Railway vehicle on-board emergency inverter high-efficiency heat dissipation system

Abstract

A kind of high-efficiency heat dissipation system of rail vehicle on-board emergency inverter, including box, the partition is installed in the box, the side of the back plate of the box opposite to the partition has opening, and the partition and the back plate and two side plates of the box jointly define a containing space, the containing space has air inlet and air outlet;Fan is installed in the containing space side close to air inlet, and radiator is installed in the side opposite to the back plate of the box, wherein the part of the radiator exposed opening is used to install emergency inverter assembly;The utility model can improve the heat dissipation efficiency of on-board emergency inverter without expanding the volume of existing on-board emergency inverter box, improve the power volume ratio (the ratio of maximum power and overall volume) of emergency inverter, ensure that emergency inverter is stably operated in high-power state.

Description

Technical Field

[0001] This utility model relates to a vehicle-mounted emergency inverter heat dissipation system, and more particularly to a high-efficiency heat dissipation system for a rail vehicle-mounted emergency inverter. Background Technology

[0002] Currently, when the main power supply of the subway car is normal, the air conditioning system starts to dissipate heat. However, in the event of a main power supply failure, an onboard emergency ventilation inverter is required to convert the DC96V battery power to AC380V / 50Hz for emergency ventilation inside the car in the tunnel.

[0003] There are two types of heat dissipation methods for emergency ventilation and emergency inverters: active heat dissipation and passive heat dissipation. Passive heat dissipation emergency inverters rely solely on natural cooling, while active heat dissipation emergency inverters can only achieve cooling through airflow circulation inside the enclosure.

[0004] Existing emergency ventilation inverters suffer from low heat dissipation efficiency, poor heat dissipation, and energy waste, easily squandering valuable battery power. Prolonged operation at full power can easily lead to overheating protection failures. Due to their low heat dissipation efficiency, emergency ventilation inverters cannot operate at maximum power. Summary of the Invention

[0005] This utility model provides a high-efficiency heat dissipation system for an on-board emergency inverter in rail vehicles. Without increasing the volume of the existing on-board emergency inverter enclosure, it can improve the heat dissipation efficiency of the on-board emergency inverter, increase the power-to-volume ratio (the ratio of maximum power to overall volume) of the emergency inverter, and ensure that the emergency inverter operates stably at high power.

[0006] A high-efficiency heat dissipation system for an on-board emergency inverter of a rail vehicle includes a housing. A partition is installed inside the housing. The partition has an opening on one side facing the back panel of the housing. The partition, together with the back panel and two side panels of the housing, defines an accommodating space. The accommodating space has an air inlet and an air outlet. A fan is installed on the side of the accommodating space near the air intake, and a radiator is installed on the side facing the back panel of the enclosure. The exposed portion of the radiator is used to install an emergency inverter assembly.

[0007] The partition is welded to the back panel and two side panels of the box, and the weld seam is coated with a sealant layer. The radiator and fan are connected to the partition by bolts, and the joint between the radiator and the partition is coated with a sealant layer. The accommodating space is also equipped with a temperature sensor and a controller. The temperature sensor is fixedly mounted on the heat sink, and the controller is fixedly connected to the inner wall of the partition. The controller is communicatively connected to the temperature sensor and the fan.

[0008] Furthermore, the air inlet and air outlet are located on opposite sides of the accommodating space, with the air inlet located on one of the side plates constituting the accommodating space and the air outlet located on the back plate constituting the accommodating space.

[0009] Furthermore, the air inlet is honeycomb-shaped, and the air outlet is elongated.

[0010] Furthermore, the emergency inverter assembly is connected to the heat sink by bolts, and a silver-based thermally conductive silicone grease layer is provided between the contact surfaces.

[0011] Furthermore, the bottom of the partition is connected to the bottom plate of the box by welding, and the weld is coated with a sealant layer.

[0012] The beneficial effects of this utility model are as follows: This invention can improve the heat dissipation efficiency of vehicle-mounted emergency inverters and increase the power-to-volume ratio (the ratio of maximum power to overall volume) of emergency inverters without increasing the volume of existing vehicle-mounted emergency inverter enclosures, thus ensuring that emergency inverters operate stably at high power. Attached Figure Description

[0013] Figure 1 This is a schematic block diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the separator of this utility model; Figure 3 This is a schematic diagram showing the connection relationship between the separator and the back plate of this utility model; Figure 4 This is a schematic diagram showing the connection between the partition and the housing.

