CN111336648A - 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

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Publication number
CN111336648A
CN111336648A CN202010182185.8A CN202010182185A CN111336648A CN 111336648 A CN111336648 A CN 111336648A CN 202010182185 A CN202010182185 A CN 202010182185A CN 111336648 A CN111336648 A CN 111336648A
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China
Prior art keywords
air conditioner
value
current
defrosting
frosting
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CN202010182185.8A
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Chinese (zh)
Inventor
魏华锋
唐辉辉
秦宪
吴君
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Application filed by Aux Air Conditioning Co Ltd, Ningbo Aux Electric Co Ltd filed Critical Aux Air Conditioning Co Ltd
Priority to CN202010182185.8A priority Critical patent/CN111336648A/en
Publication of CN111336648A publication Critical patent/CN111336648A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41Defrosting; Preventing freezing
    • F24F11/42Defrosting; Preventing freezing of outdoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • F24F2110/12Temperature of the outside air

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: acquiring outdoor environment temperature in a heating mode; determining a frosting threshold according to the outdoor environment temperature; acquiring an initial value and an actual measurement value of the current of the external motor; judging whether the air conditioner meets defrosting conditions or not according to the initial value, the measured value and the frosting threshold value of the current of the external motor; and if the defrosting condition is met, controlling the air conditioner to execute defrosting operation. Therefore, the frosting threshold value is determined through the outdoor environment temperature, so that the influence of different outdoor environment temperatures on the precision of the frosting threshold value can be greatly reduced or eliminated, and the accuracy and precision of defrosting control are greatly improved.

Description

Air conditioner defrosting control method and device, storage medium and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner defrosting control method and device, a storage medium and an air conditioner.
Background
When the air conditioner is used in winter and is used for heating, because the outdoor temperature is low, the frosting phenomenon is easy to generate, and therefore the periodic defrosting is needed in the heating process. In the prior art, the defrosting period is controlled in a temperature-time mode, but the control is not accurate, so that the use comfort is influenced.
In the prior art, the defrosting period is partially controlled by adopting the current of the external motor and the current threshold, but the defrosting control method only considers the change of the current of the external motor, does not consider the influence of the difference of the outdoor environment temperature on the defrosting control, and reduces the control accuracy.
Disclosure of Invention
The problem solved by the invention is that the difference of the external environment temperature reduces the defrosting control precision.
In order to solve the above problems, the present invention first provides an air conditioner defrosting control method, which includes:
acquiring outdoor environment temperature in a heating mode;
determining a frosting threshold according to the outdoor environment temperature;
acquiring an initial value and an actual measurement value of the current of the external motor;
judging whether the air conditioner meets defrosting conditions or not according to the initial value, the measured value and the frosting threshold value of the current of the external motor;
and if the defrosting condition is met, controlling the air conditioner to execute defrosting operation.
Therefore, the frosting threshold value is determined through the outdoor environment temperature, so that the influence of different outdoor environment temperatures on the precision of the frosting threshold value can be greatly reduced or eliminated, and the accuracy and precision of defrosting control are greatly improved.
Optionally, the determining a frosting threshold according to the outdoor environment temperature includes:
if the outdoor environment temperature is greater than or equal to a first temperature, setting the frosting threshold value as a first threshold value;
and if the outdoor environment temperature is less than the first temperature and greater than a second temperature, setting the frosting threshold value as a second threshold value.
Therefore, the grade is carried out according to the outdoor environment temperature, different frosting threshold values correspond to different grades, different frosting threshold values are determined according to the difference of the outdoor environment temperature, and accurate control is achieved.
Optionally, the determining a frosting threshold according to the outdoor environment temperature further includes:
and if the outdoor environment temperature is less than or equal to the second temperature, setting the frosting threshold value as a third threshold value.
Therefore, on one hand, the control accuracy is improved by the corresponding relation between the outdoor environment temperature and the frosting threshold value; on the other hand, the frosting threshold value is only divided into three grades, so that the corresponding frosting threshold value can be quickly determined after the outdoor environment temperature is obtained, and the effect of quickly determining the frosting threshold value is achieved.
