Electric agricultural machine cooling system

Abstract

The invention discloses an electric agricultural machine cooling system which comprises a first storage area, a first circulation loop, a heat dissipation module and a second circulation loop. The first storage area is used for storing cooling liquid; the first circulation loop is communicated with the fuel engine and the first storage area, so that cooling liquid in the first storage area can circularly flow between the fuel engine and the first storage area; the heat dissipation module is used for cooling the cooling liquid; the second circulation loop is communicated with the fuel engine and the heat dissipation module, so that cooling liquid can circularly flow between the fuel engine and the heat dissipation module; and cooling liquid can selectively flow in the first circulation loop or the second circulation loop. The cooling system of the electric agricultural machine is suitable for the electric agricultural machine, and operation of the electric agricultural machine is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a cooling system for an electric agricultural machinery. Background Art

[0002] In order to improve efficiency, agricultural machinery is widely used in agricultural production. Existing agricultural machinery mainly obtains energy by burning fuels such as diesel and gasoline. Such fuel agricultural machinery will emit a large amount of exhaust gas and other pollutants during operation, causing damage to the environment.

[0003] Agricultural machinery driven by electricity will not or basically will not produce exhaust gas during operation, and will cause less pollution to the environment. However, electric agricultural machinery will run out of power when running for a long time, and its endurance is poorer than that of fuel agricultural machinery; therefore, some agricultural machinery is equipped with a range extension module. As the fuel drive system is replaced by an electric drive system, the original cooling system of fuel agricultural machinery cannot be applied to electric agricultural machinery, or the original cooling system has a poor effect on electric agricultural machinery, which is not conducive to the operation of electric agricultural machinery. Summary of the invention

[0004] The object of the present invention is to provide a cooling system for an electric agricultural machinery, which is used to provide a cooling system suitable for the electric agricultural machinery and facilitate the operation of the electric agricultural machinery.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A cooling system for an electric agricultural machine, the electric agricultural machine comprising a generator and a fuel engine, the fuel engine being connected to the generator and used to supply energy to the generator so that the generator generates electrical energy, the cooling system for the electric agricultural machine comprising:

[0007] A first storage area, for storing coolant;

[0008] a first circulation loop, connecting the fuel engine and the first storage area, so that the coolant in the first storage area can circulate between the fuel engine and the first storage area;

[0009] A heat dissipation module, used to cool the coolant;

[0010] A second circulation loop is connected to the fuel engine and the heat dissipation module so that the coolant can circulate between the fuel engine and the heat dissipation module;

[0011] The coolant may selectively flow in the first circulation loop or the second circulation loop.

[0012] Preferably, a second thermostat is provided in the fuel engine, and the second thermostat is provided with a first outlet connected to the first storage area and a second outlet connected to the heat dissipation module; the second thermostat can selectively open the first outlet or the second outlet to allow the coolant to flow in the first circulation loop or the second circulation loop.

[0013] Preferably, a first thermostat is provided on the first circulation loop, and the first thermostat is located downstream of the first storage area along the flow direction of the coolant and upstream of the fuel engine along the flow direction of the coolant.

[0014] Preferably, it also includes a liquid supply path, which connects the first storage area and the heat dissipation module, and the first storage area directly provides coolant to the heat dissipation module through the liquid supply path, and the coolant supplied by the liquid supply path exchanges heat with the coolant in the second circulation loop in the heat dissipation module.

[0015] Preferably, it also includes a third circulation loop and a second storage area for supplying coolant to the third circulation loop; the third circulation loop connects the generator and the heat dissipation module so that the coolant circulates between the generator and the heat dissipation module.

[0016] Preferably, the electric agricultural machinery also includes an energy storage battery and an air-conditioning module; the electric agricultural machinery cooling system also includes a first flow path and a first heat exchanger, the first flow path connects the second storage area and the energy storage battery, and connects the energy storage battery and the first heat exchanger; the first heat exchanger is connected to the air-conditioning module, and the coolant flowing out of the energy storage battery and the refrigerant medium in the air-conditioning module exchange heat in the first heat exchanger.

[0017] Preferably, it also includes a temperature sensor, which is arranged at least at a position where the energy storage battery is used to receive coolant and a position where the energy storage battery is used to discharge coolant; the temperature sensor is used to monitor the temperature of the energy storage battery.

