CN113266932A - Method and device for controlling defrosting of air conditioner, storage medium and air conditioner - Google Patents
Method and device for controlling defrosting of air conditioner, storage medium and air conditioner Download PDFInfo
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- 238000010257 thawing Methods 0.000 title claims abstract description 234
- 238000000034 method Methods 0.000 title claims abstract description 53
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- 238000004364 calculation method Methods 0.000 description 2
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- 238000009833 condensation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
Abstract
The invention discloses a method and a device for controlling defrosting of an air conditioner, a storage medium and the air conditioner, wherein the method and the device for controlling defrosting of the air conditioner are used for a long-pipe air conditioner, and the method for controlling defrosting of the air conditioner comprises the following steps: detecting a heating mode of the air conditioner; acquiring the temperature of an outdoor coil and the actual running time of a compressor; and determining that the temperature of the outdoor coil is less than the target defrosting entrance temperature and the time difference between the defrosting entrance threshold value of the running time of the compressor and the actual running time of the compressor is more than the preset time, and controlling the air conditioner to enter a defrosting mode. The method for controlling the air conditioner to defrost can timely defrost the long-piping air conditioner, prevent the outdoor unit from being frosted or frozen seriously and defrost the air conditioner cleanly.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for controlling the defrosting of an air conditioner, a computer storage medium and the air conditioner.
Background
In the heating mode of the air conditioner, the outdoor unit may be frosted or even frozen, so that the air conditioner starts an automatic defrosting program at regular intervals or when the temperature of the outdoor unit reaches a certain condition.
For some air conditioners equipped with long piping, a certain amount of refrigerant needs to be added. However, the air conditioner itself cannot detect whether the long piping is configured, if the air conditioner is configured with the long piping, because the pressure drop of the long piping pipeline is increased, the frosting degree is more serious than the length of the standard piping during low-temperature heating, the air conditioner reaches the defrosting entry temperature soon after the heating operation starts in the low-temperature environment, and is limited by the operation time of the compressor, the air conditioner cannot enter the defrosting as soon as possible, and when the operation time condition of the compressor is met, the outdoor unit is frosted seriously and even freezes, so that the defrosting is difficult, and the problem that the defrosting is not clean exists.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, one of the objectives of the present invention is to provide a method for controlling defrosting of an air conditioner, in which, for a long-piping air conditioner, the air conditioner can immediately enter into defrosting, so as to prevent the outdoor unit from being seriously frosted or frozen and to defrost cleanly.
The second objective of the present invention is to provide a device for controlling defrosting of an air conditioner.
It is a further object of the present invention to provide a computer storage medium.
The fourth objective of the present invention is to provide an air conditioner.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for controlling defrosting of an air conditioner, which is used for a long-piping air conditioner, and includes: detecting a heating mode of the air conditioner; acquiring the temperature of an outdoor coil and the actual running time of a compressor; and determining that the temperature of the outdoor coil is less than the target defrosting entrance temperature and the time difference between the defrosting entrance threshold value of the running time of the compressor and the actual running time of the compressor is greater than the preset time, and controlling the air conditioner to enter a defrosting mode.
According to the method for controlling the defrosting of the air conditioner, which is provided by the embodiment of the invention, when the air conditioner is used in a long-piping air conditioner, the temperature of an outdoor coil is determined to be lower than the target defrosting entry temperature under the heating mode of the air conditioner, the condition that the outdoor unit of the air conditioner needs defrosting when the air conditioner reaches the defrosting entry temperature is indicated, the frosting degree of the long-piping air conditioner is more serious than that of the standard-piping air conditioner due to the increase of pipeline pressure, and if the defrosting cannot be carried out in time, the frosting is more serious, the subsequent defrosting is influenced and even the defrosting is not clean, therefore, the method provided by the embodiment of the invention determines that the temperature of the outdoor coil is lower than the target defrosting entry temperature, even if the time difference between the defrosting entry threshold of the running time of a compressor and the actual running time of the compressor is larger than the preset time, namely, the defrosting entry threshold of the running time of the compressor is not reached, namely, the running time condition of the compressor corresponding to the standard-piping length air conditioner is not met, and the air conditioner is forcibly controlled to enter a defrosting mode, so that the problems of difficult defrosting and unclean defrosting caused by serious frosting or icing of an outdoor unit when the long-piping air conditioner is used for heating can be avoided.
In some embodiments of the present invention, determining that the outdoor coil temperature is less than a target defrost entry temperature and a time difference between a compressor run time defrost entry threshold and the compressor actual run time is greater than a preset time, controlling the air conditioner to enter a defrost mode includes: detecting that the current operation of the compressor is the first power-on operation; acquiring a defrosting entry threshold value of the running time of the first power-on compressor; calculating a first time difference value between the defrosting entry threshold value of the running time of the first-time power-on compressor and the actual running time of the compressor; and determining that the temperature difference between the outdoor coil temperature and the target defrosting entrance temperature is smaller than a temperature difference threshold value and the first time difference value is larger than the preset time, and controlling the air conditioner to enter the defrosting mode.
