Weeding, loosening, sowing and irrigation integrated hydrogen fuel cell agricultural tractor and method

Abstract

Disclosed is a hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation, including a hydrogen fuel cell power system and a control system. The hydrogen fuel cell power system includes a liquid hydrogen storage tank, a liquid hydrogen pump, a vaporizer, a cooling water tank, a hydrogen fuel cell, an engine, a water pump, an AC / DC converter and a DC / DC converter. The coldness of liquid hydrogen is used to cool the circulating water, and the heat of the circulating water vaporizes the liquid hydrogen, thereby realizing efficient energy utilization; the fuel cell product is used for irrigation, thereby realizing zero material discharge. The control system analyzes the data collected by the sensor through an algorithm to accurately control the amount of irrigation water; it realizes automatic driving in conjunction with the images transmitted by the camera; and it can control functions such as weeding, loosening and sowing at the same time. The present invention has the characteristics of high degree of modernization and multiple functions. It is pollution-free and carbon-free during use, and the water of the working product can be effectively utilized. It is flexible to use and has a wide range of application scenarios, which is in line with the development trend of agricultural production and energy utilization.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery, and in particular to a hydrogen fuel cell agricultural tractor and a method for weeding, loosening, sowing and irrigation. Background Art

[0002] Tractors are self-propelled power machines used to tow and drive operating machinery to complete various mobile operations. They need to be matched with various agricultural implements to complete the corresponding operations. At present, most of my country's tractors use traditional internal combustion engine power systems, using diesel or gasoline as fuel, which are inefficient, noisy, and have serious pollution emissions, which are not conducive to energy conservation, emission reduction and environmental protection. Electric tractors have obvious defects in actual agricultural applications, such as limited cruising range and long charging time. In recent years, hydrogen fuel cell vehicles have many advantages such as zero emissions, short hydrogen refueling time, low battery operating temperature, high power density, and high energy conversion efficiency, and have received widespread attention in the field of electric vehicles. At present, with the continuous expansion of agricultural production scale and the development and changes in agricultural forms, in order to further improve agricultural productivity, clean, efficient, easy-to-operate, high-power, long-range modern agricultural machinery shows good application prospects.

[0003] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention proposes an integrated hydrogen fuel cell agricultural tractor for weeding, loosening, sowing and irrigation, which uses hydrogen fuel cells as the power source of the tractor to improve the efficiency and endurance of the tractor; utilizing the high energy density of liquid hydrogen, liquid hydrogen can be used as fuel for hydrogen fuel cells after vaporization, and the cold energy during the vaporization process can be utilized by the water heat management system; through digital control and automatic driving technology, the weeding, loosening, sowing and irrigation functions are integrated into a design and control, which greatly improves the modernization level and equipment utilization efficiency of traditional tractors, improves industrial production efficiency, utilizes limited equipment to give full play to its functions, and maximizes economic benefits.

[0005] The purpose of the present invention is achieved through the following technical solutions: a hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation comprises:

[0006] Chassis,

[0007] A housing, which is carried on the chassis,

[0008] a carburetor disposed in the housing,

[0009] a liquid hydrogen storage tank, which is used to store liquid hydrogen and is arranged in the shell,

[0010] a liquid hydrogen pump, which connects the liquid hydrogen storage tank and the vaporizer to pump liquid hydrogen,

[0011] A hydrogen fuel cell directly converts the chemical energy in hydrogen and oxygen into electrical energy. The hydrogen fuel cell is arranged in a housing. A vaporizer is connected to the liquid hydrogen pump and the hydrogen inlet of the hydrogen fuel cell and converts liquid hydrogen into gaseous hydrogen.

