CN111023453A - Air conditioner defrosting control method and device, air conditioner and storage medium - Google Patents
Air conditioner defrosting control method and device, air conditioner and storage medium Download PDFInfo
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- CN111023453A CN111023453A CN201911355320.8A CN201911355320A CN111023453A CN 111023453 A CN111023453 A CN 111023453A CN 201911355320 A CN201911355320 A CN 201911355320A CN 111023453 A CN111023453 A CN 111023453A
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Combustion & Propulsion (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner defrosting control method, an air conditioner defrosting control device, an air conditioner and a storage medium, wherein the air conditioner defrosting control method comprises the following steps: when the air conditioner is in a defrosting mode, acquiring the temperature of an outdoor coil; judging whether the temperature of the outdoor coil pipe meets a preset first exit condition or not; if not, acquiring the temperature of the fins of the outdoor heat exchanger; judging whether the air conditioner meets a preset second exit condition or not based on the fin temperature and the outdoor coil temperature; and if so, controlling the air conditioner to exit the defrosting mode. The invention can avoid frost-free defrosting, reduce defrosting time and improve user experience.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to an air conditioner defrosting control method and device, an air conditioner and a storage medium.
Background
When the air conditioner is in heating operation, the outdoor heat exchanger evaporates and absorbs heat, the surface temperature is lower than the outdoor environment temperature, the frosting phenomenon is possibly caused, and the air conditioner needs to be controlled to enter a refrigeration mode to defrost the outdoor heat exchanger.
Generally, the timing for exiting defrosting is determined based on the outdoor coil temperature, and defrosting is exited when the outdoor coil temperature is detected to reach a certain value. However, since the outdoor coil is often disposed at the outlet of the outdoor heat exchanger or in the supercooling section, the case is easily found: when the actual defrosting of the air conditioner is finished, the temperature of the outdoor coil does not reach the preset value, the air conditioner cannot quit defrosting, and no defrosting occurs.
Disclosure of Invention
The invention solves the problem that the actual defrosting of the air conditioner is finished, but the temperature of the outdoor coil does not reach the preset value, and the air conditioner cannot quit the defrosting in time.
In order to solve the above problems, the present invention provides a defrosting control method for an air conditioner, comprising:
when the air conditioner is in a defrosting mode, acquiring the temperature of an outdoor coil;
judging whether the temperature of the outdoor coil pipe meets a preset first exit condition or not;
if not, acquiring the temperature of the fins of the outdoor heat exchanger;
judging whether the air conditioner meets a preset second exit condition or not based on the fin temperature and the outdoor coil temperature;
and if so, controlling the air conditioner to exit the defrosting mode.
Whether the air conditioner meets the condition of quitting defrosting is judged on the basis of the temperature of the outdoor coil, when the air conditioner meets the condition of quitting defrosting on the basis of the temperature of the outdoor coil, the air conditioner is controlled to directly quit defrosting, the subsequent step of obtaining the temperature of the fins is not needed, running resources can be saved, when the air conditioner does not meet the condition of quitting defrosting on the basis of the temperature of the outdoor coil, the defrosting state of the air conditioner is further detected on the basis of the temperature of the fins, whether the actual defrosting of the air conditioner is finished is judged, namely whether the defrosting phenomenon without frost occurs is judged, if yes, the air conditioner is controlled to quit defrosting, defrosting time is shortened, meanwhile, a refrigeration mode is adopted during defrosting, and indoor cold air is blown, so that the defrosting time is shortened, and the comfort of users is.
Optionally, the determining whether the air conditioner satisfies a preset second exit condition based on the fin temperature and the outdoor coil temperature includes:
calculating a difference between the fin temperature and the outdoor coil temperature;
and when the difference value is greater than or equal to a preset first temperature difference, judging that the air conditioner meets a preset second exit condition.
Whether the air conditioner meets the second quitting condition or not is judged through the difference value of the fin temperature and the outdoor coil temperature, whether defrosting of the air conditioner is actually completed or not is identified, calculation is simple, implementation is simple, and accuracy is high.
