CN204415407U - Ultrathin air conditioner group and be provided with the city rail vehicle of this air-conditioner set - Google Patents

Abstract

The utility model relates to an ultra-thin air-conditioning unit and an urban rail vehicle equipped with the air-conditioning unit. There are two sets of independent cooling and heating systems, and the two sets of cooling and heating systems are arranged in a symmetrical structure. Each cooling and heating system includes two compressors, two condensers, two evaporators, two expansion valves, and two An evaporating fan, a condensing fan and two electric heaters, each cooling and heating system is equipped with a set of controllers, and the controllers are integrated and installed in the housing. The utility model is compact in structure, reasonable in layout, adopts electromechanical integration design, integrates the controller in the casing of the air conditioning unit, omits the separate air conditioning control cabinet in the existing urban rail vehicle technology, and saves the space inside the vehicle.

Description

Ultra-thin air-conditioning unit and urban rail vehicle equipped with the air-conditioning unit

technical field

The utility model relates to an air-conditioning unit, in particular to an ultra-thin air-conditioning unit installed on an urban rail vehicle, and at the same time relates to an urban rail vehicle equipped with the air-conditioning unit, belonging to the technical field of rail vehicle air conditioning.

Background technique

In urban rail vehicles, each passenger compartment is generally equipped with one or two air-conditioning units, and each air-conditioning unit adopts a unit structure and is installed on the roof of the vehicle as a whole. The air conditioner unit is connected to the air supply port and the return air port in the car through the air supply duct and the return air duct. It enters the air conditioning unit through the air return port, mixes with the fresh air, and then exchanges heat with the evaporator to complete the refrigeration cycle.

For existing rail vehicles, each carriage will also be equipped with a control cabinet. The electrical components are integrated in the control cabinet, and the control cabinet centrally controls the work of the air conditioning unit. The control cabinet is generally installed independently in the passenger room. The air conditioning unit and the control cabinet The electrical wiring between them is very complicated and takes up a lot of space.

In addition, for the air-conditioning unit installed on the roof, the air supply duct is generally installed in the space above the roof panel, and is arranged in the central area of the roof along the length of the car body. An air supply port is provided to supply air to the passenger room, and a static pressure air duct is also provided below the air supply duct. In order to facilitate the uniform air distribution in the car, in some rail vehicles, in addition to the air supply duct in the center of the roof, there are also side roof air supply ducts at the side roofs on both sides of the passenger compartment, and correspondingly at the position of the side roof. Set the air outlet.

Some rail vehicles are limited by vehicle space and boundaries. In the case of large cooling capacity requirements, the height of the air-conditioning unit is limited. On the premise of ensuring the interior height space of the passenger compartment, there is not enough space above the ceiling in the passenger compartment to arrange the air-conditioning control cabinet and Air-conditioning duct. However, in the air-conditioning duct system in the prior art, since the air supply duct and the static pressure duct are installed in the space above the roof panel, the overall height of the vehicle is increased, which cannot meet the limit requirements of the vehicle height, and takes up Greater headroom. In addition, the air-conditioning air duct system in the prior art is equipped with a central air supply duct, a static pressure air duct and a side top air supply duct, which has a complex structure, which not only increases the number and weight of the air ducts, but also indirectly increases the The weight of the vehicle body cannot meet the requirements of light weight of the vehicle body, and it also increases the material cost of the air duct and the difficulty of installation and fixation.

Utility model content

The main purpose of the utility model is to solve the above-mentioned problems and deficiencies, and provide an ultra-thin air-conditioning unit with compact structure, reasonable layout, and saving the interior space of the vehicle and an urban rail vehicle equipped with the air-conditioning unit.

In order to achieve the above object, the technical solution of the utility model is:

An ultra-thin air-conditioning unit, including a shell, and an air supply port and an air return port are opened on the bottom wall of the shell. It is characterized in that: two sets of independent cooling and heating systems are installed in the shell, two The cooling and heating system is arranged in a symmetrical structure. Each cooling and heating system includes two compressors, two condensers, two evaporators, two expansion valves, two evaporating fans, one condensing fan and two electric heaters , each cooling and heating system is equipped with a set of controllers, and the controllers are integrated and installed in the housing.

Further, two compressors in each refrigeration and heating system are connected in parallel to form a compressor unit, and the two condensers are connected in parallel to the exhaust port of the compressor unit, and the outlet of each condenser is connected to an expansion valve, and the expansion valve The outlet of the valve is connected to the inlet of one evaporator, and the outlets of the two evaporators are connected in parallel to the inlet of the compressor unit.

