CN103712749A - Method for detecting leakage rate of refrigerant of air conditioners in train - Google Patents
Method for detecting leakage rate of refrigerant of air conditioners in train Download PDFInfo
- Publication number
- CN103712749A CN103712749A CN201310730888.XA CN201310730888A CN103712749A CN 103712749 A CN103712749 A CN 103712749A CN 201310730888 A CN201310730888 A CN 201310730888A CN 103712749 A CN103712749 A CN 103712749A
- Authority
- CN
- China
- Prior art keywords
- air
- supercooling
- refrigerant
- degree
- conditioning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a method for detecting the leakage rate of refrigerant of air conditioners in a train, and relates to the technical field of methods for measuring the volume of liquid or gas. The method includes the following steps that firstly, the practical running environment of the train is simulated; secondly, on the premise that running performance of an air conditioner unit of the train is guaranteed, the filling amount of the refrigerant is reduced to the minimum working filling amount; thirdly, the system filling amount is gradually increased from the minimum working filling amount to rated filling amount of the air conditioner unit of the train; fourthly, collected degrees of supercooling of air conditioner systems are drawn into a curve chart; fifthly, the degree of supercoolling, corresponding to the minimum working filling amount, of the corresponding air conditioner system is found out according to the drawn curve chart. By the adoption of the method, whether the refrigerant is insufficient or not and how much the refrigerant needs to be refilled can be detected, the method is used for preventing the refrigerant of the system from being insufficient in advance, working reliability of the air conditioner unit is guaranteed, and environmental pollution and energy waste are reduced.
Description
Technical field
The present invention relates to measure the method and technology field of liquid or gas capacity, relate in particular to a kind of detection method of train air-conditioning refrigrant leakage amount.
Background technology
At present, domestic train air conditioning system is the automatic detection device to refrigrant leakage not, and the cold-producing medium of aircondition can leak out from the various valve bodies junction of system pipeline.Annual leakage rate is about 5g/ place.Leakage along with cold-producing medium, air-conditioning system will be in a scarce refrigerant condition, and at this moment refrigeration performance will be had a greatly reduced quality, and is all often during this time just to start the refrigerant charge in train air-conditioning unit to detect, judge that whether air-conditioning system lacks cold-producing medium, then fills.Yet the charging amount needing can not determine, general way is by system pump down, then again according to specified charging amount, fills.So first, can not meet comfortableness requirement; Secondly, the cold-producing medium of recovery generally can not recycle, and great majority are to be all discharged in air, to environment with to the energy, cause waste.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of detection method of train air-conditioning refrigrant leakage amount, described method can detect whether cold-producing medium lacks and the number of disappearance amount, in order to shift to an earlier date prevention system cold-producing medium disappearance, guarantee the reliability of air-conditioning unit work, reduce environmental pollution and energy dissipation.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of detection method of train air-conditioning refrigrant leakage amount, is characterized in that comprising the following steps:
(1) actual environment of simulating vehicle operation;
(2) guaranteeing under the prerequisite of train air-conditioning unit runnability, reducing refrigerant charge to minimum work charging amount, minimum work charging amount will be affected when refrigerant charge is less than the minimum refrigeration performance of train air-conditioning unit during charging amount of working;
(3) from minimum work charging amount, start progressively to increase system charging amount to the specified charging amount of train air-conditioning unit, under different charging amounts, turn round respectively in step (1) simulation actual environment, the line parameter of going forward side by side is measured, and records the degree of supercooling of air-conditioning system;
(4) the air-conditioning system degree of supercooling collecting is depicted as to curve map, as can be seen from the figure, the number of refrigerant charge and the degree of supercooling of air-conditioning system are proportional, are not subject to the impact of variation of ambient temperature;
(5) according to the curve map of drawing, find out the degree of supercooling size of the air-conditioning system that minimum work charging amount is corresponding, this value is for judging the judgment basis of air-conditioning system lack of refrigerant, if actual degree of supercooling is greater than degree of supercooling corresponding to minimum work charging amount, air-conditioning system is without charging refrigerant, if actual degree of supercooling is less than degree of supercooling corresponding to minimum work charging amount, air-conditioning system has to leak needs charging refrigerant, then according to the actual degree of supercooling recording, determines and needs filled refrigerant quality.
Preferably, in step (1), the environmental parameter of simulation comprises temperature, humidity and intensity of illumination.
