CN113339940A - Air conditioner defrosting control method and device, storage medium and air conditioner - Google Patents

Air conditioner defrosting control method and device, storage medium and air conditioner Download PDF

Info

Publication number
CN113339940A
CN113339940A CN202110618216.4A CN202110618216A CN113339940A CN 113339940 A CN113339940 A CN 113339940A CN 202110618216 A CN202110618216 A CN 202110618216A CN 113339940 A CN113339940 A CN 113339940A
Authority
CN
China
Prior art keywords
defrosting
temperature
air conditioner
preset
condition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202110618216.4A
Other languages
Chinese (zh)
Inventor
高建栋
黄允棋
于桥林
叶晋生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202110618216.4A priority Critical patent/CN113339940A/en
Publication of CN113339940A publication Critical patent/CN113339940A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • 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
    • F24F2110/10—Temperature
    • 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
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides an air conditioner defrosting control method, an air conditioner defrosting control device, a storage medium and an air conditioner, wherein the method comprises the following steps: when the air conditioner meets the condition of entering defrosting and enters defrosting, detecting whether the reduction value of the indoor environment temperature during defrosting reaches the preset maximum allowable temperature reduction value during defrosting; when the reduction value of the indoor environment temperature is detected to reach the maximum allowable temperature reduction value during defrosting, judging whether the air conditioner meets the condition of quitting defrosting during the defrosting; and if the condition that the air conditioner meets the defrosting quit condition of the current defrosting is judged, controlling the air conditioner to quit defrosting. The scheme provided by the invention can accurately control the descending amplitude of the room temperature drop during defrosting and improve the heating comfort.

