CN206406923U - A kind of empty rail vehicle low noise air-conditioner set - Google Patents

Abstract

A kind of empty rail vehicle low noise air-conditioner set of the utility model, belongs to rail vehicle technical field, including the ventilating system and refrigeration system being arranged in housing, key is：Centrifugal evaporation fan, control unit and compressor in the refrigeration system are arranged side by side in immediately below stock rail, and both sides, condenser and the condensation fan that the evaporator of matching is symmetricly set on centrifugal evaporation fan are symmetricly set on the both sides of control unit；Housing bottom below described control unit is provided with the air outlet of open car guest room, and air outlet connects to form variable displacement type noise elimination air-supply structure by noise elimination bend pipe with the air outlet of centrifugal evaporation fan.Each part of air-conditioner set rational deployment, makes full use of the rail base space of roof, and supply air duct is integrated in inside air-conditioner set, increases noise elimination structure, and compact conformation, energy-conserving and environment-protective, noise are low.

Description

A low-noise air-conditioning unit for empty rail vehicles

technical field

The utility model belongs to the technical field of rail vehicles and relates to an air-conditioning unit for rail vehicles, in particular to a unit air-conditioning unit installed on the top of a suspended empty rail vehicle.

Background technique

With the continuous advancement of my country's urbanization process, the lack of road traffic resources has increased the pressure on urban ground traffic. In order to solve the urban traffic pressure, urban three-dimensional traffic has become an effective way. The ground, rail, and underground traffic cooperate with each other. The traffic mode is changed from the original ground level intersection to the three-dimensional intersection. However, because the construction of subways is restricted by geological and geomorphological factors, and the construction period is long and the capital investment is large, not every city can build subways. In order to make reasonable use of the ground space, suspended empty rail vehicles came into being. Affected by factors such as space, load-bearing, and safety, the existing suspended empty rail vehicle has a shorter car body and less space. The length of the carriage of my country's first empty railway is about 8 meters, and the width is about 3 meters. In order to meet the comfort requirements of passengers, it is necessary to install air conditioners on air trains.

Air conditioners installed on existing rail vehicles generally adopt two installation methods: one is split type, the indoor unit is located in the compartment, and the outdoor unit is generally installed at the bottom of the car body; the other is unit type, the air conditioner unit is installed on the car body In the space between the roof and the roof of the car. The track of the air railway is on the top of the roof. It is necessary to transfer the components that match the track under the ordinary rail vehicle to the roof. At the same time, some other structures will be added to the roof adaptability, and more electrical equipment will be arranged on the bottom of the car. If a split structure is adopted, the air conditioner is installed at the lower part of the car body, and those electrical equipment need to be avoided. The pipeline connection is complicated, which is not beautiful, and will also bring various problems in safety and maintenance. If a unit structure is adopted, the transferred and newly added structures occupy the installation space of the air-conditioning unit on the original roof; therefore, how to reasonably install the unit in a limited space, and at the same time make the installed air-conditioning achieve environmental protection, low energy consumption, and low The effect of noise is one of the problems that need to be solved for suspended empty rail vehicles.

Contents of the invention

In order to meet the needs of empty rail vehicles, the utility model designs a low-noise integrated air-conditioning unit unit, rationally arranges various components, makes full use of the space at the bottom of the track on the roof, and integrates the air supply duct inside the air-conditioning unit , Increase the noise reduction structure, compact structure, energy saving and environmental protection, low noise.

The technical solution of the utility model is: a low-noise air-conditioning unit for empty rail vehicles, including a ventilation system and a refrigeration system arranged in the housing, the key lies in: the centrifugal evaporating fan, the control unit and the compressor in the refrigeration system Arranged side by side directly under the vehicle track, the matching evaporator is symmetrically arranged on both sides of the centrifugal evaporating fan, the condenser and the condensing fan are symmetrically arranged on both sides of the control unit; the bottom of the housing below the control unit is provided with a communication compartment The air supply port of the passenger compartment is connected with the air outlet of the centrifugal evaporative fan by means of the silencing elbow to form a variable volume silencing air supply structure.

Further, a group of arc-shaped air deflectors are arranged inside the muffler elbow along the air supply direction.

Further, the surface of the wind deflector is wrapped with a layer of sound-absorbing material.

Further, the inner wall of the noise-absorbing elbow is provided with a sound-absorbing material layer.

Further, the sound-absorbing material layer is a glass cloth layer and an ultrafine glass wool layer, and the glass cloth layer wraps the ultrafine glass wool layer.

