CN105004000B - Defrosting control method during inverter air conditioner heating operation - Google Patents
Defrosting control method during inverter air conditioner heating operation Download PDFInfo
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- CN105004000B CN105004000B CN201510375448.6A CN201510375448A CN105004000B CN 105004000 B CN105004000 B CN 105004000B CN 201510375448 A CN201510375448 A CN 201510375448A CN 105004000 B CN105004000 B CN 105004000B
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- temperature value
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- defrosting
- heat exchanger
- outdoor heat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/30—Condensation of water from cooled air
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses defrosting control method during a kind of inverter air conditioner heating operation, its step is：When being run 7~12 minutes when heating, the coil temperature value of all outdoor heat exchangers in this time is recorded, selection minimum is used as normal temperature value Te0；Accumulative operation 29~32 minutes, enters defrosting process if two conditions are met simultaneously；Condition 1, the coil temperature value Te of current outdoor heat exchanger is less than 7 DEG C and continues 2 minutes；Condition 2, the coil temperature value Te of current outdoor heat exchanger reduces more than 5 DEG C than normal temperature value Te0；After accumulated running time was more than 35 minutes, defrosting process is entered if two conditions are met simultaneously；Condition 1, the coil temperature value Te of current outdoor heat exchanger is less than 5 DEG C and continues 2 minutes；Condition 2, the coil temperature value Te of current outdoor heat exchanger reduces more than 4 DEG C than normal temperature value Te0.The control method can accurately cut defrosting mode.
Description
Technical field
The present invention relates to convertible frequency air-conditioner field, defrosting controlling party when being especially a kind of inverter air conditioner heating operation
Method.
Background technology
Defrosting process of the inverter air conditioner in heating operations is particularly significant.Especially in the winter time, outdoor temperature is low, high humidity
In the environment of, the coil pipe of outdoor heat exchanger is easy to frosting.If frosting is thicker, it is easy for blocking outdoor heat exchanger and air
Heat exchanger channels, the heat transfer effect of serious reduction outdoor heat exchanger.
And the Defrost technology of prior art is usually that four-way reversing valve commutation is entered into defrosting mode, inverted running refrigeration
Pattern is to defrost.The drawbacks of defrosting control method of prior art has a maximum, is exactly that can not accurately hold defrosting all the time
The cut-in timing point that pattern starts and defrosting mode terminates.Prior art be often set simple and crudely one defrosting it is critical
Temperature, defrosting is begun to when outer machine coil pipe reaches this temperature.But it is higher that above-mentioned critical-temperature is often set, because in cold
Winter, when the outer machine coil temperature that may work as air-conditioning reaches such as -4 DEG C of the critical-temperature, although coil surface knot is one layer thin
Frost, but whole unit remains able to normal heating operation well, the north ground especially in outdoor temperature generally less than 0 DEG C
Area, this phenomenon is more common, if now forced service defrosting mode, may result in that defrosting is excessively frequent, and influence is indoor just
Often heat, reduce indoor temperature, influence Consumer's Experience.But can not otherwise the too low of the critical-temperature setting of defrosting be difficult to
Trigger defrosting mode so that outdoor coil pipe used frost layer is tied thicker and thicker.And exit the setting for exiting temperature value of defrosting there is also same
Sample problem, does not change also to the greatest extent if obtaining too low frost layer, if too high must can extend defrosting time, further reduces room temperature, makes one
Feel cold.
The content of the invention
The technical problem to be solved in the present invention, which is to provide, a kind of accurately can cut or exit the inverter air conditioner of defrosting mode
Defrosting control method during heating operation.