In some embodiments of the present invention, a value range of the defrosting entry threshold value during the operation time of the first power-on compressor is 10min to 65min, and a value range of the preset time is 5min to 60 min.
In some embodiments of the present invention, the first power-on compressor operation time defrost entry threshold is 20min, and the preset time is 15 min.
In some embodiments of the present invention, determining that the outdoor coil temperature is less than a target defrost entry temperature and a time difference between a compressor run time defrost entry threshold and the compressor actual run time is greater than a preset time, controlling the air conditioner to enter a defrost mode includes: determining that the current operation of the compressor is the operation restarted after defrosting; acquiring a defrosting entry threshold value of the running time of the running restart compressor; calculating a second time difference value between the defrosting entry threshold value of the running time of the restarting running compressor and the actual running time of the compressor; and determining that the temperature difference between the outdoor coil temperature and the target defrosting entrance temperature is smaller than a temperature difference threshold value and the second time difference value is larger than the preset time, and controlling the air conditioner to enter the defrosting mode.
In some embodiments of the present invention, a value range of the defrosting entry threshold value for the running time of the restart operation compressor is 30min to 180min, and a value range of the preset time is 5min to 60 min.
In some embodiments of the present invention, the restart operation compressor operation time defrost entry threshold is 45min, and the preset time is 15 min.
In order to achieve the above object, an embodiment of a second aspect of the present invention provides an apparatus for controlling defrosting of an air conditioner, which is used for a long-piping air conditioner, the apparatus comprising: the detection module is used for detecting the heating mode of the air conditioner; the acquisition module is used for acquiring the outdoor coil temperature and the actual running time of the compressor; and the control module is used for determining that the temperature of the outdoor coil is less than the target defrosting entrance temperature and the time difference between the defrosting entrance threshold value of the running time of the compressor and the actual running time of the compressor is greater than the preset time, and controlling the air conditioner to enter a defrosting mode.
According to the device for controlling the air conditioner to defrost, disclosed by the embodiment of the invention, when the control module determines that the temperature of the outdoor coil is less than the target defrosting entrance temperature and the time difference between the defrosting entrance threshold value of the running time of the compressor and the actual running time of the compressor is more than the preset time, the control module controls the air conditioner to enter the defrosting mode, namely, the air conditioner is determined to meet the defrosting entrance temperature, the air conditioner is forcibly controlled to enter the defrosting mode even if the actual running time of the compressor does not reach the defrosting entrance threshold value of the running time of the compressor, and for the long-piping air conditioner, the problem of incomplete defrosting caused by difficult defrosting due to serious frosting or icing of an outdoor unit can be avoided.
In order to achieve the above object, a computer storage medium is provided in an embodiment of a third aspect of the present invention, and a computer program is stored thereon, where the computer program is executed by a processor to implement the method for controlling defrosting of an air conditioner according to any one of the above embodiments.
According to the computer storage medium of the embodiment of the invention, by storing the computer program capable of realizing the method for controlling the air conditioner to defrost in the above embodiment, when the computer storage medium is applied to a long-pipe air conditioner, the problems of difficult defrosting and unclean defrosting caused by serious frosting or icing of the outdoor unit can be avoided.
In order to achieve the above object, an embodiment of a fourth aspect of the present invention provides an air conditioner, including: the compressor, the indoor heat exchanger, the outdoor heat exchanger and the throttling element; the temperature sensor is used for detecting the temperature of the outdoor coil; the device for controlling defrosting of an air conditioner according to the second embodiment of the present invention is connected to the temperature sensor.
According to the air conditioner provided by the embodiment of the invention, by adopting the device for controlling the defrosting of the air conditioner provided by the embodiment of the second aspect, the problems of difficult defrosting and unclean defrosting caused by serious frosting or icing of the outdoor unit of the long-pipe air conditioner can be avoided.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a method of controlling defrosting of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a method of controlling defrosting of an air conditioner according to another embodiment of the present invention;
fig. 3 is a flowchart of a method of controlling defrosting of an air conditioner according to still another embodiment of the present invention;
fig. 4 is a block diagram of an apparatus for controlling defrosting of an air conditioner according to an embodiment of the present invention;
fig. 5 is a block diagram of an air conditioner according to an embodiment of the present invention.
