CN103792103A - Testing method of multi-connecting type air conditioning unit - Google Patents
Testing method of multi-connecting type air conditioning unit Download PDFInfo
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- CN103792103A CN103792103A CN201410026843.9A CN201410026843A CN103792103A CN 103792103 A CN103792103 A CN 103792103A CN 201410026843 A CN201410026843 A CN 201410026843A CN 103792103 A CN103792103 A CN 103792103A
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Abstract
The invention discloses a testing method of a multi-connecting type air conditioning unit. The method mainly comprises the steps that an outdoor unit type bar code is scanned; temperature difference of a temperature sensor and environment temperature is detected; heating belt power of a compressor (1) is detected; during heating, an outer machine electronic expansion valve (2) is closed, the pressure value lowering range of an outdoor heat exchanger (3) is detected, and a low-pressure switch is detected; during cooling, a fan of an outdoor unit is closed, so that pressure of the outdoor heat exchanger (3) is raised, and a high-pressure switch is detected; an oil returning solenoid valve (4) is opened, and the temperature raising range of an oil returning capillary tube (5) is detected; and a pressure sensor is detected. The testing method is high in fault screening rate.
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
It is that multiple unit regulates the room temperature that megastore, office building and factory adopt central air conditioner more.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 parallel connections, 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 when refrigeration mode, when heating mode, be evaporator), 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 the 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, the outer organic electronic expansion valve other end is communicated with in two root refrigerants circulation house stewards one, and another root refrigerant circulation house steward in two root refrigerants 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 while being evaporator, heating mode when refrigeration mode), one end of indoor heat exchanger 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.When 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 refrigerant is along compressor, outdoor heat exchanger, indoor heat exchanger, this route circulation of compressor.When 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 refrigerant is along compressor, indoor heat exchanger, outdoor heat exchanger, this route circulation 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., on compressor, be also provided with the heating tape that heating lubricating oil is used, between compressor and oil content, be provided with oil return kapillary, 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, once and user use in break down, be just difficult to investigation, be 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 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 that the detection method of the much higher formula air-conditioning of a kind of malfunction elimination rate unit is provided.
Technical solution of the present invention is, a kind of detection method of VRF Air Conditioning System is provided, and its concrete steps are as follows:
A, dispatch from the factory before, each indoor set of this unit is connected complete with off-premises station, then scan the type bar code of each off-premises station with barcode machine, as the type bar code and the designing requirement that scan be not inconsistent, determine off-premises station model mistake;
B, under open state not, detect whole temperature sensors of this unit, as exist the temperature that temperature sensor detects to be greater than 10 ℃ with the temperature difference of environment temperature, the resistance loading error in definite this temperature sensor;
C, switch on to unit, and the heating tape of guaranteeing whole compressors closes, then open one by one the heating tape of each compressor, whether the power lift-off value that detects unit equals the setting power of the heating tape of each compressor, as be not equal to, judge the heating tape fault of this compressor;
D, under heating mode normal operation a period of time, then close one by one the outer organic electronic expansion valve of each off-premises station, whether the force value fall that detects each outdoor heat exchanger is greater than 0.3Mpa, if not, judges that outer organic electronic expansion valve can not normally open and close; 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, 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, and judges equally this low tension switch fault;
E, under refrigeration mode normal operation a period of time, then close one by one the blower fan of each off-premises station, 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, 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, and judges 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 ℃, judge this oil return solenoid valve fault;
If g, in unit running process, high-pressure sensor read value is less than low-pressure sensor read value, judges 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, systematically the parts such as the heating tape to the especially outer machine model of all parts of this unit, each temperature sensor, compressor, outer organic electronic expansion valve, low tension switch, high-voltage switch gear, high-pressure sensor, low-pressure sensor, oil return solenoid valve carry out carefully detecting accurately, malfunction elimination rate is high, testing result accurately and reliably, can be before dispatching from the factory find as early as possible and by malfunction elimination in bud, significantly reduce the failure rate after unit dispatches from the factory, alleviate unit maintenance workload, reduce maintenance cost.
Accompanying drawing explanation
Fig. 1 is the systematic schematic diagram (only shown an off-premises station in figure, but because all outdoor unit structures are all identical with connected mode, therefore omit other off-premises station in parallel) of the detection method of VRF Air Conditioning System of the present invention.
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 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 complete with off-premises station, then scan the type bar code of each off-premises station with barcode machine, as the type bar code and the designing requirement that scan be not inconsistent, determine off-premises station model mistake.The off-premises station of model mistake is dismantled, change the correct off-premises station of model.
B, under open state not, detect whole temperature sensors of this unit, as exist the temperature that temperature sensor detects to be greater than 10 ℃ with the temperature difference of environment temperature, the resistance loading error in definite this temperature sensor; Change the correct resistance of resistance, the mistake that just can correct 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, switch on to unit, and the heating tape of guaranteeing whole compressors 1 closes, then open one by one the heating tape of each compressor 1, whether the power lift-off value that detects unit equals the setting power of the heating tape of each compressor 1, as be not equal to, judge the heating tape fault of this compressor 1; If the heating tape power of the compressor 1 of certain off-premises station is 30W, only improve 10W and open separately the power of opening rear whole unit in this heating tape, determine the underpower of this compressor 1 heating tape, there is fault.