The technical solution of the present invention is to provide defrosting control method during a kind of inverter air conditioner heating operation, its
Comprise the following steps that：
In a heating mode, when frequency-changeable compressor starts timing, when heating mode is continuously run 7~12 minutes
When, the coil temperature value of all outdoor heat exchangers in this time is recorded, and select a work minimum in said temperature value
For normal temperature value Te0；
Since timing frequency-changeable compressor, in this period of time for adding up operation 29~32 minutes, progress is following to be judged,
Enter defrosting process if two conditions are met simultaneously；Condition 1, the coil temperature value Te of current outdoor heat exchanger is less than -7
DEG C and continue 2 minutes；Condition 2, the coil temperature value Te of current outdoor heat exchanger than normal temperature value Te0 reduce 5 DEG C with
On；
Since timing frequency-changeable compressor, after accumulated running time was more than 35 minutes, following judgement is carried out, if simultaneously
Meet two conditions and then enter defrosting process；Condition 1, the coil temperature value Te of current outdoor heat exchanger is less than -5 DEG C and lasting
2 minutes；Condition 2, the coil temperature value Te of current outdoor heat exchanger reduces more than 4 DEG C than normal temperature value Te0；
From bringing into operation frequency-changeable compressor, accumulated running time was more than 29 minutes and accumulated running time is no more than 100
Minute, as long as the coil temperature value Te of outdoor heat exchanger is less than -18 DEG C and continues more than 3 minutes, then into defrosting mode；
From bringing into operation frequency-changeable compressor, after accumulated running time was more than 100 minutes, as long as the coil pipe of outdoor heat exchanger
Temperature value Te is less than -15 DEG C and continues more than 3 minutes, then into defrosting mode；
When running defrosting mode, while the coil temperature value Te of outdoor heat exchanger is detected, as long as meeting following three conditions
In any one, then exit defrosting, recover heating operation：Condition 1, Te >=14 DEG C；Condition 2, Te >=10 DEG C and lasting 80s；
Condition 3, defrosting time were more than 10 minutes.
The principle of the decision method is：In start 7~12 minutes this time ranges of operation, heating for unit and is changed at situation
Thermal effect is more satisfactory, under the situation, and even frosting, frost layer is not also thick, does not interfere with normal heating operation,
Therefore, the coil temperature value of outdoor heat exchanger minimum in this time is selected to go to be compared as standard value Te0, if through
After a period of time, the coil temperature value of outdoor heat exchanger has an obvious decline, then illustrates that frosting thickness is larger, right
Coil heat exchange causes very negative impact, now then judges to enter defrosting mode；Moreover, simulating frosting according to logic analysis
Situation understands that the heating operation time is longer, then frosting probability is bigger, and frosting is thicker, and the influence for exchanging the thermal efficiency is bigger, so,
Time is longer, and frosting may be bigger, more needs defrosting, then judges that the condition for entering defrosting is more sensitive, and the time is shorter, then frosting
May be smaller, then judge that the condition for entering defrosting is harsher；Moreover, once having run after a period of time, the disk of outdoor heat exchanger
Pipe temperature value has been less than a bottom line, such as runs more than after 29 minutes, and Te is -20 DEG C and to continue more than 3 minutes, then is bound to pair
Heat exchange is impacted, and defrosting is needed certainly, therefore be directly entered defrosting mode.Equally, the time is longer, judges to enter the condition of defrosting
It is more sensitive.
Using above method, defrosting control method during inverter air conditioner heating operation of the present invention compared with prior art,
With advantages below：
With it, the time point of penetration for starting defrosting can accurately be found, i.e., too sensitive it will not cause defrosting excessively
Frequently and reduce room temperature also will not it is too late it is blunt cause defrosting influence heat transfer effect too late；Similarly, the time point of defrosting is terminated
Also very rationally, both will not defrosting time it is long cause user cold and also will not defrosting time it is too short and cause defrost not to the utmost.
Embodiment
Defrosting control method during inverter air conditioner heating operation of the present invention, it is comprised the following steps that.
In a heating mode, when frequency-changeable compressor starts timing, when heating mode is continuously run 7~12 minutes
When, the coil temperature value of all outdoor heat exchangers in this time is recorded, and select a work minimum in said temperature value
For normal temperature value Te0.
