CN104236005A - Defrost control method for air conditioners - Google Patents
Defrost control method for air conditioners Download PDFInfo
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- CN104236005A CN104236005A CN201310245275.7A CN201310245275A CN104236005A CN 104236005 A CN104236005 A CN 104236005A CN 201310245275 A CN201310245275 A CN 201310245275A CN 104236005 A CN104236005 A CN 104236005A
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Abstract
The invention discloses a defrost control method for air conditioners. The defrost control method includes S1, detecting running time M of compressors in heating modes; S2, detecting indoor temperatures T1 and pipe temperatures T2 of indoor heat exchangers to obtain difference values DeltaT if the running time M is longer than first preset time M1; S3, comparing the difference values DeltaT with one another to obtain the maximum value DeltaT<MAX> of the difference values, judging whether values DeltaH are larger than first preset values TS1 or not, and comparing the difference values DeltaT with second preset values TS2; S4, enabling the air conditioners to enter defrost stages when the values DeltaH are larger than or equal to the first preset values TS1, the difference values DeltaT are smaller than the second preset values TS2 and the running time M is longer than or equal to time M2; S5, completing defrost when defrost time is up. The difference values DeltaT meet an equation of DeltaT=T2-T1. The values DeltaH meet an equation of DeltaH=DeltaT<MAX>-DeltaT. The defrost control method for the air conditioners in an embodiment of the invention has the advantages that frostless defrost states of the air conditioners can be prevented, and heating effects of the air conditioners can be guaranteed.
Description
Technical field
The present invention relates to household appliance technical field, especially relate to a kind of defrosting control method of air-conditioner.
Background technology
Existing intelligent defrosting method, the setting of defrost time is formulated with the situation of worst industry control, and the defrost time is longer, and general frosting situation does not need the time so grown to defrost, thus causes waste, affects heating operation.Or as long as and there is the gentle breeze blowing-out machine in anti-cold wind in defrost mode in the past, as long as the time one is to entering defrosting, but generally there will not be frosting state under low temperature industry control, easily occur frostless defrosting phenomenon.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.For this reason, one object of the present invention is to propose a kind ofly to avoid occurring frostless defrosting phenomenon and the defrosting control method that can improve the air-conditioner of heating capacity.
According to the defrosting control method of the air-conditioner of the embodiment of the present invention, comprise the steps: S1: control described air-conditioner and enter heating mode, detect M running time of the compressor of described air-conditioner; S2: when detecting that M running time of described compressor is greater than the first scheduled time M1, detects the pipe temperature T2 of the indoor heat exchanger of indoor temperature T1 and described air-conditioner and compares to obtain difference △ T=T2-T1; S3: the maximum △ T obtaining difference is compared to the difference △ T detected
mAX, and judge △ T
mAXand the difference △ H=△ T between the difference △ T detected subsequently
mAXwhether-△ T is greater than the first predetermined value TS1, is compared by difference △ T and the second predetermined value TS2 simultaneously, and the difference △ T wherein detected subsequently is less than the maximum △ T of difference
mAX; S4: when difference △ H is more than or equal to the first predetermined value TS1 and difference △ T is less than the second predetermined value TS2, when M running time of described compressor is more than or equal to the second scheduled time M2 simultaneously, control described air-conditioner and enter defrost phase, wherein the second scheduled time M2 is greater than the first scheduled time M1; S5: in described defrost phase, when described air-conditioner has run defrost time DDT, defrost terminates, and gets back to step S1.
According to the defrosting control method of the air-conditioner of the embodiment of the present invention, by detecting the pipe temperature T2 of the indoor heat exchanger of indoor temperature T1 and air-conditioner, and by comparing the maximum △ T obtaining difference
mAX, now by maximum △ T
mAXdifference △ H between the difference △ T detected subsequently and the first predetermined value TS1 compares, difference △ T and the second predetermined value TS2 is compared simultaneously, when to meet difference △ H is more than or equal to the first predetermined value TS1, difference △ T is less than the second predetermined value TS2 and compressor M running time and be more than or equal to the second scheduled time M2 simultaneously, control air-conditioner and enter defrost phase, thus can avoid occurring frostless defrost state, ensure the heating effect of air-conditioner.
In addition, according to the defrosting control method of air-conditioner of the present invention, also there is following additional technical feature:
According to some embodiments of the present invention, the described difference △ H detected when entering defrost phase according to described air-conditioner and the situation of the first predetermined value TS1 judge the numerical value of defrost time DDT, now defrost time DDT is DT minute: when △ H >=TS1 being detected, and described DT minute is DT1 minute; When △ H >=TS1+2 DEG C being detected, described DT minute is DT1+1 minute; When △ H >=TS1+4 DEG C being detected, described DT minute is DT1+2 minute; When △ H >=TS1+6 DEG C being detected, described DT minute is DT1+3 minute; When △ H >=TS1+8 DEG C being detected, described DT minute is DT1+4 minute; When △ H >=TS1+10 DEG C being detected, described DT minute is DT1+5 minute.
