CN216611199U - Dehumidification type rail vehicle air conditioning unit - Google Patents
Dehumidification type rail vehicle air conditioning unit Download PDFInfo
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- CN216611199U CN216611199U CN202122396483.XU CN202122396483U CN216611199U CN 216611199 U CN216611199 U CN 216611199U CN 202122396483 U CN202122396483 U CN 202122396483U CN 216611199 U CN216611199 U CN 216611199U
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Abstract
The utility model discloses a dehumidification type air conditioning unit for a railway vehicle, which comprises: the first pipeline comprises an evaporator and two expansion valves respectively connected with the evaporator, the two expansion valves are respectively connected with a liquid sight glass and a drying filter, and the two drying filters are respectively connected with a condenser; the second pipeline comprises a reheater and two electromagnetic valves respectively connected with the reheater, and the two electromagnetic valves are connected with the first pipeline between the compressor and the condenser through pipelines; and the third pipeline comprises the reheater and two one-way valves respectively connected with the reheater, and the two one-way valves are connected between the drying filter and the condenser of the first pipeline through pipelines. The high-temperature exhaust of the compressor is utilized to heat the low-temperature air out of the evaporator so as to improve the air supply temperature of the air conditioning unit.
Description
Technical Field
The utility model relates to the technical field of rail vehicle air conditioners, in particular to a dehumidification type rail vehicle air conditioning unit.
Background
The refrigeration air conditioning unit is an essential component of a railway vehicle, and the functions of the air conditioning unit are mainly concentrated on ventilation, refrigeration, heating and the like, and the dehumidification function is rarely paid particular attention to. Along with the development of science and technology and the improvement of the living standard of people, the requirement of people on the comfort level of the environment in the automobile is gradually improved, and the requirement of the air conditioning unit on the dehumidification function is increased day by day. Particularly in the south or higher altitude areas, the climate is warm, but the air humidity is higher, and at the moment, the air conditioner does not need to be started for refrigeration, only ventilation is needed, but the humid air is gathered in the carriage, so that people feel stuffy, hot, wet and sticky. If the refrigeration mode is started, the humidity in the vehicle can be reduced, but the temperature in the vehicle is reduced along with the humidity, so that people in the vehicle can feel overcooled. At present, part of air conditioning units are designed with an independent dehumidification function, the realization mode is that electric heating is adopted at the rear side of an evaporator, the electric energy consumption of the mode is large, and the energy-saving and environment-friendly idea is not met.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the embodiment of the utility model provides a dehumidification type air conditioning unit for a railway vehicle, which utilizes high-temperature exhaust gas of a compressor to heat low-temperature air discharged out of an evaporator so as to raise the air supply temperature of the air conditioning unit.
In order to achieve the above object, the embodiment of the present application discloses a dehumidification type air conditioning unit for a railway vehicle, including:
the first pipeline comprises an evaporator and two expansion valves respectively connected with the evaporator, the two expansion valves are respectively connected with a drying filter, the two drying filters are respectively connected with a condenser, the two condensers are respectively connected with a compressor, and the two compressors are respectively connected with the evaporator;
a low-pressure switch is arranged between the compressor and the evaporator, and a high-pressure switch and a maintenance valve are also arranged between the compressor and the condenser;
the second pipeline comprises a reheater and two electromagnetic valves respectively connected with the reheater, and the two electromagnetic valves are connected with the first pipeline between the compressor and the condenser through pipelines;
and the third pipeline comprises the reheater and two one-way valves respectively connected with the reheater, and the two one-way valves are connected between the drying filter and the condenser of the first pipeline through the third pipeline.
Preferably, a liquid viewing mirror is arranged between the expansion valve and the dry filter.
Preferably, a maintenance valve is further arranged between the compressor and the high-voltage switch.
Preferably, the air conditioning unit includes a compression condensation chamber, the compression condensation chamber contains the compressor, the condenser, the condensation fan, the drying filter.
Preferably, the air conditioning unit is including mixing the wind chamber, mix the wind chamber and include return air door subassembly, return air temperature and humidity sensor, mix wind filter screen, new trend door subassembly, new trend filter screen, new trend rain separator, look liquid mirror, high pressure switch, low pressure switch, maintenance valve and check valve.
Preferably, the air conditioning unit includes an evaporation cavity, and the evaporation cavity includes the expansion valve, the evaporator, the reheater, the evaporation fan, air supply temperature sensor and supply-air outlet etc..
The utility model has the following beneficial effects:
1. the air with higher humidity is cooled and dehumidified when flowing through the evaporator, the humidity of the air out of the evaporator is reduced, but the temperature is also reduced, namely the air supply temperature is low, and people feel uncomfortable; the low-temperature air of the evaporator is heated by the high-temperature exhaust of the compressor through the reheater, so that the air supply temperature is increased, and the comfort level of a human body is improved.
2. The reheater is used for replacing electric heating, high-temperature exhaust of the compressor is fully utilized, electric energy is saved, and the energy-saving and environment-friendly concept is met.
