CN111098875A

CN111098875A - Low-noise air conditioning unit for rail transit

Info

Publication number: CN111098875A
Application number: CN201911106978.5A
Authority: CN
Inventors: 孙永进; 沈兴华; 尹彩红; 姚静静; 翟光波
Original assignee: Shijiazhuang Guoxiang Transportation Equipment Co Ltd
Current assignee: Shijiazhuang Guoxiang Transportation Equipment Co Ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-05-05
Anticipated expiration: 2039-11-13
Also published as: CN111098875B

Abstract

The invention discloses a low-noise rail transit air conditioning unit, which belongs to the technical field of rail vehicle air conditioning units and comprises a box body with an evaporation cavity and a condensation cavity, wherein an air feeder, an evaporator and an electric heater are arranged in the evaporation cavity, a compressor, a condenser and a condensation fan are arranged in the condensation cavity, and the key points are that: the air feeder, the evaporator and the electric heater are sequentially arranged between the air return opening and the air supply opening in the evaporation cavity. The invention has the beneficial effects that: by changing the flowing mode of airflow between the air return inlet and the air supply outlet, the air feeder can be greatly far away from the air supply outlet, and the low-noise backward centrifugal fan is adopted, so that the noise at the air outlet of the unit can be greatly reduced, and more comfortable riding experience is provided for passengers; the whole air conditioning unit has low noise, low cost and low failure rate, and effectively improves the competitiveness of products.

Description

Low-noise air conditioning unit for rail transit

Technical Field

The invention belongs to the technical field of air conditioning equipment of rail vehicles, and particularly relates to a low-noise air conditioning unit for rail transit.

Background

In rail transit equipment, air conditioning units of vehicles generally adopt an overhead unit type air conditioning unit, and air return modes mainly comprise an end-sending end return mode, an end-sending bottom return mode and a bottom-sending bottom return mode.

For the bottom-feeding and bottom-returning type air conditioning device, only one air supply outlet and one or two air return inlets are usually arranged, the air supply blower is directly arranged right above the air supply outlet or forms an air supply cavity independently, the air outlet of the air supply blower is arranged at the position of a partition plate of the cavity, and air passes through the evaporator and the electric heater through the air suction effect of the air supply blower, so that the temperature of the air is reduced or increased.

In the existing air supply mode, the air supply blower is arranged at the tail end of the air flow, namely the air flow passes through the evaporator and the electric heater firstly, and finally, the air supply blower is arranged, and the distance between the air supply blower and the air supply outlet is the nearest end. In all projects, the index of indoor noise is the most strict, and the comfort feeling of indoor passengers is more and more emphasized at present, so the indoor noise requirement is more severe.

The air supply noise of the air conditioning unit contributes most to the noise of the air supply fan, and after the air volume is determined, the noise generated at the motor of the air supply fan is the largest noise source. And the conventional design leads to the air outlet of forced draught blower just to be the air outlet of unit at present, and its noise almost can transmit to indoor nothing shelters from. Although it is possible to develop a motor and a fan with low noise and optimize an air duct (increase sound absorption measures), it requires a long development time and a large cost.

Disclosure of Invention

The invention aims to solve the technical problem of providing a low-noise rail transit air conditioning unit, wherein a blower is arranged at a position far away from an air supply outlet, and the noise at the air supply outlet is effectively reduced by guiding the air outlet of the blower, designing a filter screen and the like.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a low noise track traffic air conditioning unit, is including the box that has evaporation chamber and condensation chamber be equipped with forced draught blower, evaporimeter and electric heater in the evaporation chamber be equipped with compressor, condenser and condensation fan in the condensation chamber, the key lies in: the air feeder, the evaporator and the electric heater are sequentially arranged between the air return opening and the air supply opening in the evaporation cavity.

The invention has the beneficial effects that: 1. by changing the flowing mode of airflow between the air return inlet and the air supply outlet, the air feeder can be greatly far away from the air supply outlet, and the low-noise backward centrifugal fan is adopted, so that the noise at the air outlet of the unit can be greatly reduced, and more comfortable riding experience is provided for passengers; 2. the air at the air outlet of the air feeder is combed by designing the guide plate and the first filter screen, so that the air uniformly passes through the evaporator and the electric heater; 3. the air supply air valve is provided with two air supply areas (namely a hot air supply port and a cold air supply port), and one air supply area is opened and the other air supply area is closed through an actuator, so that the cost is reduced; 4. the whole air conditioning unit has low noise, low cost and low failure rate, and effectively improves the competitiveness of products.