Further, the defrosting control method of described air-conditioner adjusts defrost time DDT according to M running time of compressor further: when described air-conditioner enters defrost phase, described compressor running time, M was the second scheduled time M2 time, now the defrost time DDT of described air-conditioner is DT minute; When described air-conditioner enters defrost phase, M running time of described compressor is greater than the second scheduled time M2 and is less than or equal to the 3rd scheduled time M3, and now the defrost time DDT of described air-conditioner is DT+1 minute; When described air-conditioner enters defrost phase, M running time of described compressor is greater than the 3rd scheduled time M3 and is less than or equal to the 4th scheduled time M4, and now the defrost time DDT of described air-conditioner is DT+2 minute; When described air-conditioner enters defrost phase, when M running time of described compressor is greater than the 4th scheduled time M4 and is less than or equal to the 5th scheduled time M5, now the defrost time DDT of described air-conditioner is DT+3 minute; When described air-conditioner enters defrost phase, when M running time of described compressor is greater than the 5th scheduled time M5, now the defrost time DDT of described air-conditioner is DT+4 minute, wherein, when the defrost time DDT of air-conditioner is greater than defrost time maximum, using defrost time maximum as the defrost time.
According to the defrosting control method of the air-conditioner of the embodiment of the present invention, by according to the running time of compressor and the situation of difference △ H and the first predetermined value TS1, the defrost time to air-conditioner adjusts, the unnecessary defrost time can be reduced, increase the effective time that air conditioner heat-production runs, improve the heating capacity of air-conditioner.
In examples more of the present invention, described defrost time maximum is 12 minutes.
According to some embodiments of the present invention, the defrosting control method of described air-conditioner also comprises the steps: S6: when detecting that M running time of described compressor is greater than the first scheduled time M1, detects described air-conditioner and whether occurs low speed wind model or occur blowing-out machine phenomenon; S7: if when occurring low speed wind model or occur blowing-out machine phenomenon, then when detecting that described difference △ H is more than or equal to the first predetermined value TS1 and detects that M running time of described compressor is more than or equal to the second scheduled time M2, control described air-conditioner and enter defrost phase, and defrost time DDT is more than or equal to the 6th scheduled time M6, if do not occur low speed wind model or occur blowing-out machine phenomenon, then enter into step S3.Thus the defrosting control method of air-conditioner according to the embodiment of the present invention, the frostless defrost situation under worst cold case can be reduced, increase effective heating operation time, improve heating capacity.
Alternatively, described 6th scheduled time M6 is 10 minutes.
According to some embodiments of the present invention, the wind speed of described air-conditioner is many grades, and described air-conditioner is different in described second predetermined value of each grade.
Particularly, when M running time of described compressor meets: during M2≤M≤M5, described air-conditioner is respectively D1, D2, D3 in the second predetermined value of high wind shelves, apoplexy shelves, low wind shelves, when M running time of described compressor meets: during M > M5, described air-conditioner is respectively D1+2, D2+2, D3+2 in the second predetermined value of high wind shelves, apoplexy shelves, low wind shelves, wherein, D1 < D2 < D3.
More specifically, in step s3, when the wind speed of described air-conditioner changes, △ Tmax value again.Thus ensure the reliability of the defrosting control method of this air-conditioner.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the flow chart of the defrosting control method of air-conditioner according to the embodiment of the present invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.Term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.
Below with reference to Fig. 1, the defrosting control method according to a kind of air-conditioner of the embodiment of the present invention is described, wherein, air-conditioner comprises the elements such as indoor heat exchanger, compressor, blower fan, the refrigeration principle of air-conditioner and heat principle etc. known by those skilled in the art, is just not described in detail here.
According to the defrosting control method of the air-conditioner of the embodiment of the present invention, as shown in Figure 1, comprise the steps:
S1: control air-conditioner and enter heating mode, detect M running time of the compressor of air-conditioner.
S2: when detecting that M running time of compressor is greater than the first scheduled time M1, detect the pipe temperature T2 of the indoor heat exchanger of indoor temperature T1 and air-conditioner and compare to obtain difference △ T=T2-T1, particularly, the pipe temperature T2 of indoor temperature T1 and indoor heat exchanger is detected by temperature sensor.By after M running time of compressor is greater than the first scheduled time M1, detect the pipe temperature T2 of indoor temperature T1 and indoor heat exchanger again, can ensure that the data detected are really effective, because in the starting stage of compressor operating, the various parameters of heating are not all stablized, and this is if sampling certainly will affect the authenticity of data.And be worth understanding, should be that the pipe temperature T2 of indoor temperature T1 and the indoor heat exchanger detected by synchronization compares to obtain difference △ T, wherein, the first scheduled time M1 specifically can set according to the actual performance of different compressors.