Optionally, the first temperature difference is 3-5 ℃. By selecting a proper temperature difference value, the actual defrosting completion time of the air conditioner is determined in time, and then the defrosting quitting time is determined.
Optionally, after determining whether the air conditioner satisfies a preset second exit condition based on the fin temperature and the outdoor coil temperature, the method includes:
and when the air conditioner does not meet the preset second quitting condition, returning to the step of judging whether the temperature of the outdoor coil meets the preset first quitting condition or not. So as to determine the proper defrosting quit time in time and avoid resource waste.
Optionally, the first exit condition is that the outdoor coil temperature is greater than or equal to a preset defrosting exit temperature; after the controlling the air conditioner to exit the defrosting mode, the method further comprises the following steps:
acquiring the temperature of an outdoor coil pipe when the air conditioner exits a defrosting mode;
and updating the preset defrosting exit temperature to the outdoor coil temperature when the air conditioner exits the defrosting mode.
Through real-time detection, when the actual defrosting of the air conditioner is finished but the temperature of the outdoor coil does not reach the preset defrosting exit temperature, the air conditioner automatically records the temperature of the outdoor coil when the actual defrosting is finished, namely when the air conditioner meets the preset second exit condition, the temperature of the external coil when the air conditioner exits the defrosting, and the temperature of the outdoor coil is used as the latest preset defrosting exit temperature so as to update defrosting parameters in real time and reduce frostless defrosting.
Optionally, the first exit condition is that the outdoor coil temperature is greater than or equal to a preset defrosting exit temperature; the judging whether the air conditioner meets a preset second exit condition or not based on the fin temperature and the outdoor coil temperature comprises:
when the outdoor coil temperature is greater than the preset temperature, and the difference value between the fin temperature and the outdoor coil temperature is greater than or equal to the preset second temperature difference, the air conditioner is judged to meet the preset second exit condition, wherein the preset temperature is less than the preset defrosting exit temperature.
Through being greater than the outdoor coil temperature and predetermineeing the temperature, with the difference value of fin temperature with outdoor coil temperature is greater than or equal to predetermined second difference in temperature combination and is regarded as predetermined second and withdraw from the condition, improves the accuracy that changes the frost and withdraw from the condition, avoids appearing actually not changing the frost and accomplishes, nevertheless judges that the air conditioner changes the frost and accomplishes, appears frequently changing the problem of frost.
Optionally, the determining whether the outdoor coil temperature meets a preset first exit condition includes:
and if the temperature of the outdoor coil pipe meets a preset first exit condition, controlling the air conditioner to exit a defrosting mode, so that the phenomenon of frost-free defrosting can be avoided.
The invention also provides a defrosting control device of the air conditioner, which comprises the following components:
an acquisition unit for acquiring an outdoor coil temperature when the air conditioner is in a defrosting mode;
the judging unit is used for judging whether the temperature of the outdoor coil pipe meets a preset first exit condition or not;
the obtaining unit is further configured to obtain a fin temperature of the outdoor heat exchanger if the outdoor coil temperature does not meet a preset first exit condition;
the judging unit is further used for judging whether the air conditioner meets a preset second exit condition or not based on the fin temperature and the outdoor coil temperature;
and the control unit is used for controlling the air conditioner to exit the defrosting mode if the air conditioner meets a preset second exit condition.
The invention also provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the defrosting control method of the air conditioner.
The invention also provides a computer readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the air conditioner defrosting control method is realized.
Drawings
FIG. 1 is a schematic view of an embodiment of a defrosting control method for an air conditioner according to the present invention;
FIG. 2 is a schematic diagram of a step S40 of the defrosting control method of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a schematic view of another embodiment of a defrosting control method for an air conditioner according to the present invention;
FIG. 4 is a schematic diagram illustrating an example of a defrosting control method for an air conditioner according to the present invention;
FIG. 5 is a schematic view of an embodiment of a defrosting control device of an air conditioner according to the present invention;
FIG. 6 is a schematic view of an air conditioner according to an embodiment of the present invention;
fig. 7 is a schematic view of an air conditioner according to another embodiment of the present invention.