The present invention will be described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural diagram of a low noise rail transit air conditioning unit of the present invention;

FIG. 2 is a schematic structural diagram of components in an evaporation chamber of the low noise rail transit air conditioning unit of the present invention;

FIG. 3 is another schematic diagram of the structure of the components in the evaporation chamber of the low noise track traffic air conditioning unit of the present invention;

FIG. 4 is a schematic structural diagram of a first filter screen in the low noise rail transit air conditioning unit of the present invention;

FIG. 5 is a schematic structural diagram of an air supply valve in the low noise rail transit air conditioning unit of the present invention;

fig. 6 is a schematic structural diagram of a deflector in the low-noise rail transit air conditioning unit.

In the drawings: the air conditioner comprises a box body 1, an evaporation cavity 1-1, a condensation cavity 1-2, a mixing cavity 1-3, a blower 2, an evaporator 3, an electric heater 4, a compressor 5, a condenser 6, a condensation fan 7, a guide plate 8, a guide part 8-1, a main air supply hole 8-2, an air outlet hole 8-3, a first filter screen 9, a middle partition plate 10, a fresh air valve 11, a return air valve 12, a second filter screen 13, a water receiving disc 14, an air supply valve 15, an installation frame 15-1, a rotating shaft 15-2, blades 15-3, an actuator 15-4 and a partition plate 15-5.

Detailed Description

Referring to the attached drawings 1-3, the invention provides a low-noise rail transit air conditioning unit, which comprises a box body 1 with an evaporation cavity 1-1 and a condensation cavity 1-2, wherein a blower 2, an evaporator 3 and an electric heater 4 are arranged in the evaporation cavity 1-1, a compressor 5, a condenser 6 and a condensation fan 7 are arranged in the condensation cavity 1-2, and the key points are that: the blower 2, the evaporator 3 and the electric heater 4 are sequentially arranged between the air return opening and the air supply opening in the evaporation cavity 1-1. By arranging the blower 2 at a position away from the air supply opening, noise generated by the blower 2 is absorbed and attenuated in the middle process, so that the noise reaches the lowest level when reaching the air supply opening. The blower 2 is preferably a backward centrifugal blower.

Referring to fig. 2-4, a first screen 9 is provided between the outlet of the blower 2 and the evaporator 3. Specifically, in the present embodiment, two air blowers 2 are arranged side by side, a flow guide plate 8 is arranged between the air outlet of the air blower 2 and the evaporator 3, and a first filter screen 9 is arranged between the flow guide plate 8 and the evaporator 3. The structure of the first filter screen 9 comprises a frame, a filter material and a support, wherein the grade of the filter material adopts the grade of G2 to increase the resistance in the air supply cavity and form a static pressure cavity, and the air outlet of the two air blowers 2 is uniformly mixed, so that the air speed of each cross section blown out by the first filter screen 9 tends to be close, and the local air speed is prevented from being too high.

Referring to fig. 2, 3 and 6, a guide plate 8 is provided with a guide part 8-1 bent toward the air outlet of the blower 2, and a main air supply hole 8-2 is provided between the two guide parts 8-1. The flow guide part 8-1 is mainly used for guiding high-speed air which is over against the air outlet of the air feeder to two sides, so that the wind speed of the whole windward side of the evaporator 3 tends to be consistent, and the wind speed of the position, which is over against the air outlet of the air feeder, in the evaporator 3 is prevented from being too high. The main blowing hole 8-2 is a main blowing section which is offset from the air outlets of the two blowers 2. The flow guide part 8-1 is provided with an air outlet 8-3. The air outlet holes 8-3 are formed by punching and are uniformly arranged on the flow guide part 8-1 or the whole flow guide plate 8 so as to ensure that air is also exhausted from the air outlet.

Referring to fig. 1 and 2, a middle partition plate 10 is provided between the two blowers 2. The bottom of the middle partition board 10 is connected with the box body 1, and the top of the middle partition board is sealed with the inner side of a cover board (the cover board is not shown in the figure) of the box body 1, so that two independent air supply static pressure cavities are formed.

A mixing cavity 1-3 is arranged between the air inlet of the blower 2 and the side wall of the box body 1, a fresh air valve 11 communicated with the mixing cavity 1-3 is arranged on the box body 1, a return air inlet is arranged at the bottom of the mixing cavity 1-3 and is positioned at one side of the air inlet in the blower 2, a return air valve 12 is arranged at the return air inlet, and a second filter screen 13 is arranged between the return air valve 12 and the air inlet of the blower 2. The second filter screen 13 is the same in structure as the first filter screen 9, but has a different size according to the design position, and the grade of the filter material adopted in the filter screen is G3, and the filter screen is mainly used for filtering fresh air and return air.

