A kind of self-bleeding fuel battery cooling system
Technical field
The utility model belongs to the Proton Exchange Membrane Fuel Cells technical field, relates in particular to the Proton Exchange Membrane Fuel Cells cooling water system.
Background technology
What the PEM fuel cell engine cooling water system of prior art, cooling water entered the radiator employing is the mode of low in and high out.The deficiencies in the prior art are: add in the water process evacuation time long and incomplete, the gas that exists in cooling system in running can't be discharged, air exhausting is not gone out can affect radiating effect, make in fuel cell pack the heat radiation of every joint inhomogeneous, cause local overheating, cause the membrane electrode dehydration, fuel battery performance is descended tight, can burn when heavy and puncture membrane electrode, thereby fuel cell pack can not be worked.
Summary of the invention
The purpose of this utility model is to provide a kind of self-bleeding fuel battery cooling system, realizes fast automatic exhaust.
The purpose of this utility model is achieved through the following technical solutions: a kind of self-bleeding fuel battery cooling system, comprise the water tank, cooling water pump, radiator and the pressure sensor that connect successively with pipeline, the outlet of radiator is connected with the cooling water inlet of fuel cell pack, the entrance of water tank is connected with the coolant outlet of fuel cell pack, it is characterized in that: described self-bleeding fuel battery cooling system also comprises automatic exhaust steam valve, and described automatic exhaust steam valve is connected on fuel cell pack coolant outlet and pipeline that water tank is connected.
A kind of self-bleeding fuel battery cooling system described in the utility model is more than is characterized in that described automatic exhaust steam valve is positioned at the fuel cell pack end face.
The course of work of the present utility model is: when cooling water flow during through automatic exhaust steam valve, the gas that contains in cooling water system can be along with the mobile top that is gathered in automatic exhaust steam valve of gas, along with gas is built up, pressure rise, when gas pressure during greater than cooling water system pressure, gas can make water surface decline in the automatic vent valve pocket, and floating drum descends with water level, and floating drum makes Exhaust Open; After gas drained, water level rose, and floating drum also rises thereupon, exhaust close.
The beneficial effects of the utility model are: need not external power, by the variation of gas pressure in valve, automatically discharge the gas in cooling system, can shorten evacuation time, make heat radiation evenly, during exhaust, cooling water can not overflow.
Description of drawings
The utility model has accompanying drawing 2 width, wherein:
Fig. 1 is self-bleeding fuel battery cooling system schematic diagram of the present utility model.
Fig. 2 is the fuel battery cooling system schematic diagram of prior art.
In figure: 1, fuel cell pack, 2, automatic exhaust steam valve, 3, water tank, 4, cooling water pump, 5, radiator, 6, pressure sensor.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
Self-bleeding fuel battery cooling system, comprise the automatic exhaust steam valve 2, water tank 3, water pump 4, radiator 6 and the pressure sensor 6 that connect successively with pipeline, the outlet of radiator 5 is connected with the cooling water inlet of fuel cell pack 1, the entrance of water tank 3 is connected with the coolant outlet of fuel cell pack 1, and automatic exhaust steam valve 2 is connected on fuel cell pack 1 coolant outlet and pipeline that water tank 3 is connected.More than automatic exhaust steam valve 6 is positioned at fuel cell pack 1 end face.
Use cooling system of the present utility model and do cooling test, the cooling system volume of test is 15L, when injecting cooling water for system, because some air of cooling system can't be discharged by water filling, institute adds can only inject 10L, therefore need to open the gas that cooling water pump 4 recirculated cooling waters exist with discharge and replenish cooling water, calculating the whole complete required time of moisturizing that is vented to, the water pressure invariableness that detects with pressure sensor 6 is for filling with the time.Whole process is: open water pump 4, cooling water is flowed through successively and is entered fuel cell pack 1, automatic exhaust steam valve 2, water tank 3, water pump 4, radiator 5 and pressure sensor 6, when cooling water flow during through automatic exhaust steam valve 2, the gas that contains in cooling water system can be along with the mobile top that is gathered in automatic exhaust steam valve 2 of gas, and in valve, gas is built up, pressure rise, when gas pressure during greater than system pressure, gas can make water surface decline in the chamber, and floating drum descends with water level, opens exhaust outlet; After gas drained, water level rose, and floating drum also rises thereupon, the autoshutdown exhaust outlet.Through 6 minutes, the constant pressure that detects was at 23kPa, and water is filled with, did not have cooling water to overflow in process
Under the same conditions, do the test for added water of the cooling system that automatic exhaust steam valve 2 is not set, constant pressure when 23kPa, 19 minutes consuming time.
The result of the test explanation the utlity model has significant effect.