Description

Air conditioner defrosting control method and device, storage medium and air conditioner
Technical Field
The invention relates to the field of control, in particular to an air conditioner defrosting control method and device, a storage medium and an air conditioner.
Background
When a heat pump air conditioner is in heating operation, the outer unit condenser is easy to frost when the outer ring humidity is high and the temperature is low, and the traditional air conditioner defrosting logic mainly controls the defrosting period and the defrosting time according to the temperature difference between the pipe temperature and the ring temperature. In the case of a large load of a room, the conventional defrosting logic causes a large reduction in the room temperature.
Disclosure of Invention
The main purpose of the present invention is to overcome the above-mentioned drawbacks of the related art, and provide an air conditioner defrosting control method, device, storage medium and air conditioner, so as to solve the problem in the related art that the traditional defrosting logic would cause a large room temperature drop under the condition of a large room load.
The invention provides an air conditioner defrosting control method on one hand, which comprises the following steps: when the air conditioner meets the condition of entering defrosting and enters defrosting, detecting whether the reduction value of the indoor environment temperature during defrosting is greater than or equal to the preset maximum allowable temperature reduction value during defrosting; when the fact that the reduction value of the indoor environment temperature is larger than or equal to the maximum allowable temperature reduction value during defrosting is detected, whether the air conditioner meets the condition that the defrosting exits in the current defrosting is judged; and if the condition that the air conditioner meets the defrosting quit condition of the current defrosting is judged, controlling the air conditioner to quit defrosting.
Optionally, the conditions for entering defrosting comprise: the tube temperature of the outdoor heat exchanger is less than a first preset tube temperature threshold value; and when defrosting is not performed after the air conditioner is started, determining the first preset pipe temperature threshold value according to the outdoor environment temperature.
Optionally, the method further comprises: determining the next defrosting entry condition of the air conditioner according to the tube temperature difference value between the tube temperature of the outdoor heat exchanger when the air conditioner exits defrosting and the tube temperature of the outdoor heat exchanger when the air conditioner enters defrosting, wherein the defrosting entry condition comprises the following steps: determining a temperature correction value for correcting the defrosting condition according to the pipe temperature difference value; correcting the defrosting condition according to the temperature correction value to determine the next defrosting condition of the air conditioner; wherein the next defrosting entering condition comprises the following steps: the tube temperature of the outdoor heat exchanger is less than a second preset tube temperature threshold value; the second preset tube temperature threshold value is equal to the sum of the first preset tube temperature threshold value and the temperature correction value.
Optionally, determining a temperature correction value for correcting the defrosting condition according to the pipe temperature difference value, where the temperature correction value includes: acquiring the corresponding relation between more than two preset temperature difference value intervals and the temperature correction value; and acquiring a corresponding temperature correction value according to the interval of the tube temperature difference value in the more than two temperature difference value intervals, and determining the temperature correction value as the temperature correction value for correcting the condition of entering defrosting at this time.
Optionally, determining the first preset tube temperature threshold according to the outdoor environment temperature includes: acquiring corresponding relations between more than two preset outdoor environment temperature intervals and a pipe temperature threshold; and acquiring a corresponding first preset pipe temperature threshold value according to the temperature interval of the current outdoor environment temperature in the more than two outdoor environment temperature intervals.
Optionally, the condition for exiting defrosting comprises: the temperature difference value between the current outdoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature when defrosting enters is larger than the sum of the preset temperature difference correction value and the preset temperature difference correction constant.
Optionally, the determining the maximum allowable temperature reduction value during defrosting according to the indoor ambient temperature during defrosting includes: acquiring corresponding relations between more than two preset indoor environment temperature intervals and a defrosting maximum allowable temperature reduction value; and acquiring a corresponding maximum allowable defrosting temperature reduction value according to the temperature interval of the indoor environment temperature when the defrosting is carried out.
In another aspect, the present invention provides an air conditioner defrosting control apparatus, including: the detection unit is used for detecting whether the reduction value of the indoor environment temperature during defrosting is greater than or equal to the preset maximum allowable temperature reduction value during defrosting after the air conditioner enters the defrosting mode when meeting the defrosting condition; the judging unit is used for judging whether the air conditioner meets the condition of quitting defrosting of the current defrosting after the detecting unit detects that the reduction value of the indoor environment temperature is greater than or equal to the maximum allowable temperature reduction value during defrosting; and the control unit is used for controlling the air conditioner to quit defrosting if the judgment unit judges that the air conditioner meets the defrosting quitting condition of the current defrosting.
Optionally, the conditions for entering defrosting comprise: the tube temperature of the outdoor heat exchanger is less than a first preset tube temperature threshold value; and when defrosting is not performed after the air conditioner is started, determining the first preset pipe temperature threshold value according to the outdoor environment temperature.
Optionally, the method further comprises: the determining unit is used for determining the next defrosting entry condition of the air conditioner according to the pipe temperature difference value between the pipe temperature of the outdoor heat exchanger when the air conditioner exits defrosting and the pipe temperature of the outdoor heat exchanger when the air conditioner enters defrosting, and comprises the following steps: determining a temperature correction value for correcting the defrosting condition according to the pipe temperature difference value; correcting the defrosting condition according to the temperature correction value to determine the next defrosting condition of the air conditioner; wherein the next defrosting entering condition comprises the following steps: the tube temperature of the outdoor heat exchanger is less than a second preset tube temperature threshold value; the second preset tube temperature threshold value is equal to the sum of the first preset tube temperature threshold value and the temperature correction value.
Optionally, the determining unit determines, according to the pipe temperature difference value, a temperature correction value for correcting a condition of entering defrosting at this time, and includes: acquiring the corresponding relation between more than two preset temperature difference value intervals and the temperature correction value; and acquiring a corresponding temperature correction value according to the interval of the tube temperature difference value in the more than two temperature difference value intervals, and determining the temperature correction value as the temperature correction value for correcting the condition of entering defrosting at this time.
Optionally, determining the first preset tube temperature threshold according to the outdoor environment temperature includes: acquiring corresponding relations between more than two preset outdoor environment temperature intervals and a pipe temperature threshold; and acquiring a corresponding first preset pipe temperature threshold value according to the temperature interval of the current outdoor environment temperature in the more than two outdoor environment temperature intervals.
Optionally, the condition for exiting defrosting comprises: the temperature difference value between the current outdoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature when defrosting enters is larger than the sum of the preset temperature difference correction value and the preset temperature difference correction constant.
Optionally, the determining the maximum allowable temperature reduction value during defrosting according to the indoor ambient temperature during defrosting includes: acquiring corresponding relations between more than two preset indoor environment temperature intervals and a defrosting maximum allowable temperature reduction value; and acquiring a corresponding maximum allowable defrosting temperature reduction value according to the temperature interval of the indoor environment temperature when the defrosting is carried out.
A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.
Yet another aspect of the present invention provides an air conditioner comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, wherein the processor implements the steps of any of the methods described above when executing the program.
The invention further provides an air conditioner which comprises the defrosting control device of the air conditioner.
According to the technical scheme of the invention, the defrosting exit time is controlled according to the maximum allowable temperature drop amount during defrosting corresponding to the indoor environment temperature during defrosting, so that the reduction range of the room temperature drop during defrosting can be accurately controlled, and the heating comfort is improved. According to the technical scheme of the invention, the time for entering the defrosting next time is controlled according to the temperature difference between the pipe temperature of the outdoor heat exchanger when the defrosting is exited and the pipe temperature of the outdoor heat exchanger when the defrosting is entered, so that the accumulation of frost layers caused by incomplete defrosting is avoided, and the running reliability of the air conditioner is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a defrosting control method for an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a defrosting control method for an air conditioner according to another embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a defrosting control method for an air conditioner according to an embodiment of the present invention;
FIG. 4 is a block diagram of an embodiment of an air conditioner defrosting control device provided by the present invention;
fig. 5 is a block diagram of another embodiment of an air conditioner defrosting control device provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the 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.
