CN111301185A - Methanol-water hybrid electric vehicle - Google Patents

Abstract

The invention discloses a methanol-water hybrid vehicle, belonging to the technical field of hybrid vehicles, comprising a methanol-water reformer, a hydrogen fuel cell, a lithium battery, an electric motor, and an automobile running gear. connection, the motor is connected with the traveling mechanism of the automobile. The methanol water reformer includes a reforming reactor for supplying hydrogen to the hydrogen fuel cell and a fuel tank for supplying fuel to the reforming reactor. The fuel tank is connected with the reforming reactor through a pipeline, the reforming reactor is connected with the hydrogen fuel cell through a pipeline, and the hydrogen fuel cell is electrically connected with the charging circuit of the lithium battery, and provides charging for the lithium battery. The invention adopts lithium battery and hydrogen fuel cell as power source to drive motor, and adopts methanol water reformer to provide fuel for hydrogen fuel cell, thereby improving the sustainable driving mileage of hybrid electric vehicle and making up for the defect of insufficient capacity of lithium battery.

Description

A methanol-water hybrid vehicle

technical field

The invention relates to the technical field of hybrid vehicles, in particular to a methanol-water hybrid vehicle.

Background technique

With the consumption of fossil energy such as petroleum and coal, the concentration of _CO2 in the environment continues to rise, and the resulting greenhouse effect becomes more and more significant. Therefore, countries around the world are paying more and more attention to clean and renewable energy. Since hydrogen does not emit CO ₂ , NOx and other gases during the reaction, it is considered to be a clean energy in the future. Hydrogen can be produced from water electrolysis, fossil fuel reforming reactions, and the like. Although the hydrogen produced by electrolysis of water is of high purity, the production cost is high, the catalyst is expensive, and a large amount of electricity needs to be fed. Fossil energy reforming refers to a reaction in which hydrogen is generated by a heterogeneous reforming reaction using hydrogen stored therein. Compared with hydrogen production by electrolysis of water, hydrogen production from fossil energy reforming has the advantages of cheap catalyst, no need for electricity, and high hydrogen production rate.

In addition, gasoline vehicles use gasoline as a power source during driving, and at the same time emit COx, NOx, and pM2.5 particulate matter and other harmful gases and substances. Therefore, in order to reduce the pollution caused by gasoline vehicles to the environment, electric vehicles have developed rapidly. Electric vehicles use the electrical energy stored in lithium batteries to provide power to drive the car. Lithium battery vehicles have the advantage of zero pollution emissions, but the mileage is lower than gasoline vehicles. To overcome the shortcomings of electric vehicles, fuel cell vehicles were developed. Among them, hydrogen fuel cell vehicles use hydrogen as fuel, and the hydrogen is converted into electricity through fuel cells to provide energy for vehicles. Although hydrogen fuel cell vehicles do not emit harmful gases and have a longer mileage than lithium battery vehicles, hydrogen fuel cell vehicles need to be equipped with high-voltage hydrogen storage tanks. In order to increase the amount of hydrogen stored in the hydrogen storage tank as much as possible, the pressure setting is generally greater than 100MPa. This has high requirements for hydrogen storage filling materials, which virtually increases the cost of fuel cell vehicles. And, for hydrogen fuel cell vehicles, hydrogen refueling stations are very important. However, so far, the number of hydrogen refueling stations in domestic cities is still very few, and there are only a handful of cities with hydrogen refueling stations. Therefore, it is necessary to design more efficient electric vehicles to overcome the shortcomings and deficiencies of current electric vehicles and hydrogen fuel cell vehicles.

