CN101793429B - Intelligent defrosting control method of split air conditioner - Google Patents
Intelligent defrosting control method of split air conditioner Download PDFInfo
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Abstract
The invention belongs to the field of control of air conditioners and relates to an intelligent defrosting control method of a split air conditioner. The method specifically comprises the following steps: a) leading an air conditioner system to enter into the heating operation mode; b) leading the system to record the cumulative operation time of a compressor, detecting and recording the temperature T2 of a coil of a heat exchanger of an indoor unit and the indoor temperature T1, and calculating the difference delta T which is equal to T2-T1; c) entering into the step d when the cumulative operation time of the compressor achieves the set time and the compressor is open currently; and d) dividing into the high wind gear operation state, the medium wind gear operation state, the low wind gear operation state, the gentle wind operation state and the fan stop state according to the operation states of an internal fan; the system takes the operation time of the compressor, the temperature T2 of the coil of the heat exchanger of the indoor unit and the indoor temperature T1 as parameters for setting the conditions of entering into the defrosting operation and exiting the defrosting operation against the different wind gear operation states; and the system carries out defrosting if meeting the conditions of entering into the defrosting operation, and the system exits the defrosting operation and returns to the step a) if meeting the conditions of exiting the defrosting operation. The method is characterized by low cost and high efficiency.
Description
Technical field
The invention belongs to air-conditioning control field, particularly a kind of split air conditioner air-conditioner intelligent defrosting control method.
Background technology
The defrost process of general air-conditioner mainly relies on the sensor on the outdoor condenser coil pipe to control or do not have to increase current protector at indoor set under the situation of sensor at off-premises station carries out assist control.But these two kinds of methods have all increased the cost of air-conditioner.
Summary of the invention
The object of the present invention is to provide a kind of split air conditioner air-conditioner intelligent defrosting control method.This method can not have under the condition of temperature sensor on air conditioner chamber's external heat exchanger coil pipe; Need not protect defrost process through the indoor set current protector; But through indoor set heat exchanger coils temperature sensor T2 value and indoor set return air temperature sensor T1 value are carried out Based Intelligent Control; Reaching has frost can in time get into defrosting, frostlessly can in time withdraw from defrost in heating operation, thereby can improve average heating capacity again when avoiding damaging compressor.
The present invention includes following technical characterictic: a kind of split air conditioner air-conditioner intelligent defrosting control method is characterized in that comprising the steps:
A, air-conditioning system get into the heating operation pattern;
B, system log (SYSLOG) compressor Cumulative Elapsed Time detect and interior machine heat exchanger coil temperature T2 of recording room and indoor temperature T1 calculated difference Δ T=T2-T1;
C, reach setting-up time when compressor accumulation operation, and current compressor gets into steps d when opening;
D, be divided into high wind shelves operating condition, apoplexy shelves operating condition, low wind shelves operating condition, gentle breeze shelves operating condition and blower fan according to the running status of inner blower and stop state; System is that parameter is set entering defrost condition and withdrawed from the defrost condition to different wind shelves running statuses with compressor operating time, indoor set heat exchanger coils temperature T 2 and indoor temperature T1; Get into the defrost condition if satisfy, system carries out defrost, withdraws from the defrost condition if satisfy, and system withdraws from defrost, and returns step a.
Said step b is specially: system log (SYSLOG) compressor Cumulative Elapsed Time, after compressor moves 8 minutes continuously, Δ T is sampled and record; But when the conversion of wind shelves occurring, then the Δ T data in 2 minutes are without record; If power down, shutdown, translative mode or evaporimeter high temperature protection occur in the middle of the machine operation, then to compressor Cumulative Elapsed Time and Δ T ' max zero clearing; Said Δ T ' max is the maximum Δ T ' value that collects in the middle of the machine running process; Said Δ T ' is the correction value of Δ T under different wind shelves states, Δ T '=Δ T+5 during high wind shelves, Δ T '=Δ T when Δ T ' during the apoplexy shelves=Δ T+3, low wind shelves.
Setting-up time is >=45 minutes among the said step c.
