An on-vehicle cooling system and a control method thereof

Abstract

The present invention discloses a heat dissipation system for a rail vehicle, which includes an air conditioning system, and further includes a first air duct and a first radiator disposed in the first air duct; a second air duct and a second radiator disposed in the second air duct; a rain collection system for collecting rainwater; a cooling pipe for guiding the rainwater collected by the rain collection system and the condensate water of the air conditioning system to the upstream side of the first radiator and / or the second radiator; a heat dissipation loop formed by sequentially connecting the first radiator, the second radiator and the radiators of each heating component; a cooling medium disposed in the heat dissipation loop; and a driving member for driving the cooling medium to flow. Due to the adoption of the above technical solution, compared with the prior art, the present invention rationally organizes the low-temperature air (air conditioner exhaust air), condensate water in the air conditioning system and the rainwater collected on the roof of the vehicle, and fully utilizes the cold sources of each medium to dissipate heat from each radiator, which not only improves the heat dissipation effect of the rail vehicle, but also reduces the energy consumption of the heat dissipation system.

Description

Technical Field

[0001] The present invention relates to the technical field of locomotive heat dissipation, and particularly relates to a heat dissipation system for a rail vehicle and a control method thereof. Background Art

[0002] The heat dissipation system is an important part of a rail vehicle. Its function is to cool and dissipate heat from various heat-generating components (such as the main transformer, main converter cabinet, traction motor, etc.) on the rail vehicle to ensure the safe operation of the rail vehicle. With the rapid development of science and technology, the power and power density of electrical appliances such as transformers, converters, and traction motors on rail vehicles are continuously increasing. Therefore, the required heat dissipation and cooling power are also continuously increasing. If the traditional on-vehicle cooling tower continues to be used, it is difficult to meet the requirements of high-quality locomotives in terms of heat dissipation, volume, weight, noise, etc. Therefore, how to solve the problem of continuously increasing electrical heat generation in locomotives is a technical difficulty that the industry urgently needs to solve. Summary of the Invention

[0003] In order to improve the heat dissipation effect of rail vehicles and reduce energy consumption, the present invention provides a heat dissipation system for rail vehicles, and the specific technical solutions are as follows.

[0004] A heat dissipation system for a rail vehicle is provided, including an air conditioning system, and further including:

[0005] A first air duct, which is provided with a first air inlet and a first air outlet. The first air inlet is communicated with the exhaust pipe of the air conditioning system, and the first air outlet is communicated with the outside of the rail vehicle;

[0006] A first radiator, which is arranged in the first air duct;

[0007] A second air duct, which is provided with a second air inlet and a second air outlet. Both the second air inlet and the second air outlet are communicated with the outside of the rail vehicle;

[0008] A second radiator, which is arranged in the second air duct;

[0009] A rain collection system, which is located at the top of the rail vehicle and is used for collecting rainwater;

[0010] A cooling pipe, which is used to guide the rainwater collected by the rain collection system and the condensate water of the air conditioning system to the upstream side of the first radiator and / or the second radiator;

[0011] A heat dissipation loop, which is sequentially connected by the first radiator, the second radiator, and the radiators of each heat-generating component on the rail vehicle;

[0012] A cooling medium, which is arranged in the heat dissipation loop;

[0013] And a driving member, which is used to drive the cooling medium to flow.

[0014] The above structure rationally organizes the low-temperature air (air conditioner exhaust air), condensate water in the air conditioning system, and rainwater collected on the roof of the vehicle, and makes full use of the cold sources of various media to dissipate heat from each radiator, which not only improves the heat dissipation effect of the rail vehicle but also reduces the energy consumption of the heat dissipation system.

[0015] In some embodiments, the cooling pipe includes a first cooling pipe, a second cooling pipe, a third cooling pipe, and a three-way valve; one end of the first cooling pipe is respectively communicated with the water outlet of the rainwater collection system and the condensate water outlet of the air conditioning system, and the other end is respectively connected to the water inlets of the second cooling pipe and the third cooling pipe through the three-way valve; the water outlet of the second cooling pipe is located on the upwind side of the first radiator, and the water outlet of the third cooling pipe is located on the upwind side of the second radiator.

[0016] By arranging the water outlet of the second cooling pipe on the upwind side of the first radiator and the water outlet of the third cooling pipe on the upwind side of the second radiator, the above structure enables the mixture of condensate water, rainwater, and air to directly contact the first and second radiators, thereby increasing the heat dissipation efficiency.

[0017] In some embodiments, a heat dissipation bypass and a switching member are provided on the heat dissipation loop, and the switching member is used to make the cooling medium flow through the first radiator or flow through the heat dissipation bypass to bypass the first radiator.

