CN102692302B - Method for detecting air conditioner of cab of high-speed train - Google Patents
Method for detecting air conditioner of cab of high-speed train Download PDFInfo
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- CN102692302B CN102692302B CN201210182823.1A CN201210182823A CN102692302B CN 102692302 B CN102692302 B CN 102692302B CN 201210182823 A CN201210182823 A CN 201210182823A CN 102692302 B CN102692302 B CN 102692302B
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Abstract
The invention provides a method for detecting an air conditioner of a cab of a high-speed train. The method comprises the following steps of: carrying out leakage point detection on three refrigerant pipelines between an evaporation unit and a condensation unit; washing and dewatering the three refrigerant pipelines after finishing the leakage point detection; connecting the three refrigerant pipelines between the evaporation unit and the condensation unit, and carrying out a pressure-maintaining seal test on the whole air conditioner, wherein the whole air conditioner comprises the evaporation unit, the condensation unit and the three refrigerant pipelines between the evaporation unit and the condensation unit; and after finishing the pressure-maintaining seal test, dewatering and vacuumizing the whole air conditioner, and finally charging a refrigerant. According to the method for detecting the air conditioner of the cab of the high-speed train, the assembled air conditioner of the cab can be sealed, dry, clean and free of impurities, thus the air conditioner is better ensured to reach an expected refrigeration effect after the air conditioner is in operation.
Description
Technical field
The present invention relates to machinery assembling detection field, relate in particular to a kind of detection method of bullet train air conditioner in cab.
Background technology
Train air conditioning system is the Main Means that regulates vehicle indoor environment and temperature, current train air-conditioning is generally unitary air conditioner unit, namely evaporation element and condensing unit are integrated, and aiming at cab, bullet train is provided with air conditioner in cab, for regulating driver's Interior Temperature Environment.
Air conditioner in cab is different from unitary air conditioner, is split-type air conditioner, is made up of with the condensing unit that is positioned at cab vehicle body bottom frame region an evaporation element being positioned on the inner car body roof of cab, and these two unit connect by refrigerant line.This makes unitary air conditioner and air conditioner in cab after assembling completes, and the method for detection is completely different.Unitary air conditioner is that two parts integrate, and can carry out overall package detection, and air conditioner in cab is split-type air conditioner, and refrigerant line welds ON TRAINS, therefore, can not detect air conditioner in cab by the method that unitary air conditioner assembling detects.
Also not for the special assembly detection method of split type driver's air-conditioning, this just can not ensure the refrigeration of high speed motor car air conditioner in cab after assembling completes at present.
Summary of the invention
For the defect of above-mentioned prior art, the invention provides a kind of detection method of bullet train air conditioner in cab.
The detection method that the invention provides a kind of bullet train air conditioner in cab, comprising:
Three refrigerant lines between evaporation element and condensing unit are carried out to leak source detection;
Carry out, after described leak source detection, described three refrigerant lines being cleaned and being dewatered;
Described three refrigerant lines are connected between described evaporation element and described condensing unit, air-conditioning entirety are carried out to pressurize leakage test, described air-conditioning entirety comprise described evaporation element, described condensing unit and between described three refrigerant lines;
Carry out after described pressurize leakage test, air-conditioning entirety is dewatered and vacuumized processing, be finally filled with cold-producing medium.
The detection method of bullet train air conditioner in cab provided by the invention, makes the air conditioner in cab sealing after assembling, dry, clean and inclusion-free, and then guaranteed that preferably air-conditioning can reach the refrigeration of expection after operation.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the detection method of embodiment of the present invention bullet train air conditioner in cab;
Embodiment
Fig. 1 is the schematic flow sheet of the detection method of embodiment of the present invention bullet train air conditioner in cab, and the detection method of a kind of bullet train air conditioner in cab of the present embodiment, comprises referring to Fig. 1:
Step 101: three refrigerant lines between evaporation element and condensing unit are carried out to leak source detection.