[0018] Preferably, the electric agricultural machinery further includes a cab, and the electric agricultural machinery cooling system is further provided with a heating element and a fourth circulation loop connecting the heating element and the cab, and the coolant in the fourth circulation loop circulates between the heating element and the cab.

[0019] Preferably, a second heat exchanger is further included, and the coolant flowing out of the first heat exchanger flows to the second heat exchanger; the fourth circulation loop includes a circulation main road and a first circulation branch, the heating element and the cab are arranged on the circulation main road, the circulation main road is connected to the second heat exchanger through the first circulation branch, and the circulation main road can supply coolant to the second heat exchanger, or receive coolant provided by the second heat exchanger.

[0020] Preferably, the fourth circulation loop also includes a second circulation branch, the main circulation circuit is connected to the fuel engine through the second circulation branch, and the main circulation circuit can supply coolant to the fuel engine, or receive coolant provided by the fuel engine.

[0021] Preferably, the main circulation circuit is provided with a first solenoid valve and a second solenoid valve, and the opening of the first solenoid valve can be selectively connected to the first circulation branch or the main circulation circuit, so that the coolant can selectively flow to the first circulation branch or flow in the main circulation circuit;

[0022] The opening of the second solenoid valve can be selectively connected to the second circulation branch or the circulation main circuit, so that the coolant can selectively flow to the second circulation branch or flow in the circulation main circuit.

[0023] Preferably, it also includes a first branch connecting the first flow path and the second heat exchanger, the connection position of the first branch and the first flow path is located upstream of the energy storage battery along the flow direction of the coolant, and the coolant flowing out of the second storage area can flow directly to the second heat exchanger through the first branch.

[0024] Compared with the prior art, the beneficial effects of the present invention include at least:

[0025] By setting the first circulation loop and the second circulation loop, the coolant in the cooling system can selectively flow in the first circulation loop or the second circulation loop to adapt to different working conditions of the electric agricultural machinery and facilitate the operation of the electric agricultural machinery. When the fuel engine in the electric agricultural machinery is just started, the temperature of the fuel engine is relatively low. At this time, the coolant can flow in a small range in the first circulation loop, and the fuel engine can quickly reach the required working temperature, which is conducive to the vaporization and combustion of the fuel; when the temperature of the fuel engine is relatively high, the coolant can flow in the second circulation loop, and the coolant is dissipated through the heat dissipation module, thereby improving the cooling effect of the coolant on the fuel engine and ensuring the normal movement of the fuel engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a cooling system for an electric agricultural machine according to an embodiment of the present invention;

[0027] Figure 2 is a partial structural schematic diagram of an engine cooling unit according to an embodiment of the present invention;

[0028] Figure 3 It is another partial structural schematic diagram of the engine cooling unit according to an embodiment of the present invention;

[0029] Figure 4 is a schematic structural diagram of a generator cooling unit according to an embodiment of the present invention;

[0030] Figure 5 is a schematic structural diagram of a battery cooling unit according to an embodiment of the present invention;

[0031] Figure 6 It is a schematic structural diagram of a cab heat exchange unit according to an embodiment of the present invention.

[0032] In the figure: 200, energy storage battery; 300, fuel engine; 301, first inlet; 302, first outlet; 303, second outlet; 400, generator; 500, cab; 1, engine cooling unit; 11, first storage area; 111, first water outlet; 112, first water inlet; 113, liquid supply flow path; 12, first circulation loop; 121, first thermostat; 122, second thermostat; 13, heat dissipation module; 131, radiator; 1311, first heat dissipation inlet; 1312, first heat dissipation outlet; 1313, second heat dissipation inlet; 1314, second heat dissipation outlet; 132, cooling fan; 14, second circulation loop; 15, third thermostat; 151, second inlet; 152, third inlet; 153, third outlet ; 2. Generator cooling unit; 21. Second storage area; 22. Third circulation loop; 221. Fourth thermostat; 3. Battery cooling unit; 31. First flow path; 311. First branch; 32. First heat exchanger; 321. Sixth thermostat; 33. Second heat exchanger; 331. First heat exchange inlet; 332. Second heat exchange inlet; 333. Third heat exchange inlet; 334. Heat exchange outlet; 34. Fifth thermostat; 35. Temperature sensor; 36. Battery water pump; 4. Cab heat exchange unit; 41. Fourth circulation loop; 411. Main circulation path; 4111. First three-way interface; 4112. Second three-way interface; 412. First circulation branch; 413. Second circulation branch; 42. Heating element; 43. First solenoid valve; 44. Second solenoid valve. DETAILED DESCRIPTION

