CN104165486A - Defrosting method of air conditioner - Google Patents

Defrosting method of air conditioner Download PDF

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Publication number
CN104165486A
CN104165486A CN201310184792.8A CN201310184792A CN104165486A CN 104165486 A CN104165486 A CN 104165486A CN 201310184792 A CN201310184792 A CN 201310184792A CN 104165486 A CN104165486 A CN 104165486A
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time
defrost
air
conditioner
compressor
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CN104165486B (en
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李炜征
文邦春
吴加生
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Midea Group Co Ltd
Guangdong Midea Group Wuhu Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea Group Wuhu Air Conditioning Equipment Co Ltd
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Abstract

The invention discloses a defrosting method of an air conditioner. The defrosting method comprises the following steps: (S1) the operation time M of a compressor is detector; (S2) when the M is greater than M1, the temperature T of a pipe on an outdoor condenser or an indoor evaporator is detected to determine a maximal value Tmax; (S3) the needed time t of each reduction of the Tmax by delta T DEG C is detected, and is compared with a first predetermined value tt1 and a second predetermined value tt2; (S4) when the t is greater than the tt1 and smaller than the tt2, and the M is not smaller than the M2, the air conditioner enters a defrosting phase; and (S5) in the defrosting phase, when the air conditioner operates by the defrosting time DT or detects a defrosting quit signal, the defrosting is finished, the step S1 is returned to, and the operation is recycled like this. According to the defrosting method of the air conditioner disclosed by the invention, the defrosting of the air conditioner in the frosting state can be guaranteed, so that the no-frost defrosting condition in the heating operation process of the air conditioner is reduced, the effective heating operation time is prolonged, and the heating quantity is increased.

Description

The Defrost method of air-conditioner
Technical field
The present invention relates to living electric apparatus field, especially relate to a kind of Defrost method of air-conditioner.
Background technology
In existing intelligent defrosting method the setting of defrost time formulate taking worst operating mode as benchmark, the time of defrost is longer, and general frosting situation does not need the time of growing so to defrost, and causes waste, affects heating operation.And in service in defrost, indoor heat exchanger temperature can reduce, and the temperature conditions that defrost is exited is generally inoperative always, make indoor heat exchanger surface frosting even icing, until indoor heat exchanger temperature reaches a steady state value.
Existing intelligent defrosting method there will be problem below, in the time that air-conditioner operation a period of time will reach defrosting condition due to the shutdown of a variety of causes air-conditioner, now outdoor heat exchanger has been tied many frosts, in the time that heat running next time, air-conditioner will be with frost operation, easily cause the frost on air-conditioner cumulative, be not easy to remove.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art.
For this reason, time when one object of the present invention is to propose a kind of variations in temperature by sensing chamber's external condenser changes the Defrost method of the air-conditioner that reduces the operating frostless defrost situation of air-conditioner.
Another object of the present invention is to propose the Defrost method that a kind of time when detecting the variations in temperature in indoor evaporator changes the air-conditioner that reduces the operating frostless defrost situation of air-conditioner.
According to the Defrost method of the air-conditioner of first aspect present invention embodiment, described air-conditioner comprises outdoor condenser and compressor, comprises the steps: S1: described air-conditioner enters heating mode, detects M running time of described compressor; S2: when detecting that M running time of described compressor reaches after the first scheduled time M1, detect the pipe temperature T on described outdoor condenser and compare to determine a maximum of T max; S3: the maximum of T in detecting step S2 maxt DEG C of needed time t of every reduction △, and by described time t and the first predetermined value tt 1with the second predetermined value tt 2compare; S4: work as tt 1<t<tt 2time and M running time of described compressor while reaching the second scheduled time M2, described air-conditioner enters defrost phase; As t>=tt 2or t≤tt 1time, get back to step S3; S5: in described defrost phase, in the time that described air-conditioner has moved defrost time D T or detected that signal is exited in defrost, defrost finishes, and gets back to step S1, so circulation.
According to the Defrost method of the air-conditioner of the embodiment of the present invention, by the pipe temperature T of measuring chamber external condenser, to judge the variations in temperature of outdoor condenser when the frostless and frosting different conditions, and by above-mentioned determination methods, can ensure that air-conditioner defrosts in the time of frosting state, reduce the frostless defrost situation in air-conditioning heating running, increased effective heating operation time, improved heating capacity.
In addition, also there is following additional technical feature according to the Defrost method of air-conditioner of the present invention:
According to some embodiments of the present invention, the Defrost method of described air-conditioner also comprises the steps: S6: by the maximum of T in step S2 maxcompare with the difference △ T1 of Ts and setting value TC2, wherein Ts is the minimum temperature that the temperature sensor of detector tube temperature T can accurate detection; S7: in the time that difference △ T1 is less than setting value TC2 and being continued until and detects that M running time of described compressor reaches the second scheduled time M2, described air-conditioner enters defrost phase.