Once meeting following four situation, then into defrosting mode, frequency-changeable compressor is downconverted to 25Hz or so operations, four-way
Reversal valve is commutated, and outer machine electronic expansion valve opening is adjusted to 200~300 steps, and outer fan parking, the anti-cold wind of inner blower is protected, so
Frequency-changeable compressor raising frequency defrosts to 70Hz or so operation afterwards.
Situation 1：Since timing frequency-changeable compressor, add up operation 29~32 minutes this period of time in, carry out with
It is lower to judge, defrosting process is entered if two conditions are met simultaneously；Condition 1, the coil temperature value of current outdoor heat exchanger
Te is less than -7 DEG C and continues 2 minutes；Condition 2, the coil temperature value Te of current outdoor heat exchanger is reduced than normal temperature value Te0
More than 5 DEG C.Such as Te0 is -3 DEG C and Te is -10 DEG C, reduces 7 DEG C, then meets condition 2, and Te is -10 DEG C and continue for 2
More than minute, then condition 1 is also met, it is necessary to defrost.
Situation 2：Since timing frequency-changeable compressor, after accumulated running time was more than 35 minutes, following judgement is carried out, such as
Fruit meets two conditions and then enters defrosting process simultaneously；Condition 1, the coil temperature value Te of current outdoor heat exchanger is less than -5 DEG C
And continue 2 minutes；Condition 2, the coil temperature value Te of current outdoor heat exchanger reduces more than 4 DEG C than normal temperature value Te0.
Situation 3：From bringing into operation frequency-changeable compressor, accumulated running time was more than 29 minutes and accumulated running time does not surpass
100 minutes are spent, as long as the coil temperature value Te of outdoor heat exchanger is less than -18 DEG C and continues more than 3 minutes, then enters defrosting mould
Formula.
Situation 4：From bringing into operation frequency-changeable compressor, after accumulated running time was more than 100 minutes, as long as outdoor heat exchanger
Coil temperature value Te less than -15 DEG C and continuing more than 3 minutes, then into defrosting mode.
When running defrosting mode, while the coil temperature value Te of outdoor heat exchanger is detected, as long as meeting following three conditions
In any one, then exit defrosting, recover heating operation：Condition 1, Te >=14 DEG C；Condition 2, Te >=10 DEG C and lasting 80s；
Condition 3, defrosting time were more than 10 minutes.
When exiting defrosting mode, outer blower fan is opened, and frequency-changeable compressor mixes down to 25Hz or so operation 30s, four-way reversing valve
Commutation, the aperture that outer machine electric expansion valve is returned to before defrosting, frequency-changeable compressor returns target frequency and normally heated.
Claims (1)
1. defrosting control method during a kind of inverter air conditioner heating operation, it is characterised in that：Its step is as follows：
In a heating mode, when frequency-changeable compressor starts timing, when heating mode continuously runs 7~12 minutes, will
The temperature value record of all coil pipes of air-conditioning unit room external heat exchanger in this time, and select minimum in said temperature value one
It is used as normal temperature value Te0；
Since timing frequency-changeable compressor, in this period of time for adding up operation 29~32 minutes, progress is following to be judged, if
Two conditions are met simultaneously then enters defrosting process；Condition 1, the coil temperature value Te of current outdoor heat exchanger is less than -7 DEG C simultaneously
Continue 2 minutes；Condition 2, the coil temperature value Te of current outdoor heat exchanger reduces more than 5 DEG C than normal temperature value Te0；
Since timing frequency-changeable compressor, after accumulated running time was more than 35 minutes, following judgement is carried out, if met simultaneously
Two conditions then enter defrosting process；Condition 1, the coil temperature value Te of current outdoor heat exchanger is less than -5 DEG C and continues 2 points
