CN211000950U - Liquid feeding and draining device for fuel cell automobile - Google Patents

Abstract

The utility model belongs to new energy automobile field discloses a liquid feeding flowing back device for fuel cell car, include: the liquid storage tank is provided with a first air inlet, a first liquid discharge port and a liquid inlet for adding liquid into the liquid storage tank, the buffer tank is provided with a second air inlet, a gas discharge port and a second liquid discharge port, and the second air inlet is spaced from the bottom of the buffer tank; one end of the first pipeline is communicated with the air outlet on the buffer tank, and the other end of the first pipeline is communicated with the atmosphere; one end of the second pipeline is communicated with the first air inlet, and the other end of the second pipeline is communicated with the atmosphere; and the vacuum pump is arranged on the first pipeline and the second pipeline. The utility model discloses not only can discharge raffinate and evacuation in the fuel cell car waterway system completely, the liquid feeding is efficient, and prevents the damage of long-time idle running to the water pump.

Description

Liquid feeding and draining device for fuel cell automobile

Technical Field

The utility model belongs to the technical field of new energy automobile, in particular to a liquid feeding drain for fuel cell car.

Background

In the fuel cell system, a cooling system is an indispensable part. The cooling system of the fuel cell automobile has the following characteristics that firstly, the cooling system in the large fuel cell automobile has a complex arrangement structure and needs a large amount of cooling liquid, so that the filling time is long, and the air in a water channel system is difficult to completely exhaust; secondly, the fuel cell automobile has high requirement on the conductivity and needs deionized cooling liquid, if the cooling liquid in the system is not discharged completely and the automobile is not started for a long time, the oxidation of air in a high humidity environment can oxidize parts in a water system, ions are separated out, and the conductivity is increased; in addition, due to the high conductivity requirements of fuel cell vehicles, the frequency of periodic antifreeze fluid replacement is far higher than that of conventional vehicles.

At present, the liquid adding mode of the cooling liquid on the automobile mainly injects the cooling liquid into the expansion kettle in a manual mode, and utilizes a water pump in an automobile waterway system to circulate and gradually discharge air through the expansion kettle. The manual liquid adding mode is effective for a simple waterway system, but for a complex waterway system, air in the waterway system is difficult to be completely exhausted, and a water pump in the automobile waterway system rotates in an air state for a long time, so that the water pump is easily damaged.

Disclosure of Invention

The utility model aims at providing a liquid feeding flowing back device for fuel cell car not only can discharge raffinate and the evacuation in the waterway system completely, and the liquid feeding is efficient moreover, can not harm the water pump.

The utility model provides a technical scheme as follows:

in one aspect, a charge drain for a fuel cell vehicle is provided, comprising:

the liquid storage tank is provided with a first air inlet, a first liquid discharge port and a liquid inlet for filling liquid into the liquid storage tank, the buffer tank is provided with a second air inlet, an air discharge port and a second liquid discharge port, and the second air inlet is separated from the bottom of the buffer tank;

one end of the first pipeline is communicated with the air outlet on the buffer tank, and the other end of the first pipeline is communicated with the atmosphere;

one end of the second pipeline is communicated with the first air inlet, and the other end of the second pipeline is an air port communicated with the atmosphere;

a vacuum pump disposed on the first and second conduits;

when the second air inlet is connected with a liquid discharge end of a water path system on the fuel cell automobile, opening the first pipeline, pumping the residual cooling liquid in the water path system into the buffer tank through the first pipeline, and vacuumizing the water path system;

when the first liquid discharging port is connected with the liquid supplementing end of the water path system, the second pipeline is opened, the vacuum pump sucks air through an air port communicated with the atmosphere, the air flows through the second pipeline and is introduced into the liquid storage box through the first air inlet, and the introduced air compresses the cooling liquid in the liquid storage box to enable the cooling liquid to enter the water path system from the first liquid discharging port.