S3: the maximum △ T obtaining difference is compared to the difference △ T detected
mAXparticularly, be in the heating operations of air-conditioner in the running of compressor, indoor temperature T1 can raise gradually, and the pipe temperature T2 of indoor heat exchanger can lower gradually, in the process, the difference △ T detected ceaselessly is compared, when occurring that a rear difference △ T is less than previous difference △ T, showing that decline phenomenon appears in difference △ T, namely obtaining the maximum △ T of difference
mAX, the difference △ T now detected subsequently is all less than the maximum △ T of difference
mAX.Then △ T is judged
mAXand the difference △ H=△ T between the difference △ T detected subsequently
mAXwhether-△ T is greater than the first predetermined value TS1.
The maximum △ T obtaining difference is being compared to the difference △ T detected
mAXprocess in, difference △ T and the second predetermined value TS2 is compared simultaneously.Wherein, the first predetermined value TS1 and the second predetermined value TS2 specifically sets according to the actual performance of different air-conditioner.
S4: when difference △ H is greater than the first predetermined value TS1 and difference △ T is less than the second predetermined value, when M running time of compressor is more than or equal to the second scheduled time M2 simultaneously, control air-conditioner and enter defrost phase, wherein the second scheduled time M2 is greater than the first scheduled time M1.That is, now control air-conditioner to enter defrost phase must meet three conditions simultaneously: first condition is that difference △ H is greater than the first predetermined value TS1, second condition is that difference △ T is less than the second predetermined value TS2,3rd condition is that M running time of compressor is more than or equal to the second scheduled time M2, when occurring that one of them condition does not meet, air-conditioner does not enter defrost phase, but continues to judge above-mentioned three conditions.
S5: in defrost phase, when air-conditioner has run defrost time DDT, defrost terminates, and gets back to step S1, so repeats.
According to the defrosting control method of the air-conditioner of the embodiment of the present invention, by detecting the pipe temperature T2 of the indoor heat exchanger of indoor temperature T1 and air-conditioner, and by comparing the maximum △ T obtaining difference
mAX, now by maximum △ T
mAXdifference △ H between the difference △ T detected subsequently and the first predetermined value TS1 compares, difference △ T and the second predetermined value TS2 is compared simultaneously, when to meet difference △ H is more than or equal to the first predetermined value TS1, difference △ T is less than the second predetermined value TS2 and compressor M running time and be more than or equal to the second scheduled time M2 simultaneously, control air-conditioner and enter defrost phase, thus can avoid occurring frostless defrost state, ensure the heating effect of air-conditioner.
Particularly, the difference △ H detected when entering defrost phase according to air-conditioner and the situation of the first predetermined value TS1 judge the numerical value of defrost time DDT, and now defrost time DDT is DT minute, and comprise following 6 kinds of situations:
When △ H >=TS1 being detected, within DT minute, be predetermined value DT1;
When △ H >=TS1+2 DEG C being detected, within DT minute, be DT1+1 minute;
When △ H >=TS1+4 DEG C being detected, within DT minute, be DT1+2 minute;
When △ H >=TS1+6 DEG C being detected, within DT minute, be DT1+3 minute;
When △ H >=TS1+8 DEG C being detected, within DT minute, be DT1+4 minute;
When △ H >=TS1+10 DEG C being detected, within DT minute, be DT1+5 minute, that is, when air-conditioner enters into defrost phase, the defrost time of air-conditioner adjusts according to above-mentioned six kinds of situations, thus according to different difference variation situations, can judge the situation of heat exchanger frosting, according to the difference of frosting situation, select the corresponding defrost time.Select shorter defrost running time when frosting is not serious, increase effective heating operation time, improve heating capacity, when frosting is serious, increases defrost running time, ensure that defrosting is clean.
Further, the defrosting control method of air-conditioner of the present invention also adjusts defrost time DDT according to M running time of compressor, now comprises again following five kinds of situations:
The first situation is when air-conditioner enters defrost phase, compressor running time, M was the second scheduled time M2 time, now the defrost time DDT of air-conditioner is DT minute, that is, when occurring that difference △ H is more than or equal to the first predetermined value TS1 and difference △ T is less than the second predetermined value TS2, if when now M running time of compressor does not reach the second scheduled time M2, then when compressor operating being detected to the second scheduled time M2, air-conditioner enters into defrost phase, now defrost time DDT is DT minute, that is, only according to the situation determination defrost time of difference △ H and the first predetermined value TS1.
