CN111141006A - Control method and control device for defrosting of air conditioner, storage medium and air conditioner - Google Patents
Control method and control device for defrosting of air conditioner, storage medium and air conditioner Download PDFInfo
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- CN111141006A CN111141006A CN201911397882.9A CN201911397882A CN111141006A CN 111141006 A CN111141006 A CN 111141006A CN 201911397882 A CN201911397882 A CN 201911397882A CN 111141006 A CN111141006 A CN 111141006A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
Abstract
The invention provides a control method and a control device for defrosting of an air conditioner, a storage medium and the air conditioner, wherein the control method comprises the following steps: when the air conditioner operates in the heating mode, according to the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unitInner discWhether a preset condition is met or not is judged, and whether the air conditioner enters a defrosting mode or not is controlled; when the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal machineInner discAnd after the air conditioner meets the preset conditions and the air conditioner meets the defrosting entering conditions, controlling the air conditioner to enter a defrosting mode. The invention relates to aExcessive high pressure decay Rate, high pressure decay amount, and inner machine coil temperature TInner discThe comprehensive judgment is carried out, the air conditioner can be effectively prevented from entering a defrosting mode under the condition of no frost or a thin frost layer, and the heating effect of the air conditioner is prevented from being influenced.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and a control device for defrosting of an air conditioner, a storage medium and the air conditioner.
Background
When the air conditioner is operated in a low-temperature environment for heating, when the surface temperature of an outer machine heat exchanger is below zero and is lower than the dew-point temperature of ambient air, a frosting phenomenon can occur, the heating effect of the air conditioner is influenced, in order not to influence the heating effect of the air conditioner in the prior art, the air conditioner is usually defrosted, and if the air conditioner is defrosted periodically through the temperature of an outer machine coil and the heating time.
In the above defrosting method, there is a problem that defrosting is performed even in a state where there is no frost or slight frost, and further, a heating effect of the air conditioner is affected, and a use comfort of a user is affected.
Disclosure of Invention
In order to solve at least one problem, the invention provides a control method for defrosting of an air conditioner, which comprises the following steps:
when the air conditioner operates in the heating mode, according to the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unitInner discWhether a preset condition is met or not is judged, and whether the air conditioner enters a defrosting mode or not is controlled;
when the high pressure attenuation rate, the high pressure attenuation amount and the inner machine coil temperature T of the air conditioner are all measuredInner discAnd after the air conditioner meets the preset conditions and the air conditioner meets the defrosting entering conditions, controlling the air conditioner to enter a defrosting mode.
By adopting the technical scheme, the invention passes through the high-pressure attenuation rate, the high-pressure attenuation quantity and the temperature T of the coil pipe of the internal machineInner discPerforming comprehensive judgment, and judging when the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unitInner discAfter the air conditioner meets the preset conditions and the air conditioner meets the defrosting entering conditions, the air conditioner is controlled to enter a defrosting mode; particularly, the thickness of a frost layer can be reflected through a high-pressure attenuation rate and a high-pressure attenuation amount, and the temperature T of an inner machine coil pipe is measuredInner discThe indoor air outlet temperature can be reflected, whether the air conditioner defrosts or not is determined according to the thickness of the frost layer and the indoor air outlet temperature, and defrosting entering strips are met in the air conditionerAfter the piece, control air conditioner entering defrosting mode and change the frost, this kind of mode can effectually avoid the air conditioner to get into the mode of changing the frost under the condition that no frost or frost layer is thinner, avoids influencing the effect of heating of air conditioner.
Optionally, the preset conditions include:
the high-pressure attenuation rate of the air conditioner is greater than a preset attenuation rate;
the high-pressure attenuation of the air conditioner is greater than a preset attenuation;
temperature T of coil pipe of inner machine of air conditionerInner discLess than or equal to a first preset temperature T1；
When the high-pressure attenuation rate of the air conditioner is greater than the preset attenuation rate, the high-pressure attenuation amount of the air conditioner is greater than the preset attenuation amount, and when the temperature T of the coil pipe of the internal machine is higher than the preset attenuation amountInner discLess than or equal to the first preset temperature T1And then, controlling the air conditioner to enter the defrosting mode.
