CN104019593B - The Defrost method of air-conditioning - Google Patents
The Defrost method of air-conditioning Download PDFInfo
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- CN104019593B CN104019593B CN201310065003.9A CN201310065003A CN104019593B CN 104019593 B CN104019593 B CN 104019593B CN 201310065003 A CN201310065003 A CN 201310065003A CN 104019593 B CN104019593 B CN 104019593B
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Abstract
The invention discloses the Defrost method of a kind of air-conditioning, including: S1: compressor enters heating mode.S2: detecting that outdoor fan interval is closed, whether detection compressor accumulated running time t reaches the first scheduled time t1.S3: when t is be more than or equal to t1, enter the defrost stage.S4: detect that outdoor fan runs, whether t is more than the second scheduled time t2 in detection, by the difference △ T=T2-T1 and predetermined threshold △ T of the temperature T2 of indoor heat exchanger Yu indoor environment temperature T1NewlyCompare.S5: when t is more than t2 and less than the 3rd scheduled time t3, it is judged that whether △ T is less than △ TNewly.S6: when in step S5 when being judged as YES, enter the defrost stage.S7: when t is more than t3, it is judged that whether △ T is less than △ TNewly+ 2 DEG C.S8: when in step S7 when being judged as YES, enter the defrost stage.S9: defrost terminates.Defrost method according to the present invention, it may be achieved have frost defrosting, frostless exit.
Description
Technical field
The present invention relates to living electric apparatus field, especially relate to the Defrost method of a kind of air-conditioning.
Background technology
The defrosting of current air-conditioner is the control method adopting outdoor heat exchanger temperature sensor or indoor temperature transmitter and timing defrost to combine, both the above defrost mode or relatively costly, or the problem of the clean or frostless defrost of frostization occurs, affects heating effect.
Summary of the invention
It is contemplated that at least solve one of technical problem of existence in prior art.For this, it is an object of the present invention to propose a kind of realize frost defrosting, the frostless air-conditioning exited Defrost method.
The Defrost method of air-conditioning according to embodiments of the present invention, described air-conditioning includes compressor, indoor fan, indoor heat exchanger, outdoor fan and cross valve, comprise the steps: S1: described compressor enters heating mode, and detect the operation time t of described compressor, detect whether described outdoor fan closes simultaneously；S2: when detecting in step S1 that described outdoor fan interval is closed, detects when the closedown of described outdoor fan and described compressor operating, and whether the accumulated running time t of described compressor reaches the first scheduled time t1；S3: when accumulated running time t being detected be more than or equal to the first scheduled time t1, described air-conditioning enters into the defrost stage, when accumulated running time t being detected less than the first scheduled time t1, then returns to step S2；S4: when described outdoor fan continuous service being detected in step S1, then detect the operation time t of described compressor whether more than the second scheduled time t2, and the difference △ T=T2-T1 and predetermined threshold △ T of the temperature T2 and indoor environment temperature T1 of described indoor heat exchanger that will detect in the process of described compressor operatingNewlyCompare；S5: when detecting in step S4 that the operation time t of described compressor is more than the second scheduled time t2 and less than the 3rd scheduled time t3, it is judged that whether the △ T detected is less than predetermined threshold △ TNewly；S6: when in step S5 when being judged as YES, described air-conditioning enters the defrost stage, and when when being judged as NO of step S5, then whether the △ T continuing to judge to detect less than △ TNewly；S7: when detecting in step S4 that the operation time t of described compressor is more than the 3rd scheduled time t3, it is judged that whether the △ T detected is less than △ TNewly+ 2 DEG C；S8: when in step S7 when being judged as YES, described air-conditioning enters the defrost stage, when in step S7 when being judged as NO, then continue to judge that whether the △ T that detects is less than △ TNewly+ 2 DEG C；S9: in the described defrost stage, the defrost time DT when described operation of air conditionerAlwaysOr when defrost end signal being detected, defrost terminates, and returns to step S1, so circulates.
The Defrost method of air-conditioning according to embodiments of the present invention, enter the defrost stage by state modulator air-conditionings such as the operation time t of indoor environment temperature T1, indoor heat exchanger temperature T2 and compressor and exit the defrost stage, thus realizing having frost defrosting, the frostless purpose exited, improve the heating effect of air-conditioning.
