CN105091197A - Air conditioner defrosting control method and device - Google Patents
Air conditioner defrosting control method and device Download PDFInfo
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- CN105091197A CN105091197A CN201410199588.8A CN201410199588A CN105091197A CN 105091197 A CN105091197 A CN 105091197A CN 201410199588 A CN201410199588 A CN 201410199588A CN 105091197 A CN105091197 A CN 105091197A
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- 238000010257 thawing Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004378 air conditioning Methods 0.000 claims description 243
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Abstract
The invention discloses an air conditioner defrosting control method and device. The air conditioner defrosting control method comprises the steps of acquiring tube temperature of an air conditioner outdoor heat exchange tube once at interval of a preset time, wherein first tube temperature of the air conditioner outdoor heat exchange tube is acquired at a first moment, second tube temperature of the air conditioner outdoor heat exchange tube is acquired at a second moment, and the interval between the first moment and the second is the preset time; calculating a temperature difference between the first tube temperature and initial tube temperature to acquire a first tube temperature difference, and calculating a temperature difference between the second tube temperature and the initial tube temperature to acquire a second tube temperature difference, wherein the initial tube temperature is acquired tube temperature of the air conditioner outdoor heat exchange tube before the first moment; judging whether the first tube temperature difference and the second tube temperature difference both meet preset conditions or not; and controlling an air conditioner to defrost if the first tube temperature difference and the second tube temperature difference both are judged to meet the preset conditions. By adopting the air conditioner defrosting control method and device, the problems of poorer heating effect and poorer comfort of an air conditioner in a correlation technique are solved.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of air-conditioning defrosting control method and device.
Background technology
At present, in the related, whether conventional air-conditioning defrosting control generally adopts the refrigerant temperature of the heat exchanger tube detecting air-conditioner outdoor unit evaporation side enter to control air-conditioning and whether exit defrost.Wherein, when the refrigerant temperature of heat exchanger tube air-conditioner outdoor unit evaporation side being detected is less than or equal to the first preset temperature, air-conditioning enters defrost; When the refrigerant temperature continuing heat exchanger tube air-conditioner outdoor unit evaporation side being detected is more than or equal to the second preset temperature, or when the air-conditioning defrost time reaches Preset Time, air-conditioning exits defrost.
But if when environment temperature is very low and humidity is very little, utilize above-mentioned control method to control air-conditioning defrost, then air-conditioning can enter defrost, and defrost even is sometimes unclean, and air-conditioning also can exit defrost by mistake.In addition, when compressor is just opened, because system is unstable, pipe temperature is change often, and therefore air-conditioning also there will be frequent defrost.And there is the problem of " defrost ", " defrost is unclean " and " frequent defrost " due to air-conditioning by mistake, therefore the heating effect of air-conditioning and comfortableness poor.
For the heating effect of air-conditioning in correlation technique and the poor problem of comfortableness, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is to provide a kind of air-conditioning defrosting control method and device, with the problem that the heating effect and comfortableness that solve air-conditioning in correlation technique are poor.
To achieve these goals, according to an aspect of the present invention, a kind of air-conditioning defrosting control method is provided.The method comprises: the Guan Wen obtaining heat exchanger tube outside an air conditioning chamber every Preset Time, wherein, obtain the first pipe temperature of heat exchanger tube outside air conditioning chamber in the first moment, obtain the second pipe temperature of heat exchanger tube outside air conditioning chamber in the second moment, interval Preset Time between the first moment and the second moment; Calculate the temperature difference of the first pipe temperature and original tube temperature, obtain the first pipe temperature difference, calculate the temperature difference of the second pipe temperature and original tube temperature, obtain the second pipe temperature difference, wherein, original tube temperature is the Guan Wen of heat exchanger tube outside the air conditioning chamber that obtained before the first moment; Judge whether the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned; And if judge that the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned, then control air-conditioning execution defrost.
Further, after control air-conditioning performs defrost, air-conditioning defrosting control method also comprises: after judging a period of time of air-conditioner continuous execution defrost, outside air conditioning chamber, whether the Guan Wen of heat exchanger tube is more than or equal to the first preset value; And if judge air-conditioner continuous perform a period of time of defrost after the Guan Wen of the outer heat exchanger tube in air conditioning chamber be more than or equal to the first preset value, then control air-conditioning exits defrost.
Further, original tube temperature is obtained in such a way: judge whether the running time of compressor reaches the second preset value; If judge that the running time of compressor reaches the second preset value, then obtain the 3rd pipe temperature of heat exchanger tube outside air conditioning chamber; And using the 3rd pipe temperature as original tube temperature.
Further, judge whether the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned comprising: judge whether the first pipe temperature difference and the second pipe temperature difference are all more than or equal to the default pipe temperature difference, if judge that the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned, then control air-conditioning execution defrost to comprise: if judge that the first pipe temperature difference and the second pipe temperature difference are all more than or equal to the default pipe temperature difference, then control air-conditioning and perform defrost.
Further, judge the first pipe temperature difference and the second pipe temperature difference whether all meet pre-conditioned after, air-conditioning defrosting control method also comprises: if judge that the first pipe temperature difference and the second pipe temperature difference not all meet pre-conditioned, then judge whether environment temperature meets preset range and whether reach the 3rd preset value the running time of compressor; And if judge that environment temperature meets preset range and reaches the 3rd preset value the running time of compressor, then control air-conditioning execution defrost.
