CN112923512A - Air conditioner defrosting control method and device and air conditioner - Google Patents
Air conditioner defrosting control method and device and air conditioner Download PDFInfo
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- CN112923512A CN112923512A CN202110146099.6A CN202110146099A CN112923512A CN 112923512 A CN112923512 A CN 112923512A CN 202110146099 A CN202110146099 A CN 202110146099A CN 112923512 A CN112923512 A CN 112923512A
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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
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides an air conditioner defrosting control method, an air conditioner defrosting control device and an air conditioner, wherein the method comprises the following steps: if the temperature of the outer coil of the air conditioner is reduced to be not higher than the first temperature threshold, acquiring the average change rate of the target resistance value during the period that the temperature of the outer coil is reduced from the second temperature threshold to the first temperature threshold; acquiring a target rotating speed of an outer fan of the air conditioner and/or a target operating frequency of a compressor of the air conditioner according to the average change rate of the target resistance value; controlling the outer fan and the compressor to defrost according to the target rotating speed of the outer fan and/or the target operating frequency of the compressor; the target resistance value is a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner. According to the air conditioner defrosting control method and device and the air conditioner, the rotating speed of the outer fan and/or the operating frequency of the compressor during defrosting can be automatically adjusted according to the current frosting thickness of the condenser, defrosting can be carried out more quickly, and the defrosting period can be shortened.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner defrosting control method and device and an air conditioner.
Background
The air conditioner operates in a heating mode under a low-temperature working condition, a condenser can frost in the heating process, a frost layer gradually becomes thick, and the heating effect of the air conditioner is influenced.
In the existing defrosting method of the air conditioner, a compressor of the air conditioner generally performs defrosting at a preset frequency. When outdoor temperature is extremely low, or humidity is very big, outer machine frosting is very thick, and defrosting time is longer, influences complete machine heating capacity, and user's comfort nature experience is poor.
Disclosure of Invention
The invention provides an air conditioner defrosting control method, an air conditioner defrosting control device and an air conditioner, which are used for solving the defect that the defrosting time of the air conditioner is longer under the condition of thick frosting in the prior art and realizing the faster defrosting of the air conditioner under the condition of thick frosting.
The invention provides an air conditioner defrosting control method, which comprises the following steps:
if the temperature of an external coil of the air conditioner is reduced to be not higher than a first temperature threshold value, acquiring the average change rate of a target resistance value during the period that the temperature of the external coil is reduced from a second temperature threshold value to the first temperature threshold value;
acquiring a target rotating speed of an outer fan of the air conditioner and/or a target operating frequency of a compressor of the air conditioner according to the average change rate of the target resistance value;
controlling the outer fan and the compressor to defrost according to the target rotating speed of the outer fan and/or the target operating frequency of the compressor;
the target resistance value is a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner.
According to the defrosting control method for the air conditioner provided by the invention, the specific step of acquiring the average change rate of the target resistance value during the period that the temperature of the external coil is reduced from the second temperature threshold value to the first temperature threshold value comprises the following steps:
respectively obtaining a target resistance value when the temperature of the external coil pipe is reduced to the second temperature threshold value and a target resistance value when the temperature of the external coil pipe is continuously reduced to the first temperature threshold value, and obtaining the total operation time of a compressor of the air conditioner during the period that the temperature of the external coil pipe is reduced from the second temperature threshold value to the first temperature threshold value;
and acquiring the average change rate of the target resistance value according to the target resistance value when the temperature of the outer coil pipe is reduced to the second temperature threshold value, the target resistance value when the temperature of the outer coil pipe is continuously reduced to the first temperature threshold value and the total running time.
According to the defrosting control method for the air conditioner, the specific step of acquiring the target rotating speed of the outer fan of the air conditioner and/or the target operating frequency of the compressor of the air conditioner according to the average change rate of the target resistance value comprises the following steps:
determining a change rate interval to which the average change rate belongs based on a change rate threshold set;
and acquiring the target rotating speed of the outer fan and/or the target operating frequency of the compressor according to the change rate interval to which the average change rate belongs.
According to the defrosting control method for the air conditioner, the specific step of acquiring the target operation frequency of the compressor according to the change rate interval to which the average change rate belongs comprises the following steps:
acquiring a first multiple corresponding to the change rate interval to which the average change rate belongs based on the corresponding relation between the change rate interval and the first multiple;
and acquiring the target rotating speed of the outer fan according to a preset basic rotating speed, a preset rotating speed adjusting amplitude and a first multiple corresponding to a changing rate interval to which the average changing rate belongs.
According to the defrosting control method for the air conditioner, the specific step of acquiring the target operation frequency of the compressor according to the change rate interval to which the average change rate belongs comprises the following steps:
acquiring a second multiple corresponding to the change rate interval to which the average change rate belongs based on the corresponding relation between the change rate interval and the second multiple;
and acquiring the target operating frequency of the compressor according to a preset basic frequency, a preset frequency adjusting amplitude and a second multiple corresponding to a change rate interval to which the average change rate belongs.
According to the defrosting control method for the air conditioner provided by the invention, after determining the change rate interval to which the average change rate belongs based on the change rate threshold group, the method further comprises the following steps:
if the change rate interval to which the average change rate belongs is an abnormal interval, determining a preset basic rotating speed as a target rotating speed of the outer fan and/or determining a preset basic frequency as a target operating frequency of the compressor, and acquiring the cumulative number of times that the change rate interval to which the average change rate belongs is the abnormal interval in the historical defrosting process of the previous preset number of times of the current defrosting process;
and if the accumulated times are judged and known to be not less than the preset times threshold, sending out a fault prompt for indicating that the target resistance value is obtained abnormally.
