CN102518595A - Method for controlling rotating speed of outer fan of multi-split air conditioner - Google Patents
Method for controlling rotating speed of outer fan of multi-split air conditioner Download PDFInfo
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- CN102518595A CN102518595A CN201110416740XA CN201110416740A CN102518595A CN 102518595 A CN102518595 A CN 102518595A CN 201110416740X A CN201110416740X A CN 201110416740XA CN 201110416740 A CN201110416740 A CN 201110416740A CN 102518595 A CN102518595 A CN 102518595A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000004378 air conditioning Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000003507 refrigerant Substances 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 239000006200 vaporizer Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The invention discloses a method for controlling the rotating speed of an outer fan of a multi-split air conditioner. The initial rotating speed after the fan is started is determined according to the outdoor environment temperature; in the refrigerating process, the higher the outdoor environment temperature is, the higher the initial rotating speed of the outer fan is; in the heating process, the higher the outdoor environment temperature is, the lower the initial rotating speed of the outer fan is; in the refrigerating process of the air conditioner, the rotating speed of the outer fan is regulated by detecting the high pressure; a high pressure target value is set according to the outdoor environment temperature; the higher the outdoor environment temperature is, the higher the high pressure target value is; and in the heating process of the air conditioner, the rotating speed of the outer fan is regulated by detection the low pressure. According to the invention, the target pressure range is set according to the outdoor environment temperature, so that the control is more reasonable and the reliability and the energy efficiency ratio of a system are improved.
Description
Technical field
The present invention relates to a kind of how online outer blower fan method for controlling number of revolution.
Background technique
Multi-online air-conditioning system just gets into Chinese market the nineties in last century, rely on its control free, energy-efficient, be convenient to advantage such as installation and maintenance, occupied critical role in central air-conditioner market very soon.The load variations of many on line systems is very big, and main cause is because many interior machines of outer machine system's connection can open 1 to N platform indoor set during actual the use; China and foreign countries' machine ambient temperature alters a great deal throughout the year.The load variations of many on line systems is very big, requires multi-connected unit control system to realize the wide range adjusting, and except frequency-changeable compressor frequency, flow of electronic expansion valve enforcement wide range were regulated, the adjusting of outer machine exchange capability of heat was also very important.The adjusting of how online outer machine exchange capability of heat at present mainly contains following method:
1, through four-way valve switching-over cutoff condenser, thus the heat exchange area of adjusting condenser
2, outer blower fan is provided with many grades of wind speed, regulates outer blower fan rotating speed.
The method of the heat exchange area of adjusting condenser is owing to need to increase a lot of system pipelines and valve class, and system is than complicacy and increase cost, and there be limited evidence currently of is used; The method of regulating outer blower fan rotating speed is very common at present; Main rotating speed through the outer blower fan of outer coiler temperature regulation; Though this method is very simple, realization easily,, there is hysteresis effect in coil temperature; React slow, be difficult to the quick control of the system that realizes through judging the outer blower fan of outer coiler temperature regulation.And outer coiler temperature is difficult to accurately reflect the payload of many on line systems, is difficult to the accurate control of the system that realizes through judging the outer blower fan of outer coiler temperature regulation.
Summary of the invention
How online outer the object of the invention provide a kind of blower fan method for controlling number of revolution of fast and effeciently regulating outer blower fan rotating speed in order to overcome the deficiency that above-mentioned prior art exists, thereby make many on line systems keep efficient operation.
The technological scheme that the present invention adopts is: a kind of how online outer blower fan method for controlling number of revolution; At how online outdoor unit environment temperature sensor is set; Low-pressure sensor is set being provided with on the compressor exhaust pipe on high-pressure sensor and the muffler; Utilize pressure transducer, the outer blower fan rotating speed of outdoor environment temperature control air-conditioning, may further comprise the steps:
S1) whether the detection system operating mode is refrigeration mode, is execution in step S2-S3 then, otherwise execution in step S4-S5;
S2) testing environment temperature T, when T >=Ta, outer blower fan was with rotating speed V1 operation t minute; During T＜Ta, outer blower fan was with rotating speed V2 operation t minute, and V1＞V2;
S3) every s detects high-pressure sensor Pg second, when T>=T0, if Pg>=P1 control outer blower fan rotating speed and rises one grade, if Pg≤P2 controls one grade of outer blower fan rotating speed decline, as if P2＜Pg＜P1, controls outer blower fan rotating speed and remains unchanged; When T＜T0,,,, control outer blower fan rotating speed and remain unchanged as if P4＜P1＜P3 if P1≤P4 controls one grade of outer blower fan rotating speed decline if Pg>=P3 control outer blower fan rotating speed and rises one grade;
S4) testing environment temperature T, when T >=Tb, outer blower fan was with rotating speed V3 operation t minute; During T＜Tb, outer blower fan was with rotating speed V4 operation t minute, and V3＜V4;
S5) every s detects low-pressure sensor Pd second, if Pd>=P5 controls outer blower fan rotating speed and rises one grade, if Pd≤P6 controls outer blower fan rotating speed and descends one grade, if P6＜Pd＜P5 controls outer blower fan rotating speed and remains unchanged.