Whether the embodiment of the present invention detects refrigerant line by pressurize leakage test and seals, particularly:
Stifled with three interface UNICOMs, between three interfaces, pass through the mutual UNICOM of pipeline, three of connecting line one end flexible flange, shutoff refrigerant line; Two flexible flanges in the shutoff refrigerant line other end, are connected to refrigerant tank by the 3rd pipe, open refrigerant tank valve, allow cold-producing medium flow in pipeline until reach the first force value, then, close refrigerant tank valve.
Described the 3rd refrigerant line is connected with pressurize leakage test frock, adjusts reduction valve to the second force value, open hopper and allow in pipeline and be filled with nitrogen, until line pressure reaches the second force value.Valve-off, allows leak locator slowly scan on refrigerant line, will pay special attention to for pad.After leak locator is found leakage point, can use suds to be coated on pipeline to find position accurately.
Refrigerant line is kept to sealing, in pressurize Preset Time, pressure is remained in certain scope, if pressure exceeds certain scope, need to re-start leak detection test, until find out leak point.After detection, the gas described in emptying in three refrigerant lines.
Step 102: described three refrigerant lines are cleaned and dewatered.
Because refrigerant line itself is with greasy dirt, impurity, and welding after welding impurity.So must clean pipeline, particularly:
Keep being connected of the stifled one end with described three refrigerant lines of described three interface UNICOMs, dismantle the shutoff of two pipelines in three refrigerant line other ends and use the flange connection of double nip UNICOM instead, the 3rd pipeline is connected with a Ge Dan interface UNICOM flange.Connect cleaning device, inject certain clean-out system to refrigerant line, place after the regular hour, pipeline is cleaned repeatedly.After cleaning finishes, pull down to clean and put, blow out remaining clean-out system with high pure nitrogen, pull down three interface UNICOMs stifled, dry up with nitrogen, then dry up refrigerant line with high pure nitrogen.
Get off to ensure that refrigerant line is dry, need vacuumize pipeline.So, reconnecting three interface UNICOMs stifled, two pipelines in the other end of three refrigerant lines of shutoff again, are connected the 3rd pipeline with vacuum pump, and application vacuum pump vacuumizes described three refrigerant lines simultaneously.
Step 103: described three refrigerant lines are connected between described evaporation element and described condensing unit, air-conditioning entirety is carried out to pressurize leakage test, described air-conditioning entirety comprise described evaporation element, described condensing unit and between described three refrigerant lines.
Connect evaporation element, after condensing unit and refrigerant line, carry out sealing to the entirety of air conditioner in cab and test.Particularly:
Nitrogen discharge in three refrigerant lines is gone out, the air-conditioning charging valve on condensing unit is connected with pressurize leakage test frock, in air-conditioning entirety, be filled with nitrogen, until the pressure of air-conditioning whole interior reaches the 3rd force value.The pressurize regular hour, if without pressure drop, air conditioner in cab system is not revealed.
Step 104: carried out after described pressurize leakage test, air-conditioning entirety is dewatered and vacuumized processing, be finally filled with cold-producing medium.
Hunt leak after test passes in system, before charging refrigerant, must system be dewatered and be vacuumized.Vacuum pump and air-conditioning charging valve that vacuum meter is housed are connected respectively to the one end with valvular three-limb tube, and open corresponding valve, close the valve on the 3rd end of three-limb tube,, air and the moisture of the pipeline between vacuum pump and air-conditioning charging valve are vacuumized.Afterwards, open air-conditioning charging valve air-conditioning entirety is vacuumized, form after vacuum in system, continue to keep vacuumizing, until can reach dry requirement.Then close air-conditioning charging valve and vacuum pump.
After air-conditioning system reaches dry requirement, just can be filled with cold-producing medium to system.Particularly:
Keep being connected of described three-limb tube and vacuum pump and air-conditioning charging valve, refrigerant tank is connected with the 3rd end of described three-limb tube, and opens corresponding valve.
By vacuum pump, air and the moisture of the pipeline between refrigerant tank and air-conditioning charging valve are vacuumized.