Further, the electronic control valve further comprises a first electronic valve, a second electronic valve, a third electronic valve and a fourth electronic valve;

one end of the first electronic valve is connected with a pipeline of an exhaust port of the buffer tank, and the other end of the first electronic valve is respectively connected with the vacuum pump and one end of the second electronic valve through pipelines;

the other end of the vacuum pump is respectively connected with one end of the third electronic valve and one end of the fourth electronic valve through pipelines;

the other end of the third electronic valve is connected with the first air inlet pipeline;

the other ends of the second electronic valve and the fourth electronic valve are communicated with the atmosphere;

when the second electronic valve and the third electronic valve are closed, the first electronic valve, the vacuum pump and the fourth electronic valve are opened to form the first pipeline;

when the first electronic valve and the fourth electronic valve are closed, the second electronic valve, the vacuum pump and the third electronic valve are opened to form the second pipeline.

Further, still include:

one end of the third pipeline is communicated with the liquid inlet of the liquid storage tank;

the water pump is arranged on the third pipeline;

a fifth electronic valve disposed on the third line;

and the flowmeter is arranged on the third pipeline and is positioned between the water pump and the fifth electronic valve.

Further, the device also comprises a quick joint;

the other end of the third pipeline is provided with the quick connector;

the first liquid discharging port and the second air inlet are respectively provided with the quick connectors.

Further, still include:

a sixth electronic valve provided on the first drain port;

a seventh electronic valve disposed on the second drain port.

Further, still include:

and the air pressure sensor is arranged in the buffer tank and used for detecting the air pressure in the buffer tank.

Further, still include:

and the liquid level sensor is arranged in the liquid storage tank and used for detecting the liquid level in the liquid storage tank.

Further, the first liquid discharge port is arranged at the bottom of the liquid storage tank, and the first air inlet is arranged at the top of the liquid storage tank;

the second liquid outlet is arranged at the bottom of the buffer tank, and the exhaust port on the buffer tank is arranged at the top of the buffer tank.

Through the utility model provides a pair of a liquid feeding drain for fuel cell car can bring following beneficial effect: the utility model discloses a liquid feeding flowing back device can realize extracting remaining liquid and air in fuel cell's the waterway system through first pipeline, vacuum pump and buffer tank, can realize carrying out the purpose of high-efficient fluid infusion to fuel cell car's waterway system through second pipeline, vacuum pump and liquid reserve tank, and then solve traditional liquid feeding time long, inefficiency, damage water pump, and the flowing back is not thorough, air humidity causes the ion greatly to appear the scheduling problem.

Drawings

The above features, technical features, advantages and implementations of a charge and drain device for a fuel cell vehicle will be further described in the following detailed description of preferred embodiments in a clearly understandable manner, with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an embodiment of a liquid feeding and draining device for a fuel cell vehicle according to the present invention;

fig. 2 is a schematic structural diagram of another embodiment of the liquid feeding and draining device for the fuel cell vehicle of the present invention;

FIG. 3 is a schematic structural diagram of a water channel system of a fuel cell vehicle and a liquid charging and discharging device during liquid discharging;

FIG. 4 is a schematic structural diagram of a water channel system of a fuel cell vehicle and a liquid charging and discharging device during charging;

fig. 5 is a schematic view showing an interface of a display screen of a liquid feeding and draining device for a fuel cell vehicle according to the present invention.

Description of the reference numerals

1. A body; 101. a first pipeline; 102. a second pipeline; 103. a third pipeline; 2. a liquid storage tank; 21. a first air inlet; 22. a first drain port; 23. a liquid inlet; 3. a buffer tank; 31. a second air inlet; 32. an exhaust port; 33. a second liquid discharge port; 4. a first electronic valve; 5. a second electronic valve; 6. a gas port; 7. a vacuum pump; 8. a fourth electronic valve; 9. a third electronic valve; 10. a controller; 11. a display screen; 111. a mode selection area; 112. a key operation area; 113. a display area; 12. a sixth electronic valve; 13. a seventh electronic valve; 14. an air pressure sensor; 15. a liquid level sensor; 16. a water pump; 17. a fifth electronic valve; 18. a flow meter; 19. a quick coupling; 20. an expansion kettle; 201. a liquid discharge end; 202. an exhaust end; 203. and (5) supplementing liquid.