[0014] In the diagram, 1-box body; 2-partition; 3-back panel; 4-side panel; 5-bottom plate; 6-fan; 7-heat sink; 8-opening; 9-air inlet; 10-air outlet; 11-temperature sensor; 12-controller. Detailed Implementation

[0015] like Figure 1-4 As shown, a high-efficiency heat dissipation system for an on-board emergency inverter of a rail vehicle includes a housing 1. A partition 2 is installed inside the housing 1. The partition 2 has an opening 8 on one side facing the back plate 3 of the housing 1. The partition 2, together with the back plate 3 and two side plates 4 of the housing 1, defines an independent accommodating space. Specifically, the partition 2 is welded to the back plate 3 and the two side plates 4 of the enclosure 1. To improve stability, the bottom of the partition 2 can also be welded to the bottom plate 5 of the enclosure 1. To improve airtightness and waterproofness, a sealant layer needs to be applied to the weld seam to prevent moisture and dust from entering the enclosure 1 where the emergency inverter and other electrical components are installed. The accommodating space has an air inlet 9 and an air outlet 10, wherein the air inlet 9 and the air outlet 10 are respectively located on both sides of the accommodating space, wherein the air inlet 9 is provided on one of the side plates 4 constituting the accommodating space, and the air outlet 10 is provided on the back plate 3 constituting the accommodating space; in this embodiment, the air inlet 9 is honeycomb-shaped, and the air outlet 10 is set to be elongated, but not limited to this order. A fan 6 is installed on the side of the accommodating space near the air inlet 9, and a heat sink 7 is installed on the side facing the back plate 3 of the housing 1. The heat sink 7 is existing technology and specifically includes a base plate and heat dissipation teeth fixedly connected to the base plate. The part of the base plate of the heat sink 7 with the exposed opening 8 is used to install the emergency inverter assembly. The emergency inverter assembly and the heat sink 7 are connected by bolts. In order to improve the heat conduction efficiency, a silver-based thermal conductive grease layer should be provided between the contact surfaces. After the fan 6 is turned on, the airflow enters through the air inlet 9 and flows through the heat dissipation teeth of the heat sink 7, dissipating the heat generated by the emergency inverter component through the air outlet 10, ensuring the stable operation of the emergency inverter component. The accommodating space is also equipped with a temperature sensor 11 and a controller 12. The temperature sensor 11 is fixedly mounted on the heat sink 7, and the controller 12 is fixedly connected to the inner wall of the partition 2. The controller 12 is communicatively connected to the temperature sensor 11 and the fan 6. The temperature sensor 11 is used to detect the temperature on the heat sink 7 and send it to the controller 12. The controller 12 receives the temperature and generates a control command to the fan 6. The specific control logic is as follows: when the temperature of the heat sink 7 is below 40°C, natural air cooling is performed; when the temperature of the heat sink is above 40°C, forced air cooling is performed (i.e., the fan 6 is started); when the temperature of the heat sink is above 85°C, the main circuit is shut down for protection, and the emergency inverter is restarted when the temperature drops to 65°C.

[0016] The heat dissipation system provided by this utility model combines heat dissipation efficiency and waterproof performance, and does not require changes to the shape of the housing 1. It is very suitable for retrofitting existing equipment. The heat dissipation system is installed in a separate space, and all seams are sealed with adhesive, which isolates the heat dissipation fins from the interior of the housing 1. The heat generated by the inverter mechanism is efficiently conducted to the fins through the thermally conductive adhesive heat sink and exchanges heat with the outside environment. Furthermore, dust and moisture in the airflow of the heat dissipation system will not enter the housing 1 containing the equipment, and will not cause damage to the equipment.

Claims

1. A high-efficiency heat dissipation system for an onboard emergency inverter in a rail vehicle, comprising a housing, characterized in that, The box is equipped with a partition, which has an opening on one side facing the back panel of the box. The partition, together with the back panel and the two side panels of the box, defines an accommodating space with an air inlet and an air outlet. A fan is installed on the side of the accommodating space near the air intake, and a heat sink is installed on the side facing the back panel of the enclosure. The exposed part of the heat sink is used to install the emergency inverter assembly. The partition is welded to the back panel and two side panels of the box, and the weld seam is coated with a sealant layer. The radiator and fan are connected to the partition by bolts, and the joint between the radiator and the partition is coated with a sealant layer. The accommodating space is also equipped with a temperature sensor and a controller. The temperature sensor is fixedly mounted on the heat sink, and the controller is fixedly connected to the inner wall of the partition. The controller is communicatively connected to the temperature sensor, the fan, and the main circuit breaker of the emergency inverter.

2. The high-efficiency heat dissipation system for an on-board emergency inverter in a rail vehicle according to claim 1, characterized in that, The air inlet and air outlet are located on opposite sides of the accommodating space, with the air inlet located on one of the side plates constituting the accommodating space and the air outlet located on the back plate constituting the accommodating space.

3. The high-efficiency heat dissipation system for an on-board emergency inverter in a rail vehicle according to claim 2, characterized in that, The air inlet is honeycomb shaped, and the air outlet is elongated.

4. The high-efficiency heat dissipation system for an on-board emergency inverter in a rail vehicle according to claim 1, characterized in that, The emergency inverter assembly is connected to the heat sink by bolts, and a silver-based thermally conductive silicone grease layer is provided between the contact surfaces.

5. The high-efficiency heat dissipation system for an on-board emergency inverter in a rail vehicle according to claim 1, characterized in that, The bottom of the separator is connected to the bottom plate of the box by welding, and the weld is coated with a sealant layer.

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