CN102297549B - Defrosting method for air conditioner - Google Patents
Defrosting method for air conditioner Download PDFInfo
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- CN102297549B CN102297549B CN 201110272434 CN201110272434A CN102297549B CN 102297549 B CN102297549 B CN 102297549B CN 201110272434 CN201110272434 CN 201110272434 CN 201110272434 A CN201110272434 A CN 201110272434A CN 102297549 B CN102297549 B CN 102297549B
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Abstract
The invention relates to an indoor unit of an air conditioner, in particular to an indoor unit heat exchange structure, and the indoor unit provided with the heat exchange structure. The invention provides the indoor unit heat exchange structure provided with a regenerative branch circuit, and the indoor unit provided with the heat exchange structure. The indoor unit heat exchange structure comprises a heat exchanger provided with a refrigerant side and a water path side; the refrigerant side and the water path side exchange heat in the heat exchanger; the refrigerant side comprises a filter, an electronic expansion valve, a liquid side stop valve and a gas side stop valve which are connected in turn to form a loop; a refrigerating device is arranged between the liquid side stop valve and the gas side stop valve; and the refrigerant side is arranged in the regenerative branch circuit between the gas side and the liquid side. The indoor unit provided with the novel heat exchange structure can increase the supercooling degree of the refrigerant before the electronic expansion valve during refrigeration, can effectively increase the height difference of the indoor unit and an outdoor unit and prolong the effective length of piping, can recover the loss of refrigeration capacity caused by non-uniform refrigerant distribution during refrigeration operation, and improves the refrigerating capacity of a system; and because the refrigerant flowing out of the indoor unit is subjected to regenerative circulation, the superheat degree of the refrigerant flowing out of the indoor unit is increased, a compressor can be effectively prevented from breaking down, and the system reliability is enhanced.
Description
Technical field
The present invention relates to a kind of air-conditioning system, specifically, relate to a kind of Defrost method of air-conditioning.
Background technology
The defrosting control method of most of air-conditionings is only investigated for time, temperature and other conditions, enters defrosting after satisfying these three conditions.Condition and parameter that can this defrosting control method judgement enter defrosting are fixed, and the shortcoming of heating operation time can not be rationally regulated in existence.Defrosting control method is generally set according to maximum defrosting amount, when frosting is less, still defrosts according to set mode, thereby the heat exchanger ability can not be given full play to, when causing whole air-conditioning system operation, heating effect variation, neither energy-conservation not environmental protection again.
Summary of the invention
The present invention overcomes defects, provide a kind of on the basis of condition in the past, introduce pressure at expulsion and these two state parameters of defrosting accounting as condition, heat cycle defrosting time accounting by calculating upper one, pressure at expulsion, defrosting temperature parameter are revised and heated the defrosting entry condition in cycle as next, comprehensively to the defrost Defrost method of the air-conditioning controlled of air-conditioning.