Finally, open the valve on refrigerant tank, the mode that adopts inversion to be filled with is filled with refrigerated medium, until required weight.Dismounting vacuum pump and connecting line.
By the air conditioner in cab after assembling is carried out to above-mentioned a series of detection, ensure that air conditioner in cab is a sealing entirety, and ensure the clean dry inclusion-free of air conditioner in cab inside to have ensured that so preferably air-conditioning can reach the refrigeration of expection after operation.
In the time that refrigerant line is carried out to pressurize sealing experiment, be connected with one end of described three refrigerant lines stifled three interface UNICOMs, two pipelines described in shutoff in the other end of three refrigerant lines, described the 3rd pipeline is connected with pressurize leakage test frock, apply described pressurize leakage test frock and be filled with nitrogen in described three refrigerant lines, until the pressure in described three refrigerant lines reaches the second force value;
Application leak locator carries out leak source detection to described three refrigerant lines, and after pressurize Preset Time, then carries out leak source detection, after detection, and the gas described in emptying in three refrigerant lines.
After described the 3rd pipeline is connected with pressurize leakage test frock, adjust reduction valve to the second force value.Open hopper and allow in pipeline and be filled with nitrogen, until line pressure reaches the second force value.
In the embodiment of the present invention, the second force value can adopt 27.5bar pressure, with 27.5bar pressure carry out pressurize leakage test be because: the working pressure of air conditioner in cab, high pressure is 18-19bar, test pressure is about 1.5 times of working pressure, so pressurize seal test pressure is 27.5bar, can test like this pipeline intensity simultaneously.Described pressurize leakage test frock is made up of a High Purity Nitrogen gas cylinder, a reduction valve and a tensimeter.
At valve-off, after the test of hunting leak, pipeline is kept to sealing, and pressurize at least 12 hours.Consider the variation of nocturnal temperature, pressure should keep in the scope of +/-1bar.As go beyond the scope, need to re-start leak detection test, until find out leak point.
By three refrigerant lines of stifled UNICOM of three interface UNICOMs, can be simultaneously to the test of hunting leak of three pipelines.By pressurize leakage test, not only can detect that leak source can also test pipeline intensity.
Described the 3rd pipeline is connected with pressurize leakage test frock, apply described pressurize leakage test frock to before being filled with nitrogen in described three refrigerant lines, the 3rd pipeline is connected with refrigerant tank, apply described refrigerant tank and be filled with cold-producing medium in described three refrigerant lines, until the pressure in described three refrigerant lines reaches the first force value.
Be filled with nitrogen in three refrigerant lines before, stifled with three interface UNICOMs, connect three of refrigerant line one end flexible flange, shutoff refrigerant line; Two flexible flanges of the shutoff pipeline other end, another root pipe connects refrigerant tank, opens refrigerant tank valve, allows cold-producing medium flow in pipeline until then the first force value, closes the valve of cold-producing medium jar.The cold-producing medium injecting can be R134a, and described the first force value can be 0.5Bar.
Due to the stifled existence of three interface UNICOMs, can make to be also full of cold-producing medium in all the other two pipelines by a pipeline charging refrigerant.Be filled with nitrogen in three refrigerant lines before, inject cold-producing medium, can make leak locator leak source be detected rapidly, thereby improved the speed of leak detection.
Refrigerant line is completed after pressurize leakage test, keep being connected of the stifled one end with described three refrigerant lines of described three interface UNICOMs, dismantling in described three refrigerant line other ends two uses double nip UNICOM flange instead with the shutoff of pipeline and connects, described the 3rd pipeline is connected with a single flange, forms the mouth of a river and water inlet;
Be filled with clean-out system by described water inlet, described clean-out system flows through water delivering orifice described in described three refrigerant pipe routes and flows out; Exchanging water inlet and water outlet direction cleans repeatedly;
After cleaning finishes, application nitrogen blows out remaining clean-out system in described three refrigerant lines;
The lower described three interface UNICOMs of dismounting are stifled, and being filled with nitrogen downwards dewaters to described three refrigerant lines;
Reinstall described three interface UNICOMs stifled, two pipelines in the other end of three refrigerant lines described in shutoff again, described the 3rd pipeline is connected with vacuum pump, applies described vacuum pump described three refrigerant lines are vacuumized to processing.