Preferably, in step (1), the temperature range of simulation is 10 ℃-45 ℃.
Preferably, described minimum work charging amount is 85% of the specified charging amount of train air-conditioning unit.
The beneficial effect that adopts technique scheme to produce is: described method can be found out the degree of supercooling size of the corresponding air-conditioning system of minimum work charging amount, and this value is for judging the judgment basis of air-conditioning system lack of refrigerant.When degree of supercooling is less than judgment basis, think and during the running of train air-conditioning unit, can gather pressure and temperature parameter by sensor by train air-conditioning unit refrigrant leakage, calculate the size of degree of supercooling.Size by degree of supercooling can monitor cold-producing medium level in air-conditioning system very easily, thereby judge whether that this is to train air-conditioning unit charging refrigerant, and can draw the disappearance amount of cold-producing medium, in order to shift to an earlier date prevention system cold-producing medium disappearance, guarantee the reliability of air-conditioning group work, can also avoid cold-producing medium to enter in air, reduce environmental pollution and energy dissipation.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is degree of supercooling and the refrigerant charge curve map that the present invention draws.
Embodiment
A detection method for train air-conditioning refrigrant leakage amount, comprises the following steps: the actual environment of (1) simulating vehicle operation, and the environmental parameter of simulation comprises temperature, humidity and intensity of illumination etc., wherein the temperature range of simulation is 10 ℃-45 ℃; (2) guaranteeing under the prerequisite of train air-conditioning unit runnability, reduce gradually refrigerant charge to minimum work charging amount, minimum work charging amount when refrigerant charge is less than minimum work charging amount the refrigeration performance of train air-conditioning unit will be affected, the minimum charging amount of working is generally 85% of the specified charging amount of train air-conditioning unit; (3) from minimum work charging amount, start progressively to increase system charging amount to the specified charging amount of train air-conditioning unit, under different charging amounts, in step (1) simulation actual environment, parameter measurement is carried out in running respectively, records the degree of supercooling of air-conditioning system; (4) the air-conditioning system degree of supercooling collecting is depicted as to curve map, as shown in Figure 1, as can be seen from the figure, the number of refrigerant charge and the degree of supercooling of air-conditioning system are proportional, are not subject to the impact of variation of ambient temperature; (5) according to the curve map of drawing, find out the degree of supercooling size of the air-conditioning system that minimum work charging amount is corresponding, this value is for judging the judgment basis of air-conditioning system lack of refrigerant, if actual degree of supercooling is greater than degree of supercooling corresponding to minimum work charging amount, air-conditioning system is without charging refrigerant, if actual degree of supercooling is less than degree of supercooling corresponding to minimum work charging amount, air-conditioning system has to leak needs charging refrigerant, then according to the actual degree of supercooling recording, determines and needs filled refrigerant quality.
Following table is actual environment operating mode table, there is no sun load intensity in environmental working condition table, because: one, solar radiation causes vehicle interior temperature to raise, and is finally reflected on return air temperature; Two, air-conditioning unit can not detect intensity of solar radiation.
In the process of actual motion, the specified refrigerant charge of setting some air-conditioning systems is 3.4kg, and its minimum work charging amount is 2.89kg(3.4kg*85%).Choose minimum charging amount neighbouring 2.8kg and 3.0kg unit is filled, test respectively under varying environment operating mode, data are as follows:
Test result shows equally, and under different charging amounts, the degree of supercooling of air-conditioning unit is different, not affected by environmental working condition, only with cold-producing medium number relevant.
Preparatory stage: the relation of Air-conditioner design stage test degree of supercooling and different charging amounts, finds standard-" the minimum charging amount of working " corresponding degree of supercooling of judging air-conditioning system and leaking.In conjunction with Fig. 1, show that minimum work charging amount is 2.8kg, corresponding degree of supercooling is 5～7 ℃.Therefore judge that the standard that air-conditioning system is leaked is system degree of supercooling≤4 ℃.Air-conditioning system hardware configuration: at train air-conditioning unit exhaust outlet of compressor place installation high-voltage pressure unit, installation pipeline temperature sensor on condensator outlet pipeline.Degree of supercooling is calculated: the controller of application train air-conditioning unit self is processed the data that gather from high-pressure transmitter and pipeline temperature sensor, calculates degree of supercooling size now.Refrigrant leakage judgement: the controller of air-conditioning self compares calculating 4 ℃ of the size of gained degree of supercooling and criterion.When calculate degree of supercooling be greater than criterion illustrative system without leakage.Otherwise illustrative system leaks, and needs charging refrigerant, meanwhile, controller starts alert notice driver.