The present invention also provides an air conditioner defrosting control device, comprising:
the acquisition module is used for acquiring the average change rate of a target resistance value during the period that the temperature of the external coil of the air conditioner is reduced from a second temperature threshold value to a first temperature threshold value if the temperature of the external coil is reduced to be not higher than the first temperature threshold value;
the obtaining module is used for obtaining the target rotating speed of the outer fan and/or the target operating frequency of the compressor according to the average change rate of the target resistance value;
the control module is used for controlling the outer fan and the compressor to defrost according to the target rotating speed of the outer fan and/or the target operating frequency of the compressor;
the target resistance value is a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner.
The present invention also provides an air conditioner including: the air conditioner defrosting control device of any one of the above.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the defrosting control method.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the method of modulating defrost control as described in any of the above.
According to the air conditioner defrosting control method, the device and the air conditioner, the average change rate of the resistance value corresponding to the deformation of the air outlet mesh enclosure of the outdoor unit of the air conditioner is controlled according to the average change rate of the resistance value of the deformation of the air outlet mesh enclosure of the outdoor unit of the air conditioner during the period that the temperature of the external coil pipe is reduced from the second temperature threshold to the first temperature threshold, the rotating speed of the external fan and/or the operating frequency of the compressor are controlled to perform defrosting, the rotating speed of the external fan and/or the operating frequency of the compressor during defrosting can be automatically adjusted according to the current frosting thickness of the condenser, defrosting can be performed more quickly, the defrosting period can be shortened, the defrosting requirements of various working conditions can be met, the heating capacity of.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a defrosting control method for an air conditioner provided by the invention;
FIG. 2 is a schematic structural diagram of an air conditioner defrosting control device provided by the invention;
fig. 3 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and not order.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In order to overcome the problems in the prior art, the invention provides an air conditioner defrosting control method, an air conditioner defrosting control device and an air conditioner.
Fig. 1 is a flow chart of an air conditioner defrosting control method provided by the invention. The air conditioner defrosting control method according to an embodiment of the present invention will be described with reference to fig. 1. As shown in fig. 1, the method includes: step 101, if the temperature of the external coil of the air conditioner is reduced to be not higher than a first temperature threshold, acquiring the average change rate of the target resistance value during the period that the temperature of the external coil is reduced from a second temperature threshold to the first temperature threshold.
The target resistance value is a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner.
Specifically, during normal heating operation of the air conditioner, the temperature of the external coil may be monitored.
The temperature of the outer coil can be monitored according to a preset time interval.
When the temperature T of the external coil is monitoredOuter plate≤TThreshold value 2Then, the resistance value corresponding to the deformation of the air outlet mesh enclosure of the outdoor unit of the air conditioner is obtained and used as the target resistance value R0。
When the temperature T of the external coil is monitoredOuter plate≤TThreshold value 1Then, the resistance value corresponding to the deformation of the air outlet mesh enclosure of the outdoor unit of the air conditioner is obtained and used as the target resistance value R1。
TThreshold value 2＝TThreshold value 1+ΔT0
Wherein, Delta T0Is a positive number.
ΔT0The value of the element can be set according to actual conditions, and the embodiment of the invention is not particularly limited. Delta T0May be 3-5 ℃. Preferably, Δ T0＝5℃。
TThreshold value 1Is the judgment threshold condition for the air conditioner to enter the defrosting mode. T isOuter plate≤TThreshold value 1The air conditioner enters a defrost mode.
According to R0And R1Can obtain TOuter plateFrom TThreshold value 2Down to TThreshold value 1During which the average rate of change of the target resistance value.
The first temperature threshold and the second temperature threshold may be set according to actual conditions, and values thereof are not specifically limited in the embodiments of the present invention.
And 102, acquiring a target rotating speed of an external fan of the air conditioner and/or a target operating frequency of a compressor of the air conditioner according to the average change rate of the target resistance value.
Specifically, the defrosting may be achieved by the outer fan and/or the compressor, and thus, the defrosting speed may be adjusted only by controlling the rotation speed of the outer fan of the air conditioner, may also be adjusted only by controlling the operation frequency of the compressor of the air conditioner, and may also be adjusted by controlling the rotation speed of the outer fan of the air conditioner and the operation frequency of the compressor.
If the defrosting speed is adjusted only by controlling the rotating speed of the outer fan of the air conditioner, the rotating speed corresponding to the average change rate of the target resistance value can be obtained and used as the target rotating speed of the outer fan; if the defrosting speed is adjusted only by controlling the operating frequency of the compressor of the air conditioner, the operating frequency corresponding to the average change rate of the target resistance value can be obtained and used as the target operating frequency of the compressor; if the defrosting speed is adjusted by controlling the rotating speed of the outer fan of the air conditioner and the operating frequency of the compressor, the rotating speed corresponding to the average change rate of the target resistance value can be obtained and used as the target rotating speed of the outer fan, and the operating frequency corresponding to the average change rate of the target resistance value can be obtained and used as the target operating frequency of the compressor.
The thicker the frost layer is, the smaller the variation of the deformation of the air outlet mesh enclosure is, the larger the resistance value corresponding to the deformation of the air outlet mesh enclosure is, and the faster the change of the target resistance value is (that is, the larger the average change rate of the target resistance value is); the thinner the frost layer is, the greater the amount of change in deformation of the air outlet mesh enclosure is, the smaller the resistance value corresponding to the deformation of the air outlet mesh enclosure is, and the slower the change in the target resistance value is (that is, the smaller the average change rate of the target resistance value is).