[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0034] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0035] like Figure 1 As shown, the present invention provides a cooling system for electric agricultural machinery. The electric agricultural machinery is an agricultural machinery that uses electricity as a driving energy source, and the electric agricultural machinery includes an electric motor, an energy storage battery 200, and a range-extending unit. The energy storage battery 200 can supply electric energy to the electric motor so that the electric motor can drive the agricultural machinery to operate. The range-extending unit can generate electric energy and supply it to the energy storage battery 200 or the electric motor. The range-extending unit includes a fuel engine 300 and a generator 400. The fuel engine 300 can obtain energy by burning fuel to drive the generator 400 to generate electric energy, and the electric energy generated by the generator 400 is supplied to the energy storage battery 200 or the electric motor to achieve the range-extending effect on the agricultural machinery. Among them, the fuel engine 300 can specifically be a methanol engine that uses methanol as fuel.

[0036] The electric agricultural machinery cooling system may include an engine cooling unit 1 for cooling a fuel engine 300, a generator cooling unit 2 for cooling a generator 400, a battery cooling unit 3 for cooling an energy storage battery 200, and a cab heat exchange unit 4 for cooling a cab 500 of the electric agricultural machinery.

[0037] Reference Figures 1 to 3The engine cooling unit 1 includes a first storage area 11, a first circulation loop 12, a heat dissipation module 13 and a second circulation loop 14. The first storage area 11 is used to store coolant, for example, the first storage area 11 is a liquid storage tank for storing coolant. The first circulation loop 12 connects the fuel engine 300 and the first storage area 11, so that the coolant in the first storage area 11 can circulate between the fuel engine 300 and the first storage area 11. Specifically, the first storage area 11 can be provided with a first water outlet 111 and a first water inlet 112, the fuel engine 300 is provided with a first inlet 301 and a first outlet 302, the first circulation loop 12 connects the first water outlet 111 and the first inlet 301, and connects the first water inlet 112 and the first outlet 302. When the fuel engine 300 is started, the coolant in the first storage area 11 flows from the first water outlet 111 to the first inlet 301 to flow into the fuel engine 300, and then the coolant flows from the first outlet 302 to the first water inlet 112 to flow into the first storage area 11. The coolant forms a small-scale circulation flow along this path, and the coolant does not use a heat dissipation device to dissipate heat. The temperature of the fuel engine 300 is relatively low when it is started. The coolant is set in the first circulation loop 12 to form a small-scale flow, which can accelerate the temperature rise rate of the fuel engine 300, help the vaporization and combustion of the fuel, and also reduce the wear of the fuel engine 300 at low temperatures. Among them, a water pump can be set on the first circulation loop 12, and the water pump is used to drive the coolant to circulate in the first circulation loop 12.

[0038] In some specific embodiments, in order to facilitate the control of the flow rate and the on-off of the coolant, a first thermostat 121 and a second thermostat 122 are provided on the first circulation loop 12. The first thermostat 121 can be provided between the first water outlet 111 and the first inlet 301 to control the flow rate of the coolant flowing into the fuel engine 300 or to control the on-off between the first water outlet 111 and the first inlet 301. The second thermostat 122 can be provided in the fuel engine 300, and the first outlet 302 of the fuel engine 300 is formed on the second thermostat 122, and the second thermostat 122 is used to control the flow rate of the coolant flowing out of the fuel engine 300 or the on-off between the first outlet 302 and the first water inlet 112.

[0039] The heat dissipation module 13 is used to cool the coolant. Specifically, the heat dissipation module 13 may include a radiator 131 and a cooling fan 132. The radiator 131 may be composed of a metal tube and a heat sink, the coolant may flow into the metal tube of the radiator 131 for heat dissipation, the heat sink is used to increase the heat dissipation area of ​​the radiator 131, and the cooling fan 132 is arranged at the rear of the radiator 131 and can blow air toward the radiator 131 to speed up the air flow speed out of the radiator 131, thereby increasing the heat dissipation effect of the radiator 131.

