CN103792103B - The detection method of VRF Air Conditioning System - Google Patents
The detection method of VRF Air Conditioning System Download PDFInfo
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- CN103792103B CN103792103B CN201410026843.9A CN201410026843A CN103792103B CN 103792103 B CN103792103 B CN 103792103B CN 201410026843 A CN201410026843 A CN 201410026843A CN 103792103 B CN103792103 B CN 103792103B
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Abstract
The invention discloses a kind of detection method of VRF Air Conditioning System, its key step is: scanning off-premises station type bar code; The temperature difference of detected temperatures sensor and environment temperature; Detect compressor (1) heating tape power; Close outer organic electronic expansion valve (2) when heating, sensing chamber's external heat exchanger (3) force value fall also detects low tension switch; Close the blower fan of off-premises station during refrigeration, outdoor heat exchanger (3) pressure is raised to detect high-voltage switch gear; Open the increasing extent of temperature that oil return solenoid valve (4) detects oil return kapillary (5); Detected pressures sensor.This detection method malfunction elimination rate is high.
Description
Technical field
The present invention relates to VRF Air Conditioning System, is specifically a kind of detection method of VRF Air Conditioning System.
Background technology
Megastore, office building and factory's many employings central air conditioner and multiple unit regulate the room temperature.The VRF Air Conditioning System of prior art comprises multiple outdoor unit modules, multiple indoor set module and connects two refrigerant circulation house stewards of each indoor set module and each outdoor unit modules, multiple outdoor unit modules is in parallel, and the outdoor unit modules after parallel connection is communicated with the indoor set module after parallel connection by two refrigerant circulation house stewards.
Each outdoor unit modules comprises compressor, oil separator, four-way change-over valve, outdoor heat exchanger (is condenser during refrigeration mode, be evaporator during heating mode), outer organic electronic expansion valve and gas-liquid separator, compressor outlet is communicated with one end of oil separator, the other end of oil separator is communicated with the first valve port of four-way change-over valve, four-way change-over valve second valve port is communicated with outdoor heat exchanger one end, the outdoor heat exchanger other end is communicated with outer organic electronic expansion valve one end, one of circulating in house steward is communicated with for the outer organic electronic expansion valve other end and two root refrigerants, and another root refrigerant circulation house steward in two root refrigerant circulation house stewards is communicated with four-way change-over valve the 3rd valve port of each outdoor unit modules, four-way change-over valve the 4th valve port is connected with one end of gas-liquid separator, the other end of gas-liquid separator is communicated with suction port of compressor, each indoor set module comprises indoor heat exchanger (being condenser when being evaporator, heating mode during refrigeration mode), one that one end and two root refrigerants of indoor heat exchanger circulate in house steward is communicated with, and the house steward that circulates is communicated with for the other end and two root refrigerants another root refrigerant circulated in house steward of indoor heat exchanger.During refrigeration mode, the first valve port of four-way change-over valve is communicated with the second valve port, and the 3rd valve port is communicated with the 4th valve port, and namely refrigerant is along compressor, outdoor heat exchanger, indoor heat exchanger, the circulation of this route of compressor.During heating mode, the first valve port of four-way change-over valve is communicated with the 3rd valve port, and the second valve port is communicated with the 4th valve port, and namely refrigerant is along compressor, indoor heat exchanger, outdoor heat exchanger, the circulation of this route of compressor.
Except above-mentioned core component, VRF Air Conditioning System also comprises a large amount of utility appliance, as each sensor, high-voltage switch gear, low tension switch etc., compressor is also provided with the heating tape of heating lubricating oil, be provided with oil return kapillary between compressor and oil content, oil return kapillary is provided with oil return solenoid valve.Possess numerous core components and accessory just because of VRF Air Conditioning System, failure rate is higher, and once break down in user's use, is just difficult to investigation, is more difficult to short-term reparation.But prior art lacks the complete detection method of specialty, just before unit dispatches from the factory, is simply linked and packed, then running refrigerating or heat circulation, manually touches air outlet, sees and whether go out cold wind or hot blast.Therefore the detection method of prior art is too simple and crude, malfunction elimination rate is low, causes the failure rate of each parts after dispatching from the factory still higher, and maintenance workload is large, and maintenance cost is high.