At present, domestic methanol production is in excess, so the price is cheap. In addition, methanol-water reforming hydrogen production technology is mature. With the same volume of methanol water and high-pressure hydrogen, the hydrogen obtained by methanol water through the reforming reaction is 4 times that of high-pressure hydrogen, which means that if methanol water is used as the fuel source of hydrogen fuel cells, it can increase the fuel volume under the condition of a certain fuel volume. The mileage of a hydrogen car. Based on the above considerations, the present invention proposes a novel hybrid vehicle. The hybrid vehicle does not consume gasoline, and the hybrid vehicle does not output _CO2 and other harmful gases and particles during driving. This contributes to the improvement of urban air quality. In addition, electric vehicles use lithium batteries as built-in power sources to provide power for electric vehicles through the charging and discharging of lithium batteries. Considering the limited capacity of lithium batteries, continuous charging is inevitable for long-running vehicles. However, the use of electric vehicles is limited on some routes that lack charging points. Therefore, the hybrid power system of the present invention also includes a methanol-water-hydrogen power system. The same point of the hybrid vehicle and the gasoline hybrid vehicle is that the mileage and driving range of the electric vehicle can be widened, and the difference is that the gasoline vehicle emits a large amount of CO ₂ during driving, and the engine and transmission of the gasoline hybrid vehicle There are still problems such as incoordination in the switching between the boxes, while the hybrid vehicle of the present invention uses the lithium battery as the direct power source, and there is no inconsistency in the mutual switching between the generator and the gearbox.

SUMMARY OF THE INVENTION

The invention provides a methanol-water hybrid vehicle, which solves the problem of short sustainable driving mileage of existing pure electric vehicles and gasoline-electric hybrid vehicles.

In order to solve the above-mentioned technical problems, the technical scheme of the present invention is:

A methanol-water hybrid vehicle, comprising a controller, a methanol-water reformer, a hydrogen fuel cell for converting the hydrogen produced by the methanol-water reformer into chemical energy, a lithium battery, an electric motor, and a vehicle running mechanism;

The methanol water reforming device is connected with the hydrogen fuel cell through pipelines, the hydrogen fuel cell and the lithium battery are respectively electrically connected with the electric motor, and the electric motor is connected with the traveling mechanism of the vehicle and provides power for the traveling mechanism of the vehicle;

The methanol-water reforming device includes a reforming reactor for supplying hydrogen for the hydrogen fuel cell, a fuel tank for supplying fuel to the reforming reactor, and a hydrogen purifier;

The fuel tank and the reforming reactor are connected through a pipeline, the reforming reactor and the hydrogen fuel cell are connected through a pipeline, and the hydrogen purifier is arranged on the pipeline between the reforming reactor and the hydrogen fuel cell;

The reforming reactor converts methanol water fuel into impurities such as H ₂ and a small amount of CO, and the hydrogen purifier further purifies and separates the generated H ₂ containing impurities into high-purity H ₂ . The hydrogen purified by the hydrogen purifier can be directly used as the feed gas of the fuel cell; the hydrogen generated by the reforming reactor is separated into high-purity hydrogen, and this part of the hydrogen first enters the buffer tank, and then enters the hydrogen fuel cell. Directly convert part of the chemical energy in the hydrogen into electrical energy, and the rest into thermal energy, which in a high-power battery will cause the fuel cell to generate heat;

The hydrogen fuel cell is electrically connected with the charging circuit of the lithium battery, and provides charging for the lithium battery; the controller is electrically connected with the hydrogen fuel cell, the lithium battery and the reforming reactor, and controls the hydrogen fuel cell and the lithium battery respectively. , fuel tank and reforming reactor work.

Among them, the above-mentioned hybrid power refers to the power source including the electric energy stored in the lithium battery and the electric energy obtained from the conversion of methanol water; the lithium battery and the electric motor can use the batteries and electric motors configured in the existing commercial electric vehicles or gasoline-electric hybrid vehicles. , so as to transform existing commercial vehicles and save manufacturing costs.

Preferably, the lithium battery is provided with two charging circuits, and the other charging circuit is electrically connected to an external charging interface charged by an external power source, and the lithium battery can be charged by a hydrogen fuel cell or an external power source.

Preferably, the fuel tank, the reforming reactor and the hydrogen fuel cell can be detachably arranged inside the vehicle body.

Preferably, an electric control switch is provided on the circuit connecting the hydrogen fuel cell and the lithium battery, the electric control switch is electrically connected with the control panel, and the opening and closing of the circuit is controlled by the control panel.

Preferably, the control panel is arranged inside the vehicle body, generally arranged in the cab, and is operated through the instrument in the driving of the vehicle.