[0012] a cooling water tank, which is arranged in the housing and connected to the hydrogen fuel cell and the vaporizer, and the vaporizer is connected to the cooling water tank and the cooling water outlet of the hydrogen fuel cell,

[0013] a water pump connecting the hydrogen fuel cell and the cooling water tank,

[0014] A DC / DC converter connected to the hydrogen fuel cell is used to convert the DC voltage of the hydrogen fuel cell into a constant DC voltage,

[0015] An AC / DC converter connected to the DC / DC converter or the hydrogen fuel cell to convert into alternating current,

[0016] The first and second retractors are connected to the chassis,

[0017] a weeder connected to the first telescopic device to telescopically weed,

[0018] a soil tiller connected to the second telescopic device to loosen the soil in a telescopic manner;

[0019] a water tank connected to and storing water from the hydrogen fuel cell, the water tank being supported on the chassis,

[0020] a seed box for storing seeds, wherein the seed box is supported on the chassis,

[0021] A first control valve controls the on / off of the seed box and the seed screener.

[0022] a seed screener connected to the seed box via a first control valve so as to be able to receive seeds from the seed box in an on-off manner;

[0023] The second control valve controls the on / off of the water tank and the nozzle. The opening of the second control valve can be controlled by using the data provided by the temperature sensor and the humidity sensor.

[0024] The spray head is connected to the water tank via the second control valve so as to spray in an on-off manner.

[0025] The hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation also includes:

[0026] an engine, which provides power for the tractor, the engine being arranged in the housing and connected to the hydrogen fuel cell and / or the DC / DC converter,

[0027] The front wheel set is a driven wheel, and the front wheel set is rotatably connected to the chassis.

[0028] The rear wheel set is a driving wheel, and the rear wheel set is rotatably connected to the chassis and the engine.

[0029] In the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation, a steering wheel is arranged in the housing and is transmission-connected to the rear wheel set to adjust the running direction.

[0030] Camera, which captures real-time traffic conditions,

[0031] A temperature sensor that measures the local ambient temperature to provide temperature data,

[0032] Humidity sensor, which measures the local ambient humidity to provide humidity data,

[0033] An operation panel is connected to the camera, the temperature sensor, the humidity sensor, the engine, the first and second control valves, the weeder, the tiller, the sprinkler head and the seed screener to control the start / stop, automatic / manual driving, weeding, tilling and sowing of the tractor.

[0034] In the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation, the liquid hydrogen storage tank and the liquid hydrogen pump are connected via a first pipeline, the liquid hydrogen pump and the vaporizer are connected via a second pipeline, the vaporizer and the hydrogen inlet of the hydrogen fuel cell are connected via a third pipeline to input hydrogen, the vaporizer and the cooling water outlet of the hydrogen fuel cell are connected via a fourth pipeline, the vaporizer and the cooling water tank are connected via a fifth pipeline, the cooling water tank and the water pump are connected via a sixth pipeline, and the water pump and the cooling water inlet of the hydrogen fuel cell are connected via a seventh pipeline.

[0035] In the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation, the liquid hydrogen in the liquid hydrogen storage tank reaches the liquid hydrogen pump through the first pipeline, reaches the vaporizer through the second pipeline in liquid form after being pressurized, vaporizes into gaseous hydrogen after absorbing heat from the hydrogen fuel cell, enters the hydrogen inlet of the hydrogen fuel cell through the third pipeline, and the water generated by the hydrogen fuel cell enters the water tank and the generated direct current is converted by the AC / DC converter and the DC / DC converter.

[0036] In the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation, the hydrogen fuel cell, the water pump, the vaporizer, the cooling water tank and the fourth, fifth, sixth and seventh pipelines constitute a water heat management circuit of the hydrogen fuel cell.

[0037] In the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation, the heat of the hydrogen fuel cell is taken away by the cooling water of the water heat management circuit. The cooling water after absorbing the heat enters the vaporizer through the fourth pipeline, and after being cooled by the cold energy from the liquid hydrogen, enters the cooling water tank through the fifth pipeline, and then enters the water pump through the sixth pipeline, and enters the cooling water inlet of the hydrogen fuel cell through the seventh pipeline.