It addition, the Defrost method according to the air-conditioning of the present invention also has following additional technical feature:
In some embodiments of the invention, step S4 also includes: S41: in the process of described compressor operating, when the difference △ T detected is less than △ TNewlyTime, whether detect the operation time t of described compressor more than described second scheduled time t2；S42: < during t2, then continuing detection when the operation time t of described compressor is equal to described second scheduled time t2, whether difference △ T is still less than △ T as tNewly；S43: when in step S42 when being judged as YES, then set defrost time DTAlwaysIt is the 4th scheduled time t4.Thus the defrosting effect of air-conditioning can be ensured.
Specifically, described 4th scheduled time t4 is ten minutes.
According to some embodiments of the present invention, the △ T in step S4-S8NewlyBy △ TWind speed, indoor environment temperature T1 and defrost temperature difference correction factor △ T2 note draw: 1) calculate △ T2:a) when T1 >=18 DEG C, Δ T2=0；B) as 0≤T1 < 18 DEG C, Δ T2=(20-T1)/8, directly adopting the shift division of single-chip microcomputer, result only has integer part；C) as T1 < 0, Δ T2=2；2) calculate
△TNewly: △ TNewly=△TWind speed-Δ T2；Wherein △ TWind speedFor the defrost parameter value that the wind speed according to described indoor fan sets.Thus can be further ensured that air-conditioning can realize frost defrosting, the frostless purpose exited.
Further, the Defrost method of described air-conditioning also comprises the steps: S10: when described compressor operating being detected in step S4 to described second scheduled time t2, and whether the wind speed detecting described indoor fan is mild wind；Whether S11: when detecting that described wind speed is mild wind, enter into the defrost stage, when detecting that described wind speed is not for mild wind, detect the operation time t of described compressor more than described 3rd scheduled time t3；S12: when detecting that the operation time t of described compressor is more than the second scheduled time t2 and less than the 3rd scheduled time t3, and judge that the △ T detected is less than predetermined threshold △ TNewlyTime, described air-conditioning enters the defrost stage；When detecting that the operation time t of described compressor is more than the 3rd scheduled time t3, and judge that the △ T detected is less than △ TNewlyWhen+2 DEG C, described air-conditioning enters the defrost stage.
Specifically, described defrost end signal is detect that continuous 5th scheduled time t5 of electric current of described compressor meets or exceeds defrost and exits current parameters.
Preferably, described 5th scheduled time t5 is 7 seconds.
According to some embodiments of the present invention, at described defrost time DTAlwaysIn, described compressor the 6th scheduled time △ t1 first out of service, then described compressor starts is run；First described outdoor fan and described cross valve run the 7th scheduled time △ t3, and then described outdoor fan and described cross valve are out of service；First described indoor fan runs the 8th scheduled time △ t2, and then described indoor fan is out of service.Thus defrosting effect and the heating effect of air-conditioning can be ensured.
Further, in step s 9, described air-conditioning has the defrost tenth skill of the 9th scheduled time △ t4 after defrost terminates, in described 9th scheduled time △ t4, described compressor and described indoor fan are out of service, bringing into operation after described cross valve the tenth scheduled time △ t5 out of service, described outdoor fan runs.Thus defrosting effect and the heating effect of air-conditioning can be ensured.
The additional aspect of the present invention and advantage will part provide in the following description, and part will become apparent from the description below, or is recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 is the flow chart of the Defrost method of air-conditioning according to embodiments of the present invention；
Fig. 2 is the flow chart of the Defrost method of air-conditioning according to an embodiment of the invention；
Fig. 3 is compressor according to embodiments of the present invention, cross valve, outdoor fan and the indoor fan running status schematic diagram during defrost stage and defrost tenth skill；
Fig. 4 is compressor, cross valve, outdoor fan and the indoor fan running status schematic diagram during defrost stage and defrost tenth skill according to an embodiment of the invention.
Detailed description of the invention
Being 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 the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, and is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or hint relative importance.
In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or connect integratedly；Can be mechanically connected, it is also possible to be electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the connection of two element internals.For the ordinary skill in the art, it is possible to concrete condition understands above-mentioned term concrete meaning in the present invention.
The Defrost method of a kind of air-conditioning according to embodiments of the present invention is described below with reference to Fig. 1-Fig. 4, this air-conditioning includes compressor, indoor fan, indoor heat exchanger, outdoor fan and cross valve, wherein the structure and working principle of air-conditioning etc. are known by those skilled in the art, are just not described in detail here.
The Defrost method of air-conditioning according to embodiments of the present invention, comprises the steps:
S1: compressor enters heating mode and the operation time t of detection compressor, and whether detection outdoor fan closes simultaneously.