If the rotating speed of the outer fan adopts the discrete values of a plurality of gears, the rotating speed corresponding to a larger average change rate is greater than or equal to the rotating speed corresponding to a smaller average change rate, and the average change rate corresponding to a higher rotating speed is greater than the average change rate corresponding to a lower rotating speed; if the operating frequency of the compressor adopts the discrete values of a plurality of gears, the operating frequency corresponding to the larger average change rate is greater than or equal to the operating frequency corresponding to the smaller average change rate, and the average change rate corresponding to the higher operating frequency is greater than the average change rate corresponding to the lower operating frequency.
If the rotating speed of the outer fan adopts a continuous value, the rotating speed corresponding to a larger average change rate is larger than the rotating speed corresponding to a smaller average change rate; if the operating frequency of the compressor adopts a continuous value, the operating frequency corresponding to the larger average change rate is larger than the operating frequency corresponding to the smaller average change rate.
And 103, controlling the outer fan and the compressor to defrost according to the target rotating speed of the outer fan and/or the target operating frequency of the compressor.
Specifically, after the target rotation speed of the outer fan is obtained, the fan can be controlled to operate at the target rotation speed, and defrosting is performed.
After the target operation frequency of the compressor is obtained, the compressor can be controlled to operate at the target operation frequency, and defrosting is performed.
According to the embodiment of the invention, the rotating speed of the outer fan and/or the operating frequency of the compressor are controlled to execute defrosting according to the average change rate of the resistance value corresponding to the deformation of the air outlet mesh enclosure of the outdoor unit of the air conditioner during the period that the temperature of the outer coil pipe is reduced from the second temperature threshold to the first temperature threshold, so that the rotating speed of the outer fan and/or the operating frequency of the compressor during defrosting can be automatically adjusted according to the current frosting thickness of the condenser, defrosting can be more quickly carried out, the defrosting period can be shortened, the defrosting requirements of various working conditions can be met, the heating capacity of the whole machine operation of the air conditioner can be improved, and the comfort of users in using the air conditioner can.
Based on the content of any of the above embodiments, the specific step of obtaining the average change rate of the target resistance value during the period when the temperature of the external coil decreases from the second temperature threshold to the first temperature threshold includes: respectively obtaining the target resistance value when the temperature of the outer coil pipe is reduced to the second temperature threshold value and the target resistance value when the temperature of the outer coil pipe is continuously reduced to the first temperature threshold value, and obtaining the total operation time of a compressor of the air conditioner during the period that the temperature of the outer coil pipe is reduced to the first temperature threshold value from the second temperature threshold value.
Specifically, the resistance value corresponding to the deformation of the air outlet mesh enclosure of the outdoor unit of the air conditioner may be obtained through the resistance strain gauge installed inside the air outlet mesh enclosure, and the resistance value is used as the target resistance value.
Generally, the central portion of the air outlet cover of the outdoor unit is a circular disc, and preferably, the resistance strain gauge may be installed on a side of the circular disc close to the external fan (i.e., an inner side of the air outlet cover).
The resistance strain gauge is an element for measuring strain. The resistive strain gage is capable of converting a change in strain on the mechanical member into a change in resistance.
The measurement principle of the resistance strain gauge is as follows: the resistance of the wire is related to the length and cross-sectional area of the wire, in addition to the properties of the material. The wire is adhered to the member, and when the member is deformed under a force, the length and the cross-sectional area of the wire are changed along with the member, so that the resistance is changed.
In the embodiment of the present invention, the component is an air outlet mesh enclosure of the outdoor unit, and specifically, the component may be a disk located in a central portion of the air outlet mesh enclosure.
It can be understood that, during the heating process of the air conditioner, the compressor of the air conditioner does not operate uninterruptedly, and the target resistance value is changed when the compressor operates, so T can be obtainedOuter plateFrom TThreshold value 2Down to TThreshold value 1During which the total operating time t of the compressor0。
And acquiring the average change rate of the target resistance value according to the target resistance value when the temperature of the outer coil pipe is reduced to the second temperature threshold value, the target resistance value when the temperature of the outer coil pipe is continuously reduced to the first temperature threshold value and the total running time.
Specifically, the average rate of change Δ R of the target resistance value is calculated by the formula
ΔR＝(R0-R1)/t0
According to the target resistance value when the temperature of the outer coil pipe is reduced to the second temperature threshold value and the target resistance value when the temperature of the outer coil pipe is continuously reduced to the first temperature threshold value, and the total operation time of the compressor of the air conditioner during the period that the temperature of the outer coil pipe is reduced from the second temperature threshold value to the first temperature threshold value, the average change rate of the target resistance value is obtained, the more accurate average change rate of the target resistance value can be obtained, the frosting thickness can be more accurately represented by the average change rate of the target resistance value, the defrosting process can be more accurately controlled, defrosting can be more quickly carried out, the defrosting period can be shortened, the defrosting requirements of various working conditions can be met, the heating capacity of the whole machine operation of the air conditioner can be improved, and the comfort of a user in using the air conditioner.
Based on the content of any of the above embodiments, the specific step of obtaining the target rotation speed of the external fan of the air conditioner and/or the target operating frequency of the compressor of the air conditioner according to the average change rate of the target resistance value includes: and determining a change rate interval to which the average change rate belongs based on the change rate threshold group.
In particular, the set of rate of change thresholds may include one rate of change threshold or a plurality of rate of change thresholds of different values.
The rate of change interval to which the average rate of change belongs can be determined by comparing the average rate of change to the magnitudes of the rate of change thresholds comprised in the set of rate of change thresholds.
For example: the change rate threshold set is composed of a change rate threshold 0, Δ R1、ΔR2Composition, 0 < DeltaR1＜ΔR24 change rate intervals (-infinity, 0), [0,. DELTA.R ] are formed1)，[ΔR1,ΔR2)，[ΔR2And + ∞) in sequence into a first interval, a second interval, a third interval and a fourth interval; if Δ R is greater than or equal to 0 and less than Δ R1Then the average rate of change Δ R rate of change interval is the second interval.