Further, the housing is divided into two indoor cavities and two outdoor cavities, the two outdoor cavities are installed side by side in the middle, and the two indoor cavities are respectively arranged on both sides of the two outdoor cavities. Two compressors, two condensers and a condensing fan are installed in the outdoor cavity, and two evaporators, two expansion valves, two evaporating fans and two electric heaters are installed in each of the indoor cavities.

Further, the two electric heaters, the two evaporators and the two evaporating fans are arranged parallel and symmetrically from the center of the car body to both sides in the width direction of the car body, and the two electric heaters are located in the middle, and are arranged sequentially on both sides The evaporator and the evaporating fan.

Further, the two air supply ports are arranged on both sides of the casing in the vehicle width direction, and the air return port is arranged in the middle of the two air supply ports.

Further, new air outlets are opened on the end walls of the front and rear ends of the housing.

Further, the controller is installed in the area above the return air outlet.

Another technical scheme of the utility model is:

An urban rail vehicle is characterized in that it includes the above-mentioned ultra-thin air-conditioning unit, and the air-conditioning unit is fixedly installed on the steel structure of the car body on the roof.

Further, the cavity between the side roof and/or middle roof in the passenger compartment and the steel structure of the car body is enclosed to form a closed space as an air supply duct, and air supply air ducts are provided on the corresponding side roof and/or middle roof to deliver air to the passenger compartment. The air supply port in the car and the air return port in the car, the air supply port of the air conditioning unit and the air supply port in the car are all connected with the air supply duct, and the return air port in the car is connected to the air conditioning unit through the return air duct. The return air outlet is connected.

Further, corresponding to the air supply port and the air return port of the air conditioning unit, openings are respectively provided on the steel structure of the car body, and the two openings are respectively communicated with the air supply duct and the return air duct, surrounding the air supply duct. The tuyeres and/or return air outlets and the corresponding openings are respectively provided with an annular groove, and a ring of sealing gaskets are respectively installed in the two annular grooves, and the two annular grooves are staggered from each other. One edge acts as an annular protrusion to press against a gasket in the other annular groove to achieve sealing.

In summary, the utility model provides an ultra-thin air-conditioning unit and an urban rail vehicle equipped with the air-conditioning unit, which have the following advantages compared with the prior art:

(1) The utility model has a compact structure and a reasonable layout. It adopts a mechatronic design and integrates the controller in the housing of the air-conditioning unit, omitting the separate air-conditioning control cabinet in the existing urban rail vehicle technology, and saving the space inside the vehicle. .

(2) The utility model adopts two sets of independent refrigeration and heating systems, and the two systems are independently controlled by their own controllers to realize multiple sets of refrigeration and heating adjustments, and the air supply ports are arranged on both sides of the bottom wall of the air conditioning unit, which is consistent with the The air supply duct above the side roof matches.

(3) In the utility model, the controller is installed in the area above the air return port, which has good heat dissipation and can effectively prolong the working life of the electrical components.

(4) Use the space above the roof of the passenger compartment of the vehicle as the air supply duct of the air-conditioning ventilation system, and rationally use the top space of the interior to solve the problem that the air supply duct cannot be arranged on the top of the passenger compartment. At the same time, a separate air duct structure can be omitted. The cavity between the roof and the car body is installed inside for air supply, which reduces weight and saves costs, and can reduce the height between the roof and the car body, thereby reducing the height of the vehicle to meet the requirements of the vehicle limit.

Description of drawings

Fig. 1 is the structural representation of urban rail vehicle of the present utility model;

Fig. 2 is a structural schematic diagram of the utility model air-conditioning unit;

Figure 3 is a side view of Figure 2;

Fig. 4 is the back view of Fig. 2;

Fig. 5 is a schematic diagram of the internal structure of the air conditioning unit of the present invention;

Fig. 6 is a schematic diagram of the cross-sectional structure of the vehicle body of the present utility model;

Fig. 7 is a schematic diagram of the installation structure of the built-in roof of the utility model;

Fig. 8 is a structural schematic diagram of the utility model air supply box;

Fig. 9 is a structural schematic diagram of the slit-shaped air supply port in the vehicle of the present invention;

Fig. 10 is a schematic diagram of the sealing structure of the air supply port of the present invention.

As shown in Figures 1 to 10, a vehicle body 1, a vehicle door 2, a vehicle window 3, an air-conditioning unit 4, a waste discharge device 5, a housing 6, an indoor chamber 7, an outdoor chamber 8, a drain tank 9, an air supply box 10, Air outlet 11, interior air supply port 12, interior air return port 13, condensation air inlet 14, condensation air outlet 15, air supply port 16, air return port 17, side wall panel 18, floor 19, side roof plate 20, middle roof plate 21, Air supply duct 22, car body steel structure 23, roof frame 24, mounting seat 25, side wall frame 26, line pipe 27, connector 28, side roof with lamp body 29, return air duct 30, transition plate 31, Bolts 32, bolts 33, hinges 34, partitions 35, interior air outlets 36, evaporators 37, evaporation fans 38, electric heaters 39, condensers 40, condensing fans 41, compressors 42, fresh air outlets 43, connectors 44, hinge 45, beam 46, first annular groove 47, first gasket 48, second annular groove 49, second gasket 50, first sealing strip 51, second sealing strip 52, bottom wall 53 .

