CN101561208B - Method for controlling oil return of air conditioners - Google Patents
Method for controlling oil return of air conditioners Download PDFInfo
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- CN101561208B CN101561208B CN200910098834XA CN200910098834A CN101561208B CN 101561208 B CN101561208 B CN 101561208B CN 200910098834X A CN200910098834X A CN 200910098834XA CN 200910098834 A CN200910098834 A CN 200910098834A CN 101561208 B CN101561208 B CN 101561208B
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Abstract
The invention discloses a method for controlling oil return of air conditioners. The method mainly comprises the following steps that: a technician judges whether an air conditioner needs oil-return control according to an installation fall H of the air conditioner and correspondingly sets the air conditioner; the air conditioner does not need oil-return control when H is less than 8 meters; the air conditioner needs oil-return control when H is more than or equal to 8 meters and less than 16 meters, and when the accumulated refrigeration time T of the air conditioner is more than 6 hours, a main control board controls an indoor fan to stop for 2 minutes and then run at low speed for 1 minute; the air conditioner also needs oil-return control when H is more than or equal to 16 meters, and when the accumulated refrigeration time T of the air conditioner is more than 6 hours, the main control board controls the indoor fan to stop for 3 minutes and then run at low speed for 2 minutes; lubricating oil is driven to return to a gas-liquid separator through liquid refrigerant in an evaporator and then return to a compressor through an oil-return hole of the gas-liquid separator; and then the indoor fan is restored to original wind speed. The method has the advantages of ensuring that the air conditioner can reliably return oil without using oil-return bends, providing convenience for the installation of the air conditioner and reducing construction cost.
Description
Technical field
The present invention relates to a kind of oil return method, the specifically a kind of method for controlling oil return of fixed frequency air conditioner device system under refrigeration mode that be applied to.
Background technology
Lubricating oil in the cooler compressor is very important to the normal operation of compressor, compressor is in the process of compression, effects such as that lubricating oil plays is lubricated, cooling, sealing, the deficiency of lubricating oil will cause compressor abrasion to increase, compressor reduces service life, internal temperature is too high, faults such as burn-down of electric motor.
During compressor operation, lubricating oil can be taken it out of compressor and enters in the other system parts such as condenser in the system and evaporimeter inevitably along with flowing of cold-producing medium, if when existing in lubricating oil in the system and can not return compressor continuously, will cause the compressor pasta to descend, the problem of lubricating oil deficiency occur.So guarantee that it is one of most important problem in the refrigerant system design that refrigeration oil returns compressor continuously.
In air-conditioner evaporator, liquid refrigerant is evaporated to gas, and wherein Rong Xie lubricating oil will gradate and be vaporific oil droplet, need could turn back to compressor constantly under the drive of the gaseous refrigerant of fair speed.When the horizontal level of evaporimeter in the air-conditioner system when the horizontal level of compressor is following, big height fall will make the lubricating oil in the evaporimeter turn back to compressor sufficiently along muffler, causes the oil return of system bad.Relatively large fixed frequency air conditioner device has all strictly been stipulated the drop height of installing, and require at the drop height during greater than 8 meters left and right sides, it is curved to weld oil return on the muffler of air-conditioner, reliable oil return with safeguards system, and oil return pipe is made up of the pipeline of bending, it will be welded on the muffler very inconveniently, this has brought bigger inconvenience for undoubtedly the installation of air-conditioner, has also just increased operating expenses simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of air-conditioner system that can ensure not using reliably oil return under the curved situation of oil return, also is very easy to the installation of air-conditioner, and the while has also been reduced the method for controlling oil return of the air-conditioner of construction cost.
Technical solution of the present invention is, a kind of method for controlling oil return of air-conditioner is provided, and the installation drop of establishing air-conditioner is H, and described installation drop H is the setting height(from bottom) of the setting height(from bottom)-indoor set of off-premises station; If the accumulated running time of air-conditioner is T, air-conditioner running time T=0 that powers on for the first time then, concrete control operation pattern is:
1., when H＜8m, the technical staff judges not needs oil return control and the control that air-conditioner carries out not oil return set of air-conditioner according to the installation drop of air-conditioner, under the pattern of refrigerating operaton, the microprocessor of air-conditioner does not carry out special oil return operation to air-conditioner system according to technical staff's setting;
2., when 8m≤H＜16m, the technical staff judges that according to the installation drop of air-conditioner the air-conditioner needs carry out oil return control and air-conditioner is carried out corresponding oil return control setting, under the pattern of refrigerating operaton, when the microprocessor of air-conditioner judges that according to technical staff's setting system's needs of air-conditioner carry out oil return control, and during the accumulated running time of air-conditioner T＞6h, then system just enters the oil return running: after master control borad control room inner blower shut down 2 minutes, make indoor fan low velocity wind running 1 minute again, at this moment liquid refrigerant drives the gas-liquid separator of lubricating oil retrieval system in the evaporimeter, get back to compressor by the spill port of gas-liquid separator again, indoor fan returns to original wind speed then;
3., when H 〉=16m, the technical staff judges that according to the installation drop of air-conditioner the air-conditioner needs carry out oil return control and air-conditioner is carried out corresponding oil return control setting, under the pattern of refrigerating operaton, when the microprocessor of air-conditioner judges that according to technical staff's setting system's needs of air-conditioner carry out oil return control, and during the accumulated running time of air-conditioner T＞6h, then system just enters the oil return running: after master control borad control room inner blower shut down 3 minutes, make indoor fan low velocity wind running 2 minutes again, at this moment liquid refrigerant drives the gas-liquid separator of lubricating oil retrieval system in the evaporimeter, get back to compressor by the spill port of gas-liquid separator again, indoor fan returns to original wind speed then.
