CN103791589A - Method for judging whether multi-union air conditioning unit of heating mode is suffered from ice blockage due to water - Google Patents
Method for judging whether multi-union air conditioning unit of heating mode is suffered from ice blockage due to water Download PDFInfo
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- CN103791589A CN103791589A CN201410027541.3A CN201410027541A CN103791589A CN 103791589 A CN103791589 A CN 103791589A CN 201410027541 A CN201410027541 A CN 201410027541A CN 103791589 A CN103791589 A CN 103791589A
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Abstract
The invention discloses a method for judging whether a multi-union air conditioning unit of a heating mode is suffered from ice blockage due to water. The method specifically includes the following steps that a, all outdoor units (1) start up and operate, whether systems refrigerate normally is judged, and if the answer is positive, the next step is continued; b, when the outdoor temperature and the indoor temperature are both higher than 0 DEG C, one outdoor unit (1) starts up and operates, whether the system refrigerates normally is judged, and if the answer is positive, and the next step is continued; c, when the outdoor temperature and the indoor temperature are both lower than or equal to 0 DEG C, one outdoor unit (1) starts up and operates, whether the system refrigerates normally is judged, and if the answer is negative, a pressure sensor (3) of an inlet of a compressor (4) of the outdoor unit (2) records a low voltage fault, meanwhile, a temperature sensor (2) of an outlet of the compressor (4) records a high voltage fault, and it is judged that the faults are caused by excessive water in the systems. According to the method, an accurate judgment is made on the premise that system pipelines can not be taken apart.
Description
Technical field
The present invention relates to VRF Air Conditioning System, is specifically a kind of whether stifled method of ice due to water of VRF Air Conditioning System that judges heating mode.
Background technology
The VRF Air Conditioning System of prior art comprises multiple off-premises stations, multiple indoor set and connects two refrigerant circulation house stewards of each indoor set and each off-premises station, multiple off-premises station parallel connections, the off-premises station after parallel connection is communicated with the indoor set after parallel connection by two refrigerant circulation house stewards.
Each off-premises station comprises compressor, oil eliminator, four-way change-over valve, outdoor heat exchanger (being evaporimeter when heating mode), outer organic electronic expansion valve and gas-liquid separator.Compressor outlet is communicated with one end of oil eliminator, the other end of oil eliminator is communicated with the first valve port of four-way change-over valve, the 3rd valve port of four-way change-over valve is communicated with a refrigerant circulation house steward in two refrigerant circulation house stewards, another root refrigerant circulation house steward in two refrigerant circulation house stewards is communicated with one end of outer organic electronic expansion valve, the other end of outer organic electronic expansion valve is communicated with one end of outdoor heat exchanger, the other end of outdoor heat exchanger is communicated with the second valve port of four-way change-over valve, the 4th valve port of four-way change-over valve is connected with one end of gas-liquid separator, the other end of gas-liquid separator is communicated with suction port of compressor.When heating mode, the first valve port of four-way change-over valve is communicated with the 3rd valve port, the second valve port is communicated with the 4th valve port, and refrigerant is along compressor, indoor heat exchanger, interior organic electronic expansion valve, outer organic electronic expansion valve, outdoor heat exchanger, this route circulation of compressor.The entrance of compressor is provided with pressure sensor, and the outlet of compressor is provided with temperature sensor, and above-mentioned two sensors are all connected with the master controller of air-conditioning.
Each indoor set comprises interior organic electronic expansion valve and indoor heat exchanger (being condenser when heating mode), one end of indoor heat exchanger is communicated with one end of interior organic electronic expansion valve, the other end of interior organic electronic expansion valve is communicated with in two root refrigerants circulation house stewards one, and the house steward that circulates is communicated with for the other end of indoor heat exchanger and another root refrigerant in two root refrigerants circulation house stewards.
This VRF Air Conditioning System is the large system that relies on connecting pipe to be spliced into by multiple indoor sets and off-premises station.And install splicing pipeline process in, due to each pipeline be directly exposed to airborne, if humidity is excessive in air, airborne moisture naturally understand along with air enters air-conditioning system; Or, in the process of nitrogen pressurize leak detection, if nitrogen gas purity is low, mixes and have moisture, the moisture of this part also can enter into air-conditioning system.Once the excess moisture in air-conditioning system, in heating mode when operation,, freeze the outer outlet of organic electronic expansion valve in position that just easily caliber is less in system and the capillary inlet of the outdoor heat exchange coil pipe of off-premises station, produces ice and block up.Once the stifled situation of ice worsens, and just makes suction port of compressor refrigerant very few, the pressure sensor report low voltage failure of suction port of compressor, and system cannot normally heat.