Description of reference numerals:
101-acquisition unit, 102-determination unit, 103-control unit, 201-computer-readable storage medium, 202-processor.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The invention provides a defrosting control method for an air conditioner. FIG. 1 is a schematic diagram of an embodiment of a defrosting control method for an air conditioner according to the present invention.
As shown in fig. 1, the air conditioner defrosting control method includes:
step S10, when the air conditioner is in defrosting mode, obtaining the temperature of the outdoor coil;
when the air conditioner is in a defrosting mode, the air conditioner operates in a refrigerating mode, the outdoor heat exchanger is condensed to release heat, so that the temperature of a coil pipe and the temperature of fins of the outdoor heat exchanger are both increased, a frost layer is gradually melted until the air conditioner meets the condition of quitting defrosting, the air conditioner quits the defrosting mode, and heating is carried out normally.
When the air conditioner is in a defrosting mode, the temperature of the outdoor coil is acquired, whether the air conditioner meets a defrosting exit condition or not is judged according to the temperature of the outdoor coil, wherein the temperature of the outdoor coil can be acquired regularly or in real time, and/or the follow-up judgment whether the defrosting exit condition is met or not is executed regularly or in real time. The detection value of the temperature sensor at the outdoor coil can be directly obtained to be used as the temperature of the outdoor coil, the average value of a plurality of sampling values of the temperature of the outdoor coil (such as all temperature sampling values or a plurality of continuous temperature sampling values in a period of time) can also be calculated, and the average value is used as the temperature of the outdoor coil for subsequent judgment, so that the accuracy of the obtained temperature of the outdoor coil is improved.
Optionally, in order to save resources, after the air conditioner enters the defrosting mode for a certain time (for example, after 2-3 min), the temperature of the outdoor coil is acquired. Because a certain time is needed from the time when the air conditioner enters the defrosting mode to the time when the temperature of the outdoor coil rises, the temperature of the outdoor coil is acquired after the air conditioner enters the defrosting mode for a certain time to perform subsequent judgment, so that the situation that the air conditioner executes useless acquiring and judging steps (steps S10-S20) due to the fact that the time for entering the defrosting mode is too short, the temperature of the outdoor coil does not rise or the rising amplitude is too small can be avoided.
Step S20, judging whether the outdoor coil temperature meets a preset first exit condition;
the preset first exiting condition may be that the outdoor coil temperature is greater than or equal to a preset defrosting exiting threshold (e.g. 8-13 ℃), or that the outdoor coil temperature continues for a certain time period and is greater than or equal to the preset defrosting exiting threshold, e.g. greater than or equal to 8 ℃ and continues for more than 60S, or greater than or equal to 12 ℃ and continues for more than 10S.
If the temperature of the outdoor coil meets the preset first exit condition, the fact that the air conditioner actually defrosts is finished is indicated, and at the moment, the air conditioner can be controlled to exit defrosting, so that the air conditioner can be controlled to exit defrosting in time, and the phenomenon of frostless defrosting is avoided.
Step S30, if not, acquiring the temperature of the fins of the outdoor heat exchanger;
if the outdoor coil temperature does not meet the preset first exit condition, it is indicated that whether the air conditioner is currently defrosted cannot be judged only based on the outdoor coil temperature, the actual defrosting condition of the air conditioner needs to be further judged based on the fin temperature, and whether the air conditioner is actually defrosted is judged.
And adding a temperature sensing logic at the fin side of the outdoor heat exchanger, detecting the temperature of the fins in real time/at regular time, and judging whether the air conditioner actually finishes defrosting or not when the temperature of the outdoor coil does not meet a preset first exit condition (for example, the temperature of the outdoor coil does not reach the defrosting exit temperature) based on the temperature of the fins.