Reference numerals:
an air conditioner 100;
the device for controlling defrosting of the air conditioner 10, the compressor 20, the indoor heat exchanger 30, the outdoor heat exchanger 40, the throttling element 50, the temperature sensor 60;
the device comprises a detection module 1, an acquisition module 2 and a control module 3.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
In order to solve the problems that the long-piping air conditioner meets the condition of defrosting entrance temperature in the heating mode, the outdoor unit is frosted seriously or even freezes due to the fact that the outdoor unit cannot enter the defrosting mode as soon as possible because of the limitation of the running time of a compressor, defrosting is difficult and defrosting is not clean, and the like, the embodiment of the invention provides a method for controlling the air conditioner to defrost and the air conditioner adopting the method, and the method is suitable for the long-piping air conditioner.
In the embodiment of the invention, the long-piping air conditioner is an air conditioner provided with a long-length refrigerant pipeline, the long piping can be considered as a long piping compared with a standard piping, the air conditioner adopting a long-piping installation mode has the advantages that the pressure drop of the long-piping pipeline is increased, the frosting degree is more serious than that of the air conditioner adopting the standard piping in a heating mode, and the outdoor unit is easily frosted seriously when the defrosting entering temperature is reached and the defrosting is not entered in time, so that the subsequent defrosting is difficult and even the defrosting is not clean.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the 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 application.
The air conditioner performs a cooling/heating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. Wherein the refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigerating effect by heat exchange with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. The air conditioner is used as a heater in a heating mode when the indoor heat exchanger is used as a condenser, and as a cooler in a cooling mode when the indoor heat exchanger is used as an evaporator.
An air conditioner according to some embodiments of the present application includes an air conditioner indoor unit installed in an indoor space. The indoor unit, i.e., the indoor unit, is connected to an outdoor unit, i.e., the outdoor unit, installed in an outdoor space through a pipe. The outdoor unit of the air conditioner may be provided with a compressor, an outdoor heat exchanger, an outdoor fan, an expander and the like for a refrigeration cycle, and the indoor unit of the air conditioner may be provided with an indoor heat exchanger and an indoor fan.
A method of controlling defrosting of an air conditioner according to an embodiment of the present invention will be described with reference to fig. 1 to 3. It should be noted that the step numbers in the present application, such as S1, S2, S3, etc., are only for convenience of describing the present solution, and are not to be construed as limiting the order of the steps. That is, the execution order of, for example, steps S1, S2, S3, etc. may be specifically determined according to actual needs, and is not limited to the control in the order of steps in the following embodiments.
As shown in fig. 1, a flowchart of a method for controlling defrosting of an air conditioner is shown, wherein the method for controlling defrosting of an air conditioner is used for a long-piping air conditioner, and the method at least comprises steps S1-S3, which are described as follows.
And S1, detecting the air conditioner to operate in a heating mode.
In some embodiments of the present invention, after the air conditioner is powered on and started to operate, the ambient temperature, humidity, and the like may be automatically detected, and if it is determined that the conditions of the heating mode are met based on the detected ambient parameters and the like, the heating operation may be automatically performed, or the user may set the operation mode of the air conditioner to the heating mode through a remote controller as needed. The air conditioner is under the mode of heating, and the outdoor heat exchanger of off-premises station is used as the evaporimeter, and the evaporimeter need absorb external heat when evaporating the refrigerant, and the outdoor air temperature reduces can form the comdenstion water on the outdoor heat exchanger, and when outdoor temperature was extremely low, the comdenstion water can become the frost to lead to the off-premises station to frost, when the air conditioner lastingly heats, frost can constantly become the thickening, leads to the off-premises station to freeze even.
And S2, acquiring the outdoor coil temperature and the actual running time of the compressor.
The outdoor coil temperature can be collected in real time by arranging the temperature sensor, the compressor starts to operate or the compressor restarts to operate after the air conditioner is powered on, the operation time of the compressor starts to be recorded at the moment, and the recorded operation time of the compressor is used as the actual operation time of the compressor.
And S3, determining that the temperature of the outdoor coil is less than the target defrosting entrance temperature and the time difference between the defrosting entrance threshold value of the running time of the compressor and the actual running time of the compressor is more than the preset time, and controlling the air conditioner to enter a defrosting mode.
Here, the compressor operation time defrost entry threshold may be understood as a compressor operation time threshold that corresponds to the compressor operation time threshold that is satisfied by entry defrost of an air conditioner using a standard piping length.
In an embodiment, the target defrosting entry temperature and the preset time may be set under a laboratory condition or as needed, the temperature difference threshold and the target defrosting entry temperature are pre-stored in a Central Processing Unit (CPU) of the air conditioner, and the pre-stored temperature difference threshold and the target defrosting entry temperature may be directly called when defrosting is performed in the heating mode.