According to the Defrost method of the air-conditioner of the embodiment of the present invention, by by maximum of T maxcompare with setting value TC2 with the difference △ T1 of Ts, when the difference △ T1 of the temperature T s that can detect at the pipe Wen WenduT of outdoor condenser and temperature sensor is less than the temperature difference that control program can distinguish, avoid air-conditioner cannot enter defrost phase, guarantee that air-conditioner is in the time that low temperature environment moves, can enter smoothly defrost phase.
Particularly, described defrost is exited signal and is set value TC4 for detecting that described pipe temperature T is more than or equal to.
In some embodiments of the invention, in described defrost phase, when described air-conditioner shuts down or detects that described air-conditioner is converted to non-heating mode, defrost finishes.
Particularly, the scope of described △ T DEG C is 0.5 DEG C-3 DEG C, described the first scheduled time tt 1be 1 minute, described the second predetermined value tt 2it is 20 minutes.
Preferably, described △ T DEG C is 1 DEG C.
According to the Defrost method of the air-conditioner of second aspect present invention embodiment, described air-conditioner comprises indoor fan, indoor evaporator and compressor, comprise the steps: S1: described air-conditioner enters heating mode, detect the m and the windscreen of described indoor fan running time of described compressor; S2: when detecting that m running time of described compressor reaches after the 5th scheduled time m1, detect the pipe temperature H of described indoor evaporator and compare to determine a maximum H max; S3: the maximum H in detecting step S2 maxh DEG C of needed time N of every reduction △, and by described time N and the 3rd predetermined value NN 1with the 4th predetermined value NN 2compare; S4: when occurring NN 1<N<NN 2and when m running time of described compressor reaches the 6th scheduled time m2, described air-conditioner enters defrost phase; As N>=NN 2or N≤NN 1time, get back to step S3; S5: in described defrost phase, in the time that described air-conditioner has moved defrost time D DT or detected that signal is exited in defrost, defrost finishes, and gets back to step S1, so circulation.
According to the Defrost method of the air-conditioner of the embodiment of the present invention, by measuring the pipe temperature H of indoor evaporator, to judge the variations in temperature of indoor evaporator when the frostless and frosting different conditions, and by above-mentioned determination methods, ensure that air-conditioner defrosts in the time of frosting state, reduce the frostless defrost situation in air-conditioning heating running, increase effective heating operation time, improve heating capacity, simultaneously by defrost termination condition, exit signal by defrost time or defrost and control the Defrost operation time, increase the effective time of air conditioner heat-production operation, further improve the heating capacity of air-conditioner.
In addition, also there is following additional technical feature according to the Defrost method of air-conditioner of the present invention:
Further, when NN appears in continuous several times in described step S4 1<N<NN 2and when m running time of described compressor reaches the 6th scheduled time m2, described air-conditioner enters defrost phase.Thereby can avoid accidentally occurring NN due to refrigeration system fluctuation 1<N<NN 2, can avoid entering into defrost phase because the fluctuation of refrigeration system makes air-conditioner, thereby can improve the stability of the Defrost method of this air-conditioner.
According to some embodiments of the present invention, the Defrost method of described air-conditioner also comprises the steps: S6: in the time detecting that the windscreen of described indoor fan changes the second gear into from the first gear, detect from described the first gear and change the pipe temperature H11 the described indoor evaporator in variation moment of described the second gear into; S7: detecting after described compressor operating the 7th scheduled time m3, detecting the pipe temperature H12 in described indoor evaporator, pipe temperature H12 and H11 are compared to obtain temperature compensation value △ H1=H12-H11; S8: when detecting that m running time of described compressor reaches after the 5th scheduled time m1, detect the pipe temperature H in described indoor evaporator, and described Guan Wen is calculated to compensation temperature H-△ H1 through temperature-compensating, described compensation temperature is compared to determine a maximum H max, enter step S3.
According to the Defrost method of the air-conditioner of the embodiment of the present invention, in the time that the windscreen that indoor fan detected changes, carry out accounting temperature offset by the pipe temperature detecting in indoor evaporator, with to after temperature on the Guan Wen that detects compensate, thereby can to avoid traditional temperature compensation value be the frostless defrosting that causes of constant or enter in advance the phenomenons such as defrost state, further ensure that air-conditioner defrosts in the time of frosting state, reduce the frostless defrost situation in air-conditioning heating running, increase effective heating operation time, further improve heating capacity.
In some embodiments of the invention, the Defrost method of described air-conditioner also comprises the steps: S9: when detecting that whether m running time of described compressor reaches after the 5th scheduled time m1, detect described indoor fan in stopped status; S10: when detecting that described indoor fan is in the time that stopped status and m running time that described compressor detected reach the 6th scheduled time m2; described air-conditioner enters defrost phase; in the time detecting that described indoor fan is in running order, detect the pipe temperature H of described indoor evaporator and compare to determine a maximum H max, enter step S3.
