CN102297549A - Defrosting method for air conditioner - Google Patents
Defrosting method for air conditioner Download PDFInfo
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- CN102297549A CN102297549A CN2011102724343A CN201110272434A CN102297549A CN 102297549 A CN102297549 A CN 102297549A CN 2011102724343 A CN2011102724343 A CN 2011102724343A CN 201110272434 A CN201110272434 A CN 201110272434A CN 102297549 A CN102297549 A CN 102297549A
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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 at 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 more after a little while, still defrost according to set mode, thereby the heat exchanger ability can not be given full play to, when causing whole air-conditioning system to be moved, heating effect variation, neither energy-conservation not environmental protection again.
Summary of the invention
The present invention overcomes above-mentioned defective, 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 last 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 air-conditioning of control 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 the off-premises station stop valve is set, temperature sensor is set on the indoor set, off-premises station is provided with the input temp sensor, temp, sensor of outdoor unit, off-premises station is provided with 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, the defrosting time accounting is controlled defrosting time jointly, if preceding time the defrosting accounting is little, it is few to judge that outdoor heat converter frost, and can prolong the duration of runs that heats in the defrosting running so next time; If preceding time the defrosting accounting is big, it is many to judge that outdoor heat converter frost, and can shorten the duration of runs that heats in the 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, can more accurate assurance defrost the entry time, thereby makes defrosting mode reach the Based Intelligent Control that can defrost alternately.
The concrete steps of control method of the present invention are such: 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 1 and compare, if Pd greater than f1, then continues to measure; Smaller or equal to f1, record is heating operation time t1 at this moment up to Pd;
E) timing is restarted in timer zero clearing, detects the measured value TE of temp, sensor of outdoor unit, and the f2 of TE value and step 1 is compared, if TE greater than f2, continues measurement, smaller or equal to f2, writes down t2 running time up to TE;
F) timer zero clearing restarts timing;
G) whether the measured value TE of detection temp, sensor of outdoor unit if TE less than setting value B2, then proceed measure, up to TE more than or equal to setting value B2, writes down running time t3 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 are compared, if R, just subtracts the f1 value setting value 1 smaller or equal to A, the f2 value subtracts setting value 2, record; If R is greater than A for the defrosting time accounting, then enter step j;
J) compare detecting defrosting time accounting R and B, if R, then adds the f1 value setting value 1 more than or equal to B, the f2 value adds setting value 2, record; If R is less than B for the defrosting time accounting, then enter step k;
K) value of record 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%, and the B value is set to 7% ~ 8%.
The B2 value is set to 8 ~ 15 degrees centigrade.
The present invention adopts the control that accurately defrosts of the voltage-controlled defrosting control technology of self adaptation, the condition that at every turn enters defrosting all can be adjusted automatically according to the ruuning situation of last time, can more accurate assurance defrost the 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.
1-compressor, 2-cross valve, 3-stop valve, 4-stop valve, 5-high-pressure sensor, 6-electric expansion valve, 7-input temp sensor, 8-temp, sensor of outdoor unit.
The specific embodiment
Embodiment 1
The refrigerating circuit of air-conditioning air-conditioning of the present invention comprises compressor 1, cross valve 2, indoor set, off-premises station, they are connected to form the loop in turn, stop valve 3 is set between indoor set and the off-premises station, 4, temperature sensor is set on the indoor set, off-premises station is provided with input temp sensor 7, temp, sensor of outdoor unit 8, off-premises station is provided with high-pressure sensor 5, compressor 1, cross valve 2, indoor set, off-premises station, temperature sensor all is connected with CPU, this method is simultaneously according to pressure, the defrosting time accounting is controlled defrosting time jointly, if preceding time the defrosting accounting is little, it is few to judge that outdoor heat converter frost, and can prolong the duration of runs that heats in the defrosting running so next time; If preceding time the defrosting accounting is big, it is many to judge that outdoor heat converter frost, and can shorten the duration of runs that heats in the 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, can more accurate assurance defrost the entry time, thereby makes defrosting mode reach the Based Intelligent Control that can defrost alternately.