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Embodiment one:

As shown in Fig. 1, the utility model provides an urban rail vehicle, which includes a car body 1, and a car door 2, a car window 3, etc. are arranged on the side wall of the car body 1. In order to adjust the ambient temperature and humidity in the compartment, an air-conditioning and ventilation system is installed on the urban rail vehicle. The air-conditioning and ventilation system provided by the utility model includes an air-conditioning unit 4 and a waste discharge device 5, and the air-conditioning unit 4 and the waste discharge device 5 are fixedly installed on the On the car body steel structure 23 at the top of the car body 1 , there are two sets of waste discharge devices 5 , which are located on both sides of the air conditioning unit 4 .

As shown in Figure 2, in order to reduce the height of the vehicle, the air conditioner unit 4 adopts an ultra-thin unit structure and is installed under the roof to reduce the overall height of the vehicle and meet special boundary requirements. The air conditioning unit 4 is fixedly installed on the vehicle body steel structure 23 at the top of the vehicle body 1 through a plurality of mounting seats 25 , and a shock absorber is arranged between the mounting seats 25 and the vehicle body steel structure 23 .

As shown in Figures 2 to 5, in this embodiment, in order to meet the cooling capacity demand in the passenger room, two sets of independent cooling and heating systems are installed in the housing 6 of the air conditioning unit 4, and the two sets of independent cooling and heating systems The systems are arranged side by side in a symmetrical structure, which not only simplifies the roof structure and installation process, but also realizes full cooling (both sets of refrigeration systems work), semi-cooling (only one set of refrigeration systems works) according to the difference between the temperature of the passenger compartment and the set temperature. system work), ventilation, and heating control, so that the temperature control accuracy of the air conditioner is higher, and the comfort of passengers is increased. When one of the cooling and heating systems fails, the other cooling and heating system can still work normally to ensure the cooling and heating requirements of the passenger room.

One housing 6 is divided into two outdoor cavities 8 and two indoor cavities 7, the two outdoor cavities 8 are installed side by side in the middle, and the two indoor cavities 7 are respectively arranged on both sides of the two outdoor cavities 8, each set of refrigeration The heat system is installed in a corresponding outdoor chamber 8 and an indoor chamber 7 .

Two evaporators 37, two evaporation fans 38, two electric heaters 39, two expansion valves (not shown) are installed in an indoor chamber 7, and two condensers 40 are installed in an outdoor chamber 8. , a condensing fan 41 and two compressors 42, and also include a solenoid valve, two one-way valves and a dry filter. The air conditioning unit 4 includes four evaporators 37 , four evaporator fans 38 , four electric heaters 39 , four expansion valves, four condensers 40 , two condensing fans 41 and four compressors 42 .

As shown in Fig. 4 and Fig. 5, two air supply ports 16 and one return air port 17 are opened at the bottom of the shell of each chamber 7, and the two air supply ports 16 and one return air port 17 are arranged side by side in the vehicle width direction. The two air supply ports 16 are arranged on both sides of the air return port 17, and the air conditioning unit 4 includes four air supply ports 16 and two return air ports 17 in a symmetrical structure.

Two evaporators 37, two evaporating blowers 38 and two electric heaters 39 inside each chamber 7 are arranged in a symmetrical structure with the center line of the car body as the center to both sides in the width direction of the car body, that is, the two electric heaters The heater 39 is in the middle, and two evaporators 37 are arranged on the outside, and two evaporator fans 38 are arranged on the outside of the evaporator 37. This arrangement makes the structure of the interior cavity more compact, and is beneficial to arrange the air outlet 16 at the width of the vehicle. The position on both sides of the direction.

As shown in FIG. 3 and FIG. 5 , a fresh air outlet 43 is provided at the center of the housing end wall of each chamber 7 , and a filter device is installed at the fresh air outlet 43 . The fresh air outside the car enters the inside of the air-conditioning unit 4 from the fresh air outlet 43 and mixes with the return air in the passenger compartment. The mixed air passes through the evaporator 37 for heat exchange, and the cooled air is sent into the air supply duct 22 through the air supply outlet 16. Then it is sent to the passenger room through the air supply outlet in the car. During winter, open electric heater 39, the air after mixing is heated by electric heater 39, and the air after heating is sent in the air supply duct 22 by air supply port 16, then is delivered to passenger room by air supply port in the car.