[0040] Reference Figure 3 The second circulation loop 14 connects the fuel engine 300 and the heat dissipation module 13 so that the coolant can circulate between the fuel engine 300 and the heat dissipation module 13. Specifically, the fuel engine 300 may be provided with a second outlet 303, and the radiator 131 in the heat dissipation module 13 is provided with a first heat dissipation inlet 1311 and a first heat dissipation outlet 1312. The second circulation loop 14 connects the second outlet 303 and the first heat dissipation inlet 1311, and connects the first heat dissipation outlet 1312 and the first inlet 301 of the fuel engine 300. The coolant in the fuel engine 300 flows from the second outlet 303 to the first heat dissipation inlet 1311 to flow into the radiator 131 for heat dissipation. The coolant after heat dissipation by the radiator 131 flows from the first heat dissipation outlet 1312 to the first inlet 301 to flow into the fuel engine 300. The coolant circulates along this path to continuously dissipate heat for the fuel engine 300. Among them, a water pump may be provided on the second circulation loop 14, and the water pump is used to drive the coolant to circulate in the second circulation loop 14.

[0041] The second outlet 303 of the fuel engine 300 may be formed on the second thermostat 122. When the fuel engine 300 is started, the temperature of the fuel engine 300 is relatively low. At this time, the second thermostat 122 closes the second outlet 303 to prevent the coolant from flowing to the heat dissipation module 13, and allows the coolant to circulate in the first circulation loop 12. When the temperature of the fuel engine 300 rises to a temperature higher than that during normal operation, the second thermostat 122 opens the second outlet 303 to allow the coolant to flow to the heat dissipation module 13 and circulate in the second circulation loop 14, so that the coolant can continue to dissipate heat for the fuel engine 300, thereby preventing the fuel engine 300 from overheating due to continuous operation.

[0042] In some specific embodiments, the engine cooling unit 1 is further provided with a third thermostat 15, which is located on the first circulation loop 12 and the second circulation loop 14. The third thermostat 15 is provided with a second inlet 151, a third inlet 152 and a third outlet 153, the third outlet 153 is communicated with the first inlet 301 of the fuel engine 300, the second inlet 151 is communicated with the first water outlet 111 of the first storage area 11, and the third inlet 152 is communicated with the first heat dissipation outlet 1312 of the radiator 131. When the coolant flows in the first circulation loop 12, the coolant in the first storage area 11 flows from the first water outlet 111 to the second inlet 151 to flow into the third thermostat 15, and then flows from the third outlet 153 of the third thermostat 15 to the first inlet 301 to flow into the fuel engine 300. When the coolant flows in the second circulation loop 14 , the coolant flows from the first heat dissipation outlet 1312 of the radiator 131 to the third inlet 152 to flow into the third thermostat 15 , and then flows from the third outlet 153 of the third thermostat 15 to the first inlet 301 to flow into the fuel engine 300 .

[0043] In some specific embodiments, in order to improve the cooling effect of the coolant in the heat dissipation module 13, the first storage area 11 can be provided with a liquid supply path 113 connected to the radiator 131. The first storage area 11 can directly supply coolant to the radiator 131. The coolant supplied by the first storage area 11 can be mixed with the coolant flowing into the radiator 131 from the fuel engine 300. The coolant supplied by the first storage area 11 is a low-temperature coolant. The low-temperature coolant is mixed with the high-temperature coolant flowing into the radiator 131 from the fuel engine 300. The temperature of the coolant can be quickly reduced and the cooling effect of the coolant in the heat dissipation module 13 is improved.

[0044] Reference Figure 4The generator cooling unit 2 includes a third circulation loop 22 and a second storage area 21. The second storage area 21 is used to store coolant, for example, the second storage area 21 is a liquid storage tank for storing coolant; the coolant in the second storage area 21 can be supplied to the third circulation loop 22, or the second storage area 21 can recover the coolant in the third circulation loop 22. The third circulation loop 22 connects the generator 400 and the heat dissipation module 13, so that the coolant can circulate between the generator 400 and the heat dissipation module 13, thereby continuously cooling the generator 400. Among them, the radiator 131 is provided with a second heat dissipation inlet 1313 and a second heat dissipation outlet 1314, the coolant flowing out of the generator 400 flows to the second heat dissipation inlet 1313 to flow into the radiator 131, and the coolant flows out of the radiator 131 from the second heat dissipation outlet 1314 after the cooling of the coolant in the radiator 131 is completed and flows to the generator 400, and the coolant circulates along this path to continuously dissipate heat for the generator 400. The third circulation loop 22 may be provided with a water pump, and the water pump is used to drive the coolant to circulate in the third circulation loop 22 .