The detection value of the temperature sensor on the fin side can be directly obtained to be used as the fin temperature, and the average value of a plurality of sampling values (such as all temperature sampling values or a plurality of continuous temperature sampling values in a period of time) of the temperature sensor on the fin side can be used as the fin temperature obtained here, so that the accuracy of the obtained outdoor coil temperature is improved. Alternatively, a plurality of temperature sensors may be provided on the fin side, and the average value of the detection values of the plurality of temperature sensors may be used as the fin temperature acquired here, so as to improve the accuracy of the acquired outdoor coil temperature.
From the beginning of the defrosting stage of the air conditioner to the end of defrosting, a certain time period needs to elapse, namely, a certain time is needed for defrosting completion. In the process, the temperature of the outdoor coil pipe is slowly increased along with the increase of time, if the actual defrosting of the air conditioner is finished, the temperature of the outdoor coil pipe is not too low, namely is larger than a certain temperature value, if the temperature of the outdoor coil pipe is too low and is smaller than the certain temperature value, the fact that the defrosting of the air conditioner cannot be finished is indicated, at the moment, the temperature of the fins does not need to be acquired, and whether the defrosting of the air conditioner is finished actually or not is judged based on the temperature of the. Therefore, the temperature of the fins of the outdoor heat exchanger and the subsequent steps can be obtained after the temperature of the outdoor coil pipe is higher than a certain preset temperature value, so that unnecessary operation resource consumption is avoided.
Step S40, judging whether the air conditioner meets a preset second exit condition based on the fin temperature and the outdoor coil temperature;
after the outdoor coil temperature is determined not to satisfy the first exit condition, it is determined whether defrosting of the air conditioner is actually completed based on the fin temperature and the outdoor coil temperature, and when the air conditioner satisfies a preset second exit condition, it is indicated that defrosting of the air conditioner is actually completed, at this time, step S50 may be executed: and controlling the air conditioner to exit the defrosting mode. When the air conditioner does not meet the preset second exit condition, the fact that defrosting of the air conditioner is not completed actually is indicated, at the moment, the air conditioner needs to be controlled to continuously defrost, and defrosting can be performed for a certain time period again, and then the air conditioner directly exits defrosting.
In an alternative embodiment, the preset second exit condition is that the difference between the temperature of the fin and the temperature of the outdoor coil is greater than or equal to a preset temperature difference, where the difference between the temperature of the fin and the temperature of the outdoor coil refers to the difference between the temperature of the fin and the temperature of the outdoor coil, or the absolute value of the difference between the temperature of the fin and the temperature of the outdoor coil.
In an alternative embodiment, the second predetermined exit condition is that the ratio of the fin temperature to the outdoor coil temperature is greater than or equal to a predetermined ratio, where the ratio of the fin temperature to the outdoor coil temperature refers to the ratio of the fin temperature as a molecule to the outdoor coil temperature.
In an alternative embodiment, the preset second exit condition is that the temperature of the fins is higher than a preset first temperature, and the temperature of the outdoor coil is lower than a preset second temperature, wherein the first temperature is higher than the second temperature, and a difference obtained by subtracting the second temperature from the first temperature is larger than a preset difference, wherein the preset difference is optionally 3-5 ℃.
Optionally, step S40 is followed by:
and when the air conditioner does not meet the preset second quitting condition, returning to the step of judging whether the temperature of the outdoor coil meets the preset first quitting condition or not.
If the air conditioner does not satisfy the second predetermined exiting condition, the process may return to step S20, that is, the step of determining whether the outdoor coil temperature satisfies the first predetermined exiting condition may be performed, and a suitable defrosting exiting time may be determined in time to avoid resource waste.
The defrosting exit threshold of the outdoor coil temperature is usually determined by experimental tests of developers in a development stage, however, when the air conditioner is put into practical use, the change of the internal and external environments of the air conditioner or other faults (such as poor heat conduction) may cause that the defrosting exit threshold of the outdoor coil temperature determined in development is no longer the most suitable threshold, which may cause the situation that the defrosting of the air conditioner is actually finished and the outdoor coil temperature does not reach the preset defrosting exit threshold, and further cause that the air conditioner cannot exit the defrosting in time and the phenomenon of no defrosting occurs. In order to reduce the continuous time of frost-free defrosting, the air conditioner exits the defrosting mode in time after defrosting is finished, the temperature of the fins is introduced, the actual defrosting condition of the air conditioner is judged together with the temperature of the outdoor coil, and then whether the current defrosting exit time is proper or not is determined.