Optionally, the obtaining an initial value and an actual value of the current of the external motor includes:
after the starting or defrosting cycle begins for a first time, acquiring current values of the external motor at least twice;
and taking the average value of the acquired current values of the outer motor as the initial value.
By taking the average value as an initial value, the adverse effect of defrosting control error caused by single current value acquisition error can be eliminated, and the defrosting control accuracy is improved.
Optionally, the current value of the external motor is obtained at least twice after the start-up or defrosting cycle begins for the first time period, where the current value is obtained periodically.
Therefore, by means of periodic acquisition, on one hand, the acquisition time points of the current values are relatively average by means of the periodic acquisition, and the balance of the acquired current values is improved; on the other hand, current value detection risks caused by single acquisition errors can be avoided by multiple acquisition.
Optionally, the obtaining an initial value and an actual measurement value of the current of the external motor further includes:
periodically acquiring the current value of the current time of the external motor, and taking the current value of the current time as the measured value of the current time.
In this way, by periodically acquiring the measured values, the uniformity of the distribution of the acquired current values can be increased, and the data amount of the acquired measured values can be increased by periodically acquiring the measured values, thereby further improving the accuracy of the data by the data amount.
Optionally, the determining whether the air conditioner meets the defrosting condition according to the initial value, the measured value, and the frosting threshold of the current of the external motor includes:
determining the current change slope of the outer motor according to the initial value and the measured value of the current of the outer motor;
and judging whether the current change slope meets the defrosting condition or not.
Optionally, when the following conditions are met, determining that the current change slope meets the defrosting condition: and the current change slope is greater than the frosting threshold value for N continuous periods, wherein N is a natural number.
Therefore, the requirement of the threshold value is continuously met for multiple times according to the periodic operation rule and state, and misjudgment and frequent reaction of the system caused by single-point extreme change are avoided.
Optionally, when the frosting threshold is the first threshold or the second threshold, the value range of N is 5 to 15.
Optionally, when the frosting threshold is the third threshold, the value range of N is 3 to 10.
Therefore, according to the sectional treatment of the outside environment, the self-adaptive adjustment capacity is improved, the scenes such as heat exchange dust accumulation, blocking and the like are avoided, the misjudgment is generated, and the comfort of the product is ensured.
Secondly, provide an air conditioner defrosting controlling means, it includes:
an acquisition unit for acquiring an outdoor ambient temperature in a heating mode;
a determination unit for determining a frosting threshold according to the outdoor ambient temperature;
the acquisition unit is also used for acquiring an initial value and an actual measurement value of the current of the external motor;
a determination unit configured to determine whether the air conditioner satisfies a defrosting condition according to an initial value, an actual measurement value, and the frosting threshold value of the external motor current;
a control unit for controlling the air conditioner to perform a defrosting operation if a defrosting condition is satisfied.
Therefore, the frosting threshold value is determined through the outdoor environment temperature, so that the influence of different outdoor environment temperatures on the precision of the frosting threshold value can be greatly reduced or eliminated, and the accuracy and precision of defrosting control are greatly improved.
There is again provided an air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the air conditioner defrost control method as described above.
Therefore, the frosting threshold value is determined through the outdoor environment temperature, so that the influence of different outdoor environment temperatures on the precision of the frosting threshold value can be greatly reduced or eliminated, and the accuracy and precision of defrosting control are greatly improved.
Finally, a computer-readable storage medium is provided, in which a computer program is stored, and when the computer program is read and executed by a processor, the air conditioner defrosting control method is implemented. Therefore, the frosting threshold value is determined through the outdoor environment temperature, so that the influence of different outdoor environment temperatures on the precision of the frosting threshold value can be greatly reduced or eliminated, and the accuracy and precision of defrosting control are greatly improved.
Drawings
Fig. 1 is a flowchart of an air conditioner defrost control method according to an embodiment of the present invention;
FIG. 2 is a flowchart of the air conditioner defrost control method steps 200 according to one embodiment of the present invention;
FIG. 3 is a flowchart of air conditioner defrost control method steps 200 according to another embodiment of the present invention;
FIG. 4 is a flowchart of the air conditioner defrost control method steps 300 according to one embodiment of the present invention;
FIG. 5 is a flowchart of air conditioner defrost control method steps 300 according to another embodiment of the present invention;
FIG. 6 is a flowchart of air conditioner defrost control method steps 400 according to an embodiment of the present invention;
fig. 7 is a block diagram illustrating a defrosting control apparatus for an air conditioner according to an embodiment of the present invention.
