CN108592299B - Defrosting control method and system - Google Patents

Defrosting control method and system Download PDF

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Publication number
CN108592299B
CN108592299B CN201810416638.1A CN201810416638A CN108592299B CN 108592299 B CN108592299 B CN 108592299B CN 201810416638 A CN201810416638 A CN 201810416638A CN 108592299 B CN108592299 B CN 108592299B
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defrosting
preset
temperature
indoor fan
heat exchanger
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CN108592299A (en
Inventor
余彬
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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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
    • F24F11/43—Defrosting; Preventing freezing of indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data

Abstract

The invention provides a defrosting control method, a defrosting control system, computer equipment and a computer readable storage medium. The defrosting control method comprises the following steps: responding to a defrosting instruction, and operating a defrosting mode; judging whether a first operation parameter of the air conditioning system meets a first preset condition or not; and when the first operation parameter meets a first preset condition, controlling the indoor fan to operate at a preset rotating speed. The indoor fan is controlled to operate according to the preset rotating speed, so that the heat exchange quantity of the evaporation side is improved, the condensing pressure of the outdoor heat exchanger is increased, the circulation quantity of the refrigerant is increased, the defrosting speed is increased, and discomfort caused by blowing cold air to a user is reduced or avoided.

Description

Defrosting control method and system
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method, a defrosting control system, computer equipment and a computer readable storage medium.
Background
When the air conditioning system operates in a heating mode, because the outdoor temperature is often low, the outdoor heat exchanger operates as an evaporator, the temperature of the outdoor heat exchanger is often lower than 0 ℃, frosting is easy to occur, and the outdoor heat exchanger can be adjusted to be a condenser by adjusting the air conditioning system to be in a refrigeration cycle state, so that the temperature of the outdoor heat exchanger is improved, and defrosting is realized. When a general air conditioning system works in defrosting, an indoor fan can keep a closed state, and the problem of comfort caused by blowing cold air is avoided. However, because the internal fan is stopped, the heat absorbed by the refrigerant at the evaporation side is limited, which causes the system pressure and the refrigerant circulation volume to be reduced, the defrosting capacity to be reduced, and the defrosting time to be prolonged.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the present invention is to propose a defrosting control method.
In a second aspect of the present invention, a defrosting control system is provided.
A third aspect of the present invention is to provide a computer device.
A fourth aspect of the present invention is to provide a computer-readable storage medium.
In view of the above, according to a first aspect of the present invention, there is provided a defrosting control method for an air conditioning system, wherein the air conditioning system includes an indoor fan, the defrosting control method including: responding to a defrosting instruction, and operating a defrosting mode; judging whether a first operation parameter of the air conditioning system meets a first preset condition or not; and when the first operation parameter meets a first preset condition, controlling the indoor fan to operate at a preset rotating speed.
The defrosting control method provided by the invention can respond to a defrosting instruction, operate a defrosting mode, adjust the outdoor heat exchanger into the condenser, represent the frosting condition of the outdoor heat exchanger by using a first operation parameter of the air conditioning system, set a threshold value, namely a first preset condition, for the first operation parameter, judge that the outdoor heat exchanger is frosted seriously when the first operation parameter of the air conditioning system meets the first preset condition, and control the indoor fan to operate according to a preset rotating speed to improve the heat exchange quantity at the evaporation side, so that the condensing pressure of the outdoor heat exchanger is increased, the circulation quantity of a refrigerant is increased to increase the defrosting speed, the exhaust return air temperature of the compressor is increased, and the safety and reliability of the system are improved. Meanwhile, the preset rotating speed is set to be lower, discomfort caused by cold air blowing can be reduced or avoided for a user, and defrosting efficiency and user experience are guaranteed.
In addition, according to the defrosting control method in the above technical solution provided by the present invention, the following additional technical features may be further provided:
in the foregoing technical solution, before determining whether the first operating parameter of the air conditioning system meets the operation of the first preset condition, the method further includes: acquiring the temperature of an outdoor heat exchanger; the operation of judging whether the first operating parameter of the air conditioning system meets the first preset condition includes: judging whether the temperature of the outdoor heat exchanger is less than or equal to a preset temperature or not; and/or acquiring the outdoor environment temperature, and judging whether the difference value between the outdoor environment temperature and the outdoor heat exchanger temperature is larger than or equal to a preset difference value.
In the technical scheme, a scheme of judging whether frosting is serious or not by combining the temperature of the outdoor heat exchanger and/or the temperature of the outdoor environment is specifically defined. When frosting, the surface of the outdoor heat exchanger is covered by frost, so that heat exchange between the outdoor heat exchanger and the outside is blocked, the heat absorption capacity is reduced, the temperature of the outdoor heat exchanger is lower, the lower the value of the outdoor heat exchanger is, the thicker the frosting is, a reasonable preset temperature is set, and whether the temperature of the outdoor heat exchanger is less than or equal to the preset temperature is detected, so that whether the frosting reaches a certain thickness can be judged. In addition, for the same outdoor heat exchanger temperature, the outdoor environment temperature is different, the corresponding frosting conditions are different, the higher the outdoor environment temperature is, the smaller the heat absorption capacity of the outdoor heat exchanger is, the thicker the frosting is, the lower the outdoor environment temperature is, the larger the heat absorption capacity of the outdoor heat exchanger is, the thinner the frosting is, and the frosting thickness can be represented by calculating the difference value between the outdoor environment temperature and the outdoor heat exchanger temperature. When the frosting thickness is judged, the temperature of the outdoor heat exchanger can be independently adopted, the difference value between the outdoor environment temperature and the temperature of the outdoor heat exchanger can also be independently adopted, and the two parameters can be simultaneously used for improving the judgment accuracy.
In any of the above technical solutions, preferably, before the step of operating the defrosting mode in response to the defrosting instruction, the method further includes: acquiring the outdoor environment temperature; judging whether the outdoor environment temperature is in a temperature range easy to frost or not; when the judgment result is yes, acquiring the temperature of the outdoor heat exchanger in real time, and calculating the difference value between the temperature of the first outdoor heat exchanger acquired when the judgment result is yes and the temperature of the second outdoor heat exchanger acquired when the defrosting instruction is received; the step of judging whether the first operation parameter of the air conditioning system meets the first preset condition comprises the following steps: and judging whether the difference value is larger than or equal to a preset difference value.
According to the technical scheme, the outdoor environment temperature is obtained, whether the outdoor environment temperature is in the frosting prone interval or not is further judged, when the judgment result is yes, namely the outdoor heat exchanger is frosted possibly, the temperature of the outdoor heat exchanger is obtained and recorded in real time. When a defrosting instruction is received, the air conditioning system operates a defrosting mode, the temperature of the outdoor heat exchanger at the moment is compared with the temperature of the outdoor heat exchanger when the frosting possibly begins to be judged, the difference value between the two temperatures is calculated, the temperature change condition of the outdoor heat exchanger after entering an easy frosting interval can be embodied, the frosting thickness of the current outdoor heat exchanger is further determined, when the temperature difference value of the first outdoor heat exchanger and the temperature difference value of the second outdoor heat exchanger is greater than a preset difference value, the current frosting condition is determined to be serious, the indoor fan is further controlled to operate according to the frosting condition, and defrosting is accelerated.
In any one of the above technical solutions, preferably, when the first operation parameter satisfies a first preset condition, before controlling the operation of the indoor fan at a preset rotation speed, the method further includes: and searching a preset rotating speed corresponding to the first operating parameter.