And acquiring the target rotating speed of the outer fan and/or the target operating frequency of the compressor according to the change rate interval to which the average change rate belongs.
Specifically, for convenience of control, the rotation speed of the outer fan may adopt discrete values of a plurality of gears, and the change rate intervals may correspond to the gears of the rotation speed one by one, and thus each change rate interval corresponds to one rotation speed. After the change rate section to which the average change rate belongs is obtained, the rotating speed corresponding to the change rate section to which the average change rate belongs can be determined as the rotating speed corresponding to the average change rate of the target resistance value, and the rotating speed is used as the target rotating speed of the outer fan.
For convenience of control, the operating frequency of the compressor may adopt discrete values of a plurality of gears, and the variation rate intervals may correspond to the gears of the operating frequency one by one, so that each variation rate interval corresponds to one operating frequency. After the variation rate section to which the average variation rate belongs is obtained, the operating frequency corresponding to the variation rate section to which the average variation rate belongs may be determined as the operating frequency corresponding to the average variation rate of the target resistance value, and is used as the target operating frequency of the compressor.
According to the embodiment of the invention, based on the change rate interval divided by the change rate threshold group, the rotating speed corresponding to the change rate interval to which the average change rate of the target resistance value belongs is determined as the target rotating speed of the outer fan, and the operating frequency corresponding to the change rate interval to which the average change rate of the target resistance value belongs is determined as the target operating frequency of the compressor, so that the rotating speed of the outer fan and/or the operating frequency of the compressor are controlled to defrost, the rotating speed of the outer fan and/or the operating frequency of the compressor during defrosting can be automatically adjusted according to the current frosting thickness of the condenser, defrosting can be more quickly carried out, the defrosting period can be shortened, the defrosting requirements of various working conditions can be met, the heating capacity of the whole machine operation of the air conditioner can be improved, and the comfort of users in using the air conditioner can.
Based on the content of any of the above embodiments, the specific step of obtaining the target operating frequency of the compressor according to the variation rate section to which the average variation rate belongs includes: and acquiring a first multiple corresponding to the change rate interval to which the average change rate belongs based on the corresponding relation between the change rate interval and the first multiple.
Specifically, the target rotation speed of the outer fan may be determined based on the basic rotation speed, and the target rotation speed is kept unchanged or increased or decreased according to a change rate interval to which the average change rate belongs.
The change rate intervals may correspond to the first multiples one by one, and the first multiples corresponding to the change rate areas to which the average change rates belong may be obtained according to the correspondence between the change rate intervals and the first multiples.
It can be understood that the larger the change rate interval corresponding to the change rate interval is, the larger the first multiple is; the smaller the change rate interval corresponding to the change rate interval is, the smaller the first multiple is.
The specific value of each first multiple can be set according to practical conditions such as air conditioner configuration and the like. The embodiment of the present invention is not particularly limited with respect to the specific value of the first multiple.
For example, the set of rate of change thresholds consists of a rate of change threshold of 0, Δ R1、ΔR2Composition, 0 < DeltaR1＜ΔR24 change rate intervals (-infinity, 0), [0,. DELTA.R ] are formed1)，[ΔR1,ΔR2)，[ΔR2And + ∞) in sequence into a first interval, a second interval, a third interval and a fourth interval; if Δ R is greater than or equal to 0 and less than Δ R1The first multiple may be equal to 0; if Δ R1≤ΔR＜ΔR2The first multiple may range from 2 to 4; if Δ R>ΔR2The first multiple may range from 5 to 8.
And acquiring the target rotating speed of the outer fan according to the preset basic rotating speed, the rotating speed adjusting amplitude and the first multiple corresponding to the change rate interval to which the average change rate belongs.
Specifically, at a base rotation speed NIs provided withOn the basis, the target rotating speed N of the outer fan can be obtained by adding the product of the rotating speed adjusting amplitude delta N and the first multiple corresponding to the change rate interval to which the average change rate belongs.
N＝NIs provided with+aΔN
Wherein a represents a first multiple corresponding to the change rate interval to which the average change rate belongs.
NIs provided withA base speed value set for the control logic.
Basic speed NIs provided withThe value of (b) can be 800-. Preferably, the base speed NIs provided withIs 1000 r/min.
Wherein, Δ N is a rotation speed adjustment amplitude value set by the control logic.
The rotating speed adjusting amplitude delta N can be 10-100 r/min. Preferably, the value of the rotating speed adjusting amplitude delta N is 50 r/min.
According to the embodiment of the invention, the target rotating speed of the outer fan is obtained according to the preset basic rotating speed, the rotating speed adjusting amplitude and the first multiple corresponding to the change rate interval to which the average change rate belongs, the outer fan can be controlled to execute defrosting at a more proper rotating speed, the rotating speed of the outer fan during defrosting can be automatically adjusted according to the current frosting thickness of the condenser, defrosting can be carried out more quickly, the defrosting period can be shortened, the defrosting requirements of various working conditions can be met, the heating capacity of the whole machine operation of the air conditioner can be improved, and the comfort of a user in using the air conditioner can be improved.
Based on the content of any of the above embodiments, the specific step of obtaining the target operating frequency of the compressor according to the variation rate section to which the average variation rate belongs includes: and acquiring a second multiple corresponding to the change rate interval to which the average change rate belongs based on the corresponding relation between the change rate interval and the second multiple.
Specifically, the target operating frequency of the compressor may be determined based on the fundamental frequency, and may be maintained or added or subtracted according to a variation rate interval to which the average variation rate belongs.