Further, the sound-absorbing material layer is porous glass wool or slag wool.

Further, the outer periphery of the noise-absorbing elbow is wrapped with an elastic insulation layer.

Further, the centrifugal evaporating fan is limited by the semi-flexible composite shock-absorbing base and the pre-tightening force of the shell.

Further, the semi-flexible composite shock-absorbing base includes a steel bottom layer, a flexible middle layer and a hard rubber layer, forming an elastic shock-absorbing mechanism between the centrifugal evaporating fan and the casing.

Further, the ventilation system includes a return air outlet arranged at the bottom of the housing on the air intake side of the evaporator, a fresh air outlet located on the side wall of the housing, and a condensing air inlet and outlet. The return air is mixed on the air inlet side of the evaporator, and the two condensing air inlets are arranged on the top of the casing on the air inlet side of the condensing fan and on both sides of the vehicle track, and the two condensing air outlets are arranged on the casing on the air outlet side of the condenser on the side wall.

In the technical solution of the utility model, 1. Because the installation space is small, a compressor is installed, and a small-diameter horizontal scroll frequency conversion compressor is used to reduce the installation space of the compressor while ensuring the performance of the unit, and reduce the manufacturing cost of the air-conditioning unit. Reduce the cost and reduce the weight of the unit; a pair of condensers are arranged vertically to reduce the loss of condensing air flow resistance caused by the height reduction. In order to avoid the influence of the vehicle track on the fresh air and condensing air, the evaporating fan, control unit and compressor are arranged side by side directly under the vehicle track, and the matching evaporators are symmetrically arranged on both sides of the evaporating fan, two sets of condensers and condensing Fans are arranged symmetrically on both sides of the control unit to return air, inhale fresh air and condense air from both sides of the track. 2. The air conditioner unit is fixed in the shell, and the shell is installed in the space between the top plate of the car body and the roof of the car body. The air return port and the air supply duct adopt a sealing mechanism that sinks into the unit to reduce the height of the sealing structure of the car body. , The radiator of the control unit sinks into the air supply duct, and dissipates heat with the help of the air supply, omitting heat dissipation components and simplifying the structure. There is a drainage hole at the bottom of the housing, through which the condensed water is discharged to the drainage tank of the vehicle, and finally discharged outside the vehicle to achieve the purpose of cooling and dehumidification. 3. The air volume and air pressure of the centrifugal fan are both large. Under the same air volume and air pressure, the noise of the centrifugal fan will be relatively small. 4. The air supply port is far away from the heat source compressor, and the elastic insulation layer is wrapped around the outer circumference of the muffler elbow to prevent the cooled air from passing through the heat source for heat conduction and causing energy loss. 5. For the roof-mounted air-conditioning unit of the empty rail vehicle, the internal space is narrow, and the air supply port is almost directly connected with the outlet of the evaporating fan. In order to adapt to the narrow space of the air-conditioning unit of the empty rail vehicle, and to prevent the nozzle of the evaporating fan from being directly connected to the air supply port, the noise caused by the high-speed rotation of the evaporating fan is directly transmitted to the vehicle compartment, and to avoid the vibration of the evaporating fan passing through during the working process. The air supply port is also transmitted to the cabin, so that the noise is superimposed. In this plan, a small section of muffler elbow is set, and an air deflector is installed inside the muffler elbow. The surface of the air deflector and the inner wall of the muffler elbow are covered with sound-absorbing materials. , to channel air supply and absorb noise. 6. The centrifugal evaporating fan is limited by the semi-flexible composite shock-absorbing base and the pre-tightening force of the shell, which can further reduce the noise.

The beneficial effects produced by adopting the above technical scheme are: 1. The utility model avoids the influence of the vehicle track, adopts a compact refrigeration system, arranges the evaporating fan, the control unit and the compressor side by side directly under the vehicle track, and the matching evaporator , Condenser and condensing fan are symmetrically arranged on both sides of the track, and the ventilation system is integrated into the inside of the air conditioning unit, returning air from both sides of the track, inhaling fresh air and condensing air in and out, and supplying air from the bottom of the track; the layout is reasonable, the structure Simple, it avoids the impact of space reduction on the condensation effect, and adopts the ventilation method of bottom out and next time, so that the cooling capacity or heat in the compartment can be utilized to the maximum, reducing intermediate links, and improving the cooling and heat exchange efficiency of the air conditioning unit. Make passengers have a good ride environment. 2. The air supply duct is integrated inside the air conditioning unit, adding noise reduction and shock absorption structures, and the noise is low.