In the technical scheme, when the first operation parameter meets the first preset condition, the preset rotating speed corresponding to the first operation parameter is searched, the preset rotating speeds corresponding to the first operation parameters with different definitions are different, and defrosting effects and user experiences of different rotating speeds are different. Therefore, when the first operation parameter meets the first preset condition, the corresponding preset rotating speed is searched according to the first operation parameter, the experience of the user can be ensured while the defrosting speed is accelerated at different preset rotating speeds, and discomfort of the user caused by blowing cold air is reduced or avoided.
In any of the above technical solutions, preferably, after controlling the operation of the indoor fan at the preset rotation speed, the method further includes: acquiring a second operation parameter of the air conditioning system in real time; judging whether the second operation parameter meets a second preset condition or not; and when the second operation parameter meets a second preset condition, closing the indoor fan.
In the technical scheme, after the indoor fan is started to accelerate defrosting, the second operation parameter of the air conditioning system is obtained in real time, whether the second operation parameter meets the second preset condition or not is judged, and when the second operation parameter meets the second preset condition, the indoor fan is turned off, so that energy waste caused by long-term operation of the indoor fan is reduced, and discomfort of a user caused by blowing cold air is reduced or avoided.
In any of the above technical solutions, preferably, the step of acquiring the second operating parameter of the air conditioning system in real time includes: acquiring the circulating pressure of an air conditioning system in real time; the step of judging whether the second operation parameter meets a second preset condition comprises the following steps: and judging whether the circulating pressure is greater than or equal to a preset pressure.
In the technical scheme, the circulating pressure of the air conditioning system is obtained in real time, whether the circulating pressure is larger than the preset pressure or not is judged, and when the judgment result is yes, the existing refrigerant circulating quantity of the air conditioning system is enough, so that complete defrosting can be ensured, the defrosting capacity is not required to be improved by additionally operating an indoor fan, the energy waste caused by starting the indoor fan is reduced, and the discomfort of a user caused by blowing cold air is reduced or avoided.
In any of the above technical solutions, preferably, after controlling the operation of the indoor fan at the preset rotation speed, the method further includes: starting timing to obtain the running time of the indoor fan; judging whether the running time of the indoor fan is greater than or equal to a preset time; and when the running time of the indoor fan is more than or equal to the preset time, closing the indoor fan.
In this technical scheme, after the fan operation in the control room, open the timing, whether confirm through judging whether long more than or equal to of indoor fan operation closes the fan when long predetermined, long being greater than long predetermined, the control room fan is closed, avoids appearing when outdoor heat exchanger carries out the defrosting, and the indoor fan is incessantly operated, causes the waste of the energy.
In any of the above technical solutions, preferably, before the step of starting timing to obtain the operation duration of the indoor fan, the method further includes: acquiring a third operating parameter of the air conditioning system; and searching for a preset time length corresponding to the third operation parameter.
In the technical scheme, the preset time lengths corresponding to different operation parameters are different, after the parameters for controlling the indoor fan to stop operating are obtained, the corresponding preset time lengths are determined according to the parameters, and then the indoor fan is stopped at an accurate time, so that the condition that defrosting is incomplete or energy is wasted due to the fact that the indoor fan is stopped too early or too late is avoided.
According to a second aspect of the present invention, there is provided a defrosting control system for an air conditioning system including an indoor fan, the defrosting control system comprising: the defrosting unit is used for responding to a defrosting instruction and operating a defrosting mode; the first judging unit is used for judging whether a first operation parameter of the air conditioning system meets a first preset condition or not and activating the control unit when the judging result is yes; and the control unit is used for controlling the indoor fan to operate at a preset rotating speed.
The defrosting control system provided by the invention can respond to a defrosting instruction, wherein the defrosting unit operates in a defrosting mode, the outdoor heat exchanger is adjusted to be a condenser, meanwhile, the first judgment unit judges the frosting condition of the outdoor heat exchanger according to the first operation parameter of the air conditioning system, a threshold value, namely a first preset condition, is set for the first operation parameter, when the first judgment unit judges that the first operation parameter of the air conditioning system meets the first preset condition, the outdoor heat exchanger is judged to be frosted seriously, and the control unit controls the indoor fan to operate according to a preset rotating speed to improve the heat exchange quantity of an evaporation side, so that the condensing pressure of the outdoor heat exchanger is increased, the circulating quantity of a refrigerant is increased to increase the defrosting speed, the exhaust return air temperature of the compressor is improved, and the safety and reliability of the system are improved. Meanwhile, the preset rotating speed is set to be lower, discomfort caused by cold air blowing can be reduced or avoided for a user, and defrosting efficiency and user experience are guaranteed.
In addition, according to the defrosting control system in the above technical solution provided by the present invention, the following additional technical features may be further provided:
in the above technical solution, preferably, the method further includes: the first acquisition unit is used for acquiring the temperature of the outdoor heat exchanger; the first judging unit is specifically configured to: the temperature judging module is used for judging whether the temperature of the outdoor heat exchanger is less than or equal to a preset temperature or not; and/or acquiring the outdoor environment temperature, and judging whether the difference value between the outdoor environment temperature and the outdoor heat exchanger temperature is larger than or equal to a preset difference value.
In the technical scheme, a scheme of judging whether frosting is serious or not by combining the temperature of the outdoor heat exchanger and/or the temperature of the outdoor environment is specifically defined. When frosting, the surface of the outdoor heat exchanger is covered by frost, so that heat exchange between the outdoor heat exchanger and the outside is blocked, the heat absorption capacity is reduced, the temperature of the outdoor heat exchanger is lower, the lower the value of the outdoor heat exchanger is, the thicker the frosting is, a reasonable preset temperature is set, and whether the temperature of the outdoor heat exchanger is less than or equal to the preset temperature is detected, so that whether the frosting reaches a certain thickness can be judged. In addition, for the same outdoor heat exchanger temperature, the outdoor environment temperature is different, the corresponding frosting conditions are different, the higher the outdoor environment temperature is, the smaller the heat absorption capacity of the outdoor heat exchanger is, the thicker the frosting is, the lower the outdoor environment temperature is, the larger the heat absorption capacity of the outdoor heat exchanger is, the thinner the frosting is, and the frosting thickness can be represented by calculating the difference value between the outdoor environment temperature and the outdoor heat exchanger temperature. When the frosting thickness is judged, the temperature of the outdoor heat exchanger can be independently adopted, the difference value between the outdoor environment temperature and the temperature of the outdoor heat exchanger can also be independently adopted, and the two parameters can be simultaneously used for improving the judgment accuracy.
In any of the above technical solutions, preferably, the method further includes: a second acquiring unit for acquiring an outdoor ambient temperature; the second judgment unit is used for judging whether the outdoor environment temperature is in a frosting-prone temperature range or not; the second obtaining unit is further used for obtaining the temperature of the outdoor heat exchanger in real time when the judgment result of the second judging unit is yes, and calculating the difference value between the temperature of the first outdoor heat exchanger obtained when the judgment result of the second judging unit is yes and the temperature of the second outdoor heat exchanger obtained when the defrosting unit receives a defrosting instruction; the first judging unit is specifically configured to judge whether the difference is greater than or equal to a preset difference.
