Rail vehicle and multifunctional integrated ventilation cooling system and method thereof

Abstract

The application discloses a rail vehicle and a multifunctional integrated ventilation and cooling system and method thereof. The system comprises a cooling device, an air duct and a control device. The cooling device comprises a radiator and a cooling fan, and the water inlet and outlet of the radiator are connected with the water inlet and outlet of a converter. The air duct is divided into a first branch and a second branch. The first air outlet of the first branch is connected with different traction motors, and the second air outlet of the second branch is connected with each power supply device. An adjustable air door adjusted by a driving mechanism is arranged on the corresponding branch of the second air outlet and the second branch. The control device controls the air outlet of the cooling fan according to the heat dissipation of the converter, the air outlet temperature of the cooling fan and the ambient temperature, controls the cooling of the converter according to the heat dissipation of the converter and the temperature of the water inlet and outlet of the converter, and controls the adjustable air door according to different power supply modes to realize the cooling control of the traction motor and the power supply device. The application can solve the problems of integrated cooling and the limitation of the line axle load and the vehicle space.

Description

Technical Field

[0001] This invention belongs to the field of rail vehicle cooling technology, and particularly relates to a rail vehicle and its multi-functional integrated ventilation and cooling system and method. Background Technology

[0002] Currently, AC electric locomotive ventilation and cooling systems generally adopt a single cooling method or an independent ventilation mode. The single cooling method means that one cooling fan cools only one traction motor. In some diesel locomotives and hybrid locomotives, one cooling fan cools two or three traction motors. The independent ventilation mode means that each cooling object is cooled independently, such as the traction motor and the converter.

[0003] With the increasing functionality of rail vehicles, especially with the introduction of the "last mile" concept, it is necessary to integrate electric and internal combustion power while ensuring traction power, i.e., to achieve hybrid electric and hybrid diesel power. Due to limitations such as track axle load and vehicle space, locomotive auxiliary systems, especially ventilation and cooling systems, must be highly integrated. The integration of ventilation and cooling systems makes the original single cooling method or independent ventilation mode unacceptable on the overall vehicle platform due to installation space and weight issues.

[0004] Therefore, after rail vehicles achieve multi-functional integration, how to achieve integrated cooling of various cooling components (such as traction motors and converters) is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide a rail vehicle and its multi-functional integrated ventilation and cooling system and method to solve the problem that traditional single cooling methods or independent ventilation modes cannot adapt to the integrated cooling of multiple cooling objects after multi-functional integration. This invention achieves integrated cooling of multiple cooling objects under different modes through multi-functional air ducts and movable air dampers and drive mechanisms on the air ducts.

[0006] This invention solves the above-mentioned technical problems through the following technical solution: a multi-functional integrated ventilation and cooling system for rail vehicles, comprising:

[0007] A cooling device includes a radiator and a cooling fan. The radiator is located at the front or rear end of the cooling fan. The water inlet of the radiator is connected to the water outlet of the converter, and the water outlet of the radiator is connected to the water inlet of the converter through a water pump. The front end refers to the air inlet side of the cooling fan, and the rear end refers to the air outlet side of the cooling fan.

[0008] The air duct has a first end connected to the air outlet of the cooling fan, and a second end divided into a first branch and a second branch. The first branch has multiple first air outlets, each of which is connected to a different traction motor. The second branch has multiple second air outlets, each of which is connected to a power supply device. Each branch corresponding to a second air outlet and the second branch are equipped with movable dampers that are adjusted by the drive mechanism D.

[0009] The control device is configured to control the airflow of the cooling fan based on the heat dissipation of the converter, the outlet temperature of the cooling fan, and the ambient temperature; control the flow rate of the cooling medium in the cooling medium circuit based on the heat dissipation of the converter and the temperatures of the converter's inlet and outlet, thereby achieving cooling control of the converter; and control each drive mechanism to adjust the opening and closing of the movable damper according to different power supply modes of the vehicle, thereby achieving cooling control of the traction motor and each power supply device.