[0038] The operation method of the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation includes:

[0039] After adjusting the starting position of the tractor, the first telescopic valve and the second telescopic valve are controlled by the operation panel to lower the weeder and the tiller.

[0040] The tractor is started, and sowing begins at the first sowing time. The second control valve controls the opening of the second valve to spray the required amount of water for the seeds according to the data provided by the temperature sensor and the humidity sensor until the sowing of the row of land is completed.

[0041] The camera transmits real-time road condition information to the operation panel to complete the steering and forward movement of the tractor until the sowing and irrigation of the entire land are completed.

[0042] In the operating method, if weeding is not required, the first telescopic valve is controlled to retract the weeder, and if loosening the soil is not required, the second telescopic valve is controlled to retract the tiller.

[0043] In the operating method, if sowing is not required, the first control valve is controlled to close the passage between the seed box and the seed screener; if irrigation is not required, the second control valve is controlled to close the passage between the water tank and the sprinkler.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] 1) High energy and material utilization. The present invention uses the coldness of liquid hydrogen to cool the circulating water of the hydrogen fuel cell water thermal management, and uses the heat of the circulating water to vaporize the liquid hydrogen, thereby achieving efficient energy utilization; the product water of the hydrogen fuel cell is stored for seed irrigation, thereby achieving zero material discharge.

[0046] 2) The equipment has a high degree of integration and rich functions. The present invention integrates the functions of weeding, loosening soil, sowing and watering, and can complete multiple farming tasks at one time, which is conducive to saving manpower and material costs.

[0047] 3) The system has a high degree of automation. The present invention has the functions of automatic driving, automatic sowing and automatic irrigation. By collecting environmental temperature and humidity data, the irrigation water volume is scientifically adjusted to accurately complete the sowing and irrigation work; the camera transmits real-time road condition information to the control system to complete the steering and forward movement of the tractor.

[0048] 4) Fuel occupies less space. Using liquid hydrogen as fuel has an energy density three times that of 35MPa high-pressure gas hydrogen, and occupies less space, making the device more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of illustrating the preferred embodiments and are not considered to be limitations of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings.

[0050] In the attached picture:

[0051] Figure 1 It is a structural schematic diagram of the hydrogen fuel cell agricultural tractor integrated with sowing and irrigation of the present invention;

[0052] Figure 2 It is a schematic diagram of the power and water-heat management cycle of the hydrogen fuel cell agricultural tractor with integrated sowing and irrigation of the present invention;

[0053] Among them, 1-steering wheel; 2-operation panel; 3-hydrogen fuel cell; 4-engine; 5-temperature sensor; 6-humidity sensor; 7-cooling water tank; 8-liquid hydrogen pump; 9-housing; 10-liquid hydrogen storage tank; 11-bottom plate; 12-first telescopic valve; 13-weeder; 14-vaporizer; 15-second telescopic valve; 16-earth turner; 17-AC / DC converter; 18-DC / DC converter; 19-front wheel group; 20-water pump; 21-rear wheel group; 22-first control valve; 23-seed screen; 24-nozzle; 25-second control valve; 26-water tank; 27-seed box; 28-first pipeline; 29-second pipeline; 30-third pipeline; 31-fourth pipeline; 32-fifth pipeline; 33-sixth pipeline; 34-seventh pipeline; 35-camera.

[0054] The present invention is further explained below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0055] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the specific embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0056] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the present invention, but the description is based on the general principles of the specification and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the attached claims.

[0057] To facilitate understanding of the embodiments of the present invention, further explanation will be given below by taking specific embodiments as examples in conjunction with the accompanying drawings, and each of the accompanying drawings does not constitute a limitation on the embodiments of the present invention.