In the technical scheme, the second acquiring unit acquires the outdoor environment temperature, the second judging unit judges whether the outdoor environment temperature is in an interval prone to frosting, and when the judging result is yes, namely the outdoor heat exchanger is likely to frosting, the second acquiring unit starts to acquire and record the temperature of the outdoor heat exchanger in real time. When the defrosting unit receives a defrosting instruction, the air conditioning system operates a defrosting mode, the temperature of the outdoor heat exchanger at the moment is compared with the temperature of the outdoor heat exchanger when the defrosting instruction is judged to possibly start frosting, the difference value between the two temperatures is calculated, the temperature change condition of the outdoor heat exchanger after entering an easy frosting interval can be embodied, the frosting thickness of the current outdoor heat exchanger is further determined, when the temperature difference value of the first outdoor heat exchanger and the temperature difference value of the second outdoor heat exchanger is greater than a preset difference value, the current frosting condition is determined to be serious, the indoor fan is further controlled to operate according to the frosting condition, and defrosting is accelerated.
In any of the above technical solutions, preferably, the control unit is further configured to, when the determination result of the first determining unit is yes, first search for a preset rotation speed corresponding to the first operation parameter, and then control the indoor fan to operate at the preset rotation speed.
In the technical scheme, when the first operation parameter meets the first preset condition, the preset rotating speed corresponding to the first operation parameter is searched, the preset rotating speeds corresponding to the first operation parameters with different definitions are different, and defrosting effects and user experiences of different rotating speeds are different. Therefore, when the first operation parameter meets the first preset condition, the control unit searches for the corresponding preset rotating speed according to the first operation parameter, the different preset rotating speeds can guarantee the experience of the user while the defrosting speed is accelerated, and discomfort caused by cold air blowing of the user is reduced or avoided.
In any of the above technical solutions, preferably, the method further includes: the third acquisition unit is used for acquiring a second operation parameter of the air conditioning system in real time; the third judging unit is used for judging whether the second operation parameter meets a second preset condition or not; the control unit is also used for closing the indoor fan when the judgment result of the third judgment unit is yes.
In the technical scheme, after the indoor fan is started to defrost in an accelerating mode, the third acquisition unit acquires second operation parameters of the air conditioning system in real time, the third judgment unit judges whether the second operation parameters meet second preset conditions or not, and when the second operation parameters meet the second preset conditions, the control unit closes the indoor fan, so that energy waste caused by long-term operation of the indoor fan is reduced, and discomfort caused by blowing cold air for a user is reduced or avoided.
In any of the above technical solutions, preferably, the third obtaining unit is specifically configured to obtain the circulating pressure of the air conditioning system in real time; the third judging unit is specifically configured to judge whether the circulation pressure is greater than or equal to a preset pressure.
In the technical scheme, the third acquisition unit acquires the circulating pressure of the air conditioning system in real time, the third judgment unit judges whether the circulating pressure is greater than the preset pressure, and when the judgment result is yes, namely the circulating quantity of the existing refrigerant of the air conditioning system is enough, the defrosting can be ensured to be complete, the defrosting capacity is not required to be improved by additionally operating an indoor fan, so that the energy waste caused by starting the indoor fan is reduced, and the discomfort of a user caused by blowing cold air is reduced or avoided.
In any of the above technical solutions, preferably, the method further includes: the timing unit is used for starting timing after the control unit controls the indoor fan to operate at a preset rotating speed so as to obtain the operation duration of the indoor fan; the fourth judging unit is used for judging whether the running time of the indoor fan is greater than or equal to the preset time; the control unit is also used for closing the indoor fan when the judgment result of the fourth judgment unit is yes.
In the technical scheme, after the control unit controls the indoor fan to operate, the timing is started, whether the fan is closed or not is determined by judging whether the operating time of the indoor fan is longer than or equal to the preset time, the indoor fan is controlled to be closed only when the operating time is longer than the preset time, and the phenomenon that when the outdoor heat exchanger is defrosted, the indoor fan is not stopped, so that energy waste is caused is avoided. Meanwhile, the given preset time can also ensure that the defrosting of the outdoor heat exchanger is finished.
In any of the above technical solutions, preferably, the method further includes: the fourth acquisition unit is used for acquiring a third operating parameter of the air conditioning system; and the searching unit is used for searching the preset time length corresponding to the third operation parameter.
In the technical scheme, the preset durations corresponding to different operation parameters are different, and after the fourth acquisition unit acquires the third operation parameter for controlling the indoor fan to stop operating, the search unit determines the corresponding preset duration according to the parameter, so as to determine an accurate time to stop the indoor fan, thereby avoiding the occurrence of incomplete defrosting or energy waste caused by too-early or too-late stop of the indoor fan.
According to a third aspect of the present invention, there is provided a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method according to any of the above-mentioned aspects when executing the computer program.
In the computer device provided by the present invention, when the processor executes the computer program stored in the memory, the steps of the method according to any one of the above technical solutions can be implemented, so that all the beneficial technical effects of the defrosting control method are achieved, and no further description is provided herein.
According to a fourth aspect of the present invention, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method according to any one of the preceding claims.
In the computer-readable storage medium provided by the present invention, when being executed by a processor, the computer program stored thereon can implement the steps of the method according to any of the above technical solutions, so that the method has all the beneficial technical effects of the above defrosting control method, and details are not repeated herein.
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 shows a schematic flowchart of a defrosting control method according to a first embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram illustrating a defrosting control method according to a second embodiment of the present invention;
FIG. 3 is a schematic flow chart diagram illustrating a defrosting control method according to a third embodiment of the present invention;
FIG. 4 is a schematic flow chart diagram illustrating a defrosting control method according to a fourth embodiment of the present invention;
fig. 5 is a schematic flowchart illustrating a defrosting control method according to a fifth embodiment of the present invention;
FIG. 6 is a schematic flow chart diagram illustrating a defrosting control method according to a sixth embodiment of the present invention;
FIG. 7 is a schematic flowchart illustrating a defrosting control method according to a seventh embodiment of the present invention;
fig. 8 is a schematic flowchart illustrating a defrosting control method according to an eighth embodiment of the present invention;
fig. 9 is a schematic flowchart illustrating a defrosting control method according to a ninth embodiment of the present invention;
FIG. 10 shows a schematic block diagram of a defrosting control system according to a first embodiment of the present invention;
FIG. 11 is a schematic block diagram of a defrosting control system according to a second embodiment of the present invention;
FIG. 12 is a schematic block diagram illustrating a defrosting control system according to a third embodiment of the present invention;
FIG. 13 is a schematic block diagram illustrating a defrosting control system according to a fourth embodiment of the present invention;
fig. 14 shows a schematic block diagram of a defrosting control system according to a fifth embodiment of the present invention;
FIG. 15 shows a schematic block diagram of a defrosting control system according to a sixth embodiment of the present invention;
FIG. 16 shows a schematic structural diagram of a computer device according to an embodiment of the invention;
fig. 17 shows a schematic diagram of dividing the outdoor environment temperature into a frost-prone interval and a frost-unlikely interval.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Embodiments of a first aspect of the present invention provide a defrosting control method for an air conditioning system, wherein the air conditioning system includes an indoor fan.
Fig. 1 shows a schematic flowchart of a defrosting control method according to a first embodiment of the present invention.
As shown in fig. 1, a defrosting control method according to a first embodiment of the present invention includes:
s102, responding to a defrosting instruction, and operating a defrosting mode;
s104, judging whether a first operation parameter of the air conditioning system meets a first preset condition or not;
and S106, controlling the indoor fan to operate at a preset rotating speed when the first operation parameter meets a first preset condition.