[0010] In this invention, a cooling fan draws in cold outdoor air, which first cools the converter through a cooling medium circulation loop between the radiator and the converter. The cold air then flows through ducts into the traction motor, generator, diesel engine compartment, and battery pack. Multiple movable dampers, adjustable by a drive mechanism, are installed in the ducts. The opening and closing of these dampers are controlled by the drive mechanism, thereby achieving cooling of the traction motor and various power supply equipment under different power supply modes. This invention enables cooling control of multiple cooling components, including the converter, traction motor, and various power supply equipment, solving the problems of integrated cooling and limitations imposed by line axle load and vehicle space, thus improving auxiliary equipment energy utilization and vehicle operating efficiency.

[0011] Furthermore, a guide vane and an adjustment mechanism for driving the guide vane to deflect are provided at the intersection of the first branch and the second branch.

[0012] The control device is further configured to control the operation of the adjustment mechanism according to the heat dissipation requirements of each traction motor and each power supply device, thereby adjusting the deflection angle of the guide vanes to achieve air volume distribution of the first branch and the second branch, so as to meet the heat dissipation requirements of each traction motor and each power supply device.

[0013] Furthermore, a filter device is provided at the front end of the cooling fan, which is used to filter the air entering the cooling fan.

[0014] Preferably, the filtering device is a louver.

[0015] Furthermore, when the radiator is located at the rear end of the cooling fan, a fixed damper is provided between the radiator and the cooling fan to supply air to the electrical room, thereby achieving ventilation, cooling, and positive pressure design of the electrical room.

[0016] Furthermore, the power supply equipment includes a generator, a diesel engine room, and a battery pack.

[0017] Furthermore, a first movable damper adjusted by a first drive mechanism D1 to a fourth movable damper adjusted by a fourth drive mechanism D4 are sequentially provided on the second branch; a second air outlet between the first movable damper and the second movable damper is connected to a generator, and a fifth movable damper adjusted by a fifth drive mechanism D5 is provided on the branch corresponding to the second air outlet; a second air outlet between the second movable damper and the third movable damper is connected to a diesel engine room, and a sixth movable damper adjusted by a sixth drive mechanism D6 is provided on the branch corresponding to the second air outlet; a second air outlet between the third movable damper and the fourth movable damper is connected to a battery pack, and a seventh movable damper adjusted by a seventh drive mechanism D7 is provided on the branch corresponding to the second air outlet.

[0018] Based on the same inventive concept, the present invention also provides a control method for the above-mentioned multifunctional integrated ventilation and cooling system for rail vehicles, comprising:

[0019] The heat dissipation of the converter, the outlet air temperature of the cooling fan, and the ambient temperature are obtained, and the operation of the cooling fan is controlled based on the heat dissipation of the converter, the outlet air temperature of the cooling fan, and the ambient temperature, thereby controlling the air volume of the cooling fan.

[0020] The temperature of the converter inlet and outlet is obtained, and the flow rate of the cooling medium in the cooling medium circuit is controlled according to the heat dissipation of the converter and the temperature of the converter inlet and outlet, so as to realize the cooling control of the converter.

[0021] The system obtains the vehicle's power supply mode and controls each drive mechanism to adjust the opening and closing of the movable dampers based on the vehicle's power supply mode, thereby achieving cooling control of the traction motor and various power supply equipment.

[0022] Furthermore, the formula for calculating the air volume of the cooling fan is:

[0023]

[0024] Where V is the air volume of the cooling fan, Q is the heat dissipation of the converter, C1 is the specific heat constant of air, ρ is the air density, t1 is the air outlet temperature, and t2 is the ambient temperature.

[0025] Furthermore, the formula for calculating the flow rate of the cooling medium is:

[0026]

[0027] Where q is the flow rate of the cooling medium, Q is the heat dissipation of the converter, C2 is the specific heat constant of the cooling medium, T1 is the inlet temperature of the converter, and T2 is the outlet temperature of the converter.

