Vehicle fuel cell water heat recycling system

Abstract

The invention relates to the technical field of fuel cells, and particularly discloses a vehicle fuel cell water heat recycling system, which comprises a gas-liquid separator, a fuel cell water heat recycling device, a fuel cell water heat recycling device, a fuel cell water heat recycling device and a fuel cell water heat recycling device, the water tank is communicated with the first outlet of the gas-liquid separator and is used for storing liquid water; the atomizer is communicated with the water tank and is used for atomizing the liquid water and cooling the brake; an inlet of the first three-way valve is communicated with a second outlet of the gas-liquid separator, and an outlet of the first three-way valve is used for outputting dry and hot air to demist and defrost window glass; a first inlet of the second three-way valve is communicated with a pipeline between the electric pile and the gas-liquid separator, and a second inlet of the second three-way valve is communicated with a pipeline between the gas-liquid separator and the first three-way valve; and a first inlet of the ejector communicates with an outlet of the second three-way valve, and a second inlet of the ejector is used for inputting external air. According to the invention, water heat can be efficiently recovered, and driving safety is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of fuel cells, and in particular to a water heat recovery and utilization system for a vehicle fuel cell. Background Art

[0002] A hydrogen fuel cell is a device that generates electricity through an electrochemical reaction between hydrogen and oxygen. A large amount of waste heat and water is generated during the reaction process. Therefore, improving the utilization of waste heat and water can improve the efficiency of fuel cells and further promote the development of fuel cells. The current system for utilizing waste heat from fuel cells cannot effectively recycle waste water, resulting in low recycling efficiency. It is also impossible to use recycled waste water to cool the brakes of a car. When the brakes overheat, there is a safety hazard. Summary of the invention

[0003] The purpose of the present invention is to provide a vehicle fuel cell water heat recovery system, which can efficiently recover water heat and ensure driving safety.

[0004] In order to achieve the above object, the present invention provides a vehicle fuel cell water heat recovery system, the fuel cell includes a stack, the outlet of the stack outputs hot and humid gas, the system includes:

[0005] A gas-liquid separator, the inlet of which is connected to the outlet of the fuel cell stack, and the gas-liquid separator is used to process the wet hot gas into liquid water and dry hot gas;

[0006] a water tank, connected to the first outlet of the gas-liquid separator, and used for storing liquid water;

[0007] an atomizer, connected to the water tank, for atomizing liquid water and cooling the brake;

[0008] a first three-way valve, the inlet of which is connected to the second outlet of the gas-liquid separator, and the outlet of the first three-way valve is used to output hot dry air to defog and defrost the vehicle window glass;

[0009] a second three-way valve, a first inlet of which is in communication with the pipeline between the fuel cell stack and the gas-liquid separator, and a second inlet of the second three-way valve is in communication with the pipeline between the gas-liquid separator and the first three-way valve; and

[0010] The first inlet of the ejector is connected to the outlet of the second three-way valve, the second inlet of the ejector is used to input external air, and the outlet of the ejector is used to input the mixed gas into the cab for temperature and humidity adjustment.

[0011] In some embodiments, a humidifier is further included, wherein a first outlet of the humidifier is connected to an inlet of the fuel cell stack, a second inlet of the humidifier is connected to an outlet of the fuel cell stack, and a second outlet of the humidifier is connected to an inlet of the gas-liquid separator.

[0012] In some embodiments, an air filter is further included, wherein an outlet of the air filter is in communication with the first inlet of the humidifier.

[0013] In some embodiments, an air compressor is further included, and the air compressor is installed on the pipeline between the air filter and the humidifier.

[0014] In some embodiments, an intercooler is further included, and the intercooler is installed on the pipeline between the air compressor and the humidifier.

[0015] In some embodiments, a pressure valve is further included, and the pressure valve is installed on the pipeline between the intercooler and the humidifier.

[0016] In some embodiments, a flow meter is further included, and the flow meter is installed on the pipeline between the air filter and the air compressor.

[0017] In some embodiments, a back-pressure valve is further included, and the back-pressure valve is installed on the pipeline between the second outlet of the humidifier and the inlet of the gas-liquid separator.

[0018] In some embodiments, the mixed gas includes moist hot gas and / or dry hot gas.

[0019] In some embodiments, the atomizer delivers atomized liquid water to the brake through a pipeline.