In this way, when the high-pressure attenuation rate is greater than the preset attenuation rate, the outer machine heat exchanger is in a rapid frosting stage, the high-pressure capacity is attenuated violently, and then the frost layer is thicker; when the high-pressure attenuation is larger than the preset attenuation and is larger than the preset attenuation, the frost layer is in a thicker state; when the temperature T of the coil pipe of the internal machineInner discLess than or equal to a first preset temperature T1When the temperature is too low, the indoor temperature is already low; when the high-pressure attenuation rate, the high-pressure attenuation amount and the temperature T of the coil pipe of the internal machineInner discAfter the preset conditions are met, the frost layer is indicated to be limited, if the defrosting is not carried out in time, the air conditioner is controlled to enter a defrosting mode, the heat exchange effect of the air conditioner is seriously affected, and therefore the air conditioner needs to be controlled to enter the defrosting mode to defrost.
Optionally, after the high-pressure attenuation rate of the air conditioner is greater than the preset attenuation rate, it is determined whether the high-pressure attenuation of the air conditioner is greater than the preset attenuation, and the temperature T of the indoor unit coilInner discWhether or not it is less than or equal to the first preset temperature T1；
When the high-pressure attenuation of the air conditioner is larger than the preset attenuation and the temperature T of the coil pipe of the internal machineInner discLess than or equal to the first preset temperature T1And then, controlling the air conditioner to enter the defrosting mode.
In the mode, the preset condition of the high-pressure attenuation rate is judged firstly, and then the high-pressure attenuation quantity and the temperature T of the coil pipe of the internal machine are judgedInner discThe preset condition is judged, the trend that the frost layer is gradually thickened can be judged through the high-pressure attenuation rate, and then the high-pressure attenuation quantity and the temperature T of the inner machine coil pipe are used for judgingInner discJudging the state that the frost layer reaches the limit, and further controlling the air conditioner to enter a defrosting mode;
optionally, the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unit are determinedInner discBefore the step of controlling whether the air conditioner enters a defrosting mode or not according to whether a preset condition is met, the control method comprises the following steps of:
detecting the high pressure P of the air conditioner and judging whether the high pressure P is the maximum value P of the high pressuremax；
When the high pressure P is the maximum value P of the high pressuremaxThen, the high voltage attenuation rate and the high voltage attenuation amount are calculated.
In this way, after the high pressure P reaches the peak value in the stable stage when frost layer appears in the outer machine heat exchanger, the invention firstly judges whether the high pressure P is the maximum value P of the high pressuremaxWhen the high pressure P is the maximum value P of the high pressuremaxAnd then, the high-voltage attenuation rate and the high-voltage attenuation amount are calculated, so that the probability of misjudgment can be effectively reduced, and the judgment accuracy is improved.
Optionally, the step of calculating the high voltage attenuation rate and the high voltage attenuation amount includes the following steps:
detecting the high pressure P in the ith detection periodiAnd the high pressure P in the i + m adjacent detection periodsi+m；
According to said high pressure PiThe high pressure Pi+mAnd said high pressure maximum value PmaxCalculating the high-voltage attenuation rate and the high-voltage attenuation amount;
wherein the high voltage attenuation rate is
The high voltage attenuation is
In this way, according to the high pressure PiHigh pressure Pi+mAnd a maximum value P of the high pressuremaxThe high-pressure attenuation rate and the high-pressure attenuation amount are calculated, and the thickness of the frost layer can be effectively judged.