[0028] Furthermore, the specific implementation process of controlling each drive mechanism to adjust the opening and closing of the movable damper according to the vehicle's power supply mode is as follows:

[0029] In pantograph-catenary power supply mode, the first drive mechanism D1 is controlled to move, thereby controlling the first movable damper to close, and only cooling is applied to each traction motor;

[0030] In the internal combustion engine power supply mode, the first drive mechanism D1, the fifth drive mechanism D5, the second drive mechanism D2 and the sixth drive mechanism D6 are controlled to operate, thereby controlling the opening of the first movable damper, the fifth movable damper, the second movable damper and the sixth movable damper; the third drive mechanism D3 is controlled to operate, thereby controlling the closing of the third movable damper, to cool each traction motor, generator and diesel engine compartment;

[0031] In battery-powered mode, the first drive mechanism D1, the second drive mechanism D2, the third drive mechanism D3, and the seventh drive mechanism D7 are controlled to operate, thereby controlling the first movable damper, the second movable damper, the third movable damper, and the seventh movable damper to open; the fifth drive mechanism D5, the sixth drive mechanism D6, and the fourth drive mechanism D4 are controlled to operate, thereby controlling the fifth movable damper, the sixth movable damper, and the fourth movable damper to close, thereby cooling the traction motor and the battery pack.

[0032] Based on the same inventive concept, the present invention also provides a rail vehicle equipped with the multi-functional integrated ventilation and cooling system for rail vehicles as described above.

[0033] Beneficial effects

[0034] Compared with the prior art, the advantages of the present invention are as follows:

[0035] This invention provides a rail vehicle and its multi-functional integrated ventilation and cooling system and method. First, the converter is cooled through a cooling medium circulation loop between the radiator and the converter. Then, the system connects the traction motor, generator, diesel engine compartment, and battery pack through air ducts. The opening and closing of the movable dampers are adjusted by controlling the drive mechanism to achieve cooling of the traction motor and various power supply equipment under different power supply modes. This invention can achieve cooling control of multiple cooling objects such as the converter, traction motor, and various power supply equipment, solving the problems of integrated cooling and the limitations of track axle load and vehicle space, thus improving the energy utilization rate of auxiliary equipment and the operating efficiency of the vehicle.

[0036] This invention can solve the cooling and heat dissipation problem of multiple integrated components such as the main converter, traction motor, diesel generator, diesel engine compartment, and battery pack in dual-mode locomotives (electric-electric dual-mode or oil-electric dual-mode). It can also solve the ventilation and cooling problems in various operating modes such as pantograph-catenary power supply mode, internal combustion power supply mode, and battery power supply mode. Attached Figure Description

[0037] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a side view of the ventilation and cooling system in an embodiment of the present invention;

[0039] Figure 2 This is a front view of the ventilation and cooling system in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the control principle of the ventilation and cooling system in an embodiment of the present invention;

[0041] Figure 4 This is a structural diagram of a ventilation and cooling system with a fixed damper in an embodiment of the present invention.

[0042] Among them, 1-louver, 2-cooling device, 21-radiator, 22-cooling fan, 3-air duct, 31-first branch, 32-guide vane, 33-second branch, 4-fixed damper. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0045] like Figure 1 and 2As shown in the figure, the multi-functional integrated ventilation and cooling system for rail vehicles provided in this embodiment of the invention includes a cooling device 2, an air duct 3, and a control device. The cooling device 2 includes a radiator 21 and a cooling fan 22. The radiator 21 is located at the front end or rear end of the cooling fan 22. The inlet of the radiator 21 is connected to the outlet of the converter. The outlet of the radiator 21 is connected to the inlet of the converter through a water pump. The front end refers to the air inlet side of the cooling fan 22, and the rear end refers to the air outlet side of the cooling fan 22. The first end of the air duct 3 is connected to the air outlet of the cooling fan 22. The second end of the air duct 3 is divided into a first branch 31 and a second branch 33. Multiple first air outlets are provided on the first branch 31, and each first air outlet is connected to a different traction motor. Multiple second air outlets are provided on the second branch 33, and each second air outlet is connected to a generator, a diesel engine room, a battery pack, and other equipment. A movable damper adjusted by a drive mechanism D is provided on the branch corresponding to each second air outlet and on the second branch 33.