The various detection means of current prior art, the reason that at all cannot judge directly and accurately fault under the prerequisite of not taking system pipeline apart is that the ice having caused in pipeline because system water is many is stifled, and the suitable trouble of the process of taking pipeline apart even causes secondary refrigerant leakage, therefore technical staff can first not take pipeline unless it is absolutely necessary apart, but after other various possible reasons are investigated one by one, finally just guess that fault causes because ice blocks up, and finally or after the pipeline of position stifled suspection generation ice can only being taken apart could confirm.But due to system do not heat and the reason of outer machine report low voltage failure too many, as outer machine fan failure causes other position obstruction of heat exchange deficiency, indoor heat exchanger or outdoor heat exchanger coil pipe, each connecting pipe obstruction, each sensor fault etc., objectively cause testing process quite loaded down with trivial details, waste time and energy, workload is large, and detection efficiency is low.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of whether stifled method of ice due to water of VRF Air Conditioning System that can judge directly and accurately heating mode under the prerequisite of not taking system pipeline apart is provided.
Technical solution of the present invention is, a kind of whether stifled method of ice due to water of VRF Air Conditioning System that judges heating mode is provided, and its concrete steps are as follows:
A, by whole off-premises station start operation, judge whether system normally heats, if not, judge that fault is not because excess moisture in system causes, if so, proceeds next step;
B, in the time that outdoor temperature and indoor temperature are all greater than 0 ℃, singly open an off-premises station operation, judge whether system normally heats, if not, judge that fault is not because excess moisture in system causes, if so, proceeds next step;
C, in the time that outdoor temperature and indoor temperature are all less than or equal to 0 ℃, singly open an off-premises station operation, judge whether system normally heats, if, judge that failure cause is not because excess moisture in system causes, if not, and there is the simultaneously temperature sensor of the outlet of the compressor reviewing knowledge already acquired barrier of offering a high price of pressure sensor report low voltage failure of the suction port of compressor of off-premises station, judge that fault causes just because of excess moisture in system.
This controlling party ratio juris is: in the time of whole off-premises station start operation, if can normally heat, other parts, each sensor and other pipelines of outdoor fan, indoor heat exchanger coil pipe, outdoor heat exchanger coil pipe that unit is just described is all normal, this has just discharged other most of reason, be very likely because system causes the stifled fault of ice containing dilutional hyponatremia, but also cannot finally determine, again with outdoor temperature and the equal 0 ℃ of description of indoor temperature, singly open an off-premises station operation, the moisture of whole system just concentrates in this off-premises station, if now outdoor temperature and indoor temperature are all higher than 0 ℃, system can normally heat, if outdoor temperature and indoor temperature are all less than or equal to 0 ℃, the capillary inlet of the inevitable heat exchange coil at this off-premises station of that intrasystem moisture and outside the outlet of organic electronic expansion valve freeze, cause system normally to heat, and outer machine suction port of compressor cold medium shortage and report low voltage failure, simultaneously compressor lacks the refrigerant nature that remains in operation and causes outlet temperature to rise, offer a high price reviewing knowledge already acquired barrier of the temperature sensor of this position, like this, the true cause of this unit fault is exactly well-determined.
Adopt above method, due to water, the stifled method of ice compared with prior art, has the following advantages the VRF Air Conditioning System that the present invention judges heating mode:
By the method, only need to meet: 1, off-premises station standard-sized sheet is normal; 2, singly open an off-premises station all also normal higher than 0 ℃ in outdoor temperature and indoor temperature; 3, singly open an off-premises station outdoor temperature and indoor temperature all less than or equal to 0 ℃ occur not heating, the fault of outer machine suction port of compressor low pressure, compressor outlet high temperature; These three factors, just can confirm under the prerequisite of not taking system pipeline apart that failure cause is that unit includes dilutional hyponatremia and the ice that causes is stifled directly, accurately, and its testing process is convenient, workload is little, time saving and energy saving, detection efficiency is high.
Accompanying drawing explanation
Fig. 1 is that due to water, the systematic schematic diagram of the stifled method of ice (has only shown an off-premises station to the present invention's VRF Air Conditioning System of judging heating mode in figure, but because all outdoor unit structure is all identical with connected mode, therefore omit other off-premises station in parallel).