Wherein, the fin is located at the heat exchange air duct, contact with the heat exchange air current for a long time, and have interference of external factors such as dust, etc., therefore its temperature sensing precision is influenced by the environment greatly, its detection result may have certain error, therefore it can not be used as the means of monitoring the outdoor heat exchanger temperature alone for a long time, but combine the outdoor coil temperature, can reflect the outdoor heat exchanger temperature to a certain extent, relatively speaking, the temperature sensing precision of the outdoor coil is influenced by the environment less, it is more accurate to be used as the means of detecting the outdoor heat exchanger temperature, therefore, it is more suitable for being used as the main temperature judgment parameter for a long time, therefore, each embodiment of the invention is mainly based on the outdoor coil temperature, determine whether the air conditioner satisfies the condition of quitting the defrosting (namely the first quitting condition) based on the outdoor coil temperature, when the outdoor coil temperature does not satisfy the condition of quitting the, the defrosting state of the air conditioner is judged by combining the temperature of the outdoor coil, and if the air conditioner actually finishes defrosting, the air conditioner is controlled to timely quit the defrosting mode, so that the phenomenon of frostless defrosting caused by improper defrosting quit threshold value of defrosting of the outdoor coil is avoided or the probability of frostless defrosting is reduced, the defrosting time is reduced, meanwhile, the refrigerating mode is adopted during defrosting, cold air is blown indoors, and therefore the defrosting time is reduced, and the comfort of a user can be improved.
Optionally, as shown in fig. 2, the determining whether the air conditioner satisfies a preset second exit condition based on the fin temperature and the outdoor coil temperature includes:
step S41, calculating the difference between the fin temperature and the outdoor coil temperature;
when defrosting is completed, the temperature of the fins is greater than the temperature of the outdoor coil, and therefore, the difference between the temperature of the fins and the temperature of the outdoor coil here refers to the difference obtained by subtracting the temperature of the outdoor coil from the temperature of the fins.
And step S42, when the difference is larger than or equal to a preset first temperature difference, judging that the air conditioner meets a preset second exit condition.
Because of the air conditioner defrosting, the defrosting on the fin can be caused to be removed firstly, and then the temperature of the fin can be caused to rise continuously, before the defrosting on the fin is removed, the temperature of the fin cannot be very high, the temperature difference between the fin and the temperature of the outdoor coil cannot be very large, and after the defrosting on the fin is removed, the temperature of the fin can be increased, and the temperature difference between the fin and the temperature of the outdoor coil can be increased slowly. Therefore, whether the defrosting of the air conditioner is actually finished or not can be judged according to the difference value between the temperature of the fins and the temperature of the outdoor coil.
And when the difference value between the temperature of the fins and the temperature of the outdoor coil is smaller than the preset first temperature difference, judging that the air conditioner does not meet the preset second quitting condition.
The preset first difference, optionally 3-5 deg.c.
Whether the air conditioner meets the second quitting condition or not is judged through the difference value of the fin temperature and the outdoor coil temperature, whether defrosting of the air conditioner is actually completed or not is identified, calculation is simple, implementation is simple, and accuracy is high.
Optionally, as shown in fig. 3, the first exit condition is that the outdoor coil temperature is greater than or equal to a preset defrosting exit temperature; step S50 is followed by:
step S60, acquiring the temperature of the outdoor coil when the air conditioner exits the defrosting mode;
and step S70, updating the preset defrosting exit temperature to the outdoor coil temperature when the air conditioner exits the defrosting mode.