Description of reference numerals:
1-an obtaining unit, 2-a determining unit, 3-a judging unit and 4-a control unit.
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.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. 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.
For easy understanding, in the present invention, technical problems therein need to be elaborated.
When the air conditioner is used in winter and used for heating, because the outdoor temperature is low, condensed water generated after heat exchange between air on the outdoor side and the low temperature is carried out is remained on the fins, the wind resistance is increased by the condensed water on the fins, so that the heat exchange is worsened, the evaporation temperature is further reduced, and when the evaporation temperature is lower than 0 ℃, the condensed water is gradually frosted, so that periodic defrosting is needed in the heating process, and the comfort in the heating process is poor. In the prior art, the defrosting period is controlled in a temperature-time mode, but the temperature, the time parameter and the frosting degree are not in direct correspondence, so that the thickness of a frost layer cannot be controlled, the defrosting is not accurate, and the use comfort is affected.
In the prior art, the current of an external motor and a current threshold are partially adopted to control a defrosting period, wherein the change condition of the current of the motor can reflect the frosting condition; after the heat exchanger frosts and air inlet is blocked, the load of the motor is increased, the current of the motor is increased, the frosting condition of the outdoor heat exchanger is identified according to the change of the current, and then whether defrosting is carried out or not is judged.
When power is supplied for a certain time, the motor maintains a constant rotating speed and balances the external load at the rotating speed all the time, but once the load changes, the external load can be balanced only by increasing the current in order to keep the original rotating speed, so that the frosting condition at the outdoor side is fed back through the change condition of the current, defrosting is carried out properly, and the comfort is improved.
This defrost control method only takes into account the change in the external motor current. In fact, for the current of the external motor, the load and the air inlet condition are reflected, but the current of the external motor of the same air conditioner is different under different outdoor environment temperatures; this difference in outdoor ambient temperature can have a significant impact on defrost control, reducing the accuracy of control.
The embodiment of the disclosure provides an air conditioner defrosting control method, which can be executed by an air conditioner defrosting control device, and the air conditioner defrosting control device can be integrated in an air conditioner, an air conditioner and other electronic equipment. Fig. 1 is a flowchart illustrating a defrosting control method for an air conditioner according to an embodiment of the present invention; the air conditioner defrosting control method comprises the following steps:
step 100, acquiring outdoor environment temperature in a heating mode;
the outdoor unit of the air conditioner generates the frosting phenomenon only in the heating mode, so that the outdoor environment temperature is obtained only in the heating mode.
The outdoor ambient temperature may be obtained by a temperature sensor disposed on the outdoor unit, or may be obtained by other methods, such as a temperature measuring device at another location in the area, a network, and the like.
Step 200, determining a frosting threshold according to the outdoor environment temperature;
different outdoor environment temperatures correspond to different frosting thresholds, so that the frosting threshold is determined according to the outdoor environment temperature.
Optionally, the corresponding relationship between the outdoor ambient temperature and the frosting threshold is preset in the air conditioner, and can be read when the frosting threshold is determined. Therefore, the frosting threshold value can be directly determined according to the corresponding relation and the outdoor environment temperature.
Optionally, the corresponding relationship between the outdoor environment temperature and the frosting threshold is a table or a calculation formula.
Step 300, obtaining an initial value and an actual measurement value of the current of the external motor;
the initial value of the current of the external motor is the current value of the external motor at the initial time (starting time or starting time of a defrosting cycle) of the air conditioner; the measured value of the current of the external motor is the current value of the external motor at the current moment.
Step 400, judging whether the air conditioner meets defrosting conditions or not according to the initial value, the measured value and the frosting threshold value of the current of the external motor;
the defrosting condition is judged by the initial value and the measured value, and the initial value is introduced into the defrosting control, so that the judgment accuracy can be improved (relative to a preset current threshold value and the like).