The change rate interval may correspond to the second multiple one by one, and the second multiple corresponding to the change rate region to which the average change rate belongs may be obtained according to the corresponding relationship between the change rate interval and the second multiple.
It is understood that the larger the change rate interval corresponding to the change rate interval, the larger the second multiple; the smaller the change rate interval corresponding to the change rate interval, the smaller the second multiple.
The specific value of each second multiple can be set according to the actual conditions such as air conditioning configuration. The embodiment of the present invention is not particularly limited to the specific value of the second multiple.
For example, the set of rate of change thresholds consists of a rate of change threshold of 0, Δ R1、ΔR2Composition, 0 < DeltaR1＜ΔR24 change rate intervals (-infinity, 0), [0,. DELTA.R ] are formed1)，[ΔR1,ΔR2)，[ΔR2And + ∞) in sequence into a first interval, a second interval, a third interval and a fourth interval; if Δ R is greater than or equal to 0 and less than Δ R1The second multiple may be 0; if Δ R1≤ΔR＜ΔR2The second multiple may range from 2 to 5; if Δ R>ΔR2The second multiple may range from 6 to 10.
And acquiring the target operating frequency of the compressor according to the preset basic frequency, the frequency adjusting amplitude and the second multiple corresponding to the change rate interval to which the average change rate belongs.
In particular at the fundamental frequency fIs provided withOn the basis, the target operating frequency f of the compressor can be obtained by adding the product of the frequency adjustment amplitude Δ f and a second multiple corresponding to the change rate interval to which the average change rate belongs.
f＝fIs provided with+bΔf
Wherein b represents a second multiple corresponding to the change rate interval to which the average change rate belongs.
Wherein f isIs provided withIs the base frequency value set for the control logic.
Fundamental frequency fIs provided withThe value of (A) can be 50-120 Hz. Preferably, the base speed NIs provided withIs 80 Hz.
Δ f is the frequency adjustment amplitude value set by the control logic.
The frequency adjustment amplitude deltaf can take the value of 1-5 Hz. Preferably, the frequency adjustment amplitude Δ f takes the value of 3 Hz.
According to the embodiment of the invention, the target operation frequency of the compressor is obtained according to the preset basic frequency, the frequency adjustment amplitude and the second multiple corresponding to the change rate interval to which the average change rate belongs, the compressor can be controlled to execute defrosting at a more proper operation frequency, the operation frequency of the compressor during defrosting can be automatically adjusted according to the current frosting thickness of the condenser, defrosting can be carried out more quickly, the defrosting period can be shortened, the defrosting requirements of various working conditions can be met, the heating capacity of the whole machine operation of the air conditioner can be improved, and the comfort of a user in using the air conditioner can be improved.
Based on the content of any of the above embodiments, after determining the change rate interval to which the average change rate belongs based on the change rate threshold set, the method further includes: and if the change rate interval to which the average change rate belongs is an abnormal interval, determining a preset basic rotating speed as a target rotating speed of the outer fan and/or determining a preset basic frequency as a target operating frequency of the compressor, and acquiring the cumulative frequency of the change rate interval to which the average change rate belongs in the historical defrosting process of the previous preset frequency of the current defrosting process as the abnormal interval.
Specifically, in general, the target resistance value at the time when the temperature of the outer coil is the second temperature threshold is greater than or equal to the target resistance value at the time when the temperature of the outer coil is the first temperature threshold, and therefore, the variation rate zone (— infinity, 0) may be referred to as an abnormal zone.
The temperature of the outer coil pipe is reduced to be not higher than the first temperature threshold value, defrosting is needed, although the average change rate delta R belongs to the abnormal interval, the air conditioner still enters a defrosting mode, according to different defrosting speed adjusting modes, only the target rotating speed of the outer fan can be determined, only the target operating frequency of the compressor can be determined, and also the target rotating speed of the outer fan and the target operating frequency of the compressor can be determined.
The method for determining the target rotating speed of the outer fan can comprise the following steps: and determining the preset basic rotating speed as the target rotating speed of the outer fan, namely, the first multiple corresponding to the abnormal interval is 0.
The method of determining the target operating frequency of the compressor may include: the preset basic frequency is determined as the target operation frequency of the compressor, i.e. the second multiple corresponding to the abnormal interval is 0.
It should be noted that, each time the temperature of the external coil pipe is reduced to be not higher than the first temperature threshold value, the air conditioner enters the defrosting mode, and each time the external coil pipe is externally cooledThe temperature of the coil is raised to not lower than a preset third temperature threshold (T)Outer plate>TThreshold value 3And TThreshold value 3>TThreshold value 1) And the air conditioner enters a defrosting mode and exits the defrosting mode.
Third temperature threshold TThreshold value 3The value of the element can be set according to actual conditions, and the embodiment of the invention is not particularly limited.
The air conditioner exits the defrosting mode for the first time after entering the defrosting mode every time, and a defrosting process is formed.
And if the delta R in the defrosting process is less than 0, counting the times of the delta R in the previous n historical defrosting processes of the defrosting process, wherein the times of the delta R in the previous n historical defrosting processes are less than 0.
Wherein n is a preset number of times. The preset number n may be set according to an actual situation, and a value thereof is not specifically limited in the embodiment of the present invention.
For example, n is 9 or 10.
And if the obtained accumulated times is judged to be not less than the preset time threshold, sending out a fault prompt for indicating that the target resistance value is obtained abnormally.
Specifically, the number of times that Δ R is less than 0 in the previous n historical defrosting processes of the current defrosting process is compared with the preset number threshold m.