Specifically, the outdoor coil temperature is determined to be less than the target defrosting entry temperature, namely the defrosting entry temperature is met, which indicates that the outdoor unit of the air conditioner needs to be defrosted currently, for the long-piping air conditioner, the frosting degree is more serious than that of the standard piping air conditioner due to the increase of the pipeline pressure, and if the defrosting cannot be performed in time, the frosting is easily serious, the subsequent defrosting is affected and even the defrosting is not clean, the method of the embodiment of the invention determines that the outdoor coil temperature is less than the target defrosting entry temperature, and even if the time difference between the defrosting entry threshold value of the running time of the compressor and the actual running time of the compressor is greater than the preset time, namely the defrosting entry threshold value of the running time of the compressor is not reached, namely the running time condition of the compressor of the air conditioner with the standard piping length is not met, the defrosting entry threshold value is forcibly controlled to defrost, for example, the outdoor heat exchanger is switched to a refrigeration mode to heat the outdoor heat exchanger or the heating mode is suspended to naturally defrost when the outdoor temperature is not too low, therefore, defrosting can be carried out in time, and the problems of difficult defrosting, unclean defrosting and the like caused by serious frosting of the outdoor unit are avoided.
In some embodiments of the present invention, in the heating mode of the air conditioner, when it is determined that the outdoor heat exchanger is frosted, the air conditioner is controlled to defrost, for example, the compressor is controlled to stop or reduce the speed, and the like, and the air conditioner is switched to the cooling mode, and when the defrosting end condition is reached, the defrosting mode is exited, and the compressor is controlled to restart again to operate normally, and the cycle is repeated. Thus, during the operation of the air conditioner, there may be a plurality of defrosting processes. In the two processes, the frosting conditions of the outdoor heat exchanger are different, so that a defrosting entry threshold of the running time of the compressor which is electrified for the first time and a defrosting entry threshold of the running time of the compressor which is restarted for running are set respectively, and in the embodiment, the defrosting entry threshold of the running time of the compressor which is electrified for the first time is smaller than the defrosting entry threshold of the running time of the compressor which is restarted for running.
The following describes a defrosting control process in which the compressor is powered on for the first time and a defrosting control process in which the compressor is restarted after defrosting, respectively.
In some embodiments of the present invention, as shown in fig. 2, which is a flowchart of a method for controlling defrosting of an air conditioner according to another embodiment of the present invention, the method for controlling defrosting of an air conditioner includes determining that the outdoor coil temperature is less than the target defrosting entry temperature and that the time difference between the compressor running time defrosting entry threshold and the compressor actual running time is greater than the preset time, and controlling the air conditioner to enter the defrosting mode, i.e., the step S3 includes at least steps S31-S34, as follows.
And S31, detecting that the current operation of the compressor is the first power-on operation.
For example, the air conditioner is powered on, a remote control signal of a remote controller is received, a heating mode is started, and the compressor is powered on and operated, namely the compressor is powered on and operated for the first time.
And S32, acquiring the defrosting entry threshold of the first power-on compressor running time.
The defrosting entry threshold of the first-time power-on compressor running time can be set by referring to the compressor running time threshold of the air conditioner with a conventional length of piping during defrosting, for example, the defrosting entry threshold of the first-time power-on compressor running time can be preset and stored in a CPU of the air conditioner under laboratory conditions, and the pre-stored defrosting entry threshold of the first-time power-on compressor running time can be called after the air conditioner enters an automatic defrosting program.
Specifically, in some embodiments, the value of the first power-on compressor running time defrost entry threshold may be in a range of 10min to 65min, for example, the first power-on compressor running time defrost entry threshold may be 10min, 25min, 40min, or 65min, and the like, and preferably, the first power-on compressor running time defrost entry threshold is set to 20 min. If the air conditioner is provided with the long tubing, when the air conditioner is powered on for the first time to operate and heat, the temperature of the outdoor coil pipe can quickly reach the target defrosting entering temperature, the defrosting entering threshold value of the running time of the compressor is set to be 20min, and the time is short, so that the air conditioner is controlled to execute defrosting action as soon as possible.
S33, calculating a first time difference value between the defrosting entry threshold value of the running time of the first powered-on compressor and the actual running time of the compressor.
After the compressor is powered on and started for the first time, recording the running time of the compressor as the actual running time of the compressor, calling the pre-stored running time of the compressor powered on for the first time to defrost and enter a threshold value, and performing subtraction calculation on the threshold value and the actual running time of the compressor to obtain a first time difference value.
And S34, determining that the temperature difference between the outdoor coil temperature and the target defrosting entrance temperature is smaller than the temperature difference threshold value and the first time difference value is larger than the preset time, and controlling the air conditioner to enter a defrosting mode.