If the temperature of the outdoor coil of the air conditioner does not meet the preset first exit condition but the air conditioner meets the preset second exit condition, it is indicated that the actual defrosting of the air conditioner is completed, but the temperature of the outdoor coil does not reach the preset defrosting exit temperature (i.e. the defrosting exit threshold value), and if the current preset defrosting exit temperature is continuously used for judging whether the temperature of the outdoor coil meets the first exit condition, the actual defrosting of the air conditioner is completed in every defrosting process, but the temperature of the outdoor coil does not reach the preset defrosting exit temperature, which is not beneficial to the accurate control of the air conditioner.
In order to avoid the problem that actual defrosting of the air conditioner is finished again or is reduced, but the temperature of the outdoor coil does not reach the preset defrosting exit temperature, the temperature of the outdoor coil when the air conditioner exits the defrosting mode is obtained and is used as the latest preset defrosting exit temperature, so that the air conditioner can accurately preset the defrosting exit temperature to control defrosting exit when defrosting next time.
The preset defrosting exit temperature can be selected to be 7-9 ℃.
Through real-time detection, when the actual defrosting of the air conditioner is finished but the temperature of the outdoor coil does not reach the preset defrosting exit temperature, the air conditioner automatically records the temperature of the outdoor coil at the end of the actual defrosting, namely the temperature of the outer coil when the air conditioner exits the defrosting when the air conditioner meets the preset second exit condition, and the temperature of the outdoor coil is taken as the latest preset defrosting exit temperature, so that the preset defrosting exit temperature is judged and updated in real time according to the state of the air conditioner in the actual operation, the air conditioner can adjust the defrosting exit threshold value of the outdoor coil which is most suitable for the current internal and external environments according to the judgment of the invention, and the occurrence of frost-free defrosting is avoided or reduced fundamentally.
Optionally, the first exit condition is that the outdoor coil temperature is greater than or equal to a preset defrosting exit temperature; step S40 includes: when the outdoor coil temperature is greater than the preset temperature, and the difference value between the fin temperature and the outdoor coil temperature is greater than or equal to the preset second temperature difference, the air conditioner is judged to meet the preset second exit condition, wherein the preset temperature is less than the preset defrosting exit temperature.
The preset temperature may be set as part of the second exit condition based on the reason that the outdoor coil temperature is unlikely to be too low when the actual defrosting of the air conditioner is complete. When the outdoor coil temperature is higher than the preset temperature and lower than the preset defrosting exit temperature, and the difference value between the fin temperature and the outdoor coil temperature is higher than or equal to the preset second temperature difference, the outdoor coil temperature of the air conditioner is not low, and the difference value between the fin temperature and the outdoor coil temperature is too large, at the moment, the actual defrosting of the air conditioner is finished, and the air conditioner can be judged to meet the preset second exit condition.
Through being greater than the outdoor coil temperature and predetermineeing the temperature, with the difference value of fin temperature with outdoor coil temperature is greater than or equal to predetermined second difference in temperature combination and is regarded as predetermined second and withdraw from the condition, improves the accuracy that changes the frost and withdraw from the condition, avoids appearing actually not changing the frost and accomplishes, nevertheless judges that the air conditioner changes the frost and accomplishes, appears frequently changing the problem of frost.
Alternatively, another complete implementation example is given for ease of understanding.
Referring to fig. 4, after the air conditioner normally operates in a heating mode, it is determined whether the outdoor coil temperature is greater than or equal to a preset defrosting exit temperature, where the outdoor coil temperature is TAPresetting the defrosting exit temperatureIs TR；
If the temperature of the outdoor coil is greater than or equal to the preset defrosting exit temperature, the air conditioner meets the defrosting exit condition, and the air conditioner is controlled to exit the defrosting mode and enter normal heating operation;
if the temperature of the outdoor coil is less than the preset defrosting exit temperature, the temperature of the fins of the outdoor heat exchanger is obtained, the temperature difference obtained by subtracting the temperature of the outdoor coil from the temperature of the fins is calculated, whether the temperature difference is greater than or equal to the preset value is judged, wherein the temperature of the fins is TBPreset value of TM；
If the temperature difference is larger than or equal to a preset value, the actual defrosting of the air conditioner is finished, and the air conditioner is controlled to exit a defrosting mode and enter normal heating operation;
if the temperature difference is smaller than the preset value, the defrosting of the air conditioner is not finished, the air conditioner is controlled to continue defrosting, whether the temperature of the outdoor coil is larger than or equal to the preset defrosting exit temperature is judged again, and the steps are executed repeatedly.