As shown in Figures 2 and 5, two condensers 40 are used in one outdoor chamber 8, which can effectively increase the condensation area. Two condensing air inlets 14 and one condensing air outlet 15 are set on the housing, the condensing air outlet 15 corresponds to the condensing fan 41 and is set in the center of the top wall of the housing 6, and the two condensing air inlets 14 correspond to the condenser 40 and are separately arranged at the condensing air outlet 15, two compressors 42 are installed on one side of the condensing fan 41, and are installed between the two condensers 40, and the four compressors 42 in the two sets of refrigeration and heating systems are installed side by side on the side of the air conditioning unit 4 central.

As shown in Figure 2 and Figure 3, in order to increase the condensing air intake, the top wall and the side wall of the housing 6 are connected by an inclined transition plate 31, and the condensing air inlet 14 is also opened on the transition plate 31, The condenser 40 adopts a flat fin-tube heat exchanger, and the air is taken in from the condensation air inlet 14 on the top of the housing 6 and the transition plate 31 at the same time. Condenser 40 can also have a downward bending part here, in order to reach the purpose of further increasing the heat transfer area of condenser 40, in addition, can also be provided with an auxiliary condenser (not shown in the figure) separately corresponding to condensing air inlet 14 Out), the auxiliary condenser is connected in series with the condenser above the corresponding side.

In this embodiment, the two cooling and heating systems work independently, and the two compressors 42 in each cooling and heating system are connected in parallel to form a compressor unit. The compressor 42 is a fully enclosed scroll compressor. The intake pipe and exhaust pipe of two compressors 42 are connected in parallel, and between the two compressors 42, an air balance pipe and an oil balance pipe are connected. The fully enclosed scroll compressor has excellent performance in anti-vibration, anti-liquid shock and frequent start-up, and also has the characteristics of low noise, small vibration, high efficiency and long life.

The two condensers 40 in each set of refrigeration and heating systems are connected in parallel with each other. The exhaust port of the compressor unit enters the two condensers 40 through the pipeline at the same time. The outlet of each condenser 40 is connected to an expansion valve, and the outlet of the expansion valve is connected to One evaporator 37, the outlets of the two evaporators 37 are connected in parallel with the air inlet of the compressor unit to form a complete refrigeration circuit.

Each set of cooling and heating systems is equipped with a controller (not shown in the figure), and the two controllers are respectively installed inside the two chambers 7. The controller controls the two sets of cooling and heating systems to work independently. The controllers also communicate through multi-core shielded cables to realize the interconnection of start-up and fault, which is convenient for maintenance. In this embodiment, the controller is installed on the top of the indoor chamber 7 through structures such as a fixed bracket (not shown in the figure), and is located in the return air area. The heat dissipation environment in this area is good, and the return air can be used to cool the controller. Effectively prolong the working life of the electrical components in the controller.

In this embodiment, an electrical connector and a communication programming interface for connecting with cables in the car are installed on the bottom wall of the air conditioning unit 4 near the air return port, corresponding to the control loop and the main loop respectively, and the control loop and the main loop are routed from the inside of the car. The outgoing wiring harness enters the inside of the air-conditioning unit 4 through the connector, and the electrical connector and the communication programming interface are installed in a recessed window, and a ten-thousand-turn switch, a fault indicator light, and a reset button are also arranged in the window. The design of the connection interface at the bottom of the air conditioning unit 4 is very convenient for the operation and maintenance of the air conditioning unit 4 after it is installed on the vehicle. Portable test equipment can be used to communicate and download faults of the air conditioning system, which is convenient for troubleshooting and realizes mechatronics. air conditioning design requirements.

The air-conditioning unit 4 automatically adjusts the multi-stage cooling capacity, and the controller compares the collected return air temperature with the automatic temperature control curve to make the air-conditioning unit operate under semi-cooling, full-cooling, ventilation and heating conditions. Switching between them can realize constant temperature control in the car and protect the freshness of the air in the car. It can also better protect the compressor and achieve the purpose of saving energy and electricity.

Among them, the ventilation working condition: only the evaporating fan 38 works in the air-conditioning unit 4. After the fresh air is mixed with the return air, it is filtered through a filter, and then the evaporating fan 38 passes the treated air through the air outlet 16 and the opening on the steel structure 23 of the vehicle body. Delivered in the air supply duct 22, then delivered to the passenger room by the air supply port 12 and the air supply port 36 in the car.

Semi-cooling working condition: only one refrigeration system works, that is, two evaporating fans 38, one condensing fan 41 and two compressors 42 work. After the fresh air and return air are mixed, the evaporator 37 completes cooling and cooling, and then the evaporator The fan 38 sends the treated air to the air supply duct 22 .