According to the Defrost method of the air-conditioner of the embodiment of the present invention; detecting that indoor fan is in the time that stopped status and m running time that compressor detected reach the 6th scheduled time m2; air-conditioner enters into defrost state; further ensure that air-conditioner defrosts in the time of frosting state; reduce the frostless defrost situation in air-conditioning heating running; increase effective heating operation time, further improved heating capacity.
Particularly, to exit signal be that the running current that described compressor detected is more than or equal to predetermined current value in described defrost.
In some embodiments of the invention, in described defrost phase, when described air-conditioner shuts down or detects that described air-conditioner is converted to non-heating mode, defrost finishes.
Particularly, the scope of described △ H DEG C is 0.5 DEG C-3 DEG C, described the 3rd scheduled time NN 1be 1 minute, described the 4th predetermined value NN 2it is 20 minutes.
Preferably, described △ H DEG C is 1 DEG C.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 is according to the flow chart of the Defrost method of the air-conditioner of first aspect present invention embodiment;
Fig. 2 is according to the flow chart of the Defrost method of the air-conditioner of second aspect present invention embodiment.
Detailed description of the invention
Describe embodiments of the invention below in detail, 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 identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of instructions such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importance.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.In addition,, in description of the invention, except as otherwise noted, the implication of " multiple " is two or more.
Describe according to the Defrost method of the air-conditioner of first aspect present invention embodiment below with reference to Fig. 1, wherein, air-conditioner comprises the elements such as outdoor condenser, compressor, indoor evaporator, air-conditioner heat principle and refrigeration principle etc. by those skilled in the art is known, be not just described in detail here.
According to the Defrost method of the air-conditioner of first aspect present invention embodiment, comprise the steps:
S1: air-conditioner enters heating mode, M running time of detection compressor.
S2: when detecting that M running time of compressor reaches after the first scheduled time M1, the pipe temperature T on sensing chamber's external condenser also compares to determine a maximum of T max, wherein, being worth understanding, the pipe temperature T detecting is changing value, and maximum of T maxshould be interpreted broadly, i.e. this maximum of T maxcan be changing value, for example, along with the prolongation of compressor operating time M, detect that the pipe temperature T of different time points is more, now the maximum of T between multiple pipe temperature T maxcan change also and can remain unchanged along with the prolongation of compressor operating time M.
S3: the maximum of T in detecting step S2 maxt DEG C of needed time t of every reduction △, and by time t and the first predetermined value tt 1with the second predetermined value tt 2compare.
S4: work as tt 1<t<tt 2time and M running time of compressor while reaching the second scheduled time M2, air-conditioner enters defrost phase; As t>=tt 2or t≤tt 1time, get back to step S3.That is to say, in the time that the running time of compressor, M met M1 < M < M2, by time t and the first predetermined value tt 1with the second predetermined value tt 2compare, meet tt when simultaneously 1<t<tt 2and when M>=M2, air-conditioner enters defrost phase.
Particularly, maximum of T maxreduce T DEG C of △ to reach the needed time t0 of the first pipe temperature T1, i.e. T1=T max-△ T DEG C, and by time t0 and the first predetermined value tt 1with the second predetermined value tt 2compare.Work as tt 1<t0<tt 2time stop comparison and in the time that M running time that compressor detected reaches the second scheduled time M2, air-conditioner enters defrost phase, as t0>=tt 2or t0≤tt 1time, continue to detect the warm T1 of the first pipe and reduce T DEG C of △ to reach the needed time t1 of the second pipe temperature T2, i.e. T2=T1-△ T DEG C, and by time t1 and the first predetermined value tt 1with the second predetermined value tt 2compare.Work as tt 1<t1<tt 2time stop comparison, and in the time that M running time that compressor detected reaches the second scheduled time M2, air-conditioner enters defrost phase, as t1>=tt 2or t1≤tt 1time, continuing to detect T DEG C of the warm T2 reduction of the second pipe △ and manage the needed time t2 of warm T3 to reach the 3rd, i.e. T3=T2-△ T DEG C, so repeats, until tt 1<tn<tt 2time stop comparison, and in the time that M running time that compressor detected reaches the second scheduled time M2, air-conditioner enters defrost phase, wherein n is more than or equal to 0.
Wherein, be worth understanding, by tn and the first predetermined value tt 1with the second predetermined value tt 2in the process comparing, when the maximum of T detecting maxwhile changing, recalculate maximum of T maxt DEG C of needed time t of every reduction △, and by t and the first predetermined value tt 1with the second predetermined value tt 2compare, so repeat.
S5: in described defrost phase, in the time that described air-conditioner has moved defrost time D T or detected that signal is exited in defrost, defrost finishes, and gets back to step S1, so circulation.Particularly, defrost is exited signal and is more than or equal to setting value TC4 for the warm T of pipe being detected, and wherein, setting value TC4 can specifically set according to actual conditions.In examples more of the present invention, setting value TC4 is 20 DEG C.