Optionally, the step of calculating the high voltage attenuation rate and the high voltage attenuation amount includes the following steps:
detecting and calculating a high-pressure average value P 'in the ith detection period'iAnd a high-pressure average value P 'in the adjacent (i + m) th detection period'i+m；
According to the high pressure P'iAnd the high pressure P'i+mAnd said high pressure maximum value PmaxCalculating the high-voltage attenuation rate and the high-voltage attenuation amount;
wherein the high voltage attenuation rate is
The high voltage attenuation is
In this way, according to the high-pressure mean value P'iHigh pressure mean value P'i+mAnd a maximum value P of the high pressuremaxThe high-pressure attenuation rate and the high-pressure attenuation amount are calculated, the thickness of the frost layer can be effectively judged, and meanwhile, the possibility of misjudgment possibly caused by single detection can be effectively reduced through the high-pressure average value.
Optionally, the "the air conditioner satisfies a defrosting entry condition" includes the following steps:
judging the temperature T of the coil pipe of the air conditionerOuter plateAt a first preset time t1Whether or not it is continuously less than the second preset temperature T2；
Judging the running time t of the air conditioner in the heating modeHeating apparatusWhether it is greater than the second preset time t2；
When the temperature T of the coil pipe of the outer unit of the air conditionerOuter plateAt the first preset time t1Continuously lower than the second preset temperature T2And the operation time t of the air conditioner in the heating modeHeating apparatusIs greater than the second preset time t2And then, controlling the air conditioner to enter the defrosting mode.
In this way, the high-pressure attenuation rate, the high-pressure attenuation amount and the inner machine coil temperature T of the air conditionerInner discAfter the air conditioner meets the preset conditions, whether the air conditioner meets defrosting entering conditions or not is judged, namely the temperature T of the external machine coil pipe is judgedOuter plateAnd operating time t in heating modeHeating apparatusThe judgment of (3) can effectively eliminate the influence of abnormal conditions and increase the accuracy of judgment.
The invention provides a control device of an air conditioner, which executes any one of the control methods; the control device includes:
a judging unit: the first judgment unit is used for judging whether the air conditioner operates in the heating mode or not according to the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unit when the air conditioner operates in the heating modeInner discWhether a preset condition is met or not is judged, and whether the air conditioner enters a defrosting mode or not is controlled;
a control unit: the control unit is used for controlling the high-pressure attenuation rate, the high-pressure attenuation amount and the temperature T of the inner machine coil pipe of the air conditionerInner discAnd after the air conditioner meets the preset conditions and the defrosting entering conditions, controlling the air conditioner to enter a defrosting mode.
The present invention provides a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements a control method as in any one of the above.
The invention provides an air conditioner which executes any one of the control methods.
Drawings
Fig. 1 is a flowchart of a control method of an air conditioner according to embodiment 1 of the present invention;
fig. 2 is a flowchart of a control method of an air conditioner according to embodiment 2 of the present invention;
fig. 3 is a first flowchart of a control method of an air conditioner according to embodiment 3 of the present invention;
fig. 4 is a second flowchart of a control method of an air conditioner in embodiment 3 of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The invention provides a control method for defrosting of an air conditioner, which specifically comprises the following steps:
the control method comprises the following steps:
when the air conditioner operates in the heating mode, according to the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unitInner discWhether a preset condition is met or not is judged, and whether the air conditioner enters a defrosting mode or not is controlled;
when the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal machineInner discAnd after the air conditioner meets the preset conditions and the air conditioner meets the defrosting entering conditions, controlling the air conditioner to enter a defrosting mode.
When the air conditioner operates in the heating mode, the air conditioner can sequentially comprise a starting stage, a stabilizing stage and an attenuation stage according to the time sequence; in the starting stage, the frequency of the air conditioner is increased, the capacity output is increased, and the high-pressure P is increased; in the stable stage, the air conditioner normally operates to heat, and the high pressure P operates to the maximum value P due to condensed water in the heat exchanger of the external unit and the likemaxThat is, the high pressure P decreases after reaching the peak value, and the capacity output decreases; in the attenuation stage, as the outer machine heat exchanger gradually frosts, the thermal resistance is increased, and the high pressure P and the capacity output are both severely attenuated.