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.
Fig. 1 is a schematic method diagram of an embodiment of an air conditioner defrosting control method provided by the invention.
As shown in fig. 1, according to an embodiment of the present invention, the defrosting control method includes at least step S110, step S120, and step S130.
And step S110, after the air conditioner meets the condition of entering defrosting and enters defrosting, detecting whether the reduction value of the indoor environment temperature during defrosting is larger than or equal to the preset maximum allowable temperature reduction value during defrosting.
Specifically, the air conditioner is started to perform heating operation, and when the air conditioner meets the defrosting condition, the air conditioner is controlled to enter defrosting. In a specific embodiment, the conditions for entering defrosting comprise: the tube temperature of the outdoor heat exchanger is less than a first preset tube temperature threshold value.
And when the air conditioner is not defrosted after being started, determining the first preset pipe temperature threshold value according to the outdoor environment temperature. That is, when the air conditioner is defrosted for the first time, the first preset pipe temperature threshold value is determined according to the outdoor ambient temperature. Specifically, acquiring a corresponding relation between more than two preset outdoor environment temperature intervals and a preset pipe temperature threshold; and acquiring a corresponding first preset pipe temperature threshold value according to the temperature interval of the current outdoor environment temperature in the more than two outdoor environment temperature intervals.
The correspondence between the two or more preset outdoor environment temperature intervals and the tube temperature threshold may specifically be a correspondence table between the two or more preset outdoor environment temperature intervals and the tube temperature threshold. And searching an outdoor environment temperature interval where the current outdoor environment temperature is located from the corresponding relation table by a table searching method according to the current outdoor environment temperature, and determining a corresponding first preset pipe temperature threshold according to the outdoor environment temperature interval where the current outdoor environment temperature is located. For example, table 1 shows the first-time defrost entry conditions.
TOuter ring(℃) TTemperature of outer tube
TOuter ring<-5 D1
-5≤TOuter ring<0 D2
0≤TOuter ring<5 D3
5≤TOuter ring D4
TABLE 1
Referring to Table 1, outdoor ambient temperature TOuter ringCorresponding to different tube temperature thresholds T when the temperature is in different outdoor environment temperature intervalsTemperature of outer tubeWherein D is1<D2<D3<D4. And when defrosting is carried out after the air conditioner is started, determining the first preset pipe temperature threshold value according to a second preset pipe temperature threshold value and a preset correction value in the condition of entering defrosting last time. The method for determining the first preset tube temperature threshold value is consistent with the method for determining the condition that the air conditioner enters the defrosting next time according to the tube temperature difference value between the tube temperature of the outdoor heat exchanger when the air conditioner exits the defrosting this time and the tube temperature of the outdoor heat exchanger when the air conditioner enters the defrosting this time in the following embodiment, which will be described in the following corresponding embodiment.
After the air conditioner enters defrosting, detecting whether a reduction value of the indoor environment temperature during defrosting (namely, relative to the reduction value of the indoor environment temperature during defrosting) reaches a preset maximum allowable temperature reduction value during defrosting. For example, in the defrosting process of the air conditioner, the reduction value DeltaT of the indoor environment temperature is detected at preset time intervalsDefrosting temperature drop(relative toTemperature reduction value at the time of entering defrosting) whether or not the preset maximum allowable temperature reduction value Δ T at the time of defrosting is reachedMaximum allowable temperature drop for defrostingI.e. Delta TDefrosting temperature drop＝TInner ring for defrostingTn to DeltaTMaximum allowable temperature drop for defrostingAnd Tn is the indoor environment temperature detected at the nth time.
In some embodiments, the maximum allowable temperature reduction value during defrosting is determined according to the indoor ambient temperature during defrosting. Specifically, acquiring a corresponding relation between more than two preset indoor environment temperature intervals and a defrosting maximum allowable temperature reduction value; and acquiring a corresponding maximum allowable defrosting temperature reduction value according to the temperature interval of the indoor environment temperature when the defrosting is carried out.
The correspondence between the two or more preset indoor environment temperature intervals and the maximum allowable defrosting temperature reduction value may be specifically a correspondence table between the two or more preset indoor environment temperature intervals and the maximum allowable defrosting temperature reduction value. According to the indoor environment temperature when the defrosting is started, searching an indoor environment temperature interval where the indoor environment temperature when the defrosting is started in the corresponding relation table in a table look-up mode, and determining a corresponding maximum allowable temperature reduction value during the defrosting according to the indoor environment temperature interval. For example, referring to Table 2, Table 2 shows the indoor ambient temperature T as it enters defrostEnter into defrosting inner ringMaximum allowable temperature reduction value Delta T during defrosting corresponding to different indoor environment temperature intervalsMaximum allowable temperature drop for defrostingWherein, T1<T2<T3，A1<A2<A3<A4。
TEnter into defrosting inner ring △TMaximum allowable temperature drop for defrosting
TEnter into defrosting inner ring<T1 A1
T1≤TEnter into defrosting inner ring<T2 A2
T2≤TEnter into defrosting inner ring<T3 A3
T3≤TEnter into defrosting inner ring A4
TABLE 2
When the building load of a room is constant, the reduction amplitude of different indoor environment temperatures at the same time is different, so that the indoor environment temperature T is changed according to the defrosting timeEnter into defrosting inner ringCorresponding maximum operation temperature drop quantity delta T is formulatedMaximum allowable temperature drop for defrosting(i.e., maximum allowable temperature drop upon defrosting). The determination of the maximum allowable temperature reduction value during defrosting is based on human comfort and can be determined through experiments, for example, when the indoor environment temperature is higher, the temperature reduction is less than 2 ℃, human discomfort cannot be caused, and the value range of the maximum allowable temperature reduction value during defrosting comprises: delta TMaximum allowable temperature drop for defrosting≤2℃。
And step S120, judging whether the air conditioner meets the condition of quitting defrosting of the current defrosting after detecting that the reduction value of the indoor environment temperature is greater than or equal to the maximum allowable temperature reduction value during defrosting.
And step S130, if the condition that the air conditioner meets the defrosting quit condition of the current defrosting is judged, controlling the air conditioner to quit defrosting.
For example, when detecting the decrease value DeltaT of the indoor ambient temperatureDefrosting temperature dropMaximum allowable temperature reduction value DeltaT at the time of defrosting corresponding to Table 2Maximum allowable temperature drop for defrostingAnd judging whether the air conditioner meets the condition of quitting defrosting at this time. And if the condition that the air conditioner meets the defrosting quit condition of the current defrosting is judged, controlling the air conditioner to quit defrosting. Optionally, when it is detected that the reduction value of the indoor environment temperature does not reach (is smaller than) the maximum allowable temperature reduction value during defrosting, whether the air conditioner quits defrosting is controlled according to whether the air conditioner meets a set defrosting quit condition. The set defrosting exit condition is specifically a defrosting exit condition of a conventional defrosting logic, namely, the set defrosting exit condition is controlled according to the conventional defrosting logic. The setting of the defrosting exit condition includes, for example, that the outdoor heat exchanger tube temperature is higher than a third preset tube temperature threshold, that is, the defrosting exits when the outdoor heat exchanger tube temperature is higher than the third preset tube temperature threshold.
In some embodiments, the condition for exiting defrosting at this time includes: the temperature difference value between the current outdoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature (called as the outer tube temperature for short) when defrosting is carried out is larger than the sum of the preset temperature difference correction value and the preset temperature difference correction constant.
And if the air conditioner does not meet the condition of quitting defrosting of the current defrosting, controlling whether the air conditioner quits defrosting or not according to whether the air conditioner meets the set condition of quitting defrosting. The set defrosting exit condition is specifically a defrosting exit condition of a conventional defrosting logic, namely, the set defrosting exit condition is controlled according to the conventional defrosting logic. The setting of the defrosting exit condition includes, for example, that the outdoor heat exchanger tube temperature is higher than a third preset tube temperature threshold, that is, the defrosting exits when the outdoor heat exchanger tube temperature is higher than the third preset tube temperature threshold.
For example, when Δ TDefrosting temperature dropTo achieve the delta T in Table 2Maximum allowable temperature drop for defrostingAnd if the temperature difference between the outer tube temperature and the outer tube temperature when the air conditioner enters defrosting is larger than (K + C), K is a preset temperature difference correction value, C is a preset temperature difference correction constant, and if the temperature difference is larger than (K + C), the air conditioner is controlled to exit defrosting.If the sum of the measured temperature and the measured temperature is not greater than (K + C), the defrosting logic is controlled.
Whether the temperature difference is larger than K + C or not is judged firstly for reliability, if the condition is not met, the temperature drop is C (for example, 2 ℃), but the temperature difference between the outer pipe temperature when the outer pipe exits defrosting and the outer pipe temperature when the outer pipe enters defrosting is probably not changed basically, the outer unit basically does not remove much defrosting, the outer unit cannot enter defrosting control of the invention, and the original defrosting logic control is needed. The larger the C, the less likely it is to enter new control logic, and the smaller the C, the more likely it is to cause frequent defrosting.