To achieve these goals, according to a further aspect in the invention, a kind of air-conditioning defrosting control device is provided.This device comprises: the first acquiring unit, for obtaining the Guan Wen of heat exchanger tube outside an air conditioning chamber every Preset Time, wherein, the first pipe temperature of heat exchanger tube outside air conditioning chamber is obtained in the first moment, the second pipe temperature of heat exchanger tube outside air conditioning chamber is obtained, interval Preset Time between the first moment and the second moment in the second moment; Computing unit, for calculating the temperature difference of the first pipe temperature and original tube temperature, obtaining the first pipe temperature difference, calculating the temperature difference of the second pipe temperature and original tube temperature, obtain the second pipe temperature difference, and wherein, original tube temperature is the Guan Wen of heat exchanger tube outside the air conditioning chamber that obtained before the first moment; First judging unit, for judging whether the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned; And first control unit, for when judging the first pipe temperature difference and the second pipe temperature difference all meets pre-conditioned, controlling air-conditioning and performing defrost.
Further, this air-conditioning defrosting control device also comprises: the second judging unit, and after performing defrost at control air-conditioning, after judging a period of time of air-conditioner continuous execution defrost, outside air conditioning chamber, whether the Guan Wen of heat exchanger tube is more than or equal to the first preset value; And second control unit, for judge air-conditioner continuous perform a period of time of defrost after the Guan Wen of the outer heat exchanger tube in air conditioning chamber be more than or equal to the first preset value time, control air-conditioning exits defrost.
Further, this air-conditioning defrosting control device also comprises: second acquisition unit, and second acquisition unit is for obtaining original tube temperature, and second acquisition unit comprises: judge module, for judging whether the running time of compressor reaches the second preset value; Acquisition module, for when judging that the running time of compressor reaches the second preset value, obtains the 3rd pipe temperature of heat exchanger tube outside air conditioning chamber, and using the 3rd pipe temperature as original tube temperature.
Further, first judging unit is also for judging whether the first pipe temperature difference and the second pipe temperature difference are all more than or equal to the default pipe temperature difference, first control unit, also for when judging the first pipe temperature difference and the second pipe temperature difference is all more than or equal to the default pipe temperature difference, controlling air-conditioning and performing defrost.
Further, this air-conditioning defrosting control device also comprises: the 3rd judging unit, for judge the first pipe temperature difference and the second pipe temperature difference whether all meet pre-conditioned after, when judging the first pipe temperature difference and the second pipe temperature difference not all meets pre-conditioned, judge whether environment temperature meets preset range and whether reach the 3rd preset value the running time of compressor; And first control unit also for when judging that environment temperature meets preset range and reaches the 3rd preset value the running time of compressor, control air-conditioning perform defrost.
Pass through the present invention, adopt the Guan Wen obtaining heat exchanger tube outside an air conditioning chamber every Preset Time, wherein, obtain the first pipe temperature of heat exchanger tube outside air conditioning chamber in the first moment, the second pipe temperature of heat exchanger tube outside air conditioning chamber is obtained, interval Preset Time between the first moment and the second moment in the second moment; Calculate the temperature difference of the first pipe temperature and original tube temperature, obtain the first pipe temperature difference, calculate the temperature difference of the second pipe temperature and original tube temperature, obtain the second pipe temperature difference, wherein, original tube temperature is the Guan Wen of heat exchanger tube outside the air conditioning chamber that obtained before the first moment; Judge whether the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned; And if judge that the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned, then control air-conditioning and perform defrost, solve the heating effect of air-conditioning in correlation technique and the poor problem of comfortableness, and then improve the heating effect of air-conditioning, and reach the effect of the comfort level improving user.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of air-conditioning defrosting control device according to a first embodiment of the present invention;
Fig. 2 is the schematic diagram of air-conditioning defrosting control device according to a second embodiment of the present invention;
Fig. 3 is the flow chart of air-conditioning defrosting control method according to a first embodiment of the present invention; And
Fig. 4 is the flow chart of air-conditioning defrosting control method according to a second embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Better the present invention program is understood in order to make those skilled in the art, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment obtained under those of ordinary skill in the art do not make creative work prerequisite, all should belong to protection scope of the present invention.
It should be noted that, term " first ", " second " etc. in description of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, and intention is to cover not exclusive comprising.
According to embodiments of the invention, provide a kind of air-conditioning defrosting control device, this air-conditioning defrosting control device for improving the heating effect of air-conditioning, and for improving the comfort level of user.
Fig. 1 is the schematic diagram of air-conditioning defrosting control device according to a first embodiment of the present invention.
As shown in Figure 1, this device comprises: the first acquiring unit 10, computing unit 20, first judging unit 30 and the first control unit 40.
First acquiring unit 10 is for obtaining the Guan Wen of heat exchanger tube outside an air conditioning chamber every Preset Time.Wherein, obtain the first pipe temperature of heat exchanger tube outside air conditioning chamber in the first moment, obtain the second pipe temperature of heat exchanger tube outside air conditioning chamber in the second moment, interval Preset Time between the first moment and the second moment.In addition, the Guan Wen of heat exchanger tube outside an air conditioning chamber is obtained every Preset Time, namely, a sequence about Guan Wen can be got, and each in this sequence represents the Guan Wen of particular moment, in this sequence any two adjacent pipe temperature correspondences moment between interlude length equal Preset Time.It should be noted that, in this pipe temperature sequence, pipe temperature item number is wherein at least 2.