S2: when detecting in step S1 that outdoor fan interval is closed, exogenous wind office of sensing chamber closes and during compressor operating, and whether the accumulated running time t of compressor reaches the first scheduled time t1.
S3: when accumulated running time t being detected be more than or equal to the first scheduled time t1, air-conditioning enters into the defrost stage, when accumulated running time t being detected less than the first scheduled time t1, then returns to step S2.
S4: when outdoor fan continuous service being detected in step S1, then detect the operation time t of compressor whether more than the second scheduled time t2, and the difference △ T=T2-T1 and predetermined threshold △ T of the temperature T2 and indoor environment temperature T1 of indoor heat exchanger that will detect in the process of compressor operatingNewlyCompare.
S5: when detecting in step S4 that the operation time t of compressor is more than the second scheduled time t2 and less than the 3rd scheduled time t3, it is judged that whether the △ T detected is less than predetermined threshold △ TNewly。
S6: when in step S5 when being judged as YES, air-conditioning enters the defrost stage, and when when being judged as NO of step S5, then whether the △ T continuing to judge to detect less than △ TNewly。
S7: when detecting in step S4 that the operation time t of compressor is more than the 3rd scheduled time t3, it is judged that whether the △ T detected is less than △ TNewly+2℃。
S8: when in step S7 when being judged as YES, air-conditioning enters the defrost stage, when in step S7 when being judged as NO, then continue to judge that whether the △ T that detects is less than △ TNewly+2℃。
S9: in the defrost stage, the defrost time DT when operation of air conditionerAlwaysOr when defrost end signal being detected, defrost terminates, and returns to step S1, so circulates.Specifically, defrost end signal is detect that continuous 5th scheduled time t5 of electric current of compressor meets or exceeds defrost and exits current parameters, wherein sets different defrosts according to different refrigeration systems and exits current parameters.Further, the 5th scheduled time t5 is 7 seconds.
Wherein, the first scheduled time t1, the second scheduled time t2 and the three scheduled time t3 can set according to the performance of compressor and practical operation situation, predetermined threshold △ TNewlyCalculated by the different wind speed of indoor fan and indoor environment temperature T1, defrost time DTAlwaysCan calculate according to defrost time parameter DT1, wherein formulate different defrost time parameter DT1 according to different refrigeration systems.
Specifically, first compressor enters heating mode, namely compressor starts is run to manufacture heat, in the process of compressor operating, the operation time t of detection compressor, whether detection outdoor fan closes simultaneously, now it is divided into two kinds of situations: the first situation is to detect that outdoor fan interval is closed, outdoor fan can be closed because of indoor heat exchanger high temperature protection, now whether the detection compressor accumulated running time t when outdoor fan is closed reaches the first scheduled time t1, specifically, if air-conditioning does not have defrost action before, the operation time t of accumulating compression machine when then the high temperature protection of heat exchanger starts indoor, if air-conditioning carried out defrost action before, then from the last defrost terminate time accumulating compression machine operation time t.When accumulated running time t compressor being detected reaches the first scheduled time t1, air-conditioning enters into the defrost stage.When detecting that the accumulated running time t of compressor is less than the first scheduled time t1, then continuing detection until the accumulated running time t of compressor stops detection after reaching the first scheduled time t1, air-conditioning enters into the defrost stage.
The second situation is, detect that outdoor fan is in continuously running duty, whether now detect the operation time t of compressor more than the second scheduled time t2, in the process of compressor operating, detect the temperature T2 and detection indoor environment temperature T1 of indoor heat exchanger simultaneously, and by the difference △ T=T2-T1 and predetermined threshold △ T of the temperature T2 of indoor heat exchanger Yu indoor environment temperature T1NewlyCompare, now can be divided into again two sub cases.
The first subcase be operation time t compressor being detected more than the second scheduled time t2 and less than the 3rd scheduled time t3 time, it is judged that whether the △ T detected less than predetermined threshold △ TNewly, when △ T is less than predetermined threshold △ TNewlyTime, then air-conditioning enters into the defrost stage, when △ T is more than predetermined threshold △ TNewlyTime, then continue detection until △ T is less than predetermined threshold △ TNewlyIn time, stops detecting, and air-conditioning enters into the defrost stage.