[0020] The present invention provides a vehicle fuel cell water heat recovery system, which has the following beneficial effects compared with the prior art:

[0021] The inlet of the gas-liquid separator is connected to the outlet of the stack, and the gas-liquid separator is used to process the moist hot gas into liquid water and dry hot gas. The inlet of the first three-way valve is connected to the second outlet of the gas-liquid separator, and the outlet of the first three-way valve is used to output dry hot air to defog and defrost the window glass. The water tank is connected to the first outlet of the gas-liquid separator and is used to store liquid water, so as to achieve efficient recovery of water heat. In addition, the atomizer is connected to the water tank and is used to atomize the liquid water and cool the brakes, so as to ensure driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the explosion structure of a vehicle fuel cell water heat recovery system provided in an embodiment of the present invention.

[0023] In the figure: 1. Gas-liquid separator; 2. Water tank; 3. Atomizer; 4. First three-way valve; 5. Second three-way valve; 6. Ejector; 7. Fuel stack; 8. Brake; 9. Humidifier; 10. Air filter; 11. Air compressor; 12. Intercooler; 13. Pressure valve; 14. Flow meter; 15. Back pressure valve. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0025] It should be understood that, in the description of the present application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, that is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0026] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1 As shown, the vehicle fuel cell water heat recovery system provided by the embodiment of the present invention comprises a fuel cell stack 7, and the outlet of the fuel cell stack 7 outputs humid hot gas. The system comprises a gas-liquid separator 1, a water tank 2, an atomizer 3, a first three-way valve 4, a second three-way valve 5 and an ejector 6. In the process of water heat recovery, the humid hot gas output by the fuel cell stack 7 is condensed and liquefied into liquid water and dry hot air through the gas-liquid separator 1, wherein the liquid water is stored in the water tank 2, and the dry hot air is regulated by the first three-way valve 4 and input to the window glass for defog and defrosting, and the mixed gas of dry hot air and humid hot air is regulated by the second three-way valve 5 and input to the cab through the ejector 6 to adjust the temperature and humidity of the cab. In addition. The water in the water tank 2 is atomized by the atomizer 3 and transported to the brake 8 to achieve the effect of cooling.

[0028] The inlet of the gas-liquid separator 1 is connected to the outlet of the fuel cell stack, and the gas-liquid separator 1 is used to process the wet hot gas into liquid water and dry hot gas. The obtained liquid water can be used as domestic water or for heat dissipation of the brake 8.

[0029] The water tank 2 is communicated with the first outlet of the gas-liquid separator 1 and is used for storing liquid water.

[0030] The atomizer 3 is connected to the water tank 2 and is used to atomize the liquid water and cool the brake 8. By atomizing the water, while lowering the temperature of the brake 8, a good braking effect is still guaranteed, making the car safer to drive.

[0031] The inlet of the first three-way valve 4 is connected to the second outlet of the gas-liquid separator 1 , and the outlet of the first three-way valve 4 is used to output hot dry air to defog and defrost the vehicle window glass. The first three-way valve 4 can control the flow rate of hot dry air discharged from the gas-liquid separator 1 .

[0032] The first inlet of the second three-way valve 5 is connected to the pipeline between the stack 7 and the gas-liquid separator 1, and the second inlet of the second three-way valve 5 is connected to the pipeline between the gas-liquid separator 1 and the first three-way valve 4. The second three-way valve 5 can adjust the mixing ratio between the dry hot gas and the wet hot gas.

[0033] The first inlet of the ejector 6 is connected to the outlet of the second three-way valve 5, the second inlet of the ejector 6 is used to input external air, and the outlet of the ejector 6 is used to input the mixed gas into the cab for temperature and humidity adjustment. Specifically, the temperature can be increased by increasing the proportion of dry hot gas, and the humidity can be increased by increasing the proportion of moist hot gas.

[0034] Based on the above structural setting, efficient water heat recovery is finally achieved and driving safety is guaranteed.

[0035] In one embodiment, the vehicle fuel cell water heat recovery system further includes a humidifier 9, a first outlet of the humidifier 9 is connected to the inlet of the battery stack 7, a second inlet of the humidifier 9 is connected to the outlet of the battery stack 7, and a second outlet of the humidifier 9 is connected to the inlet of the gas-liquid separator 1. The humidifier 9 can humidify the external air and input it into the battery stack 7, which can speed up the reaction speed of the battery stack 7. The humid hot air output by the battery stack further increases the humidity in the humidifier 9, which is beneficial to the subsequent gas-liquid separation.

[0036] In one embodiment, the vehicle fuel cell water heat recovery system further includes an air filter 10, and the outlet of the air filter 10 is connected to the first inlet of the humidifier 9. The air filter 10 can filter the external air to make the air input into the fuel cell stack 7 pure.