And 500, controlling the air conditioner to execute defrosting operation if the defrosting condition is met.
In the defrosting operation of the air conditioner, various modes have been recorded in the prior art, and are not described herein again.
Therefore, the frosting threshold value is determined through the outdoor environment temperature, so that the influence of different outdoor environment temperatures on the precision of the frosting threshold value can be greatly reduced or eliminated, and the accuracy and precision of defrosting control are greatly improved.
Optionally, as shown in fig. 2, the step 200 of determining a frosting threshold according to the outdoor environment temperature includes:
step 210, if the outdoor environment temperature is greater than or equal to a first temperature, setting the frosting threshold value as a first threshold value;
step 220, if the outdoor environment temperature is less than the first temperature and greater than a second temperature, the frosting threshold is set as a second threshold.
Therefore, the grade is carried out according to the outdoor environment temperature, different frosting threshold values correspond to different grades, different frosting threshold values are determined according to the difference of the outdoor environment temperature, and accurate control is achieved.
Optionally, as shown in fig. 3, the step 200 of determining a frosting threshold according to the outdoor environment temperature further includes:
step 230, if the outdoor ambient temperature is less than or equal to the second temperature, setting the frosting threshold value as a third threshold value.
Thus, the outdoor environment temperature is divided into three grades, different grades correspond to different frosting threshold values, and the outdoor environment temperature corresponds to the frosting threshold values through the three grades. Therefore, on one hand, the control accuracy is improved by the corresponding relation between the outdoor environment temperature and the frosting threshold value; on the other hand, the frosting threshold value is only divided into three grades, so that the corresponding frosting threshold value can be quickly determined after the outdoor environment temperature is obtained, and the effect of quickly determining the frosting threshold value is achieved.
The corresponding relation between the outdoor environment temperature and the frosting threshold value can be preset in the air conditioner, so that the frosting threshold value can be determined quickly by inquiring the corresponding relation after the outdoor environment temperature is determined, and the determination speed of the frosting threshold value is increased.
The first temperature is higher than the second temperature, and the outdoor environment temperature is divided into three levels through the first temperature and the second temperature, so that the corresponding frosting threshold value can be rapidly determined according to the outdoor environment temperature.
Optionally, the first temperature is 5 ℃ to 9 ℃.
Optionally, the second temperature is in a range of-10 ℃ to-6 ℃. Therefore, by setting the first temperature and the second temperature, the extreme condition (the outdoor environment temperature is less than the second temperature or more than the first temperature under the heating mode, the former is easy to frost, and the latter is not easy to frost) can be separated from the normal condition, so that different operation parameters can be conveniently adopted, and the accuracy of threshold judgment is improved.
Optionally, the first temperature is 7 ℃. And determining the frosting threshold value to be the first threshold value or the second threshold value through the first temperature, so that the accuracy of threshold value judgment is further improved.
Optionally, the second temperature is-8 ℃. And determining the frosting threshold value as a second threshold value or a third threshold value through the second temperature, so that the accuracy of threshold value judgment is further improved.
The value range of the first threshold is 5% -50%. Whether the air conditioner meets the frosting condition can be judged by taking the first threshold as the frosting threshold, so that the accuracy of judging the frosting condition is improved.
The value range of the second threshold is 4% -40%. Whether the air conditioner meets the frosting condition can be judged by taking the second threshold value as the frosting threshold value, so that the accuracy of judging the frosting condition is improved.
The value range of the third threshold is 3% -30%. Whether the air conditioner meets the frosting condition can be judged by taking the third threshold as the frosting threshold, so that the accuracy of judging the frosting condition is improved.
Optionally, as shown in fig. 4, the step 300 of acquiring an initial value and an actual value of the external motor current includes:
step 310, acquiring current values of the external motor at least twice after starting up or starting a first time period of a defrosting cycle;
wherein the starting-up is that the air conditioner is switched from a stop state or a standby state to an opening state; in the control process of the air conditioner, parameters are detected, and a defrosting period is formed from defrosting starting to defrosting ending.