Such as, Preset Time can be represented with t respectively, T
n-1represent the first pipe temperature, T
nrepresent the second pipe temperature, T represent pipe temperature sequence T1, T2 ... T
n-1, T
n..., wherein, 1,2 ... n-1, n ... represent the sequence number in the moment that pipe temperature is corresponding respectively.It should be noted that, t can be 1min.
In embodiments of the present invention, can be detected by controller Perceived control thermometer bulb and obtain the Guan Wen of heat exchanger tube outside air conditioning chamber.In addition, after the Guan Wen at every turn getting the outer heat exchanger tube of air-conditioning, the Guan Wen that this gets can be stored.It should be noted that, because air-conditioning only just needs to carry out defrosting control, therefore in the present invention, under this air-conditioning defrosting control method is applied in the heating operation mode of air-conditioning under heating operation mode.
Computing unit 20, for calculating the temperature difference of the first pipe temperature and original tube temperature, obtains the first pipe temperature difference, calculates the temperature difference of the second pipe temperature and original tube temperature, obtains the second pipe temperature difference, and wherein, original tube temperature is the Guan Wen of heat exchanger tube outside the air conditioning chamber that obtained before the first moment.
Wherein, original tube temperature is the Guan Wen of heat exchanger tube outside the air conditioning chamber that obtained before the first moment.It should be noted that, original tube temperature can be the Guan Wen of compressor when just opening of air-conditioner, and it also can be the Guan Wen of compressor after unlatching a period of time of air-conditioner.It should be noted that, if due to air-condition heat exchanger frosting, then outside air conditioning chamber heat exchanger tube constant temperature decline, therefore, preferably, the temperature difference of the first pipe temperature and original tube temperature can be the difference that original tube temperature deducts the first pipe temperature herein.In like manner, the temperature difference of the second pipe temperature and original tube temperature can be the difference that original tube temperature deducts the second pipe temperature.Wherein, this original tube temperature can be designated as T0, according to aforesaid T
n-1and T
ncan represent the gentle second pipe temperature of the first pipe respectively, then the first pipe temperature difference can be (T0-T
n-1), the second pipe temperature difference can be (T0-T
n).T
n-1and T
nthe Guan Wen representated by any two adjacencies in pipe temperature sequence can be represented.
It should be noted that, can time period of growing arbitrarily of interval between the moment of the moment that original tube temperature is corresponding and the first pipe temperature correspondence, and during Section 1 in the first pipe Wen Weiguan temperature sequence, moment corresponding to the first pipe temperature can and moment corresponding to original tube temperature between the above-mentioned Preset Time in interval.
First judging unit 30 is for judging whether the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned.
It should be noted that, this is pre-conditioned can be a temperature range, and such as, this temperature range can be [△ T ,+∞], or it can be [△ T1, △ T2], and wherein, △ T can equal △ T1.Judge whether the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned, that is, judge whether the first pipe temperature difference and the second pipe temperature difference meet pre-conditioned simultaneously.Such as, the first pipe temperature difference can be judged whether within said temperature scope, and judge the second pipe temperature difference simultaneously whether within said temperature scope.Wherein, if judge that the first pipe temperature difference is within said temperature scope, and judge that the second pipe temperature difference is within the scope of said temperature simultaneously, then judge that the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned.Otherwise, if judge to only have any one Guan Wen within said temperature scope in the first pipe temperature difference and the second pipe temperature difference, or judge that these two pipe temperature difference are not all within the scope of said temperature, then judge that the first pipe temperature difference and the second pipe temperature difference not all meet pre-conditioned.
First control unit 40, for when judging the first pipe temperature difference and the second pipe temperature difference all meets pre-conditioned, controlling air-conditioning and performing defrost.
It should be noted that, if judge that the first pipe temperature difference and the second pipe temperature difference not all meet pre-conditioned, then control air-conditioning and continue to run heating mode, and circulation performs the function of said units module successively.
Only control air-conditioning when the difference of a judgement Guan Wenyu original tube temperature meets pre-conditioned and perform defrost, may exist due to temperature instability and judge that the difference of this Guan Wenyu original tube temperature meets pre-conditioned, thus causing air-conditioning defrost by mistake.And pass through the embodiment of the present invention, because needs two pipe temperature difference meet above-mentioned pre-conditioned simultaneously, and when these two pipe temperature difference are difference respectively with original tube temperature of adjacent two pipe temperature, just control air-conditioning and perform defrost, therefore the shortcoming that air-conditioning misses defrost can be overcome, thus the heating effect of air-conditioning can be improved, and improve the comfort level of user.The embodiment of the present invention judges whether to enter defrost by the reduction rate of change of detector tube temperature.Because air-condition heat exchanger is once frosting, refrigerant and air heat-exchange will weaken, and pipe temperature will reduce, and when the frost layer on heat exchanger tube reaches certain thickness, in certain hour section, pipe temperature will drop-out value to certain numerical value.And if this numerical value is more than or equal to certain temperature value (as △ T) in continuous two cycles, then judge that air-conditioning has reached defrost condition.By the embodiment of the present invention, defrost can be entered in time when air-conditioning frosting, solve the heat exchanger frosting very thick problem also not entering defrost, also can solve the problem that air-conditioning under low temperature and low humidity environment enters defrost by mistake.
Fig. 2 is the schematic diagram of air-conditioning defrosting control device according to a second embodiment of the present invention.