In the time that refrigerant line is cleaned, the citric acid cleaning with 5% is best, and detergent line is carried out according to step once:
(1) connect cleaning device.
(2) citric acid that configuration concentration is 5%,, puts into the cleaning case of cleaning device by about 30 liters.
(3) to refrigerant line filling citric acid and place approximately 1 hour.
(4) place after one hour, switch on power, open into water and draining pipe valve, detergent line.In cleaning process, every three minutes, change the direction of a stream of water with operation valve, after 30 minutes, discharge citric acid cleaning liquid, when discharge, note not allowing cleaning fluid splash.
(5) pull down cleaning device, blow out residue cleaning fluid with high pure nitrogen.
(6) pull down three interface UNICOMs stifled, dry up with nitrogen, then dry up condensing agent pipeline with high pure nitrogen.Must be to blowing down from car, and observe car lower pipeline, block outlet with clean nonwoven fabrics, watch pipeline and whether clean up.
After refrigerant line has been cleaned, dewater to pipeline, need to vacuumize pipeline, according to following steps:.
(7) reconnect three interface UNICOMs and block up, and two refrigerant lines of the shutoff other end.
(8) connect the vacuum pump that vacuum meter is housed, three pipelines are vacuumized simultaneously.
(9) if reach stress level (the maximum 10mbar absolute pressures of stress level), just must give pipeline nitrogen injection, and sealing pipeline.
Refrigerant line is evacuated, can makes pipeline further dehumidify, finally reach the object of dehydration.
Nitrogen injection can keep pipeline inner dry.If connect evaporation element and condensing unit, need not give pipeline nitrogen injection at once.
After cleaning-drying completes, described three refrigerant lines are connected between described evaporation element and described condensing unit refrigerant line is carried out, air-conditioning entirety are carried out to pressurize leakage test and comprise:
Nitrogen discharge in described three refrigerant lines is gone out, air-conditioning charging valve on described condensing unit is connected with pressurize leakage test frock, apply described pressurize leakage test frock and be filled with nitrogen in air-conditioning entirety, until the pressure of air-conditioning whole interior reaches the 3rd force value.
The step of air conditioner in cab entire system pressurize leakage test comprises:
(1), by nitrogen discharge in pipeline, refrigerant line is connected with evaporation element and condensing unit.
(2) connect pressurize leakage test frock at air conditioner in cab charging valve, air conditioner in cab entirety is carried out to pressurize leakage test.Dwell pressure: be pressurized to the 3rd force value with high pure nitrogen, pressurize one hour, without pressure drop, air conditioner in cab system is not leaked.
The 3rd force value, generally with testing with 20bar pressure, is because just whether system being existed to leak detects, and does not carry out intensity detection.Therefore only use the working pressure a little more than cab system.By air conditioner in cab entire system pressurize leakage test, can guarantee that driver air conditioning chamber is the entirety of a sealing.
Carry out after described pressurize leakage test, vacuum pump and air-conditioning charging valve that vacuum agent is housed are connected respectively to the one end with valvular three-limb tube, and open corresponding valve, close the valve on the 3rd end of three-limb tube, air and the moisture of the pipeline between vacuum pump and air-conditioning charging valve are vacuumized;
In the system test passes of hunting leak, before charging refrigerant, must system be dewatered and be vacuumized, air-conditioning entirety is dewatered and vacuumized to process to be comprised:
Open air-conditioning charging valve air-conditioning entirety is vacuumized, then close air-conditioning charging valve and vacuum pump.Require as below 0.4mbar for the vacuum tightness of air conditioner in cab system.