After the defrosting cycle is started and the air conditioner is started, the air conditioner is in an unstable running state, so that the air conditioner needs to run for a first time period, and the stable running state is recovered; and then, detecting and acquiring the current value, so that the error of current value measurement caused by unstable operation can be avoided, and the defrosting control accuracy is further improved.
Optionally, in step 310, after the start-up or defrosting cycle begins for the first time period, the current value of the external motor is obtained at least twice, where the current value is obtained periodically. Therefore, by means of periodic acquisition, on one hand, the acquisition time points of the current values are relatively average by means of the periodic acquisition, and the balance of the acquired current values is improved; on the other hand, current value detection risks caused by single acquisition errors can be avoided by multiple acquisition.
Therefore, after the defrosting cycle is started every time, the initial value is obtained again, the universality and the accuracy of defrosting control can be improved, and the phenomena of misjudgment or misjudgment and the like caused by the difference of the installation state, the installation area and the running state are avoided.
Optionally, the first time period is 3 min. Therefore, after the air conditioner is started or a defrosting cycle begins each time, the air conditioner can stably run and then acquire and acquire data, and the defrosting control accuracy is improved.
Optionally, the obtaining period of the current value is 30s, so that the obtaining of the current value can be completed quickly, and the timely and effective defrosting control is improved.
Optionally, after the starting or defrosting cycle begins for a first time period, obtaining the current value of the external motor for three times; thus, after three groups of current values are obtained, the average value of the three groups of current values is used as an initial value; the three groups of current values can greatly reduce the adverse effect caused by one group of current values even if the current value is the error current (if only two groups of current values are used, the adverse effect cannot be greatly reduced), and only three groups of current values are collected, so that the overlong acquisition time of the initial value caused by the excessive number of the current value collection groups is avoided.
And 320, taking the average value of the acquired current values of the outer motor as the initial value.
By taking the average value as an initial value, the adverse effect of defrosting control error caused by single current value acquisition error can be eliminated, and the defrosting control accuracy is improved.
Optionally, as shown in fig. 5, the step 300 of acquiring an initial value and an actual value of the external motor current further includes:
step 330, periodically obtaining a current value of the current time of the external motor, and using the current value of the current time as the measured value of the current time.
And after the current value of the external motor at the current time is obtained, taking the current value at the current time as the actual measurement value at the current time.
In this way, by periodically acquiring the measured values, the uniformity of the distribution of the acquired current values can be increased, and the data amount of the acquired measured values can be increased by periodically acquiring the measured values, thereby further improving the accuracy of the data by the data amount.
Optionally, as shown in fig. 6, the step 400 of determining whether the air conditioner satisfies a defrosting condition according to the initial value, the measured value, and the frosting threshold of the external motor current includes:
step 410, determining a current change slope of the outer motor according to the initial value and the measured value of the current of the outer motor;
the calculation formula of the current change slope is as follows: (X) Y-X/X
Wherein f (X) is the current change slope, Y is the measured value of the external motor current, and X is the initial value of the external motor current.
Therefore, the current attenuation slope method is adopted to judge the outdoor frosting condition, and inaccurate judgment caused by fixed threshold is avoided, so that the adaptability and the rationality of the algorithm are improved. And (4) calculating the slope of the current increment according to the current increment, and feeding back the ash deposition condition according to the slope of the state, so that the method is accurate and effective.
Step 420, determining whether the current change slope meets a defrosting condition.
Optionally, when the following conditions are met, determining that the current change slope meets the defrosting condition: and the current change slope is greater than the frosting threshold value for N continuous periods, wherein N is a natural number.
Therefore, the requirement of the threshold value is continuously met for multiple times according to the periodic operation rule and state, and misjudgment and frequent reaction of the system caused by single-point extreme change are avoided.
Optionally, when the frosting threshold is the first threshold or the second threshold, the value range of N is 5 to 15.
Optionally, when the frosting threshold is the third threshold, the value range of N is 3 to 10.
Therefore, according to the sectional treatment of the outside environment, the self-adaptive adjustment capacity is improved, the scenes such as heat exchange dust accumulation, blocking and the like are avoided, the misjudgment is generated, and the comfort of the product is ensured.