Detailed Description

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

It should be further understood that the term "and/or" as used in this specification refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

The utility model discloses embodiment provides a liquid feeding flowing back device for fuel cell car, as shown in fig. 1 and 2, including box, first pipeline 101, second pipeline 102 and vacuum pump 7. The inner chamber of box is separated for liquid reserve tank 2 and buffer tank 3, and liquid reserve tank 2 and buffer tank 3 can be by food level plastics integrated into one piece, use the plastics material can reach the purpose that lightens weight and stop metal ion to appear.

The liquid storage tank 2 is provided with a first air inlet 21, a first liquid discharge port 22 and a liquid inlet 23 for charging the liquid storage tank 2. The first drain port 22 of the liquid storage tank 2 is arranged at the bottom of the liquid storage tank 2, and the first air inlet 21 on the liquid storage tank 2 is arranged at the top of the liquid storage tank 2.

Be equipped with second gas outlet 31 on buffer tank 3, gas vent 32 and second leakage fluid dram 33, second leakage fluid dram 33 on the buffer tank 3 sets up the bottom at buffer tank 3, gas vent 32 on the buffer tank 3 sets up the top at buffer tank 3, second gas outlet 31 on the buffer tank 3 has the distance with the bottom of buffer tank 3, second gas outlet 31 on the buffer tank 3 does not set up in the bottom of buffer tank 3, when taking the raffinate in the water route system on the fuel cell car out in buffer tank 3, can prevent that the coolant liquid in the buffer tank 3 from pouring into the water route system.

One end of the first pipeline 101 is communicated with the exhaust port 32 on the buffer tank 3, and the other end of the first pipeline 101 is communicated with the atmosphere; one end of the second pipeline 102 is communicated with the first air inlet 21 on the liquid storage tank 2, and the other end of the second pipeline 102 is provided with an air port 6 communicated with the atmosphere; a vacuum pump 7 is arranged on the first line 101 and said second line 102.

As shown in fig. 3, when the second air outlet 31 of the buffer tank 3 is connected to the drain 201 of the water channel system of the fuel cell vehicle, the exhaust 202 and the fluid infusion 203 of the water channel system of the fuel cell vehicle, which are connected to the expansion tank 20, are sealed and isolated, and then the first pipeline 101 is opened, the coolant remaining in the water channel system is pumped into the buffer tank 3 through the first pipeline 101, and the water channel system is evacuated. When air and residual liquid in a waterway system of a fuel cell automobile need to be extracted, the residual liquid in the waterway system can be extracted into the buffer tank 3 through the buffer tank 3, the first pipeline 101 and the vacuum pump 7 so as to achieve the purpose of completely discharging the residual liquid in the waterway system, the air is continuously extracted, the air in the waterway system can be extracted and discharged through the first pipeline 101 so as to enable the waterway system on the fuel cell automobile to reach a vacuum state, and when the automobile is not started for a long time, because the waterway system is in the vacuum state, parts such as a radiator, an intercooler and the like in the waterway system cannot be oxidized, and further ion precipitation of the parts is inhibited.

As shown in fig. 4, when the first drainage port 22 of the liquid storage tank 2 is connected to the fluid infusion end 203 of the water channel system, the second pipeline 102 is opened, and meanwhile, the air exhaust end 202 of the water channel system connected to the expansion tank 20 needs to be kept open, and air is introduced into the liquid storage tank 2 through the second pipeline 102, so that the coolant in the liquid storage tank 2 enters the water channel system from the first drainage port 22 of the liquid storage tank 2. The liquid storage tank 2 is internally stored with cooling liquid, when air is introduced into the liquid storage tank 2 through the second pipeline 102, the cooling liquid in the liquid storage tank 2 is discharged from the first liquid discharge port 22 on the liquid storage tank 2 under the pressure of the entering air and enters the waterway system, and liquid feeding to the waterway system is completed. Preferably, in the process of adding liquid into the waterway system, the second electronic valve 5 of the second pipeline 102 is controlled to be closed every preset time, the first electronic valve 4 of the first pipeline 101 is controlled to be opened, air is extracted from the waterway system of the fuel cell automobile through the first pipeline 101, the cooling liquid in the liquid storage tank 2 can be accelerated to be added into the waterway system, and efficient liquid supplementing is realized for the waterway system of the fuel cell automobile. Preferably, when carrying out the liquid feeding to waterway system, can place liquid feeding flowing back device in the highest place of car for under the effect of gravity, accelerate the liquid feeding to waterway system.

