CN102401447B - Method for processing disorderly closedown caused by partial blockage of inside pipeline of varied refrigerant volume (VRV) air-conditioning chamber - Google Patents
Method for processing disorderly closedown caused by partial blockage of inside pipeline of varied refrigerant volume (VRV) air-conditioning chamber Download PDFInfo
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- CN102401447B CN102401447B CN201110145124.5A CN201110145124A CN102401447B CN 102401447 B CN102401447 B CN 102401447B CN 201110145124 A CN201110145124 A CN 201110145124A CN 102401447 B CN102401447 B CN 102401447B
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Abstract
The invention discloses a method for processing the disorderly closedown caused by partial blockage of an inside pipeline of a varied refrigerant volume (VRV) air-conditioning chamber. The method is simple to examine the disorderly closedown of a VRV air-conditioning system, and is easy to discover the reason of a fault; interior decoration is also finished in actual operation when a VRV air-conditioner is finished installing, so that pipelines are not welded repeatedly as possible, and the pipelines are also not allowed in the field; or else, compensation cost after the decoration is damaged is very high. After the automatically regulated minimum opening degree of an electronic expansion valve is improved, so that the automatically regulated valve opening degree of the electronic expansion valve is matched with the flow rate of a system refrigerant; therefore, the normal operation of the VRV air-conditioning system can be ensured, and the phenomenon of the disorderly closedown, caused by the over-high pressure protection, of the system is avoided.
Description
Technical field
The present invention relates to a kind of VRV multi-gang air conditioner technical field, is specifically that a kind of VRV combined air conditioners indoor pipeline portions stops up the processing method that causes disorderly closedown.
Background technology
Current VRV(Varied Refrigerant Volume) multi-gang air conditioner refers to that an off-premises station drags a kind of air-conditioning system of many indoor sets, production and the installation requirement of this air-conditioning system to equipment is higher.If the welding procedure in production process or installation process such as indoor evaporator assemblies, electronic expansion valve module and branch pipe weld assembly does not reach requirement; just there will be pipeline to weld stifled situation; as complete stifled, half stifled and part is stifled etc.; easily cause air-conditioning system operational effect poor, the problems such as shutdown even break down.At present, when installing, using at air-conditioning, also above-mentioned fault is not investigated, only waited while going wrong, between each parts, carry out replacing blindly on probation, such as: first change magnetic valve, if system still has problem, could determine it is that management weldering is stifled, at this moment processing method is to change pipeline, not only cumbersome, and the change poles of following of pipeline is easily caused to damage to this air-conditioning system, therefore, how failure judgement reason and trouble point, seems and is even more important.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of VRV of solution combined air conditioners indoor pipeline portions to stop up the processing method that causes disorderly closedown.
Technical scheme of the present invention is, provides a kind of VRV combined air conditioners indoor pipeline portions with following steps to stop up the processing method that causes disorderly closedown, it is characterized in that: it comprises the following steps:
1), determine the indoor set that causes disorderly closedown:
VRV multi-gang air conditioner is powered on heating mode start, indoor set standard-sized sheet, air-conditioning system is normally moved, but while singly opening a certain indoor set, air-conditioning system operation exception, work after T1 minute, occurs the too high fault of system pressure and causes whole system shutdown;
2), to causing the too high indoor set that causes that the system failure is shut down of system pressure to be monitored, failure judgement is because electric expansion valve is stuck, or causes because the weldering of indoor pipeline portions is stifled:
Utilize debugging monitoring software, progressively manual adjustments electronic expansion valve opening, if significantly changing appears in the inlet temperature of indoor set and outlet temperature, can determine, electric expansion valve is normal, and stuck phenomenon does not occur, can determine and because pipeline weldering is stifled, cause system-down, otherwise, if significant change does not occur for indoor set inlet temperature and outlet temperature, can conclude and because electric expansion valve is stuck, cause system-down;
3), fault is solved:
When confirming that fault is while causing because electric expansion valve is stuck, the electric expansion valve more renewing is fixed a breakdown;
When confirming that fault is, while welding stifled causing due to pipeline, to improve the minimum aperture that electric expansion valve regulates automatically.
Adopt after such scheme, the present invention compared with prior art has following remarkable advantage and beneficial effect:
The investigation of the machine halt trouble to VRV multi-gang air conditioner is comparatively simple; be easy to look into out of order reason; because VRV combined air conditioners is installed after completion; in practical operation, interior decoration has also completed, therefore; the pipeline of trying not again to weld; scene is also unallowed, otherwise the reimbursement for expenses after destruction finishing is very high.And after improving the automatic minimum aperture of reconciling of electric expansion valve; valve opening and cooling system agent flux that electric expansion valve is regulated automatically match; just can guarantee VRV multi-gang air conditioner normal operation, avoid system that high voltage protective occurred and the phenomenon of shutting down.