Summary of the invention
The technical problem to be solved in the present invention is, provides the detection method of the much higher formula air-conditioner set of a kind of malfunction elimination rate.
Technical solution of the present invention is, provides a kind of detection method of VRF Air Conditioning System, and its concrete steps are as follows:
A, dispatch from the factory before, each indoor set of this unit is connected with off-premises station complete, then scans the type bar code of each off-premises station with barcode machine, as the type bar code that scans and designing requirement are not inconsistent, then determine off-premises station model mistake;
B, under non-open state, detect whole temperature sensors of this unit, the temperature that temperature sensor detects as existed and the temperature difference of environment temperature are greater than 10 DEG C, then determine the resistance loading error in this temperature sensor;
C, to be energized to unit, and guarantee that the heating tape of whole compressor is closed, then open the heating tape of each compressor one by one, whether the power lift-off value detecting unit equals the setting power of the heating tape of each compressor, as being not equal to, then judge the heating tape fault of this compressor;
D, normally run a period of time in a heating mode, then the outer organic electronic expansion valve of each off-premises station is closed one by one, whether the force value fall detecting each outdoor heat exchanger is greater than 0.3Mpa, if not, then judges that outer organic electronic expansion valve can not normally opening and closing; In this step, if when the force value of outdoor heat exchanger is greater than 0.15Mpa, the low tension switch tripping of this outdoor heat exchanger, then judge this low tension switch fault, if when the force value of outdoor heat exchanger is less than 0.1Mpa, the low tension switch of this outdoor heat exchanger is not jumped, then judge this low tension switch fault equally;
E, normally run a period of time in cooling mode, then the blower fan of each off-premises station is closed one by one, if when the force value of outdoor heat exchanger is less than 4.1Mpa, the high-voltage switch gear tripping of this outdoor heat exchanger, then judge this high-voltage switch gear fault, if when the force value of outdoor heat exchanger is greater than 4.1Mpa, the high-voltage switch gear of this outdoor heat exchanger is not jumped, then judge this high-voltage switch gear fault;
F, open the oil return solenoid valve of each compressor, and keep oil return solenoid valve open mode 10 minutes, if the temperature value ascensional range on the temperature sensor on the oil return kapillary of oil return solenoid valve back segment is less than 5 DEG C, then judge this oil return solenoid valve fault;
If g, in unit running process, high-pressure pressure sensor read value is less than low-pressure sensor read value, then judge pressure sensor failure.
Adopt above method, the detection method of VRF Air Conditioning System of the present invention compared with prior art, has the following advantages:
Pass through the method, can systematically carry out carefully detecting accurately to parts such as the especially outer type of all parts of this unit number, the heating tape of each temperature sensor, compressor, outer organic electronic expansion valve, low tension switch, high-voltage switch gear, high-pressure pressure sensor, low-pressure sensor, oil return solenoid valves, malfunction elimination rate is high, testing result accurately and reliably, can before dispatching from the factory as early as possible find and by malfunction elimination in bud, significantly reduce unit dispatch from the factory after failure rate, alleviate unit maintenance workload, reduce maintenance cost.
Accompanying drawing explanation
Fig. 1 be the detection method of VRF Air Conditioning System of the present invention systematic schematic diagram (illustrate only an off-premises station in figure, but due to whole outdoor unit structure and connected mode all identical, therefore omit the off-premises station of other parallel connection).
Shown in figure 1, compressor, 2, outer organic electronic expansion valve, 3, outdoor heat exchanger, 4, oil return solenoid valve, 5, oil return kapillary, 6, high-pressure pressure sensor, 7, low-pressure sensor.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, the detection method of VRF Air Conditioning System of the present invention, its concrete steps are as follows.