The utility model discloses a liquid feeding drain is external device, applicable in the filling of fuel cell car at maintenance in-process coolant liquid, through first pipeline, residual liquid and air in can realizing the water route system to fuel cell in can be extracted to vacuum pump and buffer tank, through the second pipeline, vacuum pump and liquid reserve tank can realize carrying out the purpose of high-efficient fluid infusion to the water route system of fuel cell car, and then solve traditional liquid feeding time long, inefficiency, damage water pump, and the flowing back is not thorough, air humidity causes the ion to appear the scheduling problem greatly.

In one embodiment, as shown in fig. 2, a vacuum pump 7 is provided on each of the first pipeline 101 and the second pipeline 102, and an electronic valve is provided on each of the first pipeline 101 and the second pipeline 102, so that the operation of the first pipeline 101 is controlled by the vacuum pump 7 and the electronic valve on the first pipeline 101, and the operation of the second pipeline 102 is controlled by the vacuum pump 7 and the electronic valve on the second pipeline 102.

In one embodiment, as shown in fig. 1, further comprises a first electronic valve 4, a second electronic valve 5, a third electronic valve 9, and a fourth electronic valve 8; one end of the first electronic valve 4 is connected with the exhaust port 32 of the buffer tank 3 through a pipeline, and the other end of the first electronic valve 4 is respectively connected with the vacuum pump 7 and one end of the second electronic valve 5 through a pipeline; the other end of the vacuum pump 7 is respectively connected with one end of a third electronic valve 9 and one end of a fourth electronic valve 8 through pipelines; the other end of the third electronic valve 9 is connected with a first air inlet 21 of the liquid storage tank 2 through a pipeline; the other ends of the second electronic valve 5 and the fourth electronic valve 8 are provided in communication with the atmosphere.

When the second electronic valve 5 and the third electronic valve 9 are closed, the first electronic valve 4, the vacuum pump 7 and the fourth electronic valve 8 are opened to form a first pipeline; when the first electronic valve 4 and the fourth electronic valve 8 are closed, the second electronic valve 5, the vacuum pump 7 and the third electronic valve 9 are opened to form a second pipeline.

In this embodiment, the first pipeline and the second pipeline share one vacuum pump, and the work of the first pipeline or the work of the second pipeline is realized by controlling the opening and closing of different electronic valves, so that only one vacuum pump needs to be arranged in the whole device, the cost can be reduced, and the volume of the liquid feeding and discharging device can be reduced.

Preferably, as shown in fig. 1, the liquid feeding and draining device further includes a machine body 1, and the liquid storage tank 2, the buffer tank 3, the first electronic valve 4, the second electronic valve 5, the third electronic valve 9, the fourth electronic valve 8 and the vacuum pump 7 are all disposed on the machine body 1 to form a whole, which is convenient for carrying, taking, placing, etc. of the whole device. The air port 6 is arranged on the machine body 1, and one end of the first pipeline and one end of the second pipeline communicated with the atmosphere are respectively arranged on the air port 6.

Preferably, the liquid feeding and draining device further comprises a controller 10, and the controller 10 is electrically connected with the first electronic valve 4, the second electronic valve 5, the third electronic valve 9, the fourth electronic valve 8 and the vacuum pump 7 respectively, and is used for controlling the opening and closing of the vacuum pump 7 and each electronic valve.