If the times that the delta R is less than 0 in the previous n times of historical defrosting processes in the current defrosting process are larger than or equal to the preset time threshold m, the fact that the target resistance value is possibly acquired is shown, and a fault prompt is sent. The failure indication indicates that there is an abnormality in the acquisition of the target resistance value.
If the times that the delta R is less than 0 in the previous n times of historical defrosting processes in the current defrosting process are less than the preset time threshold m, it is indicated that whether the acquisition of the target resistance value is problematic or not can not be determined temporarily, and the delta R acquired in each defrosting process after the current defrosting process can be waited for further determination.
Wherein m is a preset number. The preset number threshold m may be set according to an actual situation, and its value is not specifically limited in the embodiments of the present invention.
For example, m is 2 or 3.
According to the embodiment of the invention, when the change rate interval to which the average change rate belongs is an abnormal interval, the outer fan is controlled to defrost at the preset basic rotating speed and/or the compressor at the preset basic frequency, so that the defrosting can be ensured. And when the statistical frequency of the abnormal interval of the change rate interval to which the average change rate belongs meets the preset condition, sending a fault prompt for indicating that the target resistance value is obtained abnormally, so that a user can timely eliminate the fault of the target resistance value by adopting modes of replacing a resistance strain gauge and the like, the automatic regulation of the rotating speed of an outer fan and/or the running frequency of a compressor during defrosting according to the current frosting thickness of the condenser can be ensured in the subsequent defrosting process, defrosting can be carried out more quickly, the defrosting period can be shortened, the defrosting requirements of various working conditions can be met, the heating capacity of the whole machine running of the air conditioner can be improved, and the comfort of the user in using the air conditioner can be improved.
The following describes the air conditioner defrosting control device provided by the present invention, and the air conditioner defrosting control device described below and the air conditioner defrosting control method described above can be referred to correspondingly.
Fig. 2 is a schematic structural diagram of an air conditioner defrosting control device according to an embodiment of the invention. Based on the content of any of the above embodiments, as shown in fig. 2, the apparatus includes an acquisition module 201, an acquisition module 202, and a control module 203, where:
the acquisition module 201 is configured to acquire an average change rate of a target resistance value when the temperature of the external coil of the air conditioner is reduced from the second temperature threshold to the first temperature threshold if the temperature of the external coil is reduced to be not higher than the first temperature threshold;
the obtaining module 202 is configured to obtain a target rotation speed of the outer fan and/or a target operating frequency of the compressor according to the average change rate of the target resistance;
the control module 203 is used for controlling the outer fan and the compressor to defrost according to the target rotating speed of the outer fan and/or the target operating frequency of the compressor;
the target resistance value is a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner.
Specifically, the acquisition module 201, the acquisition module 202 and the control module 203 are electrically connected in sequence.
The acquisition module 201 may monitor the temperature of the external coil.
When the temperature T of the external coil is monitoredOuter plate≤TThreshold value 2In this case, the collecting module 201 may obtain a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner at this time, and the resistance value is used as the target resistance value R at this time0(ii) a When the temperature T of the external coil is monitoredOuter plate≤TThreshold value 1In this case, the collecting module 201 may obtain a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner at this time, and the resistance value is used as the target resistance value R at this time1。
The acquisition module 201 is according to R0And R1Can obtain TOuter plateFrom TThreshold value 2Down to TThreshold value 1During which the average rate of change of the target resistance value.
The collecting module 201 may include a resistance strain gauge installed inside the air outlet mesh enclosure to obtain a target resistance value.
The acquisition module 201 may comprise a temperature monitoring unit for acquiring the temperature of the external coil.
The acquisition module 201 may include a duration acquisition unit for acquiring a total operation duration of a compressor of the air conditioner during a period in which the temperature of the external coil is decreased from the second temperature threshold to the first temperature threshold.
The acquisition module 201 may include a time-varying rate acquisition unit, configured to acquire an average rate of change of the target resistance value according to the target resistance value when the temperature of the external coil pipe is decreased to the second temperature threshold value, the target resistance value when the temperature of the external coil pipe is continuously decreased to the first temperature threshold value, and the total operation duration.
If the defrosting speed is adjusted only by controlling the rotating speed of the outer fan of the air conditioner, the obtaining module 202 may obtain the rotating speed corresponding to the average change rate of the target resistance value as the target rotating speed of the outer fan; if the defrosting speed is adjusted only by controlling the operating frequency of the compressor of the air conditioner, the obtaining module 202 may obtain the operating frequency corresponding to the average change rate of the target resistance value as the target operating frequency of the compressor; if the defrosting speed is adjusted by controlling the rotating speed of the outer fan of the air conditioner and the operating frequency of the compressor, the obtaining module 202 may obtain the rotating speed corresponding to the average change rate of the target resistance value as the target rotating speed of the outer fan, and may obtain the operating frequency corresponding to the average change rate of the target resistance value as the target operating frequency of the compressor.
The obtaining module 202 may comprise an interval determining unit for determining a change rate interval to which the average change rate belongs based on the change rate threshold set.
The obtaining module 202 may include a target value obtaining unit, configured to obtain a target rotation speed of the outer fan and/or a target operating frequency of the compressor according to a variation rate section to which the average variation rate belongs.
The target value obtaining unit may include a first multiple obtaining subunit configured to obtain, based on a correspondence between the change rate interval and the first multiple, a first multiple corresponding to the change rate interval to which the average change rate belongs.
The target value obtaining unit may include a rotation speed obtaining subunit, configured to obtain a target rotation speed of the outer fan according to a preset basic rotation speed, a rotation speed adjustment amplitude, and a first multiple corresponding to a change rate interval to which the average change rate belongs.
The target value acquisition unit may include a second number acquisition subunit configured to acquire, based on a correspondence relationship between the change rate section and the second multiplier, the second multiplier corresponding to the change rate section to which the average change rate belongs.