The method comprises the steps that the temperature difference between the temperature of the outdoor coil and the target defrosting inlet temperature is determined to be smaller than a temperature difference threshold value, namely the defrosting inlet temperature is met, the outdoor heat exchanger is frosted and needs defrosting, if the outdoor heat exchanger is not in time, the outdoor heat exchanger is in a defrosting mode, the outdoor heat exchanger is in a frosting state seriously, the defrosting is difficult, the defrosting is not clean, and the like.
In some embodiments of the present invention, the preset time may range from 5min to 60min, for example, the preset time may be 5min, 10min, 20min, 30min, 45min, or 60 min. Preferably, the preset time is selected to be 15 min.
In some embodiments, the temperature threshold may range from 3 ℃ to 10 ℃, preferably the temperature threshold is 5 ℃.
The following takes the example that the defrosting entry threshold value of the running time of the first electrifying compressor is 20min, the preset time is 15min, and the temperature threshold value is 5 ℃. Specifically, the method comprises the steps of detecting that the current operation of the compressor is the first power-on operation, recording the actual operation time of the compressor, acquiring the temperature of an outdoor coil, calling a defrosting entry threshold value of the operation time of the first power-on compressor for 20min and a temperature threshold value of 5 ℃, calculating a first time difference value between the defrosting entry threshold value of the operation time of the first power-on compressor and the actual operation time of the compressor, and calculating the temperature difference between the temperature of the outdoor coil and the target defrosting entry temperature, wherein if the temperature difference value is 3 ℃, namely the temperature difference value is smaller than the temperature difference threshold value, then the defrosting is needed to be carried out on the outdoor unit, if the first time difference value is 20min, namely the first time difference value is larger than a preset time for 15min, namely, although the defrosting entry threshold value of the defrosting operation time of the compressor is not reached, the defrosting is controlled to be carried out, so that the defrosting can be carried out in time, and for the long-piping air conditioner, the outdoor unit can be prevented from being frosted seriously, the defrosting difficulty is reduced, and the incomplete defrosting is prevented.
In other embodiments of the present invention, as shown in fig. 3, which is a flowchart of a method for controlling a defrost of an air conditioner according to another embodiment of the present invention, wherein it is determined that the outdoor coil temperature is less than the target defrost entry temperature and the time difference between the compressor operation time defrost entry threshold and the compressor actual operation time is greater than the preset time, the air conditioner is controlled to enter the defrost mode, that is, the above step S3 further includes steps S35-S38, as follows.
And S35, determining that the current operation of the compressor is the operation restarted after defrosting.
For example, during the heating operation of the air conditioner, a plurality of defrosting processes exist, each time defrosting is finished, the compressor needs to be restarted, and the running state of the compressor is detected to determine that the compressor is restarted.
And S36, acquiring the running time defrosting entrance threshold value of the running restart compressor.
Specifically, the restart operation compressor running time defrosting entry threshold value can be preset and stored in a CPU of the air conditioner under laboratory conditions, and the preset restart operation compressor running time defrosting entry threshold value is called after the air conditioner enters an automatic defrosting program.
In some embodiments, the value of the defrosting entry threshold for the running time of the restart operation compressor may be in a range of 30min to 180min, for example, the defrosting entry threshold for the running time of the restart operation compressor is 30min, 75min, 120min or 180min, and preferably, the defrosting entry threshold for the running time of the restart operation compressor is 45 min.
S37, a second difference between the restart operation compressor operation time defrost entry threshold and the compressor actual operation time is calculated.
After the compressor is restarted, recording the running time of the compressor as the actual running time of the compressor, calling the prestored running time of the compressor in the restarting operation to defrost and enter a threshold value, and performing subtraction calculation on the running time of the compressor and the actual running time of the compressor to obtain a second time difference value.
And S38, determining that the temperature difference between the outdoor coil temperature and the target defrosting entrance temperature is smaller than the temperature difference threshold value and the second difference value is larger than the preset time, and controlling the air conditioner to enter a defrosting mode.
The method comprises the steps of determining that the temperature difference between the temperature of the outdoor coil and a target defrosting inlet temperature is smaller than a temperature difference threshold value, namely meeting the defrosting inlet temperature, defrosting is required when an outdoor heat exchanger is frosted, if the outdoor heat exchanger is not in a defrosting mode in time, the problems that the outdoor unit is difficult to defrost due to serious frosting and cannot be defrosted completely and the like are caused.
In some embodiments of the present invention, the preset time may range from 5min to 60min, for example, the preset time may be 5min, 10min, 20min, 30min, 45min, or 60 min. Preferably, the preset time is selected to be 15 min.
In some embodiments, the temperature threshold may range from 3 ℃ to 10 ℃, preferably the temperature threshold is 5 ℃.