[0058] For better understanding, in one embodiment, Figure 1 to Figure 2 As shown, the hydrogen fuel cell agricultural tractor with integrated weeding, soil loosening, seeding and irrigation includes:

[0059] Steering wheel 1, which controls the running direction of the tractor,

[0060] The operation panel 2 controls the start / stop, automatic / manual driving, sowing and other functions of the tractor.

[0061] The hydrogen fuel cell 3 directly converts the chemical energy in hydrogen and oxygen into electrical energy to supply power to the engine 4.

[0062] an engine 4, which provides power for the tractor,

[0063] Temperature sensor 5, which measures the local ambient temperature and provides temperature data for irrigation,

[0064] Humidity sensor 6, which measures the local ambient humidity and provides humidity data for irrigation,

[0065] The cooling water tank 7 is connected to the hydrogen fuel cell 3 and the vaporizer 14 and stores the cooled cooling water.

[0066] A liquid hydrogen pump 8 is connected to the liquid hydrogen storage tank 10 and the vaporizer 14 to provide power for the flow of liquid hydrogen in the liquid hydrogen storage tank 10.

[0067] The housing 9 encloses the power system consisting of the liquid hydrogen storage tank 10, the liquid hydrogen pump 8, the vaporizer 14, the cooling water tank 7, the hydrogen fuel cell 3, the engine 4, the water pump 20, the AC / DC converter 17 and the DC / DC converter 18,

[0068] Liquid hydrogen storage tank 10, which is used to store liquid hydrogen,

[0069] The chassis 11 protects the engine from collisions and serves as a support for the entire vehicle.

[0070] The first retractable device 12 is connected to the weed cutter 13 and can be retracted when the weed cutter 13 is not in use.

[0071] The weed remover 13 is connected to the first telescopic device 12 and can be used for weeding.

[0072] The vaporizer comprises two channels, one of which connects the cooling water tank 7 and the cooling water outlet of the hydrogen fuel cell 3, and the other connects the liquid hydrogen pump 8 and the hydrogen inlet of the hydrogen fuel cell 3. The residual heat of the cooling water of the hydrogen fuel cell is used to vaporize the liquid hydrogen and turn it into gaseous hydrogen, which is used as the fuel of the hydrogen fuel cell.

[0073] The second retractor 15 is connected to the soil tiller 16 and can be retracted when the soil tiller 16 is not needed.

[0074] The soil turning device 16 is connected to the second expansion joint 15 to loosen the soil.

[0075] The AC / DC converter 17 is used to convert alternating current and direct current to provide power for devices that require alternating current.

[0076] The DC / DC converter 18 is used to convert the DC voltage of the hydrogen fuel cell 3 into a constant 12V, 14V or 24V DC voltage, which can supply power to the entire vehicle electrical appliances and charge the auxiliary battery.

[0077] The front wheel set 19 is the driven wheel of the tractor.

[0078] A water pump 20 is connected to the hydrogen fuel cell 3 and the water tank 7 to provide flow power for the water in the water thermal management loop.

[0079] The rear wheel set 21 is the driving wheel of the tractor.

[0080] The first control valve 22 controls the on / off of the seed box 27 and the seed screen 23.

[0081] The seed screen 23 is connected to the first control valve 22, which is conducive to more uniform seed spreading during sowing.

[0082] The spray head 24 is connected by the second control valve 25, which is conducive to more uniform water spraying.

[0083] The second control valve 25 controls the on / off of the water tank 26 and the nozzle 24.

[0084] a water tank 26 for storing product water from the hydrogen fuel cell 3,

[0085] A seed box 27, which is used to store seeds,

[0086] The camera 35 captures the real-time road conditions and transmits them to the control system.

[0087] The hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation is characterized in that the hydrogen fuel cell 3, the water pump 20 and the vaporizer 14 constitute a fuel cell water and heat management circuit.

[0088] In the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation, the data provided by the temperature sensor 5 and the humidity sensor 6 can control the opening size of the second control valve through algorithm calculation.