The invention also provides a defrosting control device of the air conditioner. Fig. 5 is a schematic diagram of an embodiment of the control device. As shown in fig. 5, the control device includes:
an obtaining unit 101, configured to obtain an outdoor coil temperature when the air conditioner is in a defrosting mode;
a judging unit 102, configured to judge whether the outdoor coil temperature meets a preset first exit condition;
the obtaining unit 101 is further configured to obtain a fin temperature of the outdoor heat exchanger if the outdoor coil temperature does not meet a preset first exit condition;
the judging unit 102 is further configured to judge whether the air conditioner meets a preset second exiting condition based on the fin temperature and the outdoor coil temperature;
a control unit 103, configured to control the air conditioner to exit the defrosting mode if the air conditioner satisfies a preset second exit condition.
Optionally, the determining unit 102 is further configured to calculate a difference between the fin temperature and the outdoor coil temperature; and when the difference value is greater than or equal to a preset first temperature difference, judging that the air conditioner meets a preset second exit condition.
Optionally, the first temperature difference is 3-5 ℃.
Optionally, the determining unit 102 is further configured to perform, after the determining whether the air conditioner satisfies a preset second exit condition based on the fin temperature and the outdoor coil temperature: and when the air conditioner does not meet the preset second quitting condition, returning to the step of judging whether the temperature of the outdoor coil meets the preset first quitting condition or not.
Optionally, the control device further comprises: an update unit 104 for performing, after the controlling the air conditioner to exit the defrosting mode: acquiring the temperature of an outdoor coil pipe when the air conditioner exits a defrosting mode; and updating the preset defrosting exit temperature to the outdoor coil temperature when the air conditioner exits the defrosting mode.
Optionally, the determining unit 102 is further configured to determine that the air conditioner meets a second preset exit condition when the outdoor coil temperature is greater than a preset temperature, and a difference between the fin temperature and the outdoor coil temperature is greater than or equal to a second preset temperature difference, where the preset temperature is less than the preset defrosting exit temperature.
Optionally, the determining unit 102 is further configured to control the air conditioner to exit the defrosting mode if the temperature of the outdoor coil meets a preset first exit condition.
The invention also provides an air conditioner. Fig. 6 is a schematic diagram of an embodiment of the air conditioner, and as shown in fig. 6, the air conditioner includes a computer-readable storage medium 201 storing a computer program and a processor 202, and the computer program is read by the processor 202 and executed to implement the air conditioner defrosting control method according to the above embodiments.
Optionally, the outdoor heat exchanger of the air conditioner includes a fin, one or more temperature sensors may be disposed on the fin, and if a plurality of temperature sensors are disposed on the fin, an average value of the plurality of temperature sensors may be calculated, and the average value is used as the fin temperature for calculation/determination in each embodiment of the present invention.
Fig. 7 is a schematic view of another alternative embodiment of the air conditioner. As shown in fig. 7, the air conditioner includes a fin temperature sensor, a main chip for analyzing temperature, an outdoor coil temperature sensor, and a main board chip of the air conditioner. The fin temperature sensor is used for detecting the temperature of the fins, is arranged on the side of the fins of the air conditioner and can be one or more; the outdoor coil temperature sensor is used for detecting the temperature of the outdoor coil and is arranged on the outdoor coil; the fin temperature sensor/the outdoor coil temperature sensor transmits the detected fin temperature/the detected outdoor coil temperature to the analysis temperature main chip, and the analysis temperature main chip performs data analysis processing on the detected fin temperature/the detected outdoor coil temperature and then transmits the processed data to the air conditioner mainboard chip, wherein the data analysis processing operation performed by the analysis temperature main chip can include operation for improving the accuracy of temperature data, for example, calculating the average value of all temperature sampling values within a period of time or calculating the average value of a plurality of continuous temperature sampling values, and using the average value as a temperature parameter for defrosting judgment, or calculating the average value of a plurality of temperature sensors as a temperature parameter for defrosting judgment when the number of fin temperature sensors is multiple. And after receiving the processed fin temperature/outdoor coil temperature, the air conditioner mainboard chip is used as the fin temperature/outdoor coil temperature for defrosting exit judgment in the air conditioner defrosting control method.
