CN102116549A - Method for defrosting of direct current variable frequency heat pump air conditioner - Google Patents
Method for defrosting of direct current variable frequency heat pump air conditioner Download PDFInfo
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- CN102116549A CN102116549A CN 201110067196 CN201110067196A CN102116549A CN 102116549 A CN102116549 A CN 102116549A CN 201110067196 CN201110067196 CN 201110067196 CN 201110067196 A CN201110067196 A CN 201110067196A CN 102116549 A CN102116549 A CN 102116549A
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Abstract
The invention relates to a method for the defrosting of a direct current variable frequency heat pump air conditioner. The method is characterized in that when the air conditioner runs under heating mode and a defrosting condition is reached, the defrosting process is started, a four-way valve does not change direction at this time, a compressor runs at 160Hz to 180Hz, an outdoor electronic expansion valve is opened fully, an outdoor fan is opened fully, an indoor fan runs at a lower windshield, when a condition of stopping defrosting is reached, the defrosting process is stopped; and the opening degree of the full opening of the electronic expansion valve is greater than 450 pulses. Compared with the prior art, the method has the characteristics of shorter defrosting time, lower energy consumption, smaller fluctuations in indoor temperature, and no impacts on service life of the four-way valve and the compressor.
Description
Technical field:
The present invention relates to air-conditioning control field, specifically be meant a kind of method of DC frequency-changing heat pump air conditioner defrosting.
Background technology:
At present, domestic heat pump air conditioner or conventional central heat pump air conditioner (being meant that generally power is at 6 and the following air-conditioning) Defrost method when heat winter all adopts by the commutation of four-way change-over valve and carries out the hot gas defrosting, indoor heat exchanger is converted into refrigeration from heating, be converted into the method that heats from refrigeration again, when but this Defrost method defrosts, need to interrupt heating a period of time, thermal loss is bigger, thereby make fluctuations in indoor temperature bigger, this also makes client's caterwauling very big, and the cross valve of unit and compressor life-span can shorten.Defrosting time was long when therefore there was defrosting in the method for the DC frequency-changing heat pump air conditioner of prior art defrosting, energy consumption is higher, fluctuations in indoor temperature reaches cross valve more greatly and compressor short problem in service life
Summary of the invention:
The present invention is directed to above problem provides that a kind of defrosting time is short, energy consumption is lower, fluctuations in indoor temperature is less and does not influence cross valve and the method for the DC frequency-changing heat pump air conditioner defrosting in compressor service life.
The present invention overcomes the above problems used technical scheme: the method that a kind of DC frequency-changing heat pump air conditioner defrosting is provided, when air-conditioning moves under heating mode, when reaching the defrosting condition, begin to carry out defrost process, this moment, cross valve did not commutate, compressor is with 160Hz～180Hz running, outdoor electric expansion valve standard-sized sheet, the outdoor fan standard-sized sheet, indoor fan turns round at low windscreen, after reaching the defrosting stop condition, withdraw from defrost process; The aperture of described electric expansion valve standard-sized sheet is greater than 450 pulses.
After adopting above method, compared with prior art, the present invention is because when defrosting, and cross valve does not commutate, compressor is with 160Hz～180Hz running, outdoor electric expansion valve standard-sized sheet, outdoor fan standard-sized sheet, indoor fan turns round at low windscreen, after reaching the defrosting stop condition, withdraws from defrost process; The aperture of described electric expansion valve standard-sized sheet is greater than 450 pulses, and then indoor heat exchanger need not to be converted into refrigeration from heating, and is converted into from refrigeration to heat again, keep current state to get final product, also just need not to interrupt heating, so it is defrosting speed is very fast, more over half than the defrosting time shortening of prior art; Secondly indoor coil keeps higher temperature, and indoor wind pushing temperature reduces also just less, and the room temperature that defrosting causes reduces by original 6 ℃ and is kept to 2 ℃, and is energy-conservation more than 25% during operation; Moreover not action of cross valve, and the compressor operating environment does not change yet.Therefore the present invention has that defrosting time is short, energy consumption is lower, fluctuations in indoor temperature is less and does not influence cross valve and the characteristics in compressor service life.
As improvement, described defrosting condition enters defrost process during for arbitrary condition below continuous 2 minutes of the outdoor coil pipe used temperature of air-conditioning and outdoor environment temperature are satisfied immediately, otherwise after turning round 20 minutes continuously, just can enter defrost process: after 1) powering on first 5～20 minutes, no matter environment temperature how, when Te≤-12 ℃, enter defrost process; 2) if outdoor environment temperature Tamb≤0 ℃ then enters defrost process in the time of Te≤0.8Tamb+a ℃; 3) if outdoor environment temperature Tamb＞0 ℃ then enters defrost process in the time of Te≤0.2Tamb+a ℃; 4) if the outdoor environment temperature sensor fault, then when outdoor coil pipe used temperature T e≤+ enter defrost process during a ℃; 5) if outdoor defrosting temperature sensor fault then enters defrost process immediately when the defrost interval time (heating the time) finishes, be decided to be 2～10 minute in the defrosting time this moment; Described a is the tunable integers value; Tamb is an outdoor environment temperature; Te is the temperature of temperature sensor measurement after the throttling, and then after the above defrosting condition judgment of process under original condition, the number of times of defrosting reduces, and therefore defrosting condition of the present invention is more reasonable, and energy-saving effect is obvious, and energy consumption is lower.