As shown in Figure 2, this embodiment can as preferred embodiment embodiment illustrated in fig. 1, the air-conditioning defrosting control device of this embodiment, except comprising the first acquiring unit 10 of the first embodiment, computing unit 20, first judging unit 30 and the first control unit 40, also comprises the second judging unit 50 and the second control unit 60.
First acquiring unit 10, computing unit 20, first judging unit 30 and the effect of the first control unit 40 and identical in the first embodiment, do not repeat them here.
Second judging unit 50 is for after control air-conditioning execution defrost, and after judging a period of time of air-conditioner continuous execution defrost, outside air conditioning chamber, whether the Guan Wen of heat exchanger tube is more than or equal to the first preset value.
Particularly, after control air-conditioning performs defrost, after judging a period of time of air-conditioner continuous execution defrost, outside air conditioning chamber, whether the Guan Wen of heat exchanger tube is more than or equal to the first preset value.Wherein, the first preset value can exit the Guan Wen of defrost for air-conditioning, and the Guan Wenke that this air-conditioning exits defrost thinks 12 DEG C.In addition, air-conditioner continuous performs the length of a period of time of defrost herein can be 60s.
Second control unit 60, for when the Guan Wen of heat exchanger tube is more than or equal to the first preset value outside air conditioning chamber after a period of time judging air-conditioner continuous execution defrost, controls air-conditioning and exits defrost.
It should be noted that, if judge air-conditioner continuous perform a period of time of defrost after the Guan Wen of the outer heat exchanger tube in air conditioning chamber be less than the first preset value, then control air-conditioning continuation defrost.
Because heating effect during air-conditioning execution defrosting operation is poor, and the comfort level of user is also poor, therefore, pass through the embodiment of the present invention, can prevent the frost layer on heat exchanger tube from having changed to the greatest extent, but air-conditioning is also at execution defrosting operation, thus air-conditioning can be controlled exits defrost in time, and then the heating effect of air-conditioning can be improved, and improve the comfort level of user.
Preferably, in the above embodiment of the present invention, this air-conditioning defrosting control device can also comprise: second acquisition unit.Second acquisition unit is for obtaining original tube temperature, and second acquisition unit can comprise: judge module and acquisition module.
Judge module is for judging whether the running time of compressor reaches the second preset value.Wherein, this compressor is the compressor of air-conditioning.Such as, can judge whether the running time of compressor reaches 60min.
Acquisition module is used for when judging that the running time of compressor reaches the second preset value, obtains the 3rd pipe temperature of heat exchanger tube outside air conditioning chamber, and using the 3rd pipe temperature as original tube temperature.In addition, if judge that the running time of compressor does not reach the second preset value, then control air-conditioning and continue heating operation, and before not reaching the second preset value, do not obtain any Guan Wen of heat exchanger tube outside air conditioning chamber.
Due to compressor just open time, system cloud gray model is unstable, pipe temperature can be caused often to change, thus cause the frequent defrost of air-conditioning.Pass through the embodiment of the present invention, after compressor start, after reaching the second preset value (as 60min) to compressor accumulated running time, the controller of air-conditioning just starts to obtain original tube temperature, like this, can avoid due to compressor just open time, the change of pipe temperature and the misoperation of frequent defrost that causes.In addition, reach the time interval not detecting defrost condition that the time period (as 60min) the second preset value is set as by from after compressor start to compressor accumulated running time, ensure that the continuation of air-conditioning heating effect.
Preferably, in the above embodiment of the present invention, first judging unit is also for judging whether the first pipe temperature difference and the second pipe temperature difference are all more than or equal to the default pipe temperature difference, first control unit, also for when judging the first pipe temperature difference and the second pipe temperature difference is all more than or equal to the default pipe temperature difference, controlling air-conditioning and performing defrost.
Wherein, if judge that the first pipe temperature difference and the second pipe temperature difference are not all more than or equal to the default pipe temperature difference, then do not control air-conditioning and perform defrost, and continue circulation and perform " obtaining the Guan Wen of heat exchanger tube outside an air conditioning chamber every Preset Time ", " calculate the temperature difference of the first pipe temperature and original tube temperature, obtain the first pipe temperature difference, calculate the temperature difference of the second pipe temperature and original tube temperature, obtain the second pipe temperature difference ", " judge whether the first pipe temperature difference and the second pipe temperature difference are all more than or equal to the default pipe temperature difference ", if " judge that the first pipe temperature difference and the second pipe temperature difference are all more than or equal to the default pipe temperature difference, then control air-conditioning perform defrost " step.Preferably, preset the pipe temperature difference and can be 5 DEG C.
Such as, the first pipe temperature difference can be (T0-T1), and the second pipe temperature difference can be (T0-T2), presetting the pipe temperature difference can be △ T, wherein, (T0-T1)≤△ T and (during T0-T2)≤△ T, then control air-conditioning perform defrost; Otherwise meet following condition for the moment: 1) (T0-T1)≤△ T and (T0-T2) < △ T time; 2) (T0-T1) < △ T and (during T0-T2)≤△ T; 3) (T0-T1) < △ T and (T0-T2) < △ T time, then do not control air-conditioning and perform defrost, but control air-conditioning continuation operation heating mode, and whether this air-conditioning of continuation detection meets defrost condition.Such as, first the pipe temperature T3 of heat exchanger tube outside air conditioning chamber can be obtained every aforementioned Preset Time, calculate the pipe temperature difference (T0-T3) of T3 and T0 again, then judge whether to meet (T0-T2)≤△ T and (T0-T3)≤△ T, wherein, if judge (T0-T2)≤△ T and (T0-T3)≤△ T, then control air-conditioning perform defrost, otherwise do not control air-conditioning perform defrost.
