CN111425993A - Snow accumulation preventing method and device for air conditioner and air conditioner - Google Patents
Snow accumulation preventing method and device for air conditioner and air conditioner Download PDFInfo
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- CN111425993A CN111425993A CN202010288954.2A CN202010288954A CN111425993A CN 111425993 A CN111425993 A CN 111425993A CN 202010288954 A CN202010288954 A CN 202010288954A CN 111425993 A CN111425993 A CN 111425993A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- 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
- F24F11/88—Electrical aspects, e.g. circuits
Abstract
The invention provides an air conditioner snow accumulation preventing method, an air conditioner snow accumulation preventing device and an air conditioner, wherein the method comprises the following steps: after the air conditioner is powered on, acquiring the outdoor environment temperature; judging whether the air conditioner meets the snow accumulation risk condition or not according to the outdoor environment temperature; if the accumulated snow risk condition is met, acquiring the current of an air conditioner external fan; judging whether the air conditioner meets the accumulated snow condition or not according to the current of the outer fan and a preset limit current; and if the accumulated snow condition is met, executing a first snow removing operation. Therefore, the accumulated snow condition of the air conditioner outdoor unit can be judged directly through the current of the external fan, and snow can be removed directly after accumulated snow is accumulated; not only can avoid snow to increase the resistance when starting, can also avoid snow to lead to the air conditioner when normally operating outer quick-witted heat transfer bad to guaranteed that the energy efficiency ratio of air conditioner does not reduce because of snow, the air conditioner energy consumption does not increase because of snow.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner snow accumulation preventing method and device and an air conditioner.
Background
The top-outlet air conditioner outdoor unit is usually installed on the top of a building or outdoors in the open air, and a large amount of snow is easily accumulated on the top of the outdoor unit and even on a fan due to snow falling after the outdoor unit stops running for a long time in winter. In case of accumulated snow, resistance during starting can be increased, poor heat exchange of an outer machine during normal operation of the air conditioner can be caused, the energy efficiency ratio of the air conditioner is reduced, and energy consumption of the air conditioner is increased in a phase-changing mode.
Therefore, the air conditioner is a common configuration of the air conditioner in the snowfall area for snow accumulation prevention. However, the existing snow protection method generally judges whether snow is generated or not through weather information, and the accuracy is too low.
Disclosure of Invention
The invention solves the problem that the accuracy of the existing snow accumulation prevention judgment method is too low.
In order to solve the above problems, the present invention firstly provides an air conditioner snow accumulation prevention method, which comprises:
after the air conditioner is powered on, acquiring the outdoor environment temperature;
judging whether the air conditioner meets the snow accumulation risk condition or not according to the outdoor environment temperature;
if the accumulated snow risk condition is met, acquiring the current of an air conditioner external fan;
judging whether the air conditioner meets the accumulated snow condition or not according to the current of the outer fan and a preset limit current;
and if the accumulated snow condition is met, executing a first snow removing operation.
Therefore, the accumulated snow condition of the air conditioner outdoor unit can be judged directly through the current of the outer fan, and snow can be removed directly after accumulated snow. Therefore, resistance when the accumulated snow is increased to start can be avoided, poor heat exchange of the outer unit can be avoided when the accumulated snow causes normal running of the air conditioner, the energy efficiency ratio of the air conditioner is guaranteed not to be reduced due to the accumulated snow, and energy consumption of the air conditioner is not increased due to the accumulated snow.
Optionally, when the following conditions are met, determining that the air conditioner meets the snow cover risk condition: the outdoor environment temperature is less than the accumulated snow temperature threshold.
Like this, can judge the environment that has the snow risk through snow temperature threshold value to avoid carrying out the snow detection of unnecessary, prevent to detect the normal use that disturbs the air conditioner because of the snow.
Optionally, if satisfy snow risk condition, then acquire air conditioner outer fan electric current, include:
controlling the outer fan to operate at a preset rotating speed for a first time;
the outer fan current is read.
Therefore, the accurate current of the outer fan under the current condition can be obtained through stable operation for a period of time, so that the accuracy of the obtained current of the outer fan is improved, and the corresponding current snow situation is more accurate.
Optionally, the first snow removing operation is: and closing the outer fan, starting electric heating and operating for a second time.
By closing the outer fan, the interference of the fan operation on the electric heating can be prevented, and the snow removing speed is improved.