Wherein, in the Defrost method of invention, by the pipe temperature T of temperature sensor sensing chamber external condenser, and by the M and manage warm T and transfer back in the control program of air-conditioner and record, relatively etc. running time detecting.The first scheduled time M1, the second scheduled time M2, △ T DEG C, the first predetermined value tt 1, the second predetermined value tt 2can specifically set according to the detection error of the practical operation situation of different compressors and different temperatures sensor etc. with defrost time D T.In examples more of the present invention, the scope of △ T DEG C is 0.5 DEG C-3 DEG C, and preferably, △ T DEG C is 1 DEG C.The first scheduled time tt 1be 1 minute, the second predetermined value tt 2be 20 minutes, the first scheduled time M1 is 8 minutes, and the second scheduled time M2 is 45 minutes.
In other words, air-conditioner is under heating mode, and compressor moves after the first scheduled time M1 continuously, starts to sample and the pipe temperature T of the outdoor condenser that records, relatively detect, determines the maximum of T of a warm T of pipe max, afterwards whenever maximum of T maxwhile reducing T DEG C of △, record T DEG C of needed time tn of the n time reduction △, as time tt 1<tn<tt 2time and M running time that compressor detected while reaching the second scheduled time M2, air-conditioning enters into defrost phase, wherein, in this process, if manage the maximum of T of warm T maxwhile changing, recalculate whenever maximum of T maxthe needed time while reducing T DEG C of △.
According to the Defrost method of the air-conditioner of the embodiment of the present invention, by the pipe temperature T of measuring chamber external condenser, to judge the variations in temperature of outdoor condenser when the frostless and frosting different conditions, and by above-mentioned determination methods, can ensure that air-conditioner defrosts in the time of frosting state, reduce the frostless defrost situation in air-conditioning heating running, increased effective heating operation time, improved heating capacity.
According in some embodiments of the present invention, the Defrost method of air-conditioner also comprises the steps:
S6: by the maximum of T in step S2 maxcompare with the difference △ T1 of Ts and setting value TC2, wherein Ts is the minimum temperature that the temperature sensor of detector tube temperature T can accurate detection.Wherein set value concrete settings the such as temperature difference that TC2 can distinguish according to the practical operation situation of compressor and control program, in examples more of the present invention, setting value TC2 is 3 DEG C.
S7: in the time that difference △ T1 is less than setting value TC2 and being continued until and detects that M running time of compressor reaches the second scheduled time M2, in other words, during from beginning detector tube temperature T, difference △ T1 is less than setting value TC2 until detect that when M running time of compressor reaches the second scheduled time M2, air-conditioner enters defrost phase always.
According to the Defrost method of the air-conditioner of the embodiment of the present invention, by by maximum of T maxcompare with setting value TC2 with the difference △ T1 of Ts, when the difference △ T1 of the temperature T s that can detect at the pipe Wen WenduT of outdoor condenser and temperature sensor is less than the temperature difference that control program can distinguish, avoid air-conditioner cannot enter defrost phase, guarantee that air-conditioner is in the time that low temperature environment moves, can enter smoothly defrost phase.
In some embodiments of the invention, the defrosting control method of air-conditioner also comprises the steps:
S8: when the maximum of T detecting in step S2 maxwhen being less than setting value TC3 and continuing the 3rd scheduled time M3, detect M running time of compressor, wherein setting value TC3 can specifically set according to actual conditions, and alternatively, the 3rd scheduled time M3 can be 5 minutes.In examples more of the present invention, setting value TC3 is-3 DEG C.
S9: in the time that M running time of detection compressor reaches the second scheduled time M2, air-conditioner enters into defrost phase, and setting defrost time D T was the 4th scheduled time.Particularly, the 4th scheduled time was 10 minutes.In other words, entering continuous the 3rd scheduled time M3 before defrost, maximum of T maxbe less than setting value TC3, air-conditioning enters into defrost phase.
According to the defrosting control method of the air-conditioner of the embodiment of the present invention, by by maximum of T maxtC3 compares with setting value, the condition that enters for the first time defrost phase is simplified, while avoiding after powering on first, shutting down start again or translative mode, on the outdoor condenser of air-conditioner, there is frost and be with frost operation, guarantee that the frost on outdoor condenser can not exist for a long time, to avoid causing frost to become the adverse consequences of ice.Wherein, in description of the invention, after shutdown, start refers to air-conditioning while shutdown for the first time and is about to enter but does not also enter into defrost phase again, now on the outdoor condenser of air-conditioner, has had frost.