The specific embodiment
Below in conjunction with one in accompanying drawing and Actual Air Conditioning Projects, drag four VRV multi-gang air conditioners (cold-producing medium R410A) to cause the processing method of system pressure superpressure fault to be described further to VRV combined air conditioners of the present invention indoor pipeline blockage.
1), determine the indoor set that causes fault:
One to drag four VRV combined air conditioners operational modes are heating modes, and outdoor environment temperature is 7 ℃ of left and right.When four indoor sets are all opened, VRV multi-gang air conditioner normal operation, occurs without any fault.But on that night, turn off other indoor set; when only a roomed indoor set is opened, after air-conditioning unit operation a period of time, such as: after about 10 minutes (being that T1 equals 10 minutes); the shutdown of breaking down of air-conditioning unit shows it is because high voltage fault is shut down on line control machine.On inspection, outdoor machine system pipeline is normal, and the stifled phenomenon of weldering, does not determine that failure problems still goes out at indoor pipeline;
After unit power-off, again start shooting, singly output the indoor set of existing high voltage fault.Air-conditioning unit operation about 10 minutes after, system high pressure rose to fast 42Bar from 23Bar in 2 minutes, reached high-voltage switch gear operating valve value, high-voltage switch gear disconnects, shutdowns of breaking down of air-conditioning unit shows high voltage fault shutdown on line control machine;
2), to causing the too high indoor set that causes that the system failure is shut down of system pressure to be monitored, failure judgement is because electric expansion valve is stuck, or causes because the weldering of indoor pipeline portions is stifled:
Judge whether electric expansion valve stuck fault occurs, method is: start again after unit power-off, singly open the indoor set breaking down, utilize debugging monitoring software to electronic expansion monitoring valves, progressively manual adjustments electronic expansion valve opening (under normal circumstances, the minimum aperture of electric expansion valve is set to 120 steps), electronic expansion valve opening, since 50 steps, regulates every 50 steps.Indoor machine evaporation heating mode inlet temperature is 68 ℃, and when electronic expansion valve opening is during in 50 step, outlet temperature is 26 ℃; When valve opening is 100 step, outlet temperature is 28 ℃; When valve opening is 150 step, outlet temperature is 31 ℃; When valve opening is 200 step, outlet temperature is 33 ℃; When valve opening is 250 step, outlet temperature is 36 ℃; When valve opening is 350 step, outlet temperature is 40 ℃; When valve opening is 400 step, outlet temperature is 44 ℃; When valve opening is 450 step, outlet temperature is 47 ℃.As can be seen here, there is significant change in indoor set import/export temperature T i and To, and indoor electronic expansion valve is working properly, and the situations such as stuck do not occur, and then definite generation obstruction is that lateral line weld generation weldering is blocked up;
Judge the stifled degree of pipeline weldering, and can solve the principle of fault by the minimum aperture that automatically regulates of electric expansion valve is set.Method is: unit power-off, re-power start, singly open indoor set this indoor electronic expansion valve initial opening of breaking down and be set to 300 step～350 steps, it is 120 steps that the minimum of electric expansion valve is reconciled aperture, start-up course finishes after (approximately 10 minutes), electronic expansion valve opening proceeds to automatic adjusting, and the aperture of electric expansion valve regulates according to the difference of import/export temperature T i and To.If indoor pipeline does not stop up and occurs and in situation smoothly; the aperture of electric expansion valve can be adjusted to 150 step～180 steps; now, cold-producing medium circulation and the compressor displacement of electric expansion valve match, and hypertonia disorderly closedown can not occur.If occurred but have on pipeline to stop up, due to the synergistic effect of throttling, the circulation of electric expansion valve is less than the circulation of system refrigerant, produces and suppresses high pressure effect, and system high pressure is raise fast, until exceed the protection value of high-voltage switch gear, shuts down.
According to above-mentioned principle, the minimum aperture that manually electric expansion valve regulates is automatically set to 280 steps when initial (be greater than 120 steps), and unit operation, after 10 minutes, proceeds to automatic control process.Electronic expansion valve opening free adjustment, the aperture of electric expansion valve is adjusted to 280 steps automatically from 350 initial steps, and air-conditioning unit normally moves.Air-conditioning unit continuous service 1 hour, still normally operation, does not break down;
In order to confirm the reliability of technical solution of the present invention, air-conditioning unit operational mode is gone to refrigeration mode, singly open this indoor set.The operation of air-conditioning unit refrigeration mode continues 1 hour, and any phenomenon of the failure does not occur yet.
And under refrigeration mode, standard-sized sheet indoor set moves, continue 1 hour, there is not any phenomenon of the failure.
Conversion operation pattern, under heating mode, standard-sized sheet indoor set moves, and continues 1 hour, and any phenomenon of the failure does not occur yet, and air-conditioning effect is also clearly.
By this example, show, technical scheme provided by the invention is feasible, and is effective.