Getting into the defrost condition in the said steps d is specially:
When high wind shelves operating condition, apoplexy shelves operating condition and low wind shelves operating condition; Get into defrost and need satisfy following condition simultaneously: after collecting Δ T ' maximum Δ T ' max in the middle of (1), the running, satisfy condition Δ T ' max-Δ T '>=4 ℃ of the Δ T ' that collects again; Said Δ T ' is the correction value of Δ T under different wind shelves states, Δ T '=Δ T+5 during high wind shelves, Δ T '=Δ T when Δ T ' during the apoplexy shelves=Δ T+3, low wind shelves; When (2), the compressor Cumulative Elapsed Time is 45～120 minutes; During high wind shelves, Δ T＜TH
DEFROST, during the apoplexy shelves, Δ T＜TM
DEFROST, when hanging down the wind shelves, Δ T＜TL
DEFROSTThe compressor Cumulative Elapsed Time more than 120 minutes the time, during high wind shelves, Δ T＜TH
DEFROST+ 2, during the apoplexy shelves, Δ T＜TM
DEFROST+ 2, when hanging down the wind shelves, Δ T＜TL
DEFROST+ 2; (3), during low wind shelves, T2＜48 ℃; T2 during the apoplexy shelves＜46 ℃; T2＜43 ℃ during high wind shelves; Said TH
DEFROST, TM
DEFROSTAnd TL
DEFROSTRefer to the indoor pipe temperature value that indoor fan is set respectively when high, medium and low wind shelves turn round.
When gentle breeze shelves operating condition and blower fan stopped state, the condition that satisfies step c then directly got into defrost;
Low windscreen operating condition, and power on first, when switching on and shutting down or translative mode, satisfy simultaneously: (1), when the compressor Cumulative Elapsed Time is 45-120 minute; Δ T＜TL
DEFROSTThe compressor Cumulative Elapsed Time more than 120 minutes the time, Δ T＜TL
DEFROST+ 2; (2), T2＜48 ℃.
The condition that withdraws from defrost in the said steps d is specially:
The defrost time arrives, and finishes defrost;
Or getting into defrosting after 3 minutes, every 5s detects a T2 value, if T2 >=2 ℃, the end defrost;
Or getting into defrosting after 2 minutes, every 5s detects a T2 value, and record T2 minimum T2min, if in 4 minutes, T2-T2min >=2 ℃ occur, and T2 >=-13 ℃, then finishes to defrost.
Defrost action and defrost tenth skill are for being specially in the said steps d:
Compress machine-operated DF during defrost and then open second, cross valve is opened DF-5 and is then closed second, and outdoor fan closes immediately, and inner blower is closed at once;
The defrost tenth skill time is DF second; Office is opened, compressed to outdoor fan during this period, cross valve is closed at preceding DF-5 second, opens then; Said DF is meant when heating that air-conditioner gets into during the defrost, from compressor shutdown to getting into the time interval of refrigeration mode to the condenser defrost.
The present invention is through carrying out Based Intelligent Control to indoor set heat exchanger coils temperature sensor T2 value and indoor set return air temperature sensor T1 value; Reaching has frost can in time get into defrosting, frostlessly can in time withdraw from defrost in heating operation, thereby can improve average heating capacity again when avoiding damaging compressor.Owing on air conditioner chamber's external heat exchanger coil pipe, do not have under the condition of temperature sensor, need not protect defrost process through the indoor set current protector, therefore provide cost savings, have the characteristics of low-cost high-efficiency.
Description of drawings
Fig. 1 is intelligent defrosting control step a, b, a c sketch map under the air conditioner heat-production pattern;
Fig. 2 is the flow chart when high wind shelves turn round in the intelligent defrosting control steps d under the air conditioner heat-production pattern;
Fig. 3 is the flow chart when the apoplexy shelves turn round in the intelligent defrosting control steps d under the air conditioner heat-production pattern;
Fig. 4 is the flow chart when low wind shelves running and accumulated running time were less than 120 minutes in the intelligent defrosting control steps d under the air conditioner heat-production pattern;
Fig. 5 is the flow chart when low wind shelves running and accumulated running time were more than or equal to 120 minutes in the intelligent defrosting control steps d under the air conditioner heat-production pattern;
Fig. 6 is that intelligent defrosting is controlled the running of gentle breeze shelves or the flow chart in blower fan stopping time in the steps d under the air conditioner heat-production pattern;
Fig. 7 is defrost and a defrost tenth skill sketch map under the air conditioner heat-production pattern.