What be worth understanding is, in the air-conditioner of invention, can in the button of the remote controller of air-conditioner, be provided with three buttons and be respectively the first button, the second button and the 3rd button, the first button can be corresponding with step S1-step S5 Defrost method corresponding, the second button can be corresponding with step S1-S2-S6-S7-S5 Defrost method corresponding, the 3rd button can be corresponding with step S1-S2-S8-S9-S5 Defrost method corresponding, in other words, in the time that user selects the first button, what air-conditioning carried out is the Defrost method corresponding with step S1-step S5, in the time that user selects the second button, what air-conditioning carried out is the Defrost method corresponding with step S1-S2-S6-S7-S5, in the time that user selects the 3rd button, what air-conditioning carried out is the Defrost method corresponding with step S1-S2-S8-S9-S5, be that user can select the second button so that air-conditioning is defrosted in low temperature environment, user can power on first, start or select the 3rd button to defrost for the first time to air-conditioning when translative mode again after shutdown, after this cancel the 3rd button and select the first button or the second button, so that air-conditioning is carried out to defrosting next time.
According to some embodiments of the present invention, in defrost phase, when air-conditioner shuts down or detects that air-conditioner is converted to non-heating mode, defrost finishes.And what deserves to be explained is, air-conditioner has the defrost tenth skill of certain hour after defrost finishes, and air-conditioner of the present invention is in defrost tenth skill, and the action of compressor is not subject to the restriction of three minutes delay protections.Meanwhile, in the defrost stage, air-conditioner does not detect for detection of the sensor of indoor evaporator whether have fault.
Describe according to the Defrost method of the air-conditioner of second aspect present invention embodiment below with reference to Fig. 2, wherein, air-conditioner comprises the elements such as outdoor condenser, compressor, indoor evaporator, indoor fan, air-conditioner heat principle and refrigeration principle etc. by those skilled in the art is known, be not just described in detail here.
According to the Defrost method of the air-conditioner of second aspect present invention embodiment, comprise the steps:
S1: air-conditioner enters heating mode, detects the m and the windscreen of indoor fan running time of compressor, wherein, what deserves to be explained is, the windscreen of indoor fan is multiple, as high windscreen, low windscreen, middle windscreen etc.
S2: when detecting that m running time of compressor reaches after the 5th scheduled time m1, detect the pipe temperature H in indoor evaporator and compare to determine a maximum H max, wherein, being worth understanding, the pipe temperature H detecting is changing value, and maximum H maxshould be interpreted broadly, i.e. this maximum H maxcan be changing value, for example, along with the prolongation of compressor operating time m, detect that the pipe temperature H of different time points is more, now the maximum H between multiple pipe temperature H maxcan change also and can remain unchanged along with the prolongation of compressor operating time m.
S3: the maximum H in detecting step S2 maxh DEG C of needed time N of every reduction △, and by time N and the 3rd predetermined value NN 1with the 4th predetermined value NN 2compare.
S4: when occurring NN 1<N<NN 2and when m running time of compressor reaches the 6th scheduled time m2, air-conditioner enters defrost phase; As N>=NN 2or N≤NN 1time, get back to step S3.That is to say, in the time that the running time of compressor, m met m1 < m < m2, by time N and the 3rd predetermined value NN 1with the 4th predetermined value NN 2compare, meet NN when simultaneously 1<N<NN 2and when m>=m2, air-conditioning enters defrost phase.
Particularly, by maximum H maxreduce by one △ H DEG C to reach the needed time N0 of the first pipe temperature H1, i.e. H1=H max-△ H DEG C, and by time N0 and the 3rd predetermined value NN 1with the 4th predetermined value NN 2compare.Work as NN 1<N0<NN 2time stop comparison, and in the time that m running time that compressor detected reaches the 6th scheduled time m2, air-conditioner enters defrost phase, as N0>=NN 2or N0≤NN 1time, continue to detect the warm H1 of the first pipe and reduce H DEG C of △ to reach the needed time N1 of the second pipe temperature H2, i.e. H2=H1-△ H DEG C, and by time N1 and the 3rd predetermined value NN 1with the 4th predetermined value NN 2compare.Work as NN 1<N1<NN 2time stop comparison, and in the time that m running time that compressor detected reaches the 6th scheduled time m2, air-conditioner enters defrost phase, as N1>=NN 2or N1≤NN 1time, continuing to detect H DEG C of the warm H2 reduction of the second pipe △ and manage the needed time N2 of warm H3 to reach the 3rd, i.e. H3=H2-△ H DEG C, so repeats, until NN 1<Nn<NN 2time stop comparison and in the time that m running time that compressor detected reaches the 6th scheduled time m2, air-conditioner enters defrost phase, wherein n is more than or equal to 0.
Wherein, be worth understanding, by Nn and the 3rd predetermined value NN 1with the 4th predetermined value NN 2in the process comparing, as the maximum H detecting maxwhile changing, recalculate maximum H maxh DEG C of needed time N of every reduction △, and by N and the first predetermined value NN 1with the second predetermined value NN 2compare, so repeat.