According to the embodiment of the invention, the defrosting exit time is controlled according to the maximum allowable temperature drop amount during defrosting corresponding to the indoor environment temperature during defrosting, so that the descending amplitude of the room temperature drop is accurately controlled, and the heating comfort is improved.
Fig. 2 is a schematic method diagram of another embodiment of the defrosting control method of the air conditioner provided by the invention. As shown in fig. 2, based on the above-mentioned embodiment, according to another embodiment of the present invention, the defrosting control method further includes step S140.
Step S140, determining the next defrosting condition of the air conditioner according to the pipe temperature difference value between the pipe temperature of the outdoor heat exchanger when the air conditioner exits defrosting and the pipe temperature of the outdoor heat exchanger when the air conditioner enters defrosting.
Specifically, under the condition that the air conditioner meets the condition of exiting defrosting of the current defrosting, the condition that the air conditioner enters defrosting next time is determined according to the pipe temperature difference value between the pipe temperature of the outdoor heat exchanger when the air conditioner exits defrosting and the pipe temperature of the outdoor heat exchanger when the air conditioner enters defrosting.
In some specific embodiments, determining the condition that the air conditioner enters defrosting next time according to the pipe temperature difference value between the pipe temperature of the outdoor heat exchanger when the air conditioner exits defrosting this time and the pipe temperature of the outdoor heat exchanger when the air conditioner enters defrosting this time specifically includes: determining a temperature correction value for correcting the defrosting condition according to the pipe temperature difference value; and correcting the defrosting condition according to the temperature correction value to determine the next defrosting condition of the air conditioner. That is to say, the temperature correction value for correcting the condition that the air conditioner enters the defrosting process at this time is determined according to the pipe temperature difference value between the pipe temperature of the outdoor heat exchanger when the air conditioner exits the defrosting process at this time and the pipe temperature of the outdoor heat exchanger when the air conditioner enters the defrosting process at this time, so that the condition that the air conditioner enters the defrosting process at this time is corrected according to the temperature correction value, and the condition that the air conditioner enters the defrosting process at the next time is obtained.
Specifically, the next defrosting entry condition comprises the following steps: the tube temperature of the outdoor heat exchanger is less than a second preset tube temperature threshold value. And the second preset tube temperature threshold value is equal to the sum of the first preset tube temperature threshold value and the temperature correction value. The first preset tube temperature threshold is the first preset tube temperature threshold in the defrosting entering condition.
The temperature correction value can be determined according to a tube temperature difference value between the tube temperature of the outdoor heat exchanger when the air conditioner exits defrosting at this time and the tube temperature of the outdoor heat exchanger when the air conditioner enters defrosting at this time. In a specific embodiment, the determining, according to the pipe temperature difference value, a temperature correction value for correcting a condition of entering defrosting at this time includes: acquiring the corresponding relation between more than two preset temperature difference value intervals and the temperature correction value; and acquiring a corresponding temperature correction value according to the interval of the tube temperature difference value in the more than two temperature difference value intervals, and determining the temperature correction value as the temperature correction value for correcting the condition of entering defrosting at this time.
The correspondence between the preset two or more temperature difference value intervals and the temperature correction value may be specifically a correspondence table between the two or more preset temperature difference value intervals and the temperature correction value, the temperature difference value interval in which the tube temperature difference value is located is searched in the correspondence table according to the tube temperature difference value between the outdoor heat exchanger tube temperature when the air conditioner exits defrosting this time and the outdoor heat exchanger tube temperature when the air conditioner enters defrosting this time, and the tube temperature difference value Δ T is calculated according to the tube temperature difference value Δ T(temperature difference between the outer tube when the defrosting operation is carried out and entered)And determining a temperature correction value for correcting the tube temperature condition (namely the first preset tube temperature threshold) of the outdoor heat exchanger entering the defrosting at this time in the temperature difference value interval. For example, reference may be made to Table 3, Table 3 showing Δ T(temperature difference between the outer tube when the defrosting operation is carried out and entered)Corresponding temperature correction in different temperature difference intervalsValue TCorrection value for temperatureWherein, T4<T5<T6，B1>B2>B3>B4。
△T(temperature difference between the outer tube when the defrosting operation is carried out and entered) TCorrection value for temperature
△T(temperature difference between the outer tube when the defrosting operation is carried out and entered)<T4 B1
T4≤△T(temperature difference between the outer tube when the defrosting operation is carried out and entered)<T5 B2
T5≤△T(temperature difference between the outer tube when the defrosting operation is carried out and entered)<T6 B3
T6≤△T(temperature difference between the outer tube when the defrosting operation is carried out and entered) B4
TABLE 3
According to the embodiment of the invention, the time for entering the defrosting next time is controlled according to the temperature difference between the temperature of the outdoor heat exchanger tube when the defrosting is exited and the temperature of the outdoor heat exchanger tube when the defrosting is entered, so that the accumulation of a frost layer caused by incomplete defrosting is avoided, and the operation reliability is ensured. Optionally, the preset temperature difference correction value K is greater than or equal to the largest temperature correction value B1 in the corresponding relationship between the preset temperature difference value intervals and the temperature correction values.
When the maximum allowable temperature reduction value is reached during defrosting, the frost of the external unit may not be completely cleaned, and the next defrosting needs to be started in advance. For example, the outer tube temperature is-9 ℃ when the original defrosting logic enters defrosting, the outer tube temperature is 1 ℃ when the original defrosting logic exits defrosting, and the temperature difference between the outer tube temperature when the original defrosting logic exits defrosting and the outer tube temperature when the original defrosting logic enters defrosting is 10 ℃, but the outer tube temperature is-9 ℃ when the original defrosting logic exits defrosting, the temperature difference between the outer tube temperature when the original defrosting logic exits defrosting and the outer tube temperature when the original defrosting logic enters defrosting is-1 ℃, and the temperature difference between the outer tube temperature when the original defrosting logic exits defrosting and the outer tube temperature when the original defrosting logic enters defrosting is 8 ℃, so that the outer defrosting can not be completely defrosted at this time, the user needs to enter next defrosting in advance, and the user passes through TCorrection value for temperatureSo that the next defrosting can be carried out in advance.
The technical scheme of the invention is that the large temperature drop of one-time defrosting is replaced by the small temperature drop of multiple defrosting. For example, the traditional defrosting logic has one defrosting within 60min of operation, and the room temperature is reduced to 6 ℃, while the defrosting logic provided by the method has 3 defrosting within 60min of operation, but the room temperature is reduced to 2 ℃ per defrosting.
In order to clearly illustrate the technical solution of the present invention, the following describes an execution flow of the defrosting control method of the air conditioner according to an embodiment of the present invention.
Fig. 3 is a schematic method diagram of an embodiment of a defrosting control method for an air conditioner according to the present invention. As shown in fig. 3, when the outdoor heat exchanger is started to perform heating operation, the outdoor heat exchanger enters into defrosting for the first time when the tube temperature of the outdoor heat exchanger meets the defrosting condition, and the temperature drop delta T of the inner ring during defrosting is monitored every 5s in real time in the defrosting processDefrosting temperature drop(△TDefrosting temperature drop＝TInner ring for defrostingTn, inner ring temperature at Tn of 5 s) at Δ TDefrosting temperature dropDelta T not reaching the maximum allowable frost-melting temperature dropMaximum allowable temperature drop for defrostingUnder the condition of (1), controlling whether the air conditioner quits defrosting according to whether the condition of quitting defrosting of the original defrosting logic (the conventional defrosting logic) is met, namely controlling whether the air conditioner quits defrosting according to whether the set defrosting quitting condition is met;when Δ TDefrosting temperature dropReaching the maximum allowable frost-melting temperature drop quantity delta TMaximum allowable temperature drop for defrostingCalculating whether the temperature difference between the temperature of the outer pipe and the temperature of the outer pipe when the outer pipe enters defrosting at the moment is larger than (K + C), and if not, controlling whether the air conditioner exits defrosting according to the condition (setting the defrosting exit condition) of the original defrosting logic for exiting defrosting; if yes, controlling the air conditioner to quit defrosting, and calculating the temperature difference delta T between the temperature of the outer pipe when the air conditioner quits defrosting and the temperature of the outer pipe when the air conditioner enters defrosting(temperature difference between the outer tube when the defrosting operation is carried out and entered)Meanwhile, the temperature of the outdoor heat exchanger tube is calculated to meet the condition of entering defrosting when the outdoor heat exchanger tube enters defrosting next time, (. DELTA.T)Outer tube＝△TTemperature of outer tube+TCorrection value for temperatureAnd completing a complete heating cycle, and starting to enter the next heating operation cycle.