Total cooling working condition: two sets of refrigeration systems are all working, four evaporating fans 38, two condensing fans 41, and four compressors 42 are all working. The fan 38 sends the treated air to the air supply duct 22 .

Heating working condition: four evaporating fans 38 and four electric heaters 39 are working, the fresh air and return air are mixed, heated by the electric heaters 39, sent to the air supply duct 22 by the evaporating fans 38, and the passenger room is heated. Temperature control and air conditioning. In this embodiment, according to the temperature control curve, the switching on and off of the solid-state relay is controlled by the output PWM of the PLC through the output terminal of the PLC. The heating capacity can be adjusted steplessly from 0-100%.

As shown in Figure 5, two access doors (not shown) that can be flipped up and opened are provided on the top of the housing of each chamber 7, and the access doors are connected with the middle beam 46 through hinges 45, and the access doors The movable side is fixedly connected with the casing 6 through a locking structure, so as to avoid opening during the operation of the vehicle, and the setting of the inspection door is convenient for the daily inspection and maintenance of the operator.

The controller of the air-conditioning unit realizes the network communication function with the driver's cab monitoring system through RS485, and the controller can upload the operation status information and fault information of the air-conditioning unit 4 to the driver's cab monitoring system. The remote centralized control of the air conditioning unit is realized through the network communication line, instead of being controlled by the machine, the operator can realize the start and stop of the air conditioning unit on the console of the driver's cab, and remotely monitor the operating status of the air conditioner. When an auxiliary power supply of the vehicle fails, the vehicle sends a signal to the air-conditioning unit 4, and the air-conditioning unit 4 automatically runs in a semi-cooling mode under load reduction. When the auxiliary power supply returns to normal, the air-conditioning unit 4 automatically converts into a normal cooling mode.

As shown in Figures 6 and 7, an interior trim panel is installed on the inner side of the car body 1 to beautify the riding environment in the passenger compartment. 20. End wall panels and floors 19. In this embodiment, the cavity between the side roof 20, the middle roof 21 and the steel structure 23 of the vehicle body at the top and part of the side is enclosed to form a closed space as the air supply duct 22. To send the cold air processed by the air conditioning unit 4 into the passenger compartment, the four air supply ports 16 of the two sets of air conditioning units 4 are all connected with the air supply duct 22 , and the four air supply ports 16 are located above the side roof 20 .

A roof frame 24 is fixedly installed above the middle roof 21. The roof frame 24 is made of an aluminum alloy profile, which is a criss-cross frame structure composed of multiple beams and longitudinal beams. The roof frame 24 is installed within a certain wide range in the center of the car body 1. The roof frame 24 is fixed on the vehicle body steel structure 23 at the top of the vehicle body 1 through a plurality of roof installation beams (not shown in the figure), and the roof installation beams are arranged along the length direction of the vehicle body and welded to the steel structure 23 of the vehicle body. On the lower surface, the roof frame 24 is fixedly connected to the roof installation beam by bolts.

Two of the middle roof 21 are respectively welded and fixed with two long connectors 44 extending along the length direction of the car body, and the connectors 44 are fixed on the longitudinal beams of the roof frame 24 by bolts 32, in order to ensure that the middle roof 21 joints For sealing, a sealant strip is installed between the connector 44 and the roof frame 24 . When the middle roof 21 is installed, the installation sequence is roof installation beam -> roof frame 24 -> middle roof 21. On the basis of the roof frame 24, the middle roof 21 of the lower layer is installed one by one from one end of the passenger compartment. 21 are crimped and connected to each other.

The side edge of the bottom of the side roof plate 20 is welded and fixed with a long connecting piece 28 extending along the length direction of the vehicle body. The connecting piece 28 is fixedly connected with the connecting piece (not shown in the figure) on the side wall plate 18 through a plurality of bolts 33. Furthermore, the fixed connection between the side roof board 20 and the side wall board 18 is realized. A side wall frame 26 is fixedly installed on the side wall of the vehicle body 1, and the side wall plate 18 is fixedly connected with the side wall frame 26 by self-tapping screws. In order to achieve sealing, a sealing strip is installed between the connecting piece 28 on the side roof panel 20 and the connecting piece of the side wall panel 18. In the area at the top of the door 2, the side roof panel 20 encloses the driving mechanism of the door.

The other side of the side roof 20 is fixedly connected to the roof frame 24. In this embodiment, the side roof 20 and the roof frame 24 are rotatably connected by a hinge 34, and one side of the hinge 34 is fixed on the roof frame 24 by bolts. , the other side is welded or bonded to fix the side roof 20, which can facilitate maintenance. During maintenance, only the bolt 33 between the side roof 20 and the side wall 18 needs to be loosened, and the side roof 20 can be turned down to detect Space and equipment above the side ceiling 20.