S5: in defrost phase, in the time that air-conditioner has moved defrost time D DT or detected that signal is exited in defrost, defrost finishes, and gets back to step S1, so circulation.Particularly, to exit signal be that the running current that compressor detected is more than or equal to predetermined current value in defrost.Wherein, predetermined current value can specifically be set according to actual conditions.What deserves to be explained is, in the time that air-conditioner can detect the running current of compressor, in defrost phase, can be in the time that air-conditioner have moved defrost time D DT or has detected that signal is exited in defrost, defrost finishes, i.e. and it is effective that signal is exited in this defrost.In the time that air-conditioner cannot detect the running current of compressor, in defrost phase, when air-conditioner has moved defrost time D DT, defrost finishes, i.e. invalidating signal is exited in this defrost.
Wherein, in the Defrost method of invention, detects the pipe temperature H of indoor evaporator by temperature sensor, and m running time detecting is recorded, relatively etc. with managing warm H and transfer back in the control program of air-conditioner.The 5th scheduled time m1, the 6th scheduled time m2, △ H DEG C, the 3rd predetermined value NN 1, the 4th predetermined value NN 2can be according to concrete settings such as the detection errors of the practical operation situation of different compressors and different temperatures sensor.In examples more of the present invention, the scope of △ H DEG C is 0.5 DEG C-3 DEG C, and preferably, △ H DEG C is 1 DEG C.The 3rd scheduled time NN 1be 1 minute, the 4th predetermined value NN 2be 20 minutes, the 5th scheduled time m1 is 8 minutes, and the 6th scheduled time m2 is 45 minutes.
Particularly, defrost time D DT according to the form below calculates:
? Compressor accumulated running time runtime (minute) The defrost time (minute)
Situation 1 ta≤runtime＜tb DT1
Situation 2 tb≤runtime≤tc DT1+1
Situation 3 tc≤runtime≤td DT1+2.5
Situation 4 td＜runtime DT1+4.5
Wherein, time ta, tb, tc, td are for specifically to set according to actual conditions, and DT1 is defrost time parameter, set different defrost time parameter DT1 according to different refrigeration systems.
In a specific embodiment of the present invention, defrost time D DT is set as:
? Compressor accumulated running time runtime (minute) The defrost time (minute)
Situation 1 45≤runtime＜60 7.5
Situation 2 60≤runtime≤90 8.5
Situation 3 90≤runtime≤l20 10
Situation 4 120＜runtime 12
In other words, air-conditioner is under heating mode, and compressor moves after the 5th scheduled time m1 continuously, starts to sample and the pipe temperature H of the indoor evaporator that records, relatively detect, determines the maximum H of a warm H of pipe max, afterwards whenever maximum H maxwhile reducing H DEG C of △, record H DEG C of needed time Nn of the n time reduction △, as time NN 1<Nn<NN 2time and m running time that compressor detected while reaching the 6th scheduled time m2, air-conditioning enters into defrost phase, wherein, in this process, if manage the maximum H of warm H maxwhile changing, recalculate whenever maximum H maxthe needed time while reducing H DEG C of △.
According to the Defrost method of the air-conditioner of the embodiment of the present invention, by measuring the pipe temperature H of indoor evaporator, to judge the variations in temperature of indoor evaporator when the frostless and frosting different conditions, and by above-mentioned determination methods, ensure that air-conditioner defrosts in the time of frosting state, reduce the frostless defrost situation in air-conditioning heating running, increase effective heating operation time, improve heating capacity, simultaneously by defrost termination condition, exit signal by defrost time or defrost and control the Defrost operation time, increase the effective time of air conditioner heat-production operation, further improve the heating capacity of air-conditioner.
According in some embodiments of the present invention, when NN appears in continuous several times in step S4 1<N<NN 2and when m running time of compressor reaches the 6th scheduled time m2, air-conditioner enters defrost phase.That is to say, in the time that the running time of compressor, m met m1 < m < m2, when occurring a NN 1<N<NN 2time, do not stop comparison, and continue maximum H maxh DEG C of needed time N of every reduction △ and the 3rd predetermined value NN 1with the 4th predetermined value NN 2compare, when NN appears in continuous several times 1<N<NN 2time stop comparison and in the time that m running time that compressor detected reaches the 6th scheduled time m2, air-conditioner enters defrost phase.Thereby can avoid accidentally occurring NN due to refrigeration system fluctuation 1<N<NN 2, can avoid entering into defrost phase because the fluctuation of refrigeration system makes air-conditioner, thereby can improve the stability of the Defrost method of this air-conditioner.
In some embodiments of the invention, the Defrost method of air-conditioner also comprises the steps:
S6: in the time detecting that the windscreen of indoor fan changes the second gear into from the first gear, detect from the first gear and change the pipe temperature H11 the indoor evaporator in variation moment of the second gear into, in multiple windscreens that wherein the first gear is indoor fan one, the second gear is in remaining multiple windscreen, is different from the second gear as long as meet the first gear.