The specific embodiment
Below will do detailed description to idiographic flow:
Like accompanying drawing 1, air-conditioning system gets into heating operation pattern, then opening entry compressor Cumulative Elapsed Time.When compressor continuously operation after 8 minutes Δ T (T2-T1) is sampled and writes down (but when the wind shelves occurring and change, then the Δ T data in two minutes need not write down).If power down, shutdown, translative mode or evaporimeter high temperature protection occur in the middle of the machine operation then compressor Cumulative Elapsed Time and Δ T ' max carried out zero clearing handle.
If next compressor Cumulative Elapsed Time >=45 minute, and current compressor opening, then several kinds of situation will get into defrost below occurring, otherwise the normal heating operation of machine.
As shown in Figure 2: (1) current inner blower can get into defrost through following dual mode when high wind shelves turn round: the 1st kind of situation: satisfy 120 minutes＞compressor Cumulative Elapsed Time and Δ T ' max-Δ T '>=4 ℃ and Δ T＜TH
DEFROSTAnd T2＜43 ℃ entering defrost.After getting into defrost, satisfy the defrost time to or defrost time >=3 minute after T2 >=2 ℃ or T2-T2min >=2 ℃ withdraw from defrost, get into the heating operation pattern then again.
The 2nd kind of situation: satisfy 120 minutes≤compressor Cumulative Elapsed Time and Δ T ' max-Δ T '>=4 ℃ and Δ T＜TH
DEFROST+ 2 and T2＜43 ℃ get into defrost.After getting into defrost, satisfy the defrost time to or defrost time >=3 minute after T2 >=2 ℃ or T2-T2min >=2 ℃ withdraw from defrost, get into the heating operation pattern then again.
As shown in Figure 3, (2) current inner blower can get into defrost through following dual mode when the apoplexy shelves turn round: the 3rd kind of situation: satisfy 120 minutes＞compressor Cumulative Elapsed Time and Δ T ' max-Δ T '>=4 ℃ and Δ T＜T
MDEFROSTAnd T2＜46 ℃ entering defrost.After getting into defrost, satisfy the defrost time to or defrost time >=3 minute after T2 >=2 ℃ or T2-T2min >=2 ℃ withdraw from defrost, get into the heating operation pattern then again.
The 4th kind of situation: satisfy 120 minutes≤compressor Cumulative Elapsed Time and Δ T ' max-Δ T '>=4 ℃ and Δ T＜TH
DEFROST+ 2 and T2＜46 ℃ get into defrost.After getting into defrost, satisfy the defrost time to or defrost time >=3 minute after T2 >=2 ℃ or T2-T2min >=2 ℃ withdraw from defrost, get into the heating operation pattern then again.
Like Fig. 4, shown in Figure 5: (3) current inner blower can get into defrost through following four kinds of modes when low wind shelves running: the 5th kind of situation: satisfy 120 minutes＞compressor Cumulative Elapsed Time and Δ T ' max-Δ T '>=4 ℃ and Δ T＜TL
DEFROSTAnd T2＜48 ℃ entering defrost.After getting into defrost, satisfy the defrost time to or defrost time >=3 minute after T2 >=2 ℃ or T2-T2min >=2 ℃ withdraw from defrost, get into the heating operation pattern then again.
The 6th kind of situation: satisfy 120 minutes≤compressor Cumulative Elapsed Time and Δ T ' max-Δ T '>=4 ℃ and Δ T＜TL
DEFROST+ 2 and T2＜48 ℃ get into defrost.After getting into defrost, satisfy the defrost time to or defrost time >=3 minute after T2 >=2 ℃ or T2-T2min >=2 ℃ withdraw from defrost, get into the heating operation pattern then again.