Between the middle top plate 21 and the side top plate 20, a side top with light body 29 is arranged. The side top with light body 29 is composed of a light frame, a lampshade and an internal light source, wherein the light frame is made of aluminum plate or aluminum alloy profile, and the light The top of frame is fixed on the roof frame 24 by bolts. The side roof with lamp body 29 is provided along the length direction of the car body, and a gasket is set between the top of the side roof with lamp body 29 and the roof frame 24 to separate the space above from the passenger compartment. As shown in Figure 6, there will be a slit-shaped gap between the edge of the side roof 20 and the side roof with lamp body 29 where the hinge 34 is not installed, and this gap can be used as the air supply port 12 in the car to send out air to the passenger compartment. Air conditioning unit 4 treated air. In addition to the slit-shaped car interior air supply port 12 between the edge of the side roof 20 and the side roof with lamp body 29, a plurality of car interior air supply ports 36 are evenly opened on each side roof 20, as shown in Figure 9, For attractive appearance and even air supply, the air supply port 36 in the car adopts a slit-shaped opening, and the cold air processed by the air-conditioning unit 4 is sent out from the slit-shaped car interior air supply ports 12 and 36 on the both sides of the passenger compartment.

At the position of the roof, a relatively closed space with a certain height is surrounded by the middle roof 21, the side roofs 20 on both sides, and the cavity between the top of the car body 1 and the car body steel structure 23 on some sides. The space above the side roof 20 and the middle roof 21 is interconnected, and this space is used as the air supply duct 22, and does not affect the installation of other equipment in the space. The slit-shaped air-supply port 12 and the slit-shaped air-supply port 36 in the car between the side roof band lamp body 29 and the side roof 20 are delivered to the passenger compartment to regulate the temperature and humidity in the passenger compartment.

On the car body steel structure 23, there is an opening corresponding to the air supply port 16 of the air conditioning unit 4, and the air supply port 16 and the opening are sealed and connected by a sealing rubber strip, and an air supply box 10 is fixedly installed at the opening to supply air The box 10 is in the air supply duct 22, and the air supply box 10 is made of glass fiber reinforced plastic. As shown in Figure 8, the air supply box 10 is a box structure, the top of the air supply box 10 is open, and an air outlet 11 is respectively opened on its two opposite side walls, and the top edge of the air supply box 10 passes through Screws are fixed on the car body steel structure 23, and the air supply box 10 communicates with the air supply duct 22 surrounded by the middle roof 21, the side roof 20 and the car body steel structure 23 between the air supply port 16 of the air conditioning unit 4. The air supply box 10 plays the role of the static pressure chamber, and changes the air flow direction of the air conditioning unit 4 at the same time. In the air duct 22, the air flow is further buffered in the air supply duct 22, so that the air supply air flow is more uniform.

On the middle roof 21, the position corresponding to the air return port 17 of the air conditioner unit 4 is provided with the air return port 13 in the car, on the middle roof 21, two return air ports 13 are opened in the car, and on the steel structure 23 of the car body, two air return ports 13 are also provided with the air conditioner unit. The corresponding opening (not shown) of the air return port 17 of 4, the back side of the air return port 13 in the car is connected with a return air duct 30, and the return air duct 30 is surrounded by a dividing plate 35, and the space outside the dividing plate 35 is uniform. As air supply duct 22. The opening on the steel structure 23 of the car body and the return air outlet 17 of the air conditioning unit 4 are sealed and connected by a sealing rubber strip, and the connection between the return air outlet 13 and the return air duct 30 in the vehicle is also sealed and connected by a sealing rubber strip. The air in the car enters the return air duct 30 through two return air outlets 13 in the car on the middle roof 21, and finally enters the air-conditioning unit 4 for heat exchange. The two return air outlets 17 of the air conditioning unit 4 are connected.

During installation, after the air conditioner unit 4 is installed on the car body steel structure 23, the air return port 17 of the air conditioner unit 4 is exposed according to the position of the air return port 17 in the car body steel structure 23 and the middle roof 21. The steel structure 23 of the car body is equipped with an opening and the air supply box 10 is installed corresponding to the air supply port 17 with self-tapping screws, and the joints are sealed and connected by sealing rubber strips.

As shown in Fig. 6 and Fig. 7, on the car body steel structure 23, two drain grooves 9 with upper openings are installed longitudinally along the car body 1. The steel structures 23 of the car body are sealed and connected by welding, and the drainage groove 9 is made of aluminum alloy or stainless steel to reduce weight. Condensed water and rainwater etc. during air-conditioning unit 4 work all lead to the drainpipe that is positioned at the two ends of air-conditioning platform from gutter 9, then finally discharge to the outside of the car.