Second seed situation be operation time t compressor being detected more than the 3rd scheduled time t3 time, then judge that whether the △ T detected is less than △ TNewly+ 2 DEG C, when the △ T detected is less than △ TNewlyWhen+2 DEG C, air-conditioning enters into the defrost stage, when the △ T detected is more than △ TNewlyWhen+2 DEG C, then continue detection until △ T is less than △ TNewlyStopping detection when+2 DEG C, now air-conditioning enters into the defrost stage.
When air-conditioning was in the defrost stage, the defrost time DT when operation of air conditionerAlwaysOr when defrost end signal being detected, defrost terminates, now air-conditioning detects the operation time t of compressor again, and detects whether outdoor fan closes.
The Defrost method of air-conditioning according to embodiments of the present invention, enter the defrost stage by state modulator air-conditionings such as the operation time t of indoor environment temperature T1, indoor heat exchanger temperature T2 and compressor and exit the defrost stage, thus realizing having frost defrosting, the frostless purpose exited, improve the heating effect of air-conditioning.
Further, step S4 also includes:
S41: in the process of compressor operating, when the difference △ T detected is less than △ TNewlyTime, whether the operation time t of detection compressor is more than the second scheduled time t2.
S42: < during t2, then continuing detection when the operation time t of compressor is equal to the second scheduled time t2, whether difference △ T is still less than △ T as tNewly。
S43: when in step S42 when being judged as YES, then set defrost time DTAlwaysIt is the 4th scheduled time t4.Specifically, the 4th scheduled time t4 is ten minutes.
In other words, in the process of compressor operating, when t is not up to the second scheduled time t2 between when the compressor is operating, have detected that difference △ T is less than △ TNewly, and when compressor operating time t is the second scheduled time t2, difference △ T is still less than △ TNewly, now think that air-conditioning frosting is serious, the defrost time DT of air-conditioningAlwaysIt is forced to 10 minutes defrost effects to ensure air-conditioning.
In some embodiments of the invention, the △ T in step S4-S8NewlyBy △ TWind speed, indoor environment temperature T1 and defrost temperature difference correction factor △ T2 note draw:
1) △ T2 is calculated:
A) when T1 >=18 DEG C, Δ T2=0.
B) as 0≤T1 < 18 DEG C, Δ T2=(20-T1)/8, directly adopting the shift division of single-chip microcomputer, result only has integer part, and wherein, the shift division of single-chip microcomputer known by those skilled in the art, is just not described in detail here.
C) as T1 < 0, Δ T2=2.
2) △ T is calculatedNewly:
△TNewly=△TWind speed-Δ T2, wherein △ TWind speedFor the defrost parameter value that the wind speed according to indoor fan sets.
Specifically, △ TNewlyDifferent values is had, the △ T that indoor air velocity is corresponding when being powerful wind, Gao Feng, apoplexy, low wind relative to different wind speed and the different indoor air velocities of indoor fanNewlyRespectively △ TNew strong、△TNew peak、△TIn new、△TNew low point.Meanwhile, the △ T that indoor air velocity is corresponding when being powerful wind, Gao Feng, apoplexy, low windWind speedRespectively △ TBy force、△THigh、△TIn、△TLow, now △ TNew strong=△TBy force-ΔT2、△TNew peak=△THigh-ΔT2、△TIn new=△TIn-ΔT2、△TNew low point=△TLow-Δ T2.Thereby through adopting the defrost parameter value △ T set according to different wind speedWind speed△ T is calculated with indoor environment temperature T1NewlyMode, can be further ensured that air-conditioning can realize frost defrosting, the frostless purpose exited.
Specifically, defrost time DTAlwaysAccording to the form below is calculated:
Wherein, the time, ta, tb, tc, td, te were for specifically to set according to practical situation, and DT1 is defrost time parameter, set different defrost time parameter DT1 according to different refrigeration systems.Further, when air-conditioning enters into the defrost stage according to a kind of situation in situation 1-5 continuous three times, then the time DT of the 4th defrostAlwaysIt is set as DT1+5 minute.
Further, the Defrost method of air-conditioning also comprises the steps:
S10: when compressor operating being detected in step S4 to the second scheduled time t2, whether the wind speed of sensing chamber's inner blower is mild wind.
Whether S11: when detecting that wind speed is mild wind, enter into the defrost stage, when detecting that wind speed is not for mild wind, detect the operation time t of described compressor more than described 3rd scheduled time t3.