In order to make the aforementioned and other objects, features and advantages of the utility model comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a system schematic of a dehumidification type rail vehicle air conditioning unit in an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a dehumidification type air conditioning unit for a railway vehicle according to an embodiment of the present invention;
reference numerals of the above figures:
1. a compressor; 2. a condenser; 3. drying the filter; 4. a liquid viewing mirror; 5. an expansion valve; 6. an evaporator; 7. a reheater; 8. an evaporation fan; 9. a condensing fan; 10. an electromagnetic valve; 11. a high voltage switch; 12. a low voltage switch; 13. maintaining the valve; 14. a temperature and humidity sensor; 15. a fresh air temperature sensor; 16. an air supply temperature sensor; 17. a mixed air filter screen; 18. a fresh air door assembly; 19. a fresh air filter screen; 20. a fresh air and rainwater separator; 21. an air return door assembly; 22. a side fresh air port; 23. a bottom air return opening; 24. an air supply outlet; 25. a one-way valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
In order to achieve the purpose, the utility model provides a dehumidification type air conditioning unit for a railway vehicle.
In this embodiment, referring to fig. 1, the vehicle air conditioning unit includes two independent refrigeration systems, including two compressors, two condensers, an evaporator, a reheater, two drying filters, two sight glasses, two solenoid valves, two expansion valves, two check valves, two evaporation fans, and two condensation fans.
The first pipeline comprises an evaporator and two expansion valves respectively connected with the evaporator, the two expansion valves are respectively connected with a liquid viewing mirror and a drying filter, the two drying filters are respectively connected with a condensation cavity, the two condensers are respectively connected with a compressor, and the two compressors are respectively connected with the evaporator.
A low-pressure switch is arranged between the compressor and the evaporator, and a high-pressure switch and a maintenance valve are also arranged between the compressor and the condenser.
The second pipeline comprises a reheater and two electromagnetic valves respectively connected with the reheater, and the two electromagnetic valves are connected with the first pipeline between the compressor and the condenser through pipelines.
The third pipeline comprises the reheater and two one-way valves respectively connected with the reheater, and the two one-way valves are connected between the drying filter and the condenser of the first pipeline through pipelines.
The third pipeline is provided with a check valve and a reheater.
And a liquid viewing mirror is arranged between the expansion valve and the drying filter.
And a maintenance valve is also arranged between the compressor and the high-voltage switch.
The compression condensation cavity comprises the compressor, the condenser, a condensation fan and the drying filter.
The air mixing cavity comprises an air return door assembly, an air return temperature and humidity sensor, an air mixing filter screen, a fresh air door assembly, a fresh air filter screen, a fresh air rain separator, a liquid viewing mirror, a high-voltage switch, a low-voltage switch, a maintenance valve and a one-way valve.
The evaporation cavity comprises the expansion valve, the evaporator, the reheater, the evaporation fan, an air supply temperature sensor, an air supply outlet and the like.
The high-pressure switch 11 is arranged on a high-pressure side pipeline of the refrigerating system, plays a role in protecting the refrigerating system, and when the high pressure of the system is increased to a set value of the high-pressure switch 11, the high-pressure switch 11 acts, and the compressor 1 stops running; when the high pressure of the refrigeration system drops to the reset value of the high pressure switch 11, the compressor 1 is restarted.
The low-pressure switch 12 is arranged on a low-pressure side pipeline of the refrigeration system and plays a role in protecting the refrigeration system, when the low pressure of the system is reduced to a set value of the low-pressure switch 12, the low-pressure switch 12 acts, and the compressor 1 stops running; when the low pressure of the refrigeration system rises to the reset value of the low pressure switch 12, the compressor 1 is restarted.
The service valve 13 plays a service role in the refrigeration system, and vacuum pumping, refrigerant filling, system operation pressure detection, and the like can be performed through the service valve 13.
In the cooling mode, the solenoid valve 10 is closed, the compressor 1 exhausts air to flow into the condenser 2, the refrigerant liquid condensed in the condenser 2 sequentially flows through the dry filter 3, the liquid level indicator 4, the expansion valve 5, and then enters the evaporator 6, and the refrigerant vapor absorbing heat is evaporated in the evaporator 6 and returns to the compressor 1. The check valve 25 functions in this mode to prevent refrigerant flow into the reheater 7.
In the dehumidification mode, the electromagnetic valve 10 is opened, the exhaust gas of the compressor 1 is divided into two paths, one path flows into the condenser 2, the other path flows through the electromagnetic valve 10 and then enters the reheater 7, flows out of the reheater 7 and then flows through the one-way valve 25, the high-temperature and high-pressure refrigerant gas is mixed with the refrigerant condensed by the condenser 2 after being heated by the reheater 7 and exhausted by the evaporator 6, then flows through the drying filter 3, the liquid viewing mirror 4 and the expansion valve 5 together, then enters the evaporator 6, and the refrigerant steam after absorbing heat is evaporated in the evaporator 6 and returns to the compressor 1.