Control method of the present invention is as follows:
The air-conditioning unit changes over to when heating the state operation, and the cross valve commutation picks up counting, 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 behind t2 running time.In the defrosting, cross valve commutation picks up counting, and changes the coil temperature TE of defrosting temperature sensor recording room external heat exchanger over to, withdraws from defrosting behind TE 〉=12 ℃, and be t3 running time in the defrosting, 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%, then this outdoor heat exchanger frosting of decidable seldom, the defrosting entry condition in next heating operation cycle should improve, and prolongs its heating operation cycle.
The air-conditioning unit changes over to when heating the state operation once more, and the cross valve commutation picks up counting, 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 behind t2 running time.In the defrosting, cross valve commutation picks up counting, and changes the coil temperature TE of defrosting temperature sensor recording room external heat exchanger over to, withdraws from defrosting behind TE 〉=12 ℃, and be t3 running time in the defrosting, 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%, then this outdoor heat exchanger frosting of decidable is a lot, and 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 once more, and the cross valve commutation picks up counting, 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 behind t2 running time.In the defrosting, cross valve commutation picks up counting, and changes the coil temperature TE of defrosting temperature sensor recording room external heat exchanger over to, withdraws from defrosting behind TE 〉=12 ℃, and be t3 running time in the defrosting, 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%, then next heats the defrosting decision condition in cycle and keeps original state.
Embodiment 2:
The difference of present embodiment and embodiment 1 is that the A value of present embodiment is set to 2.5%, and the B value 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 present embodiment and embodiment 1 is that the A value of present embodiment is set to 2%, and the B value 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 (8)
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 the off-premises station stop valve is set, temperature sensor is set on the indoor set, off-premises station is provided with the input temp sensor, temp, sensor of outdoor unit, off-premises station is provided with 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, the defrosting time accounting is controlled defrosting time jointly, if preceding time the defrosting accounting is little, it is few to judge that outdoor heat converter frost, and can prolong the duration of runs that heats in the defrosting running so next time; If preceding time the defrosting accounting is big, it is many to judge that outdoor heat converter frost, and can shorten the duration of runs that heats in the 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, can more accurate assurance defrost the entry time, thereby makes defrosting mode reach the Based Intelligent Control that can defrost alternately.
2. the Defrost method of air-conditioning according to claim 1 is characterized in that, 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) timer zero clearing restarts timing;
4) read the measured value Pd of high-pressure sensor and the f1 value of step 1 and compare, if Pd greater than f1, then continues to measure; Smaller or equal to f1, record is heating operation time t1 at this moment up to Pd;
5) timing is restarted in timer zero clearing, detects the measured value TE of temp, sensor of outdoor unit, and the f2 of TE value and step 1 is compared, if TE greater than f2, continues measurement, smaller or equal to f2, writes down t2 running time up to TE;
6) timer zero clearing restarts timing;
7) whether the measured value TE of detection temp, sensor of outdoor unit if TE less than setting value B2, then proceed measure, up to TE more than or equal to setting value B2, writes down running time t3 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 setting value are compared, if R, just subtracts the f1 value setting value 1 smaller or equal to A, the f2 value subtracts setting value 2, record; If R is greater than A for the defrosting time accounting, then enter step 10;
10) compare detecting defrosting time accounting R and B, if R, then adds the f1 value setting value 1 more than or equal to B, the f2 value adds setting value 2, record; If R is less than B for the defrosting time accounting, then enter step 11;
11) value of record f1, f2 value and step 2 equates, enters next time to heat.
3. control method according to claim 2 is characterized in that, setting value 1 is set to 0.1 ~ 0.3 megapascal (MPa).
4. control method according to claim 2 is characterized in that, setting value 2 is set to 1 ~ 3 degree centigrade.