Optionally, if the snow accumulation condition is satisfied, after the first snow removing operation is performed, the method further includes:
reacquiring the outer fan current;
judging whether the air conditioner meets the snow accumulation condition or not according to the newly acquired current of the outer fan and a preset limit current;
and if so, executing second snow removing operation.
Therefore, after accumulated snow begins to be removed, the accumulated snow condition of the air conditioner outdoor unit can be continuously judged through the current of the outer fan, and snow removal is continuously carried out after accumulated snow still exists. Therefore, resistance when the accumulated snow is increased to start can be avoided, poor heat exchange of the outer unit can be avoided when the accumulated snow causes normal running of the air conditioner, the energy efficiency ratio of the air conditioner is guaranteed not to be reduced due to the accumulated snow, and energy consumption of the air conditioner is not increased due to the accumulated snow.
Optionally, when the following conditions are met, determining that the air conditioner meets the snow accumulation condition: the outer fan current is less than the limiting current.
Like this, can carry out accurate judgement to the snow circumstances to in time trigger the snow removing action behind the snow, clear away snow, the resistance when avoiding snow to increase the start, and outer quick-witted heat transfer is bad when avoiding snow to lead to the air conditioner normal operating.
Optionally, after executing the second snow removing operation if the first snow removing operation is satisfied, the method further includes:
re-executing the re-acquiring the outer fan current.
In this way, the snow accumulation condition is judged again, and the corresponding snow removal operation or transition operation is executed after the judgment; thus, a cycle of detection, judgment and execution is formed until the accumulated snow is cleared.
Optionally, after judging whether the air conditioner satisfies the snow condition according to the reacquired outer fan current and the preset limit current, the method further includes:
if not, after the transitional operation is executed, the air conditioner is controlled to start according to a preset operation mode.
Optionally, the transition operation is: and (5) turning off the electric heating, and increasing the rotating speed of the outer fan to the default rotating speed.
Therefore, the normal operation mode of the air conditioner can be stably transited from the snow removing operation to the operation of the air conditioner through the transition operation, so that the interference of the snow removing operation on the normal operation of the air conditioner is avoided, and the operation efficiency of the air conditioner is improved.
Optionally, the reacquiring the outer fan current includes: and controlling the outer fan to operate at a preset rotating speed for a first time period, and then reading the current of the outer fan.
Therefore, the accurate current of the outer fan under the current condition can be obtained through stable operation for a period of time, so that the accuracy of the obtained current of the outer fan is improved, and the corresponding current snow situation is more accurate.
Optionally, the second snow removing operation is: and keeping the electric heating and the starting state of the outer fan and operating for a third time.
Therefore, the reaction speed can be increased on the basis of continuously removing snow, and the normal operation of the air conditioner can be timely recovered after snow removal is finished.
Secondly, provide an air conditioner snow protection device, it includes:
the acquiring unit is used for acquiring the outdoor environment temperature after the air conditioner is powered on;
the judging unit is used for judging whether the air conditioner meets the accumulated snow risk condition or not according to the outdoor environment temperature;
the acquiring unit is also used for acquiring the current of an air conditioner external fan if the accumulated snow risk condition is met;
the judging unit is also used for judging whether the air conditioner meets the accumulated snow condition or not according to the current of the outer fan and a preset limit current;
a control unit configured to execute a first snow removing operation if the snow accumulation condition is satisfied.
Therefore, the accumulated snow condition of the air conditioner outdoor unit can be judged directly through the current of the outer fan, and snow can be removed directly after accumulated snow. Therefore, resistance when the accumulated snow is increased to start can be avoided, poor heat exchange of the outer unit can be avoided when the accumulated snow causes normal running of the air conditioner, the energy efficiency ratio of the air conditioner is guaranteed not to be reduced due to the accumulated snow, and energy consumption of the air conditioner is not increased due to the accumulated snow.
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 snow protection method as described above.
Therefore, the accumulated snow condition of the air conditioner outdoor unit can be judged directly through the current of the outer fan, and snow can be removed directly after accumulated snow. Therefore, resistance when the accumulated snow is increased to start can be avoided, poor heat exchange of the outer unit can be avoided when the accumulated snow causes normal running of the air conditioner, the energy efficiency ratio of the air conditioner is guaranteed not to be reduced due to the accumulated snow, and energy consumption of the air conditioner is not increased due to the accumulated snow.