Described high-pressure sensor is mounted on the pipeline between compressor exhaust pipe and the four-way valve.
The invention has the beneficial effects as follows:
1), through pressure transducer detection system height pressure, control outer blower fan rotating speed, can realize the quick control of system, improved system reliability greatly.
2), through pressure transducer detection system height pressure, control outer blower fan rotating speed, can realize system accurate control, improved systematic energy efficiency ratio greatly.
3), according to outdoor environment temperature outer blower fan initial speed is set, it is more reasonable to control, and has improved system reliability.
4), according to outdoor environment temperature the goal pressure scope is set, it is more reasonable to control, and has improved system reliability and Energy Efficiency Ratio.
Description of drawings
Fig. 1 is of the present invention how online refrigerant system configurations schematic representation.
Embodiment
Below pass through embodiment, and combine accompanying drawing that the present invention is described further.
As shown in Figure 1, of the present invention how onlinely form by an outdoor unit, many interior machines and branch pipe, inside and outside machine connecting tube.Outdoor unit mainly is made up of compressor 1, four-way valve 2, condenser 3, outer blower fan 6, outer organic electronic expansion valve 4, liquid container 5; Low-pressure sensor 12 is set being provided with on the pipeline between compressor exhaust pipe and the four-way valve on high-pressure sensor 11, the compressor return air pipe, outdoor unit also is provided with environment temperature sensor 10.Outer blower fan is many grades of adjustable speed fans.
Interior machine mainly is made up of vaporizer 7, interior organic electronic expansion valve 8, interior machine blower fan 9.
The refrigerant circulation route is following during refrigeration: machine vaporizer 7--branch pipe, inside and outside machine connecting tube-four-way valve 2-compressor 1 in the outer organic electronic expansion valve 4-high-pressure storage tank 5-branch pipe of compressor 1-four-way valve 2-condenser 3-, the inside and outside machine connecting tube-Nei organic electronic expansion valve 8-.
The refrigerant circulation route is following when heating: organic electronic expansion valve 8-branch pipe, the outer organic electronic expansion valve 4-condenser 3-four-way valve 2-compressor 1 of inside and outside machine connecting tube-high-pressure storage tank 5-in compressor 1-four-way valve 2--branch pipe, the inside and outside machine connecting tube-Nei machine vaporizer 7-.
Outer blower fan method for controlling number of revolution, the initial speed behind the fan starting confirms that according to outdoor environment temperature outdoor environment temperature is high more during refrigeration, outer blower fan initial speed is high more; Outdoor environment temperature is high more when heating, and outer blower fan initial speed is low more.Through detecting high-pressure to regulate outer blower fan rotating speed, its high-pressure desired value is to set according to outdoor environment temperature during air conditioner refrigerating, and outdoor environment temperature is high more, and the high-pressure desired value is high more.When air-conditioning heats through detecting low pressure to regulate outer blower fan rotating speed.
Turned round 5 minutes with initial speed behind the system boot; The system of treating moves when basicly stable just detection system high-pressure, low pressure; Regulate outer blower fan rotating speed according to the aims of systems force value, outside system regulates according to target pressure value during the blower fan rotating speed, regulating frequency be adjusting in per 15 seconds once; Each rotating speed raises or reduces one grade, avoids system unsettled reforming phenomena to occur.
Below, be example with the R410A refrigerant, explain that control law of the present invention is following:
One), refrigeration mode
1, be provided with according to outdoor environment temperature during the initial speed of outer blower fan during system start-up, when outdoor environment temperature T >=Ta, outer blower fan was with rotating speed V1 operation t minute; If T＜during Ta, outer blower fan is with rotating speed V2 operation t minute, wherein V1＞V2;
2, system's operation was controlled outer blower fan rotating speed according to high-pressure sensor high-pressure after 5 minutes.
When ambient temperature T >=27 ℃, target high-pressure scope P2=2.6MPa, P1=2.9MPa,
When ambient temperature T＜27 ℃, target high-pressure scope P4=2.4Mpa, P3=2.7Mpa, and by following rule control:
A, when high-pressure Pg＞desired value upper limit, outer blower fan rotating speed rises one grade;
B, when high-pressure Pg＜desired value lower limit, outer blower fan rotating speed descends one grade;
C, when high-pressure Pg in target high-pressure scope, the exogenous wind organizational security is held existing rotating speed.
More than control detected and regulates once in 15 seconds.
Two), heating mode
Be provided with according to outdoor environment temperature during the initial speed of outer blower fan during system start-up, when outdoor environment temperature T >=Tb, outer blower fan was with rotating speed V3 operation t minute; When T＜Tb, outer blower fan was with rotating speed V4 operation t minute, and V3＜V4.
