Air conditioning system of urban railway vehicle

Abstract

The utility model provides an air conditioning system of an urban railway vehicle. An air conditioning unit is provided with two air supply outlets which are arranged in the longitudinal center of a vehicle body at a distance of 1380mm and two air return outlets which are arranged close to the side wall at a distance of 1439mm; the system comprises an air return grille, a static pressure partition plate, an air return opening, a waste discharge device, a built-in profile mounting seat, a flow guide plate, an air duct air inlet, an air distributor, a static pressure partition plate ventilation hole, an air duct air outlet, an air duct sealing strip and an air supply duct, a heat insulation material in a roof air return opening area is thinned, the built-in profile mounting seat is independently arranged, and the minimum length in the vehicle length direction is 190 mm; a ventilation opening is formed in a vertical rib of a built-in profile mounting seat, a flow guide plate is arranged in an air supply duct with an air duct air inlet below the air conditioning unit, and the like, so that an air flowing channel is ensured, the flowing resistance is reduced as much as possible, and it is ensured that air can really, smoothly and rapidly flow; and the designed air conditioning unit finally meets the requirements of fresh air volume and air supply volume.

Description

Technical Field

[0001] The utility model relates to the field of rail vehicle air conditioning systems. Background Art

[0002] As an important subsystem of urban rail vehicles, the air-conditioning system provides the driver's cab and passenger compartment with cold and hot air processed by the air-conditioning units to improve the driving comfort of the driver and passengers. The air-conditioning system involves four types of air flow: fresh air, return air, supply air, and exhaust air. In order to ensure the continuous normal function of the air-conditioning and meet the specific requirements of the contract on the fresh air volume and supply air volume of the air-conditioning, it is generally necessary to reasonably consider the layout of the entire air-conditioning system and verify the actual resistance of these four air flows when designing the air-conditioning for a specific project. In particular, there are many return air and exhaust air in related professional parts in the car. The return air resistance is large, which can easily lead to a reduction in the actual air supply volume of the whole vehicle; poor exhaust can easily lead to a large positive pressure in the passenger compartment, which in turn affects the fresh air intake of the air-conditioning unit and makes it difficult to close the door. Utility Model Content

[0003] There is a convection vortex between the two large-section air supply vents in the passenger compartment, resulting in poor air circulation. If a return air grille is set at the longitudinal center of the vehicle's roof, the air flow will flow horizontally through the entire vehicle before entering the return air vent of the air-conditioning unit near the side wall. The air flow path is long and the resistance is large. Similarly, if the air only relies on natural gaps in the side roof, lamps, side wall panels, etc. for return air, the return air resistance will be even greater. In addition, different projects have more or less wire troughs, cables, interior profile mounting seats, roof slides, etc. that block the exhaust passages, resulting in poor vehicle exhaust.

[0004] The utility model aims to design an air conditioning system for urban railway vehicles to solve the problems of large return air resistance, reduced actual air supply volume of the whole vehicle, poor exhaust, large positive pressure in the passenger compartment, which in turn affects the fresh air intake of the air conditioning unit and difficulty in closing the vehicle doors.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an air-conditioning system for urban railway vehicles, wherein the air-conditioning unit is located at the longitudinal center of the vehicle body, and two air supply outlets with a distance of 1380 mm are arranged, and two air return outlets with a distance of 1439 mm are arranged on the side wall side. The system comprises a return air grille, a static pressure partition, a return air outlet, a waste exhaust device, an interior profile mounting seat, a guide plate, an air duct inlet, an air distributor, a static pressure partition vent, an air duct outlet, an air duct sealing strip and an air supply duct. The air supply duct is fixed to a slide groove reserved on the roof by fasteners and adjustment pads. An air duct inlet is arranged on the upper part of the air supply duct corresponding to the position of the air supply outlet of the air-conditioning unit, and air duct outlets are opened on both sides of the bottom thereof. An air supply grille is arranged at the air duct outlet to allow air to directly enter the passenger compartment, and the air is sealed with the roof structure inside the vehicle through the air duct sealing strip. ; The interior profile mounting seat is located on both sides of the air supply duct of the air conditioner, and the vertical ribs on the interior profile mounting seat are provided with ventilation holes, and the return air grille is arranged under the side top plate outside the door area; the exhaust device is fastened to the roof welded transition duct through fasteners; the static pressure partition is arranged on both sides of the air supply duct throughout the length, and the static pressure partition is provided with static pressure partition ventilation holes, and air distributors are arranged and riveted on both sides of the air supply duct just below the air supply fan of the air conditioning unit, and a guide plate is riveted and fixed in the air supply duct between the two air distributors and between the air inlets of the duct, which guides the air treated by the air conditioning unit blown out by the air supply fan to flow to the static pressure cavities on both sides through the ventilation holes opened on the static pressure partition, so as to avoid it from being collected in the cavity surrounded by the two air distributors and the static pressure partitions on both sides in the main air supply duct.