[0037] In one embodiment, the vehicle fuel cell water heat recovery system further includes an air compressor 11, which is installed on the pipeline between the air filter 10 and the humidifier 9. The air compressor 11 can pressurize the air input into the fuel cell stack 7.

[0038] In one embodiment, the vehicle fuel cell water heat recovery system further includes an intercooler 12, which is installed on the pipeline between the air compressor 11 and the humidifier 9. The intercooler 12 can cool the air input to the fuel cell stack 7.

[0039] In one embodiment, the vehicle fuel cell water heat recovery system further includes a pressure valve 13, which is installed on the pipeline between the intercooler 12 and the humidifier 9. The pressure valve 13 can adjust the pressure and flow of the air input into the fuel cell stack 7.

[0040] In one embodiment, the vehicle fuel cell water heat recovery system further includes a flow meter 14, which is installed on the pipeline between the air filter 10 and the air compressor 11. The flow meter 14 is used to measure the flow value of the air on the pipeline.

[0041] In one embodiment, the vehicle fuel cell water heat recovery system further includes a back pressure valve 15, which is installed on the pipeline between the second outlet of the humidifier 9 and the inlet of the gas-liquid separator 1. The back pressure valve 15 is used to adjust the flow rate of the gas output by the humidifier 9 and maintain a stable pressure.

[0042] Specifically, the mixed gas includes moist hot gas and / or dry hot gas. The more the moist hot gas accounts for, the higher the humidity is, and the more the dry hot gas accounts for, the higher the temperature is.

[0043] Exemplarily, the atomizer 3 delivers the atomized liquid water to the brake 8 through a pipeline. The atomized water can cool the brake 8, while lowering the temperature of the brake 8, still ensuring a good braking effect, making the car safer to drive.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A vehicle fuel cell water heat recovery system, the fuel cell comprising a stack, the stack outlet outputs hot and humid gas, characterized in that: include: A gas-liquid separator, the inlet of which is connected to the outlet of the fuel cell stack, and the gas-liquid separator is used to process the wet hot gas into liquid water and dry hot gas; a water tank, connected to the first outlet of the gas-liquid separator, and used for storing liquid water; an atomizer, connected to the water tank, for atomizing liquid water and cooling the brake; a first three-way valve, the inlet of which is connected to the second outlet of the gas-liquid separator, and the outlet of the first three-way valve is used to output hot dry air to defog and defrost the vehicle window glass; a second three-way valve, a first inlet of which is in communication with the pipeline between the fuel cell stack and the gas-liquid separator, and a second inlet of the second three-way valve is in communication with the pipeline between the gas-liquid separator and the first three-way valve; as well as The first inlet of the ejector is connected to the outlet of the second three-way valve, the second inlet of the ejector is used to input external air, and the outlet of the ejector is used to input the mixed gas into the cab for temperature and humidity adjustment.

2. The vehicle fuel cell water heat recovery system according to claim 1, characterized in that: It also includes a humidifier, wherein a first outlet of the humidifier is communicated with an inlet of the fuel cell stack, a second inlet of the humidifier is communicated with an outlet of the fuel cell stack, and a second outlet of the humidifier is communicated with an inlet of the gas-liquid separator.

3. The vehicle fuel cell water heat recovery system according to claim 2, characterized in that: An air filter is also included, wherein an outlet of the air filter is in communication with the first inlet of the humidifier.

4. The vehicle fuel cell water heat recovery system according to claim 3, characterized in that: It also includes an air compressor, which is installed on the pipeline between the air filter and the humidifier.

5. The vehicle fuel cell water heat recovery system according to claim 4, characterized in that: It also includes an intercooler, which is installed on the pipeline between the air compressor and the humidifier.

6. The vehicle fuel cell water heat recovery system according to claim 5, characterized in that: It also includes a pressure valve, which is installed on the pipeline between the intercooler and the humidifier.

7. The vehicle fuel cell water heat recovery system according to claim 4, characterized in that: It also includes a flow meter, which is installed on the pipeline between the air filter and the air compressor.

8. The vehicle fuel cell water heat recovery system according to claim 2, characterized in that: It also includes a back-pressure valve, which is installed on the pipeline between the second outlet of the humidifier and the inlet of the gas-liquid separator.

9. The vehicle fuel cell water heat recovery system according to claim 1, characterized in that: The mixed gas includes moist hot gas and / or dry hot gas.

10. The vehicle fuel cell water heat recovery system according to claim 1, characterized in that: The atomizer delivers atomized liquid water to the brake through a pipeline.

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