A line pipe 27 is installed between the vehicle body steel structure 23 and the middle roof 21, and cables and the like are installed in the line pipe 27, and the line pipe 27 is fixed on the roof frame 24 by pipe clamps.

The air processed by the air conditioning unit 4 enters the four air supply boxes 10 after passing through the four air supply ports 16, and then is sent into the air supply duct 22 from the air outlets 11 of the four air supply boxes 10, and the cold air finally passes through the side ceiling. 20 and the slit-shaped air supply port 12 in the car between the side roof light body 29 and the slit-shaped air supply port 36 in the car on the side roof 20 are sent into the passenger compartment, and at the same time, the air in the car passes through the air supply port 36 on the middle roof 21. The two return air outlets 13 in the car enter the return air duct 30, and finally enter the air-conditioning unit 4 to exchange heat with the evaporator to complete the refrigeration cycle. In this embodiment, the air supply from the air-conditioning unit 4 is delivered to the passenger compartment along the longitudinal direction of the car body, and there is no dead air supply angle, which solves the problem of uneven longitudinal air supply in the passenger compartment. Reasonable airflow organization can avoid the discomfort caused by direct air blowing to the human body, improve the poor air-conditioning effect of vehicles with small cross-sections in summer, and improve the comfort inside the vehicle.

In this embodiment, the built-in top space is rationally utilized, and the cavity between the middle roof 21, the side roof 20 and the car body steel structure 23 on the top is used as the air supply duct 22, and the air supply duct is no longer installed separately to solve the problem. It solves the problem that the air supply duct cannot be arranged on the top of the passenger compartment, and at the same time saves a separate air duct structure, reduces weight and saves costs, and, while ensuring the air supply volume, can reduce the distance between the interior roof plate and the steel structure of the car body 23 The height above the middle roof plate 21 of the roof is reduced from 220mm in the prior art to 120mm, thereby reducing the height of the vehicle and meeting the requirements of the vehicle boundary. In addition, it is not limited by the installation space of the air-conditioning unit 4, so that the uniformity of air supply in the longitudinal space of the entire passenger room is guaranteed.

The air supply port and air return port of the air conditioning unit adopt a windproof and waterproof sealing structure to ensure that there is no air leakage or water leakage. It is easy and reliable to install on the car without special tools and complicated operating procedures. And rainwater can be smoothly discharged from the drain pipe, the sealing performance is good, and there is no leakage of condensed water and water droplets blowing out and dripping.

As shown in Figure 10, in the present embodiment, a first annular groove 47 is arranged around the air outlet on the bottom wall 4 of the air conditioning unit 2, and a circle of first sealing gasket 48 is installed in the first annular groove 47 with glue. , the first annular groove 47 is installed on the bottom wall 53 of the air conditioning unit 4 with the opening facing down, and the first gasket 48 has the same shape as the first annular groove 47 . Equally, be provided with a second annular groove 49 around the opening on the car body steel structure 23, in the second annular groove 49, install a circle of second gasket 50 with glue bonding, the second annular groove 49 openings are installed on On the upper surface of the vehicle body steel structure 23 , the second gasket 50 has the same shape as the second annular groove 49 .

The first annular groove 47 and the second annular groove 49 are mutually staggered, and after installation, one side of the first annular groove 47 presses the second gasket 50 in the second annular groove 49, and at the same time, the side of the second annular groove 49 One side presses the first gasket 48 in the first annular groove 47 to form two seals on the inner ring and the outer ring, which realizes the airtight connection between the air supply port and the opening, and ensures better airtightness of the high-speed rail vehicle. demanding.

In order to prevent the metal sides of the first annular groove 47 and the second annular groove 49 from damaging the first gasket 48 and the second gasket 50 during compression, in this embodiment, the first annular groove 47 is used for compression Wrap a layer of first sealing rubber strip 51 on the side corresponding to the second sealing gasket 50, and wrap a layer of second sealing rubber strip 52 on the side of the second annular groove 47 for pressing the corresponding first sealing gasket 48 , when pressing, use the first sealing rubber strip 51 and the second sealing rubber strip 52 to contact the first sealing gasket 48 and the second sealing gasket 50, so as to prevent the metal from directly contacting the first sealing gasket 48 and the second sealing gasket 50 .

In this embodiment, it is preferable that the two sides of the first annular groove 47 and the second annular groove 49 adopt a long and short side structure, and the long side is used as an annular protrusion to press the corresponding first annular groove 47 and second annular groove 49 The inner first gasket 48 and the second gasket 50 realize sealing, which is more convenient for installation, and the compression deformation is also larger, and the compression sealing performance is further improved. Utilize the width of the first annular groove 47 and the second annular groove 49 and the length of the long side to compress and seal, which can fully absorb the installation errors in the vertical and horizontal directions during the actual vehicle installation, making the installation and adjustment more convenient , Improve installation efficiency.