The defrosting control method provided by the embodiment of the invention can respond to a defrosting instruction, operate a defrosting mode, adjust the outdoor heat exchanger into the condenser, represent the frosting condition of the outdoor heat exchanger by using the first operating parameter of the air conditioning system, set a threshold value, namely a first preset condition, for the first operating parameter, judge that the outdoor heat exchanger is frosted seriously when the first operating parameter of the air conditioning system meets the first preset condition, and control the indoor fan to operate according to a preset rotating speed to improve the heat exchange quantity at the evaporation side, so that the condensing pressure of the outdoor heat exchanger is increased, the circulation quantity of a refrigerant is increased to increase the defrosting speed, the exhaust return air temperature of the compressor is increased, and the safety and reliability of the system are improved. Meanwhile, the preset rotating speed is set to be lower, discomfort caused by cold air blowing can be reduced or avoided for a user, and defrosting efficiency and user experience are guaranteed. Specifically, if the fan in the defrosting front chamber is running, the fan in the control chamber is not directly stopped but is reduced to a preset rotation speed.
The air conditioning system can detect a first operation parameter in real time, generate a defrosting instruction to operate a defrosting mode when the defrosting condition is met, and judge whether the first operation parameter meets a first preset condition; the air conditioning system can also receive a defrosting instruction input by a user through an operation panel, a remote controller or an application program, and the like, obtain a first operation parameter and judge whether a first preset condition is met after the defrosting instruction is received, at the moment, the defrosting mode can be operated firstly and then the judgment is carried out, the judgment can also be carried out firstly to determine whether an indoor fan is operated, the defrosting mode is operated after the judgment, and the defrosting mode is started and the indoor fan is operated at a preset rotating speed simultaneously.
For a common split air conditioning system, the inner fan stops, but because the temperature of the indoor side is high, and the pipe has a certain length, a large amount of heat can be absorbed, and meanwhile, the comfort is still required to be considered in most occasions, so that cold air blowing is avoided, and the inner fan is closed. However, in some air conditioning systems with relatively special structures and use conditions, such as an integral heat pump with a relatively long inner air pipe and a relatively large air volume, when defrosting, because the amount of heat absorbed by closing an indoor fan and an indoor heat exchanger is very limited, the defrosting time is very long, and defrosting is not clean under special conditions, at the moment, when defrosting, the indoor fan is started for a short time to help to absorb heat, so that defrosting can be accelerated; for another example, for some integral air conditioning units in large-scale commercial occasions, because the whole unit is located at the outdoor side, and the ambient temperature is relatively low, and there is no piping, when defrosting, the heat absorbed by the refrigerant at the evaporation side is very small, the system pressure is very low, the circulation amount is also very low, the defrosting capacity is very small, when frosting is relatively more, the defrosting period is very long, and there is a possibility that defrosting is not clean. Meanwhile, similar units have no strict requirement on short-time cold air blowing of the system, so the defrosting control method provided by the invention is particularly suitable for the units.
The control scheme provided by the invention is suitable for all heat pump systems, and the control of the indoor fan operation requirement is within the protection scope of the invention when the heat pump defrosting is carried out.
Fig. 2 is a schematic flowchart illustrating a defrosting control method according to a second embodiment of the present invention.
As shown in fig. 2, a defrosting control method according to a second embodiment of the present invention includes:
s202, responding to a defrosting instruction, and operating a defrosting mode;
s204, acquiring the temperature of the outdoor heat exchanger and the outdoor environment temperature;
s206, judging whether the temperature of the outdoor heat exchanger is less than or equal to a preset temperature, and judging whether the difference value between the outdoor environment temperature and the temperature of the outdoor heat exchanger is greater than or equal to a preset difference value;
and S208, controlling the indoor fan to operate at a preset rotating speed when the temperature of the outdoor heat exchanger is less than or equal to a preset temperature and the difference between the outdoor environment temperature and the temperature of the outdoor heat exchanger is greater than or equal to a preset difference.
In this embodiment, a scheme for judging whether the frosting is serious or not by combining the temperature of the outdoor heat exchanger and/or the temperature of the outdoor environment is specifically defined. When frosting, the surface of the outdoor heat exchanger is covered by frost, so that heat exchange between the outdoor heat exchanger and the outside is blocked, the heat absorption capacity is reduced, the temperature of the outdoor heat exchanger is lower, the lower the value of the outdoor heat exchanger is, the thicker the frosting is, a reasonable preset temperature is set, and whether the temperature of the outdoor heat exchanger is less than or equal to the preset temperature is detected, so that whether the frosting reaches a certain thickness can be judged. In addition, for the same outdoor heat exchanger temperature, the outdoor environment temperature is different, the corresponding frosting conditions are different, the higher the outdoor environment temperature is, the smaller the heat absorption capacity of the outdoor heat exchanger is, the thicker the frosting is, the lower the outdoor environment temperature is, the larger the heat absorption capacity of the outdoor heat exchanger is, the thinner the frosting is, and the frosting thickness can be represented by calculating the difference value between the outdoor environment temperature and the outdoor heat exchanger temperature. When the frosting thickness is judged, the two parameters can be used simultaneously as in the embodiment, and one parameter can also be independently adopted for judgment.
Fig. 3 is a schematic flowchart illustrating a defrosting control method according to a third embodiment of the present invention.
As shown in fig. 3, a defrosting control method according to a third embodiment of the present invention includes:
s302, acquiring outdoor environment temperature;
s304, judging whether the outdoor environment temperature is in a frosting-prone temperature range or not;
s306, acquiring the temperature of the outdoor heat exchanger in real time when the judgment result is yes, and calculating the difference value between the temperature of the first outdoor heat exchanger acquired when the judgment result is yes and the temperature of the second outdoor heat exchanger acquired when the defrosting instruction is received;
s308, responding to a defrosting instruction, and operating a defrosting mode;
s310, judging whether the difference value is larger than or equal to a preset difference value or not;
and S312, when the difference value is larger than or equal to the preset difference value, controlling the indoor fan to operate at the preset rotating speed.
In the embodiment, the outdoor environment temperature is obtained, whether the outdoor environment temperature is in the frosting prone interval is further judged, if yes, the outdoor heat exchanger is frosted possibly, and the temperature of the outdoor heat exchanger is obtained and recorded in real time. When a defrosting instruction is received, the air conditioning system operates a defrosting mode, the temperature of the outdoor heat exchanger at the moment is compared with the temperature of the outdoor heat exchanger when the frosting possibly begins to be judged, the difference value between the two temperatures is calculated, the temperature change condition of the outdoor heat exchanger after entering an easy frosting interval can be embodied, the frosting thickness of the current outdoor heat exchanger is further determined, when the temperature difference value of the first outdoor heat exchanger and the temperature difference value of the second outdoor heat exchanger is greater than a preset difference value, the current frosting condition is determined to be serious, the indoor fan is further controlled to operate according to the frosting condition, and defrosting is accelerated.
Fig. 4 shows a schematic flowchart of a defrosting control method according to a fourth embodiment of the present invention.
As shown in fig. 4, a defrosting control method of a fourth embodiment of the present invention includes:
s402, responding to a defrosting instruction, and operating a defrosting mode;
s404, judging whether a first operation parameter of the air conditioning system meets a first preset condition;
s406, when the first operation parameter meets a first preset condition, searching a preset rotating speed corresponding to the first operation parameter, and controlling the indoor fan to operate at the preset rotating speed.
In this embodiment, when the first operating parameter meets the first preset condition, the preset rotating speed corresponding to the first operating parameter is searched, the preset rotating speeds corresponding to the first operating parameters defined differently are also different, and the defrosting effect and the user experience that are played at different rotating speeds are different. Therefore, when the first operation parameter meets the first preset condition, the corresponding preset rotating speed is searched according to the first operation parameter, the experience of the user can be ensured while the defrosting speed is accelerated at different preset rotating speeds, and discomfort of the user caused by blowing cold air is reduced or avoided.