Referring to fig. 1, 2 and 5, a supply air valve 15 is arranged at the supply air outlet, the supply air valve 15 comprises a mounting frame 15-1, a rotating shaft 15-2 uniformly arranged in the mounting frame 15-1, blades 15-3 arranged on the rotating shaft 15-2, a partition plate 15-5 arranged on the mounting frame 15-1 and dividing the blades 15-3 into at least two supply air areas, and an actuator 15-4 driving the rotating shaft 15-2 to rotate, and the installation angles of the blades 15-3 in the adjacent supply air areas and the rotating shaft 15-2 are different by 90 °. In this embodiment, three air supply areas are provided, wherein the air supply area is located in the middle, and the air supply areas are located on both sides of the air supply area. The actuator 15-4 includes a driving motor and a transmission assembly (the transmission assembly may be a gear transmission mechanism or a link mechanism) disposed between the driving motor and the rotating shaft 15-2. The difference between the installation angles of the blades 15-3 in the adjacent air supply areas and the rotating shaft 15-2 is 90 degrees, so that when the actuator 15-4 acts, only the air supply area or the hot air supply area is in an open state, and the other area is in a closed state. Compared with the prior art in which different air areas are independently controlled, the air supply air valve 15 saves 2 actuators, reduces the cost, can change 2 evaporators into one evaporator and 2 electric heaters into 1 evaporator, reduces the product weight, saves the cost and reduces the failure rate.

A water receiving tray 14 is arranged at the bottom of the electric heater 4 and used for collecting condensed water which is accidentally overflowed; by designing the angle and the size of the water pan 14, the disassembly and the assembly of the air supply air valve 15 are not influenced.

The working process of the air conditioning unit is as follows: after power-on, the blower 2 and the condensing fan 7 are started, and then the compressor 5 is started to drive the refrigerant to move in the pipeline. The opening of the return air valve 12 is controlled according to the temperature in the carriage to control the return air volume, the opening of the fresh air valve 11 is controlled according to the concentration of carbon dioxide in the carriage, the mixed air of fresh air and return air is filtered by the second filter screen 13, then is sent by the air feeder 2, guided by the guide plate 8, filtered and carded by the first filter screen 9, and the temperature of the evaporator 3 and the electric heater 4 is adjusted to enter the carriage again through the air sending area of the air sending valve 15 to realize the temperature adjustment in the carriage, thereby improving the comfort of passengers.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims

1. The utility model provides a low noise track traffic air conditioning unit, is including box (1) that has evaporation chamber (1-1) and condensation chamber (1-2) be equipped with forced draught blower (2), evaporimeter (3) and electric heater (4) in evaporation chamber (1-1) be equipped with compressor (5), condenser (6) and condensation fan (7) in condensation chamber (1-2), its characterized in that: the air feeder (2), the evaporator (3) and the electric heater (4) are sequentially arranged between an air return opening and an air supply opening in the evaporation cavity (1-1).

2. The low noise rail transit air conditioning unit of claim 1, wherein: a first filter screen (9) is arranged between the air outlet of the air feeder (2) and the evaporator (3).

3. The low noise rail transit air conditioning unit of claim 1, wherein: forced draught blower (2) are provided with two side by side forced draught blower (2) the air outlet with be equipped with guide plate (8) between evaporimeter (3) guide plate (8) with be equipped with first filter screen (9) between evaporimeter (3).

4. The low noise rail transit air conditioning unit of claim 3, wherein: the guide plate (8) is provided with a guide part (8-1) bent towards the air outlet of the blower (2), and a main air supply hole (8-2) is arranged between the two guide parts (8-1).

5. The low noise rail transit air conditioning unit of claim 4, wherein: the diversion part (8-1) is provided with an air outlet (8-3).

6. The low noise rail transit air conditioning unit of claim 3, wherein: a middle clapboard (10) is arranged between the two air blowers (2).

7. The low noise rail transit air conditioning unit of claim 3, wherein: the air inlet of forced draught blower (2) with be equipped with hybrid chamber (1-3) between the lateral wall of box (1) be equipped with on box (1) with the communicating new trend valve (11) of hybrid chamber (1-3), the return air inlet sets up at the bottom of the chamber of hybrid chamber (1-3) return air inlet department is equipped with return air valve (12) with be equipped with second filter screen (13) between the air inlet of forced draught blower (2).

8. The low noise rail transit air conditioning unit of claim 1, wherein: a water receiving tray (14) is arranged at the bottom of the electric heater (4).

9. The low noise rail transit air conditioning unit of any one of claims 1 to 8, wherein: the air supply opening is provided with an air supply air valve (15), the air supply air valve (15) comprises an installation frame (15-1), a rotating shaft (15-2) uniformly arranged in the installation frame (15-1), blades (15-3) arranged on the rotating shaft (15-2), a partition plate (15-5) arranged on the installation frame (15-1) and used for dividing the blades (15-3) into at least two air supply areas, and an actuator (15-4) used for driving the rotating shaft (15-2) to rotate, and the installation angle of the blades (15-3) in the adjacent air supply areas and the rotating shaft (15-2) is 90 degrees different.