The present invention also provides a computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the air conditioner defrosting control method according to the above embodiments is implemented.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A defrosting control method of an air conditioner is characterized by comprising the following steps:
when the air conditioner is in a defrosting mode, acquiring the temperature of an outdoor coil;
judging whether the temperature of the outdoor coil pipe meets a preset first exit condition or not;
if not, acquiring the temperature of the fins of the outdoor heat exchanger;
judging whether the air conditioner meets a preset second exit condition or not based on the fin temperature and the outdoor coil temperature;
and if so, controlling the air conditioner to exit the defrosting mode.
2. The air conditioner defrosting control method of claim 1, wherein the determining whether the air conditioner satisfies a preset second exit condition based on the fin temperature and the outdoor coil temperature comprises:
calculating a difference between the fin temperature and the outdoor coil temperature;
and when the difference value is greater than or equal to a preset first temperature difference, judging that the air conditioner meets a preset second exit condition.
3. The air conditioner defrosting control method of claim 2 wherein the first temperature difference is 3-5 ℃.
4. The air conditioner defrosting control method of claim 2, wherein the determining whether the air conditioner satisfies a preset second exit condition based on the fin temperature and the outdoor coil temperature comprises:
and when the air conditioner does not meet the preset second quitting condition, returning to the step of judging whether the temperature of the outdoor coil meets the preset first quitting condition or not.
5. The air conditioner defrosting control method of any one of claims 1 to 4, wherein the first exit condition is that the outdoor coil temperature is greater than or equal to a preset defrosting exit temperature; after the controlling the air conditioner to exit the defrosting mode, the method further comprises the following steps:
acquiring the temperature of an outdoor coil pipe when the air conditioner exits a defrosting mode;
and updating the preset defrosting exit temperature to the outdoor coil temperature when the air conditioner exits the defrosting mode.
6. The air conditioner defrosting control method of claim 1 wherein the first exit condition is the outdoor coil temperature being greater than or equal to a preset defrosting exit temperature; the judging whether the air conditioner meets a preset second exit condition or not based on the fin temperature and the outdoor coil temperature comprises:
when the outdoor coil temperature is greater than the preset temperature, and the difference value between the fin temperature and the outdoor coil temperature is greater than or equal to the preset second temperature difference, the air conditioner is judged to meet the preset second exit condition, wherein the preset temperature is less than the preset defrosting exit temperature.
7. The air conditioner defrosting control method according to any one of claims 1 to 4, wherein the determining whether the outdoor coil temperature satisfies a preset first exit condition comprises:
and if the temperature of the outdoor coil pipe meets a preset first exit condition, controlling the air conditioner to exit the defrosting mode.
8. An air conditioner defrosting control device, comprising:
an acquisition unit (101) for acquiring an outdoor coil temperature when the air conditioner is in a defrosting mode;
the judging unit (102) is used for judging whether the outdoor coil temperature meets a preset first exit condition or not;
the obtaining unit (101) is further configured to obtain a fin temperature of the outdoor heat exchanger if the outdoor coil temperature does not meet a preset first exit condition;
the judging unit (102) is further used for judging whether the air conditioner meets a preset second exit condition or not based on the fin temperature and the outdoor coil temperature;
a control unit (103) for controlling the air conditioner to exit the defrosting mode if the air conditioner satisfies a preset second exit condition.
9. An air conditioner, characterized by comprising a computer-readable storage medium (201) storing a computer program and a processor (202), the computer program being read and executed by the processor (202) to implement the air conditioner defrosting control method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when read and executed by a processor, implements the air conditioner defrosting control method according to any one of claims 1 to 7.
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