The second situation is when air-conditioner enters defrost phase, M running time of compressor is greater than the second scheduled time M2 and is less than or equal to the 3rd scheduled time M3, now the defrost time DDT of air-conditioner is DT+1 minute, that is, be greater than the second scheduled time M2 as M running time of compressor and be less than or equal to the 3rd scheduled time M3, just meet difference △ H be more than or equal to the first predetermined value TS1 and difference △ T is less than the second predetermined value TS2 time, now control air-conditioner and enter into defrost phase, and make the defrost time DDT of air-conditioner be DT+1 minute, that is, the basis of the defrost time determined according to the situation of difference △ H and the first predetermined value TS1 adds 1 minute.
The third situation is when air-conditioner enters defrost phase, M running time of compressor is greater than the 3rd scheduled time M3 and is less than or equal to the 4th scheduled time M4, now the defrost time DDT of air-conditioner is DT+2 minute, that is, be greater than the 3rd scheduled time M3 as M running time of compressor and be less than or equal to the 4th scheduled time M4, just meet difference △ H be more than or equal to the first predetermined value TS1 and difference △ T is less than the second predetermined value TS2 time, now control air-conditioner and enter into defrost phase, and make the defrost time DDT of air-conditioner be DT+2 minute, that is, the basis of the defrost time determined according to the situation of difference △ H and the first predetermined value TS1 adds 2 minutes.
4th kind of situation is when air-conditioner enters defrost phase, when M running time of compressor is greater than the 4th scheduled time M4 and is less than or equal to the 5th scheduled time M5, now the defrost time DDT of air-conditioner is DT+3 minute, that is, be greater than the 4th scheduled time M4 as M running time of compressor and be less than or equal to the 5th scheduled time M5, just meet difference △ H be more than or equal to the first predetermined value TS1 and difference △ T is less than the second predetermined value TS2 time, now control air-conditioner and enter into defrost phase, and make the defrost time DDT of air-conditioner be DT+3 minute, that is, the basis of the defrost time determined according to the situation of difference △ H and the first predetermined value TS1 adds 3 minutes.
5th kind of situation is when air-conditioner enters defrost phase, when M running time of compressor is greater than the 5th scheduled time M5, now the defrost time DDT of air-conditioner is DT+4 minute, that is, when M running time of compressor is greater than the 5th scheduled time M5, just meet difference △ H be more than or equal to the first predetermined value TS1 and difference △ T is less than the second predetermined value TS2 time, now control air-conditioner and enter into defrost phase, and make the defrost time DDT of air-conditioner be DT+4 minute, that is, the basis of the defrost time determined according to the situation of difference △ H and the first predetermined value TS1 adds 4 minutes.
Wherein, when the defrost time DDT of air-conditioner is greater than defrost time maximum, using defrost time maximum as the defrost time.That is, the defrost time maximum duration of air-conditioner is exactly defrost time maximum, and how the time adds up all can not exceed defrost time maximum.In some embodiments of the invention, defrost time maximum is 12 minutes.
Describe particularly with the judgement of two specific embodiments to defrost time DDT below, such as when occur a kind of situation be: in the second scheduled time M2, meet △ H >=TS1 and meet difference △ T be less than the second predetermined value TS2 time, then when compressor operating is to the second scheduled time M2 minute, enter into defrost phase, if when the situation now between difference △ H and the first predetermined value TS1 is still △ H >=TS1, then the defrost time of air-conditioner is DT1 minute, if when the situation between difference △ H and the first predetermined value TS1 is changed to △ H >=TS1+2 DEG C, then the defrost time of air-conditioner is DT1+1 minute.Another kind of situation is: in the second scheduled time M2, only meet △ H >=TS1 but do not meet difference △ T when being less than the second predetermined value TS2, then air-conditioner continues to run, when running to the 3rd scheduled time M3, meet difference △ T when being less than the second predetermined value TS2, then enter into defrost phase, if when the situation between this time difference value △ H and first predetermined value TS1 becomes △ H >=TS1+6 DEG C, then defrost time DDT=DT1+3+1 minute.
According to the defrosting control method of the air-conditioner of the embodiment of the present invention, by according to the running time of compressor and the situation of difference △ H and the first predetermined value TS1, the defrost time to air-conditioner adjusts, the unnecessary defrost time can be reduced, increase the effective time that air conditioner heat-production runs, improve the heating capacity of air-conditioner.
According to some embodiments of the present invention, the defrosting control method of air-conditioner also comprises the steps:
S6: when detecting that M running time of compressor is greater than the first scheduled time M1, detect air-conditioner whether to occur low speed wind model or occur blowing-out machine phenomenon, wherein, detection air-conditioner in any way can be adopted whether occur low speed wind model or occur blowing-out machine phenomenon, detection method known by those skilled in the art, is just not described in detail here.
S7: if when occurring low speed wind model or occur blowing-out machine phenomenon, then when detecting that difference △ H is more than or equal to the first predetermined value TS1 and detects that M running time of compressor is more than or equal to the second scheduled time M2, control air-conditioner and enter defrost phase, and defrost time DDT is more than or equal to the 6th scheduled time M6, if do not occur low speed wind model or occur blowing-out machine phenomenon, then enter into step S3.In examples more of the present invention, the 6th scheduled time M6 is 10 minutes.