Improve as advancing a pulse, described defrosting stop condition is following arbitrary condition: 1) Te 〉=b ℃ or defrosting time 〉=c minute, then withdraw from defrost process immediately, and described b is the tunable integers value, described c is the tunable integers value; 2) when outdoor coil pipe used temperature sensor fault, be decided to be 2～10 minutes in the defrosting time; After defrosting is carried out 2～10 minutes, withdraw from defrost process immediately, then under above-mentioned defrosting stop condition, can under the prerequisite that reaches defrosting effect effectively, in time stop defrost process in the defrost process, thereby make that energy consumption of the present invention is lower.
Described powering on is 10 minutes.
Be decided to be 5 minutes in the described defrosting time.
The specific embodiment:
Below in conjunction with the specific embodiment, the present invention is done an into pulse describes:
Embodiment 1
The embodiment to the control method of a kind of DC frequency converting air-conditioner electric expansion valve of the present invention Defrost mode below in conjunction with the multi-joint central air conditioner system of above-mentioned DC frequency-changing is elaborated:
When air-conditioning moves under heating mode, when reaching the defrosting condition, begin to carry out defrost process, open the electric heater unit of operation this moment, and cross valve does not commutate, compressor turns round with 180Hz, outdoor electric expansion valve standard-sized sheet, the outdoor fan standard-sized sheet, indoor fan turns round at low windscreen, after reaching the defrosting stop condition, withdraw from defrost process; The aperture of described electric expansion valve standard-sized sheet is greater than 450 pulses (this example is 1000 pulses), and the aperture scope of electric expansion valve is 0 pulse～1000 pulses; Other operation all method of operation with the air-conditioning of prior art is identical; The control of each equipment is the existing conventional control method.
Described defrosting condition enters defrost process during for arbitrary condition below the outdoor coil pipe used temperature of air-conditioning and outdoor environment temperature satisfied in continuous 2 minutes immediately, otherwise just can enter defrost process after continuous the running 20 minutes:
1) powered on first 5 minutes after, no matter environment temperature is how,, enter defrost process when Te≤-12 ℃;
2) if outdoor environment temperature Tamb≤0 ℃ then enters defrost process in the time of Te≤0.8Tamb+a ℃;
3) if outdoor environment temperature Tamb＞0 ℃ then enters defrost process in the time of Te≤0.2Tamb+a ℃;
4) if the outdoor environment temperature sensor fault, then when outdoor coil pipe used temperature T e≤+ enter defrost process during a ℃;
5) if outdoor defrosting temperature sensor fault then enters defrost process immediately when the defrost interval time (being also referred to as the time of heating) finishes, be decided to be 2 minute in the defrosting time this moment;
Described a is the tunable integers value, and default value-10; Tamb is an outdoor environment temperature; Te is the temperature of temperature sensor measurement after the throttling.
Described defrosting stop condition is following arbitrary condition:
1) Te 〉=b ℃ or defrosting time 〉=c minute, then withdraw from defrost process immediately, described b is the tunable integers value, and the b default value is 12, described c is the tunable integers value, and c default value 10;
2) when outdoor coil pipe used temperature sensor fault, be decided to be 2 minutes in the defrosting time; After defrosting is carried out 2 minutes, withdraw from defrost process immediately.
Embodiment 2
When air-conditioning moves under heating mode, when reaching the defrosting condition, begin to carry out defrost process, open the electric heater unit of operation this moment, and cross valve does not commutate, compressor turns round with 170Hz, outdoor electric expansion valve standard-sized sheet, the outdoor fan standard-sized sheet, indoor fan turns round at low windscreen, after reaching the defrosting stop condition, withdraw from defrost process; The aperture of described electric expansion valve standard-sized sheet is greater than 450 pulses (this example is 1200 pulses), and the aperture scope of electric expansion valve is 0 pulse～1200 pulses.