Described method can be found out the degree of supercooling size of the corresponding air-conditioning system of minimum work charging amount, and this value is for judging the judgment basis of air-conditioning system lack of refrigerant.When degree of supercooling is less than judgment basis, think train air-conditioning unit refrigrant leakage.During the running of train air-conditioning unit, can gather pressure and temperature parameter by sensor, calculate the size of degree of supercooling.Size by degree of supercooling can monitor cold-producing medium level in air-conditioning system very easily, thereby judge whether that this is to train air-conditioning unit charging refrigerant, and can draw the disappearance amount of cold-producing medium, in order to shift to an earlier date prevention system cold-producing medium disappearance, guarantee the reliability of air-conditioning group work, can also avoid cold-producing medium to enter in air, reduce environmental pollution and energy dissipation.
Applied specific case herein principle of the present invention and embodiment thereof are set forth, the explanation of above embodiment is just with helping understand method of the present invention and core concept thereof.It should be pointed out that for the person of ordinary skill of the art, can also carry out some improvement and modification to the present invention under the premise without departing from the principles of the invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (4)
1. a detection method for train air-conditioning refrigrant leakage amount, is characterized in that comprising the following steps:
(1) actual environment of simulating vehicle operation;
(2) guaranteeing under the prerequisite of train air-conditioning unit runnability, reducing refrigerant charge to minimum work charging amount, minimum work charging amount will be affected when refrigerant charge is less than the minimum refrigeration performance of train air-conditioning unit during charging amount of working;
(3) from minimum work charging amount, start progressively to increase system charging amount to the specified charging amount of train air-conditioning unit, under different charging amounts, turn round respectively in the actual environment of step (1) simulation, the line parameter of going forward side by side is measured, and records the degree of supercooling of air-conditioning system;
(4) the air-conditioning system degree of supercooling collecting is depicted as to curve map, as can be seen from the figure, the number of refrigerant charge and the degree of supercooling of air-conditioning system are proportional, are not subject to the impact of variation of ambient temperature;
(5) according to the curve map of drawing, find out the degree of supercooling size of the air-conditioning system that minimum work charging amount is corresponding, this value is for judging the judgment basis of air-conditioning system lack of refrigerant, if actual degree of supercooling is greater than degree of supercooling corresponding to minimum work charging amount, air-conditioning system is without charging refrigerant, if actual degree of supercooling is less than degree of supercooling corresponding to minimum work charging amount, air-conditioning system has to leak needs charging refrigerant, then according to the actual degree of supercooling recording, determines and needs filled refrigerant quality.
2. the detection method of train air-conditioning refrigrant leakage amount according to claim 1, is characterized in that: in step (1), the environmental parameter of simulation comprises temperature, humidity and intensity of illumination.
3. the detection method of train air-conditioning refrigrant leakage amount according to claim 2, is characterized in that: in step (1), the temperature range of simulation is 10 ℃-45 ℃.