It should be noted that, the relation not controlling (T0-T2) and △ T when air-conditioning performs defrost and (T0-T3) and △ T with do not control the relation object of (T0-T1) and △ T and (T0-T2) and △ T when air-conditioning performs defrost seemingly, do not repeat them here.
Preferably, in the above embodiment of the present invention, this air-conditioning defrosting control device can also comprise: the 3rd judging unit and the first control unit.
3rd judging unit be used for judge the first pipe temperature difference and the second pipe temperature difference whether all meet pre-conditioned after, when judging the first pipe temperature difference and the second pipe temperature difference not all meets pre-conditioned, judge whether environment temperature meets preset range and whether reach the 3rd preset value the running time of compressor.Wherein, the temperature of the surrounding environment of environment temperature residing for air-conditioning.
First control unit, also for when judging that environment temperature meets preset range and reaches the 3rd preset value the running time of compressor, controlling air-conditioning and performing defrost.It should be noted that, enforcing defrost for controlling air-conditioning herein.
Such as, when the first pipe temperature difference and the second pipe temperature difference not all meet pre-conditioned, can judge whether environment temperature is more than or equal to-10 DEG C and is less than or equal to 2 DEG C, whether reach 180min the running time of compressor simultaneously, if judge that environment temperature is more than or equal to-10 DEG C and is less than or equal to 2 DEG C, reach 180min the running time of compressor simultaneously, then can control air-conditioning and enforce defrost, otherwise do not control air-conditioning compulsory execution defrost.
Like this, by the embodiment of the present invention, air-conditioning can be controlled and perform defrost in time, thus the heating effect of air-conditioning and the comfort level of user's using air-condition can be ensured.
According to embodiments of the invention, provide a kind of air-conditioning defrosting control method, this air-conditioning defrosting control method for improving the heating effect of air-conditioning, and for improving the comfort level of user.This air-conditioning defrosting control method may operate on air-conditioning.It should be noted that, the air-conditioning defrosting control method that the embodiment of the present invention provides can be performed by the air-conditioning defrosting control device of the embodiment of the present invention, and the air-conditioning defrosting control device of the embodiment of the present invention also may be used for the air-conditioning defrosting control method performing the embodiment of the present invention.
Fig. 3 is the flow chart of air-conditioning defrosting control method according to a first embodiment of the present invention.
As shown in Figure 3, the method comprises following step S302 to step S308:
Step S302, obtains the Guan Wen of heat exchanger tube outside an air conditioning chamber every Preset Time.
Wherein, obtain the first pipe temperature of heat exchanger tube outside air conditioning chamber in the first moment, obtain the second pipe temperature of heat exchanger tube outside air conditioning chamber in the second moment, interval Preset Time between the first moment and the second moment.In addition, the Guan Wen of heat exchanger tube outside an air conditioning chamber is obtained every Preset Time, namely, a sequence about Guan Wen can be got, and each in this sequence represents the Guan Wen of particular moment, in this sequence any two adjacent pipe temperature correspondences moment between interlude length equal Preset Time.It should be noted that, in this pipe temperature sequence, pipe temperature item number is wherein at least 2.
Such as, Preset Time can be represented with t respectively, T
n-1represent the first pipe temperature, T
nrepresent the second pipe temperature, T represent pipe temperature sequence T1, T2 ... T
n-1, T
n..., wherein, 1,2 ... n-1, n ... represent the sequence number in the moment that pipe temperature is corresponding respectively.It should be noted that, t can be 1min.
In embodiments of the present invention, can be detected by controller Perceived control thermometer bulb and obtain the Guan Wen of heat exchanger tube outside air conditioning chamber.In addition, after the Guan Wen at every turn getting the outer heat exchanger tube of air-conditioning, the Guan Wen that this gets can be stored.It should be noted that, because air-conditioning only just needs to carry out defrosting control, therefore in the present invention, under this air-conditioning defrosting control method is applied in the heating operation mode of air-conditioning under heating operation mode.
Step S304, calculates the temperature difference of the first pipe temperature and original tube temperature, obtains the first pipe temperature difference, calculates the temperature difference of the second pipe temperature and original tube temperature, obtains the second pipe temperature difference.
Wherein, original tube temperature is the Guan Wen of heat exchanger tube outside the air conditioning chamber that obtained before the first moment.It should be noted that, original tube temperature can be the Guan Wen of compressor when just opening of air-conditioner, and it also can be the Guan Wen of compressor after unlatching a period of time of air-conditioner.It should be noted that, if due to air-condition heat exchanger frosting, then outside air conditioning chamber heat exchanger tube constant temperature decline, therefore, preferably, the temperature difference of the first pipe temperature and original tube temperature can be the difference that original tube temperature deducts the first pipe temperature herein.In like manner, the temperature difference of the second pipe temperature and original tube temperature can be the difference that original tube temperature deducts the second pipe temperature.Wherein, this original tube temperature can be designated as T0, according to aforesaid T
n-1and T
ncan represent the gentle second pipe temperature of the first pipe respectively, then the first pipe temperature difference can be (T0-T
n-1), the second pipe temperature difference can be (T0-T
n).T
n-1and T
nthe Guan Wen representated by any two adjacencies in pipe temperature sequence can be represented.