As shown in fig. 5, the liquid feeding and draining device further includes a display screen 11, the display screen 11 is connected to the controller 10, and a main interface of the display screen 11 is shown in the figure, and the main interface is provided with three parts, namely a mode selection area 111, a key operation area 112 and a display area 113. Through the utility model discloses an in-process that liquid feeding flowing back was carried out to waterway system on the fuel cell car to liquid feeding flowing back device can operate on display screen 11, like selection mode (give car flowing back vacuum mode, liquid reserve tank liquid feeding mode or give car liquid feeding mode), set for atmospheric pressure value, hydraulic pressure value etc..

As shown in fig. 1 and 3, when residual liquid discharge vacuum is performed in the water channel system of the fuel cell vehicle, the drain 201 of the water channel system of the vehicle is first opened to discharge most of the coolant in the water channel system, and the remaining part of the coolant remains in the water channel system. Then, the exhaust end 202 and the liquid supplementing end 203 connected with the expansion kettle 20 in the vehicle waterway system of the fuel cell vehicle are sealed and separated, the second air inlet 31 on the buffer tank 3 in the liquid adding and draining device of the embodiment is connected with the liquid draining end 201 in the waterway system, then the 'vehicle feeding and draining vacuum mode' is selected in the mode selection area 111, the air pressure value suitable for the vehicle type of the fuel cell vehicle is set through the key operation area 112, and the START key is pressed.

Be equipped with sixth electronic valve 12 on the first leakage fluid dram 22 of liquid reserve tank 2, be equipped with seventh electronic valve 13 on the second leakage fluid dram 33 of buffer tank 3, sixth electronic valve 12 and seventh electronic valve 13 can be opened automatically to controller 10 this moment, and the raffinate in liquid reserve tank 2 and the buffer tank 3 is automatic discharges through self leakage fluid dram. And then the sixth electronic valve 12, the seventh electronic valve 13 and the second electronic valve 5 are controlled to be closed, and the first electronic valve 4 and the fourth electronic valve 8 are opened. The air pressure in the buffer tank 3 is equal to the air pressure in the automobile waterway system, an air pressure sensor 14 is arranged in the buffer tank 3, the air pressure sensor 14 is electrically connected with the controller 10, and when the air pressure sensor 14 detects the set air pressure value of the air pressure high pressure in the buffer tank 3, the vacuum pump 7 is turned on for vacuumizing. The current air pressure value in the buffer tank 3 can be displayed on the display screen 11 in real time, the controller 10 can control the rotating speed of the vacuum pump 7 according to the current air pressure value, and the controller 10 automatically analyzes the residual time required by vacuumizing according to the current air pressure value and the information of the set air pressure value. Because buffer tank 3 is thin high type, and second air inlet 31 on the buffer tank 3 is higher than the minimum on the buffer tank 3, and the raffinate of taking out in the waterway system can not get into vacuum pump 7 through first electronic valve 4 because of the effect of gravity in buffer tank 3, avoids damaging vacuum pump 7. Preferably, a gas-liquid separator may be provided in the buffer tank 3, not only to prevent liquid from entering the vacuum pump 7, but also to reduce the volume of the buffer tank 3, i.e., to prevent liquid from entering the vacuum pump 7 when the volume of the buffer tank 3 is small.

As shown in fig. 1 and 4, when the liquid is added to the waterway system of the fuel cell automobile, firstly, the mode selection area 111 of the display screen 11 selects "liquid adding mode for automobile", and will the liquid adding and draining device of the utility model is arranged at the highest end of the automobile, the first liquid discharge port 22 on the liquid storage tank 2 is connected to the liquid supplementing port of the waterway system of the automobile, and the exhaust port 202 connected with the expansion kettle 20 in the waterway system of the automobile is kept in the open state. Then, the START key is pressed by setting the amount of priming required through the key operation area 112.