System's operation detected the outer blower fan rotating speed of low pressure control according to low-pressure sensor after 5 minutes.
Target low pressure scope P6=0.7Mpa, P5=0.9MPa.
A, when low pressure Pd＞desired value upper limit, outer blower fan rotating speed descends one grade;
B, when low pressure Pd＜desired value lower limit, outer blower fan rotating speed rises one grade;
C, as low pressure (0.7-0.9MPa) in the goal pressure scope, the exogenous wind organizational security is held existing rotating speed.
Claims (2)
1. online outer blower fan method for controlling number of revolution more than a kind; At how online outdoor unit environment temperature sensor is set; Low-pressure sensor is set being provided with on the compressor exhaust pipe on high-pressure sensor and the muffler; Utilize pressure transducer, the outer blower fan rotating speed of outdoor environment temperature control air-conditioning, it is characterized in that may further comprise the steps:
S1) whether the detection system operating mode is refrigeration mode, is execution in step S2-S3 then, otherwise execution in step S4-S5;
S2) testing environment temperature T, when T >=Ta, outer blower fan was with rotating speed V1 operation t minute; During T＜Ta, outer blower fan was with rotating speed V2 operation t minute, and V1＞V2;
S3) every s detects high-pressure sensor Pg second, when T>=T0, if Pg>=P1 control outer blower fan rotating speed and rises one grade, if Pg≤P2 controls one grade of outer blower fan rotating speed decline, as if P2＜Pg＜P1, controls outer blower fan rotating speed and remains unchanged; When T＜T0,,,, control outer blower fan rotating speed and remain unchanged as if P4＜P1＜P3 if P1≤P4 controls one grade of outer blower fan rotating speed decline if Pg>=P3 control outer blower fan rotating speed and rises one grade;
S4) testing environment temperature T, when T >=Tb, outer blower fan was with rotating speed V3 operation t minute; During T＜Tb, outer blower fan was with rotating speed V4 operation t minute, and V3＜V4;
S5) every s detects low-pressure sensor Pd second, if Pd>=P5 controls outer blower fan rotating speed and rises one grade, if Pd≤P6 controls outer blower fan rotating speed and descends one grade, if P6＜Pd＜P5 controls outer blower fan rotating speed and remains unchanged.
2. according to claim 1 how online outer blower fan method for controlling number of revolution is characterized in that: described high-pressure sensor is mounted on the pipeline between compressor exhaust pipe and the four-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110416740XA CN102518595A (en) | 2011-12-13 | 2011-12-13 | Method for controlling rotating speed of outer fan of multi-split air conditioner |
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| CN201110416740XA CN102518595A (en) | 2011-12-13 | 2011-12-13 | Method for controlling rotating speed of outer fan of multi-split air conditioner |
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| CN102518595A true CN102518595A (en) | 2012-06-27 |
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| CN103216908A (en) * | 2013-04-01 | 2013-07-24 | 宁波奥克斯电气有限公司 | Control method for outdoor fan in refrigeration of variable frequency multi-split air-conditioning unit |
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| CN103388856A (en) * | 2013-07-18 | 2013-11-13 | 广东美的暖通设备有限公司 | Multi-split air conditioner system and quick-starting heat generation method |
| CN103759345A (en) * | 2014-02-21 | 2014-04-30 | 广东志高暖通设备股份有限公司 | Draught fan control method |
| CN103982990A (en) * | 2014-06-04 | 2014-08-13 | 深圳麦克维尔空调有限公司 | Method for controlling draught fan in air conditioner outdoor unit and air conditioning system |
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| CN110686373A (en) * | 2019-08-27 | 2020-01-14 | 珠海格力电器股份有限公司 | Control method of outdoor unit fan and air conditioner |
| CN110686373B (en) * | 2019-08-27 | 2021-02-12 | 珠海格力电器股份有限公司 | Control method of outdoor unit fan and air conditioner |
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| CN113063215A (en) * | 2020-01-02 | 2021-07-02 | 青岛海尔空调电子有限公司 | Rotating speed control method of air conditioner external fan |
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| CN111623420A (en) * | 2020-04-26 | 2020-09-04 | 海信（山东）空调有限公司 | Air conditioner |
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| CN112710068A (en) * | 2020-12-29 | 2021-04-27 | 四川长虹空调有限公司 | Method and device for controlling rotating speed of outdoor motor during air conditioner refrigeration and storage medium |
| CN115435471A (en) * | 2022-09-16 | 2022-12-06 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioner control method and system and air conditioner |
| CN115435471B (en) * | 2022-09-16 | 2024-06-28 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioner control method, control system and air conditioner |
| CN116007159A (en) * | 2022-12-12 | 2023-04-25 | 珠海格力电器股份有限公司 | Low-pressure fixed-frequency air conditioner control method and device and air conditioner |
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Application publication date: 20120627 |