[0006] Furthermore, the guide plate is an arc transition structure.

[0007] Furthermore, the length of the interior profile mounting seat in the vehicle length direction is 190 mm.

[0008] In view of the newly developed standard subway 80B air-conditioning unit supply and return air type, return air and exhaust grilles with relatively small resistance such as natural gaps and slits are set on the inner ceiling of the passenger compartment, the insulation material in the roof return air outlet area is thinned, and an independent interior profile mounting seat is set with a minimum length of 190mm in the vehicle length direction to avoid blocking the return air duct. The interior profile mounting seat has vertical ribs to open air vents, and a guide plate is set in the air supply duct with an air duct inlet under the air-conditioning unit to ensure the air flow channel, reduce the flow resistance as much as possible, and ensure that the air can really flow smoothly and quickly: the air blown out by the blower enters the static pressure cavity of the air duct, the air in the passenger compartment returns to the air-conditioning unit through the return air duct and return air outlet, and the exhaust gas in the passenger compartment is discharged to the outside of the vehicle through the exhaust duct and exhaust device. After verification by the air-conditioning unit, air duct matching experiments and vehicle air-conditioning experiments, the designed air-conditioning unit finally meets the requirements of fresh air volume and supply air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the air conditioning airflow organization of the vehicle section;

[0010] Figure 2 The diagram is a schematic diagram of the airflow organization of the air duct with an air inlet located on one side of the side wall;

[0011] Figure 3 for Figure 2 Top view of the .

[0012] Figure 1 Main structure: 1. Return air grille; 2. Static pressure partition; 3. Return air outlet; 4. Waste exhaust device; 5. Internal profile mounting base; 6. Wire trough and cable; 7. Guide plate; 8. Duct air inlet; 9. Air distributor; 10. Static pressure partition vent; 11. Duct air outlet; 12. Duct sealing strip; 13. Supply air grille; 14. Transition air tube; 15. Supply air duct.

[0013] Figure 2 and Figure 3 Main structure: 2. Static pressure partition; 7. Guide plate; 8. Air duct inlet; 9. Air distributor; 10. Ventilation hole of static pressure partition; 11. Air duct outlet. DETAILED DESCRIPTION

[0014] Reference Figures 1 to 3 , by setting the return air and exhaust grilles with relatively small resistance such as natural gaps and slits on the inner ceiling of the passenger compartment, the thermal insulation material in the return air outlet area of ​​the roof is thinned, and an internal profile mounting seat 5 is independently set with a minimum length of 190mm in the vehicle length direction to avoid blocking the return air channel, and the internal profile mounting seat 5 has vertical ribs to open air outlets, and a guide plate 7 is set in the air supply duct 15 with the air duct inlet 8 under the air-conditioning unit to ensure the air flow channel, reduce the flow resistance as much as possible, and ensure that the air can really flow smoothly and quickly: the air blown out by the blower enters the static pressure cavity of the air duct, the air in the passenger compartment is returned to the air-conditioning unit through the return air channel and return air outlet 3, and the exhaust gas in the passenger compartment is discharged to the outside of the vehicle through the exhaust channel and exhaust device.

[0015] The latest standard subway 80B air conditioning unit used in urban rail vehicles has two air supply outlets 1380mm apart in the longitudinal center of the vehicle body, and two return air outlets 1439mm apart on the side wall. There are convective vortices between the large-section air inlets set in the passenger compartment, resulting in poor air circulation. If the return air grille 2 is set on the roof of the vehicle at the longitudinal center of the vehicle, the air flow will flow horizontally through the entire vehicle before entering the return air outlet 3 of the air conditioning unit near the side wall. The air flow path is long and the resistance is large; similarly, if the air is only returned through natural gaps in the side roof, lamps, side wall panels, etc., the return air resistance is even greater. In addition, different projects have more or less wire ducts and cables 6, interior profile mounting seats 5, roof slides, etc. blocking the exhaust channel, resulting in poor vehicle exhaust.