At this time, the controller 10 controls the second electronic valve 5, the third electronic valve 9, the vacuum pump 7 and the sixth electronic valve 12 to open, air in the atmosphere enters the liquid storage tank 2 through the air port 6, the second electronic valve 5, the vacuum pump 7 and the third electronic valve 9 in sequence under the action of the vacuum pump 7, and the entering air presses down liquid in the liquid storage tank 2, so that the cooling liquid in the liquid storage tank 2 enters the water channel system from the first liquid discharge port 22 on the liquid storage tank 2 and the liquid supplementing port on the water channel system. Meanwhile, the controller 10 closes the second electronic valve 5 at intervals and opens the first electronic valve 4, so that the vacuum pump 7 can intermittently pump air from the waterway system of the fuel cell vehicle, and the air in the waterway system of the vehicle is pumped while the waterway system of the vehicle is filled with liquid, thereby more quickly realizing the liquid filling progress.

The liquid feeding and draining device is located at the highest end of the fuel cell automobile, and due to the action of gravity, air in the waterway system is pumped while liquid is fed, so that liquid in the liquid storage tank 2 can rapidly enter the waterway system of the fuel cell automobile through the sixth electronic valve 12 and the first liquid discharging port 22 on the liquid storage tank 2, and efficient liquid supplementing is achieved for the waterway system of the fuel cell automobile.

Be provided with MIN line and level sensor 15 in the liquid reserve tank 2, when the liquid level that level sensor 15 detected reachd the MIN line, controller 10 controlled vacuum pump 7 stop work, and controlled sixth electronic valve 12 self-closing, accomplished the process to the fuel cell car waterway system liquid feeding. In the liquid adding process, the controller 10 automatically analyzes the remaining time required for liquid adding according to the liquid level information of the liquid storage tank 2, the current air pressure value and the set air pressure value.

In this embodiment, the controller 10 can automatically control the vacuum degree, the liquid feeding speed and the liquid feeding amount in the waterway system to finally reach the set values; the display screen 11, the air pressure sensor 14 and the liquid level sensor 15 are provided, so that the pressure and liquid level state in the waterway system can be measured in real time and displayed on the display area 113.

The controller 10 further comprises a data management module, and the models of various vehicle types and standard setting values thereof can be stored, so that automatic matching can be provided according to the vehicle type to be charged and discharged with liquid, or a user can conveniently and quickly select the model, and the efficiency is improved.

In one embodiment, as shown in fig. 1 and 2, the system further comprises a third pipeline 103, a water pump 16, a fifth electronic valve 17 and a flow meter 18, wherein one end of the third pipeline 103 is communicated with a liquid inlet 23 of the liquid storage tank 2; the water pump 16 is arranged on the third pipeline 103; the fifth electrovalve 17 is arranged on the third pipeline 103; a flow meter 18 is arranged on the third line 103 between the water pump 16 and the fifth electrovalve 17. The water pump 16, the fifth electronic valve 17 and the flow meter 18 are electrically connected to the controller 10, respectively.

One end of the third pipeline 103 is communicated with the liquid inlet 23 of the liquid storage tank 2, and the other end of the third pipeline 103 is used for being connected with an external water source so as to supplement cooling liquid into the liquid storage tank 2.

When replenishing the liquid storage tank 2, first, the "liquid storage tank replenishment mode" is selected in the mode selection area 111, the controller 10 controls the sixth electronic valve 12 to discharge the residual liquid in the liquid storage tank 2, and after the residual liquid in the liquid storage tank 2 is discharged, the sixth electronic valve 12 is closed. Then the liquid inlet 23 on the liquid storage tank 2 is connected with an external water source, the amount of liquid to be added is set through the key operation area 112 of the display screen 11, and the START key is pressed. At this time, the controller 10 will automatically open the fifth electronic valve 17 and the water pump 16, and the coolant enters the liquid storage tank 2 through the liquid inlet 23, the fifth electronic valve 17 and the water pump 16 in sequence under the action of the water pump 16. Reading liquid flow data through flowmeter 18, controller 10 control water pump 16's rotational speed controls the fluid infusion flow, is equipped with level sensor 15 in the liquid reserve tank 2, can acquire the liquid level in the liquid reserve tank 2 in real time, and when the liquid volume in the liquid reserve tank 2 reached the set capacity, water pump 16 can end work. The controller 10 automatically analyzes the required remaining time according to the operation information of the water pump 16, the current level value and the set level value by the controller 10.