For example, in table 1, table 2, table 3, T1, T2, T3 are 15, 20, 27, respectively; a1, A2, A3 and A4 are respectively 0.8, 1.2, 1.6 and 2.0; t4, T5, T6 are 5, 13, 20 respectively; b1, B2, B3 and B4 are respectively 1.5, 1, 0.5 and 0, and T isOuter ringAt-2 deg.C, D1, D2, D3 and D4 are-13, -9, -7 and-5 respectively; the unit of the above parameters is; k is 1.5 ℃ and C is 2 ℃.
When the air conditioning heat is operated for 40min, TOuter ringAt a temperature of-2 ℃ and TTemperature of outer tubeReaching-9 ℃ to meet the defrosting condition, wherein the inner ring temperature is 27 ℃, and delta T is achieved after defrosting is carried out for 5minDefrosting temperature dropThe temperature reached 2.0 ℃ and it is known from Table 1 that. DELTA.T was reachedMaximum allowable temperature drop for defrostingIf the temperature difference between the temperature of the outer pipe and the temperature of the outer pipe when the air conditioner enters the defrosting mode is 8 ℃ and is larger than 3.5 ℃, the air conditioner is controlled to quit the defrosting mode, the temperature drop amplitude of the room at this time is 2.0 ℃, and obvious discomfort can not be caused to a human body. Delta T at the moment of frost removal(temperature difference between the outer tube when the defrosting operation is carried out and entered)At 8 ℃ and T according to Table 2Correction value for temperatureCalculating the T of the next defrostingTemperature of outer tubeAnd at the moment, finishing a heating defrosting period, entering the next heating period, controlling the next defrosting according to the updated parameters, and recycling the process after defrosting is finished.
Fig. 4 is a block diagram of an embodiment of an air conditioner defrosting control device provided by the present invention. As shown in fig. 4, the air conditioning defrosting control apparatus 100 includes a detection unit 110, a judgment unit 120, and a control unit 130.
The detection unit 110 is configured to detect whether a reduction value of the indoor environment temperature during defrosting is greater than or equal to a preset maximum allowable temperature reduction value during defrosting after the air conditioner enters defrosting when meeting a defrosting condition.
Specifically, the air conditioner is started to perform heating operation, and when the air conditioner meets the defrosting condition, the air conditioner is controlled to enter defrosting. In a specific embodiment, the conditions for entering defrosting comprise: the tube temperature of the outdoor heat exchanger is less than a first preset tube temperature threshold value.
And when the air conditioner is not defrosted after being started, determining the first preset pipe temperature threshold value according to the outdoor environment temperature. That is, when the air conditioner is defrosted for the first time, the first preset pipe temperature threshold value is determined according to the outdoor ambient temperature. Specifically, acquiring a corresponding relation between more than two preset outdoor environment temperature intervals and a preset pipe temperature threshold; and acquiring a corresponding first preset pipe temperature threshold value according to the temperature interval of the current outdoor environment temperature in the more than two outdoor environment temperature intervals.
The correspondence between the two or more preset outdoor environment temperature intervals and the tube temperature threshold may specifically be a correspondence table between the two or more preset outdoor environment temperature intervals and the tube temperature threshold. And searching an outdoor environment temperature interval where the current outdoor environment temperature is located from the corresponding relation table by a table searching method according to the current outdoor environment temperature, and determining a corresponding first preset pipe temperature threshold according to the outdoor environment temperature interval where the current outdoor environment temperature is located. For example, table 1 shows the first-time defrost entry conditions. Referring to Table 1, outdoor ambient temperature TOuter ringCorresponding to different tube temperature thresholds T when the temperature is in different outdoor environment temperature intervalsTemperature of outer tubeWherein D is1<D2<D3<D4。
TOuter ring(℃) TTemperature of outer tube
TOuter ring<-5 D1
-5≤TOuter ring<0 D2
0≤TOuter ring<5 D3
5≤TOuter ring D4
TABLE 1
And when defrosting is carried out after the air conditioner is started, determining the first preset pipe temperature threshold value according to a second preset pipe temperature threshold value and a preset correction value in the condition of entering defrosting last time. The method for determining the first preset tube temperature threshold value is consistent with the method for determining the condition that the air conditioner enters the defrosting next time according to the tube temperature difference value between the tube temperature of the outdoor heat exchanger when the air conditioner exits the defrosting this time and the tube temperature of the outdoor heat exchanger when the air conditioner enters the defrosting this time in the following embodiment, which will be described in the following corresponding embodiment.
After the air conditioner enters into defrosting, the detection unit 110 detects whether a reduction value of the indoor ambient temperature at the time of defrosting (i.e., a reduction value of the indoor ambient temperature with respect to the time of entering into defrosting) reaches a preset maximum allowable temperature reduction value at the time of defrosting. For example, in the defrosting process of the air conditioner, the reduction value DeltaT of the indoor environment temperature is detected at preset time intervalsDefrosting temperature drop(phase ofFor the temperature reduction value when entering defrosting) whether the preset maximum allowable temperature reduction value delta T during defrosting is reachedMaximum allowable temperature drop for defrostingI.e. Delta TDefrosting temperature drop＝TInner ring for defrostingTn to DeltaTMaximum allowable temperature drop for defrostingAnd Tn is the indoor environment temperature detected at the nth time.
In some embodiments, the maximum allowable temperature reduction value during defrosting is determined according to the indoor ambient temperature during defrosting. Specifically, acquiring a corresponding relation between more than two preset indoor environment temperature intervals and a defrosting maximum allowable temperature reduction value; and acquiring a corresponding maximum allowable defrosting temperature reduction value according to the temperature interval of the indoor environment temperature when the defrosting is carried out.
The correspondence between the two or more preset indoor environment temperature intervals and the maximum allowable defrosting temperature reduction value may be specifically a correspondence table between the two or more preset indoor environment temperature intervals and the maximum allowable defrosting temperature reduction value. According to the indoor environment temperature when the defrosting is started, searching an indoor environment temperature interval where the indoor environment temperature when the defrosting is started in the corresponding relation table in a table look-up mode, and determining a corresponding maximum allowable temperature reduction value during the defrosting according to the indoor environment temperature interval. For example, referring to Table 2, Table 2 shows the indoor ambient temperature T as it enters defrostEnter into defrosting inner ringMaximum allowable temperature reduction value Delta T during defrosting corresponding to different indoor environment temperature intervalsMaximum allowable temperature drop for defrostingWherein, T1<T2<T3，A1<A2<A3<A4。
TEnter into defrosting inner ring △TMaximum allowable temperature drop for defrosting
TEnter into defrosting inner ring<T1 A1
T1≤TEnter into defrosting inner ring<T2 A2
T2≤TEnter into defrosting inner ring<T3 A3
T3≤TEnter into defrosting inner ring A4
TABLE 2
When the building load of a room is constant, the reduction amplitude of different indoor environment temperatures at the same time is different, so that the indoor environment temperature T is changed according to the defrosting timeEnter into defrosting inner ringCorresponding maximum operation temperature drop quantity delta T is formulatedMaximum allowable temperature drop for defrosting(i.e., maximum allowable temperature drop upon defrosting). The determination of the maximum allowable temperature reduction value during defrosting is based on human comfort and can be determined through experiments, for example, when the indoor environment temperature is higher, the temperature reduction is less than 2 ℃, human discomfort cannot be caused, and the value range of the maximum allowable temperature reduction value during defrosting comprises: delta TMaximum allowable temperature drop for defrosting≤2℃。
The determining unit 120 is configured to determine whether the air conditioner meets a condition of exiting defrosting of this defrosting after the detecting unit 110 detects that the reduction value of the indoor environment temperature is greater than or equal to the maximum allowable temperature reduction value during defrosting. The control unit 130 is configured to control the air conditioner to exit defrosting if the determining unit 120 determines that the air conditioner meets the condition of exiting defrosting of the current defrosting.
For example, when detecting the decrease value DeltaT of the indoor ambient temperatureDefrosting temperature dropMaximum allowable temperature reduction value DeltaT at the time of defrosting corresponding to Table 2Maximum allowable temperature drop for defrostingAnd judging whether the air conditioner meets the condition of quitting defrosting. Optionally, when it is detected that the reduction value of the indoor environment temperature does not reach (is smaller than) the maximum allowable temperature reduction value during defrosting, whether the air conditioner quits defrosting is controlled according to whether the air conditioner meets a set defrosting quit condition. The set defrosting exit condition is specifically a defrosting exit condition of a conventional defrosting logic, namely, the set defrosting exit condition is controlled according to the conventional defrosting logic. The setting of the defrosting exit condition includes, for example, that the outdoor heat exchanger tube temperature is higher than a third preset tube temperature threshold, that is, the defrosting exits when the outdoor heat exchanger tube temperature is higher than the third preset tube temperature threshold.
In some embodiments, the condition for exiting defrosting at this time includes: the temperature difference value between the current outdoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature (called as the outer tube temperature for short) when defrosting is carried out is larger than the sum of the preset temperature difference correction value and the preset temperature difference correction constant.
And if the air conditioner does not meet the condition of quitting defrosting of the current defrosting, controlling whether the air conditioner quits defrosting or not according to whether the air conditioner meets the set condition of quitting defrosting. Namely, if the air conditioner is judged to meet the condition of quitting defrosting of last defrosting, the air conditioner is controlled to quit defrosting, and if the air conditioner is judged not to meet the condition of quitting defrosting of last defrosting, defrosting is continued. The set defrosting exit condition is specifically a defrosting exit condition of a conventional defrosting logic, namely, the set defrosting exit condition is controlled according to the conventional defrosting logic. The setting of the defrosting exit condition includes, for example, that the outdoor heat exchanger tube temperature is higher than a third preset tube temperature threshold, that is, the defrosting exits when the outdoor heat exchanger tube temperature is higher than the third preset tube temperature threshold.