It should be noted that, can time period of growing arbitrarily of interval between the moment of the moment that original tube temperature is corresponding and the first pipe temperature correspondence, and during Section 1 in the first pipe Wen Weiguan temperature sequence, moment corresponding to the first pipe temperature can and moment corresponding to original tube temperature between the above-mentioned Preset Time in interval.
Step S306, judges whether the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned.
It should be noted that, this is pre-conditioned can be a temperature range, and such as, this temperature range can be [△ T ,+∞], or it can be [△ T1, △ T2], and wherein, △ T can equal △ T1.Judge whether the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned, that is, judge whether the first pipe temperature difference and the second pipe temperature difference meet pre-conditioned simultaneously.Such as, the first pipe temperature difference can be judged whether within said temperature scope, and judge the second pipe temperature difference simultaneously whether within said temperature scope.Wherein, when judging that the first pipe temperature difference is within said temperature scope, and judge that the second pipe temperature difference is within the scope of said temperature simultaneously, then judge that the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned.Otherwise, when judging to only have any one Guan Wen within said temperature scope in the first pipe temperature difference and the second pipe temperature difference, or judge that these two pipe temperature difference are not all within the scope of said temperature, then judge that the first pipe temperature difference and the second pipe temperature difference not all meet pre-conditioned.
Step S308, if judge that the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned, then controls air-conditioning and performs defrost.
It should be noted that, if judge that the first pipe temperature difference and the second pipe temperature difference not all meet pre-conditioned, then control air-conditioning and continue to run heating mode, and circulation performs the step before step S308 successively.
Only control air-conditioning when the difference of a judgement Guan Wenyu original tube temperature meets pre-conditioned and perform defrost, may exist due to temperature instability and judge that the difference of this Guan Wenyu original tube temperature meets pre-conditioned, thus causing air-conditioning defrost by mistake.And pass through the embodiment of the present invention, because needs two pipe temperature difference meet above-mentioned pre-conditioned simultaneously, and when these two pipe temperature difference are difference respectively with original tube temperature of adjacent two pipe temperature, just control air-conditioning and perform defrost, therefore the shortcoming that air-conditioning misses defrost can be overcome, thus the heating effect of air-conditioning can be improved, and improve the comfort level of user.The embodiment of the present invention judges whether to enter defrost by the reduction rate of change of detector tube temperature.Because air-condition heat exchanger is once frosting, refrigerant and air heat-exchange will weaken, and pipe temperature will reduce, and when the frost layer on heat exchanger tube reaches certain thickness, in certain hour section, pipe temperature will drop-out value to certain numerical value.And if this numerical value is more than or equal to certain temperature value (as △ T) in continuous two cycles, then judge that air-conditioning has reached defrost condition.By the embodiment of the present invention, defrost can be entered in time when air-conditioning frosting, solve the heat exchanger frosting very thick problem also not entering defrost, also can solve the problem that air-conditioning under low temperature and low humidity environment enters defrost by mistake.
Fig. 4 is the flow chart of air-conditioning defrosting control method according to a second embodiment of the present invention.
As shown in Figure 4, this air-conditioning defrosting control method comprises following step S402 to step S412, and this embodiment can as preferred embodiment embodiment illustrated in fig. 3.
Step S402 to step S408, respectively with step S302 embodiment illustrated in fig. 3 to step S308, do not repeat them here.
Step S410, after judging a period of time of air-conditioner continuous execution defrost, outside air conditioning chamber, whether the Guan Wen of heat exchanger tube is more than or equal to the first preset value.
Particularly, after control air-conditioning performs defrost, after judging a period of time of air-conditioner continuous execution defrost, outside air conditioning chamber, whether the Guan Wen of heat exchanger tube is more than or equal to the first preset value.Wherein, the first preset value can exit the Guan Wen of defrost for air-conditioning, and the Guan Wenke that this air-conditioning exits defrost thinks 12 DEG C.In addition, air-conditioner continuous performs the length of a period of time of defrost herein can be 60s.
Step S412, if judge air-conditioner continuous perform a period of time of defrost after the Guan Wen of the outer heat exchanger tube in air conditioning chamber be more than or equal to the first preset value, then control air-conditioning exits defrost.
It should be noted that, if judge air-conditioner continuous perform a period of time of defrost after the Guan Wen of the outer heat exchanger tube in air conditioning chamber be less than the first preset value, then control air-conditioning continuation defrost.
Because heating effect during air-conditioning execution defrosting operation is poor, and the comfort level of user is also poor, therefore, pass through the embodiment of the present invention, can prevent the frost layer on heat exchanger tube from having changed to the greatest extent, but air-conditioning is also at execution defrosting operation, thus air-conditioning can be controlled exits defrost in time, and then the heating effect of air-conditioning can be improved, and improve the comfort level of user.
Preferably, in the above embodiment of the present invention, original tube temperature can be obtained in such a way:
First, can judge whether the running time of compressor reaches the second preset value.Wherein, this compressor is the compressor of air-conditioning.Such as, can judge whether the running time of compressor reaches 60min.Then, if judge that the running time of compressor reaches the second preset value, then the 3rd pipe temperature of heat exchanger tube outside air conditioning chamber is obtained.In addition, if judge that the running time of compressor does not reach the second preset value, then control air-conditioning and continue heating operation, and before not reaching the second preset value, do not obtain any Guan Wen of heat exchanger tube outside air conditioning chamber.Then, using the 3rd pipe temperature as original tube temperature.