Fig. 5 is a schematic flowchart illustrating a defrosting control method according to a fifth embodiment of the present invention.
As shown in fig. 5, a defrosting control method of a fifth embodiment of the present invention includes:
s502, responding to a defrosting instruction, and operating a defrosting mode;
s504, judging whether a first operation parameter of the air conditioning system meets a first preset condition;
s506, when the first operation parameter meets a first preset condition, controlling the indoor fan to operate at a preset rotating speed;
s508, acquiring a second operation parameter of the air conditioning system in real time;
s510, judging whether the second operation parameter meets a second preset condition;
and S512, when the second operation parameter meets a second preset condition, closing the indoor fan.
In the embodiment, after the indoor fan is turned on to accelerate defrosting, the second operation parameter of the air conditioning system is obtained in real time, whether the second operation parameter meets the second preset condition is judged, and when the second operation parameter meets the second preset condition, the indoor fan is turned off, so that energy waste caused by long-term operation of the indoor fan is reduced, and discomfort of a user due to cold air blowing is reduced or avoided. Alternatively, the second operating parameter may be an outdoor heat exchanger temperature or an indoor heat exchanger temperature, or may be another parameter that may indicate sufficient defrosting capacity.
Fig. 6 is a schematic flowchart illustrating a defrosting control method according to a sixth embodiment of the present invention.
As shown in fig. 6, a defrosting control method of a sixth embodiment of the present invention includes:
s602, responding to a defrosting instruction, and operating a defrosting mode;
s604, judging whether a first operation parameter of the air conditioning system meets a first preset condition;
s606, controlling the indoor fan to operate at a preset rotating speed when the first operating parameter meets a first preset condition;
s608, acquiring the circulating pressure of the air conditioning system in real time;
s610, judging whether the circulating pressure is greater than or equal to a preset pressure or not;
and S612, when the circulating pressure is judged to be greater than or equal to the preset pressure, closing the indoor fan.
In the embodiment, the circulating pressure of the air conditioning system is obtained in real time, whether the circulating pressure is larger than the preset pressure is judged, and if the judgment result is yes, namely the existing refrigerant circulating quantity of the air conditioning system is enough, the defrosting can be ensured to be complete, the defrosting capacity is not required to be improved by additionally operating the indoor fan, so that the energy waste caused by starting the indoor fan is reduced, and the discomfort of a user caused by blowing cold air is reduced or avoided.
Fig. 7 is a schematic flowchart illustrating a defrosting control method according to a seventh embodiment of the present invention.
As shown in fig. 7, a defrosting control method of a seventh embodiment of the present invention includes:
s702, responding to a defrosting instruction, and operating a defrosting mode;
s704, judging whether a first operation parameter of the air conditioning system meets a first preset condition;
s706, controlling the indoor fan to operate at a preset rotating speed when the first operation parameter meets a first preset condition;
s708, timing is started to obtain the running time of the indoor fan;
s710, judging whether the running time of the indoor fan is longer than or equal to a preset time;
and S712, when the running time of the indoor fan is longer than or equal to the preset time, closing the indoor fan.
In this embodiment, after controlling the operation of the indoor fan, the timing is started, whether the indoor fan is turned off is determined by judging whether the operation duration of the indoor fan is greater than or equal to the preset duration, and when the operation duration is greater than the preset duration, the indoor fan is controlled to be turned off, so that the situation that the indoor fan is not turned on when the outdoor heat exchanger is defrosted is avoided, and the energy waste is caused.
Fig. 8 is a schematic flowchart illustrating a defrosting control method according to an eighth embodiment of the present invention.
As shown in fig. 8, a defrosting control method of an eighth embodiment of the present invention includes:
s802, responding to a defrosting instruction, and operating a defrosting mode;
s804, judging whether a first operation parameter of the air conditioning system meets a first preset condition or not;
s806, controlling the indoor fan to operate at a preset rotating speed when the first operating parameter meets a first preset condition;
s808, timing is started to obtain the running time of the indoor fan;
s810, acquiring the circulating pressure of the air conditioning system in real time;
s812, judging whether the circulating pressure is greater than or equal to a preset pressure, if so, turning to S816, and if not, turning to S814;
s814, judging whether the running time of the indoor fan is greater than or equal to the preset time, if so, turning to S816, and if not, returning to S810;
and S816, closing the indoor fan.
In this embodiment, the indoor fan operation duration is combined with the circulation pressure, if the circulation pressure rises to the preset pressure, the indoor unit is turned off, and if the circulation pressure does not rise to the preset pressure, the indoor fan operation duration reaches the preset duration, the indoor fan is still selected to be turned off, and the defrosting mode continues. In contrast, in the sixth embodiment of the present invention, since the operating time of the indoor fan is not recorded, the indoor fan can be always operated when the circulation pressure is insufficient, and the time is not limited.
Fig. 9 shows a schematic flowchart of a defrosting control method according to a ninth embodiment of the present invention.
As shown in fig. 9, a defrosting control method of a ninth embodiment of the present invention includes:
s902, responding to a defrosting instruction, and operating a defrosting mode;
s904, judging whether a first operation parameter of the air conditioning system meets a first preset condition;
s906, controlling the indoor fan to operate at a preset rotating speed when the first operating parameter meets a first preset condition;
s908, acquiring a third operating parameter of the air conditioning system;
s910, searching for a preset time length corresponding to the third operation parameter;
s912, timing is started to obtain the running time of the indoor fan;
s914, acquiring the circulating pressure of the air conditioning system in real time;
s916, judging whether the circulating pressure is larger than or equal to a preset pressure, if so, turning to S920, and if not, turning to S918;
s918, judging whether the running time of the indoor fan is greater than or equal to the preset time, if so, turning to S920, and if not, returning to S914;
and S920, closing the indoor fan.
In the embodiment, the preset durations corresponding to different operation parameters are different, and after the parameters for controlling the indoor fan to stop operating are obtained, the corresponding preset durations are determined according to the parameters, so that the indoor fan is stopped at an accurate time, and the condition that defrosting is incomplete or energy is wasted due to the fact that the indoor fan is stopped too early or too late is avoided.
Embodiments of a second aspect of the present invention provide a defrost control system for an air conditioning system, wherein the air conditioning system includes an indoor fan.
Fig. 10 shows a schematic block diagram of a defrosting control system 100 according to a first embodiment of the present invention.
As shown in fig. 10, a defrosting control system 100 according to a first embodiment of the present invention includes:
the defrosting unit 102 is used for responding to a defrosting instruction and operating a defrosting mode;
the first judging unit 104 is used for judging whether a first operating parameter of the air conditioning system meets a first preset condition or not, and activating the control unit when the judging result is yes;
and the control unit 106 is used for controlling the indoor fan to operate at a preset rotating speed.
The defrosting control system provided by the invention can respond to a defrosting instruction, wherein the defrosting unit 102 operates a defrosting mode to adjust the outdoor heat exchanger into a condenser, meanwhile, the first judging unit 104 represents the frosting condition of the outdoor heat exchanger according to the first operating parameter of the air conditioning system, a threshold value, namely a first preset condition, is set for the first operating parameter, when the first judging unit 104 judges that the first operating parameter of the air conditioning system meets the first preset condition, the frosting of the outdoor heat exchanger is judged to be serious, and the control unit 106 controls the indoor fan to operate according to a preset rotating speed to improve the heat exchange quantity at the evaporation side, so that the condensing pressure of the outdoor heat exchanger is increased, the refrigerant circulating quantity is increased to increase the defrosting speed, the exhaust return air temperature of the compressor is increased, and the safety and reliability of the system are improved. Meanwhile, the preset rotating speed is set to be lower, discomfort caused by cold air blowing can be reduced or avoided for a user, and defrosting efficiency and user experience are guaranteed. Specifically, if the defrosting front indoor fan is running, the control unit 106 controls the indoor fan not to be directly stopped but to reduce the rotation speed to a preset rotation speed.