[0045] In some specific embodiments, the third circulation loop 22 may flow through the high-voltage auxiliary controller, the engine control unit, and the drive motor in addition to the generator 400, so that the coolant in the third circulation loop 22 may also cool the high-voltage auxiliary controller, the engine control unit, and the drive motor. The coolant may flow through the high-voltage auxiliary controller, the engine control unit, and the drive motor in sequence, and then flow into the generator 400. Among them, the high-voltage auxiliary controller, the engine control unit, and the drive motor are all internal components of the electric agricultural machine.

[0046] In addition, in order to control the flow of the coolant in the third circulation loop 22, a fourth thermostat 221 may be provided on the third circulation loop 22, and the fourth thermostat 221 is used to control the flow of the coolant and control the on-off of the third circulation loop 22. The fourth thermostat 221 may be specifically provided downstream of the generator 400 along the flow direction of the coolant, and the coolant flowing out of the generator 400 flows through the fourth thermostat 221 and then flows into the radiator 131.

[0047] In some specific embodiments, the radiator 131 may be provided with two mutually separated parts, one of which is used to receive the coolant in the second circulation loop 14, and the other part is used to receive the coolant in the third circulation loop 22, so that the coolant in the second circulation loop 14 and the coolant in the third circulation loop 22 can circulate independently. Alternatively, the coolant in the second circulation loop 14 and the coolant in the third circulation loop 22 flow into the radiator 131 and then mix, and a part of the coolant after heat dissipation by the radiator 131 flows in the second circulation loop 14 through the first heat dissipation outlet 1312, and a part of the coolant flows in the third circulation loop 22 through the second heat dissipation outlet 1314.

[0048] Reference Figure 5 The battery cooling unit 3 includes a first flow path 31, a first heat exchanger 32, and a second heat exchanger 33. The first flow path 31 can connect the second storage area 21 and the energy storage battery 200, so that the second storage area 21 can supply coolant to the energy storage battery 200 to cool the energy storage battery 200. In addition, the first flow path 31 also connects the energy storage battery 200 and the first heat exchanger 32, as well as the first heat exchanger 32 and the second heat exchanger 33. The coolant flowing out of the energy storage battery 200 can flow to the first heat exchanger 32, and the first heat exchanger 32 can be connected to the air conditioning module of the electric agricultural machinery, so that the coolant flowing out of the energy storage battery 200 can be heat exchanged with the low-temperature cooling medium in the air conditioning module in the first heat exchanger 32, thereby reducing the temperature of the coolant. Among them, the air conditioning module can adopt the common air conditioning module in existing vehicles, and the low-temperature cooling medium in the air conditioning module is a liquid low-temperature medium formed after the cooling medium is condensed and releases heat.

[0049] The coolant flowing out of the first heat exchanger 32 can flow to the second heat exchanger 33. The second heat exchanger 33 can be provided with a first heat exchange inlet 331, a second heat exchange inlet 332, a third heat exchange inlet 333 and a heat exchange outlet 334, and the coolant flowing out of the first heat exchanger 32 can flow to the first heat exchange inlet 331 and flow into the second heat exchanger 33 through the first heat exchange inlet 331.

[0050] In order to facilitate the control of the flow rate of the coolant flowing to the first heat exchange inlet 331, a fifth thermostat 34 is provided between the first heat exchanger 32 and the first heat exchange inlet 331. The coolant flowing out of the first heat exchanger 32 flows through the fifth thermostat 34 and then flows to the first heat exchange inlet 331. The fifth thermostat 34 is used to control the flow rate of the coolant flowing to the first heat exchange inlet 331 or to control the on-off of the flow path between the first heat exchanger 32 and the first heat exchange inlet 331. In addition, in order to facilitate the control of the flow rate of the coolant flowing into the first heat exchanger 32, a sixth thermostat 321 is provided between the energy storage battery 200 and the first heat exchanger 32. The sixth thermostat 321 is used to control the flow rate of the coolant flowing to the first heat exchanger 32 or to control the on-off of the flow path between the first heat exchanger 32 and the energy storage battery 200.