Preferably, the reforming reactor includes a heat exchange system, a catalyst bed, a heating system and a hydrogen separation and purification system, and the heat exchange system, the catalyst bed and the hydrogen separation and purification system are connected in sequence; the reaction temperature of the reforming reactor is generally 300～400℃, the heat exchange system is used for the preheating of methanol water fuel, the high temperature hydrogen and methanol water fuel generated by the reaction flow into the heat exchange system respectively, and the high temperature hydrogen is cooled by heat exchange, thereby generating hydrogen with a temperature lower than 100℃ , the methanol water fuel is heated to form steam and enter the catalyst bed to react, and then continue to generate high-temperature hydrogen, which is input into the heat exchange system.

Preferably, the hydrogen fuel cell is provided with an external circuit for connecting with an external electrical device, and the external electrical appliance or battery can be charged through the external circuit, and the methanol water reformer is provided with an external gas supply pipe for connecting with the external device High-purity hydrogen can be supplied to external devices through an external gas supply pipeline.

Preferably, the hydrogen fuel cell is provided with a heat dissipation device, so as to dissipate the heat generated by the hydrogen fuel cell and prevent the temperature of the hydrogen fuel cell from being too high, and the heat dissipation device adopts air cooling or water cooling.

The above-mentioned pipelines are all provided with electronically controlled valves that are electrically connected to the controller, and the opening and closing of different electronically controlled valves are controlled by the controller.

By adopting the above technical solution, by using lithium batteries and hydrogen fuel cells as power sources to drive motors, and using methanol-water reformer to provide fuel for hydrogen fuel cells, the sustainable driving range of hybrid electric vehicles is improved and the capacity of lithium batteries is insufficient. defect.

Description of drawings

Fig. 1 is the connection schematic diagram of the embodiment of the present invention;

FIG. 2 is a schematic diagram of a component setting position according to an embodiment of the present invention;

3 is a schematic structural diagram of a reforming reactor in an embodiment of the present invention.

In the figure, 10, lithium battery, 20, hydrogen fuel cell, 21, external circuit, 30, reforming reactor, 31, external gas supply pipeline, 40, fuel tank, 50, controller.

Detailed ways

The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help the understanding of the present invention, but do not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in Figures 1-3, a methanol-water hybrid vehicle provided by the present invention includes a controller 50, a methanol-water reformer, and a hydrogen fuel for converting the hydrogen produced by the methanol-water reformer into chemical energy. battery 20, lithium battery 10, electric motor and vehicle running gear;

The methanol water reformer is connected with the hydrogen fuel cell 20 through pipelines, the hydrogen fuel cell 20 and the lithium battery 10 are respectively electrically connected with the electric motor, and the electric motor is connected with the traveling mechanism of the automobile in a transmission connection, and provides power for the traveling mechanism of the automobile;

The methanol water reformer includes a reforming reactor 30 for supplying hydrogen to the hydrogen fuel cell 20, a fuel tank 40 for supplying fuel to the reforming reactor 30, and a hydrogen purifier;

The fuel tank 40 is connected with the reforming reactor 30 through a pipeline, the reforming reactor 30 is connected with the hydrogen fuel cell 20 through a pipeline, and the hydrogen purifier is arranged on the pipeline between the reforming reactor 30 and the hydrogen fuel cell 20;

The reforming reactor 30 converts the methanol water fuel into impurities such as H ₂ and a small amount of CO, and the hydrogen purifier further purifies and separates the generated H ₂ of the impurity-containing gas into high-purity H ₂ . The hydrogen purified by the hydrogen purifier can be directly used as the raw material gas of the fuel cell; the hydrogen generated by the reforming reactor 30 is separated into high-purity hydrogen, and this part of the hydrogen first enters the buffer tank, and then enters the hydrogen fuel cell 20. The fuel cell 20 directly converts part of the chemical energy in the hydrogen into electrical energy, and the rest into thermal energy, and the thermal energy in the high-power battery will make the fuel cell generate heat;

The hydrogen fuel cell 20 is electrically connected to the charging circuit of the lithium battery 10 and provides charging for the lithium battery 10; the controller 50 is electrically connected to the hydrogen fuel cell 20, the lithium battery 10 and the reforming reactor 30, and controls the hydrogen fuel cell 20, the lithium battery 10 and the reforming reactor 30 respectively. Operation of the fuel cell 20 , the lithium battery 10 , the fuel tank 40 and the reforming reactor 30 .