[0018] To prevent unfiltered ambient air outside the vehicle from entering the passenger compartment and polluting the air inside the passenger compartment, and to ensure that the passenger compartment door can be opened when the vehicle is parked, in some embodiments, it further includes a controller and a first fan provided in the first air duct, and the controller is used to control the rotation speed of the first fan so that the indoor air pressure of the rail vehicle is slightly higher than the outdoor air pressure of the rail vehicle.

[0019] In some embodiments, it further includes a second fan provided in the second air duct, and the controller is used to control the rotation speed of the second fan so that the heat dissipation system of the rail vehicle meets the heat dissipation requirements of each heating component on the rail vehicle.

[0020] Due to the limited space on the roof of the vehicle, in some embodiments, both the first air duct and the second air duct are provided at the bottom of the rail vehicle.

[0021] On the other hand, a control method for the above rail vehicle heat dissipation system is provided, including the following steps:

[0022] When the air conditioning system is in the cooling mode, drain the liquid in the cooling pipe to the upwind side of the first radiator;

[0023] When the air conditioning system is in the heating mode, drain the liquid in the cooling pipe to the upwind side of the second radiator.

[0024] When the air - conditioning system is in the cooling mode, the temperature of the exhaust gas discharged by the air - conditioner is relatively low. At this time, the exhaust gas discharged by the air - conditioner can be used to cool the cooling medium in the first radiator, and the outside air can be used to cool the cooling medium in the second radiator. Also, since the first radiator is located upstream of the second radiator in the heat - dissipation circuit, the temperature of the cooling medium in the first radiator is higher than that in the second radiator. Therefore, discharging the liquid in the cooling pipe to the upwind side of the first radiator can achieve the best heat - dissipation effect. When the air - conditioning system is in the heating mode, the temperature of the exhaust gas discharged by the air - conditioner is relatively high and is not suitable for heat - dissipation. Therefore, the liquid in the cooling pipe is discharged to the upwind side of the second radiator.

[0025] In some embodiments, when the air - conditioning system is in the cooling mode, the cooling medium in the heat - dissipation circuit flows through the first radiator; when the air - conditioning system is in the heating mode, the cooling medium in the heat - dissipation circuit flows through the heat - dissipation bypass to bypass the first radiator. Since the temperature of the exhaust gas discharged by the air - conditioner is relatively high when the air - conditioning system is in the heating mode and is not suitable for heat - dissipation, the cooling medium in the heat - dissipation circuit is made to flow through the heat - dissipation bypass to bypass the first radiator, thereby cutting off the first radiator.

[0026] In some embodiments, when the air - conditioning system is in the cooling mode, the rotational speed of the second fan is controlled so that the heat - dissipation system of the rail vehicle meets the heat - dissipation requirements of each heat - generating component on the rail vehicle; when the air - conditioning system is in the heating mode, the first fan stops working, and the rotational speed of the second fan is controlled so that the heat - dissipation system of the rail vehicle meets the heat - dissipation requirements of each heat - generating component on the rail vehicle; the first fan is arranged in the first air duct, and the second fan is arranged in the second air duct.

[0027] To prevent the unfiltered ambient air outside the vehicle from entering the passenger compartment and polluting the air inside the passenger compartment, and to ensure that the passenger - compartment door can be opened when the vehicle is parked, in some embodiments, when the air - conditioning system is in the cooling mode, if the speed of the rail vehicle < 5 KM / H, the first fan stops working; if the speed of the rail vehicle ≥ 5 KM / H, the rotational speed of the first fan is controlled so that the indoor air pressure of the rail vehicle is slightly higher than the outdoor air pressure of the rail vehicle.

[0028] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0029] 1. By reasonably organizing the low - temperature air (air - conditioner exhaust air), condensate water, and rainwater collected on the roof in the air - conditioning system, and making full use of the cold sources of each medium to dissipate heat for each radiator, not only the heat - dissipation effect of the rail vehicle is improved, but also the energy consumption of the heat - dissipation system is reduced.

[0030] 2. By making the mixture of condensate water, rainwater and air directly contact with the first and second radiators, the heat - dissipation efficiency is increased.