[0089] In one example, the operating panel is connected to a control system that analyzes data collected by temperature and humidity sensors to precisely control the amount of water used for irrigation. It also uses images from a camera to achieve autonomous driving. It can also control functions such as weeding, loosening the soil, and sowing.

[0090] In the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation, the process flow of its power system is as follows:

[0091] The liquid hydrogen in the liquid hydrogen storage tank 10 reaches the liquid hydrogen pump 8 through the first pipeline 28 of the power system, and after being pressurized, it reaches the vaporizer 14 in liquid form through the second pipeline 29 of the power system, and vaporizes into gaseous hydrogen after absorbing heat from the hydrogen fuel cell water thermal management circuit, and enters the hydrogen fuel cell 3 through the third pipeline 30 of the power system. The generated direct current is converted by the AC / DC converter 17 and the DC / DC converter 18 to power the engine 4 and other equipment, and the water generated after reacting with oxygen enters the water tank 26.

[0092] In the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation, the process flow of the hydrogen fuel cell water and heat management cycle is as follows:

[0093] The heat of the hydrogen fuel cell 3 is taken away by the cooling water of the water heat management loop. The cooling water after absorbing the heat enters the vaporizer 14 through the fourth pipeline 31 of the power system, and after being cooled by the cold energy from the liquid hydrogen, enters the cooling water tank 7 through the fifth pipeline 32 of the power system, and then enters the water pump 20 through the sixth pipeline 33 of the power system. After obtaining energy, it enters the hydrogen fuel cell 3 through the seventh pipeline 34 of the power system.

[0094] A hydrogen fuel cell is a power generation device that converts the chemical energy of fuel directly into electrical energy. It only produces water and heat during operation and has many advantages such as cleanliness, high energy density, low noise, and high efficiency. Combined with the characteristics of high repetition and fixed processes in agricultural production, the multifunctional integrated agricultural hydrogen fuel cell tractor using automatic driving technology of the present invention promotes the modernization of the agricultural industry and improves the degree of agricultural mechanization and productivity.

[0095] The method for operating the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation includes:

[0096] After the driver has adjusted the starting position of the tractor, he controls the first telescopic valve 12 and the second telescopic valve 15 through the operation panel 2, puts down the weeder 13 and the tiller 16, sets the tractor forward speed and sowing time interval, and then starts the tractor, turns on the "autopilot" function, and presses the "start sowing" button at the first time when sowing is required. The second control valve 25 can control the valve opening size according to the data provided by the temperature sensor 5 and the humidity sensor 6 through algorithm calculation, and accurately sprays the amount of water required for the seeds until the sowing of the row of land is completed. The camera 35 transmits the real-time road condition information to the control system to complete the steering and advancement of the tractor until the sowing and irrigation of the entire land are completed.

[0097] In one embodiment, if the weeding function is not needed, the first telescopic valve 12 can be controlled to retract the weeder, if the loosening function is not needed, the second telescopic valve 15 can be controlled to retract the tiller, if the sowing function is not needed, the first control valve 22 can be controlled to close the passage between the seed box 27 and the seed screen 23, if the irrigation function is not needed, the second control valve 25 can be controlled to close the passage between the water tank 26 and the sprinkler 24. In one embodiment, the amount of water that can be saved by the tractor during operation is calculated as follows:

[0098] The power of a medium-sized agricultural tractor is generally 30-100 horsepower (22.1-73.5kW), and the power generation efficiency of a hydrogen fuel cell is 40-50%. The mass of water produced is calculated based on a 35kW medium-sized tractor and a fuel cell efficiency of 50%. The total power of a hydrogen fuel cell is

[0099]

[0100] It is known that the calorific value q of hydrogen is 1.4×10 5 kJ / kg, then the flow rate of hydrogen is G H2 for

[0101]

[0102] The amount of hydrogen consumed in one hour of operation is

[0103]

[0104] According to the chemical reaction formula

[0105] 2H 2 +O 2 =2H 2 O

[0106] Then the amount of water n is 0.9 mol, and its mass m is

[0107] m=n×M=0.9mol×18kg / mol=16.2kg

[0108] In summary, the tractor saves 16.2kg / h of water.