[0046] The control device controls the airflow of the cooling fan 22 based on the heat dissipation of the converter, the outlet temperature of the cooling fan 22, and the ambient temperature. It also controls the flow rate of the cooling medium in the cooling medium circuit based on the heat dissipation of the converter and the temperatures of the converter's inlet and outlet, thereby achieving cooling control of the converter. Furthermore, it controls each drive mechanism to adjust the opening and closing of the movable damper according to different power supply modes of the vehicle, thereby achieving cooling control of the traction motor and each power supply device.

[0047] The cooling fan 22 provides the power for the cooling air required by the ventilation and cooling system of the present invention; the air duct 3 is used to introduce the cooling air into the traction motor, various power supply equipment and other cooling objects. Each movable air damper on the air duct 3 is controlled by a corresponding drive mechanism. The opening and closing or opening degree of the movable air damper is adjusted by the drive mechanism to realize the control of the cooling object and the adjustment of the air volume of the cooling object; the radiator 21 is used to absorb the heat dissipation of the converter and exchange heat with the cooling air to realize the cooling of the converter.

[0048] In this embodiment, the driving mechanism is a solenoid valve. The solenoid valve controls the opening and closing or the degree of opening of the movable damper, thereby realizing the cutting off and switching of cooling ventilation for the generator, diesel engine room, and battery pack in electric-electric mode and oil-electric mode. This enables multiple cooling functions and meets the switching requirements for ventilation and cooling in various operating modes of the locomotive.

[0049] In one specific embodiment of the present invention, a guide vane 32 and an adjustment mechanism for driving the guide vane 32 to deflect are provided at the intersection of the first branch 31 and the second branch 33; the control device controls the operation of the adjustment mechanism according to the heat dissipation requirements of each traction motor and each power supply device, thereby adjusting the deflection angle of the guide vane 32 to realize the air volume distribution of the first branch 31 and the second branch 33, that is, to realize the air volume distribution of the traction motor and the power supply device, so as to meet the heat dissipation requirements of each traction motor and each power supply device.

[0050] In one specific embodiment of the present invention, a filter device is further provided at the front end of the cooling fan 22, the filter device being used to filter the air entering the cooling fan 22. In this embodiment, the filter device is a louver 1.

[0051] In one specific embodiment of the present invention, such as Figure 3 As shown, the power supply equipment includes a generator, a diesel engine room, and a battery pack; a first movable damper adjusted by a first drive mechanism D1 to a fourth movable damper adjusted by a fourth drive mechanism D4 are sequentially provided on the second branch 33; a second air outlet between the first movable damper and the second movable damper is connected to the generator, and a fifth movable damper adjusted by a fifth drive mechanism D5 is provided on the branch corresponding to the second air outlet; a second air outlet between the second movable damper and the third movable damper is connected to the diesel engine room, and a sixth movable damper adjusted by a sixth drive mechanism D6 is provided on the branch corresponding to the second air outlet; a second air outlet between the third movable damper and the fourth movable damper is connected to the battery pack, and a seventh movable damper adjusted by a seventh drive mechanism D7 is provided on the branch corresponding to the second air outlet.

[0052] The heat generated by the converter due to losses enters the cooling medium circulation loop between the radiator 21 and the converter. The coolant in the cooling medium circulation loop enters the radiator 21, where the cooling medium exchanges heat with the cooling air introduced by the cooling fan 22, achieving the cooling effect of the converter. At the same time, the cooling air introduced by the cooling fan 22 enters each traction motor and each power supply equipment through the air duct 3. The cooling control of each traction motor and different power supply equipment is achieved by controlling the movable air damper, solving the ventilation and cooling problems under different power supply modes, solving the integrated cooling problem, and solving the limitations of line axle load and vehicle space, thereby improving the energy utilization rate of auxiliary equipment and the operating efficiency of the vehicle. In this embodiment, the cooling medium is cooling water.

[0053] In one specific embodiment of the present invention, such as Figure 4As shown, when the radiator 21 is located at the rear end of the cooling fan 22, a fixed damper 4 is installed between the radiator 21 and the cooling fan 22. Air is supplied to the electrical room through the fixed damper 4, achieving ventilation, cooling, and positive pressure design of the electrical room. By supplying air to the electrical room, positive pressure is achieved under the action of wind pressure, and the ventilation volume q of the electrical room... x This can be achieved by adjusting the opening of the fixed damper 4.