A, dispatch from the factory before, each indoor set of this unit is connected with off-premises station complete, then scans the type bar code of each off-premises station with barcode machine, as the type bar code that scans and designing requirement are not inconsistent, then determine off-premises station model mistake.The off-premises station of model mistake is dismantled, changes the off-premises station that model is correct.
B, under non-open state, detect whole temperature sensors of this unit, the temperature that temperature sensor detects as existed and the temperature difference of environment temperature are greater than 10 DEG C, then determine the resistance loading error in this temperature sensor; Change the resistance that resistance is correct, just can correct the mistake of this temperature sensor.The environment temperature of indoor set refers to indoor temperature, and the environment temperature of off-premises station refers to outdoor temperature.
C, to be energized to unit, and guarantee that the heating tape of whole compressor 1 is closed, then open the heating tape of each compressor 1 one by one, whether the power lift-off value detecting unit equals the setting power of the heating tape of each compressor 1, as being not equal to, then judge the heating tape fault of this compressor 1; Heating tape power as the compressor 1 of certain off-premises station is 30W, and opens separately the power opening rear whole unit in this heating tape and only improve 10W, then determine the underpower of this compressor 1 heating tape, have fault.
D, normally run a period of time in a heating mode, then the outer organic electronic expansion valve 2 of each off-premises station is closed one by one, whether the force value fall detecting each outdoor heat exchanger 3 is greater than 0.3Mpa, if not, then judges that outer organic electronic expansion valve 2 can not normally opening and closing; Its principle is, if the opening and closing function of this outer organic electronic expansion valve 2 is normal, then under heating mode, be switched to closedown from opening, the liquid refrigerants quantity entering into outdoor heat exchanger 3 declines, and then causes the gaseous coolant amount flashed to also to reduce, natural pressure can decline more than 0.3Mpa, if pressure drop underswing 0.3Mpa, then this outer organic electronic expansion valve 2 be described or can not open completely, or can not close completely.
In this step, if when the force value of outdoor heat exchanger 3 is greater than 0.15Mpa, the low tension switch tripping of this outdoor heat exchanger 3, then judge this low tension switch fault, if when the force value of outdoor heat exchanger 3 is less than 0.1Mpa, the low tension switch of this outdoor heat exchanger 3 is not jumped, then judge this low tension switch fault equally.
E, normally run a period of time in cooling mode, then the blower fan of each off-premises station is closed one by one, if when the force value of outdoor heat exchanger 3 is less than 4.1Mpa, the high-voltage switch gear tripping of this outdoor heat exchanger 3, then judge this high-voltage switch gear fault, if when the force value of outdoor heat exchanger 3 is greater than 4.1Mpa, the high-voltage switch gear of this outdoor heat exchanger 3 is not jumped, then judge this high-voltage switch gear fault.
F, open the oil return solenoid valve 4 of each compressor 1, and keep oil return solenoid valve 4 open mode 10 minutes, if the temperature value ascensional range on the temperature sensor on the oil return kapillary 5 of oil return solenoid valve 4 back segment is less than 5 DEG C, then judge this oil return solenoid valve 4 fault.This step principle is: oil return solenoid valve 4 is opened, the fluid that temperature is higher can enter oil return kapillary 5 through oil return solenoid valve 4, oil return kapillary 5 temperature is raised, and oil return solenoid valve 4 is closed, then the oil return kapillary 5 of oil return solenoid valve 4 back segment is interior can not exist fluid, and the temperature difference of two states should be greater than 5 DEG C, if the temperature difference is less than this value, oil return solenoid valve 4 be then described or cannot open completely, or cannot close completely.
If g, in unit running process, high-pressure pressure sensor 6 read value is less than low-pressure sensor 7 read value, then judge pressure sensor failure, namely low-pressure sensor 7 fault or high-pressure pressure sensor 6 fault or two pressure transducers all have fault.High-pressure pressure sensor 6 refers to the pressure transducer being arranged on compressor 1 and exporting, and low-pressure sensor 7 refers to the pressure transducer being arranged on compressor 1 entrance.
