel cell stack 19 from the cathode 18, and oxygen in the compressed air and hydrogen entering from the anode 20 are subjected to electrochemical reaction. The exhaust gas is exhausted to the atmosphere from the exhaust port of the cathode 18.

Because the air compressor unit of the utility model realizes two-stage compression by opening two sets of machine modes, the pressure of the produced compressed air is larger; and because two groups of air compressed in two stages are connected in parallel, the flow of the produced compressed air is large.

Example two

The utility model discloses the working process of the air compressor unit opening a group of machine mode, start, the gas outlet of control system control valve 2 only communicates one, here exemplifies and only switches on this side of A group; the first motor 5 is started, the second motor 10 is not started, and the group A primary compressor 4 and the group A secondary compressor 7 work simultaneously because the output shaft of the first motor 5, the pinch roller of the group A primary compressor 4 and the pinch roller of the group A secondary compressor 7 are coaxial. Air is filtered by an air filter 1 and then enters a valve 2, enters a group A of primary compressors 4 through a group A of primary compressor air inlet pipes 3, and air compressed by the group A of primary compressors 4 enters a group A of secondary compressors 7 through a group A of connecting air pipes 6, is recompressed and enters a group A of secondary compressor air outlet pipes 13, is cooled by an intercooler 15, is humidified by a humidifier 16 and enters a fuel cell stack 19 from a cathode 18, and oxygen in the compressed air and hydrogen entering from an anode 20 are subjected to electrochemical reaction. The exhaust gas is exhausted to the atmosphere from the exhaust port of the cathode 18.

The start-up mode is suitable for the low-load working condition of the fuel cell stack.

The device of the utility model is suitable for a high-power fuel cell stack. The surge boundary under the low-speed working condition can be ensured to be wider, and the surge risk is lower.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. An air compressor unit for a hydrogen fuel cell is characterized by comprising an air filter, a valve, an A group of first-stage compressor air inlet pipes, an A group of first-stage compressors, a first motor, an A group of connecting air pipes, an A group of second-stage compressors, a B group of first-stage compressor air inlet pipes, a B group of first-stage compressors, a second motor, a B group of connecting air pipes, a B group of second-stage compressors, an A group of second-stage compressor air outlet pipes, a B group of second-stage compressor air outlet pipes, an intercooler, a humidifier and a humidifier air outlet pipe; one end of an output shaft of the first motor is connected with the pinch roller of the A group of primary compressors, and the other end of the output shaft of the first motor is connected with the pinch roller of the A group of secondary compressors; one end of an output shaft of the second motor is connected with the pinch roller of the B group of primary compressors, and the other end of the output shaft of the second motor is connected with the pinch roller of the B group of secondary compressors; the air compressed by the A group of first-stage compressors enters the A group of second-stage compressors, is compressed in the A group of second-stage compressors and enters the air outlet pipe of the A group of second-stage compressors; the air compressed by the B group of first-stage compressors enters the B group of second-stage compressors, is compressed in the B group of second-stage compressors and enters the B group of second-stage compressor air outlet pipes; the compressed air of the group A and the compressed air of the group B are converged, enter the intercooler for cooling, are humidified by the humidifier and enter the fuel cell stack, and part of oxygen and hydrogen are subjected to chemical reaction to generate electricity and water.

2. The air compressor set for a hydrogen fuel cell according to claim 1, wherein the valve is an electrically controlled three-way valve; and the air inlet of the valve is connected with the air filter through a pipe.

3. The air compressor set for hydrogen fuel cell according to claim 1, wherein there are two air outlets of said valves, respectively connected to the air inlet pipes of said group a primary compressor and said group B primary compressor.

4. The air compressor package for a hydrogen fuel cell according to claim 1, wherein an end of the group a primary compressor intake pipe is connected to an intake port of the group a primary compressor.

5. The air compressor set for a hydrogen fuel cell according to claim 1, wherein the end of the intake pipe of the group B primary compressor is connected to the intake port of the group B primary compressor.

6. The air compressor set for hydrogen fuel cell according to claim 1, wherein one end of said group a connecting air pipe is connected to the air outlet of said group a primary compressor, and the other end is connected to the air inlet of said group a secondary compressor.

7. The air compressor set for hydrogen fuel cell according to claim 1, wherein one end of the group B connecting air pipe is connected to the air outlet of the group B primary compressor, and the other end is connected to the air inlet of the group B secondary compressor.

8. The air compressor set for hydrogen fuel cell according to claim 1, wherein the outlet duct of the group a secondary compressor and the outlet duct of the group B secondary compressor are joined to connect with the inlet of the intercooler.

9. The air compressor assembly for a hydrogen fuel cell according to claim 1, wherein an air outlet of the intercooler is connected to an air inlet of the humidifier through a pipe.

10. The air compressor set for a hydrogen fuel cell according to claim 1, wherein an air outlet of the humidifier is connected to an air inlet of the cathode through an air outlet pipe of the humidifier.