The 7th kind of situation: when powering on first or only need satisfying 120 minutes＞compressor Cumulative Elapsed Time and Δ T＜TL when switching on and shutting down or translative mode
DEFROSTAnd T2＜48 ℃ entering defrost.After getting into defrost, satisfy the defrost time to or defrost time >=3 minute after T2 >=2 ℃ or T2-T2min >=2 ℃ withdraw from defrost, get into the heating operation pattern then again.
The 8th kind of situation: when powering on first or only need satisfying 120 minutes≤compressor Cumulative Elapsed Time and Δ T＜TL when switching on and shutting down or translative mode
DEFROST+ 2 and T2＜48 ℃ get into defrost.After getting into defrost, satisfy the defrost time to or defrost time >=3 minute after T2 >=2 ℃ or T2-T2min >=2 ℃ withdraw from defrost, get into the heating operation pattern then again.
As shown in Figure 6: current inner blower is in running of gentle breeze shelves or blower fan stopping time: the 9th kind of situation: directly get into defrost.After getting into defrost, satisfy the defrost time to or defrost time >=3 minute after T2 >=2 ℃ or T2-T2min >=2 ℃ withdraw from defrost, get into the heating operation pattern then again.
In addition about the defrost time, defrost time set such as following table under above-mentioned 1 to 6 kind of situation:
| Compressor accumulated running time (minute) | The defrost time (minute) | |
| 1 | Runtime＝45 | 10 |
| 2 | 45＜runtime≤60 | DT1 |
| 3 | 60＜runtime≤90 | DT1+1 |
| 4 | 90＜runtime≤120 | DT1+2.5 |
| 5 | 120＜runtime | DT1+4.5 |
The maximum duration that situation 7,8,9 gets into defrost is set at 10 minutes; Said DT1 is meant chronomere, and unit is minute, is used to control the machine defrost time, and this numerical value is confirmed according to concrete type.
Accompanying drawing 7 is depicted as defrost and defrost tenth skill sketch map under the air conditioner heat-production pattern.Air-conditioning system gets into defrost in the heating operation pattern, compressor, outdoor fan, indoor fan are closed immediately, crosses DF after second; Compressor start, cross valve were then closed at compressor start in preceding 5 seconds, after defrost finishes; Compressor cuts out, outdoor fan starts; Cross DF after second, compressor, indoor fan are opened, and cross valve was then opened at compressor start in preceding 5 seconds.So far, air-conditioning system gets into heating operation again.
Claims (4)
1. a split air conditioner air-conditioner intelligent defrosting control method is characterized in that comprising the steps:
A, air-conditioning system get into the heating operation pattern;
B, system log (SYSLOG) compressor Cumulative Elapsed Time detect and interior machine heat exchanger coil temperature T2 of recording room and indoor temperature T1 calculated difference Δ T=T2-T1;
C, reach setting-up time when compressor accumulation operation, and current compressor gets into steps d when opening;
D, be divided into high wind shelves operating condition, apoplexy shelves operating condition, low wind shelves operating condition, gentle breeze shelves operating condition and blower fan according to the running status of inner blower and stop state; System is that parameter is set entering defrost condition and withdrawed from the defrost condition to different wind shelves running statuses with compressor operating time, indoor set heat exchanger coils temperature T 2 and indoor temperature T1; Get into the defrost condition if satisfy, system carries out defrost, withdraws from the defrost condition if satisfy, and system withdraws from defrost, and returns step a;
Setting-up time is >=45 minutes among the said step c;
Getting into the defrost condition in the said steps d is specially:
When high wind shelves operating condition, apoplexy shelves operating condition and low wind shelves operating condition; Get into defrost and need satisfy following condition simultaneously: after collecting Δ T ' maximum Δ T ' max in the middle of (1), the running, satisfy condition Δ T ' max-Δ T '>=4 ℃ of the Δ T ' that collects again; Said Δ T ' is the correction value of Δ T under different wind shelves states, Δ T '=Δ T+5 during high wind shelves, Δ T '=Δ T when Δ T ' during the apoplexy shelves=Δ T+3, low wind shelves; When (2), the compressor Cumulative Elapsed Time is 45～120 minutes; During high wind shelves, Δ T＜TH