S7: detecting after compressor operating the 7th scheduled time m3, detecting the pipe temperature H12 in indoor evaporator, pipe temperature H12 and H11 are compared to obtain temperature compensation value △ H1=H12-H11.In examples more of the present invention, the 7th scheduled time m3 is 2 minutes.
S8: when detecting that m running time of compressor reaches after the 5th scheduled time m1, detect the pipe temperature H in indoor evaporator, and Guan Wen is calculated to compensation temperature H-△ H1 through temperature-compensating, compensation temperature is compared to determine a maximum H max, enter step S3.
Wherein what deserves to be explained is, if reach after the 5th scheduled time m1 at m running time that compressor detected, the windscreen that indoor fan just detected changes, and need after compressor continuation operation the 7th scheduled time m3 being detected, just judge maximum H max.If before m running time that compressor detected reaches the 5th scheduled time m1, change with regard to the windscreen that indoor fan detected, need after reaching the 5th scheduled time m1, m running time that compressor detected just judge maximum H max.
What be worth understanding is, in the time detecting that the windscreen of indoor fan changes the second gear into from the first gear, when the windscreen that indoor fan detected changes, in the process of the 7th scheduled time m3 of compressor operating, do not detect the pipe temperature H in indoor evaporator, whether m running time that does not also detect compressor reaches the 5th scheduled time m1, that is to say, in the process of the 7th scheduled time m3 of compressor operating, do not judge whether air-conditioner enters defrost phase.
According to the Defrost method of the air-conditioner of the embodiment of the present invention, in the time that the windscreen that indoor fan detected changes, carry out accounting temperature offset by the pipe temperature detecting in indoor evaporator, with to after temperature on the Guan Wen that detects compensate, thereby can to avoid traditional temperature compensation value be the frostless defrosting that causes of constant or enter in advance the phenomenons such as defrost state, further ensure that air-conditioner defrosts in the time of frosting state, reduce the frostless defrost situation in air-conditioning heating running, increase effective heating operation time, further improve heating capacity.
In some embodiments of the invention, also comprise the steps:
S9: when detecting that m running time of compressor reaches after the 5th scheduled time m1, whether sensing chamber's inner blower is in stopped status;
S10: when detecting that indoor fan is in the time that stopped status and m running time that compressor detected reach the 6th scheduled time m2; air-conditioner enters defrost phase; in the time detecting that indoor fan is in running order, detect the pipe temperature H of indoor evaporator and compare to determine a maximum H max, enter step S3.That is to say, in the time indoor fan being detected in stopped status, just do not detect the pipe temperature H of indoor evaporator, only need be in the time that m running time that compressor detected reach the 6th scheduled time m2, air-conditioner just enters defrost phase.
According to the Defrost method of the air-conditioner of the embodiment of the present invention; detecting that indoor fan is in the time that stopped status and m running time that compressor detected reach the 6th scheduled time m2; air-conditioner enters into defrost state; further ensure that air-conditioner defrosts in the time of frosting state; reduce the frostless defrost situation in air-conditioning heating running; increase effective heating operation time, further improved heating capacity.
In some embodiments of the invention, when air-conditioner is start or when translative mode again after powering on first, shutting down, only need be in the time that m running time that compressor detected reaches the 6th scheduled time m2, just enter into defrost phase, thereby can guarantee that the frost on outdoor condenser can not exist for a long time, to avoid causing frost to become the adverse consequences of ice.
According to some embodiments of the present invention, in defrost phase, when air-conditioner shuts down or detects that air-conditioner is converted to non-heating mode, defrost finishes.And what deserves to be explained is, air-conditioner has the defrost tenth skill of certain hour after defrost finishes, and air-conditioner of the present invention is in defrost tenth skill, and the action of compressor is not subject to the restriction of three minutes delay protections.Meanwhile, in the defrost stage, air-conditioner does not detect for detection of the sensor of indoor evaporator whether have fault.
, if being all known for those of ordinary skills, electric-controlled box etc. and operation be not described in detail here according to other configuration examples of the air-conditioner of the embodiment of the present invention.
In the description of this description, the description of reference term " embodiment ", " some embodiment ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, amendment, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.

Claims (14)

1. a Defrost method for air-conditioner, described air-conditioner comprises outdoor condenser and compressor, it is characterized in that, comprises the steps:
S1: described air-conditioner enters heating mode, detects M running time of described compressor;
S2: when detecting that M running time of described compressor reaches after the first scheduled time M1, detect the pipe temperature T on described outdoor condenser and compare to determine a maximum of T max;
S3: the maximum of T in detecting step S2 maxt DEG C of needed time t of every reduction △, and by described time t and the first predetermined value tt 1with the second predetermined value tt 2compare;
S4: work as tt 1<t<tt 2time and M running time of described compressor while reaching the second scheduled time M2, described air-conditioner enters defrost phase; As t>=tt 2or t≤tt 1time, get back to step S3;
S5: in described defrost phase, in the time that described air-conditioner has moved defrost time D T or detected that signal is exited in defrost, defrost finishes, and gets back to step S1, so circulation.
