CN111023640A - Refrigerant detection filling device and method for air conditioning system of urban rail vehicle - Google Patents
Refrigerant detection filling device and method for air conditioning system of urban rail vehicle Download PDFInfo
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- CN111023640A CN111023640A CN201911125658.4A CN201911125658A CN111023640A CN 111023640 A CN111023640 A CN 111023640A CN 201911125658 A CN201911125658 A CN 201911125658A CN 111023640 A CN111023640 A CN 111023640A
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- refrigerant
- filling
- air conditioning
- rail vehicle
- urban rail
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B45/00—Arrangements for charging or discharging refrigerant
Abstract
A refrigerant detection and filling device and a refrigerant detection and filling method for an urban rail vehicle air conditioning system relate to an urban rail vehicle air conditioning system, and solve the problems that copper pipes are required to be cut off in the detection and filling modes of refrigerants in the conventional urban rail vehicle air conditioning system, the copper pipes are welded tightly after the detection and filling procedures are finished, the process is complicated, operation is required by professionals, leakage is easy to occur after welding, and the like; the liquid observation mirror is arranged at the downstream position of a drying filter in a refrigeration pipeline of the air conditioning unit, and the refrigerant filling valve is arranged at the side of a low-pressure side pipeline of the air conditioning unit; the refrigerant filling valve is internally provided with a through sealing structure and a protective copper cap, so that the refrigerant detection and filling mode of the existing air conditioning unit of the urban rail vehicle is optimized, the refrigerant is detected and filled in a simple, convenient and quick mode, the operation time of the refrigerant detection and filling process of the air conditioning unit is effectively shortened, and the defect that the process needs to be operated by professional personnel is overcome.
Description
Technical Field
The invention relates to an air conditioning system of an urban rail vehicle, in particular to a method for detecting and filling a refrigerant of the air conditioning system of the urban rail vehicle.
Background
The air conditioning system of the urban rail vehicle is mainly used for processing air in a carriage, so that dehumidification and cooling are achieved, and a comfortable riding environment is created for passengers. The refrigerating system of the air conditioning unit adopts a mechanical refrigerating method, and the system is formed by connecting a compressor, an outdoor heat exchanger, a thermostatic expansion valve, an indoor heat exchanger and other main parts by pipelines to form a closed system. In a closed system, a refrigerant is compressed into high-temperature and high-pressure superheated steam by a compressor, the superheated steam enters an outdoor heat exchanger, is forcibly cooled by outside air, is condensed into high-pressure liquid, enters a thermostatic expansion valve to be decompressed into low-temperature and low-pressure liquid, enters an indoor heat exchanger through a flow divider, absorbs the heat of the air passing through the indoor heat exchanger, is evaporated into low-pressure steam, is sucked by the compressor through a gas-liquid separator, is compressed into the high-temperature and high-pressure superheated steam again, and completes a refrigeration cycle. The refrigeration capacity in the closed system cannot be visually detected due to the structural limitation of the air conditioning unit, and the refrigerant in the pipeline needs to be charged and discharged in a mode of cutting the pipeline.
Cutting a copper pipe of a refrigeration pipeline, discharging a refrigerant in the pipeline, weighing the weight of the refrigerant by using a spring scale, and determining whether the refrigerant meets the refrigeration requirement, wherein the refrigerant needs to be refilled if the refrigerant does not meet the refrigeration requirement. In addition, the refrigerant storage tank needing to be filled is placed on a spring scale to be weighed, the weight of the filled refrigerant can meet the refrigeration requirement, the filling opening is connected with the high-pressure maintenance pipe opening, the refrigerant filled above the filling opening is ensured to be in a liquid state, and after the refrigerant is filled, copper pipes of a refrigeration pipeline are welded tightly, so that the sealing performance of the whole pipeline is ensured.
The existing detection and filling methods of the refrigerant need to cut a copper pipe, release the refrigerant for weighing detection and filling, and weld the copper pipe tightly after the detection and filling procedures are finished.
Disclosure of Invention
The invention provides a refrigerant detection and filling device and a refrigerant filling method for an air conditioning system of an urban rail vehicle, aiming at solving the problems that copper pipes are required to be cut off in the detection and filling modes of the existing air conditioning system of the urban rail vehicle, the copper pipes are welded tightly after the detection and filling procedures are finished, the process is complicated, operation is required by professionals, and leakage is easy to occur after welding.
The refrigerant detection and filling device of the air conditioning system of the urban rail vehicle comprises a liquid sight glass and a refrigerant filling valve; the liquid observation mirror is arranged at the downstream position of a drying filter in a refrigeration pipeline of the air conditioning unit, and the refrigerant filling valve is arranged on the side of a low-pressure side pipeline of the air conditioning unit; the refrigerant filling valve is internally provided with a through sealing structure and a protective copper cap.