For example, when Δ TDefrosting temperature dropTo achieve the delta T in Table 2Maximum allowable temperature drop for defrostingCalculating whether the temperature difference between the outer tube temperature and the outer tube temperature during defrosting is greater than (K + C), and if so, determining that the temperature difference is greater than (K + C)If the air temperature is higher than (B + C), the air conditioner is controlled to quit defrosting. If the sum of the measured temperature and the measured temperature is not greater than (K + C), the defrosting logic is controlled.
Whether the temperature difference is larger than K + C or not is judged firstly for reliability, if the condition is not met, the temperature drop is C (for example, 2 ℃), but the temperature difference between the outer pipe temperature when the outer pipe is removed from defrosting and the outer pipe temperature when the outer pipe enters defrosting is probably not changed basically, the outer unit basically does not remove much frost, and the outer unit cannot enter new defrosting control at this time and needs to be controlled by the original defrosting logic (the last defrosting logic). The larger the C, the less likely it is to enter new control logic, and the smaller the C, the more likely it is to cause frequent defrosting.
According to the embodiment of the invention, the defrosting exit time is controlled according to the maximum allowable temperature drop amount during defrosting corresponding to the indoor environment temperature during defrosting, so that the descending amplitude of the room temperature drop is accurately controlled, and the heating comfort is improved.
Fig. 5 is a block diagram of another embodiment of an air conditioner defrosting control device provided by the invention. As shown in fig. 5, the air conditioning defrosting control apparatus 100 further includes a determination unit 140.
The determining unit 140 is configured to determine a next defrosting condition of the air conditioner according to a pipe temperature difference value between the pipe temperature of the outdoor heat exchanger when the air conditioner exits defrosting this time and the pipe temperature of the outdoor heat exchanger when the air conditioner enters defrosting this time.
Specifically, in a case that it is determined that the air conditioner satisfies the condition of exiting defrosting of the current defrosting, the determining unit 140 determines the condition of entering defrosting of the air conditioner next time according to a pipe temperature difference value between the pipe temperature of the outdoor heat exchanger when the air conditioner exits defrosting this time and the pipe temperature of the outdoor heat exchanger when the air conditioner enters defrosting this time.
In some specific embodiments, the determining unit 140 determines the condition that the air conditioner enters defrosting next time according to a pipe temperature difference value between the pipe temperature of the outdoor heat exchanger when the air conditioner exits defrosting this time and the pipe temperature of the outdoor heat exchanger when the air conditioner enters defrosting this time, where the determining unit includes: determining a temperature correction value for correcting the defrosting condition according to the pipe temperature difference value; and correcting the defrosting condition according to the temperature correction value to determine the next defrosting condition of the air conditioner. That is to say, the temperature correction value for correcting the condition that the air conditioner enters the defrosting process at this time is determined according to the pipe temperature difference value between the pipe temperature of the outdoor heat exchanger when the air conditioner exits the defrosting process at this time and the pipe temperature of the outdoor heat exchanger when the air conditioner enters the defrosting process at this time, so that the condition that the air conditioner enters the defrosting process at this time is corrected according to the temperature correction value, and the condition that the air conditioner enters the defrosting process at the next time is obtained.
Specifically, the next defrosting entry condition comprises the following steps: the tube temperature of the outdoor heat exchanger is less than a second preset tube temperature threshold value. And the second preset tube temperature threshold value is equal to the sum of the first preset tube temperature threshold value and the temperature correction value. The first preset tube temperature threshold is the first preset tube temperature threshold in the defrosting entering condition.
The temperature correction value can be determined according to a tube temperature difference value between the tube temperature of the outdoor heat exchanger when the air conditioner exits defrosting at this time and the tube temperature of the outdoor heat exchanger when the air conditioner enters defrosting at this time. In a specific embodiment, the determining unit 140 determines, according to the pipe temperature difference value, a temperature correction value for correcting the condition of entering defrosting at this time, including: acquiring the corresponding relation between more than two preset temperature difference value intervals and the temperature correction value; and acquiring a corresponding temperature correction value according to the interval of the tube temperature difference value in the more than two temperature difference value intervals, and determining the temperature correction value as the temperature correction value for correcting the condition of entering defrosting at this time.
The correspondence between the preset two or more temperature difference value intervals and the temperature correction value may be specifically a correspondence table between the two or more preset temperature difference value intervals and the temperature correction value, the temperature difference value interval in which the tube temperature difference value is located is searched in the correspondence table according to the tube temperature difference value between the outdoor heat exchanger tube temperature when the air conditioner exits defrosting this time and the outdoor heat exchanger tube temperature when the air conditioner enters defrosting this time, and the tube temperature difference value Δ T is calculated according to the tube temperature difference value Δ T(temperature difference between the outer tube when the defrosting operation is carried out and entered)And determining a temperature correction value for correcting the tube temperature condition (namely the first preset tube temperature threshold) of the outdoor heat exchanger entering the defrosting at this time in the temperature difference value interval. For example, reference may be made to Table 3, Table 3 showing Δ T(outside of the time of exiting and entering defrostingPipe temperature difference)Corresponding temperature correction value T in different temperature difference value intervalsCorrection value for temperatureWherein, T4<T5<T6，B1>B2>B3>B4。
△T(temperature difference between the outer tube when the defrosting operation is carried out and entered) TCorrection value for temperature
△T(temperature difference between the outer tube when the defrosting operation is carried out and entered)<T4 B1
T4≤△T(temperature difference between the outer tube when the defrosting operation is carried out and entered)<T5 B2
T5≤△T(temperature difference between the outer tube when the defrosting operation is carried out and entered)<T6 B3
T6≤△T(temperature difference between the outer tube when the defrosting operation is carried out and entered) B4
TABLE 3
According to the embodiment of the invention, the time for entering the defrosting next time is controlled according to the temperature difference between the temperature of the outdoor heat exchanger tube when the defrosting is exited and the temperature of the outdoor heat exchanger tube when the defrosting is entered, so that the accumulation of a frost layer caused by incomplete defrosting is avoided, and the operation reliability is ensured. Optionally, the preset temperature difference correction value K is greater than or equal to the largest temperature correction value B1 in the corresponding relationship between the preset temperature difference value intervals and the temperature correction values.
When the maximum allowable temperature reduction value is reached during defrosting, the frost of the external unit may not be completely cleaned, and the next defrosting needs to be started in advance. For example, the outer tube temperature is-9 ℃ when the original defrosting logic (last time) enters defrosting, the outer tube temperature is 1 ℃ when the defrosting logic exits, the temperature difference between the outer tube temperature when the defrosting logic exits and the outer tube temperature when the defrosting logic enters is 10 ℃, but the outer tube temperature is-9 ℃ when the defrosting logic (this time) enters defrosting, the temperature difference between the outer tube temperature when the defrosting logic exits and the outer tube temperature when the defrosting logic enters is-1 ℃ when the defrosting logic exits, the temperature difference between the outer tube temperature when the defrosting logic exits and the outer tube temperature when the defrosting logic enters is 8 ℃, so that the outer defrosting logic may not be completely finished at this time, the outer defrosting logic needs to enter next defrosting in advance, and the defrosting logic passes through TCorrection value for temperatureSo that the next defrosting can be carried out in advance.
The invention also provides a storage medium corresponding to the air conditioner defrosting control method, and a computer program is stored on the storage medium, and when the program is executed by a processor, the program realizes the steps of any one of the methods.
The invention also provides an air conditioner corresponding to the defrosting control method of the air conditioner, which comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of any one of the methods when executing the program.
The invention also provides an air conditioner corresponding to the air conditioner defrosting control device, which comprises the air conditioner defrosting control device.
Therefore, according to the scheme provided by the invention, the defrosting exit time is controlled according to the maximum allowable temperature drop amount during defrosting corresponding to the indoor environment temperature during defrosting, the falling amplitude of the room temperature drop can be accurately controlled, and the heating comfort is improved. According to the technical scheme of the invention, the time for entering the defrosting next time is controlled according to the temperature difference between the pipe temperature of the outdoor heat exchanger when the defrosting is exited and the pipe temperature of the outdoor heat exchanger when the defrosting is entered, so that the accumulation of frost layers caused by incomplete defrosting is avoided, and the running reliability of the air conditioner is ensured.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. 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 Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (16)