Due to compressor just open time, system cloud gray model is unstable, pipe temperature can be caused often to change, thus cause the frequent defrost of air-conditioning.Pass through the embodiment of the present invention, after compressor start, after reaching the second preset value (as 60min) to compressor accumulated running time, the controller of air-conditioning just starts to obtain original tube temperature, like this, can avoid due to compressor just open time, the change of pipe temperature and the misoperation of frequent defrost that causes.In addition, reach the time interval not detecting defrost condition that the time period (as 60min) the second preset value is set as by from after compressor start to compressor accumulated running time, ensure that the continuation of air-conditioning heating effect.
Preferably, in the above embodiment of the present invention, judge whether the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned can comprising: judge whether the first pipe temperature difference and the second pipe temperature difference are all more than or equal to the default pipe temperature difference.Like this, accordingly, if judge that the first pipe temperature difference and the second pipe temperature difference all meet pre-conditioned, then controlling air-conditioning execution defrost can comprise: if judge that the first pipe temperature difference and the second pipe temperature difference are all more than or equal to the default pipe temperature difference, then control air-conditioning and perform defrost.Wherein, if judge that the first pipe temperature difference and the second pipe temperature difference are not all more than or equal to the default pipe temperature difference, then do not control air-conditioning and perform defrost, and continue circulation and perform " obtaining the Guan Wen of heat exchanger tube outside an air conditioning chamber every Preset Time ", " calculate the temperature difference of the first pipe temperature and original tube temperature, obtain the first pipe temperature difference, calculate the temperature difference of the second pipe temperature and original tube temperature, obtain the second pipe temperature difference ", " judge whether the first pipe temperature difference and the second pipe temperature difference are all more than or equal to the default pipe temperature difference ", if " judge that the first pipe temperature difference and the second pipe temperature difference are all more than or equal to the default pipe temperature difference, then control air-conditioning perform defrost " step.Preferably, preset the pipe temperature difference and can be 5 DEG C.
Such as, the first pipe temperature difference can be (T0-T1), and the second pipe temperature difference can be (T0-T2), presetting the pipe temperature difference can be △ T, wherein, (T0-T1)≤△ T and (during T0-T2)≤△ T, then control air-conditioning perform defrost; Otherwise meet following condition for the moment: 1) (T0-T1)≤△ T and (T0-T2) < △ T time; 2) (T0-T1) < △ T and (during T0-T2)≤△ T; 3) (T0-T1) < △ T and (T0-T2) < △ T time, then do not control air-conditioning and perform defrost, but control air-conditioning continuation operation heating mode, and whether this air-conditioning of continuation detection meets defrost condition.Such as, first the pipe temperature T3 of heat exchanger tube outside air conditioning chamber can be obtained every aforementioned Preset Time, calculate the pipe temperature difference (T0-T3) of T3 and T0 again, then judge whether to meet (T0-T2)≤△ T and (T0-T3)≤△ T, wherein, if judge (T0-T2)≤△ T and (T0-T3)≤△ T, then control air-conditioning perform defrost, otherwise do not control air-conditioning perform defrost.
It should be noted that, the relation not controlling (T0-T2) and △ T when air-conditioning performs defrost and (T0-T3) and △ T with do not control the relation object of (T0-T1) and △ T and (T0-T2) and △ T when air-conditioning performs defrost seemingly, do not repeat them here.
Preferably, in the above embodiment of the present invention, judge the first pipe temperature difference and the second pipe temperature difference whether all meet pre-conditioned after, this air-conditioning defrosting control method can also comprise:
First, if judge that the first pipe temperature difference and the second pipe temperature difference not all meet pre-conditioned, then judge whether environment temperature meets preset range and whether reach the 3rd preset value the running time of compressor.Wherein, the temperature of the surrounding environment of environment temperature residing for air-conditioning.Then, if judge that environment temperature meets preset range and reaches the 3rd preset value the running time of compressor, then control air-conditioning and perform defrost.It should be noted that, enforcing defrost for controlling air-conditioning herein.
Such as, when the first pipe temperature difference and the second pipe temperature difference not all meet pre-conditioned, can judge whether environment temperature is more than or equal to-10 DEG C and is less than or equal to 2 DEG C, whether reach 180min the running time of compressor simultaneously, if judge that environment temperature is more than or equal to-10 DEG C and is less than or equal to 2 DEG C, reach 180min the running time of compressor simultaneously, then can control air-conditioning and enforce defrost, otherwise do not control air-conditioning compulsory execution defrost.
Like this, by the embodiment of the present invention, air-conditioning can be controlled and perform defrost in time, thus the heating effect of air-conditioning and the comfort level of user's using air-condition can be ensured.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an air-conditioning defrosting control method, is characterized in that, comprising:
The Guan Wen of heat exchanger tube outside an air conditioning chamber is obtained every Preset Time, wherein, the first pipe temperature of heat exchanger tube outside described air conditioning chamber is obtained in the first moment, the second pipe temperature of heat exchanger tube outside described air conditioning chamber is obtained, Preset Time described in interval between described first moment and described second moment in the second moment;
Calculate the temperature difference of described first pipe temperature and original tube temperature, obtain the first pipe temperature difference, calculate the temperature difference of described second pipe temperature and described original tube temperature, obtain the second pipe temperature difference, wherein, described original tube temperature is the Guan Wen of heat exchanger tube outside the described air conditioning chamber that obtained before described first moment;
Judge whether the described first pipe temperature difference and the described second pipe temperature difference all meet pre-conditioned; And
If judge that the described first pipe temperature difference and the described second pipe temperature difference all meet described pre-conditioned, then control described air-conditioning and perform defrost.