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 snow accumulation prevention method is realized.
Therefore, the accumulated snow condition of the air conditioner outdoor unit can be judged directly through the current of the outer fan, and snow can be removed directly after accumulated snow. Therefore, resistance when the accumulated snow is increased to start can be avoided, poor heat exchange of the outer unit can be avoided when the accumulated snow causes normal running of the air conditioner, the energy efficiency ratio of the air conditioner is guaranteed not to be reduced due to the accumulated snow, and energy consumption of the air conditioner is not increased due to the accumulated snow.
Drawings
FIG. 1 is a flow chart of an air conditioner snow accumulation prevention method according to an embodiment of the present invention;
FIG. 2 is a flowchart of an air conditioner snow accumulation prevention method according to another embodiment of the present invention;
FIG. 3 is a flowchart of an air conditioner snow accumulation prevention method according to still another embodiment of the present invention;
FIG. 4 is a flowchart of air conditioner snow protection method steps 300 according to an embodiment of the present invention;
fig. 5 is a block diagram illustrating a structure of an air conditioner snow accumulation prevention apparatus according to an embodiment of the present invention.
Description of reference numerals:
1-an acquisition unit, 2-a judgment unit and 3-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.
The top-outlet air conditioner outdoor unit is usually installed on the top of a building or outdoors in the open air, and a large amount of snow is easily accumulated on the top of the outdoor unit and even on a fan due to snow falling after the outdoor unit stops running for a long time in winter. In case of accumulated snow, resistance during starting can be increased, poor heat exchange of an outer machine during normal operation of the air conditioner can be caused, the energy efficiency ratio of the air conditioner is reduced, and energy consumption of the air conditioner is increased in a phase-changing mode.
Once accumulated snow occurs, the wind resistance of the air conditioner external fan is increased, and the wind quantity generated by the air conditioner external fan is attenuated; when the rotating speed of the fan is a fixed value, the current of the fan and the wind resistance are in an inverse proportion relation. The larger the load, the smaller the fan current. After the air conditioner outdoor unit stops running for a long time in winter, the wind resistance of the outdoor unit fan is increased when the outdoor unit fan is started due to accumulated snow on the top, the current is reduced, and the air volume is reduced; the more and thicker the accumulated snow is, the larger the wind resistance is, the smaller the current is and the smaller the air quantity is.
The existing snow prevention method judges whether snow is generated or not through weather information, but the weather condition can only reflect the approximate condition of the snow, and the snow condition difference at different positions is large, so that the accuracy of judging the snow condition through the weather information is very low.
The embodiment of the disclosure provides an air conditioner snow accumulation prevention method, which can be executed by an air conditioner snow accumulation prevention device, and the air conditioner snow accumulation prevention device can be integrated in electronic equipment such as an air conditioner, an air conditioner and the like. Fig. 1 is a flowchart illustrating an air conditioner snow accumulation prevention method according to an embodiment of the present invention; the air conditioner snow accumulation preventing method comprises the following steps:
the outdoor temperature may be obtained by a temperature sensor disposed on the outdoor unit, or may be obtained by a temperature sensor near the outdoor unit or by a network.
the snow cover meets the snow cover risk condition, which means that the outdoor environment temperature is too low, and the snow cover cannot be melted by itself; or the outdoor ambient temperature corresponds to the temperature during snowing, possibly in snowing weather.
Optionally, when the following conditions are met, determining that the air conditioner meets the snow cover risk condition: the outdoor environment temperature is less than the accumulated snow temperature threshold.
Like this, can judge the environment that has the snow risk through snow temperature threshold value to avoid carrying out the snow detection of unnecessary, prevent to detect the normal use that disturbs the air conditioner because of the snow.
Optionally, the value range of the accumulated snow temperature threshold is 1-3 ℃.
Optionally, the snow temperature threshold is 2 ℃.
Thus, the snow accumulation temperature threshold is set, and because the ground temperature is higher than the air temperature, namely when the air temperature is 0 ℃, the ground temperature is generally near the snow accumulation temperature threshold, the snow falling risk exists at the moment; by setting the accumulated snow temperature threshold value, the judgment on the accumulated snow weather can be accurate.