That is, when in the running at compressor, if there is low speed wind model or occur blowing-out machine phenomenon, if now detect, difference △ H is greater than the first predetermined value TS1 and M running time simultaneously meeting compressor is more than or equal to the second scheduled time M2 time, then control air-conditioner and enter into defrost phase, now the defrost time of air-conditioner is according to difference △ H and the situation of the first predetermined value TS1 and adjust the running time of compressor, if according to the situation of difference △ H and the first predetermined value TS1 and carrying out the running time of compressor adjust the defrost time value drawn be less than the 6th scheduled time M6 time, then defrost by the time span of the 6th scheduled time M6, if according to the situation of difference △ H and the first predetermined value TS1 and carrying out the running time of compressor adjust the defrost time value drawn be greater than the 6th scheduled time M6 time, then by according to the situation of difference △ H and the first predetermined value TS1 and carry out adjusting the defrost time value drawn the running time of compressor and defrost.
Thus the defrosting control method of air-conditioner according to the embodiment of the present invention, the frostless defrost situation under worst cold case can be reduced, increase effective heating operation time, improve heating capacity.
In some embodiments of the invention, the wind speed of air-conditioner is many grades, air-conditioner is different in second predetermined value of each grade, that is, air-conditioner can comprise high wind shelves, apoplexy shelves and low wind shelves, and the second predetermined value when the second predetermined value when the second predetermined value when air-conditioner is in high wind shelves, air-conditioner are in apoplexy shelves and air-conditioner are in low wind shelves is all different.Wherein, what deserves to be explained is, because air-conditioner is in heating process, the air quantity of the Guan Wenyu indoor fan of indoor heat exchanger is relevant, and along with the increase of air quantity, the Guan Wenhui of indoor heat exchanger declines to some extent, the maximum △ T of the difference between the pipe temperature T2 of therefore indoor temperature T1 and indoor heat exchanger
mAXalso can change along with the change of fan delivery, that is, the maximum △ T of the difference that air-conditioner obtains at each gear
mAXall different, in other words, when the wind speed of air-conditioner changes, △ Tmax value again.
Particularly, when M running time of compressor meets: during M2≤M≤M5, air-conditioner is respectively D1, D2, D3 in the second predetermined value of high wind shelves, apoplexy shelves, low wind shelves, when M running time of compressor meets: during M > M5, air-conditioner is respectively D1+2, D2+2, D3+2 in the second predetermined value of high wind shelves, apoplexy shelves, low wind shelves, wherein, D1 < D2 < D3.
Below with reference to Fig. 1, a kind of according to the preferred embodiment of the invention defrosting control method of air-conditioner is described, wherein, this defrosting control method meet among condition 1 described below and condition 2 any one time can enter into defrost phase.
Be described below in detail according to the condition 1 in the defrosting control method of the embodiment of the present invention, condition 1 needs again to meet three sub-conditions 1.1,1.2,1.3 simultaneously just can enter defrost phase.
Condition 1: defrost situation when being in high wind shelves, apoplexy shelves and low wind shelves three kinds of situations for air-conditioner
1.1: the continuous operating time M that heats of compressor is more than or equal to the second scheduled time M2
Difference △ T between 1.2: indoor temperature T1 and the pipe temperature T2 of indoor heat exchanger meets following table and requires:
When the Cumulative Elapsed Time M of compressor is between the second scheduled time M2 and the 5th scheduled time M5, then difference △ T satisfy condition as follows:
| Wind shelves | △T |
| Gao Feng | ＜D1℃ |
| Apoplexy | ＜D2℃ |
| Low wind | ＜D3℃ |
Wherein, D1, D2, D3 are respectively corresponding temperature value, can arrange different values according to the type of different air-conditioners, and D1 < D2 < D3.
When the Cumulative Elapsed Time M of compressor is greater than the 5th scheduled time M5, then difference △ T satisfy condition as follows:
| Wind shelves | △T |
| Gao Feng | ＜D1+2℃ |
| Apoplexy | ＜D2+2℃ |
| Low wind | ＜D3+2℃ |
1.3: when compressor Cumulative Elapsed Time M is greater than the first scheduled time M1, difference △ H is greater than the first predetermined value TS1, now it should be noted that, in the running of compressor, when appearance difference △ H is greater than the first predetermined value TS1, then this condition can meet until enter defrost phase always.