2. the Defrost method of air-conditioner according to claim 1, is characterized in that, also comprises the steps:
S6: by the maximum of T in step S2 maxcompare with the difference △ T1 of Ts and setting value TC2, wherein Ts is the minimum temperature that the temperature sensor of detector tube temperature T can accurate detection;
S7: in the time that difference △ T1 is less than setting value TC2 and being continued until and detects that M running time of described compressor reaches the second scheduled time M2, described air-conditioner enters defrost phase.
3. the Defrost method of air-conditioner according to claim 1 and 2, is characterized in that, described defrost is exited signal and is more than or equal to setting value TC4 for described pipe temperature T being detected.
4. the Defrost method of air-conditioner according to claim 1, is characterized in that, in described defrost phase, when described air-conditioner shuts down or detects that described air-conditioner is converted to non-heating mode, defrost finishes.
5. the Defrost method of air-conditioner according to claim 1, is characterized in that, the scope of described △ T DEG C is 0.5 DEG C-3 DEG C, described the first scheduled time tt 1be 1 minute, described the second predetermined value tt 2it is 20 minutes.
6. the Defrost method of air-conditioner according to claim 5, is characterized in that, described △ T DEG C is 1 DEG C.
7. a Defrost method for air-conditioner, described air-conditioner comprises indoor fan, indoor evaporator and compressor, it is characterized in that, comprises the steps:
S1: described air-conditioner enters heating mode, detects the m and the windscreen of described indoor fan running time of described compressor;
S2: when detecting that m running time of described compressor reaches after the 5th scheduled time m1, detect the pipe temperature H of described indoor evaporator and compare to determine a maximum H max;
S3: the maximum H in detecting step S2 maxh DEG C of needed time N of every reduction △, and by described time N and the 3rd predetermined value NN 1with the 4th predetermined value NN 2compare;
S4: when occurring NN 1<N<NN 2and when m running time of described compressor reaches the 6th scheduled time m2, described air-conditioner enters defrost phase; As N>=NN 2or N≤NN 1time, get back to step S3;
S5: in described defrost phase, in the time that described air-conditioner has moved defrost time D DT or detected that signal is exited in defrost, defrost finishes, and gets back to step S1, so circulation.
8. the Defrost method of air-conditioner according to claim 7, is characterized in that, when NN appears in continuous several times in described step S4 1<N<NN 2and when m running time of described compressor reaches the 6th scheduled time m2, described air-conditioner enters defrost phase.
9. the Defrost method of air-conditioner according to claim 7, is characterized in that, also comprises the steps:
S6: in the time detecting that the windscreen of described indoor fan changes the second gear into from the first gear, detect from described the first gear and change the pipe temperature H11 the described indoor evaporator in variation moment of described the second gear into;
S7: detecting after described compressor operating the 7th scheduled time m3, detecting the pipe temperature H12 in described indoor evaporator, pipe temperature H12 and H11 are compared to obtain temperature compensation value △ H1=H12-H11;
S8: when detecting that m running time of described compressor reaches after the 5th scheduled time m1, detect the pipe temperature H in described indoor evaporator, and described Guan Wen is calculated to compensation temperature H-△ H1 through temperature-compensating, described compensation temperature is compared to determine a maximum H max, enter step S3.
10. the Defrost method of air-conditioner according to claim 7, is characterized in that, also comprises the steps:
S9: when detecting that whether m running time of described compressor reaches after the 5th scheduled time m1, detect described indoor fan in stopped status;
S10: when detecting that described indoor fan is in the time that stopped status and m running time that described compressor detected reach the 6th scheduled time m2; described air-conditioner enters defrost phase; in the time detecting that described indoor fan is in running order, detect the pipe temperature H of described indoor evaporator and compare to determine a maximum H max, enter step S3.
11. according to the Defrost method of the air-conditioner described in any one in claim 7-10, it is characterized in that, it is that the running current that described compressor detected is more than or equal to predetermined current value that signal is exited in described defrost.
The Defrost method of 12. air-conditioners according to claim 7, is characterized in that, in described defrost phase, when described air-conditioner shuts down or detects that described air-conditioner is converted to non-heating mode, defrost finishes.
The Defrost method of 13. air-conditioners according to claim 7, is characterized in that, the scope of described △ H DEG C is 0.5 DEG C-3 DEG C, described the 3rd scheduled time NN 1be 1 minute, described the 4th predetermined value NN 2it is 20 minutes.
The Defrost method of 14. air-conditioners according to claim 13, is characterized in that, described △ H DEG C is 1 DEG C.
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CN109539386A (en) * 2018-11-07 2019-03-29 南通鸿亨热控科技有限公司 A kind of anti-freeze defroster of floor air conditioner
CN110207316A (en) * 2019-06-19 2019-09-06 宁波奥克斯电气股份有限公司 Defrosting control method, device and air conditioner
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