The method for controlling oil return of air-conditioner of the present invention compared with prior art has following remarkable advantage and beneficial effect:
Air-conditioner system enters oil return when running, after indoor fan being carried out special start-stop control, drives the gas-liquid separator of lubricating oil retrieval system by cold-producing medium liquid in the evaporimeter, and then gets back to compressor from gas-liquid separator.As 8m≤H＜16m, during the accumulated running time T of air-conditioner＞6h, then system just enters the oil return running, after master control borad control indoor set blower fan shut down 2 minutes, make indoor fan low velocity wind running 1 minute again, at this moment the gas-liquid separator of liquid refrigerant drive lubricating oil retrieval system in the evaporimeter has spill port on the gas-liquid separator escape pipe, and lubricating oil is got back to compressor through spill port again; As H 〉=16m, during the accumulated running time T of air-conditioner＞6h, then system just enters the oil return running, after master control borad control indoor set blower fan shut down 3 minutes, low velocity wind running 2 minutes, the at this moment gas-liquid separator of liquid refrigerant drive lubricating oil retrieval system in the evaporimeter, get back to compressor through the spill port of gas-liquid separator again, carrying out oil return control by this kind mode does not need to use oil return curved, has made things convenient for the installation of air-conditioner, has reduced expenses of labour simultaneously yet.
Description of drawings
Fig. 1 is the operation principle structural representation of the method for controlling oil return of air-conditioner of the present invention.
Fig. 2 is the circuit diagram of the method for controlling oil return of air-conditioner of the present invention.
As shown in the figure: 1, compressor, 2, cross valve, 3, condenser, 4, throttling arrangement, 5, evaporimeter, 6, gas-liquid separator, 7, single-chip microcomputer, 8, rp-drive, 9, relay, 10, indoor middling speed wind, 11, indoor low velocity wind.
The specific embodiment
Be described in further detail below in conjunction with the method for controlling oil return of the drawings and specific embodiments air-conditioner of the present invention.
See also shown in Figure 1, the basic principle of air-conditioner refrigeration is: become gas after compressed machine 1 compression of cold-producing medium in the compressor 1 and parts of lubricating oil, the mist of cold-producing medium and lubricating oil is emitted heat formation high pressure liquid refrigerant and oil mixture after entering condenser 3 liquefaction through cross valve 2 again, mixing material becomes low-pressure, liquid refrigerant and oil mixture through throttling arrangement 4, the mixing material indoor evaporator 5 of flowing through, wherein the lubricating oil of cold-producing medium and small part is become gas to enter gas-liquid separator 6 by cross valve 2 by evaporimeter 5 carburation by evaporations, and then gets back to compressor 1.