The high-pressure attenuation rate can reflect the frosting rate of the heat exchanger of the outdoor unit; the high-pressure attenuation rate is small, which means that the possible relative humidity is small, the difference between the temperature of the outer machine coil and the temperature of the outer ring is small, and the frosting is slow; the high pressure attenuation rate indicates that the possible relative humidity is high, the difference between the temperature of the outer machine coil and the temperature of the outer ring is large, and the frosting is fast;
the high-pressure attenuation quantity can reflect the frost layer thickness of the outdoor unit heat exchanger; the low high-pressure attenuation amount indicates that the thickness of the frost layer is relatively thin, and the high-pressure attenuation amount indicates that the thickness of the frost layer is relatively thick;
the temperature of the coil of the inner machine can represent the heating effect of the inner machine; the coil pipe temperature of the inner machine is high, the inner machine blows hot air, and the heating effect is good; the coil pipe temperature of the inner machine is low, and the inner machine blows out cold air, so that the heating effect is poor;
the invention passes through the high-pressure attenuation rate, the high-pressure attenuation quantity and the temperature T of the coil pipe of the internal machineInner discPerforming comprehensive judgment, and judging when the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unitInner discAfter all meet the preset conditions, the air conditioner meets the requirementsControlling the air conditioner to enter a defrosting mode only after defrosting enters conditions; particularly, the thickness of a frost layer can be reflected through a high-pressure attenuation rate and a high-pressure attenuation amount, and the temperature T of an inner machine coil pipe is measuredInner discCan reflect indoor air-out temperature, and then according to the thickness on frost layer and indoor air-out temperature, confirm whether the air conditioner changes the frost, after the air conditioner satisfied the condition of changing the frost and get into, control the air conditioner and get into the mode of changing the frost and change the frost, this kind of mode can effectually avoid the air conditioner to get into the mode of changing the frost under the condition that no frost or frost layer is thinner, avoids influencing the effect of heating of air conditioner.
The high-pressure refers to the pressure in a high-pressure section in the air conditioner, and the pressure is approximately in a pipeline between a compressor exhaust pipe and an outer machine heat exchanger.
In some embodiments, the preset conditions include:
the high-pressure attenuation rate of the air conditioner is greater than the preset attenuation rate;
the high-pressure attenuation of the air conditioner is greater than the preset attenuation;
indoor unit coil pipe temperature T of air conditionerInner discLess than or equal to a first preset temperature T1；
When the high-pressure attenuation rate of the air conditioner is greater than the preset attenuation rate, the high-pressure attenuation amount of the air conditioner is greater than the preset attenuation amount, and when the temperature T of the coil pipe of the internal machine is higher than the preset attenuation amountInner discLess than or equal to a first preset temperature T1And then, controlling the air conditioner to enter a defrosting mode.
In this way, when the high-pressure attenuation rate is greater than the preset attenuation rate, the outer machine heat exchanger is in a rapid frosting stage, the high-pressure capacity is attenuated violently, and then the frost layer is thicker; when the high-pressure attenuation is larger than the preset attenuation and is larger than the preset attenuation, the frost layer is in a thicker state; when the temperature T of the coil pipe of the internal machineInner discLess than or equal to a first preset temperature T1When the temperature is too low, the indoor temperature is already low; when the high-pressure attenuation rate, the high-pressure attenuation amount and the temperature T of the coil pipe of the internal machineInner discAfter the preset conditions are met, the frost layer is indicated to be limited, if the defrosting is not carried out in time, the air conditioner is controlled to enter a defrosting mode, the heat exchange effect of the air conditioner is seriously affected, and therefore the air conditioner needs to be controlled to enter the defrosting mode to defrost.
Wherein, the range of the preset attenuation rate is 1-10 per mill, preferably 5 per mill;
the value range of the preset attenuation is 15-50%, and 20% is preferred;
preferably, after the high-pressure attenuation rate of the air conditioner is greater than the preset attenuation rate, whether the high-pressure attenuation amount of the air conditioner is greater than the preset attenuation amount or not and the temperature T of the coil pipe of the internal unit are judgedInner discWhether or not less than or equal to a first preset temperature T1；
When the high-pressure attenuation of the air conditioner is larger than the preset attenuation and the temperature T of the coil pipe of the internal machineInner discLess than or equal to a first preset temperature T1And then, controlling the air conditioner to enter a defrosting mode.