the technical scheme of the Defrost method of air-conditioning of the present invention is such: the refrigerating circuit of air-conditioning comprises compressor, cross valve, indoor set, off-premises station, they are connected to form the loop in turn, between indoor set and off-premises station, stop valve is set, set temperature sensor on indoor set, off-premises station arranges the input temp sensor, temp, sensor of outdoor unit, off-premises station arranges the high-pressure sensor, compressor, cross valve, indoor set, off-premises station, temperature sensor all is connected with CPU, this method is simultaneously according to pressure, defrosting time accounting co-controlling defrosting time, if front time the defrosting accounting is little, can judge that outdoor heat converter frost few, extend the duration of runs that heats in defrosting running so next time, if front time the defrosting accounting is large, it is many that the judgement outdoor heat converter frost, and shorten the duration of runs that heats in defrosting running so next time, the condition that at every turn enters defrosting all can be adjusted automatically according to the ruuning situation of last time, more accurately holds the defrosting entry time, thereby makes defrosting mode reach the Based Intelligent Control of mutual defrosting, and it comprises the following steps:
A) the air-conditioning unit begins to heat;
B) at first CPU reads the measured value f1 of off-premises station high-pressure sensor and the measured value f2 of temp, sensor of outdoor unit;
C) timer zero clearing restarts timing;
D) read the measured value Pd of high-pressure sensor, and the f1 value of step b compares, if Pd greater than f1, continues to measure; Until Pd less than or equal to f1, records heating operation time t1 this moment;
E) timing is restarted in timer zero clearing, detects the measured value TE of temp, sensor of outdoor unit, the f2 of TE value and step b is compared, if TE greater than f2, the continuation measurement is until TE less than or equal to f2, records t2 running time;
F) timer zero clearing restarts timing;
Whether the measured value TE that g) detects temp, sensor of outdoor unit is more than or equal to setting value B2, if TE less than setting value B2, proceeds to measure, until TE records t3 running time more than or equal to setting value B2;
H) calculate defrosting time accounting R, R=t3/(t1+ t2+ t3);
I) defrosting time accounting R and setting value A are compared, if R less than or equal to A, just reduces definite value 1 with the f1 value, the f2 value reduces definite value 2, record; If R is greater than A for the defrosting time accounting, enter step j;
J) compare detecting defrosting time accounting R and settings B, value adds setting value 2, record if R more than or equal to B, adds the f1 value setting value 1, f2; If R is less than B for the defrosting time accounting, enter step k;
K) value that records f1, f2 value and step 2 equates, enters next time to heat.
Setting value 1 is set to 0.1 ~ 0.3 megapascal (MPa).
Setting value 2 is set to 1 ~ 3 degree centigrade.
The number range of f1 is set to 2.0 ~ 3.0 megapascal (MPa)s.
The number range of f2 is set to-8 ~-15 degrees centigrade.
The A value is set to 2% ~ 3%, B value and is set to 7% ~ 8%.
The B2 value is set to 8 ~ 15 degrees centigrade.
The present invention adopts the voltage-controlled defrosting control technology of self adaptation to carry out accurately defrosting and controls, the condition that at every turn enters defrosting all can be adjusted automatically according to the ruuning situation of last time, can more accurately hold the defrosting entry time, thereby make defrosting mode reach the Based Intelligent Control that can defrost alternately.
Description of drawings
Fig. 1 is the structural representation of the refrigerating circuit of air-conditioning of the present invention;
Fig. 2 is the step block diagram of the Defrost method of air-conditioning of the present invention.
The specific embodiment
Embodiment 1
Control method of the present invention is as follows:
The air-conditioning unit changes over to when heating the state operation, and cross valve commutation beginning timing is by the high-pressure of high-pressure sensor record system; When high-pressure Pd≤f1 (Ti) MPa, system running time be t1, can change the coil temperature TE of defrosting temperature sensor recording room external heat exchanger over to, when TE≤f2 (Ta) ℃, enter defrosting after t2 running time.In defrosting, the cross valve commutation begins timing, changes the coil temperature TE of defrosting temperature sensor recording room external heat exchanger over to, and when TE 〉=12 ℃ backed off after random defrosting, in defrosting, be t3 running time, changes next over to and heat the cycle.Defrosting time accounts for a complete ratio R that heats cycle time=t3/(t1+t2+t3).R≤3% can be judged this outdoor heat exchanger frosting seldom, and the defrosting entry condition in next heating operation cycle should improve, and extends its heating operation cycle.
The air-conditioning unit changes over to when heating the state operation again, and cross valve commutation beginning timing is by the high-pressure of high-pressure sensor record system; When high-pressure Pd≤f1 (Ti)-0.1MPa, system running time be t1, can change the coil temperature TE of defrosting temperature sensor recording room external heat exchanger over to, when TE≤f2 (Ta)-1 ℃, enter defrosting after t2 running time.In defrosting, the cross valve commutation begins timing, changes the coil temperature TE of defrosting temperature sensor recording room external heat exchanger over to, and when TE 〉=12 ℃ backed off after random defrosting, in defrosting, be t3 running time, changes next over to and heat the cycle.Defrosting time accounts for a complete ratio R that heats cycle time=t3(t1+t2+t3).When R 〉=8%, can judge that this outdoor heat exchanger frosting is a lot, the defrosting entry condition in next heating operation cycle should reduce, and shortens its heating operation cycle.