[0016] In order to facilitate the return air of the air-conditioning unit, a return air grille 2 with low resistance is set under the side top plate except for the door area; the interior profile mounting seat 5 in the return air outlet 3 area is prohibited from being arranged in the full length direction of the vehicle, and ventilation holes are required in the vertical ribs; in the roof return air outlet 3 and exhaust outlet area, the insulation material ensures that the thickness is reduced under the basic insulation effect to ensure that the air can flow horizontally.

[0017] The air supply duct 15 is fixed to the slide groove reserved on the roof by fasteners, adjustment pads, etc., and an air duct inlet 8 is arranged on the upper part of the air supply duct 15 corresponding to the air supply port position of the air conditioning unit, and air duct outlets 11 are opened on both sides of the bottom thereof. Air supply grilles 13 are arranged at the air duct outlets 11 to allow air to directly enter the passenger compartment and be sealed with the roof structure inside the vehicle through the air duct sealing strip 12. In the large-section air supply duct 15, a guide plate 7 with an arc transition is newly arranged between the two air duct inlets 8 to guide the air treated by the air conditioning unit blown out by the air supply fan to flow to the static pressure cavities on both sides through the static pressure partition ventilation holes 10 opened on the static pressure partition 2. An air distributor 9 is arranged and riveted in the air supply duct 15 directly below the air supply fan of the air conditioning unit, and the guide plate 7 is located in the air supply duct 15 between the two air distributors 9 to prevent the air from being collected in the cavity surrounded by the two air distributors 9 and the static pressure partitions 2 on both sides in the main air supply duct 15.

[0018] The return air grille 1 belongs to the side top plate, which is fixed to the side wall interior with a four-corner key; the interior profile mounting seat 5 is located on both sides of the air-conditioning air supply duct 15, and the vertical ribs on the interior profile mounting seat 5 are provided with ventilation holes; the exhaust device 4 is fastened to the transition air duct 14 (with a mounting flange) welded to the roof through fasteners.

Claims

1. An urban rail vehicle air conditioning system, characterized in that: The air conditioning unit is located at the longitudinal center of the vehicle body with two air supply outlets 1380mm apart and two return air outlets 1439mm apart on the side wall. The system includes a return air grille, a static pressure partition, a return air outlet, a waste exhaust device, an interior profile mounting seat, a guide plate, an air duct inlet, an air distributor, a static pressure partition vent, an air duct outlet, an air duct sealing strip and an air supply duct. The air supply duct is fixed to the slide groove reserved on the roof by fasteners and adjustment pads. The air duct inlet is arranged on the upper part of the air supply duct corresponding to the position of the air supply outlet of the air conditioning unit, and air duct outlets are opened on both sides of the bottom. An air supply grille is arranged at the air duct outlet to allow air to directly enter the passenger compartment and be sealed with the roof structure inside the vehicle through the air duct sealing strip. The interior profile mounting seat is located at On both sides of the air supply duct of the air conditioner, ventilation holes are opened on the vertical ribs of the interior profile mounting seat, and the return air grille is arranged under the side top plate outside the door area; the exhaust device is fastened to the roof welded transition duct by fasteners; the static pressure partition is arranged on both sides of the air supply duct, and the static pressure partition is provided with static pressure partition ventilation holes, and air distributors are arranged and riveted on both sides of the air supply duct directly below the air supply fan of the air conditioning unit, and a guide plate is riveted and fixed in the air supply duct between the two air distributors and between the air inlets of the duct, which guides the air processed by the air conditioning unit blown out by the air supply fan to flow to the static pressure cavities on both sides through the ventilation holes opened on the static pressure partition, so as to avoid it from being collected in the cavity surrounded by the two air distributors and the static pressure partitions on both sides in the main air supply duct.

2. The urban rail vehicle air conditioning system according to claim 1, characterized in that: The guide plate is an arc transition structure.

3. The urban rail vehicle air conditioning system according to claim 1, characterized in that: The length of the interior profile mounting seat in the vehicle length direction is 190 mm.

Images