The air conditioning system can detect a first operation parameter in real time, generate a defrosting instruction to operate a defrosting mode when a defrosting condition is met, and meanwhile the first judging unit 104 can judge whether the first operation parameter meets a first preset condition; the air conditioning system may also receive a defrosting instruction input by a user through an operation panel, a remote controller, an application program, or the like, obtain a first operation parameter after receiving the defrosting instruction, and determine whether a first preset condition is met by the first determination unit 104, at this time, the first determination unit 104 may be operated by the operable defrosting unit 102, or the first determination unit 104 may be operated first to determine whether to operate the indoor fan, and then the defrosting unit 102 may be operated, and the defrosting unit 102 controls the air conditioning system to enter a defrosting mode and the control unit 106 to operate the indoor fan at a preset rotation speed simultaneously.
For a common split air conditioning system, the inner fan stops, but because the temperature of the indoor side is high, and the pipe has a certain length, a large amount of heat can be absorbed, and meanwhile, the comfort is still required to be considered in most occasions, so that cold air blowing is avoided, and the inner fan is closed. However, in some air conditioning systems with relatively special structures and use conditions, such as an integral heat pump with a relatively long inner air pipe and a relatively large air volume, when defrosting, because the amount of heat absorbed by closing an indoor fan and an indoor heat exchanger is very limited, the defrosting time is very long, and defrosting is not clean under special conditions, at the moment, when defrosting, the indoor fan is started for a short time to help to absorb heat, so that defrosting can be accelerated; for another example, for some integral air conditioning units in large-scale commercial occasions, because the whole unit is located at the outdoor side, and the ambient temperature is relatively low, and there is no piping, when defrosting, the heat absorbed by the refrigerant at the evaporation side is very small, the system pressure is very low, the circulation amount is also very low, the defrosting capacity is very small, when frosting is relatively more, the defrosting period is very long, and there is a possibility that defrosting is not clean. Meanwhile, because similar units have no strict requirement on the short-term cold air blowing of the system, the defrosting control system provided by the invention is particularly suitable for the units.
The control scheme provided by the invention is suitable for all heat pump systems, and the control of the indoor fan operation requirement is within the protection scope of the invention when the heat pump defrosting is carried out.
Fig. 11 shows a schematic block diagram of a defrosting control system 200 according to a second embodiment of the present invention.
As shown in fig. 11, a defrosting control system 200 according to a second embodiment of the present invention includes:
a defrosting unit 202, configured to operate a defrosting mode in response to a defrosting instruction;
a first obtaining unit 204, configured to obtain an outdoor heat exchanger temperature;
a first judging unit 206, configured to judge whether the temperature of the outdoor heat exchanger is less than or equal to a preset temperature, and activate the control unit 208 if the judgment result is yes;
and the control unit 208 is used for controlling the indoor fan to operate at a preset rotating speed.
In addition, the first obtaining unit 204 may further be configured to obtain an outdoor environment temperature, and accordingly, the first determining unit 206 may be configured to determine whether a difference between the outdoor environment temperature and the outdoor heat exchanger temperature is greater than or equal to a preset difference, or whether the outdoor heat exchanger temperature is less than or equal to the preset temperature and the difference between the outdoor environment temperature and the outdoor heat exchanger temperature is greater than or equal to the preset difference at the same time.
In this embodiment, a scheme is specifically defined in which the first determination unit 206 determines whether the frosting is serious in combination with the outdoor heat exchanger temperature and/or the outdoor environment temperature acquired by the first acquisition unit 204. When frosting, the surface of the outdoor heat exchanger is covered by frost, so that heat exchange between the outdoor heat exchanger and the outside is blocked, the heat absorption capacity is reduced, the temperature of the outdoor heat exchanger is lower, the lower the value of the outdoor heat exchanger is, the thicker the frosting is, a reasonable preset temperature is set, and whether the temperature of the outdoor heat exchanger is less than or equal to the preset temperature is detected, so that whether the frosting reaches a certain thickness can be judged. In addition, for the same outdoor heat exchanger temperature, the outdoor environment temperature is different, the corresponding frosting conditions are different, the higher the outdoor environment temperature is, the smaller the heat absorption capacity of the outdoor heat exchanger is, the thicker the frosting is, the lower the outdoor environment temperature is, the larger the heat absorption capacity of the outdoor heat exchanger is, the thinner the frosting is, and the frosting thickness can be represented by calculating the difference value between the outdoor environment temperature and the outdoor heat exchanger temperature. When the first determining unit 206 determines the frosting thickness, the two parameters may be used simultaneously, or one parameter may be used alone for determination.
Fig. 12 shows a schematic block diagram of a defrosting control system 300 according to a third embodiment of the present invention.
As shown in fig. 12, a defrosting control system 300 according to a third embodiment of the present invention includes:
a defrosting unit 302, configured to operate a defrosting mode in response to a defrosting instruction;
a second obtaining unit 304, configured to obtain an outdoor ambient temperature;
a second determining unit 306, configured to determine whether the outdoor environment temperature is in a frosting prone temperature range;
the second obtaining unit 304 is further configured to obtain the temperature of the outdoor heat exchanger in real time when the determination result of the second determining unit 306 is yes, and calculate a difference between the temperature of the first outdoor heat exchanger obtained when the determination result of the second determining unit 306 is yes and the temperature of the second outdoor heat exchanger obtained when the defrosting unit 302 receives the defrosting instruction;
a first judging unit 308, configured to judge whether the difference is greater than or equal to a preset difference, and activate the control unit 310 if the judgment result is yes;
and a control unit 310 for controlling the indoor fan to operate at a preset rotation speed.
In this embodiment, the second obtaining unit 304 obtains the outdoor environment temperature, and then the second determining unit 306 determines whether the outdoor environment temperature is in the frost-prone interval, and when the determination result is yes, that is, the outdoor heat exchanger may frost, the second obtaining unit 304 starts to obtain and record the outdoor heat exchanger temperature in real time. When the defrosting unit 302 receives a defrosting instruction, the air conditioning system operates a defrosting mode, compares the temperature of the outdoor heat exchanger at the moment with the temperature of the outdoor heat exchanger when the defrosting instruction is judged to possibly start frosting, calculates the difference value between the two temperatures, and can reflect the temperature change condition of the outdoor heat exchanger after entering an easily frosted interval, so as to determine the frosting thickness of the current outdoor heat exchanger, and when the temperature difference value between the first outdoor heat exchanger and the second outdoor heat exchanger is greater than a preset difference value, the current frosting condition is determined to be serious, so that an indoor fan is controlled to operate according to the frosting condition, and defrosting is accelerated.
In an embodiment of the invention, preferably, the control unit is further configured to, when the determination result of the first determining unit is yes, first search for a preset rotation speed corresponding to the first operation parameter, and then control the indoor fan to operate at the preset rotation speed.