The vacuum pump of recommendation two-stage: adding oiling and must carry out according to the guidance of vacuum pump about vacuum pump.Do not allow to open vacuum pump if in lubricated absence be.Pressure can be extracted into below 0.4mbar to the requirement of vacuum pump ability to work.
(1) first vacuum pump and air-conditioning charging valve that vacuum meter is housed are connected respectively to the one end with valvular three-limb tube, and open corresponding valve, close the valve on the 3rd end of three-limb tube.
(2) vacuum pump is vacuumized to air and moisture between the pipeline between charging valve.If max vacuum can be set up in several seconds, this method just can illustrate that vacuum pump is correct work so, and the not leakage of current that part can be described.
(3) open charging valve, allow vacuum pump start to vacuumize to system, when vacuum meter is shown as 0.4mbar or less reading, and what vacuum meter should show is a substantially constant reading, at this moment just formed vacuum, but or need continue keep vacuumize 3 hours, until system can reach dry requirement.Once complete the dehydration to system and vacuumize, inspection liquid-sighting glass, sees whether the dehydration of system completes.The color of liquid-sighting glass must be green, and green representative system is dried.
(4) vacuumize after end, close charging valve, close vacuum pump.
After whole detection completes, carry out charging refrigerant to air conditioner in cab system.First, refrigerant tank is connected with the 3rd end of described three-limb tube, and opens corresponding valve;
By vacuum pump, air and the moisture of the pipeline between refrigerant tank and air-conditioning charging valve are vacuumized;
Open the valve on refrigerant tank, the mode that adopts inversion to be filled with is filled with refrigerated medium.
The method of filling: keep being connected of described three-limb tube and vacuum pump and air-conditioning charging valve, refrigerant tank is connected to the 3rd end of described three-limb tube.Make three valves of described three-limb tube all in open mode.Open vacuum pump, pipeline is vacuumized.In the time that vacuum meter is shown as 0.4mbar or less reading, close the valve of described three-limb tube and vacuum pump link, close vacuum pump.
Open charging valve, adopt upside down to be filled with cold-producing medium to air conditioner in cab, until required weight.Close charging valve, dismounting vacuum pump and connecting line.
Cold-producing medium is the important component part of air conditioner in cab, is the key of refrigeration.The process of charging refrigerant must ensure sealing, can not mixing air.
When to refrigerant charging, by three-limb tube, to vacuumizing between refrigerant tank and air-conditioning charging valve, can ensure does not like this have other gas to sneak in the process that fills, refrigerant tank is inverted and is filled, and can preferentially ensure that cold-producing medium is liquid filled, thereby ensure refrigeration.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (6)
1. a detection method for bullet train air conditioner in cab, is characterized in that, comprising:
Three refrigerant lines between evaporation element and condensing unit are carried out to leak source detection;
Carry out, after described leak source detection, described three refrigerant lines being cleaned and being dewatered;
Described three refrigerant lines are connected between described evaporation element and described condensing unit, air-conditioning entirety are carried out to pressurize leakage test, described air-conditioning entirety comprise described evaporation element, described condensing unit and between described three refrigerant lines;
Carry out after described pressurize leakage test, air-conditioning entirety is dewatered and vacuumized processing, be finally filled with cold-producing medium;
Wherein, described to three refrigerant lines between evaporation element and condensing unit carry out leak source detect comprise:
Be connected with one end of described three refrigerant lines stifled three interface UNICOMs, two pipelines described in shutoff in the other end of three refrigerant lines, the 3rd pipeline is connected with pressurize leakage test frock, apply described pressurize leakage test frock and be filled with nitrogen in described three refrigerant lines, until the pressure in described three refrigerant lines reaches the second force value;
Application leak locator carries out leak source detection to described three refrigerant lines, and after pressurize Preset Time, then carries out leak source detection, after detection, and the gas described in emptying in three refrigerant lines.
2. method according to claim 1, is characterized in that, described described the 3rd pipeline is connected with pressurize leakage test frock, applies described pressurize leakage test frock to before being filled with nitrogen in described three refrigerant lines, and described method also comprises:
The 3rd pipeline is connected with refrigerant tank, applies described refrigerant tank and be filled with cold-producing medium in described three refrigerant lines, until the pressure in described three refrigerant lines reaches the first force value.