In the following, the operation time defrosting entrance threshold value of the restart operation compressor is 40min, the preset time is 15min, and the temperature threshold value is 5 ℃ as an example. Specifically, the method comprises the steps of detecting that the current operation of the compressor is a restart operation, recording the actual operation time of the compressor, acquiring the temperature of an outdoor coil, calling a defrosting entry threshold value of 45min and a temperature threshold value of 5 ℃ for the operation time of the restart operation of the compressor, calculating a second time difference value between the defrosting entry threshold value of the operation time of the restart operation of the compressor and the actual operation time of the compressor, and calculating the temperature difference between the temperature of the outdoor coil and a target defrosting entry temperature, wherein if the temperature difference value is 3 ℃, namely the temperature difference value is smaller than the temperature difference threshold value, the defrosting of the outdoor unit is needed, if the second time difference value is 20min, namely the second time difference value is larger than the preset time of 15min, namely the defrosting entry threshold value of the operation time of the compressor is not reached, the air conditioner is controlled to defrost, so that the defrosting can be carried out in time, and for the long-piping air conditioner, the frosting of the outdoor unit can be prevented from being serious, reduce the defrosting difficulty and prevent the unclean defrosting.
In brief, the method for controlling the air conditioner to defrost according to the embodiment of the present invention indicates that the outdoor unit is frosted and needs to defrost when the temperature of the outdoor coil meets the defrosting entrance temperature condition, and controls the air conditioner to defrost when the actual running time of the compressor does not reach the defrosting entrance threshold value in time, that is, the time difference is greater than the preset time, so that the long-piping air conditioner can defrost in time, thereby preventing the defrosting from being affected and preventing the unclean defrosting from being caused due to severe frosting of the outdoor unit.
An apparatus for controlling defrosting of an air conditioner according to an embodiment of the second aspect of the present invention will be described with reference to fig. 4.
In some embodiments of the present invention, as shown in fig. 4, a block diagram of an apparatus for controlling defrosting of an air conditioner is shown, wherein the apparatus 10 for controlling defrosting of an air conditioner is used for a long-pipe air conditioner, and the apparatus 10 for controlling defrosting of an air conditioner comprises a detection module 1, an acquisition module 2 and a control module 3.
The detection module 1 is used for detecting the heating mode of the air conditioner. The air conditioner can automatically detect the ambient temperature, the ambient humidity and the like after being electrified and started, and automatically executes heating actions if the conditions of the operation heating mode are judged to be met based on the detected ambient parameters and the like, or a user can set the operation mode of the air conditioner to be the heating mode through a remote controller according to needs, and the detection module 1 detects the operation heating mode of the air conditioner.
The acquisition module 2 is used for acquiring the outdoor coil temperature and the actual running time of the compressor. The outdoor coil temperature can be detected in real time through the temperature sensor, and the detected outdoor coil temperature is transmitted to the acquisition module 2. And when the compressor is started, the obtaining module 2 records the running time of the compressor as the actual running time of the compressor.
The control module 3 is used for determining that the temperature of the outdoor coil is less than the target defrosting entrance temperature and the time difference between the defrosting entrance threshold value of the running time of the compressor and the actual running time of the compressor is more than the preset time, and controlling the air conditioner to enter a defrosting mode.
For example, the control module 3 may include a CPU of an air conditioner, etc., in which a program is stored, and the program runs to execute the method for controlling defrosting of an air conditioner according to the above embodiment of the first aspect.
In the heating mode of the air conditioner, the control module 3 firstly determines the running state of the compressor as the first power-on running or the restarting running, calls a corresponding first power-on compressor running time defrosting entering threshold or a restarting running compressor running time defrosting entering threshold and calls a target defrosting entering temperature, and the control module 3 judges according to the obtained outdoor coil temperature, the actual compressor running time and the corresponding compressor running time defrosting entering threshold so as to determine that the air conditioner meets the defrosting condition.
Specifically, when the compressor running state is the first power-on running state, the control module 3 determines that the outdoor coil temperature is less than the target defrosting entering temperature and the time difference between the defrosting entering threshold value of the first power-on compressor running time and the actual compressor running time is greater than the preset time, and controls the air conditioner to enter the defrosting mode.
Or, when the compressor running state is restart running, the control module 3 determines that the outdoor coil temperature is less than the target defrosting entering temperature and the time difference between the defrosting entering threshold value of the restart running compressor running time and the actual running time of the compressor is greater than the preset time, and controls the air conditioner to enter the defrosting mode.
According to the device 10 for controlling the air conditioner to defrost provided by the embodiment of the invention, when the control module 3 determines that the temperature of the outdoor coil is less than the target defrosting entrance temperature and the time difference between the defrosting entrance threshold value of the running time of the compressor and the actual running time of the compressor is greater than the preset time, the air conditioner is controlled to enter the defrosting mode, namely, the air conditioner is determined to meet the defrosting entrance temperature, the air conditioner is forcibly controlled to enter the defrosting mode even if the actual running time of the compressor does not reach the defrosting entrance threshold value of the running time of the compressor, and for the long-piping air conditioner, the problems of difficult defrosting and unclean defrosting caused by serious frosting or icing of an outdoor unit can be avoided.