Optionally, in the step 500, after the air conditioner is controlled to perform the defrosting operation if the defrosting condition is satisfied, whether defrosting is completed may be determined by obtaining an actually measured value of the current of the outer motor and a current change slope of the outer motor, and defrosting may also be completed by other methods, such as setting a fixed defrosting time.
It should be noted that, after determining that the defrosting is completed, step 100 is executed again, and in the heating mode, the outdoor environment temperature is acquired, so that the next defrosting cycle is entered.
Therefore, the method can realize the initial self-checking and self-adaptive capacity (every defrosting period is carried out) by the periodical data acquisition, thereby improving the defrosting control accuracy and being suitable for different regions and different environments.
Thus, the data acquisition and processing of the multi-cycle loop; the periodic data acquisition effectively avoids misjudgment, truly reflects the outdoor side heat exchange frosting condition of the air conditioner, continuously and repeatedly meets the threshold requirement according to the periodic operation rule and state, and avoids misjudgment and frequent reaction of the system caused by single-point extreme change; meanwhile, the method realizes the initial self-checking and self-adaptive capacity by periodically acquiring data, and is suitable for different regions and different environments.
The embodiment of the present disclosure provides an air conditioner defrosting control device, which is used for executing the air conditioner defrosting control method described in the above, and the air conditioner defrosting control device is described in detail below.
As shown in fig. 7, the air conditioner defrosting control apparatus includes:
an acquisition unit 1 for acquiring an outdoor ambient temperature in a heating mode;
a determination unit 2 for determining a frosting threshold according to the outdoor ambient temperature;
the acquisition unit 1 is further configured to acquire an initial value and an actual measurement value of the current of the external motor;
a determination unit 3, configured to determine whether the air conditioner satisfies a defrosting condition according to the initial value, the actual measurement value, and the frosting threshold of the external motor current;
a control unit 4 for controlling the air conditioner to perform a defrosting operation if a defrosting condition is satisfied.
Therefore, the frosting threshold value is determined through the outdoor environment temperature, so that the influence of different outdoor environment temperatures on the precision of the frosting threshold value can be greatly reduced or eliminated, and the accuracy and precision of defrosting control are greatly improved.
Optionally, the determining unit 2 is further configured to: if the outdoor environment temperature is greater than or equal to a first temperature, setting the frosting threshold value as a first threshold value; and if the outdoor environment temperature is less than the first temperature and greater than a second temperature, setting the frosting threshold value as a second threshold value.
Optionally, the determining unit 2 is further configured to: and if the outdoor environment temperature is less than or equal to the second temperature, setting the frosting threshold value as a third threshold value.
Optionally, the first temperature is 7 ℃.
Optionally, the second temperature is-8 ℃.
Optionally, a value range of the first threshold is 5% to 50%.
Optionally, a value range of the second threshold is 4% to 40%.
Optionally, a value range of the third threshold is 3% to 30%.
Optionally, the obtaining unit 1 is further configured to: after the starting or defrosting cycle begins for a first time, acquiring current values of the external motor at least twice; and taking the average value of the acquired current values of the outer motor as the initial value.
Optionally, the current value of the external motor is obtained at least twice after the start-up or defrosting cycle begins for the first time period, where the current value is obtained periodically.
Optionally, the obtaining unit 1 is further configured to: periodically acquiring the current value of the current time of the external motor, and taking the current value of the current time as the measured value of the current time.
Optionally, the judging unit 3 is further configured to: determining the current change slope of the outer motor according to the initial value and the measured value of the current of the outer motor; and judging whether the current change slope meets the defrosting condition or not.
Optionally, when the following conditions are met, determining that the current change slope meets the defrosting condition: and the current change slope is greater than the frosting threshold value for N continuous periods, wherein N is a natural number.
Optionally, when the frosting threshold is the first threshold or the second threshold, the value range of N is 5 to 15.
Optionally, when the frosting threshold is the third threshold, the value range of N is 3 to 10.
The embodiment of the present disclosure provides an air conditioner, which includes a computer readable storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement the air conditioner defrosting control method as described above.
Therefore, the frosting threshold value is determined through the outdoor environment temperature, so that the influence of different outdoor environment temperatures on the precision of the frosting threshold value can be greatly reduced or eliminated, and the accuracy and precision of defrosting control are greatly improved.