Claims (1)
1. a detection method for VRF Air Conditioning System, is characterized in that: its concrete steps are as follows:
A, dispatch from the factory before, each indoor set of this unit is connected with off-premises station complete, then scans the type bar code of each off-premises station with barcode machine, as the type bar code that scans and designing requirement are not inconsistent, then determine off-premises station model mistake;
B, under non-open state, detect whole temperature sensors of this unit, the temperature that temperature sensor detects as existed and the temperature difference of environment temperature are greater than 10 DEG C, then determine the resistance loading error in this temperature sensor;
C, to be energized to unit, and guarantee that the heating tape of whole compressor (1) is closed, then the heating tape of each compressor (1) is opened one by one, whether the power lift-off value detecting unit equals the setting power of the heating tape of each compressor (1), as being not equal to, then judge the heating tape fault of this compressor (1);
D, normally run a period of time in a heating mode, then the outer organic electronic expansion valve (2) of each off-premises station is closed one by one, whether the force value fall detecting each outdoor heat exchanger (3) is greater than 0.3Mpa, if not, then judge that outer organic electronic expansion valve (2) can not normally opening and closing; In this step, if when the force value of outdoor heat exchanger (3) is greater than 0.15Mpa, the low tension switch tripping of this outdoor heat exchanger (3), then judge this low tension switch fault, if when the force value of outdoor heat exchanger (3) is less than 0.1Mpa, the low tension switch of this outdoor heat exchanger (3) is not jumped, then judge this low tension switch fault equally;
E, normally run a period of time in cooling mode, then the blower fan of each off-premises station is closed one by one, if when the force value of outdoor heat exchanger (3) is less than 4.1Mpa, the high-voltage switch gear tripping of this outdoor heat exchanger (3), then judge this high-voltage switch gear fault, if when the force value of outdoor heat exchanger (3) is greater than 4.1Mpa, the high-voltage switch gear of this outdoor heat exchanger (3) is not jumped, then judge this high-voltage switch gear fault;
F, open the oil return solenoid valve (4) of each compressor (1), and keep oil return solenoid valve (4) open mode 10 minutes, if the temperature value ascensional range on the temperature sensor on the oil return kapillary (5) of oil return solenoid valve (4) back segment is less than 5 DEG C, then judge this oil return solenoid valve (4) fault;
If g, be arranged on high-pressure pressure sensor (6) read value that compressor (1) exports be less than low-pressure sensor (7) read value being arranged on compressor (1) entrance in unit running process, then judge pressure sensor failure.
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| CN104198203B (en) * | 2014-08-28 | 2017-10-31 | 广东美的制冷设备有限公司 | A kind of air conditioner operation detecting method and device |
| CN105065248B (en) * | 2015-08-19 | 2017-01-18 | 珠海格力电器股份有限公司 | Variable capacity compressor and control method |
| CN105241027B (en) * | 2015-10-30 | 2018-04-06 | 广东美的暖通设备有限公司 | The fault detection method of multiple on-line system and its valve body that exchanges heat |
| CN106500238B (en) * | 2016-09-12 | 2019-06-14 | 珠海格力电器股份有限公司 | Electronic expansion valve fault detection method and device and multi-online equipment system |
| CN108181124B (en) * | 2018-01-31 | 2023-05-05 | 深圳市艾特网能技术有限公司 | Air conditioning unit joint debugging tool system and control method thereof |
| CN110146318A (en) * | 2019-05-28 | 2019-08-20 | 格力电器（武汉）有限公司 | Method for solving low pressure testing force of entropy detection of air conditioner |
| CN110926544B (en) * | 2019-12-13 | 2021-08-17 | 浙江中广电器股份有限公司 | Detection equipment for heat exchanger unit and online automatic detection method thereof |
| CN111044305A (en) * | 2019-12-16 | 2020-04-21 | 江苏正理电器有限公司 | Outer entropy detection device of air conditioner |
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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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