In the mode, the preset condition of the high-pressure attenuation rate is judged firstly, and then the high-pressure attenuation quantity and the temperature T of the coil pipe of the internal machine are judgedInner discThe preset condition is judged, the trend that the frost layer is gradually thickened can be judged through the high-pressure attenuation rate, and then the high-pressure attenuation quantity and the temperature T of the inner machine coil pipe are used for judgingInner discJudging the state that the frost layer reaches the limit, and further controlling the air conditioner to enter a defrosting mode;
wherein the first preset temperature T1The value range of (A) is 25-40 ℃, and preferably 30 ℃.
In some embodiments, the high pressure decay rate, the high pressure decay amount, and the internal machine coil temperature T "according to the air conditionerInner discBefore the step of controlling whether the air conditioner enters a defrosting mode or not and whether the preset condition is met or not, the control method comprises the following steps of:
detecting the high pressure P of the air conditioner and judging whether the high pressure P is the maximum value P of the high pressuremax；
When the high-pressure P is the maximum value P of the high-pressuremaxThen, the high voltage attenuation rate and the high voltage attenuation amount are calculated.
In this way, after the high pressure P reaches the peak value in the stable stage when frost layer appears in the outer machine heat exchanger, the invention firstly judges whether the high pressure P is the maximum value P of the high pressuremaxWhen the high pressure P is the maximum value of the high pressurePmaxAnd then, the high-voltage attenuation rate and the high-voltage attenuation amount are calculated, so that the probability of misjudgment can be effectively reduced, and the judgment accuracy is improved.
In some embodiments, "calculating the high pressure decay rate and the high pressure decay amount" comprises the steps of:
detecting the high pressure P in the ith detection periodiAnd the high pressure P in the i + m adjacent detection periodsi+m；
According to high pressure PiHigh pressure Pi+mAnd a maximum value P of the high pressuremaxCalculating a high-voltage attenuation rate and a high-voltage attenuation amount;
wherein the high voltage attenuation rate is
High voltage attenuation of
In this way, according to the high pressure PiHigh pressure Pi+mAnd a maximum value P of the high pressuremaxThe high-pressure attenuation rate and the high-pressure attenuation amount are calculated, and the thickness of the frost layer can be effectively judged.
In some embodiments, "calculating the high pressure decay rate and the high pressure decay amount" comprises the steps of:
detecting and calculating a high-pressure average value P 'in the ith detection period'iAnd a high-pressure average value P 'in the adjacent (i + m) th detection period'i+m；
According to high pressure mean value P'iHigh pressure mean value P'i+mAnd a maximum value P of the high pressuremaxCalculating a high-voltage attenuation rate and a high-voltage attenuation amount;
wherein the high voltage attenuation rate is
High voltage attenuation of
In this way, according to the high-pressure mean value P'iHigh pressure mean value P'i+mAnd a maximum value P of the high pressuremaxThe high-pressure attenuation rate and the high-pressure attenuation amount are calculated, the thickness of the frost layer can be effectively judged, and meanwhile, the possibility of misjudgment possibly caused by single detection can be effectively reduced through the high-pressure average value.