Described defrosting condition enters defrost process during for arbitrary condition below the outdoor coil pipe used temperature of air-conditioning and outdoor environment temperature satisfied in continuous 2 minutes immediately, otherwise just can enter defrost process after continuous the running 20 minutes:
1) powered on first 10 minutes after, no matter environment temperature is how,, enter defrost process when Te≤-12 ℃;
2) if outdoor environment temperature Tamb≤0 ℃ then enters defrost process in the time of Te≤0.8Tamb+a ℃;
3) if outdoor environment temperature Tamb＞0 ℃ then enters defrost process in the time of Te≤0.2Tamb+a ℃;
4) if the outdoor environment temperature sensor fault, then when outdoor coil pipe used temperature T e≤+ enter defrost process during a ℃;
5) if outdoor defrosting temperature sensor fault then enters defrost process immediately when the defrost interval time (being also referred to as the time of heating) finishes, be decided to be 5 minute in the defrosting time this moment;
Described a is the tunable integers value, and default value-10; Tamb is an outdoor environment temperature; Te is the temperature of temperature sensor measurement after the throttling.
Described defrosting stop condition is following arbitrary condition:
1) Te 〉=b ℃ or defrosting time 〉=c minute, then withdraw from defrost process immediately, described b is the tunable integers value, and the b default value is 12, described c is the tunable integers value, and c default value 10;
2) when outdoor coil pipe used temperature sensor fault, be decided to be 5 minutes in the defrosting time; After defrosting is carried out 5 minutes, withdraw from defrost process immediately.
Embodiment 3
When air-conditioning moves under heating mode, when reaching the defrosting condition, begin to carry out defrost process, open the electric heater unit of operation this moment, and cross valve does not commutate, compressor turns round with 160Hz, outdoor electric expansion valve standard-sized sheet, the outdoor fan standard-sized sheet, indoor fan turns round at low windscreen, after reaching the defrosting stop condition, withdraw from defrost process; The aperture of described electric expansion valve standard-sized sheet is greater than 450 pulses (this example is 900 pulses), and the aperture scope of electric expansion valve is 0 pulse～900 pulses.
Described defrosting condition enters defrost process during for arbitrary condition below the outdoor coil pipe used temperature of air-conditioning and outdoor environment temperature satisfied in continuous 2 minutes immediately, otherwise just can enter defrost process after continuous the running 20 minutes:
1) powered on first 20 minutes after, no matter environment temperature is how,, enter defrost process when Te≤-12 ℃;
2) if outdoor environment temperature Tamb≤0 ℃ then enters defrost process in the time of Te≤0.8Tamb+a ℃;
3) if outdoor environment temperature Tamb＞0 ℃ then enters defrost process in the time of Te≤0.2Tamb+a ℃;
4) if the outdoor environment temperature sensor fault, then when outdoor coil pipe used temperature T e≤+ enter defrost process during a ℃;
5) if outdoor defrosting temperature sensor fault then enters defrost process immediately when the defrost interval time (being also referred to as the time of heating) finishes, be decided to be 10 minute in the defrosting time this moment;
Described a is the tunable integers value, and default value-10; Tamb is an outdoor environment temperature; Te is the temperature of temperature sensor measurement after the throttling.
Described defrosting stop condition is following arbitrary condition:
1) Te 〉=b ℃ or defrosting time 〉=c minute, then withdraw from defrost process immediately, described b is the tunable integers value, and the b default value is 12, described c is the tunable integers value, and c default value 10;
2) when outdoor coil pipe used temperature sensor fault, be decided to be 10 minutes in the defrosting time; After defrosting is carried out 10 minutes, withdraw from defrost process immediately.
Above embodiment only is preferred embodiment of the present invention; the present invention is not limited only to above embodiment and also allows other structural change; with 165Hz, 168Hz, 175Hz or 178Hz running or the like, allly in rights to independence claimed range of the present invention, change as: compressor, all belong to protection domain of the present invention.
Claims (5)
1. the method for DC frequency-changing heat pump air conditioner defrosting, it is characterized in that: when air-conditioning moves under heating mode, when reaching the defrosting condition, begin to carry out defrost process, this moment, cross valve did not commutate, compressor is with 160Hz～180Hz running, outdoor electric expansion valve standard-sized sheet, the outdoor fan standard-sized sheet, indoor fan turns round at low windscreen, after reaching the defrosting stop condition, withdraw from defrost process; The aperture of described electric expansion valve standard-sized sheet is greater than 450 pulses.
2. the method for DC frequency-changing heat pump air conditioner defrosting according to claim 1, it is characterized in that: described defrosting condition enters defrost process during for arbitrary condition below the outdoor coil pipe used temperature of air-conditioning and outdoor environment temperature satisfied in continuous 2 minutes immediately, otherwise just can enter defrost process after continuous the running 20 minutes:
1) powered on first 5～20 minutes after, no matter environment temperature is how,, enter defrost process when Te≤-12 ℃;
2) if outdoor environment temperature Tamb≤0 ℃ then enters defrost process in the time of Te≤0.8Tamb+a ℃;
3) if outdoor environment temperature Tamb＞0 ℃ then enters defrost process in the time of Te≤0.2Tamb+a ℃;
4) if the outdoor environment temperature sensor fault, then when outdoor coil pipe used temperature T e≤+ enter defrost process during a ℃;
5) if outdoor defrosting temperature sensor fault then enters defrost process immediately when the defrost interval time finishes, be decided to be 2～10 minute in the defrosting time this moment;
Described a is the tunable integers value; Tamb is an outdoor environment temperature; Te is the temperature of temperature sensor measurement after the throttling.