In this embodiment, when the first operating parameter meets the first preset condition, the preset rotating speed corresponding to the first operating parameter is searched, the preset rotating speeds corresponding to the first operating parameters defined differently are also different, and the defrosting effect and the user experience that are played at different rotating speeds are different. Therefore, when the first operation parameter meets the first preset condition, the control unit searches for the corresponding preset rotating speed according to the first operation parameter, the different preset rotating speeds can guarantee the experience of the user while the defrosting speed is accelerated, and discomfort caused by cold air blowing of the user is reduced or avoided.
Fig. 13 illustrates a schematic block diagram of a defrosting control system 400 according to a fourth embodiment of the present invention.
As shown in fig. 13, a defrosting control system 400 according to a fourth embodiment of the present invention includes:
a defrosting unit 402, configured to operate a defrosting mode in response to a defrosting instruction;
a second obtaining unit 404, configured to obtain an outdoor ambient temperature;
a second determining unit 406, configured to determine whether the outdoor environment temperature is in a frosting prone temperature range;
the second obtaining unit 404 is further configured to obtain the temperature of the outdoor heat exchanger in real time when the determination result of the second determining unit 406 is yes, and calculate a difference between the first temperature of the outdoor heat exchanger obtained when the determination result of the second determining unit 406 is yes and the second temperature of the outdoor heat exchanger obtained when the defrosting unit 402 receives the defrosting instruction;
a first judging unit 408, configured to judge whether the difference is greater than or equal to a preset difference, and activate the control unit 410 if the judgment result is yes;
a control unit 410 for controlling the indoor fan to operate at a preset rotation speed;
a third obtaining unit 412, configured to obtain a second operation parameter of the air conditioning system in real time;
a third determining unit 414, configured to determine whether the second operating parameter meets a second preset condition;
the control unit 410 is further configured to turn off the indoor fan when the determination result of the third determining unit 414 is yes.
In this embodiment, after the indoor fan is turned on to accelerate defrosting, the third obtaining unit 412 obtains a second operating parameter of the air conditioning system in real time, the third determining unit 414 determines whether the second operating parameter meets a second preset condition, and when the second operating parameter meets the second preset condition, the control unit 410 turns off the indoor fan, so as to reduce energy waste caused by long-term operation of the indoor fan, and reduce or avoid discomfort caused by blowing cold air for a user. Alternatively, the second operating parameter may be an outdoor heat exchanger temperature or an indoor heat exchanger temperature, or may be another parameter that may indicate sufficient defrosting capacity.
In an embodiment of the present invention, preferably, as shown in fig. 13, the third obtaining unit 412 is specifically configured to obtain the circulation pressure of the air conditioning system in real time; the third determining unit 414 is specifically configured to determine whether the circulation pressure is greater than or equal to a preset pressure.
In this embodiment, the third obtaining unit 412 obtains the circulation pressure of the air conditioning system in real time, and the third determining unit 414 determines whether the circulation pressure is greater than a preset pressure, and if so, that is, the existing refrigerant circulation volume of the air conditioning system is sufficient, it can be ensured that defrosting is complete, and it is not necessary to additionally operate the indoor fan to improve defrosting capacity, so that energy waste caused by turning on the indoor fan is reduced, and discomfort caused by blowing cold air to a user is reduced or avoided.
Fig. 14 shows a schematic block diagram of a defrosting control system 500 according to a fifth embodiment of the present invention.
As shown in fig. 14, a defrosting control system 500 according to a fifth embodiment of the present invention includes:
a defrosting unit 502 for operating a defrosting mode in response to a defrosting instruction;
a second obtaining unit 504 for obtaining an outdoor ambient temperature;
a second determining unit 506, configured to determine whether the outdoor environment temperature is in a frosting prone temperature range;
the second obtaining unit 504 is further configured to obtain the temperature of the outdoor heat exchanger in real time when the determination result of the second determining unit 506 is yes, and calculate a difference between the temperature of the first outdoor heat exchanger obtained when the determination result of the second determining unit 506 is yes and the temperature of the second outdoor heat exchanger obtained when the defrosting unit 502 receives the defrosting instruction;
a first judging unit 508, configured to judge whether the difference is greater than or equal to a preset difference, and activate the control unit 510 if the judgment result is yes;
a control unit 510 for controlling the indoor fan to operate at a preset rotation speed;
the timing unit 512 is configured to start timing after the control unit 510 controls the indoor fan to operate at a preset rotation speed, so as to obtain an operation duration of the indoor fan;
a fourth judging unit 514, configured to judge whether the indoor fan operation duration is greater than or equal to a preset duration;
the control unit 510 is further configured to turn off the indoor fan when the judgment result of the fourth judgment unit 514 is yes.
In this embodiment, after the control unit 510 controls the operation of the indoor fan, the timing unit 512 starts timing, and determines whether to turn off the indoor fan by determining whether the operation duration of the indoor fan is greater than or equal to the preset duration through the fourth determining unit 514, and when the operation duration is greater than the preset duration, the control unit 510 controls the indoor fan to turn off, so as to avoid energy waste caused by the fact that the indoor fan does not operate continuously when the outdoor heat exchanger performs defrosting.
In addition, the timing unit 512 and the fourth judging unit 514 may be combined with the third obtaining unit 412 and the third judging unit 414 in the fourth embodiment of the present invention, if the third judging unit 414 judges that the circulation pressure obtained by the third obtaining unit 412 is increased to the preset pressure, the control unit turns off the indoor unit, if the third judging unit 414 judges that the circulation pressure obtained by the third obtaining unit 412 is not increased to the preset pressure, the fourth judging unit 514 judges that the indoor fan operation duration recorded by the timing unit 512 has reached the preset duration, the control unit still turns off the indoor fan, and the defrosting mode continues. In contrast, in the fourth embodiment of the present invention, since the operation time of the indoor fan is not recorded, the indoor fan can be always operated when the circulation pressure is insufficient, and the fourth embodiment of the present invention is not limited by time.
Fig. 15 shows a schematic block diagram of a defrosting control system 600 according to a sixth embodiment of the present invention.
As shown in fig. 15, a defrosting control system 600 according to a sixth embodiment of the present invention includes:
a defrosting unit 602, configured to operate a defrosting mode in response to a defrosting instruction;
a second obtaining unit 604 for obtaining an outdoor ambient temperature;
a second determining unit 606, configured to determine whether the outdoor environment temperature is in a temperature range where frosting easily occurs;
the second obtaining unit 604 is further configured to obtain the temperature of the outdoor heat exchanger in real time when the determination result of the second determining unit 606 is yes, and calculate a difference between the temperature of the first outdoor heat exchanger obtained when the determination result of the second determining unit 606 is yes and the temperature of the second outdoor heat exchanger obtained when the defrosting unit 602 receives the defrosting instruction;
a first judging unit 608, configured to judge whether the difference is greater than or equal to a preset difference, and activate the control unit 610 if the judgment result is yes;
a control unit 610 for controlling the indoor fan to operate at a preset rotation speed;
a fourth obtaining unit 612, configured to obtain a third operating parameter of the air conditioning system;
a searching unit 614, configured to search for a preset duration corresponding to the third operating parameter;
the timing unit 616 is configured to start timing after the control unit 610 controls the indoor fan to operate at the preset rotation speed, so as to obtain an operation duration of the indoor fan;
a fourth determining unit 618, configured to determine whether the indoor fan operation duration is greater than or equal to a preset duration;
the control unit 610 is further configured to turn off the indoor fan when the judgment result of the fourth judgment unit 618 is yes.
In this embodiment, the preset durations corresponding to different operation parameters are different, and after the fourth obtaining unit 612 obtains the parameter for controlling the indoor fan to stop operating, the searching unit 614 determines the corresponding preset duration according to the parameter itself, and further determines an accurate time to stop the indoor fan, so as to avoid the occurrence of incomplete defrosting or energy waste caused by stopping the indoor fan too early or too late.