Description of drawings

Fig. 1 is the structural representation of the utility model after removing the top plate of the housing;

Fig. 2 is the structural representation of the noise-absorbing elbow of the utility model;

Fig. 3 is a schematic diagram of the relative positions of the air-conditioning unit and the vehicle track;

Figure 4 is a schematic diagram of the distribution of air outlets at the bottom of the air conditioning unit;

Fig. 5 is a schematic perspective view of the installation structure of the air-conditioning unit on the empty rail vehicle;

In the drawings, 1 is the housing, 2 is the vehicle track, 111 is the evaporating fan, 112 is the evaporator, 113 is the air return port, 114 is the fresh air port, 121 is the compressor, 122 is the control unit, 123 is the condenser, 124 Represent condensing fan, 125 is an air supply port, 126, 127 represent condensing inlet and outlet, 13 is a muffler elbow, 131 represents a deflector, and the direction of the arrow is the wind direction.

detailed description

A low-noise air-conditioning unit for an empty rail vehicle, comprising a ventilation system and a refrigeration system arranged in a casing 1 . The housing 1 is divided into an evaporation chamber and a condensation chamber along the direction of the vehicle rail 2 above it. The centrifugal evaporating fan 111, the control unit 122 and the compressor 121 in the refrigeration system are arranged side by side directly under the vehicle track 2, and the matched evaporator 112 is symmetrically arranged on both sides of the centrifugal evaporating fan 111, the condenser 123 and the condenser 123. The fan 124 is arranged symmetrically on both sides of the control unit 122; the bottom of the housing 1 below the control unit 122 is provided with an air supply port 125 which communicates with the passenger compartment of the carriage, and the air supply port 125 is connected to the exit of the silencing elbow 13 and the centrifugal evaporating fan 111. The air outlets are connected to form a variable volume muffler air supply structure. A group of arc-shaped air deflectors 131 are arranged inside the muffler elbow 13 along the air supply direction. The surface of the wind deflector 131 is wrapped with a sound-absorbing material layer. The inner wall of the muffler elbow 13 is provided with a sound-absorbing material layer. The sound-absorbing material layer can use glass cloth layer and ultra-fine glass wool layer, and the glass cloth layer wraps the ultra-fine glass wool layer; or use porous glass wool or slag wool, which are available in the market. It is also more convenient to obtain materials. The outer circumference of the sound-absorbing elbow 13 is wrapped with an elastic heat-insulating layer. The centrifugal evaporating fan 111 is limited by the pre-tightening force of the semi-flexible composite shock-absorbing base and the housing 1 . The semi-flexible composite shock-absorbing base includes a steel bottom layer, a flexible middle layer and a hard rubber layer, forming an elastic shock-absorbing mechanism between the centrifugal evaporating fan 111 and the casing 1 .

The ventilation system includes a return air outlet 113 arranged at the bottom of the housing 1 on the air inlet side of the evaporator 112, a fresh air outlet 114 positioned on the side wall of the housing 1, and condensation inlet and outlet 126, 127. The fresh air sucked from the new air outlet 114 and The return air inhaled from the compartment is mixed at the air inlet side of the evaporator 112, and two condensation air inlets 126 are arranged on the top of the housing 1 on the air inlet side of the condensation fan 124 and both sides of the vehicle track 2, and two condensation air outlets 127 It is arranged on the side wall of the casing 1 on the air outlet side of the condenser 123 .

For specific implementation, referring to the accompanying drawings, the compressor is a small-diameter horizontal scroll compressor, the evaporating fan 111 is a centrifugal fan, and the condensing fan 124 is an axial fan. Both pairs of axial flow fans use short casing motors, and the evaporator 112, condenser 123 and condensing fan 124 are arranged vertically. Two air return ports 113 are provided, one air supply port 125 is provided, and two fresh air ports 114 are provided.