The target value obtaining unit may include a frequency obtaining subunit, configured to obtain the target operating frequency of the compressor according to a preset second multiple corresponding to a variation rate interval to which the basic frequency, the frequency adjustment amplitude, and the average variation rate belong.
The target value obtaining unit may be further configured to determine a preset basic rotation speed as a target rotation speed of the outer fan and/or determine a preset basic frequency as a target operation frequency of the compressor if a variation rate section to which the average variation rate belongs is an abnormal section.
The obtaining module 202 may further include an early warning unit, configured to obtain the cumulative number of times that a change rate interval to which the average change rate belongs in the past preset number of times of the current defrosting process in the historical defrosting process is an abnormal interval; and if the obtained accumulated times is judged to be not less than the preset time threshold, sending out a fault prompt for indicating that the target resistance value is obtained abnormally.
After acquiring the target rotation speed of the external fan, the control module 203 may control the fan to operate at the target rotation speed, and perform defrosting.
After acquiring the target operating frequency of the compressor, the control module 203 may control the compressor to operate at the target operating frequency to perform defrosting.
The air conditioner defrosting control device provided by the embodiment of the invention is used for executing the air conditioner defrosting control method provided by the invention, the implementation mode of the air conditioner defrosting control device is consistent with that of the air conditioner defrosting control method provided by the invention, and the same beneficial effects can be achieved, and the details are not repeated herein.
The air conditioner defrosting control device is used for the air conditioner defrosting control method of each embodiment. Therefore, the description and definition in the air conditioner defrosting control method in the foregoing embodiments can be used for understanding the execution modules in the embodiments of the present invention.
According to the embodiment of the invention, the rotating speed of the outer fan and/or the operating frequency of the compressor are controlled to execute defrosting according to the average change rate of the resistance value corresponding to the deformation of the air outlet mesh enclosure of the outdoor unit of the air conditioner during the period that the temperature of the outer coil pipe is reduced from the second temperature threshold to the first temperature threshold, so that the rotating speed of the outer fan and/or the operating frequency of the compressor during defrosting can be automatically adjusted according to the current frosting thickness of the condenser, defrosting can be more quickly carried out, the defrosting period can be shortened, the defrosting requirements of various working conditions can be met, the heating capacity of the whole machine operation of the air conditioner can be improved, and the comfort of users in using the air conditioner can.
Based on the content of any embodiment, an embodiment of the present invention provides an air conditioner, including: air conditioner defrosting control device.
Specifically, the air conditioner defrosting control device can be electrically connected with an external fan and/or a condenser of the air conditioner and used for controlling the external fan and the compressor to defrost.
The air conditioner defrosting control device may be the air conditioner defrosting control device provided in any of the above embodiments.
According to the embodiment of the invention, the rotating speed of the outer fan and/or the operating frequency of the compressor are controlled to execute defrosting according to the average change rate of the resistance value corresponding to the deformation of the air outlet mesh enclosure of the outdoor unit of the air conditioner during the period that the temperature of the outer coil pipe is reduced from the second temperature threshold to the first temperature threshold, so that the rotating speed of the outer fan and/or the operating frequency of the compressor during defrosting can be automatically adjusted according to the current frosting thickness of the condenser, defrosting can be more quickly carried out, the defrosting period can be shortened, the defrosting requirements of various working conditions can be met, the heating capacity of the whole machine operation of the air conditioner can be improved, and the comfort of users in using the air conditioner can.
Fig. 3 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 3: a processor (processor)310, a communication Interface (communication Interface)320, a memory (memory)330 and a communication bus 340, wherein the processor 310, the communication Interface 320 and the memory 330 communicate with each other via the communication bus 340. The processor 310 may call logic instructions stored in the memory 330 and executable on the processor 310 to perform the air conditioner defrosting control method provided by the above-mentioned method embodiments, the method includes: if the temperature of the external coil of the air conditioner is judged and known to be not higher than the first temperature threshold, the average change rate of the target resistance value is obtained when the temperature of the external coil is reduced from the second temperature threshold to the first temperature threshold; acquiring a target rotating speed of an outer fan of the air conditioner and/or a target operating frequency of a compressor of the air conditioner according to the average change rate of the target resistance value; controlling the outer fan and the compressor to defrost according to the target rotating speed of the outer fan and/or the target operating frequency of the compressor; the target resistance value is a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner.
In addition, the logic instructions in the memory 330 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The processor 310 in the electronic device according to the embodiment of the present invention may call the logic instruction in the memory 330, and the implementation manner of the processor is consistent with the implementation manner of the air conditioner defrosting control method according to the embodiment of the present invention, and the same beneficial effects may be achieved, and details are not described here.
In another aspect, an embodiment of the present invention further provides a computer program product, where the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, where the computer program includes program instructions, and when the program instructions are executed by a computer, the computer is capable of executing the air conditioner defrosting control method provided by the above-mentioned method embodiments, where the method includes: if the temperature of the external coil of the air conditioner is judged and known to be not higher than the first temperature threshold, the average change rate of the target resistance value is obtained when the temperature of the external coil is reduced from the second temperature threshold to the first temperature threshold; acquiring a target rotating speed of an outer fan of the air conditioner and/or a target operating frequency of a compressor of the air conditioner according to the average change rate of the target resistance value; controlling the outer fan and the compressor to defrost according to the target rotating speed of the outer fan and/or the target operating frequency of the compressor; the target resistance value is a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner.
When the computer program product provided by the embodiment of the present invention is executed, the method for controlling defrosting of an air conditioner is implemented, and the specific implementation manner of the method is consistent with the implementation manner described in the embodiment of the foregoing method, and the same beneficial effects can be achieved, and details are not repeated herein.