Embodiments of the third aspect of the present invention provide a computer device, as shown in fig. 16, the computer device 700 includes a memory 702, a processor 704 and a computer program stored on the memory 702 and executable on the processor 704, and the processor 704 implements the steps of the method according to any of the above embodiments when executing the computer program.
In the computer device 700 provided by the present invention, when the processor 704 executes the computer program stored in the memory 702, the steps of the method according to any of the above embodiments can be implemented, so that all the beneficial technical effects of the defrosting control method described above are achieved, and are not described herein again.
An embodiment of a fourth aspect of the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method according to any one of the embodiments described above.
In the computer-readable storage medium provided by the present invention, when being executed by a processor, the computer program stored thereon can implement the steps of the method according to any of the above embodiments, so that the method has all the beneficial technical effects of the above defrosting control method, and further description is omitted here.
The technical scheme of the invention is explained in detail in the above with the help of the attached drawings, and the invention responds to the defrosting instruction and operates the defrosting mode; judging whether a first operation parameter of the air conditioning system meets a first preset condition or not; and when the first operation parameter meets a first preset condition, controlling the indoor fan to operate at a preset rotating speed. When the outdoor heat exchanger frosts seriously, the refrigeration cycle state of the air conditioning system is started, the outdoor heat exchanger is adjusted to be a condenser, the temperature of the outdoor heat exchanger rises, and therefore defrosting is accelerated, an indoor fan is controlled to operate according to a preset rotating speed, the heat exchange quantity of an evaporation side is improved, the condensing pressure of the outdoor heat exchanger is increased, the refrigerant circulation quantity is improved, the defrosting speed is increased, and discomfort caused by blowing cold air for a user is reduced or avoided.
Specifically, fig. 17 shows that the outdoor environment temperature divides the frost-prone region and the frost-less regionSchematic representation. Dividing the indoor environment into a non-frosting area and a frosting area according to the outdoor environment temperature, wherein TaAnd TbCan be obtained by setting TaAbove and TbThe region with low frosting tendency, TaThe following and TbThe above is the interval of easy frosting, and the research shows that-3 ℃ to 3 ℃ is the most frosty temperature interval, so that T can be seta＝3℃，Tb-3 ℃. When the outdoor heat exchanger runs in the frosting-prone interval, detecting the temperature T when the outdoor heat exchanger starts frosting0And the temperature T before defrosting1And find the difference if T0－T1≥TnWherein T isnThe difference is a preset difference, and when the inequality is established, the temperature of the outdoor heat exchanger is greatly reduced, the frosting is determined to be serious, and an indoor fan needs to be controlled to operate to accelerate the defrosting.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A defrosting control method for an air conditioning system, wherein the air conditioning system comprises an indoor fan, and the defrosting control method comprises the following steps:
responding to a defrosting instruction, and operating a defrosting mode;
judging whether a first operation parameter of the air conditioning system meets a first preset condition or not;
when the first operation parameter meets the first preset condition, controlling the indoor fan to operate at a preset rotating speed;
before the step of operating the defrosting mode in response to the defrosting instruction, the method further comprises the following steps:
acquiring the outdoor environment temperature;
judging whether the outdoor environment temperature is in a temperature range easy to frost or not;
when the judgment result is yes, acquiring the temperature of the outdoor heat exchanger in real time, and calculating the difference value between the temperature of the first outdoor heat exchanger acquired when the judgment result is yes and the temperature of the second outdoor heat exchanger acquired when the defrosting instruction is received;
the step of judging whether the first operation parameter of the air conditioning system meets a first preset condition comprises the following steps:
and judging whether the difference value is larger than or equal to a preset difference value or not.
2. The defrosting control method according to claim 1,
before the operation of judging whether the first operating parameter of the air conditioning system meets the first preset condition, the method further comprises the following steps:
acquiring the temperature of an outdoor heat exchanger;
the operation of judging whether the first operating parameter of the air conditioning system meets a first preset condition comprises the following steps:
judging whether the temperature of the outdoor heat exchanger is less than or equal to a preset temperature or not; and/or
And acquiring the outdoor environment temperature, and judging whether the difference between the outdoor environment temperature and the temperature of the outdoor heat exchanger is greater than or equal to a preset difference.
3. The defrosting control method according to claim 1, further comprising, before the controlling the operation of the indoor fan at a preset rotation speed when the first operation parameter satisfies the first preset condition:
and searching the preset rotating speed corresponding to the first operating parameter.
4. The defrosting control method according to claim 1, further comprising, after the operation of controlling the indoor fan to operate at a preset rotation speed:
acquiring a second operation parameter of the air conditioning system in real time;
judging whether the second operation parameter meets a second preset condition or not;
and when the second operation parameter meets the second preset condition, closing the indoor fan.
5. The defrosting control method according to claim 4,
the step of acquiring a second operating parameter of the air conditioning system in real time comprises:
acquiring the circulating pressure of the air conditioning system in real time;
the step of judging whether the second operation parameter meets a second preset condition comprises the following steps:
and judging whether the circulating pressure is greater than or equal to a preset pressure or not.
6. The defrosting control method according to any one of claims 1 to 5, further comprising, after the operation of controlling the indoor fan to operate at a preset rotation speed:
starting timing to obtain the running time of the indoor fan;
judging whether the running time of the indoor fan is greater than or equal to a preset time;
and when the running time of the indoor fan is more than or equal to the preset time, closing the indoor fan.
7. The defrosting control method according to claim 6, further comprising, before the step of starting the timing to obtain an operating time period of the indoor fan:
acquiring a third operating parameter of the air conditioning system;
and searching the preset time length corresponding to the third operation parameter.
8. A defrosting control system for an air conditioning system, the air conditioning system including an indoor fan, the defrosting control system comprising:
the defrosting unit is used for responding to a defrosting instruction and operating a defrosting mode;
the first judgment unit is used for judging whether a first operation parameter of the air conditioning system meets a first preset condition or not and activating the control unit when the judgment result is yes;
the control unit is used for controlling the indoor fan to operate at a preset rotating speed;
a second acquiring unit for acquiring an outdoor ambient temperature;
the second judgment unit is used for judging whether the outdoor environment temperature is in a frosting-prone temperature range or not;
the second obtaining unit is further configured to obtain the temperature of the outdoor heat exchanger in real time when the determination result of the second determining unit is yes, and calculate a difference between the temperature of the first outdoor heat exchanger obtained when the determination result of the second determining unit is yes and the temperature of the second outdoor heat exchanger obtained when the defrosting unit receives the defrosting instruction;
the first judging unit is specifically configured to judge whether the difference is greater than or equal to a preset difference.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
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CN109269019B (en) * 2018-10-10 2020-10-23 珠海格力电器股份有限公司 Defrosting control method and device and heating equipment
CN109539501A (en) * 2018-11-16 2019-03-29 珠海格力电器股份有限公司 A kind of air conditioning control method, device, storage medium and air-conditioning
CN110567116B (en) * 2019-08-20 2020-08-04 上海朗绿建筑科技股份有限公司 Defrosting control method and system for air treatment unit, storage medium and processor
CN111219852B (en) * 2020-01-10 2021-07-27 宁波奥克斯电气股份有限公司 Defrosting method and device, air conditioner and storage medium
CN112628941B (en) * 2020-12-11 2022-02-18 珠海格力电器股份有限公司 Air conditioner defrosting control method and device, storage medium and air conditioner
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