DEFROST, during the apoplexy shelves, Δ T＜TM
DEFROST, when hanging down the wind shelves, Δ T＜TL
DEFROSTThe compressor Cumulative Elapsed Time more than 120 minutes the time, during high wind shelves, Δ T＜TH
DEFROST+ 2, during the apoplexy shelves, Δ T＜TM
DEFROST+ 2, when hanging down the wind shelves, Δ T＜TL
DEFROST+ 2; (3), during low wind shelves, T2＜48 ℃; T2 during the apoplexy shelves＜46 ℃; T2＜43 ℃ during high wind shelves; Said TH
DEFROST, TM
DEFROSTAnd TL
DEFROSTRefer to the indoor pipe temperature value that indoor fan is set respectively when high, medium and low wind shelves turn round;
When gentle breeze shelves operating condition and blower fan stopped state, the condition that satisfies step c then directly got into defrost;
Low wind shelves operating condition, and power on first, when switching on and shutting down or translative mode, satisfy simultaneously: (1), when the compressor Cumulative Elapsed Time is 45-120 minute; Δ T＜TL
DEFROSTThe compressor Cumulative Elapsed Time more than 120 minutes the time, Δ T＜TL
DEFROST+ 2; (2), T2＜48 ℃.
2. split air conditioner air-conditioner intelligent defrosting control method according to claim 1, it is characterized in that: said step b is specially: system log (SYSLOG) compressor Cumulative Elapsed Time, after compressor moves 8 minutes continuously, T is sampled and record; But when the conversion of wind shelves occurring, then the T data in 2 minutes are without record; If power down, shutdown, translative mode or evaporimeter high temperature protection occur in the middle of the machine operation, then to compressor Cumulative Elapsed Time and T ' max zero clearing; Said Δ T ' max is the maximum Δ T ' value that collects in the middle of the machine running process; Said Δ T ' is the correction value of Δ T under different wind shelves states, Δ T '=Δ T+5 during high wind shelves, Δ T '=Δ T when Δ T ' during the apoplexy shelves=Δ T+3, low wind shelves.
3. split air conditioner air-conditioner intelligent defrosting control method according to claim 1, it is characterized in that: the condition that withdraws from defrost in the said steps d is specially:
The defrost time arrives, and finishes defrost;
Or getting into defrosting after 3 minutes, every 5s detects a T2 value, if T2 >=2 ℃, the end defrost;
Or getting into defrosting after 2 minutes, every 5s detects a T2 value, and record T2 minimum T2min, if in 4 minutes, T2-T2min >=2 ℃ occur, and T2 >=-13 ℃, then finishes to defrost.
4. split air conditioner air-conditioner intelligent defrosting control method according to claim 1 is characterized in that: defrost action and defrost tenth skill are for being specially in the said steps d:
Compress machine-operated DF during defrost and then open second, cross valve is opened DF-5 and is then closed second, and outdoor fan closes immediately, and inner blower is closed at once;
The defrost tenth skill time is DF second; Office is opened, compressed to outdoor fan during this period, cross valve is closed at preceding DF-5 second, opens then; Said DF is meant when heating that air-conditioner gets into during the defrost, from compressor shutdown to getting into the time interval of refrigeration mode to the condenser defrost.
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| CN1796885A (en) * | 2004-12-24 | 2006-07-05 | 珠海格力电器股份有限公司 | Defroster control method for air-conditionner |
| CN101256045A (en) * | 2007-07-25 | 2008-09-03 | 宁波奥克斯空调有限公司 | Intelligent defrosting method for air onditioner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759239A (en) * | 2012-07-18 | 2012-10-31 | 广东志高空调有限公司 | Defrosting method combining temperature change with current value change for air conditioner and controller thereof |
| CN102759239B (en) * | 2012-07-18 | 2015-02-18 | 广东志高空调有限公司 | Defrosting method combining temperature change with current value change for air conditioner and controller thereof |
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