[0109] The energy saving calculation of the carburetor in the tractor is as follows:

[0110] The heat flow q required to vaporize liquid hydrogen at -253℃ into gas at 25℃ 1 for

[0111] q 1 =GΔh+c H2 GΔT H2

[0112] =0.0005kg / s×[450kJ / kg+13kJ / kg℃×(20+253)℃]=2kW

[0113] Where G is the mass flow rate of hydrogen, Δ9 is the latent heat of vaporization of liquid hydrogen, c H2 is the average constant-pressure specific heat capacity of hydrogen, ΔT H2 It is the temperature difference before and after the hydrogen heat exchange.

[0114] The heat flow rate q required to cool 80℃ water to 25℃ cooling water 2 for

[0115] q 2 =c w G w ΔT w

[0116] =4.2kJ / kg℃×0.01kg / s×(80-28)℃=2.184kW

[0117] Originally, additional energy was required to vaporize liquid hydrogen and cool circulating water. Now, the heat exchange between the two streams can be satisfied by setting up a heat exchanger between the streams. The results of designing the heat exchanger using ASPEN PLUS software are shown in the following table. Since the latent heat of evaporation of liquid hydrogen is small and the phase change in the heat exchanger is relatively complex, the hydrogen inlet temperature is taken as -250℃. This approximation has little effect on the final result. The specific parameters are shown in the following table.

[0118]

[0119] Although the embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments and application fields, and the above specific embodiments are only illustrative and instructive, rather than restrictive. A person of ordinary skill in the art can also make many forms under the guidance of this specification and without departing from the scope of protection of the claims of the present invention, all of which belong to the protection of the present invention.

Claims

1. A hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation, characterized in that: It includes: Chassis; A housing, which is carried on the chassis; a carburetor disposed in the housing; a liquid hydrogen storage tank, which is used to store liquid hydrogen and is disposed in the housing; a liquid hydrogen pump connected to the liquid hydrogen storage tank and the vaporizer to pump liquid hydrogen; A hydrogen fuel cell, which directly converts the chemical energy in hydrogen and oxygen into electrical energy. The hydrogen fuel cell is arranged in the housing. The vaporizer is connected to the liquid hydrogen pump and the hydrogen inlet of the hydrogen fuel cell and converts liquid hydrogen into gaseous hydrogen. A cooling water tank is disposed in the housing and connected to the hydrogen fuel cell and the vaporizer, and the vaporizer is connected to the cooling water tank and a cooling water outlet of the hydrogen fuel cell; A water pump connected to the hydrogen fuel cell and the cooling water tank; A DC / DC converter connected to the hydrogen fuel cell for converting the DC voltage of the hydrogen fuel cell into a constant DC voltage; An AC / DC converter connected to the DC / DC converter or the hydrogen fuel cell to convert into alternating current; First and second retractors connected to the chassis; a weeder connected to the first telescopic device to telescopically weed; A soil tiller connected to the second telescopic device to loosen the soil in a telescopic manner; a water tank connected to and storing water from the hydrogen fuel cell, the water tank being supported on the chassis; A seed box, which is used to store seeds, and the seed box is supported on the chassis; A first control valve, which controls the on and off of the seed box and the seed screener; A seed screener connected to the seed box via a first control valve so as to be able to receive seeds from the seed box in an on-off manner; The second control valve controls the on / off of the water tank and the nozzle. The opening of the second control valve can be controlled by using the data provided by the temperature sensor and the humidity sensor. The spray head is connected to the water tank via the second control valve so as to spray in an on-off manner.