See also shown in Figure 2, if the installation drop of air-conditioner is H (an installation drop of promptly representing air-conditioner with H), described installation drop H is the setting height(from bottom) of the setting height(from bottom)-indoor set of off-premises station, the setting height(from bottom) of indoor set and off-premises station is to be benchmark with the ground level, is the height of loom base plate apart from ground level; If the accumulated running time of air-conditioner is T (accumulated running time of promptly representing air-conditioner with T), air-conditioner running time T=0 that powers on for the first time then, concrete control operation pattern is:
1., when H＜8m, technical staff's (be generally and install or the attendant) judges not needs oil return control of air-conditioner according to the installation drop of air-conditioner, and the mode by cross-line connects the setting that two cross-lines do not need oil return control between master control borad and hardware, can not need the setting (have dial-up, wire jumper or parameter that setting device is set etc. on the microprocessor of air-conditioner, the technical staff can set the control mode of air-conditioner according to the installation drop situation of air-conditioner) of oil return control by the mode of dial-up or parameter setting yet.After the setting, under the pattern of refrigerating operaton, the microprocessor of air-conditioner does not carry out special oil return operation to air-conditioner system according to technical staff's setting;
2., when 8m≤H＜16m, the technical staff judges that according to the installation drop of air-conditioner the air-conditioner needs carry out oil return control, and the mode by cross-line connects a cross-line and needs oil return control between master control borad and hardware, also can need the setting of oil return control by the mode of dial-up or parameter setting.After the setting, under the pattern of refrigerating operaton, when the microprocessor of air-conditioner judges that according to technical staff's setting system's needs of air-conditioner carry out oil return control, and during the accumulated running time of air-conditioner T＞6h, then system just enters the oil return running: if the user is provided with indoor middling speed wind 10 to air-conditioner, after system enters the oil return running, master control borad single-chip microcomputer 7 is used for that pin of middling speed wind 10 in the control room and just exports low electricity frequently, the low electricity of output is exported high electricity frequently frequently again after rp-drive 8 conversions, the high electricity of input input that relay 9 links to each other with rp-drive 8 frequently, relay 9 coil blackouts, relay 9 output loops are disconnected, middling speed wind 10 in the close chamber is (if the user is provided with indoor high-speed wind or indoor low velocity wind to air-conditioner, with high speed winds in the same manner close chamber or indoor low velocity wind), after lasting 2 minutes of shut-in time, single-chip microcomputer 7 is used for the pin of low velocity wind 11 in the control room and just exports high electricity frequently, high electricity is exported low electricity frequently frequently again after rp-drive 8 conversions, the low electricity of input input that relay 9 links to each other with rp-drive 8 frequently, relay 9 coil electricities, relay 9 output loop conductings, air-conditioner is with regard to the indoor low velocity wind 11 of entry into service, after indoor low velocity wind 11 runnings 1 minute again in the same way control room inner blower (being the blower fan of indoor units) return to original wind speed.Indoor fan shuts down, indoor set does not just carry out heat exchange, when mixing material is flowed through indoor machine evaporation 5, have only the part cold-producing medium to be evaporated into gas, lubricating oil is dissolved in the liquid refrigerant, and under the drive of liquid refrigerant the gas-liquid separator 6 of retrieval system, and then get back to compressor 1 by the spill port on gas-liquid separator 6 escape pipes.
3., when H 〉=16m, the technical staff judges that according to the installation drop of air-conditioner the air-conditioner needs carry out oil return control, and the mode by cross-line do not connect cross-line and needs oil return control between master control borad and hardware, can need the setting of oil return control by the mode of dial-up or parameter setting yet.After the setting, under the pattern of refrigerating operaton, the microprocessor of air-conditioner judges that according to technical staff's setting system's needs of air-conditioner carry out oil return control, and during the accumulated running time of air-conditioner T＞6h, then system just enters the oil return running: if the user is provided with indoor middling speed wind 10 to air-conditioner, after system enters the oil return running, with middling speed wind 10 in the mode close chamber 2. identical with step (if the user is provided with indoor high-speed wind or indoor low velocity wind to air-conditioner, high speed winds or indoor low velocity wind in the close chamber), after lasting 3 minutes of shut-in time, with low velocity wind 11 in the mode opening chamber 2. identical with step, after indoor low velocity wind 11 runnings 2 minutes again in the same way the control room inner blower return to original wind speed.Indoor fan shuts down, indoor set does not just carry out heat exchange, when mixing material is flowed through indoor evaporator 5, have only the part cold-producing medium to be evaporated into gas, lubricating oil is dissolved in the liquid refrigerant, and under the drive of liquid refrigerant the gas-liquid separator 6 of retrieval system, and then get back to compressor 1 by the spill port on gas-liquid separator 6 escape pipes.
In the method for controlling oil return of air-conditioner of the present invention, the technical staff sets the air-conditioner needs according to the installation drop of air-conditioner by the mode of cross-line or dial-up or parameter setting, and to carry out oil return control be known technology, no longer describes in detail.