[0051] In some specific embodiments, the battery cooling unit 3 is further provided with a temperature sensor 35 for monitoring the temperature of the energy storage battery 200. When the temperature sensor 35 detects that the temperature of the energy storage battery 200 is too high, a coolant is supplied to the energy storage battery 200 to cool the energy storage battery 200. Moreover, according to the temperature detected by the temperature sensor 35, if the temperature of the energy storage battery 200 is only slightly increased, the supply amount of the coolant can be low at this time to achieve gentle cooling; if the temperature of the energy storage battery 200 is too high, the supply amount of the coolant can be increased to improve the cooling effect on the energy storage battery 200. Among them, two temperature sensors 35 can be provided, one temperature sensor 35 is provided at the position of the energy storage battery 200 for receiving the coolant, and the other temperature sensor 35 is provided at the position of the energy storage battery 200 for discharging the coolant, and the two temperature sensors 35 are used together to monitor the temperature of the energy storage battery 200. A battery water pump 36 for driving the flow of coolant is provided on the first flow path 31 . The battery water pump 36 adjusts actual power according to the temperature monitored by two temperature sensors 35 to change the flow rate of coolant flowing into the energy storage battery 200 .

[0052] In addition, the air conditioning module of the electric agricultural machine can also be adjusted according to the temperature of the energy storage battery 200 detected by the temperature sensor 35. Specifically, when the temperature of the energy storage battery 200 is low, the temperature of the coolant is low after flowing through the energy storage battery 200, and the coolant can be naturally cooled during the flow process. At this time, the air conditioning module may not supply low-temperature medium to the first heat exchanger 32. When the temperature of the energy storage battery 200 is high, the air conditioning module supplies low-temperature medium to the first heat exchanger 32 to perform heat exchange with the coolant to ensure the cooling effect of the coolant.

[0053] In some specific embodiments, the first flow path 31 can be connected to the first branch 311, the first branch 311 is connected to the second heat exchange inlet 332 of the second heat exchanger 33, and the connection position between the first branch 311 and the first flow path 31 is located in the upstream direction of the energy storage battery 200. Part of the coolant provided by the second storage area 21 can flow into the second heat exchanger 33 through the first branch 311 instead of flowing into the energy storage battery 200.

[0054] Reference Figure 6 , the cab heat exchange unit 4 is provided with a fourth circulation loop 41, a heating element 42, a first solenoid valve 43 and a second solenoid valve 44. The fourth circulation loop 41 may include a circulation main circuit 411 and a first circulation branch circuit 412 and a second circulation branch circuit 413 connected to the circulation main circuit 411. The circulation main circuit 411 connects the cab 500 and the heating element 42 so that the coolant can circulate between the cab 500 and the heating element 42. Specifically, the coolant flows into the cab 500 after being heated by the heating element 42 to provide heating for the cab 500, and the coolant flowing out of the cab 500 flows to the heating element 42 for reheating. Among them, the heating element 42 may specifically be a PTC heating element. The main circulation path 411 flows through the first solenoid valve 43. After the coolant flows into the first solenoid valve 43, the outlet of the first solenoid valve 43 can be selectively connected to the first circulation branch 412 so that the coolant flows into the first circulation branch 412, or the outlet of the first solenoid valve 43 can be selectively connected to the main circulation path 411 so that the coolant continues to flow in the main circulation path 411.

[0055] The first circulation branch 412 can be connected to the second heat exchanger 33, specifically, the first circulation branch 412 is connected to the first solenoid valve 43 and the third heat exchange inlet 333 of the second heat exchanger 33, and the heat exchange outlet 334 of the second heat exchanger 33 is connected to the circulation main path 411. The coolant flowing into the second heat exchanger 33 from the first solenoid valve 43 can be mixed with the coolant flowing in from the first heat exchange inlet 331 and the second heat exchange inlet 332 for heat exchange, and the mixed coolant can flow back to the circulation main path 411 from the heat exchange outlet 334.

[0056] Specifically, a first three-way interface 4111 is provided on the circulation main path 411, and the first three-way interface 4111 is provided downstream of the first solenoid valve 43 along the flow direction of the coolant, and the first three-way interface 4111 is connected to the heat exchange outlet 334 through the first circulation branch 412, and the coolant in the second heat exchanger 33 flows to the first three-way interface 4111 to flow into the circulation main path 411. Among them, the first solenoid valve 43 is not limited to being connected only to the first circulation branch 412 or only to the circulation main path 411, and the first solenoid valve 43 can also be connected to the first circulation branch 412 and the circulation main path 411 at the same time, and part of the coolant flowing into the first solenoid valve 43 flows to the first circulation branch 412, and part continues to flow in the circulation main path 411.