1. An air conditioner defrosting control method is characterized by comprising the following steps:
when the air conditioner meets the condition of entering defrosting and enters defrosting, detecting whether the reduction value of the indoor environment temperature during defrosting is greater than or equal to the preset maximum allowable temperature reduction value during defrosting;
when the fact that the reduction value of the indoor environment temperature is larger than or equal to the maximum allowable temperature reduction value during defrosting is detected, whether the air conditioner meets the condition that the defrosting exits in the current defrosting is judged;
and if the condition that the air conditioner meets the defrosting quit condition of the current defrosting is judged, controlling the air conditioner to quit defrosting.
2. The method of claim 1,
the defrosting entry condition comprises the following steps: the tube temperature of the outdoor heat exchanger is less than a first preset tube temperature threshold value;
and when defrosting is not performed after the air conditioner is started, determining the first preset pipe temperature threshold value according to the outdoor environment temperature.
3. The method of claim 2, further comprising:
determining the next defrosting entry condition of the air conditioner according to the tube temperature difference value between the tube temperature of the outdoor heat exchanger when the air conditioner exits defrosting and the tube temperature of the outdoor heat exchanger when the air conditioner enters defrosting, wherein the defrosting entry condition comprises the following steps:
determining a temperature correction value for correcting the defrosting condition according to the pipe temperature difference value;
correcting the defrosting condition according to the temperature correction value to determine the next defrosting condition of the air conditioner;
wherein the next defrosting entering condition comprises the following steps: the tube temperature of the outdoor heat exchanger is less than a second preset tube temperature threshold value; the second preset tube temperature threshold value is equal to the sum of the first preset tube temperature threshold value and the temperature correction value.
4. The method according to claim 3, wherein determining a temperature correction value for correcting the condition of entering defrosting according to the pipe temperature difference value comprises:
acquiring the corresponding relation between more than two preset temperature difference value intervals and the temperature correction value;
and acquiring a corresponding temperature correction value according to the interval of the tube temperature difference value in the more than two temperature difference value intervals, and determining the temperature correction value as the temperature correction value for correcting the condition of entering defrosting at this time.
5. The method of any one of claims 2-4, wherein determining the first preset tube temperature threshold based on an outdoor ambient temperature comprises:
acquiring corresponding relations between more than two preset outdoor environment temperature intervals and a pipe temperature threshold;
and acquiring a corresponding first preset pipe temperature threshold value according to the temperature interval of the current outdoor environment temperature in the more than two outdoor environment temperature intervals.
6. The method according to any one of claims 1 to 5, wherein said conditions for defrosting exit comprise:
the temperature difference value between the current outdoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature when defrosting enters is larger than the sum of the preset temperature difference correction value and the preset temperature difference correction constant.
7. The method according to any one of claims 1 to 6, wherein the maximum allowable temperature reduction upon defrosting is determined according to the indoor ambient temperature upon entering defrosting, and comprises:
acquiring corresponding relations between more than two preset indoor environment temperature intervals and a defrosting maximum allowable temperature reduction value;
and acquiring a corresponding maximum allowable defrosting temperature reduction value according to the temperature interval of the indoor environment temperature when the defrosting is carried out.
8. An air conditioner defrosting control device is characterized by comprising:
the detection unit is used for detecting whether the reduction value of the indoor environment temperature during defrosting is greater than or equal to the preset maximum allowable temperature reduction value during defrosting after the air conditioner enters the defrosting mode when meeting the defrosting condition;
the judging unit is used for judging whether the air conditioner meets the condition of quitting defrosting of the current defrosting after the detecting unit detects that the reduction value of the indoor environment temperature is greater than or equal to the maximum allowable temperature reduction value during defrosting;
and the control unit is used for controlling the air conditioner to quit defrosting if the judgment unit judges that the air conditioner meets the defrosting quitting condition of the current defrosting.
9. The apparatus of claim 8,
the defrosting entry condition comprises the following steps: the tube temperature of the outdoor heat exchanger is less than a first preset tube temperature threshold value;
and when defrosting is not performed after the air conditioner is started, determining the first preset pipe temperature threshold value according to the outdoor environment temperature.
10. The apparatus of claim 9, further comprising:
the determining unit is used for determining the next defrosting entry condition of the air conditioner according to the pipe temperature difference value between the pipe temperature of the outdoor heat exchanger when the air conditioner exits defrosting and the pipe temperature of the outdoor heat exchanger when the air conditioner enters defrosting, and comprises the following steps:
determining a temperature correction value for correcting the defrosting condition according to the pipe temperature difference value;
correcting the defrosting condition according to the temperature correction value to determine the next defrosting condition of the air conditioner;
wherein the next defrosting entering condition comprises the following steps: the tube temperature of the outdoor heat exchanger is less than a second preset tube temperature threshold value; the second preset tube temperature threshold value is equal to the sum of the first preset tube temperature threshold value and the temperature correction value.
11. The apparatus according to claim 10, wherein the determining unit determines a temperature correction value for correcting the condition of entering the defrosting currently according to the pipe temperature difference value, and includes:
acquiring the corresponding relation between more than two preset temperature difference value intervals and the temperature correction value;
and acquiring a corresponding temperature correction value according to the interval of the tube temperature difference value in the more than two temperature difference value intervals, and determining the temperature correction value as the temperature correction value for correcting the condition of entering defrosting at this time.
12. The apparatus of any one of claims 9-11, wherein determining the first preset tube temperature threshold based on an outdoor ambient temperature comprises:
acquiring corresponding relations between more than two preset outdoor environment temperature intervals and a pipe temperature threshold;
and acquiring a corresponding first preset pipe temperature threshold value according to the temperature interval of the current outdoor environment temperature in the more than two outdoor environment temperature intervals.
13. The apparatus of any one of claims 8-12, wherein the condition for exiting defrosting comprises:
the temperature difference value between the current outdoor heat exchanger tube temperature and the outdoor heat exchanger tube temperature when defrosting enters is larger than the sum of the preset temperature difference correction value and the preset temperature difference correction constant.
14. The apparatus according to any one of claims 8 to 13, wherein the maximum allowable temperature reduction upon defrosting is determined according to an indoor ambient temperature upon entering defrosting, and comprises:
acquiring corresponding relations between more than two preset indoor environment temperature intervals and a defrosting maximum allowable temperature reduction value;
and acquiring a corresponding maximum allowable defrosting temperature reduction value according to the temperature interval of the indoor environment temperature when the defrosting is carried out.
15. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
16. An air conditioner, comprising a processor, a memory and a computer program stored in the memory and operable on the processor, wherein the processor executes the program to implement the steps of the method as claimed in any one of claims 1 to 7, or comprises the defrosting control device of the air conditioner as claimed in any one of claims 8 to 14.
CN202110618216.4A 2021-05-31 2021-05-31 Air conditioner defrosting control method and device, storage medium and air conditioner Withdrawn CN113339940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110618216.4A CN113339940A (en) 2021-05-31 2021-05-31 Air conditioner defrosting control method and device, storage medium and air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110618216.4A CN113339940A (en) 2021-05-31 2021-05-31 Air conditioner defrosting control method and device, storage medium and air conditioner