Claims (1)
1. the method for controlling oil return of an air-conditioner is characterized in that:
If the installation drop of air-conditioner is H, described installation drop H is the setting height(from bottom) of the setting height(from bottom)-indoor set of off-premises station; If the accumulated running time of air-conditioner is T, air-conditioner running time T=0 that powers on for the first time then, concrete control operation pattern is:
1., when H＜8m, the technical staff judges not needs oil return control and the control that air-conditioner carries out not oil return set of air-conditioner according to the installation drop of air-conditioner, under the pattern of refrigerating operaton, the microprocessor of air-conditioner does not carry out special oil return operation to air-conditioner system according to technical staff's setting;
2., when 8m≤H＜16m, the technical staff judges that according to the installation drop of air-conditioner the air-conditioner needs carry out oil return control and air-conditioner is carried out corresponding oil return control setting, under the pattern of refrigerating operaton, when the microprocessor of air-conditioner judges that according to technical staff's setting system's needs of air-conditioner carry out oil return control, and during the accumulated running time of air-conditioner T＞6h, then system just enters the oil return running: after master control borad control room inner blower shut down 2 minutes, make indoor fan low velocity wind running 1 minute again, at this moment liquid refrigerant drives the gas-liquid separator of lubricating oil retrieval system in the evaporimeter, get back to compressor by the spill port of gas-liquid separator again, indoor fan returns to original wind speed then;
3., when H 〉=16m, the technical staff judges that according to the installation drop of air-conditioner the air-conditioner needs carry out oil return control and air-conditioner is carried out corresponding oil return control setting, under the pattern of refrigerating operaton, when the microprocessor of air-conditioner judges that according to technical staff's setting system's needs of air-conditioner carry out oil return control, and during the accumulated running time of air-conditioner T＞6h, then system just enters the oil return running: after master control borad control room inner blower shut down 3 minutes, make indoor fan low velocity wind running 2 minutes again, at this moment liquid refrigerant drives the gas-liquid separator of lubricating oil retrieval system in the evaporimeter, get back to compressor by the spill port of gas-liquid separator again, indoor fan returns to original wind speed then.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910098834XA CN101561208B (en) | 2009-05-15 | 2009-05-15 | Method for controlling oil return of air conditioners |
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| CN200910098834XA CN101561208B (en) | 2009-05-15 | 2009-05-15 | Method for controlling oil return of air conditioners |
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| CN101561208B true CN101561208B (en) | 2010-12-08 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102914086B (en) * | 2012-11-21 | 2015-11-11 | 湖南凌天科技有限公司 | Air-conditioner set forces oil return method |
| CN104344621B (en) * | 2013-08-05 | 2017-02-15 | 广东美的暖通设备有限公司 | Oil returning control method and oil returning control device for refrigerating system |
| CN104913556B (en) * | 2015-05-28 | 2017-06-30 | 广东美的暖通设备有限公司 | Recuperation of heat air-cooled heat pump cold-hot water machine and its method for controlling oil return |
| CN106247686B (en) * | 2016-08-16 | 2019-03-08 | 广东美的暖通设备有限公司 | Method for controlling oil return, oil return control device and the air conditioner of air conditioner |
| US10180270B2 (en) * | 2017-03-17 | 2019-01-15 | Rheem Manufacturing Company | Modular cooling system for high-rise building |
| CN110207416A (en) * | 2019-06-03 | 2019-09-06 | 珠海格力电器股份有限公司 | Outdoor unit, air-conditioning and cleaning method |
| CN110657550B (en) * | 2019-10-21 | 2021-11-16 | 宁波奥克斯电气股份有限公司 | Compressor oil return control method and device and air conditioner |
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| JP2002277077A (en) * | 2001-03-19 | 2002-09-25 | Fujitsu General Ltd | Air conditioner |
| CN2682346Y (en) * | 2003-11-14 | 2005-03-02 | 河南新飞电器有限公司 | Oil return apparatus of compressor |
| EP1686333A2 (en) * | 2005-01-11 | 2006-08-02 | Samsung Electronics Co., Ltd. | Air conditioner |
| CN1888746A (en) * | 2005-06-27 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Air conditioner with engine oil separator and engine oil separator control method |
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2009
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000146369A (en) * | 1998-11-06 | 2000-05-26 | Hitachi Ltd | Air conditioner |
| JP2002277077A (en) * | 2001-03-19 | 2002-09-25 | Fujitsu General Ltd | Air conditioner |
| CN2682346Y (en) * | 2003-11-14 | 2005-03-02 | 河南新飞电器有限公司 | Oil return apparatus of compressor |
| EP1686333A2 (en) * | 2005-01-11 | 2006-08-02 | Samsung Electronics Co., Ltd. | Air conditioner |
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| CN101561208A (en) | 2009-10-21 |
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Inventor after: Zheng Jianjiang Inventor after: Liu Zhisheng Inventor before: Liu Zhisheng |
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Address after: 315191 Zhejiang city of Ningbo province Yinzhou District Jiangshan town Light Road No. 1166 Patentee after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Yinzhou District Jiangshan town Light Road No. 1166 Patentee before: Ningbo AUX Electric Co., Ltd. |
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Effective date of registration: 20191217 Address after: 243100 No. 1166, oaks Avenue, Dangtu Economic Development Zone, Ma'anshan City, Anhui Province Patentee after: Anhui Ox Intelligent Electric Co., Ltd. Address before: 315191 Zhejiang city of Ningbo province Yinzhou District Jiangshan town Light Road No. 1166 Patentee before: NINGBO AUX ELECTRIC CO., LTD. |