Optionally, a weather threshold may be introduced on the basis of the snow temperature threshold, that is, the snow temperature threshold is networked with the outside to obtain external weather data; if snowfall weather (rain and snow, small snow, big snow and the like) exists in a period of time (the period of time is preferably within 5 days), judging whether snow risks exist or not by combining with the snow temperature threshold (for example, the snow risk exists in the snowfall weather in the previous five days and is smaller than the snow temperature threshold, or the snow risks exist if the snow weather exists in the previous five days and snow removal is not performed on the outdoor unit after snow fall and is smaller than the snow temperature threshold). Like this, introduce weather data for the judgement to the snow risk is more accurate, thereby avoids unnecessary snow to detect, prevents to detect the interference that causes normal use because of the snow.
the current of the external fan is the current of the outdoor unit fan. The acquisition may be detected directly by the detector or indirectly by other means.
Optionally, the external fan current is obtained in the step, and is obtained non-periodically or multiple times, but only once (where obtaining once means that the finally obtained external fan current is only once, and if a manner of calculating the external fan current by using multiple instantaneous values is adopted in actual obtaining, the external fan current is only calculated once, rather than only one instantaneous value is obtained).
It should be noted that, if the snow risk condition is not met, the air conditioner is controlled to start according to a preset operation mode. The preset operation mode is an operation mode after the air conditioner is powered on under the condition that snow removal does not occur, and specifically may be an operation mode before the air conditioner is turned off or a default operation mode internally set after the air conditioner leaves a factory.
the limiting current is preset in the air conditioner in advance and can be directly called when the limiting current is needed to be used.
The condition of meeting the accumulated snow means that the outdoor unit has accumulated snow, and the normal operation of the outdoor unit is influenced.
Optionally, when the following conditions are met, determining that the air conditioner meets the snow accumulation condition: the outer fan current is less than the limiting current.
Like this, can carry out accurate judgement to the snow circumstances to in time trigger the snow removing action behind the snow, clear away snow, the resistance when avoiding snow to increase the start, and outer quick-witted heat transfer is bad when avoiding snow to lead to the air conditioner normal operating.
And 500, if the snow accumulation condition is met, executing a first snow removing operation.
Therefore, through the step 100 and the step 500, the accumulated snow condition of the air conditioner outdoor unit can be judged directly through the external fan current which is high in sensitivity and directly influenced by the accumulated snow, so that the accumulated snow judgment accuracy can be improved, and snow can be removed in time after the accumulated snow. Therefore, resistance when the accumulated snow is increased to start can be avoided, poor heat exchange of the outer unit can be avoided when the accumulated snow causes normal running of the air conditioner, the energy efficiency ratio of the air conditioner is guaranteed not to be reduced due to the accumulated snow, and energy consumption of the air conditioner is not increased due to the accumulated snow.
Judging the snow accumulation condition of the outdoor unit, wherein the current of an outer fan needs to be detected, and the detection needs the outer fan to run for a certain time at a lower rotating speed; the operation of lower rotational speed can seriously influence the normal operating of air conditioner on the one hand, and on the other hand, if the number of times of detecting outer fan electric current is too much, also can make outer fan frequently change the rotational speed, shortens life easily.
Therefore, whether the risk of snow is present is judged firstly through the outdoor environment temperature, and snow detection is carried out after the risk of snow is present, so that the times of snow detection can be greatly reduced, the influence of the snow detection on the normal operation of the air conditioner is reduced, the accuracy of snow judgment can be improved, and the interference of blind snow removal on the operation of the air conditioner due to inaccurate judgment is reduced; therefore, the interference of the accumulated snow on the operation of the air conditioner is weakened from a plurality of layers, and the normal operation of the air conditioner is maintained.
If the snow accumulation condition is not met, controlling the air conditioner to start according to a preset running mode. The preset operation mode is an operation mode after the air conditioner is powered on under the condition that snow removal does not occur, and specifically may be an operation mode before the air conditioner is turned off or a default operation mode internally set after the air conditioner leaves a factory.
Optionally, the first snow removing operation is: and closing the outer fan, starting electric heating and operating for a second time.
The electric heating of the top air outlet air conditioner comprises top cover plate electric heating and chassis electric heating; the starting of the electric heating is to start the electric heating of the top cover plate and the electric heating of the chassis.
By closing the outer fan, the air flow and the heat loss caused by blowing of the outer fan can be eliminated, the electric heating effect is concentrated on removing accumulated snow, and the snow removing speed is improved.
Optionally, the value range of the second duration is 5min to 7 min. Thus, snow removal operation can be carried out sufficiently to remove most of the accumulated snow; thereby reducing the total snow removal time.