Among them, the above-mentioned hybrid power refers to the power source including the electric energy stored in the lithium battery 10 and the electric energy obtained by converting methanol water; the lithium battery 10 and the electric motor can both use the batteries configured in the existing commercial electric vehicles or gasoline-electric hybrid vehicles. And electric motor, so as to retrofit existing commercial vehicles and save manufacturing costs.

Further, the lithium battery 10 is provided with two charging circuits, and the other charging circuit is electrically connected to an external charging interface charged by an external power source. The lithium battery 10 can be charged by a hydrogen fuel cell 20 or an external power source.

Further, the fuel tank 40, the reforming reactor 30, and the hydrogen fuel cell 20 can all be detachably arranged inside the vehicle body.

Further, an electric control switch is provided on the circuit connecting the hydrogen fuel cell 20 and the lithium battery 10, the electric control switch is electrically connected with the control panel, and the opening and closing of the circuit is controlled by the control panel.

Further, the control panel is arranged inside the vehicle body, generally arranged in the cab, and is operated through the instrument in the driving of the vehicle.

Further, the reforming reactor 30 includes a heat exchange system, a catalyst bed, a heating system and a hydrogen separation and purification system, and the heat exchange system, the catalyst bed and the hydrogen separation and purification system are connected in sequence; the reaction temperature of the reforming reactor 30 is generally 300～400℃, the heat exchange system is used for the preheating of methanol water fuel, the high temperature hydrogen and methanol water fuel generated by the reaction flow into the heat exchange system respectively, and the high temperature hydrogen is cooled by heat exchange, thereby generating hydrogen with a temperature lower than 100℃ , the methanol water fuel is heated to form steam and enter the catalyst bed to react, and then continue to generate high-temperature hydrogen, which is input into the heat exchange system.

Further, the hydrogen fuel cell 20 is provided with an external circuit 21 for connecting with an external electrical device, and the external electrical appliance or battery can be charged through the external circuit 21, and the methanol water reformer is provided with an external gas supply pipeline for connecting with an external device. 31. High-purity hydrogen can be supplied to an external device through an external gas supply pipeline 31.

Further, the hydrogen fuel cell 20 is provided with a heat dissipation device, so as to dissipate the heat generated by the hydrogen fuel cell 20 to prevent the temperature of the hydrogen fuel cell 20 from being too high, and the heat dissipation device adopts air cooling or water cooling.

The above-mentioned pipelines are all provided with electronically controlled valves that are electrically connected to the controller 50 , and the opening and closing of different electronically controlled valves is controlled by the controller 50 .

The working principle is:

The fuel tank 40 provides methanol-water fuel to the reforming reactor 30 through a pipeline, and the methanol-water fuel reacts in the reforming reactor 30 to generate hydrogen, and the generated hydrogen enters the hydrogen fuel cell 20 through the pipeline, and the hydrogen reacts in the hydrogen fuel cell 20 The chemical energy is converted into electrical energy, and the product water is generated at the same time, and the hydrogen fuel cell 20 charges the lithium battery 10 through the line. The fuel tank 40 delivers fuel to the reforming reactor 30 , the reforming reactor 30 delivers hydrogen to the hydrogen fuel cell 20 , and the charging of the hydrogen fuel cell 20 to the lithium battery 10 is monitored and controlled by the controller 50 . The fuel tank 40, the reforming reactor 30, the hydrogen fuel cell 20 and the controller 50 constitute the methanol-water-hydrogen power system of the hybrid vehicle. When the methanol-water-hydrogen power system is started, the controller 50 first turns on the reforming reactor 30 through the control circuit for reforming hydrogen production. When the catalyst bed in the reforming reactor 30 reaches the optimum reaction temperature, the controller 50 sends a signal to the fuel tank 40 through the control circuit to start the motor and open the electrical control on the pipeline between the fuel tank 40 and the reforming reactor 30 Valve, the fuel tank 40 delivers methanol water fuel to the reforming reactor 30 . When the fuel tank 40 delivers fuel to the reforming reactor 30 , it should be ensured that there is sufficient fuel in the fuel tank 40 to ensure that methanol water can be continuously delivered to the reforming reactor 30 . In order to ensure the fuel supply of the fuel tank 40, a liquid level sensor (not marked) is arranged in the fuel tank 40. When the methanol water in the fuel tank 40 is lower than the warning line, the sensor transmits a signal to the controller 50, and the controller 50 sends out a signal. Signal to refill methanol water fuel. If the methanol water in the fuel tank 40 is lower than the warning line, and the reforming reactor 30 is in a standby state, the controller 50 will remind to add fuel and refuse to start the reforming reactor 30 .