If condition 1.3 is met prior to condition 1.1 or 1.2, and in the process met in wait condition 1.1 and condition 1.2, the change that situation between difference △ H and the first predetermined value TS1 is continuing, now will time required for the situation determination defrost of difference △ H and the first predetermined value TS1, be now divided into six kinds of situations:
When △ H >=TS1 being detected, described DT minute is DT1 minute;
When △ H >=TS1+2 DEG C being detected, described DT minute is DT1+1 minute;
When △ H >=TS1+4 DEG C being detected, described DT minute is DT1+2 minute;
When △ H >=TS1+6 DEG C being detected, described DT minute is DT1+3 minute;
When △ H >=TS1+8 DEG C being detected, described DT minute is DT1+4 minute;
When △ H >=TS1+10 DEG C being detected, described DT minute is DT1+5 minute.
Wherein, when determining the time required for defrost, also should adjust to obtain final defrost time DDT to defrost time DDT according to the running time of compressor, now can be divided into five kinds of situations:
As M=M2, then with the defrost time DDT that the time span determined in condition 1.3 is final;
As M2 < M≤M3, then on the basis of the time determined according to condition 1.3, add 1 minute;
As M3 < M≤M4, then on the basis of the time determined according to condition 1.3, add 2 minutes;
As M4 < M≤M5, then on the basis of the time determined according to condition 1.3, add 3 minutes;
As M5 < M, then on the basis of the time determined according to condition 1.3, add 4 minutes, wherein, the defrost time, DDT can not exceed defrost time maximum.
Wherein, when to appear at for continuous 3 times enter defrost time △ H be more than or equal to TS1+6 DEG C, then defrost time is next time adjusted to defrost time maximum.
Condition 2: the defrost situation under occurring low speed wind model for air-conditioner or occurring blowing-out machine phenomenon.
After compressor accumulation operation first scheduled time M1, if there is low speed wind model or occur blowing-out machine phenomenon, if now meet difference △ H when being more than or equal to the first predetermined value TS1 and detecting that M running time of compressor is more than or equal to the second scheduled time M2 simultaneously, air-conditioner enters into defrost phase, the defrost time is determined according to the requirement in condition 1, but the defrost time must be more than or equal to the 6th scheduled time M6, that is, when the defrost time determined according to condition 1 is less than or equal to the 6th scheduled time M6, then defrost by the 6th scheduled time M6, when the defrost time determined according to condition 1 is greater than the 6th scheduled time M6, then according to condition the 1 defrost time determined defrosted.
According to the defrosting control method of the air-conditioner of the embodiment of the present invention, not only can reduce the frostless defrost situation under worst cold case, increase effective heating operation time, improve heating capacity, defrosting control method of the present invention is according to different difference variation situations simultaneously, the situation of automatic decision heat exchanger frosting, according to the difference of frosting situation, select the corresponding defrost time, select the shorter defrost time when frosting is not serious, increase effective heating operation time, improve heating capacity.When frosting situation is serious, increase the Defrost operation time, ensure that defrosting is clean.
Be described in detail according to the defrosting control method of a specific embodiment to air-conditioner of the present invention below.
Condition 1:
1.1: the continuous operating time M that heats of compressor is more than or equal to 45 minutes
Difference △ T between 1.2: indoor temperature T1 and the pipe temperature T2 of indoor heat exchanger meets following table and requires:
When the Cumulative Elapsed Time M of compressor is between 45-120 minute, then difference △ T satisfy condition as follows:
| Wind shelves | △T |
| Gao Feng | ＜14℃ |
| Apoplexy | ＜15℃ |
| Low wind | ＜18℃ |
When the Cumulative Elapsed Time M of compressor is more than 120 minutes, then difference △ T satisfy condition as follows:
| Wind shelves | △T |
| Gao Feng | ＜（14+2）℃ |
| Apoplexy | ＜（15+2）℃ |
| Low wind | ＜（18+2）℃ |
1.3: after compressor accumulation operation 8 minutes, difference △ H >=2 DEG C, now it should be noted that, in the running of compressor, when appearance difference △ H is greater than the first predetermined value TS1, then this condition can meet until enter defrost phase always.
If condition 1.3 is met prior to condition 1.1 or 1.2, and in the process met in wait condition 1.1 and condition 1.2, the change that situation between difference △ H and the first predetermined value TS1 is continuing, now will time required for the situation determination defrost of difference △ H and the first predetermined value TS1, be now divided into six kinds of situations:
When △ H >=2 DEG C being detected, described DT minute is 5 minutes;
When △ H >=(2+2) DEG C being detected, described DT minute is 5+1 minute;
When △ H >=(2+4) DEG C being detected, described DT minute is 5+2 minute;
When △ H >=(2+6) DEG C being detected, described DT minute is 5+3 minute;
When △ H >=(2+8) DEG C being detected, described DT minute is 5+4 minute;
When △ H >=(2+10) DEG C being detected, described DT minute is 5+5 minute.