In the above, the "detection period" refers to a time interval between two adjacent detections of the high pressure P, or a high pressure average value P is calculated after the high pressure P is detected in real timeiThe time interval of (c); the value range of the detection period is as follows: 30s to 90s, preferably 40 s;
wherein i is a constant greater than 0; m is a constant of 1 or more;
in the present invention, the defrosting entry condition may be a defrosting entry condition in the prior art, for example, the defrosting entry condition is determined according to an external loop temperature, an indoor air outlet temperature, and the like, in some embodiments, the preferable defrosting entry condition is as follows, wherein the "air conditioner satisfies the defrosting entry condition" includes the following steps:
judging temperature T of outdoor unit coil of air conditionerOuter plateAt a first preset time t1Whether or not it is continuously less than the second preset temperature T2；
Judging the operation time t of the air conditioner in the heating modeHeating apparatusWhether it is greater than the second preset time t2；
When the temperature T of the coil pipe of the outdoor unit of the air conditionerOuter plateAt a first preset time t1Continuously lower than a second preset temperature T2And the operation time t of the air conditioner in the heating modeHeating apparatusIs more than the second preset time t2And then, controlling the air conditioner to enter a defrosting mode.
In this way, the high-pressure attenuation rate, the high-pressure attenuation amount and the inner machine coil temperature T of the air conditionerInner discAfter the air conditioner meets the preset conditions, the air conditioner is judged whether to meet defrosting entry conditions, namely the temperature of an external machine coil pipeTOuter plateAnd operating time t in heating modeHeating apparatusThe judgment can effectively eliminate the influence of abnormal conditions and increase the judgment accuracy;
wherein the first preset time t1The value range of (A) is 30min-60 min;
second predetermined temperature T2The value range of (A) is-30-15 ℃;
second preset time t2The value range of (A) is 50min-60 min;
example 1
The present invention provides an embodiment of a method for controlling air conditioner defrosting, it should be noted that the steps shown in the flowchart of the figure can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from the order shown.
As shown in fig. 1, the control method includes the steps of:
s1, judging whether the air conditioner operates in the heating mode;
s2, detecting the high pressure P in real time or every detection period when the air conditioner operates in the heating mode;
s3, judging whether the high pressure P is the maximum value Pmax；
S4, when the high-pressure P is the maximum value P of the high-pressuremaxThen, the high-pressure P in the ith detection period is detectedi；
S5, detecting the high-pressure P in the i + m adjacent detection periodsi+m；
S6 according to the formula
Calculating a high-voltage attenuation rate;
s7, judging whether the high-pressure attenuation rate is greater than a preset attenuation rate;
s8 according to the formula
Calculating a high-voltage attenuation amount;
s9, judging whether the high-pressure attenuation is larger than a preset attenuation or not;
s10, detecting the temperature T of the coil pipe of the internal machine in real timeInner discOr detecting the temperature T of the coil pipe of the internal machine at intervals of a detection periodInner disc；
S11, judging the temperature T of the coil pipe of the internal machineInner discWhether or not less than or equal to a first preset temperature T1；
S12, when the high-pressure attenuation rate is larger than the preset attenuation rate, the high-pressure attenuation amount of the air conditioner is larger than the preset attenuation amount, and when the temperature T of the coil pipe of the internal machine is higher than the preset attenuation amountInner discLess than or equal to a first preset temperature T1And then, controlling the air conditioner to enter a defrosting mode after the air conditioner meets defrosting entering conditions.
Example 2
The present invention provides an embodiment of a method for controlling air conditioner defrosting, it should be noted that the steps shown in the flowchart of the figure can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from the order shown.
As shown in fig. 2, the control method includes the steps of:
s1, judging whether the air conditioner operates in the heating mode;
s2, detecting the high pressure P in real time or every detection period when the air conditioner operates in the heating mode;
s3, judging whether the high pressure P is the maximum value Pmax；
S4, when the high-pressure P is the maximum value P of the high-pressuremaxThen, the high pressure P in the ith detection period is detected in real timeiAnd calculating a high pressure average value P 'in the ith detection period'i；
S5, detecting the high-pressure P in the adjacent (i + m) th detection period in real timei+mAnd calculating a high-pressure average value P 'in the (i + m) th detection period'i+m；
S6 according to the formula
Calculating a high-voltage attenuation rate;
s7, judging whether the high-pressure attenuation rate is greater than a preset attenuation rate;
s8 according to the formula
Calculating a high-voltage attenuation amount;
s9, judging whether the high-pressure attenuation is larger than a preset attenuation or not;
s10, detecting the temperature T of the coil pipe of the internal machine in real timeInner discOr detecting the temperature T of the coil pipe of the internal machine at intervals of a detection periodInner disc；
S11, judging the temperature T of the coil pipe of the internal machineInner discWhether or not less than or equal to a first preset temperature T1；
S12, when the high-pressure attenuation rate is larger than the preset attenuation rate, the high-pressure attenuation amount of the air conditioner is larger than the preset attenuation amount, and when the temperature T of the coil pipe of the internal machine is higher than the preset attenuation amountInner discLess than or equal to a first preset temperature T1And then, controlling the air conditioner to enter a defrosting mode after the air conditioner meets defrosting entering conditions.