3. method according to claim 1 and 2, is characterized in that, described three refrigerant lines is cleaned and dewatered comprise:
Keep being connected of the stifled one end with described three refrigerant lines of described three interface UNICOMs, dismantle the shutoff of two pipelines in described three refrigerant line other ends and use the flange connection of double nip UNICOM instead, described the 3rd pipeline is connected with a single flange, forms the mouth of a river and water inlet;
Be filled with clean-out system by described water inlet, described clean-out system flows through water delivering orifice described in described three refrigerant pipe routes and flows out; Exchanging water inlet and water outlet direction cleans repeatedly;
After cleaning finishes, application nitrogen blows out remaining clean-out system in described three refrigerant lines;
The lower described three interface UNICOMs of dismounting are stifled, and being filled with nitrogen downwards dewaters to described three refrigerant lines;
Reinstall described three interface UNICOMs stifled, two pipelines in the other end of three refrigerant lines described in shutoff again, described the 3rd pipeline is connected with vacuum pump, applies described vacuum pump described three refrigerant lines are vacuumized to processing.
4. method according to claim 3, is characterized in that, described three refrigerant lines are connected between described evaporation element and described condensing unit, air-conditioning entirety is carried out to pressurize leakage test and comprise:
Nitrogen discharge in described three refrigerant lines is gone out, air-conditioning charging valve on described condensing unit is connected with pressurize leakage test frock, apply described pressurize leakage test frock and be filled with nitrogen in air-conditioning entirety, until the pressure of air-conditioning whole interior reaches the 3rd force value.
5. method according to claim 4, is characterized in that, described to air-conditioning entirety dewater and vacuumize process comprise:
Carry out after described pressurize leakage test, vacuum pump and air-conditioning charging valve that vacuum meter is housed are connected respectively to the one end with valvular three-limb tube, and open corresponding valve, close the valve on the 3rd end of three-limb tube, air and the moisture of the pipeline between vacuum pump and air-conditioning charging valve are vacuumized;
Open air-conditioning charging valve air-conditioning entirety is vacuumized, then close air-conditioning charging valve and vacuum pump.
6. method according to claim 5, is characterized in that, described in be filled with cold-producing medium and comprise:
Refrigerant tank is connected with the 3rd end of described three-limb tube, and opens corresponding valve;
By vacuum pump, air and the moisture of the pipeline between refrigerant tank and air-conditioning charging valve are vacuumized;
Open the valve on refrigerant tank, the mode that adopts inversion to be filled with is filled with refrigerated medium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210182823.1A CN102692302B (en) | 2012-06-05 | 2012-06-05 | Method for detecting air conditioner of cab of high-speed train |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210182823.1A CN102692302B (en) | 2012-06-05 | 2012-06-05 | Method for detecting air conditioner of cab of high-speed train |
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| CN102692302B true CN102692302B (en) | 2014-10-29 |
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| CN1098186A (en) * | 1993-03-29 | 1995-02-01 | 三洋电机株式会社 | The control device of air conditioner |
| KR100432224B1 (en) * | 2002-05-01 | 2004-05-20 | 삼성전자주식회사 | Refrigerant leakage detecting method for air conditioner |
| US6997013B2 (en) * | 2003-03-07 | 2006-02-14 | Shaw Aero Devices, Inc | Cooling system for an on-board inert gas generating system |
| CN102455243B (en) * | 2010-10-22 | 2013-12-25 | 珠海格力电器股份有限公司 | Air conditioning system leakage detection method |
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Address after: 063035 Hebei province Fengrun District Tangshan City Road No. 3 factory Patentee after: CRRC TANGSHAN CO., LTD. Address before: 063035 Hebei province Fengrun District Tangshan City Road No. 3 factory Patentee before: Tangshan Railway Vehicle Co., Ltd. |