Optionally, the second time period is 7 min. Thus, snow can be rapidly removed, and the total snow removing time is reduced.
Optionally, as shown in fig. 2, the step 500, if the snow accumulation condition is satisfied, after the first snow removing operation is performed, further includes:
in this step, the manner of obtaining the external fan current is similar to that in step 300, but it should be noted that, in this step, the external fan current is obtained after the first snow removal operation is performed, that is, the electric heating is still in an on state at this time.
the snow accumulation condition is met, the outdoor unit still has snow accumulation, and the snow accumulation is not cleared up completely, so that the normal operation of the outdoor unit is influenced.
Optionally, when the following conditions are met, determining that the air conditioner meets the snow accumulation condition: the outer fan current is less than the limiting current.
Like this, can carry out accurate judgement to the snow circumstances (whether clear away and finish) to continue the snow removal action when snow is not all clear away, clear away snow completely, avoid the resistance when snow increases the start, and avoid snow to lead to the air conditioner when normally operating outer quick-witted heat transfer bad.
The limit current as the threshold value is obtained experimentally.
Optionally, the limiting current is an external fan current value when the external fan operates at the preset rotation speed and the air volume attenuation rate is a first reference value under an experimental condition that only the wind resistance is increased.
That is, in the experimental process, the external fan is operated at a preset rotating speed, the wind resistance is increased in a certain mode (for example, a plurality of gauzes sequentially cover the air outlet of the top cover plate, and the like), and the air output and the real-time external fan current are measured; when the air quantity attenuation rate reaches a first reference value, the current of the external fan at the moment is the limiting current.
It should be noted that, under the experimental conditions, the control of the attenuation rate of the air volume is not continuous control, but the attenuation rate is obtained intermittently; for example, the wind resistance is increased by sequentially covering a plurality of gauzes on the air outlet of the top cover plate, and a corresponding attenuation rate is obtained when each layer of gauze is added; after obtaining a plurality of attenuation factors, the external fan current corresponding to the attenuation factor closest to the first reference value (in the case where the attenuation factors are corresponding to both the left and right sides of the first reference value) may be used as the limiting current.
The value range of the first reference value is 35% -50%. Through the first reference value, the corresponding limit current can be obtained, so that the accuracy of the obtained limit current can be improved.
And step 800, if yes, executing a second snow removing operation.
Like this, can begin to clear away the snow after, through outer fan electric current, judge whether snow clears away and finishes to can in time reply normal operating and when the snow removing is unfinished continue to carry out the second snow removing action at the snow removing after the snow removing finishes, continuously remove the snow. Like this, can obtain accurate snow circumstances through the secondary judgement on the one hand, on the other hand can in time carry out corresponding action according to the snow circumstances, improves snow removing efficiency and reduces the time of replying normal operating.
Optionally, step 800, after executing the second snow removing operation if the first snow removing operation is satisfied, further includes:
and re-executing the step 600 to re-acquire the outer fan current.
In this step, the step 600 is executed again, so that the snow accumulation condition is judged again, and the corresponding snow removal operation or transition operation is executed after the judgment; thus, a cycle of detection, judgment and execution is formed until the accumulated snow is cleared.
Therefore, through circulation, on one hand, accumulated snow can be removed completely, so that resistance when the accumulated snow is increased and started can be avoided, poor heat exchange of an external unit when the air conditioner normally runs due to the accumulated snow can be avoided, the energy efficiency ratio of the air conditioner is not reduced due to the accumulated snow, and the energy consumption of the air conditioner is not increased due to the accumulated snow; on the other hand, through circulation, the snow removing device can stop removing actions in time after snow is removed, and interference on normal use is reduced.
Optionally, the second snow removing operation is: and keeping the electric heating and the starting state of the outer fan and operating for a third time.
Wherein the second snow removing operation is performed after the first snow removing operation, and at this time, the electric heating is still in an on state, so that it is not necessary to turn on the electric heating.
In addition, it should be noted that the purpose of the second snow removal operation is to make up for the leakage detection of the first snow removal operation, and therefore, the snow removal time is much shorter than that of the first snow removal operation; the current of the outer fan is required to be detected again after the second snow removal, so that the outer fan is not required to be turned off, and the results caused by frequent start and stop of the outer fan and frequent start and stop are avoided; in addition, frequent starting and stopping are not needed, and the current of the outer fan can be detected more quickly, so that the judging speed and timeliness are accelerated.