The methanol-water fuel reacts in the reforming reactor 30 to first produce lower purity hydrogen, which includes CO and CO ₂ . The hydrogen with lower purity is filtered into high-purity hydrogen (99.99%) through the palladium membrane filter in the reforming reactor 30, and a part of the hydrogen is shunted for the combustion exotherm of the heater of the heating system in the reforming reactor 30, The heat released by the heater is used to heat the catalyst bed in the reforming reactor 30 . Another part of high-purity hydrogen is firstly lowered to about 60° C. through the heat exchange device of the heat exchange system, and then sent to the hydrogen fuel cell 20 through pipelines. The hydrogen fuel cell 20 starts the warm-up after the controller 50 sends the starting warm-up signal to the reforming reactor 30 . The signal for starting the hydrogen fuel cell 20 is sent by the controller 50 through the control circuit. The hydrogen fuel cell 20 oxidizes high-purity hydrogen to H+ at the anode, reduces the oxygen in the air to O2- at the cathode, and at the same time there is current flowing through the line. The current generated in the hydrogen fuel cell 20 can charge the lithium battery 10 . Since the hydrogen fuel cell 20 emits a lot of heat during the working process, it is equipped with a heat sink (not marked), which is not marked, to prevent the hydrogen fuel cell 20 from being overheated during the reaction.

The electricity generated by the hydrogen fuel cell 20 charges the lithium battery 10 through the circuit, and this process is monitored and completed by the controller 50 . When the power in the lithium battery 10 is about to be exhausted, the controller 50 monitors the signal from the lithium battery 10 to automatically start the methanol-water-hydrogen power system, and converts the hydrogen stored in the methanol-water through the reforming reactor 30 and the hydrogen fuel cell 20 step by step. For hydrogen and electricity, and to charge the lithium battery 10 . When the power in the lithium battery 10 is in a full or sufficient state, the controller 50 does not automatically send a start signal to the methanol-water-hydrogen power system. However, the methanol-water-hydrogen power system may be additionally provided with an external circuit 21 and an external charging connection line, which can be charged to an external device, generally a battery or a lithium battery 10 . In this case, the methanol water hydrogen power system cannot charge the lithium battery 10 .

In addition to supplying high-purity hydrogen to the hydrogen fuel cell 20, the reforming reactor 30 in the methanol-water-hydrogen power system can also supply high-purity hydrogen to other devices or equipment through the external gas supply pipeline 31, such as the hydrogen fuel cell 20 or the combustion device. , thereby further expanding the functions of methanol-water hybrid vehicles. When the reforming reactor 30 supplies hydrogen to the outside, it should be ensured that the methanol water power system does not charge the lithium battery 10 , that is, the lithium battery 10 should be in a fully charged state at this time. The instruction to supply hydrogen from the reforming reactor 30 to the outside is still issued from the controller 50. At this time, a notification to start the reforming reactor 30 preheating and the fuel tank 40 to deliver methanol water fuel is issued through the operation screen or buttons on the controller 50. After the controller 50 activates the hydrogen production function, the reforming reactor 30 starts to work, and the heater therein heats the catalyst reaction bed temperature to the reaction temperature under the combined action of the heating couple and the hydrogen combustion exotherm. When the temperature of the catalyst bed reaches the reaction temperature, the controller 50 automatically starts the motor to deliver the fuel in the fuel tank 40 to the reforming reactor 30 . The reforming reactor 30 sends the prepared high-purity hydrogen to the outside through the external gas supply pipeline 31 , but does not send the hydrogen to the hydrogen fuel cell 20 . The hydrogen fuel cell 20 is in a standby or off state, and the pipeline connecting the reforming reactor 30 and the hydrogen fuel cell 20 is in a closed state.