[0057] In addition, in the second heat exchanger 33, at the same time, only one of the first heat exchange inlet 331, the second heat exchange inlet 332, and the third heat exchange inlet 333 can receive the coolant, or multiple of the first heat exchange inlet 331, the second heat exchange inlet 332, and the third heat exchange inlet 333 can receive the coolant at the same time.

[0058] The circulation main circuit 411 is provided with a second solenoid valve 44, and the outlet of the second solenoid valve 44 can be selectively connected to the second circulation branch 413 or to the circulation main circuit 411. The second circulation branch 413 can connect the outlet of the second solenoid valve 44 and the fuel engine 300, and connect the fuel engine 300 and the circulation main circuit 411. The coolant flowing out through the second heat exchanger 33 has a lower temperature, and the coolant can flow from the second circulation branch 413 into the fuel engine 300 to absorb the heat generated by the fuel engine 300. The coolant after absorbing heat can flow to the circulation main circuit 411 to heat the coolant using the heat generated by the fuel engine 300, so as to provide more heat when the coolant flows into the cab 500, and realize the heat dissipation of the fuel engine 300.

[0059] Specifically, a second three-way interface 4112 may also be provided on the main circulation path 411, and the second three-way interface 4112 is located downstream of the second solenoid valve 44 along the flow direction of the coolant, and the second three-way interface 4112 is connected to the fuel engine 300 through the second circulation branch 413, and the coolant flowing out of the fuel engine 300 in the second circulation branch 413 can flow to the second three-way interface 4112 to flow into the main circulation path 411. Among them, the second solenoid valve 44 is not limited to being connected only to the second circulation branch 413 or only to the main circulation path 411, and the second solenoid valve 44 may also be connected to the second circulation branch 413 and the main circulation path 411 at the same time, and part of the coolant flowing into the second solenoid valve 44 flows to the second circulation branch 413, and part continues to flow in the main circulation path 411.

[0060] In addition, the coolant flowing from the second circulation branch 413 to the fuel engine 300 may also partially flow to the radiator 131 and flow in the third circulation loop 22 , so that the coolant can be recovered by the second storage area 21 .

[0061] In some specific embodiments, when the electric agricultural machinery is in operation, the electric agricultural machinery cooling system continuously absorbs heat to dissipate heat from the internal parts of the electric agricultural machinery, so that the temperature of the electric agricultural machinery cooling system increases. When the electric agricultural machinery is finished working, the temperature of the electric agricultural machinery cooling system drops. At this time, the coolant generates negative pressure in the electric agricultural machinery cooling system, which may cause damage to the radiator 131 or pipes and other components. In order to balance the pressure in the electric agricultural machinery cooling system, the electric agricultural machinery cooling system may also be provided with a radiator cap or an expansion tank and other components to balance the pressure in the cooling system and replenish the coolant when the coolant cools and shrinks.

[0062] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. An electric agricultural machinery cooling system, characterized in that: The electric agricultural machine comprises a generator (400) and a fuel engine (300), wherein the fuel engine (300) is connected to the generator (400) and is used to supply energy to the generator (400) so that the generator (400) generates electrical energy, and the electric agricultural machine cooling system comprises: A first storage area (11), used for storing cooling liquid; a first circulation loop (12) connecting the fuel engine (300) and the first storage area (11), so that the coolant in the first storage area (11) can circulate between the fuel engine (300) and the first storage area (11); A heat dissipation module (13), used for cooling the coolant; A second circulation loop (14) is connected to the fuel engine (300) and the heat dissipation module (13), so that the coolant can circulate between the fuel engine (300) and the heat dissipation module (13); The coolant can selectively flow in the first circulation loop (12) or the second circulation loop (14).

2. The electric agricultural machinery cooling system according to claim 1, characterized in that: The fuel engine (300) is provided with a second thermostat (122), and the second thermostat (122) is provided with a first outlet (302) connected to the first storage area (11) and a second outlet (303) connected to the heat dissipation module (13); the second thermostat (122) can selectively open the first outlet (302) or the second outlet (303) to allow the coolant to flow in the first circulation loop (12) or the second circulation loop (14).