During the operation of the air conditioning unit, the compressor 121 compresses the refrigerant into a high-pressure and high-temperature medium gas. The high-temperature gas flows through the air-cooled condenser 123, and is condensed into a normal-temperature and high-pressure liquid by forced cooling of the outside air. The liquid medium is filtered by a dry filter. After that, it flows through the electronic expansion valve to throttle and reduce pressure, and becomes a low-temperature and low-pressure gas-liquid mixed medium, and then evaporates into low-temperature and low-pressure steam through the evaporator 112 through heat exchange with indoor return air and fresh air. Temperature: Finally, the low-temperature and low-pressure steam is separated by the gas-liquid separator and then sucked by the compressor 121, completing a closed refrigeration cycle. Simultaneously, under the action of the evaporator fan 111, the low-temperature air after heat exchange by the evaporator 112 passes through the muffler elbow 13 and is blown out from the air outlet 125 to cool down the interior of the vehicle compartment. Under the action of the evaporating fan 111, the air at room temperature enters the evaporation chamber through the air return port 113, and mixes with the fresh air outside the car entering through the fresh air port 114 to form a mixed air that is then forced to exchange heat with the evaporator 111 to form low-temperature air. The air outlet 125 blows out to realize circulation cooling. Under the action of the condensing fan 124, the outdoor air is sucked into the condensing chamber from the condensing air inlets 126 on both sides of the track, and after heat exchange by the condenser 123, the high-temperature air is discharged into the outside world through the condensing air outlet 127 on the side wall. Complete a condensing air exchange process of top air intake and side wall exhaust. The air inlet positions are close to each other, and the air outlet positions are far away from each other. The air circulation paths of the two parts are different, which prevents the high-temperature air from one side from entering the other side, effectively improving the heat exchange efficiency and reducing energy consumption. By adopting the structure of the utility model, the noise is more than 3 decibels lower than that of the air-conditioning unit without noise elimination and shock absorption structure.

Claims (10)

1. A low-noise air-conditioning unit for empty rail vehicles, including a ventilation system and a refrigeration system arranged in the housing (1), characterized in that: the centrifugal evaporator fan (111) and the control unit ( 122) and the compressor (121) are arranged side by side directly under the vehicle track (2), and the matching evaporator (112) is symmetrically arranged on both sides of the centrifugal evaporating fan (111), the condenser (123) and the condensing fan (124 ) are symmetrically arranged on both sides of the control unit (122); the bottom of the housing (1) below the control unit (122) is provided with an air supply port (125) connected to the passenger room of the carriage, and the air supply port (125) (13) It communicates with the air outlet of the centrifugal evaporative fan (111) to form a variable-capacity muffler air supply structure. 2. The low-noise air-conditioning unit for empty rail vehicles according to claim 1, characterized in that: a set of arc-shaped air deflectors (131) are arranged in the muffler elbow (13) along the air supply direction. 3. The low-noise air-conditioning unit for empty rail vehicles according to claim 2, characterized in that: the surface of the wind deflector (131) is wrapped with a sound-absorbing material layer. 4. The low-noise air-conditioning unit for empty rail vehicles according to claim 2, characterized in that: the inner wall of the noise-absorbing elbow (13) is provided with a sound-absorbing material layer. 5. A low-noise air-conditioning unit for empty rail vehicle according to claim 3 or 4, characterized in that: the sound-absorbing material layer is a glass cloth layer and an ultra-fine glass wool layer, and the glass cloth layer wraps the ultra-fine glass cotton layer. 6. A low-noise air-conditioning unit for empty rail vehicles according to claim 3 or 4, characterized in that: the sound-absorbing material layer is porous glass wool or slag wool. 7. A low-noise air-conditioning unit for empty rail vehicles according to any one of claims 1-4, characterized in that: the outer circumference of the noise-absorbing elbow (13) is wrapped with an elastic insulation layer. 8. A low-noise air-conditioning unit for empty rail vehicles according to claim 1, characterized in that: the centrifugal evaporator fan (111) is preloaded by means of a semi-flexible composite shock-absorbing base and the housing (1) limit. 9. A low-noise air-conditioning unit for empty rail vehicle according to claim 8, characterized in that: the semi-flexible composite shock-absorbing base includes a steel bottom layer, a flexible middle layer and a hard rubber layer, and the centrifugal An elastic damping mechanism is formed between the evaporation fan (111) and the casing (1). 10. A low-noise air-conditioning unit for empty rail vehicles according to claim 1, characterized in that: the ventilation system includes a return air outlet ( 113), the fresh air inlet (114) and the condensing air inlet and outlet (126, 127) located on the side wall of the housing (1), the fresh air sucked from the fresh air outlet (114) and the return air sucked from the compartment in the evaporator ( 112) Mixing on the air inlet side, two condensing air inlets (126) are set on the top of the housing (1) on the air inlet side of the condensing fan (124), on both sides of the vehicle track (2), and two condensing air outlets (127 ) is arranged on the side wall of the housing (1) on the air outlet side of the condenser (123).