D, under heating mode normal operation a period of time, then close one by one the outer organic electronic expansion valve 2 of each off-premises station, whether the force value fall that detects each outdoor heat exchanger 3 is greater than 0.3Mpa, if not, judges that outer organic electronic expansion valve 2 can not normally open and close; Its principle is, if the switching function of this outer organic electronic expansion valve 2 is normal, under heating mode, close from opening to be switched to, the liquid refrigerants quantity that enters into outdoor heat exchanger 3 declines, and then causes the gaseous coolant amount flashing to also to reduce, natural pressure can decline more than 0.3Mpa, if pressure drop underswing 0.3Mpa, illustrates this outer organic electronic expansion valve 2 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, 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, and judges equally this low tension switch fault.
E, under refrigeration mode normal operation a period of time, then close one by one the blower fan of each off-premises station, 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, 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, and judges 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 segments is less than 5 ℃, judge this oil return solenoid valve 4 faults.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 are raise, and oil return solenoid valve 4 is closed, in the oil return kapillary 5 of oil return solenoid valve 4 back segments, can not have fluid, the temperature difference of two states should be greater than 5 ℃, if the temperature difference is less than this value, oil return solenoid valve 4 be described or cannot open completely, or cannot close completely.
If g, in unit running process, high-pressure sensor 6 read values are less than low-pressure sensor 7 read values, judge pressure sensor failure, low-pressure sensor 7 faults or high-pressure sensor 6 faults or two pressure transducers all have fault.High-pressure sensor 6 refers to and is arranged on the pressure transducer that compressor 1 exports, and low-pressure sensor 7 refers to the pressure transducer that is 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 complete with off-premises station, then scan the type bar code of each off-premises station with barcode machine, as the type bar code and the designing requirement that scan be not inconsistent, determine off-premises station model mistake;
B, under open state not, detect whole temperature sensors of this unit, as exist the temperature that temperature sensor detects to be greater than 10 ℃ with the temperature difference of environment temperature, the resistance loading error in definite this temperature sensor;
C, switch on to unit, and the heating tape of guaranteeing whole compressors (1) is closed, then open one by one the heating tape of each compressor (1), whether the power lift-off value that detects unit equals the setting power of the heating tape of each compressor (1), as be not equal to, judge the heating tape fault of this compressor (1);
D, under heating mode normal operation a period of time, then close one by one the outer organic electronic expansion valve (2) of each off-premises station, whether the force value fall that detects each outdoor heat exchanger (3) is greater than 0.3Mpa, if not, judges that outer organic electronic expansion valve (2) can not normally open and close; 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), 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, and judges equally this low tension switch fault;
E, under refrigeration mode normal operation a period of time, then close one by one the blower fan of each off-premises station, 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), 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, and judges 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 ℃, judge this oil return solenoid valve (4) fault;
If g, in unit running process, high-pressure sensor (6) read value is less than low-pressure sensor (7) read value, judges pressure sensor failure.
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Cited By (7)
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| CN104198203A (en) * | 2014-08-28 | 2014-12-10 | 广东美的制冷设备有限公司 | Method and device for detecting operation of air-conditioners |
| CN105065248A (en) * | 2015-08-19 | 2015-11-18 | 珠海格力电器股份有限公司 | Variable capacity compressor and control method |
| CN105241027A (en) * | 2015-10-30 | 2016-01-13 | 广东美的暖通设备有限公司 | Multi-split air-conditioning system and fault detection method for heat exchanging valves of multi-split air-conditioning system |
| CN106500238A (en) * | 2016-09-12 | 2017-03-15 | 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 |
| CN108181124A (en) * | 2018-01-31 | 2018-06-19 | 深圳市艾特网能技术有限公司 | A kind of air-conditioner set joint debugging fixture system and its control method |
| 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 |
| CN110926544A (en) * | 2019-12-13 | 2020-03-27 | 浙江中广电器股份有限公司 | Detection equipment for heat exchanger unit and online automatic detection method thereof |
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| JPH01189436A (en) * | 1988-01-22 | 1989-07-28 | Hitachi Ltd | Environmental test device |
| KR101203526B1 (en) * | 2010-09-06 | 2012-11-23 | 재단법인 부산테크노파크 | Performance test facilities of heat exchanger for High Temperature and Pressure |
| CN102692328B (en) * | 2011-03-24 | 2014-08-27 | 珠海格力电器股份有限公司 | Multi-split air conditioner detection system and method |
| CN102608523A (en) * | 2012-03-26 | 2012-07-25 | 宁波奥克斯空调有限公司 | Detection device used for circuit board of air conditioning frequency conversion module |
| CN102748832B (en) * | 2012-06-07 | 2014-09-17 | 宁波奥克斯电气有限公司 | Air conditioning fault detection method |
| CN103292520B (en) * | 2013-06-18 | 2015-11-18 | 宁波奥克斯电气有限公司 | Multi-online air-conditioning system oil balancing unit and control method |
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| CN104198203A (en) * | 2014-08-28 | 2014-12-10 | 广东美的制冷设备有限公司 | Method and device for detecting operation of air-conditioners |
| CN105065248A (en) * | 2015-08-19 | 2015-11-18 | 珠海格力电器股份有限公司 | Variable capacity compressor and control method |
| CN105241027A (en) * | 2015-10-30 | 2016-01-13 | 广东美的暖通设备有限公司 | Multi-split air-conditioning system and fault detection method for heat exchanging valves of multi-split air-conditioning system |
| 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 |
| CN106500238A (en) * | 2016-09-12 | 2017-03-15 | 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 |
| 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 |
| CN108181124A (en) * | 2018-01-31 | 2018-06-19 | 深圳市艾特网能技术有限公司 | A kind of air-conditioner set joint debugging fixture system and its control method |
| 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 |
| CN110926544A (en) * | 2019-12-13 | 2020-03-27 | 浙江中广电器股份有限公司 | Detection equipment for heat exchanger unit and online automatic detection method thereof |
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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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