The air-conditioning unit changes over to when heating the state operation again, and cross valve commutation beginning timing is by the high-pressure of high-pressure sensor record system; When high-pressure Pd≤f1 (Ti)+0.1, system running time be t1, can change the coil temperature TE of defrosting temperature sensor recording room external heat exchanger over to, when TE≤f2 (Ta)+1 ℃, enter defrosting after t2 running time.In defrosting, the cross valve commutation begins timing, changes the coil temperature TE of defrosting temperature sensor recording room external heat exchanger over to, and when TE 〉=12 ℃ backed off after random defrosting, in defrosting, be t3 running time, changes next over to and heat the cycle.Defrosting time accounts for a complete ratio R that heats cycle time=t3/(t1+t2+t3).When 3%＜R＜8%, next heats the defrosting decision condition in cycle and keeps original state.
Embodiment 2:
The difference of the present embodiment and embodiment 1 is, the A value of the present embodiment is set to 2.5%, B value and is set to 7.5%, and setting value 1 is set to 0.2 megapascal (MPa), and setting value 2 is set to 2 degrees centigrade, and B2 is set to 10 degrees centigrade.
Embodiment 3:
The difference of the present embodiment and embodiment 1 is, the A value of the present embodiment is set to 2%, B value and is set to 7%, and setting value 1 is set to 0.3 megapascal (MPa), and setting value 2 is set to 3 degrees centigrade, and B2 is set to 8 degrees centigrade.
Claims (7)
1. the Defrost method of an air-conditioning, the refrigerating circuit of air-conditioning comprises compressor, cross valve, indoor set, off-premises station, they are connected to form the loop in turn, between indoor set and off-premises station, stop valve is set, set temperature sensor on indoor set, off-premises station arranges the input temp sensor, temp, sensor of outdoor unit, off-premises station arranges the high-pressure sensor, compressor, cross valve, indoor set, off-premises station, temperature sensor all is connected with CPU, it is characterized in that, this method is simultaneously according to pressure, defrosting time accounting co-controlling defrosting time, if front time the defrosting accounting is little, can judge that outdoor heat converter frost few, extend the duration of runs that heats in defrosting running so next time, if front time the defrosting accounting is large, it is many that the judgement outdoor heat converter frost, and shorten the duration of runs that heats in defrosting running so next time, the condition that at every turn enters defrosting all can be adjusted automatically according to the ruuning situation of last time, more accurately holds the defrosting entry time, thereby makes defrosting mode reach the Based Intelligent Control of mutual defrosting, and it comprises the following steps:
1), the air-conditioning unit begins to heat;
2), at first CPU reads the measured value f1 of off-premises station high-pressure sensor, and the measured value f2 of temp, sensor of outdoor unit;
3), the timer zero clearing, restart timing;
4), read the measured value Pd of high-pressure sensor, and the f1 value of step 2 compares, if Pd greater than f1, continues to measure; Until Pd less than or equal to f1, records heating operation time t1 this moment;
5), the timer zero clearing, restart timing, detect the measured value TE of temp, sensor of outdoor unit, the f2 of TE value and step 2 is compared, if TE greater than f2, the continuation measurement is until TE less than or equal to f2, records t2 running time;
6), the timer zero clearing, restart timing;
Whether the measured value TE that 7), detects temp, sensor of outdoor unit is more than or equal to setting value B2, if TE less than setting value B2, proceeds to measure, until TE records t3 running time more than or equal to setting value B2;
8), calculate defrosting time accounting R, R=t3/(t1+ t2+ t3);
9), defrosting time accounting R and the setting value A compare, if R less than or equal to A, just reduces definite value 1 with the f1 value, the f2 value reduces definite value 2, record; If R is greater than A for the defrosting time accounting, enter step 10;
10), compare detecting defrosting time accounting R and settings B, add and set value 2, record if R more than or equal to B, adds f1 value setting value 1, f2 value; If R is less than B for the defrosting time accounting, enter step 11;
11), the value that records f1, f2 value and step 2 equates, enter next time to heat.