[0054] Based on the same inventive concept, embodiments of the present invention also provide a control method for the multifunctional integrated ventilation and cooling system for rail vehicles as described above, such as... Figure 3 As shown, the control method includes:

[0055] (1) Calculation of cooling fan output volume: Obtain the heat dissipation of the converter, the air outlet temperature of the cooling fan and the ambient temperature, and control the operation of the cooling fan according to the heat dissipation of the converter, the air outlet temperature of the cooling fan and the ambient temperature, thereby controlling the output volume of the cooling fan.

[0056] The airflow of the cooling fan is determined by the heat dissipation of the inverter, the outlet air temperature of the cooling fan, and the ambient temperature. The specific formula is as follows:

[0057]

[0058] Where V is the air volume of the cooling fan, Q is the heat dissipation of the converter, C1 is the specific heat constant of air, ρ is the air density, t1 is the air outlet temperature, and t2 is the ambient temperature.

[0059] By determining any two parameters in equation (1), the third parameter can be calculated, thus achieving dynamic system balance. That is, these three parameters (V, Q, t1) can be dynamically adjusted. The cooling fan's airflow is controlled to meet the heat dissipation requirements under various power supply modes.

[0060] (2) Ventilation and cooling of the converter: The temperature of the inlet and outlet of the converter is obtained, and the flow rate of the cooling medium in the cooling medium circuit is controlled according to the heat dissipation of the converter and the temperature of the inlet and outlet of the converter, so as to realize the cooling control of the converter.

[0061] The flow rate of the cooling medium is determined by the heat dissipation of the converter and the temperatures of the converter's inlet and outlet. The specific formula is as follows:

[0062]

[0063] Where q is the flow rate of the cooling medium, Q is the heat dissipation of the converter, C2 is the specific heat constant of the cooling medium, T1 is the inlet temperature of the converter, and T2 is the outlet temperature of the converter.

[0064] By determining any two parameters in equation (2), the third parameter can be calculated, achieving dynamic balance. That is, these three parameters (q, Q, T1, and T2) can be dynamically adjusted. The heat dissipation requirements of the converter are met by controlling the flow rate of the cooling medium.

[0065] (3) Cooling control under different power supply modes

[0066] The system obtains the vehicle's power supply mode and controls the opening and closing of the movable dampers in each drive mechanism based on this mode, thereby controlling the cooling of the traction motor and various power supply devices. The specific implementation process is as follows:

[0067] (3.1) In the pantograph-catenary power supply mode, the first drive mechanism D1 is controlled to operate, thereby controlling the first movable damper to close, so as to cool only each traction motor.

[0068] In this embodiment, there are three traction motors, whose required air volumes are V1, V2, and V3, respectively, typically V1 = V2 = V3. Only the traction motors are cooled; therefore, V = V1 + V2 + V3.

[0069] (3.2) In the internal combustion engine power supply mode, the first drive mechanism D1, the fifth drive mechanism D5, the second drive mechanism D2 and the sixth drive mechanism D6 are controlled to operate, thereby controlling the first movable damper, the fifth movable damper, the second movable damper and the sixth movable damper to open; the third drive mechanism D3 is controlled to operate, thereby controlling the third movable damper to close, so as to cool each traction motor, generator and diesel engine compartment.

[0070] In this embodiment, the required airflow for the generator and the diesel engine room is set to V4 and V5, respectively. The cooling objects include the traction motor, the generator, and the diesel engine room. Therefore, V = V1 + V2 + V3 + V4 + V5. The airflow distribution of V1 + V2 + V3 and V4 + V5 can be achieved by adjusting the deflection angle of the guide vanes through the adjustment mechanism. The magnitudes of V4 and V5 can be adjusted by the opening of the corresponding drive mechanism (D1 / D2 / D5 / D6), for example, the drive mechanism is an electromagnetic proportional valve or a servo valve.