The first annular groove 47 and the second annular groove 49 adopt channel steel or aluminum alloy profiles, which are respectively fixedly welded on the bottom wall of the air-conditioning unit 4 and the steel structure 23 of the car body, which is easy to install and can ensure sealing performance.

Embodiment two:

The difference from Embodiment 1 is that two longitudinal beams (not shown in the figure) are installed between the middle roof 21 and the steel structure 23 of the vehicle body along the length direction of the vehicle body, and the two longitudinal beams connect the side roofs 20 on both sides. The upper space is separated to form two independent side ceiling spaces. Only the space above the side ceiling 20 is used as the air supply duct 22. connected. Longitudinal girder can not be provided separately, directly utilizes two roof installation beams, and when roof installation beam and roof frame 24 are fixedly connected, realizes sealing by structures such as gaskets, separates the space of two side roofs.

As mentioned above, a similar technical solution can be derived in combination with the content of the solution given in the accompanying drawings. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the utility model still belong to the scope of the technical solution of the utility model.

Claims (10)

1. An ultra-thin air-conditioning unit, comprising a shell, an air supply port and an air return port are provided on the bottom wall of the shell, and it is characterized in that: two sets of independent cooling and heating systems are installed in the shell, Two sets of cooling and heating systems are arranged in a symmetrical structure. Each cooling and heating system includes two compressors, two condensers, two evaporators, two expansion valves, two evaporating fans, one condensing fan and two electric fans. As for the heater, each cooling and heating system is equipped with a set of controllers, and the controllers are integrated and installed in the casing. 2. An ultra-thin air-conditioning unit according to claim 1, characterized in that: two compressors in each cooling and heating system are connected in parallel to form a compressor unit, and the two condensers are connected in parallel with the compressor unit The outlet of each condenser is connected to an expansion valve, the outlet of the expansion valve is connected to the inlet of one of the evaporators, and the outlets of the two evaporators are connected in parallel to the inlet of the compressor unit connect. 3. An ultra-thin air-conditioning unit according to claim 1, characterized in that: the housing is divided into two indoor cavities and two outdoor cavities, the two outdoor cavities are installed side by side in the middle, and the two The indoor chambers are arranged on both sides of the two outdoor chambers, two compressors, two condensers and a condensing fan are installed in each of the outdoor chambers, and two evaporators are installed in each of the indoor chambers , two expansion valves, two evaporation fans and two electric heaters. 4. An ultra-thin air-conditioning unit according to claim 3, characterized in that: the two electric heaters, the two evaporators and the two evaporating fans are parallel to both sides from the center of the vehicle body in the width direction of the vehicle body Symmetrically arranged, the two electric heaters are located in the middle, and the evaporators and evaporation fans are arranged in sequence on both sides. 5. An ultra-thin air-conditioning unit according to claim 4, characterized in that: the two air supply ports are arranged on both sides of the housing in the vehicle width direction, and the air return port is arranged at the end of the two air supply ports middle. 6. The ultra-thin air conditioner unit according to claim 4, characterized in that: new air outlets are provided on the end walls of the front and rear ends of the housing. 7. The ultra-thin air-conditioning unit according to claim 1, wherein the controller is installed in the area above the return air outlet. 8. An urban rail vehicle, characterized in that it includes the ultra-thin air-conditioning unit according to any one of claims 1-7, and the air-conditioning unit is fixedly installed on the steel structure of the car body on the roof. 9. An urban rail vehicle according to claim 8, characterized in that: the cavity between the side roof and/or middle roof in the passenger compartment and the steel structure of the car body is enclosed to form a closed space as an air supply duct , on the corresponding side roof and/or the middle roof, there are air supply outlets and air return outlets in the car that supply air to the passenger compartment, and the air supply outlets of the air conditioning unit and the air supply outlets in the vehicle are all connected to the air supply duct The air return port in the vehicle communicates with the return air port of the air conditioning unit through the return air duct. 10. The urban rail vehicle according to claim 9, characterized in that: the air supply port and the air return port corresponding to the air conditioning unit are respectively provided with openings on the steel structure of the car body, and the two openings are respectively connected to the The air supply duct and the return air duct are connected, and an annular groove is respectively arranged around the air supply port and/or the return air port and the corresponding opening, and a ring of sealing gaskets is respectively installed in the two annular grooves. The annular grooves are arranged staggered with each other, and after installation, one side of the annular groove acts as an annular protrusion to press against a gasket in the other annular groove to achieve sealing.