Optionally, the value range of the third duration is 15s to 60 s. Thus, on the one hand, the snow removal operation can be continued on the basis of the first snow removal operation; on the other hand, the normal operation of the air conditioner can be recovered in time after snow removal is finished.
Optionally, the third time period is 15 s. Therefore, the reaction speed can be increased on the basis of continuously removing snow, and the normal operation of the air conditioner can be timely recovered after snow removal is finished.
Optionally, as shown in fig. 3, the step 700, after determining whether the air conditioner meets the condition of snow cover according to the reacquired current of the external fan and a preset limit current, further includes:
and 900, if not, controlling the air conditioner to start according to a preset operation mode after executing transition operation.
The condition that the accumulated snow is not met means that the accumulated snow is completely removed, so that snow removal needs to be stopped, and the air conditioner is started according to a preset running mode when the accumulated snow is excessively removed.
The preset operation mode is an operation mode after the air conditioner is powered on under the condition that snow removal does not occur, and specifically may be an operation mode before the air conditioner is turned off or a default operation mode internally set after the air conditioner leaves a factory.
Optionally, the transition operation is: and (5) turning off the electric heating, and increasing the rotating speed of the outer fan to the default rotating speed.
The electric heating of the top air outlet air conditioner comprises top cover plate electric heating and chassis electric heating; and the electric heating is turned off, namely, the electric heating of the top cover plate and the electric heating of the chassis are turned off.
When the current is detected, the fan rotates at a preset rotating speed; the preset rotating speed is small, so that when the transition to the normal starting is needed, the rotating speed of the outer fan needs to be increased until the default rotating speed is reached.
The default rotating speed is the initial rotating speed of the outer fan under the condition that the air conditioner is normally started.
Therefore, the transition operation can enable the air conditioner to stably transition from the snow removing operation to the normal operation mode (the preset operation mode) of the air conditioner, so that the interference of the snow removing operation on the normal operation of the air conditioner is avoided, and the operation efficiency of the air conditioner is improved.
Therefore, the snow removing device can be timely converted into a preset operation mode after snow removing is finished, and the air conditioner can conveniently return to normal operation; therefore, the snow can be timely converted, the influence of snow removal on the operation of the air conditioner is reduced, and the interference to normal use is reduced.
Optionally, as shown in fig. 4, in step 300, if the snow accumulation risk condition is met, acquiring an air conditioner external fan current, including:
the preset rotating speed is preset in the air conditioner and can be directly read from the air conditioner.
In the method for obtaining the limiting current, the limiting current is an external fan current value when the external fan operates at the preset rotation speed and the air volume attenuation rate is a first reference value under an experimental condition that only the wind resistance is increased.
The preset rotating speed in the step is the operating rotating speed of the outer fan under the experimental condition; therefore, the outer fan is guaranteed to run at the same rotating speed when the current of the outer fan is measured, and the accumulated snow condition of the outdoor unit can be accurately judged according to the limiting current.
Optionally, when the number of the preset rotating speeds is multiple (each preset rotating speed corresponds to one limiting current), the outer fan may be controlled to operate at one of the preset rotating speeds (referred to as a preset rotating speed a); at this time, the limit current for determining the snow accumulation condition is a limit current corresponding to the preset rotation speed (preset rotation speed a).
The first time is set, so that the outer fan operates for a period of time at a stable rotating speed, the current of the outer fan is in a stable state, the current of the outer fan obtained through measurement is more stable and accurate, and the current accumulated snow condition can be reflected more.
Optionally, the value range of the first duration is 10s to 30 s. Therefore, on one hand, the running stability of the air conditioner under the measuring condition can be improved, on the other hand, the measuring time of the air conditioner can be shortened, and the measuring speed is improved.
Optionally, the first time period is 15 s. Therefore, the measuring time of the air conditioner can be shortened and the measuring speed can be increased while the running stability of the air conditioner under the measuring condition is improved.
In this way, through step 310 and step 320, the accurate current of the outer fan under the current condition can be obtained through stable operation for a period of time, so that the accuracy of the obtained current of the outer fan is improved, and the corresponding current snow situation is more accurate.
Optionally, in step 600, the step of reacquiring the outer fan current includes: and controlling the outer fan to operate at a preset rotating speed for a first time period, and then reading the current of the outer fan.