Figure 2 shows the power structure of a methanol-water hybrid vehicle designed and transformed according to the above scheme. As shown in FIG. 2 , the lithium battery 10 of the automobile is placed at the front of the automobile, close to the steering wheel of the automobile. The controller 50 is also located at the front of the vehicle with its control panel or buttons located at the steering wheel position (not marked). The hydrogen fuel cell 20, the reforming reactor 30 and the fuel tank 40 are located at the rear of the vehicle, and the arrangement is as follows: the fuel tank 40, the reforming reactor 30 and the hydrogen fuel cell 20 are stacked from bottom to top, so as to reduce the amount of time spent in the vehicle. occupied space. The external circuit 21 of the hydrogen fuel cell 20 and the external gas supply pipeline 31 of the reforming reactor 30 do not need to be additionally opened in the car, and can be directly drawn from the interior of the car, such as the door or trunk, thereby saving the cost and cost of the transformation of the car.

FIG. 3 discloses a structure of the reforming reactor 30, and reference may be made to the invention patent with the application number of 201910722116.9. The reforming reactor 30 is composed of a combustion chamber, a reforming chamber, a purification chamber, and the like. The methanol-water fuel enters the preheating base and the coils (not marked) in the reforming chamber from the two water inlet pipes, respectively, to be gasified into gas, and then enter the reaction tubes in the reforming chamber to generate hydrogen with lower purity. The lower-purity hydrogen enters the purification chamber to generate high-purity hydrogen (99.99%), of which a part of the hydrogen is returned to the combustion chamber (providing fuel for the combustion chamber), and the other part of the gas enters the methanation reactor to further convert the trace amount of CO or CO ₂ is converted into CH ₄ and then passed to the hydrogen fuel cell 20 .

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions and alterations to these embodiments still fall within the protection scope of the present invention.

Claims (8)

1. The utility model provides a methanol-water hybrid vehicle which characterized in that: comprises a methanol water reforming device, a hydrogen fuel cell (20), a lithium battery (10), a motor and an automobile travelling mechanism;

the hydrogen fuel cell (20) and the lithium battery (10) are respectively electrically connected with a motor, and the motor is in transmission connection with the automobile travelling mechanism and provides power for the automobile travelling mechanism;

the methanol-water reforming apparatus includes a reforming reactor (30) for supplying hydrogen gas to a hydrogen fuel cell (20), a fuel tank (40) for supplying fuel to the reforming reactor (30);

the fuel tank (40) is connected with the reforming reactor (30) through a pipeline, and the reforming reactor (30) is connected with the hydrogen fuel cell (20) through a pipeline;

the hydrogen fuel cell (20) is electrically connected with a charging circuit of the lithium battery (10) and provides charging for the lithium battery (10).

2. The methanol-water hybrid vehicle according to claim 1, characterized in that: lithium cell (10) are provided with two way charging lines, another way charging line and the outside interface electric connection that charges through external power source.

3. The methanol-water hybrid vehicle according to claim 1, characterized in that: the fuel tank (40), the reforming reactor (30) and the hydrogen fuel cell (20) are detachably arranged in the vehicle body.

4. The methanol-water hybrid vehicle according to claim 1, characterized in that: an electric control switch is arranged on a circuit connecting the hydrogen fuel cell (20) and the lithium battery (10), and the electric control switch is electrically connected with the control panel and controls the opening and closing of the circuit through the control panel.

5. The methanol-water hybrid vehicle according to claim 4, characterized in that: the control panel is disposed inside the vehicle body and is operated by instruments within the vehicle driving.

6. The methanol-water hybrid vehicle according to claim 1, characterized in that: the reforming reactor (30) comprises a heat exchange system, a catalyst bed layer, a heating system and a hydrogen separation and purification system, wherein the heat exchange system, the catalyst bed layer and the hydrogen separation and purification system are sequentially connected.

7. The methanol-water hybrid vehicle according to claim 1, characterized in that: the hydrogen fuel cell (20) is provided with an external line (21) for connecting with an external power consumption device, and the methanol-water reforming device is provided with an external air supply line (31) for connecting with an external device.

8. The methanol-water hybrid vehicle according to claim 1, characterized in that: the hydrogen fuel cell (20) is provided with a heat dissipation device, and the heat dissipation device adopts air cooling or water cooling.

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