S12: when detecting that the operation time t of compressor is more than the second scheduled time t2 and less than the 3rd scheduled time t3, and judge that the △ T detected is less than predetermined threshold △ TNewlyTime, air-conditioning enters the defrost stage；When detecting that the operation time t of compressor is more than the 3rd scheduled time t3, and judge that the △ T detected is less than △ TNewlyWhen+2 DEG C, air-conditioning enters into the defrost stage.
Specifically, at defrost time DTAlwaysIn, compressor the 6th scheduled time △ t1 first out of service, then compressor starts is run.First outdoor fan and cross valve run the 7th scheduled time △ t3, and then outdoor fan and cross valve are out of service.First indoor fan runs the 8th scheduled time △ t2, and then indoor fan is out of service.Wherein, the 7th scheduled time △ t3 is less than the 6th scheduled time △ t1, and the 8th scheduled time △ t2 is less than the 7th scheduled time △ t3.6th scheduled time △ t1, the 7th t3 and the eight scheduled time △, t2 scheduled time △ specifically can set according to practical situation.Thus ensure that the defrosting effect of air-conditioning and heating effect.
Further, in step s 9, air-conditioning has the defrost tenth skill of the 9th scheduled time △ t4 after defrost terminates, in the 9th scheduled time △ t4, compressor and indoor fan are out of service, bring into operation after cross valve the tenth scheduled time △ t5 out of service, and outdoor fan runs.Wherein, the 9th scheduled time △ t4 is more than the tenth scheduled time △ t5, and the 9th t4 and the ten scheduled time △, t5 scheduled time △ specifically can set according to practical situation, to ensure defrosting effect and the heating effect of air-conditioning.
The Defrost method of air-conditioning according to the preferred embodiment of the invention is described below with reference to Fig. 2 and Fig. 3.
First, compressor enters heating mode, and namely compressor starts is run, simultaneously in the process of compressor operating, and the operation time t of detection compressor, and detect whether outdoor fan closes because of the high temperature protection of indoor heat exchanger, now it is divided into two kinds of situations:
The first situation is, detect that outdoor fan is intermittently closed because of the high temperature protection of indoor heat exchanger, then detect whether the operation time t that compressor is accumulative when outdoor inner blower is closed reaches the first scheduled time t1, if there is no defrost action between now, the operation time t of accumulating compression machine when then heat exchanger high temperature protection starts indoor, if carried out defrost action before, then from the last defrost terminate time accumulating compression machine operation time t, when the operation time t that compressor is accumulative reaches the first scheduled time t1, then air-conditioning enters into the defrost stage, when the accumulative operation time t of compressor is not up to the first scheduled time t1, then continue detection until after the accumulated running time t of compressor reaches the first scheduled time t1, air-conditioning enters into the defrost stage.
The second situation is, detect that outdoor fan is in continuously running duty, now detect the operation time t of compressor and whether reach the second scheduled time t2, and the difference △ T=T2-T1 and predetermined threshold △ T of the temperature T2 and indoor environment temperature T1 of indoor heat exchanger that will detect in the running of compressorNewlyCompare, wherein predetermined threshold △ TNewlyIt is by △ TWind speedCalculating with indoor environment temperature T1, concrete computing formula is as described above, does not just apply here and states.Now can be divided into four sub cases:
The first subcase be operation time t compressor being detected more than the second scheduled time t2 and less than the 3rd scheduled time t3, now by difference △ T and predetermined threshold △ TNewlyCompare, when △ T is less than predetermined threshold △ TNewlyTime, air-conditioning enters into the defrost stage, when △ T is more than predetermined threshold △ TNewlyTime, then continue to compare △ T and △ TNewly, until △ T is less than predetermined threshold △ TNewlyTime, stop comparing, now air-conditioning enters into the defrost stage.
Second seed situation be operation time t compressor being detected more than the 3rd scheduled time t3, now judge that whether the △ T detected is less than △ TNewly+ 2 DEG C, when △ T is less than △ TNewlyWhen+2 DEG C, then air-conditioning enters into the defrost stage, when △ T is more than △ TNewly+ 2 DEG C, then continue △ T and △ TNewly+ 2 DEG C compare, until △ T is less than △ TNewlyWhen+2 DEG C, air-conditioning enters into the defrost stage.