Shown in figure 1, off-premises station, 2, temperature sensor, 3, pressure sensor, 4 compressors.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, the present invention judges the whether stifled method of ice due to water of VRF Air Conditioning System of heating mode, and its concrete steps are as follows.
A, by whole off-premises station 1 operation of starting shooting, judge whether system normally heats, if not, judge that fault is not because excess moisture in system causes, if so, proceeds next step.
B, in the time that outdoor temperature and indoor temperature are all greater than 0 ℃, singly open an off-premises station 1 and move, judge whether system normally heats, if not, judge that fault is not because excess moisture in system causes, if so, proceeds next step.Before the winter approached that those skilled in the art meeting of row heat at needs, when namely outdoor temperature and indoor temperature are all greater than 0 ℃, unit is tried to carry out out various customary detections, and trial run time can detect the situation that off-premises station 1 moves under this temperature conditions in passing, as the basis for estimation of the inventive method.
C, in the time that outdoor temperature and indoor temperature are all less than or equal to 0 ℃, singly opening an off-premises station 1 moves, judge whether system normally heats, if, judge that failure cause is not because excess moisture in system causes, if not, unit cannot normally heat, and the pressure sensor 3 that occurs compressor 4 entrances of off-premises station 1 is reported the simultaneously temperature sensor 2 of the outlet of the compressor 4 reviewing knowledge already acquired barrier of offering a high price of low voltage failure, judges that fault causes just because of excess moisture in system.
Once determine system excess moisture by the present invention, can cause ice stifled, technical staff just can directly take the measure of changing refrigerant to regulate.
Claims (1)
1. the whether stifled method of ice due to water of VRF Air Conditioning System that judges heating mode, is characterized in that: its concrete steps are as follows:
A, by whole off-premises station (1) start operation, judge whether system normally heats, if not, judge that fault is not because excess moisture in system causes, if so, proceeds next step;
B, in the time that outdoor temperature and indoor temperature are all greater than 0 ℃, singly open an off-premises station (1) operation, judge whether system normally heats, if not, judge that fault is not because excess moisture in system causes, if so, proceeds next step;
C, in the time that outdoor temperature and indoor temperature are all less than or equal to 0 ℃, singly open an off-premises station (1) operation, judge whether system normally heats, if, judge that failure cause is not because excess moisture in system causes, if not, and there is pressure sensor (3) the report low voltage failure temperature sensor (2) of the outlet of compressor (4) the reviewing knowledge already acquired barrier of offering a high price simultaneously of compressor (4) entrance of off-premises station (1), judge that fault causes just because of excess moisture in system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410027541.3A CN103791589B (en) | 2014-01-21 | 2014-01-21 | Judge the VRF Air Conditioning System method whether ice is stifled due to water of heating mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410027541.3A CN103791589B (en) | 2014-01-21 | 2014-01-21 | Judge the VRF Air Conditioning System method whether ice is stifled due to water of heating mode |
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| CN103791589A true CN103791589A (en) | 2014-05-14 |
| CN103791589B CN103791589B (en) | 2016-03-30 |
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| CN201410027541.3A Active CN103791589B (en) | 2014-01-21 | 2014-01-21 | Judge the VRF Air Conditioning System method whether ice is stifled due to water of heating mode |
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| CN107490156B (en) * | 2017-09-27 | 2019-09-20 | 广东美的暖通设备有限公司 | Three control air-conditionings and its method for diagnosing faults |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020124992A1 (en) * | 2001-03-12 | 2002-09-12 | Rainer Leo I. | Integrated ventilation cooling system |
| CN1782585A (en) * | 2004-11-30 | 2006-06-07 | 乐金电子(天津)电器有限公司 | One dragging more air conditioner and its control method |
| CN101464033A (en) * | 2007-12-19 | 2009-06-24 | 海尔集团公司 | Antifreeze method and system for indoor unit of air conditioner |
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2014
- 2014-01-21 CN CN201410027541.3A patent/CN103791589B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020124992A1 (en) * | 2001-03-12 | 2002-09-12 | Rainer Leo I. | Integrated ventilation cooling system |
| CN1782585A (en) * | 2004-11-30 | 2006-06-07 | 乐金电子(天津)电器有限公司 | One dragging more air conditioner and its control method |
| CN101464033A (en) * | 2007-12-19 | 2009-06-24 | 海尔集团公司 | Antifreeze method and system for indoor unit of air conditioner |
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| CN103791589B (en) | 2016-03-30 |
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Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Applicant after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Applicant before: Ningbo AUX Electric Co., Ltd. |
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