[0031] 3. By controlling the rotation speed of the first fan, the indoor air pressure of the rail vehicle is made slightly higher than the outdoor air pressure of the rail vehicle, preventing the unfiltered ambient wind outside the vehicle from entering the passenger compartment and polluting the air inside the passenger compartment, and ensuring that the passenger compartment door can be opened when the vehicle is stopped. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of a rail vehicle cooling system in the refrigeration mode in an embodiment of the present application;

[0033] Figure 2 It is a schematic structural diagram of a rail vehicle cooling system in the heating mode in an embodiment of the present application. Detailed Embodiments

[0034] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0035] Embodiment 1

[0036] Refer to Figure 1 and Figure 2 , a rail vehicle cooling system, including an air conditioning system, further including:

[0037] The first air duct 1 is provided at the bottom of the rail vehicle, and it is provided with a first air inlet and a first air outlet. The first air inlet is communicated with the exhaust pipe of the air conditioning system, and the first air outlet is communicated with the outside of the rail vehicle;

[0038] The first radiator 2 is provided in the first air duct 1;

[0039] The second air duct 3 is provided at the bottom of the rail vehicle, and it is provided with a second air inlet and a second air outlet. Both the second air inlet and the second air outlet are communicated with the outside of the rail vehicle;

[0040] The second radiator 4 is provided in the second air duct 3;

[0041] The rain collection system is located at the top of the rail vehicle and is used for collecting rainwater;

[0042] The cooling pipe includes a first cooling pipe 51, a second cooling pipe 52, a third cooling pipe 53 and a three-way valve 54; one end of the first cooling pipe 51 is respectively communicated with the water outlet of the rain collection system and the condensate water outlet of the air conditioning system, and the other end is respectively connected to the water inlets of the second cooling pipe 52 and the third cooling pipe 53 through the three-way valve 54; the water outlet of the second cooling pipe 52 is located on the upwind side of the first radiator 2, and the water outlet of the third cooling pipe 53 is located on the upwind side of the second radiator 4. Here, the upwind side refers to the side where the wind blows towards the object.

[0043] A heat dissipation circuit is formed by sequentially connecting the first radiator 2, the second radiator 4, and the radiators 6 of each heat-generating component on the rail vehicle. A heat dissipation bypass 7 and a switching member 71 are provided on the heat dissipation circuit. The switching member 71 is used to make the cooling medium flow through the first radiator 2 or flow through the heat dissipation bypass 7 to bypass the first radiator 2. In this embodiment, the switching member 71 is a three-way valve provided at both ends of the first radiator 2.

[0044] A cooling medium is provided inside the heat dissipation circuit;

[0045] A driving member 8 is used to drive the flow of the cooling medium. In this embodiment, the driving member 8 is a water pump.

[0046] A first fan 9 is provided inside the first air duct 1;

[0047] A second fan 10 is provided inside the second air duct 3;

[0048] A controller is used to control the rotation speed of the first fan 9 so that the indoor air pressure of the rail vehicle is slightly higher than the outdoor air pressure of the rail vehicle; and is used to control the rotation speed of the second fan 10 so that the heat dissipation system of the rail vehicle meets the heat dissipation requirements of each heat-generating component on the rail vehicle.

[0049] In this embodiment, the rotation speed of the first fan 9 is controlled by the following method to make the indoor air pressure of the rail vehicle slightly higher than the outdoor air pressure of the rail vehicle: Pressure sensors are arranged inside and outside the vehicle to obtain the indoor and outdoor pressures of the rail vehicle. By controlling the rotation speed of the first fan 9, the indoor air pressure of the rail vehicle is made slightly higher than the outdoor air pressure of the rail vehicle, that is, when the indoor air pressure is lower than the outdoor air pressure, the rotation speed of the first fan 9 is reduced until the indoor air pressure is slightly higher than the outdoor air pressure.

[0050] In this embodiment, the rotation speed of the second fan 10 is controlled by the following method to make the heat dissipation system of the rail vehicle meet the heat dissipation requirements of each heat-generating component on the rail vehicle: A temperature sensor is arranged on the heat dissipation circuit between the second radiator 4 and the radiators 6 of each heat-generating component on the rail vehicle to obtain the outlet temperature T1 of the second radiator 4. By controlling the rotation speed of the second fan 10, T1 ≤ T2 is achieved, where T2 is the maximum temperature of the cooling medium required by the heat-generating component. When T1 > T2, the rotation speed of the second fan 10 is increased to make T1 ≤ T2.

[0051] Embodiment 2

[0052] A control method for the heat dissipation system of the rail vehicle in Embodiment 1 includes the following steps:

[0053] When the air-conditioning system is in the cooling mode, drain the liquid in the cooling pipe to the upwind side of the first radiator, and make the cooling medium in the heat dissipation loop flow through the first radiator; control the rotational speed of the second fan so that the rail vehicle cooling system meets the heat dissipation requirements of each heat-generating component on the rail vehicle, such as Figure 1 as shown. At this time, if the vehicle speed of the rail vehicle < 5 KM / H, stop the first fan; if the vehicle speed of the rail vehicle ≥ 5 KM / H, control the rotational speed of the first fan so that the indoor air pressure of the rail vehicle is slightly higher than the outdoor air pressure of the rail vehicle.