Trineutron situation is when operation time t compressor being detected reaches the second scheduled time t2, wind speed indoor fan being detected is mild wind, now air-conditioning enters into the defrost stage, when wind speed indoor fan being detected is not mild wind, whether the operation time t of detection compressor is more than described 3rd scheduled time t3, now air-conditioning can enter in the first subcase or second seed situation, namely when detecting that the operation time t of compressor is more than the second scheduled time t2 and less than the 3rd scheduled time t3, by difference △ T and predetermined threshold △ TNewlyCompare, if △ T is less than predetermined threshold △ TNewly, then air-conditioning enters into the defrost stage, if △ T is more than predetermined threshold △ TNewly, then continue to compare △ T and △ TNewly, until △ T is less than predetermined threshold △ TNewlyTime, stop comparing, now air-conditioning enters into the defrost stage.When detecting that the operation time t of compressor is more than the 3rd scheduled time t3, it is judged that whether the △ T detected is less than △ TNewly+ 2 DEG C, if △ T is less than △ TNewly+ 2 DEG C, then air-conditioning enters into the defrost stage, if △ T is more than △ TNewly+ 2 DEG C, then continue △ T and △ TNewly+ 2 DEG C compare, until △ T is less than △ TNewlyWhen+2 DEG C, air-conditioning enters into the defrost stage.
In other words, being worth being understood by, when being in the first subcase or the second subcase when air-conditioning, the wind speed of indoor fan is not mild wind state.
In 4th, subcase is in the running of compressor, when the operation time t of compressor is not up to the second scheduled time t2, is detected by difference △ T less than predetermined threshold △ TNewly, and difference △ T is less than predetermined threshold △ TNewlySituation be continued until when the operation time t of compressor reaches the second scheduled time t2, in other words, when the operation time t of compressor reaches the second scheduled time t2, difference △ T is still less than predetermined threshold △ TNewly, it was shown that air-conditioning frosting is serious, and air-conditioning enters into the defrost stage, now defrost time DTAlwaysIt is forced to 10 minutes, to ensure defrosting effect.
In the defrost stage, bring into operation after compressor the 6th scheduled time △ t1 first out of service, outdoor fan and cross valve are out of service after first running the 7th scheduled time △ t3, and outdoor fan is out of service after first running the 8th scheduled time △ t2, as defrost time DTAlwaysTo or detect continuous 5th scheduled time t5 of electric current of compressor meet or exceed defrost exit current parameters time, defrost terminates.Then the air-conditioning time started is the defrost tenth skill of the 9th scheduled time △ t4, and now compressor is out of service, and indoor fan keeps run-stopping status, brings into operation after cross valve the tenth scheduled time △ t5 out of service, and outdoor fan is in running status.Thus air-conditioning completes the defrosting action in a stage, the operation time t zero of air-conditioning, then compressor re-enters into heating mode, and continues to detect the operation time t of compressor in the running of compressor, and detects whether outdoor fan closes, and so circulates.
Describe the Defrost method of the air-conditioning according to one specific embodiment of the present invention below with reference to Fig. 4, illustrate for high wind for the wind speed of indoor fan below.
Set defrost parameter value △ THigh=17 DEG C, ta=60 minute, tb=80 minute, tc=95 minute, td=110 minute, te=120 minute, DT1=6 minute, △ t1=35, △ t2=10, △ t3=30, △ t4=20, △ t5=17, first scheduled time t1 is 90 minutes, second scheduled time t2 is 42 minutes, and the 3rd scheduled time t3 is 120 minutes.
Compressor enters into heating mode and indoor fan is that high wind runs, detecting that outdoor fan is in the operation time t of continuously running duty and detection compressor is 70 minutes, namely the operation time t of compressor is more than second scheduled time and less than the 3rd scheduled time, indoor environment temperature T1=20 DEG C now detected, temperature T2=36.5 DEG C of indoor heat exchanger, calculates predetermined threshold △ T according to formulaNewly:
1) defrost temperature difference correction factor △ T2 is calculated:
A) when T1 >=18 DEG C, Δ T2=0
2) △ T is calculatedNewly:
△TNewly=△TNew peak=△ THigh-ΔT2=△THigh=17℃。
T=T2-T1=36.5 DEG C-20 DEG C=16.5 DEG C < △ T of this time difference value △Newly, air-conditioning enters into the defrost stage.
In the defrost stage, do not occur that the electric current of compressor meets or exceeds defrost in continuous 7 seconds and exits current parameters, now according to following table:
The operation time t of compressor is positioned at situation 2, thus the defrost time DT of air-conditioningAlwaysIt it is 7 minutes.