2. air-conditioning defrosting control method according to claim 1, is characterized in that, after the described air-conditioning of control performs defrost, described air-conditioning defrosting control method also comprises:
After judging a period of time of described air-conditioner continuous execution defrost, outside described air conditioning chamber, whether the Guan Wen of heat exchanger tube is more than or equal to the first preset value; And
If the Guan Wen of heat exchanger tube is more than or equal to described first preset value outside described air conditioning chamber after judging a period of time of described air-conditioner continuous execution defrost, then controls described air-conditioning and exit defrost.
3. air-conditioning defrosting control method according to claim 1, is characterized in that, obtains described original tube temperature in such a way:
Judge whether the running time of compressor reaches the second preset value;
If judge to reach described second preset value the running time of described compressor, then obtain the 3rd pipe temperature of heat exchanger tube outside described air conditioning chamber; And
Using described 3rd pipe temperature as described original tube temperature.
4. air-conditioning defrosting control method according to claim 1, is characterized in that,
Judge whether the described first pipe temperature difference and the described second pipe temperature difference all meet pre-conditioned comprising: judge whether the described first pipe temperature difference and the described second pipe temperature difference are all more than or equal to the default pipe temperature difference,
If judge that the described first pipe temperature difference and the described second pipe temperature difference all meet described pre-conditioned, then control described air-conditioning execution defrost to comprise: if judge that the described first pipe temperature difference and the described second pipe temperature difference are all more than or equal to the described default pipe temperature difference, then control described air-conditioning and perform defrost.
5. air-conditioning defrosting control method according to claim 1, is characterized in that, judge the described first pipe temperature difference and the described second pipe temperature difference whether all meet described pre-conditioned after, described air-conditioning defrosting control method also comprises:
If judge that the described first pipe temperature difference and the described second pipe temperature difference not all meet described pre-conditioned, then judge whether environment temperature meets preset range and whether reach the 3rd preset value the running time of compressor; And
If judge that described environment temperature meets described preset range and reaches described 3rd preset value the running time of described compressor, then control described air-conditioning and perform defrost.
6. an air-conditioning defrosting control device, is characterized in that, comprising:
First acquiring unit, for obtaining the Guan Wen of heat exchanger tube outside an air conditioning chamber every Preset Time, wherein, the first pipe temperature of heat exchanger tube outside described air conditioning chamber is obtained in the first moment, the second pipe temperature of heat exchanger tube outside described air conditioning chamber is obtained, Preset Time described in interval between described first moment and described second moment in the second moment;
Computing unit, for calculating the temperature difference of described first pipe temperature and original tube temperature, obtain the first pipe temperature difference, calculate the temperature difference of described second pipe temperature and described original tube temperature, obtain the second pipe temperature difference, wherein, described original tube temperature is the Guan Wen of heat exchanger tube outside the described air conditioning chamber that obtained before described first moment;
First judging unit, for judging whether the described first pipe temperature difference and the described second pipe temperature difference all meet pre-conditioned; And
First control unit, for judge the described first pipe temperature difference and the described second pipe temperature difference all meet described pre-conditioned time, control described air-conditioning perform defrost.
7. air-conditioning defrosting control device according to claim 6, is characterized in that, also comprise:
Second judging unit, after performing defrost at the described air-conditioning of control, after judging a period of time of described air-conditioner continuous execution defrost, outside described air conditioning chamber, whether the Guan Wen of heat exchanger tube is more than or equal to the first preset value; And
Second control unit, for when the Guan Wen of heat exchanger tube is more than or equal to described first preset value outside described air conditioning chamber after a period of time judging described air-conditioner continuous execution defrost, controls described air-conditioning and exits defrost.
8. air-conditioning defrosting control device according to claim 6, is characterized in that, also comprise: second acquisition unit, and described second acquisition unit is for obtaining described original tube temperature, and described second acquisition unit comprises:
Judge module, for judging whether the running time of compressor reaches the second preset value;
Acquisition module, for when judging that the running time of described compressor reaches described second preset value, obtains the 3rd pipe temperature of heat exchanger tube outside described air conditioning chamber, and using described 3rd pipe temperature as described original tube temperature.
9. air-conditioning defrosting control device according to claim 6, is characterized in that,
Described first judging unit also for judging whether the described first pipe temperature difference and the described second pipe temperature difference are all more than or equal to the default pipe temperature difference,
Described first control unit, also for when judging the described first pipe temperature difference and the described second pipe temperature difference is all more than or equal to the described default pipe temperature difference, controlling described air-conditioning and performing defrost.
10. air-conditioning defrosting control device according to claim 6, is characterized in that, also comprise:
3rd judging unit, for judge the described first pipe temperature difference and the described second pipe temperature difference whether all meet described pre-conditioned after, when judge the described first pipe temperature difference and the described second pipe temperature difference not all meet described pre-conditioned time, judge whether environment temperature meets preset range and whether reach the 3rd preset value the running time of compressor; And
Described first control unit, also for when judging that described environment temperature meets described preset range and the running time of described compressor reaches described 3rd preset value, controlling described air-conditioning and performing defrost.
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| CN112283880A (en) * | 2020-09-17 | 2021-01-29 | 珠海格力电器股份有限公司 | Control system and control method for preventing air conditioner from freezing |
| CN113154654A (en) * | 2021-01-28 | 2021-07-23 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device, storage medium and air conditioner |
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