The refrigerant detection and filling method for the air conditioning system of the urban rail vehicle is realized by the following steps:
welding a pipeline connecting end C of the refrigerant filling valve to the side of a low-pressure pipeline in a refrigerant filling pipeline inside an air conditioning unit;
step two, removing the protective copper cap of the pressure gauge mounting end D by using a wrench, taking out the internal valve core, and mounting the pressure gauge to the pressure gauge mounting end D;
step three, opening a filling valve locking end A by adopting a hexagonal wrench, and opening an internal channel of the refrigerant filling valve;
and step four, screwing out the nut of the refrigerant filling end B by using a wrench, taking out the internal protection copper cap, and installing the refrigerant filling pipeline at the refrigerant filling end B for refrigerant filling.
The invention has the beneficial effects that:
the liquid sight glass is added in the refrigeration pipeline of the existing air conditioning unit of the urban rail vehicle and used for indicating the refrigerant condition and the dryness of the liquid pipeline in the refrigeration device, and the refrigerant filling valve is added in the low-pressure side pipeline of the air conditioning unit, so that the refrigerant is conveniently released and filled. The detection and filling of the refrigerant are realized in a simple and quick manner.
The method optimizes the refrigerant detection and filling mode of the existing air conditioning unit of the urban rail vehicle, can realize the detection and filling of the refrigerant by using a simple and quick mode, can effectively shorten the operation time of the detection and filling process of the refrigerant of the air conditioning unit, and avoids the defect that the process needs to be operated by professional personnel.
Drawings
FIG. 1 is a schematic position diagram of a liquid viewing mirror in a refrigerant detection and filling device of an air conditioning system of an urban rail vehicle according to the invention;
FIG. 2 is a schematic structural diagram of a refrigerant filling valve in a refrigerant detection filling device of an air conditioning system of an urban rail vehicle, which is disclosed by the invention;
fig. 3 is an application schematic diagram of the refrigerant detection and filling device of the air conditioning system of the urban rail vehicle.
Detailed Description
In the first embodiment, the refrigerant detection and filling device of the air conditioning system of the urban rail vehicle is described with reference to fig. 1 to 3, and comprises a liquid viewing mirror 1 and a refrigerant filling valve 2; the liquid observation mirror 1 is arranged at the downstream position of a dry filter 3 in a refrigeration pipeline of the air conditioning unit, and the refrigerant filling valve 2 is arranged at the side of a low-pressure side pipeline of the air conditioning unit; the refrigerant charging valve 2 is internally provided with a through sealing structure and a protective copper cap.
In the embodiment described with reference to fig. 1, the liquid viewing mirror is mounted to the position of 100mm ± 10mm of the dry filter by brazing in the refrigeration pipeline of the air conditioning unit.
The embodiment is described with reference to fig. 2, a refrigerant filling valve 2 is added to a low-pressure side pipeline of an air conditioning unit, and a through sealing structure is arranged inside the refrigerant filling valve 2 and is provided with a filling valve cap, so that refrigerant leakage can be effectively prevented. When the air conditioner unit is tested and overhauled, the pressure of the system can be observed in real time by connecting an air conditioner pressure gauge. The refrigerant charging valve 2 is a four-way valve comprising a charging valve locking end A, a refrigerant charging end B, a pipeline connecting end C and a pressure gauge mounting end D.
The implementation mode is mainly an optimization process technology of the existing air conditioning unit refrigerant detection and filling mode of the urban rail vehicle, and does not relate to an additional installation technology of a refrigerant liquid window and a filling valve which are arranged in the new manufacturing process of a new air conditioning unit. The method is mainly used for protecting the existing air conditioning unit of the urban rail vehicle.
In a second embodiment, the present embodiment is described with reference to fig. 2 and 3, and the present embodiment is a filling method of a refrigerant detection filling device of an air conditioning system of an urban rail vehicle, which is described in the first embodiment, and the method is implemented by the following steps:
1. welding the pipeline connecting end C to the side of a low-pressure pipeline in a refrigerant filling pipeline inside the air conditioning unit through brazing;
2. the protective cap of the pressure gauge mounting end D is removed by a wrench, the inner valve core is taken out, the pressure gauge is mounted to the pressure gauge mounting end D, and good sealing and no leakage are ensured in the mounting process.
3. And (3) opening the locking end A of the filling valve by adopting a hexagonal wrench so as to open the internal channel of the filling valve.
4. And (4) screwing out the nut at the refrigerant filling end B by using a wrench to take out the internal protection copper cap, installing a refrigerant filling pipeline at the position, and filling the refrigerant.