In still another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented by a processor to execute the air conditioner defrosting control method provided in the foregoing embodiments, and the method includes: if the temperature of the external coil of the air conditioner is judged and known to be not higher than the first temperature threshold, the average change rate of the target resistance value is obtained when the temperature of the external coil is reduced from the second temperature threshold to the first temperature threshold; acquiring a target rotating speed of an outer fan of the air conditioner and/or a target operating frequency of a compressor of the air conditioner according to the average change rate of the target resistance value; controlling the outer fan and the compressor to defrost according to the target rotating speed of the outer fan and/or the target operating frequency of the compressor; the target resistance value is a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner.
When the computer program stored on the non-transitory computer readable storage medium provided in the embodiments of the present invention is executed, the method for controlling defrosting of an air conditioner is implemented, and the specific implementation manner of the method is consistent with the implementation manner described in the embodiments of the method, and the same beneficial effects can be achieved, which is not described herein again.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An air conditioner defrosting control method is characterized by comprising the following steps:
if the temperature of an external coil of the air conditioner is reduced to be not higher than a first temperature threshold value, acquiring the average change rate of a target resistance value during the period that the temperature of the external coil is reduced from a second temperature threshold value to the first temperature threshold value;
acquiring a target rotating speed of an outer fan of the air conditioner and/or a target operating frequency of a compressor of the air conditioner according to the average change rate of the target resistance value;
controlling the outer fan and the compressor to defrost according to the target rotating speed of the outer fan and/or the target operating frequency of the compressor;
the target resistance value is a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner.
2. The air conditioner defrosting control method according to claim 1, wherein the step of obtaining an average rate of change of the target resistance value during the period when the temperature of the external coil decreases from the second temperature threshold to the first temperature threshold comprises:
respectively obtaining a target resistance value when the temperature of the external coil pipe is reduced to the second temperature threshold value and a target resistance value when the temperature of the external coil pipe is continuously reduced to the first temperature threshold value, and obtaining the total operation time of a compressor of the air conditioner during the period that the temperature of the external coil pipe is reduced from the second temperature threshold value to the first temperature threshold value;
and acquiring the average change rate of the target resistance value according to the target resistance value when the temperature of the outer coil pipe is reduced to the second temperature threshold value, the target resistance value when the temperature of the outer coil pipe is continuously reduced to the first temperature threshold value and the total running time.
3. The air conditioner defrosting control method according to claim 1 or 2, wherein the specific step of obtaining the target rotation speed of the external fan of the air conditioner and/or the target operating frequency of the compressor of the air conditioner according to the average change rate of the target resistance value includes:
determining a change rate interval to which the average change rate belongs based on a change rate threshold set;
and acquiring the target rotating speed of the outer fan and/or the target operating frequency of the compressor according to the change rate interval to which the average change rate belongs.
4. The air conditioner defrosting control method according to claim 3, wherein the specific step of obtaining the target operating frequency of the compressor according to the variation rate section to which the average variation rate belongs includes:
acquiring a first multiple corresponding to the change rate interval to which the average change rate belongs based on the corresponding relation between the change rate interval and the first multiple;
and acquiring the target rotating speed of the outer fan according to a preset basic rotating speed, a preset rotating speed adjusting amplitude and a first multiple corresponding to a changing rate interval to which the average changing rate belongs.
5. The air conditioner defrosting control method according to claim 3, wherein the specific step of obtaining the target operating frequency of the compressor according to the variation rate section to which the average variation rate belongs includes:
acquiring a second multiple corresponding to the change rate interval to which the average change rate belongs based on the corresponding relation between the change rate interval and the second multiple;
and acquiring the target operating frequency of the compressor according to a preset basic frequency, a preset frequency adjusting amplitude and a second multiple corresponding to a change rate interval to which the average change rate belongs.
6. The air conditioner defrost control method of claim 3, wherein after determining a change rate interval to which the average change rate belongs based on the change rate threshold set, further comprising:
if the change rate interval to which the average change rate belongs is an abnormal interval, determining a preset basic rotating speed as a target rotating speed of the outer fan and/or determining a preset basic frequency as a target operating frequency of the compressor, and acquiring the cumulative number of times that the change rate interval to which the average change rate belongs is the abnormal interval in the historical defrosting process of the previous preset number of times of the current defrosting process;
and if the accumulated times are judged and known to be not less than the preset times threshold, sending out a fault prompt for indicating that the target resistance value is obtained abnormally.
7. An air conditioner defrosting control device, comprising:
the acquisition module is used for acquiring the average change rate of a target resistance value during the period that the temperature of the external coil of the air conditioner is reduced from a second temperature threshold value to a first temperature threshold value if the temperature of the external coil is reduced to be not higher than the first temperature threshold value;
the obtaining module is used for obtaining the target rotating speed of the outer fan and/or the target operating frequency of the compressor according to the average change rate of the target resistance value;
the control module is used for controlling the outer fan and the compressor to defrost according to the target rotating speed of the outer fan and/or the target operating frequency of the compressor;
the target resistance value is a resistance value corresponding to deformation of an air outlet mesh enclosure of an outdoor unit of the air conditioner.
8. An air conditioner, comprising: the air conditioner defrost control apparatus of claim 7.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps of the air conditioner defrost control method according to any of claims 1-6.
10. A non-transitory computer readable storage medium having a computer program stored thereon, wherein the computer program when executed by a processor implements the steps of the air conditioner defrost control method according to any one of claims 1-6.
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| CN114061033A (en) * | 2021-11-03 | 2022-02-18 | 青岛海尔空调器有限总公司 | Method and device for defrosting air conditioner, air conditioner and storage medium |
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