Referring to fig. 2, a temperature and humidity sensor 14 is installed at the air return opening for detecting the temperature and humidity of the return air in the vehicle, and when the detected temperature and humidity meet the requirement of the dehumidification starting mode, the air conditioning unit starts the dehumidification mode, and the electromagnetic valve 10 is opened.
Referring to fig. 2, the fresh air temperature sensor 15 is installed at the side fresh air inlet 22 for detecting the temperature of the fresh air; the air supply temperature sensor 16 is installed at the air supply outlet 24 and used for detecting the air supply temperature of the air conditioning unit.
Outdoor fresh air is sucked from a fresh air inlet 22 on the side, sequentially passes through a fresh air and rain separator 20 to separate rainwater, a fresh air door assembly 18 and a fresh air filter screen 19 to filter impurities, enters the air conditioning unit, is mixed with return air flowing from a return air inlet 23 at the bottom of the unit, sequentially passes through an air mixing filter screen 17, an evaporator 6 and a reheater 7, and is then sent into a vehicle through an evaporation fan 8. Wherein the fresh air door assembly 18 can adjust the fresh air door opening to adjust the fresh air inlet amount; the return air door assembly 21 can adjust the opening of the return air door to adjust the amount of the return air.
In the refrigeration mode, after entering the air conditioning unit from the side fresh air inlet 22, outdoor fresh air is mixed with return air sucked from the bottom return air inlet 23 of the unit, then flows through the air mixing filter screen 17 for filtering and dedusting, then flows through the evaporator 6 for cooling and dehumidification, then flows through the reheater 7, and then is sent into the vehicle through the air supply outlet 24 by the evaporation fan 8.
In the dehumidification mode, after entering the air conditioning unit from the side fresh air inlet 22, outdoor fresh air is mixed with return air sucked from the unit bottom return air inlet 23, then flows through the air mixing filter screen 17 for filtering and dedusting, then is cooled and dehumidified by the evaporator 6, then flows through the reheater 7 for raising the air supply temperature by utilizing high-temperature exhaust of the compressor 1, and the air after being heated is sent into the vehicle through the air supply outlet 24 by the evaporation fan 8.
The principle and the implementation mode of the utility model are explained by applying specific embodiments in the utility model, and the description of the embodiments is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. A dehumidification type rail vehicle air conditioning unit, comprising:
the first pipeline comprises an evaporator and two expansion valves respectively connected with the evaporator, the two expansion valves are respectively connected with a drying filter, the two drying filters are respectively connected with a condenser, the two condensers are respectively connected with a compressor, and the two compressors are respectively connected with the evaporator;
a low-pressure switch is arranged between the compressor and the evaporator, and a high-pressure switch and a maintenance valve are also arranged between the compressor and the condenser;
the second pipeline comprises a reheater and two electromagnetic valves respectively connected with the reheater, and the two electromagnetic valves are connected with the first pipeline between the compressor and the condenser through pipelines;
and the third pipeline comprises the reheater and two one-way valves respectively connected with the reheater, and the two one-way valves are connected between the drying filter and the condenser of the first pipeline through the third pipeline.
2. The dehumidification type air conditioning unit for a railway vehicle as claimed in claim 1, wherein a liquid sight glass is disposed between the expansion valve and the dry filter.
3. The dehumidification type railway vehicle air conditioning unit as claimed in claim 1, wherein a maintenance valve is further provided between the compressor and the high pressure switch.
4. The dehumidification type air conditioning unit for a railway vehicle as claimed in claim 1, wherein the air conditioning unit comprises a compression condensation chamber, and the compression condensation chamber comprises the compressor, the condenser, a condensation fan and the drying filter.
5. The dehumidification type rail vehicle air conditioning unit of claim 1, wherein the air conditioning unit comprises a mixing chamber, and the mixing chamber comprises a return air door assembly, a return air temperature and humidity sensor, a mixing filter screen, a fresh air door assembly, a fresh air filter screen, a fresh air rain separator, a sight glass, a high-voltage switch, a low-voltage switch, a maintenance valve and a one-way valve.
6. The dehumidification type air conditioning unit for a railway vehicle as claimed in claim 1, wherein the air conditioning unit comprises an evaporation chamber, the evaporation chamber comprising the expansion valve, the evaporator, the reheater, an evaporation fan, a supply air temperature sensor, and a supply air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122396483.XU CN216611199U (en) | 2021-09-30 | 2021-09-30 | Dehumidification type rail vehicle air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122396483.XU CN216611199U (en) | 2021-09-30 | 2021-09-30 | Dehumidification type rail vehicle air conditioning unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216611199U true CN216611199U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122396483.XU Active CN216611199U (en) | 2021-09-30 | 2021-09-30 | Dehumidification type rail vehicle air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216611199U (en) |
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2021
- 2021-09-30 CN CN202122396483.XU patent/CN216611199U/en active Active
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