[0054] When the air-conditioning system is in the heating mode, drain the liquid in the cooling pipe to the upwind side of the second radiator, and make the cooling medium in the heat dissipation loop flow through the heat dissipation bypass to bypass the first radiator; stop the first fan, and control the rotational speed of the second fan so that the rail vehicle cooling system meets the heat dissipation requirements of each heat-generating component on the rail vehicle. Such as Figure 2 as shown.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An orbital vehicle cooling system, comprising an air conditioning system, characterized in that, It further includes: A first air duct, which is provided with a first air inlet and a first air outlet. The first air inlet is communicated with the exhaust pipe of the air-conditioning system, and the first air outlet is communicated with the outside of the rail vehicle; A first radiator, which is arranged in the first air duct; A second air duct, which is provided with a second air inlet and a second air outlet. Both the second air inlet and the second air outlet are communicated with the outside of the rail vehicle; A second radiator, which is arranged in the second air duct; A rain collection system, which is located on the top of the rail vehicle and is used for collecting rainwater; A cooling pipe, which is used for guiding the rainwater collected by the rain collection system and the condensed water of the air-conditioning system to the upstream side of the first radiator and / or the second radiator; A heat dissipation loop, which is sequentially connected by the first radiator, the second radiator and the radiators of each heating component on the rail vehicle; A cooling medium, which is arranged in the heat dissipation loop; And a driving member, which is used for driving the cooling medium to flow; A heat dissipation bypass and a switching member are arranged on the heat dissipation loop, and the switching member is used for enabling the cooling medium to flow through the first radiator or flow through the heat dissipation bypass to bypass the first radiator.

2. The rail vehicle cooling system according to claim 1, characterized in that: The cooling pipe includes a first cooling pipe, a second cooling pipe, a third cooling pipe and a three-way valve; one end of the first cooling pipe is respectively communicated with the water outlet of the rain collection system and the condensed water outlet of the air-conditioning system, and the other end is respectively connected with the water inlets of the second cooling pipe and the third cooling pipe through the three-way valve; the water outlet of the second cooling pipe is located on the upstream side of the first radiator, and the water outlet of the third cooling pipe is located on the upstream side of the second radiator.

3. The rail vehicle cooling system according to claim 1 or 2, characterized in that, It further includes a controller and a first fan arranged in the first air duct. The controller is used for controlling the rotation speed of the first fan so that the indoor air pressure of the rail vehicle is slightly higher than the outdoor air pressure of the rail vehicle.

4. The heat dissipation system for a rail vehicle according to claim 3, characterized in that, It further includes a second fan arranged in the second air duct. The controller is used for controlling the rotation speed of the second fan so that the heat dissipation system of the rail vehicle meets the heat dissipation requirements of each heating component on the rail vehicle.

5. The rail vehicle cooling system according to claim 1 or 2, characterized in that: Both the first air duct and the second air duct are arranged at the bottom of the rail vehicle.

6. A control method for the heat dissipation system of a rail vehicle according to any one of claims 1-5, including the following steps: When the air-conditioning system is in the cooling mode, discharge the liquid in the cooling pipe to the upstream side of the first radiator; When the air-conditioning system is in the heating mode, discharge the liquid in the cooling pipe to the upstream side of the second radiator.

7. According to the control method for the heat dissipation system of a rail vehicle described in claim 6, it is characterized in that: When the air-conditioning system is in the cooling mode, enable the cooling medium in the heat dissipation loop to flow through the first radiator; When the air-conditioning system is in the heating mode, enable the cooling medium in the heat dissipation loop to flow through the heat dissipation bypass to bypass the first radiator.

8. According to the control method for the heat dissipation system of a rail vehicle described in claim 7, it is characterized in that: When the air-conditioning system is in the cooling mode, control the rotation speed of the second fan so that the heat dissipation system of the rail vehicle meets the heat dissipation requirements of each heating component on the rail vehicle; When the air-conditioning system is in the heating mode, stop the first fan from working and control the rotational speed of the second fan so that the heat dissipation system of the rail vehicle can meet the heat dissipation requirements of each heat-generating component on the rail vehicle; The first fan is arranged in the first air duct, and the second fan is arranged in the second air duct.

9. The control method of the heat dissipation system of the rail vehicle according to claim 7 or 8, wherein: When the air-conditioning system is in the cooling mode, If the speed of the rail vehicle < 5 KM / H, stop the first fan from working; If the speed of the rail vehicle ≥ 5 KM / H, control the rotational speed of the first fan so that the indoor air pressure of the rail vehicle is slightly higher than the outdoor air pressure of the rail vehicle.

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