In one embodiment, as shown in fig. 1 and 2, the end of the third conduit 103 not connected to the reservoir 2 is provided with a quick coupling 19. The first liquid discharge port 22 of the liquid storage tank 2 and the second air inlet 31 of the buffer tank 3 are respectively provided with a quick coupling 19. The quick connector 19 is arranged, so that the liquid feeding and draining device can be conveniently connected with a waterway system in different modes.

The liquid adding and discharging method for the liquid adding and discharging device of the fuel cell automobile in the embodiment comprises the following steps:

when the drainage of the waterway system of the fuel cell automobile is vacuumized, a second air inlet on the buffer tank is connected with the drainage end of the waterway system on the fuel cell automobile, and an exhaust end and a liquid supplementing end which are used for being connected with the expansion kettle in the waterway system are sealed and separated;

controlling the first pipeline to work, pumping residual cooling liquid in the water path system into the buffer tank, and discharging air in the water path system through the first pipeline to enable the water path system to reach a vacuum state;

when liquid is added to the waterway system, a first liquid discharge port on the liquid storage tank is connected with a liquid supplementing end of the waterway system, and an exhaust end in the waterway system, which is used for being connected with the expansion kettle, is kept in a connection state;

and controlling the second pipeline to work, introducing air into the liquid storage tank, and enabling the cooling liquid in the liquid storage tank to enter the waterway system from the first liquid discharge port on the liquid storage tank under the action of air pressure.

Specifically, when the waterway system of the fuel cell automobile is drained and vacuumized, the second air inlet on the buffer tank is connected with the drainage end of the waterway system on the fuel cell automobile, the exhaust end and the liquid supplementing end which are connected with the expansion kettle in the waterway system of the fuel cell automobile are sealed and separated, then the first pipeline is opened, and the residual cooling liquid in the waterway system is extracted into the buffer tank through the first pipeline and is vacuumized. When air and residual liquid in a waterway system of a fuel cell automobile need to be extracted, the residual liquid in the waterway system can be extracted into the buffer tank through the buffer tank, the first pipeline and the vacuum pump so as to achieve the purpose of completely discharging the residual liquid in the waterway system, the air is continuously extracted, the air in the waterway system can be extracted and discharged through the first pipeline so as to enable the waterway system on the fuel cell automobile to reach a vacuum state, and when the automobile is not started for a long time, because the waterway system is in the vacuum state, parts such as a radiator, an intercooler and the like in the waterway system cannot be oxidized, and further ion precipitation of the parts is inhibited.

When the waterway system is used for adding liquid, the second pipeline is opened when the first liquid discharge port on the liquid storage tank is connected with the liquid supplementing end of the waterway system, meanwhile, the exhaust end connected with the expansion kettle in the waterway system is required to be kept in an open state, air is introduced into the liquid storage tank through the second pipeline, and cooling liquid in the liquid storage tank enters the waterway system from the first liquid discharge port on the liquid storage tank. The storage has the coolant liquid in the liquid reserve tank, and when letting in the air in to the liquid reserve tank through the second pipeline, the coolant liquid in the liquid reserve tank is discharged and enters into waterway system from the first drain port on the liquid reserve tank under the pressure of the air that gets into, accomplishes the liquid feeding to waterway system. Preferably, in the process of adding liquid into the waterway system, the second electronic valve of the second pipeline is controlled to be closed every preset time, the first electronic valve of the first pipeline is controlled to be opened, air is extracted from the waterway system of the fuel cell automobile through the first pipeline, the cooling liquid in the liquid storage tank can be accelerated to be added into the waterway system, and efficient liquid supplementing is carried out on the waterway system of the fuel cell automobile. Preferably, when carrying out the liquid feeding to waterway system, can place liquid feeding flowing back device in the highest place of car for under the effect of gravity, accelerate the liquid feeding to waterway system.

Preferably, in the working process of the second pipeline, the second electronic valve of the second pipeline is controlled to be closed at preset time intervals, the first electronic valve of the first pipeline is controlled to be opened, and air is extracted from the water path system.