Publications (1)

Publication Number Publication Date
CN113339940A true CN113339940A (en) 2021-09-03

Family

ID=77473138

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110618216.4A Withdrawn CN113339940A (en) 2021-05-31 2021-05-31 Air conditioner defrosting control method and device, storage medium and air conditioner

Country Status (1)

Country Link
CN (1) CN113339940A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010038518A1 (en) * 2008-10-01 2010-04-08 シャープ株式会社 Air conditioner
CN104676991A (en) * 2013-11-26 2015-06-03 珠海格力电器股份有限公司 Air conditioner and defrosting method thereof
CN106524446A (en) * 2017-01-10 2017-03-22 美的集团武汉制冷设备有限公司 Air conditioner and control method and system thereof
CN110470019A (en) * 2019-08-03 2019-11-19 青岛海尔空调器有限总公司 Control method and device, air-conditioning for air-conditioner defrosting
CN110701728A (en) * 2019-08-27 2020-01-17 珠海格力电器股份有限公司 Defrosting control method based on room cooling, computer readable storage medium and air conditioner
CN110762758A (en) * 2019-11-07 2020-02-07 宁波奥克斯电气股份有限公司 Defrosting control method and device of air conditioner and air conditioner
CN111895596A (en) * 2019-05-06 2020-11-06 青岛海尔空调器有限总公司 Control method and device for defrosting of air conditioner and air conditioner
CN112728721A (en) * 2020-12-23 2021-04-30 珠海格力电器股份有限公司 Air conditioner, composite defrosting control method and device thereof, and storage medium

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010038518A1 (en) * 2008-10-01 2010-04-08 シャープ株式会社 Air conditioner
CN104676991A (en) * 2013-11-26 2015-06-03 珠海格力电器股份有限公司 Air conditioner and defrosting method thereof
CN106524446A (en) * 2017-01-10 2017-03-22 美的集团武汉制冷设备有限公司 Air conditioner and control method and system thereof
CN111895596A (en) * 2019-05-06 2020-11-06 青岛海尔空调器有限总公司 Control method and device for defrosting of air conditioner and air conditioner
CN110470019A (en) * 2019-08-03 2019-11-19 青岛海尔空调器有限总公司 Control method and device, air-conditioning for air-conditioner defrosting
CN110701728A (en) * 2019-08-27 2020-01-17 珠海格力电器股份有限公司 Defrosting control method based on room cooling, computer readable storage medium and air conditioner
CN110762758A (en) * 2019-11-07 2020-02-07 宁波奥克斯电气股份有限公司 Defrosting control method and device of air conditioner and air conditioner
CN112728721A (en) * 2020-12-23 2021-04-30 珠海格力电器股份有限公司 Air conditioner, composite defrosting control method and device thereof, and storage medium

Similar Documents

Publication Publication Date Title
CN112539521B (en) Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof
CN110567090A (en) Air conditioner detection temperature compensation method and device, storage medium and air conditioner
CN112050369B (en) Control method and control device for defrosting of air conditioner and air conditioner
CN111895593B (en) Control method and device for defrosting of air conditioner and air conditioner
CN109373540B (en) Air conditioner control method and system and air conditioner
CN110567085B (en) Air conditioner monitoring method and device and air conditioner
CN112283878B (en) Air conditioner control method and device, storage medium and air conditioner
CN110848882A (en) Air conditioner and self-cleaning control method and device thereof
CN111720952A (en) Multi-fan air conditioner defrosting method and air conditioner
CN111895596B (en) Control method and device for defrosting of air conditioner and air conditioner
CN112413735A (en) Fresh air conditioner control method and device, storage medium and fresh air conditioner
CN108644971B (en) Control method and device for defrosting of air conditioner, storage medium and processor
CN112880125A (en) Air conditioner control method and device, storage medium and air conditioner
CN110081560B (en) Method and device for adjusting running frequency of fan
CN110895027A (en) Defrosting control method and device, storage medium and processor
CN113339940A (en) Air conditioner defrosting control method and device, storage medium and air conditioner
CN111895600B (en) Control method and device for defrosting of air conditioner and air conditioner
CN111895601A (en) Control method and device for defrosting of air conditioner and air conditioner
CN111895597A (en) Control method and device for defrosting of air conditioner and air conditioner
CN111895602A (en) Control method and device for defrosting of air conditioner and air conditioner
CN111076382B (en) Fan coil cold-wind-proof control method and device, medium and water multi-connected air conditioning system
CN111895591B (en) Control method and device for defrosting of air conditioner and air conditioner
CN111895599B (en) Control method and device for defrosting of air conditioner and air conditioner
CN110726224A (en) Air conditioner control method and device, storage medium and air conditioner
CN111059728B (en) Air conditioner control method and device, storage medium and air conditioner

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20210903

WW01 Invention patent application withdrawn after publication