In some embodiments of the present invention, a computer storage medium is also provided, in which a computer program is stored, and the computer program, when executed by a processor, can implement the method for controlling defrosting of an air conditioner according to the first aspect of the embodiments.
According to the computer storage medium of the embodiment of the invention, the computer program is stored on the computer storage medium, when the computer program runs, the computer program can acquire the running parameters of each structure in the air conditioner to analyze and calculate, and control the outdoor unit to execute the defrosting task, so as to realize the method for controlling the air conditioner to defrost, and the computer program can be directly applied to the existing long-piping air conditioner, so that the problems of difficult defrosting and unclean defrosting caused by serious frosting or icing of the outdoor unit can be avoided.
In some embodiments of the present invention, as shown in fig. 5, there is a block diagram of an air conditioner according to an embodiment of the present invention, wherein the air conditioner 100 includes a compressor 20, an indoor heat exchanger 30, an outdoor heat exchanger 40, a throttling element 50, a temperature sensor 60, and the apparatus 10 for controlling defrosting of an air conditioner according to the above second aspect embodiment.
Wherein the indoor heat exchanger 30 functions as a condenser when the air conditioner 100 operates in the heating mode, and the outdoor heat exchanger 40 functions as a condenser when the air conditioner 100 operates in the defrosting mode.
The temperature sensor 60 is used to detect the outdoor coil temperature, for example, the temperature sensor 60 may be disposed in the middle of the outdoor coil, and the detected outdoor coil temperature is more accurate. The apparatus for controlling defrosting of an air conditioner 10 is connected to a temperature sensor 60. The temperature sensor 60 detects the temperature of the outdoor coil in real time and sends the temperature information to the device for controlling air conditioner to defrost 10, and the device for controlling air conditioner to defrost 10 executes the method for controlling air conditioner to defrost according to the first embodiment to control the air conditioner 100 to defrost the outdoor unit.
According to the air conditioner 100 of the embodiment of the present invention, by using the apparatus 10 for controlling defrosting of an air conditioner of the above embodiment and executing the method for controlling defrosting of an air conditioner of the first embodiment, the problems of difficult defrosting and unclean defrosting of a long-piping air conditioner due to severe frosting or icing of an outdoor unit can be avoided.
Other configurations and operations of the air conditioner 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A method of controlling defrosting of an air conditioner, for use in a long-piped air conditioner, the method comprising:
detecting a heating mode of the air conditioner;
acquiring the temperature of an outdoor coil and the actual running time of a compressor;
and determining that the temperature of the outdoor coil is less than the target defrosting entrance temperature and the time difference between the defrosting entrance threshold value of the running time of the compressor and the actual running time of the compressor is greater than the preset time, and controlling the air conditioner to enter a defrosting mode.
2. The method of controlling an air conditioner defrost according to claim 1, wherein determining that the outdoor coil temperature is less than a target defrost entry temperature and a time difference between a compressor run time defrost entry threshold and the compressor actual run time is greater than a preset time, controlling the air conditioner to enter a defrost mode comprises:
detecting that the current operation of the compressor is the first power-on operation;
acquiring a defrosting entry threshold value of the running time of the first power-on compressor;
calculating a first time difference value between the defrosting entry threshold value of the running time of the first-time power-on compressor and the actual running time of the compressor;
and determining that the temperature difference between the outdoor coil temperature and the target defrosting entrance temperature is smaller than a temperature difference threshold value and the first time difference value is larger than the preset time, and controlling the air conditioner to enter the defrosting mode.
3. The method for controlling the defrosting of the air conditioner according to claim 2, wherein the value of the defrosting entry threshold value of the operation time of the first power-on compressor is in a range of 10min to 65min, and the value of the preset time is in a range of 5min to 60 min.
4. The method for controlling defrosting of an air conditioner according to claim 3, wherein the first power-on compressor operation time defrosting entry threshold is 20min, and the preset time is 15 min.
5. The method of controlling an air conditioner defrost according to claim 1, wherein determining that the outdoor coil temperature is less than a target defrost entry temperature and a time difference between a compressor run time defrost entry threshold and the compressor actual run time is greater than a preset time, controlling the air conditioner to enter a defrost mode comprises:
determining that the current operation of the compressor is the operation restarted after defrosting;
acquiring a defrosting entry threshold value of the running time of the running restart compressor;
calculating a second time difference value between the defrosting entry threshold value of the running time of the restarting running compressor and the actual running time of the compressor;
and determining that the temperature difference between the outdoor coil temperature and the target defrosting entrance temperature is smaller than a temperature difference threshold value and the second time difference value is larger than the preset time, and controlling the air conditioner to enter the defrosting mode.