2. The hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation according to claim 1, characterized in that: Also includes: An engine, which provides power for the tractor, the engine being disposed in the housing and connected to the hydrogen fuel cell and / or the DC / DC converter; A front wheel set, which is a driven wheel, and the front wheel set is rotatably connected to the chassis; The rear wheel set is a driving wheel, and the rear wheel set is rotatably connected to the chassis and the engine.

3. The hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation according to claim 2 is characterized in that: A steering wheel, which is arranged in the housing and is drivingly connected to the rear wheel set to adjust the running direction; A camera that captures real-time traffic conditions; A temperature sensor that measures the local ambient temperature to provide temperature data; A humidity sensor that measures the local ambient humidity to provide humidity data; An operation panel is connected to the camera, the temperature sensor, the humidity sensor, the engine, the first and second control valves, the weeder, the tiller, the sprinkler head and the seed screener to control the start / stop, automatic / manual driving, weeding, tilling and sowing of the tractor.

4. The hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation according to claim 1, characterized in that: The liquid hydrogen storage tank and the liquid hydrogen pump are connected via a first pipeline, the liquid hydrogen pump and the vaporizer are connected via a second pipeline, the vaporizer and the hydrogen inlet of the hydrogen fuel cell are connected via a third pipeline to input hydrogen, the vaporizer and the cooling water outlet of the hydrogen fuel cell are connected via a fourth pipeline, the vaporizer and the cooling water tank are connected via a fifth pipeline, the cooling water tank and the water pump are connected via a sixth pipeline, and the water pump and the cooling water inlet of the hydrogen fuel cell are connected via a seventh pipeline.

5. The hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation according to claim 4 is characterized in that: The liquid hydrogen in the liquid hydrogen storage tank reaches the liquid hydrogen pump through the first pipeline, reaches the vaporizer through the second pipeline after being pressurized, vaporizes into gaseous hydrogen after absorbing heat from the hydrogen fuel cell, and enters the hydrogen inlet of the hydrogen fuel cell through the third pipeline. The water generated by the hydrogen fuel cell enters the water tank, and the generated direct current is converted by the AC / DC converter and the DC / DC converter.

6. The hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation according to claim 4, characterized in that: The hydrogen fuel cell, the water pump, the vaporizer, the cooling water tank and the fourth, fifth, sixth and seventh pipelines constitute a water heat management loop of the hydrogen fuel cell.

7. The hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation according to claim 6 is characterized in that: The heat of the hydrogen fuel cell is taken away by the cooling water of the water heat management loop. The cooling water after absorbing the heat enters the vaporizer through the fourth pipeline, is cooled by the cold energy from the liquid hydrogen, enters the cooling water tank through the fifth pipeline, then enters the water pump through the sixth pipeline, and enters the cooling water inlet of the hydrogen fuel cell through the seventh pipeline.

8. The operating method of the hydrogen fuel cell agricultural tractor integrated with weeding, loosening, sowing and irrigation according to any one of claims 1 to 7, characterized in that: It includes: After adjusting the starting position of the tractor, the first telescopic device and the second telescopic device are controlled through the operation panel to lower the weeder and the tiller; The tractor is started to sow seeds at the first sowing time, and the second control valve controls the opening of the second valve to spray the required amount of water for the seeds according to the data provided by the temperature sensor and the humidity sensor until the sowing of the row of land is completed; The camera transmits real-time road condition information to the operation panel to complete the steering and forward movement of the tractor until the sowing and irrigation of the entire land are completed.

9. The operating method according to claim 8, characterized in that: If weeding is not needed, the first telescopic device is controlled to retract the weeder; if loosening the soil is not needed, the second telescopic device is controlled to retract the tiller.

10. The operating method according to claim 8, characterized in that: If sowing is not required, the first control valve is controlled to close the passage between the seed box and the seed screener; if irrigation is not required, the second control valve is controlled to close the passage between the water tank and the sprinkler.

Images