Wherein, when determining the time required for defrost, also should adjust to obtain final defrost time DDT to defrost time DDT according to the running time of compressor, now can be divided into five kinds of situations:
As M=45, then with the defrost time DDT that the time span determined in condition 1.3 is final;
When 45 < M≤60, then on the basis of the time determined according to condition 1.3, add 1 minute;
When 60 < M≤90, then on the basis of the time determined according to condition 1.3, add 2 minutes;
When 90 < M≤120, then on the basis of the time determined according to condition 1.3, add 3 minutes;
As 120 < M, then on the basis of the time determined according to condition 1.3, add 4 minutes, wherein, defrost time DDT can not exceed defrost time maximum 12 minutes, and how adding up regardless of the time all can not more than 12 minute.
Wherein, when to appear at for continuous 3 times enter defrost time △ H be more than or equal to (2+6) DEG C, then defrost time is next time adjusted to 12 minutes.
Condition 2: the defrost situation under occurring low speed wind model for air-conditioner or occurring blowing-out machine phenomenon.
Compressor accumulation operation is after 8 minutes, if there is low speed wind model or occur blowing-out machine phenomenon, if now meet difference △ H >=2 DEG C and detect that the running time of compressor is behind M >=45 minute simultaneously, air-conditioner enters into the defrost stage, the defrost time is determined according to the requirement in condition 1, but the defrost time must be more than or equal to 10 minutes, that is, when the defrost time determined according to condition 1 is less than or equal to 10 minutes, then defrosted by 10 minutes, when the defrost time determined according to condition 1 is greater than 10 minutes, then according to condition the 1 defrost time determined defrosted.
Now illustrate as follows according to above defrost optimum configurations:
1, heat high wind to run, run and start to record △ T after 8 minutes, and compare △ T
mAXif satisfied condition 1.3 i.e. △ H>=2+2 DEG C in 45 minutes, and the 1.2 i.e. △ T < 14 DEG C that satisfy condition, after running to 45 minutes, then enter defrosting, if now condition 1.3 is still △ H>=2+2 DEG C, then the defrost time is 6 minutes, and the defrost time arrives, then exit defrosting.
2, heat high wind to run, run and start to record △ T after 8 minutes, and compare △ T
mAXif met 1.3 conditions and △ H>=2 DEG C in 45 minutes, but do not satisfy condition 1.2, then air-conditioner continues to run, and when running to 90 minutes, satisfy condition 1.2 i.e. △ T < 14 DEG C, then enter defrost.If now condition 1.3 has been changed to △ H >=2+6 DEG C.Then the defrost time is 5+3+2=10 minute, and the defrost time arrives, then exit defrost.
3. heat high wind to run, run and start to record △ T after 8 minutes, and compare △ T
mAXif just satisfied condition 1.3 i.e. △ H>=2+10 DEG C after 120 minutes, and the 1.2 i.e. △ T < 14 DEG C that satisfy condition, then enter defrost.Then the defrost time is 5+5+4=14 minute, but is 12 minutes because setting defrost time maximum, then the actual defrost time is 12 minutes.The defrost time arrives, then exit defrost.
4. heat high wind to run, run and start to record △ T after 8 minutes, and compare △ T
mAXif, or there is low speed wind model blowing-out machine phenomenon in running 45 minutes, and △ H>=2 DEG C, after running to 45 minutes, then enter defrosting, defrosting time is 10 minutes.The defrost time arrives, then exit defrost.
According to the air-conditioner of the embodiment of the present invention other form and operation be all known for those of ordinary skills, be not described in detail here.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (9)
1. a defrosting control method for air-conditioner, is characterized in that, comprises the steps:
S1: control described air-conditioner and enter heating mode, detects M running time of the compressor of described air-conditioner;
S2: when detecting that M running time of described compressor is greater than the first scheduled time M1, detects the pipe temperature T2 of the indoor heat exchanger of indoor temperature T1 and described air-conditioner and compares to obtain difference △ T=T2-T1;
S3: the maximum △ T obtaining difference is compared to the difference △ T detected
mAX, and judge △ T
mAXand the difference △ H=△ T between the difference △ T detected subsequently
mAXwhether-△ T is greater than the first predetermined value TS1, is compared by difference △ T and the second predetermined value TS2 simultaneously, and the difference △ T wherein detected subsequently is less than the maximum △ T of difference
mAX;
S4: when difference △ H is more than or equal to the first predetermined value TS1 and difference △ T is less than the second predetermined value TS2, when M running time of described compressor is more than or equal to the second scheduled time M2 simultaneously, control described air-conditioner and enter defrost phase, wherein the second scheduled time M2 is greater than the first scheduled time M1;
S5: in described defrost phase, when described air-conditioner has run defrost time DDT, defrost terminates, and gets back to step S1.