6. The method for controlling the defrosting of the air conditioner according to claim 4, wherein the defrosting entry threshold value ranges from 30min to 180min when the compressor is restarted, and the preset time ranges from 5min to 60 min.
7. The method for controlling defrosting of an air conditioner according to claim 6, wherein the restart operation compressor operation time defrosting entry threshold is 45min, and the preset time is 15 min.
8. An apparatus for controlling defrosting of an air conditioner, which is used for a long-piping air conditioner, the apparatus comprising:
the detection module is used for detecting the heating mode of the air conditioner;
the acquisition module is used for acquiring the outdoor coil temperature and the actual running time of the compressor;
and the control module is used for determining that the temperature of the outdoor coil is less than the target defrosting entrance temperature and the time difference between the defrosting entrance threshold value of the running time of the compressor and the actual running time of the compressor is greater than the preset time, and controlling the air conditioner to enter a defrosting mode.
9. A computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method of controlling defrosting of an air conditioner according to any one of claims 1 to 7.
10. An air conditioner, comprising:
the compressor, the indoor heat exchanger, the outdoor heat exchanger and the throttling element;
the temperature sensor is used for detecting the temperature of the outdoor coil;
the apparatus for controlling defrosting of an air conditioner according to claim 8, which is connected to the temperature sensor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883679A (en) * | 2021-09-26 | 2022-01-04 | 青岛海尔中央空调有限公司 | Defrosting control method for air conditioner |
| CN114279045A (en) * | 2021-12-08 | 2022-04-05 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device and air conditioner |
| CN114909776A (en) * | 2022-05-30 | 2022-08-16 | 海信（广东）空调有限公司 | Air conditioner and defrosting control method thereof |
| WO2022222545A1 (en) * | 2021-04-23 | 2022-10-27 | 美的集团武汉暖通设备有限公司 | Defrosting control method, storage medium, and air conditioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11344275A (en) * | 1998-06-01 | 1999-12-14 | Daikin Ind Ltd | Method for detecting piping length in air conditioner and air conditioner in which the method is applied |
| CN102230660A (en) * | 2011-06-03 | 2011-11-02 | 龚光彩 | Adaptive anti-defrosting control method for heat pump device |
| CN105143782A (en) * | 2013-07-31 | 2015-12-09 | 富士通将军股份有限公司 | Air conditioner |
| CN106679117A (en) * | 2017-01-24 | 2017-05-17 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method and device |
| CN110469959A (en) * | 2019-07-24 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN111306704A (en) * | 2020-02-28 | 2020-06-19 | 青岛海尔空调器有限总公司 | Method and device for controlling air conditioner and air conditioner |
-
2021
- 2021-05-18 CN CN202110539713.5A patent/CN113266932A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11344275A (en) * | 1998-06-01 | 1999-12-14 | Daikin Ind Ltd | Method for detecting piping length in air conditioner and air conditioner in which the method is applied |
| CN102230660A (en) * | 2011-06-03 | 2011-11-02 | 龚光彩 | Adaptive anti-defrosting control method for heat pump device |
| CN105143782A (en) * | 2013-07-31 | 2015-12-09 | 富士通将军股份有限公司 | Air conditioner |
| CN106679117A (en) * | 2017-01-24 | 2017-05-17 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method and device |
| CN110469959A (en) * | 2019-07-24 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN111306704A (en) * | 2020-02-28 | 2020-06-19 | 青岛海尔空调器有限总公司 | Method and device for controlling air conditioner and air conditioner |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022222545A1 (en) * | 2021-04-23 | 2022-10-27 | 美的集团武汉暖通设备有限公司 | Defrosting control method, storage medium, and air conditioner |
| CN113883679A (en) * | 2021-09-26 | 2022-01-04 | 青岛海尔中央空调有限公司 | Defrosting control method for air conditioner |
| WO2023045320A1 (en) * | 2021-09-26 | 2023-03-30 | 青岛海尔中央空调有限公司 | Defrosting control method for air conditioner |
| CN114279045A (en) * | 2021-12-08 | 2022-04-05 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device and air conditioner |
| CN114909776A (en) * | 2022-05-30 | 2022-08-16 | 海信（广东）空调有限公司 | Air conditioner and defrosting control method thereof |
| CN114909776B (en) * | 2022-05-30 | 2023-10-31 | 海信（广东）空调有限公司 | Air conditioner and defrosting control method thereof |
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Address after: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant after: Hisense Air Conditioning Co.,Ltd. Address before: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. |
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Application publication date: 20210817 |