Thus, similar to the step 300 of obtaining the outer fan current, it should be noted that in this step, the outer fan current is obtained after the first snow removal operation is performed, that is, the electrical heating is still in the on state.
By maintaining the starting state of the electric heating, on one hand, the snow removing function can be still realized when the current of the external fan is detected, so that the snow removing efficiency is increased, and the repeated snow removing operation caused by unclean snow is prevented; on the other hand, frequent start and stop of electric heating can be avoided, and the possibility of faults is reduced.
Therefore, the accurate current of the outer fan under the current condition can be obtained through stable operation for a period of time, so that the accuracy of the obtained current of the outer fan is improved, and the corresponding current snow situation is more accurate.
The embodiment of the disclosure provides an air conditioner snow accumulation prevention device, which is used for executing the air conditioner snow accumulation prevention method, and the air conditioner snow accumulation prevention device is described in detail below.
As shown in fig. 5, the air conditioner snow accumulation prevention device includes:
the acquiring unit 1 is used for acquiring the outdoor environment temperature after the air conditioner is powered on;
a judging unit 2 for judging whether the air conditioner satisfies the snow cover risk condition according to the outdoor environment temperature;
the acquiring unit 1 is further used for acquiring the current of an air conditioner external fan if the accumulated snow risk condition is met;
the judging unit 2 is further configured to judge whether the air conditioner meets the accumulated snow condition according to the current of the external fan and a preset limit current;
a control unit 3 for executing a first snow removing operation if the snow accumulation condition is satisfied.
Therefore, the accumulated snow condition of the air conditioner outdoor unit can be judged directly through the current of the outer fan, and snow can be removed directly after accumulated snow. Therefore, resistance when the accumulated snow is increased to start can be avoided, poor heat exchange of the outer unit can be avoided when the accumulated snow causes normal running of the air conditioner, the energy efficiency ratio of the air conditioner is guaranteed not to be reduced due to the accumulated snow, and energy consumption of the air conditioner is not increased due to the accumulated snow.
Optionally, when the following conditions are met, determining that the air conditioner meets the snow cover risk condition: the outdoor environment temperature is less than the accumulated snow temperature threshold.
Optionally, the obtaining unit 1 is further configured to: controlling the outer fan to operate at a preset rotating speed for a first time; the outer fan current is read.
Optionally, the first snow removing operation is: and closing the outer fan, starting electric heating and operating for a second time.
Optionally, the obtaining unit 1 is further configured to: reacquiring the outer fan current;
optionally, the judging unit 2 is further configured to judge whether the air conditioner meets an accumulated snow condition according to the newly acquired current of the external fan and a preset limit current;
optionally, the control unit 3 is further configured to: and if so, executing second snow removing operation.
Optionally, when the following conditions are met, determining that the air conditioner meets the snow accumulation condition: the outer fan current is less than the limiting current.
Optionally, the obtaining unit 1 is further configured to: and if so, executing the second snow removing operation, and then re-executing the re-acquisition of the current of the outer fan.
Optionally, the control unit 3 is further configured to: if not, after the transitional operation is executed, the air conditioner is controlled to start according to a preset operation mode.
Optionally, the transition operation is: and (5) turning off the electric heating, and increasing the rotating speed of the outer fan to the default rotating speed.
Optionally, the obtaining unit 1 is further configured to: and controlling the outer fan to operate at a preset rotating speed for a first time period, and then reading the current of the outer fan.
Optionally, the second snow removing operation is: and keeping the electric heating and the starting state of the outer fan and operating for a third time.
The embodiment of the disclosure provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium stores a computer program, and the computer program is read by the processor and runs to realize the snow accumulation prevention method of the air conditioner.
Therefore, the accumulated snow condition of the air conditioner outdoor unit can be judged directly through the current of the outer fan, and snow can be removed directly after accumulated snow. Therefore, resistance when the accumulated snow is increased to start can be avoided, poor heat exchange of the outer unit can be avoided when the accumulated snow causes normal running of the air conditioner, the energy efficiency ratio of the air conditioner is guaranteed not to be reduced due to the accumulated snow, and energy consumption of the air conditioner is not increased due to the accumulated snow.
The embodiment of the disclosure also provides a computer-readable storage medium, which stores instructions, and when the instructions are loaded and executed by a processor, the method for preventing snow accumulation by an air conditioner can be implemented.