Example 3
As shown in fig. 3 to 4, the present embodiment is based on embodiment 1 and embodiment 2, and the control method includes the following steps between step S11 and step S12:
s13, detecting the temperature T of the coil pipe of the external unitOuter plate；
S14, judging the temperature T of the coil pipe of the external unitOuter plateAt a first preset time t1Whether or not it is continuously less than the second preset temperature T2；
S15, detecting the operation time t of the air conditioner in the heating modeHeating apparatus；
S16, judging the operation time t of the air conditioner in the heating modeHeating apparatusWhether it is greater than the second preset time t2；
When the temperature T of the coil pipe of the outdoor unit of the air conditionerOuter plateAt a first preset time t1Internal continuous less thanSecond predetermined temperature T2And the operation time t of the air conditioner in the heating modeHeating apparatusIs more than the second preset time t2And then, controlling the air conditioner to enter a defrosting mode.
Example 4
The present invention provides a control device for an air conditioner, which executes the control method of one of the above embodiments 1 to 3, the control device including:
a judging unit: the first judging unit is used for judging the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unit when the air conditioner operates in the heating modeInner discWhether a preset condition is met or not is judged, and whether the air conditioner enters a defrosting mode or not is controlled;
a control unit: the control unit is used for controlling the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unitInner discAnd after the air conditioner meets the preset conditions and the air conditioner meets the defrosting entering conditions, controlling the air conditioner to enter a defrosting mode.
Example 5
The present invention provides a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements the control method of one of embodiments 1 to 3.
Example 6
The present invention provides an air conditioner that performs the control method of one of embodiments 1 to 3.
Example 7
The invention provides a multi-split air conditioning system which comprises the air conditioner.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A control method for defrosting of an air conditioner is characterized by comprising the following steps: the control method comprises the following steps:
when the air conditioner is operated in the heating mode,according to the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unitInner discWhether a preset condition is met or not is judged, and whether the air conditioner enters a defrosting mode or not is controlled;
when the high pressure attenuation rate, the high pressure attenuation amount and the inner machine coil temperature T of the air conditioner are all measuredInner discAnd after the air conditioner meets the preset conditions and the air conditioner meets the defrosting entering conditions, controlling the air conditioner to enter a defrosting mode.
2. The control method according to claim 1, characterized in that: the preset conditions include:
the high-pressure attenuation rate of the air conditioner is greater than a preset attenuation rate;
the high-pressure attenuation of the air conditioner is greater than a preset attenuation;
temperature T of coil pipe of inner machine of air conditionerInner discLess than or equal to a first preset temperature T1；
When the high-pressure attenuation rate of the air conditioner is greater than the preset attenuation rate, the high-pressure attenuation amount of the air conditioner is greater than the preset attenuation amount, and when the temperature T of the coil pipe of the internal machine is higher than the preset attenuation amountInner discLess than or equal to the first preset temperature T1And then, controlling the air conditioner to enter the defrosting mode.
3. The control method according to claim 2, characterized in that: when the high-pressure attenuation rate of the air conditioner is greater than the preset attenuation rate, judging whether the high-pressure attenuation amount of the air conditioner is greater than the preset attenuation amount or not and judging the temperature T of the coil pipe of the internal unitInner discWhether or not it is less than or equal to the first preset temperature T1；
When the high-pressure attenuation of the air conditioner is larger than the preset attenuation and the temperature T of the coil pipe of the internal machineInner discLess than or equal to the first preset temperature T1And then, controlling the air conditioner to enter the defrosting mode.