2. the defrosting control method of air-conditioner according to claim 1, it is characterized in that, the described difference △ H detected when entering defrost phase according to described air-conditioner and the situation of the first predetermined value TS1 judge the numerical value of defrost time DDT, and now defrost time DDT is DT minute:
When △ H >=TS1 being detected, described DT minute is DT1 minute;
When △ H >=TS1+2 DEG C being detected, described DT minute is DT1+1 minute;
When △ H >=TS1+4 DEG C being detected, described DT minute is DT1+2 minute;
When △ H >=TS1+6 DEG C being detected, described DT minute is DT1+3 minute;
When △ H >=TS1+8 DEG C being detected, described DT minute is DT1+4 minute;
When △ H >=TS1+10 DEG C being detected, described DT minute is DT1+5 minute.
3. the defrosting control method of air-conditioner according to claim 2, is characterized in that, adjusts further according to M running time of compressor to defrost time DDT:
When described air-conditioner enters defrost phase, described compressor running time, M was the second scheduled time M2 time, now the defrost time DDT of described air-conditioner is DT minute;
When described air-conditioner enters defrost phase, M running time of described compressor is greater than the second scheduled time M2 and is less than or equal to the 3rd scheduled time M3, and now the defrost time DDT of described air-conditioner is DT+1 minute;
When described air-conditioner enters defrost phase, M running time of described compressor is greater than the 3rd scheduled time M3 and is less than or equal to the 4th scheduled time M4, and now the defrost time DDT of described air-conditioner is DT+2 minute;
When described air-conditioner enters defrost phase, when M running time of described compressor is greater than the 4th scheduled time M4 and is less than or equal to the 5th scheduled time M5, now the defrost time DDT of described air-conditioner is DT+3 minute;
When described air-conditioner enters defrost phase, when M running time of described compressor is greater than the 5th scheduled time M5, now the defrost time DDT of described air-conditioner is DT+4 minute, wherein, when the defrost time DDT of air-conditioner is greater than defrost time maximum, using defrost time maximum as the defrost time.
4. the defrosting control method of air-conditioner according to claim 3, is characterized in that, described defrost time maximum is 12 minutes.
5. the defrosting control method of air-conditioner according to claim 3, is characterized in that, also comprises the steps:
S6: when detecting that M running time of described compressor is greater than the first scheduled time M1, detects described air-conditioner and whether occurs low speed wind model or occur blowing-out machine phenomenon;
S7: if when occurring low speed wind model or occur blowing-out machine phenomenon, then when detecting that described difference △ H is more than or equal to the first predetermined value TS1 and detects that M running time of described compressor is more than or equal to the second scheduled time M2, control described air-conditioner and enter defrost phase, and defrost time DDT is more than or equal to the 6th scheduled time M6, if do not occur low speed wind model or occur blowing-out machine phenomenon, then enter into step S3.
6. the defrosting control method of air-conditioner according to claim 5, is characterized in that, described 6th scheduled time M6 is 10 minutes.
7. the defrosting control method of the air-conditioner according to any one of claim 2-6, is characterized in that, the wind speed of described air-conditioner is many grades, and described air-conditioner is different in described second predetermined value of each grade.
8. the defrosting control method of air-conditioner according to claim 7, it is characterized in that, when M running time of described compressor meets: during M2≤M≤M5, described air-conditioner is respectively D1, D2, D3 in the second predetermined value of high wind shelves, apoplexy shelves, low wind shelves, when M running time of described compressor meets: during M > M5, described air-conditioner is respectively D1+2, D2+2, D3+2 in the second predetermined value of high wind shelves, apoplexy shelves, low wind shelves, wherein, D1 < D2 < D3.
9. the defrosting control method of air-conditioner according to claim 8, is characterized in that, in step s3, when the wind speed of described air-conditioner changes, and △ Tmax value again.
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| CN105444344A (en) * | 2015-11-09 | 2016-03-30 | 广东美的制冷设备有限公司 | Defrosting control method of air conditioner, defrosting control device of air conditioner and air conditioner |
| CN108088055A (en) * | 2017-12-19 | 2018-05-29 | 海信（广东）空调有限公司 | Control method for frequency conversion air conditioner and device |
| CN108917094A (en) * | 2018-07-18 | 2018-11-30 | 奥克斯空调股份有限公司 | A kind of defrosting control method, device and air conditioner |
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| CN110631204A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN110631207A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN110631189A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN110631208A (en) * | 2019-09-30 | 2019-12-31 | 广东美的暖通设备有限公司 | Operation control method, operation control device, air conditioning system, and storage medium |
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| CN108917094A (en) * | 2018-07-18 | 2018-11-30 | 奥克斯空调股份有限公司 | A kind of defrosting control method, device and air conditioner |
| CN109458693A (en) * | 2018-11-01 | 2019-03-12 | 奥克斯空调股份有限公司 | A kind of outer blower control method of air conditioner, device and air conditioner |
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| CN112050361A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050361B (en) * | 2019-06-06 | 2022-07-19 | 重庆海尔空调器有限公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110631208A (en) * | 2019-09-30 | 2019-12-31 | 广东美的暖通设备有限公司 | Operation control method, operation control device, air conditioning system, and storage medium |
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