4. the detection method of train air-conditioning refrigrant leakage amount according to claim 1, is characterized in that: described minimum work charging amount is 85% of the specified charging amount of train air-conditioning unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310730888.XA CN103712749A (en) | 2013-12-26 | 2013-12-26 | Method for detecting leakage rate of refrigerant of air conditioners in train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310730888.XA CN103712749A (en) | 2013-12-26 | 2013-12-26 | Method for detecting leakage rate of refrigerant of air conditioners in train |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103712749A true CN103712749A (en) | 2014-04-09 |
Family
ID=50405902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310730888.XA Pending CN103712749A (en) | 2013-12-26 | 2013-12-26 | Method for detecting leakage rate of refrigerant of air conditioners in train |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103712749A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676855A (en) * | 2015-02-28 | 2015-06-03 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner and coolant leakage detection method thereof |
| CN106198043A (en) * | 2016-06-28 | 2016-12-07 | 河南师范大学 | A kind of vehicle air conditioner refrigerant filling volume calibration method |
| CN110857811A (en) * | 2018-08-24 | 2020-03-03 | 奥克斯空调股份有限公司 | Air conditioner and air conditioner refrigerant leakage detection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006023072A (en) * | 2004-06-11 | 2006-01-26 | Daikin Ind Ltd | Air conditioner |
| CN102077042A (en) * | 2008-06-27 | 2011-05-25 | 大金工业株式会社 | Method for judging amount of refrigerant of air conditioner and air conditioner |
| CN102667352A (en) * | 2009-11-11 | 2012-09-12 | 爱默生零售服务公司 | Refrigerant leak detection system and method |
-
2013
- 2013-12-26 CN CN201310730888.XA patent/CN103712749A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006023072A (en) * | 2004-06-11 | 2006-01-26 | Daikin Ind Ltd | Air conditioner |
| CN102077042A (en) * | 2008-06-27 | 2011-05-25 | 大金工业株式会社 | Method for judging amount of refrigerant of air conditioner and air conditioner |
| CN102667352A (en) * | 2009-11-11 | 2012-09-12 | 爱默生零售服务公司 | Refrigerant leak detection system and method |
Non-Patent Citations (2)
| Title |
|---|
| 于凯等: "实车空调系统最佳制冷剂量的试验研究", 《长春理工大学学报（自然科学牌）》 * |
| 徐国权等: "轿车空调系统制冷剂加注量实验研究", 《高等学校工程热物理第十九届全国学术会议论文集》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676855A (en) * | 2015-02-28 | 2015-06-03 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner and coolant leakage detection method thereof |
| CN104676855B (en) * | 2015-02-28 | 2017-10-10 | 广东美的制冷设备有限公司 | Transducer air conditioning and its coolant leakage detection method |
| CN106198043A (en) * | 2016-06-28 | 2016-12-07 | 河南师范大学 | A kind of vehicle air conditioner refrigerant filling volume calibration method |
| CN110857811A (en) * | 2018-08-24 | 2020-03-03 | 奥克斯空调股份有限公司 | Air conditioner and air conditioner refrigerant leakage detection method |
| CN110857811B (en) * | 2018-08-24 | 2021-05-18 | 奥克斯空调股份有限公司 | Air conditioner and air conditioner refrigerant leakage detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103293010B (en) | Method and device and system for detecting air conditioner coolants | |
| CN107504732B (en) | Method and device for judging quantity of refrigerant in refrigeration system | |
| CN111006355B (en) | Air conditioning unit and running state monitoring method and device thereof | |
| CN110500708B (en) | Refrigerant leakage detection method and system for air conditioning system | |
| CN202769873U (en) | System used to judge lack of air conditioner refrigerant | |
| CN105698284B (en) | Air-conditioning system and its refrigeration control method and device | |
| CN101775454B (en) | Blast-furnace tuyere leakage monitoring and alarming system | |
| CN104819547A (en) | Method and system for fluorine lacking detection and protection during startup of variable frequency air-conditioning system | |
| CN103884480A (en) | Refrigerant leak detection method, refrigerant leak detection system and air conditioner | |
| CN104964384A (en) | Fluorine-deficient detection and protection method and system during operation of variable-frequency air-conditioning system | |
| CN103363617B (en) | The detection method of air conditioner lacks fluorine and device and air-conditioner | |
| US10429266B2 (en) | Leak detection in a fluid compression system | |
| CN103673398B (en) | The oil return condition detection method of compressor return oil system and compressor | |
| CN104949411A (en) | Device and method for detecting quantity of refrigerants and air-conditioner with device for detecting quantity of refrigerants | |
| CN105674507A (en) | Method and device for detecting refrigerants of air conditioner | |
| CN107906672B (en) | Refrigerant quantity judging method and system | |
| CN107906671B (en) | Refrigerant quantity judging method and system | |
| CN206361881U (en) | A kind of air conditioning for automobiles operational efficiency detecting system | |
| CN110822629B (en) | Air conditioner refrigerant leakage detection method, air conditioner and readable storage medium | |
| US20190316800A1 (en) | Data processing method, refrigerant leakage detection method, system failure detection method and system performance detection method | |
| CN103969280A (en) | Refrigerant abnormity detection method and air conditioner | |
| CN110375466B (en) | Device and method for detecting refrigerant leakage of air source heat pump system | |
| CN103712749A (en) | Method for detecting leakage rate of refrigerant of air conditioners in train | |
| CN107702291B (en) | Refrigerant charging control method and system and air conditioner | |
| CN110940091B (en) | Fluorine deficiency judgment method and heat pump water heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140409 |
|
| RJ01 | Rejection of invention patent application after publication |