Claims (5)
1. Refrigerant detection filling device of air conditioning system of urban rail vehicle, characterized by: comprises a liquid sight glass (1) and a refrigerant charging valve (2); the liquid observation mirror (1) is arranged at the downstream position of a dry filter (3) in a refrigeration pipeline of the air conditioning unit, and the refrigerant filling valve (2) is arranged at the side of a low-pressure side pipeline of the air conditioning unit; the refrigerant charging valve (2) is internally provided with a through sealing structure and a protective copper cap.
2. The refrigerant detection and filling device of the urban rail vehicle air conditioning system according to claim 1, characterized in that: the liquid sight glass (1) and the refrigerant charging valve (2) are installed in a brazing mode.
3. The refrigerant detection and filling device of the urban rail vehicle air conditioning system according to claim 1, characterized in that: the downstream position specifically refers to: the distance between the position of the liquid sight glass (1) and the dry filter is 100mm +/-10 mm.
4. The refrigerant detection and filling device of the urban rail vehicle air conditioning system according to claim 1, characterized in that: the refrigerant charging valve (2) is a four-way valve comprising a charging valve locking end A, a refrigerant charging end B, a pipeline connecting end C and a pressure gauge mounting end D.
5. The method for filling the refrigerant detection filling device of the urban rail vehicle air conditioning system according to any one of claims 1 to 4, characterized by comprising the following steps: the method is realized by the following steps:
welding a pipeline connecting end C of the refrigerant filling valve (2) to the side of a low-pressure pipeline in a refrigerant filling pipeline inside an air conditioning unit;
step two, removing the protective copper cap of the pressure gauge mounting end D by using a wrench, taking out the internal valve core, and mounting the pressure gauge to the pressure gauge mounting end D;
step three, opening a filling valve locking end A by adopting a hexagonal wrench, and opening an internal channel of the refrigerant filling valve;
and step four, screwing out the nut of the refrigerant filling end B by using a wrench, taking out the internal protection copper cap, and installing the refrigerant filling pipeline at the refrigerant filling end B for refrigerant filling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911125658.4A CN111023640A (en) | 2019-11-18 | 2019-11-18 | Refrigerant detection filling device and method for air conditioning system of urban rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911125658.4A CN111023640A (en) | 2019-11-18 | 2019-11-18 | Refrigerant detection filling device and method for air conditioning system of urban rail vehicle |
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| CN111023640A true CN111023640A (en) | 2020-04-17 |
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| CN201911125658.4A Pending CN111023640A (en) | 2019-11-18 | 2019-11-18 | Refrigerant detection filling device and method for air conditioning system of urban rail vehicle |
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| CN204987326U (en) * | 2015-08-21 | 2016-01-20 | 南京春荣节能科技有限公司 | Heat pipe air conditioner integral type heat transfer system |
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| US20180073647A1 (en) * | 2016-09-09 | 2018-03-15 | Prescott, Inc. | Multiple valve refrigerant leak protection device |
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2019
- 2019-11-18 CN CN201911125658.4A patent/CN111023640A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2208204Y (en) * | 1994-12-07 | 1995-09-20 | 华东工业大学 | Recovery, regenerative and recharging device for refrigerant |
| JP2001349646A (en) * | 2000-06-06 | 2001-12-21 | Fujitsu General Ltd | Two-way control valve with valve core |
| US20080190208A1 (en) * | 2006-09-29 | 2008-08-14 | Paul Appler | Vacuum gauge and refrigeration system service tool, and methods of using the same |
| KR20130065539A (en) * | 2011-12-10 | 2013-06-19 | 박미순 | A survice valve for a refrigerator |
| CN104344614A (en) * | 2013-07-24 | 2015-02-11 | 三菱电机株式会社 | Outdoor unit and air conditioning device |
| CN104421474A (en) * | 2013-08-19 | 2015-03-18 | 广东美的制冷设备有限公司 | Stop valve for air conditioner and air conditioner with same |
| CN204043101U (en) * | 2014-08-06 | 2014-12-24 | 新疆中兴能源有限公司 | A kind of computer-room air conditioning system with heat recovery function |
| CN204513871U (en) * | 2015-02-16 | 2015-07-29 | 上海大众祥源动力供应有限公司 | A kind of filling of the cold-producing medium for random air-conditioning refrigeration system energy-saving mechanism |
| CN204987326U (en) * | 2015-08-21 | 2016-01-20 | 南京春荣节能科技有限公司 | Heat pipe air conditioner integral type heat transfer system |
| US20180073647A1 (en) * | 2016-09-09 | 2018-03-15 | Prescott, Inc. | Multiple valve refrigerant leak protection device |
| CN206231391U (en) * | 2016-11-24 | 2017-06-09 | 上海松芝轨道车辆空调有限公司 | A kind of rail traffic vehicles air-conditioning condenser parallel system |
| CN108088012A (en) * | 2018-01-16 | 2018-05-29 | 克莱门特捷联制冷设备(上海)有限公司 | A kind of heat pipe combined type computer-room air conditioning system of frequency conversion and its control method |
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