Claims (1)
1. VRV combined air conditioners indoor pipeline portions stops up a processing method that causes disorderly closedown, it is characterized in that: it comprises the following steps:
1), determine the indoor set that causes disorderly closedown:
VRV multi-gang air conditioner is powered on heating mode start, indoor set standard-sized sheet, air-conditioning system is normally moved, but while singly opening a certain indoor set, air-conditioning system operation exception, work after T1 minute, occurs the too high fault of system pressure and causes whole system shutdown;
2), to causing the too high indoor set that causes that the system failure is shut down of system pressure to be monitored, failure judgement is because electric expansion valve is stuck, or causes because the weldering of indoor pipeline portions is stifled:
Utilize debugging monitoring software, progressively manual adjustments electronic expansion valve opening, if significantly changing appears in the inlet temperature of indoor set and outlet temperature, can determine, electric expansion valve is normal, and stuck phenomenon does not occur, can determine and because pipeline weldering is stifled, cause system-down, otherwise, if significant change does not occur for indoor set inlet temperature and outlet temperature, can conclude and because electric expansion valve is stuck, cause system-down;
3), fault is solved:
When confirming that fault is while causing because electric expansion valve is stuck, the electric expansion valve more renewing is fixed a breakdown;
When confirming that fault is, while welding stifled causing due to pipeline, to improve the minimum aperture that electric expansion valve regulates automatically.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110145124.5A CN102401447B (en) | 2011-05-24 | 2011-05-24 | Method for processing disorderly closedown caused by partial blockage of inside pipeline of varied refrigerant volume (VRV) air-conditioning chamber |
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| CN201110145124.5A CN102401447B (en) | 2011-05-24 | 2011-05-24 | Method for processing disorderly closedown caused by partial blockage of inside pipeline of varied refrigerant volume (VRV) air-conditioning chamber |
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| CN102401447A CN102401447A (en) | 2012-04-04 |
| CN102401447B true CN102401447B (en) | 2014-04-16 |
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| CN102829991A (en) * | 2012-09-21 | 2012-12-19 | 三一重机有限公司 | Fault detection system, fault detection method and module |
| CN103791586B (en) * | 2014-01-21 | 2016-06-08 | 宁波奥克斯电气股份有限公司 | Judge the VRF Air Conditioning System method whether ice is stifled due to water of refrigeration mode |
| CN104090831B (en) * | 2014-07-04 | 2017-12-29 | 珠海格力电器股份有限公司 | Method for self-checking welding blockage of dehumidifier |
| CN105091443B (en) * | 2015-08-31 | 2017-11-07 | 宁波奥克斯电气股份有限公司 | Multi-connected machine does not open the leak protection control method of electronic expansion valve of indoor unit |
| CN105465970A (en) * | 2015-12-31 | 2016-04-06 | 广东美的制冷设备有限公司 | Disposal method and disposal device for greasy blockage of air conditioner system and air conditioner |
| CN106352472B (en) * | 2016-08-19 | 2019-04-30 | 广东美的暖通设备有限公司 | Multi-line system and its linkage fault detection method |
| CN106440198B (en) * | 2016-09-26 | 2019-07-26 | 广东美的暖通设备有限公司 | The detection method of the throttle valve body of the indoor unit of air-conditioning system |
| CN109059369B (en) * | 2018-08-13 | 2020-10-27 | 宁波奥克斯电气股份有限公司 | Control method of air conditioner, multi-split air conditioning system and air conditioner |
| CN109297136B (en) * | 2018-11-14 | 2021-02-02 | 宁波奥克斯电气股份有限公司 | Expansion valve blockage judging method and air conditioner |
| CN109737654B (en) * | 2018-12-11 | 2024-01-23 | 珠海格力电器股份有限公司 | Blocking detection method and unit capable of detecting blocking |
| CN110567095B (en) * | 2019-08-22 | 2021-04-16 | 宁波奥克斯电气股份有限公司 | Method for detecting and controlling abnormity of electronic expansion valve of multi-connected indoor unit |
| CN111425996B (en) * | 2020-02-26 | 2022-11-22 | 青岛海尔空调电子有限公司 | Control method of air conditioner |
| CN111706959B (en) * | 2020-06-15 | 2022-03-29 | 青岛海尔空调器有限总公司 | Electronic expansion valve fault detection method and device for multi-split air conditioner and air conditioner |
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| CN1737448A (en) * | 2005-06-20 | 2006-02-22 | 珠海格力电器股份有限公司 | Air conditioner with refrigerant shortage and system blockage fault diagnosis function and diagnosis method |
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| KR100550566B1 (en) * | 2004-02-25 | 2006-02-10 | 엘지전자 주식회사 | A hotting drive method of heat pump multi-air conditioner |
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| CN1737448A (en) * | 2005-06-20 | 2006-02-22 | 珠海格力电器股份有限公司 | Air conditioner with refrigerant shortage and system blockage fault diagnosis function and diagnosis method |
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Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: Ningbo AUX Electric Co., Ltd. |