4. The control method according to claim 1, characterized in that: at the rootAccording to the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal machineInner discBefore the step of controlling whether the air conditioner enters a defrosting mode or not according to whether a preset condition is met, the control method comprises the following steps of:
detecting the high pressure P of the air conditioner and judging whether the high pressure P is the maximum value P of the high pressuremax；
When the high pressure P is the maximum value P of the high pressuremaxThen, the high voltage attenuation rate and the high voltage attenuation amount are calculated.
5. The control method according to claim 4, characterized in that: the "calculating the high pressure attenuation rate and the high pressure attenuation amount" includes the steps of:
detecting the high pressure P in the ith detection periodiAnd the high pressure P in the i + m adjacent detection periodsi+m；
According to said high pressure PiThe high pressure Pi+mAnd said high pressure maximum value PmaxCalculating the high-voltage attenuation rate and the high-voltage attenuation amount;
wherein the high voltage attenuation rate is
The high voltage attenuation is
6. The control method according to claim 4, characterized in that: the "calculating the high pressure attenuation rate and the high pressure attenuation amount" includes the steps of:
detecting and calculating a high-pressure average value P 'in the ith detection period'iAnd a high-pressure average value P 'in the adjacent (i + m) th detection period'i+m；
According to the high pressure P'iAnd the high pressure P'i+mAnd said high pressure maximum value PmaxCalculating the high-voltage attenuation rate and the high-voltage attenuation amount;
wherein the high voltage attenuation rate is
The high voltage attenuation is
7. The control method according to claim 1, characterized in that: the air conditioner meeting defrosting entry conditions comprises the following steps:
judging the temperature T of the coil pipe of the air conditionerOuter plateAt a first preset time t1Whether or not it is continuously less than the second preset temperature T2；
Judging the running time t of the air conditioner in the heating modeHeating apparatusWhether it is greater than the second preset time t2；
When the temperature T of the coil pipe of the outer unit of the air conditionerOuter plateAt the first preset time t1Continuously lower than the second preset temperature T2And the operation time t of the air conditioner in the heating modeHeating apparatusIs greater than the second preset time t2And then, controlling the air conditioner to enter the defrosting mode.
8. A control device of an air conditioner is characterized in that: performing the control method of any one of claims 1-7; the control device includes:
a judging unit: the first judgment unit is used for judging whether the air conditioner operates in the heating mode or not according to the high-pressure attenuation rate and the high-pressure attenuation quantity of the air conditioner and the temperature T of the coil pipe of the internal unit when the air conditioner operates in the heating modeInner discWhether a preset condition is met or not is judged, and whether the air conditioner enters a defrosting mode or not is controlled;
a control unit: the control unitFor controlling the high pressure attenuation rate, the high pressure attenuation amount and the inner machine coil temperature T of the air conditionerInner discAnd after the air conditioner meets the preset conditions and the defrosting entering conditions, controlling the air conditioner to enter a defrosting mode.
9. A computer-readable storage medium characterized by: the computer-readable storage medium stores a computer program which, when read and executed by a processor, implements the control method according to any one of claims 1 to 7.
10. An air conditioner, characterized in that: performing the control method of any one of claims 1-7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114061028A (en) * | 2020-07-31 | 2022-02-18 | 广东美的制冷设备有限公司 | Air conditioner, defrosting method thereof, and computer-readable storage medium |
| CN115247920A (en) * | 2022-06-27 | 2022-10-28 | 浙江中广电器集团股份有限公司 | Defrosting control method for multi-split air conditioner |
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| CN110017583A (en) * | 2019-03-12 | 2019-07-16 | 青岛海尔空调电子有限公司 | Air conditioner and its defrosting control method |
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Application publication date: 20200512 |