[0071] (3.3) In the battery power supply mode, the first drive mechanism D1, the second drive mechanism D2, the third drive mechanism D3 and the seventh drive mechanism D7 are controlled to operate, thereby controlling the first movable damper, the second movable damper, the third movable damper and the seventh movable damper to open; the fifth drive mechanism D5, the sixth drive mechanism D6 and the fourth drive mechanism D4 are controlled to operate, thereby controlling the fifth movable damper, the sixth movable damper and the fourth movable damper to close, so as to cool the traction motor and the battery pack.

[0072] In this embodiment, the required airflow for the battery pack is V6. The cooling objects are the traction motor and the battery pack, so V = V1 + V2 + V3 + V6. The airflow distribution of V1 + V2 + V3 and V6 can be achieved by adjusting the deflection angle of the guide vanes through the adjustment mechanism. The magnitude of V6 can be adjusted by the opening of the corresponding drive mechanism (D1 / D2 / D3 / D7), for example, the drive mechanism is an electromagnetic proportional valve or a servo valve.

[0073] Other equipment can be added to the second branch, along with corresponding movable dampers that are adjusted by a drive mechanism.

[0074] The above description only discloses specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or modifications that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-functional integrated ventilation and cooling system for rail vehicles, characterized in that, The system includes: A cooling device includes a radiator and a cooling fan. The radiator is located at the rear end of the cooling fan. The water inlet of the radiator is connected to the water outlet of the converter, and the water outlet of the radiator is connected to the water inlet of the converter through a water pump. The front end refers to the air inlet side of the cooling fan, and the rear end refers to the air outlet side of the cooling fan. The air duct has a first end connected to the air outlet of the cooling fan, and a second end divided into a first branch and a second branch. The first branch has multiple first air outlets, each of which is connected to a different traction motor. The second branch has multiple second air outlets, each of which is connected to a power supply device. Each branch corresponding to a second air outlet and the second branch are equipped with a movable damper that is adjusted by a drive mechanism D. The control device is configured to control the airflow of the cooling fan based on the heat dissipation of the inverter, the outlet air temperature of the cooling fan, and the ambient temperature; the formula for calculating the airflow of the cooling fan is: Where V is the airflow of the cooling fan, Q is the heat dissipation of the inverter, and C1 is the specific heat constant of air. t1 is the air density, t2 is the outlet air temperature, and t2 is the ambient temperature. The cooling control of the converter is achieved by controlling the flow rate of the cooling medium in the cooling medium circuit based on the heat dissipation of the converter and the temperatures of the converter's inlet and outlet; the formula for calculating the flow rate of the cooling medium is: Where q is the flow rate of the cooling medium, C2 is the specific heat constant of the cooling medium, T1 is the inlet temperature of the converter, and T2 is the outlet temperature of the converter. And according to different power supply modes of the vehicle, the opening and closing of the movable dampers are adjusted by controlling each drive mechanism to achieve cooling control of the traction motor and various power supply equipment; the specific implementation process is as follows: In pantograph-catenary power supply mode, the movable damper is controlled by controlling the drive mechanism, and only the traction motors are cooled; In the internal combustion engine power supply mode, the movable damper is controlled by controlling the drive mechanism to cool each traction motor, generator and diesel engine compartment; In battery-powered mode, the moving damper is controlled by the control drive mechanism to cool the traction motor and battery pack.

2. The multi-functional integrated ventilation and cooling system for rail vehicles according to claim 1, characterized in that: At the intersection of the first branch and the second branch, there is a guide vane and an adjustment mechanism for driving the guide vane to deflect. The control device is further configured to control the operation of the adjustment mechanism according to the heat dissipation requirements of each traction motor and each power supply device, thereby adjusting the deflection angle of the guide vanes to achieve air volume distribution of the first branch and the second branch, so as to meet the heat dissipation requirements of each traction motor and each power supply device.

3. The multi-functional integrated ventilation and cooling system for rail vehicles according to claim 1, characterized in that: A filter device is also provided at the front end of the cooling fan, which is used to filter the air entering the cooling fan.

4. The multi-functional integrated ventilation and cooling system for rail vehicles according to claim 1, characterized in that: When the radiator is located at the rear end of the cooling fan, a fixed damper is installed between the radiator and the cooling fan to supply air to the electrical room, thereby achieving ventilation, cooling and positive pressure design of the electrical room.