Specifically, liquid feeding drain is located the highest end of fuel cell car, because the action of gravity, extracts the air in the waterway system when the liquid feeding simultaneously to make the liquid in the liquid reserve tank can get into the waterway system of fuel cell car through the first drain port on the liquid reserve tank rapidly, realize carrying out high-efficient fluid infusion to fuel cell car waterway system.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A liquid adding and draining device for a fuel cell vehicle, comprising:

the liquid storage tank is provided with a first air inlet, a first liquid discharge port and a liquid inlet for filling liquid into the liquid storage tank, the buffer tank is provided with a second air inlet, an air discharge port and a second liquid discharge port, and the second air inlet is separated from the bottom of the buffer tank;

one end of the first pipeline is communicated with the air outlet on the buffer tank, and the other end of the first pipeline is communicated with the atmosphere;

one end of the second pipeline is communicated with the first air inlet, and the other end of the second pipeline is an air port communicated with the atmosphere;

a vacuum pump disposed on the first and second conduits;

when the second air inlet is connected with a liquid discharge end of a water path system on the fuel cell automobile, opening the first pipeline, pumping the residual cooling liquid in the water path system into the buffer tank through the first pipeline, and vacuumizing the water path system;

when the first liquid discharge port is connected with the liquid supplementing end of the waterway system, the second pipeline is opened, the vacuum pump sucks air through the air port communicated with the atmosphere, the air flows through the second pipeline and is introduced into the liquid storage box through the first air inlet, and the introduced air compresses the cooling liquid in the liquid storage box to enable the cooling liquid to enter the waterway system from the first liquid discharge port.

2. The liquid adding and draining device for the fuel cell automobile according to claim 1, further comprising a first electronic valve, a second electronic valve, a third electronic valve and a fourth electronic valve;

one end of the first electronic valve is connected with a pipeline of an exhaust port of the buffer tank, and the other end of the first electronic valve is respectively connected with the vacuum pump and one end of the second electronic valve through pipelines;

the other end of the vacuum pump is respectively connected with one end of the third electronic valve and one end of the fourth electronic valve through pipelines;

the other end of the third electronic valve is connected with the first air inlet pipeline;

the other ends of the second electronic valve and the fourth electronic valve are communicated with the atmosphere;

when the second electronic valve and the third electronic valve are closed, the first electronic valve, the vacuum pump and the fourth electronic valve are opened to form the first pipeline;

when the first electronic valve and the fourth electronic valve are closed, the second electronic valve, the vacuum pump and the third electronic valve are opened to form the second pipeline.

3. The charge drain for a fuel cell vehicle according to claim 1 or 2, further comprising:

one end of the third pipeline is communicated with the liquid inlet of the liquid storage tank;

the water pump is arranged on the third pipeline;

a fifth electronic valve disposed on the third line;

and the flowmeter is arranged on the third pipeline and is positioned between the water pump and the fifth electronic valve.

4. The charge drain for a fuel cell vehicle of claim 3, further comprising a quick connector;

the other end of the third pipeline is provided with the quick connector;

the first liquid discharging port and the second air inlet are respectively provided with the quick connectors.

5. The charge drain for a fuel cell vehicle of claim 1, further comprising:

a sixth electronic valve provided on the first drain port;

a seventh electronic valve disposed on the second drain port.

6. The charge drain for a fuel cell vehicle of claim 1, further comprising:

and the air pressure sensor is arranged in the buffer tank and used for detecting the air pressure in the buffer tank.

7. The charge drain for a fuel cell vehicle of claim 1, further comprising:

and the liquid level sensor is arranged in the liquid storage tank and used for detecting the liquid level in the liquid storage tank.

8. The liquid filling and draining device for fuel cell vehicles according to claim 1,

the first liquid discharge port is arranged at the bottom of the liquid storage tank, and the first air inlet is arranged at the top of the liquid storage tank;

the second liquid outlet is arranged at the bottom of the buffer tank, and the exhaust port on the buffer tank is arranged at the top of the buffer tank.

Images