3. The electric agricultural machinery cooling system according to claim 1, characterized in that: The first circulation loop (12) is provided with a first thermostat (121), and the first thermostat (121) is located downstream of the first storage area (11) along the flow direction of the coolant, and upstream of the fuel engine (300) along the flow direction of the coolant.

4. The electric agricultural machinery cooling system according to claim 1, characterized in that: The invention also comprises a liquid supply flow path (113), wherein the liquid supply flow path (113) is connected to the first storage area (11) and the heat dissipation module (13); the first storage area (11) directly provides cooling liquid to the heat dissipation module (13) through the liquid supply flow path (113); the cooling liquid supplied by the liquid supply flow path (113) exchanges heat with the cooling liquid in the second circulation loop (14) in the heat dissipation module (13).

5. The electric agricultural machinery cooling system according to claim 1, characterized in that: The invention also comprises a third circulation loop (14) and a second storage area (21) for supplying cooling liquid to the third circulation loop (14); the third circulation loop (14) is connected to the generator (400) and the heat dissipation module (13), so that the cooling liquid circulates between the generator (400) and the heat dissipation module (13).

6. The electric agricultural machinery cooling system according to claim 5, characterized in that: The electric agricultural machinery further comprises an energy storage battery (200) and an air conditioning module; the electric agricultural machinery cooling system further comprises a first flow path (31) and a first heat exchanger (32), wherein the first flow path (31) connects the second storage area (21) and the energy storage battery (200), and connects the energy storage battery (200) and the first heat exchanger (32); the first heat exchanger (32) is connected to the air conditioning module, and the coolant flowing out of the energy storage battery (200) exchanges heat with the refrigerant medium in the air conditioning module in the first heat exchanger (32).

7. The electric agricultural machinery cooling system according to claim 6, characterized in that: It also includes a temperature sensor (35), which is arranged at least at a position of the energy storage battery (200) for receiving coolant and a position of the energy storage battery (200) for discharging coolant; the temperature sensor (35) is used to monitor the temperature of the energy storage battery (200).

8. The electric agricultural machinery cooling system according to claim 6, characterized in that: The electric agricultural machine further comprises a cab (500), and the cooling system of the electric agricultural machine is further provided with a heating element (42) and a fourth circulation loop (41) connecting the heating element (42) and the cab (500), wherein the cooling liquid in the fourth circulation loop (41) circulates between the heating element (42) and the cab (500).

9. The electric agricultural machinery cooling system according to claim 8, characterized in that: It also includes a second heat exchanger (33), and the coolant flowing out of the first heat exchanger (32) flows to the second heat exchanger (33); the fourth circulation loop (41) includes a circulation main path (411) and a first circulation branch path (412), the heating element (42) and the cab (500) are arranged on the circulation main path (411), the circulation main path (411) is connected to the second heat exchanger (33) through the first circulation branch path (412), and the circulation main path (411) can supply coolant to the second heat exchanger (33), or receive coolant provided by the second heat exchanger (33).

10. The electric agricultural machinery cooling system according to claim 9, characterized in that: The fourth circulation loop (41) further includes a second circulation branch (413), the main circulation path (411) is connected to the fuel engine (300) via the second circulation branch (413), and the main circulation path (411) is capable of supplying coolant to the fuel engine (300) or receiving coolant provided by the fuel engine (300).

11. The electric agricultural machinery cooling system according to claim 10, characterized in that: The main circulation path (411) is provided with a first solenoid valve (43) and a second solenoid valve (44); an opening of the first solenoid valve (43) can be selectively connected to the first circulation branch path (412) or the main circulation path (411), so that the coolant can selectively flow to the first circulation branch path (412) or flow in the main circulation path (411); The opening of the second solenoid valve (44) can be selectively connected to the second circulation branch (413) or the circulation main circuit (411), so that the coolant can selectively flow to the second circulation branch (413) or flow in the circulation main circuit (411).

12. The electric agricultural machinery cooling system according to claim 9, characterized in that: It also includes a first branch (311) connecting the first flow path (31) and the second heat exchanger (33); the connection position between the first branch (311) and the first flow path (31) is located upstream of the energy storage battery (200) along the flow direction of the coolant; the coolant flowing out of the second storage area (21) can flow directly to the second heat exchanger (33) through the first branch (311).

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