At defrost time DTAlwaysIn, first bring into operation until the defrost time terminates after compressor 35s out of service, cross valve runs after 30s and always out of service to terminate to the defrost time, outdoor fan runs after 30s and always out of service to terminate to the defrost time, and indoor fan is out of service after running 10s to be terminated to the defrost time, and in the defrost tenth skill that the time is 20s, compressor is out of service, cross valve brings into operation after continuously off 17 seconds, and outdoor fan is in running status, and indoor fan is out of service.After defrost terminates, the operation time t zero of compressor, the newly entering heating mode of weight of compressor, so repeats.
Other of air-conditioning according to embodiments of the present invention constitute such as vaporizer and condenser etc. and operation is all known for those of ordinary skills, are not detailed herein.
In the description of this specification, 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 in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: these embodiments can being carried out multiple change, amendment, replacement and modification when without departing from principles of the invention and objective, the scope of the present invention is limited by claim and equivalent thereof.
Claims (9)
1. a Defrost method for air-conditioning, described air-conditioning includes compressor, indoor fan, indoor heat exchanger, outdoor fan and cross valve, it is characterised in that comprise the steps:
S1: described compressor entrance heating mode, and detect the operation time t of described compressor, detect whether described outdoor fan closes simultaneously；
S2: when detecting in step S1 that described outdoor fan interval is closed, detects when the closedown of described outdoor fan and described compressor operating, and whether the accumulated running time t of described compressor reaches the first scheduled time t1；
S3: when accumulated running time t being detected be more than or equal to the first scheduled time t1, described air-conditioning enters into the defrost stage, when accumulated running time t being detected less than the first scheduled time t1, then returns to step S2；
S4: when described outdoor fan continuous service being detected in step S1, then detect the operation time t of described compressor whether more than the second scheduled time t2, and the difference △ T=T2-T1 and predetermined threshold △ T of the temperature T2 and indoor environment temperature T1 of described indoor heat exchanger that will detect in the process of described compressor operatingNewlyCompare；
S5: when detecting in step S4 that the operation time t of described compressor is more than the second scheduled time t2 and less than the 3rd scheduled time t3, it is judged that whether the △ T detected is less than predetermined threshold △ TNewly；
S6: when in step S5 when being judged as YES, described air-conditioning enters the defrost stage, and when when being judged as NO of step S5, then whether the △ T continuing to judge to detect less than △ TNewly；
S7: when detecting in step S4 that the operation time t of described compressor is more than the 3rd scheduled time t3, it is judged that whether the △ T detected is less than △ TNewly+ 2 DEG C；
S8: when in step S7 when being judged as YES, described air-conditioning enters the defrost stage, when in step S7 when being judged as NO, then continue to judge that whether the △ T that detects is less than △ TNewly+ 2 DEG C；
S9: in the described defrost stage, the defrost time DT when described operation of air conditionerAlwaysOr when defrost end signal being detected, defrost terminates, and returns to step S1, so circulates.
2. the Defrost method of air-conditioning according to claim 1, it is characterised in that step S4 also includes:
S41: in the process of described compressor operating, when the difference △ T detected is less than △ TNewlyTime, whether detect the operation time t of described compressor more than described second scheduled time t2；
S42: < during t2, then continuing detection when the operation time t of described compressor is equal to described second scheduled time t2, whether difference △ T is still less than △ T as tNewly；
S43: when in step S42 when being judged as YES, then set defrost time DTAlwaysIt is the 4th scheduled time t4.
3. the Defrost method of air-conditioning according to claim 2, it is characterised in that described 4th scheduled time t4 is ten minutes.
4. the Defrost method of air-conditioning according to claim 1, it is characterised in that the △ T in step S4-S8NewlyBy △ TWind speed, indoor environment temperature T1 and defrost temperature difference correction factor △ T2 note draw:
1) △ T2 is calculated:
A) when T1 >=18 DEG C, Δ T2=0；
B) as 0≤T1 < 18 DEG C, Δ T2=(20-T1)/8, directly adopting the shift division of single-chip microcomputer, result only has integer part；
C) as T1 < 0, Δ T2=2；
2) △ T is calculatedNewly:
△TNewly=△TWind speed-Δ T2；Wherein △ TWind speedFor the defrost parameter value that the wind speed according to described indoor fan sets.