Clock；Condition 2, the coil temperature value Te of current outdoor heat exchanger reduces more than 4 DEG C than normal temperature value Te0；
From bringing into operation frequency-changeable compressor, accumulated running time was more than 29 minutes and accumulated running time is no more than 100 minutes,
As long as the coil temperature value Te of outdoor heat exchanger is less than -18 DEG C and continues more than 3 minutes, then into defrosting mode；
From bringing into operation frequency-changeable compressor, after accumulated running time was more than 100 minutes, as long as the coil temperature of outdoor heat exchanger
Value Te is less than -15 DEG C and continues more than 3 minutes, then into defrosting mode；
When running defrosting mode, while the coil temperature value Te of outdoor heat exchanger is detected, as long as meeting in following three conditions
Any one, then exit defrosting, recovers heating operation：Condition 1, Te >=14 DEG C；Condition 2, Te >=10 DEG C and lasting 80s；Condition
3rd, defrosting time was more than 10 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510375448.6A CN105004000B (en) | 2015-06-29 | 2015-06-29 | Defrosting control method during inverter air conditioner heating operation |
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| CN201510375448.6A CN105004000B (en) | 2015-06-29 | 2015-06-29 | Defrosting control method during inverter air conditioner heating operation |
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| CN105004000A CN105004000A (en) | 2015-10-28 |
| CN105004000B true CN105004000B (en) | 2017-11-07 |
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| CN106679117A (en) * | 2017-01-24 | 2017-05-17 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method and device |
| CN107421182B (en) * | 2017-04-11 | 2020-04-24 | 贵州九科新能源有限公司 | Defrosting control device and method for air source heat pump dryer |
| CN107166639B (en) * | 2017-05-10 | 2020-08-04 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method and control device and air conditioner |
| CN106958929A (en) * | 2017-05-17 | 2017-07-18 | 广东美的暖通设备有限公司 | Air-conditioning system and its blower control method |
| CN109140693A (en) * | 2017-06-15 | 2019-01-04 | 奥克斯空调股份有限公司 | A kind of intelligent defrosting method of convertible frequency air-conditioner |
| CN107842970B (en) * | 2017-10-18 | 2019-10-01 | 广东美的暖通设备有限公司 | Air-conditioning system and its defrosting control method and device |
| CN108036463B (en) * | 2017-10-23 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Defrosting method of air conditioner |
| CN110631207B (en) * | 2018-06-25 | 2022-06-14 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN108826732A (en) * | 2018-07-27 | 2018-11-16 | 宁波奥克斯电气股份有限公司 | Air-conditioning system and its control method |
| CN111140993A (en) * | 2018-11-06 | 2020-05-12 | 奥克斯空调股份有限公司 | Air conditioner heating and defrosting method and air conditioner using same |
| CN110470001B (en) * | 2019-07-30 | 2021-10-29 | 青岛海尔空调器有限总公司 | Control method for defrosting of air conditioner without stopping and air conditioner |
| CN110454916B (en) * | 2019-08-19 | 2022-03-25 | 广东美的制冷设备有限公司 | Defrosting method of air conditioner and air conditioner |
| CN110594995B (en) * | 2019-09-10 | 2021-07-06 | 宁波奥克斯电气股份有限公司 | Control method and device for improving low-temperature heating comfort of air conditioner, air conditioner and readable storage medium |
| CN110779164A (en) * | 2019-11-13 | 2020-02-11 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting control method and device, air conditioner and computer readable storage medium |
| CN111023457A (en) * | 2019-12-30 | 2020-04-17 | Tcl空调器(中山)有限公司 | Air conditioner defrosting method, air conditioner and storage medium |
| CN112944597B (en) * | 2021-03-18 | 2022-04-19 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device and air conditioner |
| CN112944598B (en) * | 2021-03-18 | 2022-05-13 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device and air conditioner |
| CN114087717B (en) * | 2021-11-16 | 2022-10-18 | 珠海格力电器股份有限公司 | Air conditioner capable of improving low-temperature heating comfort |
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