5. control method according to claim 2 is characterized in that the A value is set to 2% ~ 3%, and the B value is set to 7% ~ 8%.
6. control method according to claim 2 is characterized in that the number range of f1 is set to 2.0 ~ 3.0 megapascal (MPa)s.
7. control method according to claim 2 is characterized in that, the number range of f2 is set to-8 ~-15 degrees centigrade.
8. control method according to claim 2 is characterized in that, the B value is set to 8 ~ 15 degrees centigrade.
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| CN 201110272434 CN102297549B (en) | 2011-09-15 | 2011-09-15 | Defrosting method for air conditioner |
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| CN 201110272434 CN102297549B (en) | 2011-09-15 | 2011-09-15 | Defrosting method for air conditioner |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103363603A (en) * | 2012-03-05 | 2013-10-23 | 汉拿伟世通空调有限公司 | Heat pump system for vehicle and method of controlling the same |
| CN104634032A (en) * | 2015-01-30 | 2015-05-20 | 广东美的制冷设备有限公司 | Defrosting speed adjusting method, defrosting speed adjusting device and air conditioner |
| CN104676991A (en) * | 2013-11-26 | 2015-06-03 | 珠海格力电器股份有限公司 | Air conditioner and defrosting method thereof |
| CN104764263A (en) * | 2014-01-02 | 2015-07-08 | 美的集团股份有限公司 | Defrosting control method and device of heat pump system |
| CN105588223A (en) * | 2015-08-31 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Outdoor unit, defrosting control system and method |
| CN106940065A (en) * | 2016-01-05 | 2017-07-11 | 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-conditioning defrosting control method and device |
| WO2019007376A1 (en) * | 2017-07-05 | 2019-01-10 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| WO2019093249A1 (en) * | 2017-11-07 | 2019-05-16 | ダイキン工業株式会社 | Refrigeration cycle device |
| CN111609665A (en) * | 2020-05-15 | 2020-09-01 | 珠海格力电器股份有限公司 | Defrosting control method and device |
| CN111964213A (en) * | 2020-08-21 | 2020-11-20 | 宁波奥克斯电气股份有限公司 | Defrosting cycle control method and device, electronic equipment and storage medium |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103363603B (en) * | 2012-03-05 | 2016-01-13 | 汉拿伟世通空调有限公司 | For heat pump and the control method thereof of vehicle |
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| CN104676991A (en) * | 2013-11-26 | 2015-06-03 | 珠海格力电器股份有限公司 | Air conditioner and defrosting method thereof |
| CN104676991B (en) * | 2013-11-26 | 2017-03-08 | 珠海格力电器股份有限公司 | Air-conditioner and its Defrost method |
| 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 |
| CN104764263A (en) * | 2014-01-02 | 2015-07-08 | 美的集团股份有限公司 | Defrosting control method and device of heat pump system |
| CN104634032A (en) * | 2015-01-30 | 2015-05-20 | 广东美的制冷设备有限公司 | Defrosting speed adjusting method, defrosting speed adjusting device and air conditioner |
| CN105588223A (en) * | 2015-08-31 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Outdoor unit, defrosting control system and method |
| 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 |
| CN106940065A (en) * | 2016-01-05 | 2017-07-11 | 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 |
| 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-conditioning defrosting control method and device |
| WO2019007376A1 (en) * | 2017-07-05 | 2019-01-10 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| WO2019093249A1 (en) * | 2017-11-07 | 2019-05-16 | ダイキン工業株式会社 | Refrigeration cycle device |
| CN111609665A (en) * | 2020-05-15 | 2020-09-01 | 珠海格力电器股份有限公司 | Defrosting control method and device |
| CN111964213A (en) * | 2020-08-21 | 2020-11-20 | 宁波奥克斯电气股份有限公司 | Defrosting cycle control method and device, electronic equipment and storage medium |
| 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 |
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