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 accumulated snow condition of the air conditioner outdoor unit can be judged directly through the current of the outer fan, and snow can be removed directly after accumulated snow. Therefore, resistance when the accumulated snow is increased to start can be avoided, poor heat exchange of the outer unit can be avoided when the accumulated snow causes normal running of the air conditioner, the energy efficiency ratio of the air conditioner is guaranteed not to be reduced due to the accumulated snow, and energy consumption of the air conditioner is not increased due to the accumulated snow.
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 (14)
1. An air conditioner snow accumulation prevention method is characterized by comprising the following steps:
after the air conditioner is powered on, acquiring the outdoor environment temperature;
judging whether the air conditioner meets the snow accumulation risk condition or not according to the outdoor environment temperature;
if the accumulated snow risk condition is met, acquiring the external fan current of the air conditioner;
judging whether the air conditioner meets the accumulated snow condition or not according to the current of the outer fan and a preset limit current;
and if the accumulated snow condition is met, executing a first snow removing operation.
2. The air conditioner snow accumulation preventing method of claim 1, wherein the air conditioner is determined to satisfy the snow accumulation risk condition when: the outdoor environment temperature is less than the accumulated snow temperature threshold.
3. The air conditioner snow accumulation preventing method of claim 1, wherein if the snow accumulation risk condition is met, acquiring an external fan current of an air conditioner comprises:
controlling the outer fan to operate at a preset rotating speed for a first time;
and reading the current of the outer fan.
4. The air conditioning snow accumulation prevention method as claimed in claim 1, wherein said first snow removing operation is: and closing the outer fan, starting electric heating and operating for a second time.
5. The air conditioning snow accumulation preventing method as claimed in any one of claims 1 to 4, wherein after performing a first snow removing operation if the snow accumulation condition is satisfied, further comprising:
reacquiring the outer fan current;
judging whether the air conditioner meets the accumulated snow condition or not according to the newly acquired current of the outer fan and the preset limit current;
and if so, executing second snow removing operation.
6. The air conditioner snow accumulation preventing method of claim 1, wherein the air conditioner is determined to satisfy the snow accumulation condition when: the outer fan current is less than the limiting current.
7. The air conditioning snow accumulation prevention method as claimed in claim 5, wherein after said performing the second snow removal operation if satisfied, further comprising:
re-executing the re-acquiring the outer fan current.
8. The air conditioner snow accumulation preventing method of claim 5, wherein after determining whether the air conditioner satisfies the snow accumulation condition according to the retrieved current of the external fan and a preset limit current, the method further comprises:
if not, after the transitional operation is executed, the air conditioner is controlled to start according to a preset operation mode.
9. The air conditioning snow protection method of claim 8, wherein the transition operation is: and (5) turning off the electric heating, and increasing the rotating speed of the outer fan to the default rotating speed.
10. The air conditioning snow protection method of claim 5, wherein said recapturing said outside fan current comprises: and controlling the outer fan to operate at a preset rotating speed for a first time, and then reading the current of the outer fan.
11. The air conditioning snow accumulation prevention method as claimed in claim 5, wherein said second snow removing operation is: and keeping the electric heating and the starting state of the outer fan and operating for a third time.
12. An air conditioner snow accumulation prevention device, comprising:
the acquiring unit (1) is used for acquiring the outdoor environment temperature after the air conditioner is powered on;
a judging unit (2) for judging whether the air conditioner meets the snow risk condition according to the outdoor environment temperature;
the acquiring unit (1) is also used for acquiring the current of an air conditioner external fan if the accumulated snow risk condition is met;
the judging unit (2) is also used for judging whether the air conditioner meets the accumulated snow condition or not according to the current of the outer fan and a preset limit current;
a control unit (3) for performing a first snow removal operation if the snow accumulation condition is satisfied.
13. 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 snow protection method of the air conditioner as set forth in any one of claims 1 to 11.
14. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when read and executed by a processor, implements the air conditioner snow-accumulation preventing method according to any one of claims 1 to 11.
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| CN202010288954.2A CN111425993A (en) | 2020-04-14 | 2020-04-14 | Snow accumulation preventing method and device for air conditioner and air conditioner |
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| CN202010288954.2A CN111425993A (en) | 2020-04-14 | 2020-04-14 | Snow accumulation preventing method and device for air conditioner and air conditioner |
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