3. the method for DC frequency-changing heat pump air conditioner defrosting according to claim 2, it is characterized in that: described powering on is 10 minutes.
4. the method for DC frequency-changing heat pump air conditioner defrosting according to claim 1, it is characterized in that: described defrosting stop condition is following arbitrary condition:
1) Te 〉=b ℃ or defrosting time 〉=c minute, then withdraw from defrost process immediately, described b is the tunable integers value, described c is the tunable integers value;
2) when outdoor coil pipe used temperature sensor fault, be decided to be 2～10 minutes in the defrosting time; After defrosting is carried out 2～10 minutes, withdraw from defrost process immediately.
5. according to the method for claim 2 or 4 described DC frequency-changing heat pump air conditioner defrostings, it is characterized in that: be decided to be 5 minutes in the described defrosting time.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997368A (en) * | 2012-12-10 | 2013-03-27 | 宁波奥克斯电气有限公司 | Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors |
| CN103388944A (en) * | 2013-08-02 | 2013-11-13 | 广东美的制冷设备有限公司 | Air-conditioning system and control method thereof |
| CN105091442A (en) * | 2015-08-31 | 2015-11-25 | 宁波奥克斯电气有限公司 | Intelligent defrosting method for multi-split air conditioner |
| CN105972758A (en) * | 2016-05-19 | 2016-09-28 | 合肥美的暖通设备有限公司 | Defrosting control method and device for air conditioner and air conditioner |
| CN106247533A (en) * | 2016-08-08 | 2016-12-21 | 珠海格力电器股份有限公司 | Control device, control method and the air conditioning system of a kind of air conditioning system defrost |
| CN109959120A (en) * | 2019-03-21 | 2019-07-02 | 宁波奥克斯电气股份有限公司 | The Defrost method and air conditioner of air conditioner |
| CN110243051A (en) * | 2019-06-21 | 2019-09-17 | 宁波奥克斯电气股份有限公司 | A kind of control method of low-temperature heating of variable frequency air conditioner, system and air-conditioning |
| CN113137709A (en) * | 2021-04-30 | 2021-07-20 | 青岛海尔空调电子有限公司 | Air conditioner and control method thereof |
| CN114484744A (en) * | 2022-02-18 | 2022-05-13 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting method and multi-connected air conditioning system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997368A (en) * | 2012-12-10 | 2013-03-27 | 宁波奥克斯电气有限公司 | Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors |
| CN102997368B (en) * | 2012-12-10 | 2015-04-08 | 宁波奥克斯电气有限公司 | Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors |
| CN103388944A (en) * | 2013-08-02 | 2013-11-13 | 广东美的制冷设备有限公司 | Air-conditioning system and control method thereof |
| CN105091442A (en) * | 2015-08-31 | 2015-11-25 | 宁波奥克斯电气有限公司 | Intelligent defrosting method for multi-split air conditioner |
| CN105091442B (en) * | 2015-08-31 | 2017-11-07 | 宁波奥克斯电气股份有限公司 | The intelligent defrosting method of multi-connected machine |
| CN105972758A (en) * | 2016-05-19 | 2016-09-28 | 合肥美的暖通设备有限公司 | Defrosting control method and device for air conditioner and air conditioner |
| CN105972758B (en) * | 2016-05-19 | 2019-02-12 | 合肥美的暖通设备有限公司 | Defrosting control method, defrosting control device and the air conditioner of air conditioner |
| CN106247533A (en) * | 2016-08-08 | 2016-12-21 | 珠海格力电器股份有限公司 | Control device, control method and the air conditioning system of a kind of air conditioning system defrost |
| CN109959120A (en) * | 2019-03-21 | 2019-07-02 | 宁波奥克斯电气股份有限公司 | The Defrost method and air conditioner of air conditioner |
| CN110243051A (en) * | 2019-06-21 | 2019-09-17 | 宁波奥克斯电气股份有限公司 | A kind of control method of low-temperature heating of variable frequency air conditioner, system and air-conditioning |
| CN113137709A (en) * | 2021-04-30 | 2021-07-20 | 青岛海尔空调电子有限公司 | Air conditioner and control method thereof |
| CN114484744A (en) * | 2022-02-18 | 2022-05-13 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting method and multi-connected air conditioning system |
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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. |