2. the Defrost method of air-conditioning according to claim 1, is characterized in that, setting value 1 is set to 0.1 ~ 0.3 megapascal (MPa).
3. the Defrost method of air-conditioning according to claim 1, is characterized in that, setting value 2 is set to 1 ~ 3 degree centigrade.
4. the Defrost method of air-conditioning according to claim 1, is characterized in that, the A value is set to 2% ~ 3%, B value and is set to 7% ~ 8%.
5. the Defrost method of air-conditioning according to claim 1, is characterized in that, the number range of f1 is set to 2.0 ~ 3.0 megapascal (MPa)s.
6. the Defrost method of air-conditioning according to claim 1, is characterized in that, the number range of f2 is set to-15 ~-8 degrees centigrade.
7. the Defrost method of air-conditioning according to claim 1, is characterized in that, the B2 value is set to 8 ~ 15 degrees centigrade.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3708929A4 (en) * | 2017-11-07 | 2020-12-23 | Daikin Industries, Ltd. | Refrigeration cycle device |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130227973A1 (en) * | 2012-03-05 | 2013-09-05 | Halla Climate Control Corporation | Heat pump system for vehicle and method of controlling the same |
| CN104676991B (en) * | 2013-11-26 | 2017-03-08 | 珠海格力电器股份有限公司 | Air conditioner and defrosting method thereof |
| CN104764263B (en) * | 2014-01-02 | 2017-09-26 | 美的集团股份有限公司 | The defrosting control method and device of heat pump |
| CN104634032B (en) * | 2015-01-30 | 2017-02-22 | 广东美的制冷设备有限公司 | Defrosting speed adjusting method, defrosting speed adjusting device and air conditioner |
| CN105588223B (en) * | 2015-08-31 | 2018-05-18 | 青岛海信日立空调系统有限公司 | A kind of outdoor unit, defrosting control system and method |
| CN106940065B (en) * | 2016-01-05 | 2019-10-22 | 青岛海尔空调电子有限公司 | The detection method and air-conditioning of temperature in space during air-conditioner defrosting |
| CN107339772A (en) * | 2017-06-13 | 2017-11-10 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device |
| CN107449105B (en) * | 2017-07-05 | 2019-07-02 | 青岛海尔空调器有限总公司 | A kind of control method of air-conditioner defrosting |
| CN111609665B (en) * | 2020-05-15 | 2021-12-07 | 珠海格力电器股份有限公司 | Defrosting control method and device |
| CN111964213B (en) * | 2020-08-21 | 2022-03-01 | 宁波奥克斯电气股份有限公司 | Defrosting cycle control method and device, electronic equipment and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5493867A (en) * | 1992-11-18 | 1996-02-27 | Whirlpool Corporation | Fuzzy logic adaptive defrost control |
| JP3609286B2 (en) * | 1999-05-25 | 2005-01-12 | シャープ株式会社 | Air conditioning equipment |
| US6334321B1 (en) * | 2000-03-15 | 2002-01-01 | Carrier Corporation | Method and system for defrost control on reversible heat pumps |
| JP2008224189A (en) * | 2007-03-15 | 2008-09-25 | Aisin Seiki Co Ltd | Refrigerating cycle device |
| CN101392977B (en) * | 2008-10-10 | 2010-09-22 | 海信科龙电器股份有限公司 | Defrosting control method of non-frost refrigerator control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3708929A4 (en) * | 2017-11-07 | 2020-12-23 | Daikin Industries, Ltd. | Refrigeration cycle device |
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