The embodiment of the present disclosure also provides a computer-readable storage medium, which stores instructions that, when being loaded and executed by a processor, can implement the air conditioner defrosting control method.
The technical solution of the embodiment of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution 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 an air conditioner, a refrigeration device, a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the embodiment of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Therefore, the frosting threshold value is determined through the outdoor environment temperature, so that the influence of different outdoor environment temperatures on the precision of the frosting threshold value can be greatly reduced or eliminated, and the accuracy and precision of defrosting control are greatly improved.
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 (13)

1. An air conditioner defrosting control method is characterized by comprising the following steps:
acquiring outdoor environment temperature in a heating mode;
determining a frosting threshold according to the outdoor environment temperature;
acquiring an initial value and an actual measurement value of the current of the external motor;
judging whether the air conditioner meets defrosting conditions or not according to the initial value, the measured value and the frosting threshold value of the current of the external motor;
and if the defrosting condition is met, controlling the air conditioner to execute defrosting operation.
2. The air conditioner defrost control method of claim 1, wherein said determining a frosting threshold based on said outdoor ambient temperature comprises:
if the outdoor environment temperature is greater than or equal to a first temperature, setting the frosting threshold value as a first threshold value;
and if the outdoor environment temperature is less than the first temperature and greater than a second temperature, setting the frosting threshold value as a second threshold value.
3. The air conditioner defrost control method of claim 2, wherein said determining a frosting threshold based on said outdoor ambient temperature further comprises:
and if the outdoor environment temperature is less than or equal to the second temperature, setting the frosting threshold value as a third threshold value.
4. The air conditioner defrosting control method of any one of claims 1 to 3, wherein the obtaining of the initial value and the measured value of the current of the external motor comprises:
after the starting or defrosting cycle begins for a first time, acquiring current values of the external motor at least twice;
and taking the average value of the acquired current values of the outer motor as the initial value.
5. The air conditioner defrosting control method of claim 4, wherein the current value is obtained periodically among the current values of the external motor obtained at least twice after the first time period from the start-up or the start of the defrosting cycle.
6. The air conditioner defrost control method of claim 4, wherein said obtaining an initial value and an actual value of the external motor current further comprises:
periodically acquiring the current value of the current time of the external motor, and taking the current value of the current time as the measured value of the current time.
7. The air conditioner defrosting control method according to claim 2 or 3, wherein the determining whether the air conditioner satisfies a defrosting condition according to the initial value, the measured value and the frosting threshold of the external motor current includes:
determining the current change slope of the outer motor according to the initial value and the measured value of the current of the outer motor;
and judging whether the current change slope meets the defrosting condition or not.
8. The air conditioner defrost control method of claim 7, wherein the current change slope is determined to satisfy the defrost condition when: and the current change slope is greater than the frosting threshold value for N continuous periods, wherein N is a natural number.
9. The air conditioner defrosting control method of claim 8, wherein when the frosting threshold is the first threshold or the second threshold, the value of N ranges from 5 to 15.
10. The air conditioner defrosting control method of claim 8, wherein the value of N ranges from 3 to 10 when the frosting threshold is the third threshold.
11. An air conditioner defrosting control device, comprising:
an acquisition unit (1) for acquiring an outdoor ambient temperature in a heating mode;
a determination unit (2) for determining a frosting threshold from the outdoor ambient temperature;
the acquisition unit (1) is also used for acquiring an initial value and an actual measurement value of the current of the external motor;
a judging unit (3) for judging whether the air conditioner satisfies a defrosting condition or not, based on the initial value, the measured value and the frosting threshold of the external motor current;
a control unit (4) for controlling the air conditioner to perform a defrosting operation if a defrosting condition is satisfied.
12. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the air conditioner defrost control method according to any one of claims 1-10.
13. A computer-readable storage medium storing a computer program which, when read and executed by a processor, implements the air conditioner defrost control method according to any one of claims 1-10.
CN202010182185.8A 2020-03-16 2020-03-16 Air conditioner defrosting control method and device, storage medium and air conditioner Pending CN111336648A (en)

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Application publication date: 20200626