5. the Defrost method of air-conditioning according to claim 1, it is characterised in that also comprise the steps:
S10: when described compressor operating being detected in step S4 to described second scheduled time t2, whether the wind speed detecting described indoor fan is mild wind；
Whether S11: when detecting that described wind speed is mild wind, enter into the defrost stage, when detecting that described wind speed is not for mild wind, detect the operation time t of described compressor more than described 3rd scheduled time t3；
S12: when detecting that the operation time t of described compressor is more than the second scheduled time t2 and less than the 3rd scheduled time t3, and judge that the △ T detected is less than predetermined threshold △ TNewlyTime, described air-conditioning enters the defrost stage；When detecting that the operation time t of described compressor is more than the 3rd scheduled time t3, and judge that the △ T detected is less than △ TNewlyWhen+2 DEG C, described air-conditioning enters the defrost stage.
6. the Defrost method of air-conditioning according to claim 1, it is characterised in that described defrost end signal is detect that continuous 5th scheduled time t5 of electric current of described compressor meets or exceeds defrost and exits current parameters.
7. the Defrost method of air-conditioning according to claim 6, it is characterised in that described 5th scheduled time t5 is 7 seconds.
8. the Defrost method of the air-conditioning according to any one of claim 1-7, it is characterised in that at described defrost time DTAlwaysIn, described compressor the 6th scheduled time △ t1 first out of service, then described compressor starts is run；First described outdoor fan and described cross valve run the 7th scheduled time △ t3, and then described outdoor fan and described cross valve are out of service；First described indoor fan runs the 8th scheduled time △ t2, and then described indoor fan is out of service.
9. the Defrost method of air-conditioning according to claim 1, it is characterized in that, in step s 9, described air-conditioning has the defrost tenth skill of the 9th scheduled time △ t4 after defrost terminates, in described 9th scheduled time △ t4, described compressor and described indoor fan are out of service, bring into operation after described cross valve the tenth scheduled time △ t5 out of service, and described outdoor fan runs.
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| CN104279698A (en) * | 2014-09-28 | 2015-01-14 | 芜湖美智空调设备有限公司 | Mobile air conditioner and defrosting control method thereof |
| CN104819542B (en) * | 2015-03-27 | 2017-12-29 | 广东美的制冷设备有限公司 | Defrosting control method, device and the air conditioner of air conditioner |
| CN104913452B (en) * | 2015-06-03 | 2017-11-10 | 广东美的制冷设备有限公司 | Air conditioner and its defrosting control method |
| CN104913455B (en) * | 2015-06-05 | 2017-11-14 | 美的集团武汉制冷设备有限公司 | Defrosting control method, device and the terminal of air conditioner |
| CN105318619B (en) * | 2015-10-23 | 2017-11-28 | 珠海格力电器股份有限公司 | Air-conditioning defrosting control method and device |
| CN106352443A (en) * | 2016-10-25 | 2017-01-25 | 美的集团武汉制冷设备有限公司 | Base plate structure, air conditioner and defrosting control method for air conditioner |
| CN106705377A (en) * | 2017-01-10 | 2017-05-24 | 美的集团武汉制冷设备有限公司 | Defrosting control method and system and heat pump type air conditioner |
| CN106679117A (en) * | 2017-01-24 | 2017-05-17 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method and device |
| CN108954674A (en) * | 2018-05-24 | 2018-12-07 | 青岛海尔空调器有限总公司 | air conditioner defrosting control method |
| CN108800434A (en) * | 2018-05-24 | 2018-11-13 | 青岛海尔空调器有限总公司 | air conditioner defrosting control method |
| CN109028461A (en) * | 2018-05-24 | 2018-12-18 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN108800441B (en) * | 2018-06-25 | 2019-08-27 | 宁波奥克斯电气股份有限公司 | Multi-connected machine defrosting control method and air conditioning multi-couple machine system |
| CN111692709B (en) * | 2019-04-03 | 2021-10-15 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting control method and device and air conditioner |
| CN111895597B (en) * | 2019-05-06 | 2022-07-19 | 武汉海尔电器股份有限公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN110645675B (en) * | 2019-09-23 | 2021-02-02 | 南京天加环境科技有限公司 | Improved defrosting control method for air conditioner |
| CN112696839B (en) * | 2019-10-18 | 2022-12-27 | 广东美的制冷设备有限公司 | Air conditioning system, air conditioner and control method and control device of air conditioner |
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| CN112161393A (en) * | 2020-08-28 | 2021-01-01 | 珠海格力电器股份有限公司 | Method and device for customizing functions of household appliance, electronic equipment and storage medium |
| CN114322219A (en) * | 2021-12-06 | 2022-04-12 | 海信（山东）空调有限公司 | Air conditioner defrosting control method, air conditioner and computer storage medium |
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