5. The multi-functional integrated ventilation and cooling system for rail vehicles according to any one of claims 1 to 4, characterized in that: The power supply equipment includes a generator, a diesel engine room, and a battery pack.

6. The multi-functional integrated ventilation and cooling system for rail vehicles according to claim 5, characterized in that: On the second branch, a first movable damper adjusted by a first drive mechanism D1 and a fourth movable damper adjusted by a fourth drive mechanism D4 are sequentially provided; a second air outlet between the first movable damper and the second movable damper is connected to a generator, and a fifth movable damper adjusted by a fifth drive mechanism D5 is provided on the branch corresponding to the second air outlet; a second air outlet between the second movable damper and the third movable damper is connected to a diesel engine room, and a sixth movable damper adjusted by a sixth drive mechanism D6 is provided on the branch corresponding to the second air outlet; a second air outlet between the third movable damper and the fourth movable damper is connected to a battery pack, and a seventh movable damper adjusted by a seventh drive mechanism D7 is provided on the branch corresponding to the second air outlet.

7. A control method for a multi-functional integrated ventilation and cooling system for rail vehicles as described in any one of claims 1 to 6, characterized in that, The method includes: The heat dissipation of the converter, the outlet air temperature of the cooling fan, and the ambient temperature are obtained, and the operation of the cooling fan is controlled based on the heat dissipation of the converter, the outlet air temperature of the cooling fan, and the ambient temperature, thereby controlling the air volume of the cooling fan. The temperature of the converter inlet and outlet is obtained, and the flow rate of the cooling medium in the cooling medium circuit is controlled according to the heat dissipation of the converter and the temperature of the converter inlet and outlet, so as to realize the cooling control of the converter. The system obtains the vehicle's power supply mode and controls each drive mechanism to adjust the opening and closing of the movable dampers based on the vehicle's power supply mode, thereby achieving cooling control of the traction motor and various power supply equipment.

8. The control method for the multi-functional integrated ventilation and cooling system of rail vehicles according to claim 7, characterized in that, The formula for calculating the air volume of the cooling fan is: Where V is the airflow of the cooling fan, Q is the heat dissipation of the inverter, and C1 is the specific heat constant of air. t1 is the air density, t2 is the outlet air temperature, and t2 is the ambient temperature.

9. The control method for the multi-functional integrated ventilation and cooling system of a rail vehicle according to claim 7, characterized in that, The formula for calculating the flow rate of the cooling medium is: Where q is the flow rate of the cooling medium, C2 is the specific heat constant of the cooling medium, T1 is the inlet temperature of the converter, and T2 is the outlet temperature of the converter.

10. The control method for the multi-functional integrated ventilation and cooling system of a rail vehicle according to any one of claims 7 to 9, characterized in that, The specific process of adjusting the opening and closing of the movable damper by controlling each drive mechanism according to the vehicle's power supply mode is as follows: In pantograph-catenary power supply mode, the first drive mechanism D1 is controlled to move, thereby controlling the first movable damper to close, and only cooling is applied to each traction motor; In the internal combustion engine power supply mode, the first drive mechanism D1, the fifth drive mechanism D5, the second drive mechanism D2 and the sixth drive mechanism D6 are controlled to operate, thereby controlling the opening of the first movable damper, the fifth movable damper, the second movable damper and the sixth movable damper; the third drive mechanism D3 is controlled to operate, thereby controlling the closing of the third movable damper, to cool each traction motor, generator and diesel engine compartment; In battery-powered mode, the first drive mechanism D1, the second drive mechanism D2, the third drive mechanism D3, and the seventh drive mechanism D7 are controlled to operate, thereby controlling the first movable damper, the second movable damper, the third movable damper, and the seventh movable damper to open; the fifth drive mechanism D5, the sixth drive mechanism D6, and the fourth drive mechanism D4 are controlled to operate, thereby controlling the fifth movable damper, the sixth movable damper, and the fourth movable damper to close, thereby cooling the traction motor and the battery pack.

11. A rail vehicle, characterized in that: The vehicle is equipped with a multi-